--- /dev/null
+// mips.cc -- mips target support for gold.
+
+// Copyright (C) 2011-2014 Free Software Foundation, Inc.
+// Written by Sasa Stankovic <sasa.stankovic@imgtec.com>
+// and Aleksandar Simeonov <aleksandar.simeonov@rt-rk.com>.
+// This file contains borrowed and adapted code from bfd/elfxx-mips.c.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include "gold.h"
+
+#include <algorithm>
+#include <set>
+#include <sstream>
+#include "demangle.h"
+
+#include "elfcpp.h"
+#include "parameters.h"
+#include "reloc.h"
+#include "mips.h"
+#include "object.h"
+#include "symtab.h"
+#include "layout.h"
+#include "output.h"
+#include "copy-relocs.h"
+#include "target.h"
+#include "target-reloc.h"
+#include "target-select.h"
+#include "tls.h"
+#include "errors.h"
+#include "gc.h"
+
+namespace
+{
+using namespace gold;
+
+template<int size, bool big_endian>
+class Mips_output_data_plt;
+
+template<int size, bool big_endian>
+class Mips_output_data_got;
+
+template<int size, bool big_endian>
+class Target_mips;
+
+template<int size, bool big_endian>
+class Mips_output_section_reginfo;
+
+template<int size, bool big_endian>
+class Mips_output_data_la25_stub;
+
+template<int size, bool big_endian>
+class Mips_output_data_mips_stubs;
+
+template<int size>
+class Mips_symbol;
+
+template<int size, bool big_endian>
+class Mips_got_info;
+
+template<int size, bool big_endian>
+class Mips_relobj;
+
+class Mips16_stub_section_base;
+
+template<int size, bool big_endian>
+class Mips16_stub_section;
+
+// The ABI says that every symbol used by dynamic relocations must have
+// a global GOT entry. Among other things, this provides the dynamic
+// linker with a free, directly-indexed cache. The GOT can therefore
+// contain symbols that are not referenced by GOT relocations themselves
+// (in other words, it may have symbols that are not referenced by things
+// like R_MIPS_GOT16 and R_MIPS_GOT_PAGE).
+
+// GOT relocations are less likely to overflow if we put the associated
+// GOT entries towards the beginning. We therefore divide the global
+// GOT entries into two areas: "normal" and "reloc-only". Entries in
+// the first area can be used for both dynamic relocations and GP-relative
+// accesses, while those in the "reloc-only" area are for dynamic
+// relocations only.
+
+// These GGA_* ("Global GOT Area") values are organised so that lower
+// values are more general than higher values. Also, non-GGA_NONE
+// values are ordered by the position of the area in the GOT.
+
+enum Global_got_area
+{
+ GGA_NORMAL = 0,
+ GGA_RELOC_ONLY = 1,
+ GGA_NONE = 2
+};
+
+// The types of GOT entries needed for this platform.
+// These values are exposed to the ABI in an incremental link.
+// Do not renumber existing values without changing the version
+// number of the .gnu_incremental_inputs section.
+enum Got_type
+{
+ GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
+ GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
+ GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
+
+ // GOT entries for multi-GOT. We support up to 1024 GOTs in multi-GOT links.
+ GOT_TYPE_STANDARD_MULTIGOT = 3,
+ GOT_TYPE_TLS_OFFSET_MULTIGOT = GOT_TYPE_STANDARD_MULTIGOT + 1024,
+ GOT_TYPE_TLS_PAIR_MULTIGOT = GOT_TYPE_TLS_OFFSET_MULTIGOT + 1024
+};
+
+// TLS type of GOT entry.
+enum Got_tls_type
+{
+ GOT_TLS_NONE = 0,
+ GOT_TLS_GD = 1,
+ GOT_TLS_LDM = 2,
+ GOT_TLS_IE = 4
+};
+
+// Return TRUE if a relocation of type R_TYPE from OBJECT might
+// require an la25 stub. See also local_pic_function, which determines
+// whether the destination function ever requires a stub.
+template<int size, bool big_endian>
+static inline bool
+relocation_needs_la25_stub(Mips_relobj<size, big_endian>* object,
+ unsigned int r_type, bool target_is_16_bit_code)
+{
+ // We specifically ignore branches and jumps from EF_PIC objects,
+ // where the onus is on the compiler or programmer to perform any
+ // necessary initialization of $25. Sometimes such initialization
+ // is unnecessary; for example, -mno-shared functions do not use
+ // the incoming value of $25, and may therefore be called directly.
+ if (object->is_pic())
+ return false;
+
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MIPS_PC16:
+ case elfcpp::R_MICROMIPS_26_S1:
+ case elfcpp::R_MICROMIPS_PC7_S1:
+ case elfcpp::R_MICROMIPS_PC10_S1:
+ case elfcpp::R_MICROMIPS_PC16_S1:
+ case elfcpp::R_MICROMIPS_PC23_S2:
+ return true;
+
+ case elfcpp::R_MIPS16_26:
+ return !target_is_16_bit_code;
+
+ default:
+ return false;
+ }
+}
+
+// Return true if SYM is a locally-defined PIC function, in the sense
+// that it or its fn_stub might need $25 to be valid on entry.
+// Note that MIPS16 functions set up $gp using PC-relative instructions,
+// so they themselves never need $25 to be valid. Only non-MIPS16
+// entry points are of interest here.
+template<int size, bool big_endian>
+static inline bool
+local_pic_function(Mips_symbol<size>* sym)
+{
+ bool def_regular = (sym->source() == Symbol::FROM_OBJECT
+ && !sym->object()->is_dynamic()
+ && !sym->is_undefined());
+
+ if (sym->is_defined() && def_regular)
+ {
+ Mips_relobj<size, big_endian>* object =
+ static_cast<Mips_relobj<size, big_endian>*>(sym->object());
+
+ if ((object->is_pic() || sym->is_pic())
+ && (!sym->is_mips16()
+ || (sym->has_mips16_fn_stub() && sym->need_fn_stub())))
+ return true;
+ }
+ return false;
+}
+
+static inline bool
+hi16_reloc(int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_HI16
+ || r_type == elfcpp::R_MIPS16_HI16
+ || r_type == elfcpp::R_MICROMIPS_HI16);
+}
+
+static inline bool
+lo16_reloc(int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_LO16
+ || r_type == elfcpp::R_MIPS16_LO16
+ || r_type == elfcpp::R_MICROMIPS_LO16);
+}
+
+static inline bool
+got16_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_GOT16
+ || r_type == elfcpp::R_MIPS16_GOT16
+ || r_type == elfcpp::R_MICROMIPS_GOT16);
+}
+
+static inline bool
+call_lo16_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_CALL_LO16
+ || r_type == elfcpp::R_MICROMIPS_CALL_LO16);
+}
+
+static inline bool
+got_lo16_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_GOT_LO16
+ || r_type == elfcpp::R_MICROMIPS_GOT_LO16);
+}
+
+static inline bool
+got_disp_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_GOT_DISP
+ || r_type == elfcpp::R_MICROMIPS_GOT_DISP);
+}
+
+static inline bool
+got_page_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_GOT_PAGE
+ || r_type == elfcpp::R_MICROMIPS_GOT_PAGE);
+}
+
+static inline bool
+tls_gd_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_TLS_GD
+ || r_type == elfcpp::R_MIPS16_TLS_GD
+ || r_type == elfcpp::R_MICROMIPS_TLS_GD);
+}
+
+static inline bool
+tls_gottprel_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_TLS_GOTTPREL
+ || r_type == elfcpp::R_MIPS16_TLS_GOTTPREL
+ || r_type == elfcpp::R_MICROMIPS_TLS_GOTTPREL);
+}
+
+static inline bool
+tls_ldm_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_TLS_LDM
+ || r_type == elfcpp::R_MIPS16_TLS_LDM
+ || r_type == elfcpp::R_MICROMIPS_TLS_LDM);
+}
+
+static inline bool
+mips16_call_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS16_26
+ || r_type == elfcpp::R_MIPS16_CALL16);
+}
+
+static inline bool
+jal_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MIPS_26
+ || r_type == elfcpp::R_MIPS16_26
+ || r_type == elfcpp::R_MICROMIPS_26_S1);
+}
+
+static inline bool
+micromips_branch_reloc(unsigned int r_type)
+{
+ return (r_type == elfcpp::R_MICROMIPS_26_S1
+ || r_type == elfcpp::R_MICROMIPS_PC16_S1
+ || r_type == elfcpp::R_MICROMIPS_PC10_S1
+ || r_type == elfcpp::R_MICROMIPS_PC7_S1);
+}
+
+// Check if R_TYPE is a MIPS16 reloc.
+static inline bool
+mips16_reloc(unsigned int r_type)
+{
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS16_26:
+ case elfcpp::R_MIPS16_GPREL:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS16_LO16:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_DTPREL_HI16:
+ case elfcpp::R_MIPS16_TLS_DTPREL_LO16:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_TPREL_HI16:
+ case elfcpp::R_MIPS16_TLS_TPREL_LO16:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+// Check if R_TYPE is a microMIPS reloc.
+static inline bool
+micromips_reloc(unsigned int r_type)
+{
+ switch (r_type)
+ {
+ case elfcpp::R_MICROMIPS_26_S1:
+ case elfcpp::R_MICROMIPS_HI16:
+ case elfcpp::R_MICROMIPS_LO16:
+ case elfcpp::R_MICROMIPS_GPREL16:
+ case elfcpp::R_MICROMIPS_LITERAL:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_PC7_S1:
+ case elfcpp::R_MICROMIPS_PC10_S1:
+ case elfcpp::R_MICROMIPS_PC16_S1:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MICROMIPS_GOT_DISP:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_OFST:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_SUB:
+ case elfcpp::R_MICROMIPS_HIGHER:
+ case elfcpp::R_MICROMIPS_HIGHEST:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_SCN_DISP:
+ case elfcpp::R_MICROMIPS_JALR:
+ case elfcpp::R_MICROMIPS_HI0_LO16:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16:
+ case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
+ case elfcpp::R_MICROMIPS_GPREL7_S2:
+ case elfcpp::R_MICROMIPS_PC23_S2:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
+static inline bool
+is_matching_lo16_reloc(unsigned int high_reloc, unsigned int lo16_reloc)
+{
+ switch (high_reloc)
+ {
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MIPS_GOT16:
+ return lo16_reloc == elfcpp::R_MIPS_LO16;
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS16_GOT16:
+ return lo16_reloc == elfcpp::R_MIPS16_LO16;
+ case elfcpp::R_MICROMIPS_HI16:
+ case elfcpp::R_MICROMIPS_GOT16:
+ return lo16_reloc == elfcpp::R_MICROMIPS_LO16;
+ default:
+ return false;
+ }
+}
+
+// This class is used to hold information about one GOT entry.
+// There are three types of entry:
+//
+// (1) a SYMBOL + OFFSET address, where SYMBOL is local to an input object
+// (object != NULL, symndx >= 0, tls_type != GOT_TLS_LDM)
+// (2) a SYMBOL address, where SYMBOL is not local to an input object
+// (object != NULL, symndx == -1)
+// (3) a TLS LDM slot
+// (object != NULL, symndx == 0, tls_type == GOT_TLS_LDM)
+
+template<int size, bool big_endian>
+class Mips_got_entry
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ public:
+ Mips_got_entry(Mips_relobj<size, big_endian>* object, unsigned int symndx,
+ Mips_address addend, unsigned char tls_type,
+ unsigned int shndx)
+ : object_(object), symndx_(symndx), tls_type_(tls_type), shndx_(shndx)
+ { this->d.addend = addend; }
+
+ Mips_got_entry(Mips_relobj<size, big_endian>* object, Mips_symbol<size>* sym,
+ unsigned char tls_type)
+ : object_(object), symndx_(-1U), tls_type_(tls_type), shndx_(-1U)
+ { this->d.sym = sym; }
+
+ // Return whether this entry is for a local symbol.
+ bool
+ is_for_local_symbol() const
+ { return this->symndx_ != -1U; }
+
+ // Return whether this entry is for a global symbol.
+ bool
+ is_for_global_symbol() const
+ { return this->symndx_ == -1U; }
+
+ // Return the hash of this entry.
+ size_t
+ hash() const
+ {
+ if (this->tls_type_ == GOT_TLS_LDM)
+ return this->symndx_ + (1 << 18);
+ if (this->symndx_ != -1U)
+ {
+ uintptr_t object_id = reinterpret_cast<uintptr_t>(this->object());
+ return this->symndx_ + object_id + this->d.addend;
+ }
+ else
+ {
+ uintptr_t sym_id = reinterpret_cast<uintptr_t>(this->d.sym);
+ return this->symndx_ + sym_id;
+ }
+ }
+
+ // Return whether this entry is equal to OTHER.
+ bool
+ equals(Mips_got_entry<size, big_endian>* other) const
+ {
+ if (this->symndx_ != other->symndx_
+ || this->tls_type_ != other->tls_type_)
+ return false;
+ if (this->tls_type_ == GOT_TLS_LDM)
+ return true;
+ if (this->symndx_ != -1U)
+ return (this->object() == other->object()
+ && this->d.addend == other->d.addend);
+ else
+ return this->d.sym == other->d.sym;
+ }
+
+ // Return input object that needs this GOT entry.
+ Mips_relobj<size, big_endian>*
+ object() const
+ {
+ gold_assert(this->object_ != NULL);
+ return this->object_;
+ }
+
+ // Return local symbol index for local GOT entries.
+ unsigned int
+ symndx() const
+ {
+ gold_assert(this->symndx_ != -1U);
+ return this->symndx_;
+ }
+
+ // Return the relocation addend for local GOT entries.
+ Mips_address
+ addend() const
+ {
+ gold_assert(this->symndx_ != -1U);
+ return this->d.addend;
+ }
+
+ // Return global symbol for global GOT entries.
+ Mips_symbol<size>*
+ sym() const
+ {
+ gold_assert(this->symndx_ == -1U);
+ return this->d.sym;
+ }
+
+ // Return whether this is a TLS GOT entry.
+ bool
+ is_tls_entry() const
+ { return this->tls_type_ != GOT_TLS_NONE; }
+
+ // Return TLS type of this GOT entry.
+ unsigned char
+ tls_type() const
+ { return this->tls_type_; }
+
+ // Return section index of the local symbol for local GOT entries.
+ unsigned int
+ shndx() const
+ { return this->shndx_; }
+
+ private:
+ // The input object that needs the GOT entry.
+ Mips_relobj<size, big_endian>* object_;
+ // The index of the symbol if we have a local symbol; -1 otherwise.
+ unsigned int symndx_;
+
+ union
+ {
+ // If symndx != -1, the addend of the relocation that should be added to the
+ // symbol value.
+ Mips_address addend;
+ // If symndx == -1, the global symbol corresponding to this GOT entry. The
+ // symbol's entry is in the local area if mips_sym->global_got_area is
+ // GGA_NONE, otherwise it is in the global area.
+ Mips_symbol<size>* sym;
+ } d;
+
+ // The TLS type of this GOT entry. An LDM GOT entry will be a local
+ // symbol entry with r_symndx == 0.
+ unsigned char tls_type_;
+
+ // For local GOT entries, section index of the local symbol.
+ unsigned int shndx_;
+};
+
+// Hash for Mips_got_entry.
+
+template<int size, bool big_endian>
+class Mips_got_entry_hash
+{
+ public:
+ size_t
+ operator()(Mips_got_entry<size, big_endian>* entry) const
+ { return entry->hash(); }
+};
+
+// Equality for Mips_got_entry.
+
+template<int size, bool big_endian>
+class Mips_got_entry_eq
+{
+ public:
+ bool
+ operator()(Mips_got_entry<size, big_endian>* e1,
+ Mips_got_entry<size, big_endian>* e2) const
+ { return e1->equals(e2); }
+};
+
+// Got_page_range. This class describes a range of addends: [MIN_ADDEND,
+// MAX_ADDEND]. The instances form a non-overlapping list that is sorted by
+// increasing MIN_ADDEND.
+
+struct Got_page_range
+{
+ Got_page_range()
+ : next(NULL), min_addend(0), max_addend(0)
+ { }
+
+ Got_page_range* next;
+ int min_addend;
+ int max_addend;
+
+ // Return the maximum number of GOT page entries required.
+ int
+ get_max_pages()
+ { return (this->max_addend - this->min_addend + 0x1ffff) >> 16; }
+};
+
+// Got_page_entry. This class describes the range of addends that are applied
+// to page relocations against a given symbol.
+
+struct Got_page_entry
+{
+ Got_page_entry()
+ : object(NULL), symndx(-1U), ranges(NULL), num_pages(0)
+ { }
+
+ Got_page_entry(Object* object_, unsigned int symndx_)
+ : object(object_), symndx(symndx_), ranges(NULL), num_pages(0)
+ { }
+
+ // The input object that needs the GOT page entry.
+ Object* object;
+ // The index of the symbol, as stored in the relocation r_info.
+ unsigned int symndx;
+ // The ranges for this page entry.
+ Got_page_range* ranges;
+ // The maximum number of page entries needed for RANGES.
+ unsigned int num_pages;
+};
+
+// Hash for Got_page_entry.
+
+struct Got_page_entry_hash
+{
+ size_t
+ operator()(Got_page_entry* entry) const
+ { return reinterpret_cast<uintptr_t>(entry->object) + entry->symndx; }
+};
+
+// Equality for Got_page_entry.
+
+struct Got_page_entry_eq
+{
+ bool
+ operator()(Got_page_entry* entry1, Got_page_entry* entry2) const
+ {
+ return entry1->object == entry2->object && entry1->symndx == entry2->symndx;
+ }
+};
+
+// This class is used to hold .got information when linking.
+
+template<int size, bool big_endian>
+class Mips_got_info
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
+ Reloc_section;
+ typedef Unordered_map<unsigned int, unsigned int> Got_page_offsets;
+
+ // Unordered set of GOT entries.
+ typedef Unordered_set<Mips_got_entry<size, big_endian>*,
+ Mips_got_entry_hash<size, big_endian>,
+ Mips_got_entry_eq<size, big_endian> > Got_entry_set;
+
+ // Unordered set of GOT page entries.
+ typedef Unordered_set<Got_page_entry*,
+ Got_page_entry_hash, Got_page_entry_eq> Got_page_entry_set;
+
+ public:
+ Mips_got_info()
+ : local_gotno_(0), page_gotno_(0), global_gotno_(0), reloc_only_gotno_(0),
+ tls_gotno_(0), tls_ldm_offset_(-1U), global_got_symbols_(),
+ got_entries_(), got_page_entries_(), got_page_offset_start_(0),
+ got_page_offset_next_(0), got_page_offsets_(), next_(NULL), index_(-1U),
+ offset_(0)
+ { }
+
+ // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
+ // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
+ void
+ record_local_got_symbol(Mips_relobj<size, big_endian>* object,
+ unsigned int symndx, Mips_address addend,
+ unsigned int r_type, unsigned int shndx);
+
+ // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
+ // in OBJECT. FOR_CALL is true if the caller is only interested in
+ // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
+ // relocation.
+ void
+ record_global_got_symbol(Mips_symbol<size>* mips_sym,
+ Mips_relobj<size, big_endian>* object,
+ unsigned int r_type, bool dyn_reloc, bool for_call);
+
+ // Add ENTRY to master GOT and to OBJECT's GOT.
+ void
+ record_got_entry(Mips_got_entry<size, big_endian>* entry,
+ Mips_relobj<size, big_endian>* object);
+
+ // Record that OBJECT has a page relocation against symbol SYMNDX and
+ // that ADDEND is the addend for that relocation.
+ void
+ record_got_page_entry(Mips_relobj<size, big_endian>* object,
+ unsigned int symndx, int addend);
+
+ // Create all entries that should be in the local part of the GOT.
+ void
+ add_local_entries(Target_mips<size, big_endian>* target, Layout* layout);
+
+ // Create GOT page entries.
+ void
+ add_page_entries(Target_mips<size, big_endian>* target, Layout* layout);
+
+ // Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
+ void
+ add_global_entries(Target_mips<size, big_endian>* target, Layout* layout,
+ unsigned int non_reloc_only_global_gotno);
+
+ // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
+ void
+ add_reloc_only_entries(Mips_output_data_got<size, big_endian>* got);
+
+ // Create TLS GOT entries.
+ void
+ add_tls_entries(Target_mips<size, big_endian>* target, Layout* layout);
+
+ // Decide whether the symbol needs an entry in the global part of the primary
+ // GOT, setting global_got_area accordingly. Count the number of global
+ // symbols that are in the primary GOT only because they have dynamic
+ // relocations R_MIPS_REL32 against them (reloc_only_gotno).
+ void
+ count_got_symbols(Symbol_table* symtab);
+
+ // Return the offset of GOT page entry for VALUE.
+ unsigned int
+ get_got_page_offset(Mips_address value,
+ Mips_output_data_got<size, big_endian>* got);
+
+ // Count the number of GOT entries required.
+ void
+ count_got_entries();
+
+ // Count the number of GOT entries required by ENTRY. Accumulate the result.
+ void
+ count_got_entry(Mips_got_entry<size, big_endian>* entry);
+
+ // Add FROM's GOT entries.
+ void
+ add_got_entries(Mips_got_info<size, big_endian>* from);
+
+ // Add FROM's GOT page entries.
+ void
+ add_got_page_entries(Mips_got_info<size, big_endian>* from);
+
+ // Return GOT size.
+ unsigned int
+ got_size() const
+ { return ((2 + this->local_gotno_ + this->page_gotno_ + this->global_gotno_
+ + this->tls_gotno_) * size/8);
+ }
+
+ // Return the number of local GOT entries.
+ unsigned int
+ local_gotno() const
+ { return this->local_gotno_; }
+
+ // Return the maximum number of page GOT entries needed.
+ unsigned int
+ page_gotno() const
+ { return this->page_gotno_; }
+
+ // Return the number of global GOT entries.
+ unsigned int
+ global_gotno() const
+ { return this->global_gotno_; }
+
+ // Set the number of global GOT entries.
+ void
+ set_global_gotno(unsigned int global_gotno)
+ { this->global_gotno_ = global_gotno; }
+
+ // Return the number of GGA_RELOC_ONLY global GOT entries.
+ unsigned int
+ reloc_only_gotno() const
+ { return this->reloc_only_gotno_; }
+
+ // Return the number of TLS GOT entries.
+ unsigned int
+ tls_gotno() const
+ { return this->tls_gotno_; }
+
+ // Return the GOT type for this GOT. Used for multi-GOT links only.
+ unsigned int
+ multigot_got_type(unsigned int got_type) const
+ {
+ switch (got_type)
+ {
+ case GOT_TYPE_STANDARD:
+ return GOT_TYPE_STANDARD_MULTIGOT + this->index_;
+ case GOT_TYPE_TLS_OFFSET:
+ return GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_;
+ case GOT_TYPE_TLS_PAIR:
+ return GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_;
+ default:
+ gold_unreachable();
+ }
+ }
+
+ // Remove lazy-binding stubs for global symbols in this GOT.
+ void
+ remove_lazy_stubs(Target_mips<size, big_endian>* target);
+
+ // Return offset of this GOT from the start of .got section.
+ unsigned int
+ offset() const
+ { return this->offset_; }
+
+ // Set offset of this GOT from the start of .got section.
+ void
+ set_offset(unsigned int offset)
+ { this->offset_ = offset; }
+
+ // Set index of this GOT in multi-GOT links.
+ void
+ set_index(unsigned int index)
+ { this->index_ = index; }
+
+ // Return next GOT in multi-GOT links.
+ Mips_got_info<size, big_endian>*
+ next() const
+ { return this->next_; }
+
+ // Set next GOT in multi-GOT links.
+ void
+ set_next(Mips_got_info<size, big_endian>* next)
+ { this->next_ = next; }
+
+ // Return the offset of TLS LDM entry for this GOT.
+ unsigned int
+ tls_ldm_offset() const
+ { return this->tls_ldm_offset_; }
+
+ // Set the offset of TLS LDM entry for this GOT.
+ void
+ set_tls_ldm_offset(unsigned int tls_ldm_offset)
+ { this->tls_ldm_offset_ = tls_ldm_offset; }
+
+ Unordered_set<Mips_symbol<size>*>&
+ global_got_symbols()
+ { return this->global_got_symbols_; }
+
+ // Return the GOT_TLS_* type required by relocation type R_TYPE.
+ static int
+ mips_elf_reloc_tls_type(unsigned int r_type)
+ {
+ if (tls_gd_reloc(r_type))
+ return GOT_TLS_GD;
+
+ if (tls_ldm_reloc(r_type))
+ return GOT_TLS_LDM;
+
+ if (tls_gottprel_reloc(r_type))
+ return GOT_TLS_IE;
+
+ return GOT_TLS_NONE;
+ }
+
+ // Return the number of GOT slots needed for GOT TLS type TYPE.
+ static int
+ mips_tls_got_entries(unsigned int type)
+ {
+ switch (type)
+ {
+ case GOT_TLS_GD:
+ case GOT_TLS_LDM:
+ return 2;
+
+ case GOT_TLS_IE:
+ return 1;
+
+ case GOT_TLS_NONE:
+ return 0;
+
+ default:
+ gold_unreachable();
+ }
+ }
+
+ private:
+ // The number of local GOT entries.
+ unsigned int local_gotno_;
+ // The maximum number of page GOT entries needed.
+ unsigned int page_gotno_;
+ // The number of global GOT entries.
+ unsigned int global_gotno_;
+ // The number of global GOT entries that are in the GGA_RELOC_ONLY area.
+ unsigned int reloc_only_gotno_;
+ // The number of TLS GOT entries.
+ unsigned int tls_gotno_;
+ // The offset of TLS LDM entry for this GOT.
+ unsigned int tls_ldm_offset_;
+ // All symbols that have global GOT entry.
+ Unordered_set<Mips_symbol<size>*> global_got_symbols_;
+ // A hash table holding GOT entries.
+ Got_entry_set got_entries_;
+ // A hash table of GOT page entries.
+ Got_page_entry_set got_page_entries_;
+ // The offset of first GOT page entry for this GOT.
+ unsigned int got_page_offset_start_;
+ // The offset of next available GOT page entry for this GOT.
+ unsigned int got_page_offset_next_;
+ // A hash table that maps GOT page entry value to the GOT offset where
+ // the entry is located.
+ Got_page_offsets got_page_offsets_;
+ // In multi-GOT links, a pointer to the next GOT.
+ Mips_got_info<size, big_endian>* next_;
+ // Index of this GOT in multi-GOT links.
+ unsigned int index_;
+ // The offset of this GOT in multi-GOT links.
+ unsigned int offset_;
+};
+
+// This is a helper class used during relocation scan. It records GOT16 addend.
+
+template<int size, bool big_endian>
+struct got16_addend
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ got16_addend(const Sized_relobj_file<size, big_endian>* _object,
+ unsigned int _shndx, unsigned int _r_type, unsigned int _r_sym,
+ Mips_address _addend)
+ : object(_object), shndx(_shndx), r_type(_r_type), r_sym(_r_sym),
+ addend(_addend)
+ { }
+
+ const Sized_relobj_file<size, big_endian>* object;
+ unsigned int shndx;
+ unsigned int r_type;
+ unsigned int r_sym;
+ Mips_address addend;
+};
+
+// Mips_symbol class. Holds additional symbol information needed for Mips.
+
+template<int size>
+class Mips_symbol : public Sized_symbol<size>
+{
+ public:
+ Mips_symbol()
+ : need_fn_stub_(false), has_nonpic_branches_(false), la25_stub_offset_(-1U),
+ has_static_relocs_(false), no_lazy_stub_(false), lazy_stub_offset_(0),
+ pointer_equality_needed_(false), global_got_area_(GGA_NONE),
+ global_gotoffset_(-1U), got_only_for_calls_(true), has_lazy_stub_(false),
+ needs_mips_plt_(false), needs_comp_plt_(false), mips_plt_offset_(-1U),
+ comp_plt_offset_(-1U), mips16_fn_stub_(NULL), mips16_call_stub_(NULL),
+ mips16_call_fp_stub_(NULL), applied_secondary_got_fixup_(false)
+ { }
+
+ // Return whether this is a MIPS16 symbol.
+ bool
+ is_mips16() const
+ {
+ // (st_other & STO_MIPS16) == STO_MIPS16
+ return ((this->nonvis() & (elfcpp::STO_MIPS16 >> 2))
+ == elfcpp::STO_MIPS16 >> 2);
+ }
+
+ // Return whether this is a microMIPS symbol.
+ bool
+ is_micromips() const
+ {
+ // (st_other & STO_MIPS_ISA) == STO_MICROMIPS
+ return ((this->nonvis() & (elfcpp::STO_MIPS_ISA >> 2))
+ == elfcpp::STO_MICROMIPS >> 2);
+ }
+
+ // Return whether the symbol needs MIPS16 fn_stub.
+ bool
+ need_fn_stub() const
+ { return this->need_fn_stub_; }
+
+ // Set that the symbol needs MIPS16 fn_stub.
+ void
+ set_need_fn_stub()
+ { this->need_fn_stub_ = true; }
+
+ // Return whether this symbol is referenced by branch relocations from
+ // any non-PIC input file.
+ bool
+ has_nonpic_branches() const
+ { return this->has_nonpic_branches_; }
+
+ // Set that this symbol is referenced by branch relocations from
+ // any non-PIC input file.
+ void
+ set_has_nonpic_branches()
+ { this->has_nonpic_branches_ = true; }
+
+ // Return the offset of the la25 stub for this symbol from the start of the
+ // la25 stub section.
+ unsigned int
+ la25_stub_offset() const
+ { return this->la25_stub_offset_; }
+
+ // Set the offset of the la25 stub for this symbol from the start of the
+ // la25 stub section.
+ void
+ set_la25_stub_offset(unsigned int offset)
+ { this->la25_stub_offset_ = offset; }
+
+ // Return whether the symbol has la25 stub. This is true if this symbol is
+ // for a PIC function, and there are non-PIC branches and jumps to it.
+ bool
+ has_la25_stub() const
+ { return this->la25_stub_offset_ != -1U; }
+
+ // Return whether there is a relocation against this symbol that must be
+ // resolved by the static linker (that is, the relocation cannot possibly
+ // be made dynamic).
+ bool
+ has_static_relocs() const
+ { return this->has_static_relocs_; }
+
+ // Set that there is a relocation against this symbol that must be resolved
+ // by the static linker (that is, the relocation cannot possibly be made
+ // dynamic).
+ void
+ set_has_static_relocs()
+ { this->has_static_relocs_ = true; }
+
+ // Return whether we must not create a lazy-binding stub for this symbol.
+ bool
+ no_lazy_stub() const
+ { return this->no_lazy_stub_; }
+
+ // Set that we must not create a lazy-binding stub for this symbol.
+ void
+ set_no_lazy_stub()
+ { this->no_lazy_stub_ = true; }
+
+ // Return the offset of the lazy-binding stub for this symbol from the start
+ // of .MIPS.stubs section.
+ unsigned int
+ lazy_stub_offset() const
+ { return this->lazy_stub_offset_; }
+
+ // Set the offset of the lazy-binding stub for this symbol from the start
+ // of .MIPS.stubs section.
+ void
+ set_lazy_stub_offset(unsigned int offset)
+ { this->lazy_stub_offset_ = offset; }
+
+ // Return whether there are any relocations for this symbol where
+ // pointer equality matters.
+ bool
+ pointer_equality_needed() const
+ { return this->pointer_equality_needed_; }
+
+ // Set that there are relocations for this symbol where pointer equality
+ // matters.
+ void
+ set_pointer_equality_needed()
+ { this->pointer_equality_needed_ = true; }
+
+ // Return global GOT area where this symbol in located.
+ Global_got_area
+ global_got_area() const
+ { return this->global_got_area_; }
+
+ // Set global GOT area where this symbol in located.
+ void
+ set_global_got_area(Global_got_area global_got_area)
+ { this->global_got_area_ = global_got_area; }
+
+ // Return the global GOT offset for this symbol. For multi-GOT links, this
+ // returns the offset from the start of .got section to the first GOT entry
+ // for the symbol. Note that in multi-GOT links the symbol can have entry
+ // in more than one GOT.
+ unsigned int
+ global_gotoffset() const
+ { return this->global_gotoffset_; }
+
+ // Set the global GOT offset for this symbol. Note that in multi-GOT links
+ // the symbol can have entry in more than one GOT. This method will set
+ // the offset only if it is less than current offset.
+ void
+ set_global_gotoffset(unsigned int offset)
+ {
+ if (this->global_gotoffset_ == -1U || offset < this->global_gotoffset_)
+ this->global_gotoffset_ = offset;
+ }
+
+ // Return whether all GOT relocations for this symbol are for calls.
+ bool
+ got_only_for_calls() const
+ { return this->got_only_for_calls_; }
+
+ // Set that there is a GOT relocation for this symbol that is not for call.
+ void
+ set_got_not_only_for_calls()
+ { this->got_only_for_calls_ = false; }
+
+ // Return whether this is a PIC symbol.
+ bool
+ is_pic() const
+ {
+ // (st_other & STO_MIPS_FLAGS) == STO_MIPS_PIC
+ return ((this->nonvis() & (elfcpp::STO_MIPS_FLAGS >> 2))
+ == (elfcpp::STO_MIPS_PIC >> 2));
+ }
+
+ // Set the flag in st_other field that marks this symbol as PIC.
+ void
+ set_pic()
+ {
+ if (this->is_mips16())
+ // (st_other & ~(STO_MIPS16 | STO_MIPS_FLAGS)) | STO_MIPS_PIC
+ this->set_nonvis((this->nonvis()
+ & ~((elfcpp::STO_MIPS16 >> 2)
+ | (elfcpp::STO_MIPS_FLAGS >> 2)))
+ | (elfcpp::STO_MIPS_PIC >> 2));
+ else
+ // (other & ~STO_MIPS_FLAGS) | STO_MIPS_PIC
+ this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2))
+ | (elfcpp::STO_MIPS_PIC >> 2));
+ }
+
+ // Set the flag in st_other field that marks this symbol as PLT.
+ void
+ set_mips_plt()
+ {
+ if (this->is_mips16())
+ // (st_other & (STO_MIPS16 | ~STO_MIPS_FLAGS)) | STO_MIPS_PLT
+ this->set_nonvis((this->nonvis()
+ & ((elfcpp::STO_MIPS16 >> 2)
+ | ~(elfcpp::STO_MIPS_FLAGS >> 2)))
+ | (elfcpp::STO_MIPS_PLT >> 2));
+
+ else
+ // (st_other & ~STO_MIPS_FLAGS) | STO_MIPS_PLT
+ this->set_nonvis((this->nonvis() & ~(elfcpp::STO_MIPS_FLAGS >> 2))
+ | (elfcpp::STO_MIPS_PLT >> 2));
+ }
+
+ // Downcast a base pointer to a Mips_symbol pointer.
+ static Mips_symbol<size>*
+ as_mips_sym(Symbol* sym)
+ { return static_cast<Mips_symbol<size>*>(sym); }
+
+ // Downcast a base pointer to a Mips_symbol pointer.
+ static const Mips_symbol<size>*
+ as_mips_sym(const Symbol* sym)
+ { return static_cast<const Mips_symbol<size>*>(sym); }
+
+ // Return whether the symbol has lazy-binding stub.
+ bool
+ has_lazy_stub() const
+ { return this->has_lazy_stub_; }
+
+ // Set whether the symbol has lazy-binding stub.
+ void
+ set_has_lazy_stub(bool has_lazy_stub)
+ { this->has_lazy_stub_ = has_lazy_stub; }
+
+ // Return whether the symbol needs a standard PLT entry.
+ bool
+ needs_mips_plt() const
+ { return this->needs_mips_plt_; }
+
+ // Set whether the symbol needs a standard PLT entry.
+ void
+ set_needs_mips_plt(bool needs_mips_plt)
+ { this->needs_mips_plt_ = needs_mips_plt; }
+
+ // Return whether the symbol needs a compressed (MIPS16 or microMIPS) PLT
+ // entry.
+ bool
+ needs_comp_plt() const
+ { return this->needs_comp_plt_; }
+
+ // Set whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
+ void
+ set_needs_comp_plt(bool needs_comp_plt)
+ { this->needs_comp_plt_ = needs_comp_plt; }
+
+ // Return standard PLT entry offset, or -1 if none.
+ unsigned int
+ mips_plt_offset() const
+ { return this->mips_plt_offset_; }
+
+ // Set standard PLT entry offset.
+ void
+ set_mips_plt_offset(unsigned int mips_plt_offset)
+ { this->mips_plt_offset_ = mips_plt_offset; }
+
+ // Return whether the symbol has standard PLT entry.
+ bool
+ has_mips_plt_offset() const
+ { return this->mips_plt_offset_ != -1U; }
+
+ // Return compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
+ unsigned int
+ comp_plt_offset() const
+ { return this->comp_plt_offset_; }
+
+ // Set compressed (MIPS16 or microMIPS) PLT entry offset.
+ void
+ set_comp_plt_offset(unsigned int comp_plt_offset)
+ { this->comp_plt_offset_ = comp_plt_offset; }
+
+ // Return whether the symbol has compressed (MIPS16 or microMIPS) PLT entry.
+ bool
+ has_comp_plt_offset() const
+ { return this->comp_plt_offset_ != -1U; }
+
+ // Return MIPS16 fn stub for a symbol.
+ template<bool big_endian>
+ Mips16_stub_section<size, big_endian>*
+ get_mips16_fn_stub() const
+ {
+ return static_cast<Mips16_stub_section<size, big_endian>*>(mips16_fn_stub_);
+ }
+
+ // Set MIPS16 fn stub for a symbol.
+ void
+ set_mips16_fn_stub(Mips16_stub_section_base* stub)
+ { this->mips16_fn_stub_ = stub; }
+
+ // Return whether symbol has MIPS16 fn stub.
+ bool
+ has_mips16_fn_stub() const
+ { return this->mips16_fn_stub_ != NULL; }
+
+ // Return MIPS16 call stub for a symbol.
+ template<bool big_endian>
+ Mips16_stub_section<size, big_endian>*
+ get_mips16_call_stub() const
+ {
+ return static_cast<Mips16_stub_section<size, big_endian>*>(
+ mips16_call_stub_);
+ }
+
+ // Set MIPS16 call stub for a symbol.
+ void
+ set_mips16_call_stub(Mips16_stub_section_base* stub)
+ { this->mips16_call_stub_ = stub; }
+
+ // Return whether symbol has MIPS16 call stub.
+ bool
+ has_mips16_call_stub() const
+ { return this->mips16_call_stub_ != NULL; }
+
+ // Return MIPS16 call_fp stub for a symbol.
+ template<bool big_endian>
+ Mips16_stub_section<size, big_endian>*
+ get_mips16_call_fp_stub() const
+ {
+ return static_cast<Mips16_stub_section<size, big_endian>*>(
+ mips16_call_fp_stub_);
+ }
+
+ // Set MIPS16 call_fp stub for a symbol.
+ void
+ set_mips16_call_fp_stub(Mips16_stub_section_base* stub)
+ { this->mips16_call_fp_stub_ = stub; }
+
+ // Return whether symbol has MIPS16 call_fp stub.
+ bool
+ has_mips16_call_fp_stub() const
+ { return this->mips16_call_fp_stub_ != NULL; }
+
+ bool
+ get_applied_secondary_got_fixup() const
+ { return applied_secondary_got_fixup_; }
+
+ void
+ set_applied_secondary_got_fixup()
+ { this->applied_secondary_got_fixup_ = true; }
+
+ private:
+ // Whether the symbol needs MIPS16 fn_stub. This is true if this symbol
+ // appears in any relocs other than a 16 bit call.
+ bool need_fn_stub_;
+
+ // True if this symbol is referenced by branch relocations from
+ // any non-PIC input file. This is used to determine whether an
+ // la25 stub is required.
+ bool has_nonpic_branches_;
+
+ // The offset of the la25 stub for this symbol from the start of the
+ // la25 stub section.
+ unsigned int la25_stub_offset_;
+
+ // True if there is a relocation against this symbol that must be
+ // resolved by the static linker (that is, the relocation cannot
+ // possibly be made dynamic).
+ bool has_static_relocs_;
+
+ // Whether we must not create a lazy-binding stub for this symbol.
+ // This is true if the symbol has relocations related to taking the
+ // function's address.
+ bool no_lazy_stub_;
+
+ // The offset of the lazy-binding stub for this symbol from the start of
+ // .MIPS.stubs section.
+ unsigned int lazy_stub_offset_;
+
+ // True if there are any relocations for this symbol where pointer equality
+ // matters.
+ bool pointer_equality_needed_;
+
+ // Global GOT area where this symbol in located, or GGA_NONE if symbol is not
+ // in the global part of the GOT.
+ Global_got_area global_got_area_;
+
+ // The global GOT offset for this symbol. For multi-GOT links, this is offset
+ // from the start of .got section to the first GOT entry for the symbol.
+ // Note that in multi-GOT links the symbol can have entry in more than one GOT.
+ unsigned int global_gotoffset_;
+
+ // Whether all GOT relocations for this symbol are for calls.
+ bool got_only_for_calls_;
+ // Whether the symbol has lazy-binding stub.
+ bool has_lazy_stub_;
+ // Whether the symbol needs a standard PLT entry.
+ bool needs_mips_plt_;
+ // Whether the symbol needs a compressed (MIPS16 or microMIPS) PLT entry.
+ bool needs_comp_plt_;
+ // Standard PLT entry offset, or -1 if none.
+ unsigned int mips_plt_offset_;
+ // Compressed (MIPS16 or microMIPS) PLT entry offset, or -1 if none.
+ unsigned int comp_plt_offset_;
+ // MIPS16 fn stub for a symbol.
+ Mips16_stub_section_base* mips16_fn_stub_;
+ // MIPS16 call stub for a symbol.
+ Mips16_stub_section_base* mips16_call_stub_;
+ // MIPS16 call_fp stub for a symbol.
+ Mips16_stub_section_base* mips16_call_fp_stub_;
+
+ bool applied_secondary_got_fixup_;
+};
+
+// Mips16_stub_section class.
+
+// The mips16 compiler uses a couple of special sections to handle
+// floating point arguments.
+
+// Section names that look like .mips16.fn.FNNAME contain stubs that
+// copy floating point arguments from the fp regs to the gp regs and
+// then jump to FNNAME. If any 32 bit function calls FNNAME, the
+// call should be redirected to the stub instead. If no 32 bit
+// function calls FNNAME, the stub should be discarded. We need to
+// consider any reference to the function, not just a call, because
+// if the address of the function is taken we will need the stub,
+// since the address might be passed to a 32 bit function.
+
+// Section names that look like .mips16.call.FNNAME contain stubs
+// that copy floating point arguments from the gp regs to the fp
+// regs and then jump to FNNAME. If FNNAME is a 32 bit function,
+// then any 16 bit function that calls FNNAME should be redirected
+// to the stub instead. If FNNAME is not a 32 bit function, the
+// stub should be discarded.
+
+// .mips16.call.fp.FNNAME sections are similar, but contain stubs
+// which call FNNAME and then copy the return value from the fp regs
+// to the gp regs. These stubs store the return address in $18 while
+// calling FNNAME; any function which might call one of these stubs
+// must arrange to save $18 around the call. (This case is not
+// needed for 32 bit functions that call 16 bit functions, because
+// 16 bit functions always return floating point values in both
+// $f0/$f1 and $2/$3.)
+
+// Note that in all cases FNNAME might be defined statically.
+// Therefore, FNNAME is not used literally. Instead, the relocation
+// information will indicate which symbol the section is for.
+
+// We record any stubs that we find in the symbol table.
+
+// TODO(sasa): All mips16 stub sections should be emitted in the .text section.
+
+class Mips16_stub_section_base { };
+
+template<int size, bool big_endian>
+class Mips16_stub_section : public Mips16_stub_section_base
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ public:
+ Mips16_stub_section(Mips_relobj<size, big_endian>* object, unsigned int shndx)
+ : object_(object), shndx_(shndx), r_sym_(0), gsym_(NULL),
+ found_r_mips_none_(false)
+ {
+ gold_assert(object->is_mips16_fn_stub_section(shndx)
+ || object->is_mips16_call_stub_section(shndx)
+ || object->is_mips16_call_fp_stub_section(shndx));
+ }
+
+ // Return the object of this stub section.
+ Mips_relobj<size, big_endian>*
+ object() const
+ { return this->object_; }
+
+ // Return the size of a section.
+ uint64_t
+ section_size() const
+ { return this->object_->section_size(this->shndx_); }
+
+ // Return section index of this stub section.
+ unsigned int
+ shndx() const
+ { return this->shndx_; }
+
+ // Return symbol index, if stub is for a local function.
+ unsigned int
+ r_sym() const
+ { return this->r_sym_; }
+
+ // Return symbol, if stub is for a global function.
+ Mips_symbol<size>*
+ gsym() const
+ { return this->gsym_; }
+
+ // Return whether stub is for a local function.
+ bool
+ is_for_local_function() const
+ { return this->gsym_ == NULL; }
+
+ // This method is called when a new relocation R_TYPE for local symbol R_SYM
+ // is found in the stub section. Try to find stub target.
+ void
+ new_local_reloc_found(unsigned int r_type, unsigned int r_sym)
+ {
+ // To find target symbol for this stub, trust the first R_MIPS_NONE
+ // relocation, if any. Otherwise trust the first relocation, whatever
+ // its kind.
+ if (this->found_r_mips_none_)
+ return;
+ if (r_type == elfcpp::R_MIPS_NONE)
+ {
+ this->r_sym_ = r_sym;
+ this->gsym_ = NULL;
+ this->found_r_mips_none_ = true;
+ }
+ else if (!is_target_found())
+ this->r_sym_ = r_sym;
+ }
+
+ // This method is called when a new relocation R_TYPE for global symbol GSYM
+ // is found in the stub section. Try to find stub target.
+ void
+ new_global_reloc_found(unsigned int r_type, Mips_symbol<size>* gsym)
+ {
+ // To find target symbol for this stub, trust the first R_MIPS_NONE
+ // relocation, if any. Otherwise trust the first relocation, whatever
+ // its kind.
+ if (this->found_r_mips_none_)
+ return;
+ if (r_type == elfcpp::R_MIPS_NONE)
+ {
+ this->gsym_ = gsym;
+ this->r_sym_ = 0;
+ this->found_r_mips_none_ = true;
+ }
+ else if (!is_target_found())
+ this->gsym_ = gsym;
+ }
+
+ // Return whether we found the stub target.
+ bool
+ is_target_found() const
+ { return this->r_sym_ != 0 || this->gsym_ != NULL; }
+
+ // Return whether this is a fn stub.
+ bool
+ is_fn_stub() const
+ { return this->object_->is_mips16_fn_stub_section(this->shndx_); }
+
+ // Return whether this is a call stub.
+ bool
+ is_call_stub() const
+ { return this->object_->is_mips16_call_stub_section(this->shndx_); }
+
+ // Return whether this is a call_fp stub.
+ bool
+ is_call_fp_stub() const
+ { return this->object_->is_mips16_call_fp_stub_section(this->shndx_); }
+
+ // Return the output address.
+ Mips_address
+ output_address() const
+ {
+ return (this->object_->output_section(this->shndx_)->address()
+ + this->object_->output_section_offset(this->shndx_));
+ }
+
+ private:
+ // The object of this stub section.
+ Mips_relobj<size, big_endian>* object_;
+ // The section index of this stub section.
+ unsigned int shndx_;
+ // The symbol index, if stub is for a local function.
+ unsigned int r_sym_;
+ // The symbol, if stub is for a global function.
+ Mips_symbol<size>* gsym_;
+ // True if we found R_MIPS_NONE relocation in this stub.
+ bool found_r_mips_none_;
+};
+
+// Mips_relobj class.
+
+template<int size, bool big_endian>
+class Mips_relobj : public Sized_relobj_file<size, big_endian>
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef std::map<unsigned int, Mips16_stub_section<size, big_endian>*>
+ Mips16_stubs_int_map;
+ typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
+
+ public:
+ Mips_relobj(const std::string& name, Input_file* input_file, off_t offset,
+ const typename elfcpp::Ehdr<size, big_endian>& ehdr)
+ : Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr),
+ processor_specific_flags_(0), local_symbol_is_mips16_(),
+ local_symbol_is_micromips_(), mips16_stub_sections_(),
+ local_non_16bit_calls_(), local_16bit_calls_(), local_mips16_fn_stubs_(),
+ local_mips16_call_stubs_(), gp_(0), got_info_(NULL),
+ section_is_mips16_fn_stub_(), section_is_mips16_call_stub_(),
+ section_is_mips16_call_fp_stub_(), pdr_shndx_(-1U), gprmask_(0),
+ cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
+ {
+ this->is_pic_ = (ehdr.get_e_flags() & elfcpp::EF_MIPS_PIC) != 0;
+ this->is_n32_ = elfcpp::abi_n32(ehdr.get_e_flags());
+ this->is_n64_ = elfcpp::abi_64(ehdr.get_e_ident()[elfcpp::EI_CLASS]);
+ }
+
+ ~Mips_relobj()
+ { }
+
+ // Downcast a base pointer to a Mips_relobj pointer. This is
+ // not type-safe but we only use Mips_relobj not the base class.
+ static Mips_relobj<size, big_endian>*
+ as_mips_relobj(Relobj* relobj)
+ { return static_cast<Mips_relobj<size, big_endian>*>(relobj); }
+
+ // Downcast a base pointer to a Mips_relobj pointer. This is
+ // not type-safe but we only use Mips_relobj not the base class.
+ static const Mips_relobj<size, big_endian>*
+ as_mips_relobj(const Relobj* relobj)
+ { return static_cast<const Mips_relobj<size, big_endian>*>(relobj); }
+
+ // Processor-specific flags in ELF file header. This is valid only after
+ // reading symbols.
+ elfcpp::Elf_Word
+ processor_specific_flags() const
+ { return this->processor_specific_flags_; }
+
+ // Whether a local symbol is MIPS16 symbol. R_SYM is the symbol table
+ // index. This is only valid after do_count_local_symbol is called.
+ bool
+ local_symbol_is_mips16(unsigned int r_sym) const
+ {
+ gold_assert(r_sym < this->local_symbol_is_mips16_.size());
+ return this->local_symbol_is_mips16_[r_sym];
+ }
+
+ // Whether a local symbol is microMIPS symbol. R_SYM is the symbol table
+ // index. This is only valid after do_count_local_symbol is called.
+ bool
+ local_symbol_is_micromips(unsigned int r_sym) const
+ {
+ gold_assert(r_sym < this->local_symbol_is_micromips_.size());
+ return this->local_symbol_is_micromips_[r_sym];
+ }
+
+ // Get or create MIPS16 stub section.
+ Mips16_stub_section<size, big_endian>*
+ get_mips16_stub_section(unsigned int shndx)
+ {
+ typename Mips16_stubs_int_map::const_iterator it =
+ this->mips16_stub_sections_.find(shndx);
+ if (it != this->mips16_stub_sections_.end())
+ return (*it).second;
+
+ Mips16_stub_section<size, big_endian>* stub_section =
+ new Mips16_stub_section<size, big_endian>(this, shndx);
+ this->mips16_stub_sections_.insert(
+ std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
+ stub_section->shndx(), stub_section));
+ return stub_section;
+ }
+
+ // Return MIPS16 fn stub section for local symbol R_SYM, or NULL if this
+ // object doesn't have fn stub for R_SYM.
+ Mips16_stub_section<size, big_endian>*
+ get_local_mips16_fn_stub(unsigned int r_sym) const
+ {
+ typename Mips16_stubs_int_map::const_iterator it =
+ this->local_mips16_fn_stubs_.find(r_sym);
+ if (it != this->local_mips16_fn_stubs_.end())
+ return (*it).second;
+ return NULL;
+ }
+
+ // Record that this object has MIPS16 fn stub for local symbol. This method
+ // is only called if we decided not to discard the stub.
+ void
+ add_local_mips16_fn_stub(Mips16_stub_section<size, big_endian>* stub)
+ {
+ gold_assert(stub->is_for_local_function());
+ unsigned int r_sym = stub->r_sym();
+ this->local_mips16_fn_stubs_.insert(
+ std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
+ r_sym, stub));
+ }
+
+ // Return MIPS16 call stub section for local symbol R_SYM, or NULL if this
+ // object doesn't have call stub for R_SYM.
+ Mips16_stub_section<size, big_endian>*
+ get_local_mips16_call_stub(unsigned int r_sym) const
+ {
+ typename Mips16_stubs_int_map::const_iterator it =
+ this->local_mips16_call_stubs_.find(r_sym);
+ if (it != this->local_mips16_call_stubs_.end())
+ return (*it).second;
+ return NULL;
+ }
+
+ // Record that this object has MIPS16 call stub for local symbol. This method
+ // is only called if we decided not to discard the stub.
+ void
+ add_local_mips16_call_stub(Mips16_stub_section<size, big_endian>* stub)
+ {
+ gold_assert(stub->is_for_local_function());
+ unsigned int r_sym = stub->r_sym();
+ this->local_mips16_call_stubs_.insert(
+ std::pair<unsigned int, Mips16_stub_section<size, big_endian>*>(
+ r_sym, stub));
+ }
+
+ // Record that we found "non 16-bit" call relocation against local symbol
+ // SYMNDX. This reloc would need to refer to a MIPS16 fn stub, if there
+ // is one.
+ void
+ add_local_non_16bit_call(unsigned int symndx)
+ { this->local_non_16bit_calls_.insert(symndx); }
+
+ // Return true if there is any "non 16-bit" call relocation against local
+ // symbol SYMNDX in this object.
+ bool
+ has_local_non_16bit_call_relocs(unsigned int symndx)
+ {
+ return (this->local_non_16bit_calls_.find(symndx)
+ != this->local_non_16bit_calls_.end());
+ }
+
+ // Record that we found 16-bit call relocation R_MIPS16_26 against local
+ // symbol SYMNDX. Local MIPS16 call or call_fp stubs will only be needed
+ // if there is some R_MIPS16_26 relocation that refers to the stub symbol.
+ void
+ add_local_16bit_call(unsigned int symndx)
+ { this->local_16bit_calls_.insert(symndx); }
+
+ // Return true if there is any 16-bit call relocation R_MIPS16_26 against local
+ // symbol SYMNDX in this object.
+ bool
+ has_local_16bit_call_relocs(unsigned int symndx)
+ {
+ return (this->local_16bit_calls_.find(symndx)
+ != this->local_16bit_calls_.end());
+ }
+
+ // Get gp value that was used to create this object.
+ Mips_address
+ gp_value() const
+ { return this->gp_; }
+
+ // Return whether the object is a PIC object.
+ bool
+ is_pic() const
+ { return this->is_pic_; }
+
+ // Return whether the object uses N32 ABI.
+ bool
+ is_n32() const
+ { return this->is_n32_; }
+
+ // Return whether the object uses N64 ABI.
+ bool
+ is_n64() const
+ { return this->is_n64_; }
+
+ // Return whether the object uses NewABI conventions.
+ bool
+ is_newabi() const
+ { return this->is_n32_ || this->is_n64_; }
+
+ // Return Mips_got_info for this object.
+ Mips_got_info<size, big_endian>*
+ get_got_info() const
+ { return this->got_info_; }
+
+ // Return Mips_got_info for this object. Create new info if it doesn't exist.
+ Mips_got_info<size, big_endian>*
+ get_or_create_got_info()
+ {
+ if (!this->got_info_)
+ this->got_info_ = new Mips_got_info<size, big_endian>();
+ return this->got_info_;
+ }
+
+ // Set Mips_got_info for this object.
+ void
+ set_got_info(Mips_got_info<size, big_endian>* got_info)
+ { this->got_info_ = got_info; }
+
+ // Whether a section SHDNX is a MIPS16 stub section. This is only valid
+ // after do_read_symbols is called.
+ bool
+ is_mips16_stub_section(unsigned int shndx)
+ {
+ return (is_mips16_fn_stub_section(shndx)
+ || is_mips16_call_stub_section(shndx)
+ || is_mips16_call_fp_stub_section(shndx));
+ }
+
+ // Return TRUE if relocations in section SHNDX can refer directly to a
+ // MIPS16 function rather than to a hard-float stub. This is only valid
+ // after do_read_symbols is called.
+ bool
+ section_allows_mips16_refs(unsigned int shndx)
+ {
+ return (this->is_mips16_stub_section(shndx) || shndx == this->pdr_shndx_);
+ }
+
+ // Whether a section SHDNX is a MIPS16 fn stub section. This is only valid
+ // after do_read_symbols is called.
+ bool
+ is_mips16_fn_stub_section(unsigned int shndx)
+ {
+ gold_assert(shndx < this->section_is_mips16_fn_stub_.size());
+ return this->section_is_mips16_fn_stub_[shndx];
+ }
+
+ // Whether a section SHDNX is a MIPS16 call stub section. This is only valid
+ // after do_read_symbols is called.
+ bool
+ is_mips16_call_stub_section(unsigned int shndx)
+ {
+ gold_assert(shndx < this->section_is_mips16_call_stub_.size());
+ return this->section_is_mips16_call_stub_[shndx];
+ }
+
+ // Whether a section SHDNX is a MIPS16 call_fp stub section. This is only
+ // valid after do_read_symbols is called.
+ bool
+ is_mips16_call_fp_stub_section(unsigned int shndx)
+ {
+ gold_assert(shndx < this->section_is_mips16_call_fp_stub_.size());
+ return this->section_is_mips16_call_fp_stub_[shndx];
+ }
+
+ // Discard MIPS16 stub secions that are not needed.
+ void
+ discard_mips16_stub_sections(Symbol_table* symtab);
+
+ // Return gprmask from the .reginfo section of this object.
+ Valtype
+ gprmask() const
+ { return this->gprmask_; }
+
+ // Return cprmask1 from the .reginfo section of this object.
+ Valtype
+ cprmask1() const
+ { return this->cprmask1_; }
+
+ // Return cprmask2 from the .reginfo section of this object.
+ Valtype
+ cprmask2() const
+ { return this->cprmask2_; }
+
+ // Return cprmask3 from the .reginfo section of this object.
+ Valtype
+ cprmask3() const
+ { return this->cprmask3_; }
+
+ // Return cprmask4 from the .reginfo section of this object.
+ Valtype
+ cprmask4() const
+ { return this->cprmask4_; }
+
+ protected:
+ // Count the local symbols.
+ void
+ do_count_local_symbols(Stringpool_template<char>*,
+ Stringpool_template<char>*);
+
+ // Read the symbol information.
+ void
+ do_read_symbols(Read_symbols_data* sd);
+
+ private:
+ // processor-specific flags in ELF file header.
+ elfcpp::Elf_Word processor_specific_flags_;
+
+ // Bit vector to tell if a local symbol is a MIPS16 symbol or not.
+ // This is only valid after do_count_local_symbol is called.
+ std::vector<bool> local_symbol_is_mips16_;
+
+ // Bit vector to tell if a local symbol is a microMIPS symbol or not.
+ // This is only valid after do_count_local_symbol is called.
+ std::vector<bool> local_symbol_is_micromips_;
+
+ // Map from section index to the MIPS16 stub for that section. This contains
+ // all stubs found in this object.
+ Mips16_stubs_int_map mips16_stub_sections_;
+
+ // Local symbols that have "non 16-bit" call relocation. This relocation
+ // would need to refer to a MIPS16 fn stub, if there is one.
+ std::set<unsigned int> local_non_16bit_calls_;
+
+ // Local symbols that have 16-bit call relocation R_MIPS16_26. Local MIPS16
+ // call or call_fp stubs will only be needed if there is some R_MIPS16_26
+ // relocation that refers to the stub symbol.
+ std::set<unsigned int> local_16bit_calls_;
+
+ // Map from local symbol index to the MIPS16 fn stub for that symbol.
+ // This contains only the stubs that we decided not to discard.
+ Mips16_stubs_int_map local_mips16_fn_stubs_;
+
+ // Map from local symbol index to the MIPS16 call stub for that symbol.
+ // This contains only the stubs that we decided not to discard.
+ Mips16_stubs_int_map local_mips16_call_stubs_;
+
+ // gp value that was used to create this object.
+ Mips_address gp_;
+ // Whether the object is a PIC object.
+ bool is_pic_ : 1;
+ // Whether the object uses N32 ABI.
+ bool is_n32_ : 1;
+ // Whether the object uses N64 ABI.
+ bool is_n64_ : 1;
+ // The Mips_got_info for this object.
+ Mips_got_info<size, big_endian>* got_info_;
+
+ // Bit vector to tell if a section is a MIPS16 fn stub section or not.
+ // This is only valid after do_read_symbols is called.
+ std::vector<bool> section_is_mips16_fn_stub_;
+
+ // Bit vector to tell if a section is a MIPS16 call stub section or not.
+ // This is only valid after do_read_symbols is called.
+ std::vector<bool> section_is_mips16_call_stub_;
+
+ // Bit vector to tell if a section is a MIPS16 call_fp stub section or not.
+ // This is only valid after do_read_symbols is called.
+ std::vector<bool> section_is_mips16_call_fp_stub_;
+
+ // .pdr section index.
+ unsigned int pdr_shndx_;
+
+ // gprmask from the .reginfo section of this object.
+ Valtype gprmask_;
+ // cprmask1 from the .reginfo section of this object.
+ Valtype cprmask1_;
+ // cprmask2 from the .reginfo section of this object.
+ Valtype cprmask2_;
+ // cprmask3 from the .reginfo section of this object.
+ Valtype cprmask3_;
+ // cprmask4 from the .reginfo section of this object.
+ Valtype cprmask4_;
+};
+
+// Mips_output_data_got class.
+
+template<int size, bool big_endian>
+class Mips_output_data_got : public Output_data_got<size, big_endian>
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
+ Reloc_section;
+ typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
+
+ public:
+ Mips_output_data_got(Target_mips<size, big_endian>* target,
+ Symbol_table* symtab, Layout* layout)
+ : Output_data_got<size, big_endian>(), target_(target),
+ symbol_table_(symtab), layout_(layout), static_relocs_(), got_view_(NULL),
+ first_global_got_dynsym_index_(-1U), primary_got_(NULL),
+ secondary_got_relocs_()
+ {
+ this->master_got_info_ = new Mips_got_info<size, big_endian>();
+ this->set_addralign(16);
+ }
+
+ // Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
+ // SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
+ void
+ record_local_got_symbol(Mips_relobj<size, big_endian>* object,
+ unsigned int symndx, Mips_address addend,
+ unsigned int r_type, unsigned int shndx)
+ {
+ this->master_got_info_->record_local_got_symbol(object, symndx, addend,
+ r_type, shndx);
+ }
+
+ // Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
+ // in OBJECT. FOR_CALL is true if the caller is only interested in
+ // using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
+ // relocation.
+ void
+ record_global_got_symbol(Mips_symbol<size>* mips_sym,
+ Mips_relobj<size, big_endian>* object,
+ unsigned int r_type, bool dyn_reloc, bool for_call)
+ {
+ this->master_got_info_->record_global_got_symbol(mips_sym, object, r_type,
+ dyn_reloc, for_call);
+ }
+
+ // Record that OBJECT has a page relocation against symbol SYMNDX and
+ // that ADDEND is the addend for that relocation.
+ void
+ record_got_page_entry(Mips_relobj<size, big_endian>* object,
+ unsigned int symndx, int addend)
+ { this->master_got_info_->record_got_page_entry(object, symndx, addend); }
+
+ // Add a static entry for the GOT entry at OFFSET. GSYM is a global
+ // symbol and R_TYPE is the code of a dynamic relocation that needs to be
+ // applied in a static link.
+ void
+ add_static_reloc(unsigned int got_offset, unsigned int r_type,
+ Mips_symbol<size>* gsym)
+ { this->static_relocs_.push_back(Static_reloc(got_offset, r_type, gsym)); }
+
+ // Add a static reloc for the GOT entry at OFFSET. RELOBJ is an object
+ // defining a local symbol with INDEX. R_TYPE is the code of a dynamic
+ // relocation that needs to be applied in a static link.
+ void
+ add_static_reloc(unsigned int got_offset, unsigned int r_type,
+ Sized_relobj_file<size, big_endian>* relobj,
+ unsigned int index)
+ {
+ this->static_relocs_.push_back(Static_reloc(got_offset, r_type, relobj,
+ index));
+ }
+
+ // Record that global symbol GSYM has R_TYPE dynamic relocation in the
+ // secondary GOT at OFFSET.
+ void
+ add_secondary_got_reloc(unsigned int got_offset, unsigned int r_type,
+ Mips_symbol<size>* gsym)
+ {
+ this->secondary_got_relocs_.push_back(Static_reloc(got_offset,
+ r_type, gsym));
+ }
+
+ // Update GOT entry at OFFSET with VALUE.
+ void
+ update_got_entry(unsigned int offset, Mips_address value)
+ {
+ elfcpp::Swap<size, big_endian>::writeval(this->got_view_ + offset, value);
+ }
+
+ // Return the number of entries in local part of the GOT. This includes
+ // local entries, page entries and 2 reserved entries.
+ unsigned int
+ get_local_gotno() const
+ {
+ if (!this->multi_got())
+ {
+ return (2 + this->master_got_info_->local_gotno()
+ + this->master_got_info_->page_gotno());
+ }
+ else
+ return 2 + this->primary_got_->local_gotno() + this->primary_got_->page_gotno();
+ }
+
+ // Return dynamic symbol table index of the first symbol with global GOT
+ // entry.
+ unsigned int
+ first_global_got_dynsym_index() const
+ { return this->first_global_got_dynsym_index_; }
+
+ // Set dynamic symbol table index of the first symbol with global GOT entry.
+ void
+ set_first_global_got_dynsym_index(unsigned int index)
+ { this->first_global_got_dynsym_index_ = index; }
+
+ // Lay out the GOT. Add local, global and TLS entries. If GOT is
+ // larger than 64K, create multi-GOT.
+ void
+ lay_out_got(Layout* layout, Symbol_table* symtab,
+ const Input_objects* input_objects);
+
+ // Create multi-GOT. For every GOT, add local, global and TLS entries.
+ void
+ lay_out_multi_got(Layout* layout, const Input_objects* input_objects);
+
+ // Attempt to merge GOTs of different input objects.
+ void
+ merge_gots(const Input_objects* input_objects);
+
+ // Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
+ // this would lead to overflow, true if they were merged successfully.
+ bool
+ merge_got_with(Mips_got_info<size, big_endian>* from,
+ Mips_relobj<size, big_endian>* object,
+ Mips_got_info<size, big_endian>* to);
+
+ // Return the offset of GOT page entry for VALUE. For multi-GOT links,
+ // use OBJECT's GOT.
+ unsigned int
+ get_got_page_offset(Mips_address value,
+ const Mips_relobj<size, big_endian>* object)
+ {
+ Mips_got_info<size, big_endian>* g = (!this->multi_got()
+ ? this->master_got_info_
+ : object->get_got_info());
+ gold_assert(g != NULL);
+ return g->get_got_page_offset(value, this);
+ }
+
+ // Return the GOT offset of type GOT_TYPE of the global symbol
+ // GSYM. For multi-GOT links, use OBJECT's GOT.
+ unsigned int got_offset(const Symbol* gsym, unsigned int got_type,
+ Mips_relobj<size, big_endian>* object) const
+ {
+ if (!this->multi_got())
+ return gsym->got_offset(got_type);
+ else
+ {
+ Mips_got_info<size, big_endian>* g = object->get_got_info();
+ gold_assert(g != NULL);
+ return gsym->got_offset(g->multigot_got_type(got_type));
+ }
+ }
+
+ // Return the GOT offset of type GOT_TYPE of the local symbol
+ // SYMNDX.
+ unsigned int
+ got_offset(unsigned int symndx, unsigned int got_type,
+ Sized_relobj_file<size, big_endian>* object) const
+ { return object->local_got_offset(symndx, got_type); }
+
+ // Return the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
+ unsigned int
+ tls_ldm_offset(Mips_relobj<size, big_endian>* object) const
+ {
+ Mips_got_info<size, big_endian>* g = (!this->multi_got()
+ ? this->master_got_info_
+ : object->get_got_info());
+ gold_assert(g != NULL);
+ return g->tls_ldm_offset();
+ }
+
+ // Set the offset of TLS LDM entry. For multi-GOT links, use OBJECT's GOT.
+ void
+ set_tls_ldm_offset(unsigned int tls_ldm_offset,
+ Mips_relobj<size, big_endian>* object)
+ {
+ Mips_got_info<size, big_endian>* g = (!this->multi_got()
+ ? this->master_got_info_
+ : object->get_got_info());
+ gold_assert(g != NULL);
+ g->set_tls_ldm_offset(tls_ldm_offset);
+ }
+
+ // Return true for multi-GOT links.
+ bool
+ multi_got() const
+ { return this->primary_got_ != NULL; }
+
+ // Return the offset of OBJECT's GOT from the start of .got section.
+ unsigned int
+ get_got_offset(const Mips_relobj<size, big_endian>* object)
+ {
+ if (!this->multi_got())
+ return 0;
+ else
+ {
+ Mips_got_info<size, big_endian>* g = object->get_got_info();
+ return g != NULL ? g->offset() : 0;
+ }
+ }
+
+ // Create global GOT entries that should be in the GGA_RELOC_ONLY area.
+ void
+ add_reloc_only_entries()
+ { this->master_got_info_->add_reloc_only_entries(this); }
+
+ // Return offset of the primary GOT's entry for global symbol.
+ unsigned int
+ get_primary_got_offset(const Mips_symbol<size>* sym) const
+ {
+ gold_assert(sym->global_got_area() != GGA_NONE);
+ return (this->get_local_gotno() + sym->dynsym_index()
+ - this->first_global_got_dynsym_index()) * size/8;
+ }
+
+ // For the entry at offset GOT_OFFSET, return its offset from the gp.
+ // Input argument GOT_OFFSET is always global offset from the start of
+ // .got section, for both single and multi-GOT links.
+ // For single GOT links, this returns GOT_OFFSET - 0x7FF0. For multi-GOT
+ // links, the return value is object_got_offset - 0x7FF0, where
+ // object_got_offset is offset in the OBJECT's GOT.
+ int
+ gp_offset(unsigned int got_offset,
+ const Mips_relobj<size, big_endian>* object) const
+ {
+ return (this->address() + got_offset
+ - this->target_->adjusted_gp_value(object));
+ }
+
+ protected:
+ // Write out the GOT table.
+ void
+ do_write(Output_file*);
+
+ private:
+
+ // This class represent dynamic relocations that need to be applied by
+ // gold because we are using TLS relocations in a static link.
+ class Static_reloc
+ {
+ public:
+ Static_reloc(unsigned int got_offset, unsigned int r_type,
+ Mips_symbol<size>* gsym)
+ : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(true)
+ { this->u_.global.symbol = gsym; }
+
+ Static_reloc(unsigned int got_offset, unsigned int r_type,
+ Sized_relobj_file<size, big_endian>* relobj, unsigned int index)
+ : got_offset_(got_offset), r_type_(r_type), symbol_is_global_(false)
+ {
+ this->u_.local.relobj = relobj;
+ this->u_.local.index = index;
+ }
+
+ // Return the GOT offset.
+ unsigned int
+ got_offset() const
+ { return this->got_offset_; }
+
+ // Relocation type.
+ unsigned int
+ r_type() const
+ { return this->r_type_; }
+
+ // Whether the symbol is global or not.
+ bool
+ symbol_is_global() const
+ { return this->symbol_is_global_; }
+
+ // For a relocation against a global symbol, the global symbol.
+ Mips_symbol<size>*
+ symbol() const
+ {
+ gold_assert(this->symbol_is_global_);
+ return this->u_.global.symbol;
+ }
+
+ // For a relocation against a local symbol, the defining object.
+ Sized_relobj_file<size, big_endian>*
+ relobj() const
+ {
+ gold_assert(!this->symbol_is_global_);
+ return this->u_.local.relobj;
+ }
+
+ // For a relocation against a local symbol, the local symbol index.
+ unsigned int
+ index() const
+ {
+ gold_assert(!this->symbol_is_global_);
+ return this->u_.local.index;
+ }
+
+ private:
+ // GOT offset of the entry to which this relocation is applied.
+ unsigned int got_offset_;
+ // Type of relocation.
+ unsigned int r_type_;
+ // Whether this relocation is against a global symbol.
+ bool symbol_is_global_;
+ // A global or local symbol.
+ union
+ {
+ struct
+ {
+ // For a global symbol, the symbol itself.
+ Mips_symbol<size>* symbol;
+ } global;
+ struct
+ {
+ // For a local symbol, the object defining object.
+ Sized_relobj_file<size, big_endian>* relobj;
+ // For a local symbol, the symbol index.
+ unsigned int index;
+ } local;
+ } u_;
+ };
+
+ // The target.
+ Target_mips<size, big_endian>* target_;
+ // The symbol table.
+ Symbol_table* symbol_table_;
+ // The layout.
+ Layout* layout_;
+ // Static relocs to be applied to the GOT.
+ std::vector<Static_reloc> static_relocs_;
+ // .got section view.
+ unsigned char* got_view_;
+ // The dynamic symbol table index of the first symbol with global GOT entry.
+ unsigned int first_global_got_dynsym_index_;
+ // The master GOT information.
+ Mips_got_info<size, big_endian>* master_got_info_;
+ // The primary GOT information.
+ Mips_got_info<size, big_endian>* primary_got_;
+ // Secondary GOT fixups.
+ std::vector<Static_reloc> secondary_got_relocs_;
+};
+
+// A class to handle LA25 stubs - non-PIC interface to a PIC function. There are
+// two ways of creating these interfaces. The first is to add:
+//
+// lui $25,%hi(func)
+// j func
+// addiu $25,$25,%lo(func)
+//
+// to a separate trampoline section. The second is to add:
+//
+// lui $25,%hi(func)
+// addiu $25,$25,%lo(func)
+//
+// immediately before a PIC function "func", but only if a function is at the
+// beginning of the section, and the section is not too heavily aligned (i.e we
+// would need to add no more than 2 nops before the stub.)
+//
+// We only create stubs of the first type.
+
+template<int size, bool big_endian>
+class Mips_output_data_la25_stub : public Output_section_data
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ public:
+ Mips_output_data_la25_stub()
+ : Output_section_data(size == 32 ? 4 : 8), symbols_()
+ { }
+
+ // Create LA25 stub for a symbol.
+ void
+ create_la25_stub(Symbol_table* symtab, Target_mips<size, big_endian>* target,
+ Mips_symbol<size>* gsym);
+
+ // Return output address of a stub.
+ Mips_address
+ stub_address(const Mips_symbol<size>* sym) const
+ {
+ gold_assert(sym->has_la25_stub());
+ return this->address() + sym->la25_stub_offset();
+ }
+
+ protected:
+ void
+ do_adjust_output_section(Output_section* os)
+ { os->set_entsize(0); }
+
+ private:
+ // Template for standard LA25 stub.
+ static const uint32_t la25_stub_entry[];
+ // Template for microMIPS LA25 stub.
+ static const uint32_t la25_stub_micromips_entry[];
+
+ // Set the final size.
+ void
+ set_final_data_size()
+ { this->set_data_size(this->symbols_.size() * 16); }
+
+ // Create a symbol for SYM stub's value and size, to help make the
+ // disassembly easier to read.
+ void
+ create_stub_symbol(Mips_symbol<size>* sym, Symbol_table* symtab,
+ Target_mips<size, big_endian>* target, uint64_t symsize);
+
+ // Write out the LA25 stub section.
+ void
+ do_write(Output_file*);
+
+ // Symbols that have LA25 stubs.
+ Unordered_set<Mips_symbol<size>*> symbols_;
+};
+
+// A class to handle the PLT data.
+
+template<int size, bool big_endian>
+class Mips_output_data_plt : public Output_section_data
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef Output_data_reloc<elfcpp::SHT_REL, true,
+ size, big_endian> Reloc_section;
+
+ public:
+ // Create the PLT section. The ordinary .got section is an argument,
+ // since we need to refer to the start.
+ Mips_output_data_plt(Layout* layout, Output_data_space* got_plt,
+ Target_mips<size, big_endian>* target)
+ : Output_section_data(size == 32 ? 4 : 8), got_plt_(got_plt), symbols_(),
+ plt_mips_offset_(0), plt_comp_offset_(0), plt_header_size_(0),
+ target_(target)
+ {
+ this->rel_ = new Reloc_section(false);
+ layout->add_output_section_data(".rel.plt", elfcpp::SHT_REL,
+ elfcpp::SHF_ALLOC, this->rel_,
+ ORDER_DYNAMIC_PLT_RELOCS, false);
+ }
+
+ // Add an entry to the PLT for a symbol referenced by r_type relocation.
+ void
+ add_entry(Mips_symbol<size>* gsym, unsigned int r_type);
+
+ // Return the .rel.plt section data.
+ const Reloc_section*
+ rel_plt() const
+ { return this->rel_; }
+
+ // Return the number of PLT entries.
+ unsigned int
+ entry_count() const
+ { return this->symbols_.size(); }
+
+ // Return the offset of the first non-reserved PLT entry.
+ unsigned int
+ first_plt_entry_offset() const
+ { return sizeof(plt0_entry_o32); }
+
+ // Return the size of a PLT entry.
+ unsigned int
+ plt_entry_size() const
+ { return sizeof(plt_entry); }
+
+ // Set final PLT offsets. For each symbol, determine whether standard or
+ // compressed (MIPS16 or microMIPS) PLT entry is used.
+ void
+ set_plt_offsets();
+
+ // Return the offset of the first standard PLT entry.
+ unsigned int
+ first_mips_plt_offset() const
+ { return this->plt_header_size_; }
+
+ // Return the offset of the first compressed PLT entry.
+ unsigned int
+ first_comp_plt_offset() const
+ { return this->plt_header_size_ + this->plt_mips_offset_; }
+
+ // Return whether there are any standard PLT entries.
+ bool
+ has_standard_entries() const
+ { return this->plt_mips_offset_ > 0; }
+
+ // Return the output address of standard PLT entry.
+ Mips_address
+ mips_entry_address(const Mips_symbol<size>* sym) const
+ {
+ gold_assert (sym->has_mips_plt_offset());
+ return (this->address() + this->first_mips_plt_offset()
+ + sym->mips_plt_offset());
+ }
+
+ // Return the output address of compressed (MIPS16 or microMIPS) PLT entry.
+ Mips_address
+ comp_entry_address(const Mips_symbol<size>* sym) const
+ {
+ gold_assert (sym->has_comp_plt_offset());
+ return (this->address() + this->first_comp_plt_offset()
+ + sym->comp_plt_offset());
+ }
+
+ protected:
+ void
+ do_adjust_output_section(Output_section* os)
+ { os->set_entsize(0); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _(".plt")); }
+
+ private:
+ // Template for the first PLT entry.
+ static const uint32_t plt0_entry_o32[];
+ static const uint32_t plt0_entry_n32[];
+ static const uint32_t plt0_entry_n64[];
+ static const uint32_t plt0_entry_micromips_o32[];
+ static const uint32_t plt0_entry_micromips32_o32[];
+
+ // Template for subsequent PLT entries.
+ static const uint32_t plt_entry[];
+ static const uint32_t plt_entry_mips16_o32[];
+ static const uint32_t plt_entry_micromips_o32[];
+ static const uint32_t plt_entry_micromips32_o32[];
+
+ // Set the final size.
+ void
+ set_final_data_size()
+ {
+ this->set_data_size(this->plt_header_size_ + this->plt_mips_offset_
+ + this->plt_comp_offset_);
+ }
+
+ // Write out the PLT data.
+ void
+ do_write(Output_file*);
+
+ // Return whether the plt header contains microMIPS code. For the sake of
+ // cache alignment always use a standard header whenever any standard entries
+ // are present even if microMIPS entries are present as well. This also lets
+ // the microMIPS header rely on the value of $v0 only set by microMIPS
+ // entries, for a small size reduction.
+ bool
+ is_plt_header_compressed() const
+ {
+ gold_assert(this->plt_mips_offset_ + this->plt_comp_offset_ != 0);
+ return this->target_->is_output_micromips() && this->plt_mips_offset_ == 0;
+ }
+
+ // Return the size of the PLT header.
+ unsigned int
+ get_plt_header_size() const
+ {
+ if (this->target_->is_output_n64())
+ return 4 * sizeof(plt0_entry_n64) / sizeof(plt0_entry_n64[0]);
+ else if (this->target_->is_output_n32())
+ return 4 * sizeof(plt0_entry_n32) / sizeof(plt0_entry_n32[0]);
+ else if (!this->is_plt_header_compressed())
+ return 4 * sizeof(plt0_entry_o32) / sizeof(plt0_entry_o32[0]);
+ else if (this->target_->use_32bit_micromips_instructions())
+ return (2 * sizeof(plt0_entry_micromips32_o32)
+ / sizeof(plt0_entry_micromips32_o32[0]));
+ else
+ return (2 * sizeof(plt0_entry_micromips_o32)
+ / sizeof(plt0_entry_micromips_o32[0]));
+ }
+
+ // Return the PLT header entry.
+ const uint32_t*
+ get_plt_header_entry() const
+ {
+ if (this->target_->is_output_n64())
+ return plt0_entry_n64;
+ else if (this->target_->is_output_n32())
+ return plt0_entry_n32;
+ else if (!this->is_plt_header_compressed())
+ return plt0_entry_o32;
+ else if (this->target_->use_32bit_micromips_instructions())
+ return plt0_entry_micromips32_o32;
+ else
+ return plt0_entry_micromips_o32;
+ }
+
+ // Return the size of the standard PLT entry.
+ unsigned int
+ standard_plt_entry_size() const
+ { return 4 * sizeof(plt_entry) / sizeof(plt_entry[0]); }
+
+ // Return the size of the compressed PLT entry.
+ unsigned int
+ compressed_plt_entry_size() const
+ {
+ gold_assert(!this->target_->is_output_newabi());
+
+ if (!this->target_->is_output_micromips())
+ return (2 * sizeof(plt_entry_mips16_o32)
+ / sizeof(plt_entry_mips16_o32[0]));
+ else if (this->target_->use_32bit_micromips_instructions())
+ return (2 * sizeof(plt_entry_micromips32_o32)
+ / sizeof(plt_entry_micromips32_o32[0]));
+ else
+ return (2 * sizeof(plt_entry_micromips_o32)
+ / sizeof(plt_entry_micromips_o32[0]));
+ }
+
+ // The reloc section.
+ Reloc_section* rel_;
+ // The .got.plt section.
+ Output_data_space* got_plt_;
+ // Symbols that have PLT entry.
+ std::vector<Mips_symbol<size>*> symbols_;
+ // The offset of the next standard PLT entry to create.
+ unsigned int plt_mips_offset_;
+ // The offset of the next compressed PLT entry to create.
+ unsigned int plt_comp_offset_;
+ // The size of the PLT header in bytes.
+ unsigned int plt_header_size_;
+ // The target.
+ Target_mips<size, big_endian>* target_;
+};
+
+// A class to handle the .MIPS.stubs data.
+
+template<int size, bool big_endian>
+class Mips_output_data_mips_stubs : public Output_section_data
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ public:
+ Mips_output_data_mips_stubs(Target_mips<size, big_endian>* target)
+ : Output_section_data(size == 32 ? 4 : 8), symbols_(), dynsym_count_(-1U),
+ stub_offsets_are_set_(false), target_(target)
+ { }
+
+ // Create entry for a symbol.
+ void
+ make_entry(Mips_symbol<size>*);
+
+ // Remove entry for a symbol.
+ void
+ remove_entry(Mips_symbol<size>* gsym);
+
+ // Set stub offsets for symbols. This method expects that the number of
+ // entries in dynamic symbol table is set.
+ void
+ set_lazy_stub_offsets();
+
+ void
+ set_needs_dynsym_value();
+
+ // Set the number of entries in dynamic symbol table.
+ void
+ set_dynsym_count(unsigned int dynsym_count)
+ { this->dynsym_count_ = dynsym_count; }
+
+ // Return maximum size of the stub, ie. the stub size if the dynamic symbol
+ // count is greater than 0x10000. If the dynamic symbol count is less than
+ // 0x10000, the stub will be 4 bytes smaller.
+ // There's no disadvantage from using microMIPS code here, so for the sake of
+ // pure-microMIPS binaries we prefer it whenever there's any microMIPS code in
+ // output produced at all. This has a benefit of stubs being shorter by
+ // 4 bytes each too, unless in the insn32 mode.
+ unsigned int
+ stub_max_size() const
+ {
+ if (!this->target_->is_output_micromips()
+ || this->target_->use_32bit_micromips_instructions())
+ return 20;
+ else
+ return 16;
+ }
+
+ // Return the size of the stub. This method expects that the final dynsym
+ // count is set.
+ unsigned int
+ stub_size() const
+ {
+ gold_assert(this->dynsym_count_ != -1U);
+ if (this->dynsym_count_ > 0x10000)
+ return this->stub_max_size();
+ else
+ return this->stub_max_size() - 4;
+ }
+
+ // Return output address of a stub.
+ Mips_address
+ stub_address(const Mips_symbol<size>* sym) const
+ {
+ gold_assert(sym->has_lazy_stub());
+ return this->address() + sym->lazy_stub_offset();
+ }
+
+ protected:
+ void
+ do_adjust_output_section(Output_section* os)
+ { os->set_entsize(0); }
+
+ // Write to a map file.
+ void
+ do_print_to_mapfile(Mapfile* mapfile) const
+ { mapfile->print_output_data(this, _(".MIPS.stubs")); }
+
+ private:
+ static const uint32_t lazy_stub_normal_1[];
+ static const uint32_t lazy_stub_normal_1_n64[];
+ static const uint32_t lazy_stub_normal_2[];
+ static const uint32_t lazy_stub_normal_2_n64[];
+ static const uint32_t lazy_stub_big[];
+ static const uint32_t lazy_stub_big_n64[];
+
+ static const uint32_t lazy_stub_micromips_normal_1[];
+ static const uint32_t lazy_stub_micromips_normal_1_n64[];
+ static const uint32_t lazy_stub_micromips_normal_2[];
+ static const uint32_t lazy_stub_micromips_normal_2_n64[];
+ static const uint32_t lazy_stub_micromips_big[];
+ static const uint32_t lazy_stub_micromips_big_n64[];
+
+ static const uint32_t lazy_stub_micromips32_normal_1[];
+ static const uint32_t lazy_stub_micromips32_normal_1_n64[];
+ static const uint32_t lazy_stub_micromips32_normal_2[];
+ static const uint32_t lazy_stub_micromips32_normal_2_n64[];
+ static const uint32_t lazy_stub_micromips32_big[];
+ static const uint32_t lazy_stub_micromips32_big_n64[];
+
+ // Set the final size.
+ void
+ set_final_data_size()
+ { this->set_data_size(this->symbols_.size() * this->stub_max_size()); }
+
+ // Write out the .MIPS.stubs data.
+ void
+ do_write(Output_file*);
+
+ // .MIPS.stubs symbols
+ Unordered_set<Mips_symbol<size>*> symbols_;
+ // Number of entries in dynamic symbol table.
+ unsigned int dynsym_count_;
+ // Whether the stub offsets are set.
+ bool stub_offsets_are_set_;
+ // The target.
+ Target_mips<size, big_endian>* target_;
+};
+
+// This class handles Mips .reginfo output section.
+
+template<int size, bool big_endian>
+class Mips_output_section_reginfo : public Output_section
+{
+ typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
+
+ public:
+ Mips_output_section_reginfo(const char* name, elfcpp::Elf_Word type,
+ elfcpp::Elf_Xword flags,
+ Target_mips<size, big_endian>* target)
+ : Output_section(name, type, flags), target_(target), gprmask_(0),
+ cprmask1_(0), cprmask2_(0), cprmask3_(0), cprmask4_(0)
+ { }
+
+ // Downcast a base pointer to a Mips_output_section_reginfo pointer.
+ static Mips_output_section_reginfo<size, big_endian>*
+ as_mips_output_section_reginfo(Output_section* os)
+ { return static_cast<Mips_output_section_reginfo<size, big_endian>*>(os); }
+
+ // Set masks of the output .reginfo section.
+ void
+ set_masks(Valtype gprmask, Valtype cprmask1, Valtype cprmask2,
+ Valtype cprmask3, Valtype cprmask4)
+ {
+ this->gprmask_ = gprmask;
+ this->cprmask1_ = cprmask1;
+ this->cprmask2_ = cprmask2;
+ this->cprmask3_ = cprmask3;
+ this->cprmask4_ = cprmask4;
+ }
+
+ protected:
+ // Set the final data size.
+ void
+ set_final_data_size()
+ { this->set_data_size(24); }
+
+ // Write out reginfo section.
+ void
+ do_write(Output_file* of);
+
+ private:
+ Target_mips<size, big_endian>* target_;
+
+ // gprmask of the output .reginfo section.
+ Valtype gprmask_;
+ // cprmask1 of the output .reginfo section.
+ Valtype cprmask1_;
+ // cprmask2 of the output .reginfo section.
+ Valtype cprmask2_;
+ // cprmask3 of the output .reginfo section.
+ Valtype cprmask3_;
+ // cprmask4 of the output .reginfo section.
+ Valtype cprmask4_;
+};
+
+// The MIPS target has relocation types which default handling of relocatable
+// relocation cannot process. So we have to extend the default code.
+
+template<bool big_endian, int sh_type, typename Classify_reloc>
+class Mips_scan_relocatable_relocs :
+ public Default_scan_relocatable_relocs<sh_type, Classify_reloc>
+{
+ public:
+ // Return the strategy to use for a local symbol which is a section
+ // symbol, given the relocation type.
+ inline Relocatable_relocs::Reloc_strategy
+ local_section_strategy(unsigned int r_type, Relobj* object)
+ {
+ if (sh_type == elfcpp::SHT_RELA)
+ return Relocatable_relocs::RELOC_ADJUST_FOR_SECTION_RELA;
+ else
+ {
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_26:
+ return Relocatable_relocs::RELOC_SPECIAL;
+
+ default:
+ return Default_scan_relocatable_relocs<sh_type, Classify_reloc>::
+ local_section_strategy(r_type, object);
+ }
+ }
+ }
+};
+
+// Mips_copy_relocs class. The only difference from the base class is the
+// method emit_mips, which should be called instead of Copy_reloc_entry::emit.
+// Mips cannot convert all relocation types to dynamic relocs. If a reloc
+// cannot be made dynamic, a COPY reloc is emitted.
+
+template<int sh_type, int size, bool big_endian>
+class Mips_copy_relocs : public Copy_relocs<sh_type, size, big_endian>
+{
+ public:
+ Mips_copy_relocs()
+ : Copy_relocs<sh_type, size, big_endian>(elfcpp::R_MIPS_COPY)
+ { }
+
+ // Emit any saved relocations which turn out to be needed. This is
+ // called after all the relocs have been scanned.
+ void
+ emit_mips(Output_data_reloc<sh_type, true, size, big_endian>*,
+ Symbol_table*, Layout*, Target_mips<size, big_endian>*);
+
+ private:
+ typedef typename Copy_relocs<sh_type, size, big_endian>::Copy_reloc_entry
+ Copy_reloc_entry;
+
+ // Emit this reloc if appropriate. This is called after we have
+ // scanned all the relocations, so we know whether we emitted a
+ // COPY relocation for SYM_.
+ void
+ emit_entry(Copy_reloc_entry& entry,
+ Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
+ Symbol_table* symtab, Layout* layout,
+ Target_mips<size, big_endian>* target);
+};
+
+
+// Return true if the symbol SYM should be considered to resolve local
+// to the current module, and false otherwise. The logic is taken from
+// GNU ld's method _bfd_elf_symbol_refs_local_p.
+static bool
+symbol_refs_local(const Symbol* sym, bool has_dynsym_entry,
+ bool local_protected)
+{
+ // If it's a local sym, of course we resolve locally.
+ if (sym == NULL)
+ return true;
+
+ // STV_HIDDEN or STV_INTERNAL ones must be local.
+ if (sym->visibility() == elfcpp::STV_HIDDEN
+ || sym->visibility() == elfcpp::STV_INTERNAL)
+ return true;
+
+ // If we don't have a definition in a regular file, then we can't
+ // resolve locally. The sym is either undefined or dynamic.
+ if (sym->source() != Symbol::FROM_OBJECT || sym->object()->is_dynamic()
+ || sym->is_undefined())
+ return false;
+
+ // Forced local symbols resolve locally.
+ if (sym->is_forced_local())
+ return true;
+
+ // As do non-dynamic symbols.
+ if (!has_dynsym_entry)
+ return true;
+
+ // At this point, we know the symbol is defined and dynamic. In an
+ // executable it must resolve locally, likewise when building symbolic
+ // shared libraries.
+ if (parameters->options().output_is_executable()
+ || parameters->options().Bsymbolic())
+ return true;
+
+ // Now deal with defined dynamic symbols in shared libraries. Ones
+ // with default visibility might not resolve locally.
+ if (sym->visibility() == elfcpp::STV_DEFAULT)
+ return false;
+
+ // STV_PROTECTED non-function symbols are local.
+ if (sym->type() != elfcpp::STT_FUNC)
+ return true;
+
+ // Function pointer equality tests may require that STV_PROTECTED
+ // symbols be treated as dynamic symbols. If the address of a
+ // function not defined in an executable is set to that function's
+ // plt entry in the executable, then the address of the function in
+ // a shared library must also be the plt entry in the executable.
+ return local_protected;
+}
+
+// Return TRUE if references to this symbol always reference the symbol in this
+// object.
+static bool
+symbol_references_local(const Symbol* sym, bool has_dynsym_entry)
+{
+ return symbol_refs_local(sym, has_dynsym_entry, false);
+}
+
+// Return TRUE if calls to this symbol always call the version in this object.
+static bool
+symbol_calls_local(const Symbol* sym, bool has_dynsym_entry)
+{
+ return symbol_refs_local(sym, has_dynsym_entry, true);
+}
+
+// Compare GOT offsets of two symbols.
+
+template<int size, bool big_endian>
+static bool
+got_offset_compare(Symbol* sym1, Symbol* sym2)
+{
+ Mips_symbol<size>* mips_sym1 = Mips_symbol<size>::as_mips_sym(sym1);
+ Mips_symbol<size>* mips_sym2 = Mips_symbol<size>::as_mips_sym(sym2);
+ unsigned int area1 = mips_sym1->global_got_area();
+ unsigned int area2 = mips_sym2->global_got_area();
+ gold_assert(area1 != GGA_NONE && area1 != GGA_NONE);
+
+ // GGA_NORMAL entries always come before GGA_RELOC_ONLY.
+ if (area1 != area2)
+ return area1 < area2;
+
+ return mips_sym1->global_gotoffset() < mips_sym2->global_gotoffset();
+}
+
+// This method divides dynamic symbols into symbols that have GOT entry, and
+// symbols that don't have GOT entry. It also sorts symbols with the GOT entry.
+// Mips ABI requires that symbols with the GOT entry must be at the end of
+// dynamic symbol table, and the order in dynamic symbol table must match the
+// order in GOT.
+
+template<int size, bool big_endian>
+static void
+reorder_dyn_symbols(std::vector<Symbol*>* dyn_symbols,
+ std::vector<Symbol*>* non_got_symbols,
+ std::vector<Symbol*>* got_symbols)
+{
+ for (std::vector<Symbol*>::iterator p = dyn_symbols->begin();
+ p != dyn_symbols->end();
+ ++p)
+ {
+ Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(*p);
+ if (mips_sym->global_got_area() == GGA_NORMAL
+ || mips_sym->global_got_area() == GGA_RELOC_ONLY)
+ got_symbols->push_back(mips_sym);
+ else
+ non_got_symbols->push_back(mips_sym);
+ }
+
+ std::sort(got_symbols->begin(), got_symbols->end(),
+ got_offset_compare<size, big_endian>);
+}
+
+// Functor class for processing the global symbol table.
+
+template<int size, bool big_endian>
+class Symbol_visitor_check_symbols
+{
+ public:
+ Symbol_visitor_check_symbols(Target_mips<size, big_endian>* target,
+ Layout* layout, Symbol_table* symtab)
+ : target_(target), layout_(layout), symtab_(symtab)
+ { }
+
+ void
+ operator()(Sized_symbol<size>* sym)
+ {
+ Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym);
+ if (local_pic_function<size, big_endian>(mips_sym))
+ {
+ // SYM is a function that might need $25 to be valid on entry.
+ // If we're creating a non-PIC relocatable object, mark SYM as
+ // being PIC. If we're creating a non-relocatable object with
+ // non-PIC branches and jumps to SYM, make sure that SYM has an la25
+ // stub.
+ if (parameters->options().relocatable())
+ {
+ if (!parameters->options().output_is_position_independent())
+ mips_sym->set_pic();
+ }
+ else if (mips_sym->has_nonpic_branches())
+ {
+ this->target_->la25_stub_section(layout_)
+ ->create_la25_stub(this->symtab_, this->target_, mips_sym);
+ }
+ }
+ }
+
+ private:
+ Target_mips<size, big_endian>* target_;
+ Layout* layout_;
+ Symbol_table* symtab_;
+};
+
+template<int size, bool big_endian>
+class Target_mips : public Sized_target<size, big_endian>
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef Output_data_reloc<elfcpp::SHT_REL, true, size, big_endian>
+ Reloc_section;
+ typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>
+ Reloca_section;
+ typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32;
+ typedef typename elfcpp::Swap<size, big_endian>::Valtype Valtype;
+
+ public:
+ Target_mips(const Target::Target_info* info = &mips_info)
+ : Sized_target<size, big_endian>(info), got_(NULL), gp_(NULL), plt_(NULL),
+ got_plt_(NULL), rel_dyn_(NULL), copy_relocs_(),
+ dyn_relocs_(), la25_stub_(NULL), mips_mach_extensions_(),
+ mips_stubs_(NULL), ei_class_(0), mach_(0), layout_(NULL),
+ got16_addends_(), entry_symbol_is_compressed_(false), insn32_(false)
+ {
+ this->add_machine_extensions();
+ }
+
+ // The offset of $gp from the beginning of the .got section.
+ static const unsigned int MIPS_GP_OFFSET = 0x7ff0;
+
+ // The maximum size of the GOT for it to be addressable using 16-bit
+ // offsets from $gp.
+ static const unsigned int MIPS_GOT_MAX_SIZE = MIPS_GP_OFFSET + 0x7fff;
+
+ // Make a new symbol table entry for the Mips target.
+ Sized_symbol<size>*
+ make_symbol() const
+ { return new Mips_symbol<size>(); }
+
+ // Process the relocations to determine unreferenced sections for
+ // garbage collection.
+ void
+ gc_process_relocs(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols);
+
+ // Scan the relocations to look for symbol adjustments.
+ void
+ scan_relocs(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols);
+
+ // Finalize the sections.
+ void
+ do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
+
+ // Relocate a section.
+ void
+ relocate_section(const Relocate_info<size, big_endian>*,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ unsigned char* view,
+ Mips_address view_address,
+ section_size_type view_size,
+ const Reloc_symbol_changes*);
+
+ // Scan the relocs during a relocatable link.
+ void
+ scan_relocatable_relocs(Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols,
+ Relocatable_relocs*);
+
+ // Emit relocations for a section.
+ void
+ relocate_relocs(const Relocate_info<size, big_endian>*,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ offset_in_output_section,
+ const Relocatable_relocs*,
+ unsigned char* view,
+ Mips_address view_address,
+ section_size_type view_size,
+ unsigned char* reloc_view,
+ section_size_type reloc_view_size);
+
+ // Perform target-specific processing in a relocatable link. This is
+ // only used if we use the relocation strategy RELOC_SPECIAL.
+ void
+ relocate_special_relocatable(const Relocate_info<size, big_endian>* relinfo,
+ unsigned int sh_type,
+ const unsigned char* preloc_in,
+ size_t relnum,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ offset_in_output_section,
+ unsigned char* view,
+ Mips_address view_address,
+ section_size_type view_size,
+ unsigned char* preloc_out);
+
+ // Return whether SYM is defined by the ABI.
+ bool
+ do_is_defined_by_abi(const Symbol* sym) const
+ {
+ return ((strcmp(sym->name(), "__gnu_local_gp") == 0)
+ || (strcmp(sym->name(), "_gp_disp") == 0)
+ || (strcmp(sym->name(), "___tls_get_addr") == 0));
+ }
+
+ // Return the number of entries in the GOT.
+ unsigned int
+ got_entry_count() const
+ {
+ if (!this->has_got_section())
+ return 0;
+ return this->got_size() / (size/8);
+ }
+
+ // Return the number of entries in the PLT.
+ unsigned int
+ plt_entry_count() const
+ {
+ if (this->plt_ == NULL)
+ return 0;
+ return this->plt_->entry_count();
+ }
+
+ // Return the offset of the first non-reserved PLT entry.
+ unsigned int
+ first_plt_entry_offset() const
+ { return this->plt_->first_plt_entry_offset(); }
+
+ // Return the size of each PLT entry.
+ unsigned int
+ plt_entry_size() const
+ { return this->plt_->plt_entry_size(); }
+
+ // Get the GOT section, creating it if necessary.
+ Mips_output_data_got<size, big_endian>*
+ got_section(Symbol_table*, Layout*);
+
+ // Get the GOT section.
+ Mips_output_data_got<size, big_endian>*
+ got_section() const
+ {
+ gold_assert(this->got_ != NULL);
+ return this->got_;
+ }
+
+ // Get the .MIPS.stubs section, creating it if necessary.
+ Mips_output_data_mips_stubs<size, big_endian>*
+ mips_stubs_section(Layout* layout);
+
+ // Get the .MIPS.stubs section.
+ Mips_output_data_mips_stubs<size, big_endian>*
+ mips_stubs_section() const
+ {
+ gold_assert(this->mips_stubs_ != NULL);
+ return this->mips_stubs_;
+ }
+
+ // Get the LA25 stub section, creating it if necessary.
+ Mips_output_data_la25_stub<size, big_endian>*
+ la25_stub_section(Layout*);
+
+ // Get the LA25 stub section.
+ Mips_output_data_la25_stub<size, big_endian>*
+ la25_stub_section()
+ {
+ gold_assert(this->la25_stub_ != NULL);
+ return this->la25_stub_;
+ }
+
+ // Get gp value. It has the value of .got + 0x7FF0.
+ Mips_address
+ gp_value() const
+ {
+ if (this->gp_ != NULL)
+ return this->gp_->value();
+ return 0;
+ }
+
+ // Get gp value. It has the value of .got + 0x7FF0. Adjust it for
+ // multi-GOT links so that OBJECT's GOT + 0x7FF0 is returned.
+ Mips_address
+ adjusted_gp_value(const Mips_relobj<size, big_endian>* object)
+ {
+ if (this->gp_ == NULL)
+ return 0;
+
+ bool multi_got = false;
+ if (this->has_got_section())
+ multi_got = this->got_section()->multi_got();
+ if (!multi_got)
+ return this->gp_->value();
+ else
+ return this->gp_->value() + this->got_section()->get_got_offset(object);
+ }
+
+ // Get the dynamic reloc section, creating it if necessary.
+ Reloc_section*
+ rel_dyn_section(Layout*);
+
+ bool
+ do_has_custom_set_dynsym_indexes() const
+ { return true; }
+
+ // Don't emit input .reginfo sections to output .reginfo.
+ bool
+ do_should_include_section(elfcpp::Elf_Word sh_type) const
+ { return sh_type != elfcpp::SHT_MIPS_REGINFO; }
+
+ // Set the dynamic symbol indexes. INDEX is the index of the first
+ // global dynamic symbol. Pointers to the symbols are stored into the
+ // vector SYMS. The names are added to DYNPOOL. This returns an
+ // updated dynamic symbol index.
+ unsigned int
+ do_set_dynsym_indexes(std::vector<Symbol*>* dyn_symbols, unsigned int index,
+ std::vector<Symbol*>* syms, Stringpool* dynpool,
+ Versions* versions, Symbol_table* symtab) const;
+
+ // Remove .MIPS.stubs entry for a symbol.
+ void
+ remove_lazy_stub_entry(Mips_symbol<size>* sym)
+ {
+ if (this->mips_stubs_ != NULL)
+ this->mips_stubs_->remove_entry(sym);
+ }
+
+ // The value to write into got[1] for SVR4 targets, to identify it is
+ // a GNU object. The dynamic linker can then use got[1] to store the
+ // module pointer.
+ uint64_t
+ mips_elf_gnu_got1_mask()
+ {
+ if (this->is_output_n64())
+ return (uint64_t)1 << 63;
+ else
+ return 1 << 31;
+ }
+
+ // Whether the output has microMIPS code. This is valid only after
+ // merge_processor_specific_flags() is called.
+ bool
+ is_output_micromips() const
+ {
+ gold_assert(this->are_processor_specific_flags_set());
+ return elfcpp::is_micromips(this->processor_specific_flags());
+ }
+
+ // Whether the output uses N32 ABI. This is valid only after
+ // merge_processor_specific_flags() is called.
+ bool
+ is_output_n32() const
+ {
+ gold_assert(this->are_processor_specific_flags_set());
+ return elfcpp::abi_n32(this->processor_specific_flags());
+ }
+
+ // Whether the output uses N64 ABI. This is valid only after
+ // merge_processor_specific_flags() is called.
+ bool
+ is_output_n64() const
+ {
+ gold_assert(this->are_processor_specific_flags_set());
+ return elfcpp::abi_64(this->ei_class_);
+ }
+
+ // Whether the output uses NEWABI. This is valid only after
+ // merge_processor_specific_flags() is called.
+ bool
+ is_output_newabi() const
+ { return this->is_output_n32() || this->is_output_n64(); }
+
+ // Whether we can only use 32-bit microMIPS instructions.
+ bool
+ use_32bit_micromips_instructions() const
+ { return this->insn32_; }
+
+ protected:
+ // Return the value to use for a dynamic symbol which requires special
+ // treatment. This is how we support equality comparisons of function
+ // pointers across shared library boundaries, as described in the
+ // processor specific ABI supplement.
+ uint64_t
+ do_dynsym_value(const Symbol* gsym) const;
+
+ // Make an ELF object.
+ Object*
+ do_make_elf_object(const std::string&, Input_file*, off_t,
+ const elfcpp::Ehdr<size, big_endian>& ehdr);
+
+ Object*
+ do_make_elf_object(const std::string&, Input_file*, off_t,
+ const elfcpp::Ehdr<size, !big_endian>&)
+ { gold_unreachable(); }
+
+ // Make an output section.
+ Output_section*
+ do_make_output_section(const char* name, elfcpp::Elf_Word type,
+ elfcpp::Elf_Xword flags)
+ {
+ if (type == elfcpp::SHT_MIPS_REGINFO)
+ return new Mips_output_section_reginfo<size, big_endian>(name, type,
+ flags, this);
+ else
+ return new Output_section(name, type, flags);
+ }
+
+ // Adjust ELF file header.
+ void
+ do_adjust_elf_header(unsigned char* view, int len);
+
+ // Get the custom dynamic tag value.
+ unsigned int
+ do_dynamic_tag_custom_value(elfcpp::DT) const;
+
+ // Adjust the value written to the dynamic symbol table.
+ virtual void
+ do_adjust_dyn_symbol(const Symbol* sym, unsigned char* view) const
+ {
+ elfcpp::Sym<size, big_endian> isym(view);
+ elfcpp::Sym_write<size, big_endian> osym(view);
+ const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(sym);
+
+ // Keep dynamic compressed symbols odd. This allows the dynamic linker
+ // to treat compressed symbols like any other.
+ Mips_address value = isym.get_st_value();
+ if (mips_sym->is_mips16() && value != 0)
+ {
+ if (!mips_sym->has_mips16_fn_stub())
+ value |= 1;
+ else
+ {
+ // If we have a MIPS16 function with a stub, the dynamic symbol
+ // must refer to the stub, since only the stub uses the standard
+ // calling conventions. Stub contains MIPS32 code, so don't add +1
+ // in this case.
+
+ // There is a code which does this in the method
+ // Target_mips::do_dynsym_value, but that code will only be
+ // executed if the symbol is from dynobj.
+ // TODO(sasa): GNU ld also changes the value in non-dynamic symbol
+ // table.
+
+ Mips16_stub_section<size, big_endian>* fn_stub =
+ mips_sym->template get_mips16_fn_stub<big_endian>();
+ value = fn_stub->output_address();
+ osym.put_st_size(fn_stub->section_size());
+ }
+
+ osym.put_st_value(value);
+ osym.put_st_other(elfcpp::elf_st_other(sym->visibility(),
+ mips_sym->nonvis() - (elfcpp::STO_MIPS16 >> 2)));
+ }
+ else if ((mips_sym->is_micromips()
+ // Stubs are always microMIPS if there is any microMIPS code in
+ // the output.
+ || (this->is_output_micromips() && mips_sym->has_lazy_stub()))
+ && value != 0)
+ {
+ osym.put_st_value(value | 1);
+ osym.put_st_other(elfcpp::elf_st_other(sym->visibility(),
+ mips_sym->nonvis() - (elfcpp::STO_MICROMIPS >> 2)));
+ }
+ }
+
+ private:
+ // The class which scans relocations.
+ class Scan
+ {
+ public:
+ Scan()
+ { }
+
+ static inline int
+ get_reference_flags(unsigned int r_type);
+
+ inline void
+ local(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded);
+
+ inline void
+ local(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded);
+
+ inline void
+ local(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>* rela,
+ const elfcpp::Rel<size, big_endian>* rel,
+ unsigned int rel_type,
+ unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded);
+
+ inline void
+ global(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rel<size, big_endian>& reloc, unsigned int r_type,
+ Symbol* gsym);
+
+ inline void
+ global(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
+ Symbol* gsym);
+
+ inline void
+ global(Symbol_table* symtab, Layout* layout, Target_mips* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>* rela,
+ const elfcpp::Rel<size, big_endian>* rel,
+ unsigned int rel_type,
+ unsigned int r_type,
+ Symbol* gsym);
+
+ inline bool
+ local_reloc_may_be_function_pointer(Symbol_table* , Layout*,
+ Target_mips*,
+ Sized_relobj_file<size, big_endian>*,
+ unsigned int,
+ Output_section*,
+ const elfcpp::Rel<size, big_endian>&,
+ unsigned int,
+ const elfcpp::Sym<size, big_endian>&)
+ { return false; }
+
+ inline bool
+ global_reloc_may_be_function_pointer(Symbol_table*, Layout*,
+ Target_mips*,
+ Sized_relobj_file<size, big_endian>*,
+ unsigned int,
+ Output_section*,
+ const elfcpp::Rel<size, big_endian>&,
+ unsigned int, Symbol*)
+ { return false; }
+
+ inline bool
+ local_reloc_may_be_function_pointer(Symbol_table*, Layout*,
+ Target_mips*,
+ Sized_relobj_file<size, big_endian>*,
+ unsigned int,
+ Output_section*,
+ const elfcpp::Rela<size, big_endian>&,
+ unsigned int,
+ const elfcpp::Sym<size, big_endian>&)
+ { return false; }
+
+ inline bool
+ global_reloc_may_be_function_pointer(Symbol_table*, Layout*,
+ Target_mips*,
+ Sized_relobj_file<size, big_endian>*,
+ unsigned int,
+ Output_section*,
+ const elfcpp::Rela<size, big_endian>&,
+ unsigned int, Symbol*)
+ { return false; }
+ private:
+ static void
+ unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
+ unsigned int r_type);
+
+ static void
+ unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
+ unsigned int r_type, Symbol*);
+ };
+
+ // The class which implements relocation.
+ class Relocate
+ {
+ public:
+ Relocate()
+ { }
+
+ ~Relocate()
+ { }
+
+ // Return whether the R_MIPS_32 relocation needs to be applied.
+ inline bool
+ should_apply_r_mips_32_reloc(const Mips_symbol<size>* gsym,
+ unsigned int r_type,
+ Output_section* output_section,
+ Target_mips* target);
+
+ // Do a relocation. Return false if the caller should not issue
+ // any warnings about this relocation.
+ inline bool
+ relocate(const Relocate_info<size, big_endian>*, Target_mips*,
+ Output_section*, size_t relnum,
+ const elfcpp::Rela<size, big_endian>*,
+ const elfcpp::Rel<size, big_endian>*,
+ unsigned int,
+ unsigned int, const Sized_symbol<size>*,
+ const Symbol_value<size>*,
+ unsigned char*,
+ Mips_address,
+ section_size_type);
+
+ inline bool
+ relocate(const Relocate_info<size, big_endian>*, Target_mips*,
+ Output_section*, size_t relnum,
+ const elfcpp::Rel<size, big_endian>&,
+ unsigned int, const Sized_symbol<size>*,
+ const Symbol_value<size>*,
+ unsigned char*,
+ Mips_address,
+ section_size_type);
+
+ inline bool
+ relocate(const Relocate_info<size, big_endian>*, Target_mips*,
+ Output_section*, size_t relnum,
+ const elfcpp::Rela<size, big_endian>&,
+ unsigned int, const Sized_symbol<size>*,
+ const Symbol_value<size>*,
+ unsigned char*,
+ Mips_address,
+ section_size_type);
+ };
+
+ // A class which returns the size required for a relocation type,
+ // used while scanning relocs during a relocatable link.
+ class Relocatable_size_for_reloc
+ {
+ public:
+ unsigned int
+ get_size_for_reloc(unsigned int, Relobj*);
+ };
+
+ // This POD class holds the dynamic relocations that should be emitted instead
+ // of R_MIPS_32, R_MIPS_REL32 and R_MIPS_64 relocations. We will emit these
+ // relocations if it turns out that the symbol does not have static
+ // relocations.
+ class Dyn_reloc
+ {
+ public:
+ Dyn_reloc(Mips_symbol<size>* sym, unsigned int r_type,
+ Mips_relobj<size, big_endian>* relobj, unsigned int shndx,
+ Output_section* output_section, Mips_address r_offset)
+ : sym_(sym), r_type_(r_type), relobj_(relobj),
+ shndx_(shndx), output_section_(output_section),
+ r_offset_(r_offset)
+ { }
+
+ // Emit this reloc if appropriate. This is called after we have
+ // scanned all the relocations, so we know whether the symbol has
+ // static relocations.
+ void
+ emit(Reloc_section* rel_dyn, Mips_output_data_got<size, big_endian>* got,
+ Symbol_table* symtab)
+ {
+ if (!this->sym_->has_static_relocs())
+ {
+ got->record_global_got_symbol(this->sym_, this->relobj_,
+ this->r_type_, true, false);
+ if (!symbol_references_local(this->sym_,
+ this->sym_->should_add_dynsym_entry(symtab)))
+ rel_dyn->add_global(this->sym_, this->r_type_,
+ this->output_section_, this->relobj_,
+ this->shndx_, this->r_offset_);
+ else
+ rel_dyn->add_symbolless_global_addend(this->sym_, this->r_type_,
+ this->output_section_, this->relobj_,
+ this->shndx_, this->r_offset_);
+ }
+ }
+
+ private:
+ Mips_symbol<size>* sym_;
+ unsigned int r_type_;
+ Mips_relobj<size, big_endian>* relobj_;
+ unsigned int shndx_;
+ Output_section* output_section_;
+ Mips_address r_offset_;
+ };
+
+ // Adjust TLS relocation type based on the options and whether this
+ // is a local symbol.
+ static tls::Tls_optimization
+ optimize_tls_reloc(bool is_final, int r_type);
+
+ // Return whether there is a GOT section.
+ bool
+ has_got_section() const
+ { return this->got_ != NULL; }
+
+ // Check whether the given ELF header flags describe a 32-bit binary.
+ bool
+ mips_32bit_flags(elfcpp::Elf_Word);
+
+ enum Mips_mach {
+ mach_mips3000 = 3000,
+ mach_mips3900 = 3900,
+ mach_mips4000 = 4000,
+ mach_mips4010 = 4010,
+ mach_mips4100 = 4100,
+ mach_mips4111 = 4111,
+ mach_mips4120 = 4120,
+ mach_mips4300 = 4300,
+ mach_mips4400 = 4400,
+ mach_mips4600 = 4600,
+ mach_mips4650 = 4650,
+ mach_mips5000 = 5000,
+ mach_mips5400 = 5400,
+ mach_mips5500 = 5500,
+ mach_mips6000 = 6000,
+ mach_mips7000 = 7000,
+ mach_mips8000 = 8000,
+ mach_mips9000 = 9000,
+ mach_mips10000 = 10000,
+ mach_mips12000 = 12000,
+ mach_mips14000 = 14000,
+ mach_mips16000 = 16000,
+ mach_mips16 = 16,
+ mach_mips5 = 5,
+ mach_mips_loongson_2e = 3001,
+ mach_mips_loongson_2f = 3002,
+ mach_mips_loongson_3a = 3003,
+ mach_mips_sb1 = 12310201, // octal 'SB', 01
+ mach_mips_octeon = 6501,
+ mach_mips_octeonp = 6601,
+ mach_mips_octeon2 = 6502,
+ mach_mips_xlr = 887682, // decimal 'XLR'
+ mach_mipsisa32 = 32,
+ mach_mipsisa32r2 = 33,
+ mach_mipsisa64 = 64,
+ mach_mipsisa64r2 = 65,
+ mach_mips_micromips = 96
+ };
+
+ // Return the MACH for a MIPS e_flags value.
+ unsigned int
+ elf_mips_mach(elfcpp::Elf_Word);
+
+ // Check whether machine EXTENSION is an extension of machine BASE.
+ bool
+ mips_mach_extends(unsigned int, unsigned int);
+
+ // Merge processor specific flags.
+ void
+ merge_processor_specific_flags(const std::string&, elfcpp::Elf_Word,
+ unsigned char, bool);
+
+ // True if we are linking for CPUs that are faster if JAL is converted to BAL.
+ static inline bool
+ jal_to_bal()
+ { return false; }
+
+ // True if we are linking for CPUs that are faster if JALR is converted to
+ // BAL. This should be safe for all architectures. We enable this predicate
+ // for all CPUs.
+ static inline bool
+ jalr_to_bal()
+ { return true; }
+
+ // True if we are linking for CPUs that are faster if JR is converted to B.
+ // This should be safe for all architectures. We enable this predicate for
+ // all CPUs.
+ static inline bool
+ jr_to_b()
+ { return true; }
+
+ // Return the size of the GOT section.
+ section_size_type
+ got_size() const
+ {
+ gold_assert(this->got_ != NULL);
+ return this->got_->data_size();
+ }
+
+ // Create a PLT entry for a global symbol referenced by r_type relocation.
+ void
+ make_plt_entry(Symbol_table*, Layout*, Mips_symbol<size>*,
+ unsigned int r_type);
+
+ // Get the PLT section.
+ Mips_output_data_plt<size, big_endian>*
+ plt_section() const
+ {
+ gold_assert(this->plt_ != NULL);
+ return this->plt_;
+ }
+
+ // Get the GOT PLT section.
+ const Mips_output_data_plt<size, big_endian>*
+ got_plt_section() const
+ {
+ gold_assert(this->got_plt_ != NULL);
+ return this->got_plt_;
+ }
+
+ // Copy a relocation against a global symbol.
+ void
+ copy_reloc(Symbol_table* symtab, Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int shndx, Output_section* output_section,
+ Symbol* sym, const elfcpp::Rel<size, big_endian>& reloc)
+ {
+ this->copy_relocs_.copy_reloc(symtab, layout,
+ symtab->get_sized_symbol<size>(sym),
+ object, shndx, output_section,
+ reloc, this->rel_dyn_section(layout));
+ }
+
+ void
+ dynamic_reloc(Mips_symbol<size>* sym, unsigned int r_type,
+ Mips_relobj<size, big_endian>* relobj,
+ unsigned int shndx, Output_section* output_section,
+ Mips_address r_offset)
+ {
+ this->dyn_relocs_.push_back(Dyn_reloc(sym, r_type, relobj, shndx,
+ output_section, r_offset));
+ }
+
+ // Calculate value of _gp symbol.
+ void
+ set_gp(Layout*, Symbol_table*);
+
+ const char*
+ elf_mips_abi_name(elfcpp::Elf_Word e_flags, unsigned char ei_class);
+ const char*
+ elf_mips_mach_name(elfcpp::Elf_Word e_flags);
+
+ // Adds entries that describe how machines relate to one another. The entries
+ // are ordered topologically with MIPS I extensions listed last. First
+ // element is extension, second element is base.
+ void
+ add_machine_extensions()
+ {
+ // MIPS64r2 extensions.
+ this->add_extension(mach_mips_octeon2, mach_mips_octeonp);
+ this->add_extension(mach_mips_octeonp, mach_mips_octeon);
+ this->add_extension(mach_mips_octeon, mach_mipsisa64r2);
+
+ // MIPS64 extensions.
+ this->add_extension(mach_mipsisa64r2, mach_mipsisa64);
+ this->add_extension(mach_mips_sb1, mach_mipsisa64);
+ this->add_extension(mach_mips_xlr, mach_mipsisa64);
+ this->add_extension(mach_mips_loongson_3a, mach_mipsisa64);
+
+ // MIPS V extensions.
+ this->add_extension(mach_mipsisa64, mach_mips5);
+
+ // R10000 extensions.
+ this->add_extension(mach_mips12000, mach_mips10000);
+ this->add_extension(mach_mips14000, mach_mips10000);
+ this->add_extension(mach_mips16000, mach_mips10000);
+
+ // R5000 extensions. Note: the vr5500 ISA is an extension of the core
+ // vr5400 ISA, but doesn't include the multimedia stuff. It seems
+ // better to allow vr5400 and vr5500 code to be merged anyway, since
+ // many libraries will just use the core ISA. Perhaps we could add
+ // some sort of ASE flag if this ever proves a problem.
+ this->add_extension(mach_mips5500, mach_mips5400);
+ this->add_extension(mach_mips5400, mach_mips5000);
+
+ // MIPS IV extensions.
+ this->add_extension(mach_mips5, mach_mips8000);
+ this->add_extension(mach_mips10000, mach_mips8000);
+ this->add_extension(mach_mips5000, mach_mips8000);
+ this->add_extension(mach_mips7000, mach_mips8000);
+ this->add_extension(mach_mips9000, mach_mips8000);
+
+ // VR4100 extensions.
+ this->add_extension(mach_mips4120, mach_mips4100);
+ this->add_extension(mach_mips4111, mach_mips4100);
+
+ // MIPS III extensions.
+ this->add_extension(mach_mips_loongson_2e, mach_mips4000);
+ this->add_extension(mach_mips_loongson_2f, mach_mips4000);
+ this->add_extension(mach_mips8000, mach_mips4000);
+ this->add_extension(mach_mips4650, mach_mips4000);
+ this->add_extension(mach_mips4600, mach_mips4000);
+ this->add_extension(mach_mips4400, mach_mips4000);
+ this->add_extension(mach_mips4300, mach_mips4000);
+ this->add_extension(mach_mips4100, mach_mips4000);
+ this->add_extension(mach_mips4010, mach_mips4000);
+
+ // MIPS32 extensions.
+ this->add_extension(mach_mipsisa32r2, mach_mipsisa32);
+
+ // MIPS II extensions.
+ this->add_extension(mach_mips4000, mach_mips6000);
+ this->add_extension(mach_mipsisa32, mach_mips6000);
+
+ // MIPS I extensions.
+ this->add_extension(mach_mips6000, mach_mips3000);
+ this->add_extension(mach_mips3900, mach_mips3000);
+ }
+
+ // Add value to MIPS extenstions.
+ void
+ add_extension(unsigned int base, unsigned int extension)
+ {
+ std::pair<unsigned int, unsigned int> ext(base, extension);
+ this->mips_mach_extensions_.push_back(ext);
+ }
+
+ // Return the number of entries in the .dynsym section.
+ unsigned int get_dt_mips_symtabno() const
+ {
+ return ((unsigned int)(this->layout_->dynsym_section()->data_size()
+ / elfcpp::Elf_sizes<size>::sym_size));
+ // TODO(sasa): Entry size is MIPS_ELF_SYM_SIZE.
+ }
+
+ // Information about this specific target which we pass to the
+ // general Target structure.
+ static Target::Target_info mips_info;
+ // The GOT section.
+ Mips_output_data_got<size, big_endian>* got_;
+ // gp symbol. It has the value of .got + 0x7FF0.
+ Sized_symbol<size>* gp_;
+ // The PLT section.
+ Mips_output_data_plt<size, big_endian>* plt_;
+ // The GOT PLT section.
+ Output_data_space* got_plt_;
+ // The dynamic reloc section.
+ Reloc_section* rel_dyn_;
+ // Relocs saved to avoid a COPY reloc.
+ Mips_copy_relocs<elfcpp::SHT_REL, size, big_endian> copy_relocs_;
+
+ // A list of dyn relocs to be saved.
+ std::vector<Dyn_reloc> dyn_relocs_;
+
+ // The LA25 stub section.
+ Mips_output_data_la25_stub<size, big_endian>* la25_stub_;
+ // Architecture extensions.
+ std::vector<std::pair<unsigned int, unsigned int> > mips_mach_extensions_;
+ // .MIPS.stubs
+ Mips_output_data_mips_stubs<size, big_endian>* mips_stubs_;
+
+ unsigned char ei_class_;
+ unsigned int mach_;
+ Layout* layout_;
+
+ typename std::list<got16_addend<size, big_endian> > got16_addends_;
+
+ // Whether the entry symbol is mips16 or micromips.
+ bool entry_symbol_is_compressed_;
+
+ // Whether we can use only 32-bit microMIPS instructions.
+ // TODO(sasa): This should be a linker option.
+ bool insn32_;
+};
+
+
+// Helper structure for R_MIPS*_HI16/LO16 and R_MIPS*_GOT16/LO16 relocations.
+// It records high part of the relocation pair.
+
+template<int size, bool big_endian>
+struct reloc_high
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+
+ reloc_high(unsigned char* _view, const Mips_relobj<size, big_endian>* _object,
+ const Symbol_value<size>* _psymval, Mips_address _addend,
+ unsigned int _r_type, bool _extract_addend,
+ Mips_address _address = 0, bool _gp_disp = false)
+ : view(_view), object(_object), psymval(_psymval), addend(_addend),
+ r_type(_r_type), extract_addend(_extract_addend), address(_address),
+ gp_disp(_gp_disp)
+ { }
+
+ unsigned char* view;
+ const Mips_relobj<size, big_endian>* object;
+ const Symbol_value<size>* psymval;
+ Mips_address addend;
+ unsigned int r_type;
+ bool extract_addend;
+ Mips_address address;
+ bool gp_disp;
+};
+
+template<int size, bool big_endian>
+class Mips_relocate_functions : public Relocate_functions<size, big_endian>
+{
+ typedef typename elfcpp::Elf_types<size>::Elf_Addr Mips_address;
+ typedef typename elfcpp::Swap<16, big_endian>::Valtype Valtype16;
+ typedef typename elfcpp::Swap<32, big_endian>::Valtype Valtype32;
+
+ public:
+ typedef enum
+ {
+ STATUS_OKAY, // No error during relocation.
+ STATUS_OVERFLOW, // Relocation overflow.
+ STATUS_BAD_RELOC // Relocation cannot be applied.
+ } Status;
+
+ private:
+ typedef Relocate_functions<size, big_endian> Base;
+ typedef Mips_relocate_functions<size, big_endian> This;
+
+ static typename std::list<reloc_high<size, big_endian> > hi16_relocs;
+ static typename std::list<reloc_high<size, big_endian> > got16_relocs;
+
+ // R_MIPS16_26 is used for the mips16 jal and jalx instructions.
+ // Most mips16 instructions are 16 bits, but these instructions
+ // are 32 bits.
+ //
+ // The format of these instructions is:
+ //
+ // +--------------+--------------------------------+
+ // | JALX | X| Imm 20:16 | Imm 25:21 |
+ // +--------------+--------------------------------+
+ // | Immediate 15:0 |
+ // +-----------------------------------------------+
+ //
+ // JALX is the 5-bit value 00011. X is 0 for jal, 1 for jalx.
+ // Note that the immediate value in the first word is swapped.
+ //
+ // When producing a relocatable object file, R_MIPS16_26 is
+ // handled mostly like R_MIPS_26. In particular, the addend is
+ // stored as a straight 26-bit value in a 32-bit instruction.
+ // (gas makes life simpler for itself by never adjusting a
+ // R_MIPS16_26 reloc to be against a section, so the addend is
+ // always zero). However, the 32 bit instruction is stored as 2
+ // 16-bit values, rather than a single 32-bit value. In a
+ // big-endian file, the result is the same; in a little-endian
+ // file, the two 16-bit halves of the 32 bit value are swapped.
+ // This is so that a disassembler can recognize the jal
+ // instruction.
+ //
+ // When doing a final link, R_MIPS16_26 is treated as a 32 bit
+ // instruction stored as two 16-bit values. The addend A is the
+ // contents of the targ26 field. The calculation is the same as
+ // R_MIPS_26. When storing the calculated value, reorder the
+ // immediate value as shown above, and don't forget to store the
+ // value as two 16-bit values.
+ //
+ // To put it in MIPS ABI terms, the relocation field is T-targ26-16,
+ // defined as
+ //
+ // big-endian:
+ // +--------+----------------------+
+ // | | |
+ // | | targ26-16 |
+ // |31 26|25 0|
+ // +--------+----------------------+
+ //
+ // little-endian:
+ // +----------+------+-------------+
+ // | | | |
+ // | sub1 | | sub2 |
+ // |0 9|10 15|16 31|
+ // +----------+--------------------+
+ // where targ26-16 is sub1 followed by sub2 (i.e., the addend field A is
+ // ((sub1 << 16) | sub2)).
+ //
+ // When producing a relocatable object file, the calculation is
+ // (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
+ // When producing a fully linked file, the calculation is
+ // let R = (((A < 2) | ((P + 4) & 0xf0000000) + S) >> 2)
+ // ((R & 0x1f0000) << 5) | ((R & 0x3e00000) >> 5) | (R & 0xffff)
+ //
+ // The table below lists the other MIPS16 instruction relocations.
+ // Each one is calculated in the same way as the non-MIPS16 relocation
+ // given on the right, but using the extended MIPS16 layout of 16-bit
+ // immediate fields:
+ //
+ // R_MIPS16_GPREL R_MIPS_GPREL16
+ // R_MIPS16_GOT16 R_MIPS_GOT16
+ // R_MIPS16_CALL16 R_MIPS_CALL16
+ // R_MIPS16_HI16 R_MIPS_HI16
+ // R_MIPS16_LO16 R_MIPS_LO16
+ //
+ // A typical instruction will have a format like this:
+ //
+ // +--------------+--------------------------------+
+ // | EXTEND | Imm 10:5 | Imm 15:11 |
+ // +--------------+--------------------------------+
+ // | Major | rx | ry | Imm 4:0 |
+ // +--------------+--------------------------------+
+ //
+ // EXTEND is the five bit value 11110. Major is the instruction
+ // opcode.
+ //
+ // All we need to do here is shuffle the bits appropriately.
+ // As above, the two 16-bit halves must be swapped on a
+ // little-endian system.
+
+ // Similar to MIPS16, the two 16-bit halves in microMIPS must be swapped
+ // on a little-endian system. This does not apply to R_MICROMIPS_PC7_S1
+ // and R_MICROMIPS_PC10_S1 relocs that apply to 16-bit instructions.
+
+ static inline bool
+ should_shuffle_micromips_reloc(unsigned int r_type)
+ {
+ return (micromips_reloc(r_type)
+ && r_type != elfcpp::R_MICROMIPS_PC7_S1
+ && r_type != elfcpp::R_MICROMIPS_PC10_S1);
+ }
+
+ static void
+ mips_reloc_unshuffle(unsigned char* view, unsigned int r_type,
+ bool jal_shuffle)
+ {
+ if (!mips16_reloc(r_type)
+ && !should_shuffle_micromips_reloc(r_type))
+ return;
+
+ // Pick up the first and second halfwords of the instruction.
+ Valtype16 first = elfcpp::Swap<16, big_endian>::readval(view);
+ Valtype16 second = elfcpp::Swap<16, big_endian>::readval(view + 2);
+ Valtype32 val;
+
+ if (micromips_reloc(r_type)
+ || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle))
+ val = first << 16 | second;
+ else if (r_type != elfcpp::R_MIPS16_26)
+ val = (((first & 0xf800) << 16) | ((second & 0xffe0) << 11)
+ | ((first & 0x1f) << 11) | (first & 0x7e0) | (second & 0x1f));
+ else
+ val = (((first & 0xfc00) << 16) | ((first & 0x3e0) << 11)
+ | ((first & 0x1f) << 21) | second);
+
+ elfcpp::Swap<32, big_endian>::writeval(view, val);
+ }
+
+ static void
+ mips_reloc_shuffle(unsigned char* view, unsigned int r_type, bool jal_shuffle)
+ {
+ if (!mips16_reloc(r_type)
+ && !should_shuffle_micromips_reloc(r_type))
+ return;
+
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ Valtype16 first, second;
+
+ if (micromips_reloc(r_type)
+ || (r_type == elfcpp::R_MIPS16_26 && !jal_shuffle))
+ {
+ second = val & 0xffff;
+ first = val >> 16;
+ }
+ else if (r_type != elfcpp::R_MIPS16_26)
+ {
+ second = ((val >> 11) & 0xffe0) | (val & 0x1f);
+ first = ((val >> 16) & 0xf800) | ((val >> 11) & 0x1f) | (val & 0x7e0);
+ }
+ else
+ {
+ second = val & 0xffff;
+ first = ((val >> 16) & 0xfc00) | ((val >> 11) & 0x3e0)
+ | ((val >> 21) & 0x1f);
+ }
+
+ elfcpp::Swap<16, big_endian>::writeval(view + 2, second);
+ elfcpp::Swap<16, big_endian>::writeval(view, first);
+ }
+
+ public:
+ // R_MIPS_16: S + sign-extend(A)
+ static inline typename This::Status
+ rel16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype16* wv = reinterpret_cast<Valtype16*>(view);
+ Valtype16 val = elfcpp::Swap<16, big_endian>::readval(wv);
+
+ Valtype32 addend = (extract_addend ? Bits<16>::sign_extend32(val)
+ : Bits<16>::sign_extend32(addend_a));
+
+ Valtype32 x = psymval->value(object, addend);
+ val = Bits<16>::bit_select32(val, x, 0xffffU);
+ elfcpp::Swap<16, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_32: S + A
+ static inline typename This::Status
+ rel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 addend = (extract_addend
+ ? elfcpp::Swap<32, big_endian>::readval(wv)
+ : Bits<32>::sign_extend32(addend_a));
+ Valtype32 x = psymval->value(object, addend);
+ elfcpp::Swap<32, big_endian>::writeval(wv, x);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_JALR, R_MICROMIPS_JALR
+ static inline typename This::Status
+ reljalr(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend, bool cross_mode_jump,
+ unsigned int r_type, bool jalr_to_bal, bool jr_to_b)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 addend = extract_addend ? 0 : addend_a;
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ // Try converting J(AL)R to B(AL), if the target is in range.
+ if (!parameters->options().relocatable()
+ && r_type == elfcpp::R_MIPS_JALR
+ && !cross_mode_jump
+ && ((jalr_to_bal && val == 0x0320f809) // jalr t9
+ || (jr_to_b && val == 0x03200008))) // jr t9
+ {
+ int offset = psymval->value(object, addend) - (address + 4);
+ if (!Bits<18>::has_overflow32(offset))
+ {
+ if (val == 0x03200008) // jr t9
+ val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr
+ else
+ val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr
+ }
+ }
+
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_PC32: S + A - P
+ static inline typename This::Status
+ relpc32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 addend = (extract_addend
+ ? elfcpp::Swap<32, big_endian>::readval(wv)
+ : Bits<32>::sign_extend32(addend_a));
+ Valtype32 x = psymval->value(object, addend) - address;
+ elfcpp::Swap<32, big_endian>::writeval(wv, x);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_26, R_MIPS16_26, R_MICROMIPS_26_S1
+ static inline typename This::Status
+ rel26(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ bool local, Mips_address addend_a, bool extract_addend,
+ const Symbol* gsym, bool cross_mode_jump, unsigned int r_type,
+ bool jal_to_bal)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend;
+ if (extract_addend)
+ {
+ if (r_type == elfcpp::R_MICROMIPS_26_S1)
+ addend = (val & 0x03ffffff) << 1;
+ else
+ addend = (val & 0x03ffffff) << 2;
+ }
+ else
+ addend = addend_a;
+
+ // Make sure the target of JALX is word-aligned. Bit 0 must be
+ // the correct ISA mode selector and bit 1 must be 0.
+ if (cross_mode_jump
+ && (psymval->value(object, 0) & 3) != (r_type == elfcpp::R_MIPS_26))
+ {
+ gold_warning(_("JALX to a non-word-aligned address"));
+ mips_reloc_shuffle(view, r_type, !parameters->options().relocatable());
+ return This::STATUS_BAD_RELOC;
+ }
+
+ // Shift is 2, unusually, for microMIPS JALX.
+ unsigned int shift =
+ (!cross_mode_jump && r_type == elfcpp::R_MICROMIPS_26_S1) ? 1 : 2;
+
+ Valtype32 x;
+ if (local)
+ x = addend | ((address + 4) & (0xfc000000 << shift));
+ else
+ {
+ if (shift == 1)
+ x = Bits<27>::sign_extend32(addend);
+ else
+ x = Bits<28>::sign_extend32(addend);
+ }
+ x = psymval->value(object, x) >> shift;
+
+ if (!local && !gsym->is_weak_undefined())
+ {
+ if ((x >> 26) != ((address + 4) >> (26 + shift)))
+ {
+ gold_error(_("relocation truncated to fit: %u against '%s'"),
+ r_type, gsym->name());
+ return This::STATUS_OVERFLOW;
+ }
+ }
+
+ val = Bits<32>::bit_select32(val, x, 0x03ffffff);
+
+ // If required, turn JAL into JALX.
+ if (cross_mode_jump)
+ {
+ bool ok;
+ Valtype32 opcode = val >> 26;
+ Valtype32 jalx_opcode;
+
+ // Check to see if the opcode is already JAL or JALX.
+ if (r_type == elfcpp::R_MIPS16_26)
+ {
+ ok = (opcode == 0x6) || (opcode == 0x7);
+ jalx_opcode = 0x7;
+ }
+ else if (r_type == elfcpp::R_MICROMIPS_26_S1)
+ {
+ ok = (opcode == 0x3d) || (opcode == 0x3c);
+ jalx_opcode = 0x3c;
+ }
+ else
+ {
+ ok = (opcode == 0x3) || (opcode == 0x1d);
+ jalx_opcode = 0x1d;
+ }
+
+ // If the opcode is not JAL or JALX, there's a problem. We cannot
+ // convert J or JALS to JALX.
+ if (!ok)
+ {
+ gold_error(_("Unsupported jump between ISA modes; consider "
+ "recompiling with interlinking enabled."));
+ return This::STATUS_BAD_RELOC;
+ }
+
+ // Make this the JALX opcode.
+ val = (val & ~(0x3f << 26)) | (jalx_opcode << 26);
+ }
+
+ // Try converting JAL to BAL, if the target is in range.
+ if (!parameters->options().relocatable()
+ && !cross_mode_jump
+ && ((jal_to_bal
+ && r_type == elfcpp::R_MIPS_26
+ && (val >> 26) == 0x3))) // jal addr
+ {
+ Valtype32 dest = (x << 2) | (((address + 4) >> 28) << 28);
+ int offset = dest - (address + 4);
+ if (!Bits<18>::has_overflow32(offset))
+ {
+ if (val == 0x03200008) // jr t9
+ val = 0x10000000 | (((Valtype32)offset >> 2) & 0xffff); // b addr
+ else
+ val = 0x04110000 | (((Valtype32)offset >> 2) & 0xffff); //bal addr
+ }
+ }
+
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, !parameters->options().relocatable());
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_PC16
+ static inline typename This::Status
+ relpc16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = extract_addend ? (val & 0xffff) << 2 : addend_a;
+ addend = Bits<18>::sign_extend32(addend);
+
+ Valtype32 x = psymval->value(object, addend) - address;
+ val = Bits<16>::bit_select32(val, x >> 2, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<18>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MICROMIPS_PC7_S1
+ static inline typename This::Status
+ relmicromips_pc7_s1(unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend,
+ unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = extract_addend ? (val & 0x7f) << 1 : addend_a;
+ addend = Bits<8>::sign_extend32(addend);
+
+ Valtype32 x = psymval->value(object, addend) - address;
+ val = Bits<16>::bit_select32(val, x >> 1, 0x7f);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<8>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MICROMIPS_PC10_S1
+ static inline typename This::Status
+ relmicromips_pc10_s1(unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend,
+ unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = extract_addend ? (val & 0x3ff) << 1 : addend_a;
+ addend = Bits<11>::sign_extend32(addend);
+
+ Valtype32 x = psymval->value(object, addend) - address;
+ val = Bits<16>::bit_select32(val, x >> 1, 0x3ff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<11>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MICROMIPS_PC16_S1
+ static inline typename This::Status
+ relmicromips_pc16_s1(unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address address,
+ Mips_address addend_a, bool extract_addend,
+ unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = extract_addend ? (val & 0xffff) << 1 : addend_a;
+ addend = Bits<17>::sign_extend32(addend);
+
+ Valtype32 x = psymval->value(object, addend) - address;
+ val = Bits<16>::bit_select32(val, x >> 1, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<17>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
+ static inline typename This::Status
+ relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend,
+ Mips_address address, bool gp_disp, unsigned int r_type,
+ bool extract_addend)
+ {
+ // Record the relocation. It will be resolved when we find lo16 part.
+ hi16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval,
+ addend, r_type, extract_addend, address, gp_disp));
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_HI16, R_MIPS16_HI16, R_MICROMIPS_HI16,
+ static inline typename This::Status
+ do_relhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_hi,
+ Mips_address address, bool is_gp_disp, unsigned int r_type,
+ bool extract_addend, Valtype32 addend_lo,
+ Target_mips<size, big_endian>* target)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo
+ : addend_hi);
+
+ Valtype32 value;
+ if (!is_gp_disp)
+ value = psymval->value(object, addend);
+ else
+ {
+ // For MIPS16 ABI code we generate this sequence
+ // 0: li $v0,%hi(_gp_disp)
+ // 4: addiupc $v1,%lo(_gp_disp)
+ // 8: sll $v0,16
+ // 12: addu $v0,$v1
+ // 14: move $gp,$v0
+ // So the offsets of hi and lo relocs are the same, but the
+ // base $pc is that used by the ADDIUPC instruction at $t9 + 4.
+ // ADDIUPC clears the low two bits of the instruction address,
+ // so the base is ($t9 + 4) & ~3.
+ Valtype32 gp_disp;
+ if (r_type == elfcpp::R_MIPS16_HI16)
+ gp_disp = (target->adjusted_gp_value(object)
+ - ((address + 4) & ~0x3));
+ // The microMIPS .cpload sequence uses the same assembly
+ // instructions as the traditional psABI version, but the
+ // incoming $t9 has the low bit set.
+ else if (r_type == elfcpp::R_MICROMIPS_HI16)
+ gp_disp = target->adjusted_gp_value(object) - address - 1;
+ else
+ gp_disp = target->adjusted_gp_value(object) - address;
+ value = gp_disp + addend;
+ }
+ Valtype32 x = ((value + 0x8000) >> 16) & 0xffff;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (is_gp_disp && Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
+ static inline typename This::Status
+ relgot16_local(unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, unsigned int r_type)
+ {
+ // Record the relocation. It will be resolved when we find lo16 part.
+ got16_relocs.push_back(reloc_high<size, big_endian>(view, object, psymval,
+ addend_a, r_type, extract_addend));
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
+ static inline typename This::Status
+ do_relgot16_local(unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_hi,
+ unsigned int r_type, bool extract_addend,
+ Valtype32 addend_lo, Target_mips<size, big_endian>* target)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = (extract_addend ? ((val & 0xffff) << 16) + addend_lo
+ : addend_hi);
+
+ // Find GOT page entry.
+ Mips_address value = ((psymval->value(object, addend) + 0x8000) >> 16)
+ & 0xffff;
+ value <<= 16;
+ unsigned int got_offset =
+ target->got_section()->get_got_page_offset(value, object);
+
+ // Resolve the relocation.
+ Valtype32 x = target->got_section()->gp_offset(got_offset, object);
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_LO16, R_MIPS16_LO16, R_MICROMIPS_LO16, R_MICROMIPS_HI0_LO16
+ static inline typename This::Status
+ rello16(Target_mips<size, big_endian>* target, unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, Mips_address address, bool is_gp_disp,
+ unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend = (extract_addend ? Bits<16>::sign_extend32(val & 0xffff)
+ : addend_a);
+
+ // Resolve pending R_MIPS_HI16 relocations.
+ typename std::list<reloc_high<size, big_endian> >::iterator it =
+ hi16_relocs.begin();
+ while (it != hi16_relocs.end())
+ {
+ reloc_high<size, big_endian> hi16 = *it;
+ if (hi16.psymval->value(hi16.object, 0) == psymval->value(object, 0))
+ {
+ if (do_relhi16(hi16.view, hi16.object, hi16.psymval, hi16.addend,
+ hi16.address, hi16.gp_disp, hi16.r_type,
+ hi16.extract_addend, addend, target)
+ == This::STATUS_OVERFLOW)
+ return This::STATUS_OVERFLOW;
+ it = hi16_relocs.erase(it);
+ }
+ else
+ ++it;
+ }
+
+ // Resolve pending local R_MIPS_GOT16 relocations.
+ typename std::list<reloc_high<size, big_endian> >::iterator it2 =
+ got16_relocs.begin();
+ while (it2 != got16_relocs.end())
+ {
+ reloc_high<size, big_endian> got16 = *it2;
+ if (got16.psymval->value(got16.object, 0) == psymval->value(object, 0))
+ {
+ if (do_relgot16_local(got16.view, got16.object, got16.psymval,
+ got16.addend, got16.r_type,
+ got16.extract_addend, addend,
+ target) == This::STATUS_OVERFLOW)
+ return This::STATUS_OVERFLOW;
+ it2 = got16_relocs.erase(it2);
+ }
+ else
+ ++it2;
+ }
+
+ // Resolve R_MIPS_LO16 relocation.
+ Valtype32 x;
+ if (!is_gp_disp)
+ x = psymval->value(object, addend);
+ else
+ {
+ // See the comment for R_MIPS16_HI16 above for the reason
+ // for this conditional.
+ Valtype32 gp_disp;
+ if (r_type == elfcpp::R_MIPS16_LO16)
+ gp_disp = target->adjusted_gp_value(object) - (address & ~0x3);
+ else if (r_type == elfcpp::R_MICROMIPS_LO16
+ || r_type == elfcpp::R_MICROMIPS_HI0_LO16)
+ gp_disp = target->adjusted_gp_value(object) - address + 3;
+ else
+ gp_disp = target->adjusted_gp_value(object) - address + 4;
+ // The MIPS ABI requires checking the R_MIPS_LO16 relocation
+ // for overflow. Relocations against _gp_disp are normally
+ // generated from the .cpload pseudo-op. It generates code
+ // that normally looks like this:
+
+ // lui $gp,%hi(_gp_disp)
+ // addiu $gp,$gp,%lo(_gp_disp)
+ // addu $gp,$gp,$t9
+
+ // Here $t9 holds the address of the function being called,
+ // as required by the MIPS ELF ABI. The R_MIPS_LO16
+ // relocation can easily overflow in this situation, but the
+ // R_MIPS_HI16 relocation will handle the overflow.
+ // Therefore, we consider this a bug in the MIPS ABI, and do
+ // not check for overflow here.
+ x = gp_disp + addend;
+ }
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_CALL16, R_MIPS16_CALL16, R_MICROMIPS_CALL16
+ // R_MIPS_GOT16, R_MIPS16_GOT16, R_MICROMIPS_GOT16
+ // R_MIPS_TLS_GD, R_MIPS16_TLS_GD, R_MICROMIPS_TLS_GD
+ // R_MIPS_TLS_GOTTPREL, R_MIPS16_TLS_GOTTPREL, R_MICROMIPS_TLS_GOTTPREL
+ // R_MIPS_TLS_LDM, R_MIPS16_TLS_LDM, R_MICROMIPS_TLS_LDM
+ // R_MIPS_GOT_DISP, R_MICROMIPS_GOT_DISP
+ static inline typename This::Status
+ relgot(unsigned char* view, int gp_offset, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 x = gp_offset;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_GOT_PAGE, R_MICROMIPS_GOT_PAGE
+ static inline typename This::Status
+ relgotpage(Target_mips<size, big_endian>* target, unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ Valtype32 addend = extract_addend ? val & 0xffff : addend_a;
+
+ // Find a GOT page entry that points to within 32KB of symbol + addend.
+ Mips_address value = (psymval->value(object, addend) + 0x8000) & ~0xffff;
+ unsigned int got_offset =
+ target->got_section()->get_got_page_offset(value, object);
+
+ Valtype32 x = target->got_section()->gp_offset(got_offset, object);
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_GOT_OFST, R_MICROMIPS_GOT_OFST
+ static inline typename This::Status
+ relgotofst(Target_mips<size, big_endian>* target, unsigned char* view,
+ const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, bool local, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ Valtype32 addend = extract_addend ? val & 0xffff : addend_a;
+
+ // For a local symbol, find a GOT page entry that points to within 32KB of
+ // symbol + addend. Relocation value is the offset of the GOT page entry's
+ // value from symbol + addend.
+ // For a global symbol, relocation value is addend.
+ Valtype32 x;
+ if (local)
+ {
+ // Find GOT page entry.
+ Mips_address value = ((psymval->value(object, addend) + 0x8000)
+ & ~0xffff);
+ target->got_section()->get_got_page_offset(value, object);
+
+ x = psymval->value(object, addend) - value;
+ }
+ else
+ x = addend;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return (Bits<16>::has_overflow32(x)
+ ? This::STATUS_OVERFLOW
+ : This::STATUS_OKAY);
+ }
+
+ // R_MIPS_GOT_HI16, R_MIPS_CALL_HI16,
+ // R_MICROMIPS_GOT_HI16, R_MICROMIPS_CALL_HI16
+ static inline typename This::Status
+ relgot_hi16(unsigned char* view, int gp_offset, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 x = gp_offset;
+ x = ((x + 0x8000) >> 16) & 0xffff;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_GOT_LO16, R_MIPS_CALL_LO16,
+ // R_MICROMIPS_GOT_LO16, R_MICROMIPS_CALL_LO16
+ static inline typename This::Status
+ relgot_lo16(unsigned char* view, int gp_offset, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 x = gp_offset;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_GPREL16, R_MIPS16_GPREL, R_MIPS_LITERAL, R_MICROMIPS_LITERAL
+ // R_MICROMIPS_GPREL7_S2, R_MICROMIPS_GPREL16
+ static inline typename This::Status
+ relgprel(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address gp,
+ Mips_address addend_a, bool extract_addend, bool local,
+ unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+
+ Valtype32 addend;
+ if (extract_addend)
+ {
+ if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2)
+ addend = (val & 0x7f) << 2;
+ else
+ addend = val & 0xffff;
+ // Only sign-extend the addend if it was extracted from the
+ // instruction. If the addend was separate, leave it alone,
+ // otherwise we may lose significant bits.
+ addend = Bits<16>::sign_extend32(addend);
+ }
+ else
+ addend = addend_a;
+
+ Valtype32 x = psymval->value(object, addend) - gp;
+
+ // If the symbol was local, any earlier relocatable links will
+ // have adjusted its addend with the gp offset, so compensate
+ // for that now. Don't do it for symbols forced local in this
+ // link, though, since they won't have had the gp offset applied
+ // to them before.
+ if (local)
+ x += object->gp_value();
+
+ if (r_type == elfcpp::R_MICROMIPS_GPREL7_S2)
+ val = Bits<32>::bit_select32(val, x, 0x7f);
+ else
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ if (Bits<16>::has_overflow32(x))
+ {
+ gold_error(_("small-data section exceeds 64KB; lower small-data size "
+ "limit (see option -G)"));
+ return This::STATUS_OVERFLOW;
+ }
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_GPREL32
+ static inline typename This::Status
+ relgprel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address gp,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 addend = extract_addend ? val : addend_a;
+
+ // R_MIPS_GPREL32 relocations are defined for local symbols only.
+ Valtype32 x = psymval->value(object, addend) + object->gp_value() - gp;
+ elfcpp::Swap<32, big_endian>::writeval(wv, x);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_TLS_TPREL_HI16, R_MIPS16_TLS_TPREL_HI16, R_MICROMIPS_TLS_TPREL_HI16
+ // R_MIPS_TLS_DTPREL_HI16, R_MIPS16_TLS_DTPREL_HI16,
+ // R_MICROMIPS_TLS_DTPREL_HI16
+ static inline typename This::Status
+ tlsrelhi16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Valtype32 tp_offset,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 addend = extract_addend ? val & 0xffff : addend_a;
+
+ // tls symbol values are relative to tls_segment()->vaddr()
+ Valtype32 x = ((psymval->value(object, addend) - tp_offset) + 0x8000) >> 16;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_TLS_TPREL_LO16, R_MIPS16_TLS_TPREL_LO16, R_MICROMIPS_TLS_TPREL_LO16,
+ // R_MIPS_TLS_DTPREL_LO16, R_MIPS16_TLS_DTPREL_LO16,
+ // R_MICROMIPS_TLS_DTPREL_LO16,
+ static inline typename This::Status
+ tlsrello16(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Valtype32 tp_offset,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 addend = extract_addend ? val & 0xffff : addend_a;
+
+ // tls symbol values are relative to tls_segment()->vaddr()
+ Valtype32 x = psymval->value(object, addend) - tp_offset;
+ val = Bits<32>::bit_select32(val, x, 0xffff);
+ elfcpp::Swap<32, big_endian>::writeval(wv, val);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL64,
+ // R_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL64
+ static inline typename This::Status
+ tlsrel32(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Valtype32 tp_offset,
+ Mips_address addend_a, bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 addend = extract_addend ? val : addend_a;
+
+ // tls symbol values are relative to tls_segment()->vaddr()
+ Valtype32 x = psymval->value(object, addend) - tp_offset;
+ elfcpp::Swap<32, big_endian>::writeval(wv, x);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+
+ // R_MIPS_SUB, R_MICROMIPS_SUB
+ static inline typename This::Status
+ relsub(unsigned char* view, const Mips_relobj<size, big_endian>* object,
+ const Symbol_value<size>* psymval, Mips_address addend_a,
+ bool extract_addend, unsigned int r_type)
+ {
+ mips_reloc_unshuffle(view, r_type, false);
+ Valtype32* wv = reinterpret_cast<Valtype32*>(view);
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(wv);
+ Valtype32 addend = extract_addend ? val : addend_a;
+
+ Valtype32 x = psymval->value(object, -addend);
+ elfcpp::Swap<32, big_endian>::writeval(wv, x);
+ mips_reloc_shuffle(view, r_type, false);
+ return This::STATUS_OKAY;
+ }
+};
+
+template<int size, bool big_endian>
+typename std::list<reloc_high<size, big_endian> >
+ Mips_relocate_functions<size, big_endian>::hi16_relocs;
+
+template<int size, bool big_endian>
+typename std::list<reloc_high<size, big_endian> >
+ Mips_relocate_functions<size, big_endian>::got16_relocs;
+
+// Mips_got_info methods.
+
+// Reserve GOT entry for a GOT relocation of type R_TYPE against symbol
+// SYMNDX + ADDEND, where SYMNDX is a local symbol in section SHNDX in OBJECT.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::record_local_got_symbol(
+ Mips_relobj<size, big_endian>* object, unsigned int symndx,
+ Mips_address addend, unsigned int r_type, unsigned int shndx)
+{
+ Mips_got_entry<size, big_endian>* entry =
+ new Mips_got_entry<size, big_endian>(object, symndx, addend,
+ mips_elf_reloc_tls_type(r_type),
+ shndx);
+ this->record_got_entry(entry, object);
+}
+
+// Reserve GOT entry for a GOT relocation of type R_TYPE against MIPS_SYM,
+// in OBJECT. FOR_CALL is true if the caller is only interested in
+// using the GOT entry for calls. DYN_RELOC is true if R_TYPE is a dynamic
+// relocation.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::record_global_got_symbol(
+ Mips_symbol<size>* mips_sym, Mips_relobj<size, big_endian>* object,
+ unsigned int r_type, bool dyn_reloc, bool for_call)
+{
+ if (!for_call)
+ mips_sym->set_got_not_only_for_calls();
+
+ // A global symbol in the GOT must also be in the dynamic symbol table.
+ if (!mips_sym->needs_dynsym_entry())
+ {
+ switch (mips_sym->visibility())
+ {
+ case elfcpp::STV_INTERNAL:
+ case elfcpp::STV_HIDDEN:
+ mips_sym->set_is_forced_local();
+ break;
+ default:
+ mips_sym->set_needs_dynsym_entry();
+ break;
+ }
+ }
+
+ unsigned char tls_type = mips_elf_reloc_tls_type(r_type);
+ if (tls_type == GOT_TLS_NONE)
+ this->global_got_symbols_.insert(mips_sym);
+
+ if (dyn_reloc)
+ {
+ if (mips_sym->global_got_area() == GGA_NONE)
+ mips_sym->set_global_got_area(GGA_RELOC_ONLY);
+ return;
+ }
+
+ Mips_got_entry<size, big_endian>* entry =
+ new Mips_got_entry<size, big_endian>(object, mips_sym, tls_type);
+
+ this->record_got_entry(entry, object);
+}
+
+// Add ENTRY to master GOT and to OBJECT's GOT.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::record_got_entry(
+ Mips_got_entry<size, big_endian>* entry,
+ Mips_relobj<size, big_endian>* object)
+{
+ if (this->got_entries_.find(entry) == this->got_entries_.end())
+ this->got_entries_.insert(entry);
+
+ // Create the GOT entry for the OBJECT's GOT.
+ Mips_got_info<size, big_endian>* g = object->get_or_create_got_info();
+ Mips_got_entry<size, big_endian>* entry2 =
+ new Mips_got_entry<size, big_endian>(*entry);
+
+ if (g->got_entries_.find(entry2) == g->got_entries_.end())
+ g->got_entries_.insert(entry2);
+}
+
+// Record that OBJECT has a page relocation against symbol SYMNDX and
+// that ADDEND is the addend for that relocation.
+// This function creates an upper bound on the number of GOT slots
+// required; no attempt is made to combine references to non-overridable
+// global symbols across multiple input files.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::record_got_page_entry(
+ Mips_relobj<size, big_endian>* object, unsigned int symndx, int addend)
+{
+ struct Got_page_range **range_ptr, *range;
+ int old_pages, new_pages;
+
+ // Find the Got_page_entry for this symbol.
+ Got_page_entry* entry = new Got_page_entry(object, symndx);
+ typename Got_page_entry_set::iterator it =
+ this->got_page_entries_.find(entry);
+ if (it != this->got_page_entries_.end())
+ entry = *it;
+ else
+ this->got_page_entries_.insert(entry);
+
+ // Add the same entry to the OBJECT's GOT.
+ Got_page_entry* entry2 = NULL;
+ Mips_got_info<size, big_endian>* g2 = object->get_or_create_got_info();
+ if (g2->got_page_entries_.find(entry) == g2->got_page_entries_.end())
+ {
+ entry2 = new Got_page_entry(*entry);
+ g2->got_page_entries_.insert(entry2);
+ }
+
+ // Skip over ranges whose maximum extent cannot share a page entry
+ // with ADDEND.
+ range_ptr = &entry->ranges;
+ while (*range_ptr && addend > (*range_ptr)->max_addend + 0xffff)
+ range_ptr = &(*range_ptr)->next;
+
+ // If we scanned to the end of the list, or found a range whose
+ // minimum extent cannot share a page entry with ADDEND, create
+ // a new singleton range.
+ range = *range_ptr;
+ if (!range || addend < range->min_addend - 0xffff)
+ {
+ range = new Got_page_range();
+ range->next = *range_ptr;
+ range->min_addend = addend;
+ range->max_addend = addend;
+
+ *range_ptr = range;
+ ++entry->num_pages;
+ if (entry2 != NULL)
+ ++entry2->num_pages;
+ ++this->page_gotno_;
+ ++g2->page_gotno_;
+ return;
+ }
+
+ // Remember how many pages the old range contributed.
+ old_pages = range->get_max_pages();
+
+ // Update the ranges.
+ if (addend < range->min_addend)
+ range->min_addend = addend;
+ else if (addend > range->max_addend)
+ {
+ if (range->next && addend >= range->next->min_addend - 0xffff)
+ {
+ old_pages += range->next->get_max_pages();
+ range->max_addend = range->next->max_addend;
+ range->next = range->next->next;
+ }
+ else
+ range->max_addend = addend;
+ }
+
+ // Record any change in the total estimate.
+ new_pages = range->get_max_pages();
+ if (old_pages != new_pages)
+ {
+ entry->num_pages += new_pages - old_pages;
+ if (entry2 != NULL)
+ entry2->num_pages += new_pages - old_pages;
+ this->page_gotno_ += new_pages - old_pages;
+ g2->page_gotno_ += new_pages - old_pages;
+ }
+}
+
+// Create all entries that should be in the local part of the GOT.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_local_entries(
+ Target_mips<size, big_endian>* target, Layout* layout)
+{
+ Mips_output_data_got<size, big_endian>* got = target->got_section();
+ // First two GOT entries are reserved. The first entry will be filled at
+ // runtime. The second entry will be used by some runtime loaders.
+ got->add_constant(0);
+ got->add_constant(target->mips_elf_gnu_got1_mask());
+
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (entry->is_for_local_symbol() && !entry->is_tls_entry())
+ {
+ got->add_local(entry->object(), entry->symndx(),
+ GOT_TYPE_STANDARD);
+ unsigned int got_offset = entry->object()->local_got_offset(
+ entry->symndx(), GOT_TYPE_STANDARD);
+ if (got->multi_got() && this->index_ > 0
+ && parameters->options().output_is_position_independent())
+ target->rel_dyn_section(layout)->add_local(entry->object(),
+ entry->symndx(), elfcpp::R_MIPS_REL32, got, got_offset);
+ }
+ }
+
+ this->add_page_entries(target, layout);
+
+ // Add global entries that should be in the local area.
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (!entry->is_for_global_symbol())
+ continue;
+
+ Mips_symbol<size>* mips_sym = entry->sym();
+ if (mips_sym->global_got_area() == GGA_NONE && !entry->is_tls_entry())
+ {
+ unsigned int got_type;
+ if (!got->multi_got())
+ got_type = GOT_TYPE_STANDARD;
+ else
+ got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_;
+ if (got->add_global(mips_sym, got_type))
+ {
+ mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
+ if (got->multi_got() && this->index_ > 0
+ && parameters->options().output_is_position_independent())
+ target->rel_dyn_section(layout)->add_symbolless_global_addend(
+ mips_sym, elfcpp::R_MIPS_REL32, got,
+ mips_sym->got_offset(got_type));
+ }
+ }
+ }
+}
+
+// Create GOT page entries.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_page_entries(
+ Target_mips<size, big_endian>* target, Layout* layout)
+{
+ if (this->page_gotno_ == 0)
+ return;
+
+ Mips_output_data_got<size, big_endian>* got = target->got_section();
+ this->got_page_offset_start_ = got->add_constant(0);
+ if (got->multi_got() && this->index_ > 0
+ && parameters->options().output_is_position_independent())
+ target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got,
+ this->got_page_offset_start_);
+ int num_entries = this->page_gotno_;
+ unsigned int prev_offset = this->got_page_offset_start_;
+ while (--num_entries > 0)
+ {
+ unsigned int next_offset = got->add_constant(0);
+ if (got->multi_got() && this->index_ > 0
+ && parameters->options().output_is_position_independent())
+ target->rel_dyn_section(layout)->add_absolute(elfcpp::R_MIPS_REL32, got,
+ next_offset);
+ gold_assert(next_offset == prev_offset + size/8);
+ prev_offset = next_offset;
+ }
+ this->got_page_offset_next_ = this->got_page_offset_start_;
+}
+
+// Create global GOT entries, both GGA_NORMAL and GGA_RELOC_ONLY.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_global_entries(
+ Target_mips<size, big_endian>* target, Layout* layout,
+ unsigned int non_reloc_only_global_gotno)
+{
+ Mips_output_data_got<size, big_endian>* got = target->got_section();
+ // Add GGA_NORMAL entries.
+ unsigned int count = 0;
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (!entry->is_for_global_symbol())
+ continue;
+
+ Mips_symbol<size>* mips_sym = entry->sym();
+ if (mips_sym->global_got_area() != GGA_NORMAL)
+ continue;
+
+ unsigned int got_type;
+ if (!got->multi_got())
+ got_type = GOT_TYPE_STANDARD;
+ else
+ // In multi-GOT links, global symbol can be in both primary and
+ // secondary GOT(s). By creating custom GOT type
+ // (GOT_TYPE_STANDARD_MULTIGOT + got_index) we ensure that symbol
+ // is added to secondary GOT(s).
+ got_type = GOT_TYPE_STANDARD_MULTIGOT + this->index_;
+ if (!got->add_global(mips_sym, got_type))
+ continue;
+
+ mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
+ if (got->multi_got() && this->index_ == 0)
+ count++;
+ if (got->multi_got() && this->index_ > 0)
+ {
+ if (parameters->options().output_is_position_independent()
+ || (!parameters->doing_static_link()
+ && mips_sym->is_from_dynobj() && !mips_sym->is_undefined()))
+ {
+ target->rel_dyn_section(layout)->add_global(
+ mips_sym, elfcpp::R_MIPS_REL32, got,
+ mips_sym->got_offset(got_type));
+ got->add_secondary_got_reloc(mips_sym->got_offset(got_type),
+ elfcpp::R_MIPS_REL32, mips_sym);
+ }
+ }
+ }
+
+ if (!got->multi_got() || this->index_ == 0)
+ {
+ if (got->multi_got())
+ {
+ // We need to allocate space in the primary GOT for GGA_NORMAL entries
+ // of secondary GOTs, to ensure that GOT offsets of GGA_RELOC_ONLY
+ // entries correspond to dynamic symbol indexes.
+ while (count < non_reloc_only_global_gotno)
+ {
+ got->add_constant(0);
+ ++count;
+ }
+ }
+
+ // Add GGA_RELOC_ONLY entries.
+ got->add_reloc_only_entries();
+ }
+}
+
+// Create global GOT entries that should be in the GGA_RELOC_ONLY area.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_reloc_only_entries(
+ Mips_output_data_got<size, big_endian>* got)
+{
+ for (typename Unordered_set<Mips_symbol<size>*>::iterator
+ p = this->global_got_symbols_.begin();
+ p != this->global_got_symbols_.end();
+ ++p)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+ if (mips_sym->global_got_area() == GGA_RELOC_ONLY)
+ {
+ unsigned int got_type;
+ if (!got->multi_got())
+ got_type = GOT_TYPE_STANDARD;
+ else
+ got_type = GOT_TYPE_STANDARD_MULTIGOT;
+ if (got->add_global(mips_sym, got_type))
+ mips_sym->set_global_gotoffset(mips_sym->got_offset(got_type));
+ }
+ }
+}
+
+// Create TLS GOT entries.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_tls_entries(
+ Target_mips<size, big_endian>* target, Layout* layout)
+{
+ Mips_output_data_got<size, big_endian>* got = target->got_section();
+ // Add local tls entries.
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (!entry->is_tls_entry() || !entry->is_for_local_symbol())
+ continue;
+
+ if (entry->tls_type() == GOT_TLS_GD)
+ {
+ unsigned int got_type = GOT_TYPE_TLS_PAIR;
+ unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
+ : elfcpp::R_MIPS_TLS_DTPMOD64);
+ unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32
+ : elfcpp::R_MIPS_TLS_DTPREL64);
+
+ if (!parameters->doing_static_link())
+ {
+ got->add_local_pair_with_rel(entry->object(), entry->symndx(),
+ entry->shndx(), got_type,
+ target->rel_dyn_section(layout),
+ r_type1);
+ unsigned int got_offset =
+ entry->object()->local_got_offset(entry->symndx(), got_type);
+ got->add_static_reloc(got_offset + size/8, r_type2,
+ entry->object(), entry->symndx());
+ }
+ else
+ {
+ // We are doing a static link. Mark it as belong to module 1,
+ // the executable.
+ unsigned int got_offset = got->add_constant(1);
+ entry->object()->set_local_got_offset(entry->symndx(), got_type,
+ got_offset);
+ got->add_constant(0);
+ got->add_static_reloc(got_offset + size/8, r_type2,
+ entry->object(), entry->symndx());
+ }
+ }
+ else if (entry->tls_type() == GOT_TLS_IE)
+ {
+ unsigned int got_type = GOT_TYPE_TLS_OFFSET;
+ unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32
+ : elfcpp::R_MIPS_TLS_TPREL64);
+ if (!parameters->doing_static_link())
+ got->add_local_with_rel(entry->object(), entry->symndx(), got_type,
+ target->rel_dyn_section(layout), r_type);
+ else
+ {
+ got->add_local(entry->object(), entry->symndx(), got_type);
+ unsigned int got_offset =
+ entry->object()->local_got_offset(entry->symndx(), got_type);
+ got->add_static_reloc(got_offset, r_type, entry->object(),
+ entry->symndx());
+ }
+ }
+ else if (entry->tls_type() == GOT_TLS_LDM)
+ {
+ unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
+ : elfcpp::R_MIPS_TLS_DTPMOD64);
+ unsigned int got_offset;
+ if (!parameters->doing_static_link())
+ {
+ got_offset = got->add_constant(0);
+ target->rel_dyn_section(layout)->add_local(
+ entry->object(), 0, r_type, got, got_offset);
+ }
+ else
+ // We are doing a static link. Just mark it as belong to module 1,
+ // the executable.
+ got_offset = got->add_constant(1);
+
+ got->add_constant(0);
+ got->set_tls_ldm_offset(got_offset, entry->object());
+ }
+ else
+ gold_unreachable();
+ }
+
+ // Add global tls entries.
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (!entry->is_tls_entry() || !entry->is_for_global_symbol())
+ continue;
+
+ Mips_symbol<size>* mips_sym = entry->sym();
+ if (entry->tls_type() == GOT_TLS_GD)
+ {
+ unsigned int got_type;
+ if (!got->multi_got())
+ got_type = GOT_TYPE_TLS_PAIR;
+ else
+ got_type = GOT_TYPE_TLS_PAIR_MULTIGOT + this->index_;
+ unsigned int r_type1 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPMOD32
+ : elfcpp::R_MIPS_TLS_DTPMOD64);
+ unsigned int r_type2 = (size == 32 ? elfcpp::R_MIPS_TLS_DTPREL32
+ : elfcpp::R_MIPS_TLS_DTPREL64);
+ if (!parameters->doing_static_link())
+ got->add_global_pair_with_rel(mips_sym, got_type,
+ target->rel_dyn_section(layout), r_type1, r_type2);
+ else
+ {
+ // Add a GOT pair for for R_MIPS_TLS_GD. The creates a pair of
+ // GOT entries. The first one is initialized to be 1, which is the
+ // module index for the main executable and the second one 0. A
+ // reloc of the type R_MIPS_TLS_DTPREL32/64 will be created for
+ // the second GOT entry and will be applied by gold.
+ unsigned int got_offset = got->add_constant(1);
+ mips_sym->set_got_offset(got_type, got_offset);
+ got->add_constant(0);
+ got->add_static_reloc(got_offset + size/8, r_type2, mips_sym);
+ }
+ }
+ else if (entry->tls_type() == GOT_TLS_IE)
+ {
+ unsigned int got_type;
+ if (!got->multi_got())
+ got_type = GOT_TYPE_TLS_OFFSET;
+ else
+ got_type = GOT_TYPE_TLS_OFFSET_MULTIGOT + this->index_;
+ unsigned int r_type = (size == 32 ? elfcpp::R_MIPS_TLS_TPREL32
+ : elfcpp::R_MIPS_TLS_TPREL64);
+ if (!parameters->doing_static_link())
+ got->add_global_with_rel(mips_sym, got_type,
+ target->rel_dyn_section(layout), r_type);
+ else
+ {
+ got->add_global(mips_sym, got_type);
+ unsigned int got_offset = mips_sym->got_offset(got_type);
+ got->add_static_reloc(got_offset, r_type, mips_sym);
+ }
+ }
+ else
+ gold_unreachable();
+ }
+}
+
+// Decide whether the symbol needs an entry in the global part of the primary
+// GOT, setting global_got_area accordingly. Count the number of global
+// symbols that are in the primary GOT only because they have dynamic
+// relocations R_MIPS_REL32 against them (reloc_only_gotno).
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::count_got_symbols(Symbol_table* symtab)
+{
+ for (typename Unordered_set<Mips_symbol<size>*>::iterator
+ p = this->global_got_symbols_.begin();
+ p != this->global_got_symbols_.end();
+ ++p)
+ {
+ Mips_symbol<size>* sym = *p;
+ // Make a final decision about whether the symbol belongs in the
+ // local or global GOT. Symbols that bind locally can (and in the
+ // case of forced-local symbols, must) live in the local GOT.
+ // Those that are aren't in the dynamic symbol table must also
+ // live in the local GOT.
+
+ if (!sym->should_add_dynsym_entry(symtab)
+ || (sym->got_only_for_calls()
+ ? symbol_calls_local(sym, sym->should_add_dynsym_entry(symtab))
+ : symbol_references_local(sym,
+ sym->should_add_dynsym_entry(symtab))))
+ // The symbol belongs in the local GOT. We no longer need this
+ // entry if it was only used for relocations; those relocations
+ // will be against the null or section symbol instead.
+ sym->set_global_got_area(GGA_NONE);
+ else if (sym->global_got_area() == GGA_RELOC_ONLY)
+ {
+ ++this->reloc_only_gotno_;
+ ++this->global_gotno_ ;
+ }
+ }
+}
+
+// Return the offset of GOT page entry for VALUE. Initialize the entry with
+// VALUE if it is not initialized.
+
+template<int size, bool big_endian>
+unsigned int
+Mips_got_info<size, big_endian>::get_got_page_offset(Mips_address value,
+ Mips_output_data_got<size, big_endian>* got)
+{
+ typename Got_page_offsets::iterator it = this->got_page_offsets_.find(value);
+ if (it != this->got_page_offsets_.end())
+ return it->second;
+
+ gold_assert(this->got_page_offset_next_ < this->got_page_offset_start_
+ + (size/8) * this->page_gotno_);
+
+ unsigned int got_offset = this->got_page_offset_next_;
+ this->got_page_offsets_[value] = got_offset;
+ this->got_page_offset_next_ += size/8;
+ got->update_got_entry(got_offset, value);
+ return got_offset;
+}
+
+// Remove lazy-binding stubs for global symbols in this GOT.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::remove_lazy_stubs(
+ Target_mips<size, big_endian>* target)
+{
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (entry->is_for_global_symbol())
+ target->remove_lazy_stub_entry(entry->sym());
+ }
+}
+
+// Count the number of GOT entries required.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::count_got_entries()
+{
+ for (typename Got_entry_set::iterator
+ p = this->got_entries_.begin();
+ p != this->got_entries_.end();
+ ++p)
+ {
+ this->count_got_entry(*p);
+ }
+}
+
+// Count the number of GOT entries required by ENTRY. Accumulate the result.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::count_got_entry(
+ Mips_got_entry<size, big_endian>* entry)
+{
+ if (entry->is_tls_entry())
+ this->tls_gotno_ += mips_tls_got_entries(entry->tls_type());
+ else if (entry->is_for_local_symbol()
+ || entry->sym()->global_got_area() == GGA_NONE)
+ ++this->local_gotno_;
+ else
+ ++this->global_gotno_;
+}
+
+// Add FROM's GOT entries.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_got_entries(
+ Mips_got_info<size, big_endian>* from)
+{
+ for (typename Got_entry_set::iterator
+ p = from->got_entries_.begin();
+ p != from->got_entries_.end();
+ ++p)
+ {
+ Mips_got_entry<size, big_endian>* entry = *p;
+ if (this->got_entries_.find(entry) == this->got_entries_.end())
+ {
+ Mips_got_entry<size, big_endian>* entry2 =
+ new Mips_got_entry<size, big_endian>(*entry);
+ this->got_entries_.insert(entry2);
+ this->count_got_entry(entry);
+ }
+ }
+}
+
+// Add FROM's GOT page entries.
+
+template<int size, bool big_endian>
+void
+Mips_got_info<size, big_endian>::add_got_page_entries(
+ Mips_got_info<size, big_endian>* from)
+{
+ for (typename Got_page_entry_set::iterator
+ p = from->got_page_entries_.begin();
+ p != from->got_page_entries_.end();
+ ++p)
+ {
+ Got_page_entry* entry = *p;
+ if (this->got_page_entries_.find(entry) == this->got_page_entries_.end())
+ {
+ Got_page_entry* entry2 = new Got_page_entry(*entry);
+ this->got_page_entries_.insert(entry2);
+ this->page_gotno_ += entry->num_pages;
+ }
+ }
+}
+
+// Mips_output_data_got methods.
+
+// Lay out the GOT. Add local, global and TLS entries. If GOT is
+// larger than 64K, create multi-GOT.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_got<size, big_endian>::lay_out_got(Layout* layout,
+ Symbol_table* symtab, const Input_objects* input_objects)
+{
+ // Decide which symbols need to go in the global part of the GOT and
+ // count the number of reloc-only GOT symbols.
+ this->master_got_info_->count_got_symbols(symtab);
+
+ // Count the number of GOT entries.
+ this->master_got_info_->count_got_entries();
+
+ unsigned int got_size = this->master_got_info_->got_size();
+ if (got_size > Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE)
+ this->lay_out_multi_got(layout, input_objects);
+ else
+ {
+ // Record that all objects use single GOT.
+ for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(*p);
+ if (object->get_got_info() != NULL)
+ object->set_got_info(this->master_got_info_);
+ }
+
+ this->master_got_info_->add_local_entries(this->target_, layout);
+ this->master_got_info_->add_global_entries(this->target_, layout,
+ /*not used*/-1U);
+ this->master_got_info_->add_tls_entries(this->target_, layout);
+ }
+}
+
+// Create multi-GOT. For every GOT, add local, global and TLS entries.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_got<size, big_endian>::lay_out_multi_got(Layout* layout,
+ const Input_objects* input_objects)
+{
+ // Try to merge the GOTs of input objects together, as long as they
+ // don't seem to exceed the maximum GOT size, choosing one of them
+ // to be the primary GOT.
+ this->merge_gots(input_objects);
+
+ // Every symbol that is referenced in a dynamic relocation must be
+ // present in the primary GOT.
+ this->primary_got_->set_global_gotno(this->master_got_info_->global_gotno());
+
+ // Add GOT entries.
+ unsigned int i = 0;
+ unsigned int offset = 0;
+ Mips_got_info<size, big_endian>* g = this->primary_got_;
+ do
+ {
+ g->set_index(i);
+ g->set_offset(offset);
+
+ g->add_local_entries(this->target_, layout);
+ if (i == 0)
+ g->add_global_entries(this->target_, layout,
+ (this->master_got_info_->global_gotno()
+ - this->master_got_info_->reloc_only_gotno()));
+ else
+ g->add_global_entries(this->target_, layout, /*not used*/-1U);
+ g->add_tls_entries(this->target_, layout);
+
+ // Forbid global symbols in every non-primary GOT from having
+ // lazy-binding stubs.
+ if (i > 0)
+ g->remove_lazy_stubs(this->target_);
+
+ ++i;
+ offset += g->got_size();
+ g = g->next();
+ }
+ while (g);
+}
+
+// Attempt to merge GOTs of different input objects. Try to use as much as
+// possible of the primary GOT, since it doesn't require explicit dynamic
+// relocations, but don't use objects that would reference global symbols
+// out of the addressable range. Failing the primary GOT, attempt to merge
+// with the current GOT, or finish the current GOT and then make make the new
+// GOT current.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_got<size, big_endian>::merge_gots(
+ const Input_objects* input_objects)
+{
+ gold_assert(this->primary_got_ == NULL);
+ Mips_got_info<size, big_endian>* current = NULL;
+
+ for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(*p);
+
+ Mips_got_info<size, big_endian>* g = object->get_got_info();
+ if (g == NULL)
+ continue;
+
+ g->count_got_entries();
+
+ // Work out the number of page, local and TLS entries.
+ unsigned int estimate = this->master_got_info_->page_gotno();
+ if (estimate > g->page_gotno())
+ estimate = g->page_gotno();
+ estimate += g->local_gotno() + g->tls_gotno();
+
+ // We place TLS GOT entries after both locals and globals. The globals
+ // for the primary GOT may overflow the normal GOT size limit, so be
+ // sure not to merge a GOT which requires TLS with the primary GOT in that
+ // case. This doesn't affect non-primary GOTs.
+ estimate += (g->tls_gotno() > 0 ? this->master_got_info_->global_gotno()
+ : g->global_gotno());
+
+ unsigned int max_count =
+ Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2;
+ if (estimate <= max_count)
+ {
+ // If we don't have a primary GOT, use it as
+ // a starting point for the primary GOT.
+ if (!this->primary_got_)
+ {
+ this->primary_got_ = g;
+ continue;
+ }
+
+ // Try merging with the primary GOT.
+ if (this->merge_got_with(g, object, this->primary_got_))
+ continue;
+ }
+
+ // If we can merge with the last-created GOT, do it.
+ if (current && this->merge_got_with(g, object, current))
+ continue;
+
+ // Well, we couldn't merge, so create a new GOT. Don't check if it
+ // fits; if it turns out that it doesn't, we'll get relocation
+ // overflows anyway.
+ g->set_next(current);
+ current = g;
+ }
+
+ // If we do not find any suitable primary GOT, create an empty one.
+ if (this->primary_got_ == NULL)
+ this->primary_got_ = new Mips_got_info<size, big_endian>();
+
+ // Link primary GOT with secondary GOTs.
+ this->primary_got_->set_next(current);
+}
+
+// Consider merging FROM, which is OBJECT's GOT, into TO. Return false if
+// this would lead to overflow, true if they were merged successfully.
+
+template<int size, bool big_endian>
+bool
+Mips_output_data_got<size, big_endian>::merge_got_with(
+ Mips_got_info<size, big_endian>* from,
+ Mips_relobj<size, big_endian>* object,
+ Mips_got_info<size, big_endian>* to)
+{
+ // Work out how many page entries we would need for the combined GOT.
+ unsigned int estimate = this->master_got_info_->page_gotno();
+ if (estimate >= from->page_gotno() + to->page_gotno())
+ estimate = from->page_gotno() + to->page_gotno();
+
+ // Conservatively estimate how many local and TLS entries would be needed.
+ estimate += from->local_gotno() + to->local_gotno();
+ estimate += from->tls_gotno() + to->tls_gotno();
+
+ // If we're merging with the primary got, any TLS relocations will
+ // come after the full set of global entries. Otherwise estimate those
+ // conservatively as well.
+ if (to == this->primary_got_ && (from->tls_gotno() + to->tls_gotno()) > 0)
+ estimate += this->master_got_info_->global_gotno();
+ else
+ estimate += from->global_gotno() + to->global_gotno();
+
+ // Bail out if the combined GOT might be too big.
+ unsigned int max_count =
+ Target_mips<size, big_endian>::MIPS_GOT_MAX_SIZE / (size/8) - 2;
+ if (estimate > max_count)
+ return false;
+
+ // Transfer the object's GOT information from FROM to TO.
+ to->add_got_entries(from);
+ to->add_got_page_entries(from);
+
+ // Record that OBJECT should use output GOT TO.
+ object->set_got_info(to);
+
+ return true;
+}
+
+// Write out the GOT.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_got<size, big_endian>::do_write(Output_file* of)
+{
+ // Call parent to write out GOT.
+ Output_data_got<size, big_endian>::do_write(of);
+
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+ // Needed for fixing values of .got section.
+ this->got_view_ = oview;
+
+ // Write lazy stub addresses.
+ for (typename Unordered_set<Mips_symbol<size>*>::iterator
+ p = this->master_got_info_->global_got_symbols().begin();
+ p != this->master_got_info_->global_got_symbols().end();
+ ++p)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+ if (mips_sym->has_lazy_stub())
+ {
+ Valtype* wv = reinterpret_cast<Valtype*>(
+ oview + this->get_primary_got_offset(mips_sym));
+ Valtype value =
+ this->target_->mips_stubs_section()->stub_address(mips_sym);
+ elfcpp::Swap<size, big_endian>::writeval(wv, value);
+ }
+ }
+
+ // Add +1 to GGA_NONE nonzero MIPS16 and microMIPS entries.
+ for (typename Unordered_set<Mips_symbol<size>*>::iterator
+ p = this->master_got_info_->global_got_symbols().begin();
+ p != this->master_got_info_->global_got_symbols().end();
+ ++p)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+ if (!this->multi_got()
+ && (mips_sym->is_mips16() || mips_sym->is_micromips())
+ && mips_sym->global_got_area() == GGA_NONE
+ && mips_sym->has_got_offset(GOT_TYPE_STANDARD))
+ {
+ Valtype* wv = reinterpret_cast<Valtype*>(
+ oview + mips_sym->got_offset(GOT_TYPE_STANDARD));
+ Valtype value = elfcpp::Swap<size, big_endian>::readval(wv);
+ if (value != 0)
+ {
+ value |= 1;
+ elfcpp::Swap<size, big_endian>::writeval(wv, value);
+ }
+ }
+ }
+
+ if (!this->secondary_got_relocs_.empty())
+ {
+ // Fixup for the secondary GOT R_MIPS_REL32 relocs. For global
+ // secondary GOT entries with non-zero initial value copy the value
+ // to the corresponding primary GOT entry, and set the secondary GOT
+ // entry to zero.
+ // TODO(sasa): This is workaround. It needs to be investigated further.
+
+ for (size_t i = 0; i < this->secondary_got_relocs_.size(); ++i)
+ {
+ Static_reloc& reloc(this->secondary_got_relocs_[i]);
+ if (reloc.symbol_is_global())
+ {
+ Mips_symbol<size>* gsym = reloc.symbol();
+ gold_assert(gsym != NULL);
+
+ unsigned got_offset = reloc.got_offset();
+ gold_assert(got_offset < oview_size);
+
+ // Find primary GOT entry.
+ Valtype* wv_prim = reinterpret_cast<Valtype*>(
+ oview + this->get_primary_got_offset(gsym));
+
+ // Find secondary GOT entry.
+ Valtype* wv_sec = reinterpret_cast<Valtype*>(oview + got_offset);
+
+ Valtype value = elfcpp::Swap<size, big_endian>::readval(wv_sec);
+ if (value != 0)
+ {
+ elfcpp::Swap<size, big_endian>::writeval(wv_prim, value);
+ elfcpp::Swap<size, big_endian>::writeval(wv_sec, 0);
+ gsym->set_applied_secondary_got_fixup();
+ }
+ }
+ }
+
+ of->write_output_view(offset, oview_size, oview);
+ }
+
+ // We are done if there is no fix up.
+ if (this->static_relocs_.empty())
+ return;
+
+ Output_segment* tls_segment = this->layout_->tls_segment();
+ gold_assert(tls_segment != NULL);
+
+ for (size_t i = 0; i < this->static_relocs_.size(); ++i)
+ {
+ Static_reloc& reloc(this->static_relocs_[i]);
+
+ Mips_address value;
+ if (!reloc.symbol_is_global())
+ {
+ Sized_relobj_file<size, big_endian>* object = reloc.relobj();
+ const Symbol_value<size>* psymval =
+ object->local_symbol(reloc.index());
+
+ // We are doing static linking. Issue an error and skip this
+ // relocation if the symbol is undefined or in a discarded_section.
+ bool is_ordinary;
+ unsigned int shndx = psymval->input_shndx(&is_ordinary);
+ if ((shndx == elfcpp::SHN_UNDEF)
+ || (is_ordinary
+ && shndx != elfcpp::SHN_UNDEF
+ && !object->is_section_included(shndx)
+ && !this->symbol_table_->is_section_folded(object, shndx)))
+ {
+ gold_error(_("undefined or discarded local symbol %u from "
+ " object %s in GOT"),
+ reloc.index(), reloc.relobj()->name().c_str());
+ continue;
+ }
+
+ value = psymval->value(object, 0);
+ }
+ else
+ {
+ const Mips_symbol<size>* gsym = reloc.symbol();
+ gold_assert(gsym != NULL);
+
+ // We are doing static linking. Issue an error and skip this
+ // relocation if the symbol is undefined or in a discarded_section
+ // unless it is a weakly_undefined symbol.
+ if ((gsym->is_defined_in_discarded_section() || gsym->is_undefined())
+ && !gsym->is_weak_undefined())
+ {
+ gold_error(_("undefined or discarded symbol %s in GOT"),
+ gsym->name());
+ continue;
+ }
+
+ if (!gsym->is_weak_undefined())
+ value = gsym->value();
+ else
+ value = 0;
+ }
+
+ unsigned got_offset = reloc.got_offset();
+ gold_assert(got_offset < oview_size);
+
+ Valtype* wv = reinterpret_cast<Valtype*>(oview + got_offset);
+ Valtype x;
+
+ switch (reloc.r_type())
+ {
+ case elfcpp::R_MIPS_TLS_DTPMOD32:
+ case elfcpp::R_MIPS_TLS_DTPMOD64:
+ x = value;
+ break;
+ case elfcpp::R_MIPS_TLS_DTPREL32:
+ case elfcpp::R_MIPS_TLS_DTPREL64:
+ x = value - elfcpp::DTP_OFFSET;
+ break;
+ case elfcpp::R_MIPS_TLS_TPREL32:
+ case elfcpp::R_MIPS_TLS_TPREL64:
+ x = value - elfcpp::TP_OFFSET;
+ break;
+ default:
+ gold_unreachable();
+ break;
+ }
+
+ elfcpp::Swap<size, big_endian>::writeval(wv, x);
+ }
+
+ of->write_output_view(offset, oview_size, oview);
+}
+
+// Mips_relobj methods.
+
+// Count the local symbols. The Mips backend needs to know if a symbol
+// is a MIPS16 or microMIPS function or not. For global symbols, it is easy
+// because the Symbol object keeps the ELF symbol type and st_other field.
+// For local symbol it is harder because we cannot access this information.
+// So we override the do_count_local_symbol in parent and scan local symbols to
+// mark MIPS16 and microMIPS functions. This is not the most efficient way but
+// I do not want to slow down other ports by calling a per symbol target hook
+// inside Sized_relobj_file<size, big_endian>::do_count_local_symbols.
+
+template<int size, bool big_endian>
+void
+Mips_relobj<size, big_endian>::do_count_local_symbols(
+ Stringpool_template<char>* pool,
+ Stringpool_template<char>* dynpool)
+{
+ // Ask parent to count the local symbols.
+ Sized_relobj_file<size, big_endian>::do_count_local_symbols(pool, dynpool);
+ const unsigned int loccount = this->local_symbol_count();
+ if (loccount == 0)
+ return;
+
+ // Initialize the mips16 and micromips function bit-vector.
+ this->local_symbol_is_mips16_.resize(loccount, false);
+ this->local_symbol_is_micromips_.resize(loccount, false);
+
+ // Read the symbol table section header.
+ const unsigned int symtab_shndx = this->symtab_shndx();
+ elfcpp::Shdr<size, big_endian>
+ symtabshdr(this, this->elf_file()->section_header(symtab_shndx));
+ gold_assert(symtabshdr.get_sh_type() == elfcpp::SHT_SYMTAB);
+
+ // Read the local symbols.
+ const int sym_size = elfcpp::Elf_sizes<size>::sym_size;
+ gold_assert(loccount == symtabshdr.get_sh_info());
+ off_t locsize = loccount * sym_size;
+ const unsigned char* psyms = this->get_view(symtabshdr.get_sh_offset(),
+ locsize, true, true);
+
+ // Loop over the local symbols and mark any MIPS16 or microMIPS local symbols.
+
+ // Skip the first dummy symbol.
+ psyms += sym_size;
+ for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
+ {
+ elfcpp::Sym<size, big_endian> sym(psyms);
+ unsigned char st_other = sym.get_st_other();
+ this->local_symbol_is_mips16_[i] = elfcpp::elf_st_is_mips16(st_other);
+ this->local_symbol_is_micromips_[i] =
+ elfcpp::elf_st_is_micromips(st_other);
+ }
+}
+
+// Read the symbol information.
+
+template<int size, bool big_endian>
+void
+Mips_relobj<size, big_endian>::do_read_symbols(Read_symbols_data* sd)
+{
+ // Call parent class to read symbol information.
+ Sized_relobj_file<size, big_endian>::do_read_symbols(sd);
+
+ // Read processor-specific flags in ELF file header.
+ const unsigned char* pehdr = this->get_view(elfcpp::file_header_offset,
+ elfcpp::Elf_sizes<size>::ehdr_size,
+ true, false);
+ elfcpp::Ehdr<size, big_endian> ehdr(pehdr);
+ this->processor_specific_flags_ = ehdr.get_e_flags();
+
+ // Get the section names.
+ const unsigned char* pnamesu = sd->section_names->data();
+ const char* pnames = reinterpret_cast<const char*>(pnamesu);
+
+ // Initialize the mips16 stub section bit-vectors.
+ this->section_is_mips16_fn_stub_.resize(this->shnum(), false);
+ this->section_is_mips16_call_stub_.resize(this->shnum(), false);
+ this->section_is_mips16_call_fp_stub_.resize(this->shnum(), false);
+
+ const size_t shdr_size = elfcpp::Elf_sizes<size>::shdr_size;
+ const unsigned char* pshdrs = sd->section_headers->data();
+ const unsigned char* ps = pshdrs + shdr_size;
+ for (unsigned int i = 1; i < this->shnum(); ++i, ps += shdr_size)
+ {
+ elfcpp::Shdr<size, big_endian> shdr(ps);
+
+ if (shdr.get_sh_type() == elfcpp::SHT_MIPS_REGINFO)
+ {
+ // Read the gp value that was used to create this object. We need the
+ // gp value while processing relocs. The .reginfo section is not used
+ // in the 64-bit MIPS ELF ABI.
+ section_offset_type section_offset = shdr.get_sh_offset();
+ section_size_type section_size =
+ convert_to_section_size_type(shdr.get_sh_size());
+ const unsigned char* view =
+ this->get_view(section_offset, section_size, true, false);
+
+ this->gp_ = elfcpp::Swap<size, big_endian>::readval(view + 20);
+
+ // Read the rest of .reginfo.
+ this->gprmask_ = elfcpp::Swap<size, big_endian>::readval(view);
+ this->cprmask1_ = elfcpp::Swap<size, big_endian>::readval(view + 4);
+ this->cprmask2_ = elfcpp::Swap<size, big_endian>::readval(view + 8);
+ this->cprmask3_ = elfcpp::Swap<size, big_endian>::readval(view + 12);
+ this->cprmask4_ = elfcpp::Swap<size, big_endian>::readval(view + 16);
+ }
+
+ const char* name = pnames + shdr.get_sh_name();
+ this->section_is_mips16_fn_stub_[i] = is_prefix_of(".mips16.fn", name);
+ this->section_is_mips16_call_stub_[i] =
+ is_prefix_of(".mips16.call.", name);
+ this->section_is_mips16_call_fp_stub_[i] =
+ is_prefix_of(".mips16.call.fp.", name);
+
+ if (strcmp(name, ".pdr") == 0)
+ {
+ gold_assert(this->pdr_shndx_ == -1U);
+ this->pdr_shndx_ = i;
+ }
+ }
+}
+
+// Discard MIPS16 stub secions that are not needed.
+
+template<int size, bool big_endian>
+void
+Mips_relobj<size, big_endian>::discard_mips16_stub_sections(Symbol_table* symtab)
+{
+ for (typename Mips16_stubs_int_map::const_iterator
+ it = this->mips16_stub_sections_.begin();
+ it != this->mips16_stub_sections_.end(); ++it)
+ {
+ Mips16_stub_section<size, big_endian>* stub_section = it->second;
+ if (!stub_section->is_target_found())
+ {
+ gold_error(_("no relocation found in mips16 stub section '%s'"),
+ stub_section->object()
+ ->section_name(stub_section->shndx()).c_str());
+ }
+
+ bool discard = false;
+ if (stub_section->is_for_local_function())
+ {
+ if (stub_section->is_fn_stub())
+ {
+ // This stub is for a local symbol. This stub will only
+ // be needed if there is some relocation in this object,
+ // other than a 16 bit function call, which refers to this
+ // symbol.
+ if (!this->has_local_non_16bit_call_relocs(stub_section->r_sym()))
+ discard = true;
+ else
+ this->add_local_mips16_fn_stub(stub_section);
+ }
+ else
+ {
+ // This stub is for a local symbol. This stub will only
+ // be needed if there is some relocation (R_MIPS16_26) in
+ // this object that refers to this symbol.
+ gold_assert(stub_section->is_call_stub()
+ || stub_section->is_call_fp_stub());
+ if (!this->has_local_16bit_call_relocs(stub_section->r_sym()))
+ discard = true;
+ else
+ this->add_local_mips16_call_stub(stub_section);
+ }
+ }
+ else
+ {
+ Mips_symbol<size>* gsym = stub_section->gsym();
+ if (stub_section->is_fn_stub())
+ {
+ if (gsym->has_mips16_fn_stub())
+ // We already have a stub for this function.
+ discard = true;
+ else
+ {
+ gsym->set_mips16_fn_stub(stub_section);
+ if (gsym->should_add_dynsym_entry(symtab))
+ {
+ // If we have a MIPS16 function with a stub, the
+ // dynamic symbol must refer to the stub, since only
+ // the stub uses the standard calling conventions.
+ gsym->set_need_fn_stub();
+ if (gsym->is_from_dynobj())
+ gsym->set_needs_dynsym_value();
+ }
+ }
+ if (!gsym->need_fn_stub())
+ discard = true;
+ }
+ else if (stub_section->is_call_stub())
+ {
+ if (gsym->is_mips16())
+ // We don't need the call_stub; this is a 16 bit
+ // function, so calls from other 16 bit functions are
+ // OK.
+ discard = true;
+ else if (gsym->has_mips16_call_stub())
+ // We already have a stub for this function.
+ discard = true;
+ else
+ gsym->set_mips16_call_stub(stub_section);
+ }
+ else
+ {
+ gold_assert(stub_section->is_call_fp_stub());
+ if (gsym->is_mips16())
+ // We don't need the call_stub; this is a 16 bit
+ // function, so calls from other 16 bit functions are
+ // OK.
+ discard = true;
+ else if (gsym->has_mips16_call_fp_stub())
+ // We already have a stub for this function.
+ discard = true;
+ else
+ gsym->set_mips16_call_fp_stub(stub_section);
+ }
+ }
+ if (discard)
+ this->set_output_section(stub_section->shndx(), NULL);
+ }
+}
+
+// Mips_output_data_la25_stub methods.
+
+// Template for standard LA25 stub.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_la25_stub<size, big_endian>::la25_stub_entry[] =
+{
+ 0x3c190000, // lui $25,%hi(func)
+ 0x08000000, // j func
+ 0x27390000, // add $25,$25,%lo(func)
+ 0x00000000 // nop
+};
+
+// Template for microMIPS LA25 stub.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_la25_stub<size, big_endian>::la25_stub_micromips_entry[] =
+{
+ 0x41b9, 0x0000, // lui t9,%hi(func)
+ 0xd400, 0x0000, // j func
+ 0x3339, 0x0000, // addiu t9,t9,%lo(func)
+ 0x0000, 0x0000 // nop
+};
+
+// Create la25 stub for a symbol.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_la25_stub<size, big_endian>::create_la25_stub(
+ Symbol_table* symtab, Target_mips<size, big_endian>* target,
+ Mips_symbol<size>* gsym)
+{
+ if (!gsym->has_la25_stub())
+ {
+ gsym->set_la25_stub_offset(this->symbols_.size() * 16);
+ this->symbols_.insert(gsym);
+ this->create_stub_symbol(gsym, symtab, target, 16);
+ }
+}
+
+// Create a symbol for SYM stub's value and size, to help make the disassembly
+// easier to read.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_la25_stub<size, big_endian>::create_stub_symbol(
+ Mips_symbol<size>* sym, Symbol_table* symtab,
+ Target_mips<size, big_endian>* target, uint64_t symsize)
+{
+ std::string name(".pic.");
+ name += sym->name();
+
+ unsigned int offset = sym->la25_stub_offset();
+ if (sym->is_micromips())
+ offset |= 1;
+
+ // Make it a local function.
+ Symbol* new_sym = symtab->define_in_output_data(name.c_str(), NULL,
+ Symbol_table::PREDEFINED,
+ target->la25_stub_section(),
+ offset, symsize, elfcpp::STT_FUNC,
+ elfcpp::STB_LOCAL,
+ elfcpp::STV_DEFAULT, 0,
+ false, false);
+ new_sym->set_is_forced_local();
+}
+
+// Write out la25 stubs. This uses the hand-coded instructions above,
+// and adjusts them as needed.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_la25_stub<size, big_endian>::do_write(Output_file* of)
+{
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+ for (typename Unordered_set<Mips_symbol<size>*>::iterator
+ p = this->symbols_.begin();
+ p != this->symbols_.end();
+ ++p)
+ {
+ Mips_symbol<size>* sym = *p;
+ unsigned char* pov = oview + sym->la25_stub_offset();
+
+ Mips_address target = sym->value();
+ if (!sym->is_micromips())
+ {
+ elfcpp::Swap<32, big_endian>::writeval(pov,
+ la25_stub_entry[0] | (((target + 0x8000) >> 16) & 0xffff));
+ elfcpp::Swap<32, big_endian>::writeval(pov + 4,
+ la25_stub_entry[1] | ((target >> 2) & 0x3ffffff));
+ elfcpp::Swap<32, big_endian>::writeval(pov + 8,
+ la25_stub_entry[2] | (target & 0xffff));
+ elfcpp::Swap<32, big_endian>::writeval(pov + 12, la25_stub_entry[3]);
+ }
+ else
+ {
+ target |= 1;
+ // First stub instruction. Paste high 16-bits of the target.
+ elfcpp::Swap<16, big_endian>::writeval(pov,
+ la25_stub_micromips_entry[0]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2,
+ ((target + 0x8000) >> 16) & 0xffff);
+ // Second stub instruction. Paste low 26-bits of the target, shifted
+ // right by 1.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4,
+ la25_stub_micromips_entry[2] | ((target >> 17) & 0x3ff));
+ elfcpp::Swap<16, big_endian>::writeval(pov + 6,
+ la25_stub_micromips_entry[3] | ((target >> 1) & 0xffff));
+ // Third stub instruction. Paste low 16-bits of the target.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 8,
+ la25_stub_micromips_entry[4]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 10, target & 0xffff);
+ // Fourth stub instruction.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 12,
+ la25_stub_micromips_entry[6]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 14,
+ la25_stub_micromips_entry[7]);
+ }
+ }
+
+ of->write_output_view(offset, oview_size, oview);
+}
+
+// Mips_output_data_plt methods.
+
+// The format of the first PLT entry in an O32 executable.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_o32[] =
+{
+ 0x3c1c0000, // lui $28, %hi(&GOTPLT[0])
+ 0x8f990000, // lw $25, %lo(&GOTPLT[0])($28)
+ 0x279c0000, // addiu $28, $28, %lo(&GOTPLT[0])
+ 0x031cc023, // subu $24, $24, $28
+ 0x03e07821, // move $15, $31 # 32-bit move (addu)
+ 0x0018c082, // srl $24, $24, 2
+ 0x0320f809, // jalr $25
+ 0x2718fffe // subu $24, $24, 2
+};
+
+// The format of the first PLT entry in an N32 executable. Different
+// because gp ($28) is not available; we use t2 ($14) instead.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n32[] =
+{
+ 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
+ 0x8dd90000, // lw $25, %lo(&GOTPLT[0])($14)
+ 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
+ 0x030ec023, // subu $24, $24, $14
+ 0x03e07821, // move $15, $31 # 32-bit move (addu)
+ 0x0018c082, // srl $24, $24, 2
+ 0x0320f809, // jalr $25
+ 0x2718fffe // subu $24, $24, 2
+};
+
+// The format of the first PLT entry in an N64 executable. Different
+// from N32 because of the increased size of GOT entries.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::plt0_entry_n64[] =
+{
+ 0x3c0e0000, // lui $14, %hi(&GOTPLT[0])
+ 0xddd90000, // ld $25, %lo(&GOTPLT[0])($14)
+ 0x25ce0000, // addiu $14, $14, %lo(&GOTPLT[0])
+ 0x030ec023, // subu $24, $24, $14
+ 0x03e07821, // move $15, $31 # 64-bit move (daddu)
+ 0x0018c0c2, // srl $24, $24, 3
+ 0x0320f809, // jalr $25
+ 0x2718fffe // subu $24, $24, 2
+};
+
+// The format of the microMIPS first PLT entry in an O32 executable.
+// We rely on v0 ($2) rather than t8 ($24) to contain the address
+// of the GOTPLT entry handled, so this stub may only be used when
+// all the subsequent PLT entries are microMIPS code too.
+//
+// The trailing NOP is for alignment and correct disassembly only.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::
+plt0_entry_micromips_o32[] =
+{
+ 0x7980, 0x0000, // addiupc $3, (&GOTPLT[0]) - .
+ 0xff23, 0x0000, // lw $25, 0($3)
+ 0x0535, // subu $2, $2, $3
+ 0x2525, // srl $2, $2, 2
+ 0x3302, 0xfffe, // subu $24, $2, 2
+ 0x0dff, // move $15, $31
+ 0x45f9, // jalrs $25
+ 0x0f83, // move $28, $3
+ 0x0c00 // nop
+};
+
+// The format of the microMIPS first PLT entry in an O32 executable
+// in the insn32 mode.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::
+plt0_entry_micromips32_o32[] =
+{
+ 0x41bc, 0x0000, // lui $28, %hi(&GOTPLT[0])
+ 0xff3c, 0x0000, // lw $25, %lo(&GOTPLT[0])($28)
+ 0x339c, 0x0000, // addiu $28, $28, %lo(&GOTPLT[0])
+ 0x0398, 0xc1d0, // subu $24, $24, $28
+ 0x001f, 0x7950, // move $15, $31
+ 0x0318, 0x1040, // srl $24, $24, 2
+ 0x03f9, 0x0f3c, // jalr $25
+ 0x3318, 0xfffe // subu $24, $24, 2
+};
+
+// The format of subsequent standard entries in the PLT.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry[] =
+{
+ 0x3c0f0000, // lui $15, %hi(.got.plt entry)
+ 0x8df90000, // l[wd] $25, %lo(.got.plt entry)($15)
+ 0x03200008, // jr $25
+ 0x25f80000 // addiu $24, $15, %lo(.got.plt entry)
+};
+
+// The format of subsequent MIPS16 o32 PLT entries. We use v1 ($3) as a
+// temporary because t8 ($24) and t9 ($25) are not directly addressable.
+// Note that this differs from the GNU ld which uses both v0 ($2) and v1 ($3).
+// We cannot use v0 because MIPS16 call stubs from the CS toolchain expect
+// target function address in register v0.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::plt_entry_mips16_o32[] =
+{
+ 0xb303, // lw $3, 12($pc)
+ 0x651b, // move $24, $3
+ 0x9b60, // lw $3, 0($3)
+ 0xeb00, // jr $3
+ 0x653b, // move $25, $3
+ 0x6500, // nop
+ 0x0000, 0x0000 // .word (.got.plt entry)
+};
+
+// The format of subsequent microMIPS o32 PLT entries. We use v0 ($2)
+// as a temporary because t8 ($24) is not addressable with ADDIUPC.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::
+plt_entry_micromips_o32[] =
+{
+ 0x7900, 0x0000, // addiupc $2, (.got.plt entry) - .
+ 0xff22, 0x0000, // lw $25, 0($2)
+ 0x4599, // jr $25
+ 0x0f02 // move $24, $2
+};
+
+// The format of subsequent microMIPS o32 PLT entries in the insn32 mode.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_plt<size, big_endian>::
+plt_entry_micromips32_o32[] =
+{
+ 0x41af, 0x0000, // lui $15, %hi(.got.plt entry)
+ 0xff2f, 0x0000, // lw $25, %lo(.got.plt entry)($15)
+ 0x0019, 0x0f3c, // jr $25
+ 0x330f, 0x0000 // addiu $24, $15, %lo(.got.plt entry)
+};
+
+// Add an entry to the PLT for a symbol referenced by r_type relocation.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_plt<size, big_endian>::add_entry(Mips_symbol<size>* gsym,
+ unsigned int r_type)
+{
+ gold_assert(!gsym->has_plt_offset());
+
+ // Final PLT offset for a symbol will be set in method set_plt_offsets().
+ gsym->set_plt_offset(this->entry_count() * sizeof(plt_entry)
+ + sizeof(plt0_entry_o32));
+ this->symbols_.push_back(gsym);
+
+ // Record whether the relocation requires a standard MIPS
+ // or a compressed code entry.
+ if (jal_reloc(r_type))
+ {
+ if (r_type == elfcpp::R_MIPS_26)
+ gsym->set_needs_mips_plt(true);
+ else
+ gsym->set_needs_comp_plt(true);
+ }
+
+ section_offset_type got_offset = this->got_plt_->current_data_size();
+
+ // Every PLT entry needs a GOT entry which points back to the PLT
+ // entry (this will be changed by the dynamic linker, normally
+ // lazily when the function is called).
+ this->got_plt_->set_current_data_size(got_offset + size/8);
+
+ gsym->set_needs_dynsym_entry();
+ this->rel_->add_global(gsym, elfcpp::R_MIPS_JUMP_SLOT, this->got_plt_,
+ got_offset);
+}
+
+// Set final PLT offsets. For each symbol, determine whether standard or
+// compressed (MIPS16 or microMIPS) PLT entry is used.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_plt<size, big_endian>::set_plt_offsets()
+{
+ // The sizes of individual PLT entries.
+ unsigned int plt_mips_entry_size = this->standard_plt_entry_size();
+ unsigned int plt_comp_entry_size = (!this->target_->is_output_newabi()
+ ? this->compressed_plt_entry_size() : 0);
+
+ for (typename std::vector<Mips_symbol<size>*>::const_iterator
+ p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+
+ // There are no defined MIPS16 or microMIPS PLT entries for n32 or n64,
+ // so always use a standard entry there.
+ //
+ // If the symbol has a MIPS16 call stub and gets a PLT entry, then
+ // all MIPS16 calls will go via that stub, and there is no benefit
+ // to having a MIPS16 entry. And in the case of call_stub a
+ // standard entry actually has to be used as the stub ends with a J
+ // instruction.
+ if (this->target_->is_output_newabi()
+ || mips_sym->has_mips16_call_stub()
+ || mips_sym->has_mips16_call_fp_stub())
+ {
+ mips_sym->set_needs_mips_plt(true);
+ mips_sym->set_needs_comp_plt(false);
+ }
+
+ // Otherwise, if there are no direct calls to the function, we
+ // have a free choice of whether to use standard or compressed
+ // entries. Prefer microMIPS entries if the object is known to
+ // contain microMIPS code, so that it becomes possible to create
+ // pure microMIPS binaries. Prefer standard entries otherwise,
+ // because MIPS16 ones are no smaller and are usually slower.
+ if (!mips_sym->needs_mips_plt() && !mips_sym->needs_comp_plt())
+ {
+ if (this->target_->is_output_micromips())
+ mips_sym->set_needs_comp_plt(true);
+ else
+ mips_sym->set_needs_mips_plt(true);
+ }
+
+ if (mips_sym->needs_mips_plt())
+ {
+ mips_sym->set_mips_plt_offset(this->plt_mips_offset_);
+ this->plt_mips_offset_ += plt_mips_entry_size;
+ }
+ if (mips_sym->needs_comp_plt())
+ {
+ mips_sym->set_comp_plt_offset(this->plt_comp_offset_);
+ this->plt_comp_offset_ += plt_comp_entry_size;
+ }
+ }
+
+ // Figure out the size of the PLT header if we know that we are using it.
+ if (this->plt_mips_offset_ + this->plt_comp_offset_ != 0)
+ this->plt_header_size_ = this->get_plt_header_size();
+}
+
+// Write out the PLT. This uses the hand-coded instructions above,
+// and adjusts them as needed.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_plt<size, big_endian>::do_write(Output_file* of)
+{
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+ const off_t gotplt_file_offset = this->got_plt_->offset();
+ const section_size_type gotplt_size =
+ convert_to_section_size_type(this->got_plt_->data_size());
+ unsigned char* const gotplt_view = of->get_output_view(gotplt_file_offset,
+ gotplt_size);
+ unsigned char* pov = oview;
+
+ Mips_address plt_address = this->address();
+
+ // Calculate the address of .got.plt.
+ Mips_address gotplt_addr = this->got_plt_->address();
+ Mips_address gotplt_addr_high = ((gotplt_addr + 0x8000) >> 16) & 0xffff;
+ Mips_address gotplt_addr_low = gotplt_addr & 0xffff;
+
+ // The PLT sequence is not safe for N64 if .got.plt's address can
+ // not be loaded in two instructions.
+ gold_assert((gotplt_addr & ~(Mips_address) 0x7fffffff) == 0
+ || ~(gotplt_addr | 0x7fffffff) == 0);
+
+ // Write the PLT header.
+ const uint32_t* plt0_entry = this->get_plt_header_entry();
+ if (plt0_entry == plt0_entry_micromips_o32)
+ {
+ // Write microMIPS PLT header.
+ gold_assert(gotplt_addr % 4 == 0);
+
+ Mips_address gotpc_offset = gotplt_addr - ((plt_address | 3) ^ 3);
+
+ // ADDIUPC has a span of +/-16MB, check we're in range.
+ if (gotpc_offset + 0x1000000 >= 0x2000000)
+ {
+ gold_error(_(".got.plt offset of %ld from .plt beyond the range of "
+ "ADDIUPC"), (long)gotpc_offset);
+ return;
+ }
+
+ elfcpp::Swap<16, big_endian>::writeval(pov,
+ plt0_entry[0] | ((gotpc_offset >> 18) & 0x7f));
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2,
+ (gotpc_offset >> 2) & 0xffff);
+ pov += 4;
+ for (unsigned int i = 2;
+ i < (sizeof(plt0_entry_micromips_o32)
+ / sizeof(plt0_entry_micromips_o32[0]));
+ i++)
+ {
+ elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]);
+ pov += 2;
+ }
+ }
+ else if (plt0_entry == plt0_entry_micromips32_o32)
+ {
+ // Write microMIPS PLT header in insn32 mode.
+ elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[0]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2, gotplt_addr_high);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4, plt0_entry[2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 6, gotplt_addr_low);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 8, plt0_entry[4]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 10, gotplt_addr_low);
+ pov += 12;
+ for (unsigned int i = 6;
+ i < (sizeof(plt0_entry_micromips32_o32)
+ / sizeof(plt0_entry_micromips32_o32[0]));
+ i++)
+ {
+ elfcpp::Swap<16, big_endian>::writeval(pov, plt0_entry[i]);
+ pov += 2;
+ }
+ }
+ else
+ {
+ // Write standard PLT header.
+ elfcpp::Swap<32, big_endian>::writeval(pov,
+ plt0_entry[0] | gotplt_addr_high);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 4,
+ plt0_entry[1] | gotplt_addr_low);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 8,
+ plt0_entry[2] | gotplt_addr_low);
+ pov += 12;
+ for (int i = 3; i < 8; i++)
+ {
+ elfcpp::Swap<32, big_endian>::writeval(pov, plt0_entry[i]);
+ pov += 4;
+ }
+ }
+
+
+ unsigned char* gotplt_pov = gotplt_view;
+ unsigned int got_entry_size = size/8; // TODO(sasa): MIPS_ELF_GOT_SIZE
+
+ // The first two entries in .got.plt are reserved.
+ elfcpp::Swap<size, big_endian>::writeval(gotplt_pov, 0);
+ elfcpp::Swap<size, big_endian>::writeval(gotplt_pov + got_entry_size, 0);
+
+ unsigned int gotplt_offset = 2 * got_entry_size;
+ gotplt_pov += 2 * got_entry_size;
+
+ // Calculate the address of the PLT header.
+ Mips_address header_address = (plt_address
+ + (this->is_plt_header_compressed() ? 1 : 0));
+
+ // Initialize compressed PLT area view.
+ unsigned char* pov2 = pov + this->plt_mips_offset_;
+
+ // Write the PLT entries.
+ for (typename std::vector<Mips_symbol<size>*>::const_iterator
+ p = this->symbols_.begin();
+ p != this->symbols_.end();
+ ++p, gotplt_pov += got_entry_size, gotplt_offset += got_entry_size)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+
+ // Calculate the address of the .got.plt entry.
+ uint32_t gotplt_entry_addr = (gotplt_addr + gotplt_offset);
+ uint32_t gotplt_entry_addr_hi = (((gotplt_entry_addr + 0x8000) >> 16)
+ & 0xffff);
+ uint32_t gotplt_entry_addr_lo = gotplt_entry_addr & 0xffff;
+
+ // Initially point the .got.plt entry at the PLT header.
+ if (this->target_->is_output_n64())
+ elfcpp::Swap<64, big_endian>::writeval(gotplt_pov, header_address);
+ else
+ elfcpp::Swap<32, big_endian>::writeval(gotplt_pov, header_address);
+
+ // Now handle the PLT itself. First the standard entry.
+ if (mips_sym->has_mips_plt_offset())
+ {
+ // Pick the load opcode (LW or LD).
+ uint64_t load = this->target_->is_output_n64() ? 0xdc000000
+ : 0x8c000000;
+
+ // Fill in the PLT entry itself.
+ elfcpp::Swap<32, big_endian>::writeval(pov,
+ plt_entry[0] | gotplt_entry_addr_hi);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 4,
+ plt_entry[1] | gotplt_entry_addr_lo | load);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 8, plt_entry[2]);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 12,
+ plt_entry[3] | gotplt_entry_addr_lo);
+ pov += 16;
+ }
+
+ // Now the compressed entry. They come after any standard ones.
+ if (mips_sym->has_comp_plt_offset())
+ {
+ if (!this->target_->is_output_micromips())
+ {
+ // Write MIPS16 PLT entry.
+ const uint32_t* plt_entry = plt_entry_mips16_o32;
+
+ elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 2, plt_entry[1]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
+ elfcpp::Swap<32, big_endian>::writeval(pov2 + 12,
+ gotplt_entry_addr);
+ pov2 += 16;
+ }
+ else if (this->target_->use_32bit_micromips_instructions())
+ {
+ // Write microMIPS PLT entry in insn32 mode.
+ const uint32_t* plt_entry = plt_entry_micromips32_o32;
+
+ elfcpp::Swap<16, big_endian>::writeval(pov2, plt_entry[0]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 2,
+ gotplt_entry_addr_hi);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 6,
+ gotplt_entry_addr_lo);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 12, plt_entry[6]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 14,
+ gotplt_entry_addr_lo);
+ pov2 += 16;
+ }
+ else
+ {
+ // Write microMIPS PLT entry.
+ const uint32_t* plt_entry = plt_entry_micromips_o32;
+
+ gold_assert(gotplt_entry_addr % 4 == 0);
+
+ Mips_address loc_address = plt_address + pov2 - oview;
+ int gotpc_offset = gotplt_entry_addr - ((loc_address | 3) ^ 3);
+
+ // ADDIUPC has a span of +/-16MB, check we're in range.
+ if (gotpc_offset + 0x1000000 >= 0x2000000)
+ {
+ gold_error(_(".got.plt offset of %ld from .plt beyond the "
+ "range of ADDIUPC"), (long)gotpc_offset);
+ return;
+ }
+
+ elfcpp::Swap<16, big_endian>::writeval(pov2,
+ plt_entry[0] | ((gotpc_offset >> 18) & 0x7f));
+ elfcpp::Swap<16, big_endian>::writeval(
+ pov2 + 2, (gotpc_offset >> 2) & 0xffff);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 4, plt_entry[2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 6, plt_entry[3]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 8, plt_entry[4]);
+ elfcpp::Swap<16, big_endian>::writeval(pov2 + 10, plt_entry[5]);
+ pov2 += 12;
+ }
+ }
+ }
+
+ // Check the number of bytes written for standard entries.
+ gold_assert(static_cast<section_size_type>(
+ pov - oview - this->plt_header_size_) == this->plt_mips_offset_);
+ // Check the number of bytes written for compressed entries.
+ gold_assert((static_cast<section_size_type>(pov2 - pov)
+ == this->plt_comp_offset_));
+ // Check the total number of bytes written.
+ gold_assert(static_cast<section_size_type>(pov2 - oview) == oview_size);
+
+ gold_assert(static_cast<section_size_type>(gotplt_pov - gotplt_view)
+ == gotplt_size);
+
+ of->write_output_view(offset, oview_size, oview);
+ of->write_output_view(gotplt_file_offset, gotplt_size, gotplt_view);
+}
+
+// Mips_output_data_mips_stubs methods.
+
+// The format of the lazy binding stub when dynamic symbol count is less than
+// 64K, dynamic symbol index is less than 32K, and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1[4] =
+{
+ 0x8f998010, // lw t9,0x8010(gp)
+ 0x03e07821, // addu t7,ra,zero
+ 0x0320f809, // jalr t9,ra
+ 0x24180000 // addiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the lazy binding stub when dynamic symbol count is less than
+// 64K, dynamic symbol index is less than 32K, and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_1_n64[4] =
+{
+ 0xdf998010, // ld t9,0x8010(gp)
+ 0x03e0782d, // daddu t7,ra,zero
+ 0x0320f809, // jalr t9,ra
+ 0x64180000 // daddiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the lazy binding stub when dynamic symbol count is less than
+// 64K, dynamic symbol index is between 32K and 64K, and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2[4] =
+{
+ 0x8f998010, // lw t9,0x8010(gp)
+ 0x03e07821, // addu t7,ra,zero
+ 0x0320f809, // jalr t9,ra
+ 0x34180000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the lazy binding stub when dynamic symbol count is less than
+// 64K, dynamic symbol index is between 32K and 64K, and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_normal_2_n64[4] =
+{
+ 0xdf998010, // ld t9,0x8010(gp)
+ 0x03e0782d, // daddu t7,ra,zero
+ 0x0320f809, // jalr t9,ra
+ 0x34180000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the lazy binding stub when dynamic symbol count is greater than
+// 64K, and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big[5] =
+{
+ 0x8f998010, // lw t9,0x8010(gp)
+ 0x03e07821, // addu t7,ra,zero
+ 0x3c180000, // lui t8,DYN_INDEX
+ 0x0320f809, // jalr t9,ra
+ 0x37180000 // ori t8,t8,DYN_INDEX
+};
+
+// The format of the lazy binding stub when dynamic symbol count is greater than
+// 64K, and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_big_n64[5] =
+{
+ 0xdf998010, // ld t9,0x8010(gp)
+ 0x03e0782d, // daddu t7,ra,zero
+ 0x3c180000, // lui t8,DYN_INDEX
+ 0x0320f809, // jalr t9,ra
+ 0x37180000 // ori t8,t8,DYN_INDEX
+};
+
+// microMIPS stubs.
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// less than 64K, dynamic symbol index is less than 32K, and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_1[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x45d9, // jalr t9
+ 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// less than 64K, dynamic symbol index is less than 32K, and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips_normal_1_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x45d9, // jalr t9
+ 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol
+// count is less than 64K, dynamic symbol index is between 32K and 64K,
+// and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_normal_2[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x45d9, // jalr t9
+ 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol
+// count is less than 64K, dynamic symbol index is between 32K and 64K,
+// and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips_normal_2_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x45d9, // jalr t9
+ 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// greater than 64K, and ABI is not N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x41b8, 0x0000, // lui t8,DYN_INDEX
+ 0x45d9, // jalr t9
+ 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// greater than 64K, and ABI is N64.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips_big_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x0dff, // move t7,ra
+ 0x41b8, 0x0000, // lui t8,DYN_INDEX
+ 0x45d9, // jalr t9
+ 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
+};
+
+// 32-bit microMIPS stubs.
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// less than 64K, dynamic symbol index is less than 32K, ABI is not N64, and we
+// can use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips32_normal_1[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x001f, 0x7950, // addu t7,ra,zero
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x3300, 0x0000 // addiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// less than 64K, dynamic symbol index is less than 32K, ABI is N64, and we can
+// use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips32_normal_1_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x581f, 0x7950, // daddu t7,ra,zero
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x5f00, 0x0000 // daddiu t8,zero,DYN_INDEX sign extended
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol
+// count is less than 64K, dynamic symbol index is between 32K and 64K,
+// ABI is not N64, and we can use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips32_normal_2[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x001f, 0x7950, // addu t7,ra,zero
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol
+// count is less than 64K, dynamic symbol index is between 32K and 64K,
+// ABI is N64, and we can use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::
+lazy_stub_micromips32_normal_2_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x581f, 0x7950, // daddu t7,ra,zero
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x5300, 0x0000 // ori t8,zero,DYN_INDEX unsigned
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// greater than 64K, ABI is not N64, and we can use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big[] =
+{
+ 0xff3c, 0x8010, // lw t9,0x8010(gp)
+ 0x001f, 0x7950, // addu t7,ra,zero
+ 0x41b8, 0x0000, // lui t8,DYN_INDEX
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
+};
+
+// The format of the microMIPS lazy binding stub when dynamic symbol count is
+// greater than 64K, ABI is N64, and we can use only 32-bit instructions.
+template<int size, bool big_endian>
+const uint32_t
+Mips_output_data_mips_stubs<size, big_endian>::lazy_stub_micromips32_big_n64[] =
+{
+ 0xdf3c, 0x8010, // ld t9,0x8010(gp)
+ 0x581f, 0x7950, // daddu t7,ra,zero
+ 0x41b8, 0x0000, // lui t8,DYN_INDEX
+ 0x03f9, 0x0f3c, // jalr ra,t9
+ 0x5318, 0x0000 // ori t8,t8,DYN_INDEX
+};
+
+// Create entry for a symbol.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_mips_stubs<size, big_endian>::make_entry(
+ Mips_symbol<size>* gsym)
+{
+ if (!gsym->has_lazy_stub() && !gsym->has_plt_offset())
+ {
+ this->symbols_.insert(gsym);
+ gsym->set_has_lazy_stub(true);
+ }
+}
+
+// Remove entry for a symbol.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_mips_stubs<size, big_endian>::remove_entry(
+ Mips_symbol<size>* gsym)
+{
+ if (gsym->has_lazy_stub())
+ {
+ this->symbols_.erase(gsym);
+ gsym->set_has_lazy_stub(false);
+ }
+}
+
+// Set stub offsets for symbols. This method expects that the number of
+// entries in dynamic symbol table is set.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_mips_stubs<size, big_endian>::set_lazy_stub_offsets()
+{
+ gold_assert(this->dynsym_count_ != -1U);
+
+ if (this->stub_offsets_are_set_)
+ return;
+
+ unsigned int stub_size = this->stub_size();
+ unsigned int offset = 0;
+ for (typename Unordered_set<Mips_symbol<size>*>::const_iterator
+ p = this->symbols_.begin();
+ p != this->symbols_.end();
+ ++p, offset += stub_size)
+ {
+ Mips_symbol<size>* mips_sym = *p;
+ mips_sym->set_lazy_stub_offset(offset);
+ }
+ this->stub_offsets_are_set_ = true;
+}
+
+template<int size, bool big_endian>
+void
+Mips_output_data_mips_stubs<size, big_endian>::set_needs_dynsym_value()
+{
+ for (typename Unordered_set<Mips_symbol<size>*>::const_iterator
+ p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
+ {
+ Mips_symbol<size>* sym = *p;
+ if (sym->is_from_dynobj())
+ sym->set_needs_dynsym_value();
+ }
+}
+
+// Write out the .MIPS.stubs. This uses the hand-coded instructions and
+// adjusts them as needed.
+
+template<int size, bool big_endian>
+void
+Mips_output_data_mips_stubs<size, big_endian>::do_write(Output_file* of)
+{
+ const off_t offset = this->offset();
+ const section_size_type oview_size =
+ convert_to_section_size_type(this->data_size());
+ unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+ bool big_stub = this->dynsym_count_ > 0x10000;
+
+ unsigned char* pov = oview;
+ for (typename Unordered_set<Mips_symbol<size>*>::const_iterator
+ p = this->symbols_.begin(); p != this->symbols_.end(); ++p)
+ {
+ Mips_symbol<size>* sym = *p;
+ const uint32_t* lazy_stub;
+ bool n64 = this->target_->is_output_n64();
+
+ if (!this->target_->is_output_micromips())
+ {
+ // Write standard (non-microMIPS) stub.
+ if (!big_stub)
+ {
+ if (sym->dynsym_index() & ~0x7fff)
+ // Dynsym index is between 32K and 64K.
+ lazy_stub = n64 ? lazy_stub_normal_2_n64 : lazy_stub_normal_2;
+ else
+ // Dynsym index is less than 32K.
+ lazy_stub = n64 ? lazy_stub_normal_1_n64 : lazy_stub_normal_1;
+ }
+ else
+ lazy_stub = n64 ? lazy_stub_big_n64 : lazy_stub_big;
+
+ unsigned int i = 0;
+ elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<32, big_endian>::writeval(pov + 4, lazy_stub[i + 1]);
+ pov += 8;
+
+ i += 2;
+ if (big_stub)
+ {
+ // LUI instruction of the big stub. Paste high 16 bits of the
+ // dynsym index.
+ elfcpp::Swap<32, big_endian>::writeval(pov,
+ lazy_stub[i] | ((sym->dynsym_index() >> 16) & 0x7fff));
+ pov += 4;
+ i += 1;
+ }
+ elfcpp::Swap<32, big_endian>::writeval(pov, lazy_stub[i]);
+ // Last stub instruction. Paste low 16 bits of the dynsym index.
+ elfcpp::Swap<32, big_endian>::writeval(pov + 4,
+ lazy_stub[i + 1] | (sym->dynsym_index() & 0xffff));
+ pov += 8;
+ }
+ else if (this->target_->use_32bit_micromips_instructions())
+ {
+ // Write microMIPS stub in insn32 mode.
+ if (!big_stub)
+ {
+ if (sym->dynsym_index() & ~0x7fff)
+ // Dynsym index is between 32K and 64K.
+ lazy_stub = n64 ? lazy_stub_micromips32_normal_2_n64
+ : lazy_stub_micromips32_normal_2;
+ else
+ // Dynsym index is less than 32K.
+ lazy_stub = n64 ? lazy_stub_micromips32_normal_1_n64
+ : lazy_stub_micromips32_normal_1;
+ }
+ else
+ lazy_stub = n64 ? lazy_stub_micromips32_big_n64
+ : lazy_stub_micromips32_big;
+
+ unsigned int i = 0;
+ // First stub instruction. We emit 32-bit microMIPS instructions by
+ // emitting two 16-bit parts because on microMIPS the 16-bit part of
+ // the instruction where the opcode is must always come first, for
+ // both little and big endian.
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
+ // Second stub instruction.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 6, lazy_stub[i + 3]);
+ pov += 8;
+ i += 4;
+ if (big_stub)
+ {
+ // LUI instruction of the big stub. Paste high 16 bits of the
+ // dynsym index.
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2,
+ (sym->dynsym_index() >> 16) & 0x7fff);
+ pov += 4;
+ i += 2;
+ }
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
+ // Last stub instruction. Paste low 16 bits of the dynsym index.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 6,
+ sym->dynsym_index() & 0xffff);
+ pov += 8;
+ }
+ else
+ {
+ // Write microMIPS stub.
+ if (!big_stub)
+ {
+ if (sym->dynsym_index() & ~0x7fff)
+ // Dynsym index is between 32K and 64K.
+ lazy_stub = n64 ? lazy_stub_micromips_normal_2_n64
+ : lazy_stub_micromips_normal_2;
+ else
+ // Dynsym index is less than 32K.
+ lazy_stub = n64 ? lazy_stub_micromips_normal_1_n64
+ : lazy_stub_micromips_normal_1;
+ }
+ else
+ lazy_stub = n64 ? lazy_stub_micromips_big_n64
+ : lazy_stub_micromips_big;
+
+ unsigned int i = 0;
+ // First stub instruction. We emit 32-bit microMIPS instructions by
+ // emitting two 16-bit parts because on microMIPS the 16-bit part of
+ // the instruction where the opcode is must always come first, for
+ // both little and big endian.
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
+ // Second stub instruction.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4, lazy_stub[i + 2]);
+ pov += 6;
+ i += 3;
+ if (big_stub)
+ {
+ // LUI instruction of the big stub. Paste high 16 bits of the
+ // dynsym index.
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2,
+ (sym->dynsym_index() >> 16) & 0x7fff);
+ pov += 4;
+ i += 2;
+ }
+ elfcpp::Swap<16, big_endian>::writeval(pov, lazy_stub[i]);
+ // Last stub instruction. Paste low 16 bits of the dynsym index.
+ elfcpp::Swap<16, big_endian>::writeval(pov + 2, lazy_stub[i + 1]);
+ elfcpp::Swap<16, big_endian>::writeval(pov + 4,
+ sym->dynsym_index() & 0xffff);
+ pov += 6;
+ }
+ }
+
+ // We always allocate 20 bytes for every stub, because final dynsym count is
+ // not known in method do_finalize_sections. There are 4 unused bytes per
+ // stub if final dynsym count is less than 0x10000.
+ unsigned int used = pov - oview;
+ unsigned int unused = big_stub ? 0 : this->symbols_.size() * 4;
+ gold_assert(static_cast<section_size_type>(used + unused) == oview_size);
+
+ // Fill the unused space with zeroes.
+ // TODO(sasa): Can we strip unused bytes during the relaxation?
+ if (unused > 0)
+ memset(pov, 0, unused);
+
+ of->write_output_view(offset, oview_size, oview);
+}
+
+// Mips_output_section_reginfo methods.
+
+template<int size, bool big_endian>
+void
+Mips_output_section_reginfo<size, big_endian>::do_write(Output_file* of)
+{
+ off_t offset = this->offset();
+ off_t data_size = this->data_size();
+
+ unsigned char* view = of->get_output_view(offset, data_size);
+ elfcpp::Swap<size, big_endian>::writeval(view, this->gprmask_);
+ elfcpp::Swap<size, big_endian>::writeval(view + 4, this->cprmask1_);
+ elfcpp::Swap<size, big_endian>::writeval(view + 8, this->cprmask2_);
+ elfcpp::Swap<size, big_endian>::writeval(view + 12, this->cprmask3_);
+ elfcpp::Swap<size, big_endian>::writeval(view + 16, this->cprmask4_);
+ // Write the gp value.
+ elfcpp::Swap<size, big_endian>::writeval(view + 20,
+ this->target_->gp_value());
+
+ of->write_output_view(offset, data_size, view);
+}
+
+// Mips_copy_relocs methods.
+
+// Emit any saved relocs.
+
+template<int sh_type, int size, bool big_endian>
+void
+Mips_copy_relocs<sh_type, size, big_endian>::emit_mips(
+ Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
+ Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target)
+{
+ for (typename Copy_relocs<sh_type, size, big_endian>::
+ Copy_reloc_entries::iterator p = this->entries_.begin();
+ p != this->entries_.end();
+ ++p)
+ emit_entry(*p, reloc_section, symtab, layout, target);
+
+ // We no longer need the saved information.
+ this->entries_.clear();
+}
+
+// Emit the reloc if appropriate.
+
+template<int sh_type, int size, bool big_endian>
+void
+Mips_copy_relocs<sh_type, size, big_endian>::emit_entry(
+ Copy_reloc_entry& entry,
+ Output_data_reloc<sh_type, true, size, big_endian>* reloc_section,
+ Symbol_table* symtab, Layout* layout, Target_mips<size, big_endian>* target)
+{
+ // If the symbol is no longer defined in a dynamic object, then we
+ // emitted a COPY relocation, and we do not want to emit this
+ // dynamic relocation.
+ if (!entry.sym_->is_from_dynobj())
+ return;
+
+ bool can_make_dynamic = (entry.reloc_type_ == elfcpp::R_MIPS_32
+ || entry.reloc_type_ == elfcpp::R_MIPS_REL32
+ || entry.reloc_type_ == elfcpp::R_MIPS_64);
+
+ Mips_symbol<size>* sym = Mips_symbol<size>::as_mips_sym(entry.sym_);
+ if (can_make_dynamic && !sym->has_static_relocs())
+ {
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(entry.relobj_);
+ target->got_section(symtab, layout)->record_global_got_symbol(
+ sym, object, entry.reloc_type_, true, false);
+ if (!symbol_references_local(sym, sym->should_add_dynsym_entry(symtab)))
+ target->rel_dyn_section(layout)->add_global(sym, elfcpp::R_MIPS_REL32,
+ entry.output_section_, entry.relobj_, entry.shndx_, entry.address_);
+ else
+ target->rel_dyn_section(layout)->add_symbolless_global_addend(
+ sym, elfcpp::R_MIPS_REL32, entry.output_section_, entry.relobj_,
+ entry.shndx_, entry.address_);
+ }
+ else
+ this->make_copy_reloc(symtab, layout,
+ static_cast<Sized_symbol<size>*>(entry.sym_),
+ reloc_section);
+}
+
+// Target_mips methods.
+
+// Return the value to use for a dynamic symbol which requires special
+// treatment. This is how we support equality comparisons of function
+// pointers across shared library boundaries, as described in the
+// processor specific ABI supplement.
+
+template<int size, bool big_endian>
+uint64_t
+Target_mips<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
+{
+ uint64_t value = 0;
+ const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
+
+ if (!mips_sym->has_lazy_stub())
+ {
+ if (mips_sym->has_plt_offset())
+ {
+ // We distinguish between PLT entries and lazy-binding stubs by
+ // giving the former an st_other value of STO_MIPS_PLT. Set the
+ // value to the stub address if there are any relocations in the
+ // binary where pointer equality matters.
+ if (mips_sym->pointer_equality_needed())
+ {
+ // Prefer a standard MIPS PLT entry.
+ if (mips_sym->has_mips_plt_offset())
+ value = this->plt_section()->mips_entry_address(mips_sym);
+ else
+ value = this->plt_section()->comp_entry_address(mips_sym) + 1;
+ }
+ else
+ value = 0;
+ }
+ }
+ else
+ {
+ // First, set stub offsets for symbols. This method expects that the
+ // number of entries in dynamic symbol table is set.
+ this->mips_stubs_section()->set_lazy_stub_offsets();
+
+ // The run-time linker uses the st_value field of the symbol
+ // to reset the global offset table entry for this external
+ // to its stub address when unlinking a shared object.
+ value = this->mips_stubs_section()->stub_address(mips_sym);
+ }
+
+ if (mips_sym->has_mips16_fn_stub())
+ {
+ // If we have a MIPS16 function with a stub, the dynamic symbol must
+ // refer to the stub, since only the stub uses the standard calling
+ // conventions.
+ value = mips_sym->template
+ get_mips16_fn_stub<big_endian>()->output_address();
+ }
+
+ return value;
+}
+
+// Get the dynamic reloc section, creating it if necessary. It's always
+// .rel.dyn, even for MIPS64.
+
+template<int size, bool big_endian>
+typename Target_mips<size, big_endian>::Reloc_section*
+Target_mips<size, big_endian>::rel_dyn_section(Layout* layout)
+{
+ if (this->rel_dyn_ == NULL)
+ {
+ gold_assert(layout != NULL);
+ this->rel_dyn_ = new Reloc_section(parameters->options().combreloc());
+ layout->add_output_section_data(".rel.dyn", elfcpp::SHT_REL,
+ elfcpp::SHF_ALLOC, this->rel_dyn_,
+ ORDER_DYNAMIC_RELOCS, false);
+
+ // First entry in .rel.dyn has to be null.
+ // This is hack - we define dummy output data and set its address to 0,
+ // and define absolute R_MIPS_NONE relocation with offset 0 against it.
+ // This ensures that the entry is null.
+ Output_data* od = new Output_data_zero_fill(0, 0);
+ od->set_address(0);
+ this->rel_dyn_->add_absolute(elfcpp::R_MIPS_NONE, od, 0);
+ }
+ return this->rel_dyn_;
+}
+
+// Get the GOT section, creating it if necessary.
+
+template<int size, bool big_endian>
+Mips_output_data_got<size, big_endian>*
+Target_mips<size, big_endian>::got_section(Symbol_table* symtab,
+ Layout* layout)
+{
+ if (this->got_ == NULL)
+ {
+ gold_assert(symtab != NULL && layout != NULL);
+
+ this->got_ = new Mips_output_data_got<size, big_endian>(this, symtab,
+ layout);
+ layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE |
+ elfcpp::SHF_MIPS_GPREL),
+ this->got_, ORDER_DATA, false);
+
+ // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
+ symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
+ Symbol_table::PREDEFINED,
+ this->got_,
+ 0, 0, elfcpp::STT_OBJECT,
+ elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0,
+ false, false);
+ }
+
+ return this->got_;
+}
+
+// Calculate value of _gp symbol.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::set_gp(Layout* layout, Symbol_table* symtab)
+{
+ if (this->gp_ != NULL)
+ return;
+
+ Output_data* section = layout->find_output_section(".got");
+ if (section == NULL)
+ {
+ // If there is no .got section, gp should be based on .sdata.
+ // TODO(sasa): This is probably not needed. This was needed for older
+ // MIPS architectures which accessed both GOT and .sdata section using
+ // gp-relative addressing. Modern Mips Linux ELF architectures don't
+ // access .sdata using gp-relative addressing.
+ for (Layout::Section_list::const_iterator
+ p = layout->section_list().begin();
+ p != layout->section_list().end();
+ ++p)
+ {
+ if (strcmp((*p)->name(), ".sdata") == 0)
+ {
+ section = *p;
+ break;
+ }
+ }
+ }
+
+ Sized_symbol<size>* gp =
+ static_cast<Sized_symbol<size>*>(symtab->lookup("_gp"));
+ if (gp != NULL)
+ {
+ if (gp->source() != Symbol::IS_CONSTANT && section != NULL)
+ gp->init_output_data(gp->name(), NULL, section, MIPS_GP_OFFSET, 0,
+ elfcpp::STT_OBJECT,
+ elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT, 0,
+ false, false);
+ this->gp_ = gp;
+ }
+ else if (section != NULL)
+ {
+ gp = static_cast<Sized_symbol<size>*>(symtab->define_in_output_data(
+ "_gp", NULL, Symbol_table::PREDEFINED,
+ section, MIPS_GP_OFFSET, 0,
+ elfcpp::STT_OBJECT,
+ elfcpp::STB_GLOBAL,
+ elfcpp::STV_DEFAULT,
+ 0, false, false));
+ this->gp_ = gp;
+ }
+}
+
+// Set the dynamic symbol indexes. INDEX is the index of the first
+// global dynamic symbol. Pointers to the symbols are stored into the
+// vector SYMS. The names are added to DYNPOOL. This returns an
+// updated dynamic symbol index.
+
+template<int size, bool big_endian>
+unsigned int
+Target_mips<size, big_endian>::do_set_dynsym_indexes(
+ std::vector<Symbol*>* dyn_symbols, unsigned int index,
+ std::vector<Symbol*>* syms, Stringpool* dynpool,
+ Versions* versions, Symbol_table* symtab) const
+{
+ std::vector<Symbol*> non_got_symbols;
+ std::vector<Symbol*> got_symbols;
+
+ reorder_dyn_symbols<size, big_endian>(dyn_symbols, &non_got_symbols,
+ &got_symbols);
+
+ for (std::vector<Symbol*>::iterator p = non_got_symbols.begin();
+ p != non_got_symbols.end();
+ ++p)
+ {
+ Symbol* sym = *p;
+
+ // Note that SYM may already have a dynamic symbol index, since
+ // some symbols appear more than once in the symbol table, with
+ // and without a version.
+
+ if (!sym->has_dynsym_index())
+ {
+ sym->set_dynsym_index(index);
+ ++index;
+ syms->push_back(sym);
+ dynpool->add(sym->name(), false, NULL);
+
+ // Record any version information.
+ if (sym->version() != NULL)
+ versions->record_version(symtab, dynpool, sym);
+
+ // If the symbol is defined in a dynamic object and is
+ // referenced in a regular object, then mark the dynamic
+ // object as needed. This is used to implement --as-needed.
+ if (sym->is_from_dynobj() && sym->in_reg())
+ sym->object()->set_is_needed();
+ }
+ }
+
+ for (std::vector<Symbol*>::iterator p = got_symbols.begin();
+ p != got_symbols.end();
+ ++p)
+ {
+ Symbol* sym = *p;
+ if (!sym->has_dynsym_index())
+ {
+ // Record any version information.
+ if (sym->version() != NULL)
+ versions->record_version(symtab, dynpool, sym);
+ }
+ }
+
+ index = versions->finalize(symtab, index, syms);
+
+ int got_sym_count = 0;
+ for (std::vector<Symbol*>::iterator p = got_symbols.begin();
+ p != got_symbols.end();
+ ++p)
+ {
+ Symbol* sym = *p;
+
+ if (!sym->has_dynsym_index())
+ {
+ ++got_sym_count;
+ sym->set_dynsym_index(index);
+ ++index;
+ syms->push_back(sym);
+ dynpool->add(sym->name(), false, NULL);
+
+ // If the symbol is defined in a dynamic object and is
+ // referenced in a regular object, then mark the dynamic
+ // object as needed. This is used to implement --as-needed.
+ if (sym->is_from_dynobj() && sym->in_reg())
+ sym->object()->set_is_needed();
+ }
+ }
+
+ // Set index of the first symbol that has .got entry.
+ this->got_->set_first_global_got_dynsym_index(
+ got_sym_count > 0 ? index - got_sym_count : -1U);
+
+ if (this->mips_stubs_ != NULL)
+ this->mips_stubs_->set_dynsym_count(index);
+
+ return index;
+}
+
+// Create a PLT entry for a global symbol referenced by r_type relocation.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::make_plt_entry(Symbol_table* symtab,
+ Layout* layout,
+ Mips_symbol<size>* gsym,
+ unsigned int r_type)
+{
+ if (gsym->has_lazy_stub() || gsym->has_plt_offset())
+ return;
+
+ if (this->plt_ == NULL)
+ {
+ // Create the GOT section first.
+ this->got_section(symtab, layout);
+
+ this->got_plt_ = new Output_data_space(4, "** GOT PLT");
+ layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
+ this->got_plt_, ORDER_DATA, false);
+
+ // The first two entries are reserved.
+ this->got_plt_->set_current_data_size(2 * size/8);
+
+ this->plt_ = new Mips_output_data_plt<size, big_endian>(layout,
+ this->got_plt_,
+ this);
+ layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_EXECINSTR),
+ this->plt_, ORDER_PLT, false);
+ }
+
+ this->plt_->add_entry(gsym, r_type);
+}
+
+
+// Get the .MIPS.stubs section, creating it if necessary.
+
+template<int size, bool big_endian>
+Mips_output_data_mips_stubs<size, big_endian>*
+Target_mips<size, big_endian>::mips_stubs_section(Layout* layout)
+{
+ if (this->mips_stubs_ == NULL)
+ {
+ this->mips_stubs_ =
+ new Mips_output_data_mips_stubs<size, big_endian>(this);
+ layout->add_output_section_data(".MIPS.stubs", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_EXECINSTR),
+ this->mips_stubs_, ORDER_PLT, false);
+ }
+ return this->mips_stubs_;
+}
+
+// Get the LA25 stub section, creating it if necessary.
+
+template<int size, bool big_endian>
+Mips_output_data_la25_stub<size, big_endian>*
+Target_mips<size, big_endian>::la25_stub_section(Layout* layout)
+{
+ if (this->la25_stub_ == NULL)
+ {
+ this->la25_stub_ = new Mips_output_data_la25_stub<size, big_endian>();
+ layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
+ (elfcpp::SHF_ALLOC
+ | elfcpp::SHF_EXECINSTR),
+ this->la25_stub_, ORDER_TEXT, false);
+ }
+ return this->la25_stub_;
+}
+
+// Process the relocations to determine unreferenced sections for
+// garbage collection.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::gc_process_relocs(
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols)
+{
+ typedef Target_mips<size, big_endian> Mips;
+ typedef typename Target_mips<size, big_endian>::Scan Scan;
+
+ gold::gc_process_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan,
+ typename Target_mips::Relocatable_size_for_reloc>(
+ symtab,
+ layout,
+ this,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols);
+}
+
+// Scan relocations for a section.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::scan_relocs(
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols)
+{
+ typedef Target_mips<size, big_endian> Mips;
+ typedef typename Target_mips<size, big_endian>::Scan Scan;
+
+ if (sh_type == elfcpp::SHT_REL)
+ gold::scan_relocs<size, big_endian, Mips, elfcpp::SHT_REL, Scan>(
+ symtab,
+ layout,
+ this,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols);
+ else if (sh_type == elfcpp::SHT_RELA)
+ gold::scan_relocs<size, big_endian, Mips, elfcpp::SHT_RELA, Scan>(
+ symtab,
+ layout,
+ this,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols);
+}
+
+template<int size, bool big_endian>
+bool
+Target_mips<size, big_endian>::mips_32bit_flags(elfcpp::Elf_Word flags)
+{
+ return ((flags & elfcpp::EF_MIPS_32BITMODE) != 0
+ || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_O32
+ || (flags & elfcpp::EF_MIPS_ABI) == elfcpp::E_MIPS_ABI_EABI32
+ || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_1
+ || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_2
+ || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32
+ || (flags & elfcpp::EF_MIPS_ARCH) == elfcpp::E_MIPS_ARCH_32R2);
+}
+
+// Return the MACH for a MIPS e_flags value.
+template<int size, bool big_endian>
+unsigned int
+Target_mips<size, big_endian>::elf_mips_mach(elfcpp::Elf_Word flags)
+{
+ switch (flags & elfcpp::EF_MIPS_MACH)
+ {
+ case elfcpp::E_MIPS_MACH_3900:
+ return mach_mips3900;
+
+ case elfcpp::E_MIPS_MACH_4010:
+ return mach_mips4010;
+
+ case elfcpp::E_MIPS_MACH_4100:
+ return mach_mips4100;
+
+ case elfcpp::E_MIPS_MACH_4111:
+ return mach_mips4111;
+
+ case elfcpp::E_MIPS_MACH_4120:
+ return mach_mips4120;
+
+ case elfcpp::E_MIPS_MACH_4650:
+ return mach_mips4650;
+
+ case elfcpp::E_MIPS_MACH_5400:
+ return mach_mips5400;
+
+ case elfcpp::E_MIPS_MACH_5500:
+ return mach_mips5500;
+
+ case elfcpp::E_MIPS_MACH_9000:
+ return mach_mips9000;
+
+ case elfcpp::E_MIPS_MACH_SB1:
+ return mach_mips_sb1;
+
+ case elfcpp::E_MIPS_MACH_LS2E:
+ return mach_mips_loongson_2e;
+
+ case elfcpp::E_MIPS_MACH_LS2F:
+ return mach_mips_loongson_2f;
+
+ case elfcpp::E_MIPS_MACH_LS3A:
+ return mach_mips_loongson_3a;
+
+ case elfcpp::E_MIPS_MACH_OCTEON2:
+ return mach_mips_octeon2;
+
+ case elfcpp::E_MIPS_MACH_OCTEON:
+ return mach_mips_octeon;
+
+ case elfcpp::E_MIPS_MACH_XLR:
+ return mach_mips_xlr;
+
+ default:
+ switch (flags & elfcpp::EF_MIPS_ARCH)
+ {
+ default:
+ case elfcpp::E_MIPS_ARCH_1:
+ return mach_mips3000;
+
+ case elfcpp::E_MIPS_ARCH_2:
+ return mach_mips6000;
+
+ case elfcpp::E_MIPS_ARCH_3:
+ return mach_mips4000;
+
+ case elfcpp::E_MIPS_ARCH_4:
+ return mach_mips8000;
+
+ case elfcpp::E_MIPS_ARCH_5:
+ return mach_mips5;
+
+ case elfcpp::E_MIPS_ARCH_32:
+ return mach_mipsisa32;
+
+ case elfcpp::E_MIPS_ARCH_64:
+ return mach_mipsisa64;
+
+ case elfcpp::E_MIPS_ARCH_32R2:
+ return mach_mipsisa32r2;
+
+ case elfcpp::E_MIPS_ARCH_64R2:
+ return mach_mipsisa64r2;
+ }
+ }
+
+ return 0;
+}
+
+// Check whether machine EXTENSION is an extension of machine BASE.
+template<int size, bool big_endian>
+bool
+Target_mips<size, big_endian>::mips_mach_extends(unsigned int base,
+ unsigned int extension)
+{
+ if (extension == base)
+ return true;
+
+ if ((base == mach_mipsisa32)
+ && this->mips_mach_extends(mach_mipsisa64, extension))
+ return true;
+
+ if ((base == mach_mipsisa32r2)
+ && this->mips_mach_extends(mach_mipsisa64r2, extension))
+ return true;
+
+ for (unsigned int i = 0; i < this->mips_mach_extensions_.size(); ++i)
+ if (extension == this->mips_mach_extensions_[i].first)
+ {
+ extension = this->mips_mach_extensions_[i].second;
+ if (extension == base)
+ return true;
+ }
+
+ return false;
+}
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::merge_processor_specific_flags(
+ const std::string& name, elfcpp::Elf_Word in_flags,
+ unsigned char in_ei_class, bool dyn_obj)
+{
+ // If flags are not set yet, just copy them.
+ if (!this->are_processor_specific_flags_set())
+ {
+ this->set_processor_specific_flags(in_flags);
+ this->ei_class_ = in_ei_class;
+ this->mach_ = this->elf_mips_mach(in_flags);
+ return;
+ }
+
+ elfcpp::Elf_Word new_flags = in_flags;
+ elfcpp::Elf_Word old_flags = this->processor_specific_flags();
+ elfcpp::Elf_Word merged_flags = this->processor_specific_flags();
+ merged_flags |= new_flags & elfcpp::EF_MIPS_NOREORDER;
+
+ // Check flag compatibility.
+ new_flags &= ~elfcpp::EF_MIPS_NOREORDER;
+ old_flags &= ~elfcpp::EF_MIPS_NOREORDER;
+
+ // Some IRIX 6 BSD-compatibility objects have this bit set. It
+ // doesn't seem to matter.
+ new_flags &= ~elfcpp::EF_MIPS_XGOT;
+ old_flags &= ~elfcpp::EF_MIPS_XGOT;
+
+ // MIPSpro generates ucode info in n64 objects. Again, we should
+ // just be able to ignore this.
+ new_flags &= ~elfcpp::EF_MIPS_UCODE;
+ old_flags &= ~elfcpp::EF_MIPS_UCODE;
+
+ // DSOs should only be linked with CPIC code.
+ if (dyn_obj)
+ new_flags |= elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC;
+
+ if (new_flags == old_flags)
+ {
+ this->set_processor_specific_flags(merged_flags);
+ return;
+ }
+
+ if (((new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0)
+ != ((old_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC)) != 0))
+ gold_warning(_("%s: linking abicalls files with non-abicalls files"),
+ name.c_str());
+
+ if (new_flags & (elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC))
+ merged_flags |= elfcpp::EF_MIPS_CPIC;
+ if (!(new_flags & elfcpp::EF_MIPS_PIC))
+ merged_flags &= ~elfcpp::EF_MIPS_PIC;
+
+ new_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC);
+ old_flags &= ~(elfcpp::EF_MIPS_PIC | elfcpp::EF_MIPS_CPIC);
+
+ // Compare the ISAs.
+ if (mips_32bit_flags(old_flags) != mips_32bit_flags(new_flags))
+ gold_error(_("%s: linking 32-bit code with 64-bit code"), name.c_str());
+ else if (!this->mips_mach_extends(this->elf_mips_mach(in_flags), this->mach_))
+ {
+ // Output ISA isn't the same as, or an extension of, input ISA.
+ if (this->mips_mach_extends(this->mach_, this->elf_mips_mach(in_flags)))
+ {
+ // Copy the architecture info from input object to output. Also copy
+ // the 32-bit flag (if set) so that we continue to recognise
+ // output as a 32-bit binary.
+ this->mach_ = this->elf_mips_mach(in_flags);
+ merged_flags &= ~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH);
+ merged_flags |= (new_flags & (elfcpp::EF_MIPS_ARCH
+ | elfcpp::EF_MIPS_MACH | elfcpp::EF_MIPS_32BITMODE));
+
+ // Copy across the ABI flags if output doesn't use them
+ // and if that was what caused us to treat input object as 32-bit.
+ if ((old_flags & elfcpp::EF_MIPS_ABI) == 0
+ && this->mips_32bit_flags(new_flags)
+ && !this->mips_32bit_flags(new_flags & ~elfcpp::EF_MIPS_ABI))
+ merged_flags |= new_flags & elfcpp::EF_MIPS_ABI;
+ }
+ else
+ // The ISAs aren't compatible.
+ gold_error(_("%s: linking %s module with previous %s modules"),
+ name.c_str(), this->elf_mips_mach_name(in_flags),
+ this->elf_mips_mach_name(merged_flags));
+ }
+
+ new_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH
+ | elfcpp::EF_MIPS_32BITMODE));
+ old_flags &= (~(elfcpp::EF_MIPS_ARCH | elfcpp::EF_MIPS_MACH
+ | elfcpp::EF_MIPS_32BITMODE));
+
+ // Compare ABIs. The 64-bit ABI does not use EF_MIPS_ABI. But, it does set
+ // EI_CLASS differently from any 32-bit ABI.
+ if ((new_flags & elfcpp::EF_MIPS_ABI) != (old_flags & elfcpp::EF_MIPS_ABI)
+ || (in_ei_class != this->ei_class_))
+ {
+ // Only error if both are set (to different values).
+ if (((new_flags & elfcpp::EF_MIPS_ABI)
+ && (old_flags & elfcpp::EF_MIPS_ABI))
+ || (in_ei_class != this->ei_class_))
+ gold_error(_("%s: ABI mismatch: linking %s module with "
+ "previous %s modules"), name.c_str(),
+ this->elf_mips_abi_name(in_flags, in_ei_class),
+ this->elf_mips_abi_name(merged_flags, this->ei_class_));
+
+ new_flags &= ~elfcpp::EF_MIPS_ABI;
+ old_flags &= ~elfcpp::EF_MIPS_ABI;
+ }
+
+ // Compare ASEs. Forbid linking MIPS16 and microMIPS ASE modules together
+ // and allow arbitrary mixing of the remaining ASEs (retain the union).
+ if ((new_flags & elfcpp::EF_MIPS_ARCH_ASE)
+ != (old_flags & elfcpp::EF_MIPS_ARCH_ASE))
+ {
+ int old_micro = old_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS;
+ int new_micro = new_flags & elfcpp::EF_MIPS_ARCH_ASE_MICROMIPS;
+ int old_m16 = old_flags & elfcpp::EF_MIPS_ARCH_ASE_M16;
+ int new_m16 = new_flags & elfcpp::EF_MIPS_ARCH_ASE_M16;
+ int micro_mis = old_m16 && new_micro;
+ int m16_mis = old_micro && new_m16;
+
+ if (m16_mis || micro_mis)
+ gold_error(_("%s: ASE mismatch: linking %s module with "
+ "previous %s modules"), name.c_str(),
+ m16_mis ? "MIPS16" : "microMIPS",
+ m16_mis ? "microMIPS" : "MIPS16");
+
+ merged_flags |= new_flags & elfcpp::EF_MIPS_ARCH_ASE;
+
+ new_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE;
+ old_flags &= ~ elfcpp::EF_MIPS_ARCH_ASE;
+ }
+
+ // Warn about any other mismatches.
+ if (new_flags != old_flags)
+ gold_error(_("%s: uses different e_flags (0x%x) fields than previous "
+ "modules (0x%x)"), name.c_str(), new_flags, old_flags);
+
+ this->set_processor_specific_flags(merged_flags);
+}
+
+// Adjust ELF file header.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::do_adjust_elf_header(
+ unsigned char* view,
+ int len)
+{
+ gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size);
+
+ elfcpp::Ehdr<size, big_endian> ehdr(view);
+ unsigned char e_ident[elfcpp::EI_NIDENT];
+ memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT);
+
+ e_ident[elfcpp::EI_CLASS] = this->ei_class_;
+
+ elfcpp::Ehdr_write<size, big_endian> oehdr(view);
+ oehdr.put_e_ident(e_ident);
+ if (this->entry_symbol_is_compressed_)
+ oehdr.put_e_entry(ehdr.get_e_entry() + 1);
+}
+
+// do_make_elf_object to override the same function in the base class.
+// We need to use a target-specific sub-class of
+// Sized_relobj_file<size, big_endian> to store Mips specific information.
+// Hence we need to have our own ELF object creation.
+
+template<int size, bool big_endian>
+Object*
+Target_mips<size, big_endian>::do_make_elf_object(
+ const std::string& name,
+ Input_file* input_file,
+ off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
+{
+ int et = ehdr.get_e_type();
+ // ET_EXEC files are valid input for --just-symbols/-R,
+ // and we treat them as relocatable objects.
+ if (et == elfcpp::ET_REL
+ || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
+ {
+ Mips_relobj<size, big_endian>* obj =
+ new Mips_relobj<size, big_endian>(name, input_file, offset, ehdr);
+ obj->setup();
+ return obj;
+ }
+ else if (et == elfcpp::ET_DYN)
+ {
+ // TODO(sasa): Should we create Mips_dynobj?
+ return Target::do_make_elf_object(name, input_file, offset, ehdr);
+ }
+ else
+ {
+ gold_error(_("%s: unsupported ELF file type %d"),
+ name.c_str(), et);
+ return NULL;
+ }
+}
+
+// Finalize the sections.
+
+template <int size, bool big_endian>
+void
+Target_mips<size, big_endian>::do_finalize_sections(Layout* layout,
+ const Input_objects* input_objects,
+ Symbol_table* symtab)
+{
+ // Add +1 to MIPS16 and microMIPS init_ and _fini symbols so that DT_INIT and
+ // DT_FINI have correct values.
+ Mips_symbol<size>* init = static_cast<Mips_symbol<size>*>(
+ symtab->lookup(parameters->options().init()));
+ if (init != NULL && (init->is_mips16() || init->is_micromips()))
+ init->set_value(init->value() | 1);
+ Mips_symbol<size>* fini = static_cast<Mips_symbol<size>*>(
+ symtab->lookup(parameters->options().fini()));
+ if (fini != NULL && (fini->is_mips16() || fini->is_micromips()))
+ fini->set_value(fini->value() | 1);
+
+ // Check whether the entry symbol is mips16 or micromips. This is needed to
+ // adjust entry address in ELF header.
+ Mips_symbol<size>* entry =
+ static_cast<Mips_symbol<size>*>(symtab->lookup(this->entry_symbol_name()));
+ this->entry_symbol_is_compressed_ = (entry != NULL && (entry->is_mips16()
+ || entry->is_micromips()));
+
+ if (!parameters->doing_static_link()
+ && (strcmp(parameters->options().hash_style(), "gnu") == 0
+ || strcmp(parameters->options().hash_style(), "both") == 0))
+ {
+ // .gnu.hash and the MIPS ABI require .dynsym to be sorted in different
+ // ways. .gnu.hash needs symbols to be grouped by hash code whereas the
+ // MIPS ABI requires a mapping between the GOT and the symbol table.
+ gold_error(".gnu.hash is incompatible with the MIPS ABI");
+ }
+
+ // Check whether the final section that was scanned has HI16 or GOT16
+ // relocations without the corresponding LO16 part.
+ if (this->got16_addends_.size() > 0)
+ gold_error("Can't find matching LO16 reloc");
+
+ // Set _gp value.
+ this->set_gp(layout, symtab);
+
+ // Check for any mips16 stub sections that we can discard.
+ if (!parameters->options().relocatable())
+ {
+ for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(*p);
+ object->discard_mips16_stub_sections(symtab);
+ }
+ }
+
+ // Merge processor-specific flags.
+ for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Mips_relobj<size, big_endian>* relobj =
+ Mips_relobj<size, big_endian>::as_mips_relobj(*p);
+
+ Input_file::Format format = relobj->input_file()->format();
+ if (format == Input_file::FORMAT_ELF)
+ {
+ // Read processor-specific flags in ELF file header.
+ const unsigned char* pehdr = relobj->get_view(
+ elfcpp::file_header_offset,
+ elfcpp::Elf_sizes<size>::ehdr_size,
+ true, false);
+
+ elfcpp::Ehdr<size, big_endian> ehdr(pehdr);
+ elfcpp::Elf_Word in_flags = ehdr.get_e_flags();
+ unsigned char ei_class = ehdr.get_e_ident()[elfcpp::EI_CLASS];
+
+ this->merge_processor_specific_flags(relobj->name(), in_flags,
+ ei_class, false);
+ }
+ }
+
+ for (Input_objects::Dynobj_iterator p = input_objects->dynobj_begin();
+ p != input_objects->dynobj_end();
+ ++p)
+ {
+ Sized_dynobj<size, big_endian>* dynobj =
+ static_cast<Sized_dynobj<size, big_endian>*>(*p);
+
+ // Read processor-specific flags.
+ const unsigned char* pehdr = dynobj->get_view(elfcpp::file_header_offset,
+ elfcpp::Elf_sizes<size>::ehdr_size,
+ true, false);
+
+ elfcpp::Ehdr<size, big_endian> ehdr(pehdr);
+ elfcpp::Elf_Word in_flags = ehdr.get_e_flags();
+ unsigned char ei_class = ehdr.get_e_ident()[elfcpp::EI_CLASS];
+
+ this->merge_processor_specific_flags(dynobj->name(), in_flags, ei_class,
+ true);
+ }
+
+ // Merge .reginfo contents of input objects.
+ Valtype gprmask = 0;
+ Valtype cprmask1 = 0;
+ Valtype cprmask2 = 0;
+ Valtype cprmask3 = 0;
+ Valtype cprmask4 = 0;
+ for (Input_objects::Relobj_iterator p = input_objects->relobj_begin();
+ p != input_objects->relobj_end();
+ ++p)
+ {
+ Mips_relobj<size, big_endian>* relobj =
+ Mips_relobj<size, big_endian>::as_mips_relobj(*p);
+
+ gprmask |= relobj->gprmask();
+ cprmask1 |= relobj->cprmask1();
+ cprmask2 |= relobj->cprmask2();
+ cprmask3 |= relobj->cprmask3();
+ cprmask4 |= relobj->cprmask4();
+ }
+
+ if (this->plt_ != NULL)
+ {
+ // Set final PLT offsets for symbols.
+ this->plt_section()->set_plt_offsets();
+
+ // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
+ // Set STO_MICROMIPS flag if the output has microMIPS code, but only if
+ // there are no standard PLT entries present.
+ unsigned char nonvis = 0;
+ if (this->is_output_micromips()
+ && !this->plt_section()->has_standard_entries())
+ nonvis = elfcpp::STO_MICROMIPS >> 2;
+ symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
+ Symbol_table::PREDEFINED,
+ this->plt_,
+ 0, 0, elfcpp::STT_FUNC,
+ elfcpp::STB_LOCAL,
+ elfcpp::STV_DEFAULT, nonvis,
+ false, false);
+ }
+
+ if (this->mips_stubs_ != NULL)
+ {
+ // Define _MIPS_STUBS_ at the start of the .MIPS.stubs section.
+ unsigned char nonvis = 0;
+ if (this->is_output_micromips())
+ nonvis = elfcpp::STO_MICROMIPS >> 2;
+ symtab->define_in_output_data("_MIPS_STUBS_", NULL,
+ Symbol_table::PREDEFINED,
+ this->mips_stubs_,
+ 0, 0, elfcpp::STT_FUNC,
+ elfcpp::STB_LOCAL,
+ elfcpp::STV_DEFAULT, nonvis,
+ false, false);
+ }
+
+ if (!parameters->options().relocatable() && !parameters->doing_static_link())
+ // In case there is no .got section, create one.
+ this->got_section(symtab, layout);
+
+ // Emit any relocs we saved in an attempt to avoid generating COPY
+ // relocs.
+ if (this->copy_relocs_.any_saved_relocs())
+ this->copy_relocs_.emit_mips(this->rel_dyn_section(layout), symtab, layout,
+ this);
+
+ // Emit dynamic relocs.
+ for (typename std::vector<Dyn_reloc>::iterator p = this->dyn_relocs_.begin();
+ p != this->dyn_relocs_.end();
+ ++p)
+ p->emit(this->rel_dyn_section(layout), this->got_section(), symtab);
+
+ if (this->has_got_section())
+ this->got_section()->lay_out_got(layout, symtab, input_objects);
+
+ if (this->mips_stubs_ != NULL)
+ this->mips_stubs_->set_needs_dynsym_value();
+
+ // Check for functions that might need $25 to be valid on entry.
+ // TODO(sasa): Can we do this without iterating over all symbols?
+ typedef Symbol_visitor_check_symbols<size, big_endian> Symbol_visitor;
+ symtab->for_all_symbols<size, Symbol_visitor>(Symbol_visitor(this, layout,
+ symtab));
+
+ // Add NULL segment.
+ if (!parameters->options().relocatable())
+ layout->make_output_segment(elfcpp::PT_NULL, 0);
+
+ for (Layout::Section_list::const_iterator p = layout->section_list().begin();
+ p != layout->section_list().end();
+ ++p)
+ {
+ if ((*p)->type() == elfcpp::SHT_MIPS_REGINFO)
+ {
+ Mips_output_section_reginfo<size, big_endian>* reginfo =
+ Mips_output_section_reginfo<size, big_endian>::
+ as_mips_output_section_reginfo(*p);
+
+ reginfo->set_masks(gprmask, cprmask1, cprmask2, cprmask3, cprmask4);
+
+ if (!parameters->options().relocatable())
+ {
+ Output_segment* reginfo_segment =
+ layout->make_output_segment(elfcpp::PT_MIPS_REGINFO,
+ elfcpp::PF_R);
+ reginfo_segment->add_output_section_to_nonload(reginfo,
+ elfcpp::PF_R);
+ }
+ }
+ }
+
+ // Fill in some more dynamic tags.
+ // TODO(sasa): Add more dynamic tags.
+ const Reloc_section* rel_plt = (this->plt_ == NULL
+ ? NULL : this->plt_->rel_plt());
+ layout->add_target_dynamic_tags(true, this->got_, rel_plt,
+ this->rel_dyn_, true, false);
+
+ Output_data_dynamic* const odyn = layout->dynamic_data();
+ if (odyn != NULL
+ && !parameters->options().relocatable()
+ && !parameters->doing_static_link())
+ {
+ unsigned int d_val;
+ // This element holds a 32-bit version id for the Runtime
+ // Linker Interface. This will start at integer value 1.
+ d_val = 0x01;
+ odyn->add_constant(elfcpp::DT_MIPS_RLD_VERSION, d_val);
+
+ // Dynamic flags
+ d_val = elfcpp::RHF_NOTPOT;
+ odyn->add_constant(elfcpp::DT_MIPS_FLAGS, d_val);
+
+ // Save layout for using when emiting custom dynamic tags.
+ this->layout_ = layout;
+
+ // This member holds the base address of the segment.
+ odyn->add_custom(elfcpp::DT_MIPS_BASE_ADDRESS);
+
+ // This member holds the number of entries in the .dynsym section.
+ odyn->add_custom(elfcpp::DT_MIPS_SYMTABNO);
+
+ // This member holds the index of the first dynamic symbol
+ // table entry that corresponds to an entry in the global offset table.
+ odyn->add_custom(elfcpp::DT_MIPS_GOTSYM);
+
+ // This member holds the number of local GOT entries.
+ odyn->add_constant(elfcpp::DT_MIPS_LOCAL_GOTNO,
+ this->got_->get_local_gotno());
+
+ if (this->plt_ != NULL)
+ // DT_MIPS_PLTGOT dynamic tag
+ odyn->add_section_address(elfcpp::DT_MIPS_PLTGOT, this->got_plt_);
+ }
+ }
+
+// Get the custom dynamic tag value.
+template<int size, bool big_endian>
+unsigned int
+Target_mips<size, big_endian>::do_dynamic_tag_custom_value(elfcpp::DT tag) const
+{
+ switch (tag)
+ {
+ case elfcpp::DT_MIPS_BASE_ADDRESS:
+ {
+ // The base address of the segment.
+ // At this point, the segment list has been sorted into final order,
+ // so just return vaddr of the first readable PT_LOAD segment.
+ Output_segment* seg =
+ this->layout_->find_output_segment(elfcpp::PT_LOAD, elfcpp::PF_R, 0);
+ gold_assert(seg != NULL);
+ return seg->vaddr();
+ }
+
+ case elfcpp::DT_MIPS_SYMTABNO:
+ // The number of entries in the .dynsym section.
+ return this->get_dt_mips_symtabno();
+
+ case elfcpp::DT_MIPS_GOTSYM:
+ {
+ // The index of the first dynamic symbol table entry that corresponds
+ // to an entry in the GOT.
+ if (this->got_->first_global_got_dynsym_index() != -1U)
+ return this->got_->first_global_got_dynsym_index();
+ else
+ // In case if we don't have global GOT symbols we default to setting
+ // DT_MIPS_GOTSYM to the same value as DT_MIPS_SYMTABNO.
+ return this->get_dt_mips_symtabno();
+ }
+
+ default:
+ gold_error(_("Unknown dynamic tag 0x%x"), (unsigned int)tag);
+ }
+
+ return (unsigned int)-1;
+}
+
+// Relocate section data.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::relocate_section(
+ const Relocate_info<size, big_endian>* relinfo,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ unsigned char* view,
+ Mips_address address,
+ section_size_type view_size,
+ const Reloc_symbol_changes* reloc_symbol_changes)
+{
+ typedef Target_mips<size, big_endian> Mips;
+ typedef typename Target_mips<size, big_endian>::Relocate Mips_relocate;
+
+ if (sh_type == elfcpp::SHT_REL)
+ gold::relocate_section<size, big_endian, Mips, elfcpp::SHT_REL,
+ Mips_relocate, gold::Default_comdat_behavior>(
+ relinfo,
+ this,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ view,
+ address,
+ view_size,
+ reloc_symbol_changes);
+ else if (sh_type == elfcpp::SHT_RELA)
+ gold::relocate_section<size, big_endian, Mips, elfcpp::SHT_RELA,
+ Mips_relocate, gold::Default_comdat_behavior>(
+ relinfo,
+ this,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ view,
+ address,
+ view_size,
+ reloc_symbol_changes);
+}
+
+// Return the size of a relocation while scanning during a relocatable
+// link.
+
+template<int size, bool big_endian>
+unsigned int
+Target_mips<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
+ unsigned int r_type,
+ Relobj* object)
+{
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_NONE:
+ case elfcpp::R_MIPS_TLS_DTPMOD64:
+ case elfcpp::R_MIPS_TLS_DTPREL64:
+ case elfcpp::R_MIPS_TLS_TPREL64:
+ return 0;
+
+ case elfcpp::R_MIPS_32:
+ case elfcpp::R_MIPS_TLS_DTPMOD32:
+ case elfcpp::R_MIPS_TLS_DTPREL32:
+ case elfcpp::R_MIPS_TLS_TPREL32:
+ case elfcpp::R_MIPS_REL32:
+ case elfcpp::R_MIPS_PC32:
+ case elfcpp::R_MIPS_GPREL32:
+ case elfcpp::R_MIPS_JALR:
+ return 4;
+
+ case elfcpp::R_MIPS_16:
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MIPS_LO16:
+ case elfcpp::R_MIPS_GPREL16:
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS16_LO16:
+ case elfcpp::R_MIPS_PC16:
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MIPS_TLS_DTPREL_HI16:
+ case elfcpp::R_MIPS_TLS_DTPREL_LO16:
+ case elfcpp::R_MIPS_TLS_TPREL_HI16:
+ case elfcpp::R_MIPS_TLS_TPREL_LO16:
+ case elfcpp::R_MIPS16_GPREL:
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MIPS_LITERAL:
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MIPS_GOT_OFST:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ return 2;
+
+ // These relocations are not byte sized
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MIPS16_26:
+ return 4;
+
+ case elfcpp::R_MIPS_COPY:
+ case elfcpp::R_MIPS_JUMP_SLOT:
+ object->error(_("unexpected reloc %u in object file"), r_type);
+ return 0;
+
+ default:
+ object->error(_("unsupported reloc %u in object file"), r_type);
+ return 0;
+ }
+}
+
+// Scan the relocs during a relocatable link.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::scan_relocatable_relocs(
+ Symbol_table* symtab,
+ Layout* layout,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ bool needs_special_offset_handling,
+ size_t local_symbol_count,
+ const unsigned char* plocal_symbols,
+ Relocatable_relocs* rr)
+{
+ gold_assert(sh_type == elfcpp::SHT_REL);
+
+ typedef Mips_scan_relocatable_relocs<big_endian, elfcpp::SHT_REL,
+ Relocatable_size_for_reloc> Scan_relocatable_relocs;
+
+ gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_REL,
+ Scan_relocatable_relocs>(
+ symtab,
+ layout,
+ object,
+ data_shndx,
+ prelocs,
+ reloc_count,
+ output_section,
+ needs_special_offset_handling,
+ local_symbol_count,
+ plocal_symbols,
+ rr);
+}
+
+// Emit relocations for a section.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::relocate_relocs(
+ const Relocate_info<size, big_endian>* relinfo,
+ unsigned int sh_type,
+ const unsigned char* prelocs,
+ size_t reloc_count,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off
+ offset_in_output_section,
+ const Relocatable_relocs* rr,
+ unsigned char* view,
+ Mips_address view_address,
+ section_size_type view_size,
+ unsigned char* reloc_view,
+ section_size_type reloc_view_size)
+{
+ gold_assert(sh_type == elfcpp::SHT_REL);
+
+ gold::relocate_relocs<size, big_endian, elfcpp::SHT_REL>(
+ relinfo,
+ prelocs,
+ reloc_count,
+ output_section,
+ offset_in_output_section,
+ rr,
+ view,
+ view_address,
+ view_size,
+ reloc_view,
+ reloc_view_size);
+}
+
+// Perform target-specific processing in a relocatable link. This is
+// only used if we use the relocation strategy RELOC_SPECIAL.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::relocate_special_relocatable(
+ const Relocate_info<size, big_endian>* relinfo,
+ unsigned int sh_type,
+ const unsigned char* preloc_in,
+ size_t relnum,
+ Output_section* output_section,
+ typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
+ unsigned char* view,
+ Mips_address view_address,
+ section_size_type,
+ unsigned char* preloc_out)
+{
+ // We can only handle REL type relocation sections.
+ gold_assert(sh_type == elfcpp::SHT_REL);
+
+ typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc
+ Reltype;
+ typedef typename Reloc_types<elfcpp::SHT_REL, size, big_endian>::Reloc_write
+ Reltype_write;
+
+ typedef Mips_relocate_functions<size, big_endian> Reloc_funcs;
+
+ const Mips_address invalid_address = static_cast<Mips_address>(0) - 1;
+
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object);
+ const unsigned int local_count = object->local_symbol_count();
+
+ Reltype reloc(preloc_in);
+ Reltype_write reloc_write(preloc_out);
+
+ elfcpp::Elf_types<32>::Elf_WXword r_info = reloc.get_r_info();
+ const unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ const unsigned int r_type = elfcpp::elf_r_type<size>(r_info);
+
+ // Get the new symbol index.
+ // We only use RELOC_SPECIAL strategy in local relocations.
+ gold_assert(r_sym < local_count);
+
+ // We are adjusting a section symbol. We need to find
+ // the symbol table index of the section symbol for
+ // the output section corresponding to input section
+ // in which this symbol is defined.
+ bool is_ordinary;
+ unsigned int shndx = object->local_symbol_input_shndx(r_sym, &is_ordinary);
+ gold_assert(is_ordinary);
+ Output_section* os = object->output_section(shndx);
+ gold_assert(os != NULL);
+ gold_assert(os->needs_symtab_index());
+ unsigned int new_symndx = os->symtab_index();
+
+ // Get the new offset--the location in the output section where
+ // this relocation should be applied.
+
+ Mips_address offset = reloc.get_r_offset();
+ Mips_address new_offset;
+ if (offset_in_output_section != invalid_address)
+ new_offset = offset + offset_in_output_section;
+ else
+ {
+ section_offset_type sot_offset =
+ convert_types<section_offset_type, Mips_address>(offset);
+ section_offset_type new_sot_offset =
+ output_section->output_offset(object, relinfo->data_shndx,
+ sot_offset);
+ gold_assert(new_sot_offset != -1);
+ new_offset = new_sot_offset;
+ }
+
+ // In an object file, r_offset is an offset within the section.
+ // In an executable or dynamic object, generated by
+ // --emit-relocs, r_offset is an absolute address.
+ if (!parameters->options().relocatable())
+ {
+ new_offset += view_address;
+ if (offset_in_output_section != invalid_address)
+ new_offset -= offset_in_output_section;
+ }
+
+ reloc_write.put_r_offset(new_offset);
+ reloc_write.put_r_info(elfcpp::elf_r_info<32>(new_symndx, r_type));
+
+ // Handle the reloc addend.
+ // The relocation uses a section symbol in the input file.
+ // We are adjusting it to use a section symbol in the output
+ // file. The input section symbol refers to some address in
+ // the input section. We need the relocation in the output
+ // file to refer to that same address. This adjustment to
+ // the addend is the same calculation we use for a simple
+ // absolute relocation for the input section symbol.
+
+ const Symbol_value<size>* psymval = object->local_symbol(r_sym);
+
+ unsigned char* paddend = view + offset;
+ typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY;
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_26:
+ reloc_status = Reloc_funcs::rel26(paddend, object, psymval,
+ offset_in_output_section, true, 0, sh_type == elfcpp::SHT_REL, NULL,
+ false /*TODO(sasa): cross mode jump*/, r_type, this->jal_to_bal());
+ break;
+
+ default:
+ gold_unreachable();
+ }
+
+ // Report any errors.
+ switch (reloc_status)
+ {
+ case Reloc_funcs::STATUS_OKAY:
+ break;
+ case Reloc_funcs::STATUS_OVERFLOW:
+ gold_error_at_location(relinfo, relnum, reloc.get_r_offset(),
+ _("relocation overflow"));
+ break;
+ case Reloc_funcs::STATUS_BAD_RELOC:
+ gold_error_at_location(relinfo, relnum, reloc.get_r_offset(),
+ _("unexpected opcode while processing relocation"));
+ break;
+ default:
+ gold_unreachable();
+ }
+}
+
+// Optimize the TLS relocation type based on what we know about the
+// symbol. IS_FINAL is true if the final address of this symbol is
+// known at link time.
+
+template<int size, bool big_endian>
+tls::Tls_optimization
+Target_mips<size, big_endian>::optimize_tls_reloc(bool, int)
+{
+ // FIXME: Currently we do not do any TLS optimization.
+ return tls::TLSOPT_NONE;
+}
+
+// Scan a relocation for a local symbol.
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::local(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>* rela,
+ const elfcpp::Rel<size, big_endian>* rel,
+ unsigned int rel_type,
+ unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded)
+{
+ if (is_discarded)
+ return;
+
+ Mips_address r_offset;
+ typename elfcpp::Elf_types<size>::Elf_WXword r_info;
+ typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
+
+ if (rel_type == elfcpp::SHT_RELA)
+ {
+ r_offset = rela->get_r_offset();
+ r_info = rela->get_r_info();
+ r_addend = rela->get_r_addend();
+ }
+ else
+ {
+ r_offset = rel->get_r_offset();
+ r_info = rel->get_r_info();
+ r_addend = 0;
+ }
+
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ Mips_relobj<size, big_endian>* mips_obj =
+ Mips_relobj<size, big_endian>::as_mips_relobj(object);
+
+ if (mips_obj->is_mips16_stub_section(data_shndx))
+ {
+ mips_obj->get_mips16_stub_section(data_shndx)
+ ->new_local_reloc_found(r_type, r_sym);
+ }
+
+ if (r_type == elfcpp::R_MIPS_NONE)
+ // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
+ // mips16 stub.
+ return;
+
+ if (!mips16_call_reloc(r_type)
+ && !mips_obj->section_allows_mips16_refs(data_shndx))
+ // This reloc would need to refer to a MIPS16 hard-float stub, if
+ // there is one. We ignore MIPS16 stub sections and .pdr section when
+ // looking for relocs that would need to refer to MIPS16 stubs.
+ mips_obj->add_local_non_16bit_call(r_sym);
+
+ if (r_type == elfcpp::R_MIPS16_26
+ && !mips_obj->section_allows_mips16_refs(data_shndx))
+ mips_obj->add_local_16bit_call(r_sym);
+
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MIPS_GOT_OFST:
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_OFST:
+ case elfcpp::R_MICROMIPS_GOT_DISP:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ // We need a GOT section.
+ target->got_section(symtab, layout);
+ break;
+
+ default:
+ break;
+ }
+
+ if (call_lo16_reloc(r_type)
+ || got_lo16_reloc(r_type)
+ || got_disp_reloc(r_type))
+ {
+ // We may need a local GOT entry for this relocation. We
+ // don't count R_MIPS_GOT_PAGE because we can estimate the
+ // maximum number of pages needed by looking at the size of
+ // the segment. Similar comments apply to R_MIPS*_GOT16 and
+ // R_MIPS*_CALL16. We don't count R_MIPS_GOT_HI16, or
+ // R_MIPS_CALL_HI16 because these are always followed by an
+ // R_MIPS_GOT_LO16 or R_MIPS_CALL_LO16.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type, -1U);
+ }
+
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ gold_error(_("CALL16 reloc at 0x%lx not against global symbol "),
+ (unsigned long)r_offset);
+ return;
+
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ {
+ // This relocation needs a page entry in the GOT.
+ // Get the section contents.
+ section_size_type view_size = 0;
+ const unsigned char* view = object->section_contents(data_shndx,
+ &view_size, false);
+ view += r_offset;
+
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff
+ : r_addend);
+
+ if (rel_type == elfcpp::SHT_REL && got16_reloc(r_type))
+ target->got16_addends_.push_back(got16_addend<size, big_endian>(
+ object, data_shndx, r_type, r_sym, addend));
+ else
+ target->got_section()->record_got_page_entry(mips_obj, r_sym, addend);
+ break;
+ }
+
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MICROMIPS_HI16:
+ // Record the reloc so that we can check whether the corresponding LO16
+ // part exists.
+ if (rel_type == elfcpp::SHT_REL)
+ target->got16_addends_.push_back(got16_addend<size, big_endian>(
+ object, data_shndx, r_type, r_sym, 0));
+ break;
+
+ case elfcpp::R_MIPS_LO16:
+ case elfcpp::R_MIPS16_LO16:
+ case elfcpp::R_MICROMIPS_LO16:
+ {
+ if (rel_type != elfcpp::SHT_REL)
+ break;
+
+ // Find corresponding GOT16/HI16 relocation.
+
+ // According to the MIPS ELF ABI, the R_MIPS_LO16 relocation must
+ // be immediately following. However, for the IRIX6 ABI, the next
+ // relocation may be a composed relocation consisting of several
+ // relocations for the same address. In that case, the R_MIPS_LO16
+ // relocation may occur as one of these. We permit a similar
+ // extension in general, as that is useful for GCC.
+
+ // In some cases GCC dead code elimination removes the LO16 but
+ // keeps the corresponding HI16. This is strictly speaking a
+ // violation of the ABI but not immediately harmful.
+
+ typename std::list<got16_addend<size, big_endian> >::iterator it =
+ target->got16_addends_.begin();
+ while (it != target->got16_addends_.end())
+ {
+ got16_addend<size, big_endian> _got16_addend = *it;
+
+ // TODO(sasa): Split got16_addends_ list into two lists - one for
+ // GOT16 relocs and the other for HI16 relocs.
+
+ // Report an error if we find HI16 or GOT16 reloc from the
+ // previous section without the matching LO16 part.
+ if (_got16_addend.object != object
+ || _got16_addend.shndx != data_shndx)
+ {
+ gold_error("Can't find matching LO16 reloc");
+ break;
+ }
+
+ if (_got16_addend.r_sym != r_sym
+ || !is_matching_lo16_reloc(_got16_addend.r_type, r_type))
+ {
+ ++it;
+ continue;
+ }
+
+ // We found a matching HI16 or GOT16 reloc for this LO16 reloc.
+ // For GOT16, we need to calculate combined addend and record GOT page
+ // entry.
+ if (got16_reloc(_got16_addend.r_type))
+ {
+
+ section_size_type view_size = 0;
+ const unsigned char* view = object->section_contents(data_shndx,
+ &view_size,
+ false);
+ view += r_offset;
+
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ int32_t addend = Bits<16>::sign_extend32(val & 0xffff);
+
+ addend = (_got16_addend.addend << 16) + addend;
+ target->got_section()->record_got_page_entry(mips_obj, r_sym,
+ addend);
+ }
+
+ it = target->got16_addends_.erase(it);
+ }
+ break;
+ }
+ }
+
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_32:
+ case elfcpp::R_MIPS_REL32:
+ case elfcpp::R_MIPS_64:
+ {
+ if (parameters->options().output_is_position_independent())
+ {
+ // If building a shared library (or a position-independent
+ // executable), we need to create a dynamic relocation for
+ // this location.
+ Reloc_section* rel_dyn = target->rel_dyn_section(layout);
+ unsigned int r_sym = elfcpp::elf_r_sym<32>(r_info);
+ rel_dyn->add_symbolless_local_addend(object, r_sym,
+ elfcpp::R_MIPS_REL32,
+ output_section, data_shndx,
+ r_offset);
+ }
+ break;
+ }
+
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ {
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ bool output_is_shared = parameters->options().shared();
+ const tls::Tls_optimization optimized_type
+ = Target_mips<size, big_endian>::optimize_tls_reloc(
+ !output_is_shared, r_type);
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a pair of GOT entries for the module index and
+ // dtv-relative offset.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ unsigned int shndx = lsym.get_st_shndx();
+ bool is_ordinary;
+ shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
+ if (!is_ordinary)
+ {
+ object->error(_("local symbol %u has bad shndx %u"),
+ r_sym, shndx);
+ break;
+ }
+ got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type,
+ shndx);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // We always record LDM symbols as local with index 0.
+ target->got_section()->record_local_got_symbol(mips_obj, 0,
+ r_addend, r_type,
+ -1U);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ layout->set_has_static_tls();
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a GOT entry for the tp-relative offset.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ got->record_local_got_symbol(mips_obj, r_sym, r_addend, r_type,
+ -1U);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+
+ default:
+ gold_unreachable();
+ }
+ }
+ break;
+
+ default:
+ break;
+ }
+
+ // Refuse some position-dependent relocations when creating a
+ // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
+ // not PIC, but we can create dynamic relocations and the result
+ // will be fine. Also do not refuse R_MIPS_LO16, which can be
+ // combined with R_MIPS_GOT16.
+ if (parameters->options().shared())
+ {
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MICROMIPS_HI16:
+ // Don't refuse a high part relocation if it's against
+ // no symbol (e.g. part of a compound relocation).
+ if (r_sym == 0)
+ break;
+
+ // FALLTHROUGH
+
+ case elfcpp::R_MIPS16_26:
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MICROMIPS_26_S1:
+ gold_error(_("%s: relocation %u against `%s' can not be used when "
+ "making a shared object; recompile with -fPIC"),
+ object->name().c_str(), r_type, "a local symbol");
+ default:
+ break;
+ }
+ }
+}
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::local(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rel<size, big_endian>& reloc,
+ unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded)
+{
+ if (is_discarded)
+ return;
+
+ local(
+ symtab,
+ layout,
+ target,
+ object,
+ data_shndx,
+ output_section,
+ (const elfcpp::Rela<size, big_endian>*) NULL,
+ &reloc,
+ elfcpp::SHT_REL,
+ r_type,
+ lsym, is_discarded);
+}
+
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::local(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc,
+ unsigned int r_type,
+ const elfcpp::Sym<size, big_endian>& lsym,
+ bool is_discarded)
+{
+ if (is_discarded)
+ return;
+
+ local(
+ symtab,
+ layout,
+ target,
+ object,
+ data_shndx,
+ output_section,
+ &reloc,
+ (const elfcpp::Rel<size, big_endian>*) NULL,
+ elfcpp::SHT_RELA,
+ r_type,
+ lsym, is_discarded);
+}
+
+// Scan a relocation for a global symbol.
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::global(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>* rela,
+ const elfcpp::Rel<size, big_endian>* rel,
+ unsigned int rel_type,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ Mips_address r_offset;
+ typename elfcpp::Elf_types<size>::Elf_WXword r_info;
+ typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
+
+ if (rel_type == elfcpp::SHT_RELA)
+ {
+ r_offset = rela->get_r_offset();
+ r_info = rela->get_r_info();
+ r_addend = rela->get_r_addend();
+ }
+ else
+ {
+ r_offset = rel->get_r_offset();
+ r_info = rel->get_r_info();
+ r_addend = 0;
+ }
+
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ Mips_relobj<size, big_endian>* mips_obj =
+ Mips_relobj<size, big_endian>::as_mips_relobj(object);
+ Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
+
+ if (mips_obj->is_mips16_stub_section(data_shndx))
+ {
+ mips_obj->get_mips16_stub_section(data_shndx)
+ ->new_global_reloc_found(r_type, mips_sym);
+ }
+
+ if (r_type == elfcpp::R_MIPS_NONE)
+ // R_MIPS_NONE is used in mips16 stub sections, to define the target of the
+ // mips16 stub.
+ return;
+
+ if (!mips16_call_reloc(r_type)
+ && !mips_obj->section_allows_mips16_refs(data_shndx))
+ // This reloc would need to refer to a MIPS16 hard-float stub, if
+ // there is one. We ignore MIPS16 stub sections and .pdr section when
+ // looking for relocs that would need to refer to MIPS16 stubs.
+ mips_sym->set_need_fn_stub();
+
+ // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
+ // section. We check here to avoid creating a dynamic reloc against
+ // _GLOBAL_OFFSET_TABLE_.
+ if (!target->has_got_section()
+ && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
+ target->got_section(symtab, layout);
+
+ // We need PLT entries if there are static-only relocations against
+ // an externally-defined function. This can technically occur for
+ // shared libraries if there are branches to the symbol, although it
+ // is unlikely that this will be used in practice due to the short
+ // ranges involved. It can occur for any relative or absolute relocation
+ // in executables; in that case, the PLT entry becomes the function's
+ // canonical address.
+ bool static_reloc = false;
+
+ // Set CAN_MAKE_DYNAMIC to true if we can convert this
+ // relocation into a dynamic one.
+ bool can_make_dynamic = false;
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MIPS_GOT_OFST:
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_OFST:
+ case elfcpp::R_MICROMIPS_GOT_DISP:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ // We need a GOT section.
+ target->got_section(symtab, layout);
+ break;
+
+ // This is just a hint; it can safely be ignored. Don't set
+ // has_static_relocs for the corresponding symbol.
+ case elfcpp::R_MIPS_JALR:
+ case elfcpp::R_MICROMIPS_JALR:
+ break;
+
+ case elfcpp::R_MIPS_GPREL16:
+ case elfcpp::R_MIPS_GPREL32:
+ case elfcpp::R_MIPS16_GPREL:
+ case elfcpp::R_MICROMIPS_GPREL16:
+ // TODO(sasa)
+ // GP-relative relocations always resolve to a definition in a
+ // regular input file, ignoring the one-definition rule. This is
+ // important for the GP setup sequence in NewABI code, which
+ // always resolves to a local function even if other relocations
+ // against the symbol wouldn't.
+ //constrain_symbol_p = FALSE;
+ break;
+
+ case elfcpp::R_MIPS_32:
+ case elfcpp::R_MIPS_REL32:
+ case elfcpp::R_MIPS_64:
+ if (parameters->options().shared()
+ || strcmp(gsym->name(), "__gnu_local_gp") != 0)
+ {
+ if (r_type != elfcpp::R_MIPS_REL32)
+ {
+ static_reloc = true;
+ mips_sym->set_pointer_equality_needed();
+ }
+ can_make_dynamic = true;
+ break;
+ }
+ // Fall through.
+
+ default:
+ // Most static relocations require pointer equality, except
+ // for branches.
+ mips_sym->set_pointer_equality_needed();
+
+ // Fall through.
+
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MIPS_PC16:
+ case elfcpp::R_MIPS16_26:
+ case elfcpp::R_MICROMIPS_26_S1:
+ case elfcpp::R_MICROMIPS_PC7_S1:
+ case elfcpp::R_MICROMIPS_PC10_S1:
+ case elfcpp::R_MICROMIPS_PC16_S1:
+ case elfcpp::R_MICROMIPS_PC23_S2:
+ static_reloc = true;
+ mips_sym->set_has_static_relocs();
+ break;
+ }
+
+ // If there are call relocations against an externally-defined symbol,
+ // see whether we can create a MIPS lazy-binding stub for it. We can
+ // only do this if all references to the function are through call
+ // relocations, and in that case, the traditional lazy-binding stubs
+ // are much more efficient than PLT entries.
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MIPS_JALR:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_JALR:
+ if (!mips_sym->no_lazy_stub())
+ {
+ if ((mips_sym->needs_plt_entry() && mips_sym->is_from_dynobj())
+ // Calls from shared objects to undefined symbols of type
+ // STT_NOTYPE need lazy-binding stub.
+ || (mips_sym->is_undefined() && parameters->options().shared()))
+ target->mips_stubs_section(layout)->make_entry(mips_sym);
+ }
+ break;
+ default:
+ {
+ // We must not create a stub for a symbol that has relocations
+ // related to taking the function's address.
+ mips_sym->set_no_lazy_stub();
+ target->remove_lazy_stub_entry(mips_sym);
+ break;
+ }
+ }
+
+ if (relocation_needs_la25_stub<size, big_endian>(mips_obj, r_type,
+ mips_sym->is_mips16()))
+ mips_sym->set_has_nonpic_branches();
+
+ // R_MIPS_HI16 against _gp_disp is used for $gp setup,
+ // and has a special meaning.
+ bool gp_disp_against_hi16 = (!mips_obj->is_newabi()
+ && strcmp(gsym->name(), "_gp_disp") == 0
+ && (hi16_reloc(r_type) || lo16_reloc(r_type)));
+ if (static_reloc && gsym->needs_plt_entry())
+ {
+ target->make_plt_entry(symtab, layout, mips_sym, r_type);
+
+ // Since this is not a PC-relative relocation, we may be
+ // taking the address of a function. In that case we need to
+ // set the entry in the dynamic symbol table to the address of
+ // the PLT entry.
+ if (gsym->is_from_dynobj() && !parameters->options().shared())
+ {
+ gsym->set_needs_dynsym_value();
+ // We distinguish between PLT entries and lazy-binding stubs by
+ // giving the former an st_other value of STO_MIPS_PLT. Set the
+ // flag if there are any relocations in the binary where pointer
+ // equality matters.
+ if (mips_sym->pointer_equality_needed())
+ mips_sym->set_mips_plt();
+ }
+ }
+ if ((static_reloc || can_make_dynamic) && !gp_disp_against_hi16)
+ {
+ // Absolute addressing relocations.
+ // Make a dynamic relocation if necessary.
+ if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
+ {
+ if (gsym->may_need_copy_reloc())
+ {
+ target->copy_reloc(symtab, layout, object,
+ data_shndx, output_section, gsym, *rel);
+ }
+ else if (can_make_dynamic)
+ {
+ // Create .rel.dyn section.
+ target->rel_dyn_section(layout);
+ target->dynamic_reloc(mips_sym, elfcpp::R_MIPS_REL32, mips_obj,
+ data_shndx, output_section, r_offset);
+ }
+ else
+ gold_error(_("non-dynamic relocations refer to dynamic symbol %s"),
+ gsym->name());
+ }
+ }
+
+ bool for_call = false;
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ for_call = true;
+ // Fall through.
+
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MICROMIPS_GOT_DISP:
+ {
+ // The symbol requires a GOT entry.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
+ for_call);
+ mips_sym->set_global_got_area(GGA_NORMAL);
+ }
+ break;
+
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ {
+ // This relocation needs a page entry in the GOT.
+ // Get the section contents.
+ section_size_type view_size = 0;
+ const unsigned char* view =
+ object->section_contents(data_shndx, &view_size, false);
+ view += r_offset;
+
+ Valtype32 val = elfcpp::Swap<32, big_endian>::readval(view);
+ Valtype32 addend = (rel_type == elfcpp::SHT_REL ? val & 0xffff
+ : r_addend);
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ got->record_got_page_entry(mips_obj, r_sym, addend);
+
+ // If this is a global, overridable symbol, GOT_PAGE will
+ // decay to GOT_DISP, so we'll need a GOT entry for it.
+ bool def_regular = (mips_sym->source() == Symbol::FROM_OBJECT
+ && !mips_sym->object()->is_dynamic()
+ && !mips_sym->is_undefined());
+ if (!def_regular
+ || (parameters->options().output_is_position_independent()
+ && !parameters->options().Bsymbolic()
+ && !mips_sym->is_forced_local()))
+ {
+ got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
+ for_call);
+ mips_sym->set_global_got_area(GGA_NORMAL);
+ }
+ }
+ break;
+
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ {
+ const bool is_final = gsym->final_value_is_known();
+ const tls::Tls_optimization optimized_type =
+ Target_mips<size, big_endian>::optimize_tls_reloc(is_final, r_type);
+
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a pair of GOT entries for the module index and
+ // dtv-relative offset.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
+ false);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // We always record LDM symbols as local with index 0.
+ target->got_section()->record_local_got_symbol(mips_obj, 0,
+ r_addend, r_type,
+ -1U);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ layout->set_has_static_tls();
+ if (optimized_type == tls::TLSOPT_NONE)
+ {
+ // Create a GOT entry for the tp-relative offset.
+ Mips_output_data_got<size, big_endian>* got =
+ target->got_section(symtab, layout);
+ got->record_global_got_symbol(mips_sym, mips_obj, r_type, false,
+ false);
+ }
+ else
+ {
+ // FIXME: TLS optimization not supported yet.
+ gold_unreachable();
+ }
+ break;
+
+ default:
+ gold_unreachable();
+ }
+ }
+ break;
+ case elfcpp::R_MIPS_COPY:
+ case elfcpp::R_MIPS_JUMP_SLOT:
+ // These are relocations which should only be seen by the
+ // dynamic linker, and should never be seen here.
+ gold_error(_("%s: unexpected reloc %u in object file"),
+ object->name().c_str(), r_type);
+ break;
+
+ default:
+ break;
+ }
+
+ // Refuse some position-dependent relocations when creating a
+ // shared library. Do not refuse R_MIPS_32 / R_MIPS_64; they're
+ // not PIC, but we can create dynamic relocations and the result
+ // will be fine. Also do not refuse R_MIPS_LO16, which can be
+ // combined with R_MIPS_GOT16.
+ if (parameters->options().shared())
+ {
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MICROMIPS_HI16:
+ // Don't refuse a high part relocation if it's against
+ // no symbol (e.g. part of a compound relocation).
+ if (r_sym == 0)
+ break;
+
+ // R_MIPS_HI16 against _gp_disp is used for $gp setup,
+ // and has a special meaning.
+ if (!mips_obj->is_newabi() && strcmp(gsym->name(), "_gp_disp") == 0)
+ break;
+
+ // FALLTHROUGH
+
+ case elfcpp::R_MIPS16_26:
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MICROMIPS_26_S1:
+ gold_error(_("%s: relocation %u against `%s' can not be used when "
+ "making a shared object; recompile with -fPIC"),
+ object->name().c_str(), r_type, gsym->name());
+ default:
+ break;
+ }
+ }
+}
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::global(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rela<size, big_endian>& reloc,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ global(
+ symtab,
+ layout,
+ target,
+ object,
+ data_shndx,
+ output_section,
+ &reloc,
+ (const elfcpp::Rel<size, big_endian>*) NULL,
+ elfcpp::SHT_RELA,
+ r_type,
+ gsym);
+}
+
+template<int size, bool big_endian>
+inline void
+Target_mips<size, big_endian>::Scan::global(
+ Symbol_table* symtab,
+ Layout* layout,
+ Target_mips<size, big_endian>* target,
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int data_shndx,
+ Output_section* output_section,
+ const elfcpp::Rel<size, big_endian>& reloc,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ global(
+ symtab,
+ layout,
+ target,
+ object,
+ data_shndx,
+ output_section,
+ (const elfcpp::Rela<size, big_endian>*) NULL,
+ &reloc,
+ elfcpp::SHT_REL,
+ r_type,
+ gsym);
+}
+
+// Return whether a R_MIPS_32 relocation needs to be applied.
+
+template<int size, bool big_endian>
+inline bool
+Target_mips<size, big_endian>::Relocate::should_apply_r_mips_32_reloc(
+ const Mips_symbol<size>* gsym,
+ unsigned int r_type,
+ Output_section* output_section,
+ Target_mips* target)
+{
+ // If the output section is not allocated, then we didn't call
+ // scan_relocs, we didn't create a dynamic reloc, and we must apply
+ // the reloc here.
+ if ((output_section->flags() & elfcpp::SHF_ALLOC) == 0)
+ return true;
+
+ if (gsym == NULL)
+ return true;
+ else
+ {
+ // For global symbols, we use the same helper routines used in the
+ // scan pass.
+ if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))
+ && !gsym->may_need_copy_reloc())
+ {
+ // We have generated dynamic reloc (R_MIPS_REL32).
+
+ bool multi_got = false;
+ if (target->has_got_section())
+ multi_got = target->got_section()->multi_got();
+ bool has_got_offset;
+ if (!multi_got)
+ has_got_offset = gsym->has_got_offset(GOT_TYPE_STANDARD);
+ else
+ has_got_offset = gsym->global_gotoffset() != -1U;
+ if (!has_got_offset)
+ return true;
+ else
+ // Apply the relocation only if the symbol is in the local got.
+ // Do not apply the relocation if the symbol is in the global
+ // got.
+ return symbol_references_local(gsym, gsym->has_dynsym_index());
+ }
+ else
+ // We have not generated dynamic reloc.
+ return true;
+ }
+}
+
+// Perform a relocation.
+
+template<int size, bool big_endian>
+inline bool
+Target_mips<size, big_endian>::Relocate::relocate(
+ const Relocate_info<size, big_endian>* relinfo,
+ Target_mips* target,
+ Output_section* output_section,
+ size_t relnum,
+ const elfcpp::Rela<size, big_endian>* rela,
+ const elfcpp::Rel<size, big_endian>* rel,
+ unsigned int rel_type,
+ unsigned int r_type,
+ const Sized_symbol<size>* gsym,
+ const Symbol_value<size>* psymval,
+ unsigned char* view,
+ Mips_address address,
+ section_size_type)
+{
+ Mips_address r_offset;
+ typename elfcpp::Elf_types<size>::Elf_WXword r_info;
+ typename elfcpp::Elf_types<size>::Elf_Swxword r_addend;
+
+ if (rel_type == elfcpp::SHT_RELA)
+ {
+ r_offset = rela->get_r_offset();
+ r_info = rela->get_r_info();
+ r_addend = rela->get_r_addend();
+ }
+ else
+ {
+ r_offset = rel->get_r_offset();
+ r_info = rel->get_r_info();
+ r_addend = 0;
+ }
+
+ typedef Mips_relocate_functions<size, big_endian> Reloc_funcs;
+ typename Reloc_funcs::Status reloc_status = Reloc_funcs::STATUS_OKAY;
+
+ Mips_relobj<size, big_endian>* object =
+ Mips_relobj<size, big_endian>::as_mips_relobj(relinfo->object);
+
+ unsigned int r_sym = elfcpp::elf_r_sym<size>(r_info);
+ bool target_is_16_bit_code = false;
+ bool target_is_micromips_code = false;
+ bool cross_mode_jump;
+
+ Symbol_value<size> symval;
+
+ const Mips_symbol<size>* mips_sym = Mips_symbol<size>::as_mips_sym(gsym);
+
+ bool changed_symbol_value = false;
+ if (gsym == NULL)
+ {
+ target_is_16_bit_code = object->local_symbol_is_mips16(r_sym);
+ target_is_micromips_code = object->local_symbol_is_micromips(r_sym);
+ if (target_is_16_bit_code || target_is_micromips_code)
+ {
+ // MIPS16/microMIPS text labels should be treated as odd.
+ symval.set_output_value(psymval->value(object, 1));
+ psymval = &symval;
+ changed_symbol_value = true;
+ }
+ }
+ else
+ {
+ target_is_16_bit_code = mips_sym->is_mips16();
+ target_is_micromips_code = mips_sym->is_micromips();
+
+ // If this is a mips16/microMIPS text symbol, add 1 to the value to make
+ // it odd. This will cause something like .word SYM to come up with
+ // the right value when it is loaded into the PC.
+
+ if ((mips_sym->is_mips16() || mips_sym->is_micromips())
+ && psymval->value(object, 0) != 0)
+ {
+ symval.set_output_value(psymval->value(object, 0) | 1);
+ psymval = &symval;
+ changed_symbol_value = true;
+ }
+
+ // Pick the value to use for symbols defined in shared objects.
+ if (mips_sym->use_plt_offset(Scan::get_reference_flags(r_type))
+ || mips_sym->has_lazy_stub())
+ {
+ Mips_address value;
+ if (!mips_sym->has_lazy_stub())
+ {
+ // Prefer a standard MIPS PLT entry.
+ if (mips_sym->has_mips_plt_offset())
+ {
+ value = target->plt_section()->mips_entry_address(mips_sym);
+ target_is_micromips_code = false;
+ target_is_16_bit_code = false;
+ }
+ else
+ {
+ value = (target->plt_section()->comp_entry_address(mips_sym)
+ + 1);
+ if (target->is_output_micromips())
+ target_is_micromips_code = true;
+ else
+ target_is_16_bit_code = true;
+ }
+ }
+ else
+ value = target->mips_stubs_section()->stub_address(mips_sym);
+
+ symval.set_output_value(value);
+ psymval = &symval;
+ }
+ }
+
+ // TRUE if the symbol referred to by this relocation is "_gp_disp".
+ // Note that such a symbol must always be a global symbol.
+ bool gp_disp = (gsym != NULL && (strcmp(gsym->name(), "_gp_disp") == 0)
+ && !object->is_newabi());
+
+ // TRUE if the symbol referred to by this relocation is "__gnu_local_gp".
+ // Note that such a symbol must always be a global symbol.
+ bool gnu_local_gp = gsym && (strcmp(gsym->name(), "__gnu_local_gp") == 0);
+
+
+ if (gp_disp)
+ {
+ if (!hi16_reloc(r_type) && !lo16_reloc(r_type))
+ gold_error_at_location(relinfo, relnum, r_offset,
+ _("relocations against _gp_disp are permitted only"
+ " with R_MIPS_HI16 and R_MIPS_LO16 relocations."));
+ }
+ else if (gnu_local_gp)
+ {
+ // __gnu_local_gp is _gp symbol.
+ symval.set_output_value(target->adjusted_gp_value(object));
+ psymval = &symval;
+ }
+
+ // If this is a reference to a 16-bit function with a stub, we need
+ // to redirect the relocation to the stub unless:
+ //
+ // (a) the relocation is for a MIPS16 JAL;
+ //
+ // (b) the relocation is for a MIPS16 PIC call, and there are no
+ // non-MIPS16 uses of the GOT slot; or
+ //
+ // (c) the section allows direct references to MIPS16 functions.
+ if (r_type != elfcpp::R_MIPS16_26
+ && !parameters->options().relocatable()
+ && ((mips_sym != NULL
+ && mips_sym->has_mips16_fn_stub()
+ && (r_type != elfcpp::R_MIPS16_CALL16 || mips_sym->need_fn_stub()))
+ || (mips_sym == NULL
+ && object->get_local_mips16_fn_stub(r_sym) != NULL))
+ && !object->section_allows_mips16_refs(relinfo->data_shndx))
+ {
+ // This is a 32- or 64-bit call to a 16-bit function. We should
+ // have already noticed that we were going to need the
+ // stub.
+ Mips_address value;
+ if (mips_sym == NULL)
+ value = object->get_local_mips16_fn_stub(r_sym)->output_address();
+ else
+ {
+ gold_assert(mips_sym->need_fn_stub());
+ if (mips_sym->has_la25_stub())
+ value = target->la25_stub_section()->stub_address(mips_sym);
+ else
+ {
+ value = mips_sym->template
+ get_mips16_fn_stub<big_endian>()->output_address();
+ }
+ }
+ symval.set_output_value(value);
+ psymval = &symval;
+ changed_symbol_value = true;
+
+ // The target is 16-bit, but the stub isn't.
+ target_is_16_bit_code = false;
+ }
+ // If this is a MIPS16 call with a stub, that is made through the PLT or
+ // to a standard MIPS function, we need to redirect the call to the stub.
+ // Note that we specifically exclude R_MIPS16_CALL16 from this behavior;
+ // indirect calls should use an indirect stub instead.
+ else if (r_type == elfcpp::R_MIPS16_26 && !parameters->options().relocatable()
+ && ((mips_sym != NULL
+ && (mips_sym->has_mips16_call_stub()
+ || mips_sym->has_mips16_call_fp_stub()))
+ || (mips_sym == NULL
+ && object->get_local_mips16_call_stub(r_sym) != NULL))
+ && ((mips_sym != NULL && mips_sym->has_plt_offset())
+ || !target_is_16_bit_code))
+ {
+ Mips16_stub_section<size, big_endian>* call_stub;
+ if (mips_sym == NULL)
+ call_stub = object->get_local_mips16_call_stub(r_sym);
+ else
+ {
+ // If both call_stub and call_fp_stub are defined, we can figure
+ // out which one to use by checking which one appears in the input
+ // file.
+ if (mips_sym->has_mips16_call_stub()
+ && mips_sym->has_mips16_call_fp_stub())
+ {
+ call_stub = NULL;
+ for (unsigned int i = 1; i < object->shnum(); ++i)
+ {
+ if (object->is_mips16_call_fp_stub_section(i))
+ {
+ call_stub = mips_sym->template
+ get_mips16_call_fp_stub<big_endian>();
+ break;
+ }
+
+ }
+ if (call_stub == NULL)
+ call_stub =
+ mips_sym->template get_mips16_call_stub<big_endian>();
+ }
+ else if (mips_sym->has_mips16_call_stub())
+ call_stub = mips_sym->template get_mips16_call_stub<big_endian>();
+ else
+ call_stub = mips_sym->template get_mips16_call_fp_stub<big_endian>();
+ }
+
+ symval.set_output_value(call_stub->output_address());
+ psymval = &symval;
+ changed_symbol_value = true;
+ }
+ // If this is a direct call to a PIC function, redirect to the
+ // non-PIC stub.
+ else if (mips_sym != NULL
+ && mips_sym->has_la25_stub()
+ && relocation_needs_la25_stub<size, big_endian>(
+ object, r_type, target_is_16_bit_code))
+ {
+ Mips_address value = target->la25_stub_section()->stub_address(mips_sym);
+ if (mips_sym->is_micromips())
+ value += 1;
+ symval.set_output_value(value);
+ psymval = &symval;
+ }
+ // For direct MIPS16 and microMIPS calls make sure the compressed PLT
+ // entry is used if a standard PLT entry has also been made.
+ else if ((r_type == elfcpp::R_MIPS16_26
+ || r_type == elfcpp::R_MICROMIPS_26_S1)
+ && !parameters->options().relocatable()
+ && mips_sym != NULL
+ && mips_sym->has_plt_offset()
+ && mips_sym->has_comp_plt_offset()
+ && mips_sym->has_mips_plt_offset())
+ {
+ Mips_address value = (target->plt_section()->comp_entry_address(mips_sym)
+ + 1);
+ symval.set_output_value(value);
+ psymval = &symval;
+
+ target_is_16_bit_code = !target->is_output_micromips();
+ target_is_micromips_code = target->is_output_micromips();
+ }
+
+ // Make sure MIPS16 and microMIPS are not used together.
+ if ((r_type == elfcpp::R_MIPS16_26 && target_is_micromips_code)
+ || (micromips_branch_reloc(r_type) && target_is_16_bit_code))
+ {
+ gold_error(_("MIPS16 and microMIPS functions cannot call each other"));
+ }
+
+ // Calls from 16-bit code to 32-bit code and vice versa require the
+ // mode change. However, we can ignore calls to undefined weak symbols,
+ // which should never be executed at runtime. This exception is important
+ // because the assembly writer may have "known" that any definition of the
+ // symbol would be 16-bit code, and that direct jumps were therefore
+ // acceptable.
+ cross_mode_jump =
+ (!parameters->options().relocatable()
+ && !(gsym != NULL && gsym->is_weak_undefined())
+ && ((r_type == elfcpp::R_MIPS16_26 && !target_is_16_bit_code)
+ || (r_type == elfcpp::R_MICROMIPS_26_S1 && !target_is_micromips_code)
+ || ((r_type == elfcpp::R_MIPS_26 || r_type == elfcpp::R_MIPS_JALR)
+ && (target_is_16_bit_code || target_is_micromips_code))));
+
+ bool local = (mips_sym == NULL
+ || (mips_sym->got_only_for_calls()
+ ? symbol_calls_local(mips_sym, mips_sym->has_dynsym_index())
+ : symbol_references_local(mips_sym,
+ mips_sym->has_dynsym_index())));
+
+ // Global R_MIPS_GOT_PAGE/R_MICROMIPS_GOT_PAGE relocations are equivalent
+ // to R_MIPS_GOT_DISP/R_MICROMIPS_GOT_DISP. The addend is applied by the
+ // corresponding R_MIPS_GOT_OFST/R_MICROMIPS_GOT_OFST.
+ if (got_page_reloc(r_type) && !local)
+ r_type = (micromips_reloc(r_type) ? elfcpp::R_MICROMIPS_GOT_DISP
+ : elfcpp::R_MIPS_GOT_DISP);
+
+ unsigned int got_offset = 0;
+ int gp_offset = 0;
+
+ bool update_got_entry = false;
+ bool extract_addend = rel_type == elfcpp::SHT_REL;
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_NONE:
+ break;
+ case elfcpp::R_MIPS_16:
+ reloc_status = Reloc_funcs::rel16(view, object, psymval, r_addend,
+ extract_addend, r_type);
+ break;
+
+ case elfcpp::R_MIPS_32:
+ if (should_apply_r_mips_32_reloc(mips_sym, r_type, output_section,
+ target))
+ reloc_status = Reloc_funcs::rel32(view, object, psymval, r_addend,
+ extract_addend, r_type);
+ if (mips_sym != NULL
+ && (mips_sym->is_mips16() || mips_sym->is_micromips())
+ && mips_sym->global_got_area() == GGA_RELOC_ONLY)
+ {
+ // If mips_sym->has_mips16_fn_stub() is false, symbol value is
+ // already updated by adding +1.
+ if (mips_sym->has_mips16_fn_stub())
+ {
+ gold_assert(mips_sym->need_fn_stub());
+ Mips16_stub_section<size, big_endian>* fn_stub =
+ mips_sym->template get_mips16_fn_stub<big_endian>();
+
+ symval.set_output_value(fn_stub->output_address());
+ psymval = &symval;
+ }
+ got_offset = mips_sym->global_gotoffset();
+ update_got_entry = true;
+ }
+ break;
+
+ case elfcpp::R_MIPS_REL32:
+ gold_unreachable();
+
+ case elfcpp::R_MIPS_PC32:
+ reloc_status = Reloc_funcs::relpc32(view, object, psymval, address,
+ r_addend, extract_addend, r_type);
+ break;
+
+ case elfcpp::R_MIPS16_26:
+ // The calculation for R_MIPS16_26 is just the same as for an
+ // R_MIPS_26. It's only the storage of the relocated field into
+ // the output file that's different. So, we just fall through to the
+ // R_MIPS_26 case here.
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MICROMIPS_26_S1:
+ reloc_status = Reloc_funcs::rel26(view, object, psymval, address,
+ gsym == NULL, r_addend, extract_addend, gsym, cross_mode_jump, r_type,
+ target->jal_to_bal());
+ break;
+
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MICROMIPS_HI16:
+ reloc_status = Reloc_funcs::relhi16(view, object, psymval, r_addend,
+ address, gp_disp, r_type,
+ extract_addend);
+ break;
+
+ case elfcpp::R_MIPS_LO16:
+ case elfcpp::R_MIPS16_LO16:
+ case elfcpp::R_MICROMIPS_LO16:
+ case elfcpp::R_MICROMIPS_HI0_LO16:
+ reloc_status = Reloc_funcs::rello16(target, view, object, psymval,
+ r_addend, extract_addend, address,
+ gp_disp, r_type);
+ break;
+
+ case elfcpp::R_MIPS_LITERAL:
+ case elfcpp::R_MICROMIPS_LITERAL:
+ // Because we don't merge literal sections, we can handle this
+ // just like R_MIPS_GPREL16. In the long run, we should merge
+ // shared literals, and then we will need to additional work
+ // here.
+
+ // Fall through.
+
+ case elfcpp::R_MIPS_GPREL16:
+ case elfcpp::R_MIPS16_GPREL:
+ case elfcpp::R_MICROMIPS_GPREL7_S2:
+ case elfcpp::R_MICROMIPS_GPREL16:
+ reloc_status = Reloc_funcs::relgprel(view, object, psymval,
+ target->adjusted_gp_value(object),
+ r_addend, extract_addend,
+ gsym == NULL, r_type);
+ break;
+
+ case elfcpp::R_MIPS_PC16:
+ reloc_status = Reloc_funcs::relpc16(view, object, psymval, address,
+ r_addend, extract_addend, r_type);
+ break;
+ case elfcpp::R_MICROMIPS_PC7_S1:
+ reloc_status = Reloc_funcs::relmicromips_pc7_s1(view, object, psymval,
+ address, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MICROMIPS_PC10_S1:
+ reloc_status = Reloc_funcs::relmicromips_pc10_s1(view, object, psymval,
+ address, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MICROMIPS_PC16_S1:
+ reloc_status = Reloc_funcs::relmicromips_pc16_s1(view, object, psymval,
+ address, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_GPREL32:
+ reloc_status = Reloc_funcs::relgprel32(view, object, psymval,
+ target->adjusted_gp_value(object),
+ r_addend, extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ if (gsym != NULL)
+ got_offset = target->got_section()->got_offset(gsym, GOT_TYPE_STANDARD,
+ object);
+ else
+ got_offset = target->got_section()->got_offset(r_sym, GOT_TYPE_STANDARD,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot_hi16(view, gp_offset, r_type);
+ update_got_entry = changed_symbol_value;
+ break;
+
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ if (gsym != NULL)
+ got_offset = target->got_section()->got_offset(gsym, GOT_TYPE_STANDARD,
+ object);
+ else
+ got_offset = target->got_section()->got_offset(r_sym, GOT_TYPE_STANDARD,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot_lo16(view, gp_offset, r_type);
+ update_got_entry = changed_symbol_value;
+ break;
+
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MICROMIPS_GOT_DISP:
+ if (gsym != NULL)
+ got_offset = target->got_section()->got_offset(gsym, GOT_TYPE_STANDARD,
+ object);
+ else
+ got_offset = target->got_section()->got_offset(r_sym, GOT_TYPE_STANDARD,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ break;
+
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ gold_assert(gsym != NULL);
+ got_offset = target->got_section()->got_offset(gsym, GOT_TYPE_STANDARD,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ // TODO(sasa): We should also initialize update_got_entry in other places
+ // where relgot is called.
+ update_got_entry = changed_symbol_value;
+ break;
+
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MICROMIPS_GOT16:
+ if (gsym != NULL)
+ {
+ got_offset = target->got_section()->got_offset(gsym,
+ GOT_TYPE_STANDARD,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ }
+ else
+ reloc_status = Reloc_funcs::relgot16_local(view, object, psymval,
+ r_addend, extract_addend,
+ r_type);
+ update_got_entry = changed_symbol_value;
+ break;
+
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ if (gsym != NULL)
+ got_offset = target->got_section()->got_offset(gsym, GOT_TYPE_TLS_PAIR,
+ object);
+ else
+ got_offset = target->got_section()->got_offset(r_sym, GOT_TYPE_TLS_PAIR,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ break;
+
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ if (gsym != NULL)
+ got_offset = target->got_section()->got_offset(gsym,
+ GOT_TYPE_TLS_OFFSET,
+ object);
+ else
+ got_offset = target->got_section()->got_offset(r_sym,
+ GOT_TYPE_TLS_OFFSET,
+ object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ break;
+
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS16_TLS_LDM:
+ case elfcpp::R_MICROMIPS_TLS_LDM:
+ // Relocate the field with the offset of the GOT entry for
+ // the module index.
+ got_offset = target->got_section()->tls_ldm_offset(object);
+ gp_offset = target->got_section()->gp_offset(got_offset, object);
+ reloc_status = Reloc_funcs::relgot(view, gp_offset, r_type);
+ break;
+
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MICROMIPS_GOT_PAGE:
+ reloc_status = Reloc_funcs::relgotpage(target, view, object, psymval,
+ r_addend, extract_addend, r_type);
+ break;
+
+ case elfcpp::R_MIPS_GOT_OFST:
+ case elfcpp::R_MICROMIPS_GOT_OFST:
+ reloc_status = Reloc_funcs::relgotofst(target, view, object, psymval,
+ r_addend, extract_addend, local,
+ r_type);
+ break;
+
+ case elfcpp::R_MIPS_JALR:
+ case elfcpp::R_MICROMIPS_JALR:
+ // This relocation is only a hint. In some cases, we optimize
+ // it into a bal instruction. But we don't try to optimize
+ // when the symbol does not resolve locally.
+ if (gsym == NULL || symbol_calls_local(gsym, gsym->has_dynsym_index()))
+ reloc_status = Reloc_funcs::reljalr(view, object, psymval, address,
+ r_addend, extract_addend,
+ cross_mode_jump, r_type,
+ target->jalr_to_bal(),
+ target->jr_to_b());
+ break;
+
+ case elfcpp::R_MIPS_TLS_DTPREL_HI16:
+ case elfcpp::R_MIPS16_TLS_DTPREL_HI16:
+ case elfcpp::R_MICROMIPS_TLS_DTPREL_HI16:
+ reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval,
+ elfcpp::DTP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_TLS_DTPREL_LO16:
+ case elfcpp::R_MIPS16_TLS_DTPREL_LO16:
+ case elfcpp::R_MICROMIPS_TLS_DTPREL_LO16:
+ reloc_status = Reloc_funcs::tlsrello16(view, object, psymval,
+ elfcpp::DTP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_TLS_DTPREL32:
+ case elfcpp::R_MIPS_TLS_DTPREL64:
+ reloc_status = Reloc_funcs::tlsrel32(view, object, psymval,
+ elfcpp::DTP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_TLS_TPREL_HI16:
+ case elfcpp::R_MIPS16_TLS_TPREL_HI16:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
+ reloc_status = Reloc_funcs::tlsrelhi16(view, object, psymval,
+ elfcpp::TP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_TLS_TPREL_LO16:
+ case elfcpp::R_MIPS16_TLS_TPREL_LO16:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
+ reloc_status = Reloc_funcs::tlsrello16(view, object, psymval,
+ elfcpp::TP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_TLS_TPREL32:
+ case elfcpp::R_MIPS_TLS_TPREL64:
+ reloc_status = Reloc_funcs::tlsrel32(view, object, psymval,
+ elfcpp::TP_OFFSET, r_addend,
+ extract_addend, r_type);
+ break;
+ case elfcpp::R_MIPS_SUB:
+ case elfcpp::R_MICROMIPS_SUB:
+ reloc_status = Reloc_funcs::relsub(view, object, psymval, r_addend,
+ extract_addend, r_type);
+ break;
+ default:
+ gold_error_at_location(relinfo, relnum, r_offset,
+ _("unsupported reloc %u"), r_type);
+ break;
+ }
+
+ if (update_got_entry)
+ {
+ Mips_output_data_got<size, big_endian>* got = target->got_section();
+ if (mips_sym != NULL && mips_sym->get_applied_secondary_got_fixup())
+ got->update_got_entry(got->get_primary_got_offset(mips_sym),
+ psymval->value(object, 0));
+ else
+ got->update_got_entry(got_offset, psymval->value(object, 0));
+ }
+
+ // Report any errors.
+ switch (reloc_status)
+ {
+ case Reloc_funcs::STATUS_OKAY:
+ break;
+ case Reloc_funcs::STATUS_OVERFLOW:
+ gold_error_at_location(relinfo, relnum, r_offset,
+ _("relocation overflow"));
+ break;
+ case Reloc_funcs::STATUS_BAD_RELOC:
+ gold_error_at_location(relinfo, relnum, r_offset,
+ _("unexpected opcode while processing relocation"));
+ break;
+ default:
+ gold_unreachable();
+ }
+
+ return true;
+}
+
+template<int size, bool big_endian>
+inline bool
+Target_mips<size, big_endian>::Relocate::relocate(
+ const Relocate_info<size, big_endian>* relinfo,
+ Target_mips* target,
+ Output_section* output_section,
+ size_t relnum,
+ const elfcpp::Rela<size, big_endian>& reloc,
+ unsigned int r_type,
+ const Sized_symbol<size>* gsym,
+ const Symbol_value<size>* psymval,
+ unsigned char* view,
+ Mips_address address,
+ section_size_type view_size)
+{
+ return relocate(
+ relinfo,
+ target,
+ output_section,
+ relnum,
+ &reloc,
+ (const elfcpp::Rel<size, big_endian>*) NULL,
+ elfcpp::SHT_RELA,
+ r_type,
+ gsym,
+ psymval,
+ view,
+ address,
+ view_size);
+}
+
+template<int size, bool big_endian>
+inline bool
+Target_mips<size, big_endian>::Relocate::relocate(
+ const Relocate_info<size, big_endian>* relinfo,
+ Target_mips* target,
+ Output_section* output_section,
+ size_t relnum,
+ const elfcpp::Rel<size, big_endian>& reloc,
+ unsigned int r_type,
+ const Sized_symbol<size>* gsym,
+ const Symbol_value<size>* psymval,
+ unsigned char* view,
+ Mips_address address,
+ section_size_type view_size)
+{
+ return relocate(
+ relinfo,
+ target,
+ output_section,
+ relnum,
+ (const elfcpp::Rela<size, big_endian>*) NULL,
+ &reloc,
+ elfcpp::SHT_REL,
+ r_type,
+ gsym,
+ psymval,
+ view,
+ address,
+ view_size);
+}
+
+// Get the Reference_flags for a particular relocation.
+
+template<int size, bool big_endian>
+int
+Target_mips<size, big_endian>::Scan::get_reference_flags(
+ unsigned int r_type)
+{
+ switch (r_type)
+ {
+ case elfcpp::R_MIPS_NONE:
+ // No symbol reference.
+ return 0;
+
+ case elfcpp::R_MIPS_16:
+ case elfcpp::R_MIPS_32:
+ case elfcpp::R_MIPS_64:
+ case elfcpp::R_MIPS_HI16:
+ case elfcpp::R_MIPS_LO16:
+ case elfcpp::R_MIPS16_HI16:
+ case elfcpp::R_MIPS16_LO16:
+ case elfcpp::R_MICROMIPS_HI16:
+ case elfcpp::R_MICROMIPS_LO16:
+ return Symbol::ABSOLUTE_REF;
+
+ case elfcpp::R_MIPS_26:
+ case elfcpp::R_MIPS16_26:
+ case elfcpp::R_MICROMIPS_26_S1:
+ return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
+
+ case elfcpp::R_MIPS_GPREL32:
+ case elfcpp::R_MIPS_GPREL16:
+ case elfcpp::R_MIPS_REL32:
+ case elfcpp::R_MIPS16_GPREL:
+ return Symbol::RELATIVE_REF;
+
+ case elfcpp::R_MIPS_PC16:
+ case elfcpp::R_MIPS_PC32:
+ case elfcpp::R_MIPS_JALR:
+ case elfcpp::R_MICROMIPS_JALR:
+ return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
+
+ case elfcpp::R_MIPS_GOT16:
+ case elfcpp::R_MIPS_CALL16:
+ case elfcpp::R_MIPS_GOT_DISP:
+ case elfcpp::R_MIPS_GOT_HI16:
+ case elfcpp::R_MIPS_GOT_LO16:
+ case elfcpp::R_MIPS_CALL_HI16:
+ case elfcpp::R_MIPS_CALL_LO16:
+ case elfcpp::R_MIPS_LITERAL:
+ case elfcpp::R_MIPS_GOT_PAGE:
+ case elfcpp::R_MIPS_GOT_OFST:
+ case elfcpp::R_MIPS16_GOT16:
+ case elfcpp::R_MIPS16_CALL16:
+ case elfcpp::R_MICROMIPS_GOT16:
+ case elfcpp::R_MICROMIPS_CALL16:
+ case elfcpp::R_MICROMIPS_GOT_HI16:
+ case elfcpp::R_MICROMIPS_GOT_LO16:
+ case elfcpp::R_MICROMIPS_CALL_HI16:
+ case elfcpp::R_MICROMIPS_CALL_LO16:
+ // Absolute in GOT.
+ return Symbol::RELATIVE_REF;
+
+ case elfcpp::R_MIPS_TLS_DTPMOD32:
+ case elfcpp::R_MIPS_TLS_DTPREL32:
+ case elfcpp::R_MIPS_TLS_DTPMOD64:
+ case elfcpp::R_MIPS_TLS_DTPREL64:
+ case elfcpp::R_MIPS_TLS_GD:
+ case elfcpp::R_MIPS_TLS_LDM:
+ case elfcpp::R_MIPS_TLS_DTPREL_HI16:
+ case elfcpp::R_MIPS_TLS_DTPREL_LO16:
+ case elfcpp::R_MIPS_TLS_GOTTPREL:
+ case elfcpp::R_MIPS_TLS_TPREL32:
+ case elfcpp::R_MIPS_TLS_TPREL64:
+ case elfcpp::R_MIPS_TLS_TPREL_HI16:
+ case elfcpp::R_MIPS_TLS_TPREL_LO16:
+ case elfcpp::R_MIPS16_TLS_GD:
+ case elfcpp::R_MIPS16_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_GD:
+ case elfcpp::R_MICROMIPS_TLS_GOTTPREL:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_HI16:
+ case elfcpp::R_MICROMIPS_TLS_TPREL_LO16:
+ return Symbol::TLS_REF;
+
+ case elfcpp::R_MIPS_COPY:
+ case elfcpp::R_MIPS_JUMP_SLOT:
+ default:
+ gold_unreachable();
+ // Not expected. We will give an error later.
+ return 0;
+ }
+}
+
+// Report an unsupported relocation against a local symbol.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::Scan::unsupported_reloc_local(
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int r_type)
+{
+ gold_error(_("%s: unsupported reloc %u against local symbol"),
+ object->name().c_str(), r_type);
+}
+
+// Report an unsupported relocation against a global symbol.
+
+template<int size, bool big_endian>
+void
+Target_mips<size, big_endian>::Scan::unsupported_reloc_global(
+ Sized_relobj_file<size, big_endian>* object,
+ unsigned int r_type,
+ Symbol* gsym)
+{
+ gold_error(_("%s: unsupported reloc %u against global symbol %s"),
+ object->name().c_str(), r_type, gsym->demangled_name().c_str());
+}
+
+// Return printable name for ABI.
+template<int size, bool big_endian>
+const char*
+Target_mips<size, big_endian>::elf_mips_abi_name(elfcpp::Elf_Word e_flags,
+ unsigned char ei_class)
+{
+ switch (e_flags & elfcpp::EF_MIPS_ABI)
+ {
+ case 0:
+ if ((e_flags & elfcpp::EF_MIPS_ABI2) != 0)
+ return "N32";
+ else if (elfcpp::abi_64(ei_class))
+ return "64";
+ else
+ return "none";
+ case elfcpp::E_MIPS_ABI_O32:
+ return "O32";
+ case elfcpp::E_MIPS_ABI_O64:
+ return "O64";
+ case elfcpp::E_MIPS_ABI_EABI32:
+ return "EABI32";
+ case elfcpp::E_MIPS_ABI_EABI64:
+ return "EABI64";
+ default:
+ return "unknown abi";
+ }
+}
+
+template<int size, bool big_endian>
+const char*
+Target_mips<size, big_endian>::elf_mips_mach_name(elfcpp::Elf_Word e_flags)
+{
+ switch (e_flags & elfcpp::EF_MIPS_MACH)
+ {
+ case elfcpp::E_MIPS_MACH_3900:
+ return "mips:3900";
+ case elfcpp::E_MIPS_MACH_4010:
+ return "mips:4010";
+ case elfcpp::E_MIPS_MACH_4100:
+ return "mips:4100";
+ case elfcpp::E_MIPS_MACH_4111:
+ return "mips:4111";
+ case elfcpp::E_MIPS_MACH_4120:
+ return "mips:4120";
+ case elfcpp::E_MIPS_MACH_4650:
+ return "mips:4650";
+ case elfcpp::E_MIPS_MACH_5400:
+ return "mips:5400";
+ case elfcpp::E_MIPS_MACH_5500:
+ return "mips:5500";
+ case elfcpp::E_MIPS_MACH_SB1:
+ return "mips:sb1";
+ case elfcpp::E_MIPS_MACH_9000:
+ return "mips:9000";
+ case elfcpp::E_MIPS_MACH_LS2E:
+ return "mips:loongson-2e";
+ case elfcpp::E_MIPS_MACH_LS2F:
+ return "mips:loongson-2f";
+ case elfcpp::E_MIPS_MACH_LS3A:
+ return "mips:loongson-3a";
+ case elfcpp::E_MIPS_MACH_OCTEON:
+ return "mips:octeon";
+ case elfcpp::E_MIPS_MACH_OCTEON2:
+ return "mips:octeon2";
+ case elfcpp::E_MIPS_MACH_XLR:
+ return "mips:xlr";
+ default:
+ switch (e_flags & elfcpp::EF_MIPS_ARCH)
+ {
+ default:
+ case elfcpp::E_MIPS_ARCH_1:
+ return "mips:3000";
+
+ case elfcpp::E_MIPS_ARCH_2:
+ return "mips:6000";
+
+ case elfcpp::E_MIPS_ARCH_3:
+ return "mips:4000";
+
+ case elfcpp::E_MIPS_ARCH_4:
+ return "mips:8000";
+
+ case elfcpp::E_MIPS_ARCH_5:
+ return "mips:mips5";
+
+ case elfcpp::E_MIPS_ARCH_32:
+ return "mips:isa32";
+
+ case elfcpp::E_MIPS_ARCH_64:
+ return "mips:isa64";
+
+ case elfcpp::E_MIPS_ARCH_32R2:
+ return "mips:isa32r2";
+
+ case elfcpp::E_MIPS_ARCH_64R2:
+ return "mips:isa64r2";
+ }
+ }
+ return "unknown CPU";
+}
+
+template<int size, bool big_endian>
+Target::Target_info Target_mips<size, big_endian>::mips_info =
+{
+ size, // size
+ big_endian, // is_big_endian
+ elfcpp::EM_MIPS, // machine_code
+ true, // has_make_symbol
+ false, // has_resolve
+ false, // has_code_fill
+ true, // is_default_stack_executable
+ false, // can_icf_inline_merge_sections
+ '\0', // wrap_char
+ "/lib/ld.so.1", // dynamic_linker
+ 0x400000, // default_text_segment_address
+ 64 * 1024, // abi_pagesize (overridable by -z max-page-size)
+ 4 * 1024, // common_pagesize (overridable by -z common-page-size)
+ false, // isolate_execinstr
+ 0, // rosegment_gap
+ elfcpp::SHN_UNDEF, // small_common_shndx
+ elfcpp::SHN_UNDEF, // large_common_shndx
+ 0, // small_common_section_flags
+ 0, // large_common_section_flags
+ NULL, // attributes_section
+ NULL, // attributes_vendor
+ "__start" // entry_symbol_name
+};
+
+// The selector for mips object files.
+
+template<int size, bool big_endian>
+class Target_selector_mips : public Target_selector
+{
+public:
+ Target_selector_mips()
+ : Target_selector(elfcpp::EM_MIPS, size, big_endian,
+ (size == 64 ?
+ (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") :
+ (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")),
+ (size == 64 ?
+ (big_endian ? "elf64-tradbigmips" : "elf64-tradlittlemips") :
+ (big_endian ? "elf32-tradbigmips" : "elf32-tradlittlemips")))
+ { }
+
+ Target* do_instantiate_target()
+ { return new Target_mips<size, big_endian>(); }
+};
+
+Target_selector_mips<32, true> target_selector_mips32be;
+Target_selector_mips<32, false> target_selector_mips32;
+Target_selector_mips<64, true> target_selector_mips64be;
+Target_selector_mips<64, false> target_selector_mips64;
+
+
+} // End anonymous namespace.
projects / binutils-gdb.git / commitdiff