From d03d5626e558272c7d1780ed0c2f0ad71facb11d Mon Sep 17 00:00:00 2001 From: Ian Lance Taylor Date: Fri, 18 Feb 1994 15:37:20 +0000 Subject: [PATCH] Support for PowerPC ELF and PowerPC NetWare. Sanitization to follow. --- bfd/elf32-powerpc.c | 281 +++++++++++++++++ bfd/nlm32-powerpc.c | 739 ++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 1020 insertions(+) create mode 100644 bfd/elf32-powerpc.c create mode 100644 bfd/nlm32-powerpc.c diff --git a/bfd/elf32-powerpc.c b/bfd/elf32-powerpc.c new file mode 100644 index 00000000000..7950133493d --- /dev/null +++ b/bfd/elf32-powerpc.c @@ -0,0 +1,281 @@ +/* PowerPC-specific support for 32-bit ELF + Copyright 1994 Free Software Foundation, Inc. + Written by Ian Lance Taylor, Cygnus Support. + +This file is part of BFD, the Binary File Descriptor library. + +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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* I wrote this file without the benefit of a PowerPC ELF ABI. Thus, + it probably does not correspond to whatever people finally settle + on. Ian Taylor. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" +#include "libelf.h" + +static bfd_reloc_status_type powerpc_elf_toc16_reloc PARAMS ((bfd *abfd, + arelent *reloc, + asymbol *symbol, + PTR data, + asection *sec, + bfd *output_bfd, + char **error)); +static bfd_reloc_status_type powerpc_elf_b26_reloc PARAMS ((bfd *abfd, + arelent *reloc, + asymbol *symbol, + PTR data, + asection *sec, + bfd *output_bfd, + char **error)); +static const struct reloc_howto_struct *bfd_elf32_bfd_reloc_type_lookup + PARAMS ((bfd *abfd, bfd_reloc_code_real_type code)); +static void powerpc_info_to_howto_rel + PARAMS ((bfd *abfd, arelent *cache_ptr, Elf32_Internal_Rel *dst)); + +#define USE_REL + +enum reloc_type +{ + R_POWERPC_NONE = 0, + R_POWERPC_32, + R_POWERPC_B26, + R_POWERPC_BA26, + R_POWERPC_TOC16, + R_POWERPC_max +}; + +static reloc_howto_type elf_powerpc_howto_table[] = +{ + /* This relocation does not do anything. */ + HOWTO (R_POWERPC_NONE, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_POWERPC_NONE", /* name */ + true, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + /* Standard 32 bit relocation. */ + HOWTO (R_POWERPC_32, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_POWERPC_32", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 26 bit relative branch. */ + HOWTO (R_POWERPC_B26, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + powerpc_elf_b26_reloc, /* special_function */ + "R_POWERPC_B26", /* name */ + true, /* partial_inplace */ + 0x3fffffc, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* 26 bit absolute branch. */ + HOWTO (R_POWERPC_BA26, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + bfd_elf_generic_reloc, /* special_function */ + "R_POWERPC_BA26", /* name */ + true, /* partial_inplace */ + 0x3fffffc, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16 bit reference to TOC section. */ + HOWTO (R_POWERPC_TOC16, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + powerpc_elf_toc16_reloc, /* special_function */ + "R_POWERPC_TOC16", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ +}; + +/* Handle the TOC16 reloc. We want to use the offset within the .toc + section, not the actual VMA. */ + +static bfd_reloc_status_type +powerpc_elf_toc16_reloc (abfd, + reloc_entry, + symbol, + data, + input_section, + output_bfd, + error_message) + bfd *abfd; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message; +{ + asection *sec; + + /* Simply adjust the reloc addend by the negative of the VMA of the + .toc section. */ + sec = bfd_get_section (*reloc_entry->sym_ptr_ptr); + if (sec == &bfd_und_section) + return bfd_reloc_continue; + BFD_ASSERT (strcmp (bfd_get_section_name (abfd, sec), ".toc") == 0); + reloc_entry->addend -= sec->output_section->vma; + return bfd_reloc_continue; +} + +/* Handle a branch. If the next instruction is the special + instruction "cror 31,31,31", and this branch is to a stub routine + we have created, we must change the cror instruction into an + instruction which reloads the TOC register. We can detect a stub + routine because it is in a BFD named "linker stubs". FIXME: What a + hack. */ + +static bfd_reloc_status_type +powerpc_elf_b26_reloc (abfd, + reloc_entry, + symbol, + data, + input_section, + output_bfd, + error_message) + bfd *abfd; + arelent *reloc_entry; + asymbol *symbol; + PTR data; + asection *input_section; + bfd *output_bfd; + char **error_message; +{ + if (bfd_get_section (symbol) != &bfd_und_section + && (strcmp (bfd_get_section (symbol)->owner->filename, "linker stubs") + == 0)) + { + bfd_vma val; + + /* This symbol is a stub created by the linker. */ + val = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address + 4); + if (val == 0x4ffffb82) /* cror 31,31,31 */ + bfd_put_32 (abfd, (bfd_vma) 0x80410014, /* l r2,20(r1) */ + (bfd_byte *) data + reloc_entry->address + 4); + } + + if (output_bfd != (bfd *) NULL + && bfd_get_section (symbol) == &bfd_und_section) + { + bfd_size_type address; + + /* If we are generating relocateable output, and the symbol is + undefined, we just want to adjust the reloc by the amount the + section moved. */ + address = reloc_entry->address; + reloc_entry->address += input_section->output_offset; + return _bfd_relocate_contents (reloc_entry->howto, abfd, + - input_section->output_offset, + (bfd_byte *) data + address); + } + + /* Otherwise, let bfd_perform_relocation handle it. */ + return bfd_reloc_continue; +} + +/* Map BFD reloc types to PowerPC ELF reloc types. */ + +struct powerpc_reloc_map +{ + unsigned char bfd_reloc_val; + unsigned char elf_reloc_val; +}; + +static const struct powerpc_reloc_map powerpc_reloc_map[] = +{ + { BFD_RELOC_NONE, R_POWERPC_NONE, }, + { BFD_RELOC_32, R_POWERPC_32 }, + { BFD_RELOC_CTOR, R_POWERPC_32 }, + { BFD_RELOC_PPC_B26, R_POWERPC_B26 }, + { BFD_RELOC_PPC_BA26, R_POWERPC_BA26 }, + { BFD_RELOC_PPC_TOC16, R_POWERPC_TOC16 } +}; + +static const struct reloc_howto_struct * +bfd_elf32_bfd_reloc_type_lookup (abfd, code) + bfd *abfd; + bfd_reloc_code_real_type code; +{ + int i; + + for (i = 0; + i < sizeof (powerpc_reloc_map) / sizeof (struct powerpc_reloc_map); + i++) + { + if (powerpc_reloc_map[i].bfd_reloc_val == code) + return &elf_powerpc_howto_table[powerpc_reloc_map[i].elf_reloc_val]; + } + + return NULL; +} + +/* Set the howto pointer for a PowerPC ELF reloc. */ + +static void +powerpc_info_to_howto_rel (abfd, cache_ptr, dst) + bfd *abfd; + arelent *cache_ptr; + Elf32_Internal_Rel *dst; +{ + BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_POWERPC_max); + cache_ptr->howto = &elf_powerpc_howto_table[ELF32_R_TYPE(dst->r_info)]; +} + +#define TARGET_BIG_SYM bfd_elf32_powerpc_vec +#define TARGET_BIG_NAME "elf32-powerpc" +#define ELF_ARCH bfd_arch_powerpc +#define ELF_MACHINE_CODE EM_CYGNUS_POWERPC +#define ELF_MAXPAGESIZE 0x10000 +#define elf_info_to_howto 0 +#define elf_info_to_howto_rel powerpc_info_to_howto_rel + +#include "elf32-target.h" diff --git a/bfd/nlm32-powerpc.c b/bfd/nlm32-powerpc.c new file mode 100644 index 00000000000..c7c40c69163 --- /dev/null +++ b/bfd/nlm32-powerpc.c @@ -0,0 +1,739 @@ +/* Support for 32-bit PowerPC NLM (NetWare Loadable Module) + Copyright (C) 1994 Free Software Foundation, Inc. + +This file is part of BFD, the Binary File Descriptor library. + +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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ + +#include "bfd.h" +#include "sysdep.h" +#include "libbfd.h" + +#define ARCH_SIZE 32 + +#include "nlm/ppc-ext.h" +#define Nlm_External_Fixed_Header Nlm32_powerpc_External_Fixed_Header + +#include "libnlm.h" + +static boolean nlm_powerpc_backend_object_p + PARAMS ((bfd *)); +static boolean nlm_powerpc_write_prefix + PARAMS ((bfd *)); +static boolean nlm_powerpc_read_reloc + PARAMS ((bfd *, nlmNAME(symbol_type) *, asection **, arelent *)); +static boolean nlm_powerpc_mangle_relocs + PARAMS ((bfd *, asection *, PTR, bfd_vma, bfd_size_type)); +static boolean nlm_powerpc_read_import + PARAMS ((bfd *, nlmNAME(symbol_type) *)); +static boolean nlm_powerpc_write_import + PARAMS ((bfd *, asection *, arelent *)); +static boolean nlm_powerpc_write_external + PARAMS ((bfd *, bfd_size_type, asymbol *, struct reloc_and_sec *)); + +/* PowerPC NLM's have a prefix header before the standard NLM. This + function reads it in, verifies the version, and seeks the bfd to + the location before the regular NLM header. */ + +static boolean +nlm_powerpc_backend_object_p (abfd) + bfd *abfd; +{ + struct nlm32_powerpc_external_prefix_header s; + + if (bfd_read ((PTR) &s, sizeof s, 1, abfd) != sizeof s) + return false; + + if (memcmp (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature) != 0 + || bfd_h_get_32 (abfd, s.headerVersion) != NLM32_POWERPC_HEADER_VERSION) + return false; + + return true; +} + +/* Write out the prefix. */ + +static boolean +nlm_powerpc_write_prefix (abfd) + bfd *abfd; +{ + struct nlm32_powerpc_external_prefix_header s; + + memset (&s, 0, sizeof s); + memcpy (s.signature, NLM32_POWERPC_SIGNATURE, sizeof s.signature); + bfd_h_put_32 (abfd, (bfd_vma) NLM32_POWERPC_HEADER_VERSION, s.headerVersion); + bfd_h_put_32 (abfd, (bfd_vma) 0, s.origins); + + /* FIXME: What should we do about the date? */ + + if (bfd_write ((PTR) &s, sizeof s, 1, abfd) != sizeof s) + return false; + + return true; +} + +/* How to process the various reloc types. PowerPC NLMs use XCOFF + reloc types, and I have just copied the XCOFF reloc table here. */ + +static reloc_howto_type nlm_powerpc_howto_table[] = +{ + /* Standard 32 bit relocation. */ + HOWTO (0, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_POS", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32 bit relocation, but store negative value. */ + HOWTO (1, /* type */ + 0, /* rightshift */ + -2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_NEG", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 32 bit PC relative relocation. */ + HOWTO (2, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "R_REL", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* 16 bit TOC relative relocation. */ + HOWTO (3, /* type */ + 0, /* rightshift */ + 1, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "R_TOC", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* I don't really know what this is. */ + HOWTO (4, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RTB", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* External TOC relative symbol. */ + HOWTO (5, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_GL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Local TOC relative symbol. */ + HOWTO (6, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_TCL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + { 7 }, + + /* Non modifiable absolute branch. */ + HOWTO (8, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_BA", /* name */ + true, /* partial_inplace */ + 0x3fffffc, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + { 9 }, + + /* Non modifiable relative branch. */ + HOWTO (0xa, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + true, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "R_BR", /* name */ + true, /* partial_inplace */ + 0x3fffffc, /* src_mask */ + 0x3fffffc, /* dst_mask */ + false), /* pcrel_offset */ + + { 0xb }, + + /* Indirect load. */ + HOWTO (0xc, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Load address. */ + HOWTO (0xd, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RLA", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + { 0xe }, + + /* Non-relocating reference. */ + HOWTO (0xf, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_REF", /* name */ + false, /* partial_inplace */ + 0, /* src_mask */ + 0, /* dst_mask */ + false), /* pcrel_offset */ + + { 0x10 }, + { 0x11 }, + + /* TOC relative indirect load. */ + HOWTO (0x12, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_TRL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* TOC relative load address. */ + HOWTO (0x13, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_TRLA", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable relative branch. */ + HOWTO (0x14, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RRTBI", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable absolute branch. */ + HOWTO (0x15, /* type */ + 1, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 32, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RRTBA", /* name */ + true, /* partial_inplace */ + 0xffffffff, /* src_mask */ + 0xffffffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable call absolute indirect. */ + HOWTO (0x16, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_CAI", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable call relative. */ + HOWTO (0x17, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_REL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable branch absolute. */ + HOWTO (0x18, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RBA", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable branch absolute. */ + HOWTO (0x19, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_RBAC", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable branch relative. */ + HOWTO (0x1a, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 26, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_signed, /* complain_on_overflow */ + 0, /* special_function */ + "R_REL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false), /* pcrel_offset */ + + /* Modifiable branch absolute. */ + HOWTO (0x1b, /* type */ + 0, /* rightshift */ + 2, /* size (0 = byte, 1 = short, 2 = long) */ + 16, /* bitsize */ + false, /* pc_relative */ + 0, /* bitpos */ + complain_overflow_bitfield, /* complain_on_overflow */ + 0, /* special_function */ + "R_REL", /* name */ + true, /* partial_inplace */ + 0xffff, /* src_mask */ + 0xffff, /* dst_mask */ + false) /* pcrel_offset */ +}; + +#define HOWTO_COUNT (sizeof nlm_powerpc_howto_table \ + / sizeof nlm_powerpc_howto_table[0]) + +/* Read a PowerPC NLM reloc. */ + +static boolean +nlm_powerpc_read_reloc (abfd, sym, secp, rel) + bfd *abfd; + nlmNAME(symbol_type) *sym; + asection **secp; + arelent *rel; +{ + struct nlm32_powerpc_external_reloc ext; + bfd_vma l_vaddr; + unsigned long l_symndx; + int l_rtype; + int l_rsecnm; + + /* Read the reloc from the file. */ + if (bfd_read (&ext, sizeof ext, 1, abfd) != sizeof ext) + { + bfd_set_error (bfd_error_system_call); + return false; + } + + /* Swap in the fields. */ + l_vaddr = bfd_h_get_32 (abfd, ext.l_vaddr); + l_symndx = bfd_h_get_32 (abfd, ext.l_symndx); + l_rtype = bfd_h_get_16 (abfd, ext.l_rtype); + l_rsecnm = bfd_h_get_16 (abfd, ext.l_rsecnm); + + /* Work out the arelent fields. */ + if (sym != NULL) + { + /* This is an import. sym_ptr_ptr is filled in by + nlm_canonicalize_reloc. */ + rel->sym_ptr_ptr = NULL; + } + else + { + asection *sec; + + if (l_symndx == 0) + sec = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + else if (l_symndx == 1) + sec = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + else if (l_symndx == 2) + sec = bfd_get_section_by_name (abfd, NLM_UNINITIALIZED_DATA_NAME); + else + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + rel->sym_ptr_ptr = sec->symbol_ptr_ptr; + } + + rel->address = l_vaddr; + rel->addend = 0; + + BFD_ASSERT ((l_rtype & 0xff) < HOWTO_COUNT); + + rel->howto = nlm_powerpc_howto_table + (l_rtype & 0xff); + + BFD_ASSERT (rel->howto->name != NULL + && ((l_rtype & 0x8000) != 0 + ? (rel->howto->complain_on_overflow + == complain_overflow_signed) + : (rel->howto->complain_on_overflow + == complain_overflow_bitfield)) + && ((l_rtype >> 8) & 0x1f) == rel->howto->bitsize - 1); + + if (l_rsecnm == 0) + *secp = bfd_get_section_by_name (abfd, NLM_CODE_NAME); + else if (l_rsecnm == 1) + *secp = bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME); + else + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + return true; +} + +/* Mangle PowerPC NLM relocs for output. */ + +static boolean +nlm_powerpc_mangle_relocs (abfd, sec, data, offset, count) + bfd *abfd; + asection *sec; + PTR data; + bfd_vma offset; + bfd_size_type count; +{ + return true; +} + +/* Read a PowerPC NLM import record */ + +static boolean +nlm_powerpc_read_import (abfd, sym) + bfd *abfd; + nlmNAME(symbol_type) *sym; +{ + struct nlm_relent *nlm_relocs; /* relocation records for symbol */ + bfd_size_type rcount; /* number of relocs */ + bfd_byte temp[NLM_TARGET_LONG_SIZE]; /* temporary 32-bit value */ + unsigned char symlength; /* length of symbol name */ + + if (bfd_read ((PTR) &symlength, sizeof (symlength), 1, abfd) + != sizeof (symlength)) + { + bfd_set_error (bfd_error_system_call); + return (false); + } + sym -> symbol.the_bfd = abfd; + sym -> symbol.name = bfd_alloc (abfd, symlength + 1); + if (bfd_read ((PTR) sym -> symbol.name, symlength, 1, abfd) + != symlength) + { + bfd_set_error (bfd_error_system_call); + return (false); + } + sym -> symbol.flags = 0; + sym -> symbol.value = 0; + sym -> symbol.section = &bfd_und_section; + if (bfd_read ((PTR) temp, sizeof (temp), 1, abfd) != sizeof (temp)) + { + bfd_set_error (bfd_error_system_call); + return (false); + } + rcount = bfd_h_get_32 (abfd, temp); + nlm_relocs = ((struct nlm_relent *) + bfd_alloc (abfd, rcount * sizeof (struct nlm_relent))); + if (nlm_relocs == (struct nlm_relent *) NULL) + { + bfd_set_error (bfd_error_no_memory); + return false; + } + sym -> relocs = nlm_relocs; + sym -> rcnt = 0; + while (sym -> rcnt < rcount) + { + asection *section; + + if (nlm_powerpc_read_reloc (abfd, sym, §ion, + &nlm_relocs -> reloc) + == false) + return false; + nlm_relocs -> section = section; + nlm_relocs++; + sym -> rcnt++; + } + return true; +} + +/* Write a PowerPC NLM reloc. */ + +static boolean +nlm_powerpc_write_import (abfd, sec, rel) + bfd *abfd; + asection *sec; + arelent *rel; +{ + struct nlm32_powerpc_external_reloc ext; + asymbol *sym; + asection *symsec; + unsigned long l_symndx; + int l_rtype; + int l_rsecnm; + const reloc_howto_type *howto; + + bfd_h_put_32 (abfd, rel->address, ext.l_vaddr); + + sym = *rel->sym_ptr_ptr; + symsec = bfd_get_section (sym); + if (symsec == &bfd_und_section) + l_symndx = 0; + else if (symsec == bfd_get_section_by_name (abfd, NLM_CODE_NAME)) + l_symndx = 0; + else if (symsec == bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME)) + l_symndx = 1; + else if (symsec == bfd_get_section_by_name (abfd, + NLM_UNINITIALIZED_DATA_NAME)) + l_symndx = 2; + else + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + bfd_h_put_32 (abfd, (bfd_vma) l_symndx, ext.l_symndx); + + for (howto = nlm_powerpc_howto_table; + howto < nlm_powerpc_howto_table + HOWTO_COUNT; + howto++) + { + if (howto->rightshift == rel->howto->rightshift + && howto->size == rel->howto->size + && howto->bitsize == rel->howto->bitsize + && howto->pc_relative == rel->howto->pc_relative + && howto->bitpos == rel->howto->bitpos + && howto->partial_inplace == rel->howto->partial_inplace + && howto->src_mask == rel->howto->src_mask + && howto->dst_mask == rel->howto->dst_mask + && howto->pcrel_offset == rel->howto->pcrel_offset) + break; + } + if (howto >= nlm_powerpc_howto_table + HOWTO_COUNT) + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + l_rtype = howto->type; + if (howto->complain_on_overflow == complain_overflow_signed) + l_rtype |= 0x8000; + l_rtype |= (howto->bitsize - 1) << 8; + bfd_h_put_16 (abfd, (bfd_vma) l_rtype, ext.l_rtype); + + if (sec == bfd_get_section_by_name (abfd, NLM_CODE_NAME)) + l_rsecnm = 0; + else if (sec == bfd_get_section_by_name (abfd, NLM_INITIALIZED_DATA_NAME)) + l_rsecnm = 1; + else + { + bfd_set_error (bfd_error_bad_value); + return false; + } + + bfd_h_put_16 (abfd, (bfd_vma) l_rsecnm, ext.l_rsecnm); + + if (bfd_write (&ext, sizeof ext, 1, abfd) != sizeof ext) + return false; + + return true; +} + +/* Write a PowerPC NLM external symbol. */ + +static boolean +nlm_powerpc_write_external (abfd, count, sym, relocs) + bfd *abfd; + bfd_size_type count; + asymbol *sym; + struct reloc_and_sec *relocs; +{ + int i; + bfd_byte len; + unsigned char temp[NLM_TARGET_LONG_SIZE]; + + len = strlen (sym->name); + if ((bfd_write (&len, sizeof (bfd_byte), 1, abfd) != sizeof(bfd_byte)) + || bfd_write (sym->name, len, 1, abfd) != len) + { + bfd_set_error (bfd_error_system_call); + return false; + } + + bfd_put_32 (abfd, count, temp); + if (bfd_write (temp, sizeof(temp), 1, abfd) != sizeof (temp)) + { + bfd_set_error (bfd_error_system_call); + return false; + } + + for (i = 0; i < count; i++) + { + if (nlm_powerpc_write_import (abfd, relocs[i].sec, + relocs[i].rel) == false) + return false; + } + + return true; +} + +#include "nlmswap.h" + +static const struct nlm_backend_data nlm32_powerpc_backend = +{ + "NetWare PowerPC Module \032", + sizeof (Nlm32_powerpc_External_Fixed_Header), + sizeof (struct nlm32_powerpc_external_prefix_header), + bfd_arch_powerpc, + 0, + false, + nlm_powerpc_backend_object_p, + nlm_powerpc_write_prefix, + nlm_powerpc_read_reloc, + nlm_powerpc_mangle_relocs, + nlm_powerpc_read_import, + nlm_powerpc_write_import, + 0, /* set_public_section */ + 0, /* get_public_offset */ + nlm_swap_fixed_header_in, + nlm_swap_fixed_header_out, + nlm_powerpc_write_external, + 0, /* write_export */ +}; + +#define TARGET_BIG_NAME "nlm32-powerpc" +#define TARGET_BIG_SYM nlmNAME(powerpc_vec) +#define TARGET_BACKEND_DATA &nlm32_powerpc_backend + +#include "nlm-target.h" -- 2.30.2