#include "bfd.h"
#include "sysdep.h"
+#include "bfdlink.h"
#include "libbfd.h"
#include "obstack.h"
-#include "bfdlink.h"
#include "libelf.h"
-/* Note there isn't much error handling code in here yet. Unexpected
- conditions are handled by just calling abort. FIXME damnit! */
-
-/* ELF32/HPPA relocation support
- This file contains ELF32/HPPA relocation support as specified
- in the Stratus FTX/Golf Object File Format (SED-1762) dated
- November 19, 1992. */
+/* HPPA symbol table extension entry types */
+enum elf32_hppa_symextn_types
+{
+ PARISC_SXT_NULL,
+ PARISC_SXT_SYMNDX,
+ PARISC_SXT_ARG_RELOC,
+};
-#include "elf32-hppa.h"
-#include "aout/aout64.h"
-#include "hppa_stubs.h"
+/* These macros compose and decompose the value of a symextn entry:
-/* The basic stub types supported. If/when shared libraries are
- implemented some form of IMPORT and EXPORT stubs will be needed. */
-typedef enum
+ entry_type = ELF32_PARISC_SX_TYPE(word);
+ entry_value = ELF32_PARISC_SX_VAL(word);
+ word = ELF32_PARISC_SX_WORD(type,val); */
+
+#define ELF32_PARISC_SX_TYPE(p) ((p) >> 24)
+#define ELF32_PARISC_SX_VAL(p) ((p) & 0xFFFFFF)
+#define ELF32_PARISC_SX_WORD(type,val) (((type) << 24) + (val & 0xFFFFFF))
+
+/* The following was added facilitate implementation of the .hppa_symextn
+ section. This section is built after the symbol table is built in the
+ elf_write_object_contents routine (called from bfd_close). It is built
+ so late because it requires information that is not known until
+ the symbol and string table sections have been allocated, and
+ the symbol table has been built. */
+
+#define SYMEXTN_SECTION_NAME ".PARISC.symext"
+
+/* FIXME. Are these external? (For example used by GAS?). If so the
+ names need to change to avoid namespace pollution, if not they should
+ be moved into elf32-hppa.c. */
+typedef unsigned long symext_entryS;
+struct symext_chain
+ {
+ symext_entryS entry;
+ struct symext_chain *next;
+ };
+
+typedef struct symext_chain symext_chainS;
+
+/* We use three different hash tables to hold information for
+ linking PA ELF objects.
+
+ The first is the elf32_hppa_link_hash_table which is derived
+ from the standard ELF linker hash table. We use this as a place to
+ attach other hash tables and static information.
+
+ The second is the stub hash table which is derived from the
+ base BFD hash table. The stub hash table holds the information
+ necessary to build the linker stubs during a link.
+
+ The last hash table keeps track of argument location information needed
+ to build hash tables. Each function with nonzero argument location
+ bits will have an entry in this table. */
+
+/* Hash table for linker stubs. */
+
+struct elf32_hppa_stub_hash_entry
+{
+ /* Base hash table entry structure, we can get the name of the stub
+ (and thus know exactly what actions it performs) from the base
+ hash table entry. */
+ struct bfd_hash_entry root;
+
+ /* Offset of the beginning of this stub. */
+ bfd_vma offset;
+
+ /* Given the symbol's value and its section we can determine its final
+ value when building the stubs (so the stub knows where to jump. */
+ symvalue target_value;
+ asection *target_section;
+};
+
+struct elf32_hppa_stub_hash_table
+{
+ /* The hash table itself. */
+ struct bfd_hash_table root;
+
+ /* The stub BFD. */
+ bfd *stub_bfd;
+
+ /* Where to place the next stub. */
+ bfd_byte *location;
+
+ /* Current offset in the stub section. */
+ unsigned int offset;
+
+};
+
+/* Hash table for argument location information. */
+
+struct elf32_hppa_args_hash_entry
{
- HPPA_STUB_ILLEGAL,
- HPPA_STUB_ARG_RELOC,
- HPPA_STUB_LONG_CALL,
-} hppa_stub_type;
+ /* Base hash table entry structure. */
+ struct bfd_hash_entry root;
+
+ /* The argument location bits for this entry. */
+ int arg_bits;
+};
-/* This is a list of all the stubs for a particular BFD. */
+struct elf32_hppa_args_hash_table
+{
+ /* The hash table itself. */
+ struct bfd_hash_table root;
+};
-typedef struct elf32_hppa_stub_name_list_struct
+struct elf32_hppa_link_hash_entry
{
- /* The symbol associated with this stub. */
- asymbol *sym;
- /* Pointer to chain of all stub chains. */
- struct elf32_hppa_stub_description_struct *stub_desc;
- /* Pointer to the stub contents (eg instructions). */
- int *stub_secp;
- /* Size of this stub? (in what units? FIXME). */
- unsigned size;
- /* Pointer to the next stub entry in the chain. */
- struct elf32_hppa_stub_name_list_struct *next;
-} elf32_hppa_stub_name_list;
-
-/* This is a linked list in which each entry describes all the
- linker stubs for a particular bfd. */
-
-typedef struct elf32_hppa_stub_description_struct
+ struct elf_link_hash_entry root;
+};
+
+struct elf32_hppa_link_hash_table
{
- /* The next group of stubs. */
- struct elf32_hppa_stub_description_struct *next;
- /* Used to identify this group of stubs as belonging
- to a particular bfd. */
- bfd *this_bfd;
- /* FIXME: The stub section for this group of stubs? Is
- this redundant with stub_listP->sym->section? */
- asection *stub_sec;
- /* FIXME: what the hell is this? */
- unsigned relocs_allocated_cnt;
- /* The current real size of the stubs (in bytes?). */
- unsigned real_size;
- /* How much space we have allocated for stubs (in bytes?). */
- unsigned allocated_size;
- /* Pointer to the first available space for new stubs. */
- int *stub_secp;
- /* Pointer to the beginning of the stubs. FIXME: Why an int *
- above and a char * here? */
- char *stub_contents;
- /* The list of stubs for this bfd. */
- elf32_hppa_stub_name_list *stub_listP;
- /* I guess we just carry this around for fun. */
- struct bfd_link_info *link_info;
-} elf32_hppa_stub_description;
+ /* The main hash table. */
+ struct elf_link_hash_table root;
+
+ /* The stub hash table. */
+ struct elf32_hppa_stub_hash_table *stub_hash_table;
+
+ /* The argument relocation bits hash table. */
+ struct elf32_hppa_args_hash_table *args_hash_table;
+
+ /* A count of the number of output symbols. */
+ unsigned int output_symbol_count;
+
+ /* Stuff so we can handle DP relative relocations. */
+ long global_value;
+ int global_sym_defined;
+};
+
+typedef unsigned int symextn_entry;
/* FIXME. */
#define ARGUMENTS 0
#define RETURN_VALUE 1
-/* The various argument relocations that may be performed.
- Note GRX,GRY really means ARGX,ARGY. */
+/* The various argument relocations that may be performed. */
typedef enum
{
/* No relocation. */
- NO_ARG_RELOC,
- /* Relocate 32 bits from general to FP register. */
- R_TO_FR,
- /* Relocate 64 bits from arg0,arg1 to FParg1. */
- R01_TO_FR,
- /* Relocate 64 bits from arg2,arg3 to FParg3. */
- R23_TO_FR,
- /* Relocate 32 bits from FP to general register. */
- FR_TO_R,
- /* Relocate 64 bits from FParg1 to arg0,arg1. */
- FR_TO_R01,
- /* Relocate 64 bits from FParg3 to arg2,arg3. */
- FR_TO_R23,
- /* Death. */
- ARG_RELOC_ERR,
+ NO,
+ /* Relocate 32 bits from GR to FP register. */
+ GF,
+ /* Relocate 64 bits from a GR pair to FP pair. */
+ GD,
+ /* Relocate 32 bits from FP to GR. */
+ FG,
+ /* Relocate 64 bits from FP pair to GR pair. */
+ DG,
} arg_reloc_type;
-/* Where (what register type) is an argument comming from? */
-typedef enum
-{
- /* Not in a register. */
- AR_NO,
- /* In a general argument register. */
- AR_GR,
- /* In right half of a FP argument register. */
- AR_FR,
- /* In upper (left) half of a FP argument register. */
- AR_FU,
- /* In general argument register pair 0 (arg0, arg1). */
- AR_DBL01,
- /* In general argument register pair 1 (arg2, arg3). */
- AR_DBL23,
-} arg_location;
-
/* What is being relocated (eg which argument or the return value). */
typedef enum
{
- ARG0, ARG1, ARG2, ARG3, RETVAL,
+ ARG0, ARG1, ARG2, ARG3, RET,
} arg_reloc_location;
-/* Horizontal represents callee's argument location information, vertical
- represents caller's argument location information. Value at a particular
- X, Y location represents what (if any) argument relocation needs to
- be performed to make caller and callee agree. */
-static CONST arg_reloc_type mismatches[6][6] =
-{
- {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC,
- NO_ARG_RELOC, NO_ARG_RELOC},
- {NO_ARG_RELOC, NO_ARG_RELOC, R_TO_FR, ARG_RELOC_ERR,
- R01_TO_FR, ARG_RELOC_ERR},
- {NO_ARG_RELOC, FR_TO_R, NO_ARG_RELOC, ARG_RELOC_ERR,
- ARG_RELOC_ERR, ARG_RELOC_ERR},
- {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
- ARG_RELOC_ERR, ARG_RELOC_ERR},
- {NO_ARG_RELOC, FR_TO_R01, NO_ARG_RELOC, ARG_RELOC_ERR,
- NO_ARG_RELOC, ARG_RELOC_ERR},
- {NO_ARG_RELOC, FR_TO_R23, NO_ARG_RELOC, ARG_RELOC_ERR,
- ARG_RELOC_ERR, NO_ARG_RELOC},
-};
-/* Likewise for the return value. */
-static CONST arg_reloc_type retval_mismatches[6][6] =
-{
- {NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC, NO_ARG_RELOC,
- NO_ARG_RELOC, NO_ARG_RELOC},
- {NO_ARG_RELOC, NO_ARG_RELOC, FR_TO_R, ARG_RELOC_ERR,
- FR_TO_R01, ARG_RELOC_ERR},
- {NO_ARG_RELOC, R_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
- ARG_RELOC_ERR, ARG_RELOC_ERR},
- {ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR, ARG_RELOC_ERR,
- ARG_RELOC_ERR, ARG_RELOC_ERR},
- {NO_ARG_RELOC, R01_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
- NO_ARG_RELOC, ARG_RELOC_ERR},
- {NO_ARG_RELOC, R23_TO_FR, NO_ARG_RELOC, ARG_RELOC_ERR,
- ARG_RELOC_ERR, NO_ARG_RELOC},
-};
+/* ELF32/HPPA relocation support
-/* Used for index mapping in symbol-extension sections. */
-struct elf32_hppa_symextn_map_struct
-{
- int old_index;
- bfd *bfd;
- asymbol *sym;
- int new_index;
-};
+ This file contains ELF32/HPPA relocation support as specified
+ in the Stratus FTX/Golf Object File Format (SED-1762) dated
+ February 1994. */
+
+#include "elf32-hppa.h"
+#include "hppa_stubs.h"
static bfd_reloc_status_type hppa_elf_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-static unsigned long hppa_elf_relocate_insn
+static unsigned long hppa_elf_relocate_insn
PARAMS ((bfd *, asection *, unsigned long, unsigned long, long,
long, unsigned long, unsigned long, unsigned long));
-static long get_symbol_value PARAMS ((asymbol *));
-
static bfd_reloc_status_type hppa_elf_reloc
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd*, char **));
static CONST reloc_howto_type * elf_hppa_reloc_type_lookup
PARAMS ((bfd *, bfd_reloc_code_real_type));
-static symext_entryS elf32_hppa_get_sym_extn PARAMS ((bfd *, asymbol *, int));
-
-static elf32_hppa_stub_description * find_stubs PARAMS ((bfd *, asection *));
-
-static elf32_hppa_stub_description * new_stub
- PARAMS ((bfd *, asection *, struct bfd_link_info *));
-
-static arg_reloc_type type_of_mismatch PARAMS ((int, int, int));
+static boolean elf32_hppa_set_section_contents
+ PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
-static elf32_hppa_stub_name_list * find_stub_by_name
- PARAMS ((bfd *, asection *, char *));
+static void elf_info_to_howto
+ PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
-static elf32_hppa_stub_name_list * add_stub_by_name
- PARAMS ((bfd *, asection *, asymbol *, struct bfd_link_info *));
+static boolean elf32_hppa_backend_symbol_table_processing
+ PARAMS ((bfd *, elf_symbol_type *, int));
-static void hppa_elf_stub_finish PARAMS ((bfd *));
+static void elf32_hppa_backend_begin_write_processing
+ PARAMS ((bfd *, struct bfd_link_info *));
-static void hppa_elf_stub_reloc
- PARAMS ((elf32_hppa_stub_description *, bfd *, asymbol **, int,
- elf32_hppa_reloc_type));
+static void elf32_hppa_backend_final_write_processing
+ PARAMS ((bfd *, boolean));
-static int hppa_elf_arg_reloc_needed_p
- PARAMS ((bfd *, arelent *, arg_reloc_type [5], symext_entryS));
+static void add_entry_to_symext_chain
+ PARAMS ((bfd *, unsigned int, unsigned int, symext_chainS **,
+ symext_chainS **));
-static asymbol * hppa_elf_build_linker_stub
- PARAMS ((bfd *, bfd *, struct bfd_link_info *, arelent *,
- arg_reloc_type [5], int, unsigned *, hppa_stub_type));
+static void
+elf_hppa_tc_make_sections PARAMS ((bfd *, symext_chainS *));
-static void hppa_elf_create_stub_sec
- PARAMS ((bfd *, bfd *, asection **, struct bfd_link_info *));
+static boolean hppa_elf_is_local_label PARAMS ((bfd *, asymbol *));
-static int hppa_elf_long_branch_needed_p
- PARAMS ((bfd *, asection *, arelent *, asymbol *, unsigned));
+static boolean elf32_hppa_add_symbol_hook
+ PARAMS ((bfd *, struct bfd_link_info *, const Elf_Internal_Sym *,
+ const char **, flagword *, asection **, bfd_vma *));
-static boolean hppa_elf_set_section_contents
- PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
+static bfd_reloc_status_type elf32_hppa_bfd_final_link_relocate
+ PARAMS ((const reloc_howto_type *, bfd *, bfd *, asection *,
+ bfd_byte *, bfd_vma, bfd_vma, bfd_vma, struct bfd_link_info *,
+ asection *, const char *, int));
-static void elf_info_to_howto
- PARAMS ((bfd *, arelent *, Elf32_Internal_Rela *));
+static struct bfd_link_hash_table *elf32_hppa_link_hash_table_create
+ PARAMS ((bfd *));
-static void elf32_hppa_backend_symbol_processing PARAMS ((bfd *, asymbol *));
+static struct bfd_hash_entry *
+elf32_hppa_stub_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static boolean elf32_hppa_backend_section_processing
- PARAMS ((bfd *, Elf32_Internal_Shdr *));
+static struct bfd_hash_entry *
+elf32_hppa_args_hash_newfunc
+ PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
-static boolean elf32_hppa_backend_symbol_table_processing
- PARAMS ((bfd *, elf_symbol_type *, int));
+static boolean
+elf32_hppa_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
+ bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **,
+ char *));
-static boolean elf32_hppa_backend_section_from_shdr
- PARAMS ((bfd *, Elf32_Internal_Shdr *, char *));
+static boolean
+elf32_hppa_stub_hash_table_init
+ PARAMS ((struct elf32_hppa_stub_hash_table *, bfd *,
+ struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *,
+ struct bfd_hash_table *,
+ const char *))));
-static boolean elf32_hppa_backend_fake_sections
- PARAMS ((bfd *, Elf_Internal_Shdr *, asection *));
+static boolean
+elf32_hppa_build_one_stub PARAMS ((struct bfd_hash_entry *, PTR));
-static boolean elf32_hppa_backend_section_from_bfd_section
- PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *));
+static boolean
+elf32_hppa_read_symext_info
+ PARAMS ((bfd *, Elf_Internal_Shdr *, struct elf32_hppa_args_hash_table *,
+ Elf_Internal_Sym *, boolean, boolean));
-static void elf32_hppa_backend_begin_write_processing PARAMS ((bfd *));
+static unsigned int elf32_hppa_size_of_stub
+ PARAMS ((unsigned int, unsigned int, bfd_vma, bfd_vma, const char *));
-static void elf32_hppa_backend_final_write_processing PARAMS ((bfd *));
+static boolean elf32_hppa_arg_reloc_needed
+ PARAMS ((unsigned int, unsigned int, arg_reloc_type []));
-static void add_entry_to_symext_chain
- PARAMS ((bfd *, elf_symbol_type *, int, symext_chainS **, symext_chainS **));
+static void elf32_hppa_name_of_stub
+ PARAMS ((unsigned int, unsigned int, bfd_vma, bfd_vma, char *));
-static void
-elf_hppa_tc_make_sections PARAMS ((bfd *, symext_chainS *));
+static boolean elf32_hppa_size_symext PARAMS ((struct bfd_hash_entry *, PTR));
-static boolean hppa_elf_is_local_label PARAMS ((bfd *, asymbol *));
+static boolean elf32_hppa_link_output_symbol_hook
+ PARAMS ((bfd *, struct bfd_link_info *, const char *,
+ Elf_Internal_Sym *, asection *));
/* ELF/PA relocation howto entries. */
{R_PARISC_GLOB_DAT, 0, 0, 0, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_PARISC_GLOB_DAT"},
{R_PARISC_JMP_SLOT, 0, 0, 0, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_PARISC_JMP_SLOT"},
{R_PARISC_RELATIVE, 0, 0, 0, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_PARISC_RELATIVE"},
- {R_PARISC_STUB_CALL_17, 0, 0, 17, false, 0, complain_overflow_bitfield, hppa_elf_reloc, "R_PARISC_STUB_CALL_17"},
{R_PARISC_UNIMPLEMENTED, 0, 0, 0, false, 0, complain_overflow_dont, NULL, "R_PARISC_UNIMPLEMENTED"},
};
+/* Where (what register type) is an argument comming from? */
+typedef enum
+{
+ AR_NO,
+ AR_GR,
+ AR_FR,
+ AR_FU,
+ AR_FPDBL1,
+ AR_FPDBL2,
+} arg_location;
+
+/* Horizontal represents the callee's argument location information,
+ vertical represents caller's argument location information. Value at a
+ particular X,Y location represents what (if any) argument relocation
+ needs to be performed to make caller and callee agree. */
+
+static CONST arg_reloc_type arg_mismatches[6][6] =
+{
+ {NO, NO, NO, NO, NO, NO},
+ {NO, NO, GF, NO, GD, NO},
+ {NO, FG, NO, NO, NO, NO},
+ {NO, NO, NO, NO, NO, NO},
+ {NO, DG, NO, NO, NO, NO},
+ {NO, DG, NO, NO, NO, NO},
+};
+
+/* Likewise, but reversed for the return value. */
+static CONST arg_reloc_type ret_mismatches[6][6] =
+{
+ {NO, NO, NO, NO, NO, NO},
+ {NO, NO, FG, NO, DG, NO},
+ {NO, GF, NO, NO, NO, NO},
+ {NO, NO, NO, NO, NO, NO},
+ {NO, GD, NO, NO, NO, NO},
+ {NO, GD, NO, NO, NO, NO},
+};
+
+/* Misc static crud for symbol extension records. */
static symext_chainS *symext_rootP;
static symext_chainS *symext_lastP;
static int symext_chain_size;
-static long global_value;
-static long GOT_value;
-static asymbol *global_symbol;
-static int global_sym_defined;
+
+/* FIXME: We should be able to try this static variable! */
static symext_entryS *symextn_contents;
-static elf32_hppa_stub_description *elf_hppa_stub_rootP;
-static boolean stubs_finished = false;
-static struct elf32_hppa_symextn_map_struct *elf32_hppa_symextn_map;
-static int elf32_hppa_symextn_map_size;
-static char *linker_stubs = NULL;
-static int linker_stubs_size = 0;
-static int linker_stubs_max_size = 0;
-#define STUB_ALLOC_INCR 100
-#define STUB_SYM_BUFFER_INC 5
+
+/* For linker stub hash tables. */
+#define elf32_hppa_stub_hash_lookup(table, string, create, copy) \
+ ((struct elf32_hppa_stub_hash_entry *) \
+ bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
+
+#define elf32_hppa_stub_hash_traverse(table, func, info) \
+ (bfd_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct bfd_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* For linker args hash tables. */
+#define elf32_hppa_args_hash_lookup(table, string, create, copy) \
+ ((struct elf32_hppa_args_hash_entry *) \
+ bfd_hash_lookup (&(table)->root, (string), (create), (copy)))
+
+#define elf32_hppa_args_hash_traverse(table, func, info) \
+ (bfd_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct bfd_hash_entry *, PTR))) (func), \
+ (info)))
+
+#define elf32_hppa_args_hash_table_init(table, newfunc) \
+ (bfd_hash_table_init \
+ (&(table)->root, \
+ (struct bfd_hash_entry *(*) PARAMS ((struct bfd_hash_entry *, \
+ struct bfd_hash_table *, \
+ const char *))) (newfunc)))
+
+/* For HPPA linker hash table. */
+
+#define elf32_hppa_link_hash_lookup(table, string, create, copy, follow)\
+ ((struct elf32_hppa_link_hash_entry *) \
+ elf_link_hash_lookup (&(table)->root, (string), (create), \
+ (copy), (follow)))
+
+#define elf32_hppa_link_hash_traverse(table, func, info) \
+ (elf_link_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* Get the PA ELF linker hash table from a link_info structure. */
+
+#define elf32_hppa_hash_table(p) \
+ ((struct elf32_hppa_link_hash_table *) ((p)->hash))
+
+
+/* Extract specific argument location bits for WHICH from
+ the full argument location in AR. */
+#define EXTRACT_ARBITS(ar, which) ((ar) >> (8 - ((which) * 2))) & 3
+
+/* Assorted hash table functions. */
+
+/* Initialize an entry in the stub hash table. */
+
+static struct bfd_hash_entry *
+elf32_hppa_stub_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct elf32_hppa_stub_hash_entry *ret;
+
+ ret = (struct elf32_hppa_stub_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == NULL)
+ ret = ((struct elf32_hppa_stub_hash_entry *)
+ bfd_hash_allocate (table,
+ sizeof (struct elf32_hppa_stub_hash_entry)));
+ if (ret == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct elf32_hppa_stub_hash_entry *)
+ bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
+
+ if (ret)
+ {
+ /* Initialize the local fields. */
+ ret->offset = 0;
+ ret->target_value = 0;
+ ret->target_section = NULL;
+ }
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Initialize a stub hash table. */
+
+static boolean
+elf32_hppa_stub_hash_table_init (table, stub_bfd, newfunc)
+ struct elf32_hppa_stub_hash_table *table;
+ bfd *stub_bfd;
+ struct bfd_hash_entry *(*newfunc) PARAMS ((struct bfd_hash_entry *,
+ struct bfd_hash_table *,
+ const char *));
+{
+ table->offset = 0;
+ table->location = 0;
+ table->stub_bfd = stub_bfd;
+ return (bfd_hash_table_init (&table->root, newfunc));
+}
+
+/* Initialize an entry in the argument location hash table. */
+
+static struct bfd_hash_entry *
+elf32_hppa_args_hash_newfunc (entry, table, string)
+ struct bfd_hash_entry *entry;
+ struct bfd_hash_table *table;
+ const char *string;
+{
+ struct elf32_hppa_args_hash_entry *ret;
+
+ ret = (struct elf32_hppa_args_hash_entry *) entry;
+
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (ret == NULL)
+ ret = ((struct elf32_hppa_args_hash_entry *)
+ bfd_hash_allocate (table,
+ sizeof (struct elf32_hppa_args_hash_entry)));
+ if (ret == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+
+ /* Call the allocation method of the superclass. */
+ ret = ((struct elf32_hppa_args_hash_entry *)
+ bfd_hash_newfunc ((struct bfd_hash_entry *) ret, table, string));
+
+ /* Initialize the local fields. */
+ if (ret)
+ ret->arg_bits = 0;
+
+ return (struct bfd_hash_entry *) ret;
+}
+
+/* Create the derived linker hash table. The PA ELF port uses the derived
+ hash table to keep information specific to the PA ELF linker (without
+ using static variables). */
+
+static struct bfd_link_hash_table *
+elf32_hppa_link_hash_table_create (abfd)
+ bfd *abfd;
+{
+ struct elf32_hppa_link_hash_table *ret;
+
+ ret = ((struct elf32_hppa_link_hash_table *)
+ bfd_alloc (abfd, sizeof (struct elf32_hppa_link_hash_table)));
+ if (ret == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return NULL;
+ }
+ if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
+ _bfd_elf_link_hash_newfunc))
+ {
+ bfd_release (abfd, ret);
+ return NULL;
+ }
+ ret->stub_hash_table = NULL;
+ ret->args_hash_table = NULL;
+ ret->output_symbol_count = 0;
+ ret->global_value = 0;
+ ret->global_sym_defined = 0;
+
+ return &ret->root.root;
+}
/* Relocate the given INSN given the various input parameters.
{
unsigned char opcode = get_opcode (insn);
long constant_value;
- unsigned arg_reloc;
switch (opcode)
{
case BL:
case BE:
case BLE:
- arg_reloc = HPPA_R_ARG_RELOC (r_addend);
-
/* XXX computing constant_value is not needed??? */
constant_value = assemble_17 ((insn & 0x001f0000) >> 16,
(insn & 0x00001ffc) >> 2,
}
}
-/* Return the relocated value of the given symbol. */
+/* Relocate an HPPA ELF section. */
-static long
-get_symbol_value (symbol)
- asymbol *symbol;
+static boolean
+elf32_hppa_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, local_syms, local_sections,
+ output_names)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ Elf_Internal_Rela *relocs;
+ Elf_Internal_Sym *local_syms;
+ asection **local_sections;
+ char *output_names;
{
- if (symbol == NULL
- || symbol->section == &bfd_com_section)
- return 0;
- else
- return symbol->value + symbol->section->output_section->vma
- + symbol->section->output_offset;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Rela *rel;
+ Elf_Internal_Rela *relend;
+
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+
+ rel = relocs;
+ relend = relocs + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ int r_type;
+ const reloc_howto_type *howto;
+ long r_symndx;
+ struct elf_link_hash_entry *h;
+ Elf_Internal_Sym *sym;
+ asection *sym_sec;
+ bfd_vma relocation;
+ bfd_reloc_status_type r;
+ const char *sym_name;
+
+ r_type = ELF32_R_TYPE (rel->r_info);
+ if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+ howto = elf_hppa_howto_table + r_type;
+
+ r_symndx = ELF32_R_SYM (rel->r_info);
+
+ if (info->relocateable)
+ {
+ /* This is a relocateable link. We don't have to change
+ anything, unless the reloc is against a section symbol,
+ in which case we have to adjust according to where the
+ section symbol winds up in the output section. */
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ if (ELF_ST_TYPE (sym->st_info) == STT_SECTION)
+ {
+ sym_sec = local_sections[r_symndx];
+ rel->r_addend += sym_sec->output_offset;
+ }
+ }
+
+ continue;
+ }
+
+ /* This is a final link. */
+ h = NULL;
+ sym = NULL;
+ sym_sec = NULL;
+ if (r_symndx < symtab_hdr->sh_info)
+ {
+ sym = local_syms + r_symndx;
+ sym_sec = local_sections[r_symndx];
+ relocation = ((ELF_ST_TYPE (sym->st_info) == STT_SECTION
+ ? 0 : sym->st_value)
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ }
+ else
+ {
+ long indx;
+
+ indx = r_symndx - symtab_hdr->sh_info;
+ h = elf_sym_hashes (input_bfd)[indx];
+ if (h->root.type == bfd_link_hash_defined)
+ {
+ sym_sec = h->root.u.def.section;
+ relocation = (h->root.u.def.value
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ }
+ else if (h->root.type == bfd_link_hash_weak)
+ relocation = 0;
+ else
+ {
+ if (!((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd,
+ input_section, rel->r_offset)))
+ return false;
+ relocation = 0;
+ }
+ }
+
+ if (h != NULL)
+ sym_name = h->root.root.string;
+ else
+ {
+ sym_name = output_names + sym->st_name;
+ if (sym_name == NULL)
+ return false;
+ if (*sym_name == '\0')
+ sym_name = bfd_section_name (input_bfd, sym_sec);
+ }
+
+ /* If args_hash_table is NULL, then we have encountered some
+ kind of link error (ex. undefined symbols). Do not try to
+ apply any relocations, continue the loop so we can notify
+ the user of several errors in a single attempted link. */
+ if (elf32_hppa_hash_table (info)->args_hash_table == NULL)
+ continue;
+
+ r = elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd,
+ input_section, contents,
+ rel->r_offset, relocation,
+ rel->r_addend, info, sym_sec,
+ sym_name, h == NULL);
+
+ if (r != bfd_reloc_ok)
+ {
+ switch (r)
+ {
+ case bfd_reloc_dangerous:
+ {
+ /* We use this return value to indicate that we performed
+ a "dangerous" relocation. This doesn't mean we did
+ the wrong thing, it just means there may be some cleanup
+ that needs to be done here.
+
+ In particular we had to swap the last call insn and its
+ delay slot. If the delay slot insn needed a relocation,
+ then we'll need to adjust the next relocation entry's
+ offset to account for the fact that the insn moved.
+
+ This hair wouldn't be necessary if we inserted stubs
+ between procedures and used a "bl" to get to the stub. */
+ if (rel != relend)
+ {
+ Elf_Internal_Rela *next_rel = rel + 1;
+
+ if (rel->r_offset + 4 == next_rel->r_offset)
+ next_rel->r_offset -= 4;
+ }
+ break;
+ }
+ default:
+ case bfd_reloc_outofrange:
+ case bfd_reloc_overflow:
+ {
+ if (!((*info->callbacks->reloc_overflow)
+ (info, sym_name, howto->name, (bfd_vma) 0,
+ input_bfd, input_section, rel->r_offset)))
+ return false;
+ }
+ break;
+ }
+ }
+ }
+
+ return true;
}
/* Return one (or more) BFD relocations which implement the base
/* Allocate slots for the BFD relocation. */
final_types = (elf32_hppa_reloc_type **)
bfd_alloc_by_size_t (abfd, sizeof (elf32_hppa_reloc_type *) * 2);
- BFD_ASSERT (final_types != 0); /* FIXME */
+ if (final_types == NULL)
+ return NULL;
/* Allocate space for the relocation itself. */
finaltype = (elf32_hppa_reloc_type *)
bfd_alloc_by_size_t (abfd, sizeof (elf32_hppa_reloc_type));
- BFD_ASSERT (finaltype != 0); /* FIXME */
+ if (finaltype == NULL)
+ return NULL;
/* Some reasonable defaults. */
final_types[0] = finaltype;
switch (base_type)
{
case R_HPPA:
+ case R_HPPA_ABS_CALL:
switch (format)
{
case 14:
final_type = R_PARISC_PLABEL14R;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_DIR17R;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_PLABEL21L;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_PLABEL32;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_DPREL14F;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_DPREL21L;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_PCREL14F;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_PCREL17F;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
final_type = R_PARISC_PCREL21L;
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
default:
- abort ();
- break;
+ return NULL;
}
break;
default:
- abort ();
- break;
+ return NULL;
}
return final_types;
#undef final_type
+/* Set the contents of a particular section at a particular location. */
-/* Actually perform a relocation. */
-
-static bfd_reloc_status_type
-hppa_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
- error_message)
+static boolean
+elf32_hppa_set_section_contents (abfd, section, location, offset, count)
bfd *abfd;
- arelent *reloc_entry;
- asymbol *symbol_in;
- PTR data;
- asection *input_section;
- bfd *output_bfd;
- char **error_message;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
{
- unsigned long insn;
- long sym_value = 0;
- unsigned long addr = reloc_entry->address;
- bfd_byte *hit_data = addr + (bfd_byte *) data;
- unsigned long r_type = reloc_entry->howto->type;
- unsigned long r_field = e_fsel;
- boolean r_pcrel = reloc_entry->howto->pc_relative;
- unsigned r_format = reloc_entry->howto->bitsize;
- long r_addend = reloc_entry->addend;
-
- /* If only performing a partial link, get out early. */
+ /* Ignore write requests for the symbol extension section until we've
+ had the chance to rebuild it ourselves. */
+ if (!strcmp (section->name, ".PARISC.symextn") && !symext_chain_size)
+ return true;
+ else
+ return bfd_elf32_set_section_contents (abfd, section, location,
+ offset, count);
+}
+
+/* Translate from an elf into field into a howto relocation pointer. */
+
+static void
+elf_info_to_howto (abfd, cache_ptr, dst)
+ bfd *abfd;
+ arelent *cache_ptr;
+ Elf32_Internal_Rela *dst;
+{
+ BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_PARISC_UNIMPLEMENTED);
+ cache_ptr->howto = &elf_hppa_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
+
+
+/* Actually perform a relocation. NOTE this is (mostly) superceeded
+ by elf32_hppa_bfd_final_link_relocate which is called by the new
+ fast linker. */
+
+static bfd_reloc_status_type
+hppa_elf_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
+ error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol_in;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ /* It is no longer valid to call hppa_elf_reloc when creating
+ a final executable. */
if (output_bfd)
{
reloc_entry->address += input_section->output_offset;
reloc_entry->addend += symbol_in->section->output_offset;
return bfd_reloc_ok;
}
+ else
+ {
+ *error_message = (char *) "Unsupported call to hppa_elf_reloc";
+ return bfd_reloc_notsupported;
+ }
+}
- /* If performing final link and the symbol we're relocating against
- is undefined, then return an error. */
- if (symbol_in && symbol_in->section == &bfd_und_section)
- return bfd_reloc_undefined;
+/* Actually perform a relocation as part of a final link. This can get
+ rather hairy when linker stubs are needed. */
- /* Get the final relocated value. */
- sym_value = get_symbol_value (symbol_in);
+static bfd_reloc_status_type
+elf32_hppa_bfd_final_link_relocate (howto, input_bfd, output_bfd,
+ input_section, contents, offset, value,
+ addend, info, sym_sec, sym_name, is_local)
+ const reloc_howto_type *howto;
+ bfd *input_bfd;
+ bfd *output_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ bfd_vma offset;
+ bfd_vma value;
+ bfd_vma addend;
+ struct bfd_link_info *info;
+ asection *sym_sec;
+ const char *sym_name;
+ int is_local;
+{
+ unsigned long insn;
+ unsigned long r_type = howto->type;
+ unsigned long r_format = howto->bitsize;
+ unsigned long r_field = e_fsel;
+ bfd_byte *hit_data = contents + offset + input_section->vma;
+ boolean r_pcrel = howto->pc_relative;
- /* Compute the value of $global$.
- FIXME: None of this should be necessary. $global$ is just a
- marker and shouldn't really figure into these computations.
+ insn = bfd_get_32 (input_bfd, hit_data);
- Once that's fixed we'll need to teach this backend to change
- DP-relative relocations involving symbols in the text section
- to be simple absolute relocations. */
- if (!global_sym_defined)
+ /* Make sure we have a value for $global$. FIXME isn't this effectively
+ just like the gp pointer on MIPS? Can we use those routines for this
+ purpose? */
+ if (!elf32_hppa_hash_table (info)->global_sym_defined)
{
- if (global_symbol)
- {
- global_value = (global_symbol->value
- + global_symbol->section->output_section->vma
- + global_symbol->section->output_offset);
- GOT_value = global_value;
- global_sym_defined++;
- }
- }
+ struct elf_link_hash_entry *h;
+ asection *sec;
+
+ h = elf_link_hash_lookup (elf_hash_table (info), "$global$", false,
+ false, false);
- /* Get the instruction word. */
- insn = bfd_get_32 (abfd, hit_data);
+ /* If there isn't a $global$, then we're in deep trouble. */
+ if (h == NULL)
+ return bfd_reloc_notsupported;
+
+ sec = h->root.u.def.section;
+ elf32_hppa_hash_table (info)->global_value = (h->root.u.def.value
+ + sec->vma
+ + sec->output_offset);
+ elf32_hppa_hash_table (info)->global_sym_defined = 1;
+ }
switch (r_type)
{
case R_PARISC_DIR32:
case R_PARISC_DIR17F:
- case R_PARISC_PCREL17F:
case R_PARISC_PCREL17C:
- case R_PARISC_PLABEL32:
- case R_PARISC_PCREL14F:
r_field = e_fsel;
goto do_basic_type_1;
case R_PARISC_DIR21L:
case R_PARISC_PCREL21L:
- case R_PARISC_PLABEL21L:
r_field = e_lrsel;
goto do_basic_type_1;
case R_PARISC_DIR17R:
case R_PARISC_PCREL17R:
case R_PARISC_DIR14R:
case R_PARISC_PCREL14R:
- case R_PARISC_PLABEL14R:
r_field = e_rrsel;
goto do_basic_type_1;
+ /* For all the DP relative relocations, we need to examine the symbol's
+ section. If it's a code section, then "data pointer relative" makes
+ no sense. In that case we don't adjust the "value", and for 21 bit
+ addil instructions, we change the source addend register from %dp to
+ %r0. */
case R_PARISC_DPREL21L:
r_field = e_lrsel;
- sym_value -= GOT_value;
+ if (sym_sec->flags & SEC_CODE)
+ insn &= ~0x03e00000;
+ else
+ value -= elf32_hppa_hash_table (info)->global_value;
goto do_basic_type_1;
case R_PARISC_DPREL14R:
r_field = e_rrsel;
- sym_value -= GOT_value;
+ if ((sym_sec->flags & SEC_CODE) == 0)
+ value -= elf32_hppa_hash_table (info)->global_value;
goto do_basic_type_1;
case R_PARISC_DPREL14F:
r_field = e_fsel;
- sym_value -= GOT_value;
+ if ((sym_sec->flags & SEC_CODE) == 0)
+ value -= elf32_hppa_hash_table (info)->global_value;
goto do_basic_type_1;
+ /* These cases are separate as they may involve a lot more work
+ to deal with linker stubs. */
+ case R_PARISC_PLABEL32:
+ case R_PARISC_PLABEL21L:
+ case R_PARISC_PLABEL14R:
+ case R_PARISC_PCREL17F:
+ {
+ bfd_vma location;
+ unsigned int len, caller_args, callee_args;
+ arg_reloc_type arg_reloc_types[5];
+ struct elf32_hppa_args_hash_table *args_hash_table;
+ struct elf32_hppa_args_hash_entry *args_hash;
+ char *new_name, *stub_name;
+
+ /* Get the field selector right. We'll need it in a minute. */
+ if (r_type == R_PARISC_PCREL17F
+ || r_type == R_PARISC_PLABEL32)
+ r_field = e_fsel;
+ else if (r_type == R_PARISC_PLABEL21L)
+ r_field = e_lrsel;
+ else if (r_type == R_PARISC_PLABEL14R)
+ r_field = e_rrsel;
+
+ /* Find out where we are and where we're going. */
+ location = (offset +
+ input_section->output_offset +
+ input_section->output_section->vma);
+
+ /* Now look for the argument relocation bits associated with the
+ target. */
+ len = strlen (sym_name) + 1;
+ if (is_local)
+ len += 9;
+ new_name = malloc (len);
+ if (!new_name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return bfd_reloc_notsupported;
+ }
+ strcpy (new_name, sym_name);
-do_basic_type_1:
- insn = hppa_elf_relocate_insn (abfd, input_section, insn, addr,
- sym_value, r_addend, r_format,
- r_field, r_pcrel);
- break;
+ /* Local symbols have unique IDs. */
+ if (is_local)
+ sprintf (new_name + len - 10, "_%08x", (int)sym_sec);
+ args_hash_table = elf32_hppa_hash_table (info)->args_hash_table;
- /* This is a linker internal relocation. */
- case R_PARISC_STUB_CALL_17:
- /* This relocation is for a branch to a long branch stub.
- Change instruction to a BLE,N. It may also be necessary
- to interchange the branch and its delay slot.
- The original instruction stream is
-
- bl <foo>,r ; call foo using register r as
- ; the return pointer
- XXX ; delay slot instruction
-
- The new instruction stream will be:
-
- XXX ; delay slot instruction
- ble <foo_stub> ; call the long call stub for foo
- ; using r31 as the return pointer
-
- This braindamage is necessary because the compiler may put
- an instruction which uses %r31 in the delay slot of the original
- call. By changing the call instruction from a "bl" to a "ble"
- %r31 gets clobbered before the delay slot executes. This
- also means the stub has to play funny games to make sure
- we return to the instruction just after the BLE rather than
- two instructions after the BLE.
-
- We do not interchange the branch and delay slot if the delay
- slot was already nullified, or if the instruction in the delay
- slot modifies the return pointer to avoid an unconditional
- jump after the call returns (GCC optimization).
-
- None of this horseshit would be necessary if we put the
- stubs between functions and just redirected the "bl" to
- the stub. Live and learn. */
-
- /* Is this instruction nullified? (does this ever happen?) */
- if (insn & 2)
- {
- insn = BLE_N_XXX_0_0;
- bfd_put_32 (abfd, insn, hit_data);
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr, sym_value, r_addend,
- r_format, r_field, r_pcrel);
- }
- else
- {
- /* So much for the trivial case... */
- unsigned long old_delay_slot_insn = bfd_get_32 (abfd, hit_data + 4);
- unsigned rtn_reg = (insn & 0x03e00000) >> 21;
+ args_hash = elf32_hppa_args_hash_lookup (args_hash_table,
+ new_name, false, false);
+ if (args_hash == NULL)
+ callee_args = 0;
+ else
+ callee_args = args_hash->arg_bits;
- if (get_opcode (old_delay_slot_insn) == LDO)
- {
- unsigned ldo_src_reg = (old_delay_slot_insn & 0x03e00000) >> 21;
- unsigned ldo_target_reg = (old_delay_slot_insn & 0x001f0000) >> 16;
+ /* If this is a CALL relocation, then get the caller's bits
+ from the addend. Else use the magic 0x155 value for PLABELS.
+
+ Also we don't care about the destination (value) for PLABELS. */
+ if (r_type == R_PARISC_PCREL17F)
+ caller_args = HPPA_R_ARG_RELOC (addend);
+ else
+ {
+ caller_args = 0x155;
+ location = value;
+ }
+
+ /* Any kind of linker stub needed? */
+ if (((int)(value - location) > 0x3ffff)
+ || ((int)(value - location) < (int)0xfffc0000)
+ || elf32_hppa_arg_reloc_needed (caller_args, callee_args,
+ arg_reloc_types))
+ {
+ struct elf32_hppa_stub_hash_table *stub_hash_table;
+ struct elf32_hppa_stub_hash_entry *stub_hash;
+ asection *stub_section;
- /* If the target of the LDO is the same as the return
- register then there is no reordering. We can leave the
- instuction as a non-nullified BLE in this case.
+ /* Build a name for the stub. */
- FIXME: This test looks wrong. If we had a ble using
- ldo_target_reg as the *source* we'd fuck this up. */
- if (ldo_target_reg == rtn_reg)
- {
- unsigned long new_delay_slot_insn = old_delay_slot_insn;
-
- BFD_ASSERT (ldo_src_reg == ldo_target_reg);
- new_delay_slot_insn &= 0xfc00ffff;
- new_delay_slot_insn |= ((31 << 21) | (31 << 16));
- bfd_put_32 (abfd, new_delay_slot_insn, hit_data + 4);
- insn = BLE_XXX_0_0;
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr, sym_value, r_addend,
- r_format, r_field, r_pcrel);
- bfd_put_32 (abfd, insn, hit_data);
- return bfd_reloc_ok;
+ len = strlen (new_name);
+ len += 23;
+ stub_name = malloc (len);
+ if (!stub_name)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return bfd_reloc_notsupported;
+ }
+ elf32_hppa_name_of_stub (caller_args, callee_args,
+ location, value, stub_name);
+ strcat (stub_name, new_name);
+ free (new_name);
+
+ stub_hash_table = elf32_hppa_hash_table (info)->stub_hash_table;
+
+ stub_hash
+ = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name,
+ false, false);
+
+ /* We're done with that name. */
+ free (stub_name);
+
+ /* The stub BFD only has one section. */
+ stub_section = stub_hash_table->stub_bfd->sections;
+
+ if (stub_hash != NULL)
+ {
+
+ if (r_type == R_PARISC_PCREL17F)
+ {
+ unsigned long delay_insn;
+ unsigned int opcode, rtn_reg, ldo_target_reg, ldo_src_reg;
+
+ /* We'll need to peek at the next insn. */
+ delay_insn = bfd_get_32 (input_bfd, hit_data + 4);
+ opcode = get_opcode (delay_insn);
+
+ /* We also need to know the return register for this
+ call. */
+ rtn_reg = (insn & 0x03e00000) >> 21;
+
+ ldo_src_reg = (delay_insn & 0x03e00000) >> 21;
+ ldo_target_reg = (delay_insn & 0x001f0000) >> 16;
+
+ /* Munge up the value and other parameters for
+ hppa_elf_relocate_insn. */
+
+ value = (stub_hash->offset
+ + stub_section->output_offset
+ + stub_section->output_section->vma);
+
+ r_format = 17;
+ r_field = e_fsel;
+ r_pcrel = 0;
+ addend = 0;
+
+ /* We need to peek at the delay insn and determine if
+ we'll need to swap the branch and its delay insn. */
+ if ((insn & 2)
+ || (opcode == LDO
+ && ldo_target_reg == rtn_reg)
+ || (delay_insn == 0x08000240))
+ {
+ /* No need to swap the branch and its delay slot, but
+ we do need to make sure to jump past the return
+ pointer update in the stub. */
+ value += 4;
+
+ /* If the delay insn does a return pointer adjustment,
+ then we have to make sure it stays valid. */
+ if (opcode == LDO
+ && ldo_target_reg == rtn_reg)
+ {
+ delay_insn &= 0xfc00ffff;
+ delay_insn |= ((31 << 21) | (31 << 16));
+ bfd_put_32 (input_bfd, delay_insn, hit_data + 4);
+ }
+ /* Use a BLE to reach the stub. */
+ insn = BLE_SR4_R0;
+ }
+ else
+ {
+ /* Wonderful, we have to swap the call insn and its
+ delay slot. */
+ bfd_put_32 (input_bfd, delay_insn, hit_data);
+ /* Use a BLE,n to reach the stub. */
+ insn = (BLE_SR4_R0 | 0x2);
+ bfd_put_32 (input_bfd, insn, hit_data + 4);
+ insn = hppa_elf_relocate_insn (input_bfd,
+ input_section,
+ insn, offset + 4,
+ value, addend,
+ r_format, r_field,
+ r_pcrel);
+ /* Update the instruction word. */
+ bfd_put_32 (input_bfd, insn, hit_data + 4);
+ return bfd_reloc_dangerous;
+ }
+ }
+ else
+ {
+ /* PLABEL stuff is easy. */
+
+ value = (stub_hash->offset
+ + stub_section->output_offset
+ + stub_section->output_section->vma);
+ /* We don't need the RP adjustment for PLABELs. */
+ value += 4;
+ if (r_type == R_PARISC_PLABEL32)
+ r_format = 32;
+ else if (r_type == R_PARISC_PLABEL21L)
+ r_format = 21;
+ else if (r_type == R_PARISC_PLABEL14R)
+ r_format = 14;
+
+ r_pcrel = 0;
+ addend = 0;
+ }
}
- else if (rtn_reg == 31)
- {
- /* The return register is r31, so this is a millicode
- call. Do not perform any instruction reordering. */
- insn = BLE_XXX_0_0;
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr, sym_value,
- r_addend, r_format,
- r_field, r_pcrel);
- bfd_put_32 (abfd, insn, hit_data);
- return bfd_reloc_ok;
- }
else
- {
- /* Check to see if the delay slot instruction has a
- relocation. If so, we need to change the address
- field of it because the instruction it relocates
- is going to be moved. Oh what a mess. */
- arelent * next_reloc_entry = reloc_entry+1;
-
- if (next_reloc_entry->address == reloc_entry->address + 4)
- next_reloc_entry->address -= 4;
-
- insn = old_delay_slot_insn;
- bfd_put_32 (abfd, insn, hit_data);
- insn = BLE_N_XXX_0_0;
- bfd_put_32 (abfd, insn, hit_data + 4);
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr + 4,
- sym_value, r_addend,
- r_format, r_field, r_pcrel);
- bfd_put_32 (abfd, insn, hit_data + 4);
- return bfd_reloc_ok;
- }
- }
- /* Same comments as above regarding incorrect test. */
- else if (rtn_reg == 31)
- {
- /* The return register is r31, so this is a millicode call.
- Perform no instruction reordering in this case. */
- insn = BLE_XXX_0_0;
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr, sym_value,
- r_addend, r_format,
- r_field, r_pcrel);
- bfd_put_32 (abfd, insn, hit_data);
- return bfd_reloc_ok;
- }
- else
- {
- /* Check to see if the delay slot instruction has a
- relocation. If so, we need to change its address
- field because the instruction it relocates is going
- to be moved. */
- arelent * next_reloc_entry = reloc_entry+1;
-
- if (next_reloc_entry->address == reloc_entry->address + 4)
- next_reloc_entry->address -= 4;
-
- insn = old_delay_slot_insn;
- bfd_put_32 (abfd, insn, hit_data);
- insn = BLE_N_XXX_0_0;
- bfd_put_32 (abfd, insn, hit_data + 4);
- r_type = R_PARISC_DIR17F;
- r_pcrel = 0;
- insn = hppa_elf_relocate_insn (abfd, input_section, insn,
- addr + 4, sym_value,
- r_addend, r_format,
- r_field, r_pcrel);
- bfd_put_32 (abfd, insn, hit_data + 4);
- return bfd_reloc_ok;
- }
- }
+ return bfd_reloc_notsupported;
+ }
+ goto do_basic_type_1;
+ }
+
+do_basic_type_1:
+ insn = hppa_elf_relocate_insn (input_bfd, input_section, insn,
+ offset, value, addend, r_format,
+ r_field, r_pcrel);
break;
-
+
/* Something we don't know how to handle. */
default:
- *error_message = (char *) "Unrecognized reloc";
return bfd_reloc_notsupported;
}
/* Update the instruction word. */
- bfd_put_32 (abfd, insn, hit_data);
+ bfd_put_32 (input_bfd, insn, hit_data);
return (bfd_reloc_ok);
}
section *before* any other output processing happens. */
static void
-elf32_hppa_backend_begin_write_processing (abfd)
+elf32_hppa_backend_begin_write_processing (abfd, info)
bfd *abfd;
+ struct bfd_link_info *info;
{
- int i;
+ unsigned int i;
asection *symextn_sec;
- /* Size up the symbol extension section. We can't built it just
- yet as the elf_symbol_map hasn't been built. */
- if (abfd->outsymbols == NULL || symext_chain_size != 0)
+ /* Size up the symbol extension section. */
+ if ((abfd->outsymbols == NULL
+ && info == NULL)
+ || symext_chain_size != 0)
return;
- /* Look at each symbol, and determine if it will need an entry in
- the symbol extension section. */
- for (i = 0; i < abfd->symcount; i++)
+ if (info == NULL)
{
- elf_symbol_type *symbol = (elf_symbol_type *)abfd->outsymbols[i];
+ /* We were not called from the BFD ELF linker code, so we need
+ to examine the output BFD's outsymbols.
- /* Only functions ever need an entry in the symbol extension
- section. */
- if (!(symbol->symbol.flags & BSF_FUNCTION))
- continue;
+ Note we can not build the symbol extensions now as the symbol
+ map hasn't been set up. */
+ for (i = 0; i < abfd->symcount; i++)
+ {
+ elf_symbol_type *symbol = (elf_symbol_type *)abfd->outsymbols[i];
- /* And only if they specify the locations of their arguments. */
- if (symbol->tc_data.hppa_arg_reloc == 0)
- continue;
+ /* Only functions ever need an entry in the symbol extension
+ section. */
+ if (!(symbol->symbol.flags & BSF_FUNCTION))
+ continue;
+
+ /* And only if they specify the locations of their arguments. */
+ if (symbol->tc_data.hppa_arg_reloc == 0)
+ continue;
+
+ /* Yup. This function symbol needs an entry. */
+ symext_chain_size += 2 * sizeof (symext_entryS);
+ }
+ }
+ else if (info->relocateable == true)
+ {
+ struct elf32_hppa_args_hash_table *table;
+ table = elf32_hppa_hash_table (info)->args_hash_table;
- /* Yup. This function symbol needs an entry. */
- symext_chain_size += 2 * sizeof (symext_entryS);
+ /* Determine the size of the symbol extension section. */
+ elf32_hppa_args_hash_traverse (table,
+ elf32_hppa_size_symext,
+ &symext_chain_size);
}
/* Now create the section and set its size. We'll fill in the
contents later. */
symextn_sec = bfd_get_section_by_name (abfd, SYMEXTN_SECTION_NAME);
if (symextn_sec == NULL)
+ symextn_sec = bfd_make_section (abfd, SYMEXTN_SECTION_NAME);
+
+ bfd_set_section_flags (abfd, symextn_sec,
+ SEC_LOAD | SEC_HAS_CONTENTS | SEC_DATA);
+ symextn_sec->output_section = symextn_sec;
+ symextn_sec->output_offset = 0;
+ bfd_set_section_alignment (abfd, symextn_sec, 2);
+ bfd_set_section_size (abfd, symextn_sec, symext_chain_size);
+}
+
+/* Called for each entry in the args location hash table. For each
+ entry we bump the size pointer by 2 records (16 bytes). */
+
+static boolean
+elf32_hppa_size_symext (gen_entry, in_args)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_args;
+{
+ unsigned int *sizep = (unsigned int *)in_args;
+
+ *sizep += 2 * sizeof (symext_entryS);
+ return true;
+}
+
+/* Backend routine called by the linker for each output symbol.
+
+ For PA ELF we use this opportunity to add an appropriate entry
+ to the symbol extension chain for function symbols. */
+
+static boolean
+elf32_hppa_link_output_symbol_hook (abfd, info, name, sym, section)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ const char *name;
+ Elf_Internal_Sym *sym;
+ asection *section;
+{
+ char *new_name;
+ unsigned int len, index;
+ struct elf32_hppa_args_hash_table *args_hash_table;
+ struct elf32_hppa_args_hash_entry *args_hash;
+
+ /* If the args hash table is NULL, then we've encountered an error
+ of some sorts (for example, an undefined symbol). In that case
+ we've got nothing else to do.
+
+ NOTE: elf_link_output_symbol will abort if we return false here! */
+ if (elf32_hppa_hash_table (info)->args_hash_table == NULL)
+ return true;
+
+ index = elf32_hppa_hash_table (info)->output_symbol_count++;
+
+ /* We need to look up this symbol in the args hash table to see if
+ it has argument relocation bits. */
+ if (ELF_ST_TYPE (sym->st_info) != STT_FUNC)
+ return true;
+
+ /* We know it's a function symbol of some kind. */
+ len = strlen (name) + 1;
+ if (ELF_ST_BIND (sym->st_info) == STB_LOCAL)
+ len += 9;
+
+ new_name = malloc (len);
+ if (new_name == NULL)
{
- symextn_sec = bfd_make_section (abfd, SYMEXTN_SECTION_NAME);
- bfd_set_section_flags (abfd, symextn_sec,
- SEC_LOAD | SEC_HAS_CONTENTS | SEC_DATA);
- symextn_sec->output_section = symextn_sec;
- symextn_sec->output_offset = 0;
- bfd_set_section_alignment (abfd, symextn_sec, 2);
- bfd_set_section_size (abfd, symextn_sec, symext_chain_size);
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
+ strcpy (new_name, name);
+ if (ELF_ST_BIND (sym->st_info) == STB_LOCAL)
+ sprintf (new_name + len - 10, "_%08x", (int)section);
+
+ /* Now that we have the unique name, we can look it up in the
+ args hash table. */
+ args_hash_table = elf32_hppa_hash_table (info)->args_hash_table;
+ args_hash = elf32_hppa_args_hash_lookup (args_hash_table, new_name,
+ false, false);
+ free (new_name);
+ if (args_hash == NULL)
+ return true;
+
+ /* We know this symbol has arg reloc bits. */
+ add_entry_to_symext_chain (abfd, args_hash->arg_bits,
+ index, &symext_rootP, &symext_lastP);
+ return true;
}
/* Perform any processing needed late in the object file writing process.
section. */
static void
-elf32_hppa_backend_final_write_processing (abfd)
+elf32_hppa_backend_final_write_processing (abfd, linker)
bfd *abfd;
+ boolean linker;
{
asection *symextn_sec;
- int i, *symtab_map = (int *) elf_sym_extra (abfd);
+ unsigned int i, *symtab_map = (unsigned int *) elf_sym_extra (abfd);
/* Now build the symbol extension section. */
if (symext_chain_size == 0)
- return;
+ return;
- /* Look at each symbol, adding the appropriate information to the
- symbol extension section list as necessary. */
- for (i = 0; i < abfd->symcount; i++)
+ if (! linker)
{
- elf_symbol_type *symbol = (elf_symbol_type *) abfd->outsymbols[i];
+ /* We were not called from the backend linker, so we still need
+ to build the symbol extension chain.
- /* Only functions ever need an entry in the symbol extension
- section. */
- if (!(symbol->symbol.flags & BSF_FUNCTION))
- continue;
+ Look at each symbol, adding the appropriate information to the
+ symbol extension section list as necessary. */
+ for (i = 0; i < abfd->symcount; i++)
+ {
+ elf_symbol_type *symbol = (elf_symbol_type *) abfd->outsymbols[i];
- /* And only if they specify the locations of their arguments. */
- if (symbol->tc_data.hppa_arg_reloc == 0)
- continue;
+ /* Only functions ever need an entry in the symbol extension
+ section. */
+ if (!(symbol->symbol.flags & BSF_FUNCTION))
+ continue;
+
+ /* And only if they specify the locations of their arguments. */
+ if (symbol->tc_data.hppa_arg_reloc == 0)
+ continue;
- /* Add this symbol's information to the chain. */
- add_entry_to_symext_chain (abfd, symbol, symtab_map[i],
- &symext_rootP, &symext_lastP);
+ /* Add this symbol's information to the chain. */
+ add_entry_to_symext_chain (abfd, symbol->tc_data.hppa_arg_reloc,
+ symtab_map[i], &symext_rootP,
+ &symext_lastP);
+ }
}
- /* Now fill in the contents of the symbol extension chain. */
+ /* Now fill in the contents of the symbol extension section. */
elf_hppa_tc_make_sections (abfd, symext_rootP);
/* And attach that as the section's contents. */
abort();
symextn_sec->contents = (void *)symextn_contents;
-
- bfd_set_section_contents (abfd, symextn_sec, symextn_sec->contents,
+
+ bfd_set_section_contents (abfd, symextn_sec, symextn_sec->contents,
symextn_sec->output_offset, symextn_sec->_raw_size);
}
by SYMBOLP if SYMBOLP is a function symbol. Used internally and by GAS. */
static void
-add_entry_to_symext_chain (abfd, symbol, sym_idx, symext_root, symext_last)
+add_entry_to_symext_chain (abfd, arg_reloc, sym_idx, symext_root, symext_last)
bfd *abfd;
- elf_symbol_type *symbol;
- int sym_idx;
+ unsigned int arg_reloc;
+ unsigned int sym_idx;
symext_chainS **symext_root;
symext_chainS **symext_last;
{
symext_chainS *symextP;
- unsigned int arg_reloc = symbol->tc_data.hppa_arg_reloc;
/* Allocate memory and initialize this entry. */
symextP = (symext_chainS *) bfd_alloc (abfd, sizeof (symext_chainS) * 2);
}
}
-/* Build the symbol extension section. Used internally and by GAS. */
+/* Build the symbol extension section. */
static void
elf_hppa_tc_make_sections (abfd, symext_root)
symext_chainS *symext_root;
{
symext_chainS *symextP;
- int i;
+ unsigned int i;
asection *symextn_sec;
- /* FIXME: Huh? I don't see what this is supposed to do for us. */
- hppa_elf_stub_finish (abfd);
-
symextn_sec = bfd_get_section_by_name (abfd, SYMEXTN_SECTION_NAME);
/* Grab some memory for the contents of the symbol extension section
return;
}
-/* Return the symbol extension record of type TYPE for the symbol SYM. */
+/* Do some PA ELF specific work after reading in the symbol table.
+ In particular attach the argument relocation from the
+ symbol extension section to the appropriate symbols. */
-static symext_entryS
-elf32_hppa_get_sym_extn (abfd, sym, type)
+static boolean
+elf32_hppa_backend_symbol_table_processing (abfd, esyms,symcnt)
bfd *abfd;
- asymbol *sym;
- int type;
+ elf_symbol_type *esyms;
+ int symcnt;
{
- switch (type)
+ Elf32_Internal_Shdr *symextn_hdr =
+ bfd_elf_find_section (abfd, SYMEXTN_SECTION_NAME);
+ unsigned int i, current_sym_idx = 0;
+
+ /* If no symbol extension existed, then all symbol extension information
+ is assumed to be zero. */
+ if (symextn_hdr == NULL)
{
- case PARISC_SXT_SYMNDX:
- case PARISC_SXT_NULL:
- return (symext_entryS) 0;
- case PARISC_SXT_ARG_RELOC:
- {
- elf_symbol_type *esymP = (elf_symbol_type *) sym;
+ for (i = 0; i < symcnt; i++)
+ esyms[i].tc_data.hppa_arg_reloc = 0;
+ return (true);
+ }
- return (symext_entryS) esymP->tc_data.hppa_arg_reloc;
- }
- /* This should never happen. */
- default:
- abort();
+ /* FIXME: Why not use bfd_get_section_contents here? Also should give
+ memory back when we're done. */
+ /* Allocate a buffer of the appropriate size for the symextn section. */
+ symextn_hdr->contents = bfd_zalloc(abfd,symextn_hdr->sh_size);
+ if (!symextn_hdr->contents)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
}
-}
+ symextn_hdr->size = symextn_hdr->sh_size;
-/* Search the chain of stub descriptions and locate the stub
- description for this the given section within the given bfd.
+ /* Read in the symextn section. */
+ if (bfd_seek (abfd, symextn_hdr->sh_offset, SEEK_SET) == -1)
+ return false;
+ if (bfd_read ((PTR) symextn_hdr->contents, 1, symextn_hdr->size, abfd)
+ != symextn_hdr->size)
+ return false;
- FIXME: I see yet another wonderful linear linked list search
- here. This is probably bad. */
+ /* Parse entries in the symbol extension section, updating the symtab
+ entries as we go */
+ for (i = 0; i < symextn_hdr->size / sizeof(symext_entryS); i++)
+ {
+ symext_entryS *seP = ((symext_entryS *)symextn_hdr->contents) + i;
+ unsigned int se_value = ELF32_PARISC_SX_VAL (*seP);
+ unsigned int se_type = ELF32_PARISC_SX_TYPE (*seP);
-static elf32_hppa_stub_description *
-find_stubs (abfd, stub_sec)
- bfd *abfd;
- asection *stub_sec;
-{
- elf32_hppa_stub_description *stubP;
+ switch (se_type)
+ {
+ case PARISC_SXT_NULL:
+ break;
- for (stubP = elf_hppa_stub_rootP; stubP; stubP = stubP->next)
- {
- /* Is this the right one? */
- if (stubP->this_bfd == abfd && stubP->stub_sec == stub_sec)
- return stubP;
+ case PARISC_SXT_SYMNDX:
+ if (se_value >= symcnt)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return (false);
+ }
+ current_sym_idx = se_value - 1;
+ break;
+
+ case PARISC_SXT_ARG_RELOC:
+ esyms[current_sym_idx].tc_data.hppa_arg_reloc = se_value;
+ break;
+
+ default:
+ bfd_set_error (bfd_error_bad_value);
+ return (false);
+ }
}
- return NULL;
+ return (true);
}
-static elf32_hppa_stub_description *
-new_stub (abfd, stub_sec, link_info)
- bfd *abfd;
- asection *stub_sec;
- struct bfd_link_info *link_info;
+/* Read and attach the symbol extension information for the symbols
+ in INPUT_BFD to the argument location hash table. Handle locals
+ if DO_LOCALS is true; likewise for globals when DO_GLOBALS is true. */
+
+static boolean
+elf32_hppa_read_symext_info (input_bfd, symtab_hdr, args_hash_table,
+ local_syms, do_locals, do_globals)
+ bfd *input_bfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf32_hppa_args_hash_table *args_hash_table;
+ Elf_Internal_Sym *local_syms;
+ boolean do_locals;
+ boolean do_globals;
{
- elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
+ asection *symextn_sec;
+ symextn_entry *contents;
+ unsigned int i, n_entries, current_index = 0;
- /* If we found a list for this bfd, then use it. */
- if (stub)
- return stub;
+ /* Get the symbol extension section for this BFD. If no section exists
+ then there's nothing to do. Likewise if the section exists, but
+ has no contents. */
+ symextn_sec = bfd_get_section_by_name (input_bfd, SYMEXTN_SECTION_NAME);
+ if (symextn_sec == NULL)
+ return true;
- /* Nope, allocate and initialize a new entry in the stub list chain. */
- stub = (elf32_hppa_stub_description *)
- bfd_zalloc (abfd, sizeof (elf32_hppa_stub_description));
- if (stub)
+ /* Done separately so we can turn off SEC_HAS_CONTENTS (see below). */
+ if (symextn_sec->_raw_size == 0)
{
- stub->this_bfd = abfd;
- stub->stub_sec = stub_sec;
- stub->real_size = 0;
- stub->allocated_size = 0;
- stub->stub_contents = NULL;
- stub->stub_secp = NULL;
- stub->link_info = link_info;
-
- stub->next = elf_hppa_stub_rootP;
- elf_hppa_stub_rootP = stub;
+ symextn_sec->flags &= ~SEC_HAS_CONTENTS;
+ return true;
}
- else
+
+ contents = (symextn_entry *) malloc (symextn_sec->_raw_size);
+ if (contents == NULL)
{
bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
+ return false;
}
- return stub;
-}
-
-/* Try and locate a stub with the name NAME within the stubs
- associated with ABFD. More linked list searches. */
-
-static elf32_hppa_stub_name_list *
-find_stub_by_name (abfd, stub_sec, name)
- bfd *abfd;
- asection *stub_sec;
- char *name;
-{
- /* Find the stubs associated with this bfd. */
- elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
-
- /* If found, then we have to walk down them looking for a match. */
- if (stub)
+ /* How gross. We turn off SEC_HAS_CONTENTS for the input symbol extension
+ sections to keep the generic ELF/BFD code from trying to do anything
+ with them. We have to undo that hack temporarily so that we can read
+ in the contents with the generic code. */
+ symextn_sec->flags |= SEC_HAS_CONTENTS;
+ if (bfd_get_section_contents (input_bfd, symextn_sec, contents,
+ 0, symextn_sec->_raw_size) == false)
{
- elf32_hppa_stub_name_list *name_listP;
-
- for (name_listP = stub->stub_listP;
- name_listP;
- name_listP = name_listP->next)
- {
- if (!strcmp (name_listP->sym->name, name))
- return name_listP;
- }
+ symextn_sec->flags &= ~SEC_HAS_CONTENTS;
+ free (contents);
+ return false;
}
- /* Not found. */
- return 0;
-}
-
-/* Add a new stub (SYM) to the list of stubs associated with the given BFD. */
-static elf32_hppa_stub_name_list *
-add_stub_by_name(abfd, stub_sec, sym, link_info)
- bfd *abfd;
- asection *stub_sec;
- asymbol *sym;
- struct bfd_link_info *link_info;
-{
- elf32_hppa_stub_description *stub = find_stubs (abfd, stub_sec);
- elf32_hppa_stub_name_list *stub_entry;
-
- /* If no stubs are associated with this bfd, then we have to make
- a chain-of-stubs associated with this bfd. */
- if (!stub)
- stub = new_stub (abfd, stub_sec, link_info);
+ /* Gross. Turn off SEC_HAS_CONTENTS for the input symbol extension
+ sections (see above). */
+ symextn_sec->flags &= ~SEC_HAS_CONTENTS;
- if (stub)
+ n_entries = symextn_sec->_raw_size / sizeof (symextn_entry);
+ for (i = 0; i < n_entries; i++)
{
- /* Allocate and initialize an entry in the stub chain. */
- stub_entry = (elf32_hppa_stub_name_list *)
- bfd_zalloc (abfd, sizeof (elf32_hppa_stub_name_list));
+ symextn_entry entry = contents[i];
+ unsigned int value = ELF32_PARISC_SX_VAL (entry);
+ unsigned int type = ELF32_PARISC_SX_TYPE (entry);
+ struct elf32_hppa_args_hash_entry *args_hash;
- if (stub_entry)
- {
- stub_entry->size = 0;
- stub_entry->sym = sym;
- stub_entry->stub_desc = stub;
- /* First byte of this stub is the pointer to
- the next available location in the stub buffer. */
- stub_entry->stub_secp = stub->stub_secp;
- /* Add it to the chain. */
- if (stub->stub_listP)
- stub_entry->next = stub->stub_listP;
- else
- stub_entry->next = NULL;
- stub->stub_listP = stub_entry;
- return stub_entry;
- }
- else
+ switch (type)
{
- bfd_set_error (bfd_error_no_memory);
- abort(); /* FIXME */
- }
- }
- /* Death by mis-adventure. */
- abort ();
- return (elf32_hppa_stub_name_list *)NULL;
-}
+ case PARISC_SXT_NULL:
+ break;
-/* For the given caller/callee argument location information and the
- type of relocation (arguments or return value), return the type
- of argument relocation needed to make caller and callee happy. */
-
-static arg_reloc_type
-type_of_mismatch (caller_bits, callee_bits, type)
- int caller_bits;
- int callee_bits;
- int type;
-{
- switch (type)
- {
- case ARGUMENTS:
- return mismatches[caller_bits][callee_bits];
- case RETURN_VALUE:
- return retval_mismatches[caller_bits][callee_bits];
- }
- return ARG_RELOC_ERR;
-}
-
-/* Extract specific argument location bits for WHICH from the
- the full argument location information in AR. */
-#define EXTRACT_ARBITS(ar, which) ((ar) >> (8 - ((which) * 2))) & 3
-
-/* Add the new instruction INSN into the stub area denoted by ENTRY.
- FIXME: Looks like more cases where we assume sizeof (int) ==
- sizeof (insn) which may not be true if building cross tools. */
-#define NEW_INSTRUCTION(entry, insn) \
-{ \
- *((entry)->stub_desc->stub_secp)++ = (insn); \
- (entry)->stub_desc->real_size += sizeof (int); \
- (entry)->size += sizeof(int); \
- bfd_set_section_size((entry)->stub_desc->this_bfd, \
- (entry)->stub_desc->stub_sec, \
- (entry)->stub_desc->real_size); \
-}
-
-/* Find the offset of the current stub? Looks more like it
- finds the offset of the last instruction to me. */
-#define CURRENT_STUB_OFFSET(entry) \
- ((char *)(entry)->stub_desc->stub_secp \
- - (char *)(entry)->stub_desc->stub_contents - 4)
-
-/* All the stubs have already been built, finish up stub stuff
- by applying relocations to the stubs. */
-
-static void
-hppa_elf_stub_finish (output_bfd)
- bfd *output_bfd;
-{
- elf32_hppa_stub_description *stub_list = elf_hppa_stub_rootP;
-
- /* If the stubs have been finished, then we're already done. */
- if (stubs_finished)
- return;
-
- /* Walk down the list of stub lists. */
- for (; stub_list; stub_list = stub_list->next)
- {
- /* If this list has stubs, then do something. */
- if (stub_list->real_size)
- {
- bfd *stub_bfd = stub_list->this_bfd;
- asection *stub_sec = bfd_get_section_by_name (stub_bfd,
- ".PARISC.stubs");
- long reloc_size;
- arelent **reloc_vector;
- long reloc_count;
-
- /* Some sanity checking. */
- BFD_ASSERT (stub_sec == stub_list->stub_sec);
- BFD_ASSERT (stub_sec);
-
- /* For stub sections raw_size == cooked_size. Also update
- reloc_done as we're handling the relocs now. */
- stub_sec->_cooked_size = stub_sec->_raw_size;
- stub_sec->reloc_done = true;
-
- /* Make space to hold the relocations for the stub section. */
- reloc_size = bfd_get_reloc_upper_bound (stub_bfd, stub_sec);
- if (reloc_size < 0)
- {
- /* FIXME: Should return an error. */
- abort ();
- }
- reloc_vector = (arelent **) malloc (reloc_size);
- if (reloc_vector == NULL && reloc_size != 0)
+ case PARISC_SXT_SYMNDX:
+ if (value >= symtab_hdr->sh_size / sizeof (Elf32_External_Sym))
{
- /* FIXME: should be returning an error so the caller can
- clean up */
- abort ();
+ bfd_set_error (bfd_error_bad_value);
+ free (contents);
+ return false;
}
+ current_index = value;
+ break;
- /* If we have relocations, do them. */
- reloc_count = bfd_canonicalize_reloc (stub_bfd, stub_sec,
- reloc_vector,
- output_bfd->outsymbols);
- if (reloc_count < 0)
+ case PARISC_SXT_ARG_RELOC:
+ if (current_index < symtab_hdr->sh_info
+ && do_locals)
{
- /* FIXME: Should return an error. */
- abort ();
+ Elf_Internal_Shdr *hdr;
+ char *new_name;
+ const char *sym_name;
+ asection *sym_sec;
+ unsigned int len;
+
+ hdr = elf_elfsections (input_bfd)[local_syms[current_index].st_shndx];
+ sym_sec = hdr->bfd_section;
+ sym_name = elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ local_syms[current_index].st_name);
+ len = strlen (sym_name) + 10;
+ new_name = malloc (len);
+ if (new_name == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ free (contents);
+ return false;
+ }
+ strcpy (new_name, sym_name);
+ sprintf (new_name + len - 10, "_%08x", (int)sym_sec);
+
+ /* This is a global symbol with argument location info.
+ We need to enter it into the hash table. */
+ args_hash = elf32_hppa_args_hash_lookup (args_hash_table,
+ new_name, true,
+ true);
+ free (new_name);
+ if (args_hash == NULL)
+ {
+ free (contents);
+ return false;
+ }
+ args_hash->arg_bits = value;
+ break;
}
- if (reloc_count > 0)
+ else if (current_index >= symtab_hdr->sh_info
+ && do_globals)
{
- arelent **parent;
- for (parent = reloc_vector; *parent != NULL; parent++)
+ struct elf_link_hash_entry *h;
+
+ current_index -= symtab_hdr->sh_info;
+ h = elf_sym_hashes(input_bfd)[current_index];
+ /* This is a global symbol with argument location
+ information. We need to enter it into the hash table. */
+ args_hash = elf32_hppa_args_hash_lookup (args_hash_table,
+ h->root.root.string,
+ true, true);
+ if (args_hash == NULL)
{
- char *err = NULL;
- bfd_reloc_status_type r =
- bfd_perform_relocation (stub_bfd, *parent,
- stub_list->stub_contents,
- stub_sec, (bfd *) NULL, &err);
-
- /* If there was an error, tell someone about it. */
- if (r != bfd_reloc_ok)
- {
- struct bfd_link_info *link_info = stub_list->link_info;
-
- switch (r)
- {
- case bfd_reloc_undefined:
- if (! ((*link_info->callbacks->undefined_symbol)
- (link_info,
- bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
- stub_bfd, stub_sec, (*parent)->address)))
- abort ();
- break;
- case bfd_reloc_dangerous:
- if (! ((*link_info->callbacks->reloc_dangerous)
- (link_info, err, stub_bfd, stub_sec,
- (*parent)->address)))
- abort ();
- break;
- case bfd_reloc_overflow:
- {
- if (! ((*link_info->callbacks->reloc_overflow)
- (link_info,
- bfd_asymbol_name (*(*parent)->sym_ptr_ptr),
- (*parent)->howto->name,
- (*parent)->addend,
- stub_bfd, stub_sec,
- (*parent)->address)))
- abort ();
- }
- break;
- case bfd_reloc_outofrange:
- default:
- abort ();
- break;
- }
- }
+ bfd_set_error (bfd_error_bad_value);
+ free (contents);
+ return false;
}
+ args_hash->arg_bits = value;
+ break;
}
- free (reloc_vector);
+ else
+ break;
- /* All done with the relocations. Set the final contents
- of the stub section. FIXME: no check of return value! */
- bfd_set_section_contents (output_bfd, stub_sec,
- stub_list->stub_contents,
- 0, stub_list->real_size);
+ default:
+ bfd_set_error (bfd_error_bad_value);
+ free (contents);
+ return false;
}
}
- /* All done. */
- stubs_finished = true;
+ free (contents);
+ return true;
}
-/* Allocate a new relocation entry to be used in a linker stub. */
+/* Undo the generic ELF code's subtraction of section->vma from the
+ value of each external symbol. */
-static void
-hppa_elf_stub_reloc (stub_desc, output_bfd, target_sym, offset, type)
- elf32_hppa_stub_description *stub_desc;
- bfd *output_bfd;
- asymbol **target_sym;
- int offset;
- elf32_hppa_reloc_type type;
+static boolean
+elf32_hppa_add_symbol_hook (abfd, info, sym, namep, flagsp, secp, valp)
+ bfd *abfd;
+ struct bfd_link_info *info;
+ const Elf_Internal_Sym *sym;
+ const char **namep;
+ flagword *flagsp;
+ asection **secp;
+ bfd_vma *valp;
{
- arelent relent;
- int size;
- Elf_Internal_Shdr *rela_hdr;
-
- /* I really don't like the realloc nonsense in here. FIXME. */
- if (stub_desc->relocs_allocated_cnt == stub_desc->stub_sec->reloc_count)
- {
- /* Allocate the first few relocation entries. */
- if (stub_desc->stub_sec->relocation == NULL)
- {
- stub_desc->relocs_allocated_cnt = STUB_RELOC_INCR;
- size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
- stub_desc->stub_sec->relocation = (arelent *) bfd_zmalloc (size);
- }
- else
- {
- /* We've used all the entries we've already allocated. So get
- some more. */
- stub_desc->relocs_allocated_cnt += STUB_RELOC_INCR;
- size = sizeof (arelent) * stub_desc->relocs_allocated_cnt;
- stub_desc->stub_sec->relocation = (arelent *)
- realloc (stub_desc->stub_sec->relocation, size);
- }
- if (!stub_desc->stub_sec->relocation)
- {
- bfd_set_error (bfd_error_no_memory);
- abort (); /* FIXME */
- }
- }
-
- rela_hdr = &elf_section_data(stub_desc->stub_sec)->rel_hdr;
- rela_hdr->sh_size += sizeof(Elf32_External_Rela);
-
- /* Fill in the details. */
- relent.address = offset;
- relent.addend = 0;
- relent.sym_ptr_ptr = target_sym;
- relent.howto = bfd_reloc_type_lookup (stub_desc->this_bfd, type);
-
- /* Save it in the array of relocations for the stub section. */
- memcpy (&stub_desc->stub_sec->relocation[stub_desc->stub_sec->reloc_count++],
- &relent, sizeof (arelent));
+ *valp += (*secp)->vma;
+ return true;
}
-/* Build an argument relocation stub. RTN_ADJUST is a hint that an
- adjust to the return pointer from within the stub itself may be
- needed. */
+/* Determine the name of the stub needed to perform a call assuming the
+ argument relocation bits for caller and callee are in CALLER and CALLEE
+ for a call from LOCATION to DESTINATION. Copy the name into STUB_NAME. */
-static asymbol *
-hppa_elf_build_linker_stub (abfd, output_bfd, link_info, reloc_entry,
- stub_types, rtn_adjust, data, linker_stub_type)
- bfd *abfd;
- bfd *output_bfd;
- struct bfd_link_info *link_info;
- arelent *reloc_entry;
- arg_reloc_type stub_types[5];
- int rtn_adjust;
- unsigned *data;
- hppa_stub_type linker_stub_type;
+static void
+elf32_hppa_name_of_stub (caller, callee, location, destination, stub_name)
+ unsigned int caller, callee;
+ bfd_vma location, destination;
+ char *stub_name;
{
- int i;
- boolean milli, dyncall;
- char stub_sym_name[128];
- elf32_hppa_stub_name_list *stub_entry;
- /* Some initialization. */
- unsigned insn = data[0];
- asymbol *stub_sym = NULL;
- asymbol **orig_sym = reloc_entry->sym_ptr_ptr;
- asection *stub_sec = bfd_get_section_by_name (abfd, ".PARISC.stubs");
- elf32_hppa_stub_description *stub_desc = find_stubs (abfd, stub_sec);
-
- /* Perform some additional checks on whether we should really do the
- return adjustment. For example, if the instruction is nullified
- or if the delay slot contains an instruction that modifies the return
- pointer, then the branch instructions should not be rearranged
- (rtn_adjust is false). */
- if (insn & 2 || insn == 0)
- rtn_adjust = false;
- else
- {
- unsigned delay_insn = data[1];
-
- if (get_opcode (delay_insn) == LDO
- && (((insn & 0x03e00000) >> 21) == ((delay_insn & 0x001f0000) >> 16)))
- rtn_adjust = false;
- }
-
- /* Some special code for long-call stubs. */
- if (linker_stub_type == HPPA_STUB_LONG_CALL)
- {
-
- /* Is this a millicode call? If so, the return address
- comes in on r31 rather than r2 (rp) so a slightly
- different code sequence is needed. */
- unsigned rtn_reg = (insn & 0x03e00000) >> 21;
- if (rtn_reg == 31)
- milli = true;
-
- /* Dyncall is special because the user code has already
- put the return pointer in %r2 (aka RP). Other millicode
- calls have the return pointer in %r31. */
- if (strcmp ((*orig_sym)->name, "$$dyncall") == 0)
- dyncall = true;
-
- /* If we are creating a call from a stub to another stub, then
- never do the instruction reordering. We can tell if we are
- going to be calling one stub from another by the fact that
- the symbol name has '_stub_' (arg. reloc. stub) or '_lb_stub_'
- prepended to the name. Alternatively, the section of the
- symbol will be '.PARISC.stubs'. This is only an issue
- for long-calls; they are the only stubs allowed to call another
- stub. */
- if ((strncmp ((*orig_sym)->name, "_stub_", 6) == 0)
- || (strncmp ((*orig_sym)->name, "_lb_stub_", 9) == 0))
- {
- BFD_ASSERT (strcmp ((*orig_sym)->section->name, ".PARISC.stubs")
- == 0);
- rtn_adjust = false;
- }
- }
+ arg_reloc_type arg_reloc_types[5];
- /* Create the stub section if necessary. */
- if (!stub_sec)
+ if (elf32_hppa_arg_reloc_needed (caller, callee, arg_reloc_types))
{
- BFD_ASSERT (stub_desc == NULL);
- hppa_elf_create_stub_sec (abfd, output_bfd, &stub_sec, link_info);
- stub_desc = new_stub (abfd, stub_sec, link_info);
- }
-
- /* Make the stub if we did not find one already. */
- if (!stub_desc)
- stub_desc = new_stub (abfd, stub_sec, link_info);
+ arg_reloc_location i;
+ /* Fill in the basic template. */
+ strcpy (stub_name, "__XX_XX_XX_XX_XX_stub_");
- /* Allocate space to write the stub.
- FIXME: Why using realloc?!? */
- if (!stub_desc->stub_contents)
- {
- stub_desc->allocated_size = STUB_BUFFER_INCR;
- stub_desc->stub_contents = (char *) malloc (STUB_BUFFER_INCR);
- }
- else if ((stub_desc->allocated_size - stub_desc->real_size) < STUB_MAX_SIZE)
- {
- stub_desc->allocated_size = stub_desc->allocated_size + STUB_BUFFER_INCR;
- stub_desc->stub_contents = (char *) realloc (stub_desc->stub_contents,
- stub_desc->allocated_size);
- }
-
- /* If no memory die. (I seriously doubt the other routines
- are prepared to get a NULL return value). */
- if (!stub_desc->stub_contents)
- {
- bfd_set_error (bfd_error_no_memory);
- abort ();
+ /* Now fix the specifics. */
+ for (i = ARG0; i <= RET; i++)
+ switch (arg_reloc_types[i])
+ {
+ case NO:
+ stub_name[3 * i + 2] = 'N';
+ stub_name[3 * i + 3] = 'O';
+ break;
+ case GF:
+ stub_name[3 * i + 2] = 'G';
+ stub_name[3 * i + 3] = 'F';
+ break;
+ case FG:
+ stub_name[3 * i + 2] = 'F';
+ stub_name[3 * i + 3] = 'G';
+ break;
+ case GD:
+ stub_name[3 * i + 2] = 'G';
+ stub_name[3 * i + 3] = 'D';
+ break;
+ case DG:
+ stub_name[3 * i + 2] = 'D';
+ stub_name[3 * i + 3] = 'G';
+ break;
+ }
}
-
- /* Generate an appropriate name for this stub. */
- if (linker_stub_type == HPPA_STUB_ARG_RELOC)
- sprintf (stub_sym_name,
- "_stub_%s_%02d_%02d_%02d_%02d_%02d_%s",
- reloc_entry->sym_ptr_ptr[0]->name,
- stub_types[0], stub_types[1], stub_types[2],
- stub_types[3], stub_types[4],
- rtn_adjust ? "RA" : "");
else
- sprintf (stub_sym_name,
- "_lb_stub_%s_%s", reloc_entry->sym_ptr_ptr[0]->name,
- rtn_adjust ? "RA" : "");
-
+ strcpy (stub_name, "_____long_branch_stub_");
+}
- stub_desc->stub_secp
- = (int *) (stub_desc->stub_contents + stub_desc->real_size);
- stub_entry = find_stub_by_name (abfd, stub_sec, stub_sym_name);
+/* Determine if an argument relocation stub is needed to perform a
+ call assuming the argument relocation bits for caller and callee
+ are in CALLER and CALLEE. Place the type of relocations (if any)
+ into stub_types_p. */
- /* See if we already have one by this name. */
- if (stub_entry)
- {
- /* Yes, re-use it. Redirect the original relocation from the
- old symbol (a function symbol) to the stub (the stub will call
- the original function). */
- stub_sym = stub_entry->sym;
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (abfd,
- sizeof (asymbol **));
- if (reloc_entry->sym_ptr_ptr == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- abort ();
- }
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- if (linker_stub_type == HPPA_STUB_LONG_CALL
- || (reloc_entry->howto->type != R_PARISC_PLABEL32
- && (get_opcode(insn) == BLE
- || get_opcode (insn) == BE
- || get_opcode (insn) == BL)))
- reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_PARISC_STUB_CALL_17);
- }
+static boolean
+elf32_hppa_arg_reloc_needed (caller, callee, stub_types)
+ unsigned int caller, callee;
+ arg_reloc_type stub_types[5];
+{
+ /* Special case for no relocations. */
+ if (caller == 0 || callee == 0)
+ return 0;
else
{
- /* Create a new symbol to point to this stub. */
- stub_sym = bfd_make_empty_symbol (abfd);
- if (!stub_sym)
+ arg_location caller_loc[5];
+ arg_location callee_loc[5];
+
+ /* Extract the location information for the argument and return
+ value on both the caller and callee sides. */
+ caller_loc[ARG0] = EXTRACT_ARBITS (caller, ARG0);
+ callee_loc[ARG0] = EXTRACT_ARBITS (callee, ARG0);
+ caller_loc[ARG1] = EXTRACT_ARBITS (caller, ARG1);
+ callee_loc[ARG1] = EXTRACT_ARBITS (callee, ARG1);
+ caller_loc[ARG2] = EXTRACT_ARBITS (caller, ARG2);
+ callee_loc[ARG2] = EXTRACT_ARBITS (callee, ARG2);
+ caller_loc[ARG3] = EXTRACT_ARBITS (caller, ARG3);
+ callee_loc[ARG3] = EXTRACT_ARBITS (callee, ARG3);
+ caller_loc[RET] = EXTRACT_ARBITS (caller, RET);
+ callee_loc[RET] = EXTRACT_ARBITS (callee, RET);
+
+ /* Check some special combinations. This is necessary to
+ deal with double precision FP arguments. */
+ if (caller_loc[ARG0] == AR_FU || caller_loc[ARG1] == AR_FU)
{
- bfd_set_error (bfd_error_no_memory);
- abort ();
+ caller_loc[ARG0] = AR_FPDBL1;
+ caller_loc[ARG1] = AR_NO;
}
- stub_sym->name = bfd_zalloc (abfd, strlen (stub_sym_name) + 1);
- if (!stub_sym->name)
+ if (caller_loc[ARG2] == AR_FU || caller_loc[ARG3] == AR_FU)
{
- bfd_set_error (bfd_error_no_memory);
- abort ();
+ caller_loc[ARG2] = AR_FPDBL2;
+ caller_loc[ARG3] = AR_NO;
}
- strcpy ((char *) stub_sym->name, stub_sym_name);
- stub_sym->value
- = (char *) stub_desc->stub_secp - (char *) stub_desc->stub_contents;
- stub_sym->section = stub_sec;
- stub_sym->flags = BSF_LOCAL | BSF_FUNCTION;
- stub_entry = add_stub_by_name (abfd, stub_sec, stub_sym, link_info);
-
- /* Redirect the original relocation from the old symbol (a function)
- to the stub (the stub calls the function). */
- reloc_entry->sym_ptr_ptr = (asymbol **) bfd_zalloc (abfd,
- sizeof (asymbol **));
- if (reloc_entry->sym_ptr_ptr == NULL)
+ if (callee_loc[ARG0] == AR_FU || callee_loc[ARG1] == AR_FU)
{
- bfd_set_error (bfd_error_no_memory);
- abort ();
+ callee_loc[ARG0] = AR_FPDBL1;
+ callee_loc[ARG1] = AR_NO;
}
- reloc_entry->sym_ptr_ptr[0] = stub_sym;
- if (linker_stub_type == HPPA_STUB_LONG_CALL
- || (reloc_entry->howto->type != R_PARISC_PLABEL32
- && (get_opcode (insn) == BLE
- || get_opcode (insn) == BE
- || get_opcode (insn) == BL)))
- reloc_entry->howto = bfd_reloc_type_lookup (abfd, R_PARISC_STUB_CALL_17);
-
- /* Now generate the code for the stub. Starting with two
- common instructions.
-
- FIXME: Do we still need the SP adjustment?
- Do we still need to muck with space registers? */
- NEW_INSTRUCTION (stub_entry, LDSID_31_1)
- NEW_INSTRUCTION (stub_entry, MTSP_1_SR0)
-
- if (linker_stub_type == HPPA_STUB_ARG_RELOC)
+ if (callee_loc[ARG2] == AR_FU || callee_loc[ARG3] == AR_FU)
{
- NEW_INSTRUCTION (stub_entry, ADDI_8_SP)
+ callee_loc[ARG2] = AR_FPDBL2;
+ callee_loc[ARG3] = AR_NO;
+ }
- /* Examine each argument, generating code to relocate it
- into a different register if necessary. */
- for (i = ARG0; i < ARG3; i++)
- {
- switch (stub_types[i])
- {
+ /* Now look up any relocation needed for each argument and the
+ return value. */
+ stub_types[ARG0] = arg_mismatches[caller_loc[ARG0]][callee_loc[ARG0]];
+ stub_types[ARG1] = arg_mismatches[caller_loc[ARG1]][callee_loc[ARG1]];
+ stub_types[ARG2] = arg_mismatches[caller_loc[ARG2]][callee_loc[ARG2]];
+ stub_types[ARG3] = arg_mismatches[caller_loc[ARG3]][callee_loc[ARG3]];
+ stub_types[RET] = ret_mismatches[caller_loc[RET]][callee_loc[RET]];
+
+ return (stub_types[ARG0] != NO
+ || stub_types[ARG1] != NO
+ || stub_types[ARG2] != NO
+ || stub_types[ARG3] != NO
+ || stub_types[RET] != NO);
+ }
+}
- case NO_ARG_RELOC:
- continue;
+/* Compute the size of the stub needed to call from LOCATION to DESTINATION
+ (a function named SYM_NAME), with argument relocation bits CALLER and
+ CALLEE. Return zero if no stub is needed to perform such a call. */
- case R_TO_FR:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, STWS_ARG0_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG0)
- break;
- case ARG1:
- NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG1)
- break;
- case ARG2:
- NEW_INSTRUCTION (stub_entry, STWS_ARG2_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG2)
- break;
- case ARG3:
- NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FARG3)
- break;
- }
- continue;
-
- case R01_TO_FR:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, STWS_ARG0_M4SP)
- NEW_INSTRUCTION (stub_entry, STWS_ARG1_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG1)
- break;
- default:
- abort ();
- break;
- }
- continue;
+static unsigned int
+elf32_hppa_size_of_stub (callee, caller, location, destination, sym_name)
+ unsigned int callee, caller;
+ bfd_vma location, destination;
+ const char *sym_name;
+{
+ arg_reloc_type arg_reloc_types[5];
+
+ /* Determine if a long branch or argument relocation stub is needed.
+ If an argument relocation stub is needed, the relocation will be
+ stored into arg_reloc_types. */
+ if (!(((int)(location - destination) > 0x3ffff)
+ || ((int)(location - destination) < (int)0xfffc0000)
+ || elf32_hppa_arg_reloc_needed (caller, callee, arg_reloc_types)))
+ return 0;
- case R23_TO_FR:
- switch (i)
- {
- case ARG2:
- NEW_INSTRUCTION (stub_entry, STWS_ARG2_M4SP)
- NEW_INSTRUCTION (stub_entry, STWS_ARG3_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDDS_M8SP_FARG3)
- break;
- default:
- abort ();
- break;
- }
- continue;
+ /* Some kind of stub is needed. Determine how big it needs to be.
+ First check for argument relocation stubs as they also handle
+ long calls. Then check for long calls to millicode and finally
+ the normal long calls. */
+ if (arg_reloc_types[ARG0] != NO
+ || arg_reloc_types[ARG1] != NO
+ || arg_reloc_types[ARG2] != NO
+ || arg_reloc_types[ARG3] != NO
+ || arg_reloc_types[RET] != NO)
+ {
+ /* Some kind of argument relocation stub is needed. */
+ unsigned int len = 16;
+ arg_reloc_location i;
+
+ /* Each GR or FG relocation takes 2 insns, each GD or DG
+ relocation takes 3 insns. Plus 4 more insns for the
+ RP adjustment, ldil & (be | ble) and copy. */
+ for (i = ARG0; i <= RET; i++)
+ switch (arg_reloc_types[i])
+ {
+ case GF:
+ case FG:
+ len += 8;
+ break;
- case FR_TO_R:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG0_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
- break;
- case ARG1:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG1_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG1)
- break;
- case ARG2:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG2_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
- break;
- case ARG3:
- NEW_INSTRUCTION (stub_entry, FSTWS_FARG3_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG3)
- break;
- }
- continue;
-
- case FR_TO_R01:
- switch (i)
- {
- case ARG0:
- NEW_INSTRUCTION (stub_entry, FSTDS_FARG1_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG0)
- NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG1)
- break;
- default:
- abort ();
- break;
- }
- continue;
-
- case FR_TO_R23:
- switch (i)
- {
- case ARG2:
- NEW_INSTRUCTION (stub_entry, FSTDS_FARG3_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_ARG2)
- NEW_INSTRUCTION (stub_entry, LDWS_M8SP_ARG3)
- break;
- default:
- abort ();
- break;
- }
- continue;
+ case GD:
+ case DG:
+ len += 12;
+ break;
- default:
- abort ();
- break;
- }
- }
+ default:
+ break;
+ }
+
+ /* Extra instructions are needed if we're relocating a return value. */
+ if (arg_reloc_types[RET] != NO)
+ len += 12;
+
+ return len;
+ }
+ else if (!strncmp ("$$", sym_name, 2)
+ && strcmp ("$$dyncall", sym_name))
+ return 12;
+ else
+ return 16;
+}
- /* Put the stack pointer back. FIXME: Is this still necessary? */
- NEW_INSTRUCTION (stub_entry, ADDI_M8_SP_SP)
+/* Build one linker stub as defined by the stub hash table entry GEN_ENTRY.
+ IN_ARGS contains the stub BFD and link info pointers. */
+
+static boolean
+elf32_hppa_build_one_stub (gen_entry, in_args)
+ struct bfd_hash_entry *gen_entry;
+ PTR in_args;
+{
+ void **args = (void **)in_args;
+ bfd *stub_bfd = (bfd *)args[0];
+ struct bfd_link_info *info = (struct bfd_link_info *)args[1];
+ struct elf32_hppa_stub_hash_entry *entry;
+ struct elf32_hppa_stub_hash_table *stub_hash_table;
+ bfd_byte *loc;
+ symvalue sym_value;
+ const char *sym_name;
+
+ /* Initialize pointers to the stub hash table, the particular entry we
+ are building a stub for, and where (in memory) we should place the stub
+ instructions. */
+ entry = (struct elf32_hppa_stub_hash_entry *)gen_entry;
+ stub_hash_table = elf32_hppa_hash_table(info)->stub_hash_table;
+ loc = stub_hash_table->location;
+
+ /* Make a note of the offset within the stubs for this entry. */
+ entry->offset = stub_hash_table->offset;
+
+ /* The symbol's name starts at offset 22. */
+ sym_name = entry->root.string + 22;
+
+ sym_value = (entry->target_value
+ + entry->target_section->output_offset
+ + entry->target_section->output_section->vma);
+
+ if (strncmp ("_____long_branch_stub_", entry->root.string, 22))
+ {
+ /* This must be an argument or return value relocation stub. */
+ unsigned long insn;
+ arg_reloc_location i;
+ bfd_byte *begin_loc = loc;
+
+ /* First the return pointer adjustment. Depending on exact calling
+ sequence this instruction may be skipped. */
+ bfd_put_32 (stub_bfd, LDO_M4_R31_R31, loc);
+ loc += 4;
+
+ /* If we are relocating a return value, then we're going to have
+ to return into the stub. So we have to save off the user's
+ return pointer into the stack at RP'. */
+ if (strncmp (entry->root.string + 14, "NO", 2))
+ {
+ bfd_put_32 (stub_bfd, STW_R31_M8R30, loc);
+ loc += 4;
}
- /* Common code again. Return pointer adjustment and the like. */
- if (!dyncall)
+ /* Iterate over the argument relocations, emitting instructions
+ to move them around as necessary. */
+ for (i = ARG0; i <= ARG3; i++)
{
- /* This isn't dyncall. */
- if (!milli)
+ if (!strncmp (entry->root.string + 3 * i + 2, "GF", 2))
{
- /* It's not a millicode call, so get the correct return
- value into %r2 (aka RP). */
- if (rtn_adjust)
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
- else
- NEW_INSTRUCTION (stub_entry, COPY_31_2)
+ bfd_put_32 (stub_bfd, STW_ARG_M16R30 | ((26 - i) << 16), loc);
+ bfd_put_32 (stub_bfd, FLDW_M16R30_FARG | (4 + i), loc + 4);
+ loc += 8;
}
- else
+ else if (!strncmp (entry->root.string + 3 * i + 2, "FG", 2))
{
- /* It is a millicode call, so get the correct return
- value into %r1?!?. FIXME: Shouldn't this be
- %r31? Yes, and a little re-arrangement of the
- code below would make that possible. */
- if (rtn_adjust)
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_1)
- else
- NEW_INSTRUCTION (stub_entry, COPY_31_1)
+ bfd_put_32 (stub_bfd, FSTW_FARG_M16R30 | (4 + i), loc);
+ bfd_put_32 (stub_bfd, LDW_M16R30_ARG | ((26 - i) << 16), loc + 4);
+ loc += 8;
}
- }
- else
- {
- /* This is dyncall, so the code is a little different as the
- return pointer is already in %r2 (aka RP). */
- if (rtn_adjust)
- NEW_INSTRUCTION (stub_entry, ADDI_M4_31_RP)
- }
-
- /* Save the return address. */
- if (linker_stub_type == HPPA_STUB_ARG_RELOC)
- NEW_INSTRUCTION (stub_entry, STW_RP_M8SP)
-
- /* Long branch to the target function. */
- NEW_INSTRUCTION (stub_entry, LDIL_XXX_31)
- hppa_elf_stub_reloc (stub_entry->stub_desc,
- abfd, orig_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_PARISC_DIR21L);
- NEW_INSTRUCTION (stub_entry, BLE_XXX_0_31)
- hppa_elf_stub_reloc (stub_entry->stub_desc,
- abfd, orig_sym,
- CURRENT_STUB_OFFSET (stub_entry),
- R_PARISC_DIR17R);
-
- if (linker_stub_type == HPPA_STUB_ARG_RELOC)
- {
- /* In delay slot of long-call, copy %r31 into %r2 so that
- the callee can return in the normal fashion. */
- NEW_INSTRUCTION (stub_entry, COPY_31_2)
-
- /* Restore the return address. */
- NEW_INSTRUCTION (stub_entry, LDW_M8SP_RP)
-
- /* Generate the code to move the return value around. */
- switch (stub_types[RETVAL])
- {
- case NO_ARG_RELOC:
- break;
-
- case R_TO_FR:
- NEW_INSTRUCTION (stub_entry, STWS_RET0_M8SP)
- NEW_INSTRUCTION (stub_entry, FLDWS_M8SP_FRET0)
- break;
-
- case FR_TO_R:
- NEW_INSTRUCTION (stub_entry, FSTWS_FRET0_M8SP)
- NEW_INSTRUCTION (stub_entry, LDWS_M4SP_RET0)
- break;
-
- default:
- abort ();
- break;
- }
-
- /* Return back to the main code stream. */
- NEW_INSTRUCTION (stub_entry, BV_N_0_RP)
- }
- else
- {
- if (!dyncall)
+ else if (!strncmp (entry->root.string + 3 * i + 2, "GD", 2))
{
- /* Get return address into %r31. Both variants may be necessary
- (I think) as we could be cascading into another stub. */
- if (!milli)
- NEW_INSTRUCTION (stub_entry, COPY_2_31)
- else
- NEW_INSTRUCTION (stub_entry, COPY_1_31)
+ bfd_put_32 (stub_bfd, STW_ARG_M12R30 | ((26 - i) << 16), loc);
+ bfd_put_32 (stub_bfd, STW_ARG_M16R30 | ((25 - i) << 16), loc + 4);
+ bfd_put_32 (stub_bfd, FLDD_M16R30_FARG | (5 + i), loc + 8);
+ loc += 12;
}
- else
+ else if (!strncmp (entry->root.string + 3 * i + 2, "DG", 2))
{
- /* Get the return address into %r31 too. Might be necessary
- (I think) as we could be cascading into another stub. */
- NEW_INSTRUCTION (stub_entry, COPY_2_31)
+ bfd_put_32 (stub_bfd, FSTD_FARG_M16R30 | (5 + i), loc);
+ bfd_put_32 (stub_bfd, LDW_M12R30_ARG | ((26 - i) << 16), loc + 4);
+ bfd_put_32 (stub_bfd, LDW_M16R30_ARG | ((25 - i) << 16), loc + 8);
+ loc += 12;
}
-
- /* No need for a return to the main stream. */
}
- }
- return stub_sym;
-}
-/* Return nonzero if an argument relocation will be needed to call
- the function (symbol in RELOC_ENTRY) assuming the caller has
- argument relocation bugs CALLER_AR. */
-
-static int
-hppa_elf_arg_reloc_needed_p (abfd, reloc_entry, stub_types, caller_ar)
- bfd *abfd;
- arelent *reloc_entry;
- arg_reloc_type stub_types[5];
- symext_entryS caller_ar;
-{
- /* If the symbol is still undefined, then it's impossible to know
- if an argument relocation is needed. */
- if (reloc_entry->sym_ptr_ptr[0]
- && reloc_entry->sym_ptr_ptr[0]->section != &bfd_und_section)
- {
- symext_entryS callee_ar = elf32_hppa_get_sym_extn (abfd,
- reloc_entry->sym_ptr_ptr[0],
- PARISC_SXT_ARG_RELOC);
+ /* Load the high bits of the target address into %r1. */
+ insn = hppa_rebuild_insn (stub_bfd, LDIL_R1,
+ hppa_field_adjust (sym_value, 0, e_lrsel), 21);
+ bfd_put_32 (stub_bfd, insn, loc);
+ loc += 4;
- /* Now examine all the argument and return value location
- information to determine if a relocation stub will be needed. */
- if (caller_ar && callee_ar)
+ /* If we are relocating a return value, then we're going to have
+ to return into the stub, then perform the return value relocation. */
+ if (strncmp (entry->root.string + 14, "NO", 2))
{
- arg_location caller_loc[5];
- arg_location callee_loc[5];
-
- /* Extract the location information for the return value
- and argument registers separately. */
- callee_loc[RETVAL] = EXTRACT_ARBITS (callee_ar, RETVAL);
- caller_loc[RETVAL] = EXTRACT_ARBITS (caller_ar, RETVAL);
- callee_loc[ARG0] = EXTRACT_ARBITS (callee_ar, ARG0);
- caller_loc[ARG0] = EXTRACT_ARBITS (caller_ar, ARG0);
- callee_loc[ARG1] = EXTRACT_ARBITS (callee_ar, ARG1);
- caller_loc[ARG1] = EXTRACT_ARBITS (caller_ar, ARG1);
- callee_loc[ARG2] = EXTRACT_ARBITS (callee_ar, ARG2);
- caller_loc[ARG2] = EXTRACT_ARBITS (caller_ar, ARG2);
- callee_loc[ARG3] = EXTRACT_ARBITS (callee_ar, ARG3);
- caller_loc[ARG3] = EXTRACT_ARBITS (caller_ar, ARG3);
-
- /* Check some special combinations. For example, if FU
- appears in ARG1 or ARG3, we can move it to ARG0 or ARG2,
- respectively. (I guess this braindamage is correct? It'd
- take an hour or two of reading PA calling conventions to
- really know). */
-
- if (caller_loc[ARG0] == AR_FU || caller_loc[ARG1] == AR_FU)
+ /* To return to the stub we "ble" to the target and copy the return
+ pointer from %r31 into %r2. */
+ insn = hppa_rebuild_insn (stub_bfd,
+ BLE_SR4_R1,
+ hppa_field_adjust (sym_value, 0,
+ e_rrsel) >> 2,
+ 17);
+ bfd_put_32 (stub_bfd, insn, loc);
+ bfd_put_32 (stub_bfd, COPY_R31_R2, loc + 4);
+
+ /* Reload the return pointer for our caller from the stack. */
+ bfd_put_32 (stub_bfd, LDW_M8R30_R31, loc + 8);
+ loc += 12;
+
+ /* Perform the return value relocation. */
+ if (!strncmp (entry->root.string + 14, "GF", 2))
{
- caller_loc[ARG0] = AR_DBL01;
- caller_loc[ARG1] = AR_NO;
+ bfd_put_32 (stub_bfd, STW_ARG_M16R30 | (28 << 16), loc);
+ bfd_put_32 (stub_bfd, FLDW_M16R30_FARG | 4, loc + 4);
+ loc += 8;
}
- if (caller_loc[ARG2] == AR_FU || caller_loc[ARG3] == AR_FU)
+ else if (!strncmp (entry->root.string + 14, "FG", 2))
{
- caller_loc[ARG2] = AR_DBL23;
- caller_loc[ARG3] = AR_NO;
+ bfd_put_32 (stub_bfd, FSTW_FARG_M16R30 | 4, loc);
+ bfd_put_32 (stub_bfd, LDW_M16R30_ARG | (28 << 16), loc + 4);
+ loc += 8;
}
- if (callee_loc[ARG0] == AR_FU || callee_loc[ARG1] == AR_FU)
+ else if (!strncmp (entry->root.string + 2, "GD", 2))
{
- callee_loc[ARG0] = AR_DBL01;
- callee_loc[ARG1] = AR_NO;
+ bfd_put_32 (stub_bfd, STW_ARG_M12R30 | (28 << 16), loc);
+ bfd_put_32 (stub_bfd, STW_ARG_M16R30 | (29 << 16), loc + 4);
+ bfd_put_32 (stub_bfd, FLDD_M16R30_FARG | 4, loc + 8);
+ loc += 12;
}
- if (callee_loc[ARG2] == AR_FU || callee_loc[ARG3] == AR_FU)
+ else if (!strncmp (entry->root.string + 2, "DG", 2))
{
- callee_loc[ARG2] = AR_DBL23;
- callee_loc[ARG3] = AR_NO;
+ bfd_put_32 (stub_bfd, FSTD_FARG_M16R30 | 4, loc);
+ bfd_put_32 (stub_bfd, LDW_M12R30_ARG | (28 << 16), loc + 4);
+ bfd_put_32 (stub_bfd, LDW_M16R30_ARG | (29 << 16), loc + 8);
+ loc += 12;
}
+ /* Branch back to the user's code now. */
+ bfd_put_32 (stub_bfd, BV_N_0_R31, loc);
+ loc += 4;
+ }
+ else
+ {
+ /* No return value relocation, so we can simply "be" to the
+ target and copy out return pointer into %r2. */
+ insn = hppa_rebuild_insn (stub_bfd, BE_SR4_R1,
+ hppa_field_adjust (sym_value, 0,
+ e_rrsel) >> 2, 17);
+ bfd_put_32 (stub_bfd, insn, loc);
+ bfd_put_32 (stub_bfd, COPY_R31_R2, loc + 4);
+ loc += 8;
+ }
- /* Now look up potential mismatches. */
- stub_types[ARG0] = type_of_mismatch (caller_loc[ARG0],
- callee_loc[ARG0],
- ARGUMENTS);
- stub_types[ARG1] = type_of_mismatch (caller_loc[ARG1],
- callee_loc[ARG1],
- ARGUMENTS);
- stub_types[ARG2] = type_of_mismatch (caller_loc[ARG2],
- callee_loc[ARG2],
- ARGUMENTS);
- stub_types[ARG3] = type_of_mismatch (caller_loc[ARG3],
- callee_loc[ARG3],
- ARGUMENTS);
- stub_types[RETVAL] = type_of_mismatch (caller_loc[RETVAL],
- callee_loc[RETVAL],
- RETURN_VALUE);
-
- /* If any of the arguments or return value need an argument
- relocation, then we will need an argument relocation stub. */
- if (stub_types[ARG0] != NO_ARG_RELOC
- || stub_types[ARG1] != NO_ARG_RELOC
- || stub_types[ARG2] != NO_ARG_RELOC
- || stub_types[ARG3] != NO_ARG_RELOC
- || stub_types[RETVAL] != NO_ARG_RELOC)
- return 1;
+ /* Update the location and offsets. */
+ stub_hash_table->location += (loc - begin_loc);
+ stub_hash_table->offset += (loc - begin_loc);
+ }
+ else
+ {
+ /* Create one of two variant long branch stubs. One for $$dyncall and
+ normal calls, the other for calls to millicode. */
+ unsigned long insn;
+ int millicode_call = 0;
+
+ if (!strncmp ("$$", sym_name, 2) && strcmp ("$$dyncall", sym_name))
+ millicode_call = 1;
+
+ /* First the return pointer adjustment. Depending on exact calling
+ sequence this instruction may be skipped. */
+ bfd_put_32 (stub_bfd, LDO_M4_R31_R31, loc);
+
+ /* The next two instructions are the long branch itself. A long branch
+ is formed with "ldil" loading the upper bits of the target address
+ into a register, then branching with "be" which adds in the lower bits.
+ Long branches to millicode nullify the delay slot of the "be". */
+ insn = hppa_rebuild_insn (stub_bfd, LDIL_R1,
+ hppa_field_adjust (sym_value, 0, e_lrsel), 21);
+ bfd_put_32 (stub_bfd, insn, loc + 4);
+ insn = hppa_rebuild_insn (stub_bfd, BE_SR4_R1 | (millicode_call ? 2 : 0),
+ hppa_field_adjust (sym_value, 0, e_rrsel) >> 2,
+ 17);
+ bfd_put_32 (stub_bfd, insn, loc + 8);
+
+ if (!millicode_call)
+ {
+ /* The sequence to call this stub places the return pointer into %r31,
+ the final target expects the return pointer in %r2, so copy the
+ return pointer into the proper register. */
+ bfd_put_32 (stub_bfd, COPY_R31_R2, loc + 12);
+
+ /* Update the location and offsets. */
+ stub_hash_table->location += 16;
+ stub_hash_table->offset += 16;
}
+ else
+ {
+ /* Update the location and offsets. */
+ stub_hash_table->location += 12;
+ stub_hash_table->offset += 12;
+ }
+
}
- return 0;
+ return true;
}
-/* Create the linker stub section. */
-
-static void
-hppa_elf_create_stub_sec (abfd, output_bfd, secptr, link_info)
- bfd *abfd;
- bfd *output_bfd;
- asection **secptr;
- struct bfd_link_info *link_info;
-{
- asection *output_text_section;
-
- output_text_section = bfd_get_section_by_name (output_bfd, ".text");
- *secptr = bfd_make_section (abfd, ".PARISC.stubs");
- bfd_set_section_flags (abfd, *secptr,
- SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD
- | SEC_RELOC | SEC_CODE | SEC_READONLY);
- (*secptr)->output_section = output_text_section->output_section;
- (*secptr)->output_offset = 0;
-
- /* Set up the ELF section header for this new section. This
- is basically the same processing as elf_make_sections().
- elf_make_sections is static and therefore not accessable
- here. */
- {
- Elf_Internal_Shdr *this_hdr;
- this_hdr = &elf_section_data ((*secptr))->this_hdr;
-
- /* Set the sizes of this section. The contents have already
- been set up ?!? */
- this_hdr->sh_addr = (*secptr)->vma;
- this_hdr->sh_size = (*secptr)->_raw_size;
-
- /* Set appropriate flags for sections with relocations. */
- if ((*secptr)->flags & SEC_RELOC)
- {
- Elf_Internal_Shdr *rela_hdr;
- int use_rela_p = get_elf_backend_data (abfd)->use_rela_p;
-
- rela_hdr = &elf_section_data ((*secptr))->rel_hdr;
-
- if (use_rela_p)
- {
- rela_hdr->sh_type = SHT_RELA;
- rela_hdr->sh_entsize = sizeof (Elf32_External_Rela);
- }
- else
- {
- rela_hdr->sh_type = SHT_REL;
- rela_hdr->sh_entsize = sizeof (Elf32_External_Rel);
- }
- rela_hdr->sh_flags = 0;
- rela_hdr->sh_addr = 0;
- rela_hdr->sh_offset = 0;
- rela_hdr->sh_addralign = 0;
- rela_hdr->size = 0;
- }
-
- if ((*secptr)->flags & SEC_ALLOC)
- this_hdr->sh_flags |= SHF_ALLOC;
-
- if (!((*secptr)->flags & SEC_READONLY))
- this_hdr->sh_flags |= SHF_WRITE;
-
- if ((*secptr)->flags & SEC_CODE)
- this_hdr->sh_flags |= SHF_EXECINSTR;
- }
-
- bfd_set_section_alignment (abfd, *secptr, 2);
-}
+/* External entry points for sizing and building linker stubs. */
-/* Return nonzero if a long-call stub will be needed to call the
- function (symbol in RELOC_ENTRY). */
+/* Build all the stubs associated with the current output file. The
+ stubs are kept in a hash table attached to the main linker hash
+ table. This is called via hppaelf_finish in the linker. */
-static int
-hppa_elf_long_branch_needed_p (abfd, asec, reloc_entry, symbol, insn)
- bfd *abfd;
- asection *asec;
- arelent *reloc_entry;
- asymbol *symbol;
- unsigned insn;
+boolean
+elf32_hppa_build_stubs (stub_bfd, info)
+ bfd *stub_bfd;
+ struct bfd_link_info *info;
{
- long sym_value = get_symbol_value (symbol);
- int fmt = reloc_entry->howto->bitsize;
- unsigned char op = get_opcode (insn);
- unsigned raddr;
+ /* The stub BFD only has one section. */
+ asection *stub_sec = stub_bfd->sections;
+ struct elf32_hppa_stub_hash_table *table;
+ unsigned int size;
+ void *args[2];
+
+ /* So we can pass both the BFD for the stubs and the link info
+ structure to the routine which actually builds stubs. */
+ args[0] = stub_bfd;
+ args[1] = info;
+
+ /* Allocate memory to hold the linker stubs. */
+ size = bfd_section_size (stub_bfd, stub_sec);
+ stub_sec->contents = (unsigned char *) bfd_zalloc (stub_bfd, size);
+ if (stub_sec->contents == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ return false;
+ }
+ table = elf32_hppa_hash_table(info)->stub_hash_table;
+ table->location = stub_sec->contents;
-#define too_far(val,num_bits) \
- ((int)(val) > (1 << (num_bits)) - 1) || ((int)(val) < (-1 << (num_bits)))
+ /* Build the stubs as directed by the stub hash table. */
+ elf32_hppa_stub_hash_traverse (table, elf32_hppa_build_one_stub, args);
- switch (op)
- {
- case BL:
- raddr =
- reloc_entry->address + asec->output_offset + asec->output_section->vma;
- /* If the symbol and raddr (relocated addr?) are too far away from
- each other, then a long-call stub will be needed. */
- if (too_far (sym_value - raddr, fmt + 1))
- return 1;
- break;
- }
- return 0;
+ return true;
}
-/* Search the given section and determine if linker stubs will be
- needed for any calls within that section.
+/* Determine and set the size of the stub section for a final link.
- Return any new stub symbols created.
+ The basic idea here is to examine all the relocations looking for
+ PC-relative calls to a target that is unreachable with a "bl"
+ instruction or calls where the caller and callee disagree on the
+ location of their arguments or return value. */
- Used out of hppaelf.em in the linker. */
-
-asymbol *
-hppa_look_for_stubs_in_section (stub_bfd, abfd, output_bfd, asec,
- new_sym_cnt, link_info)
+boolean
+elf32_hppa_size_stubs (stub_bfd, output_bfd, link_info)
bfd *stub_bfd;
- bfd *abfd;
bfd *output_bfd;
- asection *asec;
- int *new_sym_cnt;
struct bfd_link_info *link_info;
{
- int i;
- arg_reloc_type stub_types[5];
- asymbol *new_syms = NULL;
- int new_cnt = 0;
- int new_max = 0;
- arelent **reloc_vector = NULL;
-
- /* Relocations are in different places depending on whether this is
- an output section or an input section. Also, the relocations are
- in different forms. Sigh. Luckily, we have bfd_canonicalize_reloc()
- to straighten this out for us . */
- if (asec->reloc_count > 0)
+ bfd *input_bfd;
+ asection *section, *stub_sec;
+ Elf_Internal_Shdr *symtab_hdr;
+ Elf_Internal_Sym *local_syms, *isym;
+ Elf32_External_Sym *ext_syms, *esym;
+ struct elf32_hppa_stub_hash_table *stub_hash_table = 0;
+ struct elf32_hppa_args_hash_table *args_hash_table = 0;
+
+ /* Create and initialize the stub hash table. */
+ stub_hash_table = ((struct elf32_hppa_stub_hash_table *)
+ malloc (sizeof (struct elf32_hppa_stub_hash_table)));
+ if (!stub_hash_table)
{
- reloc_vector
- = (arelent **) malloc (asec->reloc_count * (sizeof (arelent *) + 1));
- if (reloc_vector == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
-
- /* Make sure the canonical symbols are hanging around in a convient
- location. */
- if (bfd_get_outsymbols (abfd) == NULL)
- {
- long symsize;
- long symcount;
-
- symsize = bfd_get_symtab_upper_bound (abfd);
- if (symsize < 0)
- goto error_return;
- abfd->outsymbols = (asymbol **) bfd_alloc (abfd, symsize);
- if (!abfd->outsymbols && symsize != 0)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- symcount = bfd_canonicalize_symtab (abfd, abfd->outsymbols);
- if (symcount < 0)
- goto error_return;
- abfd->symcount = symcount;
- }
-
- /* Now get the relocations. */
- if (bfd_canonicalize_reloc (abfd, asec, reloc_vector,
- bfd_get_outsymbols (abfd)) < 0)
- goto error_return;
-
- /* Examine each relocation entry in this section. */
- for (i = 0; i < asec->reloc_count; i++)
- {
- arelent *rle = reloc_vector[i];
-
- switch (rle->howto->type)
- {
- /* Any call could need argument relocation stubs, and
- some may need long-call stubs. */
- case R_PARISC_PCREL21L:
- case R_PARISC_PCREL17R:
- case R_PARISC_PCREL17F:
- case R_PARISC_PCREL17C:
- case R_PARISC_PCREL14R:
- case R_PARISC_PCREL14F:
- {
- symext_entryS caller_ar
- = (symext_entryS) HPPA_R_ARG_RELOC (rle->addend);
- unsigned insn[2];
-
- /* We'll need this for the long-call checks. */
- bfd_get_section_contents (abfd, asec, insn, rle->address,
- sizeof(insn));
-
- /* See if this call needs an argument relocation stub. */
- if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
- caller_ar))
- {
- /* Generate a stub and keep track of the new symbol. */
- asymbol *r;
-
- if (new_cnt == new_max)
- {
- new_max += STUB_SYM_BUFFER_INC;
- new_syms = (asymbol *)
- realloc (new_syms, new_max * sizeof (asymbol));
- if (new_syms == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- }
-
- /* Build the argument relocation stub. */
- r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
- link_info, rle,
- stub_types, true, insn,
- HPPA_STUB_ARG_RELOC);
- new_syms[new_cnt++] = *r;
- }
-
- /* See if this call needs a long-call stub. */
- if (hppa_elf_long_branch_needed_p (abfd, asec, rle,
- rle->sym_ptr_ptr[0],
- insn[0]))
- {
- /* Generate a stub and keep track of the new symbol. */
- asymbol *r;
-
- if (new_cnt == new_max)
- {
- new_max += STUB_SYM_BUFFER_INC;
- new_syms = (asymbol *)
- realloc (new_syms, (new_max * sizeof (asymbol)));
- if (! new_syms)
- {
- bfd_set_error (bfd_error_no_memory);
- goto error_return;
- }
- }
-
- /* Build the long-call stub. */
- r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
- link_info, rle,
- NULL, true, insn,
- HPPA_STUB_LONG_CALL);
- new_syms[new_cnt++] = *r;
- }
- }
- break;
-
- /* PLABELs may need argument relocation stubs. */
- case R_PARISC_PLABEL32:
- case R_PARISC_PLABEL21L:
- case R_PARISC_PLABEL14R:
- {
- /* On a plabel relocation, assume the arguments of the
- caller are set up in general registers (indirect
- calls only use general registers.
- NOTE: 0x155 = ARGW0=GR,ARGW1=GR,ARGW2=GR,RETVAL=GR. */
- symext_entryS caller_ar = (symext_entryS) 0x155;
- unsigned insn[2];
-
- /* Do we really need this? */
- bfd_get_section_contents (abfd, asec, insn, rle->address,
- sizeof(insn));
-
- /* See if this call needs an argument relocation stub. */
- if (hppa_elf_arg_reloc_needed_p (abfd, rle, stub_types,
- caller_ar))
- {
- /* Generate a plabel stub and keep track of the
- new symbol. */
- asymbol *r;
- int rtn_adjust;
-
- if (new_cnt == new_max)
- {
- new_max += STUB_SYM_BUFFER_INC;
- new_syms = (asymbol *) realloc (new_syms, new_max
- * sizeof (asymbol));
- }
-
- /* Determine whether a return adjustment
- (see the relocation code for relocation type
- R_PARISC_STUB_CALL_17) is possible. Basically,
- determine whether we are looking at a branch or not. */
- if (rle->howto->type == R_PARISC_PLABEL32)
- rtn_adjust = false;
- else
- {
- switch (get_opcode(insn[0]))
- {
- case BLE:
- case BE:
- rtn_adjust = true;
- break;
- default:
- rtn_adjust = false;
- }
- }
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
- /* Build the argument relocation stub. */
- r = hppa_elf_build_linker_stub (stub_bfd, output_bfd,
- link_info, rle, stub_types,
- rtn_adjust, insn,
- HPPA_STUB_ARG_RELOC);
- new_syms[new_cnt++] = *r;
- }
- }
- break;
+ if (!elf32_hppa_stub_hash_table_init (stub_hash_table, stub_bfd,
+ elf32_hppa_stub_hash_newfunc))
+ goto error_return;
- default:
- break;
- }
- }
+ /* Likewise for the argument location hash table. */
+ args_hash_table = ((struct elf32_hppa_args_hash_table *)
+ malloc (sizeof (struct elf32_hppa_args_hash_table)));
+ if (!args_hash_table)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
}
- if (reloc_vector != NULL)
- free (reloc_vector);
- /* Return the new symbols and update the counters. */
- *new_sym_cnt = new_cnt;
- return new_syms;
-
- error_return:
- if (reloc_vector != NULL)
- free (reloc_vector);
- /* FIXME: This is bogus. We should be returning NULL. But do the callers
- check for that? */
- abort ();
-}
+ if (!elf32_hppa_args_hash_table_init (args_hash_table,
+ elf32_hppa_args_hash_newfunc))
+ goto error_return;
-/* Set the contents of a particular section at a particular location. */
+ /* Attach the hash tables to the main hash table. */
+ elf32_hppa_hash_table(link_info)->stub_hash_table = stub_hash_table;
+ elf32_hppa_hash_table(link_info)->args_hash_table = args_hash_table;
-static boolean
-hppa_elf_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
-{
- /* Linker stubs are handled a little differently. */
- if (! strcmp (section->name, ".PARISC.stubs"))
+ /* Walk over all the input BFDs adding entries to the args hash table
+ for all the external functions. */
+ for (input_bfd = link_info->input_bfds;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link_next)
{
- if (linker_stubs_max_size < offset + count)
- {
- linker_stubs_max_size = offset + count + STUB_ALLOC_INCR;
- linker_stubs = (char *)realloc (linker_stubs, linker_stubs_max_size);
- if (! linker_stubs)
- abort ();
- }
-
- if (offset + count > linker_stubs_size)
- linker_stubs_size = offset + count;
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
+ continue;
- /* Set the contents. */
- memcpy(linker_stubs + offset, location, count);
- return (true);
+ if (elf32_hppa_read_symext_info (input_bfd, symtab_hdr, args_hash_table,
+ NULL, false, true) == false)
+ goto error_return;
}
- /* Ignore write requests for the symbol extension section until we've
- had the chance to rebuild it ourselves. */
- else if (! strcmp (section->name, ".PARISC.symextn") && !symext_chain_size)
- return true;
- else
- return bfd_elf32_set_section_contents (abfd, section, location,
- offset, count);
-}
-/* Get the contents of the given section.
-
- This is special for PA ELF because some sections (such as linker stubs)
- may reside in memory rather than on disk, or in the case of the symbol
- extension section, the contents may need to be generated from other
- information contained in the BFD. */
+ /* Magic as we know the stub bfd only has one section. */
+ stub_sec = stub_bfd->sections;
-boolean
-hppa_elf_get_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
-{
- /* If this is the linker stub section, then its contents are contained
- in memory rather than on disk. FIXME. Is that always right? What
- about the case where a final executable is read in and a user tries
- to get the contents of this section? In that case the contents would
- be on disk like everything else. */
- if (strcmp (section->name, ".PARISC.stubs") == 0)
+ /* Now that we have argument location information for all the global
+ functions we can start looking for stubs. */
+ for (input_bfd = link_info->input_bfds;
+ input_bfd != NULL;
+ input_bfd = input_bfd->link_next)
{
- elf32_hppa_stub_description *stub_desc = find_stubs (abfd, section);
-
- if (count == 0)
- return true;
-
- /* Sanity check our arguments. */
- if ((bfd_size_type) (offset + count) > section->_raw_size
- || (bfd_size_type) (offset + count) > stub_desc->real_size)
- return (false);
-
- memcpy (location, stub_desc->stub_contents + offset, count);
- return (true);
- }
- else
- /* It's not the linker stub section, use the generic routines. */
- return _bfd_generic_get_section_contents (abfd, section, location,
- offset, count);
-}
+ unsigned int i;
-/* Translate from an elf into field into a howto relocation pointer. */
-
-static void
-elf_info_to_howto (abfd, cache_ptr, dst)
- bfd *abfd;
- arelent *cache_ptr;
- Elf32_Internal_Rela *dst;
-{
- BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_PARISC_UNIMPLEMENTED);
- cache_ptr->howto = &elf_hppa_howto_table[ELF32_R_TYPE (dst->r_info)];
-}
+ /* We'll need the symbol table in a second. */
+ symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
+ if (symtab_hdr->sh_info == 0)
+ continue;
-/* Do PA ELF specific processing for symbols. Needed to find the
- value of $global$. */
+ /* We need an array of the local symbols attached to the input bfd.
+ Unfortunately, we're going to have to read & swap them in. */
+ local_syms
+ = (Elf_Internal_Sym *)malloc (symtab_hdr->sh_info
+ * sizeof (Elf_Internal_Sym));
+ if (local_syms == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ goto error_return;
+ }
-static void
-elf32_hppa_backend_symbol_processing (abfd, sym)
- bfd *abfd;
- asymbol *sym;
-{
- /* Is this a definition of $global$? If so, keep it because it will be
- needed if any relocations are performed. */
- if (!strcmp (sym->name, "$global$")
- && sym->section != &bfd_und_section)
- {
- global_symbol = sym;
- }
-}
+ ext_syms
+ = (Elf32_External_Sym *)malloc (symtab_hdr->sh_info
+ * sizeof (Elf32_External_Sym));
+ if (ext_syms == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ free (local_syms);
+ goto error_return;
+ }
-/* Do some PA ELF specific work after reading in the symbol table.
- In particular attach the argument relocation from the
- symbol extension section to the appropriate symbols. */
-static boolean
-elf32_hppa_backend_symbol_table_processing (abfd, esyms,symcnt)
- bfd *abfd;
- elf_symbol_type *esyms;
- int symcnt;
-{
- Elf32_Internal_Shdr *symextn_hdr =
- bfd_elf_find_section (abfd, SYMEXTN_SECTION_NAME);
- int i, current_sym_idx = 0;
+ if (bfd_seek (input_bfd, symtab_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read (ext_syms, 1,
+ (symtab_hdr->sh_info
+ * sizeof (Elf32_External_Sym)), input_bfd)
+ != (symtab_hdr->sh_info * sizeof (Elf32_External_Sym)))
+ {
+ free (local_syms);
+ free (ext_syms);
+ goto error_return;
+ }
- /* If no symbol extension existed, then all symbol extension information
- is assumed to be zero. */
- if (symextn_hdr == NULL)
- {
- for (i = 0; i < symcnt; i++)
- esyms[i].tc_data.hppa_arg_reloc = 0;
- return (true);
- }
+ /* Swap the local symbols in. */
+ isym = local_syms;
+ esym = ext_syms;
+ for (i = 0; i < symtab_hdr->sh_info; i++, esym++, isym++)
+ bfd_elf32_swap_symbol_in (input_bfd, esym, isym);
- /* Allocate a buffer of the appropriate size for the symextn section. */
- symextn_hdr->contents = bfd_zalloc(abfd,symextn_hdr->sh_size);
- if (!symextn_hdr->contents)
- {
- bfd_set_error (bfd_error_no_memory);
- return false;
- }
- symextn_hdr->size = symextn_hdr->sh_size;
-
- /* Read in the symextn section. */
- if (bfd_seek (abfd, symextn_hdr->sh_offset, SEEK_SET) == -1)
- return false;
- if (bfd_read ((PTR) symextn_hdr->contents, 1, symextn_hdr->size, abfd)
- != symextn_hdr->size)
- return false;
+ /* Now we can free the external symbols. */
+ free (ext_syms);
- /* Parse entries in the symbol extension section, updating the symtab
- entries as we go */
- for (i = 0; i < symextn_hdr->size / sizeof(symext_entryS); i++)
- {
- symext_entryS *seP = ((symext_entryS *)symextn_hdr->contents) + i;
- int se_value = ELF32_PARISC_SX_VAL (*seP);
- int se_type = ELF32_PARISC_SX_TYPE (*seP);
+ if (elf32_hppa_read_symext_info (input_bfd, symtab_hdr, args_hash_table,
+ local_syms, true, false) == false)
+ {
+ free (local_syms);
+ goto error_return;
+ }
- switch (se_type)
+ /* If generating a relocateable output file, then we don't
+ have to examine the relocs. */
+ if (link_info->relocateable)
{
- case PARISC_SXT_NULL:
- break;
+ free (local_syms);
+ return true;
+ }
- case PARISC_SXT_SYMNDX:
- if (se_value >= symcnt)
+ /* Walk over each section attached to the input bfd. */
+ for (section = input_bfd->sections;
+ section != NULL;
+ section = section->next)
+ {
+ Elf_Internal_Shdr *input_rel_hdr;
+ Elf32_External_Rela *external_relocs, *erelaend, *erela;
+ Elf_Internal_Rela *internal_relocs, *irelaend, *irela;
+
+ /* If there aren't any relocs, then there's nothing to do. */
+ if ((section->flags & SEC_RELOC) == 0
+ || section->reloc_count == 0)
+ continue;
+
+ /* Allocate space for the external relocations. */
+ external_relocs
+ = (Elf32_External_Rela *) malloc (section->reloc_count * sizeof (Elf32_External_Rela));
+ if (external_relocs == NULL)
{
- bfd_set_error (bfd_error_bad_value);
- return (false);
+ bfd_set_error (bfd_error_no_memory);
+ free (local_syms);
+ goto error_return;
}
- current_sym_idx = se_value - 1;
- break;
- case PARISC_SXT_ARG_RELOC:
- esyms[current_sym_idx].tc_data.hppa_arg_reloc = se_value;
- break;
+ /* Likewise for the internal relocations. */
+ internal_relocs
+ = (Elf_Internal_Rela *) malloc (section->reloc_count * sizeof (Elf_Internal_Rela));
+ if (internal_relocs == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ free (external_relocs);
+ free (local_syms);
+ goto error_return;
+ }
- default:
- bfd_set_error (bfd_error_bad_value);
- return (false);
- }
- }
- return (true);
-}
+ /* Read in the external relocs. */
+ input_rel_hdr = &elf_section_data (section)->rel_hdr;
+ if (bfd_seek (input_bfd, input_rel_hdr->sh_offset, SEEK_SET) != 0
+ || bfd_read (external_relocs, 1, input_rel_hdr->sh_size,
+ input_bfd) != input_rel_hdr->sh_size)
+ {
+ free (external_relocs);
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
+ }
-/* Perform on PA ELF specific processing once a section has been
- read in. In particular keep the symbol indexes correct for
- the symbol extension information. */
+ /* Swap in the relocs. */
+ erela = external_relocs;
+ erelaend = erela + section->reloc_count;
+ irela = internal_relocs;
+ for (; erela < erelaend; erela++, irela++)
+ bfd_elf32_swap_reloca_in (input_bfd, erela, irela);
-static boolean
-elf32_hppa_backend_section_processing (abfd, secthdr)
- bfd *abfd;
- Elf32_Internal_Shdr *secthdr;
-{
- int i, j, k;
+ /* We're done with the external relocs, free them. */
+ free (external_relocs);
- if (secthdr->sh_type == SHT_PARISC_SYMEXTN)
- {
- for (i = 0; i < secthdr->size / sizeof (symext_entryS); i++)
- {
- symext_entryS *seP = ((symext_entryS *)secthdr->contents) + i;
- int se_value = ELF32_PARISC_SX_VAL (*seP);
- int se_type = ELF32_PARISC_SX_TYPE (*seP);
-
- switch (se_type)
+ /* Now examine each relocation. */
+ irela = internal_relocs;
+ irelaend = irela + section->reloc_count;
+ for (; irela < irelaend; irela++)
{
- case PARISC_SXT_NULL:
- break;
-
- case PARISC_SXT_SYMNDX:
- for (j = 0; j < abfd->symcount; j++)
+ long r_type, callee_args, caller_args, r_index, size_of_stub;
+ struct elf_link_hash_entry *hash;
+ struct elf32_hppa_stub_hash_entry *stub_hash;
+ struct elf32_hppa_args_hash_entry *args_hash;
+ Elf_Internal_Sym *sym;
+ asection *sym_sec;
+ const char *sym_name;
+ symvalue sym_value;
+ bfd_vma location, destination;
+ char *new_name = NULL;
+
+ r_type = ELF32_R_TYPE (irela->r_info);
+ r_index = ELF32_R_SYM (irela->r_info);
+
+ if (r_type < 0 || r_type >= (int) R_PARISC_UNIMPLEMENTED)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
+ }
+
+ /* Only look for stubs on call instructions or plabel
+ references. */
+ if (r_type != R_PARISC_PCREL17F
+ && r_type != R_PARISC_PLABEL32
+ && r_type != R_PARISC_PLABEL21L
+ && r_type != R_PARISC_PLABEL14R)
+ continue;
+
+ /* Now determine the call target, its name, value, section
+ and argument relocation bits. */
+ hash = NULL;
+ sym = NULL;
+ sym_sec = NULL;
+ if (r_index < symtab_hdr->sh_info)
{
- /* Locate the map entry for this symbol and modify the
- symbol extension section symbol index entry to reflect
- the new symbol table index. */
- for (k = 0; k < elf32_hppa_symextn_map_size; k++)
+ /* It's a local symbol. */
+ Elf_Internal_Shdr *hdr;
+
+ sym = local_syms + r_index;
+ hdr = elf_elfsections (input_bfd)[sym->st_shndx];
+ sym_sec = hdr->bfd_section;
+ sym_name = elf_string_from_elf_section (input_bfd,
+ symtab_hdr->sh_link,
+ sym->st_name);
+ sym_value = (ELF_ST_TYPE (sym->st_info) == STT_SECTION
+ ? 0 : sym->st_value);
+ destination = (sym_value
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+
+ /* Tack on an ID so we can uniquely identify this local
+ symbol in the stub or arg info hash tables. */
+ new_name = malloc (strlen (sym_name) + 10);
+ if (new_name == 0)
{
- if (elf32_hppa_symextn_map[k].old_index == se_value
- && elf32_hppa_symextn_map[k].bfd
- == abfd->outsymbols[j]->the_bfd
- && elf32_hppa_symextn_map[k].sym
- == abfd->outsymbols[j])
- {
- bfd_put_32(abfd,
- ELF32_PARISC_SX_WORD (PARISC_SXT_SYMNDX, j),
- (char *)seP);
- }
+ bfd_set_error (bfd_error_bad_value);
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
}
+ sprintf (new_name, "%s_%08x", sym_name, (int)sym_sec);
+ sym_name = new_name;
}
- break;
-
- case PARISC_SXT_ARG_RELOC:
- break;
-
- default:
- bfd_set_error (bfd_error_bad_value);
- return (false);
- }
- }
- }
- return true;
-}
-
-/* What does this really do? Just determine if there is an appropriate
- mapping from ELF section headers to backend sections? More symbol
- extension braindamage. */
-
-static boolean
-elf32_hppa_backend_section_from_shdr (abfd, hdr, name)
- bfd *abfd;
- Elf32_Internal_Shdr *hdr;
- char *name;
-{
- asection *newsect;
-
- if (hdr->sh_type == SHT_PARISC_SYMEXTN)
- {
- BFD_ASSERT (strcmp (name, ".PARISC.symextn") == 0);
-
- /* Bits that get saved. This one is real. */
- if (!hdr->rawdata)
- {
- newsect = bfd_make_section (abfd, name);
- if (newsect != NULL)
- {
- newsect->vma = hdr->sh_addr;
- newsect->_raw_size = hdr->sh_size;
- newsect->filepos = hdr->sh_offset;
- newsect->flags |= SEC_HAS_CONTENTS;
- newsect->alignment_power = hdr->sh_addralign;
-
- if (hdr->sh_flags & SHF_ALLOC)
+ else
{
- newsect->flags |= SEC_ALLOC;
- newsect->flags |= SEC_LOAD;
+ /* It's an external symbol. */
+ long index;
+
+ index = r_index - symtab_hdr->sh_info;
+ hash = elf_sym_hashes (input_bfd)[index];
+ if (hash->root.type == bfd_link_hash_defined)
+ {
+ sym_sec = hash->root.u.def.section;
+ sym_name = hash->root.root.string;
+ sym_value = hash->root.u.def.value;
+ destination = (sym_value
+ + sym_sec->output_offset
+ + sym_sec->output_section->vma);
+ }
+ else
+ {
+ bfd_set_error (bfd_error_bad_value);
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
+ }
}
- if (!(hdr->sh_flags & SHF_WRITE))
- newsect->flags |= SEC_READONLY;
+ args_hash = elf32_hppa_args_hash_lookup (args_hash_table,
+ sym_name, false, false);
- if (hdr->sh_flags & SHF_EXECINSTR)
- newsect->flags |= SEC_CODE;
+ /* Get both caller and callee argument information. */
+ if (args_hash == NULL)
+ callee_args = 0;
else
- newsect->flags |= SEC_DATA;
-
- hdr->rawdata = (void *) newsect;
- }
- }
- return true;
- }
- return false;
-}
+ callee_args = args_hash->arg_bits;
+
+ /* For calls get the caller's bits from the addend of
+ the call relocation. For PLABELS the caller's bits
+ are assumed to have all args & return values in general
+ registers (0x155). */
+ if (r_type == R_PARISC_PCREL17F)
+ caller_args = HPPA_R_ARG_RELOC (irela->r_addend);
+ else
+ caller_args = 0x155;
+
+ /* Now determine where the call point is. */
+ location = (section->output_offset
+ + section->output_section->vma
+ + irela->r_offset);
+
+ /* We only care about the destination for PCREL function
+ calls (eg. we don't care for PLABELS). */
+ if (r_type != R_PARISC_PCREL17F)
+ location = destination;
+
+ /* Determine what (if any) linker stub is needed and its
+ size (in bytes). */
+ size_of_stub = elf32_hppa_size_of_stub (callee_args,
+ caller_args,
+ location,
+ destination,
+ sym_name);
+ if (size_of_stub != 0)
+ {
+ char *stub_name;
+ unsigned int len;
-/* Return true if the given section is a fake section. */
+ /* Get the name of this stub. */
+ len = strlen (sym_name);
+ len += 23;
-static boolean
-elf32_hppa_backend_fake_sections (abfd, secthdr, asect)
- bfd *abfd;
- Elf_Internal_Shdr *secthdr;
- asection *asect;
-{
+ stub_name = malloc (len);
+ if (!stub_name)
+ {
+ bfd_set_error (bfd_error_no_memory);
- if (strcmp(asect->name, ".PARISC.symextn") == 0)
- {
- secthdr->sh_type = SHT_PARISC_SYMEXTN;
- secthdr->sh_flags = 0;
- secthdr->sh_info = elf_section_data(asect)->rel_hdr.sh_link;
- secthdr->sh_link = elf_onesymtab(abfd);
- return true;
- }
+ /* Because sym_name was mallocd above for local
+ symbols. */
+ if (r_index < symtab_hdr->sh_info)
+ free (new_name);
- if (!strcmp (asect->name, ".PARISC.unwind"))
- {
- secthdr->sh_type = SHT_PROGBITS;
- /* Unwind descriptors are not part of the program memory image. */
- secthdr->sh_flags = 0;
- secthdr->sh_info = 0;
- secthdr->sh_link = 0;
- secthdr->sh_entsize = 16;
- return true;
- }
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
+ }
+ elf32_hppa_name_of_stub (caller_args, callee_args,
+ location, destination, stub_name);
+ strcat (stub_name + 22, sym_name);
+
+ /* Because sym_name was malloced above for local symbols. */
+ if (r_index < symtab_hdr->sh_info)
+ free (new_name);
+
+ stub_hash
+ = elf32_hppa_stub_hash_lookup (stub_hash_table, stub_name,
+ false, false);
+ if (stub_hash != NULL)
+ {
+ /* The proper stub has already been created, nothing
+ else to do. */
+ free (stub_name);
+ }
+ else
+ {
+ bfd_set_section_size (stub_bfd, stub_sec,
+ (bfd_section_size (stub_bfd,
+ stub_sec)
+ + size_of_stub));
+
+ /* Enter this entry into the linker stub hash table. */
+ stub_hash
+ = elf32_hppa_stub_hash_lookup (stub_hash_table,
+ stub_name, true, true);
+ if (stub_hash == NULL)
+ {
+ bfd_set_error (bfd_error_no_memory);
+ free (stub_name);
+ free (internal_relocs);
+ free (local_syms);
+ goto error_return;
+ }
- /* @@ Should this be CPU specific?? KR */
- if (!strcmp (asect->name, ".stabstr"))
- {
- secthdr->sh_type = SHT_STRTAB;
- secthdr->sh_flags = 0;
- secthdr->sh_info = 0;
- secthdr->sh_link = 0;
- secthdr->sh_entsize = 0;
- return true;
+ /* We'll need these to determine the address that the
+ stub will branch to. */
+ stub_hash->target_value = sym_value;
+ stub_hash->target_section = sym_sec;
+ }
+ free (stub_name);
+ }
+ }
+ /* We're done with the internal relocs, free them. */
+ free (internal_relocs);
+ }
+ /* We're done with the local symbols, free them. */
+ free (local_syms);
}
+ return true;
- return false;
-}
-
-/* Return true if there is a mapping from bfd section into a
- backend section. */
-
-static boolean
-elf32_hppa_backend_section_from_bfd_section (abfd, hdr, asect, ignored)
- bfd *abfd;
- Elf32_Internal_Shdr *hdr;
- asection *asect;
- int *ignored;
-{
- if (hdr->sh_type == SHT_PARISC_SYMEXTN)
+error_return:
+ /* Return gracefully, avoiding dangling references to the hash tables. */
+ if (stub_hash_table)
{
- if (hdr->rawdata)
- {
- if (((struct sec *) (hdr->rawdata)) == asect)
- {
- BFD_ASSERT (strcmp (asect->name, ".PARISC.symextn") == 0);
- return true;
- }
- }
+ elf32_hppa_hash_table(link_info)->stub_hash_table = NULL;
+ free (stub_hash_table);
}
- else if (hdr->sh_type == SHT_STRTAB)
+ if (args_hash_table)
{
- if (hdr->rawdata)
- {
- if (((struct sec *) (hdr->rawdata)) == asect)
- {
- BFD_ASSERT (strcmp (asect->name, ".stabstr") == 0);
- return true;
- }
- }
+ elf32_hppa_hash_table(link_info)->args_hash_table = NULL;
+ free (args_hash_table);
}
-
return false;
}
-#define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
-#define elf_backend_section_from_bfd_section elf32_hppa_backend_section_from_bfd_section
-
-#define elf_backend_symbol_processing elf32_hppa_backend_symbol_processing
-#define elf_backend_symbol_table_processing elf32_hppa_backend_symbol_table_processing
-
-#define bfd_elf32_get_section_contents hppa_elf_get_section_contents
-#define bfd_elf32_set_section_contents hppa_elf_set_section_contents
+/* Misc BFD support code. */
+#define bfd_elf32_bfd_reloc_type_lookup elf_hppa_reloc_type_lookup
#define bfd_elf32_bfd_is_local_label hppa_elf_is_local_label
-#define elf_backend_section_processing elf32_hppa_backend_section_processing
-
-#define elf_backend_section_from_shdr elf32_hppa_backend_section_from_shdr
-#define elf_backend_fake_sections elf32_hppa_backend_fake_sections
+/* Symbol extension stuff. */
+#define bfd_elf32_set_section_contents elf32_hppa_set_section_contents
+#define elf_backend_symbol_table_processing \
+ elf32_hppa_backend_symbol_table_processing
#define elf_backend_begin_write_processing \
elf32_hppa_backend_begin_write_processing
#define elf_backend_final_write_processing \
elf32_hppa_backend_final_write_processing
+/* Stuff for the BFD linker. */
+#define elf_backend_relocate_section elf32_hppa_relocate_section
+#define elf_backend_add_symbol_hook elf32_hppa_add_symbol_hook
+#define elf_backend_link_output_symbol_hook \
+ elf32_hppa_link_output_symbol_hook
+#define bfd_elf32_bfd_link_hash_table_create \
+ elf32_hppa_link_hash_table_create
+
#define TARGET_BIG_SYM bfd_elf32_hppa_vec
#define TARGET_BIG_NAME "elf32-hppa"
#define ELF_ARCH bfd_arch_hppa
projects / binutils-gdb.git / commitdiff