/* BFD back-end data structures for ELF files.
- Copyright (C) 1992, 1993, 1994, 1995, 1996 Free Software Foundation, Inc.
+ Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
PTR any;
}
tc_data;
+
+ /* Version information. This is from an Elf_Internal_Versym
+ structure in a SHT_GNU_versym section. It is zero if there is no
+ version information. */
+ unsigned short version;
+
} elf_symbol_type;
\f
/* ELF linker hash table entries. */
struct elf_link_hash_entry *weakdef;
/* If this symbol requires an entry in the global offset table, the
- processor specific backend uses this field to hold the offset
- into the .got section. If this field is -1, then the symbol does
- not require a global offset table entry. */
- bfd_vma got_offset;
-
- /* If this symbol requires an entry in the procedure linkage table,
- the processor specific backend uses these two fields to hold the
- offset into the procedure linkage section and the offset into the
- .got section. If plt_offset is -1, then the symbol does not
- require an entry in the procedure linkage table. */
- bfd_vma plt_offset;
+ processor specific backend uses this field to track usage and
+ final offset. We use a union and two names primarily to document
+ the intent of any particular piece of code. The field should be
+ used as a count until size_dynamic_sections, at which point the
+ contents of the .got is fixed. Afterward, if this field is -1,
+ then the symbol does not require a global offset table entry. */
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } got;
+
+ /* Same, but tracks a procedure linkage table entry. */
+ union
+ {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } plt;
/* If this symbol is used in the linker created sections, the processor
specific backend uses this field to map the field into the offset
from the beginning of the section. */
struct elf_linker_section_pointers *linker_section_pointer;
+ /* Version information. */
+ union
+ {
+ /* This field is used for a symbol which is not defined in a
+ regular object. It points to the version information read in
+ from the dynamic object. */
+ Elf_Internal_Verdef *verdef;
+ /* This field is used for a symbol which is defined in a regular
+ object. It is set up in size_dynamic_sections. It points to
+ the version information we should write out for this symbol. */
+ struct bfd_elf_version_tree *vertree;
+ } verinfo;
+
+ /* Virtual table entry use information. This array is of size
+ size/sizeof(target_void_pointer), and indexed via
+ offset/sizeof(void*) as well. */
+ boolean *vtable_entries_used;
+
+ /* Virtual table derivation info. */
+ struct elf_link_hash_entry *vtable_parent;
+
/* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
char type;
+ /* Symbol st_other value. */
+ unsigned char other;
+
+ /* Hash value of the name computed using the ELF hash function. */
+ unsigned long elf_hash_value;
+
/* Some flags; legal values follow. */
- unsigned char elf_link_hash_flags;
+ unsigned short elf_link_hash_flags;
/* Symbol is referenced by a non-shared object. */
#define ELF_LINK_HASH_REF_REGULAR 01
/* Symbol is defined by a non-shared object. */
#define ELF_LINK_HASH_NEEDS_PLT 0100
/* Symbol appears in a non-ELF input file. */
#define ELF_LINK_NON_ELF 0200
- /* Note: If you add more flags, you must change the type of
- elf_link_hash_flags. */
+ /* Symbol should be marked as hidden in the version information. */
+#define ELF_LINK_HIDDEN 0400
+ /* Symbol was forced to local scope due to a version script file. */
+#define ELF_LINK_FORCED_LOCAL 01000
+ /* Symbol was marked during garbage collection. */
+#define ELF_LINK_HASH_MARK 02000
};
/* ELF linker hash table. */
boolean (*write_shdrs_and_ehdr) PARAMS ((bfd *));
void (*write_relocs) PARAMS ((bfd *, asection *, PTR));
void (*swap_symbol_out) PARAMS ((bfd *, const Elf_Internal_Sym *, PTR));
- boolean (*slurp_reloc_table) PARAMS ((bfd *, asection *, asymbol **));
+ boolean (*slurp_reloc_table)
+ PARAMS ((bfd *, asection *, asymbol **, boolean));
long (*slurp_symbol_table) PARAMS ((bfd *, asymbol **, boolean));
void (*swap_dyn_in) PARAMS ((bfd *, const PTR, Elf_Internal_Dyn *));
};
elf_symbol_type *,
unsigned int));
+ /* A function to set the type of the info field. Processor-specific
+ types should be handled here. */
+ int (*elf_backend_get_symbol_type) PARAMS (( Elf_Internal_Sym *, int));
+
/* A function to do additional processing on the ELF section header
just before writing it out. This is used to set the flags and
type fields for some sections, or to actually write out data for
boolean (*elf_backend_adjust_dynamic_symbol)
PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
+ /* The ALWAYS_SIZE_SECTIONS function is called by the backend linker
+ after all the linker input files have been seen but before the
+ section sizes have been set. This is called after
+ ADJUST_DYNAMIC_SYMBOL, but before SIZE_DYNAMIC_SECTIONS. */
+ boolean (*elf_backend_always_size_sections)
+ PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
+
/* The SIZE_DYNAMIC_SECTIONS function is called by the ELF backend
linker after all the linker input files have been seen but before
the sections sizes have been set. This is called after
backend specific fashion. */
boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *));
+ /* This function is called during section gc to discover the section a
+ particular relocation refers to. It need not be defined for hosts
+ that have no queer relocation types. */
+ asection * (*gc_mark_hook)
+ PARAMS ((bfd *abfd, struct bfd_link_info *, Elf_Internal_Rela *,
+ struct elf_link_hash_entry *h, Elf_Internal_Sym *));
+
+ /* This function, if defined, is called during the sweep phase of gc
+ in order that a backend might update any data structures it might
+ be maintaining. */
+ boolean (*gc_sweep_hook)
+ PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o,
+ const Elf_Internal_Rela *relocs));
+
/* The swapping table to use when dealing with ECOFF information.
Used for the MIPS ELF .mdebug section. */
const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap;
const struct elf_size_info *s;
+ /* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
+ .got section */
+ bfd_vma got_symbol_offset;
+
+ /* The size in bytes of the headers for the GOT and PLT. This includes
+ the so-called reserved entries on some systems. */
+ bfd_vma got_header_size;
+ bfd_vma plt_header_size;
+
unsigned want_got_plt : 1;
unsigned plt_readonly : 1;
unsigned want_plt_sym : 1;
+ unsigned plt_not_loaded : 1;
+ unsigned plt_alignment : 4;
+ unsigned can_gc_sections : 1;
};
/* Information stored for each BFD section in an ELF file. This
bfd_vma max_hole_offset; /* maximum offset for the hole */
elf_linker_section_enum_t which; /* which section this is */
boolean hole_written_p; /* whether the hole has been initialized */
- int alignment; /* alignment for the section */
+ unsigned int alignment; /* alignment for the section */
flagword flags; /* flags to use to create the section */
} elf_linker_section_t;
Elf_Internal_Shdr strtab_hdr;
Elf_Internal_Shdr dynsymtab_hdr;
Elf_Internal_Shdr dynstrtab_hdr;
+ Elf_Internal_Shdr dynversym_hdr;
+ Elf_Internal_Shdr dynverref_hdr;
+ Elf_Internal_Shdr dynverdef_hdr;
unsigned int symtab_section, shstrtab_section;
unsigned int strtab_section, dynsymtab_section;
+ unsigned int dynversym_section, dynverdef_section, dynverref_section;
file_ptr next_file_pos;
+#if 0
+ /* we don't need these inside bfd anymore, and I think
+ these weren't used outside bfd. */
void *prstatus; /* The raw /proc prstatus structure */
void *prpsinfo; /* The raw /proc prpsinfo structure */
+#endif
bfd_vma gp; /* The gp value (MIPS only, for now) */
unsigned int gp_size; /* The gp size (MIPS only, for now) */
+ /* Information grabbed from an elf core file. */
+ int core_signal;
+ int core_pid;
+ int core_lwpid;
+ char* core_program;
+ char* core_command;
+
/* This is set to true if the object was created by the backend
linker. */
boolean linker;
struct elf_link_hash_entry **sym_hashes;
/* A mapping from local symbols to offsets into the global offset
- table, used when linking. This is indexed by the symbol index. */
- bfd_vma *local_got_offsets;
+ table, used when linking. This is indexed by the symbol index.
+ Like for the globals, we use a union and two names primarily to
+ document the intent of any particular piece of code. The field
+ should be used as a count until size_dynamic_sections, at which
+ point the contents of the .got is fixed. Afterward, if an entry
+ is -1, then the symbol does not require a global offset table entry. */
+ union
+ {
+ bfd_signed_vma *refcounts;
+ bfd_vma *offsets;
+ } local_got;
/* A mapping from local symbols to offsets into the various linker
sections added. This is index by the symbol index. */
find_nearest_line. */
struct mips_elf_find_line *find_line_info;
+ /* A place to stash dwarf1 info for this bfd. */
+ struct dwarf1_debug *dwarf1_find_line_info;
+
+ /* A place to stash dwarf2 info for this bfd. */
+ struct dwarf2_debug *dwarf2_find_line_info;
+
+ /* An array of stub sections indexed by symbol number, used by the
+ MIPS ELF linker. FIXME: We should figure out some way to only
+ include this field for a MIPS ELF target. */
+ asection **local_stubs;
+
/* Used to determine if the e_flags field has been initialized */
boolean flags_init;
+ /* Number of symbol version definitions we are about to emit. */
+ unsigned int cverdefs;
+
+ /* Number of symbol version references we are about to emit. */
+ unsigned int cverrefs;
+
+ /* Symbol version definitions in external objects. */
+ Elf_Internal_Verdef *verdef;
+
+ /* Symbol version references to external objects. */
+ Elf_Internal_Verneed *verref;
+
/* Linker sections that we are interested in. */
struct elf_linker_section *linker_section[ (int)LINKER_SECTION_MAX ];
};
#define elf_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr)
#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section)
#define elf_dynsymtab(bfd) (elf_tdata(bfd) -> dynsymtab_section)
+#define elf_dynversym(bfd) (elf_tdata(bfd) -> dynversym_section)
+#define elf_dynverdef(bfd) (elf_tdata(bfd) -> dynverdef_section)
+#define elf_dynverref(bfd) (elf_tdata(bfd) -> dynverref_section)
#define elf_num_locals(bfd) (elf_tdata(bfd) -> num_locals)
#define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals)
#define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms)
#define elf_gp(bfd) (elf_tdata(bfd) -> gp)
#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size)
#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes)
-#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets)
+#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts)
+#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets)
#define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers)
#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name)
#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab)
#define elf_flags_init(bfd) (elf_tdata(bfd) -> flags_init)
#define elf_linker_section(bfd,n) (elf_tdata(bfd) -> linker_section[(int)n])
\f
+extern void _bfd_elf_swap_verdef_in
+ PARAMS ((bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *));
+extern void _bfd_elf_swap_verdef_out
+ PARAMS ((bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *));
+extern void _bfd_elf_swap_verdaux_in
+ PARAMS ((bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *));
+extern void _bfd_elf_swap_verdaux_out
+ PARAMS ((bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *));
+extern void _bfd_elf_swap_verneed_in
+ PARAMS ((bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *));
+extern void _bfd_elf_swap_verneed_out
+ PARAMS ((bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *));
+extern void _bfd_elf_swap_vernaux_in
+ PARAMS ((bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *));
+extern void _bfd_elf_swap_vernaux_out
+ PARAMS ((bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *));
+extern void _bfd_elf_swap_versym_in
+ PARAMS ((bfd *, const Elf_External_Versym *, Elf_Internal_Versym *));
+extern void _bfd_elf_swap_versym_out
+ PARAMS ((bfd *, const Elf_Internal_Versym *, Elf_External_Versym *));
+
extern int _bfd_elf_section_from_bfd_section PARAMS ((bfd *, asection *));
extern char *bfd_elf_string_from_elf_section
PARAMS ((bfd *, unsigned, unsigned));
#define bfd_elf32_print_symbol bfd_elf_print_symbol
#define bfd_elf64_print_symbol bfd_elf_print_symbol
-#define bfd_elf32_mkobject bfd_elf_mkobject
-#define bfd_elf64_mkobject bfd_elf_mkobject
-#define elf_mkobject bfd_elf_mkobject
extern unsigned long bfd_elf_hash PARAMS ((CONST unsigned char *));
bfd *,
char **));
extern boolean bfd_elf_mkobject PARAMS ((bfd *));
+extern boolean bfd_elf_mkcorefile PARAMS ((bfd *));
extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *));
extern boolean _bfd_elf_make_section_from_shdr
PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name));
struct bfd_hash_entry *(*) (struct bfd_hash_entry *,
struct bfd_hash_table *,
const char *)));
+extern boolean _bfd_elf_slurp_version_tables PARAMS ((bfd *));
extern boolean _bfd_elf_copy_private_symbol_data
PARAMS ((bfd *, asymbol *, bfd *, asymbol *));
extern boolean _bfd_elf_copy_private_section_data
PARAMS ((bfd *, asection *, bfd *, asection *));
extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *));
+extern boolean _bfd_elf_write_corefile_contents PARAMS ((bfd *));
extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR,
file_ptr,
bfd_size_type));
extern long _bfd_elf_get_reloc_upper_bound PARAMS ((bfd *, sec_ptr));
extern long _bfd_elf_canonicalize_reloc PARAMS ((bfd *, sec_ptr,
arelent **, asymbol **));
+extern long _bfd_elf_get_dynamic_reloc_upper_bound PARAMS ((bfd *));
+extern long _bfd_elf_canonicalize_dynamic_reloc PARAMS ((bfd *, arelent **,
+ asymbol **));
extern asymbol *_bfd_elf_make_empty_symbol PARAMS ((bfd *));
extern void _bfd_elf_get_symbol_info PARAMS ((bfd *, asymbol *,
symbol_info *));
+extern boolean _bfd_elf_is_local_label_name PARAMS ((bfd *, const char *));
extern alent *_bfd_elf_get_lineno PARAMS ((bfd *, asymbol *));
extern boolean _bfd_elf_set_arch_mach PARAMS ((bfd *, enum bfd_architecture,
unsigned long));
Elf_Internal_Rela *));
extern boolean bfd_section_from_shdr PARAMS ((bfd *, unsigned int shindex));
+extern boolean bfd_section_from_phdr PARAMS ((bfd *, Elf_Internal_Phdr *, int));
extern int _bfd_elf_symbol_from_bfd_symbol PARAMS ((bfd *, asymbol **));
PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
extern boolean bfd_elf32_link_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+extern Elf_Internal_Rela *_bfd_elf32_link_read_relocs
+ PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
extern const bfd_target *bfd_elf64_object_p PARAMS ((bfd *));
extern const bfd_target *bfd_elf64_core_file_p PARAMS ((bfd *));
PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
extern boolean bfd_elf64_link_create_dynamic_sections
PARAMS ((bfd *, struct bfd_link_info *));
+extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs
+ PARAMS ((bfd *, asection *, PTR, Elf_Internal_Rela *, boolean));
#define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
#define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol
+extern boolean _bfd_elf_close_and_cleanup PARAMS ((bfd *));
+extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn
+ PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR,
+ asection *, bfd *, char **));
+
+boolean _bfd_elf32_gc_sections
+ PARAMS ((bfd *abfd, struct bfd_link_info *info));
+boolean _bfd_elf32_gc_common_finalize_got_offsets
+ PARAMS ((bfd *abfd, struct bfd_link_info *info));
+boolean _bfd_elf32_gc_common_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
+boolean _bfd_elf32_gc_record_vtinherit
+ PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
+boolean _bfd_elf32_gc_record_vtentry
+ PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
+
+boolean _bfd_elf64_gc_sections
+ PARAMS ((bfd *abfd, struct bfd_link_info *info));
+boolean _bfd_elf64_gc_common_finalize_got_offsets
+ PARAMS ((bfd *abfd, struct bfd_link_info *info));
+boolean _bfd_elf64_gc_common_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
+boolean _bfd_elf64_gc_record_vtinherit
+ PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
+boolean _bfd_elf64_gc_record_vtentry
+ PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma));
+
/* MIPS ELF specific routines. */
extern boolean _bfd_mips_elf_object_p PARAMS ((bfd *));
extern boolean _bfd_mips_elf_read_ecoff_info
PARAMS ((bfd *, asection *, struct ecoff_debug_info *));
extern void _bfd_mips_elf_final_write_processing PARAMS ((bfd *, boolean));
+extern bfd_reloc_status_type _bfd_mips_elf_hi16_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+extern bfd_reloc_status_type _bfd_mips_elf_lo16_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+extern bfd_reloc_status_type _bfd_mips_elf_gprel16_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+extern bfd_reloc_status_type _bfd_mips_elf_got16_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+extern bfd_reloc_status_type _bfd_mips_elf_gprel32_reloc
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+extern boolean _bfd_mips_elf_set_private_flags PARAMS ((bfd *, flagword));
+extern boolean _bfd_mips_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
+extern boolean _bfd_mips_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
+extern boolean _bfd_mips_elf_find_nearest_line
+ PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **,
+ const char **, unsigned int *));
+extern boolean _bfd_mips_elf_set_section_contents
+ PARAMS ((bfd *, asection *, PTR, file_ptr, bfd_size_type));
#endif /* _LIBELF_H_ */
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