#include "elf/common.h"
#include "elf/internal.h"
#include "elf/external.h"
+#include "bfdlink.h"
/* If size isn't specified as 64 or 32, NAME macro should fail. */
#ifndef NAME
}
tc_data;
} elf_symbol_type;
+\f
+/* ELF linker hash table entries. */
+struct elf_link_hash_entry
+{
+ struct bfd_link_hash_entry root;
+
+ /* Symbol index in output file. This is initialized to -1. It is
+ set to -2 if the symbol is used by a reloc. */
+ long indx;
+
+ /* Symbol size. */
+ bfd_size_type size;
+
+ /* Symbol alignment (common symbols only). */
+ bfd_size_type align;
+
+ /* Symbol index as a dynamic symbol. Initialized to -1, and remains
+ -1 if this is not a dynamic symbol. */
+ long dynindx;
+
+ /* String table index in .dynstr if this is a dynamic symbol. */
+ unsigned long dynstr_index;
+
+ /* If this is a weak defined symbol from a dynamic object, this
+ field points to a defined symbol with the same value, if there is
+ one. Otherwise it is NULL. */
+ struct elf_link_hash_entry *weakdef;
+
+ /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */
+ char type;
+
+ /* Some flags; legal values follow. */
+ unsigned char 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_DEF_REGULAR 02
+ /* Symbol is referenced by a shared object. */
+#define ELF_LINK_HASH_REF_DYNAMIC 04
+ /* Symbol is defined by a shared object. */
+#define ELF_LINK_HASH_DEF_DYNAMIC 010
+ /* Symbol is referenced by two or more shared objects. */
+#define ELF_LINK_HASH_REF_DYNAMIC_MULTIPLE 020
+ /* Symbol is defined by two or more shared objects. */
+#define ELF_LINK_HASH_DEF_DYNAMIC_MULTIPLE 040
+ /* Dynamic symbol has been adjustd. */
+#define ELF_LINK_HASH_DYNAMIC_ADJUSTED 0100
+};
+
+/* ELF linker hash table. */
+
+struct elf_link_hash_table
+{
+ struct bfd_link_hash_table root;
+ /* The first dynamic object found during a link. We create several
+ special input sections when linking against dynamic objects, and
+ we simply attach them to the first one found. */
+ bfd *dynobj;
+ /* The number of symbols found in the link which must be put into
+ the .dynsym section. */
+ size_t dynsymcount;
+ /* The string table of dynamic symbols, which becomes the .dynstr
+ section. */
+ struct strtab *dynstr;
+ /* The number of buckets in the hash table in the .hash section.
+ This is based on the number of dynamic symbols. */
+ size_t bucketcount;
+};
+
+/* Look up an entry in an ELF linker hash table. */
+
+#define elf_link_hash_lookup(table, string, create, copy, follow) \
+ ((struct elf_link_hash_entry *) \
+ bfd_link_hash_lookup (&(table)->root, (string), (create), \
+ (copy), (follow)))
+
+/* Traverse an ELF linker hash table. */
+
+#define elf_link_hash_traverse(table, func, info) \
+ (bfd_link_hash_traverse \
+ (&(table)->root, \
+ (boolean (*) PARAMS ((struct bfd_link_hash_entry *, PTR))) (func), \
+ (info)))
+
+/* Get the ELF linker hash table from a link_info structure. */
+
+#define elf_hash_table(p) ((struct elf_link_hash_table *) ((p)->hash))
+\f
/* Constant information held for an ELF backend. */
struct elf_backend_data
/* The maximum page size for this backend. */
bfd_vma maxpagesize;
+ /* This is true if the linker should act like collect and gather
+ global constructors and destructors by name. This is true for
+ MIPS ELF because the Irix 5 tools can not handle the .init
+ section. */
+ boolean collect;
+
/* A function to translate an ELF RELA relocation to a BFD arelent
structure. */
void (*elf_info_to_howto) PARAMS ((bfd *, arelent *,
boolean (*elf_backend_section_from_bfd_section)
PARAMS ((bfd *, Elf32_Internal_Shdr *, asection *, int *retval));
+ /* If this field is not NULL, it is called by the add_symbols phase
+ of a link just before adding a symbol to the global linker hash
+ table. It may modify any of the fields as it wishes. If *NAME
+ is set to NULL, the symbol will be skipped rather than being
+ added to the hash table. This function is responsible for
+ handling all processor dependent symbol bindings and section
+ indices, and must set at least *FLAGS and *SEC for each processor
+ dependent case; failure to do so will cause a link error. */
+ boolean (*elf_add_symbol_hook)
+ PARAMS ((bfd *abfd, struct bfd_link_info *info,
+ const Elf_Internal_Sym *, const char **name,
+ flagword *flags, asection **sec, bfd_vma *value));
+
+ /* The CREATE_DYNAMIC_SECTIONS function is called by the ELF backend
+ linker the first time it encounters a dynamic object in the link.
+ This function must create any sections required for dynamic
+ linking. The ABFD argument is a dynamic object. The .interp,
+ .dynamic, .dynsym, .dynstr, and .hash functions have already been
+ created, and this function may modify the section flags if
+ desired. This function will normally create the .got and .plt
+ sections, but different backends have different requirements. */
+ boolean (*elf_backend_create_dynamic_sections)
+ PARAMS ((bfd *abfd, struct bfd_link_info *info));
+
+ /* The ADJUST_DYNAMIC_SYMBOL function is called by the ELF backend
+ linker for every symbol which is defined by a dynamic object and
+ referenced by a regular object. This is called after all the
+ input files have been seen, but before the SIZE_DYNAMIC_SECTIONS
+ function has been called. The hash table entry should be
+ bfd_link_hash_defined, and it should be defined in a section from
+ a dynamic object. Dynamic object sections are not included in
+ the final link, and this function is responsible for changing the
+ value to something which the rest of the link can deal with.
+ This will normally involve adding an entry to the .plt or .got or
+ some such section, and setting the symbol to point to that. */
+ boolean (*elf_backend_adjust_dynamic_symbol)
+ PARAMS ((struct bfd_link_info *info, struct elf_link_hash_entry *h));
+
+ /* 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
+ ADJUST_DYNAMIC_SYMBOL has been called on all appropriate symbols.
+ It is only called when linking against a dynamic object. It must
+ set the sizes of the dynamic sections, and may fill in their
+ contents as well. The generic ELF linker can handle the .dynsym,
+ .dynstr and .hash sections. This function must handle the
+ .interp section and any sections created by the
+ CREATE_DYNAMIC_SECTIONS entry point. */
+ boolean (*elf_backend_size_dynamic_sections)
+ PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
+
+ /* The RELOCATE_SECTION function is called by the ELF backend linker
+ to handle the relocations for a section.
+
+ The relocs are always passed as Rela structures; if the section
+ actually uses Rel structures, the r_addend field will always be
+ zero.
+
+ This function is responsible for adjust the section contents as
+ necessary, and (if using Rela relocs and generating a
+ relocateable output file) adjusting the reloc addend as
+ necessary.
+
+ This function does not have to worry about setting the reloc
+ address or the reloc symbol index.
+
+ LOCAL_SYMS is a pointer to the swapped in local symbols.
+
+ LOCAL_SECTIONS is an array giving the section in the input file
+ corresponding to the st_shndx field of each local symbol.
+
+ The global hash table entry for the global symbols can be found
+ via elf_sym_hashes (input_bfd).
+
+ When generating relocateable output, this function must handle
+ STB_LOCAL/STT_SECTION symbols specially. The output symbol is
+ going to be the section symbol corresponding to the output
+ section, which means that the addend must be adjusted
+ accordingly. */
+ boolean (*elf_backend_relocate_section)
+ PARAMS ((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));
+
+ /* The FINISH_DYNAMIC_SYMBOL function is called by the ELF backend
+ linker just before it writes a symbol out to the .dynsym section.
+ The processor backend may make any required adjustment to the
+ symbol. It may also take the opportunity to set contents of the
+ dynamic sections. Note that FINISH_DYNAMIC_SYMBOL is called on
+ all .dynsym symbols, while ADJUST_DYNAMIC_SYMBOL is only called
+ on those symbols which are defined by a dynamic object. */
+ boolean (*elf_backend_finish_dynamic_symbol)
+ PARAMS ((bfd *output_bfd, struct bfd_link_info *info,
+ struct elf_link_hash_entry *h, Elf_Internal_Sym *sym));
+
+ /* The FINISH_DYNAMIC_SECTIONS function is called by the ELF backend
+ linker just before it writes all the dynamic sections out to the
+ output file. The FINISH_DYNAMIC_SYMBOL will have been called on
+ all dynamic symbols. */
+ boolean (*elf_backend_finish_dynamic_sections)
+ PARAMS ((bfd *output_bfd, struct bfd_link_info *info));
+
/* A function to do any beginning processing needed for the ELF file
before building the ELF headers and computing file positions. */
void (*elf_backend_begin_write_processing) PARAMS ((bfd *));
Elf_Internal_Shdr this_hdr;
Elf_Internal_Shdr rel_hdr;
int this_idx, rel_idx;
+ struct elf_link_hash_entry **rel_hashes;
};
#define elf_section_data(sec) ((struct bfd_elf_section_data*)sec->used_by_bfd)
#define shdr_name(abfd,shdr) (elf_shstrtab (abfd)->tab + (shdr)->sh_name)
struct strtab *strtab_ptr;
int num_locals;
int num_globals;
- Elf_Internal_Sym *internal_syms;
- elf_symbol_type *symbols; /* elf_symbol_type */
Elf_Sym_Extra *sym_extra;
asymbol **section_syms; /* STT_SECTION symbols for each section */
int num_section_syms; /* number of section_syms allocated */
void *prpsinfo; /* The raw /proc prpsinfo structure */
bfd_vma gp; /* The gp value (MIPS only, for now) */
int gp_size; /* The gp size (MIPS only, for now) */
+
+ /* A mapping from external symbols to entries in the linker hash
+ table, used when linking. This is indexed by the symbol index
+ minus the sh_info field of the symbol table header. */
+ struct elf_link_hash_entry **sym_hashes;
};
#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data)
#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> num_section_syms)
#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo)
#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus)
-#define obj_symbols(bfd) (elf_tdata(bfd) -> symbols)
-#define obj_internal_syms(bfd) (elf_tdata(bfd) -> internal_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)
+\f
extern char * elf_string_from_elf_section PARAMS ((bfd *, unsigned, unsigned));
extern char * elf_get_str_section PARAMS ((bfd *, unsigned));
char **));
extern boolean bfd_elf_mkobject 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));
+extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create
+ PARAMS ((bfd *));
extern boolean bfd_elf32_write_object_contents PARAMS ((bfd *));
extern boolean bfd_elf64_write_object_contents PARAMS ((bfd *));
extern int bfd_elf32_sizeof_headers PARAMS ((bfd *, boolean));
extern void bfd_elf32__write_relocs PARAMS ((bfd *, asection *, PTR));
extern boolean bfd_elf32_new_section_hook PARAMS ((bfd *, asection *));
+extern boolean bfd_elf32_bfd_link_add_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+extern boolean bfd_elf32_bfd_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
+
+extern void bfd_elf32_swap_reloc_in
+ PARAMS ((bfd *, Elf32_External_Rel *, Elf_Internal_Rel *));
+extern void bfd_elf32_swap_reloc_out
+ PARAMS ((bfd *, Elf_Internal_Rel *, Elf32_External_Rel *));
+extern void bfd_elf32_swap_reloca_in
+ PARAMS ((bfd *, Elf32_External_Rela *, Elf_Internal_Rela *));
+extern void bfd_elf32_swap_reloca_out
+ PARAMS ((bfd *, Elf_Internal_Rela *, Elf32_External_Rela *));
+extern void bfd_elf32_swap_dyn_in
+ PARAMS ((bfd *, const Elf32_External_Dyn *, Elf_Internal_Dyn *));
+extern void bfd_elf32_swap_dyn_out
+ PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf32_External_Dyn *));
+extern boolean bfd_elf32_add_dynamic_entry
+ PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
/* If the target doesn't have reloc handling written yet: */
extern void bfd_elf32_no_info_to_howto PARAMS ((bfd *, arelent *,
extern int bfd_elf64_sizeof_headers PARAMS ((bfd *, boolean));
extern void bfd_elf64__write_relocs PARAMS ((bfd *, asection *, PTR));
extern boolean bfd_elf64_new_section_hook PARAMS ((bfd *, asection *));
+extern boolean bfd_elf64_bfd_link_add_symbols
+ PARAMS ((bfd *, struct bfd_link_info *));
+extern boolean bfd_elf64_bfd_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
+
+extern void bfd_elf64_swap_reloc_in
+ PARAMS ((bfd *, Elf64_External_Rel *, Elf_Internal_Rel *));
+extern void bfd_elf64_swap_reloc_out
+ PARAMS ((bfd *, Elf_Internal_Rel *, Elf64_External_Rel *));
+extern void bfd_elf64_swap_reloca_in
+ PARAMS ((bfd *, Elf64_External_Rela *, Elf_Internal_Rela *));
+extern void bfd_elf64_swap_reloca_out
+ PARAMS ((bfd *, Elf_Internal_Rela *, Elf64_External_Rela *));
+extern void bfd_elf64_swap_dyn_in
+ PARAMS ((bfd *, const Elf64_External_Dyn *, Elf_Internal_Dyn *));
+extern void bfd_elf64_swap_dyn_out
+ PARAMS ((bfd *, const Elf_Internal_Dyn *, Elf64_External_Dyn *));
+extern boolean bfd_elf64_add_dynamic_entry
+ PARAMS ((struct bfd_link_info *, bfd_vma, bfd_vma));
/* If the target doesn't have reloc handling written yet: */
extern void bfd_elf64_no_info_to_howto PARAMS ((bfd *, arelent *,