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@ -1,5 +1,5 @@ |
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/* BFD back-end data structures for ELF files.
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Copyright (C) 1992, 93, 94, 95, 96, 1997 Free Software Foundation, Inc. |
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Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. |
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Written by Cygnus Support. |
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This file is part of BFD, the Binary File Descriptor library. |
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@ -96,17 +96,24 @@ struct elf_link_hash_entry |
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struct elf_link_hash_entry *weakdef; |
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/* If this symbol requires an entry in the global offset table, the
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processor specific backend uses this field to hold the offset |
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into the .got section. If this field is -1, then the symbol does |
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not require a global offset table entry. */ |
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bfd_vma got_offset; |
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/* If this symbol requires an entry in the procedure linkage table,
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the processor specific backend uses these two fields to hold the |
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offset into the procedure linkage section and the offset into the |
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.got section. If plt_offset is -1, then the symbol does not |
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require an entry in the procedure linkage table. */ |
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bfd_vma plt_offset; |
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processor specific backend uses this field to track usage and |
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final offset. We use a union and two names primarily to document |
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the intent of any particular piece of code. The field should be |
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used as a count until size_dynamic_sections, at which point the |
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contents of the .got is fixed. Afterward, if this field is -1, |
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then the symbol does not require a global offset table entry. */ |
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union |
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{ |
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bfd_signed_vma refcount; |
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bfd_vma offset; |
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} got; |
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/* Same, but tracks a procedure linkage table entry. */ |
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union |
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{ |
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bfd_signed_vma refcount; |
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bfd_vma offset; |
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} plt; |
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/* If this symbol is used in the linker created sections, the processor
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specific backend uses this field to map the field into the offset |
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@ -126,6 +133,14 @@ struct elf_link_hash_entry |
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struct bfd_elf_version_tree *vertree; |
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} verinfo; |
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/* Virtual table entry use information. This array is of size
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size/sizeof(target_void_pointer), and indexed via |
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offset/sizeof(void*) as well. */ |
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boolean *vtable_entries_used; |
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/* Virtual table derivation info. */ |
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struct elf_link_hash_entry *vtable_parent; |
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/* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ |
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char type; |
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@ -152,6 +167,10 @@ struct elf_link_hash_entry |
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#define ELF_LINK_NON_ELF 0200 |
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/* Symbol should be marked as hidden in the version information. */ |
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#define ELF_LINK_HIDDEN 0400 |
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/* Symbol was forced to local scope due to a version script file. */ |
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#define ELF_LINK_FORCED_LOCAL 01000 |
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/* Symbol was marked during garbage collection. */ |
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#define ELF_LINK_HASH_MARK 02000 |
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}; |
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/* ELF linker hash table. */ |
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@ -471,6 +490,20 @@ struct elf_backend_data |
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backend specific fashion. */ |
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boolean (*elf_backend_modify_segment_map) PARAMS ((bfd *)); |
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/* This function is called during section gc to discover the section a
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particular relocation refers to. It need not be defined for hosts |
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that have no queer relocation types. */ |
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asection * (*gc_mark_hook) |
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PARAMS ((bfd *abfd, struct bfd_link_info *, Elf_Internal_Rela *, |
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struct elf_link_hash_entry *h, Elf_Internal_Sym *)); |
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/* This function, if defined, is called during the sweep phase of gc
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in order that a backend might update any data structures it might |
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be maintaining. */ |
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boolean (*gc_sweep_hook) |
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PARAMS ((bfd *abfd, struct bfd_link_info *info, asection *o, |
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const Elf_Internal_Rela *relocs)); |
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/* The swapping table to use when dealing with ECOFF information.
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Used for the MIPS ELF .mdebug section. */ |
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const struct ecoff_debug_swap *elf_backend_ecoff_debug_swap; |
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@ -481,9 +514,21 @@ struct elf_backend_data |
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const struct elf_size_info *s; |
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/* offset of the _GLOBAL_OFFSET_TABLE_ symbol from the start of the
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.got section */ |
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bfd_vma got_symbol_offset; |
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/* The size in bytes of the headers for the GOT and PLT. This includes
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the so-called reserved entries on some systems. */ |
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bfd_vma got_header_size; |
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bfd_vma plt_header_size; |
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unsigned want_got_plt : 1; |
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unsigned plt_readonly : 1; |
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unsigned want_plt_sym : 1; |
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unsigned plt_not_loaded : 1; |
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unsigned plt_alignment : 4; |
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unsigned can_gc_sections : 1; |
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}; |
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/* Information stored for each BFD section in an ELF file. This
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@ -557,7 +602,7 @@ typedef struct elf_linker_section |
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bfd_vma max_hole_offset; /* maximum offset for the hole */ |
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elf_linker_section_enum_t which; /* which section this is */ |
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boolean hole_written_p; /* whether the hole has been initialized */ |
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int alignment; /* alignment for the section */ |
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unsigned int alignment; /* alignment for the section */ |
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flagword flags; /* flags to use to create the section */ |
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} elf_linker_section_t; |
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@ -613,8 +658,17 @@ struct elf_obj_tdata |
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struct elf_link_hash_entry **sym_hashes; |
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/* A mapping from local symbols to offsets into the global offset
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table, used when linking. This is indexed by the symbol index. */ |
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bfd_vma *local_got_offsets; |
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table, used when linking. This is indexed by the symbol index. |
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Like for the globals, we use a union and two names primarily to |
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document the intent of any particular piece of code. The field |
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should be used as a count until size_dynamic_sections, at which |
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point the contents of the .got is fixed. Afterward, if an entry |
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is -1, then the symbol does not require a global offset table entry. */ |
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union |
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{ |
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bfd_signed_vma *refcounts; |
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bfd_vma *offsets; |
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} local_got; |
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/* A mapping from local symbols to offsets into the various linker
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sections added. This is index by the symbol index. */ |
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@ -649,6 +703,9 @@ struct elf_obj_tdata |
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find_nearest_line. */ |
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struct mips_elf_find_line *find_line_info; |
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/* A place to stash dwarf2 info for this bfd. */ |
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struct dwarf2_debug *dwarf2_find_line_info; |
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/* An array of stub sections indexed by symbol number, used by the
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MIPS ELF linker. FIXME: We should figure out some way to only |
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include this field for a MIPS ELF target. */ |
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@ -658,10 +715,10 @@ struct elf_obj_tdata |
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boolean flags_init; |
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/* Number of symbol version definitions we are about to emit. */ |
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int cverdefs; |
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unsigned int cverdefs; |
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/* Number of symbol version references we are about to emit. */ |
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int cverrefs; |
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unsigned int cverrefs; |
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/* Symbol version definitions in external objects. */ |
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Elf_Internal_Verdef *verdef; |
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@ -690,7 +747,8 @@ struct elf_obj_tdata |
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#define elf_gp(bfd) (elf_tdata(bfd) -> gp) |
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#define elf_gp_size(bfd) (elf_tdata(bfd) -> gp_size) |
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#define elf_sym_hashes(bfd) (elf_tdata(bfd) -> sym_hashes) |
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#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got_offsets) |
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#define elf_local_got_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) |
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#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) |
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#define elf_local_ptr_offsets(bfd) (elf_tdata(bfd) -> linker_section_pointers) |
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#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) |
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#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) |
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@ -742,6 +800,7 @@ extern bfd_reloc_status_type bfd_elf_generic_reloc PARAMS ((bfd *, |
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bfd *, |
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char **)); |
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extern boolean bfd_elf_mkobject PARAMS ((bfd *)); |
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extern boolean bfd_elf_mkcorefile PARAMS ((bfd *)); |
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extern Elf_Internal_Shdr *bfd_elf_find_section PARAMS ((bfd *, char *)); |
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extern boolean _bfd_elf_make_section_from_shdr |
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PARAMS ((bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)); |
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@ -761,6 +820,7 @@ extern boolean _bfd_elf_copy_private_symbol_data |
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extern boolean _bfd_elf_copy_private_section_data |
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PARAMS ((bfd *, asection *, bfd *, asection *)); |
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extern boolean _bfd_elf_write_object_contents PARAMS ((bfd *)); |
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extern boolean _bfd_elf_write_corefile_contents PARAMS ((bfd *)); |
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extern boolean _bfd_elf_set_section_contents PARAMS ((bfd *, sec_ptr, PTR, |
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file_ptr, |
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bfd_size_type)); |
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@ -962,6 +1022,33 @@ extern Elf_Internal_Rela *_bfd_elf64_link_read_relocs |
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#define bfd_elf32_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
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#define bfd_elf64_link_record_dynamic_symbol _bfd_elf_link_record_dynamic_symbol |
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extern boolean _bfd_elf_close_and_cleanup PARAMS ((bfd *)); |
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extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn |
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PARAMS ((bfd *, arelent *, struct symbol_cache_entry *, PTR, |
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asection *, bfd *, char **)); |
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boolean _bfd_elf32_gc_sections |
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PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
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boolean _bfd_elf32_gc_common_finalize_got_offsets |
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PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
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boolean _bfd_elf32_gc_common_final_link |
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PARAMS ((bfd *, struct bfd_link_info *)); |
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boolean _bfd_elf32_gc_record_vtinherit |
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PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma)); |
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boolean _bfd_elf32_gc_record_vtentry |
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PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma)); |
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boolean _bfd_elf64_gc_sections |
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PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
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boolean _bfd_elf64_gc_common_finalize_got_offsets |
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PARAMS ((bfd *abfd, struct bfd_link_info *info)); |
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boolean _bfd_elf64_gc_common_final_link |
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PARAMS ((bfd *, struct bfd_link_info *)); |
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boolean _bfd_elf64_gc_record_vtinherit |
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PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma)); |
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boolean _bfd_elf64_gc_record_vtentry |
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PARAMS ((bfd *, asection *, struct elf_link_hash_entry *, bfd_vma)); |
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/* MIPS ELF specific routines. */ |
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extern boolean _bfd_mips_elf_object_p PARAMS ((bfd *)); |
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Richard Henderson
28 years ago