diff options
Diffstat (limited to 'bfd/elf64-x86-64.c')
| -rw-r--r-- | bfd/elf64-x86-64.c | 242 |
1 files changed, 67 insertions, 175 deletions
diff --git a/bfd/elf64-x86-64.c b/bfd/elf64-x86-64.c index 76af7df..7286627 100644 --- a/bfd/elf64-x86-64.c +++ b/bfd/elf64-x86-64.c @@ -150,72 +150,14 @@ static const struct elf_reloc_map x86_64_reloc_map[] = { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, }; -static reloc_howto_type *elf64_x86_64_reloc_type_lookup - PARAMS ((bfd *, bfd_reloc_code_real_type)); -static void elf64_x86_64_info_to_howto - PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); -static bfd_boolean elf64_x86_64_grok_prstatus - PARAMS ((bfd *, Elf_Internal_Note *)); -static bfd_boolean elf64_x86_64_grok_psinfo - PARAMS ((bfd *, Elf_Internal_Note *)); -static struct bfd_link_hash_table *elf64_x86_64_link_hash_table_create - PARAMS ((bfd *)); -static int elf64_x86_64_tls_transition - PARAMS ((struct bfd_link_info *, int, int)); -static bfd_boolean elf64_x86_64_mkobject - PARAMS((bfd *)); -static bfd_boolean elf64_x86_64_elf_object_p PARAMS ((bfd *abfd)); -static bfd_boolean create_got_section - PARAMS((bfd *, struct bfd_link_info *)); -static bfd_boolean elf64_x86_64_create_dynamic_sections - PARAMS((bfd *, struct bfd_link_info *)); -static void elf64_x86_64_copy_indirect_symbol - PARAMS ((struct elf_backend_data *, struct elf_link_hash_entry *, - struct elf_link_hash_entry *)); -static bfd_boolean elf64_x86_64_check_relocs - PARAMS ((bfd *, struct bfd_link_info *, asection *sec, - const Elf_Internal_Rela *)); -static asection *elf64_x86_64_gc_mark_hook - PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, - struct elf_link_hash_entry *, Elf_Internal_Sym *)); - -static bfd_boolean elf64_x86_64_gc_sweep_hook - PARAMS ((bfd *, struct bfd_link_info *, asection *, - const Elf_Internal_Rela *)); - -static struct bfd_hash_entry *link_hash_newfunc - PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); -static bfd_boolean elf64_x86_64_adjust_dynamic_symbol - PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); - -static bfd_boolean allocate_dynrelocs - PARAMS ((struct elf_link_hash_entry *, PTR)); -static bfd_boolean readonly_dynrelocs - PARAMS ((struct elf_link_hash_entry *, PTR)); -static bfd_boolean elf64_x86_64_size_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static bfd_vma dtpoff_base - PARAMS ((struct bfd_link_info *)); -static bfd_vma tpoff - PARAMS ((struct bfd_link_info *, bfd_vma)); -static bfd_boolean elf64_x86_64_relocate_section - PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, - Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); -static bfd_boolean elf64_x86_64_finish_dynamic_symbol - PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, - Elf_Internal_Sym *sym)); -static bfd_boolean elf64_x86_64_finish_dynamic_sections - PARAMS ((bfd *, struct bfd_link_info *)); -static enum elf_reloc_type_class elf64_x86_64_reloc_type_class - PARAMS ((const Elf_Internal_Rela *)); /* Given a BFD reloc type, return a HOWTO structure. */ static reloc_howto_type * -elf64_x86_64_reloc_type_lookup (abfd, code) - bfd *abfd ATTRIBUTE_UNUSED; - bfd_reloc_code_real_type code; +elf64_x86_64_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, + bfd_reloc_code_real_type code) { unsigned int i; + for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); i++) { @@ -228,10 +170,8 @@ elf64_x86_64_reloc_type_lookup (abfd, code) /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ static void -elf64_x86_64_info_to_howto (abfd, cache_ptr, dst) - bfd *abfd ATTRIBUTE_UNUSED; - arelent *cache_ptr; - Elf_Internal_Rela *dst; +elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, + Elf_Internal_Rela *dst) { unsigned r_type, i; @@ -252,9 +192,7 @@ elf64_x86_64_info_to_howto (abfd, cache_ptr, dst) /* Support for core dump NOTE sections. */ static bfd_boolean -elf64_x86_64_grok_prstatus (abfd, note) - bfd *abfd; - Elf_Internal_Note *note; +elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) { int offset; size_t raw_size; @@ -286,9 +224,7 @@ elf64_x86_64_grok_prstatus (abfd, note) } static bfd_boolean -elf64_x86_64_grok_psinfo (abfd, note) - bfd *abfd; - Elf_Internal_Note *note; +elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) { switch (note->descsz) { @@ -447,10 +383,8 @@ struct elf64_x86_64_link_hash_table /* Create an entry in an x86-64 ELF linker hash table. */ static struct bfd_hash_entry * -link_hash_newfunc (entry, table, string) - struct bfd_hash_entry *entry; - struct bfd_hash_table *table; - const char *string; +link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, + const char *string) { /* Allocate the structure if it has not already been allocated by a subclass. */ @@ -479,8 +413,7 @@ link_hash_newfunc (entry, table, string) /* Create an X86-64 ELF linker hash table. */ static struct bfd_link_hash_table * -elf64_x86_64_link_hash_table_create (abfd) - bfd *abfd; +elf64_x86_64_link_hash_table_create (bfd *abfd) { struct elf64_x86_64_link_hash_table *ret; bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); @@ -512,9 +445,7 @@ elf64_x86_64_link_hash_table_create (abfd) shortcuts to them in our hash table. */ static bfd_boolean -create_got_section (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; +create_got_section (bfd *dynobj, struct bfd_link_info *info) { struct elf64_x86_64_link_hash_table *htab; @@ -543,9 +474,7 @@ create_got_section (dynobj, info) hash table. */ static bfd_boolean -elf64_x86_64_create_dynamic_sections (dynobj, info) - bfd *dynobj; - struct bfd_link_info *info; +elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) { struct elf64_x86_64_link_hash_table *htab; @@ -572,9 +501,9 @@ elf64_x86_64_create_dynamic_sections (dynobj, info) /* Copy the extra info we tack onto an elf_link_hash_entry. */ static void -elf64_x86_64_copy_indirect_symbol (bed, dir, ind) - struct elf_backend_data *bed; - struct elf_link_hash_entry *dir, *ind; +elf64_x86_64_copy_indirect_symbol (struct elf_backend_data *bed, + struct elf_link_hash_entry *dir, + struct elf_link_hash_entry *ind) { struct elf64_x86_64_link_hash_entry *edir, *eind; @@ -637,8 +566,7 @@ elf64_x86_64_copy_indirect_symbol (bed, dir, ind) } static bfd_boolean -elf64_x86_64_mkobject (abfd) - bfd *abfd; +elf64_x86_64_mkobject (bfd *abfd) { bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); abfd->tdata.any = bfd_zalloc (abfd, amt); @@ -648,8 +576,7 @@ elf64_x86_64_mkobject (abfd) } static bfd_boolean -elf64_x86_64_elf_object_p (abfd) - bfd *abfd; +elf64_x86_64_elf_object_p (bfd *abfd) { /* Allocate our special target data. */ struct elf64_x86_64_obj_tdata *new_tdata; @@ -665,10 +592,7 @@ elf64_x86_64_elf_object_p (abfd) } static int -elf64_x86_64_tls_transition (info, r_type, is_local) - struct bfd_link_info *info; - int r_type; - int is_local; +elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, int is_local) { if (info->shared) return r_type; @@ -692,11 +616,8 @@ elf64_x86_64_tls_transition (info, r_type, is_local) linkage table, and dynamic reloc sections. */ static bfd_boolean -elf64_x86_64_check_relocs (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; +elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, + const Elf_Internal_Rela *relocs) { struct elf64_x86_64_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; @@ -1060,12 +981,11 @@ elf64_x86_64_check_relocs (abfd, info, sec, relocs) relocation. */ static asection * -elf64_x86_64_gc_mark_hook (sec, info, rel, h, sym) - asection *sec; - struct bfd_link_info *info ATTRIBUTE_UNUSED; - Elf_Internal_Rela *rel; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +elf64_x86_64_gc_mark_hook (asection *sec, + struct bfd_link_info *info ATTRIBUTE_UNUSED, + Elf_Internal_Rela *rel, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) { if (h != NULL) { @@ -1099,11 +1019,8 @@ elf64_x86_64_gc_mark_hook (sec, info, rel, h, sym) /* Update the got entry reference counts for the section being removed. */ static bfd_boolean -elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) - bfd *abfd; - struct bfd_link_info *info; - asection *sec; - const Elf_Internal_Rela *relocs; +elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, + asection *sec, const Elf_Internal_Rela *relocs) { Elf_Internal_Shdr *symtab_hdr; struct elf_link_hash_entry **sym_hashes; @@ -1202,9 +1119,8 @@ elf64_x86_64_gc_sweep_hook (abfd, info, sec, relocs) understand. */ static bfd_boolean -elf64_x86_64_adjust_dynamic_symbol (info, h) - struct bfd_link_info *info; - struct elf_link_hash_entry *h; +elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, + struct elf_link_hash_entry *h) { struct elf64_x86_64_link_hash_table *htab; asection *s; @@ -1217,11 +1133,9 @@ elf64_x86_64_adjust_dynamic_symbol (info, h) || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) { if (h->plt.refcount <= 0 - || (! info->shared - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0 - && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0 - && h->root.type != bfd_link_hash_undefweak - && h->root.type != bfd_link_hash_undefined)) + || SYMBOL_CALLS_LOCAL (info, h) + || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT + && h->root.type == bfd_link_hash_undefweak)) { /* This case can occur if we saw a PLT32 reloc in an input file, but the symbol was never referred to by a dynamic @@ -1355,9 +1269,9 @@ elf64_x86_64_adjust_dynamic_symbol (info, h) will be called from elflink.h. If elflink.h doesn't call our finish_dynamic_symbol routine, we'll need to do something about initializing any .plt and .got entries in elf64_x86_64_relocate_section. */ -#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, INFO, H) \ +#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ ((DYN) \ - && ((INFO)->shared \ + && ((SHARED) \ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ && ((H)->dynindx != -1 \ || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) @@ -1366,9 +1280,7 @@ elf64_x86_64_adjust_dynamic_symbol (info, h) dynamic relocs. */ static bfd_boolean -allocate_dynrelocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; +allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) { struct bfd_link_info *info; struct elf64_x86_64_link_hash_table *htab; @@ -1385,9 +1297,7 @@ allocate_dynrelocs (h, inf) htab = elf64_x86_64_hash_table (info); if (htab->elf.dynamic_sections_created - && h->plt.refcount > 0 - && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT - || h->root.type != bfd_link_hash_undefweak)) + && h->plt.refcount > 0) { /* Make sure this symbol is output as a dynamic symbol. Undefined weak syms won't yet be marked as dynamic. */ @@ -1398,7 +1308,8 @@ allocate_dynrelocs (h, inf) return FALSE; } - if (WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, info, h)) + if (info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) { asection *s = htab->splt; @@ -1482,7 +1393,8 @@ allocate_dynrelocs (h, inf) htab->srelgot->_raw_size += 2 * sizeof (Elf64_External_Rela); else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT || h->root.type != bfd_link_hash_undefweak) - && WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h)) + && (info->shared + || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) htab->srelgot->_raw_size += sizeof (Elf64_External_Rela); } else @@ -1500,9 +1412,13 @@ allocate_dynrelocs (h, inf) if (info->shared) { - if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) != 0 - && ((h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0 - || info->symbolic)) + /* Relocs that use pc_count are those that appear on a call + insn, or certain REL relocs that can generated via assembly. + We want calls to protected symbols to resolve directly to the + function rather than going via the plt. If people want + function pointer comparisons to work as expected then they + should avoid writing weird assembly. */ + if (SYMBOL_CALLS_LOCAL (info, h)) { struct elf64_x86_64_dyn_relocs **pp; @@ -1569,9 +1485,7 @@ allocate_dynrelocs (h, inf) /* Find any dynamic relocs that apply to read-only sections. */ static bfd_boolean -readonly_dynrelocs (h, inf) - struct elf_link_hash_entry *h; - PTR inf; +readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) { struct elf64_x86_64_link_hash_entry *eh; struct elf64_x86_64_dyn_relocs *p; @@ -1600,9 +1514,8 @@ readonly_dynrelocs (h, inf) /* Set the sizes of the dynamic sections. */ static bfd_boolean -elf64_x86_64_size_dynamic_sections (output_bfd, info) - bfd *output_bfd ATTRIBUTE_UNUSED; - struct bfd_link_info *info; +elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, + struct bfd_link_info *info) { struct elf64_x86_64_link_hash_table *htab; bfd *dynobj; @@ -1824,8 +1737,7 @@ elf64_x86_64_size_dynamic_sections (output_bfd, info) This is PT_TLS segment p_vaddr. */ static bfd_vma -dtpoff_base (info) - struct bfd_link_info *info; +dtpoff_base (struct bfd_link_info *info) { /* If tls_segment is NULL, we should have signalled an error already. */ if (elf_hash_table (info)->tls_segment == NULL) @@ -1837,9 +1749,7 @@ dtpoff_base (info) if STT_TLS virtual address is ADDRESS. */ static bfd_vma -tpoff (info, address) - struct bfd_link_info *info; - bfd_vma address; +tpoff (struct bfd_link_info *info, bfd_vma address) { struct elf_link_tls_segment *tls_segment = elf_hash_table (info)->tls_segment; @@ -1854,16 +1764,11 @@ tpoff (info, address) /* Relocate an x86_64 ELF section. */ static bfd_boolean -elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, - contents, relocs, local_syms, local_sections) - 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; +elf64_x86_64_relocate_section (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) { struct elf64_x86_64_link_hash_table *htab; Elf_Internal_Shdr *symtab_hdr; @@ -1981,12 +1886,9 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, off = h->got.offset; dyn = htab->elf.dynamic_sections_created; - if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info, h) + if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) || (info->shared - && (info->symbolic - || h->dynindx == -1 - || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + && SYMBOL_REFERENCES_LOCAL (info, h)) || (ELF_ST_VISIBILITY (h->other) && h->root.type == bfd_link_hash_undefweak)) { @@ -2114,10 +2016,7 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, && r_type != R_X86_64_PC16 && r_type != R_X86_64_PC32) || (h != NULL - && h->dynindx != -1 - && (! info->symbolic - || (h->elf_link_hash_flags - & ELF_LINK_HASH_DEF_REGULAR) == 0)))) + && !SYMBOL_CALLS_LOCAL (info, h)))) || (ELIMINATE_COPY_RELOCS && !info->shared && h != NULL @@ -2604,11 +2503,10 @@ elf64_x86_64_relocate_section (output_bfd, info, input_bfd, input_section, dynamic sections here. */ static bfd_boolean -elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) - bfd *output_bfd; - struct bfd_link_info *info; - struct elf_link_hash_entry *h; - Elf_Internal_Sym *sym; +elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, + struct bfd_link_info *info, + struct elf_link_hash_entry *h, + Elf_Internal_Sym *sym) { struct elf64_x86_64_link_hash_table *htab; @@ -2714,10 +2612,7 @@ elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) The entry in the global offset table will already have been initialized in the relocate_section function. */ if (info->shared - && (info->symbolic - || h->dynindx == -1 - || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL)) - && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)) + && SYMBOL_REFERENCES_LOCAL (info, h)) { BFD_ASSERT((h->got.offset & 1) != 0); rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); @@ -2774,8 +2669,7 @@ elf64_x86_64_finish_dynamic_symbol (output_bfd, info, h, sym) dynamic linker, before writing them out. */ static enum elf_reloc_type_class -elf64_x86_64_reloc_type_class (rela) - const Elf_Internal_Rela *rela; +elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) { switch ((int) ELF64_R_TYPE (rela->r_info)) { @@ -2793,9 +2687,7 @@ elf64_x86_64_reloc_type_class (rela) /* Finish up the dynamic sections. */ static bfd_boolean -elf64_x86_64_finish_dynamic_sections (output_bfd, info) - bfd *output_bfd; - struct bfd_link_info *info; +elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) { struct elf64_x86_64_link_hash_table *htab; bfd *dynobj; |