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Diffstat (limited to 'binutils-2.25/bfd/elf-bfd.h')
| -rw-r--r-- | binutils-2.25/bfd/elf-bfd.h | 2530 |
1 files changed, 2530 insertions, 0 deletions
diff --git a/binutils-2.25/bfd/elf-bfd.h b/binutils-2.25/bfd/elf-bfd.h new file mode 100644 index 00000000..add80b3c --- /dev/null +++ b/binutils-2.25/bfd/elf-bfd.h @@ -0,0 +1,2530 @@ +/* BFD back-end data structures for ELF files. + Copyright 1992-2013 Free Software Foundation, Inc. + Written by Cygnus Support. + + This file is part of BFD, the Binary File Descriptor library. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ + +#ifndef _LIBELF_H_ +#define _LIBELF_H_ 1 + +#include "elf/common.h" +#include "elf/external.h" +#include "elf/internal.h" +#include "bfdlink.h" + +/* The number of entries in a section is its size divided by the size + of a single entry. This is normally only applicable to reloc and + symbol table sections. + PR 9934: It is possible to have relocations that do not refer to + symbols, thus it is also possible to have a relocation section in + an object file, but no symbol table. */ +#define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_entsize > 0 ? (shdr)->sh_size / (shdr)->sh_entsize : 0) + +/* If size isn't specified as 64 or 32, NAME macro should fail. */ +#ifndef NAME +#if ARCH_SIZE == 64 +#define NAME(x, y) x ## 64 ## _ ## y +#endif +#if ARCH_SIZE == 32 +#define NAME(x, y) x ## 32 ## _ ## y +#endif +#endif + +#ifndef NAME +#define NAME(x, y) x ## NOSIZE ## _ ## y +#endif + +#define ElfNAME(X) NAME(Elf,X) +#define elfNAME(X) NAME(elf,X) + +/* Information held for an ELF symbol. The first field is the + corresponding asymbol. Every symbol is an ELF file is actually a + pointer to this structure, although it is often handled as a + pointer to an asymbol. */ + +typedef struct +{ + /* The BFD symbol. */ + asymbol symbol; + /* ELF symbol information. */ + Elf_Internal_Sym internal_elf_sym; + /* Backend specific information. */ + union + { + unsigned int hppa_arg_reloc; + void *mips_extr; + void *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; + +struct elf_strtab_hash; +struct got_entry; +struct plt_entry; + +union gotplt_union + { + bfd_signed_vma refcount; + bfd_vma offset; + struct got_entry *glist; + struct plt_entry *plist; + }; + +struct elf_link_virtual_table_entry + { + /* Virtual table entry use information. This array is nominally of size + size/sizeof(target_void_pointer), though we have to be able to assume + and track a size while the symbol is still undefined. It is indexed + via offset/sizeof(target_void_pointer). */ + size_t size; + bfd_boolean *used; + + /* Virtual table derivation info. */ + struct elf_link_hash_entry *parent; + }; + +/* 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 index as a dynamic symbol. Initialized to -1, and remains + -1 if this is not a dynamic symbol. */ + /* ??? Note that this is consistently used as a synonym for tests + against whether we can perform various simplifying transformations + to the code. (E.g. changing a pc-relative jump to a PLT entry + into a pc-relative jump to the target function.) That test, which + is often relatively complex, and someplaces wrong or incomplete, + should really be replaced by a predicate in elflink.c. + + End result: this field -1 does not indicate that the symbol is + not in the dynamic symbol table, but rather that the symbol is + not visible outside this DSO. */ + long dynindx; + + /* If this symbol requires an entry in the global offset table, the + processor specific backend uses this field to track usage and + final offset. Two schemes are supported: The first assumes that + a symbol may only have one GOT entry, and uses REFCOUNT until + size_dynamic_sections, at which point the contents of the .got is + fixed. Afterward, if OFFSET is -1, then the symbol does not + require a global offset table entry. The second scheme allows + multiple GOT entries per symbol, managed via a linked list + pointed to by GLIST. */ + union gotplt_union got; + + /* Same, but tracks a procedure linkage table entry. */ + union gotplt_union plt; + + /* Symbol size. */ + bfd_size_type size; + + /* Symbol type (STT_NOTYPE, STT_OBJECT, etc.). */ + unsigned int type : 8; + + /* Symbol st_other value, symbol visibility. */ + unsigned int other : 8; + + /* The symbol's st_target_internal value (see Elf_Internal_Sym). */ + unsigned int target_internal : 8; + + /* Symbol is referenced by a non-shared object (other than the object + in which it is defined). */ + unsigned int ref_regular : 1; + /* Symbol is defined by a non-shared object. */ + unsigned int def_regular : 1; + /* Symbol is referenced by a shared object. */ + unsigned int ref_dynamic : 1; + /* Symbol is defined by a shared object. */ + unsigned int def_dynamic : 1; + /* Symbol has a non-weak reference from a non-shared object (other than + the object in which it is defined). */ + unsigned int ref_regular_nonweak : 1; + /* Dynamic symbol has been adjustd. */ + unsigned int dynamic_adjusted : 1; + /* Symbol needs a copy reloc. */ + unsigned int needs_copy : 1; + /* Symbol needs a procedure linkage table entry. */ + unsigned int needs_plt : 1; + /* Symbol appears in a non-ELF input file. */ + unsigned int non_elf : 1; + /* Symbol should be marked as hidden in the version information. */ + unsigned int hidden : 1; + /* Symbol was forced to local scope due to a version script file. */ + unsigned int forced_local : 1; + /* Symbol was forced to be dynamic due to a version script file. */ + unsigned int dynamic : 1; + /* Symbol was marked during garbage collection. */ + unsigned int mark : 1; + /* Symbol is referenced by a non-GOT/non-PLT relocation. This is + not currently set by all the backends. */ + unsigned int non_got_ref : 1; + /* Symbol has a definition in a shared object. + FIXME: There is no real need for this field if def_dynamic is never + cleared and all places that test def_dynamic also test def_regular. */ + unsigned int dynamic_def : 1; + /* Symbol has a non-weak reference from a shared object. */ + unsigned int ref_dynamic_nonweak : 1; + /* Symbol is referenced with a relocation where C/C++ pointer equality + matters. */ + unsigned int pointer_equality_needed : 1; + /* Symbol is a unique global symbol. */ + unsigned int unique_global : 1; + + /* String table index in .dynstr if this is a dynamic symbol. */ + unsigned long dynstr_index; + + union + { + /* 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; + + /* Hash value of the name computed using the ELF hash function. + Used part way through size_dynamic_sections, after we've finished + with weakdefs. */ + unsigned long elf_hash_value; + } u; + + /* 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; + + struct elf_link_virtual_table_entry *vtable; +}; + +/* Will references to this symbol always reference the symbol + in this object? */ +#define SYMBOL_REFERENCES_LOCAL(INFO, H) \ + _bfd_elf_symbol_refs_local_p (H, INFO, 0) + +/* Will _calls_ to this symbol always call the version in this object? */ +#define SYMBOL_CALLS_LOCAL(INFO, H) \ + _bfd_elf_symbol_refs_local_p (H, INFO, 1) + +/* Common symbols that are turned into definitions don't have the + DEF_REGULAR flag set, so they might appear to be undefined. */ +#define ELF_COMMON_DEF_P(H) \ + (!(H)->def_regular \ + && !(H)->def_dynamic \ + && (H)->root.type == bfd_link_hash_defined) + +/* Records local symbols to be emitted in the dynamic symbol table. */ + +struct elf_link_local_dynamic_entry +{ + struct elf_link_local_dynamic_entry *next; + + /* The input bfd this symbol came from. */ + bfd *input_bfd; + + /* The index of the local symbol being copied. */ + long input_indx; + + /* The index in the outgoing dynamic symbol table. */ + long dynindx; + + /* A copy of the input symbol. */ + Elf_Internal_Sym isym; +}; + +struct elf_link_loaded_list +{ + struct elf_link_loaded_list *next; + bfd *abfd; +}; + +/* Structures used by the eh_frame optimization code. */ +struct eh_cie_fde +{ + union { + struct { + /* If REMOVED == 1, this is the CIE that the FDE originally used. + The CIE belongs to the same .eh_frame input section as the FDE. + + If REMOVED == 0, this is the CIE that we have chosen to use for + the output FDE. The CIE's REMOVED field is also 0, but the CIE + might belong to a different .eh_frame input section from the FDE. */ + struct eh_cie_fde *cie_inf; + struct eh_cie_fde *next_for_section; + } fde; + struct { + /* CIEs have three states: + + - REMOVED && !MERGED: Slated for removal because we haven't yet + proven that an FDE needs it. FULL_CIE, if nonnull, points to + more detailed information about the CIE. + + - REMOVED && MERGED: We have merged this CIE with MERGED_WITH, + which may not belong to the same input section. + + - !REMOVED: We have decided to keep this CIE. SEC is the + .eh_frame input section that contains the CIE. */ + union { + struct cie *full_cie; + struct eh_cie_fde *merged_with; + asection *sec; + } u; + + /* The offset of the personality data from the start of the CIE, + or 0 if the CIE doesn't have any. */ + unsigned int personality_offset : 8; + + /* True if we have marked relocations associated with this CIE. */ + unsigned int gc_mark : 1; + + /* True if we have decided to turn an absolute LSDA encoding into + a PC-relative one. */ + unsigned int make_lsda_relative : 1; + + /* True if we have decided to turn an absolute personality + encoding into a PC-relative one. */ + unsigned int make_per_encoding_relative : 1; + + /* True if the CIE contains personality data and if that + data uses a PC-relative encoding. Always true when + make_per_encoding_relative is. */ + unsigned int per_encoding_relative : 1; + + /* True if we need to add an 'R' (FDE encoding) entry to the + CIE's augmentation data. */ + unsigned int add_fde_encoding : 1; + + /* True if we have merged this CIE with another. */ + unsigned int merged : 1; + + /* Unused bits. */ + unsigned int pad1 : 18; + } cie; + } u; + unsigned int reloc_index; + unsigned int size; + unsigned int offset; + unsigned int new_offset; + unsigned int fde_encoding : 8; + unsigned int lsda_encoding : 8; + unsigned int lsda_offset : 8; + + /* True if this entry represents a CIE, false if it represents an FDE. */ + unsigned int cie : 1; + + /* True if this entry is currently marked for removal. */ + unsigned int removed : 1; + + /* True if we need to add a 'z' (augmentation size) entry to the CIE's + augmentation data, and an associated byte to each of the CIE's FDEs. */ + unsigned int add_augmentation_size : 1; + + /* True if we have decided to convert absolute FDE relocations into + relative ones. This applies to the first relocation in the FDE, + which is against the code that the FDE describes. */ + unsigned int make_relative : 1; + + /* Unused bits. */ + unsigned int pad1 : 4; + + unsigned int *set_loc; +}; + +struct eh_frame_sec_info +{ + unsigned int count; + struct cie *cies; + struct eh_cie_fde entry[1]; +}; + +struct eh_frame_array_ent +{ + bfd_vma initial_loc; + bfd_vma fde; +}; + +struct htab; + +struct eh_frame_hdr_info +{ + struct htab *cies; + asection *hdr_sec; + unsigned int fde_count, array_count; + struct eh_frame_array_ent *array; + /* TRUE if we should try to merge CIEs between input sections. */ + bfd_boolean merge_cies; + /* TRUE if all .eh_frames have been parsd. */ + bfd_boolean parsed_eh_frames; + /* TRUE if .eh_frame_hdr should contain the sorted search table. + We build it if we successfully read all .eh_frame input sections + and recognize them. */ + bfd_boolean table; +}; + +/* Enum used to identify target specific extensions to the elf_obj_tdata + and elf_link_hash_table structures. Note the enums deliberately start + from 1 so that we can detect an uninitialized field. The generic value + is last so that additions to this enum do not need to modify more than + one line. */ +enum elf_target_id +{ + AARCH64_ELF_DATA = 1, + ALPHA_ELF_DATA, + ARM_ELF_DATA, + AVR_ELF_DATA, + BFIN_ELF_DATA, + CRIS_ELF_DATA, + FRV_ELF_DATA, + HPPA32_ELF_DATA, + HPPA64_ELF_DATA, + I386_ELF_DATA, + IA64_ELF_DATA, + LM32_ELF_DATA, + M32R_ELF_DATA, + M68HC11_ELF_DATA, + M68K_ELF_DATA, + METAG_ELF_DATA, + MICROBLAZE_ELF_DATA, + MIPS_ELF_DATA, + MN10300_ELF_DATA, + NIOS2_ELF_DATA, + PPC32_ELF_DATA, + PPC64_ELF_DATA, + S390_ELF_DATA, + SH_ELF_DATA, + SPARC_ELF_DATA, + SPU_ELF_DATA, + TIC6X_ELF_DATA, + X86_64_ELF_DATA, + XTENSA_ELF_DATA, + XGATE_ELF_DATA, + TILEGX_ELF_DATA, + TILEPRO_ELF_DATA, + GENERIC_ELF_DATA +}; + +/* ELF linker hash table. */ + +struct elf_link_hash_table +{ + struct bfd_link_hash_table root; + + /* An identifier used to distinguish different target + specific extensions to this structure. */ + enum elf_target_id hash_table_id; + + /* Whether we have created the special dynamic sections required + when linking against or generating a shared object. */ + bfd_boolean dynamic_sections_created; + + /* True if this target has relocatable executables, so needs dynamic + section symbols. */ + bfd_boolean is_relocatable_executable; + + /* The BFD used to hold special sections created by the linker. + This will be the first BFD found which requires these sections to + be created. */ + bfd *dynobj; + + /* The value to use when initialising got.refcount/offset and + plt.refcount/offset in an elf_link_hash_entry. Set to zero when + the values are refcounts. Set to init_got_offset/init_plt_offset + in size_dynamic_sections when the values may be offsets. */ + union gotplt_union init_got_refcount; + union gotplt_union init_plt_refcount; + + /* The value to use for got.refcount/offset and plt.refcount/offset + when the values may be offsets. Normally (bfd_vma) -1. */ + union gotplt_union init_got_offset; + union gotplt_union init_plt_offset; + + /* The number of symbols found in the link which must be put into + the .dynsym section. */ + bfd_size_type dynsymcount; + + /* The string table of dynamic symbols, which becomes the .dynstr + section. */ + struct elf_strtab_hash *dynstr; + + /* The number of buckets in the hash table in the .hash section. + This is based on the number of dynamic symbols. */ + bfd_size_type bucketcount; + + /* A linked list of DT_NEEDED names found in dynamic objects + included in the link. */ + struct bfd_link_needed_list *needed; + + /* Sections in the output bfd that provides a section symbol + to be used by relocations emitted against local symbols. + Most targets will not use data_index_section. */ + asection *text_index_section; + asection *data_index_section; + + /* The _GLOBAL_OFFSET_TABLE_ symbol. */ + struct elf_link_hash_entry *hgot; + + /* The _PROCEDURE_LINKAGE_TABLE_ symbol. */ + struct elf_link_hash_entry *hplt; + + /* The _DYNAMIC symbol. */ + struct elf_link_hash_entry *hdynamic; + + /* A pointer to information used to merge SEC_MERGE sections. */ + void *merge_info; + + /* Used to link stabs in sections. */ + struct stab_info stab_info; + + /* Used by eh_frame code when editing .eh_frame. */ + struct eh_frame_hdr_info eh_info; + + /* A linked list of local symbols to be added to .dynsym. */ + struct elf_link_local_dynamic_entry *dynlocal; + + /* A linked list of DT_RPATH/DT_RUNPATH names found in dynamic + objects included in the link. */ + struct bfd_link_needed_list *runpath; + + /* Cached first output tls section and size of PT_TLS segment. */ + asection *tls_sec; + bfd_size_type tls_size; + + /* A linked list of BFD's loaded in the link. */ + struct elf_link_loaded_list *loaded; + + /* Short-cuts to get to dynamic linker sections. */ + asection *sgot; + asection *sgotplt; + asection *srelgot; + asection *splt; + asection *srelplt; + asection *igotplt; + asection *iplt; + asection *irelplt; + asection *irelifunc; +}; + +/* 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, \ + (bfd_boolean (*) (struct bfd_link_hash_entry *, void *)) (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)) + +#define elf_hash_table_id(table) ((table) -> hash_table_id) + +/* Returns TRUE if the hash table is a struct elf_link_hash_table. */ +#define is_elf_hash_table(htab) \ + (((struct bfd_link_hash_table *) (htab))->type == bfd_link_elf_hash_table) + +/* Used by bfd_sym_from_r_symndx to cache a small number of local + symbols. */ +#define LOCAL_SYM_CACHE_SIZE 32 +struct sym_cache +{ + bfd *abfd; + unsigned long indx[LOCAL_SYM_CACHE_SIZE]; + Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; +}; + +/* Constant information held for an ELF backend. */ + +struct elf_size_info { + unsigned char sizeof_ehdr, sizeof_phdr, sizeof_shdr; + unsigned char sizeof_rel, sizeof_rela, sizeof_sym, sizeof_dyn, sizeof_note; + + /* The size of entries in the .hash section. */ + unsigned char sizeof_hash_entry; + + /* The number of internal relocations to allocate per external + relocation entry. */ + unsigned char int_rels_per_ext_rel; + /* We use some fixed size arrays. This should be large enough to + handle all back-ends. */ +#define MAX_INT_RELS_PER_EXT_REL 3 + + unsigned char arch_size, log_file_align; + unsigned char elfclass, ev_current; + int (*write_out_phdrs) + (bfd *, const Elf_Internal_Phdr *, unsigned int); + bfd_boolean + (*write_shdrs_and_ehdr) (bfd *); + bfd_boolean (*checksum_contents) + (bfd * , void (*) (const void *, size_t, void *), void *); + void (*write_relocs) + (bfd *, asection *, void *); + bfd_boolean (*swap_symbol_in) + (bfd *, const void *, const void *, Elf_Internal_Sym *); + void (*swap_symbol_out) + (bfd *, const Elf_Internal_Sym *, void *, void *); + bfd_boolean (*slurp_reloc_table) + (bfd *, asection *, asymbol **, bfd_boolean); + long (*slurp_symbol_table) + (bfd *, asymbol **, bfd_boolean); + void (*swap_dyn_in) + (bfd *, const void *, Elf_Internal_Dyn *); + void (*swap_dyn_out) + (bfd *, const Elf_Internal_Dyn *, void *); + + /* This function is called to swap in a REL relocation. If an + external relocation corresponds to more than one internal + relocation, then all relocations are swapped in at once. */ + void (*swap_reloc_in) + (bfd *, const bfd_byte *, Elf_Internal_Rela *); + + /* This function is called to swap out a REL relocation. */ + void (*swap_reloc_out) + (bfd *, const Elf_Internal_Rela *, bfd_byte *); + + /* This function is called to swap in a RELA relocation. If an + external relocation corresponds to more than one internal + relocation, then all relocations are swapped in at once. */ + void (*swap_reloca_in) + (bfd *, const bfd_byte *, Elf_Internal_Rela *); + + /* This function is called to swap out a RELA relocation. */ + void (*swap_reloca_out) + (bfd *, const Elf_Internal_Rela *, bfd_byte *); +}; + +#define elf_symbol_from(ABFD,S) \ + (((S)->the_bfd->xvec->flavour == bfd_target_elf_flavour \ + && (S)->the_bfd->tdata.elf_obj_data != 0) \ + ? (elf_symbol_type *) (S) \ + : 0) + +enum elf_reloc_type_class { + reloc_class_normal, + reloc_class_relative, + reloc_class_plt, + reloc_class_copy, + reloc_class_ifunc +}; + +struct elf_reloc_cookie +{ + Elf_Internal_Rela *rels, *rel, *relend; + Elf_Internal_Sym *locsyms; + bfd *abfd; + size_t locsymcount; + size_t extsymoff; + struct elf_link_hash_entry **sym_hashes; + int r_sym_shift; + bfd_boolean bad_symtab; +}; + +/* The level of IRIX compatibility we're striving for. */ + +typedef enum { + ict_none, + ict_irix5, + ict_irix6 +} irix_compat_t; + +/* Mapping of ELF section names and types. */ +struct bfd_elf_special_section +{ + const char *prefix; + int prefix_length; + /* 0 means name must match PREFIX exactly. + -1 means name must start with PREFIX followed by an arbitrary string. + -2 means name must match PREFIX exactly or consist of PREFIX followed + by a dot then anything. + > 0 means name must start with the first PREFIX_LENGTH chars of + PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ + int suffix_length; + int type; + bfd_vma attr; +}; + +enum action_discarded + { + COMPLAIN = 1, + PRETEND = 2 + }; + +typedef asection * (*elf_gc_mark_hook_fn) + (asection *, struct bfd_link_info *, Elf_Internal_Rela *, + struct elf_link_hash_entry *, Elf_Internal_Sym *); + +struct elf_backend_data +{ + /* The architecture for this backend. */ + enum bfd_architecture arch; + + /* An identifier used to distinguish different target specific + extensions to elf_obj_tdata and elf_link_hash_table structures. */ + enum elf_target_id target_id; + + /* The ELF machine code (EM_xxxx) for this backend. */ + int elf_machine_code; + + /* EI_OSABI. */ + int elf_osabi; + + /* The maximum page size for this backend. */ + bfd_vma maxpagesize; + + /* The minimum page size for this backend. An input object will not be + considered page aligned unless its sections are correctly aligned for + pages at least this large. May be smaller than maxpagesize. */ + bfd_vma minpagesize; + + /* The common page size for this backend. */ + bfd_vma commonpagesize; + + /* The BFD flags applied to sections created for dynamic linking. */ + flagword dynamic_sec_flags; + + /* Architecture-specific data for this backend. + This is actually a pointer to some type like struct elf_ARCH_data. */ + const void *arch_data; + + /* A function to translate an ELF RELA relocation to a BFD arelent + structure. */ + void (*elf_info_to_howto) + (bfd *, arelent *, Elf_Internal_Rela *); + + /* A function to translate an ELF REL relocation to a BFD arelent + structure. */ + void (*elf_info_to_howto_rel) + (bfd *, arelent *, Elf_Internal_Rela *); + + /* A function to determine whether a symbol is global when + partitioning the symbol table into local and global symbols. + This should be NULL for most targets, in which case the correct + thing will be done. MIPS ELF, at least on the Irix 5, has + special requirements. */ + bfd_boolean (*elf_backend_sym_is_global) + (bfd *, asymbol *); + + /* The remaining functions are hooks which are called only if they + are not NULL. */ + + /* A function to permit a backend specific check on whether a + particular BFD format is relevant for an object file, and to + permit the backend to set any global information it wishes. When + this is called elf_elfheader is set, but anything else should be + used with caution. If this returns FALSE, the check_format + routine will return a bfd_error_wrong_format error. */ + bfd_boolean (*elf_backend_object_p) + (bfd *); + + /* A function to do additional symbol processing when reading the + ELF symbol table. This is where any processor-specific special + section indices are handled. */ + void (*elf_backend_symbol_processing) + (bfd *, asymbol *); + + /* A function to do additional symbol processing after reading the + entire ELF symbol table. */ + bfd_boolean (*elf_backend_symbol_table_processing) + (bfd *, 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) + (Elf_Internal_Sym *, int); + + /* A function to return the linker hash table entry of a symbol that + might be satisfied by an archive symbol. */ + struct elf_link_hash_entry * (*elf_backend_archive_symbol_lookup) + (bfd *, struct bfd_link_info *, const char *); + + /* Return true if local section symbols should have a non-null st_name. + NULL implies false. */ + bfd_boolean (*elf_backend_name_local_section_symbols) + (bfd *); + + /* 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 + unusual sections. */ + bfd_boolean (*elf_backend_section_processing) + (bfd *, Elf_Internal_Shdr *); + + /* A function to handle unusual section types when creating BFD + sections from ELF sections. */ + bfd_boolean (*elf_backend_section_from_shdr) + (bfd *, Elf_Internal_Shdr *, const char *, int); + + /* A function to convert machine dependent ELF section header flags to + BFD internal section header flags. */ + bfd_boolean (*elf_backend_section_flags) + (flagword *, const Elf_Internal_Shdr *); + + /* A function that returns a struct containing ELF section flags and + type for the given BFD section. */ + const struct bfd_elf_special_section * (*get_sec_type_attr) + (bfd *, asection *); + + /* A function to handle unusual program segment types when creating BFD + sections from ELF program segments. */ + bfd_boolean (*elf_backend_section_from_phdr) + (bfd *, Elf_Internal_Phdr *, int, const char *); + + /* A function to set up the ELF section header for a BFD section in + preparation for writing it out. This is where the flags and type + fields are set for unusual sections. */ + bfd_boolean (*elf_backend_fake_sections) + (bfd *, Elf_Internal_Shdr *, asection *); + + /* A function to get the ELF section index for a BFD section. If + this returns TRUE, the section was found. If it is a normal ELF + section, *RETVAL should be left unchanged. If it is not a normal + ELF section *RETVAL should be set to the SHN_xxxx index. */ + bfd_boolean (*elf_backend_section_from_bfd_section) + (bfd *, 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. */ + bfd_boolean (*elf_add_symbol_hook) + (bfd *abfd, struct bfd_link_info *info, Elf_Internal_Sym *, + const char **name, flagword *flags, asection **sec, bfd_vma *value); + + /* If this field is not NULL, it is called by the elf_link_output_sym + phase of a link for each symbol which will appear in the object file. + On error, this function returns 0. 1 is returned when the symbol + should be output, 2 is returned when the symbol should be discarded. */ + int (*elf_backend_link_output_symbol_hook) + (struct bfd_link_info *info, const char *, Elf_Internal_Sym *, + asection *, struct elf_link_hash_entry *); + + /* 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. */ + bfd_boolean (*elf_backend_create_dynamic_sections) + (bfd *abfd, struct bfd_link_info *info); + + /* When creating a shared library, determine whether to omit the + dynamic symbol for the section. */ + bfd_boolean (*elf_backend_omit_section_dynsym) + (bfd *output_bfd, struct bfd_link_info *info, asection *osec); + + /* Return TRUE if relocations of targets are compatible to the extent + that CHECK_RELOCS will properly process them. PR 4424. */ + bfd_boolean (*relocs_compatible) (const bfd_target *, const bfd_target *); + + /* The CHECK_RELOCS function is called by the add_symbols phase of + the ELF backend linker. It is called once for each section with + relocs of an object file, just after the symbols for the object + file have been added to the global linker hash table. The + function must look through the relocs and do any special handling + required. This generally means allocating space in the global + offset table, and perhaps allocating space for a reloc. The + relocs are always passed as Rela structures; if the section + actually uses Rel structures, the r_addend field will always be + zero. */ + bfd_boolean (*check_relocs) + (bfd *abfd, struct bfd_link_info *info, asection *o, + const Elf_Internal_Rela *relocs); + + /* The CHECK_DIRECTIVES function is called once per input file by + the add_symbols phase of the ELF backend linker. The function + must inspect the bfd and create any additional symbols according + to any custom directives in the bfd. */ + bfd_boolean (*check_directives) + (bfd *abfd, struct bfd_link_info *info); + + /* The NOTICE_AS_NEEDED function is called as the linker is about to + handle an as-needed lib (ACT = notice_as_needed), and after the + linker has decided to keep the lib (ACT = notice_needed) or when + the lib is not needed (ACT = notice_not_needed). */ + bfd_boolean (*notice_as_needed) + (bfd *abfd, struct bfd_link_info *info, enum notice_asneeded_action act); + + /* 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 ore bfd_link_hash_defweak, 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. */ + bfd_boolean (*elf_backend_adjust_dynamic_symbol) + (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. */ + bfd_boolean (*elf_backend_always_size_sections) + (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 + 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. */ + bfd_boolean (*elf_backend_size_dynamic_sections) + (bfd *output_bfd, struct bfd_link_info *info); + + /* Set TEXT_INDEX_SECTION and DATA_INDEX_SECTION, the output sections + we keep to use as a base for relocs and symbols. */ + void (*elf_backend_init_index_section) + (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 + relocatable 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 relocatable 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. + + Returns FALSE on error, TRUE on success, 2 if successful and + relocations should be written for this section. */ + int (*elf_backend_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); + + /* 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. */ + bfd_boolean (*elf_backend_finish_dynamic_symbol) + (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. */ + bfd_boolean (*elf_backend_finish_dynamic_sections) + (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) + (bfd *, struct bfd_link_info *); + + /* A function to do any final processing needed for the ELF file + before writing it out. The LINKER argument is TRUE if this BFD + was created by the ELF backend linker. */ + void (*elf_backend_final_write_processing) + (bfd *, bfd_boolean linker); + + /* This function is called by get_program_header_size. It should + return the number of additional program segments which this BFD + will need. It should return -1 on error. */ + int (*elf_backend_additional_program_headers) + (bfd *, struct bfd_link_info *); + + /* This function is called to modify an existing segment map in a + backend specific fashion. */ + bfd_boolean (*elf_backend_modify_segment_map) + (bfd *, struct bfd_link_info *); + + /* This function is called to modify program headers just before + they are written. */ + bfd_boolean (*elf_backend_modify_program_headers) + (bfd *, struct bfd_link_info *); + + /* This function is called before section garbage collection to + mark entry symbol sections. */ + void (*gc_keep) + (struct bfd_link_info *); + + /* This function is called during section garbage collection to + mark sections that define global symbols. */ + bfd_boolean (*gc_mark_dynamic_ref) + (struct elf_link_hash_entry *, void *); + + /* This function is called during section gc to discover the section a + particular relocation refers to. */ + elf_gc_mark_hook_fn gc_mark_hook; + + /* This function, if defined, is called after the first gc marking pass + to allow the backend to mark additional sections. */ + bfd_boolean (*gc_mark_extra_sections) + (struct bfd_link_info *, elf_gc_mark_hook_fn); + + /* 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. */ + bfd_boolean (*gc_sweep_hook) + (bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *); + + /* This function, if defined, is called after the ELF headers have + been created. This allows for things like the OS and ABI versions + to be changed. */ + void (*elf_backend_post_process_headers) + (bfd *, struct bfd_link_info *); + + /* This function, if defined, prints a symbol to file and returns the + name of the symbol to be printed. It should return NULL to fall + back to default symbol printing. */ + const char *(*elf_backend_print_symbol_all) + (bfd *, void *, asymbol *); + + /* This function, if defined, is called after all local symbols and + global symbols converted to locals are emitted into the symtab + section. It allows the backend to emit special local symbols + not handled in the hash table. */ + bfd_boolean (*elf_backend_output_arch_local_syms) + (bfd *, struct bfd_link_info *, void *, + bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, + struct elf_link_hash_entry *)); + + /* This function, if defined, is called after all symbols are emitted + into the symtab section. It allows the backend to emit special + global symbols not handled in the hash table. */ + bfd_boolean (*elf_backend_output_arch_syms) + (bfd *, struct bfd_link_info *, void *, + bfd_boolean (*) (void *, const char *, Elf_Internal_Sym *, asection *, + struct elf_link_hash_entry *)); + + /* Copy any information related to dynamic linking from a pre-existing + symbol to a newly created symbol. Also called to copy flags and + other back-end info to a weakdef, in which case the symbol is not + newly created and plt/got refcounts and dynamic indices should not + be copied. */ + void (*elf_backend_copy_indirect_symbol) + (struct bfd_link_info *, struct elf_link_hash_entry *, + struct elf_link_hash_entry *); + + /* Modify any information related to dynamic linking such that the + symbol is not exported. */ + void (*elf_backend_hide_symbol) + (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); + + /* A function to do additional symbol fixup, called by + _bfd_elf_fix_symbol_flags. */ + bfd_boolean (*elf_backend_fixup_symbol) + (struct bfd_link_info *, struct elf_link_hash_entry *); + + /* Merge the backend specific symbol attribute. */ + void (*elf_backend_merge_symbol_attribute) + (struct elf_link_hash_entry *, const Elf_Internal_Sym *, bfd_boolean, + bfd_boolean); + + /* This function, if defined, will return a string containing the + name of a target-specific dynamic tag. */ + char *(*elf_backend_get_target_dtag) + (bfd_vma); + + /* Decide whether an undefined symbol is special and can be ignored. + This is the case for OPTIONAL symbols on IRIX. */ + bfd_boolean (*elf_backend_ignore_undef_symbol) + (struct elf_link_hash_entry *); + + /* Emit relocations. Overrides default routine for emitting relocs, + except during a relocatable link, or if all relocs are being emitted. */ + bfd_boolean (*elf_backend_emit_relocs) + (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, + struct elf_link_hash_entry **); + + /* Count relocations. Not called for relocatable links + or if all relocs are being preserved in the output. */ + unsigned int (*elf_backend_count_relocs) + (struct bfd_link_info *, asection *); + + /* This function, if defined, is called when an NT_PRSTATUS note is found + in a core file. */ + bfd_boolean (*elf_backend_grok_prstatus) + (bfd *, Elf_Internal_Note *); + + /* This function, if defined, is called when an NT_PSINFO or NT_PRPSINFO + note is found in a core file. */ + bfd_boolean (*elf_backend_grok_psinfo) + (bfd *, Elf_Internal_Note *); + + /* This function, if defined, is called to write a note to a corefile. */ + char *(*elf_backend_write_core_note) + (bfd *abfd, char *buf, int *bufsiz, int note_type, ...); + + /* This function, if defined, is called to convert target-specific + section flag names into hex values. */ + flagword (*elf_backend_lookup_section_flags_hook) + (char *); + + /* This function returns class of a reloc type. */ + enum elf_reloc_type_class (*elf_backend_reloc_type_class) + (const struct bfd_link_info *, const asection *, const Elf_Internal_Rela *); + + /* This function, if defined, removes information about discarded functions + from other sections which mention them. */ + bfd_boolean (*elf_backend_discard_info) + (bfd *, struct elf_reloc_cookie *, struct bfd_link_info *); + + /* This function, if defined, signals that the function above has removed + the discarded relocations for this section. */ + bfd_boolean (*elf_backend_ignore_discarded_relocs) + (asection *); + + /* What to do when ld finds relocations against symbols defined in + discarded sections. */ + unsigned int (*action_discarded) + (asection *); + + /* This function returns the width of FDE pointers in bytes, or 0 if + that can't be determined for some reason. The default definition + goes by the bfd's EI_CLASS. */ + unsigned int (*elf_backend_eh_frame_address_size) + (bfd *, asection *); + + /* These functions tell elf-eh-frame whether to attempt to turn + absolute or lsda encodings into pc-relative ones. The default + definition enables these transformations. */ + bfd_boolean (*elf_backend_can_make_relative_eh_frame) + (bfd *, struct bfd_link_info *, asection *); + bfd_boolean (*elf_backend_can_make_lsda_relative_eh_frame) + (bfd *, struct bfd_link_info *, asection *); + + /* This function returns an encoding after computing the encoded + value (and storing it in ENCODED) for the given OFFSET into OSEC, + to be stored in at LOC_OFFSET into the LOC_SEC input section. + The default definition chooses a 32-bit PC-relative encoding. */ + bfd_byte (*elf_backend_encode_eh_address) + (bfd *abfd, struct bfd_link_info *info, + asection *osec, bfd_vma offset, + asection *loc_sec, bfd_vma loc_offset, + bfd_vma *encoded); + + /* This function, if defined, may write out the given section. + Returns TRUE if it did so and FALSE if the caller should. */ + bfd_boolean (*elf_backend_write_section) + (bfd *, struct bfd_link_info *, asection *, bfd_byte *); + + /* The level of IRIX compatibility we're striving for. + MIPS ELF specific function. */ + irix_compat_t (*elf_backend_mips_irix_compat) + (bfd *); + + reloc_howto_type *(*elf_backend_mips_rtype_to_howto) + (unsigned int, bfd_boolean); + + /* 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; + + /* This function implements `bfd_elf_bfd_from_remote_memory'; + see elf.c, elfcode.h. */ + bfd *(*elf_backend_bfd_from_remote_memory) + (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, + int (*target_read_memory) (bfd_vma vma, bfd_byte *myaddr, + bfd_size_type len)); + + /* This function is used by `_bfd_elf_get_synthetic_symtab'; + see elf.c. */ + bfd_vma (*plt_sym_val) (bfd_vma, const asection *, const arelent *); + + /* Is symbol defined in common section? */ + bfd_boolean (*common_definition) (Elf_Internal_Sym *); + + /* Return a common section index for section. */ + unsigned int (*common_section_index) (asection *); + + /* Return a common section for section. */ + asection *(*common_section) (asection *); + + /* Return TRUE if we can merge 2 definitions. */ + bfd_boolean (*merge_symbol) (struct elf_link_hash_entry *, + const Elf_Internal_Sym *, asection **, + bfd_boolean, bfd_boolean, + bfd *, const asection *); + + /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ + bfd_boolean (*elf_hash_symbol) (struct elf_link_hash_entry *); + + /* Return TRUE if type is a function symbol type. */ + bfd_boolean (*is_function_type) (unsigned int type); + + /* If the ELF symbol SYM might be a function in SEC, return the + function size and set *CODE_OFF to the function's entry point, + otherwise return zero. */ + bfd_size_type (*maybe_function_sym) (const asymbol *sym, asection *sec, + bfd_vma *code_off); + + /* Used to handle bad SHF_LINK_ORDER input. */ + bfd_error_handler_type link_order_error_handler; + + /* Name of the PLT relocation section. */ + const char *relplt_name; + + /* Alternate EM_xxxx machine codes for this backend. */ + int elf_machine_alt1; + int elf_machine_alt2; + + const struct elf_size_info *s; + + /* An array of target specific special sections. */ + const struct bfd_elf_special_section *special_sections; + + /* The size in bytes of the header for the GOT. This includes the + so-called reserved entries on some systems. */ + bfd_vma got_header_size; + + /* The size of the GOT entry for the symbol pointed to by H if non-NULL, + otherwise by the local symbol with index SYMNDX in IBFD. */ + bfd_vma (*got_elt_size) (bfd *, struct bfd_link_info *, + struct elf_link_hash_entry *h, + bfd *ibfd, unsigned long symndx); + + /* The vendor name to use for a processor-standard attributes section. */ + const char *obj_attrs_vendor; + + /* The section name to use for a processor-standard attributes section. */ + const char *obj_attrs_section; + + /* Return 1, 2 or 3 to indicate what type of arguments a + processor-specific tag takes. */ + int (*obj_attrs_arg_type) (int); + + /* The section type to use for an attributes section. */ + unsigned int obj_attrs_section_type; + + /* This function determines the order in which any attributes are + written. It must be defined for input in the range + LEAST_KNOWN_OBJ_ATTRIBUTE..NUM_KNOWN_OBJ_ATTRIBUTES-1 (this range + is used in order to make unity easy). The returned value is the + actual tag number to place in the input position. */ + int (*obj_attrs_order) (int); + + /* Handle merging unknown attributes; either warn and return TRUE, + or give an error and return FALSE. */ + bfd_boolean (*obj_attrs_handle_unknown) (bfd *, int); + + /* This is non-zero if static TLS segments require a special alignment. */ + unsigned static_tls_alignment; + + /* Alignment for the PT_GNU_STACK segment. */ + unsigned stack_align; + + /* 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. */ + unsigned collect : 1; + + /* This is TRUE if the linker should ignore changes to the type of a + symbol. This is TRUE for MIPS ELF because some Irix 5 objects + record undefined functions as STT_OBJECT although the definitions + are STT_FUNC. */ + unsigned type_change_ok : 1; + + /* Whether the backend may use REL relocations. (Some backends use + both REL and RELA relocations, and this flag is set for those + backends.) */ + unsigned may_use_rel_p : 1; + + /* Whether the backend may use RELA relocations. (Some backends use + both REL and RELA relocations, and this flag is set for those + backends.) */ + unsigned may_use_rela_p : 1; + + /* Whether the default relocation type is RELA. If a backend with + this flag set wants REL relocations for a particular section, + it must note that explicitly. Similarly, if this flag is clear, + and the backend wants RELA relocations for a particular + section. */ + unsigned default_use_rela_p : 1; + + /* True if PLT and copy relocations should be RELA by default. */ + unsigned rela_plts_and_copies_p : 1; + + /* Set if RELA relocations for a relocatable link can be handled by + generic code. Backends that set this flag need do nothing in the + backend relocate_section routine for relocatable linking. */ + unsigned rela_normal : 1; + + /* TRUE if addresses "naturally" sign extend. This is used when + swapping in from Elf32 when BFD64. */ + unsigned sign_extend_vma : 1; + + 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; + unsigned can_refcount : 1; + unsigned want_got_sym : 1; + unsigned want_dynbss : 1; + + /* Targets which do not support physical addressing often require + that the p_paddr field in the section header to be set to zero. + This field indicates whether this behavior is required. */ + unsigned want_p_paddr_set_to_zero : 1; + + /* True if an object file lacking a .note.GNU-stack section + should be assumed to be requesting exec stack. At least one + other file in the link needs to have a .note.GNU-stack section + for a PT_GNU_STACK segment to be created. */ + unsigned default_execstack : 1; +}; + +/* Information about reloc sections associated with a bfd_elf_section_data + structure. */ +struct bfd_elf_section_reloc_data +{ + /* The ELF header for the reloc section associated with this + section, if any. */ + Elf_Internal_Shdr *hdr; + /* The number of relocations currently assigned to HDR. */ + unsigned int count; + /* The ELF section number of the reloc section. Only used for an + output file. */ + int idx; + /* Used by the backend linker to store the symbol hash table entries + associated with relocs against global symbols. */ + struct elf_link_hash_entry **hashes; +}; + +/* Information stored for each BFD section in an ELF file. This + structure is allocated by elf_new_section_hook. */ + +struct bfd_elf_section_data +{ + /* The ELF header for this section. */ + Elf_Internal_Shdr this_hdr; + + /* INPUT_SECTION_FLAGS if specified in the linker script. */ + struct flag_info *section_flag_info; + + /* Information about the REL and RELA reloc sections associated + with this section, if any. */ + struct bfd_elf_section_reloc_data rel, rela; + + /* The ELF section number of this section. */ + int this_idx; + + /* Used by the backend linker when generating a shared library to + record the dynamic symbol index for a section symbol + corresponding to this section. A value of 0 means that there is + no dynamic symbol for this section. */ + int dynindx; + + /* A pointer to the linked-to section for SHF_LINK_ORDER. */ + asection *linked_to; + + /* A pointer to the swapped relocs. If the section uses REL relocs, + rather than RELA, all the r_addend fields will be zero. This + pointer may be NULL. It is used by the backend linker. */ + Elf_Internal_Rela *relocs; + + /* A pointer to a linked list tracking dynamic relocs copied for + local symbols. */ + void *local_dynrel; + + /* A pointer to the bfd section used for dynamic relocs. */ + asection *sreloc; + + union { + /* Group name, if this section is a member of a group. */ + const char *name; + + /* Group signature sym, if this is the SHT_GROUP section. */ + struct bfd_symbol *id; + } group; + + /* For a member of a group, points to the SHT_GROUP section. + NULL for the SHT_GROUP section itself and non-group sections. */ + asection *sec_group; + + /* A linked list of member sections in the group. Circular when used by + the linker. For the SHT_GROUP section, points at first member. */ + asection *next_in_group; + + /* The FDEs associated with this section. The u.fde.next_in_section + field acts as a chain pointer. */ + struct eh_cie_fde *fde_list; + + /* A pointer used for various section optimizations. */ + void *sec_info; +}; + +#define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) +#define elf_linked_to_section(sec) (elf_section_data(sec)->linked_to) +#define elf_section_type(sec) (elf_section_data(sec)->this_hdr.sh_type) +#define elf_section_flags(sec) (elf_section_data(sec)->this_hdr.sh_flags) +#define elf_group_name(sec) (elf_section_data(sec)->group.name) +#define elf_group_id(sec) (elf_section_data(sec)->group.id) +#define elf_next_in_group(sec) (elf_section_data(sec)->next_in_group) +#define elf_fde_list(sec) (elf_section_data(sec)->fde_list) +#define elf_sec_group(sec) (elf_section_data(sec)->sec_group) + +#define xvec_get_elf_backend_data(xvec) \ + ((const struct elf_backend_data *) (xvec)->backend_data) + +#define get_elf_backend_data(abfd) \ + xvec_get_elf_backend_data ((abfd)->xvec) + +/* The least object attributes (within an attributes subsection) known + for any target. Some code assumes that the value 0 is not used and + the field for that attribute can instead be used as a marker to + indicate that attributes have been initialized. */ +#define LEAST_KNOWN_OBJ_ATTRIBUTE 2 + +/* The maximum number of known object attributes for any target. */ +#define NUM_KNOWN_OBJ_ATTRIBUTES 71 + +/* The value of an object attribute. The type indicates whether the attribute + holds and integer, a string, or both. It can also indicate that there can + be no default (i.e. all values must be written to file, even zero). */ + +typedef struct obj_attribute +{ +#define ATTR_TYPE_FLAG_INT_VAL (1 << 0) +#define ATTR_TYPE_FLAG_STR_VAL (1 << 1) +#define ATTR_TYPE_FLAG_NO_DEFAULT (1 << 2) + +#define ATTR_TYPE_HAS_INT_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_INT_VAL) +#define ATTR_TYPE_HAS_STR_VAL(TYPE) ((TYPE) & ATTR_TYPE_FLAG_STR_VAL) +#define ATTR_TYPE_HAS_NO_DEFAULT(TYPE) ((TYPE) & ATTR_TYPE_FLAG_NO_DEFAULT) + + int type; + unsigned int i; + char *s; +} obj_attribute; + +typedef struct obj_attribute_list +{ + struct obj_attribute_list *next; + int tag; + obj_attribute attr; +} obj_attribute_list; + +/* Object attributes may either be defined by the processor ABI, index + OBJ_ATTR_PROC in the *_obj_attributes arrays, or be GNU-specific + (and possibly also processor-specific), index OBJ_ATTR_GNU. */ +#define OBJ_ATTR_PROC 0 +#define OBJ_ATTR_GNU 1 +#define OBJ_ATTR_FIRST OBJ_ATTR_PROC +#define OBJ_ATTR_LAST OBJ_ATTR_GNU + +/* The following object attribute tags are taken as generic, for all + targets and for "gnu" where there is no target standard. */ +enum +{ + Tag_NULL = 0, + Tag_File = 1, + Tag_Section = 2, + Tag_Symbol = 3, + Tag_compatibility = 32 +}; + +/* The following struct stores information about every SystemTap section + found in the object file. */ +struct sdt_note +{ + struct sdt_note *next; + bfd_size_type size; + bfd_byte data[1]; +}; + +/* NT_GNU_BUILD_ID note type info for input BFDs. */ +struct elf_build_id +{ + size_t size; + bfd_byte data[1]; +}; + +/* tdata information grabbed from an elf core file. */ +struct core_elf_obj_tdata +{ + int signal; + int pid; + int lwpid; + char* program; + char* command; +}; + +/* Extra tdata information held for output ELF BFDs. */ +struct output_elf_obj_tdata +{ + struct elf_segment_map *seg_map; + struct elf_strtab_hash *strtab_ptr; + + /* STT_SECTION symbols for each section */ + asymbol **section_syms; + + /* Used to determine if PT_GNU_EH_FRAME segment header should be + created. */ + asection *eh_frame_hdr; + + /* NT_GNU_BUILD_ID note type info. */ + struct + { + bfd_boolean (*after_write_object_contents) (bfd *); + const char *style; + asection *sec; + } build_id; + + /* Records the result of `get_program_header_size'. */ + bfd_size_type program_header_size; + + /* Used when laying out sections. */ + file_ptr next_file_pos; + + int num_section_syms; + unsigned int shstrtab_section, strtab_section; + + /* Segment flags for the PT_GNU_STACK segment. */ + unsigned int stack_flags; + + /* This is set to TRUE if the object was created by the backend + linker. */ + bfd_boolean linker; + + /* Used to determine if the e_flags field has been initialized */ + bfd_boolean flags_init; +}; + +/* Some private data is stashed away for future use using the tdata pointer + in the bfd structure. */ + +struct elf_obj_tdata +{ + Elf_Internal_Ehdr elf_header[1]; /* Actual data, but ref like ptr */ + Elf_Internal_Shdr **elf_sect_ptr; + Elf_Internal_Phdr *phdr; + Elf_Internal_Shdr symtab_hdr; + Elf_Internal_Shdr shstrtab_hdr; + 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; + Elf_Internal_Shdr symtab_shndx_hdr; + bfd_vma gp; /* The gp value */ + unsigned int gp_size; /* The gp size */ + unsigned int num_elf_sections; /* elf_sect_ptr size */ + + /* 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; + + /* Track usage and final offsets of GOT entries for local symbols. + This array is indexed by symbol index. Elements are used + identically to "got" in struct elf_link_hash_entry. */ + union + { + bfd_signed_vma *refcounts; + bfd_vma *offsets; + struct got_entry **ents; + } local_got; + + /* The linker ELF emulation code needs to let the backend ELF linker + know what filename should be used for a dynamic object if the + dynamic object is found using a search. The emulation code then + sometimes needs to know what name was actually used. Until the + file has been added to the linker symbol table, this field holds + the name the linker wants. After it has been added, it holds the + name actually used, which will be the DT_SONAME entry if there is + one. */ + const char *dt_name; + + /* The linker emulation needs to know what audit libs + are used by a dynamic object. */ + const char *dt_audit; + + /* Used by find_nearest_line entry point. */ + void *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. */ + void *dwarf2_find_line_info; + + /* Stash away info for yet another find line/function variant. */ + void *elf_find_function_cache; + + /* 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; + + /* A pointer to the .eh_frame section. */ + asection *eh_frame_section; + + /* Symbol buffer. */ + void *symbuf; + + obj_attribute known_obj_attributes[2][NUM_KNOWN_OBJ_ATTRIBUTES]; + obj_attribute_list *other_obj_attributes[2]; + + /* NT_GNU_BUILD_ID note type. */ + struct elf_build_id *build_id; + + /* Linked-list containing information about every Systemtap section + found in the object file. Each section corresponds to one entry + in the list. */ + struct sdt_note *sdt_note_head; + + Elf_Internal_Shdr **group_sect_ptr; + int num_group; + + unsigned int symtab_section, symtab_shndx_section, dynsymtab_section; + unsigned int dynversym_section, dynverdef_section, dynverref_section; + + /* An identifier used to distinguish different target + specific extensions to this structure. */ + enum elf_target_id object_id; + + /* Whether a dyanmic object was specified normally on the linker + command line, or was specified when --as-needed was in effect, + or was found via a DT_NEEDED entry. */ + enum dynamic_lib_link_class dyn_lib_class; + + /* Irix 5 often screws up the symbol table, sorting local symbols + after global symbols. This flag is set if the symbol table in + this BFD appears to be screwed up. If it is, we ignore the + sh_info field in the symbol table header, and always read all the + symbols. */ + bfd_boolean bad_symtab; + + /* True if the bfd contains symbols that have the STT_GNU_IFUNC + symbol type or STB_GNU_UNIQUE binding. Used to set the osabi + field in the ELF header structure. */ + bfd_boolean has_gnu_symbols; + + /* Information grabbed from an elf core file. */ + struct core_elf_obj_tdata *core; + + /* More information held for output ELF BFDs. */ + struct output_elf_obj_tdata *o; +}; + +#define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) + +#define elf_object_id(bfd) (elf_tdata(bfd) -> object_id) +#define elf_program_header_size(bfd) (elf_tdata(bfd) -> o->program_header_size) +#define elf_elfheader(bfd) (elf_tdata(bfd) -> elf_header) +#define elf_elfsections(bfd) (elf_tdata(bfd) -> elf_sect_ptr) +#define elf_numsections(bfd) (elf_tdata(bfd) -> num_elf_sections) +#define elf_seg_map(bfd) (elf_tdata(bfd) -> o->seg_map) +#define elf_next_file_pos(bfd) (elf_tdata(bfd) -> o->next_file_pos) +#define elf_eh_frame_hdr(bfd) (elf_tdata(bfd) -> o->eh_frame_hdr) +#define elf_linker(bfd) (elf_tdata(bfd) -> o->linker) +#define elf_stack_flags(bfd) (elf_tdata(bfd) -> o->stack_flags) +#define elf_shstrtab(bfd) (elf_tdata(bfd) -> o->strtab_ptr) +#define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) +#define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_section) +#define elf_strtab_sec(bfd) (elf_tdata(bfd) -> o->strtab_section) +#define elf_shstrtab_sec(bfd) (elf_tdata(bfd) -> o->shstrtab_section) +#define elf_symtab_hdr(bfd) (elf_tdata(bfd) -> symtab_hdr) +#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_eh_frame_section(bfd) \ + (elf_tdata(bfd) -> eh_frame_section) +#define elf_section_syms(bfd) (elf_tdata(bfd) -> o->section_syms) +#define elf_num_section_syms(bfd) (elf_tdata(bfd) -> o->num_section_syms) +#define core_prpsinfo(bfd) (elf_tdata(bfd) -> prpsinfo) +#define core_prstatus(bfd) (elf_tdata(bfd) -> prstatus) +#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_refcounts(bfd) (elf_tdata(bfd) -> local_got.refcounts) +#define elf_local_got_offsets(bfd) (elf_tdata(bfd) -> local_got.offsets) +#define elf_local_got_ents(bfd) (elf_tdata(bfd) -> local_got.ents) +#define elf_dt_name(bfd) (elf_tdata(bfd) -> dt_name) +#define elf_dt_audit(bfd) (elf_tdata(bfd) -> dt_audit) +#define elf_dyn_lib_class(bfd) (elf_tdata(bfd) -> dyn_lib_class) +#define elf_bad_symtab(bfd) (elf_tdata(bfd) -> bad_symtab) +#define elf_flags_init(bfd) (elf_tdata(bfd) -> o->flags_init) +#define elf_known_obj_attributes(bfd) (elf_tdata (bfd) -> known_obj_attributes) +#define elf_other_obj_attributes(bfd) (elf_tdata (bfd) -> other_obj_attributes) +#define elf_known_obj_attributes_proc(bfd) \ + (elf_known_obj_attributes (bfd) [OBJ_ATTR_PROC]) +#define elf_other_obj_attributes_proc(bfd) \ + (elf_other_obj_attributes (bfd) [OBJ_ATTR_PROC]) + +extern void _bfd_elf_swap_verdef_in + (bfd *, const Elf_External_Verdef *, Elf_Internal_Verdef *); +extern void _bfd_elf_swap_verdef_out + (bfd *, const Elf_Internal_Verdef *, Elf_External_Verdef *); +extern void _bfd_elf_swap_verdaux_in + (bfd *, const Elf_External_Verdaux *, Elf_Internal_Verdaux *); +extern void _bfd_elf_swap_verdaux_out + (bfd *, const Elf_Internal_Verdaux *, Elf_External_Verdaux *); +extern void _bfd_elf_swap_verneed_in + (bfd *, const Elf_External_Verneed *, Elf_Internal_Verneed *); +extern void _bfd_elf_swap_verneed_out + (bfd *, const Elf_Internal_Verneed *, Elf_External_Verneed *); +extern void _bfd_elf_swap_vernaux_in + (bfd *, const Elf_External_Vernaux *, Elf_Internal_Vernaux *); +extern void _bfd_elf_swap_vernaux_out + (bfd *, const Elf_Internal_Vernaux *, Elf_External_Vernaux *); +extern void _bfd_elf_swap_versym_in + (bfd *, const Elf_External_Versym *, Elf_Internal_Versym *); +extern void _bfd_elf_swap_versym_out + (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); + +extern unsigned int _bfd_elf_section_from_bfd_section + (bfd *, asection *); +extern char *bfd_elf_string_from_elf_section + (bfd *, unsigned, unsigned); +extern Elf_Internal_Sym *bfd_elf_get_elf_syms + (bfd *, Elf_Internal_Shdr *, size_t, size_t, Elf_Internal_Sym *, void *, + Elf_External_Sym_Shndx *); +extern const char *bfd_elf_sym_name + (bfd *, Elf_Internal_Shdr *, Elf_Internal_Sym *, asection *); + +extern bfd_boolean _bfd_elf_copy_private_bfd_data + (bfd *, bfd *); +extern bfd_boolean _bfd_elf_print_private_bfd_data + (bfd *, void *); +extern void bfd_elf_print_symbol + (bfd *, void *, asymbol *, bfd_print_symbol_type); + +extern unsigned int _bfd_elf_eh_frame_address_size + (bfd *, asection *); +extern bfd_byte _bfd_elf_encode_eh_address + (bfd *abfd, struct bfd_link_info *info, asection *osec, bfd_vma offset, + asection *loc_sec, bfd_vma loc_offset, bfd_vma *encoded); +extern bfd_boolean _bfd_elf_can_make_relative + (bfd *input_bfd, struct bfd_link_info *info, asection *eh_frame_section); + +extern enum elf_reloc_type_class _bfd_elf_reloc_type_class + (const struct bfd_link_info *, const asection *, + const Elf_Internal_Rela *); +extern bfd_vma _bfd_elf_rela_local_sym + (bfd *, Elf_Internal_Sym *, asection **, Elf_Internal_Rela *); +extern bfd_vma _bfd_elf_rel_local_sym + (bfd *, Elf_Internal_Sym *, asection **, bfd_vma); +extern bfd_vma _bfd_elf_section_offset + (bfd *, struct bfd_link_info *, asection *, bfd_vma); + +extern unsigned long bfd_elf_hash + (const char *); +extern unsigned long bfd_elf_gnu_hash + (const char *); + +extern bfd_reloc_status_type bfd_elf_generic_reloc + (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **); +extern bfd_boolean bfd_elf_allocate_object + (bfd *, size_t, enum elf_target_id); +extern bfd_boolean bfd_elf_make_object + (bfd *); +extern bfd_boolean bfd_elf_mkcorefile + (bfd *); +extern bfd_boolean _bfd_elf_make_section_from_shdr + (bfd *, Elf_Internal_Shdr *, const char *, int); +extern bfd_boolean _bfd_elf_make_section_from_phdr + (bfd *, Elf_Internal_Phdr *, int, const char *); +extern struct bfd_hash_entry *_bfd_elf_link_hash_newfunc + (struct bfd_hash_entry *, struct bfd_hash_table *, const char *); +extern struct bfd_link_hash_table *_bfd_elf_link_hash_table_create + (bfd *); +extern void _bfd_elf_link_hash_table_free + (struct bfd_link_hash_table *); +extern void _bfd_elf_link_hash_copy_indirect + (struct bfd_link_info *, struct elf_link_hash_entry *, + struct elf_link_hash_entry *); +extern void _bfd_elf_link_hash_hide_symbol + (struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean); +extern bfd_boolean _bfd_elf_link_hash_fixup_symbol + (struct bfd_link_info *, struct elf_link_hash_entry *); +extern bfd_boolean _bfd_elf_link_hash_table_init + (struct elf_link_hash_table *, bfd *, + struct bfd_hash_entry *(*) + (struct bfd_hash_entry *, struct bfd_hash_table *, const char *), + unsigned int, enum elf_target_id); +extern bfd_boolean _bfd_elf_slurp_version_tables + (bfd *, bfd_boolean); +extern bfd_boolean _bfd_elf_merge_sections + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_match_sections_by_type + (bfd *, const asection *, bfd *, const asection *); +extern bfd_boolean bfd_elf_is_group_section + (bfd *, const struct bfd_section *); +extern bfd_boolean _bfd_elf_section_already_linked + (bfd *, asection *, struct bfd_link_info *); +extern void bfd_elf_set_group_contents + (bfd *, asection *, void *); +extern asection *_bfd_elf_check_kept_section + (asection *, struct bfd_link_info *); +#define _bfd_elf_link_just_syms _bfd_generic_link_just_syms +extern void _bfd_elf_copy_link_hash_symbol_type + (bfd *, struct bfd_link_hash_entry *, struct bfd_link_hash_entry *); +extern bfd_boolean _bfd_elf_size_group_sections + (struct bfd_link_info *); +extern bfd_boolean _bfd_elf_fixup_group_sections +(bfd *, asection *); +extern bfd_boolean _bfd_elf_copy_private_header_data + (bfd *, bfd *); +extern bfd_boolean _bfd_elf_copy_private_symbol_data + (bfd *, asymbol *, bfd *, asymbol *); +#define _bfd_generic_init_private_section_data \ + _bfd_elf_init_private_section_data +extern bfd_boolean _bfd_elf_init_private_section_data + (bfd *, asection *, bfd *, asection *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_copy_private_section_data + (bfd *, asection *, bfd *, asection *); +extern bfd_boolean _bfd_elf_write_object_contents + (bfd *); +extern bfd_boolean _bfd_elf_write_corefile_contents + (bfd *); +extern bfd_boolean _bfd_elf_set_section_contents + (bfd *, sec_ptr, const void *, file_ptr, bfd_size_type); +extern long _bfd_elf_get_symtab_upper_bound + (bfd *); +extern long _bfd_elf_canonicalize_symtab + (bfd *, asymbol **); +extern long _bfd_elf_get_dynamic_symtab_upper_bound + (bfd *); +extern long _bfd_elf_canonicalize_dynamic_symtab + (bfd *, asymbol **); +extern long _bfd_elf_get_synthetic_symtab + (bfd *, long, asymbol **, long, asymbol **, asymbol **); +extern long _bfd_elf_get_reloc_upper_bound + (bfd *, sec_ptr); +extern long _bfd_elf_canonicalize_reloc + (bfd *, sec_ptr, arelent **, asymbol **); +extern asection * _bfd_elf_get_dynamic_reloc_section + (bfd *, asection *, bfd_boolean); +extern asection * _bfd_elf_make_dynamic_reloc_section + (asection *, bfd *, unsigned int, bfd *, bfd_boolean); +extern long _bfd_elf_get_dynamic_reloc_upper_bound + (bfd *); +extern long _bfd_elf_canonicalize_dynamic_reloc + (bfd *, arelent **, asymbol **); +extern asymbol *_bfd_elf_make_empty_symbol + (bfd *); +extern void _bfd_elf_get_symbol_info + (bfd *, asymbol *, symbol_info *); +extern bfd_boolean _bfd_elf_is_local_label_name + (bfd *, const char *); +extern alent *_bfd_elf_get_lineno + (bfd *, asymbol *); +extern bfd_boolean _bfd_elf_set_arch_mach + (bfd *, enum bfd_architecture, unsigned long); +extern bfd_boolean _bfd_elf_find_nearest_line + (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, + unsigned int *); +extern bfd_boolean _bfd_elf_find_nearest_line_discriminator + (bfd *, asection *, asymbol **, bfd_vma, const char **, const char **, + unsigned int *, unsigned int *); +extern bfd_boolean _bfd_elf_find_line + (bfd *, asymbol **, asymbol *, const char **, unsigned int *); +extern bfd_boolean _bfd_elf_find_line_discriminator + (bfd *, asymbol **, asymbol *, const char **, unsigned int *, unsigned int *); +#define _bfd_generic_find_line _bfd_elf_find_line +#define _bfd_generic_find_nearest_line_discriminator \ + _bfd_elf_find_nearest_line_discriminator +extern bfd_boolean _bfd_elf_find_inliner_info + (bfd *, const char **, const char **, unsigned int *); +#define _bfd_elf_read_minisymbols _bfd_generic_read_minisymbols +#define _bfd_elf_minisymbol_to_symbol _bfd_generic_minisymbol_to_symbol +extern int _bfd_elf_sizeof_headers + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_new_section_hook + (bfd *, asection *); +extern const struct bfd_elf_special_section *_bfd_elf_get_special_section + (const char *, const struct bfd_elf_special_section *, unsigned int); +extern const struct bfd_elf_special_section *_bfd_elf_get_sec_type_attr + (bfd *, asection *); + +/* If the target doesn't have reloc handling written yet: */ +extern void _bfd_elf_no_info_to_howto + (bfd *, arelent *, Elf_Internal_Rela *); + +extern bfd_boolean bfd_section_from_shdr + (bfd *, unsigned int shindex); +extern bfd_boolean bfd_section_from_phdr + (bfd *, Elf_Internal_Phdr *, int); + +extern int _bfd_elf_symbol_from_bfd_symbol + (bfd *, asymbol **); + +extern Elf_Internal_Sym *bfd_sym_from_r_symndx + (struct sym_cache *, bfd *, unsigned long); +extern asection *bfd_section_from_elf_index + (bfd *, unsigned int); +extern struct bfd_strtab_hash *_bfd_elf_stringtab_init + (void); + +extern struct elf_strtab_hash * _bfd_elf_strtab_init + (void); +extern void _bfd_elf_strtab_free + (struct elf_strtab_hash *); +extern bfd_size_type _bfd_elf_strtab_add + (struct elf_strtab_hash *, const char *, bfd_boolean); +extern void _bfd_elf_strtab_addref + (struct elf_strtab_hash *, bfd_size_type); +extern void _bfd_elf_strtab_delref + (struct elf_strtab_hash *, bfd_size_type); +extern unsigned int _bfd_elf_strtab_refcount + (struct elf_strtab_hash *, bfd_size_type); +extern void _bfd_elf_strtab_clear_all_refs + (struct elf_strtab_hash *tab); +extern void _bfd_elf_strtab_restore_size + (struct elf_strtab_hash *, bfd_size_type); +extern bfd_size_type _bfd_elf_strtab_size + (struct elf_strtab_hash *); +extern bfd_size_type _bfd_elf_strtab_offset + (struct elf_strtab_hash *, bfd_size_type); +extern bfd_boolean _bfd_elf_strtab_emit + (bfd *, struct elf_strtab_hash *); +extern void _bfd_elf_strtab_finalize + (struct elf_strtab_hash *); + +extern void _bfd_elf_begin_eh_frame_parsing + (struct bfd_link_info *info); +extern void _bfd_elf_parse_eh_frame + (bfd *, struct bfd_link_info *, asection *, struct elf_reloc_cookie *); +extern void _bfd_elf_end_eh_frame_parsing + (struct bfd_link_info *info); + +extern bfd_boolean _bfd_elf_discard_section_eh_frame + (bfd *, struct bfd_link_info *, asection *, + bfd_boolean (*) (bfd_vma, void *), struct elf_reloc_cookie *); +extern bfd_boolean _bfd_elf_discard_section_eh_frame_hdr + (bfd *, struct bfd_link_info *); +extern bfd_vma _bfd_elf_eh_frame_section_offset + (bfd *, struct bfd_link_info *, asection *, bfd_vma); +extern bfd_boolean _bfd_elf_write_section_eh_frame + (bfd *, struct bfd_link_info *, asection *, bfd_byte *); +extern bfd_boolean _bfd_elf_write_section_eh_frame_hdr + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_eh_frame_present + (struct bfd_link_info *); +extern bfd_boolean _bfd_elf_maybe_strip_eh_frame_hdr + (struct bfd_link_info *); + +extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); + +extern long _bfd_elf_link_lookup_local_dynindx + (struct bfd_link_info *, bfd *, long); +extern bfd_boolean _bfd_elf_compute_section_file_positions + (bfd *, struct bfd_link_info *); +extern void _bfd_elf_assign_file_positions_for_relocs + (bfd *); +extern file_ptr _bfd_elf_assign_file_position_for_section + (Elf_Internal_Shdr *, file_ptr, bfd_boolean); + +extern bfd_boolean _bfd_elf_validate_reloc + (bfd *, arelent *); + +extern bfd_boolean _bfd_elf_link_create_dynamic_sections + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_link_omit_section_dynsym + (bfd *, struct bfd_link_info *, asection *); +extern bfd_boolean _bfd_elf_create_dynamic_sections + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_create_got_section + (bfd *, struct bfd_link_info *); +extern struct elf_link_hash_entry *_bfd_elf_define_linkage_sym + (bfd *, struct bfd_link_info *, asection *, const char *); +extern void _bfd_elf_init_1_index_section + (bfd *, struct bfd_link_info *); +extern void _bfd_elf_init_2_index_sections + (bfd *, struct bfd_link_info *); + +extern bfd_boolean _bfd_elfcore_make_pseudosection + (bfd *, char *, size_t, ufile_ptr); +extern char *_bfd_elfcore_strndup + (bfd *, char *, size_t); + +extern Elf_Internal_Rela *_bfd_elf_link_read_relocs + (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); + +extern bfd_boolean _bfd_elf_link_output_relocs + (bfd *, asection *, Elf_Internal_Shdr *, Elf_Internal_Rela *, + struct elf_link_hash_entry **); + +extern bfd_boolean _bfd_elf_adjust_dynamic_copy + (struct elf_link_hash_entry *, asection *); + +extern bfd_boolean _bfd_elf_dynamic_symbol_p + (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); + +extern bfd_boolean _bfd_elf_symbol_refs_local_p + (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); + +extern bfd_reloc_status_type bfd_elf_perform_complex_relocation + (bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma); + +extern bfd_boolean _bfd_elf_setup_sections + (bfd *); + +extern void _bfd_elf_set_osabi (bfd * , struct bfd_link_info *); + +extern const bfd_target *bfd_elf32_object_p + (bfd *); +extern const bfd_target *bfd_elf32_core_file_p + (bfd *); +extern char *bfd_elf32_core_file_failing_command + (bfd *); +extern int bfd_elf32_core_file_failing_signal + (bfd *); +extern bfd_boolean bfd_elf32_core_file_matches_executable_p + (bfd *, bfd *); +extern int bfd_elf32_core_file_pid + (bfd *); + +extern bfd_boolean bfd_elf32_swap_symbol_in + (bfd *, const void *, const void *, Elf_Internal_Sym *); +extern void bfd_elf32_swap_symbol_out + (bfd *, const Elf_Internal_Sym *, void *, void *); +extern void bfd_elf32_swap_reloc_in + (bfd *, const bfd_byte *, Elf_Internal_Rela *); +extern void bfd_elf32_swap_reloc_out + (bfd *, const Elf_Internal_Rela *, bfd_byte *); +extern void bfd_elf32_swap_reloca_in + (bfd *, const bfd_byte *, Elf_Internal_Rela *); +extern void bfd_elf32_swap_reloca_out + (bfd *, const Elf_Internal_Rela *, bfd_byte *); +extern void bfd_elf32_swap_phdr_in + (bfd *, const Elf32_External_Phdr *, Elf_Internal_Phdr *); +extern void bfd_elf32_swap_phdr_out + (bfd *, const Elf_Internal_Phdr *, Elf32_External_Phdr *); +extern void bfd_elf32_swap_dyn_in + (bfd *, const void *, Elf_Internal_Dyn *); +extern void bfd_elf32_swap_dyn_out + (bfd *, const Elf_Internal_Dyn *, void *); +extern long bfd_elf32_slurp_symbol_table + (bfd *, asymbol **, bfd_boolean); +extern bfd_boolean bfd_elf32_write_shdrs_and_ehdr + (bfd *); +extern int bfd_elf32_write_out_phdrs + (bfd *, const Elf_Internal_Phdr *, unsigned int); +extern bfd_boolean bfd_elf32_checksum_contents + (bfd * , void (*) (const void *, size_t, void *), void *); +extern void bfd_elf32_write_relocs + (bfd *, asection *, void *); +extern bfd_boolean bfd_elf32_slurp_reloc_table + (bfd *, asection *, asymbol **, bfd_boolean); + +extern const bfd_target *bfd_elf64_object_p + (bfd *); +extern const bfd_target *bfd_elf64_core_file_p + (bfd *); +extern char *bfd_elf64_core_file_failing_command + (bfd *); +extern int bfd_elf64_core_file_failing_signal + (bfd *); +extern bfd_boolean bfd_elf64_core_file_matches_executable_p + (bfd *, bfd *); +extern int bfd_elf64_core_file_pid + (bfd *); + +extern bfd_boolean bfd_elf64_swap_symbol_in + (bfd *, const void *, const void *, Elf_Internal_Sym *); +extern void bfd_elf64_swap_symbol_out + (bfd *, const Elf_Internal_Sym *, void *, void *); +extern void bfd_elf64_swap_reloc_in + (bfd *, const bfd_byte *, Elf_Internal_Rela *); +extern void bfd_elf64_swap_reloc_out + (bfd *, const Elf_Internal_Rela *, bfd_byte *); +extern void bfd_elf64_swap_reloca_in + (bfd *, const bfd_byte *, Elf_Internal_Rela *); +extern void bfd_elf64_swap_reloca_out + (bfd *, const Elf_Internal_Rela *, bfd_byte *); +extern void bfd_elf64_swap_phdr_in + (bfd *, const Elf64_External_Phdr *, Elf_Internal_Phdr *); +extern void bfd_elf64_swap_phdr_out + (bfd *, const Elf_Internal_Phdr *, Elf64_External_Phdr *); +extern void bfd_elf64_swap_dyn_in + (bfd *, const void *, Elf_Internal_Dyn *); +extern void bfd_elf64_swap_dyn_out + (bfd *, const Elf_Internal_Dyn *, void *); +extern long bfd_elf64_slurp_symbol_table + (bfd *, asymbol **, bfd_boolean); +extern bfd_boolean bfd_elf64_write_shdrs_and_ehdr + (bfd *); +extern int bfd_elf64_write_out_phdrs + (bfd *, const Elf_Internal_Phdr *, unsigned int); +extern bfd_boolean bfd_elf64_checksum_contents + (bfd * , void (*) (const void *, size_t, void *), void *); +extern void bfd_elf64_write_relocs + (bfd *, asection *, void *); +extern bfd_boolean bfd_elf64_slurp_reloc_table + (bfd *, asection *, asymbol **, bfd_boolean); + +extern bfd_boolean _bfd_elf_default_relocs_compatible + (const bfd_target *, const bfd_target *); + +extern bfd_boolean _bfd_elf_relocs_compatible + (const bfd_target *, const bfd_target *); +extern bfd_boolean _bfd_elf_notice_as_needed + (bfd *, struct bfd_link_info *, enum notice_asneeded_action); + +extern struct elf_link_hash_entry *_bfd_elf_archive_symbol_lookup + (bfd *, struct bfd_link_info *, const char *); +extern bfd_boolean bfd_elf_link_add_symbols + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_add_dynamic_entry + (struct bfd_link_info *, bfd_vma, bfd_vma); + +extern bfd_boolean bfd_elf_link_record_dynamic_symbol + (struct bfd_link_info *, struct elf_link_hash_entry *); + +extern int bfd_elf_link_record_local_dynamic_symbol + (struct bfd_link_info *, bfd *, long); + +extern bfd_boolean _bfd_elf_close_and_cleanup + (bfd *); + +extern bfd_boolean _bfd_elf_common_definition + (Elf_Internal_Sym *); + +extern unsigned int _bfd_elf_common_section_index + (asection *); + +extern asection *_bfd_elf_common_section + (asection *); + +extern bfd_vma _bfd_elf_default_got_elt_size +(bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, + unsigned long); + +extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn + (bfd *, arelent *, struct bfd_symbol *, void *, + asection *, bfd *, char **); + +extern bfd_boolean bfd_elf_final_link + (bfd *, struct bfd_link_info *); + +extern void _bfd_elf_gc_keep + (struct bfd_link_info *info); + +extern bfd_boolean bfd_elf_gc_mark_dynamic_ref_symbol + (struct elf_link_hash_entry *h, void *inf); + +extern bfd_boolean bfd_elf_gc_sections + (bfd *, struct bfd_link_info *); + +extern bfd_boolean bfd_elf_gc_record_vtinherit + (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); + +extern bfd_boolean bfd_elf_gc_record_vtentry + (bfd *, asection *, struct elf_link_hash_entry *, bfd_vma); + +extern asection *_bfd_elf_gc_mark_hook + (asection *, struct bfd_link_info *, Elf_Internal_Rela *, + struct elf_link_hash_entry *, Elf_Internal_Sym *); + +extern asection *_bfd_elf_gc_mark_rsec + (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, + struct elf_reloc_cookie *); + +extern bfd_boolean _bfd_elf_gc_mark_reloc + (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, + struct elf_reloc_cookie *); + +extern bfd_boolean _bfd_elf_gc_mark_fdes + (struct bfd_link_info *, asection *, asection *, elf_gc_mark_hook_fn, + struct elf_reloc_cookie *); + +extern bfd_boolean _bfd_elf_gc_mark + (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn); + +extern bfd_boolean _bfd_elf_gc_mark_extra_sections + (struct bfd_link_info *, elf_gc_mark_hook_fn); + +extern bfd_boolean bfd_elf_gc_common_finalize_got_offsets + (bfd *, struct bfd_link_info *); + +extern bfd_boolean bfd_elf_gc_common_final_link + (bfd *, struct bfd_link_info *); + +extern bfd_boolean bfd_elf_reloc_symbol_deleted_p + (bfd_vma, void *); + +extern struct elf_segment_map * _bfd_elf_make_dynamic_segment + (bfd *, asection *); + +extern bfd_boolean _bfd_elf_map_sections_to_segments + (bfd *, struct bfd_link_info *); + +extern bfd_boolean _bfd_elf_is_function_type (unsigned int); + +extern bfd_size_type _bfd_elf_maybe_function_sym (const asymbol *, asection *, + bfd_vma *); + +extern int bfd_elf_get_default_section_type (flagword); + +extern bfd_boolean bfd_elf_lookup_section_flags + (struct bfd_link_info *, struct flag_info *, asection *); + +extern Elf_Internal_Phdr * _bfd_elf_find_segment_containing_section + (bfd * abfd, asection * section); + +/* Exported interface for writing elf corefile notes. */ +extern char *elfcore_write_note + (bfd *, char *, int *, const char *, int, const void *, int); +extern char *elfcore_write_prpsinfo + (bfd *, char *, int *, const char *, const char *); +extern char *elfcore_write_prstatus + (bfd *, char *, int *, long, int, const void *); +extern char * elfcore_write_pstatus + (bfd *, char *, int *, long, int, const void *); +extern char *elfcore_write_prfpreg + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_prxfpreg + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_xstatereg + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_ppc_vmx + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_ppc_vsx + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_timer + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_todcmp + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_todpreg + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_ctrs + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_prefix + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_last_break + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_system_call + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_s390_tdb + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_arm_vfp + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_aarch_tls + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_aarch_hw_break + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_aarch_hw_watch + (bfd *, char *, int *, const void *, int); +extern char *elfcore_write_lwpstatus + (bfd *, char *, int *, long, int, const void *); +extern char *elfcore_write_register_note + (bfd *, char *, int *, const char *, const void *, int); + +/* Internal structure which holds information to be included in the + PRPSINFO section of Linux core files. + + This is an "internal" structure in the sense that it should be used + to pass information to BFD (via the `elfcore_write_linux_prpsinfo' + function), so things like endianess shouldn't be an issue. This + structure will eventually be converted in one of the + `elf_external_linux_*' structures and written out to an output bfd + by one of the functions declared below. */ + +struct elf_internal_linux_prpsinfo + { + char pr_state; /* Numeric process state. */ + char pr_sname; /* Char for pr_state. */ + char pr_zomb; /* Zombie. */ + char pr_nice; /* Nice val. */ + unsigned long pr_flag; /* Flags. */ + unsigned int pr_uid; + unsigned int pr_gid; + int pr_pid, pr_ppid, pr_pgrp, pr_sid; + char pr_fname[16 + 1]; /* Filename of executable. */ + char pr_psargs[80 + 1]; /* Initial part of arg list. */ + }; + +/* Linux/most 32-bit archs. */ +extern char *elfcore_write_linux_prpsinfo32 + (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); + +/* Linux/most 64-bit archs. */ +extern char *elfcore_write_linux_prpsinfo64 + (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); + +/* Linux/PPC32 uses different layout compared to most archs. */ +extern char *elfcore_write_ppc_linux_prpsinfo32 + (bfd *, char *, int *, const struct elf_internal_linux_prpsinfo *); + +extern bfd *_bfd_elf32_bfd_from_remote_memory + (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, + int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); +extern bfd *_bfd_elf64_bfd_from_remote_memory + (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, + int (*target_read_memory) (bfd_vma, bfd_byte *, bfd_size_type)); + +extern bfd_vma bfd_elf_obj_attr_size (bfd *); +extern void bfd_elf_set_obj_attr_contents (bfd *, bfd_byte *, bfd_vma); +extern int bfd_elf_get_obj_attr_int (bfd *, int, int); +extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); +#define bfd_elf_add_proc_attr_int(BFD, TAG, VALUE) \ + bfd_elf_add_obj_attr_int ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) +extern void bfd_elf_add_obj_attr_string (bfd *, int, int, const char *); +#define bfd_elf_add_proc_attr_string(BFD, TAG, VALUE) \ + bfd_elf_add_obj_attr_string ((BFD), OBJ_ATTR_PROC, (TAG), (VALUE)) +extern void bfd_elf_add_obj_attr_int_string (bfd *, int, int, unsigned int, + const char *); +#define bfd_elf_add_proc_attr_int_string(BFD, TAG, INTVAL, STRVAL) \ + bfd_elf_add_obj_attr_int_string ((BFD), OBJ_ATTR_PROC, (TAG), \ + (INTVAL), (STRVAL)) + +extern char *_bfd_elf_attr_strdup (bfd *, const char *); +extern void _bfd_elf_copy_obj_attributes (bfd *, bfd *); +extern int _bfd_elf_obj_attrs_arg_type (bfd *, int, int); +extern void _bfd_elf_parse_attributes (bfd *, Elf_Internal_Shdr *); +extern bfd_boolean _bfd_elf_merge_object_attributes (bfd *, bfd *); +extern bfd_boolean _bfd_elf_merge_unknown_attribute_low (bfd *, bfd *, int); +extern bfd_boolean _bfd_elf_merge_unknown_attribute_list (bfd *, bfd *); +extern Elf_Internal_Shdr *_bfd_elf_single_rel_hdr (asection *sec); + +/* The linker may need to keep track of the number of relocs that it + decides to copy as dynamic relocs in check_relocs for each symbol. + This is so that it can later discard them if they are found to be + unnecessary. We can store the information in a field extending the + regular ELF linker hash table. */ + +struct elf_dyn_relocs +{ + struct elf_dyn_relocs *next; + + /* The input section of the reloc. */ + asection *sec; + + /* Total number of relocs copied for the input section. */ + bfd_size_type count; + + /* Number of pc-relative relocs copied for the input section. */ + bfd_size_type pc_count; +}; + +extern bfd_boolean _bfd_elf_create_ifunc_sections + (bfd *, struct bfd_link_info *); +extern bfd_boolean _bfd_elf_allocate_ifunc_dyn_relocs + (struct bfd_link_info *, struct elf_link_hash_entry *, + struct elf_dyn_relocs **, unsigned int, unsigned int, unsigned int); + +extern void elf_append_rela (bfd *, asection *, Elf_Internal_Rela *); +extern void elf_append_rel (bfd *, asection *, Elf_Internal_Rela *); + +extern bfd_vma elf64_r_info (bfd_vma, bfd_vma); +extern bfd_vma elf64_r_sym (bfd_vma); +extern bfd_vma elf32_r_info (bfd_vma, bfd_vma); +extern bfd_vma elf32_r_sym (bfd_vma); + +/* Large common section. */ +extern asection _bfd_elf_large_com_section; + +/* Hash for local symbol with the first section id, ID, in the input + file and the local symbol index, SYM. */ +#define ELF_LOCAL_SYMBOL_HASH(ID, SYM) \ + (((((ID) & 0xff) << 24) | (((ID) & 0xff00) << 8)) \ + ^ (SYM) ^ ((ID) >> 16)) + +/* This is the condition under which finish_dynamic_symbol will be called. + If our finish_dynamic_symbol isn't called, we'll need to do something + about initializing any .plt and .got entries in relocate_section. */ +#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ + ((DYN) \ + && ((SHARED) || !(H)->forced_local) \ + && ((H)->dynindx != -1 || (H)->forced_local)) + +/* This macro is to avoid lots of duplicated code in the body + of xxx_relocate_section() in the various elfxx-xxxx.c files. */ +#define RELOC_FOR_GLOBAL_SYMBOL(info, input_bfd, input_section, rel, \ + r_symndx, symtab_hdr, sym_hashes, \ + h, sec, relocation, \ + unresolved_reloc, warned) \ + do \ + { \ + /* It seems this can happen with erroneous or unsupported \ + input (mixing a.out and elf in an archive, for example.) */ \ + if (sym_hashes == NULL) \ + return FALSE; \ + \ + h = sym_hashes[r_symndx - symtab_hdr->sh_info]; \ + \ + while (h->root.type == bfd_link_hash_indirect \ + || h->root.type == bfd_link_hash_warning) \ + h = (struct elf_link_hash_entry *) h->root.u.i.link; \ + \ + warned = FALSE; \ + unresolved_reloc = FALSE; \ + relocation = 0; \ + if (h->root.type == bfd_link_hash_defined \ + || h->root.type == bfd_link_hash_defweak) \ + { \ + sec = h->root.u.def.section; \ + if (sec == NULL \ + || sec->output_section == NULL) \ + /* Set a flag that will be cleared later if we find a \ + relocation value for this symbol. output_section \ + is typically NULL for symbols satisfied by a shared \ + library. */ \ + unresolved_reloc = TRUE; \ + else \ + relocation = (h->root.u.def.value \ + + sec->output_section->vma \ + + sec->output_offset); \ + } \ + else if (h->root.type == bfd_link_hash_undefweak) \ + ; \ + else if (info->unresolved_syms_in_objects == RM_IGNORE \ + && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT) \ + ; \ + else if (!info->relocatable) \ + { \ + bfd_boolean err; \ + err = (info->unresolved_syms_in_objects == RM_GENERATE_ERROR \ + || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT); \ + if (!info->callbacks->undefined_symbol (info, \ + h->root.root.string, \ + input_bfd, \ + input_section, \ + rel->r_offset, err)) \ + return FALSE; \ + warned = TRUE; \ + } \ + (void) unresolved_reloc; \ + (void) warned; \ + } \ + while (0) + +/* This macro is to avoid lots of duplicated code in the body of the + loop over relocations in xxx_relocate_section() in the various + elfxx-xxxx.c files. + + Handle relocations against symbols from removed linkonce sections, + or sections discarded by a linker script. When doing a relocatable + link, we remove such relocations. Otherwise, we just want the + section contents zeroed and avoid any special processing. */ +#define RELOC_AGAINST_DISCARDED_SECTION(info, input_bfd, input_section, \ + rel, count, relend, \ + howto, index, contents) \ + { \ + int i_; \ + _bfd_clear_contents (howto, input_bfd, input_section, \ + contents + rel[index].r_offset); \ + \ + if (info->relocatable \ + && (input_section->flags & SEC_DEBUGGING)) \ + { \ + /* Only remove relocations in debug sections since other \ + sections may require relocations. */ \ + Elf_Internal_Shdr *rel_hdr; \ + \ + rel_hdr = _bfd_elf_single_rel_hdr (input_section->output_section); \ + \ + /* Avoid empty output section. */ \ + if (rel_hdr->sh_size > rel_hdr->sh_entsize) \ + { \ + rel_hdr->sh_size -= rel_hdr->sh_entsize; \ + rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ + rel_hdr->sh_size -= rel_hdr->sh_entsize; \ + \ + memmove (rel, rel + count, \ + (relend - rel - count) * sizeof (*rel)); \ + \ + input_section->reloc_count--; \ + relend -= count; \ + rel--; \ + continue; \ + } \ + } \ + \ + for (i_ = 0; i_ < count; i_++) \ + { \ + rel[i_].r_info = 0; \ + rel[i_].r_addend = 0; \ + } \ + rel += count - 1; \ + continue; \ + } + +/* Will a symbol be bound to the definition within the shared + library, if any. A unique symbol can never be bound locally. */ +#define SYMBOLIC_BIND(INFO, H) \ + (!(H)->unique_global \ + && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) + +#endif /* _LIBELF_H_ */ |