X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=bfd%2Felf-bfd.h;h=a93e0d40133a1e377f046c0dfff6b2f57719adcf;hb=9f7c3e5e99a620b68f6b2d0f3b17329e40b8d781;hp=35dc0180f865b0e41038c3fd1a0148d2867c6ddc;hpb=5aa6ff7ca4d5209dece43cf89fa5750f5dcaa033;p=binutils-gdb.git diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index 35dc0180f86..a93e0d40133 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1,6 +1,6 @@ /* BFD back-end data structures for ELF files. Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, - 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 + 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Free Software Foundation, Inc. Written by Cygnus Support. @@ -31,8 +31,11 @@ /* 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. */ -#define NUM_SHDR_ENTRIES(shdr) ((shdr)->sh_size / (shdr)->sh_entsize) + 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 @@ -82,6 +85,27 @@ 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 @@ -115,13 +139,7 @@ struct elf_link_hash_entry 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 - { - bfd_signed_vma refcount; - bfd_vma offset; - struct got_entry *glist; - struct plt_entry *plist; - } got; + union gotplt_union got; /* Same, but tracks a procedure linkage table entry. */ union gotplt_union plt; @@ -135,7 +153,11 @@ struct elf_link_hash_entry /* Symbol st_other value, symbol visibility. */ unsigned int other : 8; - /* Symbol is referenced by a non-shared object. */ + /* 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; @@ -143,7 +165,8 @@ struct elf_link_hash_entry 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. */ + /* 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; @@ -168,11 +191,13 @@ struct elf_link_hash_entry 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 is weak in all shared objects. */ - unsigned int dynamic_weak : 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; @@ -203,26 +228,11 @@ struct elf_link_hash_entry struct bfd_elf_version_tree *vertree; } verinfo; - struct - { - /* 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; - } *vtable; + struct elf_link_virtual_table_entry *vtable; }; /* Will references to this symbol always reference the symbol - in this object? STV_PROTECTED is excluded from the visibility test - here so that function pointer comparisons work properly. Since - function symbols not defined in an app are set to their .plt entry, - it's necessary for shared libs to also reference the .plt even - though the symbol is really local to the shared lib. */ + in this object? */ #define SYMBOL_REFERENCES_LOCAL(INFO, H) \ _bfd_elf_symbol_refs_local_p (H, INFO, 0) @@ -294,6 +304,10 @@ struct eh_cie_fde 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; @@ -301,8 +315,13 @@ struct eh_cie_fde a PC-relative one. */ unsigned int make_lsda_relative : 1; - /* True if the CIE contains personality data and if that data - uses a PC-relative encoding. */ + /* 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 @@ -311,6 +330,9 @@ struct eh_cie_fde /* 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; @@ -373,12 +395,58 @@ struct eh_frame_hdr_info 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; @@ -432,6 +500,9 @@ struct elf_link_hash_table /* 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; @@ -454,6 +525,17 @@ struct elf_link_hash_table /* 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. */ @@ -475,18 +557,20 @@ struct elf_link_hash_table #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_section_from_r_symndx to cache a small number of local - symbol to section mappings. */ +/* Used by bfd_sym_from_r_symndx to cache a small number of local + symbols. */ #define LOCAL_SYM_CACHE_SIZE 32 -struct sym_sec_cache +struct sym_cache { bfd *abfd; unsigned long indx[LOCAL_SYM_CACHE_SIZE]; - unsigned int shndx[LOCAL_SYM_CACHE_SIZE]; + Elf_Internal_Sym sym[LOCAL_SYM_CACHE_SIZE]; }; /* Constant information held for an ELF backend. */ @@ -613,6 +697,10 @@ 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; @@ -633,6 +721,10 @@ struct elf_backend_data /* 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) @@ -742,8 +834,10 @@ struct elf_backend_data 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. */ - bfd_boolean (*elf_backend_link_output_symbol_hook) + 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 *); @@ -1029,6 +1123,11 @@ struct elf_backend_data 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 Elf_Internal_Rela *); @@ -1093,7 +1192,8 @@ struct elf_backend_data 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, int len)); + 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. */ @@ -1129,6 +1229,12 @@ struct elf_backend_data /* 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; @@ -1167,12 +1273,23 @@ struct elf_backend_data /* 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 4..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. */ + /* 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 @@ -1236,6 +1353,23 @@ struct elf_backend_data 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. */ @@ -1244,31 +1378,16 @@ struct bfd_elf_section_data /* The ELF header for this section. */ Elf_Internal_Shdr this_hdr; - /* The ELF header for the reloc section associated with this - section, if any. */ - Elf_Internal_Shdr rel_hdr; - - /* If there is a second reloc section associated with this section, - as can happen on Irix 6, this field points to the header. */ - Elf_Internal_Shdr *rel_hdr2; + /* INPUT_SECTION_FLAGS if specified in the linker script. */ + struct flag_info *section_flag_info; - /* The number of relocations currently assigned to REL_HDR. */ - unsigned int rel_count; - - /* The number of relocations currently assigned to REL_HDR2. */ - unsigned int rel_count2; + /* 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; - /* The ELF section number of the reloc section indicated by - REL_HDR if any. Only used for an output file. */ - int rel_idx; - - /* The ELF section number of the reloc section indicated by - REL_HDR2 if any. Only used for an output file. */ - int rel_idx2; - /* 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 @@ -1278,10 +1397,6 @@ struct bfd_elf_section_data /* A pointer to the linked-to section for SHF_LINK_ORDER. */ asection *linked_to; - /* Used by the backend linker to store the symbol hash table entries - associated with relocs against global symbols. */ - struct elf_link_hash_entry **rel_hashes; - /* 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. */ @@ -1318,14 +1433,14 @@ struct bfd_elf_section_data void *sec_info; }; -#define elf_section_data(sec) ((struct bfd_elf_section_data*)(sec)->used_by_bfd) +#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_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) \ @@ -1334,45 +1449,11 @@ struct bfd_elf_section_data #define get_elf_backend_data(abfd) \ xvec_get_elf_backend_data ((abfd)->xvec) -/* This struct is used to pass information to routines called via - elf_link_hash_traverse which must return failure. */ - -struct elf_info_failed -{ - bfd_boolean failed; - struct bfd_link_info *info; - struct bfd_elf_version_tree *verdefs; -}; - -/* This structure is used to pass information to - _bfd_elf_link_assign_sym_version. */ - -struct elf_assign_sym_version_info -{ - /* Output BFD. */ - bfd *output_bfd; - /* General link information. */ - struct bfd_link_info *info; - /* Version tree. */ - struct bfd_elf_version_tree *verdefs; - /* Whether we had a failure. */ - bfd_boolean failed; -}; - -/* This structure is used to pass information to - _bfd_elf_link_find_version_dependencies. */ - -struct elf_find_verdep_info -{ - /* Output BFD. */ - bfd *output_bfd; - /* General link information. */ - struct bfd_link_info *info; - /* The number of dependencies. */ - unsigned int vers; - /* Whether we had a failure. */ - bfd_boolean failed; -}; +/* 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 @@ -1422,25 +1503,13 @@ enum Tag_compatibility = 32 }; -/* Enum used to identify target specific extensions to the elf_obj_tdata - structure. 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_object_id +/* The following struct stores information about every SystemTap section + found in the object file. */ +struct sdt_note { - ALPHA_ELF_TDATA = 1, - ARM_ELF_TDATA, - HPPA_ELF_TDATA, - I386_ELF_TDATA, - MIPS_ELF_TDATA, - PPC32_ELF_TDATA, - PPC64_ELF_TDATA, - S390_ELF_TDATA, - SH_ELF_TDATA, - SPARC_ELF_TDATA, - X86_64_ELF_TDATA, - XTENSA_ELF_TDATA, - GENERIC_ELF_TDATA + struct sdt_note *next; + bfd_size_type size; + bfd_byte data[1]; }; /* Some private data is stashed away for future use using the tdata pointer @@ -1507,6 +1576,10 @@ struct elf_obj_tdata one. */ const char *dt_name; + /* The linker emulation needs to know what audit libs + are used by a dynamic object. */ + const char *dt_audit; + /* Records the result of `get_program_header_size'. */ bfd_size_type program_header_size; @@ -1525,6 +1598,9 @@ struct elf_obj_tdata /* 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; + /* An array of stub sections indexed by symbol number, used by the MIPS ELF linker. FIXME: We should figure out some way to only include this field for a MIPS ELF target. */ @@ -1596,9 +1672,19 @@ struct elf_obj_tdata bfd_size_type build_id_size; bfd_byte *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; + + /* 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; + /* An identifier used to distinguish different target specific extensions to this structure. */ - enum elf_object_id object_id; + enum elf_target_id object_id; }; #define elf_tdata(bfd) ((bfd) -> tdata.elf_obj_data) @@ -1631,6 +1717,7 @@ struct elf_obj_tdata #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) -> flags_init) @@ -1666,8 +1753,6 @@ extern unsigned int _bfd_elf_section_from_bfd_section (bfd *, asection *); extern char *bfd_elf_string_from_elf_section (bfd *, unsigned, unsigned); -extern char *bfd_elf_get_str_section - (bfd *, 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 *); @@ -1706,13 +1791,11 @@ extern unsigned long bfd_elf_gnu_hash 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_object_id); -extern bfd_boolean bfd_elf_make_generic_object + (bfd *, size_t, enum elf_target_id); +extern bfd_boolean bfd_elf_make_object (bfd *); extern bfd_boolean bfd_elf_mkcorefile (bfd *); -extern Elf_Internal_Shdr *bfd_elf_find_section - (bfd *, char *); 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 @@ -1721,6 +1804,8 @@ 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 *); @@ -1732,7 +1817,7 @@ 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); + unsigned int, enum elf_target_id); extern bfd_boolean _bfd_elf_slurp_version_tables (bfd *, bfd_boolean); extern bfd_boolean _bfd_elf_merge_sections @@ -1741,14 +1826,19 @@ 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 void _bfd_elf_section_already_linked - (bfd *, struct bfd_section *, struct bfd_link_info *); +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 *); -extern void _bfd_elf_link_just_syms - (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 @@ -1800,9 +1890,16 @@ extern bfd_boolean _bfd_elf_set_arch_mach 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 @@ -1812,7 +1909,7 @@ extern int _bfd_elf_sizeof_headers extern bfd_boolean _bfd_elf_new_section_hook (bfd *, asection *); extern bfd_boolean _bfd_elf_init_reloc_shdr - (bfd *, Elf_Internal_Shdr *, asection *, bfd_boolean); + (bfd *, struct bfd_elf_section_reloc_data *, asection *, bfd_boolean); 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 @@ -1830,8 +1927,8 @@ extern bfd_boolean bfd_section_from_phdr extern int _bfd_elf_symbol_from_bfd_symbol (bfd *, asymbol **); -extern asection *bfd_section_from_r_symndx - (bfd *, struct sym_sec_cache *, asection *, unsigned long); +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 @@ -1847,8 +1944,12 @@ 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 void _bfd_elf_strtab_clear_all_refs - (struct elf_strtab_hash *); +extern unsigned int _bfd_elf_strtab_refcount + (struct elf_strtab_hash *, bfd_size_type); +extern void _bfd_elf_strtab_clear_refs + (struct elf_strtab_hash *, bfd_size_type); +#define _bfd_elf_strtab_clear_all_refs(tab) \ + do { _bfd_elf_strtab_clear_refs (tab, 1); } while (0) extern bfd_size_type _bfd_elf_strtab_size (struct elf_strtab_hash *); extern bfd_size_type _bfd_elf_strtab_offset @@ -1876,31 +1977,19 @@ 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_merge_symbol (bfd *, struct bfd_link_info *, const char *, Elf_Internal_Sym *, - asection **, bfd_vma *, unsigned int *, + asection **, bfd_vma *, bfd_boolean *, unsigned int *, struct elf_link_hash_entry **, bfd_boolean *, bfd_boolean *, bfd_boolean *, bfd_boolean *); extern bfd_boolean _bfd_elf_hash_symbol (struct elf_link_hash_entry *); -extern bfd_boolean _bfd_elf_add_default_symbol - (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, - const char *, Elf_Internal_Sym *, asection **, bfd_vma *, - bfd_boolean *, bfd_boolean); - -extern bfd_boolean _bfd_elf_export_symbol - (struct elf_link_hash_entry *, void *); - -extern bfd_boolean _bfd_elf_link_find_version_dependencies - (struct elf_link_hash_entry *, void *); - -extern bfd_boolean _bfd_elf_link_assign_sym_version - (struct elf_link_hash_entry *, void *); - extern long _bfd_elf_link_lookup_local_dynindx (struct bfd_link_info *, bfd *, long); extern bfd_boolean _bfd_elf_compute_section_file_positions @@ -1936,25 +2025,13 @@ extern char *_bfd_elfcore_strndup extern Elf_Internal_Rela *_bfd_elf_link_read_relocs (bfd *, asection *, void *, Elf_Internal_Rela *, bfd_boolean); -extern bfd_boolean _bfd_elf_link_size_reloc_section - (bfd *, Elf_Internal_Shdr *, asection *); - 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_fix_symbol_flags - (struct elf_link_hash_entry *, struct elf_info_failed *); - -extern bfd_boolean _bfd_elf_adjust_dynamic_symbol - (struct elf_link_hash_entry *, void *); - extern bfd_boolean _bfd_elf_adjust_dynamic_copy (struct elf_link_hash_entry *, asection *); -extern bfd_boolean _bfd_elf_link_sec_merge_syms - (struct elf_link_hash_entry *, void *); - extern bfd_boolean _bfd_elf_dynamic_symbol_p (struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean); @@ -1979,6 +2056,8 @@ 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 *); @@ -2023,6 +2102,8 @@ 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 *); @@ -2076,10 +2157,6 @@ extern bfd_boolean bfd_elf_link_record_dynamic_symbol extern int bfd_elf_link_record_local_dynamic_symbol (struct bfd_link_info *, bfd *, long); -extern void bfd_elf_link_mark_dynamic_symbol - (struct bfd_link_info *, struct elf_link_hash_entry *, - Elf_Internal_Sym *); - extern bfd_boolean _bfd_elf_close_and_cleanup (bfd *); @@ -2092,9 +2169,6 @@ extern unsigned int _bfd_elf_common_section_index extern asection *_bfd_elf_common_section (asection *); -extern void _bfd_dwarf2_cleanup_debug_info - (bfd *); - extern bfd_vma _bfd_elf_default_got_elt_size (bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, bfd *, unsigned long); @@ -2140,6 +2214,9 @@ extern bfd_boolean _bfd_elf_gc_mark_fdes 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 *); @@ -2157,6 +2234,14 @@ extern bfd_boolean _bfd_elf_map_sections_to_segments 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); @@ -2173,21 +2258,81 @@ 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_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 *, int)); + 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 *, int)); + 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); @@ -2209,14 +2354,55 @@ 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 asection * _bfd_elf_create_ifunc_dyn_reloc + (bfd *, struct bfd_link_info *, asection *sec, asection *sreloc, + struct elf_dyn_relocs **); +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); + +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; -/* SH ELF specific routine. */ - -extern bfd_boolean _sh_elf_set_mach_from_flags - (bfd *); +/* 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 @@ -2282,12 +2468,66 @@ extern bfd_boolean _sh_elf_set_mach_from_flags return FALSE; \ warned = TRUE; \ } \ + (void) unresolved_reloc; \ + (void) warned; \ } \ while (0) -/* Will a symbol be bound to the the definition within the shared - library, if any. */ +/* 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 > count * rel_hdr->sh_entsize) \ + { \ + rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \ + rel_hdr = _bfd_elf_single_rel_hdr (input_section); \ + rel_hdr->sh_size -= count * rel_hdr->sh_entsize; \ + \ + memmove (rel, rel + count, \ + (relend - rel - count) * sizeof (*rel)); \ + \ + input_section->reloc_count -= 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) \ - ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic)) + (!(H)->unique_global \ + && ((INFO)->symbolic || ((INFO)->dynamic && !(H)->dynamic))) #endif /* _LIBELF_H_ */