X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Felf-bfd.h;h=c1cc63e8dfeb63fa42eb2f9989f85d0c3eef682e;hb=28caa1861d3c213026143c94ec6e82d7ec90c09c;hp=c91af27639e8bdf8aa075ce4715cea78b9fb59be;hpb=ca92cecbbead0c883df57e70fdb5b2541febd43b;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/elf-bfd.h b/bfd/elf-bfd.h index c91af27639..c1cc63e8df 100644 --- a/bfd/elf-bfd.h +++ b/bfd/elf-bfd.h @@ -1,6 +1,7 @@ /* 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 Free Software Foundation, Inc. + 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 + Free Software Foundation, Inc. Written by Cygnus Support. This file is part of BFD, the Binary File Descriptor library. @@ -24,8 +25,8 @@ #define _LIBELF_H_ 1 #include "elf/common.h" -#include "elf/internal.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 @@ -273,14 +274,43 @@ struct eh_cie_fde 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 { - /* In general, equivalent CIEs are grouped together, with one CIE - representing all the others in a group. If REMOVED == 0, - this CIE is the group representative. If REMOVED == 1, - following this pointer brings us "closer" to the CIE's group - representative, and reapplying always gives the representative. */ - struct eh_cie_fde *merged; + /* 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; + + /* 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 the CIE contains personality data and if that data + uses a PC-relative encoding. */ + 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; } cie; } u; unsigned int reloc_index; @@ -290,20 +320,32 @@ struct eh_cie_fde 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; - unsigned int add_fde_encoding : 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; - unsigned int make_lsda_relative : 1; - unsigned int need_lsda_relative : 1; - unsigned int per_encoding_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]; }; @@ -321,13 +363,14 @@ struct eh_frame_hdr_info 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; - bfd_boolean offsets_adjusted; }; /* ELF linker hash table. */ @@ -552,7 +595,7 @@ struct bfd_elf_special_section PREFIX and finish with the last SUFFIX_LENGTH chars of PREFIX. */ int suffix_length; int type; - int attr; + bfd_vma attr; }; enum action_discarded @@ -873,10 +916,15 @@ struct elf_backend_data 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 *h, void *inf); + (struct elf_link_hash_entry *, void *); /* This function is called during section gc to discover the section a particular relocation refers to. */ @@ -885,14 +933,13 @@ struct elf_backend_data /* 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 *info, elf_gc_mark_hook_fn gc_mark_hook); + (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 *abfd, struct bfd_link_info *info, asection *o, - const Elf_Internal_Rela *relocs); + (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 @@ -947,6 +994,11 @@ struct elf_backend_data (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) @@ -961,7 +1013,7 @@ struct elf_backend_data /* Count relocations. Not called for relocatable links or if all relocs are being preserved in the output. */ unsigned int (*elf_backend_count_relocs) - (asection *, Elf_Internal_Rela *); + (struct bfd_link_info *, asection *); /* This function, if defined, is called when an NT_PRSTATUS note is found in a core file. */ @@ -1096,6 +1148,12 @@ struct elf_backend_data 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; @@ -1109,6 +1167,12 @@ 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. */ + int (*obj_attrs_order) (int); + /* 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 @@ -1138,6 +1202,9 @@ struct elf_backend_data 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. */ @@ -1243,6 +1310,10 @@ struct bfd_elf_section_data 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; }; @@ -1254,6 +1325,7 @@ struct bfd_elf_section_data #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) \ @@ -1262,55 +1334,23 @@ 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 maximum number of known object attributes for any target. */ -#define NUM_KNOWN_OBJ_ATTRIBUTES 32 +#define NUM_KNOWN_OBJ_ATTRIBUTES 71 -/* The value of an object attribute. type & 1 indicates whether there - is an integer value; type & 2 indicates whether there is a string - value. */ +/* 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; @@ -1342,6 +1382,27 @@ 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 +{ + 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 +}; + /* Some private data is stashed away for future use using the tdata pointer in the bfd structure. */ @@ -1459,6 +1520,9 @@ struct elf_obj_tdata asection *elf_data_section; asection *elf_text_section; + /* A pointer to the .eh_frame section. */ + asection *eh_frame_section; + /* 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. */ @@ -1491,19 +1555,29 @@ struct elf_obj_tdata /* NT_GNU_BUILD_ID note type. */ bfd_size_type build_id_size; bfd_byte *build_id; + + /* An identifier used to distinguish different target + specific extensions to this structure. */ + enum elf_object_id object_id; }; #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) -> 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_shstrtab(bfd) (elf_tdata(bfd) -> strtab_ptr) #define elf_onesymtab(bfd) (elf_tdata(bfd) -> symtab_section) #define elf_symtab_shndx(bfd) (elf_tdata(bfd) -> symtab_shndx_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_num_locals(bfd) (elf_tdata(bfd) -> num_locals) #define elf_num_globals(bfd) (elf_tdata(bfd) -> num_globals) #define elf_section_syms(bfd) (elf_tdata(bfd) -> section_syms) @@ -1548,7 +1622,7 @@ extern void _bfd_elf_swap_versym_in extern void _bfd_elf_swap_versym_out (bfd *, const Elf_Internal_Versym *, Elf_External_Versym *); -extern int _bfd_elf_section_from_bfd_section +extern unsigned int _bfd_elf_section_from_bfd_section (bfd *, asection *); extern char *bfd_elf_string_from_elf_section (bfd *, unsigned, unsigned); @@ -1591,7 +1665,9 @@ 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_mkobject +extern bfd_boolean bfd_elf_allocate_object + (bfd *, size_t, enum elf_object_id); +extern bfd_boolean bfd_elf_make_generic_object (bfd *); extern bfd_boolean bfd_elf_mkcorefile (bfd *); @@ -1663,6 +1739,10 @@ 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 @@ -1767,20 +1847,6 @@ extern bfd_boolean _bfd_elf_merge_symbol 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 @@ -1816,25 +1882,13 @@ 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); @@ -1956,10 +2010,6 @@ 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 *); @@ -1975,6 +2025,10 @@ extern asection *_bfd_elf_common_section 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); + extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn (bfd *, arelent *, struct bfd_symbol *, void *, asection *, bfd *, char **); @@ -1982,6 +2036,9 @@ extern bfd_reloc_status_type _bfd_elf_rel_vtable_reloc_fn 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); @@ -2004,7 +2061,11 @@ extern asection *_bfd_elf_gc_mark_rsec extern bfd_boolean _bfd_elf_gc_mark_reloc (struct bfd_link_info *, asection *, elf_gc_mark_hook_fn, - struct elf_reloc_cookie *, bfd_boolean); + 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); @@ -2026,6 +2087,9 @@ extern bfd_boolean _bfd_elf_map_sections_to_segments extern bfd_boolean _bfd_elf_is_function_type (unsigned int); +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); @@ -2041,8 +2105,12 @@ extern char *elfcore_write_prxfpreg (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_lwpstatus (bfd *, char *, int *, long, int, const void *); +extern char *elfcore_write_register_note + (bfd *, char *, int *, const char *, const void *, int); extern bfd *_bfd_elf32_bfd_from_remote_memory (bfd *templ, bfd_vma ehdr_vma, bfd_vma *loadbasep, @@ -2060,10 +2128,11 @@ extern void bfd_elf_add_obj_attr_int (bfd *, int, int, unsigned int); 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_compat (bfd *, int, unsigned int, - const char *); -#define bfd_elf_add_proc_attr_compat(BFD, INTVAL, STRVAL) \ - bfd_elf_add_obj_attr_compat ((BFD), OBJ_ATTR_PROC, (INTVAL), (STRVAL)) +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 *);