/* 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 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
#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
/* Structures used by the eh_frame optimization code. */
struct eh_cie_fde
{
- /* For FDEs, this points to the CIE used. */
- struct eh_cie_fde *cie_inf;
+ 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;
+
+ /* 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;
unsigned int size;
unsigned int offset;
unsigned int new_offset;
- unsigned char fde_encoding;
- unsigned char lsda_encoding;
- unsigned char lsda_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;
- 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];
};
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. */
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. */
/* 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
(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)
/* 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. */
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;
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. */
/* A pointer to the bfd section used for dynamic relocs. */
asection *sreloc;
+ /* A pointer to the bfd section used for dynamic relocs against ifunc symbols. */
+ asection *indirect_relocs;
+
union {
/* Group name, if this section is a member of a group. */
const char *name;
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_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) \
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. */
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. */
/* 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)
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);
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 *);
(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 asection * _bfd_elf_make_ifunc_reloc_section
+ (bfd *, asection *, bfd *, unsigned int);
extern long _bfd_elf_get_dynamic_reloc_upper_bound
(bfd *);
extern long _bfd_elf_canonicalize_dynamic_reloc
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_symbol_refs_local_p
(struct elf_link_hash_entry *, struct bfd_link_info *, bfd_boolean);
-extern bfd_boolean bfd_elf_match_symbols_in_sections
- (asection *, asection *, struct bfd_link_info *);
-
-extern void bfd_elf_perform_complex_relocation
+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
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 **);
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);
(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 *,
- asection * (*) (asection *, struct bfd_link_info *, Elf_Internal_Rela *,
- struct elf_link_hash_entry *, Elf_Internal_Sym *));
+ (struct bfd_link_info *, asection *, 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_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);
(bfd *, char *, int *, const void *, int);
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,
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