/* bfdlink.h -- header file for BFD link routines
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
+ Free Software Foundation, Inc.
Written by Steve Chamberlain and Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
bfd_link_hash_warning /* Like indirect, but warn if referenced. */
};
-enum bfd_link_common_skip_ar_aymbols
+enum bfd_link_common_skip_ar_symbols
{
bfd_link_common_skip_none,
bfd_link_common_skip_text,
bfd_link_common_skip_all
};
+struct bfd_link_hash_common_entry
+ {
+ unsigned int alignment_power; /* Alignment. */
+ asection *section; /* Symbol section. */
+ };
+
/* The linking routines use a hash table which uses this structure for
its elements. */
struct bfd_hash_entry root;
/* Type of this entry. */
- enum bfd_link_hash_type type;
+ ENUM_BITFIELD (bfd_link_hash_type) type : 8;
+
+ unsigned int non_ir_ref : 1;
/* A union of information depending upon the type. */
union
undefined symbol list. */
struct bfd_link_hash_entry *next;
bfd *abfd; /* BFD symbol was found in. */
- bfd *weak; /* BFD weak symbol was found in. */
} undef;
/* bfd_link_hash_defined, bfd_link_hash_defweak. */
struct
directly because we don't want to increase the size of
the union; this structure is a major space user in the
linker. */
- struct bfd_link_hash_common_entry
- {
- unsigned int alignment_power; /* Alignment. */
- asection *section; /* Symbol section. */
- } *p;
+ struct bfd_link_hash_common_entry *p;
bfd_size_type size; /* Common symbol size. */
} c;
} u;
extern void bfd_link_repair_undef_list
(struct bfd_link_hash_table *table);
+/* Read symbols and cache symbol pointer array in outsymbols. */
+extern bfd_boolean bfd_generic_link_read_symbols (bfd *);
+
struct bfd_sym_chain
{
struct bfd_sym_chain *next;
RM_GENERATE_ERROR
};
+typedef enum {with_flags, without_flags} flag_type;
+
+/* A section flag list. */
+struct flag_info_list
+{
+ flag_type with;
+ const char *name;
+ bfd_boolean valid;
+ struct flag_info_list *next;
+};
+
+/* Section flag info. */
+struct flag_info
+{
+ flagword only_with_flags;
+ flagword not_with_flags;
+ struct flag_info_list *flag_list;
+ bfd_boolean flags_initialized;
+};
+
struct bfd_elf_dynamic_list;
+struct bfd_elf_version_tree;
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
struct bfd_link_info
{
- /* TRUE if BFD should generate a relocatable object file. */
- unsigned int relocatable: 1;
+ /* TRUE if BFD should generate a shared object (or a pie). */
+ unsigned int shared: 1;
- /* TRUE if BFD should generate relocation information in the final
- executable. */
- unsigned int emitrelocations: 1;
+ /* TRUE if generating an executable, position independent or not. */
+ unsigned int executable : 1;
- /* TRUE if BFD should generate a "task linked" object file,
- similar to relocatable but also with globals converted to
- statics. */
- unsigned int task_link: 1;
+ /* TRUE if generating a position independent executable. */
+ unsigned int pie: 1;
- /* TRUE if BFD should generate a shared object. */
- unsigned int shared: 1;
+ /* TRUE if BFD should generate a relocatable object file. */
+ unsigned int relocatable: 1;
/* TRUE if BFD should pre-bind symbols in a shared object. */
unsigned int symbolic: 1;
+ /* TRUE if executable should not contain copy relocs.
+ Setting this true may result in a non-sharable text segment. */
+ unsigned int nocopyreloc: 1;
+
/* TRUE if BFD should export all symbols in the dynamic symbol table
of an executable, rather than only those used. */
unsigned int export_dynamic: 1;
- /* TRUE if shared objects should be linked directly, not shared. */
- unsigned int static_link: 1;
-
- /* TRUE if the output file should be in a traditional format. This
- is equivalent to the setting of the BFD_TRADITIONAL_FORMAT flag
- on the output file, but may be checked when reading the input
- files. */
- unsigned int traditional_format: 1;
-
- /* TRUE if we want to produced optimized output files. This might
- need much more time and therefore must be explicitly selected. */
- unsigned int optimize: 1;
-
- /* TRUE if ok to have multiple definition. */
- unsigned int allow_multiple_definition: 1;
-
- /* TRUE if ok to have version with no definition. */
- unsigned int allow_undefined_version: 1;
-
/* TRUE if a default symbol version should be created and used for
exported symbols. */
unsigned int create_default_symver: 1;
- /* TRUE if a default symbol version should be created and used for
- imported symbols. */
- unsigned int default_imported_symver: 1;
-
- /* TRUE if symbols should be retained in memory, FALSE if they
- should be freed and reread. */
- unsigned int keep_memory: 1;
+ /* TRUE if unreferenced sections should be removed. */
+ unsigned int gc_sections: 1;
/* TRUE if every symbol should be reported back via the notice
callback. */
unsigned int notice_all: 1;
- /* TRUE if executable should not contain copy relocs.
- Setting this true may result in a non-sharable text segment. */
- unsigned int nocopyreloc: 1;
+ /* TRUE if we are loading LTO outputs. */
+ unsigned int loading_lto_outputs: 1;
- /* TRUE if the new ELF dynamic tags are enabled. */
- unsigned int new_dtags: 1;
+ /* TRUE if global symbols in discarded sections should be stripped. */
+ unsigned int strip_discarded: 1;
- /* TRUE if non-PLT relocs should be merged into one reloc section
- and sorted so that relocs against the same symbol come together. */
- unsigned int combreloc: 1;
+ /* TRUE if all data symbols should be dynamic. */
+ unsigned int dynamic_data: 1;
- /* TRUE if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
- should be created. */
- unsigned int eh_frame_hdr: 1;
+ /* Which symbols to strip. */
+ ENUM_BITFIELD (bfd_link_strip) strip : 2;
- /* TRUE if global symbols in discarded sections should be stripped. */
- unsigned int strip_discarded: 1;
+ /* Which local symbols to discard. */
+ ENUM_BITFIELD (bfd_link_discard) discard : 2;
- /* TRUE if generating a position independent executable. */
- unsigned int pie: 1;
+ /* Criteria for skipping symbols when determining
+ whether to include an object from an archive. */
+ ENUM_BITFIELD (bfd_link_common_skip_ar_symbols) common_skip_ar_symbols : 2;
- /* TRUE if generating an executable, position independent or not. */
- unsigned int executable : 1;
+ /* What to do with unresolved symbols in an object file.
+ When producing executables the default is GENERATE_ERROR.
+ When producing shared libraries the default is IGNORE. The
+ assumption with shared libraries is that the reference will be
+ resolved at load/execution time. */
+ ENUM_BITFIELD (report_method) unresolved_syms_in_objects : 2;
- /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W|PF_X
- flags. */
- unsigned int execstack: 1;
+ /* What to do with unresolved symbols in a shared library.
+ The same defaults apply. */
+ ENUM_BITFIELD (report_method) unresolved_syms_in_shared_libs : 2;
- /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W
- flags. */
- unsigned int noexecstack: 1;
+ /* TRUE if shared objects should be linked directly, not shared. */
+ unsigned int static_link: 1;
+
+ /* TRUE if symbols should be retained in memory, FALSE if they
+ should be freed and reread. */
+ unsigned int keep_memory: 1;
+
+ /* TRUE if BFD should generate relocation information in the final
+ executable. */
+ unsigned int emitrelocations: 1;
/* TRUE if PT_GNU_RELRO segment should be created. */
unsigned int relro: 1;
+ /* TRUE if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
+ should be created. */
+ unsigned int eh_frame_hdr: 1;
+
/* TRUE if we should warn when adding a DT_TEXTREL to a shared object. */
unsigned int warn_shared_textrel: 1;
- /* TRUE if unreferenced sections should be removed. */
- unsigned int gc_sections: 1;
-
- /* TRUE if user shoudl be informed of removed unreferenced sections. */
- unsigned int print_gc_sections: 1;
+ /* TRUE if we should error when adding a DT_TEXTREL. */
+ unsigned int error_textrel: 1;
/* TRUE if .hash section should be created. */
unsigned int emit_hash: 1;
caching ELF symbol buffer. */
unsigned int reduce_memory_overheads: 1;
- /* TRUE if all data symbols should be dynamic. */
- unsigned int dynamic_data: 1;
+ /* TRUE if the output file should be in a traditional format. This
+ is equivalent to the setting of the BFD_TRADITIONAL_FORMAT flag
+ on the output file, but may be checked when reading the input
+ files. */
+ unsigned int traditional_format: 1;
+
+ /* TRUE if non-PLT relocs should be merged into one reloc section
+ and sorted so that relocs against the same symbol come together. */
+ unsigned int combreloc: 1;
+
+ /* TRUE if a default symbol version should be created and used for
+ imported symbols. */
+ unsigned int default_imported_symver: 1;
+
+ /* TRUE if the new ELF dynamic tags are enabled. */
+ unsigned int new_dtags: 1;
+
+ /* FALSE if .eh_frame unwind info should be generated for PLT and other
+ linker created sections, TRUE if it should be omitted. */
+ unsigned int no_ld_generated_unwind_info: 1;
+
+ /* TRUE if BFD should generate a "task linked" object file,
+ similar to relocatable but also with globals converted to
+ statics. */
+ unsigned int task_link: 1;
+
+ /* TRUE if ok to have multiple definition. */
+ unsigned int allow_multiple_definition: 1;
+
+ /* TRUE if ok to have version with no definition. */
+ unsigned int allow_undefined_version: 1;
/* TRUE if some symbols have to be dynamic, controlled by
--dynamic-list command line options. */
unsigned int dynamic: 1;
- /* Non-NULL if .note.gnu.build-id section should be created. */
- char *emit_note_gnu_build_id;
-
- /* What to do with unresolved symbols in an object file.
- When producing executables the default is GENERATE_ERROR.
- When producing shared libraries the default is IGNORE. The
- assumption with shared libraries is that the reference will be
- resolved at load/execution time. */
- enum report_method unresolved_syms_in_objects;
+ /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W|PF_X
+ flags. */
+ unsigned int execstack: 1;
- /* What to do with unresolved symbols in a shared library.
- The same defaults apply. */
- enum report_method unresolved_syms_in_shared_libs;
+ /* TRUE if PT_GNU_STACK segment should be created with PF_R|PF_W
+ flags. */
+ unsigned int noexecstack: 1;
- /* Which symbols to strip. */
- enum bfd_link_strip strip;
+ /* TRUE if we want to produced optimized output files. This might
+ need much more time and therefore must be explicitly selected. */
+ unsigned int optimize: 1;
- /* Which local symbols to discard. */
- enum bfd_link_discard discard;
+ /* TRUE if user should be informed of removed unreferenced sections. */
+ unsigned int print_gc_sections: 1;
- /* Criteria for skipping symbols when detemining
- whether to include an object from an archive. */
- enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
+ /* TRUE if we should warn alternate ELF machine code. */
+ unsigned int warn_alternate_em: 1;
/* Char that may appear as the first char of a symbol, but should be
skipped (like symbol_leading_char) when looking up symbols in
bfd *input_bfds;
bfd **input_bfds_tail;
+ /* Non-NULL if .note.gnu.build-id section should be created. */
+ char *emit_note_gnu_build_id;
+
/* If a symbol should be created for each input BFD, this is section
where those symbols should be placed. It must be a section in
the output BFD. It may be NULL, in which case no such symbols
/* List of symbols should be dynamic. */
struct bfd_elf_dynamic_list *dynamic_list;
+
+ /* The version information. */
+ struct bfd_elf_version_tree *version_info;
};
/* This structures holds a set of callback functions. These are called
/* A function which is called when an object is added from an
archive. ABFD is the archive element being added. NAME is the
name of the symbol which caused the archive element to be pulled
- in. */
+ in. This function may set *SUBSBFD to point to an alternative
+ BFD from which symbols should in fact be added in place of the
+ original BFD's symbols. */
bfd_boolean (*add_archive_element)
- (struct bfd_link_info *, bfd *abfd, const char *name);
+ (struct bfd_link_info *, bfd *abfd, const char *name, bfd **subsbfd);
/* A function which is called when a symbol is found with multiple
- definitions. NAME is the symbol which is defined multiple times.
- OBFD is the old BFD, OSEC is the old section, OVAL is the old
- value, NBFD is the new BFD, NSEC is the new section, and NVAL is
- the new value. OBFD may be NULL. OSEC and NSEC may be
- bfd_com_section or bfd_ind_section. */
+ definitions. H is the symbol which is defined multiple times.
+ NBFD is the new BFD, NSEC is the new section, and NVAL is the new
+ value. NSEC may be bfd_com_section or bfd_ind_section. */
bfd_boolean (*multiple_definition)
- (struct bfd_link_info *, const char *name,
- bfd *obfd, asection *osec, bfd_vma oval,
+ (struct bfd_link_info *, struct bfd_link_hash_entry *h,
bfd *nbfd, asection *nsec, bfd_vma nval);
/* A function which is called when a common symbol is defined
- multiple times. NAME is the symbol appearing multiple times.
- OBFD is the BFD of the existing symbol; it may be NULL if this is
- not known. OTYPE is the type of the existing symbol, which may
- be bfd_link_hash_defined, bfd_link_hash_defweak,
- bfd_link_hash_common, or bfd_link_hash_indirect. If OTYPE is
- bfd_link_hash_common, OSIZE is the size of the existing symbol.
+ multiple times. H is the symbol appearing multiple times.
NBFD is the BFD of the new symbol. NTYPE is the type of the new
symbol, one of bfd_link_hash_defined, bfd_link_hash_common, or
bfd_link_hash_indirect. If NTYPE is bfd_link_hash_common, NSIZE
is the size of the new symbol. */
bfd_boolean (*multiple_common)
- (struct bfd_link_info *, const char *name,
- bfd *obfd, enum bfd_link_hash_type otype, bfd_vma osize,
+ (struct bfd_link_info *, struct bfd_link_hash_entry *h,
bfd *nbfd, enum bfd_link_hash_type ntype, bfd_vma nsize);
/* A function which is called to add a symbol to a set. ENTRY is
the link hash table entry for the set itself (e.g.,
/* A function which is called when a relocation is attempted against
an undefined symbol. NAME is the symbol which is undefined.
ABFD, SECTION and ADDRESS identify the location from which the
- reference is made. FATAL indicates whether an undefined symbol is
+ reference is made. IS_FATAL indicates whether an undefined symbol is
a fatal error or not. In some cases SECTION may be NULL. */
bfd_boolean (*undefined_symbol)
(struct bfd_link_info *, const char *name, bfd *abfd,
- asection *section, bfd_vma address, bfd_boolean fatal);
+ asection *section, bfd_vma address, bfd_boolean is_fatal);
/* A function which is called when a reloc overflow occurs. ENTRY is
the link hash table entry for the symbol the reloc is against.
NAME is the name of the local symbol or section the reloc is
(struct bfd_link_info *, const char *name,
bfd *abfd, asection *section, bfd_vma address);
/* A function which is called when a symbol in notice_hash is
- defined or referenced. NAME is the symbol. ABFD, SECTION and
- ADDRESS are the value of the symbol. If SECTION is
- bfd_und_section, this is a reference. */
+ defined or referenced. H is the symbol. ABFD, SECTION and
+ ADDRESS are the (new) value of the symbol. If SECTION is
+ bfd_und_section, this is a reference. FLAGS are the symbol
+ BSF_* flags. STRING is the name of the symbol to indirect to if
+ the sym is indirect, or the warning string if a warning sym. */
bfd_boolean (*notice)
- (struct bfd_link_info *, const char *name,
- bfd *abfd, asection *section, bfd_vma address);
+ (struct bfd_link_info *, struct bfd_link_hash_entry *h,
+ bfd *abfd, asection *section, bfd_vma address, flagword flags,
+ const char *string);
/* Error or warning link info message. */
void (*einfo)
(const char *fmt, ...);
struct bfd_elf_version_expr *next;
/* Glob pattern. */
const char *pattern;
- /* NULL for a glob pattern, otherwise a straight symbol. */
- const char *symbol;
+ /* Set if pattern is not a glob. */
+ unsigned int literal : 1;
/* Defined by ".symver". */
unsigned int symver : 1;
/* Defined by version script. */
projects / binutils-gdb.git / blobdiff