/* bfdlink.h -- header file for BFD link routines
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
- 2003, 2004, 2005 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.
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 2 of the License, or
+ 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,
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. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
#ifndef BFDLINK_H
#define BFDLINK_H
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;
{
/* The hash table itself. */
struct bfd_hash_table table;
- /* The back end which created this hash table. This indicates the
- type of the entries in the hash table, which is sometimes
- important information when linking object files of different
- types together. */
- const bfd_target *creator;
/* A linked list of undefined and common symbols, linked through the
next field in the bfd_link_hash_entry structure. */
struct bfd_link_hash_entry *undefs;
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
};
+struct bfd_elf_dynamic_list;
+
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
/* TRUE if we should warn when adding a DT_TEXTREL to a shared object. */
unsigned int warn_shared_textrel: 1;
+ /* TRUE if we should warn alternate ELF machine code. */
+ unsigned int warn_alternate_em: 1;
+
/* TRUE if unreferenced sections should be removed. */
unsigned int gc_sections: 1;
/* TRUE if .gnu.hash section should be created. */
unsigned int emit_gnu_hash: 1;
+ /* If TRUE reduce memory overheads, at the expense of speed. This will
+ cause map file generation to use an O(N^2) algorithm and disable
+ 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 some symbols have to be dynamic, controlled by
+ --dynamic-list command line options. */
+ unsigned int dynamic: 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;
+
+ /* 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
/* Which local symbols to discard. */
enum bfd_link_discard discard;
- /* Criteria for skipping symbols when detemining
+ /* Criteria for skipping symbols when determining
whether to include an object from an archive. */
- enum bfd_link_common_skip_ar_aymbols common_skip_ar_aymbols;
+ enum bfd_link_common_skip_ar_symbols common_skip_ar_symbols;
/* Char that may appear as the first char of a symbol, but should be
skipped (like symbol_leading_char) when looking up symbols in
wrap_hash. Used by PowerPC Linux for 'dot' symbols. */
char wrap_char;
+ /* Separator between archive and filename in linker script filespecs. */
+ char path_separator;
+
/* Function callbacks. */
const struct bfd_link_callbacks *callbacks;
option). If this is NULL, no symbols are being wrapped. */
struct bfd_hash_table *wrap_hash;
+ /* The output BFD. */
+ bfd *output_bfd;
+
/* The list of input BFD's involved in the link. These are chained
together via the link_next field. */
bfd *input_bfds;
+ bfd **input_bfds_tail;
/* 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
current pass, starting from 0. */
int relax_pass;
+ /* Number of relaxation trips. This number is incremented every
+ time the relaxation pass is restarted due to a previous
+ relaxation returning true in *AGAIN. */
+ int relax_trip;
+
/* Non-zero if auto-import thunks for DATA items in pei386 DLLs
should be generated/linked against. Set to 1 if this feature
is explicitly requested by the user, -1 if enabled by default. */
/* Start and end of RELRO region. */
bfd_vma relro_start, relro_end;
+
+ /* List of symbols should be dynamic. */
+ struct bfd_elf_dynamic_list *dynamic_list;
};
-/* This structures holds a set of callback functions. These are
- called by the BFD linker routines. Except for einfo, the first
+/* This structures holds a set of callback functions. These are called
+ by the BFD linker routines. Except for the info functions, the first
argument to each callback function is the bfd_link_info structure
being used and each function returns a boolean value. If the
function returns FALSE, then the BFD function which called it should
/* 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);
- /* General link info message. */
+ (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, ...);
+ /* General link info message. */
+ void (*info)
+ (const char *fmt, ...);
+ /* Message to be printed in linker map file. */
+ void (*minfo)
+ (const char *fmt, ...);
+ /* This callback provides a chance for users of the BFD library to
+ override its decision about whether to place two adjacent sections
+ into the same segment. */
+ bfd_boolean (*override_segment_assignment)
+ (struct bfd_link_info *, bfd * abfd,
+ asection * current_section, asection * previous_section,
+ bfd_boolean new_segment);
};
\f
/* The linker builds link_order structures which tell the code how to
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. */
struct bfd_elf_version_expr *prev, const char *sym);
};
+struct bfd_elf_dynamic_list
+{
+ struct bfd_elf_version_expr_head head;
+ struct bfd_elf_version_expr *(*match)
+ (struct bfd_elf_version_expr_head *head,
+ struct bfd_elf_version_expr *prev, const char *sym);
+};
+
#endif
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