/* bfdlink.h -- header file for BFD link routines
- Copyright 1993, 94, 95, 96, 1997 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002
+ 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 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
-(at your option) any later version.
+ 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
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef BFDLINK_H
#define BFDLINK_H
if strip_all is used. */
enum bfd_link_discard
{
+ discard_sec_merge, /* Discard local temporary symbols in SEC_MERGE
+ sections. */
discard_none, /* Don't discard any locals. */
discard_l, /* Discard local temporary symbols. */
discard_all /* Discard all locals. */
};
+
+/* Describes the type of hash table entry structure being used.
+ Different hash table structure have different fields and so
+ support different linking features. */
+enum bfd_link_hash_table_type
+ {
+ bfd_link_generic_hash_table,
+ bfd_link_elf_hash_table
+ };
\f
/* These are the possible types of an entry in the BFD link hash
table. */
bfd_link_hash_warning /* Like indirect, but warn if referenced. */
};
+enum bfd_link_common_skip_ar_aymbols
+{
+ bfd_link_common_skip_none,
+ bfd_link_common_skip_text,
+ bfd_link_common_skip_data,
+ bfd_link_common_skip_all
+};
+
/* The linking routines use a hash table which uses this structure for
its elements. */
struct bfd_link_hash_entry *undefs;
/* Entries are added to the tail of the undefs list. */
struct bfd_link_hash_entry *undefs_tail;
+ /* The type of the ink hash table. */
+ enum bfd_link_hash_table_type type;
};
/* Look up an entry in a link hash table. If FOLLOW is true, this
/* Add an entry to the undefs list. */
extern void bfd_link_add_undef
PARAMS ((struct bfd_link_hash_table *, struct bfd_link_hash_entry *));
+
+struct bfd_sym_chain
+{
+ struct bfd_sym_chain *next;
+ const char *name;
+};
\f
/* This structure holds all the information needed to communicate
between BFD and the linker when doing a link. */
{
/* Function callbacks. */
const struct bfd_link_callbacks *callbacks;
+
/* true if BFD should generate a relocateable object file. */
boolean relocateable;
+
+ /* true if BFD should generate relocation information in the final
+ executable. */
+ boolean emitrelocations;
+
/* true if BFD should generate a "task linked" object file,
- similar to relocatable but also with globals converted to statics. */
+ similar to relocatable but also with globals converted to
+ statics. */
boolean task_link;
+
/* true if BFD should generate a shared object. */
boolean shared;
+
/* true if BFD should pre-bind symbols in a shared object. */
boolean symbolic;
+
+ /* true if BFD should export all symbols in the dynamic symbol table
+ of an executable, rather than only those used. */
+ boolean export_dynamic;
+
/* true if shared objects should be linked directly, not shared. */
boolean static_link;
+
/* 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. */
boolean traditional_format;
+
/* true if we want to produced optimized output files. This might
need much more time and therefore must be explicitly selected. */
boolean optimize;
+
+ /* true if BFD should generate errors for undefined symbols
+ even if generating a shared object. */
+ boolean no_undefined;
+
+ /* true if BFD should allow undefined symbols in shared objects even
+ when no_undefined is set to disallow undefined symbols. The net
+ result will be that undefined symbols in regular objects will
+ still trigger an error, but undefined symbols in shared objects
+ will be ignored. The implementation of no_undefined makes the
+ assumption that the runtime linker will choke on undefined
+ symbols. However there is at least one system (BeOS) where
+ undefined symbols in shared libraries is normal since the kernel
+ patches them at load time to select which function is most
+ appropriate for the current architecture. I.E. dynamically
+ select an appropriate memset function. Apparently it is also
+ normal for HPPA shared libraries to have undefined symbols. */
+ boolean allow_shlib_undefined;
+
+ /* true if ok to have multiple definition. */
+ boolean allow_multiple_definition;
+
+ /* true if ok to have version with no definition. */
+ boolean allow_undefined_version;
+
/* Which symbols to strip. */
enum bfd_link_strip strip;
+
/* Which local symbols to discard. */
enum bfd_link_discard discard;
+
/* true if symbols should be retained in memory, false if they
should be freed and reread. */
boolean keep_memory;
+
/* The list of input BFD's involved in the link. These are chained
together via the link_next field. */
bfd *input_bfds;
+
/* 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
will be created. This is to support CREATE_OBJECT_SYMBOLS in the
linker command language. */
asection *create_object_symbols_section;
+
+ /* List of global symbol names that are starting points for marking
+ sections against garbage collection. */
+ struct bfd_sym_chain *gc_sym_list;
+
/* Hash table handled by BFD. */
struct bfd_link_hash_table *hash;
+
/* Hash table of symbols to keep. This is NULL unless strip is
strip_some. */
struct bfd_hash_table *keep_hash;
+
/* true if every symbol should be reported back via the notice
callback. */
boolean notice_all;
+
/* Hash table of symbols to report back via the notice callback. If
this is NULL, and notice_all is false, then no symbols are
reported back. */
struct bfd_hash_table *notice_hash;
+
/* Hash table of symbols which are being wrapped (the --wrap linker
option). If this is NULL, no symbols are being wrapped. */
struct bfd_hash_table *wrap_hash;
+
/* If a base output file is wanted, then this points to it */
PTR base_file;
+
+ /* If non-zero, specifies that branches which are problematic for the
+ MPC860 C0 (or earlier) should be checked for and modified. It gives the
+ number of bytes that should be checked at the end of each text page. */
+ int mpc860c0;
+
+ /* The function to call when the executable or shared object is
+ loaded. */
+ const char *init_function;
+
+ /* The function to call when the executable or shared object is
+ unloaded. */
+ const char *fini_function;
+
+ /* true if the new ELF dynamic tags are enabled. */
+ boolean new_dtags;
+
+ /* May be used to set DT_FLAGS for ELF. */
+ bfd_vma flags;
+
+ /* May be used to set DT_FLAGS_1 for ELF. */
+ bfd_vma flags_1;
+
+ /* 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. */
+ int pei386_auto_import;
+
+ /* Non-zero if runtime relocs for DATA items with non-zero addends
+ in pei386 DLLs should be generated. Set to 1 if this feature
+ is explicitly requested by the user, -1 if enabled by default. */
+ int pei386_runtime_pseudo_reloc;
+
+ /* True if non-PLT relocs should be merged into one reloc section
+ and sorted so that relocs against the same symbol come together. */
+ boolean combreloc;
+
+ /* True if executable should not contain copy relocs.
+ Setting this true may result in a non-sharable text segment. */
+ boolean nocopyreloc;
+
+ /* True if .eh_frame_hdr section and PT_GNU_EH_FRAME ELF segment
+ should be created. */
+ boolean eh_frame_hdr;
+
+ /* How many spare .dynamic DT_NULL entries should be added? */
+ unsigned int spare_dynamic_tags;
+
+ /* 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;
};
/* This structures holds a set of callback functions. These are
/* 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. In some cases SECTION may be NULL. */
+ reference is made. FATAL indicates whether an undefined symbol is
+ a fatal error or not. In some cases SECTION may be NULL. */
boolean (*undefined_symbol) PARAMS ((struct bfd_link_info *,
const char *name, bfd *abfd,
- asection *section, bfd_vma address));
+ asection *section,
+ bfd_vma address,
+ boolean fatal));
/* A function which is called when a reloc overflow occurs. NAME is
the name of the symbol or section the reloc is against,
RELOC_NAME is the name of the relocation, and ADDEND is any
{
bfd_undefined_link_order, /* Undefined. */
bfd_indirect_link_order, /* Built from a section. */
- bfd_fill_link_order, /* Fill with a 16 bit constant. */
bfd_data_link_order, /* Set to explicit data. */
bfd_section_reloc_link_order, /* Relocate against a section. */
bfd_symbol_reloc_link_order /* Relocate against a symbol. */
} indirect;
struct
{
- /* Value to fill with. */
- unsigned int value;
- } fill;
- struct
- {
- /* Data to put into file. The size field gives the number
- of bytes which this field points to. */
+ /* Size of contents, or zero when contents size == size
+ within output section.
+ A non-zero value allows filling of the output section
+ with an arbitrary repeated pattern. */
+ unsigned int size;
+ /* Data to put into file. */
bfd_byte *contents;
} data;
struct
/* Next regular expression for this version. */
struct bfd_elf_version_expr *next;
/* Regular expression. */
- const char *match;
+ const char *pattern;
+ /* Matching function. */
+ int (*match) PARAMS((struct bfd_elf_version_expr *, const char *));
+ /* Defined by ".symver". */
+ unsigned int symver: 1;
+ /* Defined by version script. */
+ unsigned int script : 1;
};
/* Version dependencies. */
projects / deliverable / binutils-gdb.git / blobdiff