/* Object file "section" support for the BFD library.
- Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright (C) 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
SECTION
.#define SEC_HAS_CONTENTS 0x200
.
. {* An instruction to the linker to not output the section
-. even if it has information which would normally be written. *}
+. even if it has information which would normally be written. *}
.#define SEC_NEVER_LOAD 0x400
.
-. {* The section is a shared library section. The linker must leave
-. these completely alone, as the vma and size are used when
-. the executable is loaded. *}
-.#define SEC_SHARED_LIBRARY 0x800
-.
-. {* The section is a common section (symbols may be defined
+. {* The section is a COFF shared library section. This flag is
+. only for the linker. If this type of section appears in
+. the input file, the linker must copy it to the output file
+. without changing the vma or size. FIXME: Although this
+. was originally intended to be general, it really is COFF
+. specific (and the flag was renamed to indicate this). It
+. might be cleaner to have some more general mechanism to
+. allow the back end to control what the linker does with
+. sections. *}
+.#define SEC_COFF_SHARED_LIBRARY 0x800
+.
+. {* The section contains common symbols (symbols may be defined
. multiple times, the value of a symbol is the amount of
. space it requires, and the largest symbol value is the one
. used). Most targets have exactly one of these (which we
-. translate to bfd_com_section), but ECOFF has two. *}
+. translate to bfd_com_section_ptr), but ECOFF has two. *}
.#define SEC_IS_COMMON 0x8000
.
. {* The section contains only debugging information. For
. memory if appropriate. *}
.#define SEC_IN_MEMORY 0x20000
.
+. {* The contents of this section are to be excluded by the
+. linker for executable and shared objects unless those
+. objects are to be further relocated. *}
+.#define SEC_EXCLUDE 0x40000
+.
+. {* The contents of this section are to be sorted by the
+. based on the address specified in the associated symbol
+. table. *}
+.#define SEC_SORT_ENTRIES 0x80000
+.
+. {* When linking, duplicate sections of the same name should be
+. discarded, rather than being combined into a single section as
+. is usually done. This is similar to how common symbols are
+. handled. See SEC_LINK_DUPLICATES below. *}
+.#define SEC_LINK_ONCE 0x100000
+.
+. {* If SEC_LINK_ONCE is set, this bitfield describes how the linker
+. should handle duplicate sections. *}
+.#define SEC_LINK_DUPLICATES 0x600000
+.
+. {* This value for SEC_LINK_DUPLICATES means that duplicate
+. sections with the same name should simply be discarded. *}
+.#define SEC_LINK_DUPLICATES_DISCARD 0x0
+.
+. {* This value for SEC_LINK_DUPLICATES means that the linker
+. should warn if there are any duplicate sections, although
+. it should still only link one copy. *}
+.#define SEC_LINK_DUPLICATES_ONE_ONLY 0x200000
+.
+. {* This value for SEC_LINK_DUPLICATES means that the linker
+. should warn if any duplicate sections are a different size. *}
+.#define SEC_LINK_DUPLICATES_SAME_SIZE 0x400000
+.
+. {* This value for SEC_LINK_DUPLICATES means that the linker
+. should warn if any duplicate sections contain different
+. contents. *}
+.#define SEC_LINK_DUPLICATES_SAME_CONTENTS 0x600000
+.
+. {* This section was created by the linker as part of dynamic
+. relocation or other arcane processing. It is skipped when
+. going through the first-pass output, trusting that someone
+. else up the line will take care of it later. *}
+.#define SEC_LINKER_CREATED 0x800000
+.
. {* End of section flags. *}
.
+. {* Some internal packed boolean fields. *}
+.
+. {* See the vma field. *}
+. unsigned int user_set_vma : 1;
+.
+. {* Whether relocations have been processed. *}
+. unsigned int reloc_done : 1;
+.
+. {* A mark flag used by some of the linker backends. *}
+. unsigned int linker_mark : 1;
+.
+. {* End of internal packed boolean fields. *}
+.
. {* The virtual memory address of the section - where it will be
. at run time. The symbols are relocated against this. The
. user_set_vma flag is maintained by bfd; if it's not set, the
. target and various flags). *}
.
. bfd_vma vma;
-. boolean user_set_vma;
.
. {* The load address of the section - where it would be in a
. rom image; really only used for writing section header
.
. bfd *owner;
.
-. boolean reloc_done;
. {* A symbol which points at this section only *}
. struct symbol_cache_entry *symbol;
. struct symbol_cache_entry **symbol_ptr_ptr;
. struct bfd_link_order *link_order_tail;
.} asection ;
.
-.
. {* These sections are global, and are managed by BFD. The application
. and target back end are not permitted to change the values in
-. these sections. *}
+. these sections. New code should use the section_ptr macros rather
+. than referring directly to the const sections. The const sections
+. may eventually vanish. *}
.#define BFD_ABS_SECTION_NAME "*ABS*"
.#define BFD_UND_SECTION_NAME "*UND*"
.#define BFD_COM_SECTION_NAME "*COM*"
.#define BFD_IND_SECTION_NAME "*IND*"
.
. {* the absolute section *}
-.extern asection bfd_abs_section;
+.extern const asection bfd_abs_section;
+.#define bfd_abs_section_ptr ((asection *) &bfd_abs_section)
+.#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr)
. {* Pointer to the undefined section *}
-.extern asection bfd_und_section;
+.extern const asection bfd_und_section;
+.#define bfd_und_section_ptr ((asection *) &bfd_und_section)
+.#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr)
. {* Pointer to the common section *}
-.extern asection bfd_com_section;
+.extern const asection bfd_com_section;
+.#define bfd_com_section_ptr ((asection *) &bfd_com_section)
. {* Pointer to the indirect section *}
-.extern asection bfd_ind_section;
-.
-.extern struct symbol_cache_entry *bfd_abs_symbol;
-.extern struct symbol_cache_entry *bfd_com_symbol;
-.extern struct symbol_cache_entry *bfd_und_symbol;
-.extern struct symbol_cache_entry *bfd_ind_symbol;
+.extern const asection bfd_ind_section;
+.#define bfd_ind_section_ptr ((asection *) &bfd_ind_section)
+.#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
+.
+.extern const struct symbol_cache_entry * const bfd_abs_symbol;
+.extern const struct symbol_cache_entry * const bfd_com_symbol;
+.extern const struct symbol_cache_entry * const bfd_und_symbol;
+.extern const struct symbol_cache_entry * const bfd_ind_symbol;
.#define bfd_get_section_size_before_reloc(section) \
. (section->reloc_done ? (abort(),1): (section)->_raw_size)
.#define bfd_get_section_size_after_reloc(section) \
/* These symbols are global, not specific to any BFD. Therefore, anything
that tries to change them is broken, and should be repaired. */
-static CONST asymbol global_syms[] =
+static const asymbol global_syms[] =
{
/* the_bfd, name, value, attr, section [, udata] */
- {0, BFD_COM_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_com_section},
- {0, BFD_UND_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_und_section},
- {0, BFD_ABS_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_abs_section},
- {0, BFD_IND_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_ind_section},
+ {0, BFD_COM_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_com_section},
+ {0, BFD_UND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_und_section},
+ {0, BFD_ABS_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_abs_section},
+ {0, BFD_IND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_ind_section},
};
#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
- asymbol *SYM = (asymbol *) &global_syms[IDX]; \
- asection SEC = { NAME, 0, 0, FLAGS, 0, 0, (boolean) 0, 0, 0, 0, &SEC,\
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (boolean) 0, \
- (asymbol *) &global_syms[IDX], &SYM, }
-
-STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol, BFD_COM_SECTION_NAME, 0);
+ const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
+ const asection SEC = \
+ { NAME, 0, 0, FLAGS, 0, 0, 0, 0, 0, 0, 0, 0, (asection *) &SEC, \
+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, \
+ (asymbol *) &global_syms[IDX], (asymbol **) &SYM, 0, 0 }
+
+STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol,
+ BFD_COM_SECTION_NAME, 0);
STD_SECTION (bfd_und_section, 0, bfd_und_symbol, BFD_UND_SECTION_NAME, 1);
STD_SECTION (bfd_abs_section, 0, bfd_abs_symbol, BFD_ABS_SECTION_NAME, 2);
STD_SECTION (bfd_ind_section, 0, bfd_ind_symbol, BFD_IND_SECTION_NAME, 3);
newsect = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (newsect == NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return NULL;
- }
+ return NULL;
newsect->name = name;
newsect->index = abfd->section_count++;
useful for things like relocs which are relative to the base of a
section. */
newsect->symbol = bfd_make_empty_symbol (abfd);
- if (!newsect)
+ if (newsect->symbol == NULL)
return NULL;
newsect->symbol->name = name;
newsect->symbol->value = 0;
<<bfd_error>>.
*/
-sec_ptr
+asection *
bfd_make_section (abfd, name)
bfd *abfd;
CONST char *name;
if (strcmp (name, BFD_ABS_SECTION_NAME) == 0)
{
- return &bfd_abs_section;
+ return bfd_abs_section_ptr;
}
if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
{
- return &bfd_com_section;
+ return bfd_com_section_ptr;
}
if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
{
- return &bfd_und_section;
+ return bfd_und_section_ptr;
}
if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
{
- return &bfd_ind_section;
+ return bfd_ind_section_ptr;
}
while (sect)
PTR user_storage;
{
asection *sect;
- int i = 0;
+ unsigned int i = 0;
for (sect = abfd->sections; sect != NULL; i++, sect = sect->next)
(*operation) (abfd, sect, user_storage);
{
bfd_size_type sz;
- if (!bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS)
+ if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS))
{
bfd_set_error (bfd_error_no_contents);
return (false);
return false;
}
sz = bfd_get_section_size_now (abfd, section);
- if (offset > sz
+ if ((bfd_size_type) offset > sz
|| count > sz
|| offset + count > sz)
goto bad_val;
/* Even if reloc_done is true, this function reads unrelocated
contents, so we want the raw size. */
sz = section->_raw_size;
- if (offset > sz || count > sz || offset + count > sz)
+ if ((bfd_size_type) offset > sz || count > sz || offset + count > sz)
goto bad_val;
if (count == 0)
if ((section->flags & SEC_IN_MEMORY) != 0)
{
- memcpy (location, section->contents + offset, count);
+ memcpy (location, section->contents + offset, (size_t) count);
return true;
}
return BFD_SEND (abfd, _bfd_get_section_contents,
(abfd, section, location, offset, count));
}
+
+/*
+FUNCTION
+ bfd_copy_private_section_data
+
+SYNOPSIS
+ boolean bfd_copy_private_section_data(bfd *ibfd, asection *isec, bfd *obfd, asection *osec);
+
+DESCRIPTION
+ Copy private section information from @var{isec} in the BFD
+ @var{ibfd} to the section @var{osec} in the BFD @var{obfd}.
+ Return <<true>> on success, <<false>> on error. Possible error
+ returns are:
+
+ o <<bfd_error_no_memory>> -
+ Not enough memory exists to create private data for @var{osec}.
+
+.#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \
+. BFD_SEND (obfd, _bfd_copy_private_section_data, \
+. (ibfd, isection, obfd, osection))
+*/
projects / binutils-gdb.git / blobdiff