/* 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, 96, 97, 98, 1999
+ 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
INODE
Section Input, Section Output, Sections, Sections
SUBSECTION
- Section Input
+ Section input
When a BFD is opened for reading, the section structures are
created and attached to the BFD.
Each section has a name which describes the section in the
outside world---for example, <<a.out>> would contain at least
- three sections, called <<.text>>, <<.data>> and <<.bss>>.
+ three sections, called <<.text>>, <<.data>> and <<.bss>>.
Names need not be unique; for example a COFF file may have several
sections named <<.data>>.
Section Output, typedef asection, Section Input, Sections
SUBSECTION
- Section Output
+ Section output
To write a new object style BFD, the various sections to be
written have to be created. They are attached to the BFD in
the same way as input sections; data is written to the
- sections using <<bfd_set_section_contents>>.
+ sections using <<bfd_set_section_contents>>.
Any program that creates or combines sections (e.g., the assembler
and linker) must use the <<asection>> fields <<output_section>> and
SUBSECTION
- Seclets
+ Link orders
- The data within a section is stored in a <<seclet>>. These
- are much like the fixups in <<gas>>. The seclet abstraction
- allows a section to grow and shrink within itself.
+ The data within a section is stored in a @dfn{link_order}.
+ These are much like the fixups in <<gas>>. The link_order
+ abstraction allows a section to grow and shrink within itself.
- A seclet knows how big it is, and which is the next seclet and
- where the raw data for it is; it also points to a list of
- relocations which apply to it.
+ A link_order knows how big it is, and which is the next
+ link_order and where the raw data for it is; it also points to
+ a list of relocations which apply to it.
- The seclet is used by the linker to perform relaxing on final
- code. The compiler creates code which is as big as
+ The link_order is used by the linker to perform relaxing on
+ final code. The compiler creates code which is as big as
necessary to make it work without relaxing, and the user can
select whether to relax. Sometimes relaxing takes a lot of
time. The linker runs around the relocations to see if any
are attached to data which can be shrunk, if so it does it on
- a seclet by seclet basis.
+ a link_order by link_order basis.
*/
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
-
+#include "bfdlink.h"
/*
DOCDD
CODE_FRAGMENT
.
-.typedef struct sec
+.typedef struct sec
.{
. {* The name of the section; the name isn't a copy, the pointer is
. the same as that passed to bfd_make_section. *}
.
. {* Which section is it; 0..nth. *}
.
-. int index;
+. int index;
.
. {* The next section in the list belonging to the BFD, or NULL. *}
.
.
. {* The field flags contains attributes of the section. Some
. flags are read in from the object file, and some are
-. synthesized from other information. *}
+. synthesized from other information. *}
.
. flagword flags;
.
. This is clear for a section containing debug information
. only. *}
.#define SEC_ALLOC 0x001
-.
+.
. {* Tells the OS to load the section from the file when loading.
. This is clear for a .bss section. *}
.#define SEC_LOAD 0x002
. standard data. *}
.#define SEC_CONSTRUCTOR 0x100
.
-. {* The section is a constuctor, and should be placed at the
+. {* The section is a constructor, and should be placed at the
. end of the text, data, or bss section(?). *}
.#define SEC_CONSTRUCTOR_TEXT 0x1100
.#define SEC_CONSTRUCTOR_DATA 0x2100
.#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
. discarded. *}
.#define SEC_DEBUGGING 0x10000
.
+. {* The contents of this section are held in memory pointed to
+. by the contents field. This is checked by
+. bfd_get_section_contents, and the data is retrieved from
+. 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
+.
+. {* This section should not be subject to garbage collection. *}
+.#define SEC_KEEP 0x1000000
+.
+. {* This section contains "short" data, and should be placed
+. "near" the GP. *}
+.#define SEC_SHORT 0x2000000
+.
. {* 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;
+.
+. {* A mark flag used by some linker backends for garbage collection. *}
+. unsigned int gc_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
. contains a value even if the section has no contents (e.g., the
. size of <<.bss>>). This will be filled in after relocation *}
.
-. bfd_size_type _cooked_size;
+. bfd_size_type _cooked_size;
.
. {* The original size on disk of the section, in bytes. Normally this
. value is the same as the size, but if some relaxing has
. been done, then this value will be bigger. *}
.
-. bfd_size_type _raw_size;
+. bfd_size_type _raw_size;
.
. {* If this section is going to be output, then this value is the
. offset into the output section of the first byte in the input
.
. {* File position of section data *}
.
-. file_ptr filepos;
-.
+. file_ptr filepos;
+.
. {* File position of relocation info *}
.
. file_ptr rel_filepos;
.
. PTR userdata;
.
-. struct lang_output_section *otheruserdata;
+. {* If the SEC_IN_MEMORY flag is set, this points to the actual
+. contents. *}
+. unsigned char *contents;
.
. {* Attached line number information *}
.
. alent *lineno;
-.
+.
. {* Number of line number records *}
.
. unsigned int lineno_count;
.
. bfd *owner;
.
-. boolean reloc_done;
. {* A symbol which points at this section only *}
-. struct symbol_cache_entry *symbol;
+. struct symbol_cache_entry *symbol;
. struct symbol_cache_entry **symbol_ptr_ptr;
.
-. struct bfd_seclet *seclets_head;
-. struct bfd_seclet *seclets_tail;
+. struct bfd_link_order *link_order_head;
+. 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) \
. ((section->reloc_done) ? (section)->_cooked_size: (abort(),1))
*/
+/* We use a macro to initialize the static asymbol structures because
+ traditional C does not permit us to initialize a union member while
+ gcc warns if we don't initialize it. */
+ /* the_bfd, name, value, attr, section [, udata] */
+#ifdef __STDC__
+#define GLOBAL_SYM_INIT(NAME, SECTION) \
+ { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION, { 0 }}
+#else
+#define GLOBAL_SYM_INIT(NAME, SECTION) \
+ { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION }
+#endif
+
/* 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[] = {
- /* 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 },
+
+static const asymbol global_syms[] =
+{
+ GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, &bfd_com_section),
+ GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, &bfd_und_section),
+ GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, &bfd_abs_section),
+ GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, &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, 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);
INODE
section prototypes, , typedef asection, Sections
SUBSECTION
- section prototypes
+ Section prototypes
-These are the functions exported by the section handling part of
-<<libbfd>>.
+These are the functions exported by the section handling part of BFD.
*/
/*
-FUNCTION
+FUNCTION
bfd_get_section_by_name
SYNOPSIS
asection *bfd_get_section_by_name(bfd *abfd, CONST char *name);
DESCRIPTION
- Run through the provided @var{abfd} and return the one of the
- <<asection>>s whose name matches @var{name}, otherwise NULL.
+ Run through @var{abfd} and return the one of the
+ <<asection>>s whose name matches @var{name}, otherwise <<NULL>>.
@xref{Sections}, for more information.
This should only be used in special cases; the normal way to process
- all sections of a given name is to use bfd_map_over_sections and
- strcmp on the name (or better yet, base it on the section flags
+ all sections of a given name is to use <<bfd_map_over_sections>> and
+ <<strcmp>> on the name (or better yet, base it on the section flags
or something else) for each section.
*/
asection *
-DEFUN(bfd_get_section_by_name,(abfd, name),
- bfd *abfd AND
- CONST char *name)
+bfd_get_section_by_name (abfd, name)
+ bfd *abfd;
+ CONST char *name;
{
asection *sect;
for (sect = abfd->sections; sect != NULL; sect = sect->next)
- if (!strcmp (sect->name, name)) return sect;
+ if (!strcmp (sect->name, name))
+ return sect;
return NULL;
}
Create a new empty section called @var{name}
and attach it to the end of the chain of sections for the
BFD @var{abfd}. An attempt to create a section with a name which
- is already in use, returns its pointer without changing the
+ is already in use returns its pointer without changing the
section chain.
It has the funny name since this is the way it used to be
before it was rewritten....
Possible errors are:
- o invalid_operation -
+ o <<bfd_error_invalid_operation>> -
If output has already started for this BFD.
- o no_memory -
- If obstack alloc fails.
+ o <<bfd_error_no_memory>> -
+ If memory allocation fails.
*/
asection *
-DEFUN(bfd_make_section_old_way,(abfd, name),
- bfd *abfd AND
- CONST char * name)
+bfd_make_section_old_way (abfd, name)
+ bfd *abfd;
+ CONST char *name;
{
- asection *sec = bfd_get_section_by_name(abfd, name);
- if (sec == (asection *)NULL)
+ asection *sec = bfd_get_section_by_name (abfd, name);
+ if (sec == (asection *) NULL)
{
- sec = bfd_make_section(abfd, name);
+ sec = bfd_make_section (abfd, name);
}
return sec;
}
DESCRIPTION
Create a new empty section called @var{name} and attach it to the end of
the chain of sections for @var{abfd}. Create a new section even if there
- is already a section with that name.
+ is already a section with that name.
- Returns NULL and sets bfd_error on error; possible errors are:
- o invalid_operation - If output has already started for @var{abfd}.
- o no_memory - If obstack alloc fails.
+ Return <<NULL>> and set <<bfd_error>> on error; possible errors are:
+ o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}.
+ o <<bfd_error_no_memory>> - If memory allocation fails.
*/
sec_ptr
{
asection *newsect;
asection **prev = &abfd->sections;
- asection * sect = abfd->sections;
+ asection *sect = abfd->sections;
if (abfd->output_has_begun)
{
- bfd_error = invalid_operation;
+ bfd_set_error (bfd_error_invalid_operation);
return NULL;
}
- while (sect) {
- prev = §->next;
- sect = sect->next;
- }
+ while (sect)
+ {
+ prev = §->next;
+ sect = sect->next;
+ }
- newsect = (asection *) bfd_zalloc(abfd, sizeof (asection));
- if (newsect == NULL) {
- bfd_error = no_memory;
+ newsect = (asection *) bfd_zalloc (abfd, sizeof (asection));
+ if (newsect == NULL)
return NULL;
- }
newsect->name = name;
newsect->index = abfd->section_count++;
newsect->flags = SEC_NO_FLAGS;
- newsect->userdata = 0;
- newsect->next = (asection *)NULL;
- newsect->relocation = (arelent *)NULL;
+ newsect->userdata = NULL;
+ newsect->contents = NULL;
+ newsect->next = (asection *) NULL;
+ newsect->relocation = (arelent *) NULL;
newsect->reloc_count = 0;
- newsect->line_filepos =0;
+ newsect->line_filepos = 0;
newsect->owner = abfd;
/* Create a symbol whos only job is to point to this section. This is
useful for things like relocs which are relative to the base of a
section. */
- newsect->symbol = bfd_make_empty_symbol(abfd);
+ newsect->symbol = bfd_make_empty_symbol (abfd);
+ if (newsect->symbol == NULL)
+ return NULL;
newsect->symbol->name = name;
newsect->symbol->value = 0;
newsect->symbol->section = newsect;
newsect->symbol_ptr_ptr = &newsect->symbol;
- if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) {
- free (newsect);
- return NULL;
- }
+ if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true)
+ {
+ free (newsect);
+ return NULL;
+ }
*prev = newsect;
return newsect;
asection *bfd_make_section(bfd *, CONST char *name);
DESCRIPTION
- Like <<bfd_make_section_anyway>>, but return NULL (without setting
- bfd_error) without changing the section chain if there is already a
- section named @var{name}. If there is an error, return NULL and set
- bfd_error.
+ Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
+ bfd_set_error ()) without changing the section chain if there is already a
+ section named @var{name}. If there is an error, return <<NULL>> and set
+ <<bfd_error>>.
*/
-sec_ptr
-DEFUN(bfd_make_section,(abfd, name),
- bfd *abfd AND
- CONST char * name)
+asection *
+bfd_make_section (abfd, name)
+ bfd *abfd;
+ CONST char *name;
{
- asection * sect = abfd->sections;
-
- if (strcmp(name, BFD_ABS_SECTION_NAME) == 0)
- {
- return &bfd_abs_section;
- }
- if (strcmp(name, BFD_COM_SECTION_NAME) == 0)
- {
- return &bfd_com_section;
- }
- if (strcmp(name, BFD_UND_SECTION_NAME) == 0)
- {
- return &bfd_und_section;
- }
-
- if (strcmp(name, BFD_IND_SECTION_NAME) == 0)
- {
- return &bfd_ind_section;
- }
-
- while (sect) {
- if (!strcmp(sect->name, name)) return NULL;
- sect = sect->next;
- }
+ asection *sect = abfd->sections;
+
+ if (strcmp (name, BFD_ABS_SECTION_NAME) == 0)
+ {
+ return bfd_abs_section_ptr;
+ }
+ if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
+ {
+ return bfd_com_section_ptr;
+ }
+ if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
+ {
+ return bfd_und_section_ptr;
+ }
+
+ if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
+ {
+ return bfd_ind_section_ptr;
+ }
+
+ while (sect)
+ {
+ if (!strcmp (sect->name, name))
+ return NULL;
+ sect = sect->next;
+ }
/* The name is not already used; go ahead and make a new section. */
return bfd_make_section_anyway (abfd, name);
DESCRIPTION
Set the attributes of the section @var{sec} in the BFD
- @var{abfd} to the value @var{flags}. Returns <<true>> on success,
+ @var{abfd} to the value @var{flags}. Return <<true>> on success,
<<false>> on error. Possible error returns are:
- o invalid operation -
+ o <<bfd_error_invalid_operation>> -
The section cannot have one or more of the attributes
requested. For example, a .bss section in <<a.out>> may not
have the <<SEC_HAS_CONTENTS>> field set.
*/
+/*ARGSUSED*/
boolean
-DEFUN(bfd_set_section_flags,(abfd, section, flags),
- bfd *abfd AND
- sec_ptr section AND
- flagword flags)
+bfd_set_section_flags (abfd, section, flags)
+ bfd *abfd ATTRIBUTE_UNUSED;
+ sec_ptr section;
+ flagword flags;
{
#if 0
/* If you try to copy a text section from an input file (where it
the bfd_applicable_section_flags (abfd) doesn't have the SEC_CODE
set - which it doesn't, at least not for a.out. FIXME */
- if ((flags & bfd_applicable_section_flags (abfd)) != flags) {
- bfd_error = invalid_operation;
- return false;
- }
+ if ((flags & bfd_applicable_section_flags (abfd)) != flags)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
#endif
section->flags = flags;
DESCRIPTION
Call the provided function @var{func} for each section
attached to the BFD @var{abfd}, passing @var{obj} as an
- argument. The function will be called as if by
+ argument. The function will be called as if by
| func(abfd, the_section, obj);
/*VARARGS2*/
void
-DEFUN(bfd_map_over_sections,(abfd, operation, user_storage),
- bfd *abfd AND
- void (*operation) PARAMS ((bfd *abfd, asection *sect, PTR obj)) AND
- PTR user_storage)
+bfd_map_over_sections (abfd, operation, user_storage)
+ bfd *abfd;
+ void (*operation) PARAMS ((bfd * abfd, asection * sect, PTR obj));
+ 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);
- if (i != abfd->section_count) /* Debugging */
- abort();
+ if (i != abfd->section_count) /* Debugging */
+ abort ();
}
DESCRIPTION
Set @var{sec} to the size @var{val}. If the operation is
- ok, then <<true>> is returned, else <<false>>.
+ ok, then <<true>> is returned, else <<false>>.
Possible error returns:
- o invalid_operation -
- Writing has started to the BFD, so setting the size is invalid
+ o <<bfd_error_invalid_operation>> -
+ Writing has started to the BFD, so setting the size is invalid.
*/
boolean
-DEFUN(bfd_set_section_size,(abfd, ptr, val),
- bfd *abfd AND
- sec_ptr ptr AND
- bfd_size_type val)
+bfd_set_section_size (abfd, ptr, val)
+ bfd *abfd;
+ sec_ptr ptr;
+ bfd_size_type val;
{
/* Once you've started writing to any section you cannot create or change
the size of any others. */
- if (abfd->output_has_begun) {
- bfd_error = invalid_operation;
- return false;
- }
+ if (abfd->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
ptr->_cooked_size = val;
ptr->_raw_size = val;
-
+
return true;
}
SYNOPSIS
boolean bfd_set_section_contents
- (bfd *abfd,
+ (bfd *abfd,
asection *section,
PTR data,
file_ptr offset,
Sets the contents of the section @var{section} in BFD
@var{abfd} to the data starting in memory at @var{data}. The
data is written to the output section starting at offset
- @var{offset} for @var{count} bytes.
+ @var{offset} for @var{count} bytes.
Normally <<true>> is returned, else <<false>>. Possible error
returns are:
- o no_contents -
+ o <<bfd_error_no_contents>> -
The output section does not have the <<SEC_HAS_CONTENTS>>
attribute, so nothing can be written to it.
o and some more too
: bfd_get_section_size_before_reloc (sec))
boolean
-DEFUN(bfd_set_section_contents,(abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
+bfd_set_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
{
bfd_size_type sz;
- if (!bfd_get_section_flags(abfd, section) & SEC_HAS_CONTENTS)
- {
- bfd_error = no_contents;
- return(false);
- }
+ if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS))
+ {
+ bfd_set_error (bfd_error_no_contents);
+ return (false);
+ }
if (offset < 0)
{
bad_val:
- bfd_error = bad_value;
+ bfd_set_error (bfd_error_bad_value);
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;
switch (abfd->direction)
{
- case read_direction:
- case no_direction:
- bfd_error = invalid_operation;
- return false;
+ case read_direction:
+ case no_direction:
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
- case write_direction:
- break;
+ case write_direction:
+ break;
- case both_direction:
- /* File is opened for update. `output_has_begun' some time ago when
+ case both_direction:
+ /* File is opened for update. `output_has_begun' some time ago when
the file was created. Do not recompute sections sizes or alignments
in _bfd_set_section_content. */
- abfd->output_has_begun = true;
- break;
+ abfd->output_has_begun = true;
+ break;
}
if (BFD_SEND (abfd, _bfd_set_section_contents,
- (abfd, section, location, offset, count)))
- {
- abfd->output_has_begun = true;
- return true;
- }
+ (abfd, section, location, offset, count)))
+ {
+ abfd->output_has_begun = true;
+ return true;
+ }
return false;
}
bfd_get_section_contents
SYNOPSIS
- boolean bfd_get_section_contents
+ boolean bfd_get_section_contents
(bfd *abfd, asection *section, PTR location,
file_ptr offset, bfd_size_type count);
offset of @var{offset} from the start of the input section,
and is read for @var{count} bytes.
- If the contents of a constuctor with the <<SEC_CONSTUCTOR>>
- flag set are requested, then the @var{location} is filled with
- zeroes. If no errors occur, <<true>> is returned, else
+ If the contents of a constructor with the <<SEC_CONSTRUCTOR>>
+ flag set are requested or if the section does not have the
+ <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled
+ with zeroes. If no errors occur, <<true>> is returned, else
<<false>>.
*/
boolean
-DEFUN(bfd_get_section_contents,(abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
+bfd_get_section_contents (abfd, section, location, offset, count)
+ bfd *abfd;
+ sec_ptr section;
+ PTR location;
+ file_ptr offset;
+ bfd_size_type count;
{
bfd_size_type sz;
- if (section->flags & SEC_CONSTRUCTOR)
+ if (section->flags & SEC_CONSTRUCTOR)
{
- memset(location, 0, (unsigned)count);
+ memset (location, 0, (unsigned) count);
return true;
}
if (offset < 0)
{
bad_val:
- bfd_error = bad_value;
+ bfd_set_error (bfd_error_bad_value);
return false;
}
- sz = bfd_get_section_size_now (abfd, section);
- if (offset > sz
- || count > sz
- || offset + count > sz)
+ /* Even if reloc_done is true, this function reads unrelocated
+ contents, so we want the raw size. */
+ sz = section->_raw_size;
+ if ((bfd_size_type) offset > sz || count > sz || offset + count > sz)
goto bad_val;
if (count == 0)
/* Don't bother. */
return true;
+ if ((section->flags & SEC_HAS_CONTENTS) == 0)
+ {
+ memset (location, 0, (unsigned) count);
+ return true;
+ }
+
+ if ((section->flags & SEC_IN_MEMORY) != 0)
+ {
+ 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))
+*/
+
+/*
+FUNCTION
+ _bfd_strip_section_from_output
+
+SYNOPSIS
+ void _bfd_strip_section_from_output
+ (asection *section);
+
+DESCRIPTION
+ Remove @var{section} from the output. If the output section becomes
+ empty, remove it from the output bfd.
+*/
+void
+_bfd_strip_section_from_output (s)
+ asection *s;
+{
+ asection **spp, *os;
+ struct bfd_link_order *p, *pp;
+
+ /* Excise the input section from the link order. */
+ os = s->output_section;
+ for (p = os->link_order_head, pp = NULL; p != NULL; pp = p, p = p->next)
+ if (p->type == bfd_indirect_link_order
+ && p->u.indirect.section == s)
+ {
+ if (pp)
+ pp->next = p->next;
+ else
+ os->link_order_head = p->next;
+ if (!p->next)
+ os->link_order_tail = pp;
+ break;
+ }
+
+ /* If the output section is empty, remove it too. Careful about sections
+ that have been discarded in the link script -- they are mapped to
+ bfd_abs_section, which has no owner. */
+ if (!os->link_order_head && os->owner)
+ {
+ for (spp = &os->owner->sections; *spp; spp = &(*spp)->next)
+ if (*spp == os)
+ {
+ *spp = os->next;
+ os->owner->section_count--;
+ break;
+ }
+ }
+}
projects / deliverable / binutils-gdb.git / blobdiff