/* Object file "section" support for the BFD library.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002
+ 2000, 2001, 2002, 2003
Free Software Foundation, Inc.
Written by Cygnus Support.
. {* A mark flag used by some linker backends for garbage collection. *}
. unsigned int gc_mark : 1;
.
-. {* Used by the ELF code to mark sections which have been allocated
-. to segments. *}
+. {* The following flags are used by the ELF linker. *}
+.
+. {* Mark sections which have been allocated to segments. *}
. unsigned int segment_mark : 1;
.
+. {* Type of sec_info information. *}
+. unsigned int sec_info_type:3;
+.#define ELF_INFO_TYPE_NONE 0
+.#define ELF_INFO_TYPE_STABS 1
+.#define ELF_INFO_TYPE_MERGE 2
+.#define ELF_INFO_TYPE_EH_FRAME 3
+.#define ELF_INFO_TYPE_JUST_SYMS 4
+.
+. {* Nonzero if this section uses RELA relocations, rather than REL. *}
+. unsigned int use_rela_p:1;
+.
+. {* Bits used by various backends. *}
+. unsigned int has_tls_reloc:1;
+.
+. {* Nonzero if this section needs the relax finalize pass. *}
+. unsigned int need_finalize_relax:1;
+.
+. {* Nonzero if this section has a gp reloc. *}
+. unsigned int has_gp_reloc:1;
+.
+. {* Usused bits. *}
+. unsigned int flag13:1;
+. unsigned int flag14:1;
+. unsigned int flag15:1;
+. unsigned int flag16:4;
+. unsigned int flag20:4;
+. unsigned int flag24:8;
+.
. {* End of internal packed boolean fields. *}
.
. {* The virtual memory address of the section - where it will be
. file_ptr line_filepos;
.
. {* Pointer to data for applications. *}
-. PTR userdata;
+. void *userdata;
.
. {* If the SEC_IN_MEMORY flag is set, this points to the actual
. contents. *}
. {* Optional information about a COMDAT entry; NULL if not COMDAT. *}
. struct bfd_comdat_info *comdat;
.
+. {* Points to the kept section if this section is a link-once section,
+. and is discarded. *}
+. struct sec *kept_section;
+.
. {* When a section is being output, this value changes as more
. linenumbers are written out. *}
. file_ptr moving_line_filepos;
. {* What the section number is in the target world. *}
. int target_index;
.
-. PTR used_by_bfd;
+. void *used_by_bfd;
.
. {* If this is a constructor section then here is a list of the
. relocations created to relocate items within it. *}
.#define BFD_IND_SECTION_NAME "*IND*"
.
.{* The absolute section. *}
-.extern const asection bfd_abs_section;
+.extern 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 const asection bfd_und_section;
+.extern 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 const asection bfd_com_section;
+.extern asection bfd_com_section;
.#define bfd_com_section_ptr ((asection *) &bfd_com_section)
.{* Pointer to the indirect section. *}
-.extern const asection bfd_ind_section;
+.extern asection bfd_ind_section;
.#define bfd_ind_section_ptr ((asection *) &bfd_ind_section)
.#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
.
#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
- const asection SEC = \
+ asection SEC = \
/* name, id, index, next, flags, user_set_vma, reloc_done, */ \
{ NAME, IDX, 0, NULL, FLAGS, 0, 0, \
\
/* linker_mark, linker_has_input, gc_mark, segment_mark, */ \
0, 0, 1, 0, \
\
+ /* sec_info_type, use_rela_p, has_tls_reloc, */ \
+ 0, 0, 0, \
+ \
+ /* need_finalize_relax, has_gp_reloc, */ \
+ 0, 0, \
+ \
+ /* flag13, flag14, flag15, flag16, flag20, flag24, */ \
+ 0, 0, 0, 0, 0, 0, \
+ \
/* vma, lma, _cooked_size, _raw_size, */ \
0, 0, 0, 0, \
\
/* line_filepos, userdata, contents, lineno, lineno_count, */ \
0, NULL, NULL, NULL, 0, \
\
- /* entsize, comdat, moving_line_filepos, */ \
- 0, NULL, 0, \
+ /* entsize, comdat, kept_section, moving_line_filepos, */ \
+ 0, NULL, NULL, 0, \
\
/* target_index, used_by_bfd, constructor_chain, owner, */ \
0, NULL, NULL, NULL, \
/* Initialize an entry in the section hash table. */
struct bfd_hash_entry *
-bfd_section_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
+bfd_section_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
{
/* Allocate the structure if it has not already been allocated by a
subclass. */
if (entry == NULL)
{
- entry = bfd_hash_allocate (table, sizeof (struct section_hash_entry));
+ entry = (struct bfd_hash_entry *)
+ bfd_hash_allocate (table, sizeof (struct section_hash_entry));
if (entry == NULL)
return entry;
}
/* Call the allocation method of the superclass. */
entry = bfd_hash_newfunc (entry, table, string);
if (entry != NULL)
- {
- memset ((PTR) &((struct section_hash_entry *) entry)->section,
- 0, sizeof (asection));
- }
+ memset (&((struct section_hash_entry *) entry)->section, 0,
+ sizeof (asection));
return entry;
}
/* Initializes a new section. NEWSECT->NAME is already set. */
-static asection *bfd_section_init PARAMS ((bfd *, asection *));
-
static asection *
-bfd_section_init (abfd, newsect)
- bfd *abfd;
- asection *newsect;
+bfd_section_init (bfd *abfd, asection *newsect)
{
static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
*/
void
-bfd_section_list_clear (abfd)
- bfd *abfd;
+bfd_section_list_clear (bfd *abfd)
{
abfd->sections = NULL;
abfd->section_tail = &abfd->sections;
abfd->section_count = 0;
- memset ((PTR) abfd->section_htab.table, 0,
+ memset (abfd->section_htab.table, 0,
abfd->section_htab.size * sizeof (struct bfd_hash_entry *));
}
bfd_get_section_by_name
SYNOPSIS
- asection *bfd_get_section_by_name(bfd *abfd, const char *name);
+ asection *bfd_get_section_by_name (bfd *abfd, const char *name);
DESCRIPTION
Run through @var{abfd} and return the one of the
*/
asection *
-bfd_get_section_by_name (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_get_section_by_name (bfd *abfd, const char *name)
{
struct section_hash_entry *sh;
- sh = section_hash_lookup (&abfd->section_htab, name, false, false);
+ sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);
if (sh != NULL)
return &sh->section;
bfd_get_unique_section_name
SYNOPSIS
- char *bfd_get_unique_section_name(bfd *abfd,
- const char *templat,
- int *count);
+ char *bfd_get_unique_section_name
+ (bfd *abfd, const char *templat, int *count);
DESCRIPTION
Invent a section name that is unique in @var{abfd} by tacking
*/
char *
-bfd_get_unique_section_name (abfd, templat, count)
- bfd *abfd;
- const char *templat;
- int *count;
+bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count)
{
int num;
unsigned int len;
char *sname;
len = strlen (templat);
- sname = bfd_malloc ((bfd_size_type) len + 8);
+ sname = bfd_malloc (len + 8);
if (sname == NULL)
return NULL;
- strcpy (sname, templat);
+ memcpy (sname, templat, len);
num = 1;
if (count != NULL)
num = *count;
abort ();
sprintf (sname + len, ".%d", num++);
}
- while (section_hash_lookup (&abfd->section_htab, sname, false, false));
+ while (section_hash_lookup (&abfd->section_htab, sname, FALSE, FALSE));
if (count != NULL)
*count = num;
bfd_make_section_old_way
SYNOPSIS
- asection *bfd_make_section_old_way(bfd *abfd, const char *name);
+ asection *bfd_make_section_old_way (bfd *abfd, const char *name);
DESCRIPTION
Create a new empty section called @var{name}
*/
asection *
-bfd_make_section_old_way (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section_old_way (bfd *abfd, const char *name)
{
struct section_hash_entry *sh;
asection *newsect;
if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
return bfd_ind_section_ptr;
- sh = section_hash_lookup (&abfd->section_htab, name, true, false);
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
if (sh == NULL)
return NULL;
bfd_make_section_anyway
SYNOPSIS
- asection *bfd_make_section_anyway(bfd *abfd, const char *name);
+ asection *bfd_make_section_anyway (bfd *abfd, const char *name);
DESCRIPTION
Create a new empty section called @var{name} and attach it to the end of
*/
sec_ptr
-bfd_make_section_anyway (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section_anyway (bfd *abfd, const char *name)
{
struct section_hash_entry *sh;
asection *newsect;
return NULL;
}
- sh = section_hash_lookup (&abfd->section_htab, name, true, false);
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
if (sh == NULL)
return NULL;
section_htab without generating a unique section name and
that would be pointless; We don't need to traverse the
hash table. */
- newsect = (asection *) bfd_zalloc (abfd, sizeof (asection));
+ newsect = bfd_zalloc (abfd, sizeof (asection));
if (newsect == NULL)
return NULL;
}
bfd_make_section
SYNOPSIS
- asection *bfd_make_section(bfd *, const char *name);
+ asection *bfd_make_section (bfd *, const char *name);
DESCRIPTION
Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
*/
asection *
-bfd_make_section (abfd, name)
- bfd *abfd;
- const char *name;
+bfd_make_section (bfd *abfd, const char *name)
{
struct section_hash_entry *sh;
asection *newsect;
|| strcmp (name, BFD_IND_SECTION_NAME) == 0)
return NULL;
- sh = section_hash_lookup (&abfd->section_htab, name, true, false);
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
if (sh == NULL)
return NULL;
if (newsect->name != NULL)
{
/* Section already exists. */
- return newsect;
+ return NULL;
}
newsect->name = name;
bfd_set_section_flags
SYNOPSIS
- boolean bfd_set_section_flags(bfd *abfd, asection *sec, flagword flags);
+ bfd_boolean bfd_set_section_flags
+ (bfd *abfd, asection *sec, flagword flags);
DESCRIPTION
Set the attributes of the section @var{sec} in the BFD
- @var{abfd} to the value @var{flags}. Return <<true>> on success,
- <<false>> on error. Possible error returns are:
+ @var{abfd} to the value @var{flags}. Return <<TRUE>> on success,
+ <<FALSE>> on error. Possible error returns are:
o <<bfd_error_invalid_operation>> -
The section cannot have one or more of the attributes
*/
/*ARGSUSED*/
-boolean
-bfd_set_section_flags (abfd, section, flags)
- bfd *abfd ATTRIBUTE_UNUSED;
- sec_ptr section;
- flagword flags;
+bfd_boolean
+bfd_set_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
if ((flags & bfd_applicable_section_flags (abfd)) != flags)
{
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
#endif
section->flags = flags;
- return true;
+ return TRUE;
}
/*
bfd_map_over_sections
SYNOPSIS
- void bfd_map_over_sections(bfd *abfd,
- void (*func) (bfd *abfd,
- asection *sect,
- PTR obj),
- PTR obj);
+ void bfd_map_over_sections
+ (bfd *abfd,
+ void (*func) (bfd *abfd, asection *sect, void *obj),
+ void *obj);
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
-| func(abfd, the_section, obj);
+| func (abfd, the_section, obj);
This is the prefered method for iterating over sections; an
alternative would be to use a loop:
| section *p;
| for (p = abfd->sections; p != NULL; p = p->next)
-| func(abfd, p, ...)
+| func (abfd, p, ...)
*/
/*VARARGS2*/
void
-bfd_map_over_sections (abfd, operation, user_storage)
- bfd *abfd;
- void (*operation) PARAMS ((bfd * abfd, asection * sect, PTR obj));
- PTR user_storage;
+bfd_map_over_sections (bfd *abfd,
+ void (*operation) (bfd *, asection *, void *),
+ void *user_storage)
{
asection *sect;
unsigned int i = 0;
bfd_set_section_size
SYNOPSIS
- boolean bfd_set_section_size(bfd *abfd, asection *sec, bfd_size_type val);
+ bfd_boolean bfd_set_section_size
+ (bfd *abfd, asection *sec, bfd_size_type val);
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 <<bfd_error_invalid_operation>> -
*/
-boolean
-bfd_set_section_size (abfd, ptr, val)
- bfd *abfd;
- sec_ptr ptr;
- bfd_size_type val;
+bfd_boolean
+bfd_set_section_size (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_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
}
ptr->_cooked_size = val;
ptr->_raw_size = val;
- return true;
+ return TRUE;
}
/*
bfd_set_section_contents
SYNOPSIS
- boolean bfd_set_section_contents (bfd *abfd, asection *section,
- PTR data, file_ptr offset,
- bfd_size_type count);
+ bfd_boolean bfd_set_section_contents
+ (bfd *abfd, asection *section, void *data, file_ptr offset,
+ bfd_size_type count);
DESCRIPTION
Sets the contents of the section @var{section} in BFD
data is written to the output section starting at offset
@var{offset} for @var{count} octets.
- Normally <<true>> is returned, else <<false>>. Possible error
+ Normally <<TRUE>> is returned, else <<FALSE>>. Possible error
returns are:
o <<bfd_error_no_contents>> -
The output section does not have the <<SEC_HAS_CONTENTS>>
*/
-#define bfd_get_section_size_now(abfd,sec) \
-(sec->reloc_done \
- ? bfd_get_section_size_after_reloc (sec) \
- : bfd_get_section_size_before_reloc (sec))
-
-boolean
-bfd_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
+#define bfd_get_section_size_now(abfd, sec) \
+ (sec->reloc_done \
+ ? bfd_get_section_size_after_reloc (sec) \
+ : bfd_get_section_size_before_reloc (sec))
+
+bfd_boolean
+bfd_set_section_contents (bfd *abfd,
+ sec_ptr section,
+ void *location,
+ file_ptr offset,
+ bfd_size_type count)
{
bfd_size_type sz;
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);
|| count != (size_t) count)
{
bfd_set_error (bfd_error_bad_value);
- return false;
+ return FALSE;
}
switch (abfd->direction)
case read_direction:
case no_direction:
bfd_set_error (bfd_error_invalid_operation);
- return false;
+ return FALSE;
case write_direction:
break;
/* 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;
+ 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->output_has_begun = TRUE;
+ return TRUE;
}
- return false;
+ return FALSE;
}
/*
bfd_get_section_contents
SYNOPSIS
- boolean bfd_get_section_contents (bfd *abfd, asection *section,
- PTR location, file_ptr offset,
- bfd_size_type count);
+ bfd_boolean bfd_get_section_contents
+ (bfd *abfd, asection *section, void *location, file_ptr offset,
+ bfd_size_type count);
DESCRIPTION
Read data from @var{section} in BFD @var{abfd}
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>>.
+ with zeroes. If no errors occur, <<TRUE>> is returned, else
+ <<FALSE>>.
*/
-boolean
-bfd_get_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- bfd_size_type count;
+bfd_boolean
+bfd_get_section_contents (bfd *abfd,
+ sec_ptr section,
+ void *location,
+ file_ptr offset,
+ bfd_size_type count)
{
bfd_size_type sz;
if (section->flags & SEC_CONSTRUCTOR)
{
memset (location, 0, (size_t) count);
- return true;
+ return TRUE;
}
- /* Even if reloc_done is true, this function reads unrelocated
+ /* 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 != (size_t) count)
{
bfd_set_error (bfd_error_bad_value);
- return false;
+ return FALSE;
}
if (count == 0)
/* Don't bother. */
- return true;
+ return TRUE;
if ((section->flags & SEC_HAS_CONTENTS) == 0)
{
memset (location, 0, (size_t) count);
- return true;
+ return TRUE;
}
if ((section->flags & SEC_IN_MEMORY) != 0)
{
memcpy (location, section->contents + offset, (size_t) count);
- return true;
+ return TRUE;
}
return BFD_SEND (abfd, _bfd_get_section_contents,
bfd_copy_private_section_data
SYNOPSIS
- boolean bfd_copy_private_section_data (bfd *ibfd, asection *isec,
- bfd *obfd, asection *osec);
+ bfd_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
+ Return <<TRUE>> on success, <<FALSE>> on error. Possible error
returns are:
o <<bfd_error_no_memory>> -
SYNOPSIS
void _bfd_strip_section_from_output
- (struct bfd_link_info *info, asection *section);
+ (struct bfd_link_info *info, asection *section);
DESCRIPTION
Remove @var{section} from the output. If the output section
- becomes empty, remove it from the output bfd. @var{info} may
- be NULL; if it is not, it is used to decide whether the output
- section is empty.
+ becomes empty, remove it from the output bfd.
+
+ This function won't actually do anything except twiddle flags
+ if called too late in the linking process, when it's not safe
+ to remove sections.
*/
void
-_bfd_strip_section_from_output (info, s)
- struct bfd_link_info *info;
- asection *s;
+_bfd_strip_section_from_output (struct bfd_link_info *info, asection *s)
{
- asection **spp, *os;
- struct bfd_link_order *p, *pp;
- boolean keep_os;
+ asection *os;
+ asection *is;
+ bfd *abfd;
- /* Excise the input section from the link order.
+ s->flags |= SEC_EXCLUDE;
- FIXME: For all calls that I can see to this function, the link
- orders have not yet been set up. So why are we checking them? --
- Ian */
+ /* If the section wasn't assigned to an output section, or the
+ section has been discarded by the linker script, there's nothing
+ more to do. */
os = s->output_section;
-
- /* Handle a section that wasn't output. */
- if (os == NULL)
+ if (os == NULL || os->owner == NULL)
return;
- 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;
- }
-
- keep_os = os->link_order_head != NULL;
-
- if (! keep_os && info != NULL)
- {
- bfd *abfd;
- for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
- {
- asection *is;
- for (is = abfd->sections; is != NULL; is = is->next)
- {
- if (is != s && is->output_section == os
- && (is->flags & SEC_EXCLUDE) == 0)
- break;
- }
- if (is != NULL)
- break;
- }
- if (abfd != NULL)
- keep_os = true;
- }
-
- /* 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 (!keep_os && os->owner != NULL)
- {
- for (spp = &os->owner->sections; *spp; spp = &(*spp)->next)
- if (*spp == os)
- {
- bfd_section_list_remove (os->owner, spp);
- os->owner->section_count--;
- break;
- }
- }
+ /* If the output section has other (non-excluded) input sections, we
+ can't remove it. */
+ for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next)
+ for (is = abfd->sections; is != NULL; is = is->next)
+ if (is->output_section == os && (is->flags & SEC_EXCLUDE) == 0)
+ return;
- s->flags |= SEC_EXCLUDE;
+ /* If the output section is empty, flag it for removal too.
+ See ldlang.c:strip_excluded_output_sections for the action. */
+ os->flags |= SEC_EXCLUDE;
}
/*
bfd_generic_discard_group
SYNOPSIS
- boolean bfd_generic_discard_group (bfd *abfd, asection *group);
+ bfd_boolean bfd_generic_discard_group (bfd *abfd, asection *group);
DESCRIPTION
Remove all members of @var{group} from the output.
*/
-boolean
-bfd_generic_discard_group (abfd, group)
- bfd *abfd ATTRIBUTE_UNUSED;
- asection *group ATTRIBUTE_UNUSED;
+bfd_boolean
+bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *group ATTRIBUTE_UNUSED)
{
- return true;
+ return TRUE;
}
projects / deliverable / binutils-gdb.git / blobdiff