/* Object file "section" support for the BFD library.
- Copyright (C) 1990-2017 Free Software Foundation, Inc.
+ Copyright (C) 1990-2020 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
data in place until a <<bfd_get_section_contents>> call is
made. Other back ends may read in all the data at once. For
example, an S-record file has to be read once to determine the
- size of the data. An IEEE-695 file doesn't contain raw data in
- sections, but data and relocation expressions intermixed, so
- the data area has to be parsed to get out the data and
- relocations.
+ size of the data.
INODE
Section Output, typedef asection, Section Input, Sections
. {* A unique sequence number. *}
. unsigned int id;
.
+. {* A unique section number which can be used by assembler to
+. distinguish different sections with the same section name. *}
+. unsigned int section_id;
+.
. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *}
. unsigned int index;
.
. {* The section contains thread local data. *}
.#define SEC_THREAD_LOCAL 0x400
.
-. {* The section has GOT references. This flag is only for the
-. linker, and is currently only used by the elf32-hppa back end.
-. It will be set if global offset table references were detected
-. in this section, which indicate to the linker that the section
-. contains PIC code, and must be handled specially when doing a
-. static link. *}
-.#define SEC_HAS_GOT_REF 0x800
+. {* The section's size is fixed. Generic linker code will not
+. recalculate it and it is up to whoever has set this flag to
+. get the size right. *}
+.#define SEC_FIXED_SIZE 0x800
.
. {* The section contains common symbols (symbols may be defined
. multiple times, the value of a symbol is the amount of
. else up the line will take care of it later. *}
.#define SEC_LINKER_CREATED 0x100000
.
+. {* This section contains a section ID to distinguish different
+. sections with the same section name. *}
+.#define SEC_ASSEMBLER_SECTION_ID 0x100000
+.
. {* This section should not be subject to garbage collection.
. Also set to inform the linker that this section should not be
. listed in the link map as discarded. *}
. {* This section contains vliw code. This is for Toshiba MeP only. *}
.#define SEC_MEP_VLIW 0x20000000
.
+. {* All symbols, sizes and relocations in this section are octets
+. instead of bytes. Required for DWARF debug sections as DWARF
+. information is organized in octets, not bytes. *}
+.#define SEC_ELF_OCTETS 0x40000000
+.
. {* Indicate that section has the no read flag set. This happens
. when memory read flag isn't set. *}
.#define SEC_COFF_NOREAD 0x40000000
. {* Early in the link process, map_head and map_tail are used to build
. a list of input sections attached to an output section. Later,
. output sections use these fields for a list of bfd_link_order
-. structs. *}
+. structs. The linked_to_symbol_name field is for ELF assembler
+. internal use. *}
. union {
. struct bfd_link_order *link_order;
. struct bfd_section *s;
+. const char *linked_to_symbol_name;
. } map_head, map_tail;
+. {* Points to the output section this section is already assigned to, if any.
+. This is used when support for non-contiguous memory regions is enabled. *}
+. struct bfd_section *already_assigned;
+.
.} asection;
.
.{* Relax table contains information about instructions which can
. int size;
.};
.
+.static inline const char *
+.bfd_section_name (const asection *sec)
+.{
+. return sec->name;
+.}
+.
+.static inline bfd_size_type
+.bfd_section_size (const asection *sec)
+.{
+. return sec->size;
+.}
+.
+.static inline bfd_vma
+.bfd_section_vma (const asection *sec)
+.{
+. return sec->vma;
+.}
+.
+.static inline bfd_vma
+.bfd_section_lma (const asection *sec)
+.{
+. return sec->lma;
+.}
+.
+.static inline unsigned int
+.bfd_section_alignment (const asection *sec)
+.{
+. return sec->alignment_power;
+.}
+.
+.static inline flagword
+.bfd_section_flags (const asection *sec)
+.{
+. return sec->flags;
+.}
+.
+.static inline void *
+.bfd_section_userdata (const asection *sec)
+.{
+. return sec->userdata;
+.}
+.static inline bfd_boolean
+.bfd_is_com_section (const asection *sec)
+.{
+. return (sec->flags & SEC_IS_COMMON) != 0;
+.}
+.
.{* Note: the following are provided as inline functions rather than macros
. because not all callers use the return value. A macro implementation
. would use a comma expression, eg: "((ptr)->foo = val, TRUE)" and some
. compilers will complain about comma expressions that have no effect. *}
.static inline bfd_boolean
-.bfd_set_section_userdata (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr,
-. void * val)
+.bfd_set_section_userdata (asection *sec, void *val)
+.{
+. sec->userdata = val;
+. return TRUE;
+.}
+.
+.static inline bfd_boolean
+.bfd_set_section_vma (asection *sec, bfd_vma val)
.{
-. ptr->userdata = val;
+. sec->vma = sec->lma = val;
+. sec->user_set_vma = TRUE;
. return TRUE;
.}
.
.static inline bfd_boolean
-.bfd_set_section_vma (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr, bfd_vma val)
+.bfd_set_section_lma (asection *sec, bfd_vma val)
.{
-. ptr->vma = ptr->lma = val;
-. ptr->user_set_vma = TRUE;
+. sec->lma = val;
. return TRUE;
.}
.
.static inline bfd_boolean
-.bfd_set_section_alignment (bfd * abfd ATTRIBUTE_UNUSED, asection * ptr,
-. unsigned int val)
+.bfd_set_section_alignment (asection *sec, unsigned int val)
.{
-. ptr->alignment_power = val;
+. sec->alignment_power = val;
. return TRUE;
.}
.
.{* Pointer to the indirect section. *}
.#define bfd_ind_section_ptr (&_bfd_std_section[3])
.
-.#define bfd_is_und_section(sec) ((sec) == bfd_und_section_ptr)
-.#define bfd_is_abs_section(sec) ((sec) == bfd_abs_section_ptr)
-.#define bfd_is_ind_section(sec) ((sec) == bfd_ind_section_ptr)
-.
-.#define bfd_is_const_section(SEC) \
-. ( ((SEC) == bfd_abs_section_ptr) \
-. || ((SEC) == bfd_und_section_ptr) \
-. || ((SEC) == bfd_com_section_ptr) \
-. || ((SEC) == bfd_ind_section_ptr))
-.
-.{* Macros to handle insertion and deletion of a bfd's sections. These
-. only handle the list pointers, ie. do not adjust section_count,
-. target_index etc. *}
-.#define bfd_section_list_remove(ABFD, S) \
-. do \
-. { \
-. asection *_s = S; \
-. asection *_next = _s->next; \
-. asection *_prev = _s->prev; \
-. if (_prev) \
-. _prev->next = _next; \
-. else \
-. (ABFD)->sections = _next; \
-. if (_next) \
-. _next->prev = _prev; \
-. else \
-. (ABFD)->section_last = _prev; \
-. } \
-. while (0)
-.#define bfd_section_list_append(ABFD, S) \
-. do \
-. { \
-. asection *_s = S; \
-. bfd *_abfd = ABFD; \
-. _s->next = NULL; \
-. if (_abfd->section_last) \
-. { \
-. _s->prev = _abfd->section_last; \
-. _abfd->section_last->next = _s; \
-. } \
-. else \
-. { \
-. _s->prev = NULL; \
-. _abfd->sections = _s; \
-. } \
-. _abfd->section_last = _s; \
-. } \
-. while (0)
-.#define bfd_section_list_prepend(ABFD, S) \
-. do \
-. { \
-. asection *_s = S; \
-. bfd *_abfd = ABFD; \
-. _s->prev = NULL; \
-. if (_abfd->sections) \
-. { \
-. _s->next = _abfd->sections; \
-. _abfd->sections->prev = _s; \
-. } \
-. else \
-. { \
-. _s->next = NULL; \
-. _abfd->section_last = _s; \
-. } \
-. _abfd->sections = _s; \
-. } \
-. while (0)
-.#define bfd_section_list_insert_after(ABFD, A, S) \
-. do \
-. { \
-. asection *_a = A; \
-. asection *_s = S; \
-. asection *_next = _a->next; \
-. _s->next = _next; \
-. _s->prev = _a; \
-. _a->next = _s; \
-. if (_next) \
-. _next->prev = _s; \
-. else \
-. (ABFD)->section_last = _s; \
-. } \
-. while (0)
-.#define bfd_section_list_insert_before(ABFD, B, S) \
-. do \
-. { \
-. asection *_b = B; \
-. asection *_s = S; \
-. asection *_prev = _b->prev; \
-. _s->prev = _prev; \
-. _s->next = _b; \
-. _b->prev = _s; \
-. if (_prev) \
-. _prev->next = _s; \
-. else \
-. (ABFD)->sections = _s; \
-. } \
-. while (0)
-.#define bfd_section_removed_from_list(ABFD, S) \
-. ((S)->next == NULL ? (ABFD)->section_last != (S) : (S)->next->prev != (S))
+.static inline bfd_boolean
+.bfd_is_und_section (const asection *sec)
+.{
+. return sec == bfd_und_section_ptr;
+.}
+.
+.static inline bfd_boolean
+.bfd_is_abs_section (const asection *sec)
+.{
+. return sec == bfd_abs_section_ptr;
+.}
+.
+.static inline bfd_boolean
+.bfd_is_ind_section (const asection *sec)
+.{
+. return sec == bfd_ind_section_ptr;
+.}
+.
+.static inline bfd_boolean
+.bfd_is_const_section (const asection *sec)
+.{
+. return (sec >= _bfd_std_section
+. && sec < _bfd_std_section + (sizeof (_bfd_std_section)
+. / sizeof (_bfd_std_section[0])));
+.}
+.
+.{* Return TRUE if input section SEC has been discarded. *}
+.static inline bfd_boolean
+.discarded_section (const asection *sec)
+.{
+. return (!bfd_is_abs_section (sec)
+. && bfd_is_abs_section (sec->output_section)
+. && sec->sec_info_type != SEC_INFO_TYPE_MERGE
+. && sec->sec_info_type != SEC_INFO_TYPE_JUST_SYMS);
+.}
.
.#define BFD_FAKE_SECTION(SEC, SYM, NAME, IDX, FLAGS) \
-. {* name, id, index, next, prev, flags, user_set_vma, *} \
-. { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
+. {* name, id, section_id, index, next, prev, flags, user_set_vma, *} \
+. { NAME, IDX, 0, 0, NULL, NULL, FLAGS, 0, \
. \
-. {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \
+. {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \
. 0, 0, 1, 0, \
. \
-. {* segment_mark, sec_info_type, use_rela_p, *} \
+. {* segment_mark, sec_info_type, use_rela_p, *} \
. 0, 0, 0, \
. \
-. {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \
+. {* sec_flg0, sec_flg1, sec_flg2, sec_flg3, sec_flg4, sec_flg5, *} \
. 0, 0, 0, 0, 0, 0, \
. \
-. {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \
+. {* vma, lma, size, rawsize, compressed_size, relax, relax_count, *} \
. 0, 0, 0, 0, 0, 0, 0, \
. \
-. {* output_offset, output_section, alignment_power, *} \
+. {* output_offset, output_section, alignment_power, *} \
. 0, &SEC, 0, \
. \
-. {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \
+. {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \
. NULL, NULL, 0, 0, 0, \
. \
-. {* line_filepos, userdata, contents, lineno, lineno_count, *} \
+. {* line_filepos, userdata, contents, lineno, lineno_count, *} \
. 0, NULL, NULL, NULL, 0, \
. \
-. {* entsize, kept_section, moving_line_filepos, *} \
-. 0, NULL, 0, \
+. {* entsize, kept_section, moving_line_filepos, *} \
+. 0, NULL, 0, \
. \
-. {* target_index, used_by_bfd, constructor_chain, owner, *} \
+. {* target_index, used_by_bfd, constructor_chain, owner, *} \
. 0, NULL, NULL, NULL, \
. \
-. {* symbol, symbol_ptr_ptr, *} \
+. {* symbol, symbol_ptr_ptr, *} \
. (struct bfd_symbol *) SYM, &SEC.symbol, \
. \
-. {* map_head, map_tail *} \
-. { NULL }, { NULL } \
+. {* map_head, map_tail, already_assigned *} \
+. { NULL }, { NULL }, NULL \
+. \
. }
.
.{* We use a macro to initialize the static asymbol structures because
return TRUE;
}
-static unsigned int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
+unsigned int _bfd_section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
/* Initializes a new section. NEWSECT->NAME is already set. */
static asection *
bfd_section_init (bfd *abfd, asection *newsect)
{
- newsect->id = section_id;
+ newsect->id = _bfd_section_id;
newsect->index = abfd->section_count;
newsect->owner = abfd;
if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect)))
return NULL;
- section_id++;
+ _bfd_section_id++;
abfd->section_count++;
bfd_section_list_append (abfd, newsect);
return newsect;
return bfd_make_section_with_flags (abfd, name, 0);
}
-/*
-FUNCTION
- bfd_get_next_section_id
-
-SYNOPSIS
- int bfd_get_next_section_id (void);
-
-DESCRIPTION
- Returns the id that the next section created will have.
-*/
-
-int
-bfd_get_next_section_id (void)
-{
- return section_id;
-}
-
/*
FUNCTION
bfd_set_section_flags
SYNOPSIS
- bfd_boolean bfd_set_section_flags
- (bfd *abfd, asection *sec, flagword flags);
+ bfd_boolean bfd_set_section_flags (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:
+ Set the attributes of the section @var{sec} 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
*/
bfd_boolean
-bfd_set_section_flags (bfd *abfd ATTRIBUTE_UNUSED,
- sec_ptr section,
- flagword flags)
+bfd_set_section_flags (asection *section, flagword flags)
{
section->flags = flags;
return TRUE;
SYNOPSIS
void bfd_rename_section
- (bfd *abfd, asection *sec, const char *newname);
+ (asection *sec, const char *newname);
DESCRIPTION
- Rename section @var{sec} in @var{abfd} to @var{newname}.
+ Rename section @var{sec} to @var{newname}.
*/
void
-bfd_rename_section (bfd *abfd, sec_ptr sec, const char *newname)
+bfd_rename_section (asection *sec, const char *newname)
{
struct section_hash_entry *sh;
sh = (struct section_hash_entry *)
((char *) sec - offsetof (struct section_hash_entry, section));
sh->section.name = newname;
- bfd_hash_rename (&abfd->section_htab, newname, &sh->root);
+ bfd_hash_rename (&sec->owner->section_htab, newname, &sh->root);
}
/*
bfd_set_section_size
SYNOPSIS
- bfd_boolean bfd_set_section_size
- (bfd *abfd, asection *sec, bfd_size_type val);
+ bfd_boolean bfd_set_section_size (asection *sec, bfd_size_type val);
DESCRIPTION
Set @var{sec} to the size @var{val}. If the operation is
*/
bfd_boolean
-bfd_set_section_size (bfd *abfd, sec_ptr ptr, bfd_size_type val)
+bfd_set_section_size (asection *sec, 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)
+ if (sec->owner == NULL || sec->owner->output_has_begun)
{
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
}
- ptr->size = val;
+ sec->size = val;
return TRUE;
}
DESCRIPTION
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{abfd} to the data starting in memory at @var{location}.
+ The data is written to the output section starting at offset
@var{offset} for @var{count} octets.
- Normally <<TRUE>> is returned, else <<FALSE>>. Possible error
- returns are:
+ Normally <<TRUE>> is returned, but <<FALSE>> is returned if
+ there was an error. Possible error returns are:
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
+ o <<bfd_error_bad_value>> -
+ The section is unable to contain all of the data.
+ o <<bfd_error_invalid_operation>> -
+ The BFD is not writeable.
+ o and some more too.
This routine is front end to the back end function
<<_bfd_set_section_contents>>.
{
bfd_size_type sz;
- if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS))
+ if (!(bfd_section_flags (section) & SEC_HAS_CONTENTS))
{
bfd_set_error (bfd_error_no_contents);
return FALSE;
return FALSE;
}
+/*
+FUNCTION
+ bfd_generic_group_name
+
+SYNOPSIS
+ const char *bfd_generic_group_name (bfd *, const asection *sec);
+
+DESCRIPTION
+ Returns group name if @var{sec} is a member of a group.
+*/
+
+const char *
+bfd_generic_group_name (bfd *abfd ATTRIBUTE_UNUSED,
+ const asection *sec ATTRIBUTE_UNUSED)
+{
+ return NULL;
+}
+
/*
FUNCTION
bfd_generic_discard_group
{
return TRUE;
}
+
+bfd_boolean
+_bfd_nowrite_set_section_contents (bfd *abfd,
+ sec_ptr section ATTRIBUTE_UNUSED,
+ const void *location ATTRIBUTE_UNUSED,
+ file_ptr offset ATTRIBUTE_UNUSED,
+ bfd_size_type count ATTRIBUTE_UNUSED)
+{
+ return _bfd_bool_bfd_false_error (abfd);
+}
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