/* Object file "section" support for the BFD library.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003, 2004
+ 2000, 2001, 2002, 2003, 2004, 2005
Free Software Foundation, Inc.
Written by Cygnus Support.
. {* The next section in the list belonging to the BFD, or NULL. *}
. struct bfd_section *next;
.
+. {* The previous section in the list belonging to the BFD, or NULL. *}
+. struct bfd_section *prev;
+.
. {* The field flags contains attributes of the section. Some
. flags are read in from the object file, and some are
. synthesized from other information. *}
. some relocation information too. *}
.#define SEC_RELOC 0x004
.
-. {* ELF reserves 4 processor specific bits and 8 operating system
-. specific bits in sh_flags; at present we can get away with just
-. one in communicating between the assembler and BFD, but this
-. isn't a good long-term solution. *}
-.#define SEC_ARCH_BIT_0 0x008
-.
. {* A signal to the OS that the section contains read only data. *}
-.#define SEC_READONLY 0x010
+.#define SEC_READONLY 0x008
.
. {* The section contains code only. *}
-.#define SEC_CODE 0x020
+.#define SEC_CODE 0x010
.
. {* The section contains data only. *}
-.#define SEC_DATA 0x040
+.#define SEC_DATA 0x020
.
. {* The section will reside in ROM. *}
-.#define SEC_ROM 0x080
+.#define SEC_ROM 0x040
.
. {* The section contains constructor information. This section
. type is used by the linker to create lists of constructors and
. sections called <<__CTOR_LIST__>> and relocate the data
. contained within - exactly the operations it would peform on
. standard data. *}
-.#define SEC_CONSTRUCTOR 0x100
+.#define SEC_CONSTRUCTOR 0x080
.
. {* The section has contents - a data section could be
. <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be
. <<SEC_HAS_CONTENTS>> *}
-.#define SEC_HAS_CONTENTS 0x200
+.#define SEC_HAS_CONTENTS 0x100
.
. {* An instruction to the linker to not output the section
. even if it has information which would normally be written. *}
-.#define SEC_NEVER_LOAD 0x400
-.
-. {* 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
+.#define SEC_NEVER_LOAD 0x200
.
. {* The section contains thread local data. *}
-.#define SEC_THREAD_LOCAL 0x1000
+.#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.
. 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 0x4000
+.#define SEC_HAS_GOT_REF 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_ptr), but ECOFF has two. *}
-.#define SEC_IS_COMMON 0x8000
+.#define SEC_IS_COMMON 0x1000
.
. {* The section contains only debugging information. For
. example, this is set for ELF .debug and .stab sections.
. strip tests this flag to see if a section can be
. discarded. *}
-.#define SEC_DEBUGGING 0x10000
+.#define SEC_DEBUGGING 0x2000
.
. {* 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
+.#define SEC_IN_MEMORY 0x4000
.
. {* 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
+.#define SEC_EXCLUDE 0x8000
.
. {* The contents of this section are to be sorted based on the sum of
. the symbol and addend values specified by the associated relocation
. entries. Entries without associated relocation entries will be
. appended to the end of the section in an unspecified order. *}
-.#define SEC_SORT_ENTRIES 0x80000
+.#define SEC_SORT_ENTRIES 0x10000
.
. {* 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
+.#define SEC_LINK_ONCE 0x20000
.
. {* If SEC_LINK_ONCE is set, this bitfield describes how the linker
. should handle duplicate sections. *}
-.#define SEC_LINK_DUPLICATES 0x600000
+.#define SEC_LINK_DUPLICATES 0x40000
.
. {* This value for SEC_LINK_DUPLICATES means that duplicate
. sections with the same name should simply be discarded. *}
. {* 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
+.#define SEC_LINK_DUPLICATES_ONE_ONLY 0x80000
.
. {* 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
+.#define SEC_LINK_DUPLICATES_SAME_SIZE 0x100000
.
. {* 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
+.#define SEC_LINK_DUPLICATES_SAME_CONTENTS \
+. (SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE)
.
. {* 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
+.#define SEC_LINKER_CREATED 0x200000
.
. {* This section should not be subject to garbage collection. *}
-.#define SEC_KEEP 0x1000000
+.#define SEC_KEEP 0x400000
.
. {* This section contains "short" data, and should be placed
. "near" the GP. *}
-.#define SEC_SMALL_DATA 0x2000000
-.
-. {* This section contains data which may be shared with other
-. executables or shared objects. *}
-.#define SEC_SHARED 0x4000000
-.
-. {* When a section with this flag is being linked, then if the size of
-. the input section is less than a page, it should not cross a page
-. boundary. If the size of the input section is one page or more, it
-. should be aligned on a page boundary. *}
-.#define SEC_BLOCK 0x8000000
-.
-. {* Conditionally link this section; do not link if there are no
-. references found to any symbol in the section. *}
-.#define SEC_CLINK 0x10000000
+.#define SEC_SMALL_DATA 0x800000
.
. {* Attempt to merge identical entities in the section.
. Entity size is given in the entsize field. *}
-.#define SEC_MERGE 0x20000000
+.#define SEC_MERGE 0x1000000
.
. {* If given with SEC_MERGE, entities to merge are zero terminated
. strings where entsize specifies character size instead of fixed
. size entries. *}
-.#define SEC_STRINGS 0x40000000
+.#define SEC_STRINGS 0x2000000
.
. {* This section contains data about section groups. *}
-.#define SEC_GROUP 0x80000000
+.#define SEC_GROUP 0x4000000
+.
+. {* 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 0x10000000
+.
+. {* This section contains data which may be shared with other
+. executables or shared objects. This is for COFF only. *}
+.#define SEC_COFF_SHARED 0x20000000
+.
+. {* When a section with this flag is being linked, then if the size of
+. the input section is less than a page, it should not cross a page
+. boundary. If the size of the input section is one page or more,
+. it should be aligned on a page boundary. This is for TI
+. TMS320C54X only. *}
+.#define SEC_TIC54X_BLOCK 0x40000000
+.
+. {* Conditionally link this section; do not link if there are no
+. references found to any symbol in the section. This is for TI
+. TMS320C54X only. *}
+.#define SEC_TIC54X_CLINK 0x80000000
.
. {* End of section flags. *}
.
.{* 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, PS) \
+.#define bfd_section_list_remove(ABFD, S) \
. do \
. { \
-. asection **_ps = PS; \
-. asection *_s = *_ps; \
-. *_ps = _s->next; \
-. if (_s->next == NULL) \
-. (ABFD)->section_tail = _ps; \
+. 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; \
+. _s->next = NULL; \
+. } \
+. 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 \
+. _abfd->sections = _s; \
+. _abfd->section_last = _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) \
+. _s->next->prev = _s; \
+. else \
+. (ABFD)->section_last = _s; \
. } \
. while (0)
-.#define bfd_section_list_insert(ABFD, PS, S) \
+.#define bfd_section_list_insert_before(ABFD, B, S) \
. do \
. { \
-. asection **_ps = PS; \
+. asection *_b = B; \
. asection *_s = S; \
-. _s->next = *_ps; \
-. *_ps = _s; \
-. if (_s->next == NULL) \
-. (ABFD)->section_tail = &_s->next; \
+. 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 && (S) != (ABFD)->section_last)
.
*/
#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \
asection SEC = \
- /* name, id, index, next, flags, user_set_vma, */ \
- { NAME, IDX, 0, NULL, FLAGS, 0, \
+ /* name, id, index, next, prev, flags, user_set_vma, */ \
+ { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
\
/* linker_mark, linker_has_input, gc_mark, segment_mark, */ \
0, 0, 1, 0, \
section_id++;
abfd->section_count++;
- *abfd->section_tail = newsect;
- abfd->section_tail = &newsect->next;
+ bfd_section_list_append (abfd, newsect);
return newsect;
}
bfd_section_list_clear (bfd *abfd)
{
abfd->sections = NULL;
- abfd->section_tail = &abfd->sections;
+ abfd->section_last = NULL;
abfd->section_count = 0;
memset (abfd->section_htab.table, 0,
abfd->section_htab.size * sizeof (struct bfd_hash_entry *));
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