/* Object file "section" support for the BFD library.
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003
+ 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011,
+ 2012, 2013
Free Software Foundation, Inc.
Written by Cygnus Support.
-This file is part of BFD, the Binary File Descriptor library.
+ This file is part of BFD, the Binary File Descriptor library.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
/*
SECTION
*/
-#include "bfd.h"
#include "sysdep.h"
+#include "bfd.h"
#include "libbfd.h"
#include "bfdlink.h"
CODE_FRAGMENT
.
-.{* This structure is used for a comdat section, as in PE. A comdat
-. section is associated with a particular symbol. When the linker
-. sees a comdat section, it keeps only one of the sections with a
-. given name and associated with a given symbol. *}
-.
-.struct bfd_comdat_info
-.{
-. {* The name of the symbol associated with a comdat section. *}
-. const char *name;
-.
-. {* The local symbol table index of the symbol associated with a
-. comdat section. This is only meaningful to the object file format
-. specific code; it is not an index into the list returned by
-. bfd_canonicalize_symtab. *}
-. long symbol;
-.};
-.
.typedef struct bfd_section
.{
. {* The name of the section; the name isn't a copy, the pointer is
. {* 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 0xc0000
.
. {* 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 0x40000
.
. {* 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 0x80000
.
. {* 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 0x100000
.
-. {* This section should not be subject to garbage collection. *}
-.#define SEC_KEEP 0x1000000
+. {* 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. *}
+.#define SEC_KEEP 0x200000
.
. {* 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 0x400000
.
. {* Attempt to merge identical entities in the section.
. Entity size is given in the entsize field. *}
-.#define SEC_MERGE 0x20000000
+.#define SEC_MERGE 0x800000
.
. {* 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 0x1000000
.
. {* This section contains data about section groups. *}
-.#define SEC_GROUP 0x80000000
+.#define SEC_GROUP 0x2000000
+.
+. {* 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 0x4000000
+.
+. {* This input section should be copied to output in reverse order
+. as an array of pointers. This is for ELF linker internal use
+. only. *}
+.#define SEC_ELF_REVERSE_COPY 0x4000000
+.
+. {* This section contains data which may be shared with other
+. executables or shared objects. This is for COFF only. *}
+.#define SEC_COFF_SHARED 0x8000000
+.
+. {* 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 0x10000000
+.
+. {* 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 0x20000000
+.
+. {* Indicate that section has the no read flag set. This happens
+. when memory read flag isn't set. *}
+.#define SEC_COFF_NOREAD 0x40000000
.
. {* End of section flags. *}
.
. {* 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;
.
. output sections that have an input section. *}
. unsigned int linker_has_input : 1;
.
-. {* A mark flag used by some linker backends for garbage collection. *}
+. {* Mark flag used by some linker backends for garbage collection. *}
. unsigned int gc_mark : 1;
.
+. {* Section compression status. *}
+. unsigned int compress_status : 2;
+.#define COMPRESS_SECTION_NONE 0
+.#define COMPRESS_SECTION_DONE 1
+.#define DECOMPRESS_SECTION_SIZED 2
+.
. {* The following flags are used by the ELF linker. *}
.
. {* Mark sections which have been allocated to segments. *}
.
. {* 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
+.#define SEC_INFO_TYPE_NONE 0
+.#define SEC_INFO_TYPE_STABS 1
+.#define SEC_INFO_TYPE_MERGE 2
+.#define SEC_INFO_TYPE_EH_FRAME 3
+.#define SEC_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;
+. {* Bits used by various backends. The generic code doesn't touch
+. these fields. *}
.
-. {* Nonzero if this section has a gp reloc. *}
-. unsigned int has_gp_reloc:1;
-.
-. {* Unused 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;
+. unsigned int sec_flg0:1;
+. unsigned int sec_flg1:1;
+. unsigned int sec_flg2:1;
+. unsigned int sec_flg3:1;
+. unsigned int sec_flg4:1;
+. unsigned int sec_flg5:1;
.
. {* End of internal packed boolean fields. *}
.
.
. {* The size of the section in octets, as it will be output.
. 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;
+. size of <<.bss>>). *}
+. bfd_size_type size;
+.
+. {* For input sections, the original size on disk of the section, in
+. octets. This field should be set for any section whose size is
+. changed by linker relaxation. It is required for sections where
+. the linker relaxation scheme doesn't cache altered section and
+. reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing
+. targets), and thus the original size needs to be kept to read the
+. section multiple times. For output sections, rawsize holds the
+. section size calculated on a previous linker relaxation pass. *}
+. bfd_size_type rawsize;
+.
+. {* The compressed size of the section in octets. *}
+. bfd_size_type compressed_size;
+.
+. {* Relaxation table. *}
+. struct relax_table *relax;
+.
+. {* Count of used relaxation table entries. *}
+. int relax_count;
.
-. {* The original size on disk of the section, in octets. 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;
.
. {* If this section is going to be output, then this value is the
. offset in *bytes* into the output section of the first byte in the
. {* Entity size for merging purposes. *}
. unsigned int entsize;
.
-. {* 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 bfd_section *kept_section;
. struct bfd_symbol *symbol;
. struct bfd_symbol **symbol_ptr_ptr;
.
-. struct bfd_link_order *link_order_head;
-. struct bfd_link_order *link_order_tail;
+. {* 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. *}
+. union {
+. struct bfd_link_order *link_order;
+. struct bfd_section *s;
+. } map_head, map_tail;
.} asection;
.
+.{* Relax table contains information about instructions which can
+. be removed by relaxation -- replacing a long address with a
+. short address. *}
+.struct relax_table {
+. {* Address where bytes may be deleted. *}
+. bfd_vma addr;
+.
+. {* Number of bytes to be deleted. *}
+. int size;
+.};
+.
.{* 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. New code should use the section_ptr macros rather
-. than referring directly to the const sections. The const sections
-. may eventually vanish. *}
+. these sections. *}
+.extern asection _bfd_std_section[4];
+.
.#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;
-.#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;
-.#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;
-.#define bfd_com_section_ptr ((asection *) &bfd_com_section)
+.#define bfd_com_section_ptr (&_bfd_std_section[0])
+.{* Pointer to the undefined section. *}
+.#define bfd_und_section_ptr (&_bfd_std_section[1])
+.{* Pointer to the absolute section. *}
+.#define bfd_abs_section_ptr (&_bfd_std_section[2])
.{* Pointer to the indirect section. *}
-.extern asection bfd_ind_section;
-.#define bfd_ind_section_ptr ((asection *) &bfd_ind_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_com_section_ptr) \
. || ((SEC) == bfd_ind_section_ptr))
.
-.extern const struct bfd_symbol * const bfd_abs_symbol;
-.extern const struct bfd_symbol * const bfd_com_symbol;
-.extern const struct bfd_symbol * const bfd_und_symbol;
-.extern const struct bfd_symbol * const bfd_ind_symbol;
-.#define bfd_get_section_size_before_reloc(section) \
-. ((section)->_raw_size)
-.#define bfd_get_section_size_after_reloc(section) \
-. ((section)->reloc_done ? (section)->_cooked_size \
-. : (abort (), (bfd_size_type) 1))
-.
.{* 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 *_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 **_ps = PS; \
-. asection *_s = *_ps; \
-. *_ps = _s->next; \
-. if (_s->next == NULL) \
-. (ABFD)->section_tail = _ps; \
+. 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(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 ? (ABFD)->section_last != (S) : (S)->next->prev != (S))
+.
+.#define BFD_FAKE_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
+. {* name, id, index, next, prev, flags, user_set_vma, *} \
+. { NAME, IDX, 0, NULL, NULL, FLAGS, 0, \
+. \
+. {* linker_mark, linker_has_input, gc_mark, decompress_status, *} \
+. 0, 0, 1, 0, \
+. \
+. {* segment_mark, sec_info_type, use_rela_p, *} \
+. 0, 0, 0, \
+. \
+. {* 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, *} \
+. 0, 0, 0, 0, 0, 0, 0, \
+. \
+. {* output_offset, output_section, alignment_power, *} \
+. 0, &SEC, 0, \
+. \
+. {* relocation, orelocation, reloc_count, filepos, rel_filepos, *} \
+. NULL, NULL, 0, 0, 0, \
+. \
+. {* line_filepos, userdata, contents, lineno, lineno_count, *} \
+. 0, NULL, NULL, NULL, 0, \
+. \
+. {* entsize, kept_section, moving_line_filepos, *} \
+. 0, NULL, 0, \
+. \
+. {* target_index, used_by_bfd, constructor_chain, owner, *} \
+. 0, NULL, NULL, NULL, \
+. \
+. {* symbol, symbol_ptr_ptr, *} \
+. (struct bfd_symbol *) SYM, &SEC.symbol, \
+. \
+. {* map_head, map_tail *} \
+. { NULL }, { NULL } \
+. }
.
*/
/* the_bfd, name, value, attr, section [, udata] */
#ifdef __STDC__
#define GLOBAL_SYM_INIT(NAME, SECTION) \
- { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION, { 0 }}
+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION, { 0 }}
#else
#define GLOBAL_SYM_INIT(NAME, SECTION) \
- { 0, NAME, 0, BSF_SECTION_SYM, (asection *) SECTION }
+ { 0, NAME, 0, BSF_SECTION_SYM, SECTION }
#endif
/* These symbols are global, not specific to any BFD. Therefore, anything
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)
+ GLOBAL_SYM_INIT (BFD_COM_SECTION_NAME, bfd_com_section_ptr),
+ GLOBAL_SYM_INIT (BFD_UND_SECTION_NAME, bfd_und_section_ptr),
+ GLOBAL_SYM_INIT (BFD_ABS_SECTION_NAME, bfd_abs_section_ptr),
+ GLOBAL_SYM_INIT (BFD_IND_SECTION_NAME, bfd_ind_section_ptr)
};
-#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, 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, \
- \
- /* output_offset, output_section, alignment_power, */ \
- 0, (struct bfd_section *) &SEC, 0, \
- \
- /* relocation, orelocation, reloc_count, filepos, rel_filepos, */ \
- NULL, NULL, 0, 0, 0, \
- \
- /* line_filepos, userdata, contents, lineno, lineno_count, */ \
- 0, NULL, NULL, 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, \
- \
- /* symbol, */ \
- (struct bfd_symbol *) &global_syms[IDX], \
- \
- /* symbol_ptr_ptr, */ \
- (struct bfd_symbol **) &SYM, \
- \
- /* link_order_head, link_order_tail */ \
- NULL, NULL \
- }
+#define STD_SECTION(NAME, IDX, FLAGS) \
+ BFD_FAKE_SECTION(_bfd_std_section[IDX], FLAGS, &global_syms[IDX], NAME, IDX)
-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);
-#undef STD_SECTION
-
-struct section_hash_entry
-{
- struct bfd_hash_entry root;
- asection section;
+asection _bfd_std_section[] = {
+ STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON),
+ STD_SECTION (BFD_UND_SECTION_NAME, 1, 0),
+ STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0),
+ STD_SECTION (BFD_IND_SECTION_NAME, 3, 0)
};
+#undef STD_SECTION
/* Initialize an entry in the section hash table. */
((struct section_hash_entry *) \
bfd_hash_lookup ((table), (string), (create), (copy)))
-/* Initializes a new section. NEWSECT->NAME is already set. */
+/* Create a symbol whose only job is to point to this section. This
+ is useful for things like relocs which are relative to the base
+ of a section. */
-static asection *
-bfd_section_init (bfd *abfd, asection *newsect)
+bfd_boolean
+_bfd_generic_new_section_hook (bfd *abfd, asection *newsect)
{
- static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
-
- newsect->id = section_id;
- newsect->index = abfd->section_count;
- newsect->owner = abfd;
-
- /* Create a symbol whose 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);
if (newsect->symbol == NULL)
- return NULL;
+ return FALSE;
newsect->symbol->name = newsect->name;
newsect->symbol->value = 0;
newsect->symbol->flags = BSF_SECTION_SYM;
newsect->symbol_ptr_ptr = &newsect->symbol;
+ return TRUE;
+}
+
+/* Initializes a new section. NEWSECT->NAME is already set. */
+
+static asection *
+bfd_section_init (bfd *abfd, asection *newsect)
+{
+ static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
+
+ newsect->id = section_id;
+ newsect->index = abfd->section_count;
+ newsect->owner = abfd;
if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect)))
return NULL;
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 *));
+ abfd->section_htab.count = 0;
}
/*
asection *bfd_get_section_by_name (bfd *abfd, const char *name);
DESCRIPTION
- 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
- or something else) for each section.
+ Return the most recently created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
*/
asection *
return NULL;
}
+/*
+FUNCTION
+ bfd_get_next_section_by_name
+
+SYNOPSIS
+ asection *bfd_get_next_section_by_name (asection *sec);
+
+DESCRIPTION
+ Given @var{sec} is a section returned by @code{bfd_get_section_by_name},
+ return the next most recently created section attached to the same
+ BFD with the same name. Return NULL if no such section exists.
+*/
+
+asection *
+bfd_get_next_section_by_name (asection *sec)
+{
+ struct section_hash_entry *sh;
+ const char *name;
+ unsigned long hash;
+
+ sh = ((struct section_hash_entry *)
+ ((char *) sec - offsetof (struct section_hash_entry, section)));
+
+ hash = sh->root.hash;
+ name = sec->name;
+ for (sh = (struct section_hash_entry *) sh->root.next;
+ sh != NULL;
+ sh = (struct section_hash_entry *) sh->root.next)
+ if (sh->root.hash == hash
+ && strcmp (sh->root.string, name) == 0)
+ return &sh->section;
+
+ return NULL;
+}
+
+/*
+FUNCTION
+ bfd_get_linker_section
+
+SYNOPSIS
+ asection *bfd_get_linker_section (bfd *abfd, const char *name);
+
+DESCRIPTION
+ Return the linker created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
+*/
+
+asection *
+bfd_get_linker_section (bfd *abfd, const char *name)
+{
+ asection *sec = bfd_get_section_by_name (abfd, name);
+
+ while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0)
+ sec = bfd_get_next_section_by_name (sec);
+ return sec;
+}
+
+/*
+FUNCTION
+ bfd_get_section_by_name_if
+
+SYNOPSIS
+ asection *bfd_get_section_by_name_if
+ (bfd *abfd,
+ const char *name,
+ bfd_boolean (*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} whose name matches @var{name},
+ passing @var{obj} as an argument. The function will be called
+ as if by
+
+| func (abfd, the_section, obj);
+
+ It returns the first section for which @var{func} returns true,
+ otherwise <<NULL>>.
+
+*/
+
+asection *
+bfd_get_section_by_name_if (bfd *abfd, const char *name,
+ bfd_boolean (*operation) (bfd *,
+ asection *,
+ void *),
+ void *user_storage)
+{
+ struct section_hash_entry *sh;
+ unsigned long hash;
+
+ sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);
+ if (sh == NULL)
+ return NULL;
+
+ hash = sh->root.hash;
+ do
+ {
+ if ((*operation) (abfd, &sh->section, user_storage))
+ return &sh->section;
+ sh = (struct section_hash_entry *) sh->root.next;
+ }
+ while (sh != NULL && sh->root.hash == hash
+ && strcmp (sh->root.string, name) == 0);
+
+ return NULL;
+}
+
/*
FUNCTION
bfd_get_unique_section_name
char *sname;
len = strlen (templat);
- sname = bfd_malloc (len + 8);
+ sname = (char *) bfd_malloc (len + 8);
if (sname == NULL)
return NULL;
memcpy (sname, templat, len);
asection *
bfd_make_section_old_way (bfd *abfd, const char *name)
{
- struct section_hash_entry *sh;
asection *newsect;
if (abfd->output_has_begun)
}
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;
+ newsect = bfd_abs_section_ptr;
+ else if (strcmp (name, BFD_COM_SECTION_NAME) == 0)
+ newsect = bfd_com_section_ptr;
+ else if (strcmp (name, BFD_UND_SECTION_NAME) == 0)
+ newsect = bfd_und_section_ptr;
+ else if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
+ newsect = bfd_ind_section_ptr;
+ else
+ {
+ struct section_hash_entry *sh;
- if (strcmp (name, BFD_IND_SECTION_NAME) == 0)
- return bfd_ind_section_ptr;
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
+ return NULL;
- sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
- if (sh == NULL)
- return NULL;
+ newsect = &sh->section;
+ if (newsect->name != NULL)
+ {
+ /* Section already exists. */
+ return newsect;
+ }
- newsect = &sh->section;
- if (newsect->name != NULL)
- {
- /* Section already exists. */
- return newsect;
+ newsect->name = name;
+ return bfd_section_init (abfd, newsect);
}
- newsect->name = name;
- return bfd_section_init (abfd, newsect);
+ /* Call new_section_hook when "creating" the standard abs, com, und
+ and ind sections to tack on format specific section data.
+ Also, create a proper section symbol. */
+ if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect)))
+ return NULL;
+ return newsect;
}
/*
FUNCTION
- bfd_make_section_anyway
+ bfd_make_section_anyway_with_flags
SYNOPSIS
- asection *bfd_make_section_anyway (bfd *abfd, const char *name);
+ asection *bfd_make_section_anyway_with_flags
+ (bfd *abfd, const char *name, flagword flags);
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. Also set the attributes of the
+ new section to the value @var{flags}.
Return <<NULL>> and set <<bfd_error>> on error; possible errors are:
o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}.
*/
sec_ptr
-bfd_make_section_anyway (bfd *abfd, const char *name)
+bfd_make_section_anyway_with_flags (bfd *abfd, const char *name,
+ flagword flags)
{
struct section_hash_entry *sh;
asection *newsect;
newsect = &sh->section;
if (newsect->name != NULL)
{
- /* We are making a section of the same name. It can't go in
- section_htab without generating a unique section name and
- that would be pointless; We don't need to traverse the
- hash table. */
- newsect = bfd_zalloc (abfd, sizeof (asection));
- if (newsect == NULL)
+ /* We are making a section of the same name. Put it in the
+ section hash table. Even though we can't find it directly by a
+ hash lookup, we'll be able to find the section by traversing
+ sh->root.next quicker than looking at all the bfd sections. */
+ struct section_hash_entry *new_sh;
+ new_sh = (struct section_hash_entry *)
+ bfd_section_hash_newfunc (NULL, &abfd->section_htab, name);
+ if (new_sh == NULL)
return NULL;
+
+ new_sh->root = sh->root;
+ sh->root.next = &new_sh->root;
+ newsect = &new_sh->section;
}
+ newsect->flags = flags;
newsect->name = name;
return bfd_section_init (abfd, newsect);
}
/*
FUNCTION
- bfd_make_section
+ bfd_make_section_anyway
SYNOPSIS
- asection *bfd_make_section (bfd *, 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
+ the chain of sections for @var{abfd}. Create a new section even if there
+ is already a section with that name.
+
+ 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
+bfd_make_section_anyway (bfd *abfd, const char *name)
+{
+ return bfd_make_section_anyway_with_flags (abfd, name, 0);
+}
+
+/*
+FUNCTION
+ bfd_make_section_with_flags
+
+SYNOPSIS
+ asection *bfd_make_section_with_flags
+ (bfd *, const char *name, flagword flags);
DESCRIPTION
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
+ section named @var{name}. Also set the attributes of the new section to
+ the value @var{flags}. If there is an error, return <<NULL>> and set
<<bfd_error>>.
*/
asection *
-bfd_make_section (bfd *abfd, const char *name)
+bfd_make_section_with_flags (bfd *abfd, const char *name,
+ flagword flags)
{
struct section_hash_entry *sh;
asection *newsect;
}
newsect->name = name;
+ newsect->flags = flags;
return bfd_section_init (abfd, newsect);
}
+/*
+FUNCTION
+ bfd_make_section
+
+SYNOPSIS
+ asection *bfd_make_section (bfd *, const char *name);
+
+DESCRIPTION
+ 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>>.
+*/
+
+asection *
+bfd_make_section (bfd *abfd, const char *name)
+{
+ return bfd_make_section_with_flags (abfd, name, 0);
+}
+
/*
FUNCTION
bfd_set_section_flags
*/
-/*ARGSUSED*/
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
- has the SEC_CODE flag set) to an output file, this loses big if
- 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_set_error (bfd_error_invalid_operation);
- return FALSE;
- }
-#endif
-
section->flags = flags;
return TRUE;
}
+/*
+FUNCTION
+ bfd_rename_section
+
+SYNOPSIS
+ void bfd_rename_section
+ (bfd *abfd, asection *sec, const char *newname);
+
+DESCRIPTION
+ Rename section @var{sec} in @var{abfd} to @var{newname}.
+*/
+
+void
+bfd_rename_section (bfd *abfd, sec_ptr 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);
+}
+
/*
FUNCTION
bfd_map_over_sections
| func (abfd, the_section, obj);
- This is the prefered method for iterating over sections; an
+ This is the preferred method for iterating over sections; an
alternative would be to use a loop:
-| section *p;
+| asection *p;
| for (p = abfd->sections; p != NULL; p = p->next)
| func (abfd, p, ...)
*/
-/*VARARGS2*/
void
bfd_map_over_sections (bfd *abfd,
void (*operation) (bfd *, asection *, void *),
abort ();
}
+/*
+FUNCTION
+ bfd_sections_find_if
+
+SYNOPSIS
+ asection *bfd_sections_find_if
+ (bfd *abfd,
+ bfd_boolean (*operation) (bfd *abfd, asection *sect, void *obj),
+ void *obj);
+
+DESCRIPTION
+ Call the provided function @var{operation} for each section
+ attached to the BFD @var{abfd}, passing @var{obj} as an
+ argument. The function will be called as if by
+
+| operation (abfd, the_section, obj);
+
+ It returns the first section for which @var{operation} returns true.
+
+*/
+
+asection *
+bfd_sections_find_if (bfd *abfd,
+ bfd_boolean (*operation) (bfd *, asection *, void *),
+ void *user_storage)
+{
+ asection *sect;
+
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ if ((*operation) (abfd, sect, user_storage))
+ break;
+
+ return sect;
+}
+
/*
FUNCTION
bfd_set_section_size
return FALSE;
}
- ptr->_cooked_size = val;
- ptr->_raw_size = val;
-
+ ptr->size = val;
return TRUE;
}
SYNOPSIS
bfd_boolean bfd_set_section_contents
- (bfd *abfd, asection *section, void *data, file_ptr offset,
- bfd_size_type count);
+ (bfd *abfd, asection *section, const void *data,
+ file_ptr offset, bfd_size_type count);
DESCRIPTION
Sets the contents of the section @var{section} in BFD
*/
-#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,
+ const void *location,
file_ptr offset,
bfd_size_type count)
{
return FALSE;
}
- sz = bfd_get_section_size_now (abfd, section);
+ sz = section->size;
if ((bfd_size_type) offset > sz
|| count > sz
|| offset + count > sz
return FALSE;
}
- switch (abfd->direction)
+ if (!bfd_write_p (abfd))
{
- case read_direction:
- case no_direction:
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
-
- case write_direction:
- break;
-
- 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;
}
/* Record a copy of the data in memory if desired. */
return TRUE;
}
- /* Even if reloc_done is TRUE, this function reads unrelocated
- contents, so we want the raw size. */
- sz = section->_raw_size;
+ if (abfd->direction != write_direction && section->rawsize != 0)
+ sz = section->rawsize;
+ else
+ sz = section->size;
if ((bfd_size_type) offset > sz
|| count > sz
|| offset + count > sz
if ((section->flags & SEC_IN_MEMORY) != 0)
{
- memcpy (location, section->contents + offset, (size_t) count);
+ if (section->contents == NULL)
+ {
+ /* This can happen because of errors earlier on in the linking process.
+ We do not want to seg-fault here, so clear the flag and return an
+ error code. */
+ section->flags &= ~ SEC_IN_MEMORY;
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+ }
+
+ memmove (location, section->contents + offset, (size_t) count);
return TRUE;
}
(abfd, section, location, offset, count));
}
+/*
+FUNCTION
+ bfd_malloc_and_get_section
+
+SYNOPSIS
+ bfd_boolean bfd_malloc_and_get_section
+ (bfd *abfd, asection *section, bfd_byte **buf);
+
+DESCRIPTION
+ Read all data from @var{section} in BFD @var{abfd}
+ into a buffer, *@var{buf}, malloc'd by this function.
+*/
+
+bfd_boolean
+bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf)
+{
+ *buf = NULL;
+ return bfd_get_full_section_contents (abfd, sec, buf);
+}
/*
FUNCTION
bfd_copy_private_section_data
/*
FUNCTION
- _bfd_strip_section_from_output
+ bfd_generic_is_group_section
SYNOPSIS
- void _bfd_strip_section_from_output
- (struct bfd_link_info *info, asection *section);
+ bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec);
DESCRIPTION
- Remove @var{section} from the output. If the output section
- 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.
+ Returns TRUE if @var{sec} is a member of a group.
*/
-void
-_bfd_strip_section_from_output (struct bfd_link_info *info, asection *s)
+
+bfd_boolean
+bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED,
+ const asection *sec ATTRIBUTE_UNUSED)
{
- asection *os;
- asection *is;
- bfd *abfd;
-
- s->flags |= SEC_EXCLUDE;
-
- /* 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;
- if (os == NULL || os->owner == NULL)
- return;
-
- /* 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;
-
- /* 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;
+ return FALSE;
}
/*