X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Fsection.c;h=17f5b4c3d83f10f548c6366d05df3722f3c8a369;hb=refs%2Fheads%2Fconcurrent-displaced-stepping-2020-04-01;hp=4e46a5db330aa26a6afad4c5400b2dec3c57507f;hpb=3496cb2af49b7fdc1ea5a085b87e1a6c0b26aea4;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/section.c b/bfd/section.c index 4e46a5db33..17f5b4c3d8 100644 --- a/bfd/section.c +++ b/bfd/section.c @@ -1,24 +1,23 @@ /* Object file "section" support for the BFD library. - Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, - 2000, 2001, 2002, 2003, 2004, 2005 - 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. + 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 @@ -66,10 +65,7 @@ SUBSECTION data in place until a <> 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 @@ -133,8 +129,8 @@ SUBSECTION */ -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "bfdlink.h" @@ -156,10 +152,14 @@ CODE_FRAGMENT . const char *name; . . {* A unique sequence number. *} -. int id; +. 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. *} -. int index; +. unsigned int index; . . {* The next section in the list belonging to the BFD, or NULL. *} . struct bfd_section *next; @@ -172,31 +172,31 @@ CODE_FRAGMENT . synthesized from other information. *} . flagword flags; . -.#define SEC_NO_FLAGS 0x000 +.#define SEC_NO_FLAGS 0x0 . . {* Tells the OS to allocate space for this section when loading. . This is clear for a section containing debug information only. *} -.#define SEC_ALLOC 0x001 +.#define SEC_ALLOC 0x1 . . {* Tells the OS to load the section from the file when loading. . This is clear for a .bss section. *} -.#define SEC_LOAD 0x002 +.#define SEC_LOAD 0x2 . . {* The section contains data still to be relocated, so there is . some relocation information too. *} -.#define SEC_RELOC 0x004 +.#define SEC_RELOC 0x4 . . {* A signal to the OS that the section contains read only data. *} -.#define SEC_READONLY 0x008 +.#define SEC_READONLY 0x8 . . {* The section contains code only. *} -.#define SEC_CODE 0x010 +.#define SEC_CODE 0x10 . . {* The section contains data only. *} -.#define SEC_DATA 0x020 +.#define SEC_DATA 0x20 . . {* The section will reside in ROM. *} -.#define SEC_ROM 0x040 +.#define SEC_ROM 0x40 . . {* The section contains constructor information. This section . type is used by the linker to create lists of constructors and @@ -208,79 +208,76 @@ CODE_FRAGMENT . sections called <<__CTOR_LIST__>> and relocate the data . contained within - exactly the operations it would peform on . standard data. *} -.#define SEC_CONSTRUCTOR 0x080 +.#define SEC_CONSTRUCTOR 0x80 . . {* The section has contents - a data section could be . <> | <>; a debug section could be . <> *} -.#define SEC_HAS_CONTENTS 0x100 +.#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 0x200 +.#define SEC_NEVER_LOAD 0x200 . . {* The section contains thread local data. *} -.#define SEC_THREAD_LOCAL 0x400 +.#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 . 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 0x1000 +.#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 0x2000 +.#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 0x4000 +.#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 0x8000 +.#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 0x10000 +.#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 0x20000 +.#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 0x40000 +.#define SEC_LINK_DUPLICATES 0xc0000 . . {* This value for SEC_LINK_DUPLICATES means that duplicate . sections with the same name should simply be discarded. *} -.#define SEC_LINK_DUPLICATES_DISCARD 0x0 +.#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 0x80000 +.#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 0x100000 +.#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 @@ -292,26 +289,32 @@ CODE_FRAGMENT . 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 0x200000 +.#define SEC_LINKER_CREATED 0x100000 . -. {* This section should not be subject to garbage collection. *} -.#define SEC_KEEP 0x400000 +. {* 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. *} +.#define SEC_KEEP 0x200000 . . {* This section contains "short" data, and should be placed . "near" the GP. *} -.#define SEC_SMALL_DATA 0x800000 +.#define SEC_SMALL_DATA 0x400000 . . {* Attempt to merge identical entities in the section. . Entity size is given in the entsize field. *} -.#define SEC_MERGE 0x1000000 +.#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 0x2000000 +.#define SEC_STRINGS 0x1000000 . . {* This section contains data about section groups. *} -.#define SEC_GROUP 0x4000000 +.#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 @@ -322,23 +325,51 @@ CODE_FRAGMENT . 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 +.#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 0x20000000 +.#define SEC_COFF_SHARED 0x8000000 +. +. {* This section should be compressed. This is for ELF linker +. internal use only. *} +.#define SEC_ELF_COMPRESS 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 0x40000000 +.#define SEC_TIC54X_BLOCK 0x10000000 +. +. {* This section should be renamed. This is for ELF linker +. internal use only. *} +.#define SEC_ELF_RENAME 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 0x80000000 +.#define SEC_TIC54X_CLINK 0x20000000 +. +. {* 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 +. +. {* Indicate that section has the purecode flag set. *} +.#define SEC_ELF_PURECODE 0x80000000 . . {* End of section flags. *} . @@ -354,9 +385,15 @@ CODE_FRAGMENT . 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. *} @@ -364,11 +401,13 @@ CODE_FRAGMENT . . {* 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 +.#define SEC_INFO_TYPE_TARGET 5 +.#define SEC_INFO_TYPE_EH_FRAME_ENTRY 6 . . {* Nonzero if this section uses RELA relocations, rather than REL. *} . unsigned int use_rela_p:1; @@ -376,17 +415,12 @@ CODE_FRAGMENT . {* Bits used by various backends. The generic code doesn't touch . these fields. *} . -. {* Nonzero if this section has TLS related relocations. *} -. unsigned int has_tls_reloc:1; -. -. {* Nonzero if this section has a gp reloc. *} -. unsigned int has_gp_reloc:1; -. -. {* Nonzero if this section needs the relax finalize pass. *} -. unsigned int need_finalize_relax:1; -. -. {* Whether relocations have been processed. *} -. unsigned int reloc_done : 1; +. 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. *} . @@ -403,21 +437,31 @@ CODE_FRAGMENT . information. *} . bfd_vma lma; . -. {* The size of the section in octets, as it will be output. +. {* 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>>). *} . bfd_size_type size; . . {* For input sections, the original size on disk of the section, in -. octets. This field is used by the linker relaxation code. It is -. currently only set 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. *} +. 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; +. +. . {* 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 . input section (byte ==> smallest addressable unit on the @@ -500,220 +544,239 @@ CODE_FRAGMENT . {* 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 +. 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; +.}; +. +.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 (asection *sec, void *val) +.{ +. sec->userdata = val; +. return TRUE; +.} +. +.static inline bfd_boolean +.bfd_set_section_vma (asection *sec, bfd_vma val) +.{ +. sec->vma = sec->lma = val; +. sec->user_set_vma = TRUE; +. return TRUE; +.} +. +.static inline bfd_boolean +.bfd_set_section_lma (asection *sec, bfd_vma val) +.{ +. sec->lma = val; +. return TRUE; +.} +. +.static inline bfd_boolean +.bfd_set_section_alignment (asection *sec, unsigned int val) +.{ +. sec->alignment_power = val; +. return TRUE; +.} +. .{* 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_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)) -. -.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; -. -.{* 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)) +.#define bfd_ind_section_ptr (&_bfd_std_section[3]) +. +.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, 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, *} \ +. 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, already_assigned *} \ +. { NULL }, { NULL }, NULL \ +. \ +. } +. +.{* 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, SECTION, { 0 }} +.#else +.#define GLOBAL_SYM_INIT(NAME, SECTION) \ +. { 0, NAME, 0, BSF_SECTION_SYM, SECTION } +.#endif . */ -/* 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[] = { - 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, 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, \ - \ - /* sec_info_type, use_rela_p, has_tls_reloc, has_gp_reloc, */ \ - 0, 0, 0, 0, \ - \ - /* need_finalize_relax, reloc_done, */ \ - 0, 0, \ - \ - /* vma, lma, size, rawsize */ \ - 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, kept_section, moving_line_filepos, */ \ - 0, 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, \ - \ - /* map_head, map_tail */ \ - { NULL }, { NULL } \ - } +#define STD_SECTION(NAME, IDX, FLAGS) \ + BFD_FAKE_SECTION(_bfd_std_section[IDX], &global_syms[IDX], NAME, IDX, FLAGS) -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. */ @@ -745,23 +808,16 @@ bfd_section_hash_newfunc (struct bfd_hash_entry *entry, ((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; @@ -769,11 +825,24 @@ bfd_section_init (bfd *abfd, asection *newsect) newsect->symbol->flags = BSF_SECTION_SYM; newsect->symbol_ptr_ptr = &newsect->symbol; + return TRUE; +} + +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 = _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; @@ -809,6 +878,7 @@ bfd_section_list_clear (bfd *abfd) abfd->section_count = 0; memset (abfd->section_htab.table, 0, abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); + abfd->section_htab.count = 0; } /* @@ -819,14 +889,8 @@ SYNOPSIS asection *bfd_get_section_by_name (bfd *abfd, const char *name); DESCRIPTION - Run through @var{abfd} and return the one of the - <>s whose name matches @var{name}, otherwise <>. - @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 <> and - <> 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 * @@ -841,6 +905,75 @@ bfd_get_section_by_name (bfd *abfd, const char *name) return NULL; } +/* +FUNCTION + bfd_get_next_section_by_name + +SYNOPSIS + asection *bfd_get_next_section_by_name (bfd *ibfd, 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, or if no such section exists in the same BFD and + IBFD is non-NULL, the next section with the same name in any input + BFD following IBFD. Return NULL on finding no section. +*/ + +asection * +bfd_get_next_section_by_name (bfd *ibfd, 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; + + if (ibfd != NULL) + { + while ((ibfd = ibfd->link.next) != NULL) + { + asection *s = bfd_get_section_by_name (ibfd, name); + if (s != NULL) + return s; + } + } + + 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 (NULL, sec); + return sec; +} + /* FUNCTION bfd_get_section_by_name_if @@ -880,14 +1013,11 @@ bfd_get_section_by_name_if (bfd *abfd, const char *name, 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); + for (; sh != NULL; sh = (struct section_hash_entry *) sh->root.next) + if (sh->root.hash == hash + && strcmp (sh->root.string, name) == 0 + && (*operation) (abfd, &sh->section, user_storage)) + return &sh->section; return NULL; } @@ -916,7 +1046,7 @@ bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) 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); @@ -966,7 +1096,6 @@ DESCRIPTION asection * bfd_make_section_old_way (bfd *abfd, const char *name) { - struct section_hash_entry *sh; asection *newsect; if (abfd->output_has_begun) @@ -976,30 +1105,38 @@ bfd_make_section_old_way (bfd *abfd, const char *name) } 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; + 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_UND_SECTION_NAME) == 0) - return bfd_und_section_ptr; + sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); + if (sh == NULL) + return NULL; - if (strcmp (name, BFD_IND_SECTION_NAME) == 0) - return bfd_ind_section_ptr; + newsect = &sh->section; + if (newsect->name != NULL) + { + /* Section already exists. */ + return newsect; + } - 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->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; } /* @@ -1107,7 +1244,7 @@ bfd_make_section_with_flags (bfd *abfd, const char *name, struct section_hash_entry *sh; asection *newsect; - if (abfd->output_has_begun) + if (abfd == NULL || name == NULL || abfd->output_has_begun) { bfd_set_error (bfd_error_invalid_operation); return NULL; @@ -1160,13 +1297,12 @@ 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 <> on success, - <> on error. Possible error returns are: + Set the attributes of the section @var{sec} to the value @var{flags}. + Return <> on success, <> on error. Possible error + returns are: o <> - The section cannot have one or more of the attributes @@ -1176,14 +1312,35 @@ DESCRIPTION */ 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; } +/* +FUNCTION + bfd_rename_section + +SYNOPSIS + void bfd_rename_section + (asection *sec, const char *newname); + +DESCRIPTION + Rename section @var{sec} to @var{newname}. +*/ + +void +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 (&sec->owner->section_htab, newname, &sh->root); +} + /* FUNCTION bfd_map_over_sections @@ -1204,7 +1361,7 @@ DESCRIPTION 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, ...) @@ -1265,8 +1422,7 @@ FUNCTION 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 @@ -1279,18 +1435,18 @@ DESCRIPTION */ 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; } @@ -1305,16 +1461,20 @@ SYNOPSIS 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 <> is returned, else <>. Possible error - returns are: + Normally <> is returned, but <> is returned if + there was an error. Possible error returns are: o <> - The output section does not have the <> attribute, so nothing can be written to it. - o and some more too + o <> - + The section is unable to contain all of the data. + o <> - + The BFD is not writeable. + o and some more too. This routine is front end to the back end function <<_bfd_set_section_contents>>. @@ -1330,7 +1490,7 @@ bfd_set_section_contents (bfd *abfd, { 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; @@ -1346,22 +1506,10 @@ bfd_set_section_contents (bfd *abfd, 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. */ @@ -1416,7 +1564,10 @@ bfd_get_section_contents (bfd *abfd, return TRUE; } - sz = section->rawsize ? section->rawsize : section->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 @@ -1438,7 +1589,17 @@ bfd_get_section_contents (bfd *abfd, 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; } @@ -1462,19 +1623,8 @@ DESCRIPTION bfd_boolean bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) { - bfd_size_type sz = sec->rawsize ? sec->rawsize : sec->size; - bfd_byte *p = NULL; - - *buf = p; - if (sz == 0) - return TRUE; - - p = bfd_malloc (sec->rawsize > sec->size ? sec->rawsize : sec->size); - if (p == NULL) - return FALSE; - *buf = p; - - return bfd_get_section_contents (abfd, sec, p, 0, sz); + *buf = NULL; + return bfd_get_full_section_contents (abfd, sec, buf); } /* FUNCTION @@ -1494,8 +1644,8 @@ DESCRIPTION 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)) +. BFD_SEND (obfd, _bfd_copy_private_section_data, \ +. (ibfd, isection, obfd, osection)) */ /* @@ -1516,6 +1666,24 @@ bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, 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 @@ -1533,3 +1701,13 @@ bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, { 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); +}