X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=bfd%2Fsection.c;h=7f5365b9dbb9b387902b72cfd7296095013d74a0;hb=fafe6678a56d703ba0d3bfc32ff12f99b979f339;hp=840606d13d554113f4cef4d30466f337c47d0fd3;hpb=7ec49f9133feadc43acc49b1ee00674ecb9c1c15;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/section.c b/bfd/section.c index 840606d13d..7f5365b9db 100644 --- a/bfd/section.c +++ b/bfd/section.c @@ -1,5 +1,7 @@ /* Object file "section" support for the BFD library. - Copyright (C) 1990, 91, 92, 93, 94, 95, 1996 Free Software Foundation, Inc. + Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, + 2000, 2001, 2002, 2003, 2004 + Free Software Foundation, Inc. Written by Cygnus Support. This file is part of BFD, the Binary File Descriptor library. @@ -110,7 +112,6 @@ SUBSECTION | size 0x103 | | output_section --------| - SUBSECTION Link orders @@ -132,11 +133,10 @@ SUBSECTION */ - #include "bfd.h" #include "sysdep.h" #include "libbfd.h" - +#include "bfdlink.h" /* DOCDD @@ -149,303 +149,515 @@ SUBSECTION CODE_FRAGMENT . -.typedef struct sec -.{ -. {* The name of the section; the name isn't a copy, the pointer is -. the same as that passed to bfd_make_section. *} +.{* 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. *} . -. CONST char *name; +.struct bfd_comdat_info +.{ +. {* The name of the symbol associated with a comdat section. *} +. const char *name; . -. {* Which section is it; 0..nth. *} +. {* 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; +.}; . -. int index; +.typedef struct bfd_section +.{ +. {* The name of the section; the name isn't a copy, the pointer is +. the same as that passed to bfd_make_section. *} +. const char *name; . -. {* The next section in the list belonging to the BFD, or NULL. *} +. {* A unique sequence number. *} +. int id; . -. struct sec *next; +. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} +. int index; . -. {* The field flags contains attributes of the section. Some -. flags are read in from the object file, and some are -. synthesized from other information. *} +. {* The next section in the list belonging to the BFD, or NULL. *} +. struct bfd_section *next; . -. flagword flags; +. {* The field flags contains attributes of the section. Some +. flags are read in from the object file, and some are +. synthesized from other information. *} +. flagword flags; . .#define SEC_NO_FLAGS 0x000 . -. {* Tells the OS to allocate space for this section when loading. -. This is clear for a section containing debug information -. only. *} +. {* 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 . -. {* Tells the OS to load the section from the file when loading. -. This is clear for a .bss section. *} +. {* Tells the OS to load the section from the file when loading. +. This is clear for a .bss section. *} .#define SEC_LOAD 0x002 . -. {* The section contains data still to be relocated, so there is -. some relocation information too. *} +. {* The section contains data still to be relocated, so there is +. some relocation information too. *} .#define SEC_RELOC 0x004 . -.#if 0 {* Obsolete ? *} -.#define SEC_BALIGN 0x008 -.#endif +. {* 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. *} +. {* A signal to the OS that the section contains read only data. *} .#define SEC_READONLY 0x010 . -. {* The section contains code only. *} +. {* The section contains code only. *} .#define SEC_CODE 0x020 . -. {* The section contains data only. *} +. {* The section contains data only. *} .#define SEC_DATA 0x040 . -. {* The section will reside in ROM. *} +. {* The section will reside in ROM. *} .#define SEC_ROM 0x080 . -. {* The section contains constructor information. This section -. type is used by the linker to create lists of constructors and -. destructors used by <>. When a back end sees a symbol -. which should be used in a constructor list, it creates a new -. section for the type of name (e.g., <<__CTOR_LIST__>>), attaches -. the symbol to it, and builds a relocation. To build the lists -. of constructors, all the linker has to do is catenate all the -. sections called <<__CTOR_LIST__>> and relocate the data -. contained within - exactly the operations it would peform on -. standard data. *} +. {* The section contains constructor information. This section +. type is used by the linker to create lists of constructors and +. destructors used by <>. When a back end sees a symbol +. which should be used in a constructor list, it creates a new +. section for the type of name (e.g., <<__CTOR_LIST__>>), attaches +. the symbol to it, and builds a relocation. To build the lists +. of constructors, all the linker has to do is catenate all the +. sections called <<__CTOR_LIST__>> and relocate the data +. contained within - exactly the operations it would peform on +. standard data. *} .#define SEC_CONSTRUCTOR 0x100 . -. {* The section is a constuctor, and should be placed at the -. end of the text, data, or bss section(?). *} -.#define SEC_CONSTRUCTOR_TEXT 0x1100 -.#define SEC_CONSTRUCTOR_DATA 0x2100 -.#define SEC_CONSTRUCTOR_BSS 0x3100 -. -. {* The section has contents - a data section could be -. <> | <>; a debug section could be -. <> *} +. {* The section has contents - a data section could be +. <> | <>; a debug section could be +. <> *} .#define SEC_HAS_CONTENTS 0x200 . -. {* An instruction to the linker to not output the section -. even if it has information which would normally be written. *} +. {* 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. *} +. {* 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 . -. {* The section is a common section (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. *} +. {* The section contains thread local data. *} +.#define SEC_THREAD_LOCAL 0x1000 +. +. {* 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 0x4000 +. +. {* 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 . -. {* 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. *} +. {* 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 . -. {* 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. *} +. {* 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 . -. {* 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. *} +. {* 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 . -. {* The contents of this section are to be sorted by the -. based on the address specified in the associated symbol -. table. *} +. {* 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 . -. {* A mark flag used by some of the linker backends. This -. should not be set by application code. *} -.#define SEC_LINKER_MARK 0x100000 +. {* 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 +. +. {* If SEC_LINK_ONCE is set, this bitfield describes how the linker +. should handle duplicate sections. *} +.#define SEC_LINK_DUPLICATES 0x600000 . -. {* End of section flags. *} +. {* This value for SEC_LINK_DUPLICATES means that duplicate +. sections with the same name should simply be discarded. *} +.#define SEC_LINK_DUPLICATES_DISCARD 0x0 . -. {* The virtual memory address of the section - where it will be -. at run time. The symbols are relocated against this. The -. user_set_vma flag is maintained by bfd; if it's not set, the -. backend can assign addresses (for example, in <>, where -. the default address for <<.data>> is dependent on the specific -. target and various flags). *} +. {* 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 . -. bfd_vma vma; -. boolean user_set_vma; +. {* 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 . -. {* The load address of the section - where it would be in a -. rom image; really only used for writing section header -. information. *} +. {* 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 . -. bfd_vma lma; +. {* 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 . -. {* The size of the section in bytes, 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 *} +. {* This section should not be subject to garbage collection. *} +.#define SEC_KEEP 0x1000000 . -. bfd_size_type _cooked_size; +. {* This section contains "short" data, and should be placed +. "near" the GP. *} +.#define SEC_SMALL_DATA 0x2000000 . -. {* The original size on disk of the section, in bytes. Normally this -. value is the same as the size, but if some relaxing has -. been done, then this value will be bigger. *} +. {* This section contains data which may be shared with other +. executables or shared objects. *} +.#define SEC_SHARED 0x4000000 . -. bfd_size_type _raw_size; +. {* 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 +. +. {* Attempt to merge identical entities in the section. +. Entity size is given in the entsize field. *} +.#define SEC_MERGE 0x20000000 +. +. {* 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 +. +. {* This section contains data about section groups. *} +.#define SEC_GROUP 0x80000000 +. +. {* End of section flags. *} +. +. {* Some internal packed boolean fields. *} +. +. {* 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; +. +. {* Another mark flag used by some of the linker backends. Set for +. output sections that have an input section. *} +. unsigned int linker_has_input : 1; . -. {* If this section is going to be output, then this value is the -. offset into the output section of the first byte in the input -. section. E.g., if this was going to start at the 100th byte in -. the output section, this value would be 100. *} +. {* A mark flag used by some linker backends for garbage collection. *} +. unsigned int gc_mark : 1; . -. bfd_vma output_offset; +. {* The following flags are used by the ELF linker. *} . -. {* The output section through which to map on output. *} +. {* Mark sections which have been allocated to segments. *} +. unsigned int segment_mark : 1; . -. struct sec *output_section; +. {* 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 . -. {* The alignment requirement of the section, as an exponent of 2 - -. e.g., 3 aligns to 2^3 (or 8). *} +. {* Nonzero if this section uses RELA relocations, rather than REL. *} +. unsigned int use_rela_p:1; . -. unsigned int alignment_power; +. {* Bits used by various backends. *} +. unsigned int has_tls_reloc:1; . -. {* If an input section, a pointer to a vector of relocation -. records for the data in this section. *} +. {* Nonzero if this section needs the relax finalize pass. *} +. unsigned int need_finalize_relax:1; . -. struct reloc_cache_entry *relocation; +. {* Nonzero if this section has a gp reloc. *} +. unsigned int has_gp_reloc:1; . -. {* If an output section, a pointer to a vector of pointers to -. relocation records for the data in this section. *} +. {* 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; . -. struct reloc_cache_entry **orelocation; +. {* End of internal packed boolean fields. *} . -. {* The number of relocation records in one of the above *} +. {* The virtual memory address of the section - where it will be +. at run time. The symbols are relocated against this. The +. user_set_vma flag is maintained by bfd; if it's not set, the +. backend can assign addresses (for example, in <>, where +. the default address for <<.data>> is dependent on the specific +. target and various flags). *} +. bfd_vma vma; . -. unsigned reloc_count; +. {* The load address of the section - where it would be in a +. rom image; really only used for writing section header +. information. *} +. bfd_vma lma; . -. {* Information below is back end specific - and not always used -. or updated. *} +. {* 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; . -. {* File position of section data *} +. {* 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; . -. file_ptr filepos; +. {* 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 +. target). In most cases, if this was going to start at the +. 100th octet (8-bit quantity) in the output section, this value +. would be 100. However, if the target byte size is 16 bits +. (bfd_octets_per_byte is "2"), this value would be 50. *} +. bfd_vma output_offset; . -. {* File position of relocation info *} +. {* The output section through which to map on output. *} +. struct bfd_section *output_section; . -. file_ptr rel_filepos; +. {* The alignment requirement of the section, as an exponent of 2 - +. e.g., 3 aligns to 2^3 (or 8). *} +. unsigned int alignment_power; . -. {* File position of line data *} +. {* If an input section, a pointer to a vector of relocation +. records for the data in this section. *} +. struct reloc_cache_entry *relocation; . -. file_ptr line_filepos; +. {* If an output section, a pointer to a vector of pointers to +. relocation records for the data in this section. *} +. struct reloc_cache_entry **orelocation; . -. {* Pointer to data for applications *} +. {* The number of relocation records in one of the above. *} +. unsigned reloc_count; . -. PTR userdata; +. {* Information below is back end specific - and not always used +. or updated. *} . -. {* If the SEC_IN_MEMORY flag is set, this points to the actual -. contents. *} -. unsigned char *contents; +. {* File position of section data. *} +. file_ptr filepos; . -. {* Attached line number information *} +. {* File position of relocation info. *} +. file_ptr rel_filepos; . -. alent *lineno; +. {* File position of line data. *} +. file_ptr line_filepos; . -. {* Number of line number records *} +. {* Pointer to data for applications. *} +. void *userdata; . -. unsigned int lineno_count; +. {* If the SEC_IN_MEMORY flag is set, this points to the actual +. contents. *} +. unsigned char *contents; . -. {* When a section is being output, this value changes as more -. linenumbers are written out *} +. {* Attached line number information. *} +. alent *lineno; . -. file_ptr moving_line_filepos; +. {* Number of line number records. *} +. unsigned int lineno_count; . -. {* What the section number is in the target world *} +. {* Entity size for merging purposes. *} +. unsigned int entsize; . -. int target_index; +. {* Optional information about a COMDAT entry; NULL if not COMDAT. *} +. struct bfd_comdat_info *comdat; . -. PTR used_by_bfd; +. {* Points to the kept section if this section is a link-once section, +. and is discarded. *} +. struct bfd_section *kept_section; . -. {* If this is a constructor section then here is a list of the -. relocations created to relocate items within it. *} +. {* When a section is being output, this value changes as more +. linenumbers are written out. *} +. file_ptr moving_line_filepos; . -. struct relent_chain *constructor_chain; +. {* What the section number is in the target world. *} +. int target_index; . -. {* The BFD which owns the section. *} +. void *used_by_bfd; . -. bfd *owner; +. {* If this is a constructor section then here is a list of the +. relocations created to relocate items within it. *} +. struct relent_chain *constructor_chain; . -. boolean reloc_done; -. {* A symbol which points at this section only *} -. struct symbol_cache_entry *symbol; -. struct symbol_cache_entry **symbol_ptr_ptr; +. {* The BFD which owns the section. *} +. bfd *owner; . -. struct bfd_link_order *link_order_head; -. struct bfd_link_order *link_order_tail; -.} asection ; +. {* A symbol which points at this section only. *} +. struct bfd_symbol *symbol; +. struct bfd_symbol **symbol_ptr_ptr; . -. {* 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. *} +. struct bfd_link_order *link_order_head; +. struct bfd_link_order *link_order_tail; +.} asection; +. +.{* 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. *} .#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 const asection bfd_abs_section; +.{* 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 const asection bfd_und_section; +.{* 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 const asection bfd_com_section; +.{* Pointer to the common section. *} +.extern asection bfd_com_section; .#define bfd_com_section_ptr ((asection *) &bfd_com_section) -. {* Pointer to the indirect section *} -.extern const asection bfd_ind_section; +.{* 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) . -.extern const struct symbol_cache_entry * const bfd_abs_symbol; -.extern const struct symbol_cache_entry * const bfd_com_symbol; -.extern const struct symbol_cache_entry * const bfd_und_symbol; -.extern const struct symbol_cache_entry * const bfd_ind_symbol; +.#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; .#define bfd_get_section_size_before_reloc(section) \ -. (section->reloc_done ? (abort(),1): (section)->_raw_size) +. ((section)->_raw_size) .#define bfd_get_section_size_after_reloc(section) \ -. ((section->reloc_done) ? (section)->_cooked_size: (abort(),1)) +. ((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) \ +. do \ +. { \ +. asection **_ps = PS; \ +. asection *_s = *_ps; \ +. *_ps = _s->next; \ +. if (_s->next == NULL) \ +. (ABFD)->section_tail = _ps; \ +. } \ +. while (0) +.#define bfd_section_list_insert(ABFD, PS, S) \ +. do \ +. { \ +. asection **_ps = PS; \ +. asection *_s = S; \ +. _s->next = *_ps; \ +. *_ps = _s; \ +. if (_s->next == NULL) \ +. (ABFD)->section_tail = &_s->next; \ +. } \ +. while (0) +. */ +/* 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[] = { - /* the_bfd, name, value, attr, section [, udata] */ - {0, BFD_COM_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_com_section}, - {0, BFD_UND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_und_section}, - {0, BFD_ABS_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_abs_section}, - {0, BFD_IND_SECTION_NAME, 0, BSF_SECTION_SYM, (asection *) &bfd_ind_section}, + 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) }; -#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \ - const asymbol * const SYM = (asymbol *) &global_syms[IDX]; \ - const asection SEC = \ - { NAME, 0, 0, FLAGS, 0, false, 0, 0, 0, 0, (asection *) &SEC, \ - 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (boolean) 0, \ - (asymbol *) &global_syms[IDX], (asymbol **) &SYM, } +#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 \ + } STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol, BFD_COM_SECTION_NAME, 0); @@ -454,6 +666,77 @@ 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; +}; + +/* Initialize an entry in the section hash table. */ + +struct bfd_hash_entry * +bfd_section_hash_newfunc (struct bfd_hash_entry *entry, + struct bfd_hash_table *table, + const char *string) +{ + /* Allocate the structure if it has not already been allocated by a + subclass. */ + if (entry == NULL) + { + entry = (struct bfd_hash_entry *) + bfd_hash_allocate (table, sizeof (struct section_hash_entry)); + if (entry == NULL) + return entry; + } + + /* Call the allocation method of the superclass. */ + entry = bfd_hash_newfunc (entry, table, string); + if (entry != NULL) + memset (&((struct section_hash_entry *) entry)->section, 0, + sizeof (asection)); + + return entry; +} + +#define section_hash_lookup(table, string, create, copy) \ + ((struct section_hash_entry *) \ + bfd_hash_lookup ((table), (string), (create), (copy))) + +/* 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; + + /* 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; + + newsect->symbol->name = newsect->name; + newsect->symbol->value = 0; + newsect->symbol->section = newsect; + newsect->symbol->flags = BSF_SECTION_SYM; + + newsect->symbol_ptr_ptr = &newsect->symbol; + + 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; + return newsect; +} + /* DOCDD INODE @@ -464,12 +747,34 @@ SUBSECTION These are the functions exported by the section handling part of BFD. */ +/* +FUNCTION + bfd_section_list_clear + +SYNOPSIS + void bfd_section_list_clear (bfd *); + +DESCRIPTION + Clears the section list, and also resets the section count and + hash table entries. +*/ + +void +bfd_section_list_clear (bfd *abfd) +{ + abfd->sections = NULL; + abfd->section_tail = &abfd->sections; + abfd->section_count = 0; + memset (abfd->section_htab.table, 0, + abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); +} + /* FUNCTION bfd_get_section_by_name SYNOPSIS - asection *bfd_get_section_by_name(bfd *abfd, CONST char *name); + asection *bfd_get_section_by_name (bfd *abfd, const char *name); DESCRIPTION Run through @var{abfd} and return the one of the @@ -483,25 +788,120 @@ DESCRIPTION */ asection * -bfd_get_section_by_name (abfd, name) - bfd *abfd; - CONST char *name; +bfd_get_section_by_name (bfd *abfd, const char *name) { - asection *sect; + struct section_hash_entry *sh; + + sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE); + if (sh != NULL) + return &sh->section; + + return NULL; +} + +/* +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 <>. + +*/ + +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); - for (sect = abfd->sections; sect != NULL; sect = sect->next) - if (!strcmp (sect->name, name)) - return sect; return NULL; } +/* +FUNCTION + bfd_get_unique_section_name + +SYNOPSIS + char *bfd_get_unique_section_name + (bfd *abfd, const char *templat, int *count); + +DESCRIPTION + Invent a section name that is unique in @var{abfd} by tacking + a dot and a digit suffix onto the original @var{templat}. If + @var{count} is non-NULL, then it specifies the first number + tried as a suffix to generate a unique name. The value + pointed to by @var{count} will be incremented in this case. +*/ + +char * +bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count) +{ + int num; + unsigned int len; + char *sname; + + len = strlen (templat); + sname = bfd_malloc (len + 8); + if (sname == NULL) + return NULL; + memcpy (sname, templat, len); + num = 1; + if (count != NULL) + num = *count; + + do + { + /* If we have a million sections, something is badly wrong. */ + if (num > 999999) + abort (); + sprintf (sname + len, ".%d", num++); + } + while (section_hash_lookup (&abfd->section_htab, sname, FALSE, FALSE)); + + if (count != NULL) + *count = num; + return sname; +} /* FUNCTION bfd_make_section_old_way SYNOPSIS - asection *bfd_make_section_old_way(bfd *abfd, CONST char *name); + asection *bfd_make_section_old_way (bfd *abfd, const char *name); DESCRIPTION Create a new empty section called @var{name} @@ -517,22 +917,47 @@ DESCRIPTION o <> - If output has already started for this BFD. o <> - - If obstack alloc fails. + If memory allocation fails. */ - asection * -bfd_make_section_old_way (abfd, name) - bfd *abfd; - CONST char *name; +bfd_make_section_old_way (bfd *abfd, const char *name) { - asection *sec = bfd_get_section_by_name (abfd, name); - if (sec == (asection *) NULL) + struct section_hash_entry *sh; + asection *newsect; + + if (abfd->output_has_begun) + { + bfd_set_error (bfd_error_invalid_operation); + return NULL; + } + + 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; + + 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; + + newsect = &sh->section; + if (newsect->name != NULL) { - sec = bfd_make_section (abfd, name); + /* Section already exists. */ + return newsect; } - return sec; + + newsect->name = name; + return bfd_section_init (abfd, newsect); } /* @@ -540,7 +965,7 @@ FUNCTION bfd_make_section_anyway SYNOPSIS - asection *bfd_make_section_anyway(bfd *abfd, CONST char *name); + asection *bfd_make_section_anyway (bfd *abfd, const char *name); DESCRIPTION Create a new empty section called @var{name} and attach it to the end of @@ -549,17 +974,14 @@ DESCRIPTION Return <> and set <> on error; possible errors are: o <> - If output has already started for @var{abfd}. - o <> - If obstack alloc fails. + o <> - If memory allocation fails. */ sec_ptr -bfd_make_section_anyway (abfd, name) - bfd *abfd; - CONST char *name; +bfd_make_section_anyway (bfd *abfd, const char *name) { + struct section_hash_entry *sh; asection *newsect; - asection **prev = &abfd->sections; - asection *sect = abfd->sections; if (abfd->output_has_begun) { @@ -567,49 +989,30 @@ bfd_make_section_anyway (abfd, name) return NULL; } - while (sect) - { - prev = §->next; - sect = sect->next; - } - - newsect = (asection *) bfd_zalloc (abfd, sizeof (asection)); - if (newsect == NULL) - return NULL; - - newsect->name = name; - newsect->index = abfd->section_count++; - newsect->flags = SEC_NO_FLAGS; - - newsect->userdata = NULL; - newsect->contents = NULL; - newsect->next = (asection *) NULL; - newsect->relocation = (arelent *) NULL; - newsect->reloc_count = 0; - newsect->line_filepos = 0; - newsect->owner = abfd; - - /* Create a symbol whos 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) + sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); + if (sh == NULL) return NULL; - newsect->symbol->name = name; - newsect->symbol->value = 0; - newsect->symbol->section = newsect; - newsect->symbol->flags = BSF_SECTION_SYM; - newsect->symbol_ptr_ptr = &newsect->symbol; - - if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) + newsect = &sh->section; + if (newsect->name != NULL) { - free (newsect); - return 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; } - *prev = newsect; - return newsect; + newsect->name = name; + return bfd_section_init (abfd, newsect); } /* @@ -617,7 +1020,7 @@ FUNCTION bfd_make_section SYNOPSIS - asection *bfd_make_section(bfd *, CONST char *name); + asection *bfd_make_section (bfd *, const char *name); DESCRIPTION Like <>, but return <> (without calling @@ -627,53 +1030,50 @@ DESCRIPTION */ asection * -bfd_make_section (abfd, name) - bfd *abfd; - CONST char *name; +bfd_make_section (bfd *abfd, const char *name) { - asection *sect = abfd->sections; + struct section_hash_entry *sh; + asection *newsect; - 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) + if (abfd->output_has_begun) { - return bfd_und_section_ptr; + bfd_set_error (bfd_error_invalid_operation); + return NULL; } - if (strcmp (name, BFD_IND_SECTION_NAME) == 0) - { - return bfd_ind_section_ptr; - } + if (strcmp (name, BFD_ABS_SECTION_NAME) == 0 + || strcmp (name, BFD_COM_SECTION_NAME) == 0 + || strcmp (name, BFD_UND_SECTION_NAME) == 0 + || strcmp (name, BFD_IND_SECTION_NAME) == 0) + return NULL; - while (sect) + sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); + if (sh == NULL) + return NULL; + + newsect = &sh->section; + if (newsect->name != NULL) { - if (!strcmp (sect->name, name)) - return NULL; - sect = sect->next; + /* Section already exists. */ + return NULL; } - /* The name is not already used; go ahead and make a new section. */ - return bfd_make_section_anyway (abfd, name); + newsect->name = name; + return bfd_section_init (abfd, newsect); } - /* FUNCTION bfd_set_section_flags SYNOPSIS - boolean bfd_set_section_flags(bfd *abfd, asection *sec, flagword flags); + bfd_boolean bfd_set_section_flags + (bfd *abfd, asection *sec, flagword flags); DESCRIPTION Set the attributes of the section @var{sec} in the BFD - @var{abfd} to the value @var{flags}. Return <> on success, - <> on error. Possible error returns are: + @var{abfd} 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 @@ -682,12 +1082,10 @@ DESCRIPTION */ -/*ARGSUSED*/ -boolean -bfd_set_section_flags (abfd, section, flags) - bfd *abfd; - sec_ptr section; - flagword flags; +bfd_boolean +bfd_set_section_flags (bfd *abfd ATTRIBUTE_UNUSED, + sec_ptr section, + flagword flags) { #if 0 /* If you try to copy a text section from an input file (where it @@ -698,49 +1096,44 @@ bfd_set_section_flags (abfd, section, flags) if ((flags & bfd_applicable_section_flags (abfd)) != flags) { bfd_set_error (bfd_error_invalid_operation); - return false; + return FALSE; } #endif section->flags = flags; - return true; + return TRUE; } - /* FUNCTION bfd_map_over_sections SYNOPSIS - void bfd_map_over_sections(bfd *abfd, - void (*func)(bfd *abfd, - asection *sect, - PTR obj), - PTR obj); + void bfd_map_over_sections + (bfd *abfd, + void (*func) (bfd *abfd, asection *sect, void *obj), + void *obj); DESCRIPTION Call the provided function @var{func} for each section attached to the BFD @var{abfd}, passing @var{obj} as an argument. The function will be called as if by -| func(abfd, the_section, obj); +| func (abfd, the_section, obj); - This is the prefered method for iterating over sections; an + This is the preferred method for iterating over sections; an alternative would be to use a loop: | section *p; | for (p = abfd->sections; p != NULL; p = p->next) -| func(abfd, p, ...) - +| func (abfd, p, ...) */ -/*VARARGS2*/ void -bfd_map_over_sections (abfd, operation, user_storage) - bfd *abfd; - void (*operation) PARAMS ((bfd * abfd, asection * sect, PTR obj)); - PTR user_storage; +bfd_map_over_sections (bfd *abfd, + void (*operation) (bfd *, asection *, void *), + void *user_storage) { asection *sect; unsigned int i = 0; @@ -752,17 +1145,52 @@ bfd_map_over_sections (abfd, operation, user_storage) abort (); } +/* +FUNCTION + bfd_sections_find_if + +SYNOPSIS + asection *bfd_sections_find_if + (bfd *abfd, + 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}, 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. + +*/ + +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 SYNOPSIS - boolean bfd_set_section_size(bfd *abfd, asection *sec, bfd_size_type val); + bfd_boolean bfd_set_section_size + (bfd *abfd, asection *sec, bfd_size_type val); DESCRIPTION Set @var{sec} to the size @var{val}. If the operation is - ok, then <> is returned, else <>. + ok, then <> is returned, else <>. Possible error returns: o <> - @@ -770,25 +1198,22 @@ DESCRIPTION */ -boolean -bfd_set_section_size (abfd, ptr, val) - bfd *abfd; - sec_ptr ptr; - bfd_size_type val; +bfd_boolean +bfd_set_section_size (bfd *abfd, sec_ptr ptr, bfd_size_type val) { /* Once you've started writing to any section you cannot create or change - the size of any others. */ + the size of any others. */ if (abfd->output_has_begun) { bfd_set_error (bfd_error_invalid_operation); - return false; + return FALSE; } ptr->_cooked_size = val; ptr->_raw_size = val; - return true; + return TRUE; } /* @@ -796,23 +1221,17 @@ FUNCTION bfd_set_section_contents SYNOPSIS - boolean bfd_set_section_contents - (bfd *abfd, - asection *section, - PTR data, - file_ptr offset, - bfd_size_type count); - + bfd_boolean bfd_set_section_contents + (bfd *abfd, asection *section, const void *data, + file_ptr offset, bfd_size_type count); 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{offset} for @var{count} bytes. + @var{offset} for @var{count} octets. - - - Normally <> is returned, else <>. Possible error + Normally <> is returned, else <>. Possible error returns are: o <> - The output section does not have the <> @@ -822,48 +1241,44 @@ DESCRIPTION This routine is front end to the back end function <<_bfd_set_section_contents>>. - */ -#define bfd_get_section_size_now(abfd,sec) \ -(sec->reloc_done \ - ? bfd_get_section_size_after_reloc (sec) \ - : bfd_get_section_size_before_reloc (sec)) - -boolean -bfd_set_section_contents (abfd, section, location, offset, count) - bfd *abfd; - sec_ptr section; - PTR location; - file_ptr offset; - bfd_size_type count; +#define bfd_get_section_size_now(abfd, sec) \ + (sec->reloc_done \ + ? bfd_get_section_size_after_reloc (sec) \ + : bfd_get_section_size_before_reloc (sec)) + +bfd_boolean +bfd_set_section_contents (bfd *abfd, + sec_ptr section, + const void *location, + file_ptr offset, + bfd_size_type count) { bfd_size_type sz; if (!(bfd_get_section_flags (abfd, section) & SEC_HAS_CONTENTS)) { bfd_set_error (bfd_error_no_contents); - return (false); + return FALSE; } - if (offset < 0) - { - bad_val: - bfd_set_error (bfd_error_bad_value); - return false; - } sz = bfd_get_section_size_now (abfd, section); if ((bfd_size_type) offset > sz || count > sz - || offset + count > sz) - goto bad_val; + || offset + count > sz + || count != (size_t) count) + { + bfd_set_error (bfd_error_bad_value); + return FALSE; + } switch (abfd->direction) { case read_direction: case no_direction: bfd_set_error (bfd_error_invalid_operation); - return false; + return FALSE; case write_direction: break; @@ -872,18 +1287,23 @@ bfd_set_section_contents (abfd, section, location, offset, count) /* File is opened for update. `output_has_begun' some time ago when the file was created. Do not recompute sections sizes or alignments in _bfd_set_section_content. */ - abfd->output_has_begun = true; + abfd->output_has_begun = TRUE; break; } + /* Record a copy of the data in memory if desired. */ + if (section->contents + && location != section->contents + offset) + memcpy (section->contents + offset, location, (size_t) count); + if (BFD_SEND (abfd, _bfd_set_section_contents, (abfd, section, location, offset, count))) { - abfd->output_has_begun = true; - return true; + abfd->output_has_begun = TRUE; + return TRUE; } - return false; + return FALSE; } /* @@ -891,9 +1311,9 @@ FUNCTION bfd_get_section_contents SYNOPSIS - boolean bfd_get_section_contents - (bfd *abfd, asection *section, PTR location, - file_ptr offset, bfd_size_type count); + bfd_boolean bfd_get_section_contents + (bfd *abfd, asection *section, void *location, file_ptr offset, + bfd_size_type count); DESCRIPTION Read data from @var{section} in BFD @var{abfd} @@ -904,54 +1324,51 @@ DESCRIPTION If the contents of a constructor with the <> flag set are requested or if the section does not have the <> flag set, then the @var{location} is filled - with zeroes. If no errors occur, <> is returned, else - <>. - - + with zeroes. If no errors occur, <> is returned, else + <>. */ -boolean -bfd_get_section_contents (abfd, section, location, offset, count) - bfd *abfd; - sec_ptr section; - PTR location; - file_ptr offset; - bfd_size_type count; +bfd_boolean +bfd_get_section_contents (bfd *abfd, + sec_ptr section, + void *location, + file_ptr offset, + bfd_size_type count) { bfd_size_type sz; if (section->flags & SEC_CONSTRUCTOR) { - memset (location, 0, (unsigned) count); - return true; + memset (location, 0, (size_t) count); + return TRUE; } - if (offset < 0) + /* Even if reloc_done is TRUE, this function reads unrelocated + contents, so we want the raw size. */ + sz = section->_raw_size; + if ((bfd_size_type) offset > sz + || count > sz + || offset + count > sz + || count != (size_t) count) { - bad_val: bfd_set_error (bfd_error_bad_value); - return false; + return FALSE; } - /* Even if reloc_done is true, this function reads unrelocated - contents, so we want the raw size. */ - sz = section->_raw_size; - if ((bfd_size_type) offset > sz || count > sz || offset + count > sz) - goto bad_val; if (count == 0) /* Don't bother. */ - return true; + return TRUE; if ((section->flags & SEC_HAS_CONTENTS) == 0) { - memset (location, 0, (unsigned) count); - return true; + memset (location, 0, (size_t) count); + return TRUE; } if ((section->flags & SEC_IN_MEMORY) != 0) { memcpy (location, section->contents + offset, (size_t) count); - return true; + return TRUE; } return BFD_SEND (abfd, _bfd_get_section_contents, @@ -963,18 +1380,99 @@ FUNCTION bfd_copy_private_section_data SYNOPSIS - boolean bfd_copy_private_section_data(bfd *ibfd, asection *isec, bfd *obfd, asection *osec); + bfd_boolean bfd_copy_private_section_data + (bfd *ibfd, asection *isec, bfd *obfd, asection *osec); DESCRIPTION Copy private section information from @var{isec} in the BFD @var{ibfd} to the section @var{osec} in the BFD @var{obfd}. - Return <> on success, <> on error. Possible error + Return <> on success, <> on error. Possible error returns are: o <> - Not enough memory exists to create private data for @var{osec}. .#define bfd_copy_private_section_data(ibfd, isection, obfd, osection) \ -. BFD_SEND (ibfd, _bfd_copy_private_section_data, \ +. BFD_SEND (obfd, _bfd_copy_private_section_data, \ . (ibfd, isection, obfd, osection)) */ + +/* +FUNCTION + _bfd_strip_section_from_output + +SYNOPSIS + void _bfd_strip_section_from_output + (struct bfd_link_info *info, asection *section); + +DESCRIPTION + Remove @var{section} from the output. If the output section + becomes empty, remove it from the output bfd. + + This function won't actually do anything except twiddle flags + if called too late in the linking process, when it's not safe + to remove sections. +*/ +void +_bfd_strip_section_from_output (struct bfd_link_info *info, asection *s) +{ + 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; +} + +/* +FUNCTION + bfd_generic_is_group_section + +SYNOPSIS + bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec); + +DESCRIPTION + Returns TRUE if @var{sec} is a member of a group. +*/ + +bfd_boolean +bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, + const asection *sec ATTRIBUTE_UNUSED) +{ + return FALSE; +} + +/* +FUNCTION + bfd_generic_discard_group + +SYNOPSIS + bfd_boolean bfd_generic_discard_group (bfd *abfd, asection *group); + +DESCRIPTION + Remove all members of @var{group} from the output. +*/ + +bfd_boolean +bfd_generic_discard_group (bfd *abfd ATTRIBUTE_UNUSED, + asection *group ATTRIBUTE_UNUSED) +{ + return TRUE; +}