X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=bfd%2Fsection.c;h=17f5b4c3d83f10f548c6366d05df3722f3c8a369;hb=c69ad65744134f0c28432cc7c5204b9950f0b2c7;hp=6064924b4308cf979ad4900e6163059683372b08;hpb=a966dba9daedf21904c2be865c97aee21d6eca0d;p=deliverable%2Fbinutils-gdb.git diff --git a/bfd/section.c b/bfd/section.c index 6064924b43..17f5b4c3d8 100644 --- a/bfd/section.c +++ b/bfd/section.c @@ -1,23 +1,23 @@ /* Object file "section" support for the BFD library. - Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 98, 99, 2000 - 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, + MA 02110-1301, USA. */ /* SECTION @@ -65,10 +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 @@ -111,7 +108,6 @@ SUBSECTION | size 0x103 | | output_section --------| - SUBSECTION Link orders @@ -133,9 +129,8 @@ SUBSECTION */ - -#include "bfd.h" #include "sysdep.h" +#include "bfd.h" #include "libbfd.h" #include "bfdlink.h" @@ -150,81 +145,58 @@ SUBSECTION CODE_FRAGMENT . -.{* This structure is used for a comdat section, as in PE. A comdat -. section is associated with a particular symbol. When the linker -. sees a comdat section, it keeps only one of the sections with a -. given name and associated with a given symbol. *} -. -.struct bfd_comdat_info -.{ -. {* The name of the symbol associated with a comdat section. *} -. const char *name; -. -. {* The local symbol table index of the symbol associated with a -. comdat section. This is only meaningful to the object file format -. specific code; it is not an index into the list returned by -. bfd_canonicalize_symtab. *} -. long symbol; -. -. {* If this section is being discarded, the linker uses this field -. to point to the input section which is being kept. *} -. struct sec *sec; -.}; -. -.typedef struct sec +.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; . . {* A unique sequence number. *} +. unsigned int id; . -. int id; -. -. {* Which section is it; 0..nth. *} +. {* A unique section number which can be used by assembler to +. distinguish different sections with the same section name. *} +. unsigned int section_id; . -. int index; +. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *} +. unsigned int index; . . {* The next section in the list belonging to the BFD, or NULL. *} +. struct bfd_section *next; . -. struct sec *next; +. {* The previous section in the list belonging to the BFD, or NULL. *} +. struct bfd_section *prev; . . {* The field flags contains attributes of the section. Some . flags are read in from the object file, and some are . synthesized from other information. *} -. . 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 -. -.#if 0 {* Obsolete ? *} -.#define SEC_BALIGN 0x008 -.#endif +.#define SEC_RELOC 0x4 . . {* A signal to the OS that the section contains read only data. *} -.#define SEC_READONLY 0x010 +.#define SEC_READONLY 0x8 . . {* The section contains code only. *} -.#define SEC_CODE 0x020 +.#define SEC_CODE 0x10 . . {* The section contains data only. *} -.#define SEC_DATA 0x040 +.#define SEC_DATA 0x20 . . {* The section will reside in ROM. *} -.#define SEC_ROM 0x080 +.#define SEC_ROM 0x40 . . {* The section contains constructor information. This section . type is used by the linker to create lists of constructors and @@ -236,124 +208,168 @@ CODE_FRAGMENT . 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 constructor, 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 +.#define SEC_CONSTRUCTOR 0x80 . . {* The section has contents - a data section could be . <> | <>; a debug section could be . <> *} -.#define SEC_HAS_CONTENTS 0x200 +.#define SEC_HAS_CONTENTS 0x100 . . {* An instruction to the linker to not output the section . even if it has information which would normally be written. *} -.#define SEC_NEVER_LOAD 0x400 +.#define SEC_NEVER_LOAD 0x200 . -. {* 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 contains thread local data. *} +.#define SEC_THREAD_LOCAL 0x400 . -. {* The section has GOT references. This flag is only for the -. linker, and is currently only used by the elf32-hppa back end. -. It will be set if global offset table references were detected -. in this section, which indicate to the linker that the section -. contains PIC code, and must be handled specially when doing a -. static link. *} -.#define SEC_HAS_GOT_REF 0x4000 +. {* 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 0x8000 +.#define SEC_IS_COMMON 0x1000 . . {* The section contains only debugging information. For . example, this is set for ELF .debug and .stab sections. . strip tests this flag to see if a section can be . discarded. *} -.#define SEC_DEBUGGING 0x10000 +.#define SEC_DEBUGGING 0x2000 . . {* The contents of this section are held in memory pointed to . by the contents field. This is checked by bfd_get_section_contents, . and the data is retrieved from memory if appropriate. *} -.#define SEC_IN_MEMORY 0x20000 +.#define SEC_IN_MEMORY 0x4000 . . {* The contents of this section are to be excluded by the . linker for executable and shared objects unless those . objects are to be further relocated. *} -.#define SEC_EXCLUDE 0x40000 +.#define SEC_EXCLUDE 0x8000 . -. {* The contents of this section are to be sorted by the -. based on the address specified in the associated symbol -. table. *} -.#define SEC_SORT_ENTRIES 0x80000 +. {* 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 . . {* When linking, duplicate sections of the same name should be . discarded, rather than being combined into a single section as . is usually done. This is similar to how common symbols are . handled. See SEC_LINK_DUPLICATES below. *} -.#define SEC_LINK_ONCE 0x100000 +.#define SEC_LINK_ONCE 0x20000 . . {* If SEC_LINK_ONCE is set, this bitfield describes how the linker . should handle duplicate sections. *} -.#define SEC_LINK_DUPLICATES 0x600000 +.#define SEC_LINK_DUPLICATES 0xc0000 . . {* This value for SEC_LINK_DUPLICATES means that duplicate . sections with the same name should simply be discarded. *} -.#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 0x200000 +.#define SEC_LINK_DUPLICATES_ONE_ONLY 0x40000 . . {* This value for SEC_LINK_DUPLICATES means that the linker . should warn if any duplicate sections are a different size. *} -.#define SEC_LINK_DUPLICATES_SAME_SIZE 0x400000 +.#define SEC_LINK_DUPLICATES_SAME_SIZE 0x80000 . . {* This value for SEC_LINK_DUPLICATES means that the linker . should warn if any duplicate sections contain different . contents. *} -.#define SEC_LINK_DUPLICATES_SAME_CONTENTS 0x600000 +.#define SEC_LINK_DUPLICATES_SAME_CONTENTS \ +. (SEC_LINK_DUPLICATES_ONE_ONLY | SEC_LINK_DUPLICATES_SAME_SIZE) . . {* This section was created by the linker as part of dynamic . relocation or other arcane processing. It is skipped when . going through the first-pass output, trusting that someone . else up the line will take care of it later. *} -.#define SEC_LINKER_CREATED 0x800000 +.#define SEC_LINKER_CREATED 0x100000 . -. {* This section should not be subject to garbage collection. *} -.#define SEC_KEEP 0x1000000 +. {* This section 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 0x2000000 +.#define SEC_SMALL_DATA 0x400000 +. +. {* Attempt to merge identical entities in the section. +. Entity size is given in the entsize field. *} +.#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 0x1000000 +. +. {* This section contains data about section groups. *} +.#define SEC_GROUP 0x2000000 +. +. {* The section is a COFF shared library section. This flag is +. only for the linker. If this type of section appears in +. the input file, the linker must copy it to the output file +. without changing the vma or size. FIXME: Although this +. was originally intended to be general, it really is COFF +. specific (and the flag was renamed to indicate this). It +. might be cleaner to have some more general mechanism to +. allow the back end to control what the linker does with +. sections. *} +.#define SEC_COFF_SHARED_LIBRARY 0x4000000 +. +. {* This input section should be copied to output in reverse order +. as an array of pointers. This is for ELF linker internal use +. only. *} +.#define SEC_ELF_REVERSE_COPY 0x4000000 . . {* This section contains data which may be shared with other -. executables or shared objects. *} -.#define SEC_SHARED 0x4000000 +. executables or shared objects. This is for COFF only. *} +.#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. *} -.#define SEC_BLOCK 0x8000000 +. boundary. If the size of the input section is one page or more, +. it should be aligned on a page boundary. This is for TI +. TMS320C54X only. *} +.#define SEC_TIC54X_BLOCK 0x10000000 +. +. {* 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. *} -.#define SEC_CLINK 0x10000000 +. references found to any symbol in the section. This is for TI +. TMS320C54X only. *} +.#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. *} . @@ -362,18 +378,50 @@ CODE_FRAGMENT . {* 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; . -. {* A mark flag used by some linker backends for garbage collection. *} +. {* 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; +. +. {* Mark flag used by some linker backends for garbage collection. *} . unsigned int gc_mark : 1; . -. {* Used by the ELF code to mark sections which have been allocated to segments. *} +. {* 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. *} . unsigned int segment_mark : 1; . +. {* Type of sec_info information. *} +. unsigned int sec_info_type:3; +.#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; +. +. {* Bits used by various backends. The generic code doesn't touch +. these fields. *} +. +. unsigned int sec_flg0:1; +. unsigned int sec_flg1:1; +. unsigned int sec_flg2:1; +. unsigned int sec_flg3:1; +. unsigned int sec_flg4:1; +. unsigned int sec_flg5:1; +. . {* End of internal packed boolean fields. *} . . {* The virtual memory address of the section - where it will be @@ -382,26 +430,37 @@ CODE_FRAGMENT . 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; . . {* The load address of the section - where it would be in a . rom image; really only used for writing section header -. information. *} -. +. 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>>). This will be filled in after relocation. *} +. size of <<.bss>>). *} +. bfd_size_type size; +. +. {* For input sections, the original size on disk of the section, in +. octets. This field should be set for any section whose size is +. changed by linker relaxation. It is required for sections where +. the linker relaxation scheme doesn't cache altered section and +. reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing +. targets), and thus the original size needs to be kept to read the +. section multiple times. For output sections, rawsize holds the +. section size calculated on a previous linker relaxation pass. *} +. bfd_size_type rawsize; . -. bfd_size_type _cooked_size; +. {* The compressed size of the section in octets. *} +. bfd_size_type compressed_size; . -. {* 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. *} +. {* Relaxation table. *} +. struct relax_table *relax; +. +. {* Count of used relaxation table entries. *} +. int relax_count; . -. bfd_size_type _raw_size; . . {* If this section is going to be output, then this value is the . offset in *bytes* into the output section of the first byte in the @@ -410,197 +469,385 @@ CODE_FRAGMENT . 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; . . {* The output section through which to map on output. *} -. -. struct sec *output_section; +. struct bfd_section *output_section; . . {* The alignment requirement of the section, as an exponent of 2 - . e.g., 3 aligns to 2^3 (or 8). *} -. . unsigned int alignment_power; . . {* If an input section, a pointer to a vector of relocation . records for the data in this section. *} -. . struct reloc_cache_entry *relocation; . . {* 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; . -. {* The number of relocation records in one of the above *} -. +. {* The number of relocation records in one of the above. *} . unsigned reloc_count; . . {* Information below is back end specific - and not always used . or updated. *} . . {* File position of section data. *} -. . file_ptr filepos; . . {* File position of relocation info. *} -. . file_ptr rel_filepos; . . {* File position of line data. *} -. . file_ptr line_filepos; . . {* Pointer to data for applications. *} -. -. PTR userdata; +. void *userdata; . . {* If the SEC_IN_MEMORY flag is set, this points to the actual . contents. *} . unsigned char *contents; . . {* Attached line number information. *} -. . alent *lineno; . . {* Number of line number records. *} -. . unsigned int lineno_count; . -. {* Optional information about a COMDAT entry; NULL if not COMDAT. *} +. {* Entity size for merging purposes. *} +. unsigned int entsize; . -. struct bfd_comdat_info *comdat; +. {* Points to the kept section if this section is a link-once section, +. and is discarded. *} +. struct bfd_section *kept_section; . . {* When a section is being output, this value changes as more . linenumbers are written out. *} -. . file_ptr moving_line_filepos; . . {* What the section number is in the target world. *} -. . int target_index; . -. PTR used_by_bfd; +. void *used_by_bfd; . . {* 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; . . {* The BFD which owns the section. *} -. . bfd *owner; . -. {* A symbol which points at this section only *} -. struct symbol_cache_entry *symbol; -. struct symbol_cache_entry **symbol_ptr_ptr; +. {* A symbol which points at this section only. *} +. struct bfd_symbol *symbol; +. struct bfd_symbol **symbol_ptr_ptr; +. +. {* 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. 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; +.} . -. struct bfd_link_order *link_order_head; -. struct bfd_link_order *link_order_tail; -.} asection ; +.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 const 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; -.#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; -.#define bfd_com_section_ptr ((asection *) &bfd_com_section) -.{* Pointer to the indirect section *} -.extern const 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_get_section_size_before_reloc(section) \ -. ((section)->reloc_done ? (abort (), (bfd_size_type) 1) \ -. : (section)->_raw_size) -.#define bfd_get_section_size_after_reloc(section) \ -. ((section)->reloc_done ? (section)->_cooked_size \ -. : (abort (), (bfd_size_type) 1)) +.{* Pointer to the common 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. *} +.#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]; \ - const asection SEC = \ - /* name, id, index, next, flags, user_set_vma, reloc_done, */ \ - { NAME, IDX, 0, NULL, FLAGS, 0, 0, \ - \ - /* linker_mark, gc_mark, segment_mark, vma, lma, _cooked_size, */ \ - 0, 0, 0, 0, 0, 0, \ - \ - /* _raw_size, output_offset, output_section, alignment_power, */ \ - 0, 0, (struct sec *) &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, \ - \ - /* comdat, moving_line_filepos, target_index, used_by_bfd, */ \ - NULL, 0, 0, NULL, \ - \ - /* constructor_chain, owner, */ \ - NULL, NULL, \ - \ - /* symbol, */ \ - (struct symbol_cache_entry *) &global_syms[IDX], \ - \ - /* symbol_ptr_ptr, */ \ - (struct symbol_cache_entry **) &SYM, \ - \ - /* link_order_head, link_order_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); +asection _bfd_std_section[] = { + STD_SECTION (BFD_COM_SECTION_NAME, 0, SEC_IS_COMMON), + STD_SECTION (BFD_UND_SECTION_NAME, 1, 0), + STD_SECTION (BFD_ABS_SECTION_NAME, 2, 0), + STD_SECTION (BFD_IND_SECTION_NAME, 3, 0) +}; #undef STD_SECTION +/* Initialize an entry in the section hash table. */ + +struct 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))) + +/* 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. */ + +bfd_boolean +_bfd_generic_new_section_hook (bfd *abfd, asection *newsect) +{ + newsect->symbol = bfd_make_empty_symbol (abfd); + if (newsect->symbol == NULL) + return FALSE; + + 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; + 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; + + _bfd_section_id++; + abfd->section_count++; + bfd_section_list_append (abfd, newsect); + return newsect; +} + /* DOCDD INODE @@ -611,68 +858,198 @@ 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_last = NULL; + abfd->section_count = 0; + memset (abfd->section_htab.table, 0, + abfd->section_htab.size * sizeof (struct bfd_hash_entry *)); + abfd->section_htab.count = 0; +} + /* 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 - <>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 * -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; - for (sect = abfd->sections; sect != NULL; sect = sect->next) - if (!strcmp (sect->name, name)) - return sect; 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 + +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; + 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; +} /* FUNCTION bfd_get_unique_section_name SYNOPSIS - char *bfd_get_unique_section_name(bfd *abfd, - const char *templat, - int *count); + 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 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. + 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 (abfd, templat, count) - bfd *abfd; - const char *templat; - int *count; +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 + 7); - strcpy (sname, templat); + sname = (char *) bfd_malloc (len + 8); + if (sname == NULL) + return NULL; + memcpy (sname, templat, len); num = 1; if (count != NULL) num = *count; @@ -682,22 +1059,21 @@ bfd_get_unique_section_name (abfd, templat, count) /* If we have a million sections, something is badly wrong. */ if (num > 999999) abort (); - sprintf (sname + len, "%d", num++); + sprintf (sname + len, ".%d", num++); } - while (bfd_get_section_by_name (abfd, sname) != NULL); + 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} @@ -717,31 +1093,65 @@ DESCRIPTION */ - 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) + asection *newsect; + + if (abfd->output_has_begun) { - sec = bfd_make_section (abfd, name); + bfd_set_error (bfd_error_invalid_operation); + return NULL; } - return sec; + + if (strcmp (name, BFD_ABS_SECTION_NAME) == 0) + 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; + + 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); + } + + /* Call new_section_hook when "creating" the standard abs, com, und + and ind sections to tack on format specific section data. + Also, create a proper section symbol. */ + if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect))) + return NULL; + return newsect; } /* FUNCTION - bfd_make_section_anyway + bfd_make_section_anyway_with_flags SYNOPSIS - asection *bfd_make_section_anyway(bfd *abfd, const char *name); + asection *bfd_make_section_anyway_with_flags + (bfd *abfd, const char *name, flagword flags); DESCRIPTION Create a new empty section called @var{name} and attach it to the end of the chain of sections for @var{abfd}. Create a new section even if there - is already a section with that name. + is already a section with that name. Also set the attributes of the + new section to the value @var{flags}. Return <> and set <> on error; possible errors are: o <> - If output has already started for @var{abfd}. @@ -749,14 +1159,11 @@ DESCRIPTION */ sec_ptr -bfd_make_section_anyway (abfd, name) - bfd *abfd; - const char *name; +bfd_make_section_anyway_with_flags (bfd *abfd, const char *name, + flagword flags) { - static int section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */ + struct section_hash_entry *sh; asection *newsect; - asection **prev = &abfd->sections; - asection *sect = abfd->sections; if (abfd->output_has_begun) { @@ -764,115 +1171,138 @@ bfd_make_section_anyway (abfd, name) 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) { - prev = §->next; - sect = sect->next; - } + /* 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; - newsect = (asection *) bfd_zalloc (abfd, sizeof (asection)); - if (newsect == NULL) - return NULL; + new_sh->root = sh->root; + sh->root.next = &new_sh->root; + newsect = &new_sh->section; + } + newsect->flags = flags; newsect->name = name; - newsect->id = section_id++; - 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; - newsect->comdat = NULL; + return bfd_section_init (abfd, newsect); +} - /* 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) - return NULL; - newsect->symbol->name = name; - newsect->symbol->value = 0; - newsect->symbol->section = newsect; - newsect->symbol->flags = BSF_SECTION_SYM; +/* +FUNCTION + bfd_make_section_anyway - newsect->symbol_ptr_ptr = &newsect->symbol; +SYNOPSIS + asection *bfd_make_section_anyway (bfd *abfd, const char *name); - if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) - { - free (newsect); - return NULL; - } +DESCRIPTION + Create a new empty section called @var{name} and attach it to the end of + the chain of sections for @var{abfd}. Create a new section even if there + is already a section with that name. - *prev = newsect; - return newsect; + Return <> and set <> on error; possible errors are: + o <> - If output has already started for @var{abfd}. + o <> - If memory allocation fails. +*/ + +sec_ptr +bfd_make_section_anyway (bfd *abfd, const char *name) +{ + return bfd_make_section_anyway_with_flags (abfd, name, 0); } /* FUNCTION - bfd_make_section + bfd_make_section_with_flags SYNOPSIS - asection *bfd_make_section(bfd *, const char *name); + asection *bfd_make_section_with_flags + (bfd *, const char *name, flagword flags); DESCRIPTION Like <>, but return <> (without calling bfd_set_error ()) without changing the section chain if there is already a - section named @var{name}. If there is an error, return <> and set + section named @var{name}. Also set the attributes of the new section to + the value @var{flags}. If there is an error, return <> and set <>. */ asection * -bfd_make_section (abfd, name) - bfd *abfd; - const char *name; +bfd_make_section_with_flags (bfd *abfd, const char *name, + flagword flags) { - 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) + if (abfd == NULL || name == NULL || abfd->output_has_begun) { - return bfd_com_section_ptr; - } - if (strcmp (name, BFD_UND_SECTION_NAME) == 0) - { - 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; + + sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE); + if (sh == NULL) + return NULL; - while (sect) + 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; + newsect->flags = flags; + return bfd_section_init (abfd, newsect); } +/* +FUNCTION + bfd_make_section + +SYNOPSIS + asection *bfd_make_section (bfd *, const char *name); + +DESCRIPTION + Like <>, but return <> (without calling + bfd_set_error ()) without changing the section chain if there is already a + section named @var{name}. If there is an error, return <> and set + <>. +*/ + +asection * +bfd_make_section (bfd *abfd, const char *name) +{ + return bfd_make_section_with_flags (abfd, name, 0); +} /* FUNCTION bfd_set_section_flags SYNOPSIS - 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 @@ -881,65 +1311,66 @@ DESCRIPTION */ -/*ARGSUSED*/ -boolean -bfd_set_section_flags (abfd, section, flags) - bfd *abfd ATTRIBUTE_UNUSED; - sec_ptr section; - flagword flags; +bfd_boolean +bfd_set_section_flags (asection *section, flagword flags) { -#if 0 - /* If you try to copy a text section from an input file (where it - has the SEC_CODE flag set) to an output file, this loses big if - the bfd_applicable_section_flags (abfd) doesn't have the SEC_CODE - set - which it doesn't, at least not for a.out. FIXME */ - - if ((flags & bfd_applicable_section_flags (abfd)) != flags) - { - bfd_set_error (bfd_error_invalid_operation); - return false; - } -#endif - section->flags = flags; - return true; + 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 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; +| asection *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; @@ -951,17 +1382,51 @@ bfd_map_over_sections (abfd, operation, user_storage) abort (); } +/* +FUNCTION + bfd_sections_find_if + +SYNOPSIS + asection *bfd_sections_find_if + (bfd *abfd, + bfd_boolean (*operation) (bfd *abfd, asection *sect, void *obj), + void *obj); + +DESCRIPTION + Call the provided function @var{operation} for each section + attached to the BFD @var{abfd}, passing @var{obj} as an + argument. The function will be called as if by + +| operation (abfd, the_section, obj); + + It returns the first section for which @var{operation} returns true. + +*/ + +asection * +bfd_sections_find_if (bfd *abfd, + bfd_boolean (*operation) (bfd *, asection *, void *), + void *user_storage) +{ + asection *sect; + + for (sect = abfd->sections; sect != NULL; sect = sect->next) + if ((*operation) (abfd, sect, user_storage)) + break; + + return sect; +} /* FUNCTION bfd_set_section_size SYNOPSIS - 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 - ok, then <> is returned, else <>. + ok, then <> is returned, else <>. Possible error returns: o <> - @@ -969,25 +1434,20 @@ DESCRIPTION */ -boolean -bfd_set_section_size (abfd, ptr, val) - bfd *abfd; - sec_ptr ptr; - bfd_size_type val; +bfd_boolean +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. */ + 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; + return FALSE; } - ptr->_cooked_size = val; - ptr->_raw_size = val; - - return true; + sec->size = val; + return TRUE; } /* @@ -995,94 +1455,76 @@ 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{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>>. - */ -#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; +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)) + if (!(bfd_section_flags (section) & SEC_HAS_CONTENTS)) { bfd_set_error (bfd_error_no_contents); - return (false); + return FALSE; } - if (offset < 0) + sz = section->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; } - sz = bfd_get_section_size_now (abfd, section); - if ((bfd_size_type) offset > sz - || count > sz - || offset + count > sz) - goto bad_val; - 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; + return FALSE; } + /* 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; } /* @@ -1090,9 +1532,9 @@ 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} @@ -1103,154 +1545,169 @@ 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) + 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 + || 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; + 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; } return BFD_SEND (abfd, _bfd_get_section_contents, (abfd, section, location, offset, count)); } +/* +FUNCTION + bfd_malloc_and_get_section + +SYNOPSIS + bfd_boolean bfd_malloc_and_get_section + (bfd *abfd, asection *section, bfd_byte **buf); + +DESCRIPTION + Read all data from @var{section} in BFD @var{abfd} + into a buffer, *@var{buf}, malloc'd by this function. +*/ + +bfd_boolean +bfd_malloc_and_get_section (bfd *abfd, sec_ptr sec, bfd_byte **buf) +{ + *buf = NULL; + return bfd_get_full_section_contents (abfd, sec, buf); +} /* FUNCTION bfd_copy_private_section_data 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 (obfd, _bfd_copy_private_section_data, \ -. (ibfd, isection, obfd, osection)) +. BFD_SEND (obfd, _bfd_copy_private_section_data, \ +. (ibfd, isection, obfd, osection)) */ /* FUNCTION - _bfd_strip_section_from_output + bfd_generic_is_group_section SYNOPSIS - void _bfd_strip_section_from_output - (struct bfd_link_info *info, asection *section); + bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec); DESCRIPTION - Remove @var{section} from the output. If the output section - becomes empty, remove it from the output bfd. @var{info} may - be NULL; if it is not, it is used to decide whether the output - section is empty. + Returns TRUE if @var{sec} is a member of a group. */ -void -_bfd_strip_section_from_output (info, s) - struct bfd_link_info *info; - asection *s; + +bfd_boolean +bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED, + const asection *sec ATTRIBUTE_UNUSED) { - asection **spp, *os; - struct bfd_link_order *p, *pp; - boolean keep_os; - - /* Excise the input section from the link order. - - FIXME: For all calls that I can see to this function, the link - orders have not yet been set up. So why are we checking them? -- - Ian */ - os = s->output_section; - for (p = os->link_order_head, pp = NULL; p != NULL; pp = p, p = p->next) - if (p->type == bfd_indirect_link_order - && p->u.indirect.section == s) - { - if (pp) - pp->next = p->next; - else - os->link_order_head = p->next; - if (!p->next) - os->link_order_tail = pp; - break; - } - - keep_os = os->link_order_head != NULL; - - if (! keep_os && info != NULL) - { - bfd *abfd; - for (abfd = info->input_bfds; abfd != NULL; abfd = abfd->link_next) - { - asection *is; - for (is = abfd->sections; is != NULL; is = is->next) - { - if (is != s && is->output_section == os) - break; - } - if (is != NULL) - break; - } - if (abfd != NULL) - keep_os = true; - } + return FALSE; +} - /* If the output section is empty, remove it too. Careful about sections - that have been discarded in the link script -- they are mapped to - bfd_abs_section, which has no owner. */ - if (!keep_os && os->owner != NULL) - { - for (spp = &os->owner->sections; *spp; spp = &(*spp)->next) - if (*spp == os) - { - *spp = os->next; - os->owner->section_count--; - break; - } - } +/* +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 + +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; +} + +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); }