-/*doc*
-@section Sections
-Sections are supported in bfd in @code{section.c}.
+/* Object file "section" support for the BFD library.
+ Copyright (C) 1990-2020 Free Software Foundation, Inc.
+ Written by Cygnus Support.
-The raw data contained within a bfd is maintained through the section
-abstraction. A single bfd may have any number of sections, and keeps
-hold of them by pointing to the first, each one points to the next in
-the list.
+ 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 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.
+
+ 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
+ Sections
+
+ The raw data contained within a BFD is maintained through the
+ section abstraction. A single BFD may have any number of
+ sections. It keeps hold of them by pointing to the first;
+ each one points to the next in the list.
+
+ Sections are supported in BFD in <<section.c>>.
@menu
-* Section Input::
-* Section Output::
-* typedef asection::
-* section prototypes::
+@* Section Input::
+@* Section Output::
+@* typedef asection::
+@* section prototypes::
@end menu
-@node Section Input, Section Output,,Sections
-@comment node-name, next, previous, up
-@subsection Section Input
-When a bfd is opened for reading, the section structures are created
-and attatched to the bfd.
-
-Each section has a name which describes the section in the outside
-world - for example, @code{a.out} would contain at least three
-sections, called @code{.text}, @code{.data} and @code{.bss}.
-
-Sometimes a bfd will contain more than the 'natural' number of
-sections. A back end may attatch other sections containing constructor
-data, or an application may add a section (using bfd_make_section) to
-the sections attatched to an already open bfd. For example, the linker
-creates a supernumary section @code{COMMON} for each input file's bfd
-to hold information about common storage.
-
-The raw data is not necessarily read in at the same time as the
-section descriptor is created. Some targets may leave the data in
-place until a @code{bfd_get_section_contents} 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.
-
-@node Section Output,typedef asection,Section Input,Sections
-@subsection Section Output
-To write a new object style bfd, the various sections to be written
-have to be created. They are attatched to the bfd in the same way as
-input sections, data is written to the sections using
-@code{bfd_set_section_contents}.
-
-The linker uses the fields @code{output_section} and
-@code{output_offset} to create an output file.
-
-The data to be written comes from input sections attatched to the
-output sections. The output section structure can be considered a
-filter for the input section, the output section determines the vma of
-the output data and the name, but the input section determines the
-offset into the output section of the data to be written.
-
-Eg to create a section "O", starting at 0x100, 0x123 long, containing two
-subsections, "A" at offset 0x0 (ie at vma 0x100) and "B" at offset
-0x20 (ie at vma 0x120) the structures would look like:
-
-*+
-
- section name "A"
- output_offset 0x00
- size 0x20
- output_section -----------> section name "O"
- | vma 0x100
- section name "B" | size 0x123
- output_offset 0x20 |
- size 0x103 |
- output_section --------|
-
-*-
+INODE
+Section Input, Section Output, Sections, Sections
+SUBSECTION
+ Section input
+
+ When a BFD is opened for reading, the section structures are
+ created and attached to the BFD.
+
+ Each section has a name which describes the section in the
+ outside world---for example, <<a.out>> would contain at least
+ three sections, called <<.text>>, <<.data>> and <<.bss>>.
+
+ Names need not be unique; for example a COFF file may have several
+ sections named <<.data>>.
+
+ Sometimes a BFD will contain more than the ``natural'' number of
+ sections. A back end may attach other sections containing
+ constructor data, or an application may add a section (using
+ <<bfd_make_section>>) to the sections attached to an already open
+ BFD. For example, the linker creates an extra section
+ <<COMMON>> for each input file's BFD to hold information about
+ common storage.
+
+ The raw data is not necessarily read in when
+ the section descriptor is created. Some targets may leave the
+ data in place until a <<bfd_get_section_contents>> 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.
+
+INODE
+Section Output, typedef asection, Section Input, Sections
+
+SUBSECTION
+ Section output
+
+ To write a new object style BFD, the various sections to be
+ written have to be created. They are attached to the BFD in
+ the same way as input sections; data is written to the
+ sections using <<bfd_set_section_contents>>.
+
+ Any program that creates or combines sections (e.g., the assembler
+ and linker) must use the <<asection>> fields <<output_section>> and
+ <<output_offset>> to indicate the file sections to which each
+ section must be written. (If the section is being created from
+ scratch, <<output_section>> should probably point to the section
+ itself and <<output_offset>> should probably be zero.)
+
+ The data to be written comes from input sections attached
+ (via <<output_section>> pointers) to
+ the output sections. The output section structure can be
+ considered a filter for the input section: the output section
+ determines the vma of the output data and the name, but the
+ input section determines the offset into the output section of
+ the data to be written.
+
+ E.g., to create a section "O", starting at 0x100, 0x123 long,
+ containing two subsections, "A" at offset 0x0 (i.e., at vma
+ 0x100) and "B" at offset 0x20 (i.e., at vma 0x120) the <<asection>>
+ structures would look like:
+
+| section name "A"
+| output_offset 0x00
+| size 0x20
+| output_section -----------> section name "O"
+| | vma 0x100
+| section name "B" | size 0x123
+| output_offset 0x20 |
+| size 0x103 |
+| output_section --------|
+
+SUBSECTION
+ Link orders
+
+ The data within a section is stored in a @dfn{link_order}.
+ These are much like the fixups in <<gas>>. The link_order
+ abstraction allows a section to grow and shrink within itself.
+
+ A link_order knows how big it is, and which is the next
+ link_order and where the raw data for it is; it also points to
+ a list of relocations which apply to it.
+
+ The link_order is used by the linker to perform relaxing on
+ final code. The compiler creates code which is as big as
+ necessary to make it work without relaxing, and the user can
+ select whether to relax. Sometimes relaxing takes a lot of
+ time. The linker runs around the relocations to see if any
+ are attached to data which can be shrunk, if so it does it on
+ a link_order by link_order basis.
*/
-
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
+#include "bfdlink.h"
+
+/*
+DOCDD
+INODE
+typedef asection, section prototypes, Section Output, Sections
+SUBSECTION
+ typedef asection
+
+ Here is the section structure:
+
+CODE_FRAGMENT
+.
+.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;
+.
+. {* A unique section number which can be used by assembler to
+. distinguish different sections with the same section name. *}
+. unsigned int section_id;
+.
+. {* Which section in the bfd; 0..n-1 as sections are created in a bfd. *}
+. unsigned int index;
+.
+. {* The next section in the list belonging to the BFD, or NULL. *}
+. struct bfd_section *next;
+.
+. {* The previous section in the list belonging to the BFD, or NULL. *}
+. struct bfd_section *prev;
+.
+. {* The field flags contains attributes of the section. Some
+. flags are read in from the object file, and some are
+. synthesized from other information. *}
+. flagword flags;
+.
+.#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 0x1
+.
+. {* Tells the OS to load the section from the file when loading.
+. This is clear for a .bss section. *}
+.#define SEC_LOAD 0x2
+.
+. {* The section contains data still to be relocated, so there is
+. some relocation information too. *}
+.#define SEC_RELOC 0x4
+.
+. {* A signal to the OS that the section contains read only data. *}
+.#define SEC_READONLY 0x8
+.
+. {* The section contains code only. *}
+.#define SEC_CODE 0x10
+.
+. {* The section contains data only. *}
+.#define SEC_DATA 0x20
+.
+. {* The section will reside in ROM. *}
+.#define SEC_ROM 0x40
+.
+. {* The section contains constructor information. This section
+. type is used by the linker to create lists of constructors and
+. destructors used by <<g++>>. 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 0x80
+.
+. {* The section has contents - a data section could be
+. <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>; a debug section could be
+. <<SEC_HAS_CONTENTS>> *}
+.#define SEC_HAS_CONTENTS 0x100
+.
+. {* An instruction to the linker to not output the section
+. even if it has information which would normally be written. *}
+.#define SEC_NEVER_LOAD 0x200
+.
+. {* The section contains thread local data. *}
+.#define SEC_THREAD_LOCAL 0x400
+.
+. {* The section's size is fixed. Generic linker code will not
+. recalculate it and it is up to whoever has set this flag to
+. get the size right. *}
+.#define SEC_FIXED_SIZE 0x800
+.
+. {* The section contains common symbols (symbols may be defined
+. multiple times, the value of a symbol is the amount of
+. space it requires, and the largest symbol value is the one
+. used). Most targets have exactly one of these (which we
+. translate to bfd_com_section_ptr), but ECOFF has two. *}
+.#define SEC_IS_COMMON 0x1000
+.
+. {* The section contains only debugging information. For
+. example, this is set for ELF .debug and .stab sections.
+. strip tests this flag to see if a section can be
+. discarded. *}
+.#define SEC_DEBUGGING 0x2000
+.
+. {* The contents of this section are held in memory pointed to
+. by the contents field. This is checked by bfd_get_section_contents,
+. and the data is retrieved from memory if appropriate. *}
+.#define SEC_IN_MEMORY 0x4000
+.
+. {* The contents of this section are to be excluded by the
+. linker for executable and shared objects unless those
+. objects are to be further relocated. *}
+.#define SEC_EXCLUDE 0x8000
+.
+. {* 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 0x20000
+.
+. {* If SEC_LINK_ONCE is set, this bitfield describes how the linker
+. should handle duplicate sections. *}
+.#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
+.
+. {* 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 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 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 \
+. (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 0x100000
+.
+. {* 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 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. 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. 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. 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. *}
+.
+. {* Some internal packed boolean fields. *}
+.
+. {* See the vma field. *}
+. unsigned int user_set_vma : 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;
+.
+. {* Mark flag used by some linker backends for garbage collection. *}
+. unsigned int gc_mark : 1;
+.
+. {* Section compression status. *}
+. unsigned int compress_status : 2;
+.#define COMPRESS_SECTION_NONE 0
+.#define COMPRESS_SECTION_DONE 1
+.#define DECOMPRESS_SECTION_SIZED 2
+.
+. {* The following flags are used by the ELF linker. *}
+.
+. {* Mark sections which have been allocated to segments. *}
+. 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
+. 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 <<a.out>>, 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. *}
+. bfd_vma lma;
+.
+. {* The size of the section in *octets*, as it will be output.
+. Contains a value even if the section has no contents (e.g., the
+. size of <<.bss>>). *}
+. bfd_size_type size;
+.
+. {* For input sections, the original size on disk of the section, in
+. octets. This field should be set for any section whose size is
+. changed by linker relaxation. It is required for sections where
+. the linker relaxation scheme doesn't cache altered section and
+. reloc contents (stabs, eh_frame, SEC_MERGE, some coff relaxing
+. targets), and thus the original size needs to be kept to read the
+. section multiple times. For output sections, rawsize holds the
+. section size calculated on a previous linker relaxation pass. *}
+. bfd_size_type rawsize;
+.
+. {* The compressed size of the section in octets. *}
+. bfd_size_type compressed_size;
+.
+. {* Relaxation table. *}
+. struct relax_table *relax;
+.
+. {* Count of used relaxation table entries. *}
+. int relax_count;
+.
+.
+. {* If this section is going to be output, then this value is the
+. offset in *bytes* into the output section of the first byte in the
+. input section (byte ==> smallest addressable unit on the
+. 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;
+.
+. {* The output section through which to map on output. *}
+. 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. *}
+. 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. *}
+. 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;
+.
+. {* Entity size for merging purposes. *}
+. unsigned int entsize;
+.
+. {* 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;
+.
+. 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 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;
+.}
+.
+.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. *}
+.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*"
+.
+.{* 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
+.
+*/
+/* These symbols are global, not specific to any BFD. Therefore, anything
+ that tries to change them is broken, and should be repaired. */
-/*doc*
-@node typedef asection,section prototypes,Section Output,Sections
-@subsection typedef asection
-*/
+static const asymbol global_syms[] =
+{
+ 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(NAME, IDX, FLAGS) \
+ BFD_FAKE_SECTION(_bfd_std_section[IDX], &global_syms[IDX], NAME, IDX, FLAGS)
+
+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;
+}
-/*proto*
-The shape of a section struct:
+#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. */
-$typedef struct sec {
+bfd_boolean
+_bfd_generic_new_section_hook (bfd *abfd, asection *newsect)
+{
+ newsect->symbol = bfd_make_empty_symbol (abfd);
+ if (newsect->symbol == NULL)
+ return FALSE;
-The name of the section, the name isn't a copy, the pointer is
-the same as that passed to bfd_make_section.
+ newsect->symbol->name = newsect->name;
+ newsect->symbol->value = 0;
+ newsect->symbol->section = newsect;
+ newsect->symbol->flags = BSF_SECTION_SYM;
-$ CONST char *name;
+ newsect->symbol_ptr_ptr = &newsect->symbol;
+ return TRUE;
+}
-The next section in the list belonging to the bfd, or NULL.
+unsigned int _bfd_section_id = 0x10; /* id 0 to 3 used by STD_SECTION. */
-$ struct sec *next;
+/* Initializes a new section. NEWSECT->NAME is already set. */
-The field flags contains attributes of the section. Some of these
-flags are read in from the object file, and some are synthesized from
-other information.
+static asection *
+bfd_section_init (bfd *abfd, asection *newsect)
+{
+ newsect->id = _bfd_section_id;
+ newsect->index = abfd->section_count;
+ newsect->owner = abfd;
-$flagword flags;
+ if (! BFD_SEND (abfd, _new_section_hook, (abfd, newsect)))
+ return NULL;
+ _bfd_section_id++;
+ abfd->section_count++;
+ bfd_section_list_append (abfd, newsect);
+ return newsect;
+}
-$#define SEC_NO_FLAGS 0x000
+/*
+DOCDD
+INODE
+section prototypes, , typedef asection, Sections
+SUBSECTION
+ Section prototypes
-Tells the OS to allocate space for this section when loaded.
-This would clear for a section containing debug information only.
+These are the functions exported by the section handling part of BFD.
+*/
-$#define SEC_ALLOC 0x001
+/*
+FUNCTION
+ bfd_section_list_clear
-Tells the OS to load the section from the file when loading.
-This would be clear for a .bss section
+SYNOPSIS
+ void bfd_section_list_clear (bfd *);
-$#define SEC_LOAD 0x002
+DESCRIPTION
+ Clears the section list, and also resets the section count and
+ hash table entries.
+*/
-The section contains data still to be relocated, so there will be some
-relocation information too.
+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;
+}
-$#define SEC_RELOC 0x004
+/*
+FUNCTION
+ bfd_get_section_by_name
-Obsolete ?
+SYNOPSIS
+ asection *bfd_get_section_by_name (bfd *abfd, const char *name);
-$#define SEC_BALIGN 0x008
+DESCRIPTION
+ Return the most recently created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
+*/
-A signal to the OS that the section contains read only data.
+asection *
+bfd_get_section_by_name (bfd *abfd, const char *name)
+{
+ struct section_hash_entry *sh;
-$#define SEC_READONLY 0x010
+ sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);
+ if (sh != NULL)
+ return &sh->section;
-The section contains code only.
+ return NULL;
+}
-$#define SEC_CODE 0x020
+/*
+FUNCTION
+ bfd_get_next_section_by_name
-The section contains data only.
+SYNOPSIS
+ asection *bfd_get_next_section_by_name (bfd *ibfd, asection *sec);
-$#define SEC_DATA 0x040
+DESCRIPTION
+ Given @var{sec} is a section returned by @code{bfd_get_section_by_name},
+ return the next most recently created section attached to the same
+ BFD with the same name, or if no such section exists in the same BFD and
+ IBFD is non-NULL, the next section with the same name in any input
+ BFD following IBFD. Return NULL on finding no section.
+*/
-The section will reside in ROM.
+asection *
+bfd_get_next_section_by_name (bfd *ibfd, asection *sec)
+{
+ struct section_hash_entry *sh;
+ const char *name;
+ unsigned long hash;
+
+ sh = ((struct section_hash_entry *)
+ ((char *) sec - offsetof (struct section_hash_entry, section)));
+
+ hash = sh->root.hash;
+ name = sec->name;
+ for (sh = (struct section_hash_entry *) sh->root.next;
+ sh != NULL;
+ sh = (struct section_hash_entry *) sh->root.next)
+ if (sh->root.hash == hash
+ && strcmp (sh->root.string, name) == 0)
+ return &sh->section;
+
+ if (ibfd != NULL)
+ {
+ while ((ibfd = ibfd->link.next) != NULL)
+ {
+ asection *s = bfd_get_section_by_name (ibfd, name);
+ if (s != NULL)
+ return s;
+ }
+ }
-$#define SEC_ROM 0x080
+ return NULL;
+}
-The section contains constructor information. This section type is
-used by the linker to create lists of constructors and destructors
-used by @code{g++}. 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
-(eg @code{__CTOR_LIST__}), attatches the symbol to it and builds a
-relocation. To build the lists of constructors, all the linker has to
-to is catenate all the sections called @code{__CTOR_LIST__} and
-relocte the data contained within - exactly the operations it would
-peform on standard data.
+/*
+FUNCTION
+ bfd_get_linker_section
-$#define SEC_CONSTRUCTOR 0x100
+SYNOPSIS
+ asection *bfd_get_linker_section (bfd *abfd, const char *name);
-The section has contents - a bss section could be
-@code{SEC_ALLOC} | @code{SEC_HAS_CONTENTS}, a debug section could be
-@code{SEC_HAS_CONTENTS}
+DESCRIPTION
+ Return the linker created section attached to @var{abfd}
+ named @var{name}. Return NULL if no such section exists.
+*/
-$#define SEC_HAS_CONTENTS 0x200
+asection *
+bfd_get_linker_section (bfd *abfd, const char *name)
+{
+ asection *sec = bfd_get_section_by_name (abfd, name);
-An instruction to the linker not to output sections containing
-this flag even if they have information which would normally be written.
+ while (sec != NULL && (sec->flags & SEC_LINKER_CREATED) == 0)
+ sec = bfd_get_next_section_by_name (NULL, sec);
+ return sec;
+}
-$#define SEC_NEVER_LOAD 0x400
+/*
+FUNCTION
+ bfd_get_section_by_name_if
-The base address of the section in the address space of the target.
+SYNOPSIS
+ asection *bfd_get_section_by_name_if
+ (bfd *abfd,
+ const char *name,
+ bfd_boolean (*func) (bfd *abfd, asection *sect, void *obj),
+ void *obj);
-$ bfd_vma vma;
+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
-The size of the section in bytes of the loaded section. This contains
-a value even if the section has no contents (eg, the size of @code{.bss}).
+| func (abfd, the_section, obj);
-$ bfd_size_type size;
+ It returns the first section for which @var{func} returns true,
+ otherwise <<NULL>>.
-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. Eg, if this was going to start at the 100th byte in the
-output section, this value would be 100.
+*/
-$ bfd_vma output_offset;
+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;
-The output section through which to map on output.
+ sh = section_hash_lookup (&abfd->section_htab, name, FALSE, FALSE);
+ if (sh == NULL)
+ return NULL;
-$ struct sec *output_section;
+ 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;
-The alignment requirement of the section, as an exponent - eg 3
-aligns to 2^3 (or 8)
+ return NULL;
+}
-$ unsigned int alignment_power;
+/*
+FUNCTION
+ bfd_get_unique_section_name
-If an input section, a pointer to a vector of relocation records for
-the data in this section.
+SYNOPSIS
+ char *bfd_get_unique_section_name
+ (bfd *abfd, const char *templat, int *count);
-$ struct reloc_cache_entry *relocation;
+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.
+*/
-If an output section, a pointer to a vector of pointers to
-relocation records for the data in this section.
+char *
+bfd_get_unique_section_name (bfd *abfd, const char *templat, int *count)
+{
+ int num;
+ unsigned int len;
+ char *sname;
-$ struct reloc_cache_entry **orelocation;
+ len = strlen (templat);
+ sname = (char *) 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;
+}
-The number of relocation records in one of the above
+/*
+FUNCTION
+ bfd_make_section_old_way
-$ unsigned reloc_count;
+SYNOPSIS
+ asection *bfd_make_section_old_way (bfd *abfd, const char *name);
-Which section is it 0..nth
+DESCRIPTION
+ Create a new empty section called @var{name}
+ and attach it to the end of the chain of sections for the
+ BFD @var{abfd}. An attempt to create a section with a name which
+ is already in use returns its pointer without changing the
+ section chain.
-$ int index;
+ It has the funny name since this is the way it used to be
+ before it was rewritten....
-Information below is back end specific - and not always used or
-updated
+ Possible errors are:
+ o <<bfd_error_invalid_operation>> -
+ If output has already started for this BFD.
+ o <<bfd_error_no_memory>> -
+ If memory allocation fails.
-File position of section data
+*/
-$ file_ptr filepos;
-File position of relocation info
+asection *
+bfd_make_section_old_way (bfd *abfd, const char *name)
+{
+ asection *newsect;
+
+ if (abfd->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ 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;
+}
-$ file_ptr rel_filepos;
+/*
+FUNCTION
+ bfd_make_section_anyway_with_flags
-File position of line data
+SYNOPSIS
+ asection *bfd_make_section_anyway_with_flags
+ (bfd *abfd, const char *name, flagword flags);
-$ file_ptr line_filepos;
+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. Also set the attributes of the
+ new section to the value @var{flags}.
-Pointer to data for applications
+ Return <<NULL>> and set <<bfd_error>> on error; possible errors are:
+ o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}.
+ o <<bfd_error_no_memory>> - If memory allocation fails.
+*/
-$ PTR userdata;
+sec_ptr
+bfd_make_section_anyway_with_flags (bfd *abfd, const char *name,
+ flagword flags)
+{
+ struct section_hash_entry *sh;
+ asection *newsect;
-$ struct lang_output_section *otheruserdata;
+ if (abfd->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
-Attached line number information
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
+ return NULL;
-$ alent *lineno;
-Number of line number records
+ newsect = &sh->section;
+ if (newsect->name != NULL)
+ {
+ /* We are making a section of the same name. Put it in the
+ section hash table. Even though we can't find it directly by a
+ hash lookup, we'll be able to find the section by traversing
+ sh->root.next quicker than looking at all the bfd sections. */
+ struct section_hash_entry *new_sh;
+ new_sh = (struct section_hash_entry *)
+ bfd_section_hash_newfunc (NULL, &abfd->section_htab, name);
+ if (new_sh == NULL)
+ return NULL;
+
+ new_sh->root = sh->root;
+ sh->root.next = &new_sh->root;
+ newsect = &new_sh->section;
+ }
+
+ newsect->flags = flags;
+ newsect->name = name;
+ return bfd_section_init (abfd, newsect);
+}
-$ unsigned int lineno_count;
+/*
+FUNCTION
+ bfd_make_section_anyway
-When a section is being output, this value changes as more
-linenumbers are written out
+SYNOPSIS
+ asection *bfd_make_section_anyway (bfd *abfd, const char *name);
-$ file_ptr moving_line_filepos;
+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.
-what the section number is in the target world
+ Return <<NULL>> and set <<bfd_error>> on error; possible errors are:
+ o <<bfd_error_invalid_operation>> - If output has already started for @var{abfd}.
+ o <<bfd_error_no_memory>> - If memory allocation fails.
+*/
-$ unsigned int target_index;
+sec_ptr
+bfd_make_section_anyway (bfd *abfd, const char *name)
+{
+ return bfd_make_section_anyway_with_flags (abfd, name, 0);
+}
-$ PTR used_by_bfd;
+/*
+FUNCTION
+ bfd_make_section_with_flags
-If this is a constructor section then here is a list of the
-relocations created to relocate items within it.
+SYNOPSIS
+ asection *bfd_make_section_with_flags
+ (bfd *, const char *name, flagword flags);
-$ struct relent_chain *constructor_chain;
+DESCRIPTION
+ Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
+ bfd_set_error ()) without changing the section chain if there is already a
+ section named @var{name}. Also set the attributes of the new section to
+ the value @var{flags}. If there is an error, return <<NULL>> and set
+ <<bfd_error>>.
+*/
-The bfd which owns the section.
+asection *
+bfd_make_section_with_flags (bfd *abfd, const char *name,
+ flagword flags)
+{
+ struct section_hash_entry *sh;
+ asection *newsect;
+
+ if (abfd == NULL || name == NULL || abfd->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return NULL;
+ }
+
+ 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;
-$ bfd *owner;
+ sh = section_hash_lookup (&abfd->section_htab, name, TRUE, FALSE);
+ if (sh == NULL)
+ return NULL;
-$} asection ;
+ newsect = &sh->section;
+ if (newsect->name != NULL)
+ {
+ /* Section already exists. */
+ return NULL;
+ }
-*---
+ newsect->name = name;
+ newsect->flags = flags;
+ return bfd_section_init (abfd, newsect);
+}
-*/
+/*
+FUNCTION
+ bfd_make_section
-/*doc*
-@node section prototypes,Section,typedef section,Sections
-@subsection section prototypes
+SYNOPSIS
+ asection *bfd_make_section (bfd *, const char *name);
+DESCRIPTION
+ Like <<bfd_make_section_anyway>>, but return <<NULL>> (without calling
+ bfd_set_error ()) without changing the section chain if there is already a
+ section named @var{name}. If there is an error, return <<NULL>> and set
+ <<bfd_error>>.
*/
-/*proto* bfd_get_section_by_name
-Runs through the provided @var{abfd} and returns the @code{asection}
-who's name matches that provided, otherwise NULL. @xref{Sections}, for more information.
-*; PROTO(asection *, bfd_get_section_by_name,
- (bfd *abfd, CONST char *name));
-*/
asection *
-DEFUN(bfd_get_section_by_name,(abfd, name),
- bfd *abfd AND
- CONST char *name)
+bfd_make_section (bfd *abfd, const char *name)
{
- asection *sect;
-
- for (sect = abfd->sections; sect != NULL; sect = sect->next)
- if (!strcmp (sect->name, name)) return sect;
- return NULL;
+ return bfd_make_section_with_flags (abfd, name, 0);
}
+/*
+FUNCTION
+ bfd_set_section_flags
-/*proto* bfd_make_section
-This function creates a new empty section called @var{name} and attatches it
-to the end of the chain of sections for @var{bfd}. An attempt to
-create a section with a name which is already in use, returns the old
-section by that name instead.
+SYNOPSIS
+ bfd_boolean bfd_set_section_flags (asection *sec, flagword flags);
-Possible errors are:
-@table @code
-@item invalid_operation
-If output has already started for this bfd.
-@item no_memory
-If obstack alloc fails.
-@end table
+DESCRIPTION
+ Set the attributes of the section @var{sec} to the value @var{flags}.
+ Return <<TRUE>> on success, <<FALSE>> on error. Possible error
+ returns are:
+
+ o <<bfd_error_invalid_operation>> -
+ The section cannot have one or more of the attributes
+ requested. For example, a .bss section in <<a.out>> may not
+ have the <<SEC_HAS_CONTENTS>> field set.
-*; PROTO(asection *, bfd_make_section, (bfd *, CONST char *name));
*/
+bfd_boolean
+bfd_set_section_flags (asection *section, flagword flags)
+{
+ section->flags = flags;
+ return TRUE;
+}
+
+/*
+FUNCTION
+ bfd_rename_section
+SYNOPSIS
+ void bfd_rename_section
+ (asection *sec, const char *newname);
-sec_ptr
-DEFUN(bfd_make_section,(abfd, name),
- bfd *abfd AND
- CONST char * name)
+DESCRIPTION
+ Rename section @var{sec} to @var{newname}.
+*/
+
+void
+bfd_rename_section (asection *sec, const char *newname)
{
- asection *newsect;
- asection ** prev = &abfd->sections;
- asection * sect = abfd->sections;
-
- if (abfd->output_has_begun) {
- bfd_error = invalid_operation;
- return NULL;
- }
+ struct section_hash_entry *sh;
- while (sect) {
- if (!strcmp(sect->name, name)) return sect;
- prev = §->next;
- sect = sect->next;
- }
+ 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);
+}
- newsect = (asection *) bfd_zalloc(abfd, sizeof (asection));
- if (newsect == NULL) {
- bfd_error = no_memory;
- return NULL;
- }
+/*
+FUNCTION
+ bfd_map_over_sections
- newsect->name = name;
- newsect->index = abfd->section_count++;
- newsect->flags = SEC_NO_FLAGS;
-
- newsect->userdata = 0;
- newsect->next = (asection *)NULL;
- newsect->relocation = (arelent *)NULL;
- newsect->reloc_count = 0;
- newsect->line_filepos =0;
- newsect->owner = abfd;
- if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) {
- free (newsect);
- return NULL;
- }
+SYNOPSIS
+ void bfd_map_over_sections
+ (bfd *abfd,
+ void (*func) (bfd *abfd, asection *sect, void *obj),
+ void *obj);
- *prev = newsect;
- return newsect;
-}
+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);
+ This is the preferred method for iterating over sections; an
+ alternative would be to use a loop:
-/*proto* bfd_set_section_flags
-Attempts to set the attributes of the section named in the bfd
-supplied to the value. Returns true on success, false on error.
-Possible error returns are:
-@table @code
-@item invalid operation
-The section cannot have one or more of the attributes requested. For
-example, a .bss section in @code{a.out} may not have the
-@code{SEC_HAS_CONTENTS} field set.
-@end table
+| asection *p;
+| for (p = abfd->sections; p != NULL; p = p->next)
+| func (abfd, p, ...)
-*; PROTO(boolean, bfd_set_section_flags,
- (bfd *, asection *, flagword));
*/
-boolean
-DEFUN(bfd_set_section_flags,(abfd, section, flags),
- bfd *abfd AND
- sec_ptr section AND
- flagword flags)
+void
+bfd_map_over_sections (bfd *abfd,
+ void (*operation) (bfd *, asection *, void *),
+ void *user_storage)
{
- if ((flags & bfd_applicable_section_flags (abfd)) != flags) {
- bfd_error = invalid_operation;
- return false;
- }
+ asection *sect;
+ unsigned int i = 0;
- section->flags = flags;
- return true;
-}
+ for (sect = abfd->sections; sect != NULL; i++, sect = sect->next)
+ (*operation) (abfd, sect, user_storage);
+ if (i != abfd->section_count) /* Debugging */
+ abort ();
+}
-/*proto* bfd_map_over_sections
-Calls the provided function @var{func} for each section attatched to
-the bfd @var{abfd}, passing @var{obj} as an argument. The function
-will be called as if by
+/*
+FUNCTION
+ bfd_sections_find_if
-@example
- func(abfd, the_section, obj);
-@end example
+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
-*; PROTO(void, bfd_map_over_sections,
- (bfd *abfd, void (*func)(), PTR obj));
+| operation (abfd, the_section, obj);
-This is the prefered method for iterating over sections, an
-alternative would be to use a loop:
+ It returns the first section for which @var{operation} returns true.
-@example
- section *p;
- for (p = abfd->sections; p != NULL; p = p->next)
- func(abfd, p, ...)
-@end example
*/
-/*VARARGS2*/
-void
-DEFUN(bfd_map_over_sections,(abfd, operation, user_storage),
- bfd *abfd AND
- void (*operation)() AND
- PTR user_storage)
+asection *
+bfd_sections_find_if (bfd *abfd,
+ bfd_boolean (*operation) (bfd *, asection *, void *),
+ void *user_storage)
{
asection *sect;
- int i = 0;
-
- for (sect = abfd->sections; sect != NULL; i++, sect = sect->next)
- (*operation) (abfd, sect, user_storage);
- if (i != abfd->section_count) /* Debugging */
- abort();
+ for (sect = abfd->sections; sect != NULL; sect = sect->next)
+ if ((*operation) (abfd, sect, user_storage))
+ break;
+
+ return sect;
}
+/*
+FUNCTION
+ bfd_set_section_size
-/*proto* bfd_set_section_size
-Sets @var{section} to the size @var{val}. If the operation is ok, then
-@code{true} is returned, else @code{false}.
+SYNOPSIS
+ bfd_boolean bfd_set_section_size (asection *sec, bfd_size_type val);
-Possible error returns:
-@table @code
-@item invalid_operation
-Writing has started to the bfd, so setting the size is invalid
-@end table
+DESCRIPTION
+ Set @var{sec} to the size @var{val}. If the operation is
+ ok, then <<TRUE>> is returned, else <<FALSE>>.
+
+ Possible error returns:
+ o <<bfd_error_invalid_operation>> -
+ Writing has started to the BFD, so setting the size is invalid.
-*; PROTO(boolean, bfd_set_section_size,
- (bfd *, asection *, bfd_size_type val));
*/
-boolean
-DEFUN(bfd_set_section_size,(abfd, ptr, val),
- bfd *abfd AND
- sec_ptr ptr AND
- unsigned long 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) {
- bfd_error = invalid_operation;
- return false;
- }
+ if (sec->owner == NULL || sec->owner->output_has_begun)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return FALSE;
+ }
- ptr->size = val;
-
- return true;
+ sec->size = val;
+ return TRUE;
}
-/*proto* bfd_set_section_contents
-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.
-
-Normally @code{true} is returned, else @code{false}. Possible error
-returns are:
-@table @code
-@item no_contents
-The output section does not have the @code{SEC_HAS_CONTENTS}
-attribute, so nothing can be written to it.
-@item and some more too
-@end table
-This routine is front end to the back end function @code{_bfd_set_section_contents}.
-
-*; PROTO(boolean, bfd_set_section_contents,
- (bfd *abfd,
- asection *section,
- PTR data,
- file_ptr offset,
- bfd_size_type count));
+/*
+FUNCTION
+ bfd_set_section_contents
+
+SYNOPSIS
+ 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{location}.
+ The data is written to the output section starting at offset
+ @var{offset} for @var{count} octets.
+
+ Normally <<TRUE>> is returned, but <<FALSE>> is returned if
+ there was an error. Possible error returns are:
+ o <<bfd_error_no_contents>> -
+ The output section does not have the <<SEC_HAS_CONTENTS>>
+ attribute, so nothing can be written to it.
+ o <<bfd_error_bad_value>> -
+ The section is unable to contain all of the data.
+ o <<bfd_error_invalid_operation>> -
+ The BFD is not writeable.
+ o and some more too.
+
+ This routine is front end to the back end function
+ <<_bfd_set_section_contents>>.
*/
-boolean
-DEFUN(bfd_set_section_contents,(abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- 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)
{
- if (!(bfd_get_section_flags(abfd, section) & SEC_HAS_CONTENTS))
- {
- bfd_error = no_contents;
- return(false);
- }
+ bfd_size_type sz;
+
+ if (!(bfd_section_flags (section) & SEC_HAS_CONTENTS))
+ {
+ bfd_set_error (bfd_error_no_contents);
+ return FALSE;
+ }
+
+ sz = section->size;
+ if ((bfd_size_type) offset > sz
+ || count > sz
+ || offset + count > sz
+ || count != (size_t) count)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ if (!bfd_write_p (abfd))
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ 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, section, location, offset, count)))
+ {
+ abfd->output_has_begun = TRUE;
+ return TRUE;
+ }
+
+ return FALSE;
+}
+
+/*
+FUNCTION
+ bfd_get_section_contents
+
+SYNOPSIS
+ 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}
+ into memory starting at @var{location}. The data is read at an
+ offset of @var{offset} from the start of the input section,
+ and is read for @var{count} bytes.
+
+ If the contents of a constructor with the <<SEC_CONSTRUCTOR>>
+ flag set are requested or if the section does not have the
+ <<SEC_HAS_CONTENTS>> flag set, then the @var{location} is filled
+ with zeroes. If no errors occur, <<TRUE>> is returned, else
+ <<FALSE>>.
+
+*/
+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, (size_t) count);
+ return TRUE;
+ }
+
+ 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)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+
+ if (count == 0)
+ /* Don't bother. */
+ return TRUE;
+
+ if ((section->flags & SEC_HAS_CONTENTS) == 0)
+ {
+ memset (location, 0, (size_t) count);
+ return TRUE;
+ }
+
+ if ((section->flags & SEC_IN_MEMORY) != 0)
+ {
+ 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.
+*/
- return false;
+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
+ 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 <<TRUE>> on success, <<FALSE>> on error. Possible error
+ returns are:
+
+ o <<bfd_error_no_memory>> -
+ 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))
+*/
-/*proto* bfd_get_section_contents
-This function reads data from @var{section} in bfd @var{abfd} into
-memory starting at @var{location}. The data is read at an offset of
-@var{offset} from the start of the input section, and is read for
-@var{count} bytes.
+/*
+FUNCTION
+ bfd_generic_is_group_section
-If the contents of a constuctor with the @code{SEC_CONSTUCTOR} flag
-set are requested, then the @var{location} is filled with zeroes.
+SYNOPSIS
+ bfd_boolean bfd_generic_is_group_section (bfd *, const asection *sec);
-If no errors occur, @code{true} is returned, else @code{false}.
-Possible errors are:
+DESCRIPTION
+ Returns TRUE if @var{sec} is a member of a group.
+*/
-@table @code
-@item unknown yet
-@end table
+bfd_boolean
+bfd_generic_is_group_section (bfd *abfd ATTRIBUTE_UNUSED,
+ const asection *sec ATTRIBUTE_UNUSED)
+{
+ return FALSE;
+}
-*; PROTO(boolean, bfd_get_section_contents,
- (bfd *abfd, asection *section, PTR location,
- file_ptr offset, bfd_size_type count));
+/*
+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.
*/
-boolean
-DEFUN(bfd_get_section_contents,(abfd, section, location, offset, count),
- bfd *abfd AND
- sec_ptr section AND
- PTR location AND
- file_ptr offset AND
- bfd_size_type count)
+
+const char *
+bfd_generic_group_name (bfd *abfd ATTRIBUTE_UNUSED,
+ const asection *sec ATTRIBUTE_UNUSED)
{
- if (section->flags & SEC_CONSTRUCTOR)
- {
- memset(location, 0, (unsigned)count);
- return true;
- }
- else
- {
- return (BFD_SEND (abfd, _bfd_get_section_contents,
- (abfd, section, location, offset, count)));
- }
+ 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);
+}
projects / deliverable / binutils-gdb.git / blobdiff