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-/* Object file "section" support for the BFD library.
- Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
- Written by Cygnus Support.
-
-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 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- $Id: section.c,v 1.1 1995/10/18 08:39:53 deraadt Exp $
-*/
-
-/*
-SECTION
- Sections
-
- Sections are supported in BFD in <<section.c>>.
-
- 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.
-
-@menu
-@* Section Input::
-@* Section Output::
-@* typedef asection::
-@* section prototypes::
-@end menu
-
-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 a supernumary section
- <<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 <<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.
-
-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 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 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 (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 --------|
-
-
-SUBSECTION
- Seglets
-
- The data within a section is stored in a <<seglet>>. These
- are much like the fixups in <<gas>>. The seglet abstraction
- allows the a section to grow and shrink within itself.
-
- A seglet knows how big it is, and which is the next seglet and
- where the raw data for it is, and also points to a list of
- relocations which apply to it.
-
- The seglet is used by the linker to perform relaxing on final
- code. The application 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 seglet by seglet basis.
-
-*/
-
-
-#include "bfd.h"
-#include "sysdep.h"
-#include "libbfd.h"
-
-
-/*
-DOCDD
-INODE
-typedef asection, section prototypes, Section Output, Sections
-SUBSECTION
- typedef asection
-
- The shape of a section struct:
-
-CODE_FRAGMENT
-.
-.typedef struct sec
-.{
-. {* The name of the section, the name isn't a copy, the pointer is
-. the same as that passed to bfd_make_section. *}
-.
-. CONST char *name;
-.
-. {* Which section is it 0.nth *}
-.
-. int index;
-.
-. {* The next section in the list belonging to the BFD, or NULL. *}
-.
-. struct sec *next;
-.
-. {* The field flags contains attributes of the section. Some of
-. flags are read in from the object file, and some are
-. synthesized from other information. *}
-.
-. flagword flags;
-.
-.#define SEC_NO_FLAGS 0x000
-.
-. {* Tells the OS to allocate space for this section when loaded.
-. This would clear for a section containing debug information
-. only. *}
-.#define SEC_ALLOC 0x001
-.
-. {* Tells the OS to load the section from the file when loading.
-. This would be clear for a .bss section *}
-.#define SEC_LOAD 0x002
-.
-. {* The section contains data still to be relocated, so there will
-. be some relocation information too. *}
-.#define SEC_RELOC 0x004
-.
-.#if 0 {* Obsolete ? *}
-.#define SEC_BALIGN 0x008
-.#endif
-.
-. {* A signal to the OS that the section contains read only
-. data. *}
-.#define SEC_READONLY 0x010
-.
-. {* The section contains code only. *}
-.#define SEC_CODE 0x020
-.
-. {* The section contains data only. *}
-.#define SEC_DATA 0x040
-.
-. {* The section will reside in ROM. *}
-.#define SEC_ROM 0x080
-.
-. {* The section contains constructor information. This section
-. type is used by the linker to create lists of constructors and
-. destructors used by <<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 <<__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 relocte the data
-. contained within - exactly the operations it would peform on
-. standard data. *}
-.#define SEC_CONSTRUCTOR 0x100
-.
-. {* The section is a constuctor, and should be placed at the
-. end of the text, data, or bss section(?). *}
-.#define SEC_CONSTRUCTOR_TEXT 0x1100
-.#define SEC_CONSTRUCTOR_DATA 0x2100
-.#define SEC_CONSTRUCTOR_BSS 0x3100
-.
-. {* The section has contents - a data section could be
-. <<SEC_ALLOC>> | <<SEC_HAS_CONTENTS>>, a debug section could be
-. <<SEC_HAS_CONTENTS>> *}
-.#define SEC_HAS_CONTENTS 0x200
-.
-. {* An instruction to the linker not to output sections
-. containing this flag even if they have information which
-. would normally be written. *}
-.#define SEC_NEVER_LOAD 0x400
-.
-. {* The section is a shared library section. The linker must leave
-. these completely alone, as the vma and size are used when
-. the executable is loaded. *}
-.#define SEC_SHARED_LIBRARY 0x800
-.
-. {* The section is a common section (symbols may be defined
-. multiple times, the value of a symbol is the amount of
-. space it requires, and the largest symbol value is the one
-. used). Most targets have exactly one of these (which we
-. translate to bfd_com_section), but ECOFF has two. *}
-.#define SEC_IS_COMMON 0x8000
-.
-. {* The section contains only debugging information. For
-. example, this is set for ELF .debug and .stab sections.
-. strip tests this flag to see if a section can be
-. discarded. *}
-.#define SEC_DEBUGGING 0x10000
-.
-. {* End of section flags. *}
-.
-. {* 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;
-. boolean user_set_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 bytes, as it will be output.
-. contains a value even if the section has no contents (eg, the
-. size of <<.bss>>). This will be filled in after relocation *}
-.
-. bfd_size_type _cooked_size;
-.
-. {* The size on disk of the section in bytes originally. Normally this
-. value is the same as the size, but if some relaxing has
-. been done, then this value will be bigger. *}
-.
-. bfd_size_type _raw_size;
-.
-. {* If this section is going to be output, then this value is the
-. offset 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;
-.
-. {* The output section through which to map on output. *}
-.
-. struct sec *output_section;
-.
-. {* The alignment requirement of the section, as an exponent - eg
-. 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 *}
-.
-. PTR userdata;
-.
-. struct lang_output_section *otheruserdata;
-.
-. {* Attached line number information *}
-.
-. alent *lineno;
-.
-. {* Number of line number records *}
-.
-. unsigned int lineno_count;
-.
-. {* 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;
-.
-. {* 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;
-.
-. boolean reloc_done;
-. {* A symbol which points at this section only *}
-. struct symbol_cache_entry *symbol;
-. struct symbol_cache_entry **symbol_ptr_ptr;
-.
-. struct bfd_seclet *seclets_head;
-. struct bfd_seclet *seclets_tail;
-.} asection ;
-.
-.
-. {* These sections are global, and are managed by BFD. The application
-. and target back end are not permitted to change the values in
-. these sections. *}
-.#define BFD_ABS_SECTION_NAME "*ABS*"
-.#define BFD_UND_SECTION_NAME "*UND*"
-.#define BFD_COM_SECTION_NAME "*COM*"
-.#define BFD_IND_SECTION_NAME "*IND*"
-.
-. {* the absolute section *}
-.extern asection bfd_abs_section;
-. {* Pointer to the undefined section *}
-.extern asection bfd_und_section;
-. {* Pointer to the common section *}
-.extern asection bfd_com_section;
-. {* Pointer to the indirect section *}
-.extern asection bfd_ind_section;
-.
-.extern struct symbol_cache_entry *bfd_abs_symbol;
-.extern struct symbol_cache_entry *bfd_com_symbol;
-.extern struct symbol_cache_entry *bfd_und_symbol;
-.extern struct symbol_cache_entry *bfd_ind_symbol;
-.#define bfd_get_section_size_before_reloc(section) \
-. (section->reloc_done ? (abort(),1): (section)->_raw_size)
-.#define bfd_get_section_size_after_reloc(section) \
-. ((section->reloc_done) ? (section)->_cooked_size: (abort(),1))
-*/
-
-/* These symbols are global, not specific to any BFD. Therefore, anything
- that tries to change them is broken, and should be repaired. */
-static CONST asymbol global_syms[] = {
- /* the_bfd, name, value, attr, section [, udata] */
- { 0, BFD_COM_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_com_section },
- { 0, BFD_UND_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_und_section },
- { 0, BFD_ABS_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_abs_section },
- { 0, BFD_IND_SECTION_NAME, 0, BSF_SECTION_SYM, &bfd_ind_section },
-};
-
-#define STD_SECTION(SEC, FLAGS, SYM, NAME, IDX) \
- asymbol *SYM = (asymbol *) &global_syms[IDX]; \
- asection SEC = { NAME, 0, 0, FLAGS, 0, 0, (boolean) 0, 0, 0, 0, &SEC,\
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, (boolean) 0, \
- (asymbol *) &global_syms[IDX], &SYM, }
-
-STD_SECTION (bfd_com_section, SEC_IS_COMMON, bfd_com_symbol, BFD_COM_SECTION_NAME, 0);
-STD_SECTION (bfd_und_section, 0, bfd_und_symbol, BFD_UND_SECTION_NAME, 1);
-STD_SECTION (bfd_abs_section, 0, bfd_abs_symbol, BFD_ABS_SECTION_NAME, 2);
-STD_SECTION (bfd_ind_section, 0, bfd_ind_symbol, BFD_IND_SECTION_NAME, 3);
-#undef STD_SECTION
-
-/*
-DOCDD
-INODE
-section prototypes, , typedef asection, Sections
-SUBSECTION
- section prototypes
-
-These are the functions exported by the section handling part of
-<<libbfd>.
-*/
-
-/*
-FUNCTION
- bfd_get_section_by_name
-
-SYNOPSIS
- asection *bfd_get_section_by_name(bfd *abfd, CONST char *name);
-
-DESCRIPTION
- Runs through the provided @var{abfd} and returns the one of the
- <<asection>>s who's name matches that provided, otherwise NULL.
- @xref{Sections}, for more information.
-
- This should only be used in special cases; the normal way to process
- all sections of a given name is to use bfd_map_over_sections and
- strcmp on the name (or better yet, base it on the section flags
- or something else) for each section.
-*/
-
-asection *
-DEFUN(bfd_get_section_by_name,(abfd, name),
- bfd *abfd AND
- CONST char *name)
-{
- asection *sect;
-
- for (sect = abfd->sections; sect != NULL; sect = sect->next)
- if (!strcmp (sect->name, name)) return sect;
- return NULL;
-}
-
-
-/*
-FUNCTION
- bfd_make_section_old_way
-
-SYNOPSIS
- asection *bfd_make_section_old_way(bfd *, CONST char *name);
-
-DESCRIPTION
- This function creates a new empty section called @var{name}
- and attaches it to the end of the chain of sections for the
- BFD supplied. An attempt to create a section with a name which
- is already in use, returns its pointer without changing the
- section chain.
-
- It has the funny name since this is the way it used to be
- before is was rewritten...
-
- Possible errors are:
- o invalid_operation -
- If output has already started for this BFD.
- o no_memory -
- If obstack alloc fails.
-
-*/
-
-
-asection *
-DEFUN(bfd_make_section_old_way,(abfd, name),
- bfd *abfd AND
- CONST char * name)
-{
- asection *sec = bfd_get_section_by_name(abfd, name);
- if (sec == (asection *)NULL)
- {
- sec = bfd_make_section(abfd, name);
- }
- return sec;
-}
-
-/*
-FUNCTION
- bfd_make_section_anyway
-
-SYNOPSIS
- asection *bfd_make_section_anyway(bfd *, CONST char *name);
-
-DESCRIPTION
- Create a new empty section called @var{name} and attach it to the end of
- the chain of sections for @var{abfd}. Create a new section even if there
- is already a section with that name.
-
- Returns NULL and sets bfd_error on error; possible errors are:
- o invalid_operation - If output has already started for @var{abfd}.
- o no_memory - If obstack alloc fails.
-*/
-
-sec_ptr
-bfd_make_section_anyway (abfd, name)
- bfd *abfd;
- CONST char *name;
-{
- asection *newsect;
- asection **prev = &abfd->sections;
- asection * sect = abfd->sections;
-
- if (abfd->output_has_begun)
- {
- bfd_error = invalid_operation;
- return NULL;
- }
-
- while (sect) {
- prev = &sect->next;
- sect = sect->next;
- }
-
- newsect = (asection *) bfd_zalloc(abfd, sizeof (asection));
- if (newsect == NULL) {
- bfd_error = no_memory;
- return NULL;
- }
-
- 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;
-
- /* 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);
- newsect->symbol->name = name;
- newsect->symbol->value = 0;
- newsect->symbol->section = newsect;
- newsect->symbol->flags = BSF_SECTION_SYM;
-
- newsect->symbol_ptr_ptr = &newsect->symbol;
-
- if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) {
- free (newsect);
- return NULL;
- }
-
- *prev = newsect;
- return newsect;
-}
-
-/*
-FUNCTION
- bfd_make_section
-
-SYNOPSIS
- asection *bfd_make_section(bfd *, CONST char *name);
-
-DESCRIPTION
- Like bfd_make_section_anyway, but return NULL (without setting
- bfd_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.
-*/
-
-sec_ptr
-DEFUN(bfd_make_section,(abfd, name),
- bfd *abfd AND
- CONST char * name)
-{
- asection * sect = abfd->sections;
-
- if (strcmp(name, BFD_ABS_SECTION_NAME) == 0)
- {
- return &bfd_abs_section;
- }
- if (strcmp(name, BFD_COM_SECTION_NAME) == 0)
- {
- return &bfd_com_section;
- }
- if (strcmp(name, BFD_UND_SECTION_NAME) == 0)
- {
- return &bfd_und_section;
- }
-
- if (strcmp(name, BFD_IND_SECTION_NAME) == 0)
- {
- return &bfd_ind_section;
- }
-
- while (sect) {
- if (!strcmp(sect->name, name)) return NULL;
- sect = sect->next;
- }
-
- /* The name is not already used; go ahead and make a new section. */
- return bfd_make_section_anyway (abfd, name);
-}
-
-
-/*
-FUNCTION
- bfd_set_section_flags
-
-SYNOPSIS
- boolean bfd_set_section_flags(bfd *, asection *, flagword);
-
-DESCRIPTION
- 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:
-
- o 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.
-
-*/
-
-boolean
-DEFUN(bfd_set_section_flags,(abfd, section, flags),
- bfd *abfd AND
- sec_ptr section AND
- 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_error = invalid_operation;
- return false;
- }
-#endif
-
- section->flags = flags;
- return true;
-}
-
-
-/*
-FUNCTION
- bfd_map_over_sections
-
-SYNOPSIS
- void bfd_map_over_sections(bfd *abfd,
- void (*func)(bfd *abfd,
- asection *sect,
- PTR obj),
- PTR obj);
-
-DESCRIPTION
- Calls 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 prefered method for iterating over sections, an
- alternative would be to use a loop:
-
-| section *p;
-| for (p = abfd->sections; p != NULL; p = p->next)
-| func(abfd, p, ...)
-
-
-*/
-
-/*VARARGS2*/
-void
-DEFUN(bfd_map_over_sections,(abfd, operation, user_storage),
- bfd *abfd AND
- void (*operation) PARAMS ((bfd *abfd, asection *sect, PTR obj)) AND
- PTR 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();
-}
-
-
-/*
-FUNCTION
- bfd_set_section_size
-
-SYNOPSIS
- boolean bfd_set_section_size(bfd *, asection *, bfd_size_type val);
-
-DESCRIPTION
- Sets @var{section} to the size @var{val}. If the operation is
- ok, then <<true>> is returned, else <<false>>.
-
- Possible error returns:
- o invalid_operation -
- Writing has started to the BFD, so setting the size is invalid
-
-*/
-
-boolean
-DEFUN(bfd_set_section_size,(abfd, ptr, val),
- bfd *abfd AND
- sec_ptr ptr AND
- bfd_size_type val)
-{
- /* Once you've started writing to any section you cannot create or change
- the size of any others. */
-
- if (abfd->output_has_begun) {
- bfd_error = invalid_operation;
- return false;
- }
-
- ptr->_cooked_size = val;
- ptr->_raw_size = val;
-
- return true;
-}
-
-/*
-FUNCTION
- bfd_set_section_contents
-
-SYNOPSIS
- boolean bfd_set_section_contents
- (bfd *abfd,
- asection *section,
- PTR data,
- file_ptr offset,
- bfd_size_type count);
-
-
-DESCRIPTION
- Sets the contents of the section @var{section} in BFD
- @var{abfd} to the data starting in memory at @var{data}. The
- data is written to the output section starting at offset
- @var{offset} for @var{count} bytes.
-
-
-
- Normally <<true>> is returned, else <<false>>. Possible error
- returns are:
- o no_contents -
- The output section does not have the <<SEC_HAS_CONTENTS>>
- attribute, so nothing can be written to it.
- 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
-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_size_type sz;
-
- if (!bfd_get_section_flags(abfd, section) & SEC_HAS_CONTENTS)
- {
- bfd_error = no_contents;
- return(false);
- }
-
- if (offset < 0)
- {
- bad_val:
- bfd_error = bad_value;
- return false;
- }
- sz = bfd_get_section_size_now (abfd, section);
- if (offset > sz
- || count > sz
- || offset + count > sz)
- goto bad_val;
-
- switch (abfd->direction)
- {
- case read_direction:
- case no_direction:
- 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;
- }
-
- if (BFD_SEND (abfd, _bfd_set_section_contents,
- (abfd, section, location, offset, count)))
- {
- abfd->output_has_begun = true;
- return true;
- }
-
- return false;
-}
-
-/*
-FUNCTION
- bfd_get_section_contents
-
-SYNOPSIS
- boolean bfd_get_section_contents
- (bfd *abfd, asection *section, PTR location,
- file_ptr offset, bfd_size_type count);
-
-DESCRIPTION
- 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.
-
- If the contents of a constuctor with the <<SEC_CONSTUCTOR>>
- flag set are requested, then the @var{location} is filled with
- zeroes. If no errors occur, <<true>> is returned, else
- <<false>>.
-
-
-
-*/
-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)
-{
- bfd_size_type sz;
-
- if (section->flags & SEC_CONSTRUCTOR)
- {
- memset(location, 0, (unsigned)count);
- return true;
- }
-
- if (offset < 0)
- {
- bad_val:
- bfd_error = bad_value;
- return false;
- }
- sz = bfd_get_section_size_now (abfd, section);
- if (offset > sz
- || count > sz
- || offset + count > sz)
- goto bad_val;
-
- if (count == 0)
- /* Don't bother. */
- return true;
-
- return BFD_SEND (abfd, _bfd_get_section_contents,
- (abfd, section, location, offset, count));
-}