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Retro68/binutils/bfd/bfd.c
Wolfgang Thaller 65c83606fb Update gcc to 7.2.0, binutils to 2.29, newlib to 2.5.0
2017-10-07 02:16:47 +02:00

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/* Generic BFD library interface and support routines.
Copyright (C) 1990-2017 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 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. */
/*
INODE
typedef bfd, Error reporting, BFD front end, BFD front end
SECTION
<<typedef bfd>>
A BFD has type <<bfd>>; objects of this type are the
cornerstone of any application using BFD. Using BFD
consists of making references though the BFD and to data in the BFD.
Here is the structure that defines the type <<bfd>>. It
contains the major data about the file and pointers
to the rest of the data.
CODE_FRAGMENT
.
.enum bfd_direction
. {
. no_direction = 0,
. read_direction = 1,
. write_direction = 2,
. both_direction = 3
. };
.
.enum bfd_plugin_format
. {
. bfd_plugin_unknown = 0,
. bfd_plugin_yes = 1,
. bfd_plugin_no = 2
. };
.
.struct bfd_build_id
. {
. bfd_size_type size;
. bfd_byte data[1];
. };
.
.struct bfd
.{
. {* The filename the application opened the BFD with. *}
. const char *filename;
.
. {* A pointer to the target jump table. *}
. const struct bfd_target *xvec;
.
. {* The IOSTREAM, and corresponding IO vector that provide access
. to the file backing the BFD. *}
. void *iostream;
. const struct bfd_iovec *iovec;
.
. {* The caching routines use these to maintain a
. least-recently-used list of BFDs. *}
. struct bfd *lru_prev, *lru_next;
.
. {* When a file is closed by the caching routines, BFD retains
. state information on the file here... *}
. ufile_ptr where;
.
. {* File modified time, if mtime_set is TRUE. *}
. long mtime;
.
. {* A unique identifier of the BFD *}
. unsigned int id;
.
. {* The format which belongs to the BFD. (object, core, etc.) *}
. ENUM_BITFIELD (bfd_format) format : 3;
.
. {* The direction with which the BFD was opened. *}
. ENUM_BITFIELD (bfd_direction) direction : 2;
.
. {* Format_specific flags. *}
. flagword flags : 20;
.
. {* Values that may appear in the flags field of a BFD. These also
. appear in the object_flags field of the bfd_target structure, where
. they indicate the set of flags used by that backend (not all flags
. are meaningful for all object file formats) (FIXME: at the moment,
. the object_flags values have mostly just been copied from backend
. to another, and are not necessarily correct). *}
.
.#define BFD_NO_FLAGS 0x00
.
. {* BFD contains relocation entries. *}
.#define HAS_RELOC 0x01
.
. {* BFD is directly executable. *}
.#define EXEC_P 0x02
.
. {* BFD has line number information (basically used for F_LNNO in a
. COFF header). *}
.#define HAS_LINENO 0x04
.
. {* BFD has debugging information. *}
.#define HAS_DEBUG 0x08
.
. {* BFD has symbols. *}
.#define HAS_SYMS 0x10
.
. {* BFD has local symbols (basically used for F_LSYMS in a COFF
. header). *}
.#define HAS_LOCALS 0x20
.
. {* BFD is a dynamic object. *}
.#define DYNAMIC 0x40
.
. {* Text section is write protected (if D_PAGED is not set, this is
. like an a.out NMAGIC file) (the linker sets this by default, but
. clears it for -r or -N). *}
.#define WP_TEXT 0x80
.
. {* BFD is dynamically paged (this is like an a.out ZMAGIC file) (the
. linker sets this by default, but clears it for -r or -n or -N). *}
.#define D_PAGED 0x100
.
. {* BFD is relaxable (this means that bfd_relax_section may be able to
. do something) (sometimes bfd_relax_section can do something even if
. this is not set). *}
.#define BFD_IS_RELAXABLE 0x200
.
. {* This may be set before writing out a BFD to request using a
. traditional format. For example, this is used to request that when
. writing out an a.out object the symbols not be hashed to eliminate
. duplicates. *}
.#define BFD_TRADITIONAL_FORMAT 0x400
.
. {* This flag indicates that the BFD contents are actually cached
. in memory. If this is set, iostream points to a bfd_in_memory
. struct. *}
.#define BFD_IN_MEMORY 0x800
.
. {* This BFD has been created by the linker and doesn't correspond
. to any input file. *}
.#define BFD_LINKER_CREATED 0x1000
.
. {* This may be set before writing out a BFD to request that it
. be written using values for UIDs, GIDs, timestamps, etc. that
. will be consistent from run to run. *}
.#define BFD_DETERMINISTIC_OUTPUT 0x2000
.
. {* Compress sections in this BFD. *}
.#define BFD_COMPRESS 0x4000
.
. {* Decompress sections in this BFD. *}
.#define BFD_DECOMPRESS 0x8000
.
. {* BFD is a dummy, for plugins. *}
.#define BFD_PLUGIN 0x10000
.
. {* Compress sections in this BFD with SHF_COMPRESSED from gABI. *}
.#define BFD_COMPRESS_GABI 0x20000
.
. {* Convert ELF common symbol type to STT_COMMON or STT_OBJECT in this
. BFD. *}
.#define BFD_CONVERT_ELF_COMMON 0x40000
.
. {* Use the ELF STT_COMMON type in this BFD. *}
.#define BFD_USE_ELF_STT_COMMON 0x80000
.
. {* Flags bits to be saved in bfd_preserve_save. *}
.#define BFD_FLAGS_SAVED \
. (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
. | BFD_PLUGIN | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON \
. | BFD_USE_ELF_STT_COMMON)
.
. {* Flags bits which are for BFD use only. *}
.#define BFD_FLAGS_FOR_BFD_USE_MASK \
. (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
. | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT \
. | BFD_COMPRESS_GABI | BFD_CONVERT_ELF_COMMON | BFD_USE_ELF_STT_COMMON)
.
. {* Is the file descriptor being cached? That is, can it be closed as
. needed, and re-opened when accessed later? *}
. unsigned int cacheable : 1;
.
. {* Marks whether there was a default target specified when the
. BFD was opened. This is used to select which matching algorithm
. to use to choose the back end. *}
. unsigned int target_defaulted : 1;
.
. {* ... and here: (``once'' means at least once). *}
. unsigned int opened_once : 1;
.
. {* Set if we have a locally maintained mtime value, rather than
. getting it from the file each time. *}
. unsigned int mtime_set : 1;
.
. {* Flag set if symbols from this BFD should not be exported. *}
. unsigned int no_export : 1;
.
. {* Remember when output has begun, to stop strange things
. from happening. *}
. unsigned int output_has_begun : 1;
.
. {* Have archive map. *}
. unsigned int has_armap : 1;
.
. {* Set if this is a thin archive. *}
. unsigned int is_thin_archive : 1;
.
. {* Set if only required symbols should be added in the link hash table for
. this object. Used by VMS linkers. *}
. unsigned int selective_search : 1;
.
. {* Set if this is the linker output BFD. *}
. unsigned int is_linker_output : 1;
.
. {* Set if this is the linker input BFD. *}
. unsigned int is_linker_input : 1;
.
. {* If this is an input for a compiler plug-in library. *}
. ENUM_BITFIELD (bfd_plugin_format) plugin_format : 2;
.
. {* Set if this is a plugin output file. *}
. unsigned int lto_output : 1;
.
. {* Set to dummy BFD created when claimed by a compiler plug-in
. library. *}
. bfd *plugin_dummy_bfd;
.
. {* Currently my_archive is tested before adding origin to
. anything. I believe that this can become always an add of
. origin, with origin set to 0 for non archive files. *}
. ufile_ptr origin;
.
. {* The origin in the archive of the proxy entry. This will
. normally be the same as origin, except for thin archives,
. when it will contain the current offset of the proxy in the
. thin archive rather than the offset of the bfd in its actual
. container. *}
. ufile_ptr proxy_origin;
.
. {* A hash table for section names. *}
. struct bfd_hash_table section_htab;
.
. {* Pointer to linked list of sections. *}
. struct bfd_section *sections;
.
. {* The last section on the section list. *}
. struct bfd_section *section_last;
.
. {* The number of sections. *}
. unsigned int section_count;
.
. {* A field used by _bfd_generic_link_add_archive_symbols. This will
. be used only for archive elements. *}
. int archive_pass;
.
. {* Stuff only useful for object files:
. The start address. *}
. bfd_vma start_address;
.
. {* Symbol table for output BFD (with symcount entries).
. Also used by the linker to cache input BFD symbols. *}
. struct bfd_symbol **outsymbols;
.
. {* Used for input and output. *}
. unsigned int symcount;
.
. {* Used for slurped dynamic symbol tables. *}
. unsigned int dynsymcount;
.
. {* Pointer to structure which contains architecture information. *}
. const struct bfd_arch_info *arch_info;
.
. {* Stuff only useful for archives. *}
. void *arelt_data;
. struct bfd *my_archive; {* The containing archive BFD. *}
. struct bfd *archive_next; {* The next BFD in the archive. *}
. struct bfd *archive_head; {* The first BFD in the archive. *}
. struct bfd *nested_archives; {* List of nested archive in a flattened
. thin archive. *}
.
. union {
. {* For input BFDs, a chain of BFDs involved in a link. *}
. struct bfd *next;
. {* For output BFD, the linker hash table. *}
. struct bfd_link_hash_table *hash;
. } link;
.
. {* Used by the back end to hold private data. *}
. union
. {
. struct aout_data_struct *aout_data;
. struct artdata *aout_ar_data;
. struct _oasys_data *oasys_obj_data;
. struct _oasys_ar_data *oasys_ar_data;
. struct coff_tdata *coff_obj_data;
. struct pe_tdata *pe_obj_data;
. struct xcoff_tdata *xcoff_obj_data;
. struct ecoff_tdata *ecoff_obj_data;
. struct ieee_data_struct *ieee_data;
. struct ieee_ar_data_struct *ieee_ar_data;
. struct srec_data_struct *srec_data;
. struct verilog_data_struct *verilog_data;
. struct ihex_data_struct *ihex_data;
. struct tekhex_data_struct *tekhex_data;
. struct elf_obj_tdata *elf_obj_data;
. struct nlm_obj_tdata *nlm_obj_data;
. struct bout_data_struct *bout_data;
. struct mmo_data_struct *mmo_data;
. struct sun_core_struct *sun_core_data;
. struct sco5_core_struct *sco5_core_data;
. struct trad_core_struct *trad_core_data;
. struct som_data_struct *som_data;
. struct hpux_core_struct *hpux_core_data;
. struct hppabsd_core_struct *hppabsd_core_data;
. struct sgi_core_struct *sgi_core_data;
. struct lynx_core_struct *lynx_core_data;
. struct osf_core_struct *osf_core_data;
. struct cisco_core_struct *cisco_core_data;
. struct versados_data_struct *versados_data;
. struct netbsd_core_struct *netbsd_core_data;
. struct mach_o_data_struct *mach_o_data;
. struct mach_o_fat_data_struct *mach_o_fat_data;
. struct plugin_data_struct *plugin_data;
. struct bfd_pef_data_struct *pef_data;
. struct bfd_pef_xlib_data_struct *pef_xlib_data;
. struct bfd_sym_data_struct *sym_data;
. void *any;
. }
. tdata;
.
. {* Used by the application to hold private data. *}
. void *usrdata;
.
. {* Where all the allocated stuff under this BFD goes. This is a
. struct objalloc *, but we use void * to avoid requiring the inclusion
. of objalloc.h. *}
. void *memory;
.
. {* For input BFDs, the build ID, if the object has one. *}
. const struct bfd_build_id *build_id;
.};
.
.{* See note beside bfd_set_section_userdata. *}
.static inline bfd_boolean
.bfd_set_cacheable (bfd * abfd, bfd_boolean val)
.{
. abfd->cacheable = val;
. return TRUE;
.}
.
*/
#include "sysdep.h"
#include <stdarg.h>
#include "bfd.h"
#include "bfdver.h"
#include "libiberty.h"
#include "demangle.h"
#include "safe-ctype.h"
#include "bfdlink.h"
#include "libbfd.h"
#include "coff/internal.h"
#include "coff/sym.h"
#include "libcoff.h"
#include "libecoff.h"
#undef obj_symbols
#include "elf-bfd.h"
#ifndef EXIT_FAILURE
#define EXIT_FAILURE 1
#endif
/* provide storage for subsystem, stack and heap data which may have been
passed in on the command line. Ld puts this data into a bfd_link_info
struct which ultimately gets passed in to the bfd. When it arrives, copy
it to the following struct so that the data will be available in coffcode.h
where it is needed. The typedef's used are defined in bfd.h */
/*
INODE
Error reporting, Miscellaneous, typedef bfd, BFD front end
SECTION
Error reporting
Most BFD functions return nonzero on success (check their
individual documentation for precise semantics). On an error,
they call <<bfd_set_error>> to set an error condition that callers
can check by calling <<bfd_get_error>>.
If that returns <<bfd_error_system_call>>, then check
<<errno>>.
The easiest way to report a BFD error to the user is to
use <<bfd_perror>>.
SUBSECTION
Type <<bfd_error_type>>
The values returned by <<bfd_get_error>> are defined by the
enumerated type <<bfd_error_type>>.
CODE_FRAGMENT
.
.typedef enum bfd_error
.{
. bfd_error_no_error = 0,
. bfd_error_system_call,
. bfd_error_invalid_target,
. bfd_error_wrong_format,
. bfd_error_wrong_object_format,
. bfd_error_invalid_operation,
. bfd_error_no_memory,
. bfd_error_no_symbols,
. bfd_error_no_armap,
. bfd_error_no_more_archived_files,
. bfd_error_malformed_archive,
. bfd_error_missing_dso,
. bfd_error_file_not_recognized,
. bfd_error_file_ambiguously_recognized,
. bfd_error_no_contents,
. bfd_error_nonrepresentable_section,
. bfd_error_no_debug_section,
. bfd_error_bad_value,
. bfd_error_file_truncated,
. bfd_error_file_too_big,
. bfd_error_on_input,
. bfd_error_invalid_error_code
.}
.bfd_error_type;
.
*/
static bfd_error_type bfd_error = bfd_error_no_error;
static bfd *input_bfd = NULL;
static bfd_error_type input_error = bfd_error_no_error;
const char *const bfd_errmsgs[] =
{
N_("No error"),
N_("System call error"),
N_("Invalid bfd target"),
N_("File in wrong format"),
N_("Archive object file in wrong format"),
N_("Invalid operation"),
N_("Memory exhausted"),
N_("No symbols"),
N_("Archive has no index; run ranlib to add one"),
N_("No more archived files"),
N_("Malformed archive"),
N_("DSO missing from command line"),
N_("File format not recognized"),
N_("File format is ambiguous"),
N_("Section has no contents"),
N_("Nonrepresentable section on output"),
N_("Symbol needs debug section which does not exist"),
N_("Bad value"),
N_("File truncated"),
N_("File too big"),
N_("Error reading %s: %s"),
N_("#<Invalid error code>")
};
/*
FUNCTION
bfd_get_error
SYNOPSIS
bfd_error_type bfd_get_error (void);
DESCRIPTION
Return the current BFD error condition.
*/
bfd_error_type
bfd_get_error (void)
{
return bfd_error;
}
/*
FUNCTION
bfd_set_error
SYNOPSIS
void bfd_set_error (bfd_error_type error_tag, ...);
DESCRIPTION
Set the BFD error condition to be @var{error_tag}.
If @var{error_tag} is bfd_error_on_input, then this function
takes two more parameters, the input bfd where the error
occurred, and the bfd_error_type error.
*/
void
bfd_set_error (bfd_error_type error_tag, ...)
{
bfd_error = error_tag;
if (error_tag == bfd_error_on_input)
{
/* This is an error that occurred during bfd_close when
writing an archive, but on one of the input files. */
va_list ap;
va_start (ap, error_tag);
input_bfd = va_arg (ap, bfd *);
input_error = (bfd_error_type) va_arg (ap, int);
if (input_error >= bfd_error_on_input)
abort ();
va_end (ap);
}
}
/*
FUNCTION
bfd_errmsg
SYNOPSIS
const char *bfd_errmsg (bfd_error_type error_tag);
DESCRIPTION
Return a string describing the error @var{error_tag}, or
the system error if @var{error_tag} is <<bfd_error_system_call>>.
*/
const char *
bfd_errmsg (bfd_error_type error_tag)
{
#ifndef errno
extern int errno;
#endif
if (error_tag == bfd_error_on_input)
{
char *buf;
const char *msg = bfd_errmsg (input_error);
if (asprintf (&buf, _(bfd_errmsgs [error_tag]), input_bfd->filename, msg)
!= -1)
return buf;
/* Ick, what to do on out of memory? */
return msg;
}
if (error_tag == bfd_error_system_call)
return xstrerror (errno);
if (error_tag > bfd_error_invalid_error_code)
error_tag = bfd_error_invalid_error_code; /* sanity check */
return _(bfd_errmsgs [error_tag]);
}
/*
FUNCTION
bfd_perror
SYNOPSIS
void bfd_perror (const char *message);
DESCRIPTION
Print to the standard error stream a string describing the
last BFD error that occurred, or the last system error if
the last BFD error was a system call failure. If @var{message}
is non-NULL and non-empty, the error string printed is preceded
by @var{message}, a colon, and a space. It is followed by a newline.
*/
void
bfd_perror (const char *message)
{
fflush (stdout);
if (message == NULL || *message == '\0')
fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
else
fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
fflush (stderr);
}
/*
SUBSECTION
BFD error handler
Some BFD functions want to print messages describing the
problem. They call a BFD error handler function. This
function may be overridden by the program.
The BFD error handler acts like vprintf.
CODE_FRAGMENT
.
.typedef void (*bfd_error_handler_type) (const char *, va_list);
.
*/
/* The program name used when printing BFD error messages. */
static const char *_bfd_error_program_name;
/* This macro and _doprnt taken from libiberty _doprnt.c, tidied a
little and extended to handle '%A' and '%B'. 'L' as a modifer for
integer formats is used for bfd_vma and bfd_size_type args, which
vary in size depending on BFD configuration. */
#define PRINT_TYPE(TYPE) \
do \
{ \
TYPE value = va_arg (ap, TYPE); \
result = fprintf (stream, specifier, value); \
} while (0)
static int
_doprnt (FILE *stream, const char *format, va_list ap)
{
const char *ptr = format;
char specifier[128];
int total_printed = 0;
while (*ptr != '\0')
{
int result;
if (*ptr != '%')
{
/* While we have regular characters, print them. */
char *end = strchr (ptr, '%');
if (end != NULL)
result = fprintf (stream, "%.*s", (int) (end - ptr), ptr);
else
result = fprintf (stream, "%s", ptr);
ptr += result;
}
else
{
/* We have a format specifier! */
char *sptr = specifier;
int wide_width = 0, short_width = 0;
/* Copy the % and move forward. */
*sptr++ = *ptr++;
/* Move past flags. */
while (strchr ("-+ #0", *ptr))
*sptr++ = *ptr++;
if (*ptr == '*')
{
int value = abs (va_arg (ap, int));
sptr += sprintf (sptr, "%d", value);
ptr++;
}
else
/* Handle explicit numeric value. */
while (ISDIGIT (*ptr))
*sptr++ = *ptr++;
if (*ptr == '.')
{
/* Copy and go past the period. */
*sptr++ = *ptr++;
if (*ptr == '*')
{
int value = abs (va_arg (ap, int));
sptr += sprintf (sptr, "%d", value);
ptr++;
}
else
/* Handle explicit numeric value. */
while (ISDIGIT (*ptr))
*sptr++ = *ptr++;
}
while (strchr ("hlL", *ptr))
{
switch (*ptr)
{
case 'h':
short_width = 1;
break;
case 'l':
wide_width++;
break;
case 'L':
wide_width = 2;
break;
default:
abort();
}
*sptr++ = *ptr++;
}
/* Copy the type specifier, and NULL terminate. */
*sptr++ = *ptr++;
*sptr = '\0';
switch (ptr[-1])
{
case 'd':
case 'i':
case 'o':
case 'u':
case 'x':
case 'X':
case 'c':
{
/* Short values are promoted to int, so just copy it
as an int and trust the C library printf to cast it
to the right width. */
if (short_width)
PRINT_TYPE (int);
else
{
/* L modifier for bfd_vma or bfd_size_type may be
either long long or long. */
if (sptr[-2] == 'L')
{
sptr[-2] = 'l';
if (BFD_ARCH_SIZE < 64 || BFD_HOST_64BIT_LONG)
wide_width = 1;
else
{
sptr[-1] = 'l';
*sptr++ = ptr[-1];
*sptr = '\0';
}
}
switch (wide_width)
{
case 0:
PRINT_TYPE (int);
break;
case 1:
PRINT_TYPE (long);
break;
case 2:
default:
#if defined (__MSVCRT__)
sptr[-3] = 'I';
sptr[-2] = '6';
sptr[-1] = '4';
*sptr++ = ptr[-1];
*sptr = '\0';
#endif
#if defined (__GNUC__) || defined (HAVE_LONG_LONG)
PRINT_TYPE (long long);
#else
/* Fake it and hope for the best. */
PRINT_TYPE (long);
#endif
break;
}
}
}
break;
case 'f':
case 'e':
case 'E':
case 'g':
case 'G':
{
if (wide_width == 0)
PRINT_TYPE (double);
else
{
#if defined (__GNUC__) || defined (HAVE_LONG_DOUBLE)
PRINT_TYPE (long double);
#else
/* Fake it and hope for the best. */
PRINT_TYPE (double);
#endif
}
}
break;
case 's':
PRINT_TYPE (char *);
break;
case 'p':
PRINT_TYPE (void *);
break;
case '%':
fputc ('%', stream);
result = 1;
break;
case 'A':
{
asection *sec = va_arg (ap, asection *);
bfd *abfd;
const char *group = NULL;
struct coff_comdat_info *ci;
if (sec == NULL)
/* Invoking %A with a null section pointer is an
internal error. */
abort ();
abfd = sec->owner;
if (abfd != NULL
&& bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& elf_next_in_group (sec) != NULL
&& (sec->flags & SEC_GROUP) == 0)
group = elf_group_name (sec);
else if (abfd != NULL
&& bfd_get_flavour (abfd) == bfd_target_coff_flavour
&& (ci = bfd_coff_get_comdat_section (sec->owner,
sec)) != NULL)
group = ci->name;
if (group != NULL)
result = fprintf (stream, "%s[%s]", sec->name, group);
else
result = fprintf (stream, "%s", sec->name);
}
break;
case 'B':
{
bfd *abfd = va_arg (ap, bfd *);
if (abfd == NULL)
/* Invoking %B with a null bfd pointer is an
internal error. */
abort ();
else if (abfd->my_archive
&& !bfd_is_thin_archive (abfd->my_archive))
result = fprintf (stream, "%s(%s)",
abfd->my_archive->filename, abfd->filename);
else
result = fprintf (stream, "%s", abfd->filename);
}
break;
default:
abort();
}
}
if (result == -1)
return -1;
total_printed += result;
}
return total_printed;
}
/* This is the default routine to handle BFD error messages.
Like fprintf (stderr, ...), but also handles some extra format specifiers.
%A section name from section. For group components, print group name too.
%B file name from bfd. For archive components, prints archive too. */
static void
error_handler_internal (const char *fmt, va_list ap)
{
/* PR 4992: Don't interrupt output being sent to stdout. */
fflush (stdout);
if (_bfd_error_program_name != NULL)
fprintf (stderr, "%s: ", _bfd_error_program_name);
else
fprintf (stderr, "BFD: ");
_doprnt (stderr, fmt, ap);
/* On AIX, putc is implemented as a macro that triggers a -Wunused-value
warning, so use the fputc function to avoid it. */
fputc ('\n', stderr);
fflush (stderr);
}
/* This is a function pointer to the routine which should handle BFD
error messages. It is called when a BFD routine encounters an
error for which it wants to print a message. Going through a
function pointer permits a program linked against BFD to intercept
the messages and deal with them itself. */
static bfd_error_handler_type _bfd_error_internal = error_handler_internal;
void
_bfd_error_handler (const char *fmt, ...)
{
va_list ap;
va_start (ap, fmt);
_bfd_error_internal (fmt, ap);
va_end (ap);
}
/*
FUNCTION
bfd_set_error_handler
SYNOPSIS
bfd_error_handler_type bfd_set_error_handler (bfd_error_handler_type);
DESCRIPTION
Set the BFD error handler function. Returns the previous
function.
*/
bfd_error_handler_type
bfd_set_error_handler (bfd_error_handler_type pnew)
{
bfd_error_handler_type pold;
pold = _bfd_error_internal;
_bfd_error_internal = pnew;
return pold;
}
/*
FUNCTION
bfd_set_error_program_name
SYNOPSIS
void bfd_set_error_program_name (const char *);
DESCRIPTION
Set the program name to use when printing a BFD error. This
is printed before the error message followed by a colon and
space. The string must not be changed after it is passed to
this function.
*/
void
bfd_set_error_program_name (const char *name)
{
_bfd_error_program_name = name;
}
/*
SUBSECTION
BFD assert handler
If BFD finds an internal inconsistency, the bfd assert
handler is called with information on the BFD version, BFD
source file and line. If this happens, most programs linked
against BFD are expected to want to exit with an error, or mark
the current BFD operation as failed, so it is recommended to
override the default handler, which just calls
_bfd_error_handler and continues.
CODE_FRAGMENT
.
.typedef void (*bfd_assert_handler_type) (const char *bfd_formatmsg,
. const char *bfd_version,
. const char *bfd_file,
. int bfd_line);
.
*/
/* Note the use of bfd_ prefix on the parameter names above: we want to
show which one is the message and which is the version by naming the
parameters, but avoid polluting the program-using-bfd namespace as
the typedef is visible in the exported headers that the program
includes. Below, it's just for consistency. */
static void
_bfd_default_assert_handler (const char *bfd_formatmsg,
const char *bfd_version,
const char *bfd_file,
int bfd_line)
{
_bfd_error_handler (bfd_formatmsg, bfd_version, bfd_file, bfd_line);
}
/* Similar to _bfd_error_handler, a program can decide to exit on an
internal BFD error. We use a non-variadic type to simplify passing
on parameters to other functions, e.g. _bfd_error_handler. */
static bfd_assert_handler_type _bfd_assert_handler = _bfd_default_assert_handler;
/*
FUNCTION
bfd_set_assert_handler
SYNOPSIS
bfd_assert_handler_type bfd_set_assert_handler (bfd_assert_handler_type);
DESCRIPTION
Set the BFD assert handler function. Returns the previous
function.
*/
bfd_assert_handler_type
bfd_set_assert_handler (bfd_assert_handler_type pnew)
{
bfd_assert_handler_type pold;
pold = _bfd_assert_handler;
_bfd_assert_handler = pnew;
return pold;
}
/*
INODE
Miscellaneous, Memory Usage, Error reporting, BFD front end
SECTION
Miscellaneous
SUBSECTION
Miscellaneous functions
*/
/*
FUNCTION
bfd_get_reloc_upper_bound
SYNOPSIS
long bfd_get_reloc_upper_bound (bfd *abfd, asection *sect);
DESCRIPTION
Return the number of bytes required to store the
relocation information associated with section @var{sect}
attached to bfd @var{abfd}. If an error occurs, return -1.
*/
long
bfd_get_reloc_upper_bound (bfd *abfd, sec_ptr asect)
{
if (abfd->format != bfd_object)
{
bfd_set_error (bfd_error_invalid_operation);
return -1;
}
return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
}
/*
FUNCTION
bfd_canonicalize_reloc
SYNOPSIS
long bfd_canonicalize_reloc
(bfd *abfd, asection *sec, arelent **loc, asymbol **syms);
DESCRIPTION
Call the back end associated with the open BFD
@var{abfd} and translate the external form of the relocation
information attached to @var{sec} into the internal canonical
form. Place the table into memory at @var{loc}, which has
been preallocated, usually by a call to
<<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
-1 on error.
The @var{syms} table is also needed for horrible internal magic
reasons.
*/
long
bfd_canonicalize_reloc (bfd *abfd,
sec_ptr asect,
arelent **location,
asymbol **symbols)
{
if (abfd->format != bfd_object)
{
bfd_set_error (bfd_error_invalid_operation);
return -1;
}
return BFD_SEND (abfd, _bfd_canonicalize_reloc,
(abfd, asect, location, symbols));
}
/*
FUNCTION
bfd_set_reloc
SYNOPSIS
void bfd_set_reloc
(bfd *abfd, asection *sec, arelent **rel, unsigned int count);
DESCRIPTION
Set the relocation pointer and count within
section @var{sec} to the values @var{rel} and @var{count}.
The argument @var{abfd} is ignored.
.#define bfd_set_reloc(abfd, asect, location, count) \
. BFD_SEND (abfd, _bfd_set_reloc, (abfd, asect, location, count))
*/
/*
FUNCTION
bfd_set_file_flags
SYNOPSIS
bfd_boolean bfd_set_file_flags (bfd *abfd, flagword flags);
DESCRIPTION
Set the flag word in the BFD @var{abfd} to the value @var{flags}.
Possible errors are:
o <<bfd_error_wrong_format>> - The target bfd was not of object format.
o <<bfd_error_invalid_operation>> - The target bfd was open for reading.
o <<bfd_error_invalid_operation>> -
The flag word contained a bit which was not applicable to the
type of file. E.g., an attempt was made to set the <<D_PAGED>> bit
on a BFD format which does not support demand paging.
*/
bfd_boolean
bfd_set_file_flags (bfd *abfd, flagword flags)
{
if (abfd->format != bfd_object)
{
bfd_set_error (bfd_error_wrong_format);
return FALSE;
}
if (bfd_read_p (abfd))
{
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
}
bfd_get_file_flags (abfd) = flags;
if ((flags & bfd_applicable_file_flags (abfd)) != flags)
{
bfd_set_error (bfd_error_invalid_operation);
return FALSE;
}
return TRUE;
}
void
bfd_assert (const char *file, int line)
{
/* xgettext:c-format */
(*_bfd_assert_handler) (_("BFD %s assertion fail %s:%d"),
BFD_VERSION_STRING, file, line);
}
/* A more or less friendly abort message. In libbfd.h abort is
defined to call this function. */
void
_bfd_abort (const char *file, int line, const char *fn)
{
if (fn != NULL)
_bfd_error_handler
/* xgettext:c-format */
(_("BFD %s internal error, aborting at %s:%d in %s\n"),
BFD_VERSION_STRING, file, line, fn);
else
_bfd_error_handler
/* xgettext:c-format */
(_("BFD %s internal error, aborting at %s:%d\n"),
BFD_VERSION_STRING, file, line);
_bfd_error_handler (_("Please report this bug.\n"));
_exit (EXIT_FAILURE);
}
/*
FUNCTION
bfd_get_arch_size
SYNOPSIS
int bfd_get_arch_size (bfd *abfd);
DESCRIPTION
Returns the normalized architecture address size, in bits, as
determined by the object file's format. By normalized, we mean
either 32 or 64. For ELF, this information is included in the
header. Use bfd_arch_bits_per_address for number of bits in
the architecture address.
RETURNS
Returns the arch size in bits if known, <<-1>> otherwise.
*/
int
bfd_get_arch_size (bfd *abfd)
{
if (abfd->xvec->flavour == bfd_target_elf_flavour)
return get_elf_backend_data (abfd)->s->arch_size;
return bfd_arch_bits_per_address (abfd) > 32 ? 64 : 32;
}
/*
FUNCTION
bfd_get_sign_extend_vma
SYNOPSIS
int bfd_get_sign_extend_vma (bfd *abfd);
DESCRIPTION
Indicates if the target architecture "naturally" sign extends
an address. Some architectures implicitly sign extend address
values when they are converted to types larger than the size
of an address. For instance, bfd_get_start_address() will
return an address sign extended to fill a bfd_vma when this is
the case.
RETURNS
Returns <<1>> if the target architecture is known to sign
extend addresses, <<0>> if the target architecture is known to
not sign extend addresses, and <<-1>> otherwise.
*/
int
bfd_get_sign_extend_vma (bfd *abfd)
{
char *name;
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
return get_elf_backend_data (abfd)->sign_extend_vma;
name = bfd_get_target (abfd);
/* Return a proper value for DJGPP & PE COFF.
This function is required for DWARF2 support, but there is
no place to store this information in the COFF back end.
Should enough other COFF targets add support for DWARF2,
a place will have to be found. Until then, this hack will do. */
if (CONST_STRNEQ (name, "coff-go32")
|| strcmp (name, "pe-i386") == 0
|| strcmp (name, "pei-i386") == 0
|| strcmp (name, "pe-x86-64") == 0
|| strcmp (name, "pei-x86-64") == 0
|| strcmp (name, "pe-arm-wince-little") == 0
|| strcmp (name, "pei-arm-wince-little") == 0
|| strcmp (name, "aixcoff-rs6000") == 0)
return 1;
if (CONST_STRNEQ (name, "mach-o"))
return 0;
bfd_set_error (bfd_error_wrong_format);
return -1;
}
/*
FUNCTION
bfd_set_start_address
SYNOPSIS
bfd_boolean bfd_set_start_address (bfd *abfd, bfd_vma vma);
DESCRIPTION
Make @var{vma} the entry point of output BFD @var{abfd}.
RETURNS
Returns <<TRUE>> on success, <<FALSE>> otherwise.
*/
bfd_boolean
bfd_set_start_address (bfd *abfd, bfd_vma vma)
{
abfd->start_address = vma;
return TRUE;
}
/*
FUNCTION
bfd_get_gp_size
SYNOPSIS
unsigned int bfd_get_gp_size (bfd *abfd);
DESCRIPTION
Return the maximum size of objects to be optimized using the GP
register under MIPS ECOFF. This is typically set by the <<-G>>
argument to the compiler, assembler or linker.
*/
unsigned int
bfd_get_gp_size (bfd *abfd)
{
if (abfd->format == bfd_object)
{
if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
return ecoff_data (abfd)->gp_size;
else if (abfd->xvec->flavour == bfd_target_elf_flavour)
return elf_gp_size (abfd);
}
return 0;
}
/*
FUNCTION
bfd_set_gp_size
SYNOPSIS
void bfd_set_gp_size (bfd *abfd, unsigned int i);
DESCRIPTION
Set the maximum size of objects to be optimized using the GP
register under ECOFF or MIPS ELF. This is typically set by
the <<-G>> argument to the compiler, assembler or linker.
*/
void
bfd_set_gp_size (bfd *abfd, unsigned int i)
{
/* Don't try to set GP size on an archive or core file! */
if (abfd->format != bfd_object)
return;
if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
ecoff_data (abfd)->gp_size = i;
else if (abfd->xvec->flavour == bfd_target_elf_flavour)
elf_gp_size (abfd) = i;
}
/* Get the GP value. This is an internal function used by some of the
relocation special_function routines on targets which support a GP
register. */
bfd_vma
_bfd_get_gp_value (bfd *abfd)
{
if (! abfd)
return 0;
if (abfd->format != bfd_object)
return 0;
if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
return ecoff_data (abfd)->gp;
else if (abfd->xvec->flavour == bfd_target_elf_flavour)
return elf_gp (abfd);
return 0;
}
/* Set the GP value. */
void
_bfd_set_gp_value (bfd *abfd, bfd_vma v)
{
if (! abfd)
abort ();
if (abfd->format != bfd_object)
return;
if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
ecoff_data (abfd)->gp = v;
else if (abfd->xvec->flavour == bfd_target_elf_flavour)
elf_gp (abfd) = v;
}
/*
FUNCTION
bfd_scan_vma
SYNOPSIS
bfd_vma bfd_scan_vma (const char *string, const char **end, int base);
DESCRIPTION
Convert, like <<strtoul>>, a numerical expression
@var{string} into a <<bfd_vma>> integer, and return that integer.
(Though without as many bells and whistles as <<strtoul>>.)
The expression is assumed to be unsigned (i.e., positive).
If given a @var{base}, it is used as the base for conversion.
A base of 0 causes the function to interpret the string
in hex if a leading "0x" or "0X" is found, otherwise
in octal if a leading zero is found, otherwise in decimal.
If the value would overflow, the maximum <<bfd_vma>> value is
returned.
*/
bfd_vma
bfd_scan_vma (const char *string, const char **end, int base)
{
bfd_vma value;
bfd_vma cutoff;
unsigned int cutlim;
int overflow;
/* Let the host do it if possible. */
if (sizeof (bfd_vma) <= sizeof (unsigned long))
return strtoul (string, (char **) end, base);
#if defined (HAVE_STRTOULL) && defined (HAVE_LONG_LONG)
if (sizeof (bfd_vma) <= sizeof (unsigned long long))
return strtoull (string, (char **) end, base);
#endif
if (base == 0)
{
if (string[0] == '0')
{
if ((string[1] == 'x') || (string[1] == 'X'))
base = 16;
else
base = 8;
}
}
if ((base < 2) || (base > 36))
base = 10;
if (base == 16
&& string[0] == '0'
&& (string[1] == 'x' || string[1] == 'X')
&& ISXDIGIT (string[2]))
{
string += 2;
}
cutoff = (~ (bfd_vma) 0) / (bfd_vma) base;
cutlim = (~ (bfd_vma) 0) % (bfd_vma) base;
value = 0;
overflow = 0;
while (1)
{
unsigned int digit;
digit = *string;
if (ISDIGIT (digit))
digit = digit - '0';
else if (ISALPHA (digit))
digit = TOUPPER (digit) - 'A' + 10;
else
break;
if (digit >= (unsigned int) base)
break;
if (value > cutoff || (value == cutoff && digit > cutlim))
overflow = 1;
value = value * base + digit;
++string;
}
if (overflow)
value = ~ (bfd_vma) 0;
if (end != NULL)
*end = string;
return value;
}
/*
FUNCTION
bfd_copy_private_header_data
SYNOPSIS
bfd_boolean bfd_copy_private_header_data (bfd *ibfd, bfd *obfd);
DESCRIPTION
Copy private BFD header information from the BFD @var{ibfd} to the
the BFD @var{obfd}. This copies information that may require
sections to exist, but does not require symbol tables. 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{obfd}.
.#define bfd_copy_private_header_data(ibfd, obfd) \
. BFD_SEND (obfd, _bfd_copy_private_header_data, \
. (ibfd, obfd))
*/
/*
FUNCTION
bfd_copy_private_bfd_data
SYNOPSIS
bfd_boolean bfd_copy_private_bfd_data (bfd *ibfd, bfd *obfd);
DESCRIPTION
Copy private BFD information from the BFD @var{ibfd} to the
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{obfd}.
.#define bfd_copy_private_bfd_data(ibfd, obfd) \
. BFD_SEND (obfd, _bfd_copy_private_bfd_data, \
. (ibfd, obfd))
*/
/*
FUNCTION
bfd_set_private_flags
SYNOPSIS
bfd_boolean bfd_set_private_flags (bfd *abfd, flagword flags);
DESCRIPTION
Set private BFD flag information in the BFD @var{abfd}.
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{obfd}.
.#define bfd_set_private_flags(abfd, flags) \
. BFD_SEND (abfd, _bfd_set_private_flags, (abfd, flags))
*/
/*
FUNCTION
Other functions
DESCRIPTION
The following functions exist but have not yet been documented.
.#define bfd_sizeof_headers(abfd, info) \
. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, info))
.
.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
. BFD_SEND (abfd, _bfd_find_nearest_line, \
. (abfd, syms, sec, off, file, func, line, NULL))
.
.#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
. line, disc) \
. BFD_SEND (abfd, _bfd_find_nearest_line, \
. (abfd, syms, sec, off, file, func, line, disc))
.
.#define bfd_find_line(abfd, syms, sym, file, line) \
. BFD_SEND (abfd, _bfd_find_line, \
. (abfd, syms, sym, file, line))
.
.#define bfd_find_inliner_info(abfd, file, func, line) \
. BFD_SEND (abfd, _bfd_find_inliner_info, \
. (abfd, file, func, line))
.
.#define bfd_debug_info_start(abfd) \
. BFD_SEND (abfd, _bfd_debug_info_start, (abfd))
.
.#define bfd_debug_info_end(abfd) \
. BFD_SEND (abfd, _bfd_debug_info_end, (abfd))
.
.#define bfd_debug_info_accumulate(abfd, section) \
. BFD_SEND (abfd, _bfd_debug_info_accumulate, (abfd, section))
.
.#define bfd_stat_arch_elt(abfd, stat) \
. BFD_SEND (abfd, _bfd_stat_arch_elt,(abfd, stat))
.
.#define bfd_update_armap_timestamp(abfd) \
. BFD_SEND (abfd, _bfd_update_armap_timestamp, (abfd))
.
.#define bfd_set_arch_mach(abfd, arch, mach)\
. BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
.
.#define bfd_relax_section(abfd, section, link_info, again) \
. BFD_SEND (abfd, _bfd_relax_section, (abfd, section, link_info, again))
.
.#define bfd_gc_sections(abfd, link_info) \
. BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
.
.#define bfd_lookup_section_flags(link_info, flag_info, section) \
. BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info, section))
.
.#define bfd_merge_sections(abfd, link_info) \
. BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
.
.#define bfd_is_group_section(abfd, sec) \
. BFD_SEND (abfd, _bfd_is_group_section, (abfd, sec))
.
.#define bfd_discard_group(abfd, sec) \
. BFD_SEND (abfd, _bfd_discard_group, (abfd, sec))
.
.#define bfd_link_hash_table_create(abfd) \
. BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
.
.#define bfd_link_add_symbols(abfd, info) \
. BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
.
.#define bfd_link_just_syms(abfd, sec, info) \
. BFD_SEND (abfd, _bfd_link_just_syms, (sec, info))
.
.#define bfd_final_link(abfd, info) \
. BFD_SEND (abfd, _bfd_final_link, (abfd, info))
.
.#define bfd_free_cached_info(abfd) \
. BFD_SEND (abfd, _bfd_free_cached_info, (abfd))
.
.#define bfd_get_dynamic_symtab_upper_bound(abfd) \
. BFD_SEND (abfd, _bfd_get_dynamic_symtab_upper_bound, (abfd))
.
.#define bfd_print_private_bfd_data(abfd, file)\
. BFD_SEND (abfd, _bfd_print_private_bfd_data, (abfd, file))
.
.#define bfd_canonicalize_dynamic_symtab(abfd, asymbols) \
. BFD_SEND (abfd, _bfd_canonicalize_dynamic_symtab, (abfd, asymbols))
.
.#define bfd_get_synthetic_symtab(abfd, count, syms, dyncount, dynsyms, ret) \
. BFD_SEND (abfd, _bfd_get_synthetic_symtab, (abfd, count, syms, \
. dyncount, dynsyms, ret))
.
.#define bfd_get_dynamic_reloc_upper_bound(abfd) \
. BFD_SEND (abfd, _bfd_get_dynamic_reloc_upper_bound, (abfd))
.
.#define bfd_canonicalize_dynamic_reloc(abfd, arels, asyms) \
. BFD_SEND (abfd, _bfd_canonicalize_dynamic_reloc, (abfd, arels, asyms))
.
.extern bfd_byte *bfd_get_relocated_section_contents
. (bfd *, struct bfd_link_info *, struct bfd_link_order *, bfd_byte *,
. bfd_boolean, asymbol **);
.
*/
bfd_byte *
bfd_get_relocated_section_contents (bfd *abfd,
struct bfd_link_info *link_info,
struct bfd_link_order *link_order,
bfd_byte *data,
bfd_boolean relocatable,
asymbol **symbols)
{
bfd *abfd2;
bfd_byte *(*fn) (bfd *, struct bfd_link_info *, struct bfd_link_order *,
bfd_byte *, bfd_boolean, asymbol **);
if (link_order->type == bfd_indirect_link_order)
{
abfd2 = link_order->u.indirect.section->owner;
if (abfd2 == NULL)
abfd2 = abfd;
}
else
abfd2 = abfd;
fn = abfd2->xvec->_bfd_get_relocated_section_contents;
return (*fn) (abfd, link_info, link_order, data, relocatable, symbols);
}
/* Record information about an ELF program header. */
bfd_boolean
bfd_record_phdr (bfd *abfd,
unsigned long type,
bfd_boolean flags_valid,
flagword flags,
bfd_boolean at_valid,
bfd_vma at,
bfd_boolean includes_filehdr,
bfd_boolean includes_phdrs,
unsigned int count,
asection **secs)
{
struct elf_segment_map *m, **pm;
bfd_size_type amt;
if (bfd_get_flavour (abfd) != bfd_target_elf_flavour)
return TRUE;
amt = sizeof (struct elf_segment_map);
amt += ((bfd_size_type) count - 1) * sizeof (asection *);
m = (struct elf_segment_map *) bfd_zalloc (abfd, amt);
if (m == NULL)
return FALSE;
m->p_type = type;
m->p_flags = flags;
m->p_paddr = at;
m->p_flags_valid = flags_valid;
m->p_paddr_valid = at_valid;
m->includes_filehdr = includes_filehdr;
m->includes_phdrs = includes_phdrs;
m->count = count;
if (count > 0)
memcpy (m->sections, secs, count * sizeof (asection *));
for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next)
;
*pm = m;
return TRUE;
}
#ifdef BFD64
/* Return true iff this target is 32-bit. */
static bfd_boolean
is32bit (bfd *abfd)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
return bed->s->elfclass == ELFCLASS32;
}
/* For non-ELF targets, use architecture information. */
return bfd_arch_bits_per_address (abfd) <= 32;
}
#endif
/* bfd_sprintf_vma and bfd_fprintf_vma display an address in the
target's address size. */
void
bfd_sprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, char *buf, bfd_vma value)
{
#ifdef BFD64
if (is32bit (abfd))
{
sprintf (buf, "%08lx", (unsigned long) value & 0xffffffff);
return;
}
#endif
sprintf_vma (buf, value);
}
void
bfd_fprintf_vma (bfd *abfd ATTRIBUTE_UNUSED, void *stream, bfd_vma value)
{
#ifdef BFD64
if (is32bit (abfd))
{
fprintf ((FILE *) stream, "%08lx", (unsigned long) value & 0xffffffff);
return;
}
#endif
fprintf_vma ((FILE *) stream, value);
}
/*
FUNCTION
bfd_alt_mach_code
SYNOPSIS
bfd_boolean bfd_alt_mach_code (bfd *abfd, int alternative);
DESCRIPTION
When more than one machine code number is available for the
same machine type, this function can be used to switch between
the preferred one (alternative == 0) and any others. Currently,
only ELF supports this feature, with up to two alternate
machine codes.
*/
bfd_boolean
bfd_alt_mach_code (bfd *abfd, int alternative)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
int code;
switch (alternative)
{
case 0:
code = get_elf_backend_data (abfd)->elf_machine_code;
break;
case 1:
code = get_elf_backend_data (abfd)->elf_machine_alt1;
if (code == 0)
return FALSE;
break;
case 2:
code = get_elf_backend_data (abfd)->elf_machine_alt2;
if (code == 0)
return FALSE;
break;
default:
return FALSE;
}
elf_elfheader (abfd)->e_machine = code;
return TRUE;
}
return FALSE;
}
/*
FUNCTION
bfd_emul_get_maxpagesize
SYNOPSIS
bfd_vma bfd_emul_get_maxpagesize (const char *);
DESCRIPTION
Returns the maximum page size, in bytes, as determined by
emulation.
RETURNS
Returns the maximum page size in bytes for ELF, 0 otherwise.
*/
bfd_vma
bfd_emul_get_maxpagesize (const char *emul)
{
const bfd_target *target;
target = bfd_find_target (emul, NULL);
if (target != NULL
&& target->flavour == bfd_target_elf_flavour)
return xvec_get_elf_backend_data (target)->maxpagesize;
return 0;
}
static void
bfd_elf_set_pagesize (const bfd_target *target, bfd_vma size,
int offset, const bfd_target *orig_target)
{
if (target->flavour == bfd_target_elf_flavour)
{
const struct elf_backend_data *bed;
bed = xvec_get_elf_backend_data (target);
*((bfd_vma *) ((char *) bed + offset)) = size;
}
if (target->alternative_target
&& target->alternative_target != orig_target)
bfd_elf_set_pagesize (target->alternative_target, size, offset,
orig_target);
}
/*
FUNCTION
bfd_emul_set_maxpagesize
SYNOPSIS
void bfd_emul_set_maxpagesize (const char *, bfd_vma);
DESCRIPTION
For ELF, set the maximum page size for the emulation. It is
a no-op for other formats.
*/
void
bfd_emul_set_maxpagesize (const char *emul, bfd_vma size)
{
const bfd_target *target;
target = bfd_find_target (emul, NULL);
if (target)
bfd_elf_set_pagesize (target, size,
offsetof (struct elf_backend_data,
maxpagesize), target);
}
/*
FUNCTION
bfd_emul_get_commonpagesize
SYNOPSIS
bfd_vma bfd_emul_get_commonpagesize (const char *);
DESCRIPTION
Returns the common page size, in bytes, as determined by
emulation.
RETURNS
Returns the common page size in bytes for ELF, 0 otherwise.
*/
bfd_vma
bfd_emul_get_commonpagesize (const char *emul)
{
const bfd_target *target;
target = bfd_find_target (emul, NULL);
if (target != NULL
&& target->flavour == bfd_target_elf_flavour)
return xvec_get_elf_backend_data (target)->commonpagesize;
return 0;
}
/*
FUNCTION
bfd_emul_set_commonpagesize
SYNOPSIS
void bfd_emul_set_commonpagesize (const char *, bfd_vma);
DESCRIPTION
For ELF, set the common page size for the emulation. It is
a no-op for other formats.
*/
void
bfd_emul_set_commonpagesize (const char *emul, bfd_vma size)
{
const bfd_target *target;
target = bfd_find_target (emul, NULL);
if (target)
bfd_elf_set_pagesize (target, size,
offsetof (struct elf_backend_data,
commonpagesize), target);
}
/*
FUNCTION
bfd_demangle
SYNOPSIS
char *bfd_demangle (bfd *, const char *, int);
DESCRIPTION
Wrapper around cplus_demangle. Strips leading underscores and
other such chars that would otherwise confuse the demangler.
If passed a g++ v3 ABI mangled name, returns a buffer allocated
with malloc holding the demangled name. Returns NULL otherwise
and on memory alloc failure.
*/
char *
bfd_demangle (bfd *abfd, const char *name, int options)
{
char *res, *alloc;
const char *pre, *suf;
size_t pre_len;
bfd_boolean skip_lead;
skip_lead = (abfd != NULL
&& *name != '\0'
&& bfd_get_symbol_leading_char (abfd) == *name);
if (skip_lead)
++name;
/* This is a hack for better error reporting on XCOFF, PowerPC64-ELF
or the MS PE format. These formats have a number of leading '.'s
on at least some symbols, so we remove all dots to avoid
confusing the demangler. */
pre = name;
while (*name == '.' || *name == '$')
++name;
pre_len = name - pre;
/* Strip off @plt and suchlike too. */
alloc = NULL;
suf = strchr (name, '@');
if (suf != NULL)
{
alloc = (char *) bfd_malloc (suf - name + 1);
if (alloc == NULL)
return NULL;
memcpy (alloc, name, suf - name);
alloc[suf - name] = '\0';
name = alloc;
}
res = cplus_demangle (name, options);
if (alloc != NULL)
free (alloc);
if (res == NULL)
{
if (skip_lead)
{
size_t len = strlen (pre) + 1;
alloc = (char *) bfd_malloc (len);
if (alloc == NULL)
return NULL;
memcpy (alloc, pre, len);
return alloc;
}
return NULL;
}
/* Put back any prefix or suffix. */
if (pre_len != 0 || suf != NULL)
{
size_t len;
size_t suf_len;
char *final;
len = strlen (res);
if (suf == NULL)
suf = res + len;
suf_len = strlen (suf) + 1;
final = (char *) bfd_malloc (pre_len + len + suf_len);
if (final != NULL)
{
memcpy (final, pre, pre_len);
memcpy (final + pre_len, res, len);
memcpy (final + pre_len + len, suf, suf_len);
}
free (res);
res = final;
}
return res;
}
/*
FUNCTION
bfd_update_compression_header
SYNOPSIS
void bfd_update_compression_header
(bfd *abfd, bfd_byte *contents, asection *sec);
DESCRIPTION
Set the compression header at CONTENTS of SEC in ABFD and update
elf_section_flags for compression.
*/
void
bfd_update_compression_header (bfd *abfd, bfd_byte *contents,
asection *sec)
{
if ((abfd->flags & BFD_COMPRESS) != 0)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
if ((abfd->flags & BFD_COMPRESS_GABI) != 0)
{
const struct elf_backend_data *bed
= get_elf_backend_data (abfd);
/* Set the SHF_COMPRESSED bit. */
elf_section_flags (sec) |= SHF_COMPRESSED;
if (bed->s->elfclass == ELFCLASS32)
{
Elf32_External_Chdr *echdr
= (Elf32_External_Chdr *) contents;
bfd_put_32 (abfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
bfd_put_32 (abfd, sec->size, &echdr->ch_size);
bfd_put_32 (abfd, 1 << sec->alignment_power,
&echdr->ch_addralign);
}
else
{
Elf64_External_Chdr *echdr
= (Elf64_External_Chdr *) contents;
bfd_put_32 (abfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
bfd_put_32 (abfd, 0, &echdr->ch_reserved);
bfd_put_64 (abfd, sec->size, &echdr->ch_size);
bfd_put_64 (abfd, 1 << sec->alignment_power,
&echdr->ch_addralign);
}
}
else
{
/* Clear the SHF_COMPRESSED bit. */
elf_section_flags (sec) &= ~SHF_COMPRESSED;
/* Write the zlib header. It should be "ZLIB" followed by
the uncompressed section size, 8 bytes in big-endian
order. */
memcpy (contents, "ZLIB", 4);
bfd_putb64 (sec->size, contents + 4);
}
}
}
else
abort ();
}
/*
FUNCTION
bfd_check_compression_header
SYNOPSIS
bfd_boolean bfd_check_compression_header
(bfd *abfd, bfd_byte *contents, asection *sec,
bfd_size_type *uncompressed_size);
DESCRIPTION
Check the compression header at CONTENTS of SEC in ABFD and
store the uncompressed size in UNCOMPRESSED_SIZE if the
compression header is valid.
RETURNS
Return TRUE if the compression header is valid.
*/
bfd_boolean
bfd_check_compression_header (bfd *abfd, bfd_byte *contents,
asection *sec,
bfd_size_type *uncompressed_size)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour
&& (elf_section_flags (sec) & SHF_COMPRESSED) != 0)
{
Elf_Internal_Chdr chdr;
const struct elf_backend_data *bed = get_elf_backend_data (abfd);
if (bed->s->elfclass == ELFCLASS32)
{
Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
chdr.ch_type = bfd_get_32 (abfd, &echdr->ch_type);
chdr.ch_size = bfd_get_32 (abfd, &echdr->ch_size);
chdr.ch_addralign = bfd_get_32 (abfd, &echdr->ch_addralign);
}
else
{
Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
chdr.ch_type = bfd_get_32 (abfd, &echdr->ch_type);
chdr.ch_size = bfd_get_64 (abfd, &echdr->ch_size);
chdr.ch_addralign = bfd_get_64 (abfd, &echdr->ch_addralign);
}
if (chdr.ch_type == ELFCOMPRESS_ZLIB
&& chdr.ch_addralign == 1U << sec->alignment_power)
{
*uncompressed_size = chdr.ch_size;
return TRUE;
}
}
return FALSE;
}
/*
FUNCTION
bfd_get_compression_header_size
SYNOPSIS
int bfd_get_compression_header_size (bfd *abfd, asection *sec);
DESCRIPTION
Return the size of the compression header of SEC in ABFD.
RETURNS
Return the size of the compression header in bytes.
*/
int
bfd_get_compression_header_size (bfd *abfd, asection *sec)
{
if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
{
if (sec == NULL)
{
if (!(abfd->flags & BFD_COMPRESS_GABI))
return 0;
}
else if (!(elf_section_flags (sec) & SHF_COMPRESSED))
return 0;
if (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS32)
return sizeof (Elf32_External_Chdr);
else
return sizeof (Elf64_External_Chdr);
}
return 0;
}
/*
FUNCTION
bfd_convert_section_size
SYNOPSIS
bfd_size_type bfd_convert_section_size
(bfd *ibfd, asection *isec, bfd *obfd, bfd_size_type size);
DESCRIPTION
Convert the size @var{size} of the section @var{isec} in input
BFD @var{ibfd} to the section size in output BFD @var{obfd}.
*/
bfd_size_type
bfd_convert_section_size (bfd *ibfd, sec_ptr isec, bfd *obfd,
bfd_size_type size)
{
bfd_size_type hdr_size;
/* Do nothing if input file will be decompressed. */
if ((ibfd->flags & BFD_DECOMPRESS))
return size;
/* Do nothing if either input or output aren't ELF. */
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return size;
/* Do nothing if ELF classes of input and output are the same. */
if (get_elf_backend_data (ibfd)->s->elfclass
== get_elf_backend_data (obfd)->s->elfclass)
return size;
/* Do nothing if the input section isn't a SHF_COMPRESSED section. */
hdr_size = bfd_get_compression_header_size (ibfd, isec);
if (hdr_size == 0)
return size;
/* Adjust the size of the output SHF_COMPRESSED section. */
if (hdr_size == sizeof (Elf32_External_Chdr))
return (size - sizeof (Elf32_External_Chdr)
+ sizeof (Elf64_External_Chdr));
else
return (size - sizeof (Elf64_External_Chdr)
+ sizeof (Elf32_External_Chdr));
}
/*
FUNCTION
bfd_convert_section_contents
SYNOPSIS
bfd_boolean bfd_convert_section_contents
(bfd *ibfd, asection *isec, bfd *obfd,
bfd_byte **ptr, bfd_size_type *ptr_size);
DESCRIPTION
Convert the contents, stored in @var{*ptr}, of the section
@var{isec} in input BFD @var{ibfd} to output BFD @var{obfd}
if needed. The original buffer pointed to by @var{*ptr} may
be freed and @var{*ptr} is returned with memory malloc'd by this
function, and the new size written to @var{ptr_size}.
*/
bfd_boolean
bfd_convert_section_contents (bfd *ibfd, sec_ptr isec, bfd *obfd,
bfd_byte **ptr, bfd_size_type *ptr_size)
{
bfd_byte *contents;
bfd_size_type ihdr_size, ohdr_size, size;
Elf_Internal_Chdr chdr;
bfd_boolean use_memmove;
/* Do nothing if input file will be decompressed. */
if ((ibfd->flags & BFD_DECOMPRESS))
return TRUE;
/* Do nothing if either input or output aren't ELF. */
if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
|| bfd_get_flavour (obfd) != bfd_target_elf_flavour)
return TRUE;
/* Do nothing if ELF classes of input and output are the same. */
if (get_elf_backend_data (ibfd)->s->elfclass
== get_elf_backend_data (obfd)->s->elfclass)
return TRUE;
/* Do nothing if the input section isn't a SHF_COMPRESSED section. */
ihdr_size = bfd_get_compression_header_size (ibfd, isec);
if (ihdr_size == 0)
return TRUE;
contents = *ptr;
/* Convert the contents of the input SHF_COMPRESSED section to
output. Get the input compression header and the size of the
output compression header. */
if (ihdr_size == sizeof (Elf32_External_Chdr))
{
Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
chdr.ch_size = bfd_get_32 (ibfd, &echdr->ch_size);
chdr.ch_addralign = bfd_get_32 (ibfd, &echdr->ch_addralign);
ohdr_size = sizeof (Elf64_External_Chdr);
use_memmove = FALSE;
}
else
{
Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
chdr.ch_type = bfd_get_32 (ibfd, &echdr->ch_type);
chdr.ch_size = bfd_get_64 (ibfd, &echdr->ch_size);
chdr.ch_addralign = bfd_get_64 (ibfd, &echdr->ch_addralign);
ohdr_size = sizeof (Elf32_External_Chdr);
use_memmove = TRUE;
}
size = bfd_get_section_size (isec) - ihdr_size + ohdr_size;
if (!use_memmove)
{
contents = (bfd_byte *) bfd_malloc (size);
if (contents == NULL)
return FALSE;
}
/* Write out the output compression header. */
if (ohdr_size == sizeof (Elf32_External_Chdr))
{
Elf32_External_Chdr *echdr = (Elf32_External_Chdr *) contents;
bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
bfd_put_32 (obfd, chdr.ch_size, &echdr->ch_size);
bfd_put_32 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
}
else
{
Elf64_External_Chdr *echdr = (Elf64_External_Chdr *) contents;
bfd_put_32 (obfd, ELFCOMPRESS_ZLIB, &echdr->ch_type);
bfd_put_32 (obfd, 0, &echdr->ch_reserved);
bfd_put_64 (obfd, chdr.ch_size, &echdr->ch_size);
bfd_put_64 (obfd, chdr.ch_addralign, &echdr->ch_addralign);
}
/* Copy the compressed contents. */
if (use_memmove)
memmove (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);
else
{
memcpy (contents + ohdr_size, *ptr + ihdr_size, size - ohdr_size);
free (*ptr);
*ptr = contents;
}
*ptr_size = size;
return TRUE;
}
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