/* Generic BFD library interface and support routines.
- Copyright (C) 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
+ Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
+ 2000, 2001, 2002
+ Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
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. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/*
SECTION
<<typedef bfd>>
- A BFD is has type <<bfd>>; objects of this type are the
- cornerstone of any application using <<libbfd>>. References
- though the BFD and to data in the BFD give the entire BFD
- functionality.
+ 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 struct used to define the type <<bfd>>. This
- contains the major data about the file, and contains pointers
+ 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
.
-.struct _bfd
+.struct _bfd
.{
-. {* The filename the application opened the BFD with. *}
-. CONST char *filename;
+. {* The filename the application opened the BFD with. *}
+. const char *filename;
.
-. {* A pointer to the target jump table. *}
-. struct bfd_target *xvec;
+. {* A pointer to the target jump table. *}
+. const struct bfd_target *xvec;
.
-. {* To avoid dragging too many header files into every file that
-. includes `<<bfd.h>>', IOSTREAM has been declared as a "char
-. *", and MTIME as a "long". Their correct types, to which they
-. are cast when used, are "FILE *" and "time_t". The iostream
-. is the result of an fopen on the filename. *}
-. char *iostream;
+. {* To avoid dragging too many header files into every file that
+. includes `<<bfd.h>>', IOSTREAM has been declared as a "char *",
+. and MTIME as a "long". Their correct types, to which they
+. are cast when used, are "FILE *" and "time_t". The iostream
+. is the result of an fopen on the filename. However, if the
+. BFD_IN_MEMORY flag is set, then iostream is actually a pointer
+. to a bfd_in_memory struct. *}
+. PTR iostream;
.
-. {* Is the file being cached *}
+. {* Is the file descriptor being cached? That is, can it be closed as
+. needed, and re-opened when accessed later? *}
+. boolean cacheable;
.
-. boolean cacheable;
+. {* 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. *}
+. boolean target_defaulted;
.
-. {* Marks whether there was a default target specified when the
-. BFD was opened. This is used to select what matching algorithm
-. to use to chose the back end. *}
+. {* The caching routines use these to maintain a
+. least-recently-used list of BFDs. *}
+. struct _bfd *lru_prev, *lru_next;
.
-. boolean target_defaulted;
+. {* When a file is closed by the caching routines, BFD retains
+. state information on the file here... *}
+. ufile_ptr where;
.
-. {* The caching routines use these to maintain a
-. least-recently-used list of BFDs *}
+. {* ... and here: (``once'' means at least once). *}
+. boolean opened_once;
.
-. struct _bfd *lru_prev, *lru_next;
+. {* Set if we have a locally maintained mtime value, rather than
+. getting it from the file each time. *}
+. boolean mtime_set;
.
-. {* When a file is closed by the caching routines, BFD retains
-. state information on the file here:
-. *}
+. {* File modified time, if mtime_set is true. *}
+. long mtime;
.
-. file_ptr where;
+. {* Reserved for an unimplemented file locking extension. *}
+. int ifd;
.
-. {* and here:*}
+. {* The format which belongs to the BFD. (object, core, etc.) *}
+. bfd_format format;
.
-. boolean opened_once;
+. {* The direction with which the BFD was opened. *}
+. enum bfd_direction
+. {
+. no_direction = 0,
+. read_direction = 1,
+. write_direction = 2,
+. both_direction = 3
+. }
+. direction;
.
-. {* Set if we have a locally maintained mtime value, rather than
-. getting it from the file each time: *}
+. {* Format_specific flags. *}
+. flagword flags;
.
-. boolean mtime_set;
+. {* 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;
.
-. {* File modified time, if mtime_set is true: *}
+. {* Remember when output has begun, to stop strange things
+. from happening. *}
+. boolean output_has_begun;
.
-. long mtime;
+. {* A hash table for section names. *}
+. struct bfd_hash_table section_htab;
.
-. {* Reserved for an unimplemented file locking extension.*}
+. {* Pointer to linked list of sections. *}
+. struct sec *sections;
.
-. int ifd;
+. {* The place where we add to the section list. *}
+. struct sec **section_tail;
.
-. {* The format which belongs to the BFD.*}
+. {* The number of sections. *}
+. unsigned int section_count;
.
-. bfd_format format;
+. {* Stuff only useful for object files:
+. The start address. *}
+. bfd_vma start_address;
.
-. {* The direction the BFD was opened with*}
+. {* Used for input and output. *}
+. unsigned int symcount;
.
-. enum bfd_direction {no_direction = 0,
-. read_direction = 1,
-. write_direction = 2,
-. both_direction = 3} direction;
+. {* Symbol table for output BFD (with symcount entries). *}
+. struct symbol_cache_entry **outsymbols;
.
-. {* Format_specific flags*}
+. {* Pointer to structure which contains architecture information. *}
+. const struct bfd_arch_info *arch_info;
.
-. flagword flags;
+. {* Stuff only useful for archives. *}
+. PTR arelt_data;
+. struct _bfd *my_archive; {* The containing archive BFD. *}
+. struct _bfd *next; {* The next BFD in the archive. *}
+. struct _bfd *archive_head; {* The first BFD in the archive. *}
+. boolean has_armap;
.
-. {* 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. *}
+. {* A chain of BFD structures involved in a link. *}
+. struct _bfd *link_next;
.
-. file_ptr origin;
+. {* A field used by _bfd_generic_link_add_archive_symbols. This will
+. be used only for archive elements. *}
+. int archive_pass;
.
-. {* Remember when output has begun, to stop strange things
-. happening. *}
-. boolean output_has_begun;
-.
-. {* Pointer to linked list of sections*}
-. struct sec *sections;
-.
-. {* The number of sections *}
-. unsigned int section_count;
-.
-. {* Stuff only useful for object files:
-. The start address. *}
-. bfd_vma start_address;
-.
-. {* Used for input and output*}
-. unsigned int symcount;
-.
-. {* Symbol table for output BFD*}
-. struct symbol_cache_entry **outsymbols;
-.
-. {* Pointer to structure which contains architecture information*}
-. struct bfd_arch_info *arch_info;
-.
-. {* Stuff only useful for archives:*}
-. PTR arelt_data;
-. struct _bfd *my_archive;
-. struct _bfd *next;
-. struct _bfd *archive_head;
-. boolean has_armap;
-.
-. {* Used by the back end to hold private data. *}
-.
-. union
-. {
+. {* 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 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 hppa_data_struct *hppa_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;
. PTR any;
-. } tdata;
-.
-. {* Used by the application to hold private data*}
-. PTR usrdata;
+. }
+. tdata;
.
-. {* Where all the allocated stuff under this BFD goes *}
-. struct obstack memory;
+. {* Used by the application to hold private data. *}
+. PTR usrdata;
.
-. {* Is this really needed in addition to usrdata? *}
-. asymbol **ld_symbols;
+. {* Where all the allocated stuff under this BFD goes. This is a
+. struct objalloc *, but we use PTR to avoid requiring the inclusion of
+. objalloc.h. *}
+. PTR memory;
.};
.
*/
#include "bfd.h"
#include "sysdep.h"
+
+#ifdef ANSI_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+
+#include "libiberty.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"
+\f
+/* 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 */
+\f
+/*
+SECTION
+ Error reporting
-#undef strerror
-extern char *strerror();
+ 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>>.
-CONST short _bfd_host_big_endian = 0x0100;
- /* Accessing the above as (*(char*)&_bfd_host_big_endian), will
- return 1 if the host is big-endian, 0 otherwise.
- (assuming that a short is two bytes long!!! FIXME)
- (See HOST_IS_BIG_ENDIAN_P in bfd.h.) */
-\f
-/** Error handling
- o - Most functions return nonzero on success (check doc for
- precise semantics); 0 or NULL on error.
- o - Internal errors are documented by the value of bfd_error.
- If that is system_call_error then check errno.
- o - The easiest way to report this 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_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_invalid_error_code
+.}
+.bfd_error_type;
+.
*/
-bfd_ec bfd_error = no_error;
-
-CONST char *CONST bfd_errmsgs[] = {
- "No error",
- "System call error",
- "Invalid target",
- "File in wrong format",
- "Invalid operation",
- "Memory exhausted",
- "No symbols",
- "No relocation info",
- "No more archived files",
- "Malformed archive",
- "Symbol not found",
- "File format not recognized",
- "File format is ambiguous",
- "Section has no contents",
- "Nonrepresentable section on output",
- "Symbol needs debug section which does not exist",
- "Bad value",
- "File truncated",
- "#<Invalid error code>"
- };
-
-static
-void
-DEFUN(bfd_nonrepresentable_section,(abfd, name),
- CONST bfd * CONST abfd AND
- CONST char * CONST name)
-{
- fprintf(stderr,
- "bfd error writing file %s, format %s can't represent section %s\n",
- abfd->filename,
- abfd->xvec->name,
- name);
- exit(1);
-}
+static bfd_error_type bfd_error = bfd_error_no_error;
-/*ARGSUSED*/
-static
-void
-DEFUN(bfd_undefined_symbol,(relent, seclet),
- CONST arelent *relent AND
- CONST struct bfd_seclet *seclet)
+const char *const bfd_errmsgs[] =
{
- asymbol *symbol = *(relent->sym_ptr_ptr);
- fprintf(stderr, "bfd error relocating, symbol %s is undefined\n",
- symbol->name);
- exit(1);
-}
-/*ARGSUSED*/
-static
-void
-DEFUN(bfd_reloc_value_truncated,(relent, seclet),
- CONST arelent *relent AND
- struct bfd_seclet *seclet)
+ 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_("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_("#<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 ()
{
- fprintf(stderr, "bfd error relocating, value truncated\n");
- exit(1);
+ return bfd_error;
}
-/*ARGSUSED*/
-static
-void
-DEFUN(bfd_reloc_is_dangerous,(relent, seclet),
- CONST arelent *relent AND
- CONST struct bfd_seclet *seclet)
+
+/*
+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}.
+*/
+
+void
+bfd_set_error (error_tag)
+ bfd_error_type error_tag;
{
- fprintf(stderr, "bfd error relocating, dangerous\n");
- exit(1);
+ bfd_error = error_tag;
}
-bfd_error_vector_type bfd_error_vector =
- {
- bfd_nonrepresentable_section ,
- bfd_undefined_symbol,
- bfd_reloc_value_truncated,
- bfd_reloc_is_dangerous,
- };
+/*
+FUNCTION
+ bfd_errmsg
+SYNOPSIS
+ const char *bfd_errmsg (bfd_error_type error_tag);
-CONST char *
+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 (error_tag)
- bfd_ec error_tag;
+ bfd_error_type error_tag;
{
#ifndef errno
extern int errno;
#endif
- if (error_tag == system_call_error)
- return strerror (errno);
+ if (error_tag == bfd_error_system_call)
+ return xstrerror (errno);
- if ((((int)error_tag <(int) no_error) ||
- ((int)error_tag > (int)invalid_error_code)))
- error_tag = invalid_error_code;/* sanity check */
+ if ((((int) error_tag < (int) bfd_error_no_error) ||
+ ((int) error_tag > (int) bfd_error_invalid_error_code)))
+ error_tag = bfd_error_invalid_error_code;/* sanity check */
- return bfd_errmsgs [(int)error_tag];
+ return _(bfd_errmsgs [(int)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
-DEFUN (bfd_default_error_trap, (error_tag),
- bfd_ec error_tag)
+bfd_perror (message)
+ const char *message;
+{
+ if (bfd_get_error () == bfd_error_system_call)
+ /* Must be a system error then. */
+ perror ((char *)message);
+ else
+ {
+ 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 ()));
+ }
+}
+
+/*
+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 overriden by the program.
+
+ The BFD error handler acts like printf.
+
+CODE_FRAGMENT
+.
+.typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...));
+.
+*/
+
+/* The program name used when printing BFD error messages. */
+
+static const char *_bfd_error_program_name;
+
+/* This is the default routine to handle BFD error messages. */
+
+static void _bfd_default_error_handler PARAMS ((const char *s, ...));
+
+static void
+_bfd_default_error_handler VPARAMS ((const char *s, ...))
+{
+ if (_bfd_error_program_name != NULL)
+ fprintf (stderr, "%s: ", _bfd_error_program_name);
+ else
+ fprintf (stderr, "BFD: ");
+
+ VA_OPEN (p, s);
+ VA_FIXEDARG (p, const char *, s);
+ vfprintf (stderr, s, p);
+ VA_CLOSE (p);
+
+ fprintf (stderr, "\n");
+}
+
+/* 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. */
+
+bfd_error_handler_type _bfd_error_handler = _bfd_default_error_handler;
+
+/*
+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 (pnew)
+ bfd_error_handler_type pnew;
{
- fprintf(stderr, "bfd assert fail (%s)\n", bfd_errmsg(error_tag));
+ bfd_error_handler_type pold;
+
+ pold = _bfd_error_handler;
+ _bfd_error_handler = pnew;
+ return pold;
}
-void (*bfd_error_trap) PARAMS ((bfd_ec)) = bfd_default_error_trap;
-void (*bfd_error_nonrepresentabltrap) PARAMS ((bfd_ec)) = bfd_default_error_trap;
+/*
+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
-DEFUN(bfd_perror,(message),
- CONST char *message)
+bfd_set_error_program_name (name)
+ const char *name;
{
- if (bfd_error == system_call_error)
- perror((char *)message); /* must be system error then... */
- else {
- if (message == NULL || *message == '\0')
- fprintf (stderr, "%s\n", bfd_errmsg (bfd_error));
- else
- fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_error));
- }
+ _bfd_error_program_name = name;
}
- \f
-/** Symbols */
+/*
+FUNCTION
+ bfd_get_error_handler
+
+SYNOPSIS
+ bfd_error_handler_type bfd_get_error_handler (void);
+DESCRIPTION
+ Return the BFD error handler function.
+*/
+
+bfd_error_handler_type
+bfd_get_error_handler ()
+{
+ return _bfd_error_handler;
+}
/*
FUNCTION
- bfd_get_reloc_upper_bound
+ bfd_archive_filename
SYNOPSIS
- unsigned int bfd_get_reloc_upper_bound(bfd *abfd, asection *sect);
+ const char *bfd_archive_filename (bfd *);
DESCRIPTION
- This function return the number of bytes required to store the
- relocation information associated with section <<sect>>
- attached to bfd <<abfd>>
+ For a BFD that is a component of an archive, returns a string
+ with both the archive name and file name. For other BFDs, just
+ returns the file name.
+*/
+const char *
+bfd_archive_filename (abfd)
+ bfd *abfd;
+{
+ if (abfd->my_archive)
+ {
+ static size_t curr = 0;
+ static char *buf;
+ size_t needed;
+
+ needed = (strlen (bfd_get_filename (abfd->my_archive))
+ + strlen (bfd_get_filename (abfd)) + 3);
+ if (needed > curr)
+ {
+ if (curr)
+ free (buf);
+ curr = needed + (needed >> 1);
+ buf = bfd_malloc ((bfd_size_type) curr);
+ /* If we can't malloc, fail safe by returning just the file
+ name. This function is only used when building error
+ messages. */
+ if (!buf)
+ {
+ curr = 0;
+ return bfd_get_filename (abfd);
+ }
+ }
+ sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive),
+ bfd_get_filename (abfd));
+ return buf;
+ }
+ else
+ return bfd_get_filename (abfd);
+}
+\f
+/*
+SECTION
+ Symbols
*/
+/*
+FUNCTION
+ bfd_get_reloc_upper_bound
-unsigned int
-DEFUN(bfd_get_reloc_upper_bound,(abfd, asect),
- bfd *abfd AND
- sec_ptr asect)
+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 (abfd, asect)
+ bfd *abfd;
+ sec_ptr asect;
{
- if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
- return 0;
- }
+ if (abfd->format != bfd_object)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return -1;
+ }
return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
}
bfd_canonicalize_reloc
SYNOPSIS
- unsigned int bfd_canonicalize_reloc
+ long bfd_canonicalize_reloc
(bfd *abfd,
asection *sec,
arelent **loc,
asymbol **syms);
DESCRIPTION
- This function calls the back end associated with the open
- <<abfd>> and translates the external form of the relocation
- information attached to <<sec>> into the internal canonical
- form. The table is placed into memory at <<loc>>, which has
+ 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>>.
+ <<bfd_get_reloc_upper_bound>>. Returns the number of relocs, or
+ -1 on error.
- The <<syms>> table is also needed for horrible internal magic
+ The @var{syms} table is also needed for horrible internal magic
reasons.
-
*/
-unsigned int
-DEFUN(bfd_canonicalize_reloc,(abfd, asect, location, symbols),
- bfd *abfd AND
- sec_ptr asect AND
- arelent **location AND
- asymbol **symbols)
+long
+bfd_canonicalize_reloc (abfd, asect, location, symbols)
+ bfd *abfd;
+ sec_ptr asect;
+ arelent **location;
+ asymbol **symbols;
{
- if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
- return 0;
- }
- return BFD_SEND (abfd, _bfd_canonicalize_reloc,
- (abfd, asect, location, 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.
+
+*/
+void
+bfd_set_reloc (ignore_abfd, asect, location, count)
+ bfd *ignore_abfd ATTRIBUTE_UNUSED;
+ sec_ptr asect;
+ arelent **location;
+ unsigned int count;
+{
+ asect->orelocation = location;
+ asect->reloc_count = count;
+}
/*
FUNCTION
boolean bfd_set_file_flags(bfd *abfd, flagword flags);
DESCRIPTION
- This function attempts to set the flag word in the referenced
- BFD structure to the value supplied.
+ Set the flag word in the BFD @var{abfd} to the value @var{flags}.
Possible errors are:
- o wrong_format - The target bfd was not of object format.
- o invalid_operation - The target bfd was open for reading.
- o invalid_operation -
+ 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. eg, an attempt was made to set the D_PAGED bit
- on a bfd format which does not support demand paging
+ 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 *abfd;
flagword flags;
{
- if (abfd->format != bfd_object) {
- bfd_error = wrong_format;
- return false;
- }
-
- if (bfd_read_p (abfd)) {
- bfd_error = invalid_operation;
- return false;
- }
+ 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_error = invalid_operation;
- return false;
- }
+ if ((flags & bfd_applicable_file_flags (abfd)) != flags)
+ {
+ bfd_set_error (bfd_error_invalid_operation);
+ return false;
+ }
-return true;
+ return true;
+}
+
+void
+bfd_assert (file, line)
+ const char *file;
+ int line;
+{
+ (*_bfd_error_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. */
+
+#ifndef EXIT_FAILURE
+#define EXIT_FAILURE 1
+#endif
+
+void
+_bfd_abort (file, line, fn)
+ const char *file;
+ int line;
+ const char *fn;
+{
+ if (fn != NULL)
+ (*_bfd_error_handler)
+ (_("BFD %s internal error, aborting at %s line %d in %s\n"),
+ BFD_VERSION_STRING, file, line, fn);
+ else
+ (*_bfd_error_handler)
+ (_("BFD %s internal error, aborting at %s line %d\n"),
+ BFD_VERSION_STRING, file, line);
+ (*_bfd_error_handler) (_("Please report this bug.\n"));
+ xexit (EXIT_FAILURE);
}
/*
FUNCTION
- bfd_set_reloc
+ bfd_get_arch_size
SYNOPSIS
- void bfd_set_reloc
- (bfd *abfd, asection *sec, arelent **rel, unsigned int count)
+ int bfd_get_arch_size (bfd *abfd);
DESCRIPTION
- This function sets the relocation pointer and count within a
- section to the supplied values.
+ Returns the architecture address size, in bits, as determined
+ by the object file's format. For ELF, this information is
+ included in the header.
+RETURNS
+ Returns the arch size in bits if known, <<-1>> otherwise.
*/
-/*ARGSUSED*/
-void
-bfd_set_reloc (ignore_abfd, asect, location, count)
- bfd *ignore_abfd;
- sec_ptr asect;
- arelent **location;
- unsigned int count;
+
+int
+bfd_get_arch_size (abfd)
+ bfd *abfd;
{
- asect->orelocation = location;
- asect->reloc_count = count;
+ if (abfd->xvec->flavour == bfd_target_elf_flavour)
+ return (get_elf_backend_data (abfd))->s->arch_size;
+
+ bfd_set_error (bfd_error_wrong_format);
+ return -1;
}
-void
-bfd_assert(file, line)
-char *file;
-int line;
+/*
+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 (abfd)
+ bfd *abfd;
{
- fprintf(stderr, "bfd assertion fail %s:%d\n",file,line);
-}
+ 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 COFF (an x86 COFF variant).
+ 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 (strncmp (name, "coff-go32", sizeof ("coff-go32") - 1) == 0)
+ return 1;
+
+ bfd_set_error (bfd_error_wrong_format);
+ return -1;
+}
/*
FUNCTION
bfd_set_start_address
+SYNOPSIS
+ boolean bfd_set_start_address(bfd *abfd, bfd_vma vma);
+
DESCRIPTION
- Marks the entry point of an output BFD.
+ Make @var{vma} the entry point of output BFD @var{abfd}.
RETURNS
Returns <<true>> on success, <<false>> otherwise.
-
-SYNOPSIS
- boolean bfd_set_start_address(bfd *, bfd_vma);
*/
boolean
-bfd_set_start_address(abfd, vma)
-bfd *abfd;
-bfd_vma vma;
+bfd_set_start_address (abfd, vma)
+ bfd *abfd;
+ bfd_vma vma;
{
abfd->start_address = vma;
return true;
}
-
/*
FUNCTION
- The bfd_get_mtime function
+ bfd_get_mtime
SYNOPSIS
- long bfd_get_mtime(bfd *);
+ long bfd_get_mtime(bfd *abfd);
DESCRIPTION
- Return file modification time (as read from file system, or
- from archive header for archive members).
+ Return the file modification time (as read from the file system, or
+ from the archive header for archive members).
*/
/*
FUNCTION
- The bfd_get_size function
+ bfd_get_size
SYNOPSIS
- long bfd_get_size(bfd *);
+ long bfd_get_size(bfd *abfd);
DESCRIPTION
- Return file size (as read from file system) for the file
- associated with a bfd.
+ Return the file size (as read from file system) for the file
+ associated with BFD @var{abfd}.
- Note that the initial motivation for, and use of, this routine is not
- so we can get the exact size of the object the bfd applies to, since
- that might not be generally possible (archive members for example?).
- Although it would be ideal if someone could eventually modify
+ The initial motivation for, and use of, this routine is not
+ so we can get the exact size of the object the BFD applies to, since
+ that might not be generally possible (archive members for example).
+ It would be ideal if someone could eventually modify
it so that such results were guaranteed.
Instead, we want to ask questions like "is this NNN byte sized
object I'm about to try read from file offset YYY reasonable?"
- As as example of where we might want to do this, some object formats
- use string tables for which the first sizeof(long) bytes of the table
- contain the size of the table itself, including the size bytes.
+ As as example of where we might do this, some object formats
+ use string tables for which the first <<sizeof (long)>> bytes of the
+ table contain the size of the table itself, including the size bytes.
If an application tries to read what it thinks is one of these
string tables, without some way to validate the size, and for
some reason the size is wrong (byte swapping error, wrong location
- for the string table, etc), the only clue is likely to be a read
+ for the string table, etc.), the only clue is likely to be a read
error when it tries to read the table, or a "virtual memory
- exhausted" error when it tries to allocated 15 bazillon bytes
+ exhausted" error when it tries to allocate 15 bazillon bytes
of space for the 15 bazillon byte table it is about to read.
This function at least allows us to answer the quesion, "is the
size reasonable?".
FILE *fp;
struct stat buf;
+ if ((abfd->flags & BFD_IN_MEMORY) != 0)
+ return ((struct bfd_in_memory *) abfd->iostream)->size;
+
fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), &buf))
+ if (0 != fstat (fileno (fp), & buf))
return 0;
return buf.st_size;
/*
FUNCTION
- The bfd_get_gp_size function
+ bfd_get_gp_size
SYNOPSIS
- int bfd_get_gp_size(bfd *);
+ unsigned int bfd_get_gp_size(bfd *abfd);
DESCRIPTION
- Get the maximum size of objects to be optimized using the GP
- register under MIPS ECOFF. This is typically set by the -G
+ 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.
*/
-int
+unsigned int
bfd_get_gp_size (abfd)
bfd *abfd;
{
- if (abfd->xvec->flavour == bfd_target_ecoff_flavour)
- return ecoff_data (abfd)->gp_size;
+ 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
- The bfd_set_gp_size function
+ bfd_set_gp_size
SYNOPSIS
- void bfd_set_gp_size(bfd *, int);
+ 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 MIPS ECOFF. This is typically set by the -G
- argument to the compiler, assembler or linker.
+ 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 (abfd, i)
bfd *abfd;
- int i;
+ 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 (abfd)
+ bfd *abfd;
+{
+ 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 (abfd, v)
+ bfd *abfd;
+ bfd_vma v;
+{
+ 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 (string, end, base)
+ 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 (bfd_vma) strtoul (string, (char **) end, base);
+
+ 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_bfd_data
+
+SYNOPSIS
+ 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_merge_private_bfd_data
+
+SYNOPSIS
+ boolean bfd_merge_private_bfd_data(bfd *ibfd, bfd *obfd);
+
+DESCRIPTION
+ Merge private BFD information from the BFD @var{ibfd} to the
+ the output file BFD @var{obfd} when linking. 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_merge_private_bfd_data(ibfd, obfd) \
+. BFD_SEND (obfd, _bfd_merge_private_bfd_data, \
+. (ibfd, obfd))
+
+*/
+
+/*
+FUNCTION
+ bfd_set_private_flags
+
+SYNOPSIS
+ 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
stuff
DESCRIPTION
- stuff which should be documented
+ Stuff which should be documented:
.#define bfd_sizeof_headers(abfd, reloc) \
. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
.#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_get_relocated_section_contents(abfd, seclet, data, relocateable) \
-. BFD_SEND (abfd, _bfd_get_relocated_section_contents, (abfd, seclet, data, relocateable))
-.
-.#define bfd_relax_section(abfd, section, symbols) \
-. BFD_SEND (abfd, _bfd_relax_section, (abfd, section, symbols))
+.#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_merge_sections(abfd, link_info) \
+. BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
+.
+.#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_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_seclet_link(abfd, data, relocateable) \
-. BFD_SEND (abfd, _bfd_seclet_link, (abfd, data, relocateable))
+.#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_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
+. PARAMS ((bfd *, struct bfd_link_info *,
+. struct bfd_link_order *, bfd_byte *,
+. boolean, asymbol **));
+.
+
+*/
+
+bfd_byte *
+bfd_get_relocated_section_contents (abfd, link_info, link_order, data,
+ relocateable, symbols)
+ bfd *abfd;
+ struct bfd_link_info *link_info;
+ struct bfd_link_order *link_order;
+ bfd_byte *data;
+ boolean relocateable;
+ asymbol **symbols;
+{
+ bfd *abfd2;
+ bfd_byte *(*fn) PARAMS ((bfd *, struct bfd_link_info *,
+ struct bfd_link_order *, bfd_byte *, 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, relocateable, symbols);
+}
+
+/* Record information about an ELF program header. */
+
+boolean
+bfd_record_phdr (abfd, type, flags_valid, flags, at_valid, at,
+ includes_filehdr, includes_phdrs, count, secs)
+ bfd *abfd;
+ unsigned long type;
+ boolean flags_valid;
+ flagword flags;
+ boolean at_valid;
+ bfd_vma at;
+ boolean includes_filehdr;
+ 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_alloc (abfd, amt);
+ if (m == NULL)
+ return false;
+
+ m->next = NULL;
+ 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_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
+ ;
+ *pm = m;
+
+ return true;
+}
+
+void
+bfd_sprintf_vma (abfd, buf, value)
+ bfd *abfd;
+ char *buf;
+ bfd_vma value;
+{
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+ get_elf_backend_data (abfd)->elf_backend_sprintf_vma (abfd, buf, value);
+ else
+ sprintf_vma (buf, value);
+}
+void
+bfd_fprintf_vma (abfd, stream, value)
+ bfd *abfd;
+ PTR stream;
+ bfd_vma value;
+{
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+ get_elf_backend_data (abfd)->elf_backend_fprintf_vma (abfd, stream, value);
+ else
+ fprintf_vma ((FILE *) stream, value);
+}
+
+/*
+FUNCTION
+ bfd_alt_mach_code
+
+SYNOPSIS
+ boolean bfd_alt_mach_code(bfd *abfd, int index);
+
+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 (index == 0) and any others. Currently,
+ only ELF supports this feature, with up to two alternate
+ machine codes.
*/
+
+boolean
+bfd_alt_mach_code (abfd, index)
+ bfd *abfd;
+ int index;
+{
+ if (bfd_get_flavour (abfd) == bfd_target_elf_flavour)
+ {
+ int code;
+
+ switch (index)
+ {
+ 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;
+}
projects / deliverable / binutils-gdb.git / blobdiff