- /* -*- C -*- */
+/* Generic BFD library interface and support routines.
+ Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
+ Written by Cygnus Support.
-/*** bfd -- binary file diddling routines by Gumby Wallace of Cygnus Support.
- Every definition in this file should be exported and declared
- in bfd.c. If you don't want it to be user-visible, put it in
- libbfd.c!
-*/
-
-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
-
-This file is part of BFD, the Binary File Diddler.
+This file is part of BFD, the Binary File Descriptor library.
-BFD is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-BFD is distributed in the hope that it will be useful,
+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 BFD; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/*
+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
+.
+.struct _bfd
+.{
+. {* The filename the application opened the BFD with. *}
+. CONST char *filename;
+.
+. {* A pointer to the target jump table. *}
+. 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;
+.
+. {* Is the file descriptor being cached? That is, can it be closed as
+. needed, and re-opened when accessed later? *}
+.
+. 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;
+.
+. {* 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: *}
+.
+. file_ptr where;
+.
+. {* and here: (``once'' means at least once) *}
+.
+. boolean opened_once;
+.
+. {* Set if we have a locally maintained mtime value, rather than
+. getting it from the file each time: *}
+.
+. boolean mtime_set;
+.
+. {* File modified time, if mtime_set is true: *}
+.
+. long mtime;
+.
+. {* Reserved for an unimplemented file locking extension.*}
+.
+. int ifd;
+.
+. {* The format which belongs to the BFD. (object, core, etc.) *}
+.
+. bfd_format format;
+.
+. {* The direction the BFD was opened with*}
+.
+. enum bfd_direction {no_direction = 0,
+. read_direction = 1,
+. write_direction = 2,
+. both_direction = 3} direction;
+.
+. {* Format_specific flags*}
+.
+. flagword flags;
+.
+. {* 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. *}
+.
+. file_ptr origin;
+.
+. {* Remember when output has begun, to stop strange things
+. from 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 (with symcount entries) *}
+. 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; {* 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;
+.
+. {* A chain of BFD structures involved in a link. *}
+. struct _bfd *link_next;
+.
+. {* A field used by _bfd_generic_link_add_archive_symbols. This will
+. be used only for archive elements. *}
+. int archive_pass;
+.
+. {* 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 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 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 sun_core_struct *sun_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;
+. PTR any;
+. } tdata;
+.
+. {* Used by the application to hold private data*}
+. PTR usrdata;
+.
+. {* Where all the allocated stuff under this BFD goes *}
+. struct obstack memory;
+.};
+.
+*/
-/* $Id$ */
-#include "sysdep.h"
#include "bfd.h"
+#include "sysdep.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 "libelf.h"
-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.
+/*
+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_invalid_operation,
+. bfd_error_no_memory,
+. bfd_error_no_symbols,
+. 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_invalid_error_code
+.} bfd_error_type;
+.
*/
-bfd_ec bfd_error = no_error;
-
-char *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",
- "#<Invalid error code>"
- };
-
-static
-void
-DEFUN(bfd_nonrepresentable_section,(abfd, name),
- CONST bfd * CONST abfd AND
- CONST char * CONST name)
-{
- printf("bfd error writing file %s, format %s can't represent section %s\n",
- abfd->filename,
- abfd->xvec->name,
- name);
- exit(1);
-}
+#undef strerror
+extern char *strerror();
+
+static bfd_error_type bfd_error = bfd_error_no_error;
+
+CONST char *CONST bfd_errmsgs[] = {
+ "No error",
+ "System call error",
+ "Invalid bfd target",
+ "File in wrong format",
+ "Invalid operation",
+ "Memory exhausted",
+ "No symbols",
+ "No more archived files",
+ "Malformed archive",
+ "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>"
+ };
-bfd_error_vector_type bfd_error_vector =
- {
- bfd_nonrepresentable_section
- };
+/*
+FUNCTION
+ bfd_get_error
-#if !defined(ANSI_LIBRARIES)
-char *
-strerror (code)
- int code;
-{
- extern int sys_nerr;
- extern char *sys_errlist[];
-
- return (((code < 0) || (code >= sys_nerr)) ? "(unknown error)" :
- sys_errlist [code]);
-}
-#endif /* not ANSI_LIBRARIES */
+SYNOPSIS
+ bfd_error_type bfd_get_error (void);
+DESCRIPTION
+ Return the current BFD error condition.
+*/
-char *
-bfd_errmsg (error_tag)
- bfd_ec error_tag;
+bfd_error_type
+bfd_get_error ()
{
-
- if (error_tag == system_call_error)
- return strerror (errno);
-
- if ((((int)error_tag <(int) no_error) ||
- ((int)error_tag > (int)invalid_error_code)))
- error_tag = invalid_error_code;/* sanity check */
-
- return bfd_errmsgs [(int)error_tag];
+ return bfd_error;
}
+/*
+FUNCTION
+ bfd_set_error
-void bfd_default_error_trap(error_tag)
-bfd_ec error_tag;
-{
- printf("bfd assert fail (%s)\n", bfd_errmsg(error_tag));
-}
+SYNOPSIS
+ void bfd_set_error (bfd_error_type error_tag);
-void (*bfd_error_trap)() = bfd_default_error_trap;
-void (*bfd_error_nonrepresentabltrap)() = bfd_default_error_trap;
+DESCRIPTION
+ Set the BFD error condition to be @var{error_tag}.
+*/
void
-DEFUN(bfd_perror,(message),
- CONST char *message)
-{
- 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));
- }
-}
-
-/* for error messages */
-char *
-bfd_format_string (format)
- bfd_format format;
+bfd_set_error (error_tag)
+ bfd_error_type error_tag;
{
- if (((int)format <(int) bfd_unknown) || ((int)format >=(int) bfd_type_end)) return "invalid";
-
- switch (format) {
- case bfd_object: return "object"; /* linker/assember/compiler output */
- case bfd_archive: return "archive"; /* object archive file */
- case bfd_core: return "core"; /* core dump */
- default: return "unknown";
- }
+ bfd_error = error_tag;
}
-\f
-/** Target configurations */
-
-extern bfd_target *target_vector[];
-/* Returns a pointer to the transfer vector for the object target
- named target_name. If target_name is NULL, chooses the one in the
- environment variable GNUTARGET; if that is null or not defined then
- the first entry in the target list is chosen. Passing in the
- string "default" or setting the environment variable to "default"
- will cause the first entry in the target list to be returned. */
-
-bfd_target *
-DEFUN(bfd_find_target,(target_name),
- CONST char *target_name)
-{
- bfd_target **target;
- extern char *getenv ();
- CONST char *targname = (target_name ? target_name : getenv ("GNUTARGET"));
-
- /* This is safe; the vector cannot be null */
- if (targname == NULL || !strcmp (targname, "default"))
- return target_vector[0];
-
- for (target = &target_vector[0]; *target != NULL; target++) {
- if (!strcmp (targname, (*target)->name))
- return *target;
- }
-
- bfd_error = invalid_target;
- return NULL;
-}
-
-/* Returns a freshly-consed, NULL-terminated vector of the names of all the
- valid bfd targets. Do not modify the names */
-
-char **
-bfd_target_list ()
-{
- int vec_length= 0;
- bfd_target **target;
- char **name_list, **name_ptr;
-
- for (target = &target_vector[0]; *target != NULL; target++)
- vec_length++;
-
- name_ptr = name_list = (char **) zalloc ((vec_length + 1) * sizeof (char **));
-
- if (name_list == NULL) {
- bfd_error = no_memory;
- return NULL;
- }
-
- for (target = &target_vector[0]; *target != NULL; target++)
- *(name_ptr++) = (*target)->name;
-
- return name_list;
-}
-\f
-/** Init a bfd for read of the proper format.
- */
+/*
+FUNCTION
+ bfd_errmsg
-/* We should be able to find out if the target was defaulted or user-specified.
- If the user specified the target explicitly then we should do no search.
- I guess the best way to do this is to pass an extra argument which specifies
- the DWIM. */
+SYNOPSIS
+ CONST char *bfd_errmsg (bfd_error_type error_tag);
-/* I have chanegd this always to set the filepos to the origin before
- guessing. -- Gumby, 14 Februar 1991*/
+DESCRIPTION
+ Return a string describing the error @var{error_tag}, or
+ the system error if @var{error_tag} is <<bfd_error_system_call>>.
+*/
-boolean
-bfd_check_format (abfd, format)
- bfd *abfd;
- bfd_format format;
+CONST char *
+bfd_errmsg (error_tag)
+ bfd_error_type error_tag;
{
- bfd_target **target, *save_targ, *right_targ;
- int match_count;
-
- if (!bfd_read_p (abfd) ||
- ((int)(abfd->format) < (int)bfd_unknown) ||
- ((int)(abfd->format) >= (int)bfd_type_end)) {
- bfd_error = invalid_operation;
- return false;
- }
-
- if (abfd->format != bfd_unknown) return (abfd->format == format) ? true:false;
-
- /* presume the answer is yes */
- abfd->format = format;
-
- bfd_seek (abfd, (file_ptr)0, SEEK_SET); /* rewind! */
-
- right_targ = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
- if (right_targ) {
- abfd->xvec = right_targ; /* Set the target as returned */
- return true; /* File position has moved, BTW */
- }
-
- /* This isn't a <format> file in the specified or defaulted target type.
- See if we recognize it for any other target type. (We check them
- all to make sure it's uniquely recognized.) */
-
- save_targ = abfd->xvec;
- match_count = 0;
- right_targ = 0;
-
- for (target = target_vector; *target != NULL; target++) {
- bfd_target *temp;
-
- abfd->xvec = *target; /* Change BFD's target temporarily */
- bfd_seek (abfd, (file_ptr)0, SEEK_SET);
- temp = BFD_SEND_FMT (abfd, _bfd_check_format, (abfd));
- if (temp) { /* This format checks out as ok! */
- right_targ = temp;
- match_count++;
-#ifdef GNU960
- /* Big- and little-endian b.out archives look the same, but it doesn't
- * matter: there is no difference in their headers, and member file byte
- * orders will (I hope) be handled appropriately by bfd. Ditto for big
- * and little coff archives. And the 4 coff/b.out object formats are
- * unambiguous. So accept the first match we find.
- */
- break;
+#ifndef errno
+ extern int errno;
#endif
- }
- }
-
- if (match_count == 1) {
- abfd->xvec = right_targ; /* Change BFD's target permanently */
- return true; /* File position has moved, BTW */
- }
-
- abfd->xvec = save_targ; /* Restore original target type */
- abfd->format = bfd_unknown; /* Restore original format */
- bfd_error = ((match_count == 0) ? file_not_recognized :
- file_ambiguously_recognized);
- return false;
-}
-
-boolean
-bfd_set_format (abfd, format)
- bfd *abfd;
- bfd_format format;
-{
-
- if (bfd_read_p (abfd) ||
- ((int)abfd->format < (int)bfd_unknown) ||
- ((int)abfd->format >= (int)bfd_type_end)) {
- bfd_error = invalid_operation;
- return false;
- }
-
- if (abfd->format != bfd_unknown) return (abfd->format == format) ? true:false;
-
- /* presume the answer is yes */
- abfd->format = format;
-
- if (!BFD_SEND_FMT (abfd, _bfd_set_format, (abfd))) {
- abfd->format = bfd_unknown;
- return false;
- }
-
- return true;
-}
-\f
-/* Hack object and core file sections */
-
-sec_ptr
-DEFUN(bfd_get_section_by_name,(abfd, name),
- bfd *abfd AND
- CONST char *name)
-{
- asection *sect;
-
- for (sect = abfd->sections; sect != NULL; sect = sect->next)
- if (!strcmp (sect->name, name)) return sect;
- return NULL;
-}
-
-/* If you try to create a section with a name which is already in use,
- returns the old section by that name instead. */
-sec_ptr
-DEFUN(bfd_make_section,(abfd, name),
- bfd *abfd AND
- CONST char *name)
-{
- asection *newsect;
- asection ** prev = &abfd->sections;
- asection * sect = abfd->sections;
-
- if (abfd->output_has_begun) {
- bfd_error = invalid_operation;
- return NULL;
- }
-
- while (sect) {
- if (!strcmp(sect->name, name)) return sect;
- prev = §->next;
- sect = sect->next;
- }
-
- newsect = (asection *) bfd_zalloc(abfd, sizeof (asection));
- if (newsect == NULL) {
- bfd_error = no_memory;
- return NULL;
- }
-
- newsect->name = name;
- newsect->index = abfd->section_count++;
- newsect->flags = SEC_NO_FLAGS;
-
- newsect->userdata = 0;
- newsect->next = (asection *)NULL;
- newsect->relocation = (arelent *)NULL;
- newsect->reloc_count = 0;
- newsect->line_filepos =0;
+ if (error_tag == bfd_error_system_call)
+ return strerror (errno);
- if (BFD_SEND (abfd, _new_section_hook, (abfd, newsect)) != true) {
- free (newsect);
- return NULL;
- }
+ 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 */
- *prev = newsect;
- return newsect;
+ return bfd_errmsgs [(int)error_tag];
}
-/* Call operation on each section. Operation gets three args: the bfd,
- the section, and a void * pointer (whatever the user supplied). */
+/*
+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.
+*/
-/* This is attractive except that without lexical closures its use is hard
- to make reentrant. */
-/*VARARGS2*/
void
-bfd_map_over_sections (abfd, operation, user_storage)
- bfd *abfd;
- void (*operation)();
- PTR user_storage;
-{
- asection *sect;
- int i = 0;
-
- for (sect = abfd->sections; sect != NULL; i++, sect = sect->next)
- (*operation) (abfd, sect, user_storage);
-
- if (i != abfd->section_count) /* Debugging */
- abort();
-}
-
-boolean
-bfd_set_section_flags (abfd, section, flags)
- bfd *abfd;
- sec_ptr section;
- flagword flags;
-{
- if ((flags & bfd_applicable_section_flags (abfd)) != flags) {
- bfd_error = invalid_operation;
- return false;
- }
-
- section->flags = flags;
-return true;
-}
-
-
-boolean
-bfd_set_section_size (abfd, ptr, val)
- bfd *abfd;
- sec_ptr ptr;
- unsigned long val;
-{
- /* Once you've started writing to any section you cannot create or change
- the size of any others. */
-
- if (abfd->output_has_begun) {
- bfd_error = invalid_operation;
- return false;
- }
-
- ptr->size = val;
-
- return true;
-}
-
-boolean
-bfd_set_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- int count;
-{
- if (!(bfd_get_section_flags(abfd, section) &
- SEC_HAS_CONTENTS)) {
- bfd_error = no_contents;
- return(false);
- } /* if section has no contents */
-
- if (BFD_SEND (abfd, _bfd_set_section_contents,
- (abfd, section, location, offset, count))) {
- abfd->output_has_begun = true;
- return true;
- }
-
- return false;
-}
-
-boolean
-bfd_get_section_contents (abfd, section, location, offset, count)
- bfd *abfd;
- sec_ptr section;
- PTR location;
- file_ptr offset;
- int count;
+bfd_perror (message)
+ CONST char *message;
{
- if (section->flags & SEC_CONSTRUCTOR) {
- memset(location, 0, count);
- return true;
- }
+ if (bfd_get_error () == bfd_error_system_call)
+ perror((char *)message); /* must be system error then... */
else {
- return (BFD_SEND (abfd, _bfd_get_section_contents,
- (abfd, section, location, offset, count)));
+ 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 ()));
}
}
\f
-/** Some core file info commands */
-
-/* Returns a read-only string explaining what program was running when
- it failed. */
+/*
+SECTION
+ Symbols
+*/
-char *
-bfd_core_file_failing_command (abfd)
- bfd *abfd;
-{
- if (abfd->format != bfd_core) {
- bfd_error = invalid_operation;
- return NULL;
- }
- return BFD_SEND (abfd, _core_file_failing_command, (abfd));
-}
+/*
+FUNCTION
+ bfd_get_reloc_upper_bound
-int
-bfd_core_file_failing_signal (abfd)
- bfd *abfd;
-{
- if (abfd->format != bfd_core) {
- bfd_error = invalid_operation;
- return NULL;
- }
- return BFD_SEND (abfd, _core_file_failing_signal, (abfd));
-}
+SYNOPSIS
+ unsigned int bfd_get_reloc_upper_bound(bfd *abfd, asection *sect);
-boolean
-core_file_matches_executable_p (core_bfd, exec_bfd)
- bfd *core_bfd, *exec_bfd;
-{
- if ((core_bfd->format != bfd_core) || (exec_bfd->format != bfd_object)) {
- bfd_error = wrong_format;
- return false;
- }
+DESCRIPTION
+ Return the number of bytes required to store the
+ relocation information associated with section @var{sect}
+ attached to bfd @var{abfd}.
- return BFD_SEND (core_bfd, _core_file_matches_executable_p, (core_bfd, exec_bfd));
-}
-\f
-/** Symbols */
-
-boolean
-bfd_set_symtab (abfd, location, symcount)
- bfd *abfd;
- asymbol **location;
- unsigned int symcount;
-{
- if ((abfd->format != bfd_object) || (bfd_read_p (abfd))) {
- bfd_error = invalid_operation;
- return false;
- }
+*/
- bfd_get_outsymbols (abfd) = location;
- bfd_get_symcount (abfd) = symcount;
- return true;
-}
-/* returns the number of octets of storage required */
unsigned int
-get_reloc_upper_bound (abfd, asect)
+bfd_get_reloc_upper_bound (abfd, asect)
bfd *abfd;
sec_ptr asect;
{
if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
+ bfd_set_error (bfd_error_invalid_operation);
return 0;
}
return BFD_SEND (abfd, _get_reloc_upper_bound, (abfd, asect));
}
+/*
+FUNCTION
+ bfd_canonicalize_reloc
+
+SYNOPSIS
+ unsigned int 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>>.
+
+ The @var{syms} table is also needed for horrible internal magic
+ reasons.
+
+
+*/
unsigned int
bfd_canonicalize_reloc (abfd, asect, location, symbols)
bfd *abfd;
asymbol **symbols;
{
if (abfd->format != bfd_object) {
- bfd_error = invalid_operation;
+ bfd_set_error (bfd_error_invalid_operation);
return 0;
}
-
- return BFD_SEND (abfd, _bfd_canonicalize_reloc, (abfd, asect, location, symbols));
+ 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.
+
+*/
+/*ARGSUSED*/
void
-bfd_print_symbol_vandf(file, symbol)
-PTR file;
-asymbol *symbol;
+bfd_set_reloc (ignore_abfd, asect, location, count)
+ bfd *ignore_abfd;
+ sec_ptr asect;
+ arelent **location;
+ unsigned int count;
{
- flagword type = symbol->flags;
- if (symbol->section != (asection *)NULL)
- {
- fprintf(file,"%08lx ", symbol->value+symbol->section->vma);
- }
- else
- {
- fprintf(file,"%08lx ", symbol->value);
- }
- fprintf(file,"%c%c%c%c%c%c%c",
- (type & BSF_LOCAL) ? 'l':' ',
- (type & BSF_GLOBAL) ? 'g' : ' ',
- (type & BSF_IMPORT) ? 'i' : ' ',
- (type & BSF_EXPORT) ? 'e' : ' ',
- (type & BSF_UNDEFINED) ? 'u' : ' ',
- (type & BSF_FORT_COMM) ? 'c' : ' ',
- (type & BSF_DEBUGGING) ? 'd' :' ');
-
+ asect->orelocation = location;
+ asect->reloc_count = count;
}
+/*
+FUNCTION
+ bfd_set_file_flags
+
+SYNOPSIS
+ 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.
+
+*/
boolean
bfd_set_file_flags (abfd, flags)
flagword flags;
{
if (abfd->format != bfd_object) {
- bfd_error = wrong_format;
+ bfd_set_error (bfd_error_wrong_format);
return false;
}
if (bfd_read_p (abfd)) {
- bfd_error = invalid_operation;
+ 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;
+ bfd_set_error (bfd_error_invalid_operation);
return false;
}
- bfd_get_file_flags (abfd) = flags;
return true;
}
-
void
-bfd_set_reloc (ignore_abfd, asect, location, count)
- bfd *ignore_abfd;
- sec_ptr asect;
- arelent **location;
- unsigned int count;
+bfd_assert(file, line)
+char *file;
+int line;
{
- asect->orelocation = location;
- asect->reloc_count = count;
+ fprintf(stderr, "bfd assertion fail %s:%d\n",file,line);
}
+
+
/*
-If an output_bfd is supplied to this function the generated image
-will be relocatable, the relocations are copied to the output file
-after they have been changed to reflect the new state of the world.
-There are two ways of reflecting the results of partial linkage in an
-output file; by modifying the output data in place, and by modifying
-the relocation record. Some native formats (eg basic a.out and basic
-coff) have no way of specifying an addend in the relocation type, so
-the addend has to go in the output data. This is no big deal since in
-these formats the output data slot will always be big enough for the
-addend. Complex reloc types with addends were invented to solve just
-this problem.
+FUNCTION
+ bfd_set_start_address
+
+SYNOPSIS
+ 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_reloc_status_enum_type
-bfd_perform_relocation(abfd,
- reloc_entry,
- data,
- input_section,
- output_bfd)
+boolean
+bfd_set_start_address(abfd, vma)
bfd *abfd;
-arelent *reloc_entry;
-PTR data;
-asection *input_section;
-bfd *output_bfd;
+bfd_vma vma;
{
- bfd_vma relocation;
- bfd_reloc_status_enum_type flag = bfd_reloc_ok;
- bfd_vma relocation_before;
- bfd_vma addr = reloc_entry->address ;
- bfd_vma output_base = 0;
- reloc_howto_type *howto = reloc_entry->howto;
- asection *reloc_target_output_section;
- asection *reloc_target_input_section;
- asymbol *symbol;
-
- if (reloc_entry->sym_ptr_ptr) {
- symbol = *( reloc_entry->sym_ptr_ptr);
- if ((symbol->flags & BSF_UNDEFINED) && output_bfd == (bfd *)NULL) {
- flag = bfd_reloc_undefined;
- }
- }
- else {
- symbol = (asymbol*)NULL;
- }
-
- if (howto->special_function){
- bfd_reloc_status_enum_type cont;
- cont = howto->special_function(abfd,
- reloc_entry,
- symbol,
- data,
- input_section);
- if (cont != bfd_reloc_continue) return cont;
- }
+ abfd->start_address = vma;
+ return true;
+}
- /*
- Work out which section the relocation is targetted at and the
- initial relocation command value.
- */
+/*
+FUNCTION
+ bfd_get_mtime
- if (symbol != (asymbol *)NULL){
- if (symbol->flags & BSF_FORT_COMM) {
- relocation = 0;
- }
- else {
- relocation = symbol->value;
- }
- if (symbol->section != (asection *)NULL)
- {
- reloc_target_input_section = symbol->section;
- }
- else {
- reloc_target_input_section = (asection *)NULL;
- }
- }
- else if (reloc_entry->section != (asection *)NULL)
- {
- relocation = 0;
- reloc_target_input_section = reloc_entry->section;
- }
- else {
- relocation = 0;
- reloc_target_input_section = (asection *)NULL;
- }
+SYNOPSIS
+ long bfd_get_mtime(bfd *abfd);
+DESCRIPTION
+ Return the file modification time (as read from the file system, or
+ from the archive header for archive members).
- if (reloc_target_input_section != (asection *)NULL) {
+*/
- reloc_target_output_section =
- reloc_target_input_section->output_section;
+long
+bfd_get_mtime (abfd)
+ bfd *abfd;
+{
+ FILE *fp;
+ struct stat buf;
- if (output_bfd && howto->partial_inplace==false) {
- output_base = 0;
- }
- else {
- output_base = reloc_target_output_section->vma;
+ if (abfd->mtime_set)
+ return abfd->mtime;
- }
+ fp = bfd_cache_lookup (abfd);
+ if (0 != fstat (fileno (fp), &buf))
+ return 0;
- relocation += output_base + reloc_target_input_section->output_offset;
- }
+ abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
+ return buf.st_mtime;
+}
- relocation += reloc_entry->addend ;
+/*
+FUNCTION
+ bfd_get_size
+
+SYNOPSIS
+ long bfd_get_size(bfd *abfd);
+
+DESCRIPTION
+ Return the file size (as read from file system) for the file
+ associated with BFD @var{abfd}.
+
+ 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 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
+ error when it tries to read the table, or a "virtual memory
+ 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?".
+*/
+long
+bfd_get_size (abfd)
+ bfd *abfd;
+{
+ FILE *fp;
+ struct stat buf;
- if(reloc_entry->address > (bfd_vma)(input_section->size))
- {
- return bfd_reloc_outofrange;
- }
-
+ fp = bfd_cache_lookup (abfd);
+ if (0 != fstat (fileno (fp), &buf))
+ return 0;
- if (howto->pc_relative == true)
- {
- /*
- Anything which started out as pc relative should end up that
- way too.
+ return buf.st_size;
+}
- There are two ways we can see a pcrel instruction. Sometimes
- the pcrel displacement has been partially calculated, it
- includes the distance from the start of the section to the
- instruction in it (eg sun3), and sometimes the field is
- totally blank - eg m88kbcs.
- */
+/*
+FUNCTION
+ bfd_get_gp_size
-
- relocation -=
- output_base + input_section->output_offset;
+SYNOPSIS
+ int bfd_get_gp_size(bfd *abfd);
- if (howto->pcrel_offset == true) {
- relocation -= reloc_entry->address;
- }
+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.
+*/
- }
-
- if (output_bfd!= (bfd *)NULL) {
- if ( howto->partial_inplace == false) {
- /*
- This is a partial relocation, and we want to apply the relocation
- to the reloc entry rather than the raw data. Modify the reloc
- inplace to reflect what we now know.
- */
- reloc_entry->addend = relocation ;
- reloc_entry->section = reloc_target_input_section;
- if (reloc_target_input_section != (asection *)NULL) {
- /* If we know the output section we can forget the symbol */
- reloc_entry->sym_ptr_ptr = (asymbol**)NULL;
- }
- reloc_entry->address +=
- input_section->output_offset;
- return flag;
+int
+bfd_get_gp_size (abfd)
+ 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);
}
- else
- {
- /* This is a partial relocation, but inplace, so modify the
- reloc record a bit
- */
+ return 0;
+}
- }
- }
+/*
+FUNCTION
+ bfd_set_gp_size
- reloc_entry->addend = 0;
-
-
- /*
- Either we are relocating all the way, or we don't want to apply
- the relocation to the reloc entry (probably because there isn't
- any room in the output format to describe addends to relocs)
- */
- relocation >>= howto->rightshift;
-
- /* Shift everything up to where it's going to be used */
-
- relocation <<= howto->bitpos;
-
-
- /* Wait for the day when all have the mask in them */
-
-
-
- relocation_before = relocation;
-
-
- /* What we do:
- i instruction to be left alone
- o offset within instruction
- r relocation offset to apply
- S src mask
- D dst mask
- N ~dst mask
- A part 1
- B part 2
- R result
-
- Do this:
- i i i i i o o o o o from bfd_get<size>
- and S S S S S to get the size offset we want
- + r r r r r r r r r r to get the final value to place
- and D D D D D to chop to right size
- -----------------------
- A A A A A
- And this:
- ... i i i i i o o o o o from bfd_get<size>
- and N N N N N get instruction
- -----------------------
- ... B B B B B
-
- And then:
- B B B B B
- or A A A A A
- -----------------------
- R R R R R R R R R R put into bfd_put<size>
- */
-
-#define DOIT(x) \
- x = ( (x & ~howto->dst_mask) | (((x & howto->src_mask) + relocation) & howto->dst_mask))
-
- switch (howto->size)
- {
- case 0:
- {
- char x = bfd_getchar(abfd, (char *)data + addr);
- DOIT(x);
- bfd_putchar(abfd,x, (unsigned char *) data + addr);
- }
- break;
-
- case 1:
- {
- short x = bfd_getshort(abfd, (bfd_byte *)data + addr);
- DOIT(x);
- bfd_putshort(abfd, x, (unsigned char *)data + addr);
- }
- break;
- case 2:
- {
- long x = bfd_getlong(abfd, (bfd_byte *) data + addr);
- DOIT(x);
- bfd_putlong(abfd,x, (bfd_byte *)data + addr);
- }
- break;
- case 3:
- /* Do nothing */
- break;
- default:
- return bfd_reloc_other;
- }
+SYNOPSIS
+ void bfd_set_gp_size(bfd *abfd, int i);
- return flag;
-}
+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_assert(file, line)
-char *file;
-int line;
+bfd_set_gp_size (abfd, i)
+ bfd *abfd;
+ int i;
{
- printf("bfd assertion fail %s:%d\n",file,line);
+ /* 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;
}
+/*
+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.
+
+ Overflow is not detected.
+*/
-boolean
-bfd_set_start_address(abfd, vma)
-bfd *abfd;
-bfd_vma vma;
+bfd_vma
+bfd_scan_vma (string, end, base)
+ CONST char *string;
+ CONST char **end;
+ int base;
{
- abfd->start_address = vma;
- return true;
-}
+ bfd_vma value;
+ int digit;
+ /* Let the host do it if possible. */
+ if (sizeof(bfd_vma) <= sizeof(unsigned long))
+ return (bfd_vma) strtoul (string, 0, base);
-bfd_vma bfd_log2(x)
-bfd_vma x;
-{
- bfd_vma result = 0;
- while ( (bfd_vma)(1<< result) < x)
- result++;
- return result;
-}
+ /* A negative base makes no sense, and we only need to go as high as hex. */
+ if ((base < 0) || (base > 16))
+ return (bfd_vma) 0;
-/* bfd_get_mtime: Return cached file modification time (e.g. as read
- from archive header for archive members, or from file system if we have
- been called before); else determine modify time, cache it, and
- return it. */
+ if (base == 0)
+ {
+ if (string[0] == '0')
+ {
+ if ((string[1] == 'x') || (string[1] == 'X'))
+ base = 16;
+ /* XXX should we also allow "0b" or "0B" to set base to 2? */
+ else
+ base = 8;
+ }
+ else
+ base = 10;
+ }
+ if ((base == 16) &&
+ (string[0] == '0') && ((string[1] == 'x') || (string[1] == 'X')))
+ string += 2;
+ /* XXX should we also skip over "0b" or "0B" if base is 2? */
+
+/* Speed could be improved with a table like hex_value[] in gas. */
+#define HEX_VALUE(c) \
+ (isxdigit(c) ? \
+ (isdigit(c) ? \
+ (c - '0') : \
+ (10 + c - (islower(c) ? 'a' : 'A'))) : \
+ 42)
+
+ for (value = 0; (digit = HEX_VALUE(*string)) < base; string++)
+ {
+ value = value * base + digit;
+ }
-long
-bfd_get_mtime (abfd)
- bfd *abfd;
-{
- FILE *fp;
- struct stat buf;
+ if (end)
+ *end = string;
- if (abfd->mtime_set)
- return abfd->mtime;
+ return value;
+}
- fp = bfd_cache_lookup (abfd);
- if (0 != fstat (fileno (fp), &buf))
- return 0;
+/*
+FUNCTION
+ stuff
+
+DESCRIPTION
+ Stuff which should be documented:
+
+.#define bfd_sizeof_headers(abfd, reloc) \
+. BFD_SEND (abfd, _bfd_sizeof_headers, (abfd, reloc))
+.
+.#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
+. BFD_SEND (abfd, _bfd_find_nearest_line, (abfd, sec, syms, off, file, func, line))
+.
+. {* Do these three do anything useful at all, for any back end? *}
+.#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_set_arch_mach(abfd, arch, mach)\
+. BFD_SEND ( abfd, _bfd_set_arch_mach, (abfd, arch, mach))
+.
+.#define bfd_get_relocated_section_contents(abfd, link_info, link_order, data, relocateable, symbols) \
+. BFD_SEND (abfd, _bfd_get_relocated_section_contents, \
+. (abfd, link_info, link_order, data, relocateable, symbols))
+.
+.#define bfd_relax_section(abfd, section, link_info, symbols) \
+. BFD_SEND (abfd, _bfd_relax_section, \
+. (abfd, section, link_info, symbols))
+.
+.#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))
+.
- abfd->mtime_set = true;
- abfd->mtime = buf.st_mtime;
- return abfd->mtime;
-}
+*/
projects / binutils.git / blobdiff