1389 lines
34 KiB
C
1389 lines
34 KiB
C
/* Generic BFD library interface and support routines.
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Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002
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Free Software Foundation, Inc.
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Written by Cygnus Support.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/*
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SECTION
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<<typedef bfd>>
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A BFD has type <<bfd>>; objects of this type are the
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cornerstone of any application using BFD. Using BFD
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consists of making references though the BFD and to data in the BFD.
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Here is the structure that defines the type <<bfd>>. It
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contains the major data about the file and pointers
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to the rest of the data.
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CODE_FRAGMENT
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.
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.struct _bfd
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.{
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. {* The filename the application opened the BFD with. *}
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. const char *filename;
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.
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. {* A pointer to the target jump table. *}
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. const struct bfd_target *xvec;
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.
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. {* To avoid dragging too many header files into every file that
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. includes `<<bfd.h>>', IOSTREAM has been declared as a "char *",
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. and MTIME as a "long". Their correct types, to which they
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. are cast when used, are "FILE *" and "time_t". The iostream
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. is the result of an fopen on the filename. However, if the
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. BFD_IN_MEMORY flag is set, then iostream is actually a pointer
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. to a bfd_in_memory struct. *}
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. PTR iostream;
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.
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. {* Is the file descriptor being cached? That is, can it be closed as
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. needed, and re-opened when accessed later? *}
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. boolean cacheable;
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.
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. {* Marks whether there was a default target specified when the
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. BFD was opened. This is used to select which matching algorithm
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. to use to choose the back end. *}
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. boolean target_defaulted;
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.
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. {* The caching routines use these to maintain a
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. least-recently-used list of BFDs. *}
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. struct _bfd *lru_prev, *lru_next;
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.
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. {* When a file is closed by the caching routines, BFD retains
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. state information on the file here... *}
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. ufile_ptr where;
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.
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. {* ... and here: (``once'' means at least once). *}
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. boolean opened_once;
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.
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. {* Set if we have a locally maintained mtime value, rather than
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. getting it from the file each time. *}
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. boolean mtime_set;
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.
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. {* File modified time, if mtime_set is true. *}
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. long mtime;
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.
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. {* Reserved for an unimplemented file locking extension. *}
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. int ifd;
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.
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. {* The format which belongs to the BFD. (object, core, etc.) *}
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. bfd_format format;
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.
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. {* The direction with which the BFD was opened. *}
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. enum bfd_direction
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. {
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. no_direction = 0,
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. read_direction = 1,
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. write_direction = 2,
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. both_direction = 3
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. }
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. direction;
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.
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. {* Format_specific flags. *}
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. flagword flags;
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.
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. {* Currently my_archive is tested before adding origin to
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. anything. I believe that this can become always an add of
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. origin, with origin set to 0 for non archive files. *}
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. ufile_ptr origin;
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.
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. {* Remember when output has begun, to stop strange things
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. from happening. *}
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. boolean output_has_begun;
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.
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. {* A hash table for section names. *}
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. struct bfd_hash_table section_htab;
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.
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. {* Pointer to linked list of sections. *}
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. struct sec *sections;
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.
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. {* The place where we add to the section list. *}
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. struct sec **section_tail;
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.
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. {* The number of sections. *}
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. unsigned int section_count;
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.
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. {* Stuff only useful for object files:
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. The start address. *}
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. bfd_vma start_address;
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.
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. {* Used for input and output. *}
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. unsigned int symcount;
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.
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. {* Symbol table for output BFD (with symcount entries). *}
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. struct symbol_cache_entry **outsymbols;
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.
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. {* Used for slurped dynamic symbol tables. *}
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. unsigned int dynsymcount;
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.
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. {* Pointer to structure which contains architecture information. *}
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. const struct bfd_arch_info *arch_info;
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.
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. {* Stuff only useful for archives. *}
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. PTR arelt_data;
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. struct _bfd *my_archive; {* The containing archive BFD. *}
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. struct _bfd *next; {* The next BFD in the archive. *}
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. struct _bfd *archive_head; {* The first BFD in the archive. *}
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. boolean has_armap;
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.
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. {* A chain of BFD structures involved in a link. *}
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. struct _bfd *link_next;
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.
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. {* A field used by _bfd_generic_link_add_archive_symbols. This will
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. be used only for archive elements. *}
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. int archive_pass;
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.
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. {* Used by the back end to hold private data. *}
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. union
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. {
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. struct aout_data_struct *aout_data;
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. struct artdata *aout_ar_data;
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. struct _oasys_data *oasys_obj_data;
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. struct _oasys_ar_data *oasys_ar_data;
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. struct coff_tdata *coff_obj_data;
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. struct pe_tdata *pe_obj_data;
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. struct xcoff_tdata *xcoff_obj_data;
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. struct ecoff_tdata *ecoff_obj_data;
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. struct ieee_data_struct *ieee_data;
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. struct ieee_ar_data_struct *ieee_ar_data;
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. struct srec_data_struct *srec_data;
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. struct ihex_data_struct *ihex_data;
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. struct tekhex_data_struct *tekhex_data;
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. struct elf_obj_tdata *elf_obj_data;
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. struct nlm_obj_tdata *nlm_obj_data;
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. struct bout_data_struct *bout_data;
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. struct mmo_data_struct *mmo_data;
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. struct sun_core_struct *sun_core_data;
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. struct sco5_core_struct *sco5_core_data;
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. struct trad_core_struct *trad_core_data;
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. struct som_data_struct *som_data;
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. struct hpux_core_struct *hpux_core_data;
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. struct hppabsd_core_struct *hppabsd_core_data;
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. struct sgi_core_struct *sgi_core_data;
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. struct lynx_core_struct *lynx_core_data;
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. struct osf_core_struct *osf_core_data;
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. struct cisco_core_struct *cisco_core_data;
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. struct versados_data_struct *versados_data;
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. struct netbsd_core_struct *netbsd_core_data;
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. PTR any;
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. }
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. tdata;
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.
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. {* Used by the application to hold private data. *}
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. PTR usrdata;
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.
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. {* Where all the allocated stuff under this BFD goes. This is a
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. struct objalloc *, but we use PTR to avoid requiring the inclusion of
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. objalloc.h. *}
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. PTR memory;
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.};
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.
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*/
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#include "bfd.h"
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#include "sysdep.h"
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#ifdef ANSI_PROTOTYPES
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#include <stdarg.h>
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#else
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#include <varargs.h>
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#endif
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#include "libiberty.h"
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#include "safe-ctype.h"
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#include "bfdlink.h"
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#include "libbfd.h"
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#include "coff/internal.h"
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#include "coff/sym.h"
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#include "libcoff.h"
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#include "libecoff.h"
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#undef obj_symbols
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#include "elf-bfd.h"
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/* provide storage for subsystem, stack and heap data which may have been
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passed in on the command line. Ld puts this data into a bfd_link_info
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struct which ultimately gets passed in to the bfd. When it arrives, copy
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it to the following struct so that the data will be available in coffcode.h
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where it is needed. The typedef's used are defined in bfd.h */
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/*
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SECTION
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Error reporting
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Most BFD functions return nonzero on success (check their
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individual documentation for precise semantics). On an error,
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they call <<bfd_set_error>> to set an error condition that callers
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can check by calling <<bfd_get_error>>.
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If that returns <<bfd_error_system_call>>, then check
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<<errno>>.
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The easiest way to report a BFD error to the user is to
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use <<bfd_perror>>.
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SUBSECTION
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Type <<bfd_error_type>>
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The values returned by <<bfd_get_error>> are defined by the
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enumerated type <<bfd_error_type>>.
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CODE_FRAGMENT
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.
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.typedef enum bfd_error
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.{
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. bfd_error_no_error = 0,
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. bfd_error_system_call,
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. bfd_error_invalid_target,
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. bfd_error_wrong_format,
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. bfd_error_wrong_object_format,
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. bfd_error_invalid_operation,
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. bfd_error_no_memory,
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. bfd_error_no_symbols,
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. bfd_error_no_armap,
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. bfd_error_no_more_archived_files,
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. bfd_error_malformed_archive,
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. bfd_error_file_not_recognized,
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. bfd_error_file_ambiguously_recognized,
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. bfd_error_no_contents,
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. bfd_error_nonrepresentable_section,
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. bfd_error_no_debug_section,
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. bfd_error_bad_value,
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. bfd_error_file_truncated,
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. bfd_error_file_too_big,
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. bfd_error_invalid_error_code
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.}
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.bfd_error_type;
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.
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*/
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static bfd_error_type bfd_error = bfd_error_no_error;
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const char *const bfd_errmsgs[] =
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{
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N_("No error"),
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N_("System call error"),
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N_("Invalid bfd target"),
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N_("File in wrong format"),
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N_("Archive object file in wrong format"),
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N_("Invalid operation"),
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N_("Memory exhausted"),
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N_("No symbols"),
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N_("Archive has no index; run ranlib to add one"),
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N_("No more archived files"),
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N_("Malformed archive"),
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N_("File format not recognized"),
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N_("File format is ambiguous"),
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N_("Section has no contents"),
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N_("Nonrepresentable section on output"),
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N_("Symbol needs debug section which does not exist"),
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N_("Bad value"),
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N_("File truncated"),
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N_("File too big"),
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N_("#<Invalid error code>")
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};
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/*
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FUNCTION
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bfd_get_error
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SYNOPSIS
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bfd_error_type bfd_get_error (void);
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DESCRIPTION
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Return the current BFD error condition.
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*/
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bfd_error_type
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bfd_get_error ()
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{
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return bfd_error;
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}
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/*
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FUNCTION
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bfd_set_error
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SYNOPSIS
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void bfd_set_error (bfd_error_type error_tag);
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DESCRIPTION
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Set the BFD error condition to be @var{error_tag}.
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*/
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void
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bfd_set_error (error_tag)
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bfd_error_type error_tag;
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{
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bfd_error = error_tag;
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}
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/*
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FUNCTION
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bfd_errmsg
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SYNOPSIS
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const char *bfd_errmsg (bfd_error_type error_tag);
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DESCRIPTION
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Return a string describing the error @var{error_tag}, or
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the system error if @var{error_tag} is <<bfd_error_system_call>>.
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*/
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const char *
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bfd_errmsg (error_tag)
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bfd_error_type error_tag;
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{
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#ifndef errno
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extern int errno;
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#endif
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if (error_tag == bfd_error_system_call)
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return xstrerror (errno);
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if ((((int) error_tag < (int) bfd_error_no_error) ||
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((int) error_tag > (int) bfd_error_invalid_error_code)))
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error_tag = bfd_error_invalid_error_code;/* sanity check */
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return _(bfd_errmsgs [(int)error_tag]);
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}
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/*
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FUNCTION
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bfd_perror
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SYNOPSIS
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void bfd_perror (const char *message);
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DESCRIPTION
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Print to the standard error stream a string describing the
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last BFD error that occurred, or the last system error if
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the last BFD error was a system call failure. If @var{message}
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is non-NULL and non-empty, the error string printed is preceded
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by @var{message}, a colon, and a space. It is followed by a newline.
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*/
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void
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bfd_perror (message)
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const char *message;
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{
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if (bfd_get_error () == bfd_error_system_call)
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/* Must be a system error then. */
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perror ((char *)message);
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else
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{
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if (message == NULL || *message == '\0')
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fprintf (stderr, "%s\n", bfd_errmsg (bfd_get_error ()));
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else
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fprintf (stderr, "%s: %s\n", message, bfd_errmsg (bfd_get_error ()));
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}
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}
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||
|
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/*
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SUBSECTION
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BFD error handler
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||
|
||
Some BFD functions want to print messages describing the
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problem. They call a BFD error handler function. This
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||
function may be overriden by the program.
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||
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The BFD error handler acts like printf.
|
||
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||
CODE_FRAGMENT
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||
.
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||
.typedef void (*bfd_error_handler_type) PARAMS ((const char *, ...));
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||
.
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||
*/
|
||
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||
/* The program name used when printing BFD error messages. */
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||
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||
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
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||
_bfd_default_error_handler VPARAMS ((const char *s, ...))
|
||
{
|
||
if (_bfd_error_program_name != NULL)
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||
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;
|
||
{
|
||
bfd_error_handler_type pold;
|
||
|
||
pold = _bfd_error_handler;
|
||
_bfd_error_handler = 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 (name)
|
||
const char *name;
|
||
{
|
||
_bfd_error_program_name = name;
|
||
}
|
||
|
||
/*
|
||
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_archive_filename
|
||
|
||
SYNOPSIS
|
||
const char *bfd_archive_filename (bfd *);
|
||
|
||
DESCRIPTION
|
||
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);
|
||
}
|
||
|
||
/*
|
||
SECTION
|
||
Symbols
|
||
*/
|
||
|
||
/*
|
||
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 (abfd, asect)
|
||
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 (abfd, asect, location, symbols)
|
||
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.
|
||
|
||
*/
|
||
|
||
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
|
||
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)
|
||
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 (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_get_arch_size
|
||
|
||
SYNOPSIS
|
||
int bfd_get_arch_size (bfd *abfd);
|
||
|
||
DESCRIPTION
|
||
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.
|
||
*/
|
||
|
||
int
|
||
bfd_get_arch_size (abfd)
|
||
bfd *abfd;
|
||
{
|
||
if (abfd->xvec->flavour == bfd_target_elf_flavour)
|
||
return (get_elf_backend_data (abfd))->s->arch_size;
|
||
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
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;
|
||
{
|
||
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
|
||
Make @var{vma} the entry point of output BFD @var{abfd}.
|
||
|
||
RETURNS
|
||
Returns <<true>> on success, <<false>> otherwise.
|
||
*/
|
||
|
||
boolean
|
||
bfd_set_start_address (abfd, vma)
|
||
bfd *abfd;
|
||
bfd_vma vma;
|
||
{
|
||
abfd->start_address = vma;
|
||
return true;
|
||
}
|
||
|
||
/*
|
||
FUNCTION
|
||
bfd_get_mtime
|
||
|
||
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).
|
||
|
||
*/
|
||
|
||
long
|
||
bfd_get_mtime (abfd)
|
||
bfd *abfd;
|
||
{
|
||
FILE *fp;
|
||
struct stat buf;
|
||
|
||
if (abfd->mtime_set)
|
||
return abfd->mtime;
|
||
|
||
fp = bfd_cache_lookup (abfd);
|
||
if (0 != fstat (fileno (fp), &buf))
|
||
return 0;
|
||
|
||
abfd->mtime = buf.st_mtime; /* Save value in case anyone wants it */
|
||
return buf.st_mtime;
|
||
}
|
||
|
||
/*
|
||
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 ((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))
|
||
return 0;
|
||
|
||
return buf.st_size;
|
||
}
|
||
|
||
/*
|
||
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 (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);
|
||
}
|
||
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 (abfd, i)
|
||
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 (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:
|
||
|
||
.#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_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_merge_sections(abfd, link_info) \
|
||
. BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
|
||
.
|
||
.#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_hash_table_free(abfd, hash) \
|
||
. BFD_SEND (abfd, _bfd_link_hash_table_free, (hash))
|
||
.
|
||
.#define bfd_link_add_symbols(abfd, info) \
|
||
. BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
|
||
.
|
||
.#define bfd_link_just_syms(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_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 = (unsigned int) flags_valid;
|
||
m->p_paddr_valid = (unsigned int) at_valid;
|
||
m->includes_filehdr = (unsigned int) includes_filehdr;
|
||
m->includes_phdrs = (unsigned int) 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 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.
|
||
*/
|
||
|
||
boolean
|
||
bfd_alt_mach_code (abfd, alternative)
|
||
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;
|
||
}
|