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[platform/upstream/binutils.git] / bfd / bfd.c

diff --git a/bfd/bfd.c b/bfd/bfd.c
index 227e26b..2d9397b 100644 (file)
--- a/bfd/bfd.c
+++ b/bfd/bfd.c
@@ -1,7 +1,5 @@
 /* Generic BFD library interface and support routines.
 /* Generic BFD library interface and support routines.

-   Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
-   Free Software Foundation, Inc.
+   Copyright (C) 1990-2014 Free Software Foundation, Inc.

    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.
    Written by Cygnus Support.
 
    This file is part of BFD, the Binary File Descriptor library.


@@ -22,6 +20,9 @@
    MA 02110-1301, USA.  */
 
 /*
    MA 02110-1301, USA.  */
 
 /*

+INODE
+typedef bfd, Error reporting, BFD front end, BFD front end
+

 SECTION
        <<typedef bfd>>
 
 SECTION
        <<typedef bfd>>
 


@@ -45,9 +46,6 @@ CODE_FRAGMENT
 .
 .struct bfd
 .{
 .
 .struct bfd
 .{

-.  {* A unique identifier of the BFD  *}
-.  unsigned int id;
-.

 .  {* The filename the application opened the BFD with.  *}
 .  const char *filename;
 .
 .  {* The filename the application opened the BFD with.  *}
 .  const char *filename;
 .


@@ -70,17 +68,17 @@ CODE_FRAGMENT
 .  {* File modified time, if mtime_set is TRUE.  *}
 .  long mtime;
 .
 .  {* File modified time, if mtime_set is TRUE.  *}
 .  long mtime;
 .

-.  {* Reserved for an unimplemented file locking extension.  *}
-.  int ifd;
+.  {* A unique identifier of the BFD  *}
+.  unsigned int id;

 .
 .  {* The format which belongs to the BFD. (object, core, etc.)  *}
 .
 .  {* The format which belongs to the BFD. (object, core, etc.)  *}

-.  bfd_format format;
+.  ENUM_BITFIELD (bfd_format) format : 3;

 .
 .  {* The direction with which the BFD was opened.  *}
 .
 .  {* The direction with which the BFD was opened.  *}

-.  enum bfd_direction direction;
+.  ENUM_BITFIELD (bfd_direction) direction : 2;

 .
 .  {* Format_specific flags.  *}
 .
 .  {* Format_specific flags.  *}

-.  flagword flags;
+.  flagword flags : 17;

 .
 .  {* Values that may appear in the flags field of a BFD.  These also
 .     appear in the object_flags field of the bfd_target structure, where
 .
 .  {* Values that may appear in the flags field of a BFD.  These also
 .     appear in the object_flags field of the bfd_target structure, where


@@ -139,26 +137,23 @@ CODE_FRAGMENT
 .     struct.  *}
 .#define BFD_IN_MEMORY 0x800
 .
 .     struct.  *}
 .#define BFD_IN_MEMORY 0x800
 .

-.  {* The sections in this BFD specify a memory page.  *}
-.#define HAS_LOAD_PAGE 0x1000
-.

 .  {* This BFD has been created by the linker and doesn't correspond
 .     to any input file.  *}
 .  {* This BFD has been created by the linker and doesn't correspond
 .     to any input file.  *}

-.#define BFD_LINKER_CREATED 0x2000
+.#define BFD_LINKER_CREATED 0x1000

 .
 .  {* This may be set before writing out a BFD to request that it
 .     be written using values for UIDs, GIDs, timestamps, etc. that
 .     will be consistent from run to run.  *}
 .
 .  {* This may be set before writing out a BFD to request that it
 .     be written using values for UIDs, GIDs, timestamps, etc. that
 .     will be consistent from run to run.  *}

-.#define BFD_DETERMINISTIC_OUTPUT 0x4000
+.#define BFD_DETERMINISTIC_OUTPUT 0x2000

 .
 .  {* Compress sections in this BFD.  *}
 .
 .  {* Compress sections in this BFD.  *}

-.#define BFD_COMPRESS 0x8000
+.#define BFD_COMPRESS 0x4000

 .
 .  {* Decompress sections in this BFD.  *}
 .
 .  {* Decompress sections in this BFD.  *}

-.#define BFD_DECOMPRESS 0x10000
+.#define BFD_DECOMPRESS 0x8000

 .
 .  {* BFD is a dummy, for plugins.  *}
 .
 .  {* BFD is a dummy, for plugins.  *}

-.#define BFD_PLUGIN 0x20000
+.#define BFD_PLUGIN 0x10000

 .
 .  {* Flags bits to be saved in bfd_preserve_save.  *}
 .#define BFD_FLAGS_SAVED \
 .
 .  {* Flags bits to be saved in bfd_preserve_save.  *}
 .#define BFD_FLAGS_SAVED \


@@ -169,6 +164,42 @@ CODE_FRAGMENT
 .  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
 .   | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
 .
 .  (BFD_IN_MEMORY | BFD_COMPRESS | BFD_DECOMPRESS | BFD_LINKER_CREATED \
 .   | BFD_PLUGIN | BFD_TRADITIONAL_FORMAT | BFD_DETERMINISTIC_OUTPUT)
 .

+.  {* Is the file descriptor being cached?  That is, can it be closed as
+.     needed, and re-opened when accessed later?  *}
+.  unsigned int cacheable : 1;
+.
+.  {* Marks whether there was a default target specified when the
+.     BFD was opened. This is used to select which matching algorithm
+.     to use to choose the back end.  *}
+.  unsigned int target_defaulted : 1;
+.
+.  {* ... and here: (``once'' means at least once).  *}
+.  unsigned int opened_once : 1;
+.
+.  {* Set if we have a locally maintained mtime value, rather than
+.     getting it from the file each time.  *}
+.  unsigned int mtime_set : 1;
+.
+.  {* Flag set if symbols from this BFD should not be exported.  *}
+.  unsigned int no_export : 1;
+.
+.  {* Remember when output has begun, to stop strange things
+.     from happening.  *}
+.  unsigned int output_has_begun : 1;
+.
+.  {* Have archive map.  *}
+.  unsigned int has_armap : 1;
+.
+.  {* Set if this is a thin archive.  *}
+.  unsigned int is_thin_archive : 1;
+.
+.  {* Set if only required symbols should be added in the link hash table for
+.     this object.  Used by VMS linkers.  *}
+.  unsigned int selective_search : 1;
+.
+.  {* Set if this is the linker output BFD.  *}
+.  unsigned int is_linker_output : 1;
+.

 .  {* 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.  *}
 .  {* 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.  *}


@@ -193,17 +224,21 @@ CODE_FRAGMENT
 .  {* The number of sections.  *}
 .  unsigned int section_count;
 .
 .  {* The number of sections.  *}
 .  unsigned int section_count;
 .

+.  {* A field used by _bfd_generic_link_add_archive_symbols.  This will
+.     be used only for archive elements.  *}
+.  int archive_pass;
+.

 .  {* Stuff only useful for object files:
 .     The start address.  *}
 .  bfd_vma start_address;
 .
 .  {* 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).
 .     Also used by the linker to cache input BFD symbols.  *}
 .  struct bfd_symbol  **outsymbols;
 .
 .  {* Symbol table for output BFD (with symcount entries).
 .     Also used by the linker to cache input BFD symbols.  *}
 .  struct bfd_symbol  **outsymbols;
 .

+.  {* Used for input and output.  *}
+.  unsigned int symcount;
+.

 .  {* Used for slurped dynamic symbol tables.  *}
 .  unsigned int dynsymcount;
 .
 .  {* Used for slurped dynamic symbol tables.  *}
 .  unsigned int dynsymcount;
 .


@@ -218,12 +253,12 @@ CODE_FRAGMENT
 .  struct bfd *nested_archives; {* List of nested archive in a flattened
 .                                  thin archive.  *}
 .
 .  struct bfd *nested_archives; {* List of nested archive in a flattened
 .                                  thin archive.  *}
 .

-.  {* 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;
+.  union {
+.    {* For input BFDs, a chain of BFDs involved in a link.  *}
+.    struct bfd *next;
+.    {* For output BFD, the linker hash table.  *}
+.    struct bfd_link_hash_table *hash;
+.  } link;

 .
 .  {* Used by the back end to hold private data.  *}
 .  union
 .
 .  {* Used by the back end to hold private data.  *}
 .  union


@@ -275,41 +310,16 @@ CODE_FRAGMENT
 .     struct objalloc *, but we use void * to avoid requiring the inclusion
 .     of objalloc.h.  *}
 .  void *memory;
 .     struct objalloc *, but we use void * to avoid requiring the inclusion
 .     of objalloc.h.  *}
 .  void *memory;

-.
-.  {* Is the file descriptor being cached?  That is, can it be closed as
-.     needed, and re-opened when accessed later?  *}
-.  unsigned int cacheable : 1;
-.
-.  {* Marks whether there was a default target specified when the
-.     BFD was opened. This is used to select which matching algorithm
-.     to use to choose the back end.  *}
-.  unsigned int target_defaulted : 1;
-.
-.  {* ... and here: (``once'' means at least once).  *}
-.  unsigned int opened_once : 1;
-.
-.  {* Set if we have a locally maintained mtime value, rather than
-.     getting it from the file each time.  *}
-.  unsigned int mtime_set : 1;
-.
-.  {* Flag set if symbols from this BFD should not be exported.  *}
-.  unsigned int no_export : 1;
-.
-.  {* Remember when output has begun, to stop strange things
-.     from happening.  *}
-.  unsigned int output_has_begun : 1;
-.
-.  {* Have archive map.  *}
-.  unsigned int has_armap : 1;
-.
-.  {* Set if this is a thin archive.  *}
-.  unsigned int is_thin_archive : 1;
-.
-.  {* Set if only required symbols should be added in the link hash table for
-.     this object.  Used by VMS linkers.  *}
-.  unsigned int selective_search : 1;

 .};
 .
 .};
 .

+.{* See note beside bfd_set_section_userdata.  *}
+.static inline bfd_boolean
+.bfd_set_cacheable (bfd * abfd, bfd_boolean val)
+.{
+.  abfd->cacheable = val;
+.  return TRUE;
+.}
+.

 */
 
 #include "sysdep.h"
 */
 
 #include "sysdep.h"


@@ -340,6 +350,9 @@ CODE_FRAGMENT
    where it is needed.  The typedef's used are defined in bfd.h */
 \f
 /*
    where it is needed.  The typedef's used are defined in bfd.h */
 \f
 /*

+INODE
+Error reporting, Miscellaneous, typedef bfd, BFD front end
+

 SECTION
        Error reporting
 
 SECTION
        Error reporting
 


@@ -374,6 +387,7 @@ CODE_FRAGMENT
 .  bfd_error_no_armap,
 .  bfd_error_no_more_archived_files,
 .  bfd_error_malformed_archive,
 .  bfd_error_no_armap,
 .  bfd_error_no_more_archived_files,
 .  bfd_error_malformed_archive,

+.  bfd_error_missing_dso,

 .  bfd_error_file_not_recognized,
 .  bfd_error_file_ambiguously_recognized,
 .  bfd_error_no_contents,
 .  bfd_error_file_not_recognized,
 .  bfd_error_file_ambiguously_recognized,
 .  bfd_error_no_contents,


@@ -406,6 +420,7 @@ const char *const bfd_errmsgs[] =
   N_("Archive has no index; run ranlib to add one"),
   N_("No more archived files"),
   N_("Malformed archive"),
   N_("Archive has no index; run ranlib to add one"),
   N_("No more archived files"),
   N_("Malformed archive"),

+  N_("DSO missing from command line"),

   N_("File format not recognized"),
   N_("File format is ambiguous"),
   N_("Section has no contents"),
   N_("File format not recognized"),
   N_("File format is ambiguous"),
   N_("Section has no contents"),


@@ -727,7 +742,9 @@ _bfd_default_error_handler (const char *fmt, ...)
   vfprintf (stderr, new_fmt, ap);
   va_end (ap);
 
   vfprintf (stderr, new_fmt, ap);
   va_end (ap);
 

-  putc ('\n', stderr);
+  /* On AIX, putc is implemented as a macro that triggers a -Wunused-value
+     warning, so use the fputc function to avoid it.  */
+  fputc ('\n', stderr);

   fflush (stderr);
 }
 
   fflush (stderr);
 }
 


@@ -881,6 +898,9 @@ bfd_get_assert_handler (void)
 }
 \f
 /*
 }
 \f
 /*

+INODE
+Miscellaneous, Memory Usage, Error reporting, BFD front end
+

 SECTION
        Miscellaneous
 
 SECTION
        Miscellaneous
 


@@ -1026,12 +1046,6 @@ bfd_assert (const char *file, int line)
 {
   (*_bfd_assert_handler) (_("BFD %s assertion fail %s:%d"),
                          BFD_VERSION_STRING, file, line);
 {
   (*_bfd_assert_handler) (_("BFD %s assertion fail %s:%d"),
                          BFD_VERSION_STRING, file, line);

-
-  /* We used to just return from bfd_assert, but that caused more
-     grief than relief.  The different code paths for bfd_assert and
-     _bfd_abort could be united but keeping them separate can
-     simplify debugging.  */
-  _exit (EXIT_FAILURE);

 }
 
 /* A more or less friendly abort message.  In libbfd.h abort is
 }
 
 /* A more or less friendly abort message.  In libbfd.h abort is


@@ -1060,9 +1074,11 @@ SYNOPSIS
        int bfd_get_arch_size (bfd *abfd);
 
 DESCRIPTION
        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 the normalized architecture address size, in bits, as
+       determined by the object file's format.  By normalized, we mean
+       either 32 or 64.  For ELF, this information is included in the
+       header.  Use bfd_arch_bits_per_address for number of bits in
+       the architecture address.

 
 RETURNS
        Returns the arch size in bits if known, <<-1>> otherwise.
 
 RETURNS
        Returns the arch size in bits if known, <<-1>> otherwise.


@@ -1074,7 +1090,7 @@ bfd_get_arch_size (bfd *abfd)
   if (abfd->xvec->flavour == bfd_target_elf_flavour)
     return get_elf_backend_data (abfd)->s->arch_size;
 
   if (abfd->xvec->flavour == bfd_target_elf_flavour)
     return get_elf_backend_data (abfd)->s->arch_size;
 

-  return -1;
+  return bfd_arch_bits_per_address (abfd) > 32 ? 64 : 32;

 }
 
 /*
 }
 
 /*


@@ -1428,7 +1444,12 @@ DESCRIPTION
 .
 .#define bfd_find_nearest_line(abfd, sec, syms, off, file, func, line) \
 .       BFD_SEND (abfd, _bfd_find_nearest_line, \
 .
 .#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))
+.                 (abfd, syms, sec, off, file, func, line, NULL))
+.
+.#define bfd_find_nearest_line_discriminator(abfd, sec, syms, off, file, func, \
+.                                            line, disc) \
+.       BFD_SEND (abfd, _bfd_find_nearest_line, \
+.                 (abfd, syms, sec, off, file, func, line, disc))

 .
 .#define bfd_find_line(abfd, syms, sym, file, line) \
 .       BFD_SEND (abfd, _bfd_find_line, \
 .
 .#define bfd_find_line(abfd, syms, sym, file, line) \
 .       BFD_SEND (abfd, _bfd_find_line, \


@@ -1462,8 +1483,8 @@ DESCRIPTION
 .#define bfd_gc_sections(abfd, link_info) \
 .      BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
 .
 .#define bfd_gc_sections(abfd, link_info) \
 .      BFD_SEND (abfd, _bfd_gc_sections, (abfd, link_info))
 .

-.#define bfd_lookup_section_flags(link_info, flag_info) \
-.      BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info))
+.#define bfd_lookup_section_flags(link_info, flag_info, section) \
+.      BFD_SEND (abfd, _bfd_lookup_section_flags, (link_info, flag_info, section))

 .
 .#define bfd_merge_sections(abfd, link_info) \
 .      BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))
 .
 .#define bfd_merge_sections(abfd, link_info) \
 .      BFD_SEND (abfd, _bfd_merge_sections, (abfd, link_info))


@@ -1477,9 +1498,6 @@ DESCRIPTION
 .#define bfd_link_hash_table_create(abfd) \
 .      BFD_SEND (abfd, _bfd_link_hash_table_create, (abfd))
 .
 .#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_add_symbols(abfd, info) \
 .      BFD_SEND (abfd, _bfd_link_add_symbols, (abfd, info))
 .


@@ -1581,7 +1599,7 @@ bfd_record_phdr (bfd *abfd,
   if (count > 0)
     memcpy (m->sections, secs, count * sizeof (asection *));
 
   if (count > 0)
     memcpy (m->sections, secs, count * sizeof (asection *));
 

-  for (pm = &elf_tdata (abfd)->segment_map; *pm != NULL; pm = &(*pm)->next)
+  for (pm = &elf_seg_map (abfd); *pm != NULL; pm = &(*pm)->next)

     ;
   *pm = m;
 
     ;
   *pm = m;
 


@@ -1688,128 +1706,6 @@ bfd_alt_mach_code (bfd *abfd, int alternative)
 }
 
 /*
 }
 
 /*

-CODE_FRAGMENT
-
-.struct bfd_preserve
-.{
-.  void *marker;
-.  void *tdata;
-.  flagword flags;
-.  const struct bfd_arch_info *arch_info;
-.  struct bfd_section *sections;
-.  struct bfd_section *section_last;
-.  unsigned int section_count;
-.  struct bfd_hash_table section_htab;
-.};
-.
-*/
-
-/*
-FUNCTION
-       bfd_preserve_save
-
-SYNOPSIS
-       bfd_boolean bfd_preserve_save (bfd *, struct bfd_preserve *);
-
-DESCRIPTION
-       When testing an object for compatibility with a particular
-       target back-end, the back-end object_p function needs to set
-       up certain fields in the bfd on successfully recognizing the
-       object.  This typically happens in a piecemeal fashion, with
-       failures possible at many points.  On failure, the bfd is
-       supposed to be restored to its initial state, which is
-       virtually impossible.  However, restoring a subset of the bfd
-       state works in practice.  This function stores the subset and
-       reinitializes the bfd.
-
-*/
-
-bfd_boolean
-bfd_preserve_save (bfd *abfd, struct bfd_preserve *preserve)
-{
-  preserve->tdata = abfd->tdata.any;
-  preserve->arch_info = abfd->arch_info;
-  preserve->flags = abfd->flags;
-  preserve->sections = abfd->sections;
-  preserve->section_last = abfd->section_last;
-  preserve->section_count = abfd->section_count;
-  preserve->section_htab = abfd->section_htab;
-
-  if (! bfd_hash_table_init (&abfd->section_htab, bfd_section_hash_newfunc,
-                            sizeof (struct section_hash_entry)))
-    return FALSE;
-
-  abfd->tdata.any = NULL;
-  abfd->arch_info = &bfd_default_arch_struct;
-  abfd->flags &= BFD_FLAGS_SAVED;
-  abfd->sections = NULL;
-  abfd->section_last = NULL;
-  abfd->section_count = 0;
-
-  return TRUE;
-}
-
-/*
-FUNCTION
-       bfd_preserve_restore
-
-SYNOPSIS
-       void bfd_preserve_restore (bfd *, struct bfd_preserve *);
-
-DESCRIPTION
-       This function restores bfd state saved by bfd_preserve_save.
-       If MARKER is non-NULL in struct bfd_preserve then that block
-       and all subsequently bfd_alloc'd memory is freed.
-
-*/
-
-void
-bfd_preserve_restore (bfd *abfd, struct bfd_preserve *preserve)
-{
-  bfd_hash_table_free (&abfd->section_htab);
-
-  abfd->tdata.any = preserve->tdata;
-  abfd->arch_info = preserve->arch_info;
-  abfd->flags = preserve->flags;
-  abfd->section_htab = preserve->section_htab;
-  abfd->sections = preserve->sections;
-  abfd->section_last = preserve->section_last;
-  abfd->section_count = preserve->section_count;
-
-  /* bfd_release frees all memory more recently bfd_alloc'd than
-     its arg, as well as its arg.  */
-  if (preserve->marker != NULL)
-    {
-      bfd_release (abfd, preserve->marker);
-      preserve->marker = NULL;
-    }
-}
-
-/*
-FUNCTION
-       bfd_preserve_finish
-
-SYNOPSIS
-       void bfd_preserve_finish (bfd *, struct bfd_preserve *);
-
-DESCRIPTION
-       This function should be called when the bfd state saved by
-       bfd_preserve_save is no longer needed.  ie. when the back-end
-       object_p function returns with success.
-
-*/
-
-void
-bfd_preserve_finish (bfd *abfd ATTRIBUTE_UNUSED, struct bfd_preserve *preserve)
-{
-  /* It would be nice to be able to free more memory here, eg. old
-     tdata, but that's not possible since these blocks are sitting
-     inside bfd_alloc'd memory.  The section hash is on a separate
-     objalloc.  */
-  bfd_hash_table_free (&preserve->section_htab);
-}
-
-/*

 FUNCTION
        bfd_emul_get_maxpagesize
 
 FUNCTION
        bfd_emul_get_maxpagesize