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BFD_INIT_MAGIC

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This patch performs a run-time test that a shared libbfd.so has been
compiled with the same size bfd_vma as that of apps using the library.
On a 32-bit host it is easily possible to have one libbfd.so compiled
to support 64-bit targets (or configured with --enable-64-bit-bfd)
while another only supports 32-bit targets.  The two libraries will
have differently sized bfd_vma types, and if the wrong one is loaded
all sorts of weird behaviour might be seen.

bfd/
	PR 23534
	* init.c (BFD_INIT_MAGIC): Define.
	(bfd_init): Return BFD_INIT_MAGIC.
	bfd-in2.h: Regenerate.
binutils/
	PR 23534
	* addr2line.c (main): Exit with fatal error if bfd_init
	returns an unexpected value.
	* ar.c (main): Likewise.
	* dlltool.c (identify_dll_for_implib): Likewise.
	* nm.c (main): Likewise.
	* objcopy.c (main): Likewise.
	* objdump.c (main): Likewise.
	* size.c (main): Likewise.
	* strings.c (main): Likewise.
	* windmc.c (main): Likewise.
	* windres.c (main): Likewise.
gas/
	PR 23534
	* as.c (main): Exit with fatal error if bfd_init returns an
	unexpected value.
ld/
	PR 23534
	* ldmain.c (main): Exit with fatal error if bfd_init returns
	an unexpected value.
This commit is contained in:
Alan Modra 2018-10-15 16:10:27 +10:30
parent dc86962bf1
commit bf2dd8d7cf
18 changed files with 72 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
bfd/ChangeLog
View File

@ -1,3 +1,10 @@
2018-10-15 Alan Modra <amodra@gmail.com>
PR 23534
* init.c (BFD_INIT_MAGIC): Define.
(bfd_init): Return BFD_INIT_MAGIC.
bfd-in2.h: Regenerate.
2018-10-13 Alan Modra <amodra@gmail.com>
PR 23770

6
bfd/bfd-in2.h
View File

@ -1080,8 +1080,12 @@ extern void elf32_csky_next_input_section
extern int elf32_csky_setup_section_lists
(bfd *, struct bfd_link_info *);
/* Extracted from init.c. */
void bfd_init (void);
size_t bfd_init (void);
/* Value returned by bfd_init. */
#define BFD_INIT_MAGIC (sizeof (struct bfd_section))
/* Extracted from opncls.c. */
/* Set to N to open the next N BFDs using an alternate id space. */
extern unsigned int bfd_use_reserved_id;

11
bfd/init.c
View File

@ -38,17 +38,24 @@ FUNCTION
bfd_init
SYNOPSIS
void bfd_init (void);
size_t bfd_init (void);
DESCRIPTION
This routine must be called before any other BFD function to
initialize magical internal data structures.
Returns a magic number, which may be used to check
that the bfd library is configured as expected by users.
.
.{* Value returned by bfd_init. *}
.
.#define BFD_INIT_MAGIC (sizeof (struct bfd_section))
*/
/* Actually, there is currently nothing for this function to do.
However, someday it may be needed, so keep it around. */
void
size_t
bfd_init (void)
{
return BFD_INIT_MAGIC;
}

15
binutils/ChangeLog
View File

@ -1,3 +1,18 @@
2018-10-15 Alan Modra <amodra@gmail.com>
PR 23534
* addr2line.c (main): Exit with fatal error if bfd_init
returns an unexpected value.
* ar.c (main): Likewise.
* dlltool.c (identify_dll_for_implib): Likewise.
* nm.c (main): Likewise.
* objcopy.c (main): Likewise.
* objdump.c (main): Likewise.
* size.c (main): Likewise.
* strings.c (main): Likewise.
* windmc.c (main): Likewise.
* windres.c (main): Likewise.
2018-10-11 Jordan Rupprecht <rupprecht@google.com>
Nick Clifton <nickc@redhat.com>

3
binutils/addr2line.c
View File

@ -435,7 +435,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
file_name = NULL;

3
binutils/ar.c
View File

@ -718,7 +718,8 @@ main (int argc, char **argv)
START_PROGRESS (program_name, 0);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
xatexit (remove_output);

3
binutils/dlltool.c
View File

@ -3504,7 +3504,8 @@ identify_dll_for_implib (void)
search_data.symname = "__NULL_IMPORT_DESCRIPTOR";
search_data.found = FALSE;
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
abfd = bfd_openr (identify_imp_name, 0);
if (abfd == NULL)

3
binutils/nm.c
View File

@ -1654,7 +1654,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
while ((c = getopt_long (argc, argv, "aABCDef:gHhlnopPrSst:uvVvX:",

3
binutils/objcopy.c
View File

@ -5659,7 +5659,8 @@ main (int argc, char *argv[])
strip_symbols = STRIP_UNDEF;
discard_locals = LOCALS_UNDEF;
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
if (is_strip < 0)

3
binutils/objdump.c
View File

@ -3842,7 +3842,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
while ((c = getopt_long (argc, argv,

3
binutils/size.c
View File

@ -137,7 +137,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
while ((c = getopt_long (argc, argv, "ABHhVvdfotx", long_options,

3
binutils/strings.c
View File

@ -287,7 +287,8 @@ main (int argc, char **argv)
usage (stderr, 1);
}
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
if (optind >= argc)

3
binutils/windmc.c
View File

@ -956,7 +956,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
target = NULL;

3
binutils/windres.c
View File

@ -812,7 +812,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
fatal (_("fatal error: libbfd ABI mismatch"));
set_default_bfd_target ();
res_init ();

6
gas/ChangeLog
View File

@ -1,3 +1,9 @@
2018-10-15 Alan Modra <amodra@gmail.com>
PR 23534
* as.c (main): Exit with fatal error if bfd_init returns an
unexpected value.
2018-10-11 Jan Beulich <jbeulich@suse.com>
* testsuite/gas/i386/xmmword.s: Add MOVQ / VMOVQ cases.

3
gas/as.c
View File

@ -1239,7 +1239,8 @@ main (int argc, char ** argv)
out_file_name = OBJ_DEFAULT_OUTPUT_FILE_NAME;
hex_init ();
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
as_fatal (_("libbfd ABI mismatch"));
bfd_set_error_program_name (myname);
#ifdef USE_EMULATIONS

6
ld/ChangeLog
View File

@ -1,3 +1,9 @@
2018-10-15 Alan Modra <amodra@gmail.com>
PR 23534
* ldmain.c (main): Exit with fatal error if bfd_init returns
an unexpected value.
2018-10-13 Alan Modra <amodra@gmail.com>
* Makefile.am (eelf32btsmip_fbsd.c, eelf32btsmipn32_fbsd.c),

3
ld/ldmain.c
View File

@ -209,7 +209,8 @@ main (int argc, char **argv)
expandargv (&argc, &argv);
bfd_init ();
if (bfd_init () != BFD_INIT_MAGIC)
einfo (_("%F%P: fatal error: libbfd ABI mismatch\n"));
bfd_set_error_program_name (program_name);