* include/stdio.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk): New prototypes.
(__vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Likewise.
Add libc_hidden_proto.
* libio/obprintf.c
(_IO_obstack_jumps): No longer static, add attribute_hidden.
* libio/bits/stdio-ldbl.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Add __LDBL_REDIR_DECL.
* libio/bits/stdio2.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): New prototypes.
(asprintf, __asprintf, dprintf, obstack_printf, vasprintf, vdprintf,
obstack_vprintf): New inlines.
* debug/dprintf_chk.c: New file.
* debug/vdprintf_chk.c: New file.
* debug/asprintf_chk.c: New file.
* debug/vasprintf_chk.c: New file.
* debug/obprintf_chk.c: New file.
* debug/tst-chk1.c (do_test): Add asprintf and obstack_printf tests.
* debug/Versions (__asprintf_chk, __dprintf_chk, __obstack_printf_chk,
__vasprintf_chk, __vdprintf_chk, __obstack_vprintf_chk): Export
@@GLIBC_2.8.
* debug/Makefile: Build asprintf_chk, vasprintf_chk, dprintf_chk,
vdprintf_chk and obprintf_chk, set CFLAGS for them.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): Add
libc_hidden_proto.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): New prototypes.
* sysdeps/ieee754/ldbl-opt/Versions (__nldbl___asprintf_chk,
__nldbl___vasprintf_chk, __nldbl___dprintf_chk, __nldbl___vdprintf_chk,
__nldbl___obstack_printf_chk, __nldbl___obstack_vprintf_chk): Export
@@GLIBC_2.8.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add asprintf_chk,
vasprintf_chk, dprintf_chk, vdprintf_chk, obstack_printf_chk and
obstack_vprintf_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_vprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-dprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_printf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-asprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vdprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vasprintf_chk.c: New file.
2008-03-05 15:05:13 +08:00
|
|
|
/* Print output of stream to given obstack.
|
2018-01-01 08:32:25 +08:00
|
|
|
Copyright (C) 1996-2018 Free Software Foundation, Inc.
|
* include/stdio.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk): New prototypes.
(__vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Likewise.
Add libc_hidden_proto.
* libio/obprintf.c
(_IO_obstack_jumps): No longer static, add attribute_hidden.
* libio/bits/stdio-ldbl.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Add __LDBL_REDIR_DECL.
* libio/bits/stdio2.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): New prototypes.
(asprintf, __asprintf, dprintf, obstack_printf, vasprintf, vdprintf,
obstack_vprintf): New inlines.
* debug/dprintf_chk.c: New file.
* debug/vdprintf_chk.c: New file.
* debug/asprintf_chk.c: New file.
* debug/vasprintf_chk.c: New file.
* debug/obprintf_chk.c: New file.
* debug/tst-chk1.c (do_test): Add asprintf and obstack_printf tests.
* debug/Versions (__asprintf_chk, __dprintf_chk, __obstack_printf_chk,
__vasprintf_chk, __vdprintf_chk, __obstack_vprintf_chk): Export
@@GLIBC_2.8.
* debug/Makefile: Build asprintf_chk, vasprintf_chk, dprintf_chk,
vdprintf_chk and obprintf_chk, set CFLAGS for them.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): Add
libc_hidden_proto.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): New prototypes.
* sysdeps/ieee754/ldbl-opt/Versions (__nldbl___asprintf_chk,
__nldbl___vasprintf_chk, __nldbl___dprintf_chk, __nldbl___vdprintf_chk,
__nldbl___obstack_printf_chk, __nldbl___obstack_vprintf_chk): Export
@@GLIBC_2.8.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add asprintf_chk,
vasprintf_chk, dprintf_chk, vdprintf_chk, obstack_printf_chk and
obstack_vprintf_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_vprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-dprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_printf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-asprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vdprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vasprintf_chk.c: New file.
2008-03-05 15:05:13 +08:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996.
|
|
|
|
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
|
|
|
|
The GNU C Library 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
|
|
|
|
Lesser General Public License for more details.
|
|
|
|
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
2012-02-10 07:18:22 +08:00
|
|
|
License along with the GNU C Library; if not, see
|
|
|
|
<http://www.gnu.org/licenses/>. */
|
* include/stdio.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk): New prototypes.
(__vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Likewise.
Add libc_hidden_proto.
* libio/obprintf.c
(_IO_obstack_jumps): No longer static, add attribute_hidden.
* libio/bits/stdio-ldbl.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Add __LDBL_REDIR_DECL.
* libio/bits/stdio2.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): New prototypes.
(asprintf, __asprintf, dprintf, obstack_printf, vasprintf, vdprintf,
obstack_vprintf): New inlines.
* debug/dprintf_chk.c: New file.
* debug/vdprintf_chk.c: New file.
* debug/asprintf_chk.c: New file.
* debug/vasprintf_chk.c: New file.
* debug/obprintf_chk.c: New file.
* debug/tst-chk1.c (do_test): Add asprintf and obstack_printf tests.
* debug/Versions (__asprintf_chk, __dprintf_chk, __obstack_printf_chk,
__vasprintf_chk, __vdprintf_chk, __obstack_vprintf_chk): Export
@@GLIBC_2.8.
* debug/Makefile: Build asprintf_chk, vasprintf_chk, dprintf_chk,
vdprintf_chk and obprintf_chk, set CFLAGS for them.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): Add
libc_hidden_proto.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): New prototypes.
* sysdeps/ieee754/ldbl-opt/Versions (__nldbl___asprintf_chk,
__nldbl___vasprintf_chk, __nldbl___dprintf_chk, __nldbl___vdprintf_chk,
__nldbl___obstack_printf_chk, __nldbl___obstack_vprintf_chk): Export
@@GLIBC_2.8.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add asprintf_chk,
vasprintf_chk, dprintf_chk, vdprintf_chk, obstack_printf_chk and
obstack_vprintf_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_vprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-dprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_printf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-asprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vdprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vasprintf_chk.c: New file.
2008-03-05 15:05:13 +08:00
|
|
|
|
|
|
|
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <libioP.h>
|
|
|
|
#include "../libio/strfile.h"
|
|
|
|
#include <assert.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <errno.h>
|
|
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|
#include <obstack.h>
|
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|
#include <stdarg.h>
|
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|
#include <stdio_ext.h>
|
|
|
|
|
|
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|
|
|
|
|
struct _IO_obstack_file
|
|
|
|
{
|
|
|
|
struct _IO_FILE_plus file;
|
|
|
|
struct obstack *obstack;
|
|
|
|
};
|
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|
|
libio: Implement vtable verification [BZ #20191]
This commit puts all libio vtables in a dedicated, read-only ELF
section, so that they are consecutive in memory. Before any indirect
jump, the vtable pointer is checked against the section boundaries,
and the process is terminated if the vtable pointer does not fall into
the special ELF section.
To enable backwards compatibility, a special flag variable
(_IO_accept_foreign_vtables), protected by the pointer guard, avoids
process termination if libio stream object constructor functions have
been called earlier. Such constructor functions are called by the GCC
2.95 libstdc++ library, and this mechanism ensures compatibility with
old binaries. Existing callers inside glibc of these functions are
adjusted to call the original functions, not the wrappers which enable
vtable compatiblity.
The compatibility mechanism is used to enable passing FILE * objects
across a static dlopen boundary, too.
2016-06-24 02:01:40 +08:00
|
|
|
extern const struct _IO_jump_t _IO_obstack_jumps libio_vtable attribute_hidden;
|
* include/stdio.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk): New prototypes.
(__vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Likewise.
Add libc_hidden_proto.
* libio/obprintf.c
(_IO_obstack_jumps): No longer static, add attribute_hidden.
* libio/bits/stdio-ldbl.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Add __LDBL_REDIR_DECL.
* libio/bits/stdio2.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): New prototypes.
(asprintf, __asprintf, dprintf, obstack_printf, vasprintf, vdprintf,
obstack_vprintf): New inlines.
* debug/dprintf_chk.c: New file.
* debug/vdprintf_chk.c: New file.
* debug/asprintf_chk.c: New file.
* debug/vasprintf_chk.c: New file.
* debug/obprintf_chk.c: New file.
* debug/tst-chk1.c (do_test): Add asprintf and obstack_printf tests.
* debug/Versions (__asprintf_chk, __dprintf_chk, __obstack_printf_chk,
__vasprintf_chk, __vdprintf_chk, __obstack_vprintf_chk): Export
@@GLIBC_2.8.
* debug/Makefile: Build asprintf_chk, vasprintf_chk, dprintf_chk,
vdprintf_chk and obprintf_chk, set CFLAGS for them.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): Add
libc_hidden_proto.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): New prototypes.
* sysdeps/ieee754/ldbl-opt/Versions (__nldbl___asprintf_chk,
__nldbl___vasprintf_chk, __nldbl___dprintf_chk, __nldbl___vdprintf_chk,
__nldbl___obstack_printf_chk, __nldbl___obstack_vprintf_chk): Export
@@GLIBC_2.8.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add asprintf_chk,
vasprintf_chk, dprintf_chk, vdprintf_chk, obstack_printf_chk and
obstack_vprintf_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_vprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-dprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_printf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-asprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vdprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vasprintf_chk.c: New file.
2008-03-05 15:05:13 +08:00
|
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|
|
|
|
int
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|
|
|
__obstack_vprintf_chk (struct obstack *obstack, int flags, const char *format,
|
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|
|
va_list args)
|
|
|
|
{
|
|
|
|
struct obstack_FILE
|
|
|
|
{
|
|
|
|
struct _IO_obstack_file ofile;
|
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|
|
} new_f;
|
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|
|
int result;
|
|
|
|
int size;
|
|
|
|
int room;
|
|
|
|
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|
|
|
#ifdef _IO_MTSAFE_IO
|
|
|
|
new_f.ofile.file.file._lock = NULL;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
_IO_no_init (&new_f.ofile.file.file, _IO_USER_LOCK, -1, NULL, NULL);
|
|
|
|
_IO_JUMPS (&new_f.ofile.file) = &_IO_obstack_jumps;
|
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|
|
room = obstack_room (obstack);
|
|
|
|
size = obstack_object_size (obstack) + room;
|
|
|
|
if (size == 0)
|
|
|
|
{
|
|
|
|
/* We have to handle the allocation a bit different since the
|
|
|
|
`_IO_str_init_static' function would handle a size of zero
|
|
|
|
different from what we expect. */
|
|
|
|
|
|
|
|
/* Get more memory. */
|
|
|
|
obstack_make_room (obstack, 64);
|
|
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|
|
|
|
|
/* Recompute how much room we have. */
|
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|
|
room = obstack_room (obstack);
|
|
|
|
size = room;
|
|
|
|
|
|
|
|
assert (size != 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
_IO_str_init_static_internal ((struct _IO_strfile_ *) &new_f.ofile,
|
|
|
|
obstack_base (obstack),
|
|
|
|
size, obstack_next_free (obstack));
|
|
|
|
/* Now allocate the rest of the current chunk. */
|
|
|
|
assert (size == (new_f.ofile.file.file._IO_write_end
|
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|
|
- new_f.ofile.file.file._IO_write_base));
|
|
|
|
assert (new_f.ofile.file.file._IO_write_ptr
|
|
|
|
== (new_f.ofile.file.file._IO_write_base
|
|
|
|
+ obstack_object_size (obstack)));
|
|
|
|
obstack_blank_fast (obstack, room);
|
|
|
|
|
|
|
|
new_f.ofile.obstack = obstack;
|
|
|
|
|
|
|
|
/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
|
|
|
|
can only come from read-only format strings. */
|
|
|
|
if (flags > 0)
|
|
|
|
new_f.ofile.file.file._flags2 |= _IO_FLAGS2_FORTIFY;
|
|
|
|
|
Add __v*printf_internal with flags arguments
There are a lot more printf variants than there are scanf variants,
and the code for setting up and tearing down their custom FILE
variants around the call to __vf(w)printf is more complicated and
variable. Therefore, I have added _internal versions of all the
v*printf variants, rather than introducing helper routines so that
they can all directly call __vf(w)printf_internal, as was done with
scanf.
As with the scanf changes, in this patch the _internal functions still
look at the environmental mode bits and all callers pass 0 for the
flags parameter.
Several of the affected public functions had _IO_ name aliases that
were not exported (but, in one case, appeared in libio.h anyway);
I was originally planning to leave them as aliases to avoid having
to touch internal callers, but it turns out ldbl_*_alias only work
for exported symbols, so they've all been removed instead. It also
turns out there were hardly any internal callers. _IO_vsprintf and
_IO_vfprintf *are* exported, so those two stick around.
Summary for the changes to each of the affected symbols:
_IO_vfprintf, _IO_vsprintf:
All internal calls removed, thus the internal declarations, as well
as uses of libc_hidden_proto and libc_hidden_def, were also removed.
The external symbol is now exposed via uses of ldbl_strong_alias
to __vfprintf_internal and __vsprintf_internal, respectively.
_IO_vasprintf, _IO_vdprintf, _IO_vsnprintf,
_IO_vfwprintf, _IO_vswprintf,
_IO_obstack_vprintf, _IO_obstack_printf:
All internal calls removed, thus declaration in internal headers
were also removed. They were never exported, so there are no
aliases tying them to the internal functions. I.e.: entirely gone.
__vsnprintf:
Internal calls were always preceded by macros such as
#define __vsnprintf _IO_vsnprintf, and
#define __vsnprintf vsnprintf
The macros were removed and their uses replaced with calls to the
new internal function __vsnprintf_internal. Since there were no
internal calls, the internal declaration was also removed. The
external symbol is preserved with ldbl_weak_alias to ___vsnprintf.
__vfwprintf:
All internal calls converted into calls to __vfwprintf_internal,
thus the internal declaration was removed. The function is now a
wrapper that calls __vfwprintf_internal. The external symbol is
preserved.
__vswprintf:
Similarly, but no external symbol.
__vasprintf, __vdprintf, __vfprintf, __vsprintf:
New internal wrappers. Not exported.
vasprintf, vdprintf, vfprintf, vsprintf, vsnprintf,
vfwprintf, vswprintf,
obstack_vprintf, obstack_printf:
These functions used to be aliases to the respective _IO_* function,
they are now aliases to their respective __* functions.
Tested for powerpc and powerpc64le.
2018-03-08 03:32:01 +08:00
|
|
|
result = __vfprintf_internal (&new_f.ofile.file.file, format, args, 0);
|
* include/stdio.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk): New prototypes.
(__vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Likewise.
Add libc_hidden_proto.
* libio/obprintf.c
(_IO_obstack_jumps): No longer static, add attribute_hidden.
* libio/bits/stdio-ldbl.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): Add __LDBL_REDIR_DECL.
* libio/bits/stdio2.h (__asprintf_chk, __dprintf_chk,
__obstack_printf_chk, __vasprintf_chk, __vdprintf_chk,
__obstack_vprintf_chk): New prototypes.
(asprintf, __asprintf, dprintf, obstack_printf, vasprintf, vdprintf,
obstack_vprintf): New inlines.
* debug/dprintf_chk.c: New file.
* debug/vdprintf_chk.c: New file.
* debug/asprintf_chk.c: New file.
* debug/vasprintf_chk.c: New file.
* debug/obprintf_chk.c: New file.
* debug/tst-chk1.c (do_test): Add asprintf and obstack_printf tests.
* debug/Versions (__asprintf_chk, __dprintf_chk, __obstack_printf_chk,
__vasprintf_chk, __vdprintf_chk, __obstack_vprintf_chk): Export
@@GLIBC_2.8.
* debug/Makefile: Build asprintf_chk, vasprintf_chk, dprintf_chk,
vdprintf_chk and obprintf_chk, set CFLAGS for them.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.c (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): Add
libc_hidden_proto.
* sysdeps/ieee754/ldbl-opt/nldbl-compat.h (__nldbl___vasprintf_chk,
__nldbl___vdprintf_chk, __nldbl___obstack_vprintf_chk): New prototypes.
* sysdeps/ieee754/ldbl-opt/Versions (__nldbl___asprintf_chk,
__nldbl___vasprintf_chk, __nldbl___dprintf_chk, __nldbl___vdprintf_chk,
__nldbl___obstack_printf_chk, __nldbl___obstack_vprintf_chk): Export
@@GLIBC_2.8.
* sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Add asprintf_chk,
vasprintf_chk, dprintf_chk, vdprintf_chk, obstack_printf_chk and
obstack_vprintf_chk.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_vprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-dprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-obstack_printf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-asprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vdprintf_chk.c: New file.
* sysdeps/ieee754/ldbl-opt/nldbl-vasprintf_chk.c: New file.
2008-03-05 15:05:13 +08:00
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/* Shrink the buffer to the space we really currently need. */
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obstack_blank_fast (obstack, (new_f.ofile.file.file._IO_write_ptr
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- new_f.ofile.file.file._IO_write_end));
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return result;
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}
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libc_hidden_def (__obstack_vprintf_chk)
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int
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__obstack_printf_chk (struct obstack *obstack, int flags, const char *format,
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...)
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{
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int result;
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va_list ap;
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va_start (ap, format);
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result = __obstack_vprintf_chk (obstack, flags, format, ap);
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va_end (ap);
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return result;
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}
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