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2004-10-15 Jakub Jelinek <jakub@redhat.com>

Browse Source 
* elf/dl-minimal.c (__chk_fail): New.  Add rtld_hidden_def.
	* sysdeps/unix/sysv/linux/readonly-area.c: New file.
	* sysdeps/i386/i686/memmove.S (__memmove_chk): Add checking
	routine.
	* sysdeps/i386/i686/memcpy.S (__memcpy_chk): Likewise.
	* sysdeps/i386/i686/mempcpy.S (__mempcpy_chk): Likewise.
	* sysdeps/i386/i686/memset.S (__memset_chk): Likewise.
	* sysdeps/i386/i686/memmove-chk.S: New file.
	* sysdeps/i386/i686/memcpy-chk.S: Likewise.
	* sysdeps/i386/i686/mempcpy-chk.S: Likewise.
	* sysdeps/i386/i686/memset-chk.S: Likewise.
	* sysdeps/generic/strcat-chk.c (__strcat_chk): Don't __chk_fail
	if exactly fitting into buffer.
	* sysdeps/generic/strncat-chk.c (__strncat_chk): Likewise.
	* sysdeps/generic/readonly-area.c: New file.
	* sysdeps/generic/strncpy-chk.c (__strncpy_chk): Only test
	destlen once.
	* sysdeps/x86_64/memset.S (__memset_chk): Add checking routine.
	* sysdeps/x86_64/memcpy.S (__memcpy_chk): Likewise.
	* sysdeps/x86_64/mempcpy.S (__memcpy_chk): Define to __mempcpy_chk.
	* sysdeps/x86_64/memcpy-chk.S: New file.
	* sysdeps/x86_64/mempcpy-chk.S: Likewise.
	* sysdeps/x86_64/memset-chk.S: Likewise.
	* sysdeps/x86_64/strcpy-chk.S: Likewise.
	* sysdeps/x86_64/stpcpy-chk.S: Likewise.
	* argp/argp-xinl.c (__OPTIMIZE__): Define to 1 instead of nothing.
	* argp/argp-fs-xinl.c (__OPTIMIZE__): Likewise.
	* debug/tst-chk1.c: New test.
	* debug/tst-chk2.c: Likewise.
	* debug/tst-chk3.c: Likewise.
	* debug/test-strcpy_chk.c: Likewise.
	* debug/test-stpcpy_chk.c: Likewise.
	* debug/vsprintf_chk.c (__vsprintf_chk): If flags > 0, request
	_IO_FLAGS2_CHECK_PERCENT_N.  Add libc_hidden_def.
	* debug/Makefile (routines): Add printf_chk, fprintf_chk, vprintf_chk,
	vfprintf_chk, gets_chk and readonly-area.
	(CFLAGS-*_chk.c): Set.
	(tests): Add tst-chk1, tst-chk2, tst-chk3, test-strcpy_chk and
	test-stpcpy_chk.
	* debug/vprintf_chk.c: New file.
	* debug/printf_chk.c: Likewise.
	* debug/vfprintf_chk.c: Likewise.
	* debug/fprintf_chk.c: Likewise.
	* debug/gets_chk.c: Likewise.
	* debug/chk_fail.c (__chk_fail): Add libc_hidden_def.
	* debug/snprintf_chk.c (__snprintf_chk): Fix order of arguments
	passed to __vsnprintf_chk.
	* debug/Versions (libc): Export __printf_chk, __fprintf_chk,
	__vprintf_chk, __vfprintf_chk and __gets_chk @GLIBC_2.3.4.
	* debug/vsnprintf_chk.c (__vsnprintf_chk): Don't call
	__vsnprintf, instead create a temporary file with
	_IO_strn_jumps jumptable.  If flags > 0, request
	_IO_FLAGS2_CHECK_PERCENT_N.  Add libc_hidden_def.
	* libio/Makefile (headers): Add bits/stdio2.h.
	* libio/stdio.h: Include <bits/stdio2.h> if __USE_FORTIFY_LEVEL.
	(sprintf, snprintf, vsprintf, vsnprintf): Remove defines.
	* libio/strfile.h (_IO_strnfile): New type.
	(_IO_strn_jumps): New extern.
	* libio/vsnprintf.c (_IO_strnfile): Remove.
	(_IO_strn_jumps): Remove static.
	* libio/bits/stdio2.h: New file.
	* libio/vswprintf.c (_IO_strnfile): Rename type to...
	(_IO_wstrnfile): ...this.  Adjust all uses.
	* libio/libio.h (_IO_FLAGS2_CHECK_PERCENT_N): Define.
	* stdio-common/vfprintf.c (STR_LEN): Define.
	(vfprintf): Add readonly_format variable.
	Handle _IO_FLAGS2_CHECK_PERCENT_N.
	(buffered_vfprintf): Copy _flags2.
	* include/stdio.h (__sprintf_chk, __snprintf_chk, __vsprintf_chk,
	__vsnprintf_chk, __printf_chk, __fprintf_chk, __vprintf_chk,
	__vfprintf_chk): New prototypes.
	(__vsprintf_chk, __vsnprintf_chk): Add libc_hidden_proto.
	* include/string.h (__memcpy_chk, __memmove_chk, __mempcpy_chk,
	__memset_chk, __strcpy_chk, __stpcpy_chk, __strncpy_chk, __strcat_chk,
	__strncat_chk): New prototypes.
	* include/bits/string3.h: New file.
	* include/sys/cdefs.h (__chk_fail): Add libc_hidden_proto
	and rtld_hidden_proto.
	* string/Makefile (headers): Add bits/string3.h.
	* string/bits/string3.h (bcopy, bzero): New defines.
	(memset, memcpy, memmove, strcpy, strncpy, strcat, strncat): Change
	macros so that inlines are used only if unknown destination size
	or side-effects in destination argument.
	(mempcpy, stpcpy): Likewise.  Protect with #ifdef __USE_GNU.

2004-09-16  Ulrich Drepper  <drepper@redhat.com>

	* debug/Makefile (routines): Add *_chk.
	* debug/Versions (libc): Export __chk_fail, __memcpy_chk,
	__memmove_chk, __mempcpy_chk, __memset_chk, __stpcpy_chk,
	__strcat_chk, __strcpy_chk, __strncat_chk, __strncpy_chk,
	__sprintf_chk, __vsprintf_chk, __snprintf_chk, __vsnprintf_chk
	@GLIBC_2.3.4.
	* debug/chk_fail.c: New file.
	* debug/snprintf_chk.c: Likewise.
	* debug/sprintf_chk.c: Likewise.
	* debug/vsnprintf_chk.c: Likewise.
	* debug/vsprintf_chk.c: Likewise.
	* include/features.h (_FORTIFY_SOURCE): Document, handle.
	(__USE_FORTIFY_LEVEL): Define.
	(__GNUC_PREREQ): Move to earlier location.
	* include/sys/cdefs.h (__chk_fail): New prototype.
	* libio/bits/stdio.h (sprintf, vsprintf, snprintf, vsnprintf):
	Define if __USE_FORTIFY_LEVEL.
	* misc/sys/cdefs.h (__bos, __bos0): Define.
	* string/string.h: Include <bits/string3.h> if __USE_FORTIFY_LEVEL.
	* bits/string/string3.h: New header.
	* sysdeps/generic/memcpy_chk.c: New file.
	* sysdeps/generic/memmove_chk.c: Likewise.
	* sysdeps/generic/mempcpy_chk.c: Likewise.
	* sysdeps/generic/memset_chk.c: Likewise.
	* sysdeps/generic/stpcpy_chk.c: Likewise.
	* sysdeps/generic/strcat_chk.c: Likewise.
	* sysdeps/generic/strcpy_chk.c: Likewise.
	* sysdeps/generic/strncat_chk.c: Likewise.
	* sysdeps/generic/strncpy_chk.c: Likewise.
2004-10-15  Jakub Jelinek  <jakub@redhat.com>

	* elf/dl-minimal.c (__chk_fail): New.  Add rtld_hidden_def.
	* sysdeps/unix/sysv/linux/readonly-area.c: New file.
	* sysdeps/i386/i686/memmove.S (__memmove_chk): Add checking
	routine.
	* sysdeps/i386/i686/memcpy.S (__memcpy_chk): Likewise.
	* sysdeps/i386/i686/mempcpy.S (__mempcpy_chk): Likewise.
	* sysdeps/i386/i686/memset.S (__memset_chk): Likewise.
	* sysdeps/i386/i686/memmove-chk.S: New file.
	* sysdeps/i386/i686/memcpy-chk.S: Likewise.
	* sysdeps/i386/i686/mempcpy-chk.S: Likewise.
	* sysdeps/i386/i686/memset-chk.S: Likewise.
	* sysdeps/generic/strcat-chk.c (__strcat_chk): Don't __chk_fail
	if exactly fitting into buffer.
	* sysdeps/generic/strncat-chk.c (__strncat_chk): Likewise.
	* sysdeps/generic/readonly-area.c: New file.
	* sysdeps/generic/strncpy-chk.c (__strncpy_chk): Only test
	destlen once.
	* sysdeps/x86_64/memset.S (__memset_chk): Add checking routine.
	* sysdeps/x86_64/memcpy.S (__memcpy_chk): Likewise.
	* sysdeps/x86_64/mempcpy.S (__memcpy_chk): Define to __mempcpy_chk.
	* sysdeps/x86_64/memcpy-chk.S: New file.
	* sysdeps/x86_64/mempcpy-chk.S: Likewise.
	* sysdeps/x86_64/memset-chk.S: Likewise.
	* sysdeps/x86_64/strcpy-chk.S: Likewise.
	* sysdeps/x86_64/stpcpy-chk.S: Likewise.
	* argp/argp-xinl.c (__OPTIMIZE__): Define to 1 instead of nothing.
	* argp/argp-fs-xinl.c (__OPTIMIZE__): Likewise.
	* debug/tst-chk1.c: New test.
	* debug/tst-chk2.c: Likewise.
	* debug/tst-chk3.c: Likewise.
	* debug/test-strcpy_chk.c: Likewise.
	* debug/test-stpcpy_chk.c: Likewise.
	* debug/vsprintf_chk.c (__vsprintf_chk): If flags > 0, request
	_IO_FLAGS2_CHECK_PERCENT_N.  Add libc_hidden_def.
	* debug/Makefile (routines): Add printf_chk, fprintf_chk, vprintf_chk,
	vfprintf_chk, gets_chk and readonly-area.
	(CFLAGS-*_chk.c): Set.
	(tests): Add tst-chk1, tst-chk2, tst-chk3, test-strcpy_chk and
	test-stpcpy_chk.
	* debug/vprintf_chk.c: New file.
	* debug/printf_chk.c: Likewise.
	* debug/vfprintf_chk.c: Likewise.
	* debug/fprintf_chk.c: Likewise.
	* debug/gets_chk.c: Likewise.
	* debug/chk_fail.c (__chk_fail): Add libc_hidden_def.
	* debug/snprintf_chk.c (__snprintf_chk): Fix order of arguments
	passed to __vsnprintf_chk.
	* debug/Versions (libc): Export __printf_chk, __fprintf_chk,
	__vprintf_chk, __vfprintf_chk and __gets_chk @GLIBC_2.3.4.
	* debug/vsnprintf_chk.c (__vsnprintf_chk): Don't call
	__vsnprintf, instead create a temporary file with
	_IO_strn_jumps jumptable.  If flags > 0, request
	_IO_FLAGS2_CHECK_PERCENT_N.  Add libc_hidden_def.
	* libio/Makefile (headers): Add bits/stdio2.h.
	* libio/stdio.h: Include <bits/stdio2.h> if __USE_FORTIFY_LEVEL.
	(sprintf, snprintf, vsprintf, vsnprintf): Remove defines.
	* libio/strfile.h (_IO_strnfile): New type.
	(_IO_strn_jumps): New extern.
	* libio/vsnprintf.c (_IO_strnfile): Remove.
	(_IO_strn_jumps): Remove static.
	* libio/bits/stdio2.h: New file.
	* libio/vswprintf.c (_IO_strnfile): Rename type to...
	(_IO_wstrnfile): ...this.  Adjust all uses.
	* libio/libio.h (_IO_FLAGS2_CHECK_PERCENT_N): Define.
	* stdio-common/vfprintf.c (STR_LEN): Define.
	(vfprintf): Add readonly_format variable.
	Handle _IO_FLAGS2_CHECK_PERCENT_N.
	(buffered_vfprintf): Copy _flags2.
	* include/stdio.h (__sprintf_chk, __snprintf_chk, __vsprintf_chk,
	__vsnprintf_chk, __printf_chk, __fprintf_chk, __vprintf_chk,
	__vfprintf_chk): New prototypes.
	(__vsprintf_chk, __vsnprintf_chk): Add libc_hidden_proto.
	* include/string.h (__memcpy_chk, __memmove_chk, __mempcpy_chk,
	__memset_chk, __strcpy_chk, __stpcpy_chk, __strncpy_chk, __strcat_chk,
	__strncat_chk): New prototypes.
	* include/bits/string3.h: New file.
	* include/sys/cdefs.h (__chk_fail): Add libc_hidden_proto
	and rtld_hidden_proto.
	* string/Makefile (headers): Add bits/string3.h.
	* string/bits/string3.h (bcopy, bzero): New defines.
	(memset, memcpy, memmove, strcpy, strncpy, strcat, strncat): Change
	macros so that inlines are used only if unknown destination size
	or side-effects in destination argument.
	(mempcpy, stpcpy): Likewise.  Protect with #ifdef __USE_GNU.

2004-09-16  Ulrich Drepper  <drepper@redhat.com>

	* debug/Makefile (routines): Add *_chk.
	* debug/Versions (libc): Export __chk_fail, __memcpy_chk,
	__memmove_chk, __mempcpy_chk, __memset_chk, __stpcpy_chk,
	__strcat_chk, __strcpy_chk, __strncat_chk, __strncpy_chk,
	__sprintf_chk, __vsprintf_chk, __snprintf_chk, __vsnprintf_chk
	@GLIBC_2.3.4.
	* debug/chk_fail.c: New file.
	* debug/snprintf_chk.c: Likewise.
	* debug/sprintf_chk.c: Likewise.
	* debug/vsnprintf_chk.c: Likewise.
	* debug/vsprintf_chk.c: Likewise.
	* include/features.h (_FORTIFY_SOURCE): Document, handle.
	(__USE_FORTIFY_LEVEL): Define.
	(__GNUC_PREREQ): Move to earlier location.
	* include/sys/cdefs.h (__chk_fail): New prototype.
	* libio/bits/stdio.h (sprintf, vsprintf, snprintf, vsnprintf):
	Define if __USE_FORTIFY_LEVEL.
	* misc/sys/cdefs.h (__bos, __bos0): Define.
	* string/string.h: Include <bits/string3.h> if __USE_FORTIFY_LEVEL.
	* bits/string/string3.h: New header.
	* sysdeps/generic/memcpy_chk.c: New file.
	* sysdeps/generic/memmove_chk.c: Likewise.
	* sysdeps/generic/mempcpy_chk.c: Likewise.
	* sysdeps/generic/memset_chk.c: Likewise.
	* sysdeps/generic/stpcpy_chk.c: Likewise.
	* sysdeps/generic/strcat_chk.c: Likewise.
	* sysdeps/generic/strcpy_chk.c: Likewise.
	* sysdeps/generic/strncat_chk.c: Likewise.
	* sysdeps/generic/strncpy_chk.c: Likewise.
This commit is contained in:
Ulrich Drepper 2004-10-18 04:17:19 +00:00
parent 10e0498e2d
commit b5cc329c4f
65 changed files with 3219 additions and 43 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

119
ChangeLog
View File

@ -1,3 +1,122 @@
2004-10-15 Jakub Jelinek <jakub@redhat.com>
* elf/dl-minimal.c (__chk_fail): New. Add rtld_hidden_def.
* sysdeps/unix/sysv/linux/readonly-area.c: New file.
* sysdeps/i386/i686/memmove.S (__memmove_chk): Add checking
routine.
* sysdeps/i386/i686/memcpy.S (__memcpy_chk): Likewise.
* sysdeps/i386/i686/mempcpy.S (__mempcpy_chk): Likewise.
* sysdeps/i386/i686/memset.S (__memset_chk): Likewise.
* sysdeps/i386/i686/memmove-chk.S: New file.
* sysdeps/i386/i686/memcpy-chk.S: Likewise.
* sysdeps/i386/i686/mempcpy-chk.S: Likewise.
* sysdeps/i386/i686/memset-chk.S: Likewise.
* sysdeps/generic/strcat-chk.c (__strcat_chk): Don't __chk_fail
if exactly fitting into buffer.
* sysdeps/generic/strncat-chk.c (__strncat_chk): Likewise.
* sysdeps/generic/readonly-area.c: New file.
* sysdeps/generic/strncpy-chk.c (__strncpy_chk): Only test
destlen once.
* sysdeps/x86_64/memset.S (__memset_chk): Add checking routine.
* sysdeps/x86_64/memcpy.S (__memcpy_chk): Likewise.
* sysdeps/x86_64/mempcpy.S (__memcpy_chk): Define to __mempcpy_chk.
* sysdeps/x86_64/memcpy-chk.S: New file.
* sysdeps/x86_64/mempcpy-chk.S: Likewise.
* sysdeps/x86_64/memset-chk.S: Likewise.
* sysdeps/x86_64/strcpy-chk.S: Likewise.
* sysdeps/x86_64/stpcpy-chk.S: Likewise.
* argp/argp-xinl.c (__OPTIMIZE__): Define to 1 instead of nothing.
* argp/argp-fs-xinl.c (__OPTIMIZE__): Likewise.
* debug/tst-chk1.c: New test.
* debug/tst-chk2.c: Likewise.
* debug/tst-chk3.c: Likewise.
* debug/test-strcpy_chk.c: Likewise.
* debug/test-stpcpy_chk.c: Likewise.
* debug/vsprintf_chk.c (__vsprintf_chk): If flags > 0, request
_IO_FLAGS2_CHECK_PERCENT_N. Add libc_hidden_def.
* debug/Makefile (routines): Add printf_chk, fprintf_chk, vprintf_chk,
vfprintf_chk, gets_chk and readonly-area.
(CFLAGS-*_chk.c): Set.
(tests): Add tst-chk1, tst-chk2, tst-chk3, test-strcpy_chk and
test-stpcpy_chk.
* debug/vprintf_chk.c: New file.
* debug/printf_chk.c: Likewise.
* debug/vfprintf_chk.c: Likewise.
* debug/fprintf_chk.c: Likewise.
* debug/gets_chk.c: Likewise.
* debug/chk_fail.c (__chk_fail): Add libc_hidden_def.
* debug/snprintf_chk.c (__snprintf_chk): Fix order of arguments
passed to __vsnprintf_chk.
* debug/Versions (libc): Export __printf_chk, __fprintf_chk,
__vprintf_chk, __vfprintf_chk and __gets_chk @GLIBC_2.3.4.
* debug/vsnprintf_chk.c (__vsnprintf_chk): Don't call
__vsnprintf, instead create a temporary file with
_IO_strn_jumps jumptable. If flags > 0, request
_IO_FLAGS2_CHECK_PERCENT_N. Add libc_hidden_def.
* libio/Makefile (headers): Add bits/stdio2.h.
* libio/stdio.h: Include <bits/stdio2.h> if __USE_FORTIFY_LEVEL.
(sprintf, snprintf, vsprintf, vsnprintf): Remove defines.
* libio/strfile.h (_IO_strnfile): New type.
(_IO_strn_jumps): New extern.
* libio/vsnprintf.c (_IO_strnfile): Remove.
(_IO_strn_jumps): Remove static.
* libio/bits/stdio2.h: New file.
* libio/vswprintf.c (_IO_strnfile): Rename type to...
(_IO_wstrnfile): ...this. Adjust all uses.
* libio/libio.h (_IO_FLAGS2_CHECK_PERCENT_N): Define.
* stdio-common/vfprintf.c (STR_LEN): Define.
(vfprintf): Add readonly_format variable.
Handle _IO_FLAGS2_CHECK_PERCENT_N.
(buffered_vfprintf): Copy _flags2.
* include/stdio.h (__sprintf_chk, __snprintf_chk, __vsprintf_chk,
__vsnprintf_chk, __printf_chk, __fprintf_chk, __vprintf_chk,
__vfprintf_chk): New prototypes.
(__vsprintf_chk, __vsnprintf_chk): Add libc_hidden_proto.
* include/string.h (__memcpy_chk, __memmove_chk, __mempcpy_chk,
__memset_chk, __strcpy_chk, __stpcpy_chk, __strncpy_chk, __strcat_chk,
__strncat_chk): New prototypes.
* include/bits/string3.h: New file.
* include/sys/cdefs.h (__chk_fail): Add libc_hidden_proto
and rtld_hidden_proto.
* string/Makefile (headers): Add bits/string3.h.
* string/bits/string3.h (bcopy, bzero): New defines.
(memset, memcpy, memmove, strcpy, strncpy, strcat, strncat): Change
macros so that inlines are used only if unknown destination size
or side-effects in destination argument.
(mempcpy, stpcpy): Likewise. Protect with #ifdef __USE_GNU.
2004-09-16 Ulrich Drepper <drepper@redhat.com>
* debug/Makefile (routines): Add *_chk.
* debug/Versions (libc): Export __chk_fail, __memcpy_chk,
__memmove_chk, __mempcpy_chk, __memset_chk, __stpcpy_chk,
__strcat_chk, __strcpy_chk, __strncat_chk, __strncpy_chk,
__sprintf_chk, __vsprintf_chk, __snprintf_chk, __vsnprintf_chk
@GLIBC_2.3.4.
* debug/chk_fail.c: New file.
* debug/snprintf_chk.c: Likewise.
* debug/sprintf_chk.c: Likewise.
* debug/vsnprintf_chk.c: Likewise.
* debug/vsprintf_chk.c: Likewise.
* include/features.h (_FORTIFY_SOURCE): Document, handle.
(__USE_FORTIFY_LEVEL): Define.
(__GNUC_PREREQ): Move to earlier location.
* include/sys/cdefs.h (__chk_fail): New prototype.
* libio/bits/stdio.h (sprintf, vsprintf, snprintf, vsnprintf):
Define if __USE_FORTIFY_LEVEL.
* misc/sys/cdefs.h (__bos, __bos0): Define.
* string/string.h: Include <bits/string3.h> if __USE_FORTIFY_LEVEL.
* bits/string/string3.h: New header.
* sysdeps/generic/memcpy_chk.c: New file.
* sysdeps/generic/memmove_chk.c: Likewise.
* sysdeps/generic/mempcpy_chk.c: Likewise.
* sysdeps/generic/memset_chk.c: Likewise.
* sysdeps/generic/stpcpy_chk.c: Likewise.
* sysdeps/generic/strcat_chk.c: Likewise.
* sysdeps/generic/strcpy_chk.c: Likewise.
* sysdeps/generic/strncat_chk.c: Likewise.
* sysdeps/generic/strncpy_chk.c: Likewise.
2004-10-17 Roland McGrath <roland@frob.com>
* manual/memory.texi (Page Lock Functions): Typo fix.

4
argp/argp-fs-xinl.c
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@ -1,5 +1,5 @@
/* Real definitions for extern inline functions in argp-fmtstream.h
Copyright (C) 1997, 2003 Free Software Foundation, Inc.
Copyright (C) 1997, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Miles Bader <miles@gnu.ai.mit.edu>.
@ -24,7 +24,7 @@
#define ARGP_FS_EI
#undef __OPTIMIZE__
#define __OPTIMIZE__
#define __OPTIMIZE__ 1
#include "argp-fmtstream.h"
#if 0

4
argp/argp-xinl.c
View File

@ -1,5 +1,5 @@
/* Real definitions for extern inline functions in argp.h
Copyright (C) 1997, 1998 Free Software Foundation, Inc.
Copyright (C) 1997, 1998, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Miles Bader <miles@gnu.ai.mit.edu>.
@ -31,7 +31,7 @@
#endif
#define ARGP_EI
#undef __OPTIMIZE__
#define __OPTIMIZE__
#define __OPTIMIZE__ 1
#include "argp.h"
/* Add weak aliases. */

21
debug/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
# Copyright (C) 1998, 1999, 2000, 2001, 2004 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -24,11 +24,26 @@ subdir := debug
headers := execinfo.h
distribute = sigcontextinfo.h register-dump.h frame.h
routines := backtrace backtracesyms backtracesymsfd noophooks
routines := backtrace backtracesyms backtracesymsfd noophooks \
memcpy_chk memmove_chk mempcpy_chk memset_chk stpcpy_chk \
strcat_chk strcpy_chk strncat_chk strncpy_chk \
sprintf_chk vsprintf_chk snprintf_chk vsnprintf_chk \
printf_chk fprintf_chk vprintf_chk vfprintf_chk \
gets_chk chk_fail readonly-area
CFLAGS-backtrace.c = -fno-omit-frame-pointer
CFLAGS-sprintf_chk.c = -D_IO_MTSAFE_IO
CFLAGS-snprintf_chk.c = -D_IO_MTSAFE_IO
CFLAGS-vsprintf_chk.c = -D_IO_MTSAFE_IO
CFLAGS-vsnprintf_chk.c = -D_IO_MTSAFE_IO
CFLAGS-printf_chk.c = -D_IO_MTSAFE_IO $(exceptions)
CFLAGS-fprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions)
CFLAGS-vprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions)
CFLAGS-vfprintf_chk.c = -D_IO_MTSAFE_IO $(exceptions)
CFLAGS-gets_chk.c = -D_IO_MTSAFE_IO $(exceptions)
tests = backtrace-tst
tests = backtrace-tst tst-chk1 tst-chk2 tst-chk3 \
test-strcpy_chk test-stpcpy_chk
extra-libs = libSegFault libpcprofile
extra-libs-others = $(extra-libs)

8
debug/Versions
View File

@ -10,4 +10,12 @@ libc {
# These are to support some gcc features.
__cyg_profile_func_enter; __cyg_profile_func_exit;
}
GLIBC_2.3.4 {
__chk_fail;
__memcpy_chk; __memmove_chk; __mempcpy_chk; __memset_chk; __stpcpy_chk;
__strcat_chk; __strcpy_chk; __strncat_chk; __strncpy_chk;
__sprintf_chk; __vsprintf_chk; __snprintf_chk; __vsnprintf_chk;
__printf_chk; __fprintf_chk; __vprintf_chk; __vfprintf_chk;
__gets_chk;
}
}

38
debug/chk_fail.c Normal file
View File

@ -0,0 +1,38 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdlib.h>
#include <unistd.h>
#include <abort-instr.h>
void
__attribute__ ((noreturn))
__chk_fail (void)
{
while (1)
{
/* This will leave a nice backtrace. */
abort ();
#ifdef ABORT_INSTRUCTION
ABORT_INSTRUCTION;
#endif
_exit (127);
}
}
libc_hidden_def (__chk_fail)

45
debug/fprintf_chk.c Normal file
View File

@ -0,0 +1,45 @@
/* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
/* Write formatted output to FP from the format string FORMAT. */
int
__fprintf_chk (FILE *fp, int flag, const char *format, ...)
{
va_list ap;
int done;
_IO_acquire_lock (fp);
if (flag > 0)
fp->_flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
va_start (ap, format);
done = vfprintf (fp, format, ap);
va_end (ap);
if (flag > 0)
fp->_flags2 &= ~_IO_FLAGS2_CHECK_PERCENT_N;
_IO_release_lock (fp);
return done;
}

77
debug/gets_chk.c Normal file
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@ -0,0 +1,77 @@
/* Copyright (C) 1993, 1996, 1997, 1998, 2002, 2003, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA.
As a special exception, if you link the code in this file with
files compiled with a GNU compiler to produce an executable,
that does not cause the resulting executable to be covered by
the GNU Lesser General Public License. This exception does not
however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.
This exception applies to code released by its copyright holders
in files containing the exception. */
#include "../libio/libioP.h"
#include <limits.h>
char *
__gets_chk (char *buf, size_t size)
{
_IO_size_t count;
int ch;
char *retval;
if (size == 0)
__chk_fail ();
_IO_acquire_lock (_IO_stdin);
ch = _IO_getc_unlocked (_IO_stdin);
if (ch == EOF)
{
retval = NULL;
goto unlock_return;
}
if (ch == '\n')
count = 0;
else
{
/* This is very tricky since a file descriptor may be in the
non-blocking mode. The error flag doesn't mean much in this
case. We return an error only when there is a new error. */
int old_error = _IO_stdin->_IO_file_flags & _IO_ERR_SEEN;
_IO_stdin->_IO_file_flags &= ~_IO_ERR_SEEN;
buf[0] = (char) ch;
count = INTUSE(_IO_getline) (_IO_stdin, buf + 1, size - 1, '\n', 0) + 1;
if (_IO_stdin->_IO_file_flags & _IO_ERR_SEEN)
{
retval = NULL;
goto unlock_return;
}
else
_IO_stdin->_IO_file_flags |= old_error;
}
if (count >= size)
__chk_fail ();
buf[count] = 0;
retval = buf;
unlock_return:
_IO_release_lock (_IO_stdin);
return retval;
}
link_warning (__gets_chk, "the `gets' function is dangerous and should not be used.")

45
debug/printf_chk.c Normal file
View File

@ -0,0 +1,45 @@
/* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
/* Write formatted output to stdout from the format string FORMAT. */
int
__printf_chk (int flag, const char *format, ...)
{
va_list ap;
int done;
_IO_acquire_lock (stdout);
if (flag > 0)
stdout->_flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
va_start (ap, format);
done = vfprintf (stdout, format, ap);
va_end (ap);
if (flag > 0)
stdout->_flags2 &= ~_IO_FLAGS2_CHECK_PERCENT_N;
_IO_release_lock (stdout);
return done;
}

38
debug/snprintf_chk.c Normal file
View File

@ -0,0 +1,38 @@
/* Copyright (C) 1991, 1995, 1997, 1998, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
/* Write formatted output into S, according to the format
string FORMAT, writing no more than MAXLEN characters. */
/* VARARGS5 */
int
__snprintf_chk (char *s, size_t maxlen, int flags, size_t slen,
const char *format, ...)
{
va_list arg;
int done;
va_start (arg, format);
done = __vsnprintf_chk (s, maxlen, flags, slen, format, arg);
va_end (arg);
return done;
}

35
debug/sprintf_chk.c Normal file
View File

@ -0,0 +1,35 @@
/* Copyright (C) 1991,1995,1997,1998,2002,2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
/* Write formatted output into S, according to the format string FORMAT. */
/* VARARGS4 */
int
__sprintf_chk (char *s, int flags, size_t slen, const char *format, ...)
{
va_list arg;
int done;
va_start (arg, format);
done = __vsprintf_chk (s, flags, slen, format, arg);
va_end (arg);
return done;
}

46
debug/test-stpcpy_chk.c Normal file
View File

@ -0,0 +1,46 @@
/* Test and measure stpcpy checking functions.
Copyright (C) 1999, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#define STRCPY_RESULT(dst, len) ((dst) + (len))
#define TEST_MAIN
#include "../string/test-string.h"
extern void __attribute__ ((noreturn)) __chk_fail (void);
char *simple_stpcpy_chk (char *, const char *, size_t);
extern char *normal_stpcpy (char *, const char *, size_t)
__asm ("stpcpy");
extern char *__stpcpy_chk (char *, const char *, size_t);
IMPL (simple_stpcpy_chk, 0)
IMPL (normal_stpcpy, 1)
IMPL (__stpcpy_chk, 2)
char *
simple_stpcpy_chk (char *dst, const char *src, size_t len)
{
if (! len)
__chk_fail ();
while ((*dst++ = *src++) != '\0')
if (--len == 0)
__chk_fail ();
return dst - 1;
}
#include "test-strcpy_chk.c"

370
debug/test-strcpy_chk.c Normal file
View File

@ -0,0 +1,370 @@
/* Test and measure __strcpy_chk functions.
Copyright (C) 1999, 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Written by Jakub Jelinek <jakub@redhat.com>, 1999.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef STRCPY_RESULT
# define STRCPY_RESULT(dst, len) dst
# define TEST_MAIN
# include "../string/test-string.h"
extern void __attribute__ ((noreturn)) __chk_fail (void);
char *simple_strcpy_chk (char *, const char *, size_t);
extern char *normal_strcpy (char *, const char *, size_t)
__asm ("strcpy");
extern char *__strcpy_chk (char *, const char *, size_t);
IMPL (simple_strcpy_chk, 0)
IMPL (normal_strcpy, 1)
IMPL (__strcpy_chk, 2)
char *
simple_strcpy_chk (char *dst, const char *src, size_t len)
{
char *ret = dst;
if (! len)
__chk_fail ();
while ((*dst++ = *src++) != '\0')
if (--len == 0)
__chk_fail ();
return ret;
}
#endif
#include <setjmp.h>
#include <signal.h>
volatile int chk_fail_ok;
jmp_buf chk_fail_buf;
static void
handler (int sig)
{
if (chk_fail_ok)
{
chk_fail_ok = 0;
longjmp (chk_fail_buf, 1);
}
else
_exit (127);
}
typedef char *(*proto_t) (char *, const char *, size_t);
static void
do_one_test (impl_t *impl, char *dst, const char *src,
size_t len, size_t dlen)
{
char *res;
if (dlen <= len)
{
if (impl->test == 1)
return;
chk_fail_ok = 1;
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, dst, src, dlen);
error (0, 0, "Function %s (%zd; %zd) did not __chk_fail",
impl->name, len, dlen);
chk_fail_ok = 0;
ret = 1;
}
return;
}
else
res = CALL (impl, dst, src, dlen);
if (res != STRCPY_RESULT (dst, len))
{
error (0, 0, "Wrong result in function %s %p %p", impl->name,
res, STRCPY_RESULT (dst, len));
ret = 1;
return;
}
if (strcmp (dst, src) != 0)
{
error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
impl->name, dst, src);
ret = 1;
return;
}
if (HP_TIMING_AVAIL)
{
hp_timing_t start __attribute ((unused));
hp_timing_t stop __attribute ((unused));;
hp_timing_t best_time = ~ (hp_timing_t) 0;
size_t i;
for (i = 0; i < 32; ++i)
{
HP_TIMING_NOW (start);
CALL (impl, dst, src, dlen);
HP_TIMING_NOW (stop);
HP_TIMING_BEST (best_time, start, stop);
}
printf ("\t%zd", (size_t) best_time);
}
}
static void
do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
{
size_t i;
char *s1, *s2;
align1 &= 7;
if (align1 + len >= page_size)
return;
align2 &= 7;
if (align2 + len >= page_size)
return;
s1 = buf1 + align1;
s2 = buf2 + align2;
for (i = 0; i < len; i++)
s1[i] = 32 + 23 * i % (max_char - 32);
s1[len] = 0;
if (HP_TIMING_AVAIL && dlen > len)
printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s2, s1, len, dlen);
if (HP_TIMING_AVAIL && dlen > len)
putchar ('\n');
}
static void
do_random_tests (void)
{
size_t i, j, n, align1, align2, len, dlen;
unsigned char *p1 = buf1 + page_size - 512;
unsigned char *p2 = buf2 + page_size - 512;
unsigned char *res;
for (n = 0; n < ITERATIONS; n++)
{
align1 = random () & 31;
if (random () & 1)
align2 = random () & 31;
else
align2 = align1 + (random () & 24);
len = random () & 511;
j = align1;
if (align2 > j)
j = align2;
if (len + j >= 511)
len = 510 - j - (random () & 7);
j = len + align1 + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; i++)
{
if (i == len + align1)
p1[i] = 0;
else
{
p1[i] = random () & 255;
if (i >= align1 && i < len + align1 && !p1[i])
p1[i] = (random () & 127) + 3;
}
}
switch (random () & 7)
{
case 0:
dlen = len - (random () & 31);
if (dlen > len)
dlen = len;
break;
case 1:
dlen = (size_t) -1;
break;
case 2:
dlen = len + 1 + (random () & 65535);
break;
case 3:
dlen = len + 1 + (random () & 255);
break;
case 4:
dlen = len + 1 + (random () & 31);
break;
case 5:
dlen = len + 1 + (random () & 7);
break;
case 6:
dlen = len + 1 + (random () & 3);
break;
default:
dlen = len + 1;
break;
}
FOR_EACH_IMPL (impl, 1)
{
if (dlen <= len)
{
if (impl->test != 1)
{
chk_fail_ok = 1;
if (setjmp (chk_fail_buf) == 0)
{
res = CALL (impl, p2 + align2, p1 + align1, dlen);
error (0, 0, "Iteration %zd - did not __chk_fail", n);
chk_fail_ok = 0;
ret = 1;
}
}
continue;
}
memset (p2 - 64, '\1', 512 + 64);
res = CALL (impl, p2 + align2, p1 + align1, dlen);
if (res != STRCPY_RESULT (p2 + align2, len))
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p",
n, impl->name, align1, align2, len, res,
STRCPY_RESULT (p2 + align2, len));
ret = 1;
}
for (j = 0; j < align2 + 64; ++j)
{
if (p2[j - 64] != '\1')
{
error (0, 0, "Iteration %zd - garbage before, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
ret = 1;
break;
}
}
for (j = align2 + len + 1; j < 512; ++j)
{
if (p2[j] != '\1')
{
error (0, 0, "Iteration %zd - garbage after, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
ret = 1;
break;
}
}
if (memcmp (p1 + align1, p2 + align2, len + 1))
{
error (0, 0, "Iteration %zd - different strings, %s (%zd, %zd, %zd)",
n, impl->name, align1, align2, len);
ret = 1;
}
}
}
}
int
test_main (void)
{
size_t i;
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
sigaction (SIGABRT, &sa, NULL);
test_init ();
printf ("%23s", "");
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 0; i < 16; ++i)
{
do_test (0, 0, i, i + 1, 127);
do_test (0, 0, i, i + 1, 255);
do_test (0, i, i, i + 1, 127);
do_test (i, 0, i, i + 1, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 8 << i, (8 << i) + 1, 127);
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
do_test (i, i, (8 << i), (8 << i) + 1, 127);
do_test (i, i, (8 << i), (8 << i) + 1, 255);
}
for (i = 0; i < 16; ++i)
{
do_test (0, 0, i, i + 256, 127);
do_test (0, 0, i, i + 256, 255);
do_test (0, i, i, i + 256, 127);
do_test (i, 0, i, i + 256, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 8 << i, (8 << i) + 256, 127);
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
do_test (i, i, (8 << i), (8 << i) + 256, 127);
do_test (i, i, (8 << i), (8 << i) + 256, 255);
}
for (i = 0; i < 16; ++i)
{
do_test (0, 0, i, i, 127);
do_test (0, 0, i, i + 2, 255);
do_test (0, i, i, i + 3, 127);
do_test (i, 0, i, i + 4, 255);
}
for (i = 1; i < 8; ++i)
{
do_test (0, 0, 8 << i, (8 << i) - 15, 127);
do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
}
do_random_tests ();
return ret;
}
#include "../test-skeleton.c"

466
debug/tst-chk1.c Normal file
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@ -0,0 +1,466 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <setjmp.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
char *temp_filename;
static void do_prepare (void);
static int do_test (void);
#define PREPARE(argc, argv) do_prepare ()
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
static void
do_prepare (void)
{
int temp_fd = create_temp_file ("tst-chk1.", &temp_filename);
if (temp_fd == -1)
{
printf ("cannot create temporary file: %m\n");
exit (1);
}
const char *strs = "abcdefgh\nABCDEFGHI\nabcdefghij\nABCDEFGHIJ";
if (write (temp_fd, strs, strlen (strs)) != strlen (strs))
{
puts ("could not write test strings into file");
unlink (temp_filename);
exit (1);
}
}
volatile int chk_fail_ok;
jmp_buf chk_fail_buf;
static void
handler (int sig)
{
if (chk_fail_ok)
{
chk_fail_ok = 0;
longjmp (chk_fail_buf, 1);
}
else
_exit (127);
}
char buf[10];
volatile size_t l0;
volatile char *p;
const char *str1 = "JIHGFEDCBA";
const char *str2 = "F";
const char *str3 = "%s%n%s%n";
const char *str4 = "Hello, ";
const char *str5 = "World!\n";
char buf2[10] = "%s";
int num1 = 67;
int num2 = 987654;
#define FAIL() \
do { printf ("Failure on line %d\n", __LINE__); ret = 1; } while (0)
#define CHK_FAIL_START \
chk_fail_ok = 1; \
if (! setjmp (chk_fail_buf)) \
{
#define CHK_FAIL_END \
chk_fail_ok = 0; \
FAIL (); \
ret = 1; \
}
#if __USE_FORTIFY_LEVEL >= 2
#define CHK_FAIL2_START CHK_FAIL_START
#define CHK_FAIL2_END CHK_FAIL_END
#else
#define CHK_FAIL2_START
#define CHK_FAIL2_END
#endif
static int
do_test (void)
{
int ret = 0;
struct sigaction sa;
sa.sa_handler = handler;
sa.sa_flags = 0;
sigemptyset (&sa.sa_mask);
sigaction (SIGABRT, &sa, NULL);
struct A { char buf1[9]; char buf2[1]; } a;
printf ("Test checking routines at fortify level %d\n",
#ifdef __USE_FORTIFY_LEVEL
(int) __USE_FORTIFY_LEVEL
#else
0
#endif
);
/* These ops can be done without runtime checking of object size. */
memcpy (buf, "abcdefghij", 10);
memmove (buf + 1, buf, 9);
if (memcmp (buf, "aabcdefghi", 10))
FAIL ();
if (mempcpy (buf + 5, "abcde", 5) != buf + 10 || memcmp (buf, "aabcdabcde", 10))
FAIL ();
memset (buf + 8, 'j', 2);
if (memcmp (buf, "aabcdabcjj", 10))
FAIL ();
strcpy (buf + 4, "EDCBA");
if (memcmp (buf, "aabcEDCBA", 10))
FAIL ();
if (stpcpy (buf + 8, "F") != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
FAIL ();
strncpy (buf + 6, "X", 4);
if (memcmp (buf, "aabcEDX\0\0", 10))
FAIL ();
if (sprintf (buf + 7, "%s", "67") != 2 || memcmp (buf, "aabcEDX67", 10))
FAIL ();
if (snprintf (buf + 7, 3, "%s", "987654") != 6
|| memcmp (buf, "aabcEDX98", 10))
FAIL ();
/* These ops need runtime checking, but shouldn't __chk_fail. */
memcpy (buf, "abcdefghij", l0 + 10);
memmove (buf + 1, buf, l0 + 9);
if (memcmp (buf, "aabcdefghi", 10))
FAIL ();
if (mempcpy (buf + 5, "abcde", l0 + 5) != buf + 10 || memcmp (buf, "aabcdabcde", 10))
FAIL ();
memset (buf + 8, 'j', l0 + 2);
if (memcmp (buf, "aabcdabcjj", 10))
FAIL ();
strcpy (buf + 4, str1 + 5);
if (memcmp (buf, "aabcEDCBA", 10))
FAIL ();
if (stpcpy (buf + 8, str2) != buf + 9 || memcmp (buf, "aabcEDCBF", 10))
FAIL ();
strncpy (buf + 6, "X", l0 + 4);
if (memcmp (buf, "aabcEDX\0\0", 10))
FAIL ();
if (sprintf (buf + 7, "%d", num1) != 2 || memcmp (buf, "aabcEDX67", 10))
FAIL ();
if (snprintf (buf + 7, 3, "%d", num2) != 6 || memcmp (buf, "aabcEDX98", 10))
FAIL ();
buf[l0 + 8] = '\0';
strcat (buf, "A");
if (memcmp (buf, "aabcEDX9A", 10))
FAIL ();
buf[l0 + 7] = '\0';
strncat (buf, "ZYXWV", l0 + 2);
if (memcmp (buf, "aabcEDXZY", 10))
FAIL ();
memcpy (a.buf1, "abcdefghij", l0 + 10);
memmove (a.buf1 + 1, a.buf1, l0 + 9);
if (memcmp (a.buf1, "aabcdefghi", 10))
FAIL ();
if (mempcpy (a.buf1 + 5, "abcde", l0 + 5) != a.buf1 + 10
|| memcmp (a.buf1, "aabcdabcde", 10))
FAIL ();
memset (a.buf1 + 8, 'j', l0 + 2);
if (memcmp (a.buf1, "aabcdabcjj", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL < 2
/* The following tests are supposed to crash with -D_FORTIFY_SOURCE=2
and sufficient GCC support, as the string operations overflow
from a.buf1 into a.buf2. */
strcpy (a.buf1 + 4, str1 + 5);
if (memcmp (a.buf1, "aabcEDCBA", 10))
FAIL ();
if (stpcpy (a.buf1 + 8, str2) != a.buf1 + 9 || memcmp (a.buf1, "aabcEDCBF", 10))
FAIL ();
strncpy (a.buf1 + 6, "X", l0 + 4);
if (memcmp (a.buf1, "aabcEDX\0\0", 10))
FAIL ();
if (sprintf (a.buf1 + 7, "%d", num1) != 2 || memcmp (a.buf1, "aabcEDX67", 10))
FAIL ();
if (snprintf (a.buf1 + 7, 3, "%d", num2) != 6
|| memcmp (a.buf1, "aabcEDX98", 10))
FAIL ();
a.buf1[l0 + 8] = '\0';
strcat (a.buf1, "A");
if (memcmp (a.buf1, "aabcEDX9A", 10))
FAIL ();
a.buf1[l0 + 7] = '\0';
strncat (a.buf1, "ZYXWV", l0 + 2);
if (memcmp (a.buf1, "aabcEDXZY", 10))
FAIL ();
#endif
#if __USE_FORTIFY_LEVEL >= 1
/* Now check if all buffer overflows are caught at runtime. */
CHK_FAIL_START
memcpy (buf + 1, "abcdefghij", l0 + 10);
CHK_FAIL_END
CHK_FAIL_START
memmove (buf + 2, buf + 1, l0 + 9);
CHK_FAIL_END
CHK_FAIL_START
p = mempcpy (buf + 6, "abcde", l0 + 5);
CHK_FAIL_END
CHK_FAIL_START
memset (buf + 9, 'j', l0 + 2);
CHK_FAIL_END
CHK_FAIL_START
strcpy (buf + 5, str1 + 5);
CHK_FAIL_END
CHK_FAIL_START
p = stpcpy (buf + 9, str2);
CHK_FAIL_END
CHK_FAIL_START
strncpy (buf + 7, "X", l0 + 4);
CHK_FAIL_END
CHK_FAIL_START
sprintf (buf + 8, "%d", num1);
CHK_FAIL_END
CHK_FAIL_START
snprintf (buf + 8, l0 + 3, "%d", num2);
CHK_FAIL_END
memcpy (buf, str1 + 2, l0 + 9);
CHK_FAIL_START
strcat (buf, "AB");
CHK_FAIL_END
memcpy (buf, str1 + 3, l0 + 8);
CHK_FAIL_START
strncat (buf, "ZYXWV", l0 + 3);
CHK_FAIL_END
CHK_FAIL_START
memcpy (a.buf1 + 1, "abcdefghij", l0 + 10);
CHK_FAIL_END
CHK_FAIL_START
memmove (a.buf1 + 2, a.buf1 + 1, l0 + 9);
CHK_FAIL_END
CHK_FAIL_START
p = mempcpy (a.buf1 + 6, "abcde", l0 + 5);
CHK_FAIL_END
CHK_FAIL_START
memset (a.buf1 + 9, 'j', l0 + 2);
CHK_FAIL_END
#if __USE_FORTIFY_LEVEL >= 2
# define O 0
#else
# define O 1
#endif
CHK_FAIL_START
strcpy (a.buf1 + (O + 4), str1 + 5);
CHK_FAIL_END
CHK_FAIL_START
p = stpcpy (a.buf1 + (O + 8), str2);
CHK_FAIL_END
CHK_FAIL_START
strncpy (a.buf1 + (O + 6), "X", l0 + 4);
CHK_FAIL_END
CHK_FAIL_START
sprintf (a.buf1 + (O + 7), "%d", num1);
CHK_FAIL_END
CHK_FAIL_START
snprintf (a.buf1 + (O + 7), l0 + 3, "%d", num2);
CHK_FAIL_END
memcpy (a.buf1, str1 + (3 - O), l0 + 8 + O);
CHK_FAIL_START
strcat (a.buf1, "AB");
CHK_FAIL_END
memcpy (a.buf1, str1 + (4 - O), l0 + 7 + O);
CHK_FAIL_START
strncat (a.buf1, "ZYXWV", l0 + 3);
CHK_FAIL_END
#endif
/* Now checks for %n protection. */
/* Constant literals passed directly are always ok
(even with warnings about possible bugs from GCC). */
int n1, n2;
if (sprintf (buf, "%s%n%s%n", str2, &n1, str2, &n2) != 2
|| n1 != 1 || n2 != 2)
FAIL ();
/* In this case the format string is not known at compile time,
but resides in read-only memory, so is ok. */
if (snprintf (buf, 4, str3, str2, &n1, str2, &n2) != 2
|| n1 != 1 || n2 != 2)
FAIL ();
strcpy (buf2 + 2, "%n%s%n");
/* When the format string is writable and contains %n,
with -D_FORTIFY_SOURCE=2 it causes __chk_fail. */
CHK_FAIL2_START
if (sprintf (buf, buf2, str2, &n1, str2, &n1) != 2)
FAIL ();
CHK_FAIL2_END
CHK_FAIL2_START
if (snprintf (buf, 3, buf2, str2, &n1, str2, &n1) != 2)
FAIL ();
CHK_FAIL2_END
/* But if there is no %n, even writable format string
should work. */
buf2[6] = '\0';
if (sprintf (buf, buf2 + 4, str2) != 1)
FAIL ();
/* Constant literals passed directly are always ok
(even with warnings about possible bugs from GCC). */
if (printf ("%s%n%s%n", str4, &n1, str5, &n2) != 14
|| n1 != 7 || n2 != 14)
FAIL ();
/* In this case the format string is not known at compile time,
but resides in read-only memory, so is ok. */
if (printf (str3, str4, &n1, str5, &n2) != 14
|| n1 != 7 || n2 != 14)
FAIL ();
strcpy (buf2 + 2, "%n%s%n");
/* When the format string is writable and contains %n,
with -D_FORTIFY_SOURCE=2 it causes __chk_fail. */
CHK_FAIL2_START
if (printf (buf2, str4, &n1, str5, &n1) != 14)
FAIL ();
CHK_FAIL2_END
/* But if there is no %n, even writable format string
should work. */
buf2[6] = '\0';
if (printf (buf2 + 4, str5) != 7)
FAIL ();
FILE *fp = stdout;
/* Constant literals passed directly are always ok
(even with warnings about possible bugs from GCC). */
if (fprintf (fp, "%s%n%s%n", str4, &n1, str5, &n2) != 14
|| n1 != 7 || n2 != 14)
FAIL ();
/* In this case the format string is not known at compile time,
but resides in read-only memory, so is ok. */
if (fprintf (fp, str3, str4, &n1, str5, &n2) != 14
|| n1 != 7 || n2 != 14)
FAIL ();
strcpy (buf2 + 2, "%n%s%n");
/* When the format string is writable and contains %n,
with -D_FORTIFY_SOURCE=2 it causes __chk_fail. */
CHK_FAIL2_START
if (fprintf (fp, buf2, str4, &n1, str5, &n1) != 14)
FAIL ();
CHK_FAIL2_END
/* But if there is no %n, even writable format string
should work. */
buf2[6] = '\0';
if (fprintf (fp, buf2 + 4, str5) != 7)
FAIL ();
if (freopen (temp_filename, "r", stdin) == NULL)
{
puts ("could not open temporary file");
exit (1);
}
if (gets (buf) != buf || memcmp (buf, "abcdefgh", 9))
FAIL ();
if (gets (buf) != buf || memcmp (buf, "ABCDEFGHI", 10))
FAIL ();
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
if (gets (buf) != buf)
FAIL ();
CHK_FAIL_END
#endif
if (freopen (temp_filename, "r", stdin) == NULL)
{
puts ("could not open temporary file");
exit (1);
}
if (fseek (stdin, 9 + 10 + 11, SEEK_SET))
{
puts ("could not seek in test file");
exit (1);
}
#if __USE_FORTIFY_LEVEL >= 1
CHK_FAIL_START
if (gets (buf) != buf)
FAIL ();
CHK_FAIL_END
#endif
return ret;
}

2
debug/tst-chk2.c Normal file
View File

@ -0,0 +1,2 @@
#define _FORTIFY_SOURCE 1
#include "tst-chk1.c"

2
debug/tst-chk3.c Normal file
View File

@ -0,0 +1,2 @@
#define _FORTIFY_SOURCE 2
#include "tst-chk1.c"

42
debug/vfprintf_chk.c Normal file
View File

@ -0,0 +1,42 @@
/* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
/* Write formatted output to FP from the format string FORMAT. */
int
__vfprintf_chk (FILE *fp, int flag, const char *format, va_list ap)
{
int done;
_IO_acquire_lock (fp);
if (flag > 0)
fp->_flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
done = vfprintf (fp, format, ap);
if (flag > 0)
fp->_flags2 &= ~_IO_FLAGS2_CHECK_PERCENT_N;
_IO_release_lock (fp);
return done;
}

42
debug/vprintf_chk.c Normal file
View File

@ -0,0 +1,42 @@
/* Copyright (C) 1991, 1995, 1996, 1997, 2001, 2004
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
/* Write formatted output to stdout from the format string FORMAT. */
int
__vprintf_chk (int flag, const char *format, va_list ap)
{
int done;
_IO_acquire_lock (stdout);
if (flag > 0)
stdout->_flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
done = vfprintf (stdout, format, ap);
if (flag > 0)
stdout->_flags2 &= ~_IO_FLAGS2_CHECK_PERCENT_N;
_IO_release_lock (stdout);
return done;
}

70
debug/vsnprintf_chk.c Normal file
View File

@ -0,0 +1,70 @@
/* Copyright (C) 1991, 1995, 1997, 1998, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
#include "../libio/strfile.h"
extern const struct _IO_jump_t _IO_strn_jumps attribute_hidden;
/* Write formatted output into S, according to the format
string FORMAT, writing no more than MAXLEN characters. */
/* VARARGS5 */
int
__vsnprintf_chk (char *s, size_t maxlen, int flags, size_t slen,
const char *format, va_list args)
{
/* XXX Maybe for less strict version do not fail immediately.
Though, maxlen is supposed to be the size of buffer pointed
to by s, so a conforming program can't pass such maxlen
to *snprintf. */
if (__builtin_expect (slen < maxlen, 0))
__chk_fail ();
_IO_strnfile sf;
int ret;
#ifdef _IO_MTSAFE_IO
sf.f._sbf._f._lock = NULL;
#endif
/* We need to handle the special case where MAXLEN is 0. Use the
overflow buffer right from the start. */
if (maxlen == 0)
{
s = sf.overflow_buf;
maxlen = sizeof (sf.overflow_buf);
}
_IO_no_init (&sf.f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
_IO_JUMPS ((struct _IO_FILE_plus *) &sf.f._sbf) = &_IO_strn_jumps;
s[0] = '\0';
/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
can only come from read-only format strings. */
if (flags > 0)
sf.f._sbf._f._flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
_IO_str_init_static_internal (&sf.f, s, maxlen - 1, s);
ret = INTUSE(_IO_vfprintf) ((_IO_FILE *) &sf.f._sbf, format, args);
if (sf.f._sbf._f._IO_buf_base != sf.overflow_buf)
*sf.f._sbf._f._IO_write_ptr = '\0';
return ret;
}
libc_hidden_def (__vsnprintf_chk)

91
debug/vsprintf_chk.c Normal file
View File

@ -0,0 +1,91 @@
/* Copyright (C) 1994, 1997, 1999-2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdarg.h>
#include <stdio.h>
#include "../libio/libioP.h"
#include "../libio/strfile.h"
static int _IO_str_chk_overflow (_IO_FILE *fp, int c) __THROW;
static int
_IO_str_chk_overflow (fp, c)
_IO_FILE *fp;
int c;
{
/* When we come to here this means the user supplied buffer is
filled. */
__chk_fail ();
}
static const struct _IO_jump_t _IO_str_chk_jumps =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, _IO_str_finish),
JUMP_INIT(overflow, _IO_str_chk_overflow),
JUMP_INIT(underflow, INTUSE(_IO_str_underflow)),
JUMP_INIT(uflow, INTUSE(_IO_default_uflow)),
JUMP_INIT(pbackfail, INTUSE(_IO_str_pbackfail)),
JUMP_INIT(xsputn, INTUSE(_IO_default_xsputn)),
JUMP_INIT(xsgetn, INTUSE(_IO_default_xsgetn)),
JUMP_INIT(seekoff, INTUSE(_IO_str_seekoff)),
JUMP_INIT(seekpos, _IO_default_seekpos),
JUMP_INIT(setbuf, _IO_default_setbuf),
JUMP_INIT(sync, _IO_default_sync),
JUMP_INIT(doallocate, INTUSE(_IO_default_doallocate)),
JUMP_INIT(read, _IO_default_read),
JUMP_INIT(write, _IO_default_write),
JUMP_INIT(seek, _IO_default_seek),
JUMP_INIT(close, _IO_default_close),
JUMP_INIT(stat, _IO_default_stat),
JUMP_INIT(showmanyc, _IO_default_showmanyc),
JUMP_INIT(imbue, _IO_default_imbue)
};
int
__vsprintf_chk (char *s, int flags, size_t slen, const char *format,
va_list args)
{
_IO_strfile f;
int ret;
#ifdef _IO_MTSAFE_IO
f._sbf._f._lock = NULL;
#endif
if (slen == 0)
__chk_fail ();
_IO_no_init (&f._sbf._f, _IO_USER_LOCK, -1, NULL, NULL);
_IO_JUMPS ((struct _IO_FILE_plus *) &f._sbf) = &_IO_str_chk_jumps;
s[0] = '\0';
_IO_str_init_static_internal (&f, s, slen - 1, s);
/* For flags > 0 (i.e. __USE_FORTIFY_LEVEL > 1) request that %n
can only come from read-only format strings. */
if (flags > 0)
f._sbf._f._flags2 |= _IO_FLAGS2_CHECK_PERCENT_N;
ret = INTUSE(_IO_vfprintf) ((_IO_FILE *) &f._sbf, format, args);
*f._sbf._f._IO_write_ptr = '\0';
return ret;
}
libc_hidden_def (__vsprintf_chk)

7
elf/dl-minimal.c
View File

@ -354,6 +354,13 @@ __strsep (char **stringp, const char *delim)
weak_alias (__strsep, strsep)
strong_alias (__strsep, __strsep_g)
void
__attribute__ ((noreturn))
__chk_fail (void)
{
_exit (127);
}
rtld_hidden_def (__chk_fail)
/* The '_itoa_lower_digits' variable in libc.so is able to handle bases
up to 36. We don't need this here. */

1
include/bits/string3.h Normal file
View File

@ -0,0 +1 @@
#include <string/bits/string3.h>

40
include/features.h
View File

@ -41,6 +41,8 @@
_GNU_SOURCE All of the above, plus GNU extensions.
_REENTRANT Select additionally reentrant object.
_THREAD_SAFE Same as _REENTRANT, often used by other systems.
_FORTIFY_SOURCE If set to numeric value > 0 additional security
measures are defined, according to level.
The `-ansi' switch to the GNU C compiler defines __STRICT_ANSI__.
If none of these are defined, the default is to have _SVID_SOURCE,
@ -69,6 +71,7 @@
__USE_MISC Define things common to BSD and System V Unix.
__USE_GNU Define GNU extensions.
__USE_REENTRANT Define reentrant/thread-safe *_r functions.
__USE_FORTIFY_LEVEL Additional security measures used, according to level.
__FAVOR_BSD Favor 4.3BSD things in cases of conflict.
The macros `__GNU_LIBRARY__', `__GLIBC__', and `__GLIBC_MINOR__' are
@ -101,6 +104,7 @@
#undef __USE_MISC
#undef __USE_GNU
#undef __USE_REENTRANT
#undef __USE_FORTIFY_LEVEL
#undef __FAVOR_BSD
#undef __KERNEL_STRICT_NAMES
@ -113,6 +117,20 @@
/* Always use ISO C things. */
#define __USE_ANSI 1
/* Convenience macros to test the versions of glibc and gcc.
Use them like this:
#if __GNUC_PREREQ (2,8)
... code requiring gcc 2.8 or later ...
#endif
Note - they won't work for gcc1 or glibc1, since the _MINOR macros
were not defined then. */
#if defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __GNUC_PREREQ(maj, min) 0
#endif
/* If _BSD_SOURCE was defined by the user, favor BSD over POSIX. */
#if defined _BSD_SOURCE && \
@ -244,6 +262,14 @@
# define __USE_REENTRANT 1
#endif
#if _FORTIFY_SOURCE > 0 && __GNUC_PREREQ (4, 1) && __OPTIMIZE__ > 0
# if _FORTIFY_SOURCE == 1
# define __USE_FORTIFY_LEVEL 1
# elif _FORTIFY_SOURCE > 1
# define __USE_FORTIFY_LEVEL 2
# endif
#endif
/* We do support the IEC 559 math functionality, real and complex. */
#define __STDC_IEC_559__ 1
#define __STDC_IEC_559_COMPLEX__ 1
@ -265,20 +291,6 @@
#define __GLIBC__ 2
#define __GLIBC_MINOR__ 3
/* Convenience macros to test the versions of glibc and gcc.
Use them like this:
#if __GNUC_PREREQ (2,8)
... code requiring gcc 2.8 or later ...
#endif
Note - they won't work for gcc1 or glibc1, since the _MINOR macros
were not defined then. */
#if defined __GNUC__ && defined __GNUC_MINOR__
# define __GNUC_PREREQ(maj, min) \
((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
#else
# define __GNUC_PREREQ(maj, min) 0
#endif
#define __GLIBC_PREREQ(maj, min) \
((__GLIBC__ << 16) + __GLIBC_MINOR__ >= ((maj) << 16) + (min))

14
include/stdio.h
View File

@ -27,6 +27,18 @@ extern int __vsscanf (__const char *__restrict __s,
_G_va_list __arg)
__attribute__ ((__format__ (__scanf__, 2, 0)));
extern int __sprintf_chk (char *, int, size_t, const char *, ...) __THROW;
extern int __snprintf_chk (char *, size_t, int, size_t, const char *, ...)
__THROW;
extern int __vsprintf_chk (char *, int, size_t, const char *,
_G_va_list) __THROW;
extern int __vsnprintf_chk (char *, size_t, int, size_t, const char *,
_G_va_list) __THROW;
extern int __printf_chk (int, const char *, ...);
extern int __fprintf_chk (FILE *, int, const char *, ...);
extern int __vprintf_chk (int, const char *, _G_va_list);
extern int __vfprintf_chk (FILE *, int, const char *, _G_va_list);
/* Prototypes for compatibility functions. */
extern FILE *__new_tmpfile (void);
extern FILE *__old_tmpfile (void);
@ -109,6 +121,8 @@ libc_hidden_proto (fgets_unlocked)
libc_hidden_proto (fputs_unlocked)
libc_hidden_proto (open_memstream)
libc_hidden_proto (__libc_fatal)
libc_hidden_proto (__vsprintf_chk)
libc_hidden_proto (__vsnprintf_chk)
# if !defined NOT_IN_libc && defined SHARED && defined DO_VERSIONING \
&& defined HAVE_VISIBILITY_ATTRIBUTE && !defined HAVE_BROKEN_ALIAS_ATTRIBUTE\

28
include/string.h
View File

@ -3,7 +3,7 @@
#include <sys/types.h>
extern void *__memccpy (void *__dest, __const void *__src,
int __c, size_t __n);
int __c, size_t __n);
extern size_t __strnlen (__const char *__string, size_t __maxlen)
__attribute_pure__;
@ -114,4 +114,30 @@ libc_hidden_builtin_proto (ffs)
# endif
# endif
extern void *__memcpy_chk (void *__restrict __dest,
const void *__restrict __src, size_t __len,
size_t __destlen) __THROW;
extern void *__memmove_chk (void *__dest, const void *__src, size_t __len,
size_t __destlen) __THROW;
extern void *__mempcpy_chk (void *__restrict __dest,
const void *__restrict __src, size_t __len,
size_t __destlen) __THROW;
extern void *__memset_chk (void *__dest, int __ch, size_t __len,
size_t __destlen) __THROW;
extern char *__strcpy_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __destlen) __THROW;
extern char *__stpcpy_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __destlen) __THROW;
extern char *__strncpy_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __len, size_t __destlen) __THROW;
extern char *__strcat_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __destlen) __THROW;
extern char *__strncat_chk (char *__restrict __dest,
const char *__restrict __src,
size_t __len, size_t __destlen) __THROW;
#endif

8
include/sys/cdefs.h
View File

@ -1 +1,9 @@
#ifndef _SYS_CDEFS_H
#include <misc/sys/cdefs.h>
extern void __chk_fail (void) __attribute__ ((__noreturn__));
libc_hidden_proto (__chk_fail)
rtld_hidden_proto (__chk_fail)
#endif

4
libio/Makefile
View File

@ -1,4 +1,4 @@
# Copyright (C) 1995-2002, 2003 Free Software Foundation, Inc.
# Copyright (C) 1995-2002, 2003, 2004 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -22,7 +22,7 @@
subdir := libio
headers := stdio.h libio.h _G_config.h bits/stdio.h bits/stdio-lock.h \
bits/sys_errlist.h
bits/sys_errlist.h bits/stdio2.h
routines := \
filedoalloc iofclose iofdopen iofflush iofgetpos iofgets iofopen \

78
libio/bits/stdio2.h Normal file
View File

@ -0,0 +1,78 @@
/* Checking macros for stdio functions.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _STDIO_H
# error "Never include <bits/stdio2.h> directly; use <stdio.h> instead."
#endif
extern int __sprintf_chk (char *__restrict __s, int __flag, size_t __slen,
__const char *__restrict __format, ...) __THROW;
extern int __vsprintf_chk (char *__restrict __s, int __flag, size_t __slen,
__const char *__restrict __format,
_G_va_list __ap) __THROW;
#define sprintf(str, ...) \
__builtin___sprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), \
__VA_ARGS__)
#define vsprintf(str, fmt, ap) \
__builtin___vsprintf_chk (str, __USE_FORTIFY_LEVEL - 1, __bos (str), fmt, ap)
#if defined __USE_BSD || defined __USE_ISOC99 || defined __USE_UNIX98
extern int __snprintf_chk (char *__restrict __s, size_t __n, int __flag,
size_t __slen, __const char *__restrict __format,
...) __THROW;
extern int __vsnprintf_chk (char *__restrict __s, size_t __n, int __flag,
size_t __slen, __const char *__restrict __format,
_G_va_list __ap) __THROW;
# define snprintf(str, len, ...) \
__builtin___snprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
__VA_ARGS__)
# define vsnprintf(str, len, fmt, ap) \
__builtin___vsnprintf_chk (str, len, __USE_FORTIFY_LEVEL - 1, __bos (str), \
fmt, ap)
#endif
#if __USE_FORTIFY_LEVEL > 1
extern int __fprintf_chk (FILE *__restrict __stream, int __flag,
__const char *__restrict __format, ...);
extern int __printf_chk (int __flag, __const char *__restrict __format, ...);
extern int __vfprintf_chk (FILE *__restrict __stream, int __flag,
__const char *__restrict __format, _G_va_list __ap);
extern int __vprintf_chk (int __flag, __const char *__restrict __format,
_G_va_list __ap);
# define printf(...) \
__printf_chk (__USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
# define fprintf(stream, ...) \
__fprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, __VA_ARGS__)
# define vprintf(format, ap) \
__vprintf_chk (__USE_FORTIFY_LEVEL - 1, format, ap)
# define vfprintf(stream, format, ap) \
__vfprintf_chk (stream, __USE_FORTIFY_LEVEL - 1, format, ap)
#endif
extern char *__gets_chk (char *__str, size_t);
#define gets(__str) \
((__bos (__str) == (size_t) -1) \
? (gets) (__str) : __gets_chk (__str, __bos (__str)))

3
libio/libio.h
View File

@ -139,6 +139,9 @@
#define _IO_FLAGS2_MMAP 1
#define _IO_FLAGS2_NOTCANCEL 2
#ifdef _LIBC
# define _IO_FLAGS2_CHECK_PERCENT_N 4
#endif
/* These are "formatting flags" matching the iostream fmtflags enum values. */
#define _IO_SKIPWS 01

3
libio/stdio.h
View File

@ -827,6 +827,9 @@ extern void funlockfile (FILE *__stream) __THROW;
#ifdef __USE_EXTERN_INLINES
# include <bits/stdio.h>
#endif
#if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
# include <bits/stdio2.h>
#endif
__END_DECLS

10
libio/strfile.h
View File

@ -63,3 +63,13 @@ typedef struct _IO_strfile_
/* frozen: set when the program has requested that the array object not
be altered, reallocated, or freed. */
#define _IO_STR_FROZEN(FP) ((FP)->_f._IO_file_flags & _IO_USER_BUF)
typedef struct
{
_IO_strfile f;
/* This is used for the characters which do not fit in the buffer
provided by the user. */
char overflow_buf[64];
} _IO_strnfile;
extern const struct _IO_jump_t _IO_strn_jumps attribute_hidden;

12
libio/vsnprintf.c
View File

@ -28,16 +28,6 @@
#include "libioP.h"
#include "strfile.h"
typedef struct
{
_IO_strfile f;
/* This is used for the characters which do not fit in the buffer
provided by the user. */
char overflow_buf[64];
} _IO_strnfile;
static int _IO_strn_overflow (_IO_FILE *fp, int c) __THROW;
static int
@ -77,7 +67,7 @@ _IO_strn_overflow (fp, c)
}
static const struct _IO_jump_t _IO_strn_jumps =
const struct _IO_jump_t _IO_strn_jumps attribute_hidden =
{
JUMP_INIT_DUMMY,
JUMP_INIT(finish, _IO_str_finish),

8
libio/vswprintf.c
View File

@ -35,7 +35,7 @@ typedef struct
/* This is used for the characters which do not fit in the buffer
provided by the user. */
wchar_t overflow_buf[64];
} _IO_strnfile;
} _IO_wstrnfile;
static wint_t _IO_wstrn_overflow (_IO_FILE *fp, wint_t c) __THROW;
@ -49,8 +49,8 @@ _IO_wstrn_overflow (fp, c)
filled. But since we must return the number of characters which
would have been written in total we must provide a buffer for
further use. We can do this by writing on and on in the overflow
buffer in the _IO_strnfile structure. */
_IO_strnfile *snf = (_IO_strnfile *) fp;
buffer in the _IO_wstrnfile structure. */
_IO_wstrnfile *snf = (_IO_wstrnfile *) fp;
if (fp->_wide_data->_IO_buf_base != snf->overflow_buf)
{
@ -107,7 +107,7 @@ _IO_vswprintf (string, maxlen, format, args)
const wchar_t *format;
_IO_va_list args;
{
_IO_strnfile sf;
_IO_wstrnfile sf;
int ret;
struct _IO_wide_data wd;
#ifdef _IO_MTSAFE_IO

5
misc/sys/cdefs.h
View File

@ -127,6 +127,11 @@
#endif
/* Fortify support. */
#define __bos(ptr) __builtin_object_size (ptr, __USE_FORTIFY_LEVEL > 1)
#define __bos0(ptr) __builtin_object_size (ptr, 0)
/* Support for flexible arrays. */
#if __GNUC_PREREQ (2,97)
/* GCC 2.97 supports C99 flexible array members. */

19
stdio-common/vfprintf.c
View File

@ -70,6 +70,7 @@
# define INT_T int
# define L_(Str) Str
# define ISDIGIT(Ch) ((unsigned int) ((Ch) - '0') < 10)
# define STR_LEN(Str) strlen (Str)
# define PUT(F, S, N) _IO_sputn ((F), (S), (N))
# define PAD(Padchar) \
@ -86,6 +87,7 @@
# define INT_T wint_t
# define L_(Str) L##Str
# define ISDIGIT(Ch) ((unsigned int) ((Ch) - L'0') < 10)
# define STR_LEN(Str) __wcslen (Str)
# include "_itowa.h"
@ -219,6 +221,9 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
/* For the %m format we may need the current `errno' value. */
int save_errno = errno;
/* 1 if format is in read-only memory, -1 if it is in writable memory,
0 if unknown. */
int readonly_format = 0;
/* This table maps a character into a number representing a
class. In each step there is a destination label for each
@ -877,6 +882,19 @@ vfprintf (FILE *s, const CHAR_T *format, va_list ap)
/* NOTREACHED */ \
\
LABEL (form_number): \
if (s->_flags2 & _IO_FLAGS2_CHECK_PERCENT_N) \
{ \
if (! readonly_format) \
{ \
extern int __readonly_area (const void *, size_t) \
attribute_hidden; \
readonly_format \
= __readonly_area (format, (STR_LEN (format) + 1) \
* sizeof (CHAR_T)); \
} \
if (readonly_format < 0) \
__chk_fail (); \
} \
/* Answer the count of characters written. */ \
if (fspec == NULL) \
{ \
@ -2091,6 +2109,7 @@ buffered_vfprintf (register _IO_FILE *s, const CHAR_T *format,
#ifdef _IO_MTSAFE_IO
hp->_lock = NULL;
#endif
hp->_flags2 = s->_flags2;
_IO_JUMPS (&helper._f) = (struct _IO_jump_t *) &_IO_helper_jumps;
/* Now print to helper instead. */

2
string/Makefile
View File

@ -23,7 +23,7 @@ subdir := string
headers := string.h strings.h memory.h endian.h bits/endian.h \
argz.h envz.h byteswap.h bits/byteswap.h bits/string.h \
bits/string2.h
bits/string2.h bits/string3.h
routines := strcat strchr strcmp strcoll strcpy strcspn \
strverscmp strdup strndup \

167
string/bits/string3.h Normal file
View File

@ -0,0 +1,167 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _STRING_H
# error "Never use <bits/string3.h> directly; include <string.h> instead."
#endif
/* XXX This is temporarily. We should not redefine any of the symbols
and instead integrate the error checking into the original
definitions. */
#undef memcpy
#undef memmove
#undef memset
#undef strcat
#undef strcpy
#undef strncat
#undef strncpy
#ifdef __USE_GNU
# undef mempcpy
# undef stpcpy
#endif
#ifdef __USE_BSD
# undef bcopy
# undef bzero
#endif
#define memcpy(dest, src, len) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___memcpy_chk (dest, src, len, __bos0 (dest)) \
: __memcpy_ichk (dest, src, len))
static __inline__ void *
__attribute__ ((__always_inline__))
__memcpy_ichk (void *__restrict __dest, const void *__restrict __src,
size_t __len)
{
return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
}
#define memmove(dest, src, len) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___memmove_chk (dest, src, len, __bos0 (dest)) \
: __memmove_ichk (dest, src, len))
static __inline__ void *
__attribute__ ((__always_inline__))
__memmove_ichk (void *__dest, const void *__src, size_t __len)
{
return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest));
}
#ifdef __USE_GNU
# define mempcpy(dest, src, len) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___mempcpy_chk (dest, src, len, __bos0 (dest)) \
: __mempcpy_ichk (dest, src, len))
static __inline__ void *
__attribute__ ((__always_inline__))
__mempcpy_ichk (void *__restrict __dest, const void *__restrict __src,
size_t __len)
{
return __builtin___mempcpy_chk (__dest, __src, __len, __bos0 (__dest));
}
#endif
#define memset(dest, ch, len) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___memset_chk (dest, ch, len, __bos0 (dest)) \
: __memset_ichk (dest, ch, len))
static __inline__ void *
__attribute__ ((__always_inline__))
__memset_ichk (void *__dest, int __ch, size_t __len)
{
return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest));
}
#ifdef __USE_BSD
# define bcopy(src, dest, len) ((void) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___memmove_chk (dest, src, len, __bos0 (dest)) \
: __memmove_ichk (dest, src, len)))
# define bzero(dest, len) ((void) \
((__bos0 (dest) != (size_t) -1) \
? __builtin___memset_chk (dest, '\0', len, __bos0 (dest)) \
: __memset_ichk (dest, '\0', len)))
#endif
#define strcpy(dest, src) \
((__bos (dest) != (size_t) -1) \
? __builtin___strcpy_chk (dest, src, __bos (dest)) \
: __strcpy_ichk (dest, src))
static __inline__ char *
__attribute__ ((__always_inline__))
__strcpy_ichk (char *__restrict __dest, const char *__restrict __src)
{
return __builtin___strcpy_chk (__dest, __src, __bos (__dest));
}
#ifdef __USE_GNU
# define stpcpy(dest, src) \
((__bos (dest) != (size_t) -1) \
? __builtin___stpcpy_chk (dest, src, __bos (dest)) \
: __stpcpy_ichk (dest, src))
static __inline__ char *
__attribute__ ((__always_inline__))
__stpcpy_ichk (char *__restrict __dest, const char *__restrict __src)
{
return __builtin___stpcpy_chk (__dest, __src, __bos (__dest));
}
#endif
#define strncpy(dest, src, len) \
((__bos (dest) != (size_t) -1) \
? __builtin___strncpy_chk (dest, src, len, __bos (dest)) \
: __strncpy_ichk (dest, src, len))
static __inline__ char *
__attribute__ ((__always_inline__))
__strncpy_ichk (char *__restrict __dest, const char *__restrict __src,
size_t __len)
{
return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
}
#define strcat(dest, src) \
((__bos (dest) != (size_t) -1) \
? __builtin___strcat_chk (dest, src, __bos (dest)) \
: __strcat_ichk (dest, src))
static __inline__ char *
__attribute__ ((__always_inline__))
__strcat_ichk (char *__restrict __dest, const char *__restrict __src)
{
return __builtin___strcat_chk (__dest, __src, __bos (__dest));
}
#define strncat(dest, src, len) \
((__bos (dest) != (size_t) -1) \
? __builtin___strncat_chk (dest, src, len, __bos (dest)) \
: __strncat_ichk (dest, src, len))
static __inline__ char *
__attribute__ ((__always_inline__))
__strncat_ichk (char *__restrict __dest, const char *__restrict __src,
size_t __len)
{
return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest));
}

5
string/string.h
View File

@ -416,6 +416,11 @@ extern char *basename (__const char *__filename) __THROW __nonnull ((1));
/* These are generic optimizations which do not add too much inline code. */
# include <bits/string2.h>
# endif
# if __USE_FORTIFY_LEVEL > 0 && !defined __cplusplus
/* Functions with security checks. */
# include <bits/string3.h>
# endif
#endif
__END_DECLS

66
sysdeps/generic/memcpy_chk.c Normal file
View File

@ -0,0 +1,66 @@
/* Copy memory to memory until the specified number of bytes
has been copied with error checking. Overlap is NOT handled correctly.
Copyright (C) 1991, 1997, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Torbjorn Granlund (tege@sics.se).
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
#include <pagecopy.h>
void *
__memcpy_chk (dstpp, srcpp, len, dstlen)
void *dstpp;
const void *srcpp;
size_t len;
size_t dstlen;
{
if (__builtin_expect (dstlen < len, 0))
__chk_fail ();
unsigned long int dstp = (long int) dstpp;
unsigned long int srcp = (long int) srcpp;
/* Copy from the beginning to the end. */
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= (-dstp) % OPSIZ;
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
/* Copy whole pages from SRCP to DSTP by virtual address manipulation,
as much as possible. */
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
/* Copy from SRCP to DSTP taking advantage of the known alignment of
DSTP. Number of bytes remaining is put in the third argument,
i.e. in LEN. This number may vary from machine to machine. */
WORD_COPY_FWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_FWD (dstp, srcp, len);
return dstpp;
}

98
sysdeps/generic/memmove_chk.c Normal file
View File

@ -0,0 +1,98 @@
/* Copy memory to memory until the specified number of bytes
has been copied with error checking. Overlap is handled correctly.
Copyright (C) 1991,1995,1996,1997,2003,2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Torbjorn Granlund (tege@sics.se).
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
#include <pagecopy.h>
void *
__memmove_chk (dest, src, len, destlen)
void *dest;
const void *src;
size_t len;
size_t destlen;
{
if (__builtin_expect (destlen < len, 0))
__chk_fail ();
unsigned long int dstp = (long int) dest;
unsigned long int srcp = (long int) src;
/* This test makes the forward copying code be used whenever possible.
Reduces the working set. */
if (dstp - srcp >= len) /* *Unsigned* compare! */
{
/* Copy from the beginning to the end. */
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= (-dstp) % OPSIZ;
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
/* Copy whole pages from SRCP to DSTP by virtual address
manipulation, as much as possible. */
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
/* Copy from SRCP to DSTP taking advantage of the known
alignment of DSTP. Number of bytes remaining is put
in the third argument, i.e. in LEN. This number may
vary from machine to machine. */
WORD_COPY_FWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_FWD (dstp, srcp, len);
}
else
{
/* Copy from the end to the beginning. */
srcp += len;
dstp += len;
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= dstp % OPSIZ;
BYTE_COPY_BWD (dstp, srcp, dstp % OPSIZ);
/* Copy from SRCP to DSTP taking advantage of the known
alignment of DSTP. Number of bytes remaining is put
in the third argument, i.e. in LEN. This number may
vary from machine to machine. */
WORD_COPY_BWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_BWD (dstp, srcp, len);
}
return dest;
}

67
sysdeps/generic/mempcpy_chk.c Normal file
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@ -0,0 +1,67 @@
/* Copy memory to memory until the specified number of bytes
has been copied, return pointer to following byte, with error checking.
Overlap is NOT handled correctly.
Copyright (C) 1991, 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Torbjorn Granlund (tege@sics.se).
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
#include <pagecopy.h>
void *
__mempcpy_chk (dstpp, srcpp, len, dstlen)
void *dstpp;
const void *srcpp;
size_t len;
size_t dstlen;
{
if (__builtin_expect (dstlen < len, 0))
__chk_fail ();
unsigned long int dstp = (long int) dstpp;
unsigned long int srcp = (long int) srcpp;
/* Copy from the beginning to the end. */
/* If there not too few bytes to copy, use word copy. */
if (len >= OP_T_THRES)
{
/* Copy just a few bytes to make DSTP aligned. */
len -= (-dstp) % OPSIZ;
BYTE_COPY_FWD (dstp, srcp, (-dstp) % OPSIZ);
/* Copy whole pages from SRCP to DSTP by virtual address manipulation,
as much as possible. */
PAGE_COPY_FWD_MAYBE (dstp, srcp, len, len);
/* Copy from SRCP to DSTP taking advantage of the known alignment of
DSTP. Number of bytes remaining is put in the third argument,
i.e. in LEN. This number may vary from machine to machine. */
WORD_COPY_FWD (dstp, srcp, len, len);
/* Fall out and copy the tail. */
}
/* There are just a few bytes to copy. Use byte memory operations. */
BYTE_COPY_FWD (dstp, srcp, len);
return (void *) dstp;
}

92
sysdeps/generic/memset_chk.c Normal file
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@ -0,0 +1,92 @@
/* Copyright (C) 1991, 1997, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
void *
__memset_chk (dstpp, c, len, dstlen)
void *dstpp;
int c;
size_t len;
size_t dstlen;
{
if (__builtin_expect (dstlen < len, 0))
__chk_fail ();
long int dstp = (long int) dstpp;
if (len >= 8)
{
size_t xlen;
op_t cccc;
cccc = (unsigned char) c;
cccc |= cccc << 8;
cccc |= cccc << 16;
if (OPSIZ > 4)
/* Do the shift in two steps to avoid warning if long has 32 bits. */
cccc |= (cccc << 16) << 16;
/* There are at least some bytes to set.
No need to test for LEN == 0 in this alignment loop. */
while (dstp % OPSIZ != 0)
{
((byte *) dstp)[0] = c;
dstp += 1;
len -= 1;
}
/* Write 8 `op_t' per iteration until less than 8 `op_t' remain. */
xlen = len / (OPSIZ * 8);
while (xlen > 0)
{
((op_t *) dstp)[0] = cccc;
((op_t *) dstp)[1] = cccc;
((op_t *) dstp)[2] = cccc;
((op_t *) dstp)[3] = cccc;
((op_t *) dstp)[4] = cccc;
((op_t *) dstp)[5] = cccc;
((op_t *) dstp)[6] = cccc;
((op_t *) dstp)[7] = cccc;
dstp += 8 * OPSIZ;
xlen -= 1;
}
len %= OPSIZ * 8;
/* Write 1 `op_t' per iteration until less than OPSIZ bytes remain. */
xlen = len / OPSIZ;
while (xlen > 0)
{
((op_t *) dstp)[0] = cccc;
dstp += OPSIZ;
xlen -= 1;
}
len %= OPSIZ;
}
/* Write the last few bytes. */
while (len > 0)
{
((byte *) dstp)[0] = c;
dstp += 1;
len -= 1;
}
return dstpp;
}

29
sysdeps/generic/readonly-area.c Normal file
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@ -0,0 +1,29 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
/* Return 1 if the whole area PTR .. PTR+SIZE is not writable.
Return -1 if it is writable. */
#include <stdlib.h>
int
__readonly_str (const void *ptr, size_t size)
{
/* The conservative answer is that all strings are writable. */
return -1;
}

45
sysdeps/generic/stpcpy_chk.c Normal file
View File

@ -0,0 +1,45 @@
/* Copyright (C) 1992, 1995, 1997, 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
/* Copy SRC to DEST, returning the address of the terminating '\0' in DEST. */
char *
__stpcpy_chk (dest, src, destlen)
char *dest;
const char *src;
size_t destlen;
{
register char *d = dest;
register const char *s = src;
do
{
if (__builtin_expect (destlen-- == 0, 0))
__chk_fail ();
*d++ = *s;
}
while (*s++ != '\0');
return d - 1;
}

58
sysdeps/generic/strcat_chk.c Normal file
View File

@ -0,0 +1,58 @@
/* Copyright (C) 1991, 1997, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
/* Append SRC on the end of DEST. */
char *
__strcat_chk (dest, src, destlen)
char *dest;
const char *src;
size_t destlen;
{
char *s1 = dest;
const char *s2 = src;
reg_char c;
/* Find the end of the string. */
do
{
if (__builtin_expect (destlen-- == 0, 0))
__chk_fail ();
c = *s1++;
}
while (c != '\0');
/* Make S1 point before the next character, so we can increment
it while memory is read (wins on pipelined cpus). */
++destlen;
s1 -= 2;
do
{
if (__builtin_expect (destlen-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
}
while (c != '\0');
return dest;
}

46
sysdeps/generic/strcpy_chk.c Normal file
View File

@ -0,0 +1,46 @@
/* Copyright (C) 1991, 1997, 2000, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stddef.h>
#include <string.h>
#include <memcopy.h>
#undef strcpy
/* Copy SRC to DEST with checking of destination buffer overflow. */
char *
__strcpy_chk (dest, src, destlen)
char *dest;
const char *src;
size_t destlen;
{
reg_char c;
char *s = (char *) src;
const ptrdiff_t off = dest - s - 1;
do
{
if (__builtin_expect (destlen-- == 0, 0))
__chk_fail ();
c = *s++;
s[off] = c;
}
while (c != '\0');
return dest;
}

100
sysdeps/generic/strncat_chk.c Normal file
View File

@ -0,0 +1,100 @@
/* Copyright (C) 1991, 1997, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
char *
__strncat_chk (s1, s2, n, s1len)
char *s1;
const char *s2;
size_t n;
size_t s1len;
{
reg_char c;
char *s = s1;
/* Find the end of S1. */
do
{
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s1++;
}
while (c != '\0');
/* Make S1 point before next character, so we can increment
it while memory is read (wins on pipelined cpus). */
++s1len;
s1 -= 2;
if (n >= 4)
{
size_t n4 = n >> 2;
do
{
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
if (c == '\0')
return s;
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
if (c == '\0')
return s;
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
if (c == '\0')
return s;
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
if (c == '\0')
return s;
} while (--n4 > 0);
n &= 3;
}
while (n > 0)
{
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
c = *s2++;
*++s1 = c;
if (c == '\0')
return s;
n--;
}
if (c != '\0')
{
if (__builtin_expect (s1len-- == 0, 0))
__chk_fail ();
*++s1 = '\0';
}
return s;
}

89
sysdeps/generic/strncpy_chk.c Normal file
View File

@ -0,0 +1,89 @@
/* Copyright (C) 1991, 1997, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <string.h>
#include <memcopy.h>
char *
__strncpy_chk (s1, s2, n, s1len)
char *s1;
const char *s2;
size_t n;
size_t s1len;
{
reg_char c;
char *s = s1;
if (__builtin_expect (s1len < n, 0))
__chk_fail ();
--s1;
if (n >= 4)
{
size_t n4 = n >> 2;
for (;;)
{
c = *s2++;
*++s1 = c;
if (c == '\0')
break;
c = *s2++;
*++s1 = c;
if (c == '\0')
break;
c = *s2++;
*++s1 = c;
if (c == '\0')
break;
c = *s2++;
*++s1 = c;
if (c == '\0')
break;
if (--n4 == 0)
goto last_chars;
}
n = n - (s1 - s) - 1;
if (n == 0)
return s;
goto zero_fill;
}
last_chars:
n &= 3;
if (n == 0)
return s;
do
{
c = *s2++;
*++s1 = c;
if (--n == 0)
return s;
}
while (c != '\0');
zero_fill:
do
*++s1 = '\0';
while (--n > 0);
return s;
}

9
sysdeps/i386/i686/memcpy.S
View File

@ -1,7 +1,7 @@
/* Copy memory block and return pointer to beginning of destination block
For Intel 80x86, x>=6.
This file is part of the GNU C Library.
Copyright (C) 1999, 2000, 2003 Free Software Foundation, Inc.
Copyright (C) 1999, 2000, 2003, 2004 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
The GNU C Library is free software; you can redistribute it and/or
@ -31,6 +31,13 @@
#define LEN SRC+PTR_SIZE
.text
#if defined PIC && !defined NOT_IN_libc
ENTRY (__memcpy_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memcpy_chk)
#endif
ENTRY (BP_SYM (memcpy))
ENTER

35
sysdeps/i386/i686/memcpy_chk.S Normal file
View File

@ -0,0 +1,35 @@
/* Checking memcpy for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memcpy.S.
For libc.a, this is a separate source to avoid
memcpy bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memcpy_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp memcpy
END (__memcpy_chk)
#endif

9
sysdeps/i386/i686/memmove.S
View File

@ -1,7 +1,7 @@
/* Copy memory block and return pointer to beginning of destination block
For Intel 80x86, x>=6.
This file is part of the GNU C Library.
Copyright (C) 2003 Free Software Foundation, Inc.
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
Contributed by Ulrich Drepper <drepper@cygnus.com>, 2003.
The GNU C Library is free software; you can redistribute it and/or
@ -31,6 +31,13 @@
#define LEN SRC+PTR_SIZE
.text
#if defined PIC && !defined NOT_IN_libc
ENTRY (__memmove_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memmove_chk)
#endif
ENTRY (BP_SYM (memmove))
ENTER

35
sysdeps/i386/i686/memmove_chk.S Normal file
View File

@ -0,0 +1,35 @@
/* Checking memmove for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memmove.S.
For libc.a, this is a separate source to avoid
memmove bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memmove_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp memmove
END (__memmove_chk)
#endif

7
sysdeps/i386/i686/mempcpy.S
View File

@ -31,6 +31,13 @@
#define LEN SRC+PTR_SIZE
.text
#if defined PIC && !defined NOT_IN_libc
ENTRY (__mempcpy_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__mempcpy_chk)
#endif
ENTRY (BP_SYM (__mempcpy))
ENTER

35
sysdeps/i386/i686/mempcpy_chk.S Normal file
View File

@ -0,0 +1,35 @@
/* Checking mempcpy for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in mempcpy.S.
For libc.a, this is a separate source to avoid
mempcpy bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__mempcpy_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp mempcpy
END (__mempcpy_chk)
#endif

7
sysdeps/i386/i686/memset.S
View File

@ -39,6 +39,13 @@
#endif
.text
#if defined PIC && !defined NOT_IN_libc && !BZERO_P
ENTRY (__memset_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memset_chk)
#endif
ENTRY (BP_SYM (memset))
ENTER

35
sysdeps/i386/i686/memset_chk.S Normal file
View File

@ -0,0 +1,35 @@
/* Checking memset for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memset.S.
For libc.a, this is a separate source to avoid
memset bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memset_chk)
movl 12(%esp), %eax
cmpl %eax, 16(%esp)
jb __chk_fail
jmp memset
END (__memset_chk)
#endif

90
sysdeps/unix/sysv/linux/readonly-area.c Normal file
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@ -0,0 +1,90 @@
/* Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <stdint.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include "libio/libioP.h"
/* Return 1 if the whole area PTR .. PTR+SIZE is not writable.
Return -1 if it is writable. */
int
__readonly_area (const char *ptr, size_t size)
{
const void *ptr_end = ptr + size;
FILE *fp = fopen ("/proc/self/maps", "rc");
if (fp == NULL)
return -1;
/* We need no locking. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
char *line = NULL;
size_t linelen = 0;
while (! feof_unlocked (fp))
{
if (_IO_getdelim (&line, &linelen, '\n', fp) <= 0)
break;
char *p;
uintptr_t from = strtoul (line, &p, 16);
if (p == line || *p++ != '-')
break;
char *q;
uintptr_t to = strtoul (p, &q, 16);
if (q == p || *q++ != ' ')
break;
if (from < (uintptr_t) ptr_end && to > (uintptr_t) ptr)
{
/* Found an entry that at least partially covers the area. */
if (*q++ != 'r' || *q++ != '-')
break;
if (from <= (uintptr_t) ptr && to >= (uintptr_t) ptr_end)
{
size = 0;
break;
}
else if (from <= (uintptr_t) ptr)
size -= to - (uintptr_t) ptr;
else if (to >= (uintptr_t) ptr_end)
size -= (uintptr_t) ptr_end - from;
else
size -= to - from;
if (!size)
break;
}
}
fclose (fp);
free (line);
/* If the whole area between ptr and ptr_end is covered by read-only
VMAs, return 1. Otherwise return -1. */
return size == 0 ? 1 : -1;
}

6
sysdeps/x86_64/memcpy.S
View File

@ -29,6 +29,12 @@
#define MEMPCPY_P (defined memcpy)
.text
#if defined PIC && !defined NOT_IN_libc
ENTRY (__memcpy_chk)
cmpq %rdx, %rcx
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memcpy_chk)
#endif
ENTRY (BP_SYM (memcpy))
/* Cutoff for the big loop is a size of 32 bytes since otherwise
the loop will never be entered. */

34
sysdeps/x86_64/memcpy_chk.S Normal file
View File

@ -0,0 +1,34 @@
/* Checking memcpy for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memcpy.S.
For libc.a, this is a separate source to avoid
memcpy bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memcpy_chk)
cmpq %rdx, %rcx
jb __chk_fail
jmp memcpy
END (__memcpy_chk)
#endif

1
sysdeps/x86_64/mempcpy.S
View File

@ -1,4 +1,5 @@
#define memcpy __mempcpy
#define __memcpy_chk __mempcpy_chk
#include <sysdeps/x86_64/memcpy.S>
libc_hidden_def (BP_SYM (__mempcpy))

34
sysdeps/x86_64/mempcpy_chk.S Normal file
View File

@ -0,0 +1,34 @@
/* Checking mempcpy for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memcpy.S.
For libc.a, this is a separate source to avoid
mempcpy bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__mempcpy_chk)
cmpq %rdx, %rcx
jb __chk_fail
jmp mempcpy
END (__mempcpy_chk)
#endif

8
sysdeps/x86_64/memset.S
View File

@ -1,6 +1,6 @@
/* memset/bzero -- set memory area to CH/0
Optimized version for x86-64.
Copyright (C) 2002, 2003 Free Software Foundation, Inc.
Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>.
@ -32,6 +32,12 @@
#define LARGE $120000
.text
#if !BZERO_P && defined PIC && !defined NOT_IN_libc
ENTRY (__memset_chk)
cmpq %rdx, %rcx
jb HIDDEN_JUMPTARGET (__chk_fail)
END (__memset_chk)
#endif
ENTRY (memset)
#if BZERO_P
mov %rsi,%rdx /* Adjust parameter. */

34
sysdeps/x86_64/memset_chk.S Normal file
View File

@ -0,0 +1,34 @@
/* Checking memset for x86-64.
Copyright (C) 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#ifndef PIC
/* For libc.so this is defined in memset.S.
For libc.a, this is a separate source to avoid
memset bringing in __chk_fail and all routines
it calls. */
.text
ENTRY (__memset_chk)
cmpq %rdx, %rcx
jb __chk_fail
jmp memset
END (__memset_chk)
#endif

3
sysdeps/x86_64/stpcpy_chk.S Normal file
View File

@ -0,0 +1,3 @@
#define USE_AS_STPCPY_CHK
#define STRCPY_CHK __stpcpy_chk
#include <sysdeps/x86_64/strcpy_chk.S>

211
sysdeps/x86_64/strcpy_chk.S Normal file
View File

@ -0,0 +1,211 @@
/* strcpy/stpcpy checking implementation for x86-64.
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Andreas Jaeger <aj@suse.de>, 2002.
Adopted into checking version by Jakub Jelinek <jakub@redhat.com>.
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
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include "asm-syntax.h"
#include "bp-sym.h"
#include "bp-asm.h"
#ifndef USE_AS_STPCPY_CHK
# define STRCPY_CHK __strcpy_chk
#endif
.text
ENTRY (STRCPY_CHK)
movq %rsi, %rcx /* Source register. */
andl $7, %ecx /* mask alignment bits */
#ifndef USE_AS_STPCPY_CHK
movq %rdi, %r10 /* Duplicate destination pointer. */
#endif
jz 5f /* aligned => start loop */
cmpq $8, %rdx /* Check if only few bytes left in
destination. */
jb 50f
subq $8, %rcx /* We need to align to 8 bytes. */
addq %rcx, %rdx /* Subtract count of stored bytes
in the cycle below from destlen. */
/* Search the first bytes directly. */
0:
movb (%rsi), %al /* Fetch a byte */
testb %al, %al /* Is it NUL? */
movb %al, (%rdi) /* Store it */
jz 4f /* If it was NUL, done! */
incq %rsi
incq %rdi
incl %ecx
jnz 0b
5:
movq $0xfefefefefefefeff,%r8
cmpq $32, %rdx /* Are there enough bytes in destination
for the next unrolled round? */
jb 60f /* If not, avoid the unrolled loop. */
/* Now the sources is aligned. Unfortunatly we cannot force
to have both source and destination aligned, so ignore the
alignment of the destination. */
.p2align 4
1:
/* 1st unroll. */
movq (%rsi), %rax /* Read double word (8 bytes). */
addq $8, %rsi /* Adjust pointer for next word. */
movq %rax, %r9 /* Save a copy for NUL finding. */
addq %r8, %r9 /* add the magic value to the word. We get
carry bits reported for each byte which
is *not* 0 */
jnc 3f /* highest byte is NUL => return pointer */
xorq %rax, %r9 /* (word+magic)^word */
orq %r8, %r9 /* set all non-carry bits */
incq %r9 /* add 1: if one carry bit was *not* set
the addition will not result in 0. */
jnz 3f /* found NUL => return pointer */
movq %rax, (%rdi) /* Write value to destination. */
addq $8, %rdi /* Adjust pointer. */
/* 2nd unroll. */
movq (%rsi), %rax /* Read double word (8 bytes). */
addq $8, %rsi /* Adjust pointer for next word. */
movq %rax, %r9 /* Save a copy for NUL finding. */
addq %r8, %r9 /* add the magic value to the word. We get
carry bits reported for each byte which
is *not* 0 */
jnc 3f /* highest byte is NUL => return pointer */
xorq %rax, %r9 /* (word+magic)^word */
orq %r8, %r9 /* set all non-carry bits */
incq %r9 /* add 1: if one carry bit was *not* set
the addition will not result in 0. */
jnz 3f /* found NUL => return pointer */
movq %rax, (%rdi) /* Write value to destination. */
addq $8, %rdi /* Adjust pointer. */
/* 3rd unroll. */
movq (%rsi), %rax /* Read double word (8 bytes). */
addq $8, %rsi /* Adjust pointer for next word. */
movq %rax, %r9 /* Save a copy for NUL finding. */
addq %r8, %r9 /* add the magic value to the word. We get
carry bits reported for each byte which
is *not* 0 */
jnc 3f /* highest byte is NUL => return pointer */
xorq %rax, %r9 /* (word+magic)^word */
orq %r8, %r9 /* set all non-carry bits */
incq %r9 /* add 1: if one carry bit was *not* set
the addition will not result in 0. */
jnz 3f /* found NUL => return pointer */
movq %rax, (%rdi) /* Write value to destination. */
addq $8, %rdi /* Adjust pointer. */
/* 4th unroll. */
movq (%rsi), %rax /* Read double word (8 bytes). */
addq $8, %rsi /* Adjust pointer for next word. */
movq %rax, %r9 /* Save a copy for NUL finding. */
addq %r8, %r9 /* add the magic value to the word. We get
carry bits reported for each byte which
is *not* 0 */
jnc 3f /* highest byte is NUL => return pointer */
xorq %rax, %r9 /* (word+magic)^word */
orq %r8, %r9 /* set all non-carry bits */
incq %r9 /* add 1: if one carry bit was *not* set
the addition will not result in 0. */
jnz 3f /* found NUL => return pointer */
subq $32, %rdx /* Adjust destlen. */
movq %rax, (%rdi) /* Write value to destination. */
addq $8, %rdi /* Adjust pointer. */
cmpq $32, %rdx /* Are there enough bytes in destination
for the next unrolled round? */
jae 1b /* Next iteration. */
60:
cmpq $8, %rdx /* Are there enough bytes in destination
for the next unrolled round? */
jb 50f /* Now, copy and check byte by byte. */
movq (%rsi), %rax /* Read double word (8 bytes). */
addq $8, %rsi /* Adjust pointer for next word. */
movq %rax, %r9 /* Save a copy for NUL finding. */
addq %r8, %r9 /* add the magic value to the word. We get
carry bits reported for each byte which
is *not* 0 */
jnc 3f /* highest byte is NUL => return pointer */
xorq %rax, %r9 /* (word+magic)^word */
orq %r8, %r9 /* set all non-carry bits */
incq %r9 /* add 1: if one carry bit was *not* set
the addition will not result in 0. */
jnz 3f /* found NUL => return pointer */
subq $8, %rdx /* Adjust destlen. */
movq %rax, (%rdi) /* Write value to destination. */
addq $8, %rdi /* Adjust pointer. */
jmp 60b /* Next iteration. */
/* Do the last few bytes. %rax contains the value to write.
The loop is unrolled twice. */
.p2align 4
3:
/* Note that stpcpy needs to return with the value of the NUL
byte. */
movb %al, (%rdi) /* 1st byte. */
testb %al, %al /* Is it NUL. */
jz 4f /* yes, finish. */
incq %rdi /* Increment destination. */
movb %ah, (%rdi) /* 2nd byte. */
testb %ah, %ah /* Is it NUL?. */
jz 4f /* yes, finish. */
incq %rdi /* Increment destination. */
shrq $16, %rax /* Shift... */
jmp 3b /* and look at next two bytes in %rax. */
51:
/* Search the bytes directly, checking for overflows. */
incq %rsi
incq %rdi
decq %rdx
jz HIDDEN_JUMPTARGET (__chk_fail)
52:
movb (%rsi), %al /* Fetch a byte */
testb %al, %al /* Is it NUL? */
movb %al, (%rdi) /* Store it */
jnz 51b /* If it was NUL, done! */
4:
#ifdef USE_AS_STPCPY_CHK
movq %rdi, %rax /* Destination is return value. */
#else
movq %r10, %rax /* Source is return value. */
#endif
retq
50:
testq %rdx, %rdx
jnz 52b
jmp HIDDEN_JUMPTARGET (__chk_fail)
END (STRCPY_CHK)