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7 Commits

Author SHA1 Message Date
Ulrich Drepper 15a856b109 Make stack canary value harder to read through read overflow 2011-05-15 10:59:07 -04:00
Ulrich Drepper a3bd28468c * sysdeps/generic/dl-osinfo.h (_dl_setup_stack_chk_guard): Use 
memcpy instead of memcmp.
	(_dl_setup_pointer_guard): Likewise.
 2009-01-30 20:23:23 +00:00
Ulrich Drepper 965cb60a21 * sysdeps/generic/dl-osinfo.h (_dl_setup_stack_chk_guard): Take 
one parameter.  If non-NULL use it to initialize return value.
	(_dl_setup_pointer_guard): New function.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise.
	* sysdeps/generic/ldsodefs.h: Declare _dl_random.
	* elf/rtld.c (security_init): Pass _dl_random to
	_dl_setup_stack_chk_guard.  Call _dl_setup_pointer_guard to initialize
	pointer_chk_guard.
	* elf/dl-sysdep.c (_dl_random): New variable.
	(_dl_sysdep_start): Handle AT_RANDOM.
	(_dl_show_auxv): Likewise.
	* elf/dl-support.c (_dl_random): New variable.
	(_dl_aux_init): Handle AT_RANDOM.
	* csu/libc-start.c [!SHARED] (libc_start_main): Pass _dl_random
	to _dl_setup_stack_chk_guard.

	* elf/elf.h (AT_RANDOM): Define AT_BASE_PLATFORM and AT_RANDOM.
 2009-01-11 04:44:06 +00:00
Ulrich Drepper 35f1e82763 * Versions.def (ld): Add GLIBC_2.4. 
* configure.in: Add --enable-stackguard-randomization option.
	(ENABLE_STACKGUARD_RANDOMIZE): New define.
	* config.h.in (ENABLE_STACKGUARD_RANDOMIZE): Add.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: Include stdint.h.
	(_dl_setup_stack_chk_guard): New inline function.
	* sysdeps/generic/dl-osinfo.h: Include stdint.h.
	(_dl_setup_stack_chk_guard): New inline function.
	* elf/rtld.c (__stack_chk_guard): New variable.
	(dl_main): Remove all traces of TLS_INIT_TP_EXPENSIVE.
	Set __stack_chk_guard to _dl_setup_stack_chk_guard (),
	use THREAD_SET_STACK_GUARD if defined.
	* elf/Versions (ld): Export __stack_chk_guard@@GLIBC_2.4.
	* sysdeps/generic/libc-start.c (__stack_chk_guard): New variable.
	(__libc_start_main): Set __stack_chk_guard to
	_dl_setup_stack_chk_guard (), use THREAD_SET_STACK_GUARD if defined.
	* sysdeps/generic/libc-tls.c (__libc_setup_tls): Remove all
	traces of TLS_INIT_TP_EXPENSIVE.
	* debug/Versions (libc): Export __stack_chk_fail@@GLIBC_2.4.
	* debug/Makefile (routines): Add stack_chk_fail.
	(static-only-routines): Add stack_chk_fail_local.
	* debug/stack_chk_fail_local.c: New file.
	* debug/stack_chk_fail.c: New file.
	* elf/Makefile: Add rules to build and run tst-stackguard1{,-static}
	tests.
	* elf/tst-stackguard1.c: New file.
	* elf/tst-stackguard1-static.c: New file.
	* elf/stackguard-macros.h: New file.
 2005-06-26 18:14:26 +00:00
Ulrich Drepper a334319f65 (CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4. 2004-12-22 20:10:10 +00:00
Jakub Jelinek 0ecb606cb6 2.5-18.1 2007-07-12 18:26:36 +00:00
Ulrich Drepper 32b4fe6a63 Update. 
* elf/Makefile (distribute): Add dl-osinfo.h.
	* sysdeps/generic/dl-osinfo.h: New file.
	* sysdeps/unix/sysv/linux/dl-osinfo.h: New file.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Use DL_SYSDEP_OSCHECK
	if defined.
	* sysdeps/unix/sysv/linux/init-first.c: Perform kernel version test
	only for !SHARED case.  Get the code from dl-osinfo.h.
 2000-08-22 17:48:22 +00:00