* 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.

1 files changed, 17 insertions, 0 deletions

diff --git a/configure b/configure
index 8c978e7512..402da463f9 100755
--- a/configure
+++ b/configure
@@ -873,6 +873,9 @@ Optional Features:
                           objects [default=yes if supported]
   --enable-oldest-abi=ABI configure the oldest ABI supported [e.g. 2.2]
                           [default=glibc default]
+  --enable-stackguard-randomization
+                          initialize __stack_chk_guard canary with a random
+                          number at program start
   --enable-add-ons[=DIRS...]
                           configure and build add-ons in DIR1,DIR2,... search
                           for add-ons if no parameter given
@@ -1597,6 +1600,20 @@ _ACEOF
 fi
 
 
+# Check whether --enable-stackguard-randomization or --disable-stackguard-randomization was given.
+if test "${enable_stackguard_randomization+set}" = set; then
+  enableval="$enable_stackguard_randomization"
+  enable_stackguard_randomize=$enableval
+else
+  enable_stackguard_randomize=no
+fi;
+if test "$enable_stackguard_randomize" = yes; then
+  cat >>confdefs.h <<\_ACEOF
+#define ENABLE_STACKGUARD_RANDOMIZE 1
+_ACEOF
+
+fi
+
 # Check whether --enable-add-ons or --disable-add-ons was given.
 if test "${enable_add_ons+set}" = set; then
   enableval="$enable_add_ons"