first attempt at enabling stack protector support

the code is written to pre-init the thread pointer in static linked
programs that pull in __stack_chk_fail or dynamic-linked programs that
lookup the symbol. no explicit canary is set; the canary will be
whatever happens to be in the thread structure at the offset gcc
hard-coded. this can be improved later.

1 files changed, 14 insertions, 0 deletions

diff --git a/src/env/__stack_chk_fail.c b/src/env/__stack_chk_fail.c
new file mode 100644
index 00000000..bbba3511
--- /dev/null
+++ b/src/env/__stack_chk_fail.c
@@ -0,0 +1,14 @@
+#include "pthread_impl.h"
+#include "atomic.h"
+
+void __init_ssp(void)
+{
+#ifndef __PIC__
+	__pthread_self_init();
+#endif
+}
+
+void __stack_chk_fail(void)
+{
+	a_crash();
+}