minios: _chk_fail and _chk canaries for minios and newlib

Add __stack_chk_fail to mini-os and __sprintf_chk __fprintf_chk to
newlib, to cope with ocaml runtimes compiled with -fstack-protector.

From: "George S. Coker, II" <gscoker@alpha.ncsc.mil>
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

1 files changed, 8 insertions, 0 deletions

diff --git a/extras/mini-os/lib/stack_chk_fail.c b/extras/mini-os/lib/stack_chk_fail.c
new file mode 100644
index 0000000000..ade0045f0a
--- /dev/null
+++ b/extras/mini-os/lib/stack_chk_fail.c
@@ -0,0 +1,8 @@
+#include <kernel.h>
+#include <console.h>
+
+void __stack_chk_fail(void)
+{
+    printk("stack smashing detected\n");
+    do_exit();
+}