Add Propolice support

git-svn-id: svn://coreboot.org/openbios/openbios-devel@422 f158a5a8-5612-0410-a976-696ce0be7e32

config/examples/sparc64_rules.xml

@@ -38,10 +38,6 @@ CFLAGS+= -Wundef -Wendif-labels -Wstrict-aliasing -Wwrite-strings -Wmissing-prot
 INCLUDES := -I$(SRCDIR)/include -I$(SRCDIR)/kernel/include -I$(ODIR)/target/include
 AS_FLAGS := -Wa,-xarch=v9b -Wa,-64 -g
 
-ifeq ($(shell uname), OpenBSD)
-	CFLAGS+= -fno-stack-protector
-endif
-
 #
 # pre rules
 #

include/libc/string.h

@@ -99,4 +99,9 @@ static inline unsigned char __toupper(unsigned char c) {
 
 extern int errno_int;
 
+// Propolice support
+extern long __guard[8];
+
+void __stack_smash_handler(const char *func, int damaged);
+
 #endif   /* _H_STRING */

libc/misc.c

@@ -75,3 +75,24 @@ strtol( const char *nptr, char **endptr, int base )
 
 	return sum * sign;
 }
+
+// Propolice support
+long __guard[8] = {
+#ifdef CONFIG_BIG_ENDIAN
+    (0 << 24) | (0 << 16) | ('\n' << 8) | 255,
+#else
+    (255 << 24) | ('\n' << 16) | (0 << 8) | 0,
+#endif
+    0, 0, 0, 0, 0, 0, 0
+};
+
+void __stack_smash_handler(const char *func, int damaged)
+{
+    printk("Propolice detected a stack smashing attack %x at function %s,"
+           " freezing\n", damaged, func);
+
+    // Freeze
+    // XXX: Disable interrupts?
+    for(;;)
+        ;
+}