Per-CPU variables, TCB and SSP supportarm_port_dev

1 files changed, 40 insertions, 0 deletions

diff --git a/arch/arm/machine/ssp.c b/arch/arm/machine/ssp.c
new file mode 100644
index 00000000..eb923dd8
--- /dev/null
+++ b/arch/arm/machine/ssp.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2017 Richard Braun.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdint.h>
+
+#include <kern/macros.h>
+#include <kern/panic.h>
+
+#ifdef __LP64__
+#define SSP_GUARD_WORD 0xdeadd00ddeadd00d
+#else
+#define SSP_GUARD_WORD 0xdeadd00d
+#endif
+
+__used uintptr_t ssp_guard_word = SSP_GUARD_WORD;
+__used extern uintptr_t __stack_chk_guard __attribute__((alias("ssp_guard_word")));
+
+void ssp_panic(void);
+
+__used void
+ssp_panic(void)
+{
+    panic("ssp: stack corruption detected");
+}
+
+__used void __stack_chk_fail(void) __attribute__((alias("ssp_panic")));