Module Name: src
Committed By: skrll
Date: Fri Nov 2 08:18:19 UTC 2018
Modified Files:
src/sys/arch/aarch64/include: asan.h
Log Message:
Provide a kasan_md_unwind
OK maxv
To generate a diff of this commit:
cvs rdiff -u -r1.1 -r1.2 src/sys/arch/aarch64/include/asan.h
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/aarch64/include/asan.h
diff -u src/sys/arch/aarch64/include/asan.h:1.1 src/sys/arch/aarch64/include/asan.h:1.2
--- src/sys/arch/aarch64/include/asan.h:1.1 Thu Nov 1 20:34:50 2018
+++ src/sys/arch/aarch64/include/asan.h Fri Nov 2 08:18:18 2018
@@ -1,4 +1,4 @@
-/* $NetBSD: asan.h,v 1.1 2018/11/01 20:34:50 maxv Exp $ */
+/* $NetBSD: asan.h,v 1.2 2018/11/02 08:18:18 skrll Exp $ */
/*
* Copyright (c) 2018 The NetBSD Foundation, Inc.
@@ -30,6 +30,8 @@
*/
#include <sys/atomic.h>
+#include <sys/ksyms.h>
+
#include <aarch64/pmap.h>
#include <aarch64/vmparam.h>
#include <aarch64/cpufunc.h>
@@ -133,4 +135,57 @@ kasan_md_init(void)
eva - VM_MIN_KERNEL_ADDRESS);
}
-#define kasan_md_unwind() __nothing
+static inline bool
+__md_unwind_end(const char *name)
+{
+ if (!strncmp(name, "el0_trap", 8) ||
+ !strncmp(name, "el1_trap", 8)) {
+ return true;
+ }
+
+ return false;
+}
+
+static void
+kasan_md_unwind(void)
+{
+ uint64_t lr, *fp;
+ const char *mod;
+ const char *sym;
+ size_t nsym;
+ int error;
+
+ fp = (uint64_t *)__builtin_frame_address(0);
+ nsym = 0;
+
+ while (1) {
+ /*
+ * normal stack frame
+ * fp[0] saved fp(x29) value
+ * fp[1] saved lr(x30) value
+ */
+ lr = fp[1];
+
+ if (lr < VM_MIN_KERNEL_ADDRESS) {
+ break;
+ }
+ error = ksyms_getname(&mod, &sym, (vaddr_t)lr, KSYMS_PROC);
+ if (error) {
+ break;
+ }
+ printf("#%zu %p in %s <%s>\n", nsym, (void *)lr, sym, mod);
+ if (__md_unwind_end(sym)) {
+ break;
+ }
+
+ fp = (uint64_t *)fp[0];
+ if (fp == NULL) {
+ break;
+ }
+ nsym++;
+
+ if (nsym >= 15) {
+ break;
+ }
+ }
+}
