arm/backtrace/unwind: skip unaligned instruction

Signed-off-by: chao an <anchao@xiaomi.com>
2023-02-22 12:34:48 +08:00 · 2023-02-22 12:34:48 +08:00 · 0e873b51c6
parent 9c30d3bf33
commit 0e873b51c6
1 changed files with 5 additions and 1 deletions
--- a/arch/arm/src/common/arm_backtrace_unwind.c
+++ b/arch/arm/src/common/arm_backtrace_unwind.c
@ -470,7 +470,11 @@ int unwind_frame(struct unwind_frame_s *frame)

  /* Check the personality routine */

-  if ((*ctrl.insn & 0xff000000) == 0x80000000)
+  if (((uintptr_t)ctrl.insn & 0x3) != 0)
+    {
+      return -1;
+    }
+  else if ((*ctrl.insn & 0xff000000) == 0x80000000)
    {
      ctrl.byte = 2;
      ctrl.entries = 1;