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-rw-r--r--sysdeps/i386/jmp_buf.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/sysdeps/i386/jmp_buf.h b/sysdeps/i386/jmp_buf.h
index 7686c4d278..7949883b60 100644
--- a/sysdeps/i386/jmp_buf.h
+++ b/sysdeps/i386/jmp_buf.h
@@ -7,3 +7,8 @@ typedef struct
     __ptr_t __sp;
     __ptr_t __pc;
   } __jmp_buf[1];
+
+/* Test if longjmp to JMPBUF would unwind the frame
+   containing a local variable at ADDRESS.  */
+#define _JMPBUF_UNWINDS(jmpbuf, address) \
+  ((__ptr_t) (address) < (jmpbuf)[0].__sp)