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-rw-r--r--sysdeps/alpha/bits/setjmp.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/sysdeps/alpha/bits/setjmp.h b/sysdeps/alpha/bits/setjmp.h
index de37019218..af0b5ae577 100644
--- a/sysdeps/alpha/bits/setjmp.h
+++ b/sysdeps/alpha/bits/setjmp.h
@@ -74,4 +74,10 @@
#ifndef __ASSEMBLY__
typedef long int __jmp_buf[17];
+
+/* Test if longjmp to JMPBUF would unwind the frame containing a local
+ variable at ADDRESS. */
+#define _JMPBUF_UNWINDS(_jmpbuf, _address) \
+ ({ register void *_sp __asm__("$30"); void *_addr = (_address); \
+ _sp <= _addr && _addr < (void *)((_jmpbuf)[JB_SP]); })
#endif