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-rw-r--r--sysdeps/x86_64/bits/setjmp.h41
1 files changed, 40 insertions, 1 deletions
diff --git a/sysdeps/x86_64/bits/setjmp.h b/sysdeps/x86_64/bits/setjmp.h
index c9b98b2e3b..96646efdda 100644
--- a/sysdeps/x86_64/bits/setjmp.h
+++ b/sysdeps/x86_64/bits/setjmp.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001,2002,2003,2005,2006 Free Software Foundation, Inc.
+/* Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -26,6 +26,36 @@
 
 #include <bits/wordsize.h>
 
+#if __WORDSIZE == 64
+
+/* We only need to save callee-saved registers plus stackpointer and
+   program counter.  */
+# if defined __USE_MISC || defined _ASM
+#  define JB_RBX	0
+#  define JB_RBP	1
+#  define JB_R12	2
+#  define JB_R13	3
+#  define JB_R14	4
+#  define JB_R15	5
+#  define JB_RSP	6
+#  define JB_PC	7
+#  define JB_SIZE (8*8)
+# endif
+
+#else
+
+# if defined __USE_MISC || defined _ASM
+#  define JB_BX	0
+#  define JB_SI	1
+#  define JB_DI	2
+#  define JB_BP	3
+#  define JB_SP	4
+#  define JB_PC	5
+#  define JB_SIZE 24
+# endif
+
+#endif
+
 #ifndef _ASM
 
 # if __WORDSIZE == 64
@@ -34,6 +64,15 @@ typedef long int __jmp_buf[8];
 typedef int __jmp_buf[6];
 # endif
 
+/* Test if longjmp to JMPBUF would unwind the frame
+   containing a local variable at ADDRESS.  */
+# if __WORDSIZE == 64
+#  define _JMPBUF_UNWINDS(jmpbuf, address) \
+  ((void *) (address) < (void *) (jmpbuf)[JB_RSP])
+# else
+#  define _JMPBUF_UNWINDS(jmpbuf, address) \
+  ((void *) (address) < (void *) (jmpbuf)[JB_SP])
+# endif
 #endif
 
 #endif  /* bits/setjmp.h */