diff options
Diffstat (limited to 'sysdeps/x86_64/setjmp.S')
| -rw-r--r-- | sysdeps/x86_64/setjmp.S | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/sysdeps/x86_64/setjmp.S b/sysdeps/x86_64/setjmp.S index 87c095238c..5639292da4 100644 --- a/sysdeps/x86_64/setjmp.S +++ b/sysdeps/x86_64/setjmp.S @@ -1,5 +1,5 @@ /* setjmp for x86-64. - Copyright (C) 2001, 2003, 2005, 2006 Free Software Foundation, Inc. + Copyright (C) 2001-2012 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 @@ -24,9 +24,16 @@ ENTRY (__sigsetjmp) /* Save registers. */ movq %rbx, (JB_RBX*8)(%rdi) #ifdef PTR_MANGLE - movq %rbp, %rax - PTR_MANGLE (%rax) - movq %rax, (JB_RBP*8)(%rdi) +# ifdef __ILP32__ + /* Save the high bits of %rbp first, since PTR_MANGLE will + only handle the low bits but we cannot presume %rbp is + being used as a pointer and truncate it. Here we write all + of %rbp, but the low bits will be overwritten below. */ + movq %rbp, (JB_RBP*8)(%rdi) +# endif + mov %RBP_LP, %RAX_LP + PTR_MANGLE (%RAX_LP) + mov %RAX_LP, (JB_RBP*8)(%rdi) #else movq %rbp, (JB_RBP*8)(%rdi) #endif |