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Maintain stack alignment in ____longjmp_chk on x86_64

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Andreas Schwab 2011-04-07 16:23:52 -04:00 committed by Ulrich Drepper
parent 821ae7137b
commit e451d22b22
2 changed files with 21 additions and 11 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2011-04-07 Andreas Schwab <schwab@redhat.com>
* sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S (CALL_FAIL):
Maintain aligned stack.
(CHECK_RSP): Remove unused macro.
2011-04-03 Ulrich Drepper <drepper@gmail.com> 2011-04-03 Ulrich Drepper <drepper@gmail.com>
* sysdeps/x86_64/cacheinfo.c (intel_02_known): Fix typo in table. * sysdeps/x86_64/cacheinfo.c (intel_02_known): Fix typo in table.

26
sysdeps/unix/sysv/linux/x86_64/____longjmp_chk.S
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@ -1,4 +1,4 @@
/* Copyright (C) 2001,2004,2005,2006,2009,2010 Free Software Foundation, Inc. /* Copyright (C) 2001,2004,2005,2006,2009,2010,2011 Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or The GNU C Library is free software; you can redistribute it and/or
@ -30,19 +30,23 @@ longjmp_msg:
//#define __longjmp ____longjmp_chk //#define __longjmp ____longjmp_chk
#ifdef PIC #ifdef PIC
# define CALL_FAIL leaq longjmp_msg(%rip), %rdi; \ # define CALL_FAIL subq $8, %rsp; \
call __GI___fortify_fail cfi_remember_state; \
cfi_def_cfa_offset(16); \
leaq longjmp_msg(%rip), %rdi; \
call __GI___fortify_fail; \
nop; \
cfi_restore_state
#else #else
# define CALL_FAIL movq $longjmp_msg, %rdi; \ # define CALL_FAIL subq $8, %rsp; \
call __fortify_fail cfi_remember_state; \
cfi_def_cfa_offset(16); \
movq $longjmp_msg, %rdi; \
call __fortify_fail; \
nop; \
cfi_restore_state
#endif #endif
#define CHECK_RSP(reg) \
cmpq reg, %rsp; \
jbe .Lok; \
CALL_FAIL; \
.Lok:
/* Jump to the position specified by ENV, causing the /* Jump to the position specified by ENV, causing the
setjmp call there to return VAL, or 1 if VAL is 0. setjmp call there to return VAL, or 1 if VAL is 0.
void __longjmp (__jmp_buf env, int val). */ void __longjmp (__jmp_buf env, int val). */