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Preserve stack alignment in i386 makecontext.

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This commit is contained in:
Ulrich Drepper 2009-07-23 08:02:07 -07:00
parent c15b1d20cd
commit 9b6bf8a302
2 changed files with 7 additions and 6 deletions
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ChangeLog
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@ -1,5 +1,8 @@
2009-07-23 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/i386/makecontext.S: Ensure we preserve the
stack alignment in the exit code.
* elf/dl-lookup.c (dl_lookup_x): The hashval for unique symbol can
potentially be zero.

10
sysdeps/unix/sysv/linux/i386/makecontext.S
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@ -1,5 +1,5 @@
/* Create new context.
Copyright (C) 2001, 2002, 2005, 2007, 2008 Free Software Foundation, Inc.
Copyright (C) 2001,2002,2005,2007,2008,2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
@ -105,17 +105,15 @@ L(exitcode):
1: popl %ebx
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
#endif
popl %eax /* This is the next context. */
testl %eax, %eax
cmpl $0, (%esp) /* Check the next context. */
je 2f /* If it is zero exit. */
pushl %eax
call JUMPTARGET(__setcontext)
/* If this returns (which can happen if the syscall fails) we'll
exit the program with the return error value (-1). */
2: pushl %eax
call HIDDEN_JUMPTARGET(exit)
movl %eax, (%esp)
2: call HIDDEN_JUMPTARGET(exit)
/* The 'exit' call should never return. In case it does cause
the process to terminate. */
hlt