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[BZ #5435]

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* sysdeps/unix/sysv/linux/i386/makecontext.S: Align stack.
This commit is contained in:
Ulrich Drepper 2007-12-03 04:57:30 +00:00
parent d90d025691
commit 51bd20d93a
2 changed files with 14 additions and 5 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2007-12-03 Ulrich Drepper <drepper@redhat.com>
[BZ #5435]
* sysdeps/unix/sysv/linux/i386/makecontext.S: Align stack.
* stdlib/tst-setcontext.c: Catch the case where the links gets
messed up and we do not reach main again.

16
sysdeps/unix/sysv/linux/i386/makecontext.S
View File

@ -35,11 +35,6 @@ ENTRY(__makecontext)
movl %ecx, oEIP(%eax)
addl oSS_SIZE(%eax), %edx
/* Put the next context on the new stack (from the uc_link
element). */
movl oLINK(%eax), %ecx
movl %ecx, -4(%edx)
/* Remember the number of parameters for the exit handler since
it has to remove them. We store the number in the EBX register
which the function we will call must preserve. */
@ -50,9 +45,20 @@ ENTRY(__makecontext)
negl %ecx
leal -8(%edx,%ecx,4), %edx
negl %ecx
/* Align the stack. */
addl $16, %edx
andl $0xfffffff0, %edx
subl $4, %edx
/* Store the future stack pointer. */
movl %edx, oESP(%eax)
/* Put the next context on the new stack (from the uc_link
element). */
movl oLINK(%eax), %eax
movl %eax, 4(%edx,%ecx,4)
/* Copy all the parameters. */
jecxz 2f
1: movl 12(%esp,%ecx,4), %eax