tree 3068f40bdee9b5bae16615b51275bdbf7b978d4a
parent 6f313b12335abf010802751c45249e7a0007a232
author Bodo Stroesser <[EMAIL PROTECTED]> Fri, 29 Jul 2005 11:16:06 -0700
committer Linus Torvalds <[EMAIL PROTECTED]> Fri, 29 Jul 2005 11:46:04 -0700
[PATCH] uml: Fix skas0 stub return
It's wrong to pop a fixed number of words from stack before calling sigreturn,
as the number depends on what code is generated by the compiler for the start
of stub_segv_handler(). What we need is esp containing the address of
sigcontext. So we explicitly load that pointer into esp.
Signed-off-by: Bodo Stroesser <[EMAIL PROTECTED]>
Signed-off-by: Jeff Dike <[EMAIL PROTECTED]>
Cc: Paolo 'Blaisorblade' Giarrusso <[EMAIL PROTECTED]>
Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]>
arch/um/sys-i386/stub_segv.c | 6 +++---
1 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/um/sys-i386/stub_segv.c b/arch/um/sys-i386/stub_segv.c
--- a/arch/um/sys-i386/stub_segv.c
+++ b/arch/um/sys-i386/stub_segv.c
@@ -21,10 +21,10 @@ stub_segv_handler(int sig)
__asm__("movl %0, %%eax ; int $0x80": : "g" (__NR_getpid));
__asm__("movl %%eax, %%ebx ; movl %0, %%eax ; movl %1, %%ecx ;"
"int $0x80": : "g" (__NR_kill), "g" (SIGUSR1));
- /* Pop the frame pointer and return address since we need to leave
+ /* Load pointer to sigcontext into esp, since we need to leave
* the stack in its original form when we do the sigreturn here, by
* hand.
*/
- __asm__("popl %%eax ; popl %%eax ; popl %%eax ; movl %0, %%eax ; "
- "int $0x80" : : "g" (__NR_sigreturn));
+ __asm__("mov %0,%%esp ; movl %1, %%eax ; "
+ "int $0x80" : : "a" (sc), "g" (__NR_sigreturn));
}
-
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