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x86: split ret_from_fork

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-09-10 16:44:54 -04:00
parent 44f4b56b54
commit 7076aada10
7 changed files with 68 additions and 86 deletions
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15
arch/x86/kernel/entry_32.S
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@@ -994,15 +994,20 @@ END(spurious_interrupt_bug)
*/
.popsection
ENTRY(kernel_thread_helper)
pushl $0 # fake return address for unwinder
ENTRY(ret_from_kernel_thread)
CFI_STARTPROC
movl %edi,%eax
call *%esi
pushl_cfi %eax
call schedule_tail
GET_THREAD_INFO(%ebp)
popl_cfi %eax
pushl_cfi $0x0202 # Reset kernel eflags
popfl_cfi
movl PT_EBP(%esp),%eax
call *PT_EBX(%esp)
call do_exit
ud2 # padding for call trace
CFI_ENDPROC
ENDPROC(kernel_thread_helper)
ENDPROC(ret_from_kernel_thread)
#ifdef CONFIG_XEN
/* Xen doesn't set %esp to be precisely what the normal sysenter