diff options
| author | Brian Gerst <brgerst@gmail.com> | 2009-12-09 12:34:42 -0500 |
|---|---|---|
| committer | H. Peter Anvin <hpa@zytor.com> | 2009-12-10 15:55:36 -0800 |
| commit | e840227c141116171c89ab1abb5cc9fee6fdb488 (patch) | |
| tree | 786ac8591fc89272a6a118d2e1b4ad9b3e7eff32 | |
| parent | fa4b8f84383ae197e643a46c36bf58ab8dffc95c (diff) | |
x86, 32-bit: Use same regs as 64-bit for kernel_thread_helper
The arg should be in %eax, but that is clobbered by the return value
of clone. The function pointer can be in any register. Also, don't
push args onto the stack, since regparm(3) is the normal calling
convention now.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260380084-3707-4-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 8 | ||||
| -rw-r--r-- | arch/x86/kernel/process_32.c | 8 |
2 files changed, 6 insertions, 10 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index cb12b9bfc9c..44a8e0dc673 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1047,12 +1047,8 @@ END(spurious_interrupt_bug) ENTRY(kernel_thread_helper) pushl $0 # fake return address for unwinder CFI_STARTPROC - movl %edx,%eax - push %edx - CFI_ADJUST_CFA_OFFSET 4 - call *%ebx - push %eax - CFI_ADJUST_CFA_OFFSET 4 + movl %edi,%eax + call *%esi call do_exit ud2 # padding for call trace CFI_ENDPROC diff --git a/arch/x86/kernel/process_32.c b/arch/x86/kernel/process_32.c index 506d5a7ba17..bd874d2b6ab 100644 --- a/arch/x86/kernel/process_32.c +++ b/arch/x86/kernel/process_32.c @@ -193,8 +193,8 @@ void show_regs(struct pt_regs *regs) } /* - * This gets run with %bx containing the - * function to call, and %dx containing + * This gets run with %si containing the + * function to call, and %di containing * the "args". */ extern void kernel_thread_helper(void); @@ -208,8 +208,8 @@ int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags) memset(®s, 0, sizeof(regs)); - regs.bx = (unsigned long) fn; - regs.dx = (unsigned long) arg; + regs.si = (unsigned long) fn; + regs.di = (unsigned long) arg; regs.ds = __USER_DS; regs.es = __USER_DS; |