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| author | Andi Kleen <ak@suse.de> | 2006-09-26 10:52:35 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2006-09-26 10:52:35 +0200 |
| commit | 02ba1a32dbd3d406530a17a2643a8f0f8cbf3acc (patch) | |
| tree | 34264fe17596eb3c83e485c26094d246e8841dac | |
| parent | 3d08a256da8aed5300bd0752200ece426f49b050 (diff) | |
| download | linux-02ba1a32dbd3d406530a17a2643a8f0f8cbf3acc.tar.gz linux-02ba1a32dbd3d406530a17a2643a8f0f8cbf3acc.tar.bz2 linux-02ba1a32dbd3d406530a17a2643a8f0f8cbf3acc.zip | |
[PATCH] i386: move kernel_thread_helper into entry.S
And add proper CFI annotation to it which was previously
impossible. This prevents "stuck" messages by the dwarf2 unwinder
when reaching the top of a kernel stack.
Includes feedback from Jan Beulich
Cc: jbeulich@novell.com
Signed-off-by: Andi Kleen <ak@suse.de>
| -rw-r--r-- | arch/i386/kernel/entry.S | 13 | ||||
| -rw-r--r-- | arch/i386/kernel/process.c | 9 |
2 files changed, 13 insertions, 9 deletions
diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S index ba22ec8fab54..dede506e5bd0 100644 --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -950,6 +950,19 @@ ENTRY(arch_unwind_init_running) ENDPROC(arch_unwind_init_running) #endif +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 + call do_exit + CFI_ENDPROC +ENDPROC(kernel_thread_helper) + .section .rodata,"a" #include "syscall_table.S" diff --git a/arch/i386/kernel/process.c b/arch/i386/kernel/process.c index b741c3e1a5eb..220aeca59c3a 100644 --- a/arch/i386/kernel/process.c +++ b/arch/i386/kernel/process.c @@ -321,15 +321,6 @@ void show_regs(struct pt_regs * regs) * the "args". */ extern void kernel_thread_helper(void); -__asm__(".section .text\n" - ".align 4\n" - "kernel_thread_helper:\n\t" - "movl %edx,%eax\n\t" - "pushl %edx\n\t" - "call *%ebx\n\t" - "pushl %eax\n\t" - "call do_exit\n" - ".previous"); /* * Create a kernel thread |