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| author | Linus Torvalds | 2013-11-14 08:25:10 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2013-11-14 08:25:10 +0100 |
| commit | 7971e23a66c94f1b9bd2d64a3e86dfbfa8c60121 (patch) | |
| tree | 20ff577e437ac6c361335151ce6b4c59bc72de02 /arch/x86/kernel/entry_32.S | |
| parent | Merge tag 'fbdev-3.13' of git://git.kernel.org/pub/scm/linux/kernel/git/tomba... (diff) | |
| parent | x86, trace: Change user|kernel_page_fault to page_fault_user|kernel (diff) | |
| download | kernel-qcow2-linux-7971e23a66c94f1b9bd2d64a3e86dfbfa8c60121.tar.gz kernel-qcow2-linux-7971e23a66c94f1b9bd2d64a3e86dfbfa8c60121.tar.xz kernel-qcow2-linux-7971e23a66c94f1b9bd2d64a3e86dfbfa8c60121.zip | |
Merge branch 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86/trace changes from Ingo Molnar:
"This adds page fault tracepoints which have zero runtime cost in the
disabled case via IDT trickery (no NOPs in the page fault hotpath)"
* 'x86-trace-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86, trace: Change user|kernel_page_fault to page_fault_user|kernel
x86, trace: Add page fault tracepoints
x86, trace: Delete __trace_alloc_intr_gate()
x86, trace: Register exception handler to trace IDT
x86, trace: Remove __alloc_intr_gate()
Diffstat (limited to 'arch/x86/kernel/entry_32.S')
| -rw-r--r-- | arch/x86/kernel/entry_32.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S index fd1bc1b15e6d..51e2988c5728 100644 --- a/arch/x86/kernel/entry_32.S +++ b/arch/x86/kernel/entry_32.S @@ -1244,6 +1244,16 @@ return_to_handler: */ .pushsection .kprobes.text, "ax" +#ifdef CONFIG_TRACING +ENTRY(trace_page_fault) + RING0_EC_FRAME + ASM_CLAC + pushl_cfi $trace_do_page_fault + jmp error_code + CFI_ENDPROC +END(trace_page_fault) +#endif + ENTRY(page_fault) RING0_EC_FRAME ASM_CLAC |