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authorSeiji Aguchi <seiji.aguchi@hds.com>2013-10-30 20:37:00 (GMT)
committerH. Peter Anvin <hpa@linux.intel.com>2013-11-08 22:15:45 (GMT)
commit25c74b10bacead867478480170083f69cfc0db48 (patch)
tree750066787398c55825485341988e19af9776b562 /arch/x86/mm
parent959c071f0974cda7702d7574647de7ad9259eb57 (diff)
x86, trace: Register exception handler to trace IDT
This patch registers exception handlers for tracing to a trace IDT. To implemented it in set_intr_gate(), this patch does followings. - Register the exception handlers to the trace IDT by prepending "trace_" to the handler's names. - Also, newly introduce trace_page_fault() to add tracepoints in a subsequent patch. Signed-off-by: Seiji Aguchi <seiji.aguchi@hds.com> Link: http://lkml.kernel.org/r/52716DEC.5050204@hds.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/fault.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c
index 3aaeffc..fd3e281 100644
--- a/arch/x86/mm/fault.c
+++ b/arch/x86/mm/fault.c
@@ -1231,3 +1231,13 @@ do_page_fault(struct pt_regs *regs, unsigned long error_code)
__do_page_fault(regs, error_code);
exception_exit(prev_state);
}
+
+dotraplinkage void __kprobes
+trace_do_page_fault(struct pt_regs *regs, unsigned long error_code)
+{
+ enum ctx_state prev_state;
+
+ prev_state = exception_enter();
+ __do_page_fault(regs, error_code);
+ exception_exit(prev_state);
+}

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