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authorDave Hansen <dave.hansen@linux.intel.com>2015-06-07 11:37:03 -0700
committerIngo Molnar <mingo@kernel.org>2015-06-09 12:24:31 +0200
commite7126cf5f10aef1555cb99eddb7efff41bdf9566 (patch)
treefc24752c5b4a2202483c8e594d5c37ec948b9538 /arch/x86/mm
parent8c3641e957a948f41f0174290096ed7a3b95e703 (diff)
downloadlinux-e7126cf5f10aef1555cb99eddb7efff41bdf9566.tar.bz2
x86/mpx: Trace #BR exceptions
This is the first in a series of MPX tracing patches. I've found these extremely useful in the process of debugging applications and the kernel code itself. This exception hooks in to the bounds (#BR) exception very early and allows capturing the key registers which would influence how the exception is handled. Note that bndcfgu/bndstatus are technically still 64-bit registers even in 32-bit mode. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Dave Hansen <dave@sr71.net> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20150607183703.5FE2619A@viggo.jf.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/mpx.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/mm/mpx.c b/arch/x86/mm/mpx.c
index d6e02f3adee0..1fef52c17fc8 100644
--- a/arch/x86/mm/mpx.c
+++ b/arch/x86/mm/mpx.c
@@ -17,6 +17,9 @@
#include <asm/processor.h>
#include <asm/fpu/internal.h>
+#define CREATE_TRACE_POINTS
+#include <asm/trace/mpx.h>
+
static const char *mpx_mapping_name(struct vm_area_struct *vma)
{
return "[mpx]";