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| author | Dave Hansen <dave.hansen@linux.intel.com> | 2015-06-07 11:37:03 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-09 12:24:31 +0200 |
| commit | e7126cf5f10aef1555cb99eddb7efff41bdf9566 (patch) | |
| tree | fc24752c5b4a2202483c8e594d5c37ec948b9538 /arch/x86/mm/mpx.c | |
| parent | 8c3641e957a948f41f0174290096ed7a3b95e703 (diff) | |
| download | linux-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/mpx.c')
| -rw-r--r-- | arch/x86/mm/mpx.c | 3 |
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]"; |