On Wed, 22 Jan 2014, Qiaowei Ren wrote: > Changes since v1: > * check to see if #BR occurred in userspace or kernel space. > * use generic structure and macro as much as possible when > decode mpx instructions. > > Qiaowei Ren (4): > x86, mpx: add documentation on Intel MPX > x86, mpx: hook #BR exception handler to allocate bound tables > x86, mpx: add prctl commands PR_MPX_INIT, PR_MPX_RELEASE > x86, mpx: extend siginfo structure to include bound violation > information > > Documentation/x86/intel_mpx.txt | 76 +++++++ > arch/x86/Kconfig | 4 + > arch/x86/include/asm/mpx.h | 63 ++++++ > arch/x86/include/asm/processor.h | 16 ++ > arch/x86/kernel/Makefile | 1 + > arch/x86/kernel/mpx.c | 417 > ++++++++++++++++++++++++++++++++++++ > arch/x86/kernel/traps.c | 61 +++++- > include/uapi/asm-generic/siginfo.h | 9 +- > include/uapi/linux/prctl.h | 6 + > kernel/signal.c | 4 + > kernel/sys.c | 12 + > 11 files changed, 667 insertions(+), 2 deletions(-) > create mode 100644 Documentation/x86/intel_mpx.txt > create mode 100644 arch/x86/include/asm/mpx.h > create mode 100644 arch/x86/kernel/mpx.c >
There's compiler warnings spread amongst the various patches with x86_64 defconfig: arch/x86/kernel/mpx.c: In function ‘do_mpx_bounds’: arch/x86/kernel/mpx.c:415:2: warning: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 3 has type ‘void *’ [-Wformat] arch/x86/kernel/mpx.c:415:2: warning: format ‘%lx’ expects argument of type ‘long unsigned int’, but argument 4 has type ‘void *’ [-Wformat] arch/x86/kernel/mpx.c: In function ‘do_mpx_bt_fault’: arch/x86/kernel/mpx.c:373:5: warning: ‘old_val’ may be used uninitialized in this function [-Wuninitialized] arch/x86/kernel/mpx.c:360:25: note: ‘old_val’ was declared here and I had to resolve the second patch manually because of "x86/traps: Clean up error exception handler definitions" in the x86 tree. With 32-bit, we get casting warnings: arch/x86/kernel/mpx.c: In function ‘do_mpx_bounds’: arch/x86/kernel/mpx.c:407:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] arch/x86/kernel/mpx.c:409:3: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] and I'm pretty sure you want this to be available for such a config. There's also whitespace in the fourth patch.
