From 91c3dba7dbc199191272f4a9863f86ea3bfd679f Mon Sep 17 00:00:00 2001 From: Yu-cheng Yu Date: Fri, 17 Jun 2016 13:07:17 -0700 Subject: x86/fpu/xstate: Fix PTRACE frames for XSAVES XSAVES uses compacted format and is a kernel instruction. The kernel should use standard-format, non-supervisor state data for PTRACE. Signed-off-by: Yu-cheng Yu [ Edited away artificial linebreaks. ] Reviewed-by: Dave Hansen Cc: Andy Lutomirski Cc: Borislav Petkov Cc: Brian Gerst Cc: Dave Hansen Cc: Denys Vlasenko Cc: Fenghua Yu Cc: H. Peter Anvin Cc: Josh Poimboeuf Cc: Linus Torvalds Cc: Oleg Nesterov Cc: Peter Zijlstra Cc: Quentin Casasnovas Cc: Ravi V. Shankar Cc: Sai Praneeth Prakhya Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/de3d80949001305fe389799973b675cab055c457.1466179491.git.yu-cheng.yu@intel.com [ Made various readability edits. ] Signed-off-by: Ingo Molnar --- arch/x86/include/asm/fpu/xstate.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'arch/x86/include/asm/fpu/xstate.h') diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h index 92f376ccc999..ae55a43e09c0 100644 --- a/arch/x86/include/asm/fpu/xstate.h +++ b/arch/x86/include/asm/fpu/xstate.h @@ -51,5 +51,8 @@ void fpu__xstate_clear_all_cpu_caps(void); void *get_xsave_addr(struct xregs_state *xsave, int xstate); const void *get_xsave_field_ptr(int xstate_field); int using_compacted_format(void); - +int copyout_from_xsaves(unsigned int pos, unsigned int count, void *kbuf, + void __user *ubuf, struct xregs_state *xsave); +int copyin_to_xsaves(const void *kbuf, const void __user *ubuf, + struct xregs_state *xsave); #endif -- cgit v1.2.3