From 42deec6f2c3688fdaf986225ac901b817cd91568 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Tue, 29 Jul 2008 10:29:26 -0700 Subject: x86, xsave: update xsave header bits during ptrace fpregs set FP/SSE bits may be zero in the xsave header(representing the init state). Update these bits during the ptrace fpregs set operation, to indicate the non-init state. Signed-off-by: Suresh Siddha Signed-off-by: H. Peter Anvin Signed-off-by: Ingo Molnar --- arch/x86/kernel/i387.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index cbb9dc474a21..e0ed59f5c19f 100644 --- a/arch/x86/kernel/i387.c +++ b/arch/x86/kernel/i387.c @@ -214,6 +214,13 @@ int xfpregs_set(struct task_struct *target, const struct user_regset *regset, */ target->thread.xstate->fxsave.mxcsr &= mxcsr_feature_mask; + /* + * update the header bits in the xsave header, indicating the + * presence of FP and SSE state. + */ + if (cpu_has_xsave) + target->thread.xstate->xsave.xsave_hdr.xstate_bv |= XSTATE_FPSSE; + return ret; } @@ -414,6 +421,12 @@ int fpregs_set(struct task_struct *target, const struct user_regset *regset, if (!ret) convert_to_fxsr(target, &env); + /* + * update the header bit in the xsave header, indicating the + * presence of FP. + */ + if (cpu_has_xsave) + target->thread.xstate->xsave.xsave_hdr.xstate_bv |= XSTATE_FP; return ret; } -- cgit v1.2.3