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author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 17:29:26 (GMT) |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 17:49:28 (GMT) |
commit | 42deec6f2c3688fdaf986225ac901b817cd91568 (patch) | |
tree | 2aba616a46b3fd4568705bdce6384883e6007c8c /arch/x86/kernel/i387.c | |
parent | c37b5efea43f9e500363f9973dd00e3d2cdcc685 (diff) | |
download | linux-fsl-qoriq-42deec6f2c3688fdaf986225ac901b817cd91568.tar.xz |
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 <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/i387.c')
-rw-r--r-- | arch/x86/kernel/i387.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/x86/kernel/i387.c b/arch/x86/kernel/i387.c index cbb9dc4..e0ed59f 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; } |