diff options
| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 10:29:25 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 19:49:27 +0200 |
| commit | c37b5efea43f9e500363f9973dd00e3d2cdcc685 (patch) | |
| tree | 9ce635f1672099dafcd78e535b4ea18d80235d8f /include/asm-x86/i387.h | |
| parent | bdd8caba5ed5bb7ee21c9f061597284ffeb280bf (diff) | |
| download | blackbird-op-linux-c37b5efea43f9e500363f9973dd00e3d2cdcc685.tar.gz blackbird-op-linux-c37b5efea43f9e500363f9973dd00e3d2cdcc685.zip | |
x86, xsave: save/restore the extended state context in sigframe
On cpu's supporting xsave/xrstor, fpstate pointer in the sigcontext, will
include the extended state information along with fpstate information. Presence
of extended state information is indicated by the presence
of FP_XSTATE_MAGIC1 at fpstate.sw_reserved.magic1 and FP_XSTATE_MAGIC2
at fpstate + (fpstate.sw_reserved.extended_size - FP_XSTATE_MAGIC2_SIZE).
Extended feature bit mask that is saved in the memory layout is represented
by the fpstate.sw_reserved.xstate_bv
For RT signal frames, UC_FP_XSTATE in the uc_flags also indicate the
presence of extended state information in the sigcontext's fpstate
pointer.
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 'include/asm-x86/i387.h')
| -rw-r--r-- | include/asm-x86/i387.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/asm-x86/i387.h b/include/asm-x86/i387.h index dc3745e8040a..d3dda7161954 100644 --- a/include/asm-x86/i387.h +++ b/include/asm-x86/i387.h @@ -31,8 +31,10 @@ extern user_regset_active_fn fpregs_active, xfpregs_active; extern user_regset_get_fn fpregs_get, xfpregs_get, fpregs_soft_get; extern user_regset_set_fn fpregs_set, xfpregs_set, fpregs_soft_set; +extern struct _fpx_sw_bytes fx_sw_reserved; #ifdef CONFIG_IA32_EMULATION extern unsigned int sig_xstate_ia32_size; +extern struct _fpx_sw_bytes fx_sw_reserved_ia32; struct _fpstate_ia32; struct _xstate_ia32; extern int save_i387_xstate_ia32(void __user *buf); @@ -104,7 +106,7 @@ static inline void clear_fpu_state(struct task_struct *tsk) X86_FEATURE_FXSAVE_LEAK); } -static inline int save_i387_checking(struct i387_fxsave_struct __user *fx) +static inline int fxsave_user(struct i387_fxsave_struct __user *fx) { int err; |
