x86, xsave: reorganization of signal save/restore fpstate code layout
move 64bit routines that saves/restores fpstate in/from user stack from
signal_64.c to xsave.c
restore_i387_xstate() now handles the condition when user passes
NULL fpstate.
Other misc changes for prepartion of xsave/xrstor sigcontext support.
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>
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index a05bf0f..c596eab 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -216,7 +216,7 @@
unsigned int *peax)
{
unsigned int tmpflags, gs, oldgs, err = 0;
- struct _fpstate_ia32 __user *buf;
+ void __user *buf;
u32 tmp;
/* Always make any pending restarted system calls return -EINTR */
@@ -260,26 +260,12 @@
err |= __get_user(tmp, &sc->fpstate);
buf = compat_ptr(tmp);
- if (buf) {
- if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
- goto badframe;
- err |= restore_i387_ia32(buf);
- } else {
- struct task_struct *me = current;
-
- if (used_math()) {
- clear_fpu(me);
- clear_used_math();
- }
- }
+ err |= restore_i387_xstate_ia32(buf);
err |= __get_user(tmp, &sc->ax);
*peax = tmp;
return err;
-
-badframe:
- return 1;
}
asmlinkage long sys32_sigreturn(struct pt_regs *regs)
@@ -351,7 +337,7 @@
*/
static int ia32_setup_sigcontext(struct sigcontext_ia32 __user *sc,
- struct _fpstate_ia32 __user *fpstate,
+ void __user *fpstate,
struct pt_regs *regs, unsigned int mask)
{
int tmp, err = 0;
@@ -382,7 +368,7 @@
err |= __put_user((u32)regs->flags, &sc->flags);
err |= __put_user((u32)regs->sp, &sc->sp_at_signal);
- tmp = save_i387_ia32(fpstate);
+ tmp = save_i387_xstate_ia32(fpstate);
if (tmp < 0)
err = -EFAULT;
else {
@@ -404,7 +390,7 @@
*/
static void __user *get_sigframe(struct k_sigaction *ka, struct pt_regs *regs,
size_t frame_size,
- struct _fpstate_ia32 **fpstate)
+ void **fpstate)
{
unsigned long sp;
@@ -441,7 +427,7 @@
struct sigframe __user *frame;
void __user *restorer;
int err = 0;
- struct _fpstate_ia32 __user *fpstate = NULL;
+ void __user *fpstate = NULL;
/* copy_to_user optimizes that into a single 8 byte store */
static const struct {
@@ -529,7 +515,7 @@
struct rt_sigframe __user *frame;
void __user *restorer;
int err = 0;
- struct _fpstate_ia32 __user *fpstate = NULL;
+ void __user *fpstate = NULL;
/* __copy_to_user optimizes that into a single 8 byte store */
static const struct {