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-rw-r--r--arch/arm/kernel/signal.c55
1 files changed, 4 insertions, 51 deletions
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 7cb532fc8aa..d68d1b69468 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -180,44 +180,23 @@ static int restore_iwmmxt_context(struct iwmmxt_sigframe *frame)
static int preserve_vfp_context(struct vfp_sigframe __user *frame)
{
- struct thread_info *thread = current_thread_info();
- struct vfp_hard_struct *h = &thread->vfpstate.hard;
const unsigned long magic = VFP_MAGIC;
const unsigned long size = VFP_STORAGE_SIZE;
int err = 0;
- vfp_sync_hwstate(thread);
__put_user_error(magic, &frame->magic, err);
__put_user_error(size, &frame->size, err);
- /*
- * Copy the floating point registers. There can be unused
- * registers see asm/hwcap.h for details.
- */
- err |= __copy_to_user(&frame->ufp.fpregs, &h->fpregs,
- sizeof(h->fpregs));
- /*
- * Copy the status and control register.
- */
- __put_user_error(h->fpscr, &frame->ufp.fpscr, err);
-
- /*
- * Copy the exception registers.
- */
- __put_user_error(h->fpexc, &frame->ufp_exc.fpexc, err);
- __put_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
- __put_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
+ if (err)
+ return -EFAULT;
- return err ? -EFAULT : 0;
+ return vfp_preserve_user_clear_hwstate(&frame->ufp, &frame->ufp_exc);
}
static int restore_vfp_context(struct vfp_sigframe __user *frame)
{
- struct thread_info *thread = current_thread_info();
- struct vfp_hard_struct *h = &thread->vfpstate.hard;
unsigned long magic;
unsigned long size;
- unsigned long fpexc;
int err = 0;
__get_user_error(magic, &frame->magic, err);
@@ -228,33 +207,7 @@ static int restore_vfp_context(struct vfp_sigframe __user *frame)
if (magic != VFP_MAGIC || size != VFP_STORAGE_SIZE)
return -EINVAL;
- vfp_flush_hwstate(thread);
-
- /*
- * Copy the floating point registers. There can be unused
- * registers see asm/hwcap.h for details.
- */
- err |= __copy_from_user(&h->fpregs, &frame->ufp.fpregs,
- sizeof(h->fpregs));
- /*
- * Copy the status and control register.
- */
- __get_user_error(h->fpscr, &frame->ufp.fpscr, err);
-
- /*
- * Sanitise and restore the exception registers.
- */
- __get_user_error(fpexc, &frame->ufp_exc.fpexc, err);
- /* Ensure the VFP is enabled. */
- fpexc |= FPEXC_EN;
- /* Ensure FPINST2 is invalid and the exception flag is cleared. */
- fpexc &= ~(FPEXC_EX | FPEXC_FP2V);
- h->fpexc = fpexc;
-
- __get_user_error(h->fpinst, &frame->ufp_exc.fpinst, err);
- __get_user_error(h->fpinst2, &frame->ufp_exc.fpinst2, err);
-
- return err ? -EFAULT : 0;
+ return vfp_restore_user_hwstate(&frame->ufp, &frame->ufp_exc);
}
#endif