aboutsummaryrefslogtreecommitdiff
path: root/arch/powerpc/kernel/signal_64.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel/signal_64.c')
-rw-r--r--arch/powerpc/kernel/signal_64.c31
1 files changed, 30 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index a587b33cd6b..34f37e59bac 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -123,6 +123,22 @@ static long setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
buf[i] = current->thread.TS_FPR(i);
memcpy(&buf[i], &current->thread.fpscr, sizeof(double));
err |= __copy_to_user(&sc->fp_regs, buf, FP_REGS_SIZE);
+ /*
+ * Copy VSX low doubleword to local buffer for formatting,
+ * then out to userspace. Update v_regs to point after the
+ * VMX data.
+ */
+ if (current->thread.used_vsr) {
+ flush_vsx_to_thread(current);
+ v_regs += ELF_NVRREG;
+ for (i = 0; i < 32 ; i++)
+ buf[i] = current->thread.fpr[i][TS_VSRLOWOFFSET];
+ err |= __copy_to_user(v_regs, buf, 32 * sizeof(double));
+ /* set MSR_VSX in the MSR value in the frame to
+ * indicate that sc->vs_reg) contains valid data.
+ */
+ msr |= MSR_VSX;
+ }
#else /* CONFIG_VSX */
/* copy fpr regs and fpscr */
err |= __copy_to_user(&sc->fp_regs, &current->thread.fpr, FP_REGS_SIZE);
@@ -197,7 +213,7 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
* This has to be done before copying stuff into current->thread.fpr/vr
* for the reasons explained in the previous comment.
*/
- regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC);
+ regs->msr &= ~(MSR_FP | MSR_FE0 | MSR_FE1 | MSR_VEC | MSR_VSX);
#ifdef CONFIG_ALTIVEC
err |= __get_user(v_regs, &sc->v_regs);
@@ -226,6 +242,19 @@ static long restore_sigcontext(struct pt_regs *regs, sigset_t *set, int sig,
current->thread.TS_FPR(i) = buf[i];
memcpy(&current->thread.fpscr, &buf[i], sizeof(double));
+ /*
+ * Get additional VSX data. Update v_regs to point after the
+ * VMX data. Copy VSX low doubleword from userspace to local
+ * buffer for formatting, then into the taskstruct.
+ */
+ v_regs += ELF_NVRREG;
+ if ((msr & MSR_VSX) != 0)
+ err |= __copy_from_user(buf, v_regs, 32 * sizeof(double));
+ else
+ memset(buf, 0, 32 * sizeof(double));
+
+ for (i = 0; i < 32 ; i++)
+ current->thread.fpr[i][TS_VSRLOWOFFSET] = buf[i];
#else
err |= __copy_from_user(&current->thread.fpr, &sc->fp_regs, FP_REGS_SIZE);
#endif