D60754.diff
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	diff --git a/sys/powerpc/powerpc/exec_machdep.c b/sys/powerpc/powerpc/exec_machdep.c
	--- a/sys/powerpc/powerpc/exec_machdep.c
	+++ b/sys/powerpc/powerpc/exec_machdep.c
	@@ -422,13 +422,21 @@
	for (i = 0; i < 32; i++)
	memcpy(&mcp->mc_fpreg[i], &pcb->pcb_fpu.fpr[i].fpr,
	sizeof(double));
	- }

	- if (pcb->pcb_flags & PCB_VSX) {
	- mcp->mc_flags \|= _MC_VS_VALID;
	- for (i = 0; i < 32; i++)
	- memcpy(&mcp->mc_vsxfpreg[i],
	- &pcb->pcb_fpu.fpr[i].vsr[2], sizeof(double));
	+ /*
	+ * The second halves of VSR0-31 in the PCB are current
	+ * whenever the FP state is: VSX instructions cannot run
	+ * without PCB_VSX, and save_fpu() stores them when it is
	+ * set. Export them regardless of whether the thread owns
	+ * VSX at this moment, or a signal delivered right after a
	+ * sigreturn loses them.
	+ */
	+ if (cpu_features & PPC_FEATURE_HAS_VSX) {
	+ mcp->mc_flags \|= _MC_VS_VALID;
	+ for (i = 0; i < 32; i++)
	+ memcpy(&mcp->mc_vsxfpreg[i],
	+ &pcb->pcb_fpu.fpr[i].vsr[2], sizeof(double));
	+ }
	}

	/*