Index: head/sys/powerpc/powerpc/machdep.c
===================================================================
--- head/sys/powerpc/powerpc/machdep.c
+++ head/sys/powerpc/powerpc/machdep.c
@@ -530,6 +530,10 @@
 	saved_sprno = sprno = (intptr_t) addr;
 	sprno = ((sprno & 0x3e0) >> 5) | ((sprno & 0x1f) << 5);
 	p = (uint32_t *)(void *)&get_spr;
+#if defined(_CALL_ELF) && _CALL_ELF == 2
+	/* Account for ELFv2 function prologue. */
+	p += 2;
+#endif
 	*p = (*p & ~0x001ff800) | (sprno << 11);
 	__syncicache(get_spr, cacheline_size);
 	spr = get_spr(sprno);