Execution of Altivec instructions will crash the kernel.
Apply by doing:
cd /usr/src
patch -p0 < 005_altivec.patch
And then rebuild your kernel.
Index: sys/arch/macppc/macppc/machdep.c
===================================================================
RCS file: /cvs/src/sys/arch/macppc/macppc/machdep.c,v
retrieving revision 1.9
retrieving revision 1.10
diff -u -r1.9 -r1.10
--- sys/arch/macppc/macppc/machdep.c 2001/09/28 04:13:12 1.9
+++ sys/arch/macppc/macppc/machdep.c 2001/11/05 22:26:57 1.10
@@ -264,7 +264,7 @@
/*
* Set up trap vectors
*/
- for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100)
+ for (exc = EXC_RSVD; exc <= EXC_LAST; exc += 0x100) {
switch (exc) {
default:
bcopy(&trapcode, (void *)exc, (size_t)&trapsize);
@@ -309,6 +309,17 @@
#endif
break;
}
+ }
+
+ /* Grr, ALTIVEC_UNAVAIL is a vector not ~0xff aligned: 0x0f20 */
+ bcopy(&trapcode, (void *)0xf20, (size_t)&trapsize);
+ /*
+ * since trapsize is > 0x20, we just overwrote the EXC_PERF handler
+ * since we do not use it, we will "share" it with the EXC_VEC,
+ * we dont support EXC_VEC either.
+ * should be a 'ba 0xf20 written' at address 0xf00, but we
+ * do not generate EXC_PERF exceptions...
+ */
}
+ /* This is not really a perf exception, but is an ALTIVEC unavail
+ * which we do not handle, kill the process with illegal instruction.
+ */
+ case EXC_PERF|EXC_USER:
+ sv.sival_int = frame->srr0;
+ trapsignal(p, SIGILL, 0, ILL_ILLOPC, sv);
+ break;
+
case EXC_AST|EXC_USER:
/* This is just here that we trap */
break;
