- change pte_spill_X() to take an extra parameter to determine if

  the fault is a EXE fault or R/W fault.

- mask/or the SR_NOEXEC bit into the segment register value
  when the number of executable pages becomes 0/non-zero.

- create segments with SR_NOEXEC set, will be cleared when first
  exec mapping in the segment is created.

- allow pte_spill_X() to deal with a new type of fault, page mapped
  but non executable, when execute was requested.

Adds up to - non-exec stack support for powerpc.

1 files changed, 3 insertions, 1 deletions

diff --git a/sys/arch/macppc/macppc/locore.S b/sys/arch/macppc/macppc/locore.S
index 83e92875bae..50433e85933 100644
--- a/sys/arch/macppc/macppc/locore.S
+++ b/sys/arch/macppc/macppc/locore.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: locore.S,v 1.3 2002/03/21 03:02:32 drahn Exp $	*/
+/*	$OpenBSD: locore.S,v 1.4 2002/07/24 02:19:28 drahn Exp $	*/
 /*	$NetBSD: locore.S,v 1.2 1996/10/16 19:33:09 ws Exp $	*/
 
 /*
@@ -981,6 +981,7 @@ s_dsitrap:
 	mfdar	3
 	mfsrr1  4
 	mfdsisr	5
+	li	6, 0
 s_pte_spill:
 	bl	_C_LABEL(pte_spill_r)		/* try a spill */
 	cmpwi	0,3,0
@@ -1035,6 +1036,7 @@ s_isitrap:
 	mfsrr0	3
 	mfsrr1  4
 	li	5, 0
+	li	6, 1
 	b	s_pte_spill		/* above */
 
 /*