Place a cpu-dependent trap/illegal instruction over the remainder of the

sigtramp page, so that it will generate a nice kernel fault if touched.
While here, move most of the sigtramps to the .rodata segment, because
they are not executed in the kernel.
Also some preparation for sliding the actual sigtramp forward (will need
some gdb changes)
ok mlarkin kettenis

1 files changed, 20 insertions, 2 deletions

diff --git a/sys/arch/hppa/hppa/locore.S b/sys/arch/hppa/hppa/locore.S
index 037e3b8e72a..785da2d1daf 100644
--- a/sys/arch/hppa/hppa/locore.S
+++ b/sys/arch/hppa/hppa/locore.S
@@ -1,4 +1,4 @@
-/*	$OpenBSD: locore.S,v 1.194 2016/05/10 18:39:44 deraadt Exp $	*/
+/*	$OpenBSD: locore.S,v 1.195 2016/05/23 20:11:49 deraadt Exp $	*/
 
 /*
  * Copyright (c) 1998-2004 Michael Shalayeff
@@ -3027,7 +3027,14 @@ EXIT(hw_cpu_spinup_trampoline)
 /*
  * Signal "trampoline" code. Invoked from RTE setup by sendsig().
  */
-ENTRY(sigcode,0)
+	.section .rodata
+	.align 4
+	.export	sigcode, entry
+	.label sigcode
+	.proc
+	.callinfo frame=0,calls, save_rp, save_sp
+	.entry
+sigcode:
 	bb,>=,n	arg3, 30, sigcode_call
 	dep	r0, 31, 2, arg3
 	ldw	4(arg3), r19
@@ -3053,4 +3060,15 @@ sigcoderet:
 ALTENTRY(esigcode)
 EXIT(sigcode)
 
+	.globl	sigfill
+sigfill:
+	break	0,0
+esigfill:
+	.align	4
+	.globl	sigfillsiz
+sigfillsiz:
+	.word	esigfill - sigfill
+
+	.text
+
 	.end