From: guenther <guenther@openbsd.org>
Date: Mon, 31 Jul 2023 01:33:57 +0000 (+0000)
Subject: The replacement code passed to codepatch_replace() can usefully be
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=183b7dd1109a83aabbd0498cbaf8d93d385757f7;p=openbsd

The replacement code passed to codepatch_replace() can usefully be
const.

suggested by bluhm@
---

diff --git a/sys/arch/amd64/amd64/codepatch.c b/sys/arch/amd64/amd64/codepatch.c
index ec32b44119c..1ed1dd993e2 100644
--- a/sys/arch/amd64/amd64/codepatch.c
+++ b/sys/arch/amd64/amd64/codepatch.c
@@ -1,4 +1,4 @@
-/*      $OpenBSD: codepatch.c,v 1.9 2020/09/11 09:27:09 mpi Exp $    */
+/*      $OpenBSD: codepatch.c,v 1.10 2023/07/31 01:33:57 guenther Exp $    */
 /*
  * Copyright (c) 2014-2015 Stefan Fritsch <sf@sfritsch.de>
  *
@@ -126,7 +126,7 @@ codepatch_nop(uint16_t tag)
 
 /* Patch with alternative code */
 void
-codepatch_replace(uint16_t tag, void *code, size_t len)
+codepatch_replace(uint16_t tag, const void *code, size_t len)
 {
 	struct codepatch *patch;
 	unsigned char *rwaddr;
diff --git a/sys/arch/amd64/include/codepatch.h b/sys/arch/amd64/include/codepatch.h
index 71fe9475710..6401dab9f2f 100644
--- a/sys/arch/amd64/include/codepatch.h
+++ b/sys/arch/amd64/include/codepatch.h
@@ -1,4 +1,4 @@
-/*      $OpenBSD: codepatch.h,v 1.16 2023/07/28 06:18:35 guenther Exp $    */
+/*      $OpenBSD: codepatch.h,v 1.17 2023/07/31 01:33:57 guenther Exp $    */
 /*
  * Copyright (c) 2014-2015 Stefan Fritsch <sf@sfritsch.de>
  *
@@ -29,7 +29,7 @@ __cptext void *codepatch_maprw(vaddr_t *nva, vaddr_t dest);
 __cptext void codepatch_unmaprw(vaddr_t nva);
 __cptext void codepatch_fill_nop(void *caddr, uint16_t len);
 __cptext void codepatch_nop(uint16_t tag);
-__cptext void codepatch_replace(uint16_t tag, void *code, size_t len);
+__cptext void codepatch_replace(uint16_t tag, const void *code, size_t len);
 __cptext void codepatch_call(uint16_t _tag, void *_func);
 __cptext void codepatch_jmp(uint16_t _tag, void *_func);
 void codepatch_disable(void);