Module Name: src
Committed By: rin
Date: Mon Oct 11 14:14:40 UTC 2021
Modified Files:
src/sys/dev: kloader.c
Log Message:
Zero clear sh_offset to indicate a section is unused.
Avoid kernel text being doubly allocated due to non-zero sh_offset for
unused sections.
None of MD codes and kern_ksyms.c use sh_type == SHT_NULL (yet?) to
determine whether a section is unused.
To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/dev/kloader.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/dev/kloader.c
diff -u src/sys/dev/kloader.c:1.29 src/sys/dev/kloader.c:1.30
--- src/sys/dev/kloader.c:1.29 Tue Jun 29 22:40:53 2021
+++ src/sys/dev/kloader.c Mon Oct 11 14:14:40 2021
@@ -1,4 +1,4 @@
-/* $NetBSD: kloader.c,v 1.29 2021/06/29 22:40:53 dholland Exp $ */
+/* $NetBSD: kloader.c,v 1.30 2021/10/11 14:14:40 rin Exp $ */
/*-
* Copyright (c) 2001, 2002, 2004 The NetBSD Foundation, Inc.
@@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kloader.c,v 1.29 2021/06/29 22:40:53 dholland Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kloader.c,v 1.30 2021/10/11 14:14:40 rin Exp $");
#include "debug_kloader.h"
@@ -263,9 +263,11 @@ kloader_load(void)
symndx = i;
else if (strcmp(shstrtab + sh[i].sh_name, ".strtab") == 0)
strndx = i;
- else if (i != eh.e_shstrndx)
+ else if (i != eh.e_shstrndx) {
/* while here, mark all other sections as unused */
sh[i].sh_type = SHT_NULL;
+ sh[i].sh_offset = 0;
+ }
}
if (symndx < 0 || strndx < 0) {
