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authorKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>2009-09-23 03:45:45 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-23 18:39:41 +0400
commit9492587cf35d370db33ef4b38375dfb35a105b61 (patch)
tree59daaf91e847d3c5cd6f542626da75db5814b06d /fs/proc/kcore.c
parenta0614da88b67ffa3dbcc0d40b817e682c7c4a0ee (diff)
downloadlinux-9492587cf35d370db33ef4b38375dfb35a105b61.tar.xz
kcore: register text area in generic way
Some 64bit arch has special segment for mapping kernel text. It should be entried to /proc/kcore in addtion to direct-linear-map, vmalloc area. This patch unifies KCORE_TEXT entry scattered under x86 and ia64. I'm not familiar with other archs (mips has its own even after this patch) but range of [_stext ..._end) is a valid area of text and it's not in direct-map area, defining CONFIG_ARCH_PROC_KCORE_TEXT is only a necessary thing to do. Note: I left mips as it is now. Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/proc/kcore.c')
-rw-r--r--fs/proc/kcore.c19
1 files changed, 18 insertions, 1 deletions
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index e10d360110bd..fdde1cc78392 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -21,6 +21,7 @@
#include <asm/uaccess.h>
#include <asm/io.h>
#include <linux/list.h>
+#include <asm/sections.h>
#define CORE_STR "CORE"
@@ -374,10 +375,26 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
static struct kcore_list kcore_vmalloc;
+#ifdef CONFIG_ARCH_PROC_KCORE_TEXT
+static struct kcore_list kcore_text;
+/*
+ * If defined, special segment is used for mapping kernel text instead of
+ * direct-map area. We need to create special TEXT section.
+ */
+static void __init proc_kcore_text_init(void)
+{
+ kclist_add(&kcore_text, _stext, _end - _stext, KCORE_TEXT);
+}
+#else
+static void __init proc_kcore_text_init(void)
+{
+}
+#endif
+
static int __init proc_kcore_init(void)
{
proc_root_kcore = proc_create("kcore", S_IRUSR, NULL, &proc_kcore_operations);
-
+ proc_kcore_text_init();
kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
VMALLOC_END - VMALLOC_START, KCORE_VMALLOC);
return 0;