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kcore: register text area in generic way

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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>
This commit is contained in:
KAMEZAWA Hiroyuki
2009-09-22 16:45:45 -07:00
committed by Linus Torvalds
parent a0614da88b
commit 9492587cf3
5 changed files with 28 additions and 6 deletions
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19
fs/proc/kcore.c
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@ -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;