From: Russell King <rmk@arm.linux.org.uk>
To: linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@transmeta.com>,
Marcelo Tosatti <marcelo@conectiva.com.br>,
davej@suse.de
Subject: [PATCH] 2.4 and 2.5: fix /proc/kcore
Date: Fri, 15 Mar 2002 13:28:37 +0000 [thread overview]
Message-ID: <20020315132837.D24984@flint.arm.linux.org.uk> (raw)
As mentioned on May 11 on LKML, here is a patch to fix /proc/kcore for
architectures which do not have RAM located at physical address 0.
I did say I'd send this on Monday, however I only got feedback from the
ia64 people, and /proc/kcore is already broken on their machines anyway.
(They need to fix it up; they place modules below PAGE_OFFSET, which
breaks our generated ELF core header).
So I've decided to send it a few days early.
Please apply.
--- orig/fs/proc/kcore.c Fri Mar 15 10:14:44 2002
+++ linux/fs/proc/kcore.c Fri Mar 15 11:18:21 2002
@@ -381,8 +381,13 @@
return tsz;
}
#endif
- /* fill the remainder of the buffer from kernel VM space */
- start = (unsigned long)__va(*fpos - elf_buflen);
+
+ /*
+ * Fill the remainder of the buffer from kernel VM space.
+ * We said in the ELF header that the data which starts
+ * at 'elf_buflen' is virtual address PAGE_OFFSET. --rmk
+ */
+ start = PAGE_OFFSET + (*fpos - elf_buflen);
if ((tsz = (PAGE_SIZE - (start & ~PAGE_MASK))) > buflen)
tsz = buflen;
--
Russell King (rmk@arm.linux.org.uk) The developer of ARM Linux
http://www.arm.linux.org.uk/personal/aboutme.html
reply other threads:[~2002-03-15 13:29 UTC|newest]
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