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Subject[PATCH] 2.4 and 2.5: fix /proc/kcore
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

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