Date: 10 Feb 2004 11:04:38 +0000 From: Hong MingJian <superhaar@263.sina.com> To: freebsd-hackers@freebsd.org Subject: kernel load address Message-ID: <87n07rp54p.fsf@263.sina.com>
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Hi all,
When reading locore.s, I have the following question.
In the locore.s, there's a macro R defined as
#define R(foo) ((foo)-KERNBASE)
where KERNBASE equals to 0xC0000000.
But in the sys/conf/ldscript.i386, it reads
SECTIONS
{
. = kernbase + 0x00100000 + SIZEOF_HEADERS;
.....
}
The kernel is loaded at 0x00100000 by boot2 or loader with program
header stripped. So, how the R macro can still work?
I think it should be defined as `((foo)-KERNBASE-SIZEOF_HEADERS)' or
the ldscript.i386 should be modified to
. = kernbase + 0x00100000;
I refers to the ld script for Linux i386 kernel(vmlinux.lds), it reads
SECTIONS
{
. = 0xC0000000 + 0x100000;
..........
}
Thanks.
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