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Date: Fri, 18 Aug 2006 18:38:00 -0000
From: Vivek Goyal <vgoyal@in.ibm.com>
To: gdb@sourceware.org
Cc: Dave Anderson <anderson@redhat.com>
Subject: "gdb vmlinux" gives wrong symbol addresses
Message-ID: <20060818183807.GD12962@in.ibm.com>
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Hi,

I am trying to run gdb with kernel vmlinux to find out symbol addresses.

#> gdb vmlinux
(gdb) p &linux_banner

If I link my vmlinux with linker option --emit-relocs then gdb seems
to be giving wrong values for the symbols.

Following are two outputs.

vmlinux linked without option --emit-relocs

(gdb) p &linux_banner
$1 = (char (*)[162]) 0xc0344000

vmlinux linked with option --emit-relocs

(gdb) p &linux_banner
$1 =  (char (*)[162]) 0x8068a000

Above address is not a kernel address at all.

I have compiled my kernel with -g for i386 machine. I am using gdb
version 6.3

Any suggestions regarding where the anomaly is will help.

Thanks
Vivek