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Re: LEXRA MIPS

To: "Bradley D. LaRonde" <brad@ltc.com>
Subject: Re: LEXRA MIPS
From: Tim Wu <chtimwu@libra.seed.net.tw>
Date: Sat, 13 Apr 2002 16:02:49 +0800
Cc: linux-mips <linux-mips@oss.sgi.com>
References: <3CB68CC8.1050207@libra.seed.net.tw> <005901c1e217$058f7f20$4c00a8c0@prefect>
Reply-to: chtimwu@libra.seed.net.tw
Sender: owner-linux-mips@oss.sgi.com
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:0.9.4) Gecko/20010914
I insert a show_registers() into the begining of do_ri().
It seems that CPU runs into data section.

$0 : 00000000 1000fc00 00000014 00000000 00000001 00000000 00000000 00000000
$8 : 0000fc00 7fff7a78 00000000 00000002 00000000 00000000 00000000 00000002
$16: 00000004 7fff7e10 7fff7e18 00000000 100604b0 00000600 7fff7e28 00000010
$24: 810d6080 00000000                   1005e870 7fff7a58 7fff7db0 7fff7a68
Hi : 00000000
Lo : 00000000
epc  : 7fff7aa8    Not tainted
Status: 0000fc0c
Cause : 10000028
Process ping (pid: 24, stackpage=81ff2000)
Stack: 386d4381 31323100 00000000 00000000 24021000 00000000 00000000 0000fc0c
       2ab39a1c 00000000 00000000 00000000 2ab9f550 00000000 00000200 00000000
       00000000 00000000 00000003 00000000 7fff7d08 00000000 000000c0 00000000
       00000000 00000000 0000fc00 00000000 81ff0210 00000000 00000000 00000000
       00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000
       00000002 ...
Call Trace:
Code: 00000000 00000003 00000000 <7fff7d08> 00000000 000000c0 00000000 00000000 00000000



Bradley D. LaRonde wrote:

----- Original Message -----
From: "Tim Wu" <chtimwu@libra.seed.net.tw>
To: "linux-mips" <linux-mips@oss.sgi.com>
Sent: Friday, April 12, 2002 3:29 AM
Subject: LEXRA MIPS



I traced the kernel source and found SIGILL is sent by the exception
handler, do_ri().


Can you tell what/where the reserved (illegal) instruction is that causes
the trap?

Regards,
Brad







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