* LEXRA MIPS
@ 2002-04-12 7:29 Tim Wu
2002-04-12 11:41 ` Bradley D. LaRonde
0 siblings, 1 reply; 6+ messages in thread
From: Tim Wu @ 2002-04-12 7:29 UTC (permalink / raw)
To: linux-mips
Hi, everybody:
I'm working on porting Linux to a MIPS based processor whose IP is from
Lexra's LX4189 processor.
I started my work from the linux MIPS port of oss.sgi.com. Right now
the kernel can boot and run some user applications well.
But I met a problem that once a process raises any kind of signal,
kernel will send a SIGILL signal to the process which let the process stop.
I traced the kernel source and found SIGILL is sent by the exception
handler, do_ri().
The problem is very weird because when I change to another crosscompiler
or insert some asserting code to functions in signal.c. The kernel
become unbootable. I hope someone can give me directions to solve this
bug or tell me who already done Linux on Lexra?
kernel version:2.4.17.
toolchain: GCC 3.1 from ftp.cotw.com.
use new IRQ and new timer interface.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: LEXRA MIPS
2002-04-12 7:29 LEXRA MIPS Tim Wu
@ 2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-13 8:02 ` Tim Wu
0 siblings, 2 replies; 6+ messages in thread
From: Bradley D. LaRonde @ 2002-04-12 11:41 UTC (permalink / raw)
To: chtimwu, linux-mips
----- 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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: LEXRA MIPS
2002-04-12 11:41 ` Bradley D. LaRonde
@ 2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-13 8:02 ` Tim Wu
1 sibling, 0 replies; 6+ messages in thread
From: Bradley D. LaRonde @ 2002-04-12 11:41 UTC (permalink / raw)
To: chtimwu, linux-mips
----- 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
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: LEXRA MIPS
2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-12 11:41 ` Bradley D. LaRonde
@ 2002-04-13 8:02 ` Tim Wu
2002-04-13 14:44 ` Bradley D. LaRonde
1 sibling, 1 reply; 6+ messages in thread
From: Tim Wu @ 2002-04-13 8:02 UTC (permalink / raw)
To: Bradley D. LaRonde; +Cc: linux-mips
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
>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: LEXRA MIPS
2002-04-13 8:02 ` Tim Wu
@ 2002-04-13 14:44 ` Bradley D. LaRonde
2002-04-13 14:44 ` Bradley D. LaRonde
0 siblings, 1 reply; 6+ messages in thread
From: Bradley D. LaRonde @ 2002-04-13 14:44 UTC (permalink / raw)
To: chtimwu; +Cc: linux-mips
You say this only happens when a process raises a signal.
Maybe the signal trampoline is getting messed up.
Do you see the same behaviour with and without a signal handler installed
for the raised signal?
Regards,
Brad
----- Original Message -----
From: "Tim Wu" <chtimwu@libra.seed.net.tw>
To: "Bradley D. LaRonde" <brad@ltc.com>
Cc: "linux-mips" <linux-mips@oss.sgi.com>
Sent: Saturday, April 13, 2002 4:02 AM
Subject: Re: LEXRA MIPS
> 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
> >
> >
> >
>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: LEXRA MIPS
2002-04-13 14:44 ` Bradley D. LaRonde
@ 2002-04-13 14:44 ` Bradley D. LaRonde
0 siblings, 0 replies; 6+ messages in thread
From: Bradley D. LaRonde @ 2002-04-13 14:44 UTC (permalink / raw)
To: chtimwu; +Cc: linux-mips
You say this only happens when a process raises a signal.
Maybe the signal trampoline is getting messed up.
Do you see the same behaviour with and without a signal handler installed
for the raised signal?
Regards,
Brad
----- Original Message -----
From: "Tim Wu" <chtimwu@libra.seed.net.tw>
To: "Bradley D. LaRonde" <brad@ltc.com>
Cc: "linux-mips" <linux-mips@oss.sgi.com>
Sent: Saturday, April 13, 2002 4:02 AM
Subject: Re: LEXRA MIPS
> 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
> >
> >
> >
>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
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2002-04-12 7:29 LEXRA MIPS Tim Wu
2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-12 11:41 ` Bradley D. LaRonde
2002-04-13 8:02 ` Tim Wu
2002-04-13 14:44 ` Bradley D. LaRonde
2002-04-13 14:44 ` Bradley D. LaRonde
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