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Re: [Qemu-devel] Ask for debugging linux kernel with Qemu 0.8.1 on Msys

From: Tieu Ma Dau
Subject: Re: [Qemu-devel] Ask for debugging linux kernel with Qemu 0.8.1 on Msys
Date: Wed, 7 Jun 2006 00:56:23 -0700 (PDT)

I recently try the patch you recommend but I got the same result. In fact, after make this patch into Qemu source code 0.8.1, I compiled it with these commands:
./configure --prefix=/travail/install/qemu-8.1
make install
And I run Qemu to simulate ARM on debugging mode:
./qemu-system-arm -kernel myKernel-with-kgdb -initrd arm_root.img -s
And I tried to connect to Qemu by default port 1234: (gdb) target remote localhost:1234
But I got the error: connection refused
So I test the current openned port in localhost by the command: netstat -ao
And the result I got is below:
Connexions actives

  Proto  Adresse locale         Adresse distante       Etat
  TCP    vinh-phu:epmap         vinh-phu:0             LISTENING       1056
  TCP    vinh-phu:microsoft-ds  vinh-phu:0             LISTENING       4
  TCP    vinh-phu:1025          vinh-phu:0             LISTENING       1216
  TCP    vinh-phu:1027          vinh-phu:0             LISTENING       4
  TCP    vinh-phu:2869          vinh-phu:0             LISTENING       1416
  TCP    vinh-phu:3016          vinh-phu:0             LISTENING       2036
  TCP    vinh-phu:3019          vinh-phu:0             LISTENING       2012
  TCP    vinh-phu:3026          vinh-phu:0             LISTENING       2012
  TCP    vinh-phu:5000          vinh-phu:0             LISTENING       1416
  TCP    vinh-phu:5101          vinh-phu:0             LISTENING       2012
  TCP    vinh-phu:3001          vinh-phu:0             LISTENING       1800
  TCP    vinh-phu:3002          vinh-phu:0             LISTENING       1216
  TCP    vinh-phu:3003          vinh-phu:0             LISTENING       1216
  TCP    vinh-phu:3015          vinh-phu:0             LISTENING       2036
  TCP    vinh-phu:3015          localhost:3016         ESTABLISHED     2036
  TCP    vinh-phu:3016          localhost:3015         ESTABLISHED     2036
  TCP    vinh-phu:3019          cs8.msg.dcn.yahoo.com:5050  ESTABLISHED     2012
  TCP    vinh-phu:3026          sip7.voice.re2.yahoo.com:5061  ESTABLISHED     2012
  TCP    vinh-phu:15871         vinh-phu:0             LISTENING       1988
  UDP    vinh-phu:epmap         *:*                                    1056
  UDP    vinh-phu:microsoft-ds  *:*                                    4
  UDP    vinh-phu:isakmp        *:*                                    896
  UDP    vinh-phu:1026          *:*                                    1216
  UDP    vinh-phu:3004          *:*                                    1216
  UDP    vinh-phu:3011          *:*                                    1988
  UDP    vinh-phu:3012          *:*                                    1384
  UDP    vinh-phu:3025          *:*                                    1384
  UDP    vinh-phu:3068          *:*                                    1384
  UDP    vinh-phu:3069          *:*                                    1384
  UDP    vinh-phu:3071          *:*                                    1384
  UDP    vinh-phu:3072          *:*                                    1384
  UDP    vinh-phu:3073          *:*                                    1384
  UDP    vinh-phu:3074          *:*                                    1384
  UDP    vinh-phu:ntp           *:*                                    1216
  UDP    vinh-phu:1900          *:*                                    1416
  UDP    vinh-phu:3005          *:*                                    1216
  UDP    vinh-phu:3009          *:*                                    1216
  UDP    vinh-phu:3022          *:*                                    2012
  UDP    vinh-phu:3441          *:*                                    2036
  UDP    vinh-phu:3997          *:*                                    1540
  UDP    vinh-phu:ntp           *:*                                    1216
  UDP    vinh-phu:1900          *:*                                    1416
  UDP    vinh-phu:3030          *:*                                    2012
  UDP    vinh-phu:3031          *:*                                    2012
  UDP    vinh-phu:8257          *:*                                    1988
  UDP    vinh-phu:57073         *:*                                    1988
Do you know any suggestion for this problem?
Thanks so much
Best regards.

Lonnie Mendez <address@hidden> wrote:
On Tue, 2006-06-06 at 05:35 -0700, Tieu Ma Dau wrote:
> Hi All,
> I've compiled Linux kernel 2.6.16 with kgdb on Linux. And after that,
> I've tried to debug this kernel with Qemu 0.8.1 on Msys to simulate
> ARM Processor. In fact, I've run the command below:
> qemu-system-arm -kernel myKernel -initrd arm_root.img -s
> But I can't make the connection from arm-toolchain-gdb to the port
> 1234 (by default, this port must be openned by Qemu when using the
> option -s for debugging)
> Furthermore, I've confirmed if the port 1234 is openned or not with
> the command: netstat -ao and there is not port 1234 openned. I've also
> try the option -p 123456 to change the default port for debugging of
> Qemu but I've got the same result.
> Do you know where the problem arrive?

Have you seen this?



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