Re: [ECOS] SIGTRAP, Trace/breakpoint trap

[royston.choo@delphiauto.com]

Jonathan Larmour <jlarmour@redhat.co.uk> on 06/28/2000 20:59:30


To:   Royston Choo/Contract/US/DELCO@DELCO
cc:   ecos-discuss@sourceware.cygnus.com

Subject:  Re: [ECOS] SIGTRAP, Trace/breakpoint trap



royston.choo@delphiauto.com wrote:
>>
>> Has anyone seen SIGTRAP error while running (continue) GDB Insight?
>> error message: "Program received signal SIGTRAP, Trace/breakpoint trap"
>>
>> I thought it could be an exception, where can I trace down this trap?

>This generally happens because the program has hit a breakpoint where GDB
>doesn't think there should be one. A common case is if the board resets, at
>which point the boot ROM on the board will deliberately hit a breakpoint
>instruction (on most targets anyway).

>Another common case is if the application does not co-operate with the GDB
>stub in the ROM, _and_ the application doesn't have GDB stubs embedded
>itself. If this is the case, generally you can successfully hit *one*
>breakpoint, but never continue successfully from it. The fix is to include
>GDB stubs in your app by enabling the appropriate option in the eCos
>config.

>To give a more definite answer, of course, I'd need to know your target,
>platform, eCos version, ROM stub, whether you have GDB stubs included or
>not, and in exactly what situation this happens anyway :-).

I am using the DK177 target board running NEC V850-SB1 processor. eCos version
1.3.10.
GDB stub is downloaded into the processor.

I had added a GPIO driver package into the eCos config., yet to be tested.
Also created a simple test program, test.exe.

Having downloaded and run the test.exe, hitting 'continue' will generate a
SIGTRAP.
SIGTRAP will keep on coming up as long as I hit 'continue'.


Royston






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Date: Thu, 29 Jun 2000 02:59:30 +0100
From: Jonathan Larmour <jlarmour@redhat.co.uk>
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To: royston.choo@delphiauto.com
CC: ecos-discuss@sourceware.cygnus.com
Subject: Re: [ECOS] SIGTRAP, Trace/breakpoint trap
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|usabhmg98/g/server/delphiauto          |
|usabhhu98/h/server/delphiauto          |
|USKOKH01/DELCO                         |
|USKOKHM1/DELCO                         |
|USKOKM14/DELCO                         |
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  |06/28/2000 21:00:11 - 06/28/2000       |
  |21:00:11                               |
  |06/28/2000 21:58:10 - 06/28/2000       |
  |21:58:11                               |
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  |21:00:13                               |
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  |21:00:14                               |
  |06/28/2000 20:59:43 - 06/28/2000       |
  |20:59:44                               |
  >---------------------------------------|









Joo Meng Choo (Royston)

------------------------------------------------------------
        Mobile Multimedia Group
        Delphi Delco Electronics Systems
        Delphi Automotive Systems
        Office: 1-765-4511745
        Location: Plant 10, R302

        royston.choo@delphiauto.com
        http://www.angen.net/~Royston