* set breakpoints in remote debugging
[not found] <20051102171409.M10763@eos.cs.nthu.edu.tw>
@ 2005-11-02 17:34 ` fzchuan
2005-11-02 17:36 ` Daniel Jacobowitz
2005-11-02 17:37 ` Paul Koning
0 siblings, 2 replies; 3+ messages in thread
From: fzchuan @ 2005-11-02 17:34 UTC (permalink / raw)
To: gdb
Hi all:
I encountered some problems in GDB remote debugging.
In most of time, GDB host would send correct breakpoint address to target which
I asked it. But sometimes it would send strange address.
That is,in GDB host side,I set breakpoint on some address,i.e.:
(gdb)b *0x8
Then, in target side, target will receive the request.
I print the message received from GDB host,
and it shows that GDB ask target to stop at 0xc6
I use GDB disassemble to query 0x8, and is shows that it is a Call (JUMP)
instruction and jump target address is 0xc6.
Why? thanks
Pin-Chuan
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: set breakpoints in remote debugging
2005-11-02 17:34 ` set breakpoints in remote debugging fzchuan
@ 2005-11-02 17:36 ` Daniel Jacobowitz
2005-11-02 17:37 ` Paul Koning
1 sibling, 0 replies; 3+ messages in thread
From: Daniel Jacobowitz @ 2005-11-02 17:36 UTC (permalink / raw)
To: fzchuan; +Cc: gdb
On Thu, Nov 03, 2005 at 01:34:48AM +0800, fzchuan wrote:
>
> Hi all:
>
> I encountered some problems in GDB remote debugging.
> In most of time, GDB host would send correct breakpoint address to target which
> I asked it. But sometimes it would send strange address.
> That is,in GDB host side,I set breakpoint on some address,i.e.:
> (gdb)b *0x8
>
> Then, in target side, target will receive the request.
> I print the message received from GDB host,
> and it shows that GDB ask target to stop at 0xc6
>
> I use GDB disassemble to query 0x8, and is shows that it is a Call (JUMP)
> instruction and jump target address is 0xc6.
>
> Why? thanks
There is not enough information to answer your question. When does
this happen? What does the remote protocol and GDB console show when
it does? What target is this?
--
Daniel Jacobowitz
CodeSourcery, LLC
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: set breakpoints in remote debugging
2005-11-02 17:34 ` set breakpoints in remote debugging fzchuan
2005-11-02 17:36 ` Daniel Jacobowitz
@ 2005-11-02 17:37 ` Paul Koning
1 sibling, 0 replies; 3+ messages in thread
From: Paul Koning @ 2005-11-02 17:37 UTC (permalink / raw)
To: fzchuan; +Cc: gdb
>>>>> "fzchuan" == fzchuan <fzchuan@eos.cs.nthu.edu.tw> writes:
fzchuan> Hi all:
fzchuan> I encountered some problems in GDB remote debugging. In
fzchuan> most of time, GDB host would send correct breakpoint address
fzchuan> to target which I asked it. But sometimes it would send
fzchuan> strange address. That is,in GDB host side,I set breakpoint
fzchuan> on some address,i.e.: (gdb)b *0x8
fzchuan> Then, in target side, target will receive the request. I
fzchuan> print the message received from GDB host, and it shows that
fzchuan> GDB ask target to stop at 0xc6
fzchuan> I use GDB disassemble to query 0x8, and is shows that it is
fzchuan> a Call (JUMP) instruction and jump target address is 0xc6.
fzchuan> Why? thanks
You probably did a step command. Step is usually done by setting a
breakpoint at the address after the instruction. For jumps, that
"next" address is the target address.
paul
^ permalink raw reply [flat|nested] 3+ messages in thread
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[not found] <20051102171409.M10763@eos.cs.nthu.edu.tw>
2005-11-02 17:34 ` set breakpoints in remote debugging fzchuan
2005-11-02 17:36 ` Daniel Jacobowitz
2005-11-02 17:37 ` Paul Koning
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