[Skyeye-developer] Re: Found a bug in gdb single-stepping code

[kang shuo]

tomei:
     Thanks!The patch is merged to cvs repository.
- Michael.Kang

On 8/6/06, Tomei Ningen <tomei.ningen at yahoo.com> wrote:
> Hi,
>
> I found a bug if you single step the very first instrution in the ELF image.
> I.e.,
>
>     skyeye -e linux -d
>
>     arm-elf-gdb linux
>     target remote localhost:12345
>     si
>
> This would change the PC to 0x04, and execute the instruction there,
> regardless of the entry point of the ELF image.
>
> The fix is simple. With 1.2.0-RC8 release, patch utils/debugger/arch_reg.c:
>
> void gdbserver_step(){
>      if(!strcmp(skyeye_config.arch->arch_name,"arm")){
>         //chy 2006004-12
> +++     state->NextInstr = RESUME;    /* treat as PC change */
>         state->Reg[15]=ARMul_DoInstr (state);
>     }
> }
>
> I guess no one found this bug because the SkyEye developers are way past
> debugging the first instruction in your program :-)
>
> - TN
>
>  		
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