Re: [Qemu-devel] [PATCH] Fix breakpoints in nios2 user-mode emulation.

["Alex Bennée" <alex.bennee@linaro.org>]

Richard Henderson <richard.henderson@linaro.org> writes:

> On 09/11/2018 02:29 PM, Sandra Loosemore wrote:
>> Without this patch, QEMU exits immediately when it execution stops at
>> a breakpoint, instead of reporting it to GDB.
>>
>> Signed-off-by: Sandra Loosemore <sandra@codesourcery.com>
>> ---
>>  linux-user/nios2/cpu_loop.c | 3 +++
>>  1 file changed, 3 insertions(+)
>>
>> diff --git a/linux-user/nios2/cpu_loop.c b/linux-user/nios2/cpu_loop.c
>> index dac7a06..a5ae37f 100644
>> --- a/linux-user/nios2/cpu_loop.c
>> +++ b/linux-user/nios2/cpu_loop.c
>> @@ -71,6 +71,9 @@ void cpu_loop(CPUNios2State *env)
>>                  gdbsig = TARGET_SIGTRAP;
>>                  break;
>>              }
>> +        case EXCP_DEBUG:
>> +            gdbsig = TARGET_SIGTRAP;
>> +            break;
>
> This really isn't complete.  You set gdbsig from odd places instead of using
> queue_signal; you fail to honor the return value from gdb_handlesig.
>
> But I suppose those should be separate patches, so
> Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

At least the cpu_loops have been separated now.. I guess the next step
is to audit each one for common features? There do seem to be some magic
numbers in the nios loop which I find concerning.

>
>
> r~


--
Alex Bennée