[PATCH] RSB/gdb: upgrade sis to 2.11

[Chris Johns]

On 5/2/19 9:17 pm, Jiri Gaisler wrote:
> On 2/5/19 5:21 AM, Chris Johns wrote:
>> On 4/2/19 9:49 pm, Jiri Gaisler wrote:
>>> These two patches should be applied to gdb-8.2.1 to build sis for SPARC and RISC-V:
>> Thanks.
>>
>>> https://gaisler.se/gdb/gdb-8.2.1-riscv-config.patch
>>>
>>> https://gaisler.se/gdb/gdb-8.2.1-sis-2.11.patch
>> I see in this patch `erc32` has been removed and replaced with `sis`. What does
>> this mean?
>>
>> I have attached the patches to #3460. The SIS patch had to be compressed.
> 
> erc32 is a bit misleading since sis also emulates leon2/3 and riscv.

OK. We made a move from the sis bsp to erc32 recently in the documentation as
the base example bsp.

> To keep the files together, I created the new directory sis. The old erc32 directory is no longer maintained. I don't think it will be possible to merge sis in the foreseeable future. The gdb maintainers prefer simulators that use the built-in sim engine (sim/common) and discourage custom sims like sis.

OK.

> I will maintain sis out-of-tree for some time and then maybe make it self-standing using the gdbserver interface. 

The libserver code in RTEMS is under a libsdb license if it is in anyway useful.

> However, sis uses several binutils libraries (bfd, opcodes, readline) which makes it convenient to build it in the gdb tree. Having the simulator built-in to gdb is also convenient since we don't need to start a separate process and connect to some (hopefully) free port....

QEMU works this way and I have not found the separation an issue. What I do like
is the console not being messed up. When I run gdb psim or sis inside emacs,
which is using MI, I do not get the console output in the IO window which is a pain.

Chris