Re: git: d6c0538dae8d - main - ddb: Remove SOFTWARE_SSTEP support

From: John Baldwin <jhb_at_FreeBSD.org>
Date: Mon, 10 Jan 2022 19:47:59 UTC 
On 1/7/22 8:27 AM, Warner Losh wrote:
> The branch main has been updated by imp:
> 
> URL: https://cgit.FreeBSD.org/src/commit/?id=d6c0538dae8d138219dfd051994a44c50e741212
> 
> commit d6c0538dae8d138219dfd051994a44c50e741212
> Author:     Warner Losh <imp@FreeBSD.org>
> AuthorDate: 2022-01-07 16:25:33 +0000
> Commit:     Warner Losh <imp@FreeBSD.org>
> CommitDate: 2022-01-07 16:25:33 +0000
> 
>      ddb: Remove SOFTWARE_SSTEP support
>      
>      It was needed for mips only, and only kinda sorta worked for mips. It
>      can be brought back if we grow another architecture that need it.
>      
>      Sponsored by:           Netflix

RISC-V would need it in theory (no hardware single step), but no one has felt the
need to implement the backend support for it.  I think 32-bit arm doesn't support
hardware single step either (but again, no one has bothered to add the backend
support).

-- 
John Baldwin