[PATCH] bpf: Fixed register parsing disambiguating with possible symbol.

[Jose E. Marchesi]

Hi Cuper.
The patch is OK.
Thanks!

> This changes parse_bpf_register to detect possible symbols that start with valid
> register name, however due some following characters are not.
> Also changed the regs-for-symbols-pseudo.s, adding some entries that
> should not error if parser is properly detecting the symbol.
> ---
>  gas/config/tc-bpf.c                              | 4 ++++
>  gas/testsuite/gas/bpf/regs-for-symbols-pseudoc.s | 3 +++
>  2 files changed, 7 insertions(+)
>
> diff --git a/gas/config/tc-bpf.c b/gas/config/tc-bpf.c
> index 45abc3c9578..b6b1db47427 100644
> --- a/gas/config/tc-bpf.c
> +++ b/gas/config/tc-bpf.c
> @@ -1300,6 +1300,10 @@ parse_bpf_register (char *s, char rw, uint8_t *regno)
>        s += 1;
>      }
>  
> +  /* If we are still parsing a name, it is not a register.  */
> +  if (is_part_of_name (*s))
> +    return NULL;
> +
>    return s;
>  }
>  
> diff --git a/gas/testsuite/gas/bpf/regs-for-symbols-pseudoc.s b/gas/testsuite/gas/bpf/regs-for-symbols-pseudoc.s
> index 693787d5479..9b75f275285 100644
> --- a/gas/testsuite/gas/bpf/regs-for-symbols-pseudoc.s
> +++ b/gas/testsuite/gas/bpf/regs-for-symbols-pseudoc.s
> @@ -2,3 +2,6 @@
>          r2 = r3 ll
>          r2 = r3+1 ll
>          r2 = 1+r3 ll
> +        r2 = r2d2 ll
> +        r2 = r2d2+1 ll
> +        r2 = 1+r2d2 ll