[PATCH] RISC-V: tighten post-relocation-operator separator expectation

[Nelson Chu]

Thanks for helping to fix this :)

Nelson

On Fri, Apr 28, 2023 at 8:57 PM Jan Beulich <jbeulich@suse.com> wrote:

> As per the spec merely a blank isn't okay as a separator, the operand
> to the relocation function ought to be parenthesized. Enforcing this
> then also eliminates an inconsistency in that
>
>         lui     t0, %hi sym
>         lui     t0, %hi 0x1000
>
> were accepted, but
>
>         lui     t0, %hi +sym
>         lui     t0, %hi -0x1000
>
> were not.
>
> --- a/gas/config/tc-riscv.c
> +++ b/gas/config/tc-riscv.c
> @@ -2200,7 +2200,9 @@ parse_relocation (char **str, bfd_reloc_
>        {
>         size_t len = 1 + strlen (percent_op->str);
>
> -       if (!ISSPACE ((*str)[len]) && (*str)[len] != '(')
> +       while (ISSPACE ((*str)[len]))
> +         ++len;
> +       if ((*str)[len] != '(')
>           continue;
>
>         *str += len;
> --- a/gas/testsuite/gas/riscv/auipc-parsing.l
> +++ b/gas/testsuite/gas/riscv/auipc-parsing.l
> @@ -3,3 +3,5 @@
>  .*: Error: illegal operands `lui x10,x11'
>  .*: Error: illegal operands `auipc x12,symbol'
>  .*: Error: illegal operands `lui x13,symbol'
> +.*: Error: illegal operands `auipc x14,%hi symbol'
> +.*: Error: illegal operands `lui x15,%hi symbol'
> --- a/gas/testsuite/gas/riscv/auipc-parsing.s
> +++ b/gas/testsuite/gas/riscv/auipc-parsing.s
> @@ -4,3 +4,6 @@
>  # Don't accept a symbol without %hi() for 'u' operands.
>         auipc   x12,symbol
>         lui     x13,symbol
> +# Don't accept reloc functions without parentheses.
> +       auipc   x14,%hi symbol
> +       lui     x15,%hi symbol
>