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Re: [PATCH] pickles: Add btf-dump.pk BTF utility pickle


From: Jose E. Marchesi
Subject: Re: [PATCH] pickles: Add btf-dump.pk BTF utility pickle
Date: Sun, 14 Feb 2021 15:10:09 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux)

Hi David.

> +fun btf_dump_int = (BTF_Int i) void:
> +  {
> +    printf (" offset=%v bits=%v %s%s%s",
> +            i.offset#b, i.bits#b,
> +            i.signed_p ? "SIGNED " : "",
> +            i.bool_p ? "BOOL " : "", i.char_p ? "CHAR " : "");
> +  }

Every time I see something like i.offset#b or i.bits#b I wonder whether
the elements i.offset and i.bits shouldn't be rather be offsets instead
of integral values, i.e:

type BTF_Int =
  struct uint<32>
  {
    uint<4>;
    uint<1>;
    uint<1> bool_p;
    uint<1> char_p;
    uint<1> signed_p;
    offset<uint<8>,b> offset;
    uint<8>;
    offset<uint<8>,b> bits;

    /* XXX turn `encoding' into a nested integral struct once we
       support it in the compiler.  */
    method encoding = uint<4>:
    {
      return bool_p:::char_p:::signed_p;
    }
  };

Would the above be appropriate?
Other than that, this is great stuff! :)



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