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From: Jakub Jelinek <jakub@redhat.com>
To: Mark Wielaard <mark@klomp.org>
Cc: dwz@sourceware.org
Subject: Re: [PATCH] Support updating DWARF5 .debug_loclists.
Date: Tue, 29 Sep 2020 10:42:23 +0200	[thread overview]
Message-ID: <20200929084223.GX2176@tucnak> (raw)
In-Reply-To: <20200928080759.8619-1-mark@klomp.org>

On Mon, Sep 28, 2020 at 10:07:59AM +0200, Mark Wielaard wrote:
>    ptr += offset;
>    while (ptr < endsec)
>      {
> -      low = read_size (ptr, ptr_size);
> -      high = read_size (ptr + ptr_size, ptr_size);
> -      ptr += 2 * ptr_size;
> -      if (low == 0 && high == 0)
> -	break;
> +      if (cu->cu_version < 5)

I wonder if it wouldn't be clearer to use sec == DEBUG_LOC
in this spot (i.e. leave the decision based on cu_version just to the
start of the function).

> +	    case DW_LLE_start_length:
> +	      ptr += ptr_size;
> +	      skip_leb128 (ptr);
> +	      len = read_uleb128 (ptr);
> +	      break;

Wonder if we shouldn't handle case DW_LLE_GNU_view_part here, but perhaps
only for cu->cu_version == 5 because it isn't in a separate vendor code
space and thus in DWARF 6 it could mean something different.
>    while (ptr < endsec)
>      {
> -      low = read_size (ptr, ptr_size);
> -      high = read_size (ptr + ptr_size, ptr_size);
> -      ptr += 2 * ptr_size;
> -      if (low == 0 && high == 0)
> -	break;
> +      if (cu->cu_version < 5)

Ditto.

> +	    case DW_LLE_start_length:
> +	      ptr += ptr_size;
> +	      skip_leb128 (ptr);
> +	      len = read_uleb128 (ptr);
> +	      break;

Ditto.

Otherwise LGTM.

	Jakub


  reply	other threads:[~2020-09-29  8:42 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-28  8:07 Mark Wielaard
2020-09-29  8:42 ` Jakub Jelinek [this message]
2020-09-29 17:59   ` Mark Wielaard

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