[PATCH v2] ld: Sort section contributions in PDB files

[Jan Beulich]

On 27.02.2023 01:59, Mark Harmstone wrote:
> @@ -4177,32 +4210,43 @@ create_section_contrib_substream (bfd *abfd, void **data, uint32_t *size)
>      {
>        for (asection *s = in->sections; s; s = s->next)
>  	{
> -	  uint16_t sect_num;
> -
>  	  if (s->size == 0 || discarded_section (s))
>  	    continue;
>  
> -	  sect_num = find_section_number (abfd, s->output_section);
> -
> -	  memcpy (&sc->characteristics,
> -		  sect_flags + ((sect_num - 1) * sizeof (uint32_t)),
> -		  sizeof (uint32_t));
> -
> -	  bfd_putl16 (sect_num, &sc->section);
> -	  bfd_putl16 (0, &sc->padding1);
> -	  bfd_putl32 (s->output_offset, &sc->offset);
> -	  bfd_putl32 (s->size, &sc->size);
> -	  bfd_putl16 (mod_index, &sc->module_index);
> -	  bfd_putl16 (0, &sc->padding2);
> -	  bfd_putl32 (0, &sc->data_crc);
> -	  bfd_putl32 (0, &sc->reloc_crc);
> +	  sc2->s = s;
> +	  sc2->sect_num = find_section_number (abfd, s->output_section);
> +	  sc2->mod_index = mod_index;
>  
> -	  sc++;
> +	  sc2++;
>  	}
>  
>        mod_index++;
>      }
>  
> +  qsort (sc_in, num_sc, sizeof (struct in_sc), section_contribs_compare);

You want to apply Nick's requested change here as well, changing
sizeof (struct in_sc) to sizeof (* sc_in). Okay with that adjustment,
assuming ...

> +  ptr = *data;
> +  sc = (struct section_contribution *) (ptr + 1); /* Skip the version word.  */

... you did at least consider Nick's remark regarding this, but
didn't find any good replacement (and Nick's suggestion also didn't
fit).

Jan