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Re: [PATCH] PR binutils/18218: bad handling of .debug_str_offsets section
- From: "H.J. Lu" <hjl dot tools at gmail dot com>
- To: Doug Evans <dje at google dot com>
- Cc: Binutils <binutils at sourceware dot org>
- Date: Fri, 10 Apr 2015 11:37:34 -0700
- Subject: Re: [PATCH] PR binutils/18218: bad handling of .debug_str_offsets section
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On Fri, Apr 10, 2015 at 11:31 AM, Doug Evans <dje@google.com> wrote:
> On Thu, Apr 9, 2015 at 1:29 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> On Thu, Apr 9, 2015 at 12:35 PM, Doug Evans <dje@google.com> wrote:
>>> H.J. Lu writes:
>>> > On Thu, Apr 9, 2015 at 11:03 AM, Doug Evans <dje@google.com> wrote:
>>> > > On Thu, Apr 9, 2015 at 10:41 AM, H.J. Lu <hjl.tools@gmail.com> wrote:
>>> > >>> Even better, treat the "sec" argument to load_specific_debug_section
>>> > >>> as "const Elf_Internal_Shdr * sec".
>>> > >>> Modifying sec->sh_size to be the size of the now-uncompressed section
>>> > >>> is fragile and what led to this bug. Leave this data be the
>>> > >>> representation of what's actually on disk, and build on it, not modify
>>> > >>> it.
>>> > >>
>>> > >> We need to update sh_size to get readelf to work right.
>>> > >
>>> > > I don't understand.
>>> > > There are lots of ways to make readelf work right.
>>> > > Some better than others.
>>> >
>>> > Patches are welcome.
>>>
>>> I would have expected a more technical explanation of why
>>> the proposed patch is ok.
>>>
>>> How about this?
>>>
>>> [I can imagine there's more work to do along these lines.
>>> At least this headed in a good direction.
>>>
>>> Ultimately, I can imagine adding a backlink from
>>> dwarf_section to Elf_Internal_Shdr, though a more sound
>>> proposal would need more research.]
>>>
>>> 2015-04-09 Doug Evans <dje@google.com>
>>>
>>> PR binutils/18218
>>> * readelf.c (printable_section_name): Constify sec argument.
>>> (apply_relocations): Ditto. New arg "size". All callers updated.
>>> (load_specific_debug_section): Constify sec argument.
>>> Remove side-effect of modifying sec->sh_size.
>>>
>>
>> It looks good to me. Does it pass "make check"?
>
> On amd64-linux, yes.
I would say check it in.
--
H.J.