Home Original page

RFC: Add SHT_GNU_PHDRS

Florian Weimer fweimer@redhat.com
Thu Sep 27 12:42:00 GMT 2018 
* H. J. Lu:

> On Thu, Sep 27, 2018 at 3:35 AM, Szabolcs Nagy <nsz@port70.net> wrote:
>> an alloc .phdr section covering the program headers solves
>> this problem. if sections are not required for segments
>> then simply the linker should ensure that there is always
>> a load segment covering the program headers, possibly
>> without containing any sections, however elf says
>> "An object file segment contains one or more sections".
>>
>> i don't understand why a zero-size section is enough, what
>> if phdr > pagesize? will that get covered by the load
>> segment that is created for the zero-size section?
>
> Linker must keep this zero-size section in output and
> create a PT_LOAD segment to cover it even if it is
> the only SHF_ALLOC section in the PT_LOAD segment.

Based on Szabolcs' comment, I don't think the section can be zero-sized.

Thanks,
Florian
More information about the Binutils mailing list