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Re: Is it normal that ld promote a section size
- From: Terry Guo <flameroc at gmail dot com>
- To: Alan Modra <amodra at gmail dot com>
- Cc: binutils at sourceware dot org
- Date: Mon, 23 Feb 2015 15:50:23 +0800
- Subject: Re: Is it normal that ld promote a section size
- Authentication-results: sourceware.org; auth=none
- References: <CAGbRaL4YH8B-RKMSzTgOe4Steu=G-qw=Tv4aqT0c9aqDSCYgdQ at mail dot gmail dot com> <20150216065447 dot GG4274 at bubble dot grove dot modra dot org> <CAGbRaL6u+RUQPKnKB34zAbQZV3VjKd82OZE1ffgGKaX=Fnx7mg at mail dot gmail dot com> <CAGbRaL7CdCeSADO-XhM1SyMq9WBsHh-JExx9ci1qUMzKzxiTWQ at mail dot gmail dot com> <20150223071746 dot GJ11515 at bubble dot grove dot modra dot org>
On Mon, Feb 23, 2015 at 3:17 PM, Alan Modra <email@example.com> wrote:
> On Mon, Feb 23, 2015 at 09:47:26AM +0800, Terry Guo wrote:
>> 0x800 by gas. I checked SUB_SEGMENT_ALIGN as you suggested, but
>> couldn't find more detailed information to help me understand this
>> issue. Do you know the background why gas has to promote the size to
>> its alignment? Thanks.
> What binutils target are you using?
> As far as I known, SUB_SEGMENT_ALIGN was needed for compatibility with
> older assemblers (AOUT and COFF), and also on ia64 to ensure that code
> sections are a multiple of the bundle size. There may be other
> targets that have similar code section restrictions.
Thanks Alan. My target is arm-none-eabi and using ELF format for
object file. I will check ARM architecture documents to see if there
is such restrictions.