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Re: Re: How to inform the linker not to produce any data for a .bsssection?
- From: Daniel Jacobowitz <drow at false dot org>
- To: PRC <panruochen at gmail dot com>
- Cc: pkoning <pkoning at equallogic dot com>, binutils <binutils at sourceware dot org>
- Date: Tue, 11 Dec 2007 07:58:55 -0500
- Subject: Re: Re: How to inform the linker not to produce any data for a .bsssection?
- References: <20071209200658.GA26653@caradoc.them.org> <200712110919091773244@gmail.com>
On Tue, Dec 11, 2007 at 09:19:12AM +0800, PRC wrote:
> mips-elf-objdump -h a.out
> -------------------------------------------------------------------
> 3 .bss 00010620 81413898 81413898 00003898 2**3
> ALLOC
> 4 .reginfo 00000018 00000000 00000000 00013eb8 2**2
> CONTENTS, READONLY, LINK_ONCE_SAME_SIZE
> ------------------------------------------------------------------
> The difference between sections ".bss" and ".reginfo" is almost 64K,
> which is just the size of the buffer `cmd_buffer`. And I check the
> output file, and find there are lots of zero starting from the offset
> 0x3898. It seems the linker puts 64K zeros in the section ".bss".
This is necessary alignment. If you don't want .bss to take up space
in the file, do not put allocated sections after it.
--
Daniel Jacobowitz
CodeSourcery