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Re: gold's emission of _GLOBAL_OFFSET_TABLE_
- From: Ian Lance Taylor <iant at google dot com>
- To: David Miller <davem at davemloft dot net>
- Cc: binutils at sourceware dot org
- Date: Mon, 07 Apr 2008 16:01:04 -0700
- Subject: Re: gold's emission of _GLOBAL_OFFSET_TABLE_
- References: <20080407.135834.70736146.davem@davemloft.net>
David Miller <davem@davemloft.net> writes:
> I can't tell which one is right, using the .got section index or
> SHN_ABS, perhaps the choice is arbitrary. Sun's linker seems to
> behave the same as gold.
I believe the choice is arbitrary. All that really matters is the
value.
> I also noticed that gold does not emit a _PROCEDURE_LINKAGE_TABLE_
> symbol as the BFD linker does.
In BFD, it's an option, controlled by elf_backend_want_plt_sym. Both
elf32-i386.c and elf64-x86_64.c set it to 0. So there is no reason
for gold to emit it as yet.
At the moment, in gold, symbols like _GLOBAL_OFFSET_TABLE_ and
_PROCEDURE_LINKAGE_TABLE_ need to be defined by the CPU.cc file. With
some more experience I hope that we can consolidate the CPU.cc files
some more.
Ian