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Re: PATCH: Allow a global symbol set to common/undefined symbol
- From: Etienne Lorrain <etienne_lorrain at yahoo dot fr>
- To: Nick Clifton <nickc at redhat dot com>, "H. J. Lu" <hjl at lucon dot org>
- Cc: Dave Korn <dave dot korn at artimi dot com>, binutils at sources dot redhat dot com, drow at false dot org
- Date: Thu, 28 Apr 2005 16:02:08 +0200 (CEST)
- Subject: Re: PATCH: Allow a global symbol set to common/undefined symbol
Sorry to bother again...
With this patch and the source I am using, I have a problem elsewhere.
It is initially due to GCC doing hidden real call to memcpy and
memset when optimising for size (they consider calling those
functions save space...)
Basically because I am using two code segments (%cs can have two values
to have twice 64 Kbytes accessible) I need two memcpy/memset, one in each
segment. Because GCC insert real "call memset" I need to change the
name of the function called in the assembler file - I am doing:
asm ("memcpy = xcodeseg_memcpy \n");
asm ("memset = xcodeseg_memset \n");
So that "call memcpy" is replaced by "call xcodeseg_memcpy".
With the H.J. patch in the assembler, I get messages:
disk.s:7307: Error: Local symbol `memcpy' can't be equated to undefined
symbol `xcodeseg_memcpy'
I tried to define xcodeseg_memcpy as ".extern" of ".global" without
success - even if they really are defined elsewhere.
Is there a simple solution for my problem?
If needed the complete source is at sourceforge (GCC-3.4.2+):
http://prdownloads.sourceforge.net/gujin/gujin-1.0.tar.gz?download
just untar , cd gujin && make dep disk.o
Thanks,
Etienne.
--- Nick Clifton <nickc@redhat.com> wrote:
> Hi H. J.
>
> > gas/
> > 2005-04-25 H.J. Lu <hongjiu.lu@intel.com>
> >
> > * config/obj-multi.h (FAKE_LABEL_NAME): Defined.
> >
> > * read.c (pseudo_set): Disallow symbol set to common symbol.
> >
> > PR 857
> > * write.c (write_object_file): Report common symbol name when
> > disallowing local symbol set to common symbol.
> > (adjust_reloc_syms): Disallow local symbol set to undefined
> > symbol.
> >
> > gas/testsuite/
> > 2005-04-25 H.J. Lu <hongjiu.lu@intel.com>
> >
> > * gas/all/assign.s: Make `x' and `y' global.
>
> Approved - please apply.
>
> Cheers
> Nick
>
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