Allow new just-symbols test to run on XCOFF and PE

[Alan Modra]

On Mon, Jul 27, 2020 at 03:15:05PM +0100, Maciej W. Rozycki wrote:
> On Mon, 27 Jul 2020, Alan Modra via Binutils wrote:
> 
> > 	* testsuite/ld-misc/just-symbols.exp: Run for x86_64 PE too.
> > 	Set LDFLAGS for PE and XCOFF.
> > 	* testsuite/ld-misc/just-symbols.ld: Accept XCOFF mapped .data.
> > 
> > diff --git a/ld/testsuite/ld-misc/just-symbols-1.dd b/ld/testsuite/ld-misc/just-symbols-1.dd
> > index 8908a235ae..9502566ac9 100644
> > --- a/ld/testsuite/ld-misc/just-symbols-1.dd
> > +++ b/ld/testsuite/ld-misc/just-symbols-1.dd
> > @@ -1,5 +1,3 @@
> > -.*: +file format .*
> > -
> > -Contents of section \.data:
> > +#...
> >   [0-9a-f]+ (?:(:?12000000|00120000|00000012) 0{8}|0{8} 00000012) 0{8} 0{8} .*
> >  #pass
> 
>  This breaks one purpose of the test case, that is ensuring that data from 
> the input `.data' section coming from just-symbols-1.o is first in the 
> output `.data' section; that is that `--just-symbols' actually works as 
> intended and does not pull contents from just-symbols-0.o/just-symbols-0. 
> 
>  Sorry not to have been clear about it in the change description of commit 
> 97c79e2174fb ("PR ld/26288: Allow the use of `--just-symbols' with ET_EXEC 
> input").
> 
>  Would you be able to update your change to keep that purpose?  What's 
> there with the affected targets that causes extra data to be present 
> ahead?

It's not extra data but rather that some aout formats don't even have
a .data section.

~/build/gas/i386-msdos/ld$ ../binutils/objdump -s tmpdir/just-symbols-1obj 

tmpdir/just-symbols-1obj:     file format msdos

Contents of section .text:
 0000 12000000 00000000 00000000 00000000  ................

I'll reinstate the "file format" and "Contents of section" lines but
match any named section.

-- 
Alan Modra
Australia Development Lab, IBM