Date: Mon, 1 Feb 1999 14:26:09 +0100
From: Laszlo Molnar <laszlo DOT molnar AT eth DOT ericsson DOT se>
To: djgpp-workers AT delorie DOT com
Subject: Re: egcs patch
Message-ID: <19990201142609.A20469@duna41>
References: <Pine DOT A41 DOT 4 DOT 05 DOT 9901281352520 DOT 33180-100000 AT ieva01 DOT lanet DOT lv>; <19990201122050 DOT B20126 AT duna41> <B0000069167 AT stargate DOT astr DOT lu DOT lv>
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In-Reply-To: <B0000069167@stargate.astr.lu.lv>; from Andris Pavenis on Mon, Feb 01, 1999 at 02:03:56PM +0200
Reply-To: djgpp-workers AT delorie DOT com

On Mon, Feb 01, 1999 at 02:03:56PM +0200, Andris Pavenis wrote:
> > On Thu, Jan 28, 1999 at 01:53:24PM +0200, Andris Pavenis wrote:
> > > > The new gas works nicely. Where can I download the snapshot from?
> > > ftp://ftp.cygnus.com/private/gas/
> > This weekend I played with it a little bit, and found the alignment
> > problem in strip (and other binutils). There is a COFF_PAGE_SIZE
> > define in coff_i386.c which sets this symbol to 0x1000. By adding an
> > #ifndef COFF_GO32_EXE...#endif around it, the aligment problem is
> > solved.
> Then perhaps it would be best to submit patch for binutils.

Ok, I'll send a patch to the maintainers soon. 

> > As I'm ready with the cross-binutils, I'll focus on hacking egcs ;-) I
> > plan to reduce the size of the eh_frame info for djgpp...
> Is it needed? GNU assembler already have eh frame optimization (works when
> built as BFD assembler). Is it necessary to duplicate it somewhere else.

The EH frame optimization stuff in gas is nice, but there are still too
much unused bytes in the eh_frame section. This dwarf2 frame info was
invented to be used by debuggers, so it contains very detailed
information about the program. Djgpp programs don't need lots of
them.

> One more thing about BFD assembler. I found that using BFD assembler 
> sometimes breaks fsdb and edebug32 which use COFF debugging info support
> from src/debug/common/syms.c. I found it when tried to run gnuplot-3.7
> built for DJGPP under fsdb: it simply crashed while loading  debugging info.
> Tested: this problem disappears when I'm building assembler after configuring
> binutils snapshot without option --enable-bfd-assembler. This problem appears
> only sometimes (not for all executables)

So the snapshot is not stable enough yet. Sigh.

bye,Laszlo