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Re: [PATCH] Kernel fixes for Cygwin

From: Christian Franke
Subject: Re: [PATCH] Kernel fixes for Cygwin
Date: Tue, 22 Jul 2008 18:58:57 +0200
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv: Gecko/20071128 SeaMonkey/1.1.7

Bean wrote:
On Mon, Jul 21, 2008 at 6:33 PM, Christian Franke
<address@hidden> wrote:

due to the complexity of PE, a stand-alone converter may likely be
larger than the ~680 LoC converter I already offered here. It was
rejected, see this thread:


I can't find the source code for your converter, perhaps you can repost it ?

I did not post it in the original thread from 2007-11.

It is actually a reduced version of objcopy with
- stuff not necessary for object format conversion removed,
- some functions from shared modules added to make it self-contained,
- the fix for the pc-relative relocation added to

It was intended as starting point to get rid of the hack in kern/i386/dl.c.

The hard work is still done by BFD.

IMO, it's better to use our own tool, if it's not very complicated. I
learn this lesson when writing efi support for x86_64. The gnu-efi
toolchain can produce efi image, but it turns out to have some
limitation on relocation, and it's hard to fix. I end up modifying
grub-mkimage to support converting elf to pe32+. Relying on external
tool means we are at the mercy of them, it's annoying when they have
issue, as we can't expect upstream to fix it soon.

Yes, an own tool is probably best in the long term.

But such a tool will be likely not available for GRUB 1.97 tarball release.


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