On Mon, 2009-12-28 at 10:00 +0100, Danny Backx wrote:
> I just committed a cleaned up version of my current work.
>
> This now has .edata and .idata sections hidden in .rdata, and can
> generate working DLL and EXEs but with the SizeOfImage <= 10000 limit.
>
> Danny
I found one more issue, haven't figured out the reason yet though.
I got here by using a minimalistic example (a DLL with almost no code
but a big buffer). This gave me an error that I considered suspicious :
code 1114 (ERROR_DLL_INIT_FAILED).
So I tuned in on this, and ended up replacing the default
DllMainCRTStartup (from src/mingw) by an empty one. Cutting the story
shorter, the error appears to be in _pei386_runtime_relocator().
Replacing the underlying function do_pseudo_reloc() by an empty one also
got the DLL to load. Adding MessageBoxW() calls to print the arguments
succeeds, until I try to print the value of the third argument "base".
This is (from src/mingw/pseudo-reloc.c) :
do_pseudo_reloc (&__RUNTIME_PSEUDO_RELOC_LIST__,
&__RUNTIME_PSEUDO_RELOC_LIST_END__,
&__U(_image_base__));
I tried several versions :
wsprintf(msg, L"do_pseudo_reloc(%p,%p)", start, end); // works
wsprintf(msg, L"do_pseudo_reloc(%p)", base); // error 1114
{ DWORD a = start, b = end, c = base;
wsprintf(msg, L"do_pseudo_reloc(%08x,%08x,%08x)", a, b, c);
} // error 1114
Strangely the latter works with the assignment (c = base) but fails when
I try to print the value of c.
Obviously (feeling adventurous) the next thing is to relink a bunch of
DLLs with empty do_pseudo_reloc, and try a real application.
This turned out to work :-)
See http://danny.backx.info/download/cegcc/Capture.PNG
Two questions :
- why I cannot work with that third argument (_image_base__)
- which functionality have I now turned off by removing the content
of do_pseudo_reloc().
Danny
--
Danny Backx ; danny.backx - at - scarlet.be ; http://danny.backx.info
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