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Re: Problem with library images on Windows (again)

From: Andreas Schwab
Subject: Re: Problem with library images on Windows (again)
Date: Wed, 18 May 2005 21:30:01 +0200
User-agent: Gnus/5.110003 (No Gnus v0.3) Emacs/22.0.50 (gnu/linux)

Juanma Barranquero <address@hidden> writes:

> Now, when this happened before (with the local variable img) someone
> said that the MinGW libraries were not respecting calling conventions,
> but I'm not sure. Calling conventions for MSVC say that you cannot
> trust EAX, EBX, ECX, EDX, ESI, or EDI registers after a subroutine

That's quite different from the Unix calling conventions on i386, where
only EAX, ECX and EDX are call-clobbered.

> call, and AFAICS, the problem is that on optimized builds VC is
> expecting spec to still be cached in a register.

That appears like a blatant bug in the compiler if it cannot properly
track call-clobbered registers.


Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
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"And now for something completely different."

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