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Re: [RFC] Win64 SEH support

From: Florian Weimer <fw at deneb dot enyo dot de>
To: Chris Lattner <clattner at apple dot com>
Cc: Richard Henderson <rth at redhat dot com>, GCC Patches <gcc-patches at gcc dot gnu dot org>
Date: Sun, 24 Oct 2010 12:57:47 +0200
Subject: Re: [RFC] Win64 SEH support
References: <4CC1CE9A.3090904@redhat.com> <5F6C6E7A-A2FD-4772-8B0B-E4B7049B569D@apple.com>

* Chris Lattner:

> Out of curiosity, how does this avoid the well-known SEH patents by
> borland and Microsoft?

AFAIK, SEH on Win64 does not use a control value on the stack, but
tables in the style of DWARF exception handling.

Win32 is different, and allegedly affected by the Borland patent
(whoever controls that nowadays).  I don't know if the previous
reluctance was based on valid IP concerns or on general disregard of
the Windows platform.

References:
- [RFC] Win64 SEH support
  - From: Richard Henderson
- Re: [RFC] Win64 SEH support
  - From: Chris Lattner

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