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Re: Problem with x64 SEH macro implementation for ReactOS
- From: rridge at csclub dot uwaterloo dot ca (Ross Ridge)
- To: gcc at gcc dot gnu dot org
- Date: Thu, 27 Nov 2008 17:36:22 -0500 (EST)
- Subject: Re: Problem with x64 SEH macro implementation for ReactOS
Kai Tietz writes:
>Well, you mean the SEH tables on stack.
No, I mean the ABI required unwind information.
> Well, those aren't implemented (as they aren't for 32-bit).
64-bit SEH handling is completely different from 32-bit SEH handling.
In the 64-bit Windows ABI exceptions are handled using unwind tables
similar in concept to DWARF2 exceptions. There are no SEH tables on
the stack. In the 32-bit ABI exceptions are handled using a linked list
of records on the stack, similar to SJLJ exceptions.
> But the the unwinding via RtlUnwind and RtlUnwindEx do their job even
>for gcc compiled code quite well
I don't see how it would be possible in the general case. Without the
unwind talbes Windows doesn't have the required information to unwind
through GCC compiled functions.
Ross Ridge