[linux-cirrus] Re: crunch C++ exceptions
- From: "Hasjim Williams" <linux-cirrus@xxxxxxxxxxxxxxxxx>
- To: linux-cirrus@xxxxxxxxxxxxx
- Date: Tue, 18 Mar 2008 13:33:50 +1000
On Mon, 25 Feb 2008 14:32:06 +0100, wojciech.wisniewski@xxxxx said:
> It seems that there is absolutely no support for exceptions with crunch,
> so usefullness of C++ compiler is questionable. I will try to talk to
> some binutils people.
I looked into this issue quickly. There has never been any support for
exceptions with crunch...
infocenter.arm.com/help/topic/com.arm.doc.ihi0038a/IHI0038A_ehabi.pdf
explains about the unwind process.
If you look in gcc/config/arm/unwind-arm.* you'll see that there is no
_UVRSC_MAVERICKCRUNCH so when an exception is thrown gcc doesn't know
what to do. This "may" be why my:
http://files.futaris.org/gcc/binutils-crunch.patch
isn't working correctly, and hence C++ exceptions don't work.
In summary, we'll have to modify:
gcc/config/arm/pr-support.c
gcc/config/arm/unwind-arm.h
gcc/config/arm/unwind-arm.c
I don't quite understand _Unwind_Reason_Code yet, but I'll try and read
up on some documentation (the above PDF?).
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