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Re: ARM Linux EABI: unwinding through a segfault handler

From: "Joseph S. Myers" <joseph at codesourcery dot com>
To: Daniel Jacobowitz <drow at false dot org>
Cc: Ken Werner <ken dot werner at linaro dot org>, Andrew Haley <aph at redhat dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Tue, 30 Aug 2011 15:28:05 +0000 (UTC)
Subject: Re: ARM Linux EABI: unwinding through a segfault handler
References: <4E563F58.2060006@redhat.com> <4E5BADCC.4060809@linaro.org> <CAN9gPaHOOuNmNwN04jx5CkFNwPUiwjn9R_1H=XLJ06T3fMnYKw@mail.gmail.com>

On Mon, 29 Aug 2011, Daniel Jacobowitz wrote:

> I thought we used a handler in GLIBC that was properly annotated,
> nowadays, but I might be mistaken.

What we have in GLIBC is 
ports/sysdeps/unix/sysv/linux/arm/eabi/sigrestorer.S.  Note that 
sigaction.c has to check the kernel version to determine which function to 
use because 2.6.18 changed the signal frame layout, not realising that it 
was part of the userspace ABI.

-- 
Joseph S. Myers
joseph@codesourcery.com

References:
- ARM Linux EABI: unwinding through a segfault handler
  - From: Andrew Haley
- Re: ARM Linux EABI: unwinding through a segfault handler
  - From: Ken Werner
- Re: ARM Linux EABI: unwinding through a segfault handler
  - From: Daniel Jacobowitz

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