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Re: [Libunwind-devel] libunwind ARM port

From: David Mosberger-Tang
Subject: Re: [Libunwind-devel] libunwind ARM port
Date: Mon, 4 Feb 2008 17:35:17 -0700


When I try to build libunwind for ARM in my cross-environment, I get this error:

../../libunwind/src/mi/backtrace.c:41: error: 'mcontext_t' has no
member named 'arm_r0'

I'm using the cross-tools available here:

(look for "Linux Crosstool gcc-4.0.1-glibc-2.3.5").  I'm not terribly
familiar with ARM.  Are these crosstools just obsolete or are there
multiple common ways of defining mcontext_t on ARM?  As far as I can
see, the toolchain I'm using simply defines mcontext_t as an
array of integer and fp-registers (as is commonly done by the Linux kernel).


On 1/25/08, Daniel Jacobowitz <address@hidden> wrote:
> On Wed, Jan 23, 2008 at 04:25:17PM -0500, Daniel Jacobowitz wrote:
> > 0.98.5 is the latest release, but it appears to be much older than the
> > current GIT version... I've got some rebasing to do.
> Done, as attached.  This works on ARM (including Thumb), MIPS, and
> MIPS64; it does not appear to break anything on x86_64.  I cleaned up
> a lot of the rough edges, including all of those outside of the ARM
> and MIPS specific files.  As last time, rerun autotools after applying.
> The .debug_frame support is only present for local unwinding at
> present, but it could be added to the ptrace support too if someone
> wants to take the effort.  I used UNW_INFO_FORMAT_TABLE for
> .debug_frame; .eh_frame is UNW_INFO_FORMAT_REMOTE_TABLE.
> Is the testsuite supposed to have clean results?  I ran it on x86 and
> x86_64 and got 12 failures on x86, 7 on x86_64.  I didn't implement
> enough ptrace / signal bits to try the testsuite on ARM or MIPS yet.
> --
> Daniel Jacobowitz
> CodeSourcery
> _______________________________________________
> Libunwind-devel mailing list
> address@hidden

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