unwind: Allow the building of libunwind for MIPS.
authorVasileios Kalintiris <Vasileios.Kalintiris@imgtec.com>
Sat, 26 Sep 2015 18:26:01 +0000 (18:26 +0000)
committerVasileios Kalintiris <Vasileios.Kalintiris@imgtec.com>
Sat, 26 Sep 2015 18:26:01 +0000 (18:26 +0000)
commit8518eb54f3aa48130307563a2bf7f23493e63fca
treedce428a3d6de447c3d7371c4c116939c248de2ce
parent91717ee2333a22575058d9ed34bf2f9a8aa48ce5
unwind: Allow the building of libunwind for MIPS.

Summary:
Currently, libunwind doesn't support MIPS. However, with this patch
we do allow the library to build, and we warn the user about the lack of
support for MIPS. Also, the dummy unw_getcontext() implementation for MIPS just
traps on function entry in order to avoid any confusion with silent/weird
failures at runtime.

This allows us to test an LLVM-based toolchain without the dependency on a
GCC toolchain. Of course, C++ exception handling and other things that depend
on stack unwinding will not work until we add a proper implementation of the
stub functions.

Reviewers: compnerd, logan

Subscribers: dsanders, llvm-commits

Differential Revision: http://reviews.llvm.org/D13160

llvm-svn: 248673
libunwind/src/UnwindRegistersSave.S
libunwind/src/config.h
libunwind/src/libunwind.cpp