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This patch implements the .cfi_negate_ra_state to be consistent with LLVM (https://reviews.llvm.org/D50136). The relevant DWARF code DW_CFA_AARCH64_negate_ra_state is multiplexed on top of DW_CFA_GNU_window_save, as per https://gcc.gnu.org/ml/gcc-patches/2017-08/msg00753.html I believe this is the simplest patch implementing this and is needed to allow users to build, for example, the Linux kernel with Armv8.3-A pointer authentication support with Clang while using gas as the assembler, which is a common usecase. gas/ 2019-12-06 Kyrylo Tkachov <kyrylo.tkachov@arm.com> * dw2gencfi.c (cfi_pseudo_table): Add cfi_negate_ra_state. * testsuite/gas/aarch64/pac_negate_ra_state.s: New file. * testsuite/gas/aarch64/pac_negate_ra_state.d: Likewise.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.