binutils-gdb modified for the FreeChainXenon project
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Luis Machado a01567f4f7 Enable ARMv8.1-m PACBTI support
This set of changes enable support for the ARMv8.1-m PACBTI extensions [1].

The goal of the PACBTI extensions is similar in scope to that of a-profile
PAC/BTI (aarch64 only), but the underlying implementation is different.

One important difference is that the pointer authentication code is stored
in a separate register, thus we don't need to mask/unmask the return address
from a function in order to produce a correct backtrace.

The patch introduces the following modifications:

- Extend the prologue analyser for 32-bit ARM to handle some instructions
from ARMv8.1-m PACBTI: pac, aut, pacg, autg and bti. Also keep track of
return address signing/authentication instructions.

- Adds code to identify object file attributes that indicate the presence of
ARMv8.1-m PACBTI (Tag_PAC_extension, Tag_BTI_extension, Tag_PACRET_use and
Tag_BTI_use).

- Adds support for DWARF pseudo-register RA_AUTH_CODE, as described in the
aadwarf32 [2].

- Extends the dwarf unwinder to track the value of RA_AUTH_CODE.

- Decorates backtraces with the "[PAC]" identifier when a frame has signed
the return address.

- Makes GDB aware of a new XML feature "org.gnu.gdb.arm.m-profile-pacbti". This
feature is not included as an XML file on GDB's side because it is only
supported for bare metal targets.

- Additional documentation.

[1] https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/armv8-1-m-pointer-authentication-and-branch-target-identification-extension
[2] https://github.com/ARM-software/abi-aa/blob/main/aadwarf32/aadwarf32.rst
2022-04-06 13:43:46 +01:00
bfd Automatic date update in version.in 2022-04-06 00:00:09 +00:00
binutils objdump/opcodes: add syntax highlighting to disassembler output 2022-04-04 13:10:52 +01:00
config Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
contrib Import mklog.py from gcc repo 2020-09-25 10:24:44 -04:00
cpu Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
elfcpp Add markers for 2.38 branch 2022-01-22 12:08:55 +00:00
etc Update year range in copyright notice of binutils files 2022-01-02 12:04:28 +10:30
gas gas: copy st_size only if unset 2022-04-04 08:43:50 -07:00
gdb Enable ARMv8.1-m PACBTI support 2022-04-06 13:43:46 +01:00
gdbserver gdbserver: report correct status in thread stop race condition 2022-04-04 22:11:53 -04:00
gdbsupport Consolidate definition of current_directory 2022-03-30 09:08:48 -06:00
gnulib Automatic Copyright Year update after running gdb/copyright.py 2022-01-01 19:13:23 +04:00
gold Updated Serbian translations for the bfd, gold, ld and opcodes directories 2022-02-17 15:18:59 +00:00
gprof libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
gprofng libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
include objdump/opcodes: add syntax highlighting to disassembler output 2022-04-04 13:10:52 +01:00
intl Regenerate a couple of files 2021-11-15 12:20:12 +10:30
ld libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
libbacktrace libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
libctf libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
libdecnumber Run autoreconf -vf throughout 2020-07-29 16:03:55 -04:00
libiberty gdb: rename floatformats_ia64_quad to floatformats_ieee_quad 2022-04-02 08:36:33 +08:00
opcodes opcodes/i386: partially implement disassembler style support 2022-04-04 13:10:52 +01:00
readline Update config.sub and config.guess for MIPS R3 and R5 ISA support 2021-05-24 18:11:49 +02:00
sim sim: fixes for libopcodes styled disassembler 2022-04-04 22:41:24 +01:00
texinfo
zlib libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
.cvsignore
.editorconfig Add top-level .editorconfig file 2022-01-28 08:25:42 -05:00
.gitattributes
.gitignore Add gnu global outputs to .gitignore 2020-12-02 10:00:27 -05:00
ar-lib Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ChangeLog gprofng: avoid using `fallthrough' attributes 2022-03-15 21:04:57 +01:00
compile
config-ml.in
config.guess Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
config.rpath
config.sub Update the config.guess and config.sub files from the master repository and regenerate files. 2022-01-17 16:21:22 +00:00
configure gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
configure.ac gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
COPYING3
COPYING3.LIB
depcomp
djunpack.bat
install-sh
libtool.m4 libtool.m4: fix the NM="/nm/over/here -B/option/with/path" case 2022-03-25 12:02:35 +00:00
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS MAINTAINERS: Update path to readline config.{sub,guess} files 2021-05-24 18:11:49 +02:00
Makefile.def gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
Makefile.in gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
Makefile.tpl Sync Makefile.tpl with GCC 2021-11-13 09:04:03 -08:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am Merge autoconf / automake update changes from GCC. 2018-10-31 17:10:56 +00:00
README
README-maintainer-mode Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
setup.com
src-release.sh gprofng: a new GNU profiler 2022-03-11 08:58:31 +00:00
symlink-tree
test-driver Bump to autoconf 2.69 and automake 1.15.1 2018-06-19 16:55:06 -04:00
ylwrap

		   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.