Binutils with MCST patches
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Jan Beulich c006a730e9 x86: improve handling of insns with ambiguous operand sizes
Commit b76bc5d54e ("x86: don't default variable shift count insns to
8-bit operand size") pointed out a very bad case, but the underlying
problem is, as mentioned on various occasions, much larger: Silently
selecting a (nowhere documented afaict) certain default operand size
when there's no "sizing" suffix and no suitable register operand(s) is
simply dangerous (for the programmer to make mistakes).

While in Intel syntax mode such mistakes already lead to an error (which
is going to remain that way), AT&T syntax mode now gains warnings in
such cases by default, which can be suppressed or promoted to an error
if so desired by the programmer. Furthermore at least general purpose
insns now consistently have a default applied (alongside the warning
emission), rather than accepting some and refusing others.

No warnings are (as before) to be generated for "DefaultSize" insns as
well as ones acting on selector and other fixed-width values. For
SYSRET, however, the DefaultSize needs to be dropped - it had been
wrongly put there in the first place, as it's unrelated to .code16gcc
(no stack accesses involved).

As set forth as a prereq when I first mentioned this intended change a
few years back, Linux as well as gcc have meanwhile been patched to
avoid (emission of) ambiguous operands (and hence triggering of the new
warning).

Note that I think that in 64-bit mode IRET and far RET would better get
a diagnostic too, as it's reasonably likely that a suffix-less instance
really is meant to be a 64-bit one. But I guess I better make this a
separate follow-on patch.

Note further that floating point operations with integer operands are an
exception for now: They continue to use short (16-bit) operands by
default even in 32- and 64-bit modes.

Finally note that while {,V}PCMPESTR{I,M} would, strictly speaking, also
need to be diagnosed, with their 64-bit forms not being very useful I
think it is better to continue to avoid warning about them (by way of
them carrying IgnoreSize attributes).
2020-01-21 08:28:25 +01:00
bfd Automatic date update in version.in 2020-01-21 00:00:33 +00:00
binutils Updated translations for various binutils sub-directories 2020-01-20 15:10:23 +00:00
config Add markers for 2.34 branch to the NEWS files and ChangeLogs. 2020-01-18 13:50:25 +00:00
contrib contrib: Update dg-extract-results.* from gcc 2019-10-21 15:26:48 +01:00
cpu Add markers for 2.34 branch to the NEWS files and ChangeLogs. 2020-01-18 13:50:25 +00:00
elfcpp Add markers for 2.34 branch to the NEWS files and ChangeLogs. 2020-01-18 13:50:25 +00:00
etc texi2pod.pl: import support for @t{...} from gcc 2020-01-15 12:58:09 -05:00
gas x86: improve handling of insns with ambiguous operand sizes 2020-01-21 08:28:25 +01:00
gdb sim: don't rely on inferior_ptid in gdbsim_target::wait 2020-01-19 19:48:16 -05:00
gdbsupport Fix gdbsupport build on compilers that don't default to C++11 or above 2020-01-17 15:19:42 +00:00
gnulib Update copyright year range in all GDB files. 2020-01-01 10:20:53 +04:00
gold Updated translations for various binutils sub-directories 2020-01-20 15:10:23 +00:00
gprof Updated translations for various binutils sub-directories 2020-01-20 15:10:23 +00:00
include Add markers for 2.34 branch to the NEWS files and ChangeLogs. 2020-01-18 13:50:25 +00:00
intl
ld Updated translations for various binutils sub-directories 2020-01-20 15:10:23 +00:00
libctf Add markers for 2.34 branch to the NEWS files and ChangeLogs. 2020-01-18 13:50:25 +00:00
libdecnumber
libiberty Fix a libiberty testsuite failure. 2020-01-17 15:56:55 +00:00
opcodes x86: improve handling of insns with ambiguous operand sizes 2020-01-21 08:28:25 +01:00
readline Fix compilation of Readline on mingw.org's MinGW 2019-12-23 16:28:32 +02:00
sim sim: add some stdlib.h includes 2020-01-19 19:48:16 -05:00
texinfo
zlib
.cvsignore
.gitattributes
.gitignore Add profiling outputs to .gitignore 2019-12-26 06:54:58 +01:00
ar-lib
ChangeLog sim: don't rely on inferior_ptid in gdbsim_target::wait 2020-01-19 19:48:16 -05:00
compile
config-ml.in
config.guess Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
config.rpath
config.sub Update top level config files with copies from the official repository. 2020-01-18 13:43:19 +00:00
configure Move gdbsupport to the top level 2020-01-14 16:25:02 -07:00
configure.ac Move gdbsupport to the top level 2020-01-14 16:25:02 -07:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS Move gdbsupport to the top level 2020-01-14 16:25:02 -07:00
Makefile.def Make all-gdbsupport depend on all-bfd 2020-01-17 13:40:21 -05:00
Makefile.in Make all-gdbsupport depend on all-bfd 2020-01-17 13:40:21 -05:00
Makefile.tpl Revert "Sync top level files with versions from gcc." 2019-05-30 11:17:19 +01:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
README-maintainer-mode
setup.com
src-release.sh Move gdbsupport to the top level 2020-01-14 16:25:02 -07:00
symlink-tree
test-driver
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.