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Richard Earnshaw d8147d7053 arm: correctly decode Tag_THUMB_ISA_use=3 for thumb2 features
This was detected when a user accidentally tried to build a shared
library using armv8-m.main objects.  The resulting error was "warning:
thumb-1 mode PLT generation not currently supported".  Something was
clearly wrong because v8-m.main is a thumb-2 variant.

It turns out that the code to detect thumb-2 in object files hadn't
been updated for the extended definition of Tag_THUMB_ISA_use to
support the value 3, meaning 'work it out for yourself from the
architecture tag'; something that is now necessary given that the line
between thumb-1 and thumb-2 has become blurred over time.

Another problem with the function doing this calculation was that the
absence of this tag (implying a default value 0) should mean use of
thumb code was NOT permitted.  However, the code went on to look at
the architecture flags and decide that it could ignore this if the
architecture flags said that thumb2 features were available, thus
completely ignoring the intended meaning.

bfd/

	* elf32-arm.c (using_thumb2): Correctly handle Tag_THUMB_ISA_use
	values 0 and 3.
2021-05-11 16:18:25 +01:00
bfd arm: correctly decode Tag_THUMB_ISA_use=3 for thumb2 features 2021-05-11 16:18:25 +01:00
binutils dwarf.c (process_abbrev_set): Properly parenthesize, fix fallout 2021-05-11 16:26:30 +02:00
config GCC_CET_HOST_FLAGS: Check if host supports multi-byte NOPs 2021-03-18 08:02:46 -07:00
contrib Import mklog.py from gcc repo 2020-09-25 10:24:44 -04:00
cpu or1k: Implement relocation R_OR1K_GOT_AHI16 for gotha() 2021-05-06 20:51:24 +09:00
elfcpp Add DWARF 5 support in gold. 2021-03-19 13:55:35 -07:00
etc Update year range in copyright notice of binutils files 2021-01-01 10:31:05 +10:30
gas Report illegal Z80 load instructions. 2021-05-11 10:57:04 +01:00
gdb [gdb/testsuite] Update infrun regexp in gdb.base/watch_thread_num.exp 2021-05-11 14:22:11 +02:00
gdbserver gdb, gdbserver: make status_to_str return std::string 2021-05-08 21:07:20 -04:00
gdbsupport gdbsupport: re-generate configure & friends 2021-05-08 21:27:49 -04:00
gnulib gnulib: import gendocs 2021-05-04 13:50:33 -04:00
gold PR27625, powerpc64 gold __tls_get_addr calls 2021-03-30 13:38:41 +10:30
gprof support generating multi-html pages in parallel 2021-05-08 12:06:07 -04:00
include Fix .dwsect generation for XCOFF. Handle .function generated with DWARF on XCOFF. 2021-05-07 15:29:49 +01:00
intl intl: turn LIBINTL into -L / -l form 2021-02-10 15:26:57 +00:00
ld Prevent libdel.dll.a from being installed on Windows based systems. 2021-05-11 11:06:53 +01:00
libctf Use htab_eq_string in libctf 2021-05-09 12:28:32 +09:30
libdecnumber
libiberty libiberty: add htab_eq_string 2021-05-07 11:17:11 +01:00
opcodes Fix an illegal memory access when attempting to disassemble a corrupt TIC30 binary. 2021-05-11 11:29:58 +01:00
readline Fix Readline 8.1 build on mingw 2021-03-02 13:42:37 -07:00
sim sim: h8300: clean up various warnings 2021-05-08 12:43:06 -04:00
texinfo
zlib GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
.cvsignore
.gitattributes
.gitignore Add gnu global outputs to .gitignore 2020-12-02 10:00:27 -05:00
ar-lib
ChangeLog Replace AC_PROG_CC with AC_PROG_CC_C99 in top level configure file. 2021-05-04 13:40:34 +01:00
compile
config-ml.in
config.guess Update config.sub and config.guess 2021-01-05 15:55:59 +10:30
config.rpath
config.sub config.sub update broke powerpc-eabivle 2021-01-07 08:56:28 +10:30
configure Replace AC_PROG_CC with AC_PROG_CC_C99 in top level configure file. 2021-05-04 13:40:34 +01:00
configure.ac Replace AC_PROG_CC with AC_PROG_CC_C99 in top level configure file. 2021-05-04 13:40:34 +01:00
COPYING
COPYING3
COPYING3.LIB
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
depcomp
djunpack.bat
install-sh
libtool.m4 GCC: Check if AR works with --plugin and rc 2021-01-11 16:26:51 -08:00
lt~obsolete.m4
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
MAINTAINERS
Makefile.def Add install dependencies for ld -> bfd and libctf -> bfd 2021-03-18 12:40:40 +00:00
Makefile.in Add install dependencies for ld -> bfd and libctf -> bfd 2021-03-18 12:40:40 +00:00
Makefile.tpl Add missing changes to Makefile.tpl 2021-02-28 04:39:38 -08:00
makefile.vms
missing
mkdep
mkinstalldirs
move-if-change
multilib.am
README
README-maintainer-mode
setup.com
src-release.sh src-release: fix indentation 2021-01-12 18:19:20 -05:00
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.