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Unknown instructions are currently just dumped as .long 1234. On S/390 we can do a bit better since the instruction length is encoded in the opcode. That way also unknown instructions can be skipped according to their real length. That way we can continue correctly after that instruction. However, there are also some drawbacks with that behavior when dumping data. So for now that behavior is only enabled for text section but even there it might mess things up when having a literal pool embedded in the code. Therefore I've left the feature disabled by default and have added the -Minsnlength option to enable it explicitely. opcodes/ChangeLog: 2016-06-10 Andreas Krebbel <krebbel@linux.vnet.ibm.com> * s390-dis.c (option_use_insn_len_bits_p): New file scope variable. (init_disasm): Handle new command line option "insnlength". (print_s390_disassembler_options): Mention new option in help output. (print_insn_s390): Use the encoded insn length when dumping unknown instructions.
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.