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The disassembler for Arm has some aborts in it in places it assumes can never be reached. Under normal circumstances they indeed cannot be reached because the right options are selected from the ARM attributes in the ELF file. However when disassembling with -b binary then if you do not get the options right the disassembler just aborts. This changes it so it just prints how it was trying to interpret the instruction and prints UNKNOWN instructions next to it. This way the user has an idea of what's going. gas/ChangeLog: * testsuite/gas/arm/undefined-insn-arm.d: New test. * testsuite/gas/arm/undefined-insn-thumb.d: New test. * testsuite/gas/arm/undefined-insn.s: New test. opcodes/ChangeLog: * arm-dis.c (UNKNOWN_INSTRUCTION_32BIT): Format specifier for arm mode. (UNKNOWN_INSTRUCTION_16BIT): Format specifier for thumb mode. (print_insn_arm, print_insn_thumb16, print_insn_thumb32): Use them.
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.