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In installing minimal symbols for ELF shared library trampolines we "forget" to make individual symbols special where required. This leads to problems on the MIPS target using microMIPS SVR4 lazy stubs. Lacking the special annotation these stubs are treated as standard MIPS code and this makes GDB insert the wrong software breakpoint instruction, breaking e.g. single-stepping through these stubs. This is not a very frequent scenario as microMIPS SVR4 lazy stubs are typically only used in shared libraries with the main executable using PLT, handled elsewhere. Still it triggers e.g. when a software watchpoint has been installed. The symptom is SIGILL or the program going astray, depending on the endianness. Disassembly of these stubs is also wrong. * elfread.c (elf_symtab_read): Also mark solib trampoline minimal symbols special.
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.