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I recently see some gdb.server/*.exp fails in my native gdb testing, in which libexpat isn't available, so GDB isn't able to parse xml file. It causes gdb.server/ tests fails because GDB can't get registers correctly from GDBserver. (gdb) PASS: gdb.server/connect-without-multi-process.exp: multiprocess=off: break main target remote localhost:2352^M Remote debugging using localhost:2352^M warning: Can not parse XML target description; XML support was disabled at compile time^M Reading /lib/ld-linux-armhf.so.3 from remote target...^M warning: File transfers from remote targets can be slow. Use "set sysroot" to access files locally instead.^M Reading /lib/ld-linux-armhf.so.3 from remote target...^M Reading symbols from target:/lib/ld-linux-armhf.so.3...Reading /lib/ld-2.17.so.debug from remote target...^M Reading /lib/.debug/ld-2.17.so.debug from remote target...^M (no debugging symbols found)...done.^M Remote 'g' packet reply is too long: 0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000efffbe00000000808d0f4d100000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000^ 0x4d0f8d80 in _start () from target:/lib/ld-linux-armhf.so.3^M Without XML support in GDB, it can't parse xml sent by GDBserver, and has to fall back to the oldest arch. However, GDBserver doesn't know this (IMO, this is a defect in RSP), and still choose the right target description to create regcache and 'g' packet. If the port only has one target description or coincidentally two sides choose the same target description, there is no such issue. Otherwise, GDB is broken on read registers. This patch is to skip gdbserver tests if XML is not support and the target has multiple target descriptions. gdb/testsuite: 2016-07-21 Yao Qi <yao.qi@linaro.org> * lib/gdbserver-support.exp (skip_gdbserver_tests): Return 1 if gdb_skip_xml_test is true on some targets.
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.