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Yao Qi 92fa70b0bd Step over fork/vfork syscall insn in gdbserver
We can also extend disp-step-syscall.exp to test GDBserver step over
breakpoint on syscall instruction.  That is, we set a breakpoint
with a false condition on syscall instruction, so that GDBserver will
step over it.

This test triggers a GDBserver internal error, which can be fixed by
this series.

(gdb) PASS: gdb.base/disp-step-syscall.exp: fork: break cond on target: break on syscall insns
continue^M
Continuing.^M
Remote connection closed^M
(gdb) FAIL: gdb.base/disp-step-syscall.exp: fork: break cond on target: continue to fork again

In GDBserver, there is an internal error,

/home/yao/SourceCode/gnu/gdb/git/gdb/gdbserver/linux-low.c:1922: A problem internal to GDBserver has been detected.
unsuspend LWP 25554, suspended=-1

the simplified reproducer is like,

$ ./gdb ./testsuite/outputs/gdb.base/disp-step-syscall/disp-step-fork
(gdb) b main
(gdb) c
(gdb) disassemble fork // in order to find the address of insn 'syscall'
....
   0x00007ffff7ad6023 <+179>:	syscall
(gdb) b *0x00007ffff7ad6023 if main == 0
(gdb) c

gdb/testsuite:

2016-03-03  Yao Qi  <yao.qi@linaro.org>

	* gdb.base/disp-step-syscall.exp (break_cond_on_syscall): New.
	If target supports condition evaluation on target, invoke
	break_cond_on_syscall for fork and vfork.
2016-03-03 09:17:44 +00:00
bfd Automatic date update in version.in 2016-03-03 00:00:18 +00:00
binutils Add ChangeLog entries for PR ld/19645 2016-02-26 06:44:03 -08:00
config Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
cpu Correct fr30 comment 2016-03-03 12:55:30 +10:30
elfcpp Remove typename from Mips64_rela_data 2016-01-12 12:08:06 -08:00
etc
gas Adjust testsuite/gas/i386/x86_64-intel.d for COFF 2016-03-02 05:15:32 -08:00
gdb Step over fork/vfork syscall insn in gdbserver 2016-03-03 09:17:44 +00:00
gold Discard FDEs for zero-length address ranges. 2016-02-26 07:53:20 -08:00
gprof Regen configure 2016-01-17 12:28:14 +10:30
include Add ChangeLog entries for PR ld/19645 2016-02-26 06:44:03 -08:00
intl Regen intl/configure 2015-08-31 12:53:36 +09:30
ld Skip ld-elf/pr19162.d for hppa-*-* 2016-03-02 19:07:01 -08:00
libdecnumber Remove leading/trailing white spaces in ChangeLog 2015-07-24 04:16:47 -07:00
libiberty Sync libiberty with GCC. 2016-01-28 21:44:42 +01:00
opcodes Regenerate or1k opcodes file 2016-03-03 00:23:31 +10:30
readline Revert "Sync readline/ to version 7.0 alpha" 2015-07-25 15:57:00 -04:00
sim sim: mips: fix prog_bfd usage 2016-02-05 20:27:25 -05:00
texinfo
zlib Import zlib 1.2.8 with local change merged in. 2015-11-25 15:14:47 -08:00
.cvsignore
.gitattributes Add a .gitattributes file for use with git-merge-changelog 2014-07-25 18:07:23 -04:00
.gitignore Import changes made to files shared with the FSF GCC project. 2016-01-11 11:06:56 +00:00
ChangeLog Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
compile Update from upstream Automake 2014-11-16 13:43:48 +01:00
config-ml.in Sync toplevel files with GCC 2015-07-27 07:49:05 -07:00
config.guess Import changes made to files shared with the FSF GCC project. 2016-01-11 11:06:56 +00:00
config.rpath
config.sub Import changes made to files shared with the FSF GCC project. 2016-01-11 11:06:56 +00:00
configure Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
configure.ac Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
COPYING
COPYING.LIB
COPYING.LIBGLOSS
COPYING.NEWLIB
COPYING3
COPYING3.LIB
depcomp Update from upstream Automake 2014-11-16 13:43:48 +01:00
djunpack.bat
install-sh Update from upstream Automake 2014-11-16 13:43:48 +01:00
libtool.m4 Sync top-level btool.m4 with GCC 2016-01-12 08:44:52 -08:00
ltgcc.m4
ltmain.sh
ltoptions.m4
ltsugar.m4
ltversion.m4
lt~obsolete.m4
MAINTAINERS Update description of ownership of files in include/ 2014-11-04 16:14:14 -08:00
Makefile.def Sync top-level Makefile.def with GCC 2016-01-12 08:34:40 -08:00
Makefile.in Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
Makefile.tpl Sync top level files with gcc. 2016-02-10 10:54:29 +00:00
makefile.vms
missing Update from upstream Automake 2014-11-16 13:43:48 +01:00
mkdep
mkinstalldirs Update from upstream Automake 2014-11-16 13:43:48 +01:00
move-if-change Update `move-if-change' from gnulib 2014-11-16 17:04:02 +01:00
README
README-maintainer-mode
setup.com
src-release.sh fix gdb version parsing in src-release.sh 2016-01-17 10:01:55 +04:00
symlink-tree
ylwrap Update from upstream Automake 2014-11-16 13:43:48 +01:00

		   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.