mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2025-02-23 13:21:43 +08:00
PR record/29927 - reverse-finish requires two reverse next instructions to reach previous source line PowerPC uses two entry points called the local entry point (LEP) and the global entry point (GEP). Normally the LEP is used when calling a function. However, if the table of contents (TOC) value in register 2 is not valid the GEP is called to setup the TOC before execution continues at the LEP. When executing in reverse, the function finish_backward sets the break point at the alternate entry point (GEP). However if the forward execution enters via the normal entry point (LEP), the reverse execution never sees the break point at the GEP of the function. Reverse execution continues until the next break point is encountered or the end of the recorded log is reached causing gdb to stop at the wrong place. This patch adds a new address to struct execution_control_state to hold the address of the alternate function start address, known as the GEP on PowerPC. The finish_backwards function is updated. If the stopping point is between the two entry points (the LEP and GEP on PowerPC), the stepping range is set to execute back to the alternate entry point (GEP on PowerPC). Otherwise, a breakpoint is inserted at the normal entry point (LEP on PowerPC). Function process_event_stop_test checks uses a stepping range to stop execution in the caller at the first instruction of the source code line. Note, on systems that only support one entry point, the address of the two entry points are the same. Test finish-reverse-next.exp is updated to include tests for the reverse-finish command when the function is entered via the normal entry point (i.e. the LEP) and the alternate entry point (i.e. the GEP). The patch has been tested on X86 and PowerPC with no regressions. |
||
---|---|---|
bfd | ||
binutils | ||
config | ||
contrib | ||
cpu | ||
elfcpp | ||
etc | ||
gas | ||
gdb | ||
gdbserver | ||
gdbsupport | ||
gnulib | ||
gold | ||
gprof | ||
gprofng | ||
include | ||
intl | ||
ld | ||
libbacktrace | ||
libctf | ||
libdecnumber | ||
libiberty | ||
libsframe | ||
opcodes | ||
readline | ||
sim | ||
texinfo | ||
zlib | ||
.cvsignore | ||
.editorconfig | ||
.gitattributes | ||
.gitignore | ||
ar-lib | ||
ChangeLog | ||
compile | ||
config-ml.in | ||
config.guess | ||
config.rpath | ||
config.sub | ||
configure | ||
configure.ac | ||
COPYING | ||
COPYING3 | ||
COPYING3.LIB | ||
COPYING.LIB | ||
COPYING.LIBGLOSS | ||
COPYING.NEWLIB | ||
depcomp | ||
djunpack.bat | ||
install-sh | ||
libtool.m4 | ||
lt~obsolete.m4 | ||
ltgcc.m4 | ||
ltmain.sh | ||
ltoptions.m4 | ||
ltsugar.m4 | ||
ltversion.m4 | ||
MAINTAINERS | ||
Makefile.def | ||
Makefile.in | ||
Makefile.tpl | ||
makefile.vms | ||
missing | ||
mkdep | ||
mkinstalldirs | ||
move-if-change | ||
multilib.am | ||
README | ||
README-maintainer-mode | ||
setup.com | ||
src-release.sh | ||
symlink-tree | ||
test-driver | ||
ylwrap |
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.