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README
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2024 Current State by crt0
Writing/Reading variables, memory, registers (only as 32bit), call stack - works.
Example usage: run sample with ps2link:
ps2client -h 192.168.1.13 execee host:testgdb.elf
in nanother terminal
mips64r5900el-ps2-elf-gdb -x ps2.sh
TODO: rewrite metwork stack
INTRODUCTION
----------------------------------------------------------------------------
ps2gdbStub is a tcp stub for the gnu debugger. It could be easily changed
to not use tcp. The low level portion reads 128 bits for the 32 gprs and
also for lo and hi, although these are converted down to 32 bits before
sending to the remote GDB.
Currently, the code *must* be uploaded via pukklink or ps2link. Naplink
won't do it!
As for building the remote GDB, I configured gdb as mips-idt-elf and hacked
about with it a bit. I managed to get the latest weekly snapshot (which at
time of writing was gdb+dejagnu-20030801.tar.bz2) to work, after some hacking
around. I've included a .cmd file for use with the remote GDB. You'll need
to change the target line with the correct IP of your ps2. To invoke, from
the shell, type <gdb -x ps2.cmd>
With reference to the frame pointer, gpr $30 should be the frame pointer,
this is what the MIPS abi says anyway. However, our toolchain appears to use
grp $30 as another saved register (s8), so I just report the fp to be the
same as the sp at the moment.
COPYRIGHT FOR PS2GDBSTUB
----------------------------------------------------------------------------
Copyright (c) 2003 Ray Donnelly ([email protected])
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
1. Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
2. The author grants you a license to use ps2gdbStub for academic, research
and non-commercial purposes only.
3. The author imposes no restriction on any code developed using the
software. However, the author retains a non-exclusive royalty-free
license to any modification to the distribution made by the licensee.
4. Any Licensee wishing to make commercial use of the Softare must
contact the author to execute the appropriate license for such
commercial use. Commercial use includes
- Integration of all or part of the source code into a product for sale
or commercial license by or on behalf Licensee to third parties, or
- distribution of the binary code or source code to third parites that
need it to utilize a commercial product sold or licensed by or on
behalf of Licensee.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
THE POSSIBILITY OF SUCH DAMAGE.