GNU gdb (GDB) 8.1 for the Amiga

After running the gcc 6 compiler for the Amiga, my Amiga toolchain seems to be quite usable and newlib starts to work as default, a debugger is still missing. It's time to deal with GDB for the Amiga.

Final Goal

Since I am using Eclipse cdt for Amiga C/C++ development I would like to have a working debugger in Eclipse. Eclipse suports gdb versions having the mi2 interface. This simplifies the decsion:

revive gdb 4.16
get a more recent version to work

gdb 4.16 does not support mi2 -> go for a recent version.
When I started to work in gdb it was GNU gdb (GDB) 8.1.50.20180312-git.

TODO List

To run GDB you need a working bfd package. If bfd is required, I wanted also updates to ld, as and the rest of the binutils.
For a convenient handling in Eclipse, I want a remote stub which loads the program into some kind of gdbserver matching the cross gdb binary.
Here's my TODO list:

bfd 2.30.51 -> DONE
m68k-amigaos-as 2.30.51 -> DONE
m68k-amigaos-ar 2.30.51 -> DONE
m68k-amigaos-ld 2.30.51 -> DONE
more binutils 2.30.51 -> DONE
remote rsh for the Amiga to start gdbserver -> DONE
Eclipse plugin to support AmigaOS Binaries -> DONE
patch for Eclipse to really use remote debugging -> DONE
some kind of gdbserver for the Amiga -> DONE
m68k-amigaos-gdb 8.1.50 -> DONE

Current state

Today I debugged the first Amiga C program remotely at C source level:

What's Working

So far working:

display asm
display c source
set/clear breakpoints
single step
continue
display registers

local variables and parameters are working now

Update

clean exit

It's not clean yet, but acceptable for me.

less (no?) seg faults of gdb on unsupported commands

This seems to be a cygwin issue, but I added some hacks.

Get it

You'll need

bgdbserver 0.4 for the Amiga

and m68k-amigaos-gdb

git clone https://github.com/bebbo/amiga-gcc
cd amiga-gcc
git checkout devel1
git pull
make update clean clean-prefix -j
make all

Use it

compile and link your programs with '-g'
copy your executable to the Amiga
- if you program is too large: a stripped version is ok for the Amiga
run on WinUAE (real Amiga should work too but you have to specife the ip address in target remote <ip>:<port>)
```
bgdbserver <program>
```

start gdb

m68k-amigaos-gdb <program>
target remote :2345

set breakpoints and continue

... there is still some work left, but it starts to be useful

rev: 1.16