Hi! I was speaking about gdb support in user mode, not the gdb stub in the kernel. Does someone use gdb to debug user space programs on linux-mips ? Maybe someone added the PTRACE_SINGLESTEP command of the ptrace syscall in recent mips kernel, but I do not have it in my kernel (linux-2.4.0 on sgi site). I patched gdb 5.0 so that single step on mips is correctly supported in user mode. I also modified gdbserver so that it works when you debug mips code in user mode. Fabrice. On Tue, 24 Apr 2001, Ian Soanes wrote: > Ian Soanes wrote: > > > > Ralf Baechle wrote: > > > > > > On Mon, Apr 23, 2001 at 06:31:20PM +0200, Fabrice Bellard wrote: > > > > > > > Did someone make a patch so that gdb can do single step on mips-linux ? If > > > > not, do you prefer a patch to gdb or a patch in the kernel to support the > > > > PTRACE_SINGLESTEP command ? > > > > > > Last I used GDB single stepping has been working fine for me, so I wonder > > > what is broken? > > > > > <snip> > > > > > 2/ Previously I've had some luck single stepping kernel and module code > > with the kernel gdbstub (arch/mips/kernel/gdb-stub.c), so I ported the > > relevant single stepping code into gdbserver. The results were much > > better. The only thing that seems to be wrong now is stepping over > > function calls isn't working quite right. I can step into functions OK > > though. > > > > <snip> > > Hi, > > Sorry, I made a mistake (forgetting to clear a breakpoint) when I ported > the stub single step code into gdbserver. As far as I can tell, single > stepping works fine now. > > BTW, should I be worried about MIPS16 instructions? (single step > breakpoints are always placed on a 4 byte increment) ...or is that a > silly question? > > Best regards, > Ian >
