Hi,

I tried to use oskit-mach instead of gnumach. With following things I
have (had) my problems (on linux):


* oskit-mach could only compiled when oskit was installed in the way
oskit-mach expected it. First I installed oskit in /usr/local/ and
started the configure script from oskit-mach. 
Unfortunately oskit-mach couldn't detected the libraries, though the 
PATH were setted (/etc/ld.so.conf and LD_LIBRARY_PATH). 
Therefore in the Makefile was 'OSKIT_LIBDIR = oskit'
Calling configure this way helped:  

      OSKIT_LIBDIR=/usr/local/lib/oskit ../../oskit-mach/configure 

It may be a good idea to mention this in the README file. Since if it is
not setted correctly make says:
 
      make: *** No rule to make target `kernel', needed by `all'.  Stop.

which have many others reported and didn't know how this was triggered. 
After this it compiles nicely through up to the linking:

      gcc -O  -nostdlib -nostartfiles  -r -o kernel.o \
      -Wl,-\( /usr/local/lib/oskit/multiboot.o ipc_entry.o ipc_hash.o
      ipc_init.o ipc_kmsg.o ipc_marequest.o ipc_mqueue.o ipc_notify.o
      ipc_object.o ipc_port.o ipc_pset.o ipc_right.o ipc_space.o
      ipc_splay.o ipc_table.o ipc_target.o ipc_thread.o mach_msg.o
      mach_port.o mach_rpc.o mach_debug.o fipc.o act.o ast.o bootstrap.o
      counters.o eventcount.o exception.o host.o ipc_host.o
      ipc_kobject.o ipc_mig.o ipc_sched.o ipc_tt.o kalloc.o lock.o
      lock_mon.o mach_clock.o mach_factor.o machine.o pc_sample.o
      priority.o processor.o profile.o queue.o sched_prim.o startup.o
      strings.o syscall_emulation.o syscall_subr.o syscall_sw.o task.o
      thread.o thread_swap.o time_stamp.o timer.o zalloc.o vm_debug.o
      vm_external.o vm_fault.o vm_init.o vm_kern.o vm_map.o vm_object.o
      vm_pageout.o vm_resident.o vm_user.o memory_object.o device_init.o
      dev_pager.o net_io.o osenv_mem.o osenv_log.o osenv_irq.o
      osenv_sleep.o osenv_synch.o osenv_timer.o osenv_bell.o main.o
      ds_osenv.o ds_request.o ds_routines.o kmsg.o ds_block.o
      ds_partition.o ds_mem.o ds_bus.o ds_net.o ds_stream.o ds_asyncio.o
      smp-glue.o version.o memory_object_user_user.o
      memory_object_default_user.o memory_object_reply_user.o
      device_reply_user.o device_error_reply_user.o device_server.o
      device_pager_server.o mach_port_server.o mach_server.o
      mach4_server.o mach_debug_server.o mach_host_server.o int_init.o
      pic_isa.o ast_check.o fpu.o gdt.o idt.o ldt.o mp_desc.o pcb.o
      phys.o pic.o pit.o trap.o user_ldt.o hardclock.o pmap.o
      read_fault.o interrupt.o cswitch.o idt_inittab.o locore.o spl.o
      mach_i386_server.o -loskit_kern -loskit_lmm -loskit_com
      -loskit_smp -loskit_exec -loskit_unsupp -loskit_dev
      -loskit_linux_dev -loskit_diskpart  -Wl,-\) -lgcc
      /usr/bin/ld: cannot find -loskit_kern
      collect2: ld returned 1 exit status
      make: *** [kernel.o] Error 1
      
Adding '-L/usr/local/lib' to OSKIT_LIBS in the Makefile fixed this error. 
I'm not sure why the linker couldn't find the oskit libraries since all 
environment values are pointing to /usr/local/lib.

The '--with-debug' flag is not supported. I had to add '-g' in the
Makefile in order to get debugging symbols. 


* I load the oskit-mach kernel over the local net on a different machine 
started it. The kernel hangs when it tries to detect the partition
tables:
  
      ide0 at 0x1f0-0x1f7,0x3f6 on irq 14
      hda: Maxtor 90871U2, 8297MB w/512kB Cache, CHS=1057/255/63
      Partition check:
       hda:

To be sure oskit itselfs works I tried a example kernel (linux_fs_com)
which tests the filesystem. This kernel runs without hanging. 
I still investigated the problem but I'd like to know if someone else
had the same problem?


* When the oskit-mach kernel all kernel messages are written like this

      hda: IRQ probe failed (0)
                              hdb: IRQ probe failed (0)
			                              hdb: IRQ probe
      failed (0)

It was quite difficult to read the output, therefore I searched what it
causes. I found that in oskit-mach/oskit/ds_osenv.c following:

      if (getenv ("BOGUS_CONSOLE"))
        {
          extern oskit_stream_t *console;
	  ds_console_stream = console;
	  printf("using bogus console!\n");
	  rc = 0;
	 }
       else if (serial_console)
         {
           char *p = getenv ("COM_CONS");
	   int port = p ? atoi(p) : 1;
           struct termios param = base_cooked_termios;
           puts ("serial console found");
           param.c_lflag &= ~ECHO;
           param.c_iflag &= ~ICRNL;
           param.c_oflag &= ~OPOST;
           rc = cq_com_console_init (port, &param,
                                     oskit_create_osenv_irq (),
	                             oskit_create_osenv_intr (),
				     oskit_create_osenv_sleep (),
                                     &ds_console_stream);
	 }
       else
         {
           rc = cq_direct_console_init (oskit_create_osenv_irq (),
                                        oskit_create_osenv_intr (),
                                        oskit_create_osenv_sleep (),
					&ds_console_stream);
	   direct_cons_set_flags (DC_NO_ONLCR);
	 }

Commenting the last line out helped. Is this flag needed? 


* Another nasty thing is that serial line debugging is only working up
to certain point. Adding 

         gdb_pc_com_init(1,NULL); 
	 gdb_breakpoint();

at the begining in oskit-mach/oskit/x86/main.c works fine. But if a step
through the code, the kernel crashes when 'idt_init ()' has been called
(the machine reboots immediately). 

Yesterday the kernel terminated with the messages, that INT 3 is not
supported. Unfortunately I can't reproduce it today. So this information
is a bit vague. sorry.
         
wagi

-- 
Daniel Wagner
email: wagi@gmx.ch

GnuPG: 1024D/DCDE890A (public key available on any keyserver)