Booting problems with netboot

[Kris.Hermans at cs.kuleuven.ac.be (Kris Hermans)]

Hello Again,

I'm trying to create a set-up with 2 PC's (host: pentium with linux,
target: pc386).  I want to work with GNAT/RTEMS - 4.0.

Up until now, I can make a hello world progam in Ada, create a .exe file
and boot it on the target using GRUB and a diskette.  However, to make
development more comfortable, I want to use netboot (and download the *.bt
files ...).

So, I read the bsp-pc386-howto and followed the guidelines for setting up
a BOOTP/TFTP server and a bootrom image on floppy.  After setting up, I
tried to compile the hello.adb and create a hello.bt.  These are the
steps I took:

1) make -f Makefile.pc386
This gives the following output.  There *are* error-msgs, but as I have a
.exe and a .bt, I assume correct results (Any ideas why these msgs ?)

/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//bin/i386-rtems-gnatmake -v -O
-gnata -gnatE -gnato hello -g -o hello.obj \
    -bargs -r \
    -cargs -B/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/lib/
-specs bsp_specs -qrtems -Wl,-Ttext,0x00100000 -Wl,--oformat,elf32-i386 \
    -largs -B/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/lib/
-specs bsp_specs -qrtems -Wl,-Ttext,0x00100000 -Wl,--oformat,elf32-i386
init.o

GNATMAKE 3.11p  (981118) Copyright 1995-1998 Free Software Foundation,
Inc.
  "hello.ali" being checked ...
  "bsp_specs" missing.
i386-rtems-gnatbind -aO./ -r -I- -x hello.ali
i386-rtems-gnatlink -g -o hello.obj
-B/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/lib/ -specs
bsp_specs -qrtems -Wl,-Ttext,0x00100000 -Wl,--oformat,elf32-i386 init.o
hello.ali
i386-rtems-gcc: file path prefix
`/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/lib/' never used
/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//bin/i386-rtems-size hello.obj
   text    data     bss     dec     hex filename
 165312    6548   42188  214048   34420 hello.obj
/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//bin/i386-rtems-nm -g -n
hello.obj >hello.num
/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//bin/i386-rtems-objcopy -O
a.out-i386 \
            --remove-section=.rodata \
            --remove-section=.comment \
            --remove-section=.note \
            --strip-unneeded hello.obj hello.exe
/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//bin/i386-rtems-objcopy -O
binary hello.obj hello.bin
/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/build-tools/bin2boot
-v hello.bt 0x00097E00 \

/home/pcuser8/RTEMS/gnat-3.11p/i386-rtems//rtems/pc386/lib/start16.bin
0x00097C00 0 hello.bin 0x00100000 0
header address       0x00097e00, its memory size 0x00000200
first  image address 0x00097c00, its memory size 0x00000200
second image address 0x00100000, its memory size 0x0002a000
ln hello.exe hello
ln: hello: File exists
make: *** [hello] Error 1

2) Copy the hello.bt to a location accessible by the client.

3) Boot the client.  The client boots and finds the server and its own
IP-address.  It also finds the image on the server(because if I remove it,
he complains).  But It doesn't execute the program: there is a quick blink
on the screen (I read an error but it is too fast to follow), and then the
client reboots.

If I read the log for tftpd, I see there was a correct read-request for
the .bt file.

I also read about a bug in bin2boot (opening the ouput file in ascii).
However, applying the file gave me the same results ...

Here is the makefile I used:

#
#  Makefile for hello world example
#

MAIN=hello

# Tool paths
target=i386-rtems
tooldir=/home/pcuser8/RTEMS/gnat-3.11p/${target}/
rtemsdir=${tooldir}/rtems/pc386

# Tool names
GCC=${tooldir}/bin/${target}-gcc
GNATMAKE=${tooldir}/bin/${target}-gnatmake
SIZE=${tooldir}/bin/${target}-size
OBJCOPY=${tooldir}/bin/${target}-objcopy
NM=${tooldir}/bin/${target}-nm

HEADERADDR=0x00097E00
START16FILE=$(rtemsdir)/lib/start16.bin
START16ADDR=0x00097C00
RELOCADDR=0x00100000

CARGS=-B${rtemsdir}/lib/ -specs bsp_specs -qrtems \
   -Wl,-Ttext,$(RELOCADDR) -Wl,--oformat,elf32-i386

all: init.o $(MAIN)

$(MAIN): $(MAIN).exe
	ln $(MAIN).exe $(MAIN)

$(MAIN).exe: init.o
	$(GNATMAKE) -v -O -gnata -gnatE -gnato $(MAIN) -g -o $(MAIN).obj \
	    -bargs -r \
	    -cargs $(CARGS) \
	    -largs $(CARGS) init.o
	$(SIZE) $(MAIN).obj
	$(NM) -g -n $(MAIN).obj >$(MAIN).num
	$(OBJCOPY) -O a.out-i386 \
            --remove-section=.rodata \
            --remove-section=.comment \
            --remove-section=.note \
            --strip-unneeded $(MAIN).obj $@
	$(OBJCOPY) -O binary $(MAIN).obj $(MAIN).bin
	$(rtemsdir)/build-tools/bin2boot -v $(MAIN).bt $(HEADERADDR) \
          $(START16FILE) $(START16ADDR) 0 $(MAIN).bin $(RELOCADDR) 0


init.o: init.c
	$(GCC) -O4 -g  -Wall -ansi -fasm $(CARGS) \
	    -DGNAT_MAIN_STACKSPACE=16 -c init.c

clean:
	rm -f b_$(MAIN).c b_$(MAIN).o *.o *.ali $(MAIN)


Hopefully, there is someone out there who can give me any
hints/tips/patches on the subject ?  I really would appreciate it.

Thanks,

Kris Hermans,
Researcher at the Computer Science Dept, KULeuven (Belgium)