Porting kaffe to LynxOS on Powerpc

[Rainer Kloud]

Hi All,

I'm interested in useing the java technology in embedded
systems, so I have searched for a suitable java implementation
which is running on my operating system LynxOS on PowerPC.
I had read, that kaffe is very simple to port to all
operating systems which are useing the POSIX standard.
So I have tried to compile Kaffe 1.0.5 cross on a solaris
host useing cygnus gcc version 2.7-97r1 19990817.

I have configured kaffe as following:
./configure  --prefix=/home/hiroshima/LynxOS3.0.1/kaffe --disable-shared

powerpc-unknown-linux --enable-ltdl-convenience
--with-threads=unix-pthreads --without-x --with-engine=intrp

At the compiling process I had only two minor problems:
1) The thread implementation was different (some
   names of the pthread systemcalls are different)
2) I have no sysdepCallMethod implementation. So I have
   inserted only a empty implementation, because I think
   sysdepCallMethod should only be used when invoking
   native methods, correct?

When running Kaffe everytime a SIGSEGV occures when the JVM
tries to load the class 'java/lang/StringBuffer.class'.

The SIGSEGV occures in 'runVirtualMachine' (file kaffe.def)
at:

define_insn(INVOKEVIRTUAL)
{
...
load_offset_ref(mtable, stack(idx), method_dtable_offset); <-- SIGSEGV

After that I have switched on some trace messages and I got
the following output:

Loading java/lang/StringBuffer.class
000: INVOKESTATIC
Call: java/lang/System.getProperties()Ljava/util/Properties;.
000: INVOKESTATIC
Call: java/lang/System.checkPropertyAccess()V.
000: INVOKESTATIC
Call: java/lang/System.getSecurityManager()Ljava/lang/SecurityManager;.
000: GETSTATIC
003: ARETURN
003: INVOKEVIRTUAL
Call: java/lang/NullSecurityManager.checkPropertiesAccess()V.
000: RETURN
006: RETURN
003: GETSTATIC
006: ARETURN
003: LDC1
005: INVOKEVIRTUAL

When I debug machine.c so I can see that the field in the sp
array, which is addressed with -idx, is not initialized,
so the access to (&sp[-( idx )])  )[0].v.taddr leeds to
the SIGSEGV. But why isn't that field initialized? I
have also compiled kaffe for linux on i386 and in my debug
session I have seen that there the field is correctly initialized!

Does anybody know why I get this problems or can anybody
tell me what I should try to catch this error?

Thanx in advance.
Rainer

--
.........................................
Rainer Kloud
Siemens AG Österreich, PSE EZE TR2
Rampengasse 3-5, A-1190 Vienna, Austria
mailto:rainer.kloud at siemens.at
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