IAS:
Porting IAS

Porting IAS to Different Platforms

Porting IAS to platforms other than SPARCstations^TM running Solaris should not be very difficult.
It will, however, require some effort.

There are assumptions regarding big-endianness and 32-bit words in the code. Porting to other 32-bit, big-endian machines should be fairly straightforward.

For other types of machines, some areas of the code which will need to be reviewed, if not changed.
These areas of code are:

• The memory access model, including javamem.[ch], cm.[ch], calling cmMemoryRead,
  cmMemoryWrite and so on.
• Some floating point operations code in jvm_ops.c, such as F_RESET_SIGN_IF_NAN.
• The definition of long long (int64_t) types in the code.

IAS contains a check inside iam.c to verify that it is invoked on a 32-bit big-endian machine.

Note: This check may as well have been inside initPico() so it could be done only once.

Porting to a Different Big Endian, 32-bit Machine

Some changes which may be necessary to get IAS to work under HP-UX, compiling with gcc.
Note: These changes are not tested, not supported and may not be complete.

You need to:

• Have a version of libtcl7.5.a and libz.a.
  
• Update the -llibtcl7.5 line libtcl7.6.a.
  in sim/src/Makefile.in if it presents any problems.
• Have a copy of libtcl source or binary.
  You can get this from http://www.scriptics.com/software/download.html.
• Have a copy of libz.a source or binary.
  You can get this from http://www.cdrom.com/pub/infozip/zlib.
• Change the definition of UNAME to hpux in all makefiles.
• Change the name of dlfcn.h include file to dl.h.
• Change the names of all dlxxx files, such as dlopen, dlsym
  to shl_xxxx names, such as shl_load, shl_findsym.
• Delete any Makefile.in files containing the -ldl option for linking.
• Remove the file ieeefp.h included in jmath_md.h.
  It is not needed since ieeefp.h is not present on HP.
• Have a copy of the libelf.a library which may not be present under HP-UX.
  The loadElf command implemented in tools/dsv/sim/src/elf.c
  depends on it. If you do not need loadElf functionality, you can remove the code for this from sim/src/elf.c.
  If you find you do need this code, you can get a public domain
  version of libelf.a from ftp://sunsite.unc.edu/pub/Linux/libs.