So following Mariano's blog and pharocasts I've built Cog with IA32ABIPlugin (works, cool !)
When starting the JVM following JNIPort instructions on SqueakSource wiki, the VM crashes.
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_PROTECTION_FAILURE at address: 0x00000000
0x00000000 in ?? ()
(gdb) bt
#0 0x00000000 in ?? ()
#1 0x000d267a in primCallOutIntegralReturn () at /Users/laurentlaffont/dev/pharo/vm/blessed/src/plugins/IA32ABI/IA32ABI.c:500
#2 0x00023a3e in interpret () at /Users/laurentlaffont/dev/pharo/vm/blessed/src/vm/gcc3x-cointerpmt.c:2037
#3 0x962ede02 in __CFRunLoopDoObservers ()
#4 0x962a9d8d in __CFRunLoopRun ()
#5 0x962a9464 in CFRunLoopRunSpecific ()
#6 0x962a9291 in CFRunLoopRunInMode ()
#7 0x934dce04 in RunCurrentEventLoopInMode ()
#8 0x934dcaf5 in ReceiveNextEventCommon ()
#9 0x934dca3e in BlockUntilNextEventMatchingListInMode ()
#10 0x9644778d in _DPSNextEvent ()
#11 0x96446fce in -[NSApplication nextEventMatchingMask:untilDate:inMode:dequeue:] ()
#<a href="tel:12%200x96409247" value="+12096409247" target="_blank">12 0x96409247 in -[NSApplication run] ()
#13 0x964012d9 in NSApplicationMain ()
#14 0x00078247 in main (argc=1, argv=0xbffff680, envp=0xbffff688) at /Users/laurentlaffont/dev/pharo/vm/blessed/platforms/iOS/vm/Common/main.m:52
(gdb)