Basic ABI: SysV i386

Out-of-Process Method Invocation:
   Caller:
      eax: pointer to parameter info block (PIB)

      Call the 32-bit address stored at 0x7fff0000 to invoke the method.
      
      Upon return:
      ebx, esi, edi, ebp, esp: preserved
      eax: pointer to exception, or NULL if none
           If there is an exception, the user part of the syscall
           function will search for an exception handling function
           that covers the calling address.  If none is found,
           it will assume that it is a language without exception
           handling, and return the exception to the caller in eax.
      edx: length of exception segment, if any
      ecx: may be clobbered
      
   Callee:
      eax: pointer to PIB
      edx: pointer to caller information struct, or NULL if not
           requested
      esp: NULL.

      Jump to the 32-bit address stored at 0x7fff0004 to return.
      
      Upon return:
      eax: pointer to exception, or NULL if none
      edx: length of exception segment, if any
      ebx, esi, edi, ebp, esp: may be clobbered

Object registration:
	eax: number of objects to register with initial refcount 1
	edx: pointer to list of NewObject structs
	
	Call the 32-bit address stored at 0x7fff0008.
	
	Upon return:
	eax: pointer to exception, or NULL if none
	edx: length of exception segment, if any

GUID SHA-1 hash retrieval:
	eax: object id
	edx: 20-byte buffer
	
	Call the 32-bit address stored at 0x7fff000c.
	
	Upon return:
	eax: pointer to exception, or NULL if none
	edx: length of exception segment, if any