i386 int $0x80 eax eax
ia64 break 0x100000 r15 r10/r8
parisc ble 0x100(%sr2, %r0) r20 r28
-s390 svc 0 r1 r2 NR may be passed directly with
-s390x svc 0 r1 r2 "svc NR" if NR is less than 256
+s390 svc 0 r1 r2 NR が 256 未満の場合 "svc NR" で
+s390x svc 0 r1 r2 NR が直接渡される場合がある
sparc/32 t 0x10 g1 o0
sparc/64 t 0x6d g1 o0
x86_64 syscall rax rax