Talk:Kernel Syscalls

i dont know if its right, pls correct me if im wrong :) --Zmaster 13:58, 29 November 2011 (MST)

HTTP/i0nic: The following is hardly "bogus". 0x30d2ad54 <chown>: mov r12, #16  ; 0x10, being # of chown 0x30d2ad58 <chown+4>: svc 0x00000080 is a direct disassembly of libSystem. You can see that with gdb on a jb device.

SVC is an ARM instruction to invoke a "supervisor call". The 0x80 is the call #, because the chip allows an interrupt vector, much like Intel's INT instruction. Then, you place the syscall # (in the above example, chown) in r12. [[User:morpheus|morpheus||3/1/2012, 20:01 EST.