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 :	mov	r12, #16	      ; 0x10, being # of chown 0x30d2ad58 :	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. morpheus ||3/1/2012, 20:01 EST.

-- Edit:

OOOOOH. Now I get it. He meant the CPU syscalls, not the kernel syscalls. This needs more research (who originally put that part?)
 * Look at page history. It seems like it came from Chronic? Hardly imaginable he entered wrong infos. Maybe just very outdated? I have too few experience with ARM and kernel to contribute here. Feel free to remove wrong infos or just mention where it belongs to. --http 01:14, 2 March 2012 (MST)

OS thinko?
Morpheus: when you wrote "Most of these syscalls are the same as those of iOS" did you mean to write "Most of these syscalls are the same as those of OS X"? Weren't we already talking about iOS at the time? --beej 09:08, 20 March 2012 (MDT)

Beej: Yep. Serves me right for writing this when I'm so jetlagged.