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numist/NSFastEnumeration.m

Created February 21, 2013 01:45
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Annotated disassembly of NSFastEnumeration
Raw
NSFastEnumeration.m
function _MyEnumerator {
stackGuard = **__stack_chk_guard;
rax = objc_retain();
collection = rax;
memset(&fastEnumerationState, 0x0, 0x40);
rax = [collection retain];
collection = rax;
rax = [rax countByEnumeratingWithState:&fastEnumerationState objects:&stackbuf count:0x10];
initialStackbufCount = rax;
if (rax != 0x0) {
mutations = *mutationsPtr;
mutationsPtrPtr = &fastEnumerationState + 0x10;
stackbufIndex_2 = 0x0;
stackbufCount = initialStackbufCount;
do {
do {
stackbufIndex = stackbufIndex_2;
stackbufCount_2 = stackbufCount;
if (**mutationsPtrPtr != mutations) {
objc_enumerationMutation(collection);
}
rdx = stackbufIndex;
rcx = *(stackbufPtr + rdx * 0x8);
member = rcx;
NSLog(@"%@", member, rdx, rcx);
rax = stackbufIndex + 0x1;
rcx = stackbufCount_2;
stackbufCount = rcx;
stackbufIndex_2 = rax;
} while (rax < rcx);
zero = 0x0;
rax = [collection countByEnumeratingWithState:&fastEnumerationState objects:&stackbuf count:0x10];
stackbufIndex_2 = zero;
stackbufCount = rax;
} while (rax != 0x0);
}
[collection release];
rax = [collection release];
if (**__stack_chk_guard == stackGuard) {
return rax;
}
else {
rax = __stack_chk_fail();
}
return rax;
}
Raw
NSFastEnumeration.s
; Basic Block Input Regs: <nothing> - Killed Regs: rax rcx rdx rbp rsi rdi r8
_MyEnumerator:
0000000100001720 55 push rbp ; XREF=0x100001af9
0000000100001721 4889E5 mov rbp, rsp
0000000100001724 4881EC20010000 sub rsp, 0x120
000000010000172b 488B05DE080000 mov rax, qword [ds:imp___got____stack_chk_guard]
0000000100001732 488B00 mov rax, qword [ds:rax]
0000000100001735 488945F8 mov qword [ss:rbp-0x120+stackGuard], rax
0000000100001739 E8BA040000 call imp___stubs__objc_retain
000000010000173e BE00000000 mov esi, 0x0
0000000100001743 48BA4000000000000000 mov rdx, 0x40
000000010000174d 488D7DA8 lea rdi, qword [ss:rbp-0x120+fastEnumerationState]
0000000100001751 488945F0 mov qword [ss:rbp-0x120+collection], rax
0000000100001755 E8BC040000 call imp___stubs__memset
000000010000175a 488B7DF0 mov rdi, qword [ss:rbp-0x120+collection]
000000010000175e E895040000 call imp___stubs__objc_retain
0000000100001763 488D55A8 lea rdx, qword [ss:rbp-0x120+fastEnumerationState]
0000000100001767 488D8D28FFFFFF lea rcx, qword [ss:rbp-0x120+stackbuf]
000000010000176e 49B81000000000000000 mov r8, 0x10
0000000100001778 488B35C90A0000 mov rsi, qword [ds:objc_sel_countByEnumeratingWithState_objects_count_] ; @selector(countByEnumeratingWithState:objects:count:)
000000010000177f 4889C7 mov rdi, rax
0000000100001782 48898520FFFFFF mov qword [ss:rbp-0x120+collection], rax
0000000100001789 E858040000 call imp___stubs__objc_msgSend
000000010000178e 483D00000000 cmp rax, 0x0
0000000100001794 48898518FFFFFF mov qword [ss:rbp-0x120+initialStackbufCount], rax
000000010000179b 0F842E010000 je 0x1000018cf
; Basic Block Input Regs: rbp - Killed Regs: rax rcx rdx rbp rsi
00000001000017a1 48B80000000000000000 mov rax, 0x0
00000001000017ab 488D4DA8 lea rcx, qword [ss:rbp-0x120+fastEnumerationState]
00000001000017af 4881C110000000 add rcx, 0x10
00000001000017b6 488B55B8 mov rdx, qword [ss:rbp-0x120+mutationsPtr]
00000001000017ba 488B12 mov rdx, qword [ds:rdx]
00000001000017bd 488BB518FFFFFF mov rsi, qword [ss:rbp-0x120+initialStackbufCount]
00000001000017c4 48899510FFFFFF mov qword [ss:rbp-0x120+mutations], rdx
00000001000017cb 48898D08FFFFFF mov qword [ss:rbp-0x120+mutationsPtrPtr], rcx
00000001000017d2 48898500FFFFFF mov qword [ss:rbp-0x120+stackbufIndex_2], rax
00000001000017d9 4889B5F8FEFFFF mov qword [ss:rbp-0x120+stackbufCount], rsi
; Basic Block Input Regs: rbp - Killed Regs: rax rcx rdx rbp rsi rdi
00000001000017e0 488B8500FFFFFF mov rax, qword [ss:rbp-0x120+stackbufIndex_2] ; XREF=0x10000186f, 0x1000018c9
00000001000017e7 488B8DF8FEFFFF mov rcx, qword [ss:rbp-0x120+stackbufCount]
00000001000017ee 488B9508FFFFFF mov rdx, qword [ss:rbp-0x120+mutationsPtrPtr]
00000001000017f5 488B32 mov rsi, qword [ds:rdx]
00000001000017f8 488BBD10FFFFFF mov rdi, qword [ss:rbp-0x120+mutations]
00000001000017ff 48393E cmp qword [ds:rsi], rdi
0000000100001802 488985F0FEFFFF mov qword [ss:rbp-0x120+stackbufIndex], rax
0000000100001809 48898DE8FEFFFF mov qword [ss:rbp-0x120+stackbufCount_2], rcx
0000000100001810 0F840C000000 je 0x100001822
; Basic Block Input Regs: rbp - Killed Regs: rdi
0000000100001816 488BBD20FFFFFF mov rdi, qword [ss:rbp-0x120+collection]
000000010000181d E8B8030000 call imp___stubs__objc_enumerationMutation
; Basic Block Input Regs: rbp - Killed Regs: rax rcx rdx rbp rsi rdi
0000000100001822 488D050F0B0000 lea rax, qword [ds:cfstring___] ; @"%@" XREF=0x100001810
0000000100001829 488B4DB0 mov rcx, qword [ss:rbp-0x120+stackbufPtr]
000000010000182d 488B95F0FEFFFF mov rdx, qword [ss:rbp-0x120+stackbufIndex]
0000000100001834 488B0CD1 mov rcx, qword [ds:rcx+rdx*8]
0000000100001838 48894DE8 mov qword [ss:rbp-0x120+member], rcx
000000010000183c 488B75E8 mov rsi, qword [ss:rbp-0x120+member]
0000000100001840 4889C7 mov rdi, rax
0000000100001843 B000 mov al, 0x0
0000000100001845 E878030000 call imp___stubs__NSLog
000000010000184a 488B85F0FEFFFF mov rax, qword [ss:rbp-0x120+stackbufIndex]
0000000100001851 480501000000 add rax, 0x1
0000000100001857 488B8DE8FEFFFF mov rcx, qword [ss:rbp-0x120+stackbufCount_2]
000000010000185e 4839C8 cmp rax, rcx
0000000100001861 48898DF8FEFFFF mov qword [ss:rbp-0x120+stackbufCount], rcx
0000000100001868 48898500FFFFFF mov qword [ss:rbp-0x120+stackbufIndex_2], rax
000000010000186f 0F826BFFFFFF jc 0x1000017e0
; Basic Block Input Regs: rbp - Killed Regs: rax rcx rdx rbp rsi rdi r8
0000000100001875 48B80000000000000000 mov rax, 0x0
000000010000187f 488D55A8 lea rdx, qword [ss:rbp-0x120+fastEnumerationState]
0000000100001883 488D8D28FFFFFF lea rcx, qword [ss:rbp-0x120+stackbuf]
000000010000188a 49B81000000000000000 mov r8, 0x10
0000000100001894 488B35AD090000 mov rsi, qword [ds:objc_sel_countByEnumeratingWithState_objects_count_] ; @selector(countByEnumeratingWithState:objects:count:)
000000010000189b 488BBD20FFFFFF mov rdi, qword [ss:rbp-0x120+collection]
00000001000018a2 488985E0FEFFFF mov qword [ss:rbp-0x120+zero], rax
00000001000018a9 E838030000 call imp___stubs__objc_msgSend
00000001000018ae 483D00000000 cmp rax, 0x0
00000001000018b4 488B8DE0FEFFFF mov rcx, qword [ss:rbp-0x120+zero]
00000001000018bb 48898D00FFFFFF mov qword [ss:rbp-0x120+stackbufIndex_2], rcx
00000001000018c2 488985F8FEFFFF mov qword [ss:rbp-0x120+stackbufCount], rax
00000001000018c9 0F8511FFFFFF jne 0x1000017e0
; Basic Block Input Regs: rbp - Killed Regs: rax rdi
00000001000018cf 488BBD20FFFFFF mov rdi, qword [ss:rbp-0x120+collection] ; XREF=0x10000179b
00000001000018d6 E817030000 call imp___stubs__objc_release
00000001000018db 488B7DF0 mov rdi, qword [ss:rbp-0x120+collection]
00000001000018df E80E030000 call imp___stubs__objc_release
00000001000018e4 488B3D25070000 mov rdi, qword [ds:imp___got____stack_chk_guard]
00000001000018eb 488B3F mov rdi, qword [ds:rdi]
00000001000018ee 488B45F8 mov rax, qword [ss:rbp-0x120+stackGuard]
00000001000018f2 4839C7 cmp rdi, rax
00000001000018f5 0F8509000000 jne 0x100001904
; Basic Block Input Regs: <nothing> - Killed Regs: rsp rbp
00000001000018fb 4881C420010000 add rsp, 0x120
0000000100001902 5D pop rbp
0000000100001903 C3 ret
; Basic Block Input Regs: <nothing> - Killed Regs: <nothing>
0000000100001904 E807030000 call imp___stubs____stack_chk_fail ; XREF=0x1000018f5
; endp
0000000100001909 0F1F8000000000 nop dword [ds:rax+0x0]
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