Ptr

In Pascal, we can create a pointer variable ptr that will point to cells of a given type, say celltype, by the declaration var ptr: ↑ celltype A postfix up-arrow is used in Pascal as the dereferencing operator, so the expression ptr↑ denotes the value (of type celltype) in the cell pointed to by ptr. ❋ Unknown (2009)

Set24: push ds ax xor ax, ax mov ds, ax mov ax, offset Int24 xchg ax, word ptr ds: [24*4] mov word ptr cs: [Old24], ax; set up critical error handler mov ax, cs xchg ax, word ptr ds: [24*4+2] mov word ptr cs: [Old24+2], ax pop ax ds ret db 0e9 ❋ Unknown (1994)

BaseThreadStart+0x46 : 448 77e8757e ff15b012e877 call dword ptr KERNEL32! ❋ Kikiwaka (2011)

FAULTING_IP: netw5v64+b6d8 fffff880 ` 0aaba6d8 488b4808 mov rcx, qword ptr [rax+8] ❋ Nick Whittome - The Naked MVP (2010)

Oh, now I see checkasm is also crashing on a similar instruction: image00000000_00400000+0x9dba4: 00000000 ` 0049dba4 660f7f7c2418 movdqa oword ptr ❋ Unknown (2009)

SampTraceEvent (741d5251) 741d7cee 8b45fc mov eax, dword ptr [ebp-4] 741d7cf2 5e pop esi ❋ Unknown (2009)

The compiler for the given function generates these assembler instructions: return FORMULA; fld dword ptr [ebp+8] fadd qword ptr ❋ Tomek Kawecki (2009)

SIMD (SSE2) optimizations: replaced MOVQ xmm, m64 (rejected by VC9 compiler) with MOVQ xmm, qword ptr m64 and MOVQ m64, xmm with MOVQ qword ptr m64, xmm ❋ Unknown (2009)

SampTraceEvent (741d5251) 741d7a5d 8b7518 mov esi, dword ptr [ebp+18h] 741d7a60 3bf3 cmp esi, ebx ❋ Unknown (2009)

Here's where it crashes: image00000000_00400000+0xbeb54: 00000000 ` 004beb54 660f7f7c2418 movdqa oword ptr ❋ Unknown (2009)

PspSystemThreadStartup+0×10c fffff800 ` 012b333e 838bfc03000001 or dword ptr [rbx+3FCh] ,1 fffff800 ` 012b3345 33c9 xor ecx, ecx ❋ Unknown (2008)

IoCreateDevice+0×1a3: fffff800 ` 012752a4 83c810 or eax,10h fffff800 ` 012752a7 898424b0000000 mov dword ptr [rsp+0B0h], eax fffff800 ` 012752ae 85ed test ebp, ebp fffff800 ` 012752b0 8bdd mov ebx, ebp fffff800 ` 012752b2 0f858123feff jne nt! ❋ Unknown (2008)

PspSystemThreadStartup+0×4c fffff800 ` 012b332c 65488b042588010000 mov rax, qword ptr gs: [188h] fffff800 ` 012b3335 483bd8 cmp rbx, rax fffff800 ` 012b3338 0f85a6d30600 jne nt! ❋ Unknown (2008)

IoCreateDevice+0×3cc: fffff800 ` 01270bd0 488d4750 lea rax, [rdi+50h] fffff800 ` 01270bd4 48894008 mov qword ptr [rax+8], rax fffff800 ` 01270bd8 488900 mov qword ptr [rax], rax fffff800 ` 01270bdb e95b480000 jmp nt! ❋ Unknown (2008)

IoCreateDevice+0×34d: fffff800 ` 0123907d 834f3008 or dword ptr [rdi+30h] ,8 fffff800 ` 01239081 e955c30300 jmp nt! ❋ Unknown (2008)