How can I know what this does?
- by Dabor Troppe
I got this piece of Assembly code extracted from some piece of software, but unfortunately I don't know anything of assembler and the bits I touched of Assembler was back in the Commodore Amiga with the 68000.
Can anybody guide me on how I could understand this code without me needing to learn assembler from scratch, or just tell me what it does?
Is there any kind of "Simulator" out there that I can run this on to see what it does?
-[ObjSample Param1:andParam2:]:
00000c79 pushl %ebp
00000c7a movl %esp,%ebp
00000c7c subl $0x48,%esp
00000c7f movl %ebx,0xf4(%ebp)
00000c82 movl %esi,0xf8(%ebp)
00000c85 movl %edi,0xfc(%ebp)
00000c88 calll 0x00000c8d
00000c8d popl %ebx
00000c8e cmpb $-[ObjSample delegate],_bDoOnce.26952-0xc8d(%ebx)
00000c95 jel 0x00000d47
00000c9b movb $-[ObjSample delegate],_bDoOnce.26952-0xc8d(%ebx)
00000ca2 movl 0x7dc0-0xc8d(%ebx),%eax
00000ca8 movl %eax,0x04(%esp)
00000cac movl 0x7df4-0xc8d(%ebx),%eax
00000cb2 movl %eax,(%esp)
00000cb5 calll _objc_msgSend
00000cba movl 0x7dbc-0xc8d(%ebx),%edx
00000cc0 movl %edx,0x04(%esp)
00000cc4 movl %eax,(%esp)
00000cc7 calll _objc_msgSend
00000ccc movl %eax,0xe4(%ebp)
00000ccf movl 0x7db8-0xc8d(%ebx),%eax
00000cd5 movl %eax,0x04(%esp)
00000cd9 movl 0xe4(%ebp),%eax
00000cdc movl %eax,(%esp)
00000cdf calll _objc_msgSend
00000ce4 leal (%eax,%eax),%edi
00000ce7 movl %edi,(%esp)
00000cea calll _malloc
00000cef movl %eax,%esi
00000cf1 movl %edi,0x08(%esp)
00000cf5 movl $-[ObjSample delegate],0x04(%esp)
00000cfd movl %eax,(%esp)
00000d00 calll _memset
00000d05 movl $0x00000004,0x10(%esp)
00000d0d movl %edi,0x0c(%esp)
00000d11 movl %esi,0x08(%esp)
00000d15 movl 0x7db4-0xc8d(%ebx),%eax
00000d1b movl %eax,0x04(%esp)
00000d1f movl 0xe4(%ebp),%eax
00000d22 movl %eax,(%esp)
00000d25 calll _objc_msgSend
00000d2a xorl %edx,%edx
00000d2c movl %edi,%eax
00000d2e shrl $0x03,%eax
00000d31 jmp 0x00000d34
00000d33 incl %edx
00000d34 cmpl %edx,%eax
00000d36 ja 0x00000d33
00000d38 movl %esi,(%esp)
00000d3b calll _free
00000d40 movb $0x01,_isAuthenticated-0xc8d(%ebx)
00000d47 movzbl _isAuthenticated-0xc8d(%ebx),%eax
00000d4e movl 0xf4(%ebp),%ebx
00000d51 movl 0xf8(%ebp),%esi
00000d54 movl 0xfc(%ebp),%edi
00000d57 leave
00000d58 ret
