Learn about jmp anova, we have the largest and most updated jmp anova information on alibabacloud.com
"Reprint" http://bbs.pediy.com/showthread.php?t=199036Although the skills are relatively old, but common sense is to understand1._declspec (Naked) tells the compiler not to optimize the codeFor JMP type hooks, if your own process does not use _DECLSPEC (naked), then the system will automatically add some extra code to control the stack balance, but these additional code will break the stack of the hook function.For call type hooks, be careful to resto
SIGFPE can report arithmetic anomalies. including overflow, except 0 and so on.C standard library says: the exception types that are reported by various implementations are also very different, but almost no implementation reports an integer overflow. Are you sure? I tested it and found that on GCC, integer, floating-point overflow would not be reported, except that 0 would be reported. After using the -O3 compile option, even if 0 is not reported, continue execution directly.It see
4.1 Program hack20135206 at Jia Xin?Basic directives:The NOP:NOP instruction is the "null instruction". When executing to the NOP instruction, the CPU does nothing, just as an instruction to execute the past and continue executing a command behind NOP. (Machine code: 90)JNE: Conditional transfer directives, if not equal, jumps. (Machine code: 75)JE: Conditional transfer instruction, if equal, jumps. (Machine code: 74)JMP: Unconditional transfer instru
following dialog box is displayed:You can set both of them to a breakpoint. This program only needs to set a breakpoint in the first command. Okay. Now, the first method we mentioned above is to set a breakpoint for each reference. In this way, the two Commands will set a breakpoint. After the breakpoint is set, we go to the program we are debugging. Now we click the "check it" button on the program we are debugging and it is broken by ollydbg:00401323 |. E8 4c010000 call 00401328 |. E8 a500000
PUSH; Gptr00404120 FFD0 call EAX; Request 800 bytes00404122 8905 CA404000 MOV DWORD PTR ds:[4040ca],eax00404128 89c7 MOV Edi,eax0040412A be 00104000 MOV esi,ahpack.004010000040412F Pushad; start Aplib00404130 FC CLD00404131 B2 MOV dl,8000404133 31DB XOR ebx,ebx00404135 A4 MOVS BYTE ptr es:[edi],byte ptr Ds:[esi]00404136 B3 MOV bl,200404138 E8 6d000000 call AHPACK.004041AA0040413D ^ F6 JNB short ahpack.004041350040413F 31c9 XOR ecx,ecx00404141 E8 64000000 call AHPACK.004041AA00404146 1C JNB shor
instructions1. Unconditional Transfer Instruction. JMP (JMP) jump command1) Direct Short transfer within a segmentFormat: JMP short OPROperation: (IP) 2) Direct near transfer within the segmentFormat: JMP near PTR OPROperation: (IP) 3) indirect transfer within the segmentFormat: J
small hard disk): 0001.0048 7732 ja 007c; if the value is greater than 0: 0001.004a 668b461c mov eax, [bp + 1C]; eax = number of hidden sectors: 0001.004e 6683c00c add eax, 0000000c; number of hidden sectors + 0c: 0001.0052 bb0080 mov BX, 8000; BX = 8000: 0001.0055 b90100 mov CX, 0001; Cx = 1: 0001.0058 e82b00 call 0086: 0001.005b e94803 JMP 03a6; 03a6 ?????? * Referenced by a (u) nconditional or (c) onditional jump at address:|: 0001.0106 (c)|: 0001
, 5ah; compared with 'Z' JG next JMP right; correct, numbers + uppercase letters Next: CMP Al, 61 h; comparison with 'A' Jl error2 JMP right; correct, numbers + lowercase letters Error1: mov dx, offset Messer; error message displayed MoV ah, 09 h Int 21 h JMP read1; returns the first error Error2: mov dx, offset Messer; error message displayed MoV ah, 09 h Int
main boot program moves itself from 0000: 7c00; 0000: 0600 place, for the DOS partition boot program Teng; Outbound Space0018 ea1d060000 JMP 0000: 061d; jump to 0000: 061d to continue execution, which is actually; Execute the following mov command (at the offset of 001d)001d bebe07 mov Si, 07be; 07be-0600 = 01be, 01be is the first address of the Partition Table0020 b304 mov BL, 04; up to four partition tables, that is, up to four partitions0022 803c8
enable_interrupts (Clbr_none) fixup_top_of_stack%r11,-argoffset//If there is a signal, unconditionally jumpJMP Int_check_syscall_exit_work/* ... Omit ... * /GLOBAL (Int_ret_from_sys_call) disable_interrupts (clbr_none) Trace_irqs_off MOVL$_tif_allwork_mask,%edi / * Edi:mask to check * /GLOBAL (Int_with_check) Lockdep_sys_exit_irq Get_thread_info (%RCX) Movl Ti_flags (%RCX),%edxAndl%edi,%edxJNZ int_careful Andl$~Ts_compat,ti_status (%RCX) JMP Retint_
Once accused by cnns of being plagiarized, see blind tone for specific events. Overflow programming skills in WINDOWSAuthor: Yuan GeAfter reading some overflow programs in WINDOWS, I felt that they were not uniform and perfect. I decided to write a relatively unified method and tried to solve some problems.1. jmp esp problems.KERNERL32 is used to ensure consistency. DLL code, because at least the same system KERNEL32. The DLL module load address may
determined that the content of the hidden part is consistent with the content of the segment descriptor (see the format of the segment description ), however, the format may be different. But the format is not important for us to understand this, because it is impossible for programmers to directly operate on it. We use the CS register as an example. The same is true for other registers: In real mode, when we execute a command to load the CS register (JMP
], ECx. Text: 42cf7326 mov edX, [EBP + arg_0]. Text: 42cf7329 mov eax, [EBP + var_224]. Text: 42cf732f mov ECx, [eax] We can find that the above values mainly involveOverwrite address-8Overwrite address + 4Overwrite address + 8Overwrite address + cOverwrite address + 10Overwrite address + 14These addresses are mainly write operations.In addition, if you want to override address-4 and overwrite address + 4, you can perform an add operation. The address range of the operation should also be read/w
Ddraw_err; create the device environment handle on this page. The device environment is compatible with GDI, cominvk ddsprimary, getdc, HDC retjnz ddraw_err; output text invoke setbkcolor, [HDC], 0x000000ff invoke settextcolor, [HDC], 0x00ffff00 invoke textout, [HDC], [txtpoint. x], [txtpoint. y], stmsg, dwlenmsg invoke showwindow, [hwnd], sw_shownormal invoke updatewindow, [hwnd]; ========================================================== = msg_loop: invoke getmessage, MSG, null, 0, 0 retjz en
rep STOs dword ptr [EDI]41: int S, I;42:43: While (1)00401128 mov eax, 10040112d test eax, eax0040112f je input + 0c1h (004011d1)44 :{45: printf ("\ nplease input the first number M :");00401135 push offset string "\ nplease input the first number M"... (0020.b8)0040113a call printf (00401530)0040113f add ESP, 446: scanf ("% d", M );00401142 mov ECx, dword ptr [EBP + 8]00401145 push ECx00401146 push offset string "% d" (000000b4)0040114b call scanf (004015f0)00401150 add ESP, 847:48: If (M 004
. Thank you for your support! "|: 004f4e2c b8004f4f00 mov eax, 004f4f00: 004f4e31 e8563df6ff call 00458b8c: 004f4e36 a16c305000 mov eax, dword ptr [0050306c]: 004f4e3b 8b00 mov eax, dword ptr [eax]* Possible stringdata ref from code obj-> "chinazip-registered version"|: 004f4e3d ba244f4f00 mov edX, 004f4f24: 004f4e42 e80de1f3ff call 00432f54: 004f4e47 33c0 XOR eax, eax: 004f4e49 5A pop edX: 004f4e4a 59 pop ECx: 004f4e4b 59 pop ECx: 004f4e4c 648910 mov dword ptr fs: [eax], EDX: 004f4e4f 686e4e4f0
); break ;\ Case 2: _ get_user_asm (x, PTR, retval, "W", "W", "= r", errret); break ;\ Case 4: _ get_user_asm (x, PTR, retval, "L", "", "= r", errret); break ;\ Default: (x) = _ get_user_bad ();\ }\ } While (0) # DEFINE _ get_user_asm (x, ADDR, err, itype, Rtype, ltype, errret )\ _ ASM _ volatile __(\ "1: mov" itype "% 2, %" Rtype "1 \ n "\ "2: \ n "\ ". Section. fixup, \" ax \ "\ n "\ "3: movl % 3, % 0 \ n "\ "XOR" itype "%" Rtype "1, %" Rtype "1 \ n "\ "JM
CLD; fill 0, clear the last input file name MoV CX, 128; the maximum file name is 128 characters, including carriage return characters MoV Al, 0 Lea Di, fname Rep stosb ;------------- Lea dx, fbuffer; input file name MoV ah, 0ah Int 21 h ;------------------ MoV BL, [fbuffer + 1]; Replace the last carriage return of the input file name with 0, because the created file name cannot contain invisible characters Xor bh, BH MoV Si, offset fname Add Si, BX MoV byte PTR [Si], 0 ;--------------------- L
= 000E9FD5C 72B03E16 |ThreadFunction = PERrGx5D.72B03E1600E9FD60 00394700 |pThreadParm = 0039470000E9FD64 00000000 |CreationFlags = 000E9FD68 00394758 \pThreadId = 00394758 72B05D86 FF15 0C71B072 call dword ptr ds: [72B0710C]; kernel32.CreateThread 00E9FD54 00000000 |pSecurity = NULL00E9FD58 00000000 |StackSize = 000E9FD5C 72B03E42 |ThreadFunction = PERrGx5D.72B03E4200E9FD60 00394700 |pThreadParm = 0039470000E9FD64 00000000 |CreationFlags = 000E9FD68 0039474C \pThreadId = 0039474C Handler of t
return address Ra at runtime. Then, use tx0 to record the position of the current symbol table and generate a JMP command to jump to the starting position of the main program. As we do not know where the main program is started, therefore, the JMP target is set to 0 for the time being and will be changed later. At the same time, the position of the JMP command i
Start building with 50+ products and up to 12 months usage for Elastic Compute Service
1 on 1 presale consultation
24/7 Technical Support 6 Free Tickets per Quarter Faster Response
Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.
A comprehensive suite of global cloud computing services to power your business
Payment Methods We Support
