It is difficult to use natural languages such as Chinese and English to describe the similarities and differences between C ++ pointers and references in a concise and transparent manner, reading the disassembly code that contains pointers and references is a good way: this is definitely a non-ambiguity and concise statement as much as possible.For example, the following codeVoid main (void){Int x1 = 0, * ptrx1 = x1;Int x2 = 0, refx2 = x2;
(* Ptrx1)
In "C Traps and defects", the following code appears:#include The author's explanation is that if the compiler used to compile the program allocates memory to the variable in a way that decrements the memory address, the final assignment is to the variable I and into the dead loop.Run the program in VC6.0 to see the disassembly code:From the results, it is known that the allocation of memory results in decreasing the address of the variable to allocat
Kernel development, Kernel panic is more common. According to the exception stack, we can usually locate the approximate location of code errors, but sometimes we still need to use the Disassembly tool to help us locate some exceptions, objdump.
This Disassembly tool exists in the prebuilts/GCC/linux-x86/ARM/gcc-linaro-aarch64-linux-gnu/bin/folder, you can refer to the following usage:
1) prebuilts/GCC/li
After compiling the link, the program written under Windows can be debugged by debugging tools such as Debug, as well as the results of disassembly, which makes it easy to understand how the assembler instruction translates into "machine instructions". For Windows programs, there are a lot of tools like SoftICE, TRW, W32dasm, IDA, Hiew, and so on. Here to talk about W32dasm.
;===============================================================; Example: T
Set GDB disassembly syntax for IntelThe "Set dis Intel", which is popular in various Linux books, is no longer applicable, and the following error occurs:Ambiguous set command "Dis Intel": Disable-randomization, Disassemble-next-line, Disassembly-flavor, Disconnected-tracing ...The correct command is:sudo echo "set Disassembly-flavor Intel" > ~/.gdbinitGDB will s
Paste the source code first#include Another example#include Another one.#include Disassembly analysis1:void Main () 2: {00401010 push ebp00401011 mov ebp,esp00401013 sub esp,68h00401016 p Ush ebx00401017 push esi00401018 push edi00401019 Lea EDI,[EBP-68H]0040101C mov ECX,1AH00401021 mov eax,0cccccccch00401026 rep stos dword ptr [Edi]3:int narray[5] = {1, 2, 3 , 4, 5};00401028 mov dword ptr [ebp-14h],1 stack is the first element from the bottom
This section studies the execution flow of C + + non-static member functions and virtual functions through disassembly;The code snippet is as followsClass Animal{public: virtual void print () { cout The output is as follows:[Email protected]:~/desktop$./testdog::p rint 1Animal::p rint2 _age address:0xbfc5c7f8 value:1virtual Fun ADDRESS:0XBFC 5c7f4virtual fun[1] address:0x8048c30virtual fun[2] Address:0x8048c34Explain the points:(1) This section w
In Linux, gcc is used for compilation, gdb is used for disassembly of C language programs, and gccgdbUse the Virtual Machine VMware Workstation 10Linux environment: Ubuntu 14.04 LTS Server amd64
The process is as follows.The first is the hello world Program. Note: The gcc-o parameter specifies the file name of the generated program. In gdb, The disas command corresponds to discycler in English, which is disassembl
1: value is passed by default when the variable name is used as a function parameterThe following points can be seen from the disassembly:1: Value passing by default (MOV)2: The transfer of parameters in a function call is passed from right to left 2: Passing parameters by reference is actually an address, not a variable The following points can be seen from the disassembly:The 1:lea takes the address operator, so the address is passed as a reference
When debugging a c # program in vs2005, you may want to view the assembly code, memory, and registers of the C # code.
To view the disassembly code, right-click the code window and select "go to disassembly. In the assembly code window, you can follow F11 to execute code in a single step, so as to more accurately track code execution.
If you want to view the changes of the registers at the same time, clic
Address: http://blog.csdn.net/ariesjzj/article/details/7311340
Two popular methods are described here.
The advantage of method 1 is that byte code can be decompiled into code form, but after all, it is reverse engineering and sometimes some byte code will be inserted, I also encountered some files that were opened through disassembly and crash, but after all, there were a few. In addition, the disassembly
.
Activate functions window (click a row to make this window in focus state), and choose search> search...> Input Function Name> OK from the top menu. Ida is a fuzzy search. You can leave the full name blank. As long as you can ensure that the entered characters will make the search results unique, if the match is in progress, it will jump to that function and double-click this function, you can see the disassembly of this function in the right wi
The following cases mainly describe the application value of disassembly, that is, the application of software encryption and decryption, and the application of basic assembly commands in practice, you can also recognize the power of ollydbg in software debugging.
The optional example program crackme.exe comes from the "use ollydbg cracking from scratch" series of the snow forum. This document is intended only for learning and communication purposes,
This tool from the original version of the jump distribution map only to more visually analyze the branch structure of the disassembly code, the third version of the visual map to start the reverse branching code output, the fourth version of the branch output strategy of some exploration, the fifth version of the combination of previous exploration to improve. The sixth edition is enhanced on the basis of the current functionality, using the basic fu
OD Memory Map owner cannot find the current program name resolutionCanceling the Strongod option in the Advanced enumeration module option is OK. Restart ODFollow Classproc Disassembly window Blank SolutionThere is a problem with StrongOD.dll. Online Baidu Fish C Studio with his StrongOD.dll can solve this problemCopy the following error picture connection is actually good strongod download link to download the JPG into a DLL can beOD Memory Map owner
Recently, when debugging Uboot's code, the new version of the Uboot,lowlevel_init function is empty, and no links to LOWLEVEL_INIT.O are found in the link file. Two lights were added before and after BL Lowlevel_init, and it was found that the part after BL was not executed, so I wanted to see if the program had run this function. Find the way to the disassembly bin file on the Internet, it is very useful to find a friend to provide.Use the arm-linux-
The subclass constructor calls the parent class first. The subclass retains a piece of space for the parent class.An example is given to analyze:Class A {public : A () { } ~a () { coutHere's the disassembly code.1: #include The constructor of CPP disassembly analysis
From: http://blog.csdn.net/kikilizhm/article/details/7771573
Recently debugged ubootCodeIn the new version of uboot, lowlevel_init function is empty, and no link to lowlevel_init.o is found in the Link file. Two lights were added before BL lowlevel_init and found that the parts after BL were not executed.ProgramHave you run this function. I found some methods provided by some friends when I searched for binfiles on the Internet, which is very useful.
You can use the arm-Linux-objdump in the
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.