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first input parameter is located in the indirect addressing position 8 (%EBP) Addl (%EBP),%eax # The second parameter is located in%ebp movl%eax,%ebx # puts and values in the%EBX register, and finally returns the MOVL%EBP as a program return value,%esp popl%ebp retThe compile output after make is as follows:$./func $ echo $?108Assembly language, like the C language, functions can be defined in a separate file and finally connected to the main program file. A separate function

"Copyright Notice: respect for the original, reproduced please retain the source: blog.csdn.net/shallnet, the article only for learning Exchange, do not use for commercial purposes"loops are also a way to change the order in which instructions are executed, repeating the execution until the condition is met. We can use conditional jump directives to create loops, but in fact there is a simpler series of loop instructions in assembly language. The loop instruction uses the ECX register as the cou

What is NX Bit? Its a exploit mitigation technique which makes certain areas of memory non executable and makes an executable area, non w Ritable. Example:data, stack and heap segments is made non executable while the text segment is made non writable. List the header information for an elf programReadelf-l Vuln How to bypass NX bit and achieve arbitrary code execution? NX bit can is bypassed using an attack technique called "return-to-libc". Here return address was overwrit

In C, a union (union) is a bit like a struct, which organizes different types of data, but unlike structs, each member of a struct has its own memory space, and the total length of a struct object is the sum of the lengths of each member. In a union, each member shares a memory space, and the length of a Union object is equal to the longest length of each member.As described above, a consortium should have a multifaceted nature, that is, at the assembly level, it sometimes shows the structure's

::inheritfrom by Ebp+c.Take a look at the contents of Ebp+c:(gdb) x/x $ebp +0xc0xbff59da4: 0xbff5a672 (GDB) x/s 0xbff5a6720xbff5a672: "Helloworldthisisdevil"It can be inferred that this function caused the second virtual function table pointer to be rewritten by Xuzhina_dump_c06_s5_ex_father::setname.Take a look at what Xuzhina_dump_c06_s5_ex_father::setname did:(GDB) disassemble _zn29xuzhina_dump_c06_s5_ex_father7setnameepcdump of assembler code for function _zn29xuzhina_dump_ C06_S5_E

Linux Power Management for x86 CPU (1)----c-state ------------------------------------------------ Modern CPUs are and more powerful. When there are no job to do, it Enters into the idle state. During its Ilde period, we certainly can cut Off their power and have it enter into Low-power state only if we know When there are new assignment and we can re-activate CPU and have it do Its jobs again. The proces

Tags: tracking log post fun start add ack statistic int In front of a vectorcoredump example, contact with the vector iterator, can know that the vector iterator only one member _m_current point to a vector element.First look at the example:1 #include Because it is only to examine iterator, only to see the Getsum assembly:(GDB) disassemble getsumdump of assembler code for function _Z6GETSUMRST6VECTORIISAIIEE:0X080486CD At the 0x0804874b break point. By the above assembly, ITER's this pointer is