Differences Between ARM Assembly and x86 Assembly
I'm now going to learn ARM Assembly, to develop for my Windows Mobile 5 iPAQ, but I have some questions:
- What Are The Main Differences Between ARM Assembly and x86 Assembly?
- Is Any Differences In The Interrupts(New Types)?
- Which Are They And What Is The Meaning Of They?
- Best Assembler To Compile And Where To Get It?
- Where I Can Find Some Good Resources?
I am trying to learn assembly, and have a program in AT&T syntax, for use with GNU AS Which I believe should work. I receive this error with GDB: Program received signal SIGSEGV, Segmentation faul
According to http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.dui0056d/Cihcciij.html , if my ARM assembly code need to access a C global variable named globvar, I should use import and load
I tought I understood brackets in x86 assembly. In this example, the register ax should contain X, because brackets represents the current address of LABEL. mov ax, [LABEL] LABEL: db X, 0 But I don
I have a small XScale/ARMv5-based device here and despite ARM being a popular architecture, I can't find tutorials or anything simple on ARM assembly that isn't based around an intermediate OS. For in
I'm building a Windows Assembly program without any macro. So I downloaded a program that was using macros, and I'm converting this into pure assembly code. However I'm facing one issue here. There'
I've been trying to get a good hold on the x86 assembly language, and was wondering if there was a quick-and-short equivalent of movl $1, %eax. That's when I thought that a list of idioms used frequen
Are there any command line interpreters or any other set of programs around for x86 linux in order to run MIPS assembly programs? I'd like to be able to write simple MIPS assembly programs and run the
I came across many online resources about x86 assembly. However, before starting, I want to get some feedback from others. Is there any video resources especially focused to x86 assembly programming?
I normally don't spend much time reading assembly, so the following compiler output confused me a little. Say I compile this piece of C code on my Intel Core 2 Duo running OSX 10.6: while (var != 69)
I have this piece of code that I have to convert from assembly to c. I have to convert the assembly code for a function into the c code for that function. function : 1.pushl %ebp 2.movl %esp, %ebp 3.
Im new to arm assembly and ive been learning a lot from this website here. At the end of this section here there its shows how to declare variables in assembly like so: integer_array: .word 1,2,3,4 t
Hello I am trying to learn assembly and learn how to work with floating point numbers in x86_64. From what I understand arguments are passed in xmm0, xmm1, xmm2, and so on, and the result is returned
I'm compiling my code with gcc and looking at the assembly, what is this code exactly doing? shrl $20, %edx leal (%edx,%eax), %eax sarl 1, %eax Say that the variable X is at the edx register, and Y
I am trying to create a window in x86 assembly with masm32 using the CreateWindowEx API. I have gotten my code to have no compile-time errors or anything of the sort- it compiles just fine. Yet when I
I'm in the process of writing an assembly program that takes two strings as input and concatenates them. Here's what I have: (using NASM syntax) SECTION .data hello: db Hello ,0 world: db world!,
Can anyone explain to me what this short program does? ORIGIN 0x1000 one DEFW 13 two DEFW 29 three DEFW 0 ORIGIN 0x1010 ENTRY ADR R0, one LDR R1, [R0] LDR R2, [R0, #4] ADD R1, R2, R1 STR R1, [R0, #8]
I'm trying to move the bl register into an array of bytes in x86 assembly language, but the following statement produces an error message from the masm assembler. mov arr, bl produces the output 1&
Why does the idiv x86 assembly instruction divide EDX:EAX (64 bits) by a given register whereas other mathematical operations, including multiplication, simply operate on single input and output regis
I have been searching online for the last two hours and the only thing I have found that matches what I need does not seem to work. I am trying to create a sleep/delay procedure in 16bit MASM Assembly
I am trying to view the x86 Assembly for a compiled C program in Linux, for which I do not have the source code. Can this be done with GCC, or do I need a different tool? Thanks.
I'm coming back to assembly for the sake of it after a few months and I'm having trouble getting two numbers to multiply and output the result. Here's my code: .386 .model flat, stdcall option casemap
I'm and trying to read a filename passed to my executable and write to that file using assembly. It compiles without error but fails when executed. What is wrong with my code exactly? BITS 32 segment
Below is a piece of code I have written in C and in-line assembly to load some short values from the array blk to ARM R registers. ... short *blk; ... //blk memory allocation and initialization short
I'd like to write an assembly program which once loaded into memory, writes new instructions over itself, but I'm not 100% certain how to proceed as I have some doubts about the instruction pointer an
I am learning assembly for x86 using DosBox emulator. I am trying to perform multiplication. I do not get how it works. When I write the following code: mov al, 3 mul 2 I get an error. Although, in t
The task is to write an x86 assembly program that checks all capital latters and prints A and O, but I don't know how to write the program. I tried this: .MODEL SMALL .STACK 100H .DATA PROMPT DB 'The
I have two versions of System.Data.SQLite.DLL - for x86 and x64 platform. The x86 version keeps in application folder and x64 version keeps in appFolder\x64 folder. The application compiled as AnyCPU.
I've got a problem looping in assembly language. When we want to use the counter register for looping in nested loop, what we first do is move the value of counter register into the stack for outer lo
Hello this is my first time posting here, but I am working on a homework assignment that is to design an assembly function syracuse(N, sequence) with these given rules: 1. if N is 1, end loop. 2. if N
I have an ARM assembly file (test.s) on a linux x86 computer. I would like to compile and run this file on the linux box, but I'm not sure how. Do I need to use clang? If so, what is the command?
I have some trouble with some inline assembly code. I know what should be done but I miss the how ! I have this checksum function that is almost working : static unsigned long cksum_unroll( unsign
I want to write a small low level program. For some parts of it I will need to use assembly language, but the rest of the code will be written on C/C++. So, if I will use GCC to mix C/C++ with assembl
I am trying to make sure that I understand the SI and DI registers. My background in assembly language is somewhat limited to 6502, so bear with me here. I have a quick example of how I would go about
Is there a way to write a program using pure x86 intel opcodes instead of the assembly mnemonics and instructions and then compile it with ML and LINK. For example if I try and write a 55 instead of p
I need help with a homework problem. I am supposed to figure out what the value of edx will be after this code runs. 0x40106e <main+30>: mov $0x1,%edx 0x401073 <main+35>: mov $0x8,%ecx 0x4
How can we implement the system call using sysenter/syscall directly in x86 Linux? Can anybody provide help? It would be even better if you can also show the code for amd64 platform. I know in x86, we
i've been having some issues when I try to call an assembly language function (x86) from a C program. My assembly code is the following: .model small .code .stack 100h public _putchar ;-------------
for (int i = 0; i < 10000; i++) a[i] = b[i] + c[i] What does the ARM assembly for this high level language look like? Edit: I'm also assuming the base address of A is in R8, the base address of B
I was just wondering if anybody here has written or knows where I can find a simple virtual machine written in x86 assembly, preferably Fasm, but anything would serve as an example as long as it is si
What is the difference between AppDomain, Assembly, Process, and a Thread
I'm working on i386:x86_64 and I'm writing a simple program to start a shell. Bellow is my assembly. .section .data .section .text .globl _start _start: xor %rax, %rax mov $70, %al xor %rbx, %rbx xor
I have some x86 assembly code, compiling under MASM32 6.14.8444 (to be precise), and there is one line of code that is causing me some problems: semicolon equ ; As you can see, I'm simply trying to
I am trying to load and store data from two different arm registers. int testing[64*1024] __attribute__ ((aligned (8192))); __asm__(MOV r0, %0 :: r (testing) : r0); __asm__(STR R5,[R0];); In
cmp %al, %cl js x I'm confused on what the js (jump on sign) is doing. Is it saying that if al is positive and cl is negative vice versa then jump? Also, what happens if %cl is 0 or nothing is in it
Does anyone have documentation pertaining to learning the fundamentals of Linux x86-64 assembly? I'm not sure whether or not to learn it as is, or to learn x86 first, and learn it later, but being as
I couldn't find any explanation about TVarData in x64. There is a page in Help but it seems TVarData in x64 and TVarData in x86 are different. Actually I'm trying to compile DEHL for x64 target. But i
I know I can use CORFLAGS to force a .NET assembly to 32-bits. How can I do it when I am using reflection to create the assembly in the first place? There seems to be a function to get the value ( htt
What are some alternatives to the x86 call instruction? Maybe something like a push of the return address then a jump? Also is their a command for obtaining the current position in memory?
I'm trying to learn arm assemly, it will be the first programming language that i can actually say i know. actually right now im learning the machine language first since its easier for me. My questi
I have a C file heapsort.c which Im trying to compile on a 64 bit linux machine to output the corresponding assembly code. Im using the following command: gcc -02 -S heapsort.c when I type this Im g