Assembly Language: Function Calls PDF

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Lecture 5: Introduction to Assembly

movl %edi -8(%rbp) movq %rsi

x64 Cheat Sheet

x64 assembly code uses sixteen 64-bit registers. Additionally the lower bytes of some of these addq. $0x18

x86 Basics

Generated x86 Assembly Code sum: addq %rdi%rsi movq %rsi

Assembly Programming III Assembly Programming III

addq. %rdx %rax. # rax/t2 = t1 + z leaq. (%rsi

C to assembly / C

3 sept. 2019 addq $10 %rax. // a += 1 jmp after_else after_then: ... Which are correct assembly translations? // version A ... assembly: addq $8

Assembly Language: Function Calls

Implementation of call. Instruction Effective Operations pushq src subq $8 %rsp movq src

CS429: Computer Organization and Architecture - Instruction Set

2 oct. 2019 It is a gentler introduction to assembly level programming than the x86. ... addq. %rdx %rax. # sum + = i addq. %rcx

x86-64 Machine-Level Programming?

9 sept. 2005 of the assembly language programmer's view of the hardware [2 4]

Lecture 6: Control Flow in Assembly

code and indicate whether or not the jump will occur. In all cases

1Assembly Language: Function Calls

Goals of this LectureHelp you learn:•Function call problems•x86-64 solutions•Pertinent instructions and conventions2

Function Call Problems(1) Calling and returning•How does caller function jump to callee function?•How does callee function jump back to the right place in caller function?(2) Passing arguments•How does caller function pass arguments to callee function?(3) Storing local variables•Where does callee function store its local variables?(5) Returning a value•How does callee function send return value back to caller function?•How does caller function access the return value?(6) Optimization•How do caller and callee function minimize memory access?3

Running ExampleCalls standard C labs()function•Returns absolute value of given long4long absadd(long a, long b){ long absA, absB, sum;absA = labs(a);absB = labs(b);sum = absA + absB;return sum;}

AgendaCalling and returningPassing argumentsStoring local variablesReturning a valueOptimization5

6Problem 1: Calling and ReturningHow does caller jump to callee?•I.e., Jump to the address of the calleeAquotesdbs_dbs8.pdfusesText_14

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[PDF] Assembly Language: Function Calls