Dit is de samenvatting van het zevende hoofdstuk van het vak Structuur van Computerprogramma's II. In deze samenvatting werd zowel alle relevante informatie uit de slides als informatie uit eigen notities opgenomen.
Hoofdstuk 5a: Execution model
1 The C Compilation Process (Recap from Chapter 1)
2 Anatomy of a C Program in Memory
(in a UNIX-like 32-bit model)
• When a function call is executed:
o arguments need to be evaluated to values
o control flow jumps to the body of function, and code
begins executing there
▪ Functions push/pop data from the stack as they
call each other & allocate memory on the heap
for data that must survive across functions
o once a return statement has been encountered, go back
to the function call
1
,3 Stack
3.1 Overview
3.2 Stack and Functions
Stack Frame Layout on x86 32-bit Architecture
• from 386 to Pentium 4 (~1985-2005)
3.2.1 Intro: Basics of x86 32-bit processors
• Have 8 general purpose registers:
3.2.2 Stack Frame
• Each language and architecture has their own calling convention = the way the stack frame
looks (which arguments are put on the stack, in what order are they put onto the stack…)
2
, 3.2.3 Instruction Set - GNU assembly syntax (GAS) ~AT&T syntax
• GAS is a subset of the Intel processor instruction set used in GCC assembly
4 Execution of a C Program by Example
3
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