Matakuliah
Tahun
Versi
: H0182/Pemrograman Sistem
: 2006
: 01
Pertemuan 9
Loaders
1
Learning Outcomes
• Mahasiswa dapat memahami cara kerja
awal dari sebuah eksekusi program di
memory
• Mahasiswa dapat mengerti evolusi yang
terjadi pada sistem operasi di komputer
2
Task of Loader
1. Allocate space in memory for the
program (allocation)
2. Resolve symbolic references between
object decks (linking)
3. Adjust all address dependant locations,
such address constants, to correspond to
the allocated space (relocation)
4. Physically place the machine instruction
and data into memory (loading)
3
Loader Schemes
1.
2.
3.
4.
5.
6.
7.
Compile and Go Loaders
General Loader Scheme
Absolute Loaders
Subroutine Linkage
Relocating Loaders
Direct-Linking Loaders
Other Loader Scheme
-
Binders
Linking Loaders
Overlay
Dynamic Binders
4
Compile and Go Loaders
Memory
Source
Program
deck
Compile-and-Go
Translator
(e.g.,assembler)
Program
Loaded
In memory
Assembler
5
General Loader Scheme
Memory
Source
Program
Translator
Object
Program 1
Loader
Source
Program
Translator
Object
Program 2
Object
Programs
Ready for
execution
Loader
6