Motorola HC12 - Manual (Page 107)

MCUez HC12 Assembler User’s Manual
MOTOROLA Sections 107
User’s Manual — MCUez HC12 Assembler
Section 6. Sections
6.1 Contents
6.2 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
6.3 Section Attributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6.3.1 Code Sections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6.3.2 Constant Data Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
6.3.3 Data Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.4 Section Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.4.1 Absolute Sections. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
6.4.2 Relocatable Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 111
6.4.3 Relocatable versus Absolute Section . . . . . . . . . . . . . . . . . . . . . . 114
6.4.3.1 Modularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
6.4.3.2 Multiple Developers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
6.4.3.3 Early Development . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
6.4.3.4 Enhanced Portability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
6.4.3.5 Tracking Overlaps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
6.4.3.6 Reusability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 115
6.2 Introduction
Sections are portions of code or data that cannot be split into smaller elements.
Each section has a name, type, and attributes. Each assembly source file
contains at least one section.
The number of sections in an assembly source file is limited only by the amount
of system memory available during assembly. If several sections with the same
name are detected inside a single source file, the code is concatenated into one
large section.
Sections with the same name, but from different modules, are combined into a
single section when linked.