AVR32795

21

32158A-AVR-01/11

11 Table of Contents

Features ............................................................................................... 1

1 Introduction ...................................................................................... 1

2 Memory map..................................................................................... 2

3 Basic linker script concepts ........................................................... 3

3.1 Sections............................................................................................................... 3

3.2 Section properties ............................................................................................... 3

3.3 VMA and LMA ..................................................................................................... 3

3.4 Symbols............................................................................................................... 3

3.5 Well-known sections............................................................................................ 3

4 Default versus specific linker script............................................... 5

5 GNU linker script walkthrough ....................................................... 6

5.1 MEMORY command ........................................................................................... 6

5.2 PHDRS command ............................................................................................... 6

5.3 SECTIONS command ......................................................................................... 7

5.3.1 Symbol assignment ................................................................................................... 7

5.3.2 Output section description ......................................................................................... 8

6 Examples ........................................................................................ 10

6.1 Controlling the location of functions and variables in the flash ......................... 10

6.1.1 Process flow ............................................................................................................ 10

6.1.2 Related examples in the software framework.......................................................... 11

6.2 Controlling the location of functions in internal RAM......................................... 11

6.2.1 Process flow ............................................................................................................ 11

6.2.2 Related examples.................................................................................................... 11

6.3 Controlling the location of variables and the heap in external SDRAM ............ 12

6.3.1 Process flow ............................................................................................................ 12

6.3.2 Details (documentation and source code) ............................................................... 15

7 Specific linker script examples..................................................... 16

8 Frequently asked questions.......................................................... 17

9 References...................................................................................... 20

10 Support ......................................................................................... 20

11 Table of Contents......................................................................... 21