Code Segments

A few bits of information on code segments and linking.

Note: This HowTo uses Xilinx EDK version 9.1i

Code Segments

Below is a list of some of the code segments that GCC can produce with descriptions of their purpose.

Below is an example taken from the Xilinx application note xapp642. It shows how different variables relate to code segments.

#include <stdio.h>

int array_data[10] = {0,1,2,3,4,5,6,7,8,9};

const int array_const[10] = {9,8,7,6,5,4,3,2,1,0};

int main(void)

{

   int i;

   i = i + 10;

   printf("%d\n", array_data[0]);

   array_data[0] = array_const[0];

   printf("%d\n",array_data[0]);

   return 0;

}

Further Reading

Suggestions for further reading.

• Xilinx xapp642 - Relocating Code and Data for Embedded Systems