This application note explains how to set up the stack size for a user-space application.

The stack size can be changed using the fdpichdr utility. This utility is provided as a part of the Emcraft distribution (linux-cortexm-<target>-<release>/A2F/fdpichdr/). Activate the cross-build environment (. ./ACTIVATE.sh) before using it:

$ cd linux-cortexm-<target>-<release>
$ . ./ACTIVATE.sh
$ fdpichdr --help
Usage: fdpichdr [options] <elfs>

Options: -[s:vqhV]
  -s, --stack-size <size>         * Set the stack size
  -v, --verbose                   * Make a lot of noise
  -q, --quiet                     * Only show errors
  -h, --help                      * Print this help and exit
  -V, --version                   * Print version and exit 

Let's for example set the stack size of the lcdtest application to 32KB:

$ cd projects/rootfs fdpichdr -vs $((32 * 1024)) lcdtest/lcdtest
lcdtest/lcdtest: setting stack size to 32768 (0x8000)
        skipping program header 0x70000001
        skipping program header 0x6
        skipping program header 0x3
        skipping program header 0x1
        skipping program header 0x1
        skipping program header 0x2
        Found PT_GNU_STACK; changing value 0x8000 -> 0x8000
$