Setting the Stack Size for a User-Space Application (uClinux)

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 ${INSTALL_ROOT}/tools/bin/fdpichdr). Activate the cross-build environment (. ./ACTIVATE.sh) before using it:

$ cd <path_to_distribution>
$ . ./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 0x1
        skipping program header 0x1
        Found PT_GNU_STACK; changing value 0x2000 -> 0x8000
        skipping program header 0x6
$