libutils: add free_wipe()

Adds function free_wipe(void *ptr) to clear a buffer before returning
it to the heap. The pattern used to overwrite the data is 0x55.
Users have to #include <stdlib_ext.h> to import the declaration.

Signed-off-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>
Reviewed-by: Joakim Bech <joakim.bech@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
4 files changed
tree: 2863de9ab363cd1fe4b076eb536763b80b355268
  1. .github/
  2. core/
  3. keys/
  4. lib/
  5. mk/
  6. scripts/
  7. ta/
  8. .gitignore
  9. .shippable.yml
  10. .travis.yml
  11. CHANGELOG.md
  12. LICENSE
  13. MAINTAINERS
  14. Makefile
  15. README.md
  16. typedefs.checkpatch
README.md

OP-TEE Trusted OS

This git contains source code for the secure side implementation of OP-TEE project.

All official OP-TEE documentation has moved to http://optee.readthedocs.io.

// OP-TEE core maintainers