linaro-swg / hello_world

Reference template to start writing a Trusted Application

Hello World - **DEPRECATED**

2018-01-01: This standalone Hello World TA has been deprecated

We have just recently created another git called optee_examples. The code from this Hello World application has been moved into that optee_examples git, so Hello World resides there as one standalone example together with a few other standalone example host/ta pairs. We will keep this git here as a reference in case someone needs it for historical reasons (links pointing here etc).

Description

This is a reference template to start writing a Trusted Application

Presentation

This example has been presented at the Linaro Connect USA 2014. The slides are available here.

Manual Build Instructions

1. Setup the OP-TEE software stack by following: https://github.com/OP-TEE/optee_os#5-repo-manifests

2. Clone this repository into $HOME/devel/optee

   git clone https://github.com/linaro-swg/hello_world.git
   cd hello_world
   

3. Define the toolchains and environment variables:

   export TEEC_EXPORT=$PWD/../optee_client/out/export
   

   If normal world user space is 64-bit:
   

   export HOST_CROSS_COMPILE=$PWD/../toolchains/aarch64/bin/aarch64-linux-gnu-
   

   If normal world user space is 32-bit:
   

   export HOST_CROSS_COMPILE=$PWD/../toolchains/aarch32/bin/arm-linux-gnueabihf-
   

   If secure world user space is 64-bit:
   

   export TA_CROSS_COMPILE=$PWD/../toolchains/aarch64/bin/aarch64-linux-gnu-
   export TA_DEV_KIT_DIR=$PWD/../optee_os/out/arm/export-ta_arm64
   

   If secure world user space is 32-bit:
   

   export TA_CROSS_COMPILE=$PWD/../toolchains/aarch32/bin/arm-linux-gnueabihf-
   export TA_DEV_KIT_DIR=$PWD/../optee_os/out/arm/export-ta_arm32
   

4. Build it!

    make