CA           TEEC_InvokeCommand()
                               |
                               |
                      PTA_CMD_GCOV_CORE_DUMP_ALL
                               |
                               v
     PTA gcov      gcov.c:pta_gcov_core_dump_all()
                               |
                               |
                               |
                               v
core  libgcov    gcov.c:gcov_dump_all_coverage_data()
                               |
                               |
                               v
                gcov_gcc_4_7.c:dump_all_coverage_data()
                               |
                               |
                               v
          core_dump_coverage.c:core_direct_dump_data()
                               |
                               |
                               v
                gcov.c:gcov_dump_coverage_data()
                               |
                               |
     core                      |
                               v
                tee_gcov_writer.c:tee_gcov_writer()
                               |
                               |
                       OPTEE_RPC_CMD_GCOV
                               |
     tee_supplicant            v

               Handle the RPC to write coverage data in REE FS