Messages in this thread Patch in this message | | | From | Jo Van Bulck <> | Subject | [PATCH 3/5] selftests/sgx: Ensure correct secinfo struct alignment in test enclave. | Date | Mon, 24 Jul 2023 18:58:30 +0200 |
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Declare the secinfo struct as volatile to prevent compiler optimizations from passing an unaligned pointer to ENCLU.
Signed-off-by: Jo Van Bulck <jo.vanbulck@cs.kuleuven.be> --- tools/testing/selftests/sgx/test_encl.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c index 4e31a6c3d673..aba301abefb8 100644 --- a/tools/testing/selftests/sgx/test_encl.c +++ b/tools/testing/selftests/sgx/test_encl.c @@ -18,7 +18,8 @@ enum sgx_enclu_function { static void do_encl_emodpe(void *_op) { - struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0}; + /* declare secinfo volatile to preserve alignment */ + volatile struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0}; struct encl_op_emodpe *op = _op; secinfo.flags = op->flags; @@ -32,7 +33,8 @@ static void do_encl_emodpe(void *_op) static void do_encl_eaccept(void *_op) { - struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0}; + /* declare secinfo volatile to preserve alignment */ + volatile struct sgx_secinfo secinfo __aligned(sizeof(struct sgx_secinfo)) = {0}; struct encl_op_eaccept *op = _op; int rax; -- 2.34.1
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