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| author | Jo Van Bulck <jo.vanbulck@cs.kuleuven.be> | 2023-10-05 18:38:51 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-12-08 21:05:27 +0300 |
| commit | a4c39ef4ed43103caef80029cd30427a9ff342d8 (patch) | |
| tree | 0016e73939172a984f8a4c2379d28c8668e5b3e6 | |
| parent | 9fd552ee32c6c1e27c125016b87d295bea6faea7 (diff) | |
| download | linux-a4c39ef4ed43103caef80029cd30427a9ff342d8.tar.xz | |
selftests/sgx: Ensure test enclave buffer is entirely preserved
Attach the "used" attribute to instruct the compiler to preserve the static
encl_buffer, even if it appears it is not entirely referenced in the enclave
code, as expected by the external tests manipulating page permissions.
Signed-off-by: Jo Van Bulck <jo.vanbulck@cs.kuleuven.be>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Kai Huang <kai.huang@intel.com>
Link: https://lore.kernel.org/all/a2732938-f3db-a0af-3d68-a18060f66e79@cs.kuleuven.be/
Link: https://lore.kernel.org/all/20231005153854.25566-11-jo.vanbulck%40cs.kuleuven.be
| -rw-r--r-- | tools/testing/selftests/sgx/defines.h | 1 | ||||
| -rw-r--r-- | tools/testing/selftests/sgx/test_encl.c | 9 |
2 files changed, 6 insertions, 4 deletions
diff --git a/tools/testing/selftests/sgx/defines.h b/tools/testing/selftests/sgx/defines.h index d8587c971941..b8f482667ce1 100644 --- a/tools/testing/selftests/sgx/defines.h +++ b/tools/testing/selftests/sgx/defines.h @@ -13,6 +13,7 @@ #define __aligned(x) __attribute__((__aligned__(x))) #define __packed __attribute__((packed)) +#define __used __attribute__((used)) #include "../../../../arch/x86/include/asm/sgx.h" #include "../../../../arch/x86/include/asm/enclu.h" diff --git a/tools/testing/selftests/sgx/test_encl.c b/tools/testing/selftests/sgx/test_encl.c index 649604c526e7..7465f121fb74 100644 --- a/tools/testing/selftests/sgx/test_encl.c +++ b/tools/testing/selftests/sgx/test_encl.c @@ -5,11 +5,12 @@ #include "defines.h" /* - * Data buffer spanning two pages that will be placed first in .data - * segment. Even if not used internally the second page is needed by - * external test manipulating page permissions. + * Data buffer spanning two pages that will be placed first in the .data + * segment. Even if not used internally the second page is needed by external + * test manipulating page permissions, so mark encl_buffer as "used" to make + * sure it is entirely preserved by the compiler. */ -static uint8_t encl_buffer[8192] = { 1 }; +static uint8_t __used encl_buffer[8192] = { 1 }; enum sgx_enclu_function { EACCEPT = 0x5, |