On Mon, Feb 01, 2021 at 09:26:49PM +0800, Tianjia Zhang wrote:
Simplify the sgx code implemntation by using library function getauxval() instead of a custom function to get the base address of vDSO.
Signed-off-by: Tianjia Zhang tianjia.zhang@linux.alibaba.com
Reviewed-by: Jarkko Sakkinen jarkko@kernel.org
This needs also ack from Shuah.
/Jarkko
tools/testing/selftests/sgx/main.c | 24 ++++-------------------- 1 file changed, 4 insertions(+), 20 deletions(-)
diff --git a/tools/testing/selftests/sgx/main.c b/tools/testing/selftests/sgx/main.c index 724cec700926..5167505fbb46 100644 --- a/tools/testing/selftests/sgx/main.c +++ b/tools/testing/selftests/sgx/main.c @@ -15,6 +15,7 @@ #include <sys/stat.h> #include <sys/time.h> #include <sys/types.h> +#include <sys/auxv.h> #include "defines.h" #include "main.h" #include "../kselftest.h" @@ -28,24 +29,6 @@ struct vdso_symtab { Elf64_Word *elf_hashtab; }; -static void *vdso_get_base_addr(char *envp[]) -{
- Elf64_auxv_t *auxv;
- int i;
- for (i = 0; envp[i]; i++)
;- auxv = (Elf64_auxv_t *)&envp[i + 1];
- for (i = 0; auxv[i].a_type != AT_NULL; i++) {
if (auxv[i].a_type == AT_SYSINFO_EHDR)return (void *)auxv[i].a_un.a_val;- }
- return NULL;
-}
static Elf64_Dyn *vdso_get_dyntab(void *addr) { Elf64_Ehdr *ehdr = addr; @@ -162,7 +145,7 @@ static int user_handler(long rdi, long rsi, long rdx, long ursp, long r8, long r return 0; } -int main(int argc, char *argv[], char *envp[]) +int main(int argc, char *argv[]) { struct sgx_enclave_run run; struct vdso_symtab symtab; @@ -203,7 +186,8 @@ int main(int argc, char *argv[], char *envp[]) memset(&run, 0, sizeof(run)); run.tcs = encl.encl_base;
- addr = vdso_get_base_addr(envp);
- /* Get vDSO base address */
- addr = (void *)getauxval(AT_SYSINFO_EHDR); if (!addr) goto err;
2.19.1.3.ge56e4f7