diff options
Diffstat (limited to 'tools/testing/selftests/arm64')
| -rw-r--r-- | tools/testing/selftests/arm64/fp/sve-ptrace.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/tools/testing/selftests/arm64/fp/sve-ptrace.c b/tools/testing/selftests/arm64/fp/sve-ptrace.c index 2d130fedc019..31a2c2fc529d 100644 --- a/tools/testing/selftests/arm64/fp/sve-ptrace.c +++ b/tools/testing/selftests/arm64/fp/sve-ptrace.c @@ -46,6 +46,15 @@ static int do_child(void) return EXIT_SUCCESS; } +static int get_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd) +{ + struct iovec iov; + + iov.iov_base = fpsimd; + iov.iov_len = sizeof(*fpsimd); + return ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov); +} + static struct user_sve_header *get_sve(pid_t pid, void **buf, size_t *size) { struct user_sve_header *sve; @@ -122,7 +131,7 @@ static int do_parent(pid_t child) void *svebuf = NULL, *newsvebuf; size_t svebufsz = 0, newsvebufsz; struct user_sve_header *sve, *new_sve; - struct user_fpsimd_state *fpsimd; + struct user_fpsimd_state *fpsimd, new_fpsimd; unsigned int i, j; unsigned char *p; unsigned int vq; @@ -221,7 +230,22 @@ static int do_parent(pid_t child) goto error; } - /* Zero the first SVE Z register */ + /* Verify via the FPSIMD regset */ + if (get_fpsimd(pid, &new_fpsimd)) { + int e = errno; + + ksft_test_result_fail("get_fpsimd(): %s\n", + strerror(errno)); + if (e == ESRCH) + goto disappeared; + + goto error; + } + if (memcmp(fpsimd, &new_fpsimd, sizeof(*fpsimd)) == 0) + ksft_test_result_pass("get_fpsimd() gave same state\n"); + else + ksft_test_result_fail("get_fpsimd() gave different state\n"); + vq = sve_vq_from_vl(sve->vl); newsvebufsz = SVE_PT_SVE_ZREG_OFFSET(vq, 1); |