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-rw-r--r--tools/testing/selftests/powerpc/include/utils.h6
-rw-r--r--tools/testing/selftests/powerpc/utils.c53
2 files changed, 41 insertions, 18 deletions
diff --git a/tools/testing/selftests/powerpc/include/utils.h b/tools/testing/selftests/powerpc/include/utils.h
index 53405e8a52ab..735815b3ad7f 100644
--- a/tools/testing/selftests/powerpc/include/utils.h
+++ b/tools/testing/selftests/powerpc/include/utils.h
@@ -24,7 +24,11 @@ typedef uint8_t u8;
void test_harness_set_timeout(uint64_t time);
int test_harness(int (test_function)(void), char *name);
-extern void *get_auxv_entry(int type);
+
+int read_auxv(char *buf, ssize_t buf_size);
+void *find_auxv_entry(int type, char *auxv);
+void *get_auxv_entry(int type);
+
int pick_online_cpu(void);
static inline bool have_hwcap(unsigned long ftr)
diff --git a/tools/testing/selftests/powerpc/utils.c b/tools/testing/selftests/powerpc/utils.c
index dcf74184bfd0..d46916867a6f 100644
--- a/tools/testing/selftests/powerpc/utils.c
+++ b/tools/testing/selftests/powerpc/utils.c
@@ -19,45 +19,64 @@
static char auxv[4096];
-void *get_auxv_entry(int type)
+int read_auxv(char *buf, ssize_t buf_size)
{
- ElfW(auxv_t) *p;
- void *result;
ssize_t num;
- int fd;
+ int rc, fd;
fd = open("/proc/self/auxv", O_RDONLY);
if (fd == -1) {
perror("open");
- return NULL;
+ return -errno;
}
- result = NULL;
-
- num = read(fd, auxv, sizeof(auxv));
+ num = read(fd, buf, buf_size);
if (num < 0) {
perror("read");
+ rc = -EIO;
goto out;
}
- if (num > sizeof(auxv)) {
- printf("Overflowed auxv buffer\n");
+ if (num > buf_size) {
+ printf("overflowed auxv buffer\n");
+ rc = -EOVERFLOW;
goto out;
}
+ rc = 0;
+out:
+ close(fd);
+ return rc;
+}
+
+void *find_auxv_entry(int type, char *auxv)
+{
+ ElfW(auxv_t) *p;
+
p = (ElfW(auxv_t) *)auxv;
while (p->a_type != AT_NULL) {
- if (p->a_type == type) {
- result = (void *)p->a_un.a_val;
- break;
- }
+ if (p->a_type == type)
+ return p;
p++;
}
-out:
- close(fd);
- return result;
+
+ return NULL;
+}
+
+void *get_auxv_entry(int type)
+{
+ ElfW(auxv_t) *p;
+
+ if (read_auxv(auxv, sizeof(auxv)))
+ return NULL;
+
+ p = find_auxv_entry(type, auxv);
+ if (p)
+ return (void *)p->a_un.a_val;
+
+ return NULL;
}
int pick_online_cpu(void)