selftests/powerpc: Move get_auxv_entry() to harness.c

[firefly-linux-kernel-4.4.55.git] / tools / testing / selftests / powerpc / harness.c

diff --git a/tools/testing/selftests/powerpc/harness.c b/tools/testing/selftests/powerpc/harness.c
index 8ebc58a09311da9a591a7c8efd1fb2025049c2fe..f7997affd14364e349503ffb443b7ddb8d26284b 100644 (file)
--- a/tools/testing/selftests/powerpc/harness.c
+++ b/tools/testing/selftests/powerpc/harness.c
@@ -11,6 +11,10 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include <elf.h>
+#include <fcntl.h>
+#include <link.h>
+#include <sys/stat.h>
 
 #include "subunit.h"
 #include "utils.h"
@@ -112,3 +116,46 @@ int test_harness(int (test_function)(void), char *name)
 
        return rc;
 }
+
+static char auxv[4096];
+
+void *get_auxv_entry(int type)
+{
+       ElfW(auxv_t) *p;
+       void *result;
+       ssize_t num;
+       int fd;
+
+       fd = open("/proc/self/auxv", O_RDONLY);
+       if (fd == -1) {
+               perror("open");
+               return NULL;
+       }
+
+       result = NULL;
+
+       num = read(fd, auxv, sizeof(auxv));
+       if (num < 0) {
+               perror("read");
+               goto out;
+       }
+
+       if (num > sizeof(auxv)) {
+               printf("Overflowed auxv buffer\n");
+               goto out;
+       }
+
+       p = (ElfW(auxv_t) *)auxv;
+
+       while (p->a_type != AT_NULL) {
+               if (p->a_type == type) {
+                       result = (void *)p->a_un.a_val;
+                       break;
+               }
+
+               p++;
+       }
+out:
+       close(fd);
+       return result;
+}