1 files changed, 129 insertions, 0 deletions
diff --git a/sysdeps/powerpc/tst-tlsifunc.c b/sysdeps/powerpc/tst-tlsifunc.c
new file mode 100644
index 0000000000..75cfb3e656
--- /dev/null
+++ b/sysdeps/powerpc/tst-tlsifunc.c
@@ -0,0 +1,129 @@
+/* Test if an executable can read from the TLS from an STT_GNU_IFUNC resolver.
+   Copyright (C) 2017-2018 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <libc-symbols.h>
+#include <tls-macros.h>
+
+__thread int bar;
+static int *bar_ptr = NULL;
+
+static uint32_t resolver_platform = 0;
+
+int foo (void);
+
+int tcb_test (void);
+
+/* Offsets copied from tcb-offsets.h.  */
+#ifdef __powerpc64__
+# define __TPREG     "r13"
+# define __ATPLATOFF -28764
+#else
+# define __TPREG     "r2"
+# define __ATPLATOFF -28724
+#endif
+
+uint32_t
+get_platform (void)
+{
+  register unsigned long tp __asm__ (__TPREG);
+  uint32_t tmp;
+
+  __asm__  ("lwz %0,%1(%2)\n"
+	    : "=r" (tmp)
+	    : "i" (__ATPLATOFF), "b" (tp));
+
+  return tmp;
+}
+
+void
+init_foo (void)
+{
+  bar_ptr = TLS_GD (bar);
+}
+
+int
+my_foo (void)
+{
+  printf ("&bar = %p and bar_ptr = %p.\n", &bar, bar_ptr);
+  return bar_ptr != NULL;
+}
+
+__ifunc (foo, foo, my_foo, void, init_foo);
+
+void
+init_tcb_test (void)
+{
+  resolver_platform = get_platform ();
+}
+
+int
+my_tcb_test (void)
+{
+  printf ("resolver_platform = 0x%"PRIx32
+	  " and current platform = 0x%"PRIx32".\n",
+	  resolver_platform, get_platform ());
+  return resolver_platform != 0;
+}
+
+__ifunc (tcb_test, tcb_test, my_tcb_test, void, init_tcb_test);
+
+static int
+do_test (void)
+{
+  int ret = 0;
+
+  if (foo ())
+    printf ("PASS: foo IFUNC resolver called once.\n");
+  else
+    {
+      printf ("FAIL: foo IFUNC resolver not called once.\n");
+      ret = 1;
+    }
+
+  if (&bar == bar_ptr)
+    printf ("PASS: bar address read from IFUNC resolver is correct.\n");
+  else
+    {
+      printf ("FAIL: bar address read from IFUNC resolver is incorrect.\n");
+      ret = 1;
+    }
+
+  if (tcb_test ())
+    printf ("PASS: tcb_test IFUNC resolver called once.\n");
+  else
+    {
+      printf ("FAIL: tcb_test IFUNC resolver not called once.\n");
+      ret = 1;
+    }
+
+  if (resolver_platform == get_platform ())
+    printf ("PASS: platform read from IFUNC resolver is correct.\n");
+  else
+    {
+      printf ("FAIL: platform read from IFUNC resolver is incorrect.\n");
+      ret = 1;
+    }
+
+  return ret;
+}
+
+#include <support/test-driver.c>