1 files changed, 79 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/dl-osinfo.h b/REORG.TODO/sysdeps/unix/sysv/linux/dl-osinfo.h
new file mode 100644
index 0000000000..823cd8224d
--- /dev/null
+++ b/REORG.TODO/sysdeps/unix/sysv/linux/dl-osinfo.h
@@ -0,0 +1,79 @@
+/* Operating system specific code for generic dynamic loader functions.  Linux.
+   Copyright (C) 2000-2017 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 <dl-sysdep.h>
+#include <endian.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <not-cancel.h>
+
+#ifndef MIN
+# define MIN(a,b) (((a)<(b))?(a):(b))
+#endif
+
+#define DL_SYSDEP_OSCHECK(FATAL)					      \
+  do {									      \
+    /* Test whether the kernel is new enough.  This test is only performed    \
+       if the library is not compiled to run on all kernels.  */	      \
+									      \
+    int version = _dl_discover_osversion ();				      \
+    if (__glibc_likely (version >= 0))					      \
+      {									      \
+	if (__builtin_expect (GLRO(dl_osversion) == 0, 1)		      \
+	    || GLRO(dl_osversion) > version)				      \
+	  GLRO(dl_osversion) = version;					      \
+									      \
+	/* Now we can test with the required version.  */		      \
+	if (__LINUX_KERNEL_VERSION > 0 && version < __LINUX_KERNEL_VERSION)   \
+	  /* Not sufficent.  */						      \
+	  FATAL ("FATAL: kernel too old\n");				      \
+      }									      \
+    else if (__LINUX_KERNEL_VERSION > 0)				      \
+      FATAL ("FATAL: cannot determine kernel version\n");		      \
+  } while (0)
+
+static inline uintptr_t __attribute__ ((always_inline))
+_dl_setup_stack_chk_guard (void *dl_random)
+{
+  union
+  {
+    uintptr_t num;
+    unsigned char bytes[sizeof (uintptr_t)];
+  } ret;
+
+  /* We need in the moment only 8 bytes on 32-bit platforms and 16
+     bytes on 64-bit platforms.  Therefore we can use the data
+     directly and not use the kernel-provided data to seed a PRNG.  */
+  memcpy (ret.bytes, dl_random, sizeof (ret));
+#if BYTE_ORDER == LITTLE_ENDIAN
+  ret.num &= ~(uintptr_t) 0xff;
+#elif BYTE_ORDER == BIG_ENDIAN
+  ret.num &= ~((uintptr_t) 0xff << (8 * (sizeof (ret) - 1)));
+#else
+# error "BYTE_ORDER unknown"
+#endif
+  return ret.num;
+}
+
+static inline uintptr_t __attribute__ ((always_inline))
+_dl_setup_pointer_guard (void *dl_random, uintptr_t stack_chk_guard)
+{
+  uintptr_t ret;
+  memcpy (&ret, (char *) dl_random + sizeof (ret), sizeof (ret));
+  return ret;
+}