1 files changed, 105 insertions, 0 deletions
diff --git a/libsigsegv/tests/mmaputil.h b/libsigsegv/tests/mmaputil.h
new file mode 100644
index 00000000..707b34c5
--- /dev/null
+++ b/libsigsegv/tests/mmaputil.h
@@ -0,0 +1,105 @@
+/* Some auxiliary stuff for using mmap & friends.
+   Copyright (C) 2002-2003  Bruno Haible <bruno@clisp.org>
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+
+#if defined _WIN32 && !defined __CYGWIN__
+# define HAVE_WIN32_VM
+#else
+# include "config.h"
+#endif
+
+#ifdef HAVE_WIN32_VM
+
+/* ------------------------ Windows ------------------------ */
+
+#define WIN32_LEAN_AND_MEAN /* avoid including junk */
+#include <windows.h>
+#include <winerror.h>
+#define PROT_NONE  PAGE_NOACCESS
+#define PROT_READ  PAGE_READONLY
+#define PROT_READ_WRITE PAGE_READWRITE
+
+static void *
+mmap_zeromap (void *map_addr_hint, unsigned long map_len)
+{
+  if (VirtualAlloc ((void *)((unsigned long) map_addr_hint & -0x10000),
+                    (((unsigned long) map_addr_hint + map_len - 1) | 0xffff) + 1
+                    - ((unsigned long) map_addr_hint & -0x10000),
+                    MEM_RESERVE, PAGE_NOACCESS)
+      && VirtualAlloc (map_addr_hint, map_len, MEM_COMMIT, PAGE_READWRITE))
+    return map_addr_hint;
+  else
+    return (void *)(-1);
+}
+
+int munmap (void *addr, unsigned long len)
+{
+  if (VirtualFree (addr, len, MEM_DECOMMIT))
+    return 0;
+  else
+    return -1;
+}
+
+int mprotect (void *addr, unsigned long len, int prot)
+{
+  DWORD oldprot;
+
+  if (VirtualProtect (addr, len, prot, &oldprot))
+    return 0;
+  else
+    return -1;
+}
+
+#else
+
+/* ------------------------ Unix ------------------------ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+
+#ifndef PROT_NONE
+# define PROT_NONE 0
+#endif
+#define PROT_READ_WRITE  (PROT_READ|PROT_WRITE)
+
+#if HAVE_MMAP_ANON
+# define zero_fd -1
+# define map_flags MAP_ANON | MAP_PRIVATE
+#elif HAVE_MMAP_ANONYMOUS
+# define zero_fd -1
+# define map_flags MAP_ANONYMOUS | MAP_PRIVATE
+#elif HAVE_MMAP_DEVZERO
+# include <fcntl.h>
+# ifndef MAP_FILE
+#  define MAP_FILE 0
+# endif
+static int zero_fd;
+# define map_flags MAP_FILE | MAP_PRIVATE
+#endif
+
+static void *
+mmap_zeromap (void *map_addr_hint, unsigned long map_len)
+{
+#ifdef __hpux
+  /* HP-UX 10 mmap() often fails when given a hint.  So give the OS complete
+     freedom about the address range.  */
+  return (void *) mmap ((void *) 0,    map_len, PROT_READ_WRITE, map_flags, zero_fd, 0);
+#else
+  return (void *) mmap (map_addr_hint, map_len, PROT_READ_WRITE, map_flags, zero_fd, 0);
+#endif
+}
+
+#endif