Update.

	* posix/Makefile (tests): Add tst-mmap.
	* posix/tst-mmap.c: New file.

	* sysdeps/unix/sysv/linux/i386/mmap64.S: Pop registers after mmap2
	call before handling error.

1 files changed, 196 insertions, 0 deletions

diff --git a/posix/tst-mmap.c b/posix/tst-mmap.c
new file mode 100644
index 0000000..0332828
--- /dev/null
+++ b/posix/tst-mmap.c
@@ -0,0 +1,196 @@
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/mman.h>
+
+
+int
+main (void)
+{
+  int result = 0;
+  FILE *fp;
+  int c;
+  char buf[1000];
+  int fd;
+  char *ptr;
+  size_t ps = sysconf (_SC_PAGESIZE);
+  void *mem;
+
+  /* Create a file and put some data in it.  */
+  fp = tmpfile ();
+  if (fp == NULL)
+    {
+      printf ("Cannot create temporary file: %m\n");
+      return 1;
+    }
+  fd = fileno (fp);
+
+  for (c = 0; c < sizeof (buf); ++c)
+    buf[c] = '0' + (c % 10);
+
+  for (c = 0; c < 20; ++c)
+    if (fwrite (buf, 1, sizeof (buf), fp) != sizeof (buf))
+      {
+	printf ("`fwrite' failed: %m\n");
+	return 1;
+      }
+  assert (ps + 1000 < c * sizeof (buf));
+
+  /* First try something which is not allowed: map at an offset which is
+     not module the pagesize.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Try the same for mmap64.  */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* And the same for private mapping.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Try the same for mmap64.  */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_PRIVATE, fd, ps - 1);
+  if (ptr != MAP_FAILED)
+    {
+      puts ("mapping at offset with mod pagesize != 0 succeeded!");
+      result = 1;
+    }
+  else if (errno != EINVAL && errno != ENOSYS)
+    {
+      puts ("wrong error value for mapping at offset with mod pagesize != 0: %m (should be EINVAL)");
+      result = 1;
+    }
+
+  /* Get a valid address.  */
+  mem = malloc (2 * ps);
+  if (mem != NULL)
+    {
+      /* Now we map at an address which is not mod pagesize.  */
+      ptr = mmap (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* Try the same for mmap64.  */
+      ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_SHARED | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* And again for MAP_PRIVATE.  */
+      ptr = mmap (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      /* Try the same for mmap64.  */
+      ptr = mmap64 (mem + 1, 1000, PROT_READ, MAP_PRIVATE | MAP_FIXED, fd, ps);
+      if (ptr != MAP_FAILED)
+	{
+	  puts ("mapping at address with mod pagesize != 0 succeeded!");
+	  result = 1;
+	}
+      else  if (errno != EINVAL && errno != ENOSYS)
+	{
+	  puts ("wrong error value for mapping at address with mod pagesize != 0: %m (should be EINVAL)");
+	  result = 1;
+	}
+
+      free (mem);
+    }
+
+  /* Now map the memory and see whether the content of the mapped area
+     is correct.  */
+  ptr = mmap (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
+  if (ptr == MAP_FAILED)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("cannot mmap file: %m\n");
+	  result = 1;
+	}
+    }
+  else
+    {
+      for (c = ps; c < ps + 1000; ++c)
+	if (ptr[c - ps] != '0' + (c % 10))
+	  {
+	    printf ("wrong data mapped at offset %d\n", c);
+	    result = 1;
+	  }
+    }
+
+  /* And for mmap64. */
+  ptr = mmap64 (NULL, 1000, PROT_READ, MAP_SHARED, fd, ps);
+  if (ptr == MAP_FAILED)
+    {
+      if (errno != ENOSYS)
+	{
+	  printf ("cannot mmap file: %m\n");
+	  result = 1;
+	}
+    }
+  else
+    {
+      for (c = ps; c < ps + 1000; ++c)
+	if (ptr[c - ps] != '0' + (c % 10))
+	  {
+	    printf ("wrong data mapped at offset %d\n", c);
+	    result = 1;
+	  }
+    }
+
+  /* That's it.  */
+  return result;
+}