* gdb_bfd.c (struct gdb_bfd_data) <crc_computed, crc>:

	New fields.
	(get_file_crc): Move from symfile.c.
	(gdb_bfd_crc): New function.
	* gdb_bfd.h (gdb_bfd_crc): Declare.
	* objfiles.h (struct objfile) <crc32, crc32_p>: Remove.
	* symfile.c (get_file_crc): Move to gdb_bfd.c.
	(separate_debug_file_exists): Use gdb_bfd_crc.

1 files changed, 58 insertions, 0 deletions

diff --git a/gdb/gdb_bfd.c b/gdb/gdb_bfd.c
index d4540b9e45e..53c3a1244e0 100644
--- a/gdb/gdb_bfd.c
+++ b/gdb/gdb_bfd.c
@@ -81,6 +81,12 @@ struct gdb_bfd_data
   /* The mtime of the BFD at the point the cache entry was made.  */
   time_t mtime;
 
+  /* This is true if we have successfully computed the file's CRC.  */
+  unsigned int crc_computed : 1;
+
+  /* The file's CRC.  */
+  unsigned long crc;
+
   /* If the BFD comes from an archive, this points to the archive's
      BFD.  Otherwise, this is NULL.  */
   bfd *archive_bfd;
@@ -413,6 +419,58 @@ gdb_bfd_map_section (asection *sectp, bfd_size_type *size)
   return descriptor->data;
 }
 
+/* Return 32-bit CRC for ABFD.  If successful store it to *FILE_CRC_RETURN and
+   return 1.  Otherwise print a warning and return 0.  ABFD seek position is
+   not preserved.  */
+
+static int
+get_file_crc (bfd *abfd, unsigned long *file_crc_return)
+{
+  unsigned long file_crc = 0;
+
+  if (bfd_seek (abfd, 0, SEEK_SET) != 0)
+    {
+      warning (_("Problem reading \"%s\" for CRC: %s"),
+	       bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+      return 0;
+    }
+
+  for (;;)
+    {
+      gdb_byte buffer[8 * 1024];
+      bfd_size_type count;
+
+      count = bfd_bread (buffer, sizeof (buffer), abfd);
+      if (count == (bfd_size_type) -1)
+	{
+	  warning (_("Problem reading \"%s\" for CRC: %s"),
+		   bfd_get_filename (abfd), bfd_errmsg (bfd_get_error ()));
+	  return 0;
+	}
+      if (count == 0)
+	break;
+      file_crc = bfd_calc_gnu_debuglink_crc32 (file_crc, buffer, count);
+    }
+
+  *file_crc_return = file_crc;
+  return 1;
+}
+
+/* See gdb_bfd.h.  */
+
+int
+gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out)
+{
+  struct gdb_bfd_data *gdata = bfd_usrdata (abfd);
+
+  if (!gdata->crc_computed)
+    gdata->crc_computed = get_file_crc (abfd, &gdata->crc);
+
+  if (gdata->crc_computed)
+    *crc_out = gdata->crc;
+  return gdata->crc_computed;
+}
+
 
 
 /* See gdb_bfd.h.  */