Clear non-significant bits of address on memory access

[deliverable/binutils-gdb.git] / gdb / gdbarch.c

diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index 007392cd6a7f8438401e8e16e1ca317c9740f4ac..8177f0539c1160921011116c579f43ce97439be8 100644 (file)
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -259,6 +259,7 @@ struct gdbarch
   int frame_red_zone_size;
   gdbarch_convert_from_func_ptr_addr_ftype *convert_from_func_ptr_addr;
   gdbarch_addr_bits_remove_ftype *addr_bits_remove;
+  int significant_addr_bit;
   gdbarch_software_single_step_ftype *software_single_step;
   gdbarch_single_step_through_delay_ftype *single_step_through_delay;
   gdbarch_print_insn_ftype *print_insn;
@@ -618,6 +619,8 @@ verify_gdbarch (struct gdbarch *gdbarch)
   /* Skip verify of stabs_argument_has_addr, invalid_p == 0 */
   /* Skip verify of convert_from_func_ptr_addr, invalid_p == 0 */
   /* Skip verify of addr_bits_remove, invalid_p == 0 */
+  if (gdbarch->significant_addr_bit == 0)
+    gdbarch->significant_addr_bit = gdbarch_addr_bit (gdbarch);
   /* Skip verify of software_single_step, has predicate.  */
   /* Skip verify of single_step_through_delay, has predicate.  */
   /* Skip verify of print_insn, invalid_p == 0 */
@@ -1324,6 +1327,9 @@ gdbarch_dump (struct gdbarch *gdbarch, struct ui_file *file)
   fprintf_unfiltered (file,
                       "gdbarch_dump: short_bit = %s\n",
                       plongest (gdbarch->short_bit));
+  fprintf_unfiltered (file,
+                      "gdbarch_dump: significant_addr_bit = %s\n",
+                      plongest (gdbarch->significant_addr_bit));
   fprintf_unfiltered (file,
                       "gdbarch_dump: gdbarch_single_step_through_delay_p() = %d\n",
                       gdbarch_single_step_through_delay_p (gdbarch));
@@ -3215,6 +3221,22 @@ set_gdbarch_addr_bits_remove (struct gdbarch *gdbarch,
   gdbarch->addr_bits_remove = addr_bits_remove;
 }
 
+int
+gdbarch_significant_addr_bit (struct gdbarch *gdbarch)
+{
+  gdb_assert (gdbarch != NULL);
+  if (gdbarch_debug >= 2)
+    fprintf_unfiltered (gdb_stdlog, "gdbarch_significant_addr_bit called\n");
+  return gdbarch->significant_addr_bit;
+}
+
+void
+set_gdbarch_significant_addr_bit (struct gdbarch *gdbarch,
+                                  int significant_addr_bit)
+{
+  gdbarch->significant_addr_bit = significant_addr_bit;
+}
+
 int
 gdbarch_software_single_step_p (struct gdbarch *gdbarch)
 {