2011-05-06 Sergio Durigan Junior <sergiodj@linux.vnet.ibm.com>

	    Thiago Jung Bauermann  <bauerman@br.ibm.com>

	Implement support for PowerPC BookE masked watchpoints.

gdb/
	* NEWS: Mention masked watchpoint support.  Create "Changed commands"
	section.
	* breakpoint.h (struct breakpoint_ops) <works_in_software_mode>: New
	method.  Initialize to NULL in all existing breakpoint_ops instances.
	(struct breakpoint) <hw_wp_mask>: New field.
	* breakpoint.c (is_masked_watchpoint): Add prototype.
	(update_watchpoint): Don't set b->val for masked watchpoints.  Call
	breakpoint's breakpoint_ops.works_in_software_mode if available.
	(watchpoints_triggered): Handle the case of a hardware masked
	watchpoint trigger.
	(watchpoint_check): Likewise.
	(works_in_software_mode_watchpoint): New function.
	(insert_masked_watchpoint, remove_masked_watchpoint)
	(resources_needed_masked_watchpoint)
	(works_in_software_mode_masked_watchpoint, print_it_masked_watchpoint)
	(print_one_detail_masked_watchpoint, print_mention_masked_watchpoint)
	(print_recreate_masked_watchpoint, is_masked_watchpoint): New
	functions.
	(masked_watchpoint_breakpoint_ops): New structure.
	(watch_command_1): Check for the existence of the `mask' parameter.
	Set b->ops according to the type of hardware watchpoint being created.
	* ppc-linux-nat.c (ppc_linux_insert_mask_watchpoint)
	(ppc_linux_remove_mask_watchpoint)
	(ppc_linux_masked_watch_num_registers): New functions.
	(_initialize_ppc_linux_nat): Initialize to_insert_mask_watchpoint,
	to_remove_mask_watchpoint and to_masked_watch_num_registers.
	* target.c (update_current_target): Mention to_insert_mask_watchpoint,
	to_remove_mask_watchpoint, and to_masked_watch_num_registers.
	(target_insert_mask_watchpoint, target_remove_mask_watchpoint)
	(target_masked_watch_num_registers): New functions.
	* target.h (struct target_ops) <to_insert_mask_watchpoint>,
	<to_remove_mask_watchpoint>, <to_masked_watch_num_registers>: New
	methods.
	(target_insert_mask_watchpoint, target_remove_mask_watchpoint)
	(target_masked_watch_num_registers): Add prototypes.

gdb/doc/
	* gdb.texinfo (Set Watchpoints): Document mask parameter.
	(PowerPC Embedded): Mention support of masked watchpoints.

1 files changed, 72 insertions, 0 deletions

diff --git a/gdb/target.c b/gdb/target.c
index 1e1c38e..9c522cb 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -595,6 +595,8 @@ update_current_target (void)
       /* Do not inherit to_ranged_break_num_registers.  */
       INHERIT (to_insert_watchpoint, t);
       INHERIT (to_remove_watchpoint, t);
+      /* Do not inherit to_insert_mask_watchpoint.  */
+      /* Do not inherit to_remove_mask_watchpoint.  */
       INHERIT (to_stopped_data_address, t);
       INHERIT (to_have_steppable_watchpoint, t);
       INHERIT (to_have_continuable_watchpoint, t);
@@ -602,6 +604,7 @@ update_current_target (void)
       INHERIT (to_watchpoint_addr_within_range, t);
       INHERIT (to_region_ok_for_hw_watchpoint, t);
       INHERIT (to_can_accel_watchpoint_condition, t);
+      /* Do not inherit to_masked_watch_num_registers.  */
       INHERIT (to_terminal_init, t);
       INHERIT (to_terminal_inferior, t);
       INHERIT (to_terminal_ours_for_output, t);
@@ -3518,6 +3521,75 @@ target_verify_memory (const gdb_byte *data, CORE_ADDR memaddr, ULONGEST size)
   tcomplain ();
 }
 
+/* The documentation for this function is in its prototype declaration in
+   target.h.  */
+
+int
+target_insert_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
+{
+  struct target_ops *t;
+
+  for (t = current_target.beneath; t != NULL; t = t->beneath)
+    if (t->to_insert_mask_watchpoint != NULL)
+      {
+	int ret;
+
+	ret = t->to_insert_mask_watchpoint (t, addr, mask, rw);
+
+	if (targetdebug)
+	  fprintf_unfiltered (gdb_stdlog, "\
+target_insert_mask_watchpoint (%s, %s, %d) = %d\n",
+			      core_addr_to_string (addr),
+			      core_addr_to_string (mask), rw, ret);
+
+	return ret;
+      }
+
+  return 1;
+}
+
+/* The documentation for this function is in its prototype declaration in
+   target.h.  */
+
+int
+target_remove_mask_watchpoint (CORE_ADDR addr, CORE_ADDR mask, int rw)
+{
+  struct target_ops *t;
+
+  for (t = current_target.beneath; t != NULL; t = t->beneath)
+    if (t->to_remove_mask_watchpoint != NULL)
+      {
+	int ret;
+
+	ret = t->to_remove_mask_watchpoint (t, addr, mask, rw);
+
+	if (targetdebug)
+	  fprintf_unfiltered (gdb_stdlog, "\
+target_remove_mask_watchpoint (%s, %s, %d) = %d\n",
+			      core_addr_to_string (addr),
+			      core_addr_to_string (mask), rw, ret);
+
+	return ret;
+      }
+
+  return 1;
+}
+
+/* The documentation for this function is in its prototype declaration
+   in target.h.  */
+
+int
+target_masked_watch_num_registers (CORE_ADDR addr, CORE_ADDR mask)
+{
+  struct target_ops *t;
+
+  for (t = current_target.beneath; t != NULL; t = t->beneath)
+    if (t->to_masked_watch_num_registers != NULL)
+      return t->to_masked_watch_num_registers (t, addr, mask);
+
+  return -1;
+}
+
 /* The documentation for this function is in its prototype declaration
    in target.h.  */