1 files changed, 81 insertions, 0 deletions

diff --git a/gdb/ppc-linux-nat.c b/gdb/ppc-linux-nat.c
index 6f11715..275de78 100644
--- a/gdb/ppc-linux-nat.c
+++ b/gdb/ppc-linux-nat.c
@@ -1739,6 +1739,64 @@ get_trigger_type (int rw)
   return t;
 }
 
+/* Insert a new masked watchpoint at ADDR using the mask MASK.
+   RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
+   or hw_access for an access watchpoint.  Returns 0 on success and throws
+   an error on failure.  */
+
+static int
+ppc_linux_insert_mask_watchpoint (struct target_ops *ops, CORE_ADDR addr,
+				  CORE_ADDR mask, int rw)
+{
+  ptid_t ptid;
+  struct lwp_info *lp;
+  struct ppc_hw_breakpoint p;
+
+  gdb_assert (have_ptrace_booke_interface ());
+
+  p.version = PPC_DEBUG_CURRENT_VERSION;
+  p.trigger_type = get_trigger_type (rw);
+  p.addr_mode = PPC_BREAKPOINT_MODE_MASK;
+  p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE;
+  p.addr = addr;
+  p.addr2 = mask;
+  p.condition_value = 0;
+
+  ALL_LWPS (lp, ptid)
+    booke_insert_point (&p, TIDGET (ptid));
+
+  return 0;
+}
+
+/* Remove a masked watchpoint at ADDR with the mask MASK.
+   RW may be hw_read for a read watchpoint, hw_write for a write watchpoint
+   or hw_access for an access watchpoint.  Returns 0 on success and throws
+   an error on failure.  */
+
+static int
+ppc_linux_remove_mask_watchpoint (struct target_ops *ops, CORE_ADDR addr,
+				  CORE_ADDR mask, int rw)
+{
+  ptid_t ptid;
+  struct lwp_info *lp;
+  struct ppc_hw_breakpoint p;
+
+  gdb_assert (have_ptrace_booke_interface ());
+
+  p.version = PPC_DEBUG_CURRENT_VERSION;
+  p.trigger_type = get_trigger_type (rw);
+  p.addr_mode = PPC_BREAKPOINT_MODE_MASK;
+  p.condition_mode = PPC_BREAKPOINT_CONDITION_NONE;
+  p.addr = addr;
+  p.addr2 = mask;
+  p.condition_value = 0;
+
+  ALL_LWPS (lp, ptid)
+    booke_remove_point (&p, TIDGET (ptid));
+
+  return 0;
+}
+
 /* Check whether we have at least one free DVC register.  */
 static int
 can_use_watchpoint_cond_accel (void)
@@ -2224,6 +2282,26 @@ ppc_linux_watchpoint_addr_within_range (struct target_ops *target,
   return start <= addr + mask && start + length - 1 >= addr;
 }
 
+/* Return the number of registers needed for a masked hardware watchpoint.  */
+
+static int
+ppc_linux_masked_watch_num_registers (struct target_ops *target,
+				      CORE_ADDR addr, CORE_ADDR mask)
+{
+  if (!have_ptrace_booke_interface ()
+	   || (booke_debug_info.features & PPC_DEBUG_FEATURE_DATA_BP_MASK) == 0)
+    return -1;
+  else if ((mask & 0xC0000000) != 0xC0000000)
+    {
+      warning (_("The given mask covers kernel address space "
+		 "and cannot be used.\n"));
+
+      return -2;
+    }
+  else
+    return 2;
+}
+
 static void
 ppc_linux_store_inferior_registers (struct target_ops *ops,
 				    struct regcache *regcache, int regno)
@@ -2438,11 +2516,14 @@ _initialize_ppc_linux_nat (void)
   t->to_region_ok_for_hw_watchpoint = ppc_linux_region_ok_for_hw_watchpoint;
   t->to_insert_watchpoint = ppc_linux_insert_watchpoint;
   t->to_remove_watchpoint = ppc_linux_remove_watchpoint;
+  t->to_insert_mask_watchpoint = ppc_linux_insert_mask_watchpoint;
+  t->to_remove_mask_watchpoint = ppc_linux_remove_mask_watchpoint;
   t->to_stopped_by_watchpoint = ppc_linux_stopped_by_watchpoint;
   t->to_stopped_data_address = ppc_linux_stopped_data_address;
   t->to_watchpoint_addr_within_range = ppc_linux_watchpoint_addr_within_range;
   t->to_can_accel_watchpoint_condition
     = ppc_linux_can_accel_watchpoint_condition;
+  t->to_masked_watch_num_registers = ppc_linux_masked_watch_num_registers;
   t->to_ranged_break_num_registers = ppc_linux_ranged_break_num_registers;
 
   t->to_read_description = ppc_linux_read_description;