2004-10-08 Jeff Johnston <jjohnstn@redhat.com>

        * target.h (to_stopped_data_address): Change prototype to
        take a CORE_ADDR pointer and return an int.
        * target.c (update_current_target): Change to_stopped_data_address
        to match new prototype.
        (debug_to_stopped_data_address): Change appropriately.
        * breakpoint.c (bpstat_stop_status): Change call to
        target_stopped_data_address to use new prototype.
        * frv-tdep.c (frv_have_stopped_data_address): New function.
        (frv_stopped_data_address): Change to new prototype and
        functionality.
        * ia64-linux-nat.c (ia64_stopped_data_address): Change to new
        prototype and functionality.
        (ia64_stopped_by_watchpoint): New function.
        * i386-nat.c (i386_stopped_data_address): Change to new
        prototype and functionality.
        (i386_stopped_by_watchpoint): New function.
        * remote.c (remote_stopped_data_address): Change to new prototype
        and functionality.
        * remote-m32r-sdi.c (m32r_stopped_data_address): Ditto.
        * config/frv/tm-frv.h (frv_stopped_data_address): Change prototype.
        (STOPPED_BY_WATCHPOINT): Change to use frv_have_stopped_data_address.
        * config/i386/nm-i386.h (STOPPED_BY_WATCHPOINT): Change to use
        new i386_stopped_by_watchpoint function.
        (i386_stopped_by_watchpoint): New prototype.
        (i386_stoppped_data_address): Change to new prototype.
        * config/ia64/nm-linux.h (STOPPED_BY_WATCHPOINT): Change to use
        new ia64_stopped_by_watchpoint function.
        (ia64_stopped_by_watchpoint): New prototype.
        (ia64_stopped_data_address): Ditto.

12 files changed, 146 insertions, 47 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index aac4335..85d1d41 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,35 @@
+2004-10-08  Jeff Johnston  <jjohnstn@redhat.com>
+
+	* target.h (to_stopped_data_address): Change prototype to
+	take a CORE_ADDR pointer and return an int.
+	* target.c (update_current_target): Change to_stopped_data_address
+	to match new prototype.
+	(debug_to_stopped_data_address): Change appropriately.
+	* breakpoint.c (bpstat_stop_status): Change call to
+	target_stopped_data_address to use new prototype.
+	* frv-tdep.c (frv_have_stopped_data_address): New function.
+	(frv_stopped_data_address): Change to new prototype and
+	functionality.
+	* ia64-linux-nat.c (ia64_stopped_data_address): Change to new
+	prototype and functionality.
+	(ia64_stopped_by_watchpoint): New function.
+	* i386-nat.c (i386_stopped_data_address): Change to new
+	prototype and functionality.
+	(i386_stopped_by_watchpoint): New function.
+	* remote.c (remote_stopped_data_address): Change to new prototype
+	and functionality.
+	* remote-m32r-sdi.c (m32r_stopped_data_address): Ditto.
+	* config/frv/tm-frv.h (frv_stopped_data_address): Change prototype.
+	(STOPPED_BY_WATCHPOINT): Change to use frv_have_stopped_data_address.
+	* config/i386/nm-i386.h (STOPPED_BY_WATCHPOINT): Change to use
+	new i386_stopped_by_watchpoint function.
+	(i386_stopped_by_watchpoint): New prototype.
+	(i386_stoppped_data_address): Change to new prototype.
+	* config/ia64/nm-linux.h (STOPPED_BY_WATCHPOINT): Change to use
+	new ia64_stopped_by_watchpoint function.
+	(ia64_stopped_by_watchpoint): New prototype.
+	(ia64_stopped_data_address): Ditto.
+
 2004-10-08  Paul Hilfinger  <Hilfinger@gnat.com>
 
 	* ada-typeprint.c (ada_print_type): Use int_string for printing
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index 7e9e669..eac34b8 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -2741,8 +2741,7 @@ bpstat_stop_status (CORE_ADDR bp_addr, ptid_t ptid, int stopped_by_watchpoint)
 	struct value *v;
 	int found = 0;
 
-	addr = target_stopped_data_address ();
-	if (addr == 0)
+	if (!target_stopped_data_address (&current_target, &addr))
 	  continue;
 	for (v = b->val_chain; v; v = v->next)
 	  {
diff --git a/gdb/config/frv/tm-frv.h b/gdb/config/frv/tm-frv.h
index b8f677d..4374872 100644
--- a/gdb/config/frv/tm-frv.h
+++ b/gdb/config/frv/tm-frv.h
@@ -1,5 +1,5 @@
 /* Target definitions for the Fujitsu FR-V, for GDB, the GNU Debugger.
-   Copyright 2000 Free Software Foundation, Inc.
+   Copyright 2000, 2004 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -33,10 +33,11 @@ extern int frv_check_watch_resources (int type, int cnt, int ot);
 #define STOPPED_BY_WATCHPOINT(W) \
    ((W).kind == TARGET_WAITKIND_STOPPED \
    && (W).value.sig == TARGET_SIGNAL_TRAP \
-   && (frv_stopped_data_address() != ((CORE_ADDR)0)))
-extern CORE_ADDR frv_stopped_data_address(void);
+   && frv_have_stopped_data_address())
+extern int frv_have_stopped_data_address(void);
 
 /* Use these macros for watchpoint insertion/deletion.  */
-#define target_stopped_data_address() frv_stopped_data_address()
+#define target_stopped_data_address(target, x) frv_stopped_data_address(x)
+extern int frv_stopped_data_address(CORE_ADDR *addr_p);
 
 #include "solib.h"		/* Include support for shared libraries.  */
diff --git a/gdb/config/i386/nm-i386.h b/gdb/config/i386/nm-i386.h
index 2692cae..265c8e0 100644
--- a/gdb/config/i386/nm-i386.h
+++ b/gdb/config/i386/nm-i386.h
@@ -47,10 +47,10 @@ extern int i386_region_ok_for_watchpoint (CORE_ADDR addr, int len);
    triggered.  */
 extern int i386_stopped_by_hwbp (void);
 
-/* If the inferior has some break/watchpoint that triggered, return
-   the address associated with that break/watchpoint.  Otherwise,
-   return zero.  */
-extern CORE_ADDR i386_stopped_data_address (void);
+/* If the inferior has some break/watchpoint that triggered, set
+   the address associated with that break/watchpoint and return
+   true.  Otherwise, return false.  */
+extern int i386_stopped_data_address (CORE_ADDR *);
 
 /* Insert a hardware-assisted breakpoint at address ADDR.  SHADOW is
    unused.  Return 0 on success, EBUSY on failure.  */
@@ -91,9 +91,11 @@ extern int  i386_remove_hw_breakpoint (CORE_ADDR addr, void *shadow);
 
 #define HAVE_CONTINUABLE_WATCHPOINT 1
 
-#define STOPPED_BY_WATCHPOINT(W)       (i386_stopped_data_address () != 0)
+extern int i386_stopped_by_watchpoint (void);
 
-#define target_stopped_data_address()  i386_stopped_data_address ()
+#define STOPPED_BY_WATCHPOINT(W)       (i386_stopped_by_watchpoint () != 0)
+
+#define target_stopped_data_address(target, x)  i386_stopped_data_address(x)
 
 /* Use these macros for watchpoint insertion/removal.  */
 
diff --git a/gdb/config/ia64/nm-linux.h b/gdb/config/ia64/nm-linux.h
index 1a5539a..fb8675f 100644
--- a/gdb/config/ia64/nm-linux.h
+++ b/gdb/config/ia64/nm-linux.h
@@ -58,8 +58,12 @@ extern int ia64_cannot_store_register (int regno);
 #define HAVE_STEPPABLE_WATCHPOINT 1
 
 #define STOPPED_BY_WATCHPOINT(W) \
-  ia64_linux_stopped_by_watchpoint (inferior_ptid)
-extern CORE_ADDR ia64_linux_stopped_by_watchpoint (ptid_t ptid);
+  ia64_linux_stopped_by_watchpoint ()
+extern int ia64_linux_stopped_by_watchpoint ();
+
+#define target_stopped_data_address(target, x) \
+  ia64_linux_stopped_data_address(x)
+extern int ia64_linux_stopped_data_address (CORE_ADDR *addr_p);
 
 #define target_insert_watchpoint(addr, len, type) \
   ia64_linux_insert_watchpoint (inferior_ptid, addr, len, type)
diff --git a/gdb/frv-tdep.c b/gdb/frv-tdep.c
index 7bc09f0..30e1928 100644
--- a/gdb/frv-tdep.c
+++ b/gdb/frv-tdep.c
@@ -1293,8 +1293,8 @@ frv_check_watch_resources (int type, int cnt, int ot)
 }
 
 
-CORE_ADDR
-frv_stopped_data_address (void)
+int
+frv_stopped_data_address (CORE_ADDR *addr_p)
 {
   CORE_ADDR brr, dbar0, dbar1, dbar2, dbar3;
 
@@ -1305,15 +1305,24 @@ frv_stopped_data_address (void)
   dbar3 = read_register (dbar3_regnum);
 
   if (brr & (1<<11))
-    return dbar0;
+    *addr_p = dbar0;
   else if (brr & (1<<10))
-    return dbar1;
+    *addr_p = dbar1;
   else if (brr & (1<<9))
-    return dbar2;
+    *addr_p = dbar2;
   else if (brr & (1<<8))
-    return dbar3;
+    *addr_p = dbar3;
   else
     return 0;
+
+  return 1;
+}
+
+int
+frv_have_stopped_data_address (void)
+{
+  CORE_ADDR addr = 0;
+  return frv_stopped_data_address (&addr);
 }
 
 static CORE_ADDR
diff --git a/gdb/i386-nat.c b/gdb/i386-nat.c
index 95b4609..6b5f49b 100644
--- a/gdb/i386-nat.c
+++ b/gdb/i386-nat.c
@@ -564,14 +564,16 @@ i386_region_ok_for_watchpoint (CORE_ADDR addr, int len)
   return nregs <= DR_NADDR ? 1 : 0;
 }
 
-/* If the inferior has some watchpoint that triggered, return the
-   address associated with that watchpoint.  Otherwise, return zero.  */
+/* If the inferior has some watchpoint that triggered, set the
+   address associated with that watchpoint and return non-zero.  
+   Otherwise, return zero.  */
 
-CORE_ADDR
-i386_stopped_data_address (void)
+int
+i386_stopped_data_address (CORE_ADDR *addr_p)
 {
   CORE_ADDR addr = 0;
   int i;
+  int rc = 0;
 
   dr_status_mirror = I386_DR_LOW_GET_STATUS ();
 
@@ -586,6 +588,7 @@ i386_stopped_data_address (void)
 	  && I386_DR_GET_RW_LEN (i) != 0)
 	{
 	  addr = dr_mirror[i];
+	  rc = 1;
 	  if (maint_show_dr)
 	    i386_show_dr ("watchpoint_hit", addr, -1, hw_write);
 	}
@@ -593,7 +596,16 @@ i386_stopped_data_address (void)
   if (maint_show_dr && addr == 0)
     i386_show_dr ("stopped_data_addr", 0, 0, hw_write);
 
-  return addr;
+  if (rc)
+    *addr_p = addr;
+  return rc;
+}
+
+int
+i386_stopped_by_watchpoint (void)
+{
+  CORE_ADDR addr = 0;
+  return i386_stopped_data_address (&addr);
 }
 
 /* Return non-zero if the inferior has some break/watchpoint that
diff --git a/gdb/ia64-linux-nat.c b/gdb/ia64-linux-nat.c
index 09daf24..3a61730 100644
--- a/gdb/ia64-linux-nat.c
+++ b/gdb/ia64-linux-nat.c
@@ -636,12 +636,13 @@ ia64_linux_remove_watchpoint (ptid_t ptid, CORE_ADDR addr, int len)
   return -1;
 }
 
-CORE_ADDR
-ia64_linux_stopped_by_watchpoint (ptid_t ptid)
+int
+ia64_linux_stopped_data_address (CORE_ADDR *addr_p)
 {
   CORE_ADDR psr;
   int tid;
   struct siginfo siginfo;
+  ptid_t ptid = inferior_ptid;
 
   tid = TIDGET(ptid);
   if (tid == 0)
@@ -659,7 +660,15 @@ ia64_linux_stopped_by_watchpoint (ptid_t ptid)
                            for the next instruction */
   write_register_pid (IA64_PSR_REGNUM, psr, ptid);
 
-  return (CORE_ADDR) siginfo.si_addr;
+  *addr_p = (CORE_ADDR)siginfo.si_addr;
+  return 1;
+}
+
+int
+ia64_linux_stopped_by_watchpoint (void)
+{
+  CORE_ADDR addr;
+  return ia64_linux_stopped_data_address (&addr);
 }
 
 LONGEST 
diff --git a/gdb/remote-m32r-sdi.c b/gdb/remote-m32r-sdi.c
index a2fc046..f65f5ae 100644
--- a/gdb/remote-m32r-sdi.c
+++ b/gdb/remote-m32r-sdi.c
@@ -1450,16 +1450,23 @@ m32r_remove_watchpoint (CORE_ADDR addr, int len, int type)
   return 0;
 }
 
-CORE_ADDR
-m32r_stopped_data_address (void)
+int
+m32r_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
 {
-  return hit_watchpoint_addr;
+  int rc = 0;
+  if (hit_watchpoint_addr != 0x00000000)
+    {
+      *addr_p = hit_watchpoint_addr;
+      rc = 1;
+    }
+  return rc;
 }
 
 int
 m32r_stopped_by_watchpoint (void)
 {
-  return (hit_watchpoint_addr != 0x00000000);
+  CORE_ADDR addr;
+  return m32r_stopped_data_address (&current_target, &addr);
 }
 
 
diff --git a/gdb/remote.c b/gdb/remote.c
index 7cbbbd8..2d57686 100644
--- a/gdb/remote.c
+++ b/gdb/remote.c
@@ -4624,13 +4624,18 @@ remote_stopped_by_watchpoint (void)
 
 extern int stepped_after_stopped_by_watchpoint;
 
-static CORE_ADDR
-remote_stopped_data_address (void)
+static int
+remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
 {
+  int rc = 0;
   if (remote_stopped_by_watchpoint ()
       || stepped_after_stopped_by_watchpoint)
-    return remote_watch_data_address;
-  return (CORE_ADDR)0;
+    {
+      *addr_p = remote_watch_data_address;
+      rc = 1;
+    }
+
+  return rc;
 }
 
 
diff --git a/gdb/target.c b/gdb/target.c
index 7176dbe..ce51f3d 100644
--- a/gdb/target.c
+++ b/gdb/target.c
@@ -127,7 +127,7 @@ static int debug_to_remove_watchpoint (CORE_ADDR, int, int);
 
 static int debug_to_stopped_by_watchpoint (void);
 
-static CORE_ADDR debug_to_stopped_data_address (void);
+static int debug_to_stopped_data_address (struct target_ops *, CORE_ADDR *);
 
 static int debug_to_region_size_ok_for_hw_watchpoint (int);
 
@@ -524,7 +524,7 @@ update_current_target (void)
 	    (int (*) (void))
 	    return_zero);
   de_fault (to_stopped_data_address,
-	    (CORE_ADDR (*) (void))
+	    (int (*) (struct target_ops *, CORE_ADDR *))
 	    return_zero);
   de_fault (to_region_size_ok_for_hw_watchpoint,
 	    default_region_size_ok_for_hw_watchpoint);
@@ -1011,6 +1011,19 @@ target_write_memory (CORE_ADDR memaddr, char *myaddr, int len)
     return target_xfer_memory (memaddr, myaddr, len, 1);
 }
 
+#ifndef target_stopped_data_address_p
+int
+target_stopped_data_address_p (struct target_ops *target)
+{
+  if (target->to_stopped_data_address == return_zero
+      || (target->to_stopped_data_address == debug_to_stopped_data_address
+	  && debug_target.to_stopped_data_address == return_zero))
+    return 0;
+  else
+    return 1;
+}
+#endif
+
 static int trust_readonly = 0;
 
 /* Move memory to or from the targets.  The top target gets priority;
@@ -2069,16 +2082,17 @@ debug_to_stopped_by_watchpoint (void)
   return retval;
 }
 
-static CORE_ADDR
-debug_to_stopped_data_address (void)
+static int
+debug_to_stopped_data_address (struct target_ops *target, CORE_ADDR *addr)
 {
-  CORE_ADDR retval;
+  int retval;
 
-  retval = debug_target.to_stopped_data_address ();
+  retval = debug_target.to_stopped_data_address (target, addr);
 
   fprintf_unfiltered (gdb_stdlog,
-		      "target_stopped_data_address () = 0x%lx\n",
-		      (unsigned long) retval);
+		      "target_stopped_data_address ([0x%lx]) = %ld\n",
+		      (unsigned long)*addr,
+		      (unsigned long)retval);
   return retval;
 }
 
diff --git a/gdb/target.h b/gdb/target.h
index 428e8b3..9a4f76a 100644
--- a/gdb/target.h
+++ b/gdb/target.h
@@ -341,7 +341,7 @@ struct target_ops
     int (*to_insert_watchpoint) (CORE_ADDR, int, int);
     int (*to_stopped_by_watchpoint) (void);
     int to_have_continuable_watchpoint;
-    CORE_ADDR (*to_stopped_data_address) (void);
+    int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
     int (*to_region_size_ok_for_hw_watchpoint) (int);
     void (*to_terminal_init) (void);
     void (*to_terminal_inferior) (void);
@@ -1067,9 +1067,14 @@ extern void (*deprecated_target_new_objfile_hook) (struct objfile *);
      (*current_target.to_remove_hw_breakpoint) (addr, save)
 #endif
 
+extern int target_stopped_data_address_p (struct target_ops *);
+
 #ifndef target_stopped_data_address
-#define target_stopped_data_address() \
-    (*current_target.to_stopped_data_address) ()
+#define target_stopped_data_address(target, x) \
+    (*target.to_stopped_data_address) (target, x)
+#else
+/* Horrible hack to get around existing macros :-(.  */
+#define target_stopped_data_address_p(CURRENT_TARGET) (1)
 #endif
 
 /* This will only be defined by a target that supports catching vfork events,