gdb/

* breakpoint.c (deprecated_read_memory_nobpt): Update to use
	shadow_len.
	(insert_bp_location, reattach_breakpoints, remove_breakpoint)
	(delete_breakpoint): Update calls to changed methods.
	(deprecated_insert_raw_breakpoint, deprecated_remove_raw_breakpoint)
	(single_step_breakpoints, insert_single_step_breakpoint)
	(remove_single_step_breakpoints): New.
	* breakpoint.h (struct bp_target_info): New.
	(struct bp_location): Replace shadow_contents with
	target_info and overlay_target_info.
	(deprecated_insert_raw_breakpoint, deprecated_remove_raw_breakpoint)
	(insert_single_step_breakpoint, remove_single_step_breakpoints): New
	prototypes.
	* gdbarch.sh: Forward declare struct bp_target_info in gdbarch.h.
	(memory_insert_breakpoint, memory_remove_breakpoint): Update second
	argument.
	* mem-break.c (default_memory_insert_breakpoint): Update.  Set
	placed_address, placed_size, and shadow_len.
	(default_memory_remove_breakpoint): Update.  Don't use
	BREAKPOINT_FROM_PC.
	(memory_insert_breakpoint, memory_remove_breakpoint): Update.
	* target.c (update_current_target): Update prototypes for changed
	functions.
	(debug_to_insert_breakpoint, debug_to_remove_breakpoint)
	(debug_to_insert_hw_breakpoint, debug_to_remove_hw_breakpoint):
	Update.
	* target.h: Forward declare struct bp_target_info.
	(struct target_ops): Use a bp_target_info argument for
	to_insert_breakpoint, to_remove_breakpoint,
	to_insert_hw_breakpoint, and to_remove_hw_breakpoint.
	(target_insert_breakpoint, target_remove_breakpoint)
	(target_insert_hw_breakpoint, target_remove_hw_breakpoint)
	(memory_insert_breakpoint, memory_remove_breakpoint)
	(default_memory_insert_breakpoint, default_memory_remove_breakpoint):
	Update.
	* config/i386/nm-i386.h: Forward declare struct bp_target_info.
	(i386_insert_hw_breakpoint, i386_remove_hw_breakpoint): Update.
	(target_insert_hw_breakpoint, target_remove_hw_breakpoint): Likewise.

	* gdbarch.c, gdbarch.h: Regenerated.

	* alpha-tdep.c (alpha_software_single_step): Use
	insert_single_step_breakpoint and remove_single_step_breakpoints.
	Remove unused statics.
	* arm-tdep.c (arm_software_single_step): Likewise.  Add a note.
	* cris-tdep.c (cris_software_single_step): Likewise.
	* mips-tdep.c (mips_software_single_step): Likewise.
	* rs6000-tdep.c (rs6000_software_single_step): Likewise.
	* sparc-tdep.c (sparc_software_single_step): Likewise.
	* wince.c (struct thread_info_struct): Remove step_prev.
	(undoSStep): Use remove_single_step_breakpoints.
	(wince_software_single_step): Use insert_single_step_breakpoint.

	* corelow.c (ignore): Remove unneeded prototype.  Update arguments.
	* exec.c (ignore): Likewise.
	* sol-thread.c (ignore): Likewise.

	* procfs.c (dbx_link_shadow_contents): Delete.
	(dbx_link_bpt): New.
	(procfs_mourn_inferior): Remove it if necessary.
	(remove_dbx_link_breakpoint): Use it.
	(insert_dbx_link_bpt_in_file): Set it.
	(procfs_init_inferior): Don't update dbx_link_bpt_addr.
	* rs6000-nat.c (exec_one_dummy_insn): Use
	deprecated_insert_raw_breakpoint and
	deprecated_remove_raw_breakpoint.
	* solib-irix.c (shadow_contents, breakpoint_addr): Delete.
	(base_breakpoint): New.
	(disable_break): Use it.
	(enable_break): Set it.

	* i386-nat.c (i386_insert_hw_breakpoint, i386_remove_hw_breakpoint):
	Update.
	* ia64-tdep.c (ia64_memory_insert_breakpoint)
	(ia64_memory_remove_breakpoint): Likewise.
	* m32r-tdep.c (m32r_memory_insert_breakpoint)
	(m32r_memory_remove_breakpoint): Likewise.
	* monitor.c (monitor_insert_breakpoint, monitor_remove_breakpoint):
	Likewise.  Remove unnecessary prototypes.  Use placed_address
	and placed_size.  Removed useless read from memory.
	* nto-procfs.c (procfs_insert_breakpoint)
	(procfs_remove_breakpoint, procfs_insert_hw_breakpoint)
	(procfs_remove_hw_breakpoint): Update.
	* ocd.c (ocd_insert_breakpoint, ocd_remove_breakpoint): Likewise.
	* ocd.h (ocd_insert_breakpoint, ocd_remove_breakpoint): Likewise.
	* ppc-linux-tdep.c (ppc_linux_memory_remove_breakpoint): Likewise.
	* ppc-tdep.h (ppc_linux_memory_remove_breakpoint): Likewise.
	* remote-e7000.c (e7000_insert_breakpoint)
	(e7000_remove_breakpoint): Likewise.
	* remote-m32r-sdi.c (m32r_insert_breakpoint)
	(m32r_remove_breakpoint): Likewise.
	* remote-mips.c (mips_insert_breakpoint)
	(mips_remove_breakpoint): Likewise.
	* remote-rdp.c (remote_rdp_insert_breakpoint)
	(remote_rdp_remove_breakpoint): Likewise.
	(rdp_step): Use deprecated_insert_raw_breakpoint and
	deprecated_remove_raw_breakpoint.
	* remote-sds.c (sds_insert_breakpoint, sds_remove_breakpoint):
	Update.
	* remote-sim.c (gdbsim_insert_breakpoint, gdbsim_remove_breakpoint):
	Delete.
	(init_gdbsim_ops): Use memory_insert_breakpoint and
	memory_remove_breakpoint.
	* remote-st.c (st2000_insert_breakpoint)
	(st2000_remove_breakpoint): Update.  Remove unused
	BREAKPOINT_FROM_PC.
	* remote.c (remote_insert_breakpoint, remote_remove_breakpoint):
	Update.  Use placed_address and placed_size.
	(remote_insert_hw_breakpoint, remote_remove_hw_breakpoint): Likewise.
gdb/doc/
	* gdbint.texinfo (x86 Watchpoints, Target Conditionals): Update insert
	and remove breakpoint prototypes.
	(Watchpoints): Move description of target_insert_hw_breakpoint and
	target_remove_hw_breakpoint ...
	(Breakpoints): ... to here.  Document target_insert_breakpoint and
	target_remove_breakpoint.

gdb/remote.c

@@ -136,10 +136,6 @@ static void skip_frame (void);
 
 static long read_frame (char **buf_p, long *sizeof_buf);
 
-static int remote_insert_breakpoint (CORE_ADDR, bfd_byte *);
-
-static int remote_remove_breakpoint (CORE_ADDR, bfd_byte *);
-
 static int hexnumlen (ULONGEST num);
 
 static void init_remote_ops (void);
@@ -4356,22 +4352,18 @@ static unsigned char little_break_insn[] = DEPRECATED_LITTLE_REMOTE_BREAKPOINT;
 
 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
 
-/* Insert a breakpoint on targets that don't have any better
-   breakpoint support.  We read the contents of the target location
-   and stash it, then overwrite it with a breakpoint instruction.
-   ADDR is the target location in the target machine.  CONTENTS_CACHE
-   is a pointer to memory allocated for saving the target contents.
-   It is guaranteed by the caller to be long enough to save the number
-   of bytes returned by BREAKPOINT_FROM_PC.  */
+/* Insert a breakpoint.  On targets that have software breakpoint
+   support, we ask the remote target to do the work; on targets
+   which don't, we insert a traditional memory breakpoint.  */
 
 static int
-remote_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
+remote_insert_breakpoint (struct bp_target_info *bp_tgt)
 {
+  CORE_ADDR addr = bp_tgt->placed_address;
   struct remote_state *rs = get_remote_state ();
 #ifdef DEPRECATED_REMOTE_BREAKPOINT
   int val;
 #endif
-  int bp_size;
 
   /* Try the "Z" s/w breakpoint packet if it is not already disabled.
      If it succeeds, then set the support to PACKET_ENABLE.  If it
@@ -4382,13 +4374,13 @@ remote_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
     {
       char *p = rs->buf;
 
-      addr = remote_address_masked (addr);
       *(p++) = 'Z';
       *(p++) = '0';
       *(p++) = ',';
-      p += hexnumstr (p, (ULONGEST) addr);
-      BREAKPOINT_FROM_PC (&addr, &bp_size);
-      sprintf (p, ",%d", bp_size);
+      BREAKPOINT_FROM_PC (&bp_tgt->placed_address, &bp_tgt->placed_size);
+      addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
+      p += hexnumstr (p, addr);
+      sprintf (p, ",%d", bp_tgt->placed_size);
 
       putpkt (rs->buf);
       getpkt (&rs->buf, &rs->buf_size, 0);
@@ -4405,7 +4397,8 @@ remote_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
     }
 
 #ifdef DEPRECATED_REMOTE_BREAKPOINT
-  val = target_read_memory (addr, contents_cache, sizeof big_break_insn);
+  bp_tgt->placed_size = bp_tgt->shadow_len = sizeof big_break_insn;
+  val = target_read_memory (addr, bp_tgt->shadow_contents, bp_tgt->shadow_len);
 
   if (val == 0)
     {
@@ -4419,13 +4412,14 @@ remote_insert_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
 
   return val;
 #else
-  return memory_insert_breakpoint (addr, contents_cache);
+  return memory_insert_breakpoint (bp_tgt);
 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
 }
 
 static int
-remote_remove_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
+remote_remove_breakpoint (struct bp_target_info *bp_tgt)
 {
+  CORE_ADDR addr = bp_tgt->placed_address;
   struct remote_state *rs = get_remote_state ();
   int bp_size;
 
@@ -4437,10 +4431,9 @@ remote_remove_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
       *(p++) = '0';
       *(p++) = ',';
 
-      addr = remote_address_masked (addr);
-      p += hexnumstr (p, (ULONGEST) addr);
-      BREAKPOINT_FROM_PC (&addr, &bp_size);
-      sprintf (p, ",%d", bp_size);
+      addr = (ULONGEST) remote_address_masked (bp_tgt->placed_address);
+      p += hexnumstr (p, addr);
+      sprintf (p, ",%d", bp_tgt->placed_size);
 
       putpkt (rs->buf);
       getpkt (&rs->buf, &rs->buf_size, 0);
@@ -4449,9 +4442,10 @@ remote_remove_breakpoint (CORE_ADDR addr, bfd_byte *contents_cache)
     }
 
 #ifdef DEPRECATED_REMOTE_BREAKPOINT
-  return target_write_memory (addr, contents_cache, sizeof big_break_insn);
+  return target_write_memory (bp_tgt->placed_address, bp_tgt->shadow_contents,
+			      bp_tgt->shadow_len);
 #else
-  return memory_remove_breakpoint (addr, contents_cache);
+  return memory_remove_breakpoint (bp_tgt);
 #endif /* DEPRECATED_REMOTE_BREAKPOINT */
 }
 
@@ -4595,16 +4589,16 @@ remote_stopped_data_address (struct target_ops *target, CORE_ADDR *addr_p)
 
 
 static int
-remote_insert_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
+remote_insert_hw_breakpoint (struct bp_target_info *bp_tgt)
 {
-  int len = 0;
+  CORE_ADDR addr;
   struct remote_state *rs = get_remote_state ();
   char *p = rs->buf;
 
   /* The length field should be set to the size of a breakpoint
-     instruction.  */
+     instruction, even though we aren't inserting one ourselves.  */
 
-  BREAKPOINT_FROM_PC (&addr, &len);
+  BREAKPOINT_FROM_PC (&bp_tgt->placed_address, &bp_tgt->placed_size);
 
   if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
     error (_("Can't set hardware breakpoint without the '%s' (%s) packet."),
@@ -4615,9 +4609,9 @@ remote_insert_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
   *(p++) = '1';
   *(p++) = ',';
 
-  addr = remote_address_masked (addr);
+  addr = remote_address_masked (bp_tgt->placed_address);
   p += hexnumstr (p, (ULONGEST) addr);
-  sprintf (p, ",%x", len);
+  sprintf (p, ",%x", bp_tgt->placed_size);
 
   putpkt (rs->buf);
   getpkt (&rs->buf, &rs->buf_size, 0);
@@ -4636,17 +4630,12 @@ remote_insert_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
 
 
 static int
-remote_remove_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
+remote_remove_hw_breakpoint (struct bp_target_info *bp_tgt)
 {
-  int len;
+  CORE_ADDR addr;
   struct remote_state *rs = get_remote_state ();
   char *p = rs->buf;
 
-  /* The length field should be set to the size of a breakpoint
-     instruction.  */
-
-  BREAKPOINT_FROM_PC (&addr, &len);
-
   if (remote_protocol_packets[PACKET_Z1].support == PACKET_DISABLE)
     error (_("Can't clear hardware breakpoint without the '%s' (%s) packet."),
 	   remote_protocol_packets[PACKET_Z1].name,
@@ -4656,9 +4645,9 @@ remote_remove_hw_breakpoint (CORE_ADDR addr, gdb_byte *shadow)
   *(p++) = '1';
   *(p++) = ',';
 
-  addr = remote_address_masked (addr);
+  addr = remote_address_masked (bp_tgt->placed_address);
   p += hexnumstr (p, (ULONGEST) addr);
-  sprintf (p, ",%x", len);
+  sprintf (p, ",%x", bp_tgt->placed_size);
 
   putpkt (rs->buf);
   getpkt (&rs->buf, &rs->buf_size, 0);