Merge GDB 7.5.1

gdb/linux-nat.h

 /* Native debugging support for GNU/Linux (LWP layer).
 
    Copyright (C) 2000-2012 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "target.h"
 
 #include <signal.h>
 
+struct arch_lwp_info;
+
 /* Ways to "resume" a thread.  */
 
 enum resume_kind
 {
   /* Thread should continue.  */
   resume_continue,
 
   /* Thread should single-step.  */
   resume_step,
 
@@ skipping 33 matching lines @@
 
   /* The last resume GDB requested on this thread.  */
   enum resume_kind last_resume_kind;
 
   /* If non-zero, a pending wait status.  */
   int status;
 
   /* Non-zero if we were stepping this LWP.  */
   int step;
 
-  /* Non-zero si_signo if this LWP stopped with a trap.  si_addr may
-     be the address of a hardware watchpoint.  */
-  struct siginfo siginfo;
-
   /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
      watchpoint trap.  */
   int stopped_by_watchpoint;
 
   /* On architectures where it is possible to know the data address of
      a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
      STOPPED_DATA_ADDRESS contains such data address.  Otherwise,
      STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
      undefined.  Only valid if STOPPED_BY_WATCHPOINT is true.  */
   int stopped_data_address_p;
@@ skipping 10 matching lines @@
   /* Signal wether we are in a SYSCALL_ENTRY or
      in a SYSCALL_RETURN event.
      Values:
      - TARGET_WAITKIND_SYSCALL_ENTRY
      - TARGET_WAITKIND_SYSCALL_RETURN */
   int syscall_state;
 
   /* The processor core this LWP was last seen on.  */
   int core;
 
+  /* Arch-specific additions.  */
+  struct arch_lwp_info *arch_private;
+
   /* Next LWP in list.  */
   struct lwp_info *next;
 };
 
 /* The global list of LWPs, for ALL_LWPS.  Unlike the threads list,
    there is always at least one LWP on the list while the GNU/Linux
    native target is active.  */
 extern struct lwp_info *lwp_list;
 
 /* Iterate over each active thread (light-weight process).  */
@@ skipping 17 matching lines @@
 
 /* Find process PID's pending signal set from /proc/pid/status.  */
 void linux_proc_pending_signals (int pid, sigset_t *pending,
                                  sigset_t *blocked, sigset_t *ignored);
 
 /* linux-nat functions for handling fork events.  */
 extern void linux_enable_event_reporting (ptid_t ptid);
 
 extern int lin_lwp_attach_lwp (ptid_t ptid);
 
+extern void linux_stop_lwp (struct lwp_info *lwp);
+
 /* Iterator function for lin-lwp's lwp list.  */
 struct lwp_info *iterate_over_lwps (ptid_t filter,
                                     int (*callback) (struct lwp_info *,
                                                      void *), 
                                     void *data);
 
+typedef int (*linux_nat_iterate_watchpoint_lwps_ftype) (struct lwp_info *lwp,
+                                                        void *arg);
+
+extern void linux_nat_iterate_watchpoint_lwps
+  (linux_nat_iterate_watchpoint_lwps_ftype callback, void *callback_data);
+
 /* Create a prototype generic GNU/Linux target.  The client can
    override it with local methods.  */
 struct target_ops * linux_target (void);
 
 /* Create a generic GNU/Linux target using traditional 
    ptrace register access.  */
 struct target_ops *
 linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
 
 /* Register the customized GNU/Linux target.  This should be used
    instead of calling add_target directly.  */
 void linux_nat_add_target (struct target_ops *);
 
 /* Register a method to call whenever a new thread is attached.  */
-void linux_nat_set_new_thread (struct target_ops *, void (*) (ptid_t));
+void linux_nat_set_new_thread (struct target_ops *, void (*) (struct lwp_info *));
 
 /* Register a method that converts a siginfo object between the layout
    that ptrace returns, and the layout in the architecture of the
    inferior.  */
 void linux_nat_set_siginfo_fixup (struct target_ops *,
-                                  int (*) (struct siginfo *,
+                                  int (*) (siginfo_t *,
                                            gdb_byte *,
                                            int));
 
+/* Register a method to call prior to resuming a thread.  */
+
+void linux_nat_set_prepare_to_resume (struct target_ops *,
+                                      void (*) (struct lwp_info *));
+
 /* Update linux-nat internal state when changing from one fork
    to another.  */
 void linux_nat_switch_fork (ptid_t new_ptid);
 
-/* Return the saved siginfo associated with PTID.  */
-struct siginfo *linux_nat_get_siginfo (ptid_t ptid);
-
-/* Compute and return the processor core of a given thread.  */
-int linux_nat_core_of_thread_1 (ptid_t ptid);
+/* Store the saved siginfo associated with PTID in *SIGINFO.
+   Return 1 if it was retrieved successfully, 0 otherwise (*SIGINFO is
+   uninitialized in such case).  */
+int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
 
 /* Set alternative SIGTRAP-like events recognizer.  */
 void linux_nat_set_status_is_event (struct target_ops *t,
                                     int (*status_is_event) (int status));