1/* Common things used by the various *gnu-nat.c files
2   Copyright 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc.
3
4   Written by Miles Bader <miles@gnu.ai.mit.edu>
5
6   The GNU Hurd is free software; you can redistribute it and/or
7   modify it under the terms of the GNU General Public License as
8   published by the Free Software Foundation; either version 2, or (at
9   your option) any later version.
10
11   The GNU Hurd is distributed in the hope that it will be useful, but
12   WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
14   General Public License for more details.
15
16   You should have received a copy of the GNU General Public License
17   along with this program; if not, write to the Free Software
18   Foundation, Inc., 59 Temple Place - Suite 330,
19   Boston, MA 02111-1307, USA.  */
20
21#ifndef __GNU_NAT_H__
22#define __GNU_NAT_H__
23
24#include <unistd.h>
25#include <mach.h>
26
27struct inf;
28
29extern struct inf *current_inferior;
30
31/* Converts a GDB pid to a struct proc.  */
32struct proc *inf_tid_to_thread (struct inf *inf, int tid);
33
34/* Makes sure that INF's thread list is synced with the actual process.  */
35int inf_update_procs (struct inf *inf);
36
37/* A proc is either a thread, or the task (there can only be one task proc
38   because it always has the same TID, PROC_TID_TASK).  */
39struct proc
40  {
41    thread_t port;		/* The task or thread port.  */
42    int tid;			/* The GDB pid (actually a thread id).  */
43    int num;			/* An id number for threads, to print.  */
44
45    mach_port_t saved_exc_port;	/* The task/thread's real exception port.  */
46    mach_port_t exc_port;	/* Our replacement, which for.  */
47
48    int sc;			/* Desired suspend count.   */
49    int cur_sc;			/* Implemented suspend count.  */
50    int run_sc;			/* Default sc when the program is running. */
51    int pause_sc;		/* Default sc when gdb has control. */
52    int resume_sc;		/* Sc resulting from the last resume. */
53    int detach_sc;		/* SC to leave around when detaching
54				   from program. */
55
56    thread_state_data_t state;	/* Registers, &c. */
57    int state_valid:1;		/* True if STATE is up to date. */
58    int state_changed:1;
59
60    int aborted:1;		/* True if thread_abort has been called.  */
61    int dead:1;			/* We happen to know it's actually dead. */
62
63    /* Bit mask of registers fetched by gdb.  This is used when we re-fetch
64       STATE after aborting the thread, to detect that gdb may have out-of-date
65       information.  */
66    unsigned long fetched_regs;
67
68    struct inf *inf;		/* Where we come from.  */
69
70    struct proc *next;
71  };
72
73/* The task has a thread entry with this TID.  */
74#define PROC_TID_TASK 	(-1)
75
76#define proc_is_task(proc) ((proc)->tid == PROC_TID_TASK)
77#define proc_is_thread(proc) ((proc)->tid != PROC_TID_TASK)
78
79extern int __proc_pid (struct proc *proc);
80
81/* Make sure that the state field in PROC is up to date, and return a
82   pointer to it, or 0 if something is wrong.  If WILL_MODIFY is true,
83   makes sure that the thread is stopped and aborted first, and sets
84   the state_changed field in PROC to true.  */
85extern thread_state_t proc_get_state (struct proc *proc, int will_modify);
86
87/* Return printable description of proc.  */
88extern char *proc_string (struct proc *proc);
89
90#define proc_debug(_proc, msg, args...) \
91  do { struct proc *__proc = (_proc); \
92       debug ("{proc %d/%d %p}: " msg, \
93	      __proc_pid (__proc), __proc->tid, __proc , ##args); } while (0)
94
95extern int gnu_debug_flag;
96
97#define debug(msg, args...) \
98 do { if (gnu_debug_flag) \
99        fprintf_unfiltered (gdb_stdlog, "%s:%d: " msg "\r\n", __FILE__ , __LINE__ , ##args); } while (0)
100
101#endif /* __GNU_NAT_H__ */
102