1/* Internal interfaces for the GNU/Linux specific target code for gdbserver.
2   Copyright 2002, 2004 Free Software Foundation, Inc.
3
4   This file is part of GDB.
5
6   This program is free software; you can redistribute it and/or modify
7   it under the terms of the GNU General Public License as published by
8   the Free Software Foundation; either version 2 of the License, or
9   (at your option) any later version.
10
11   This program is distributed in the hope that it will be useful,
12   but WITHOUT ANY WARRANTY; without even the implied warranty of
13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14   GNU 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/*
22 * $FreeBSD$
23 */
24
25typedef void (*regset_fill_func) (void *);
26typedef void (*regset_store_func) (const void *);
27enum regset_type {
28  GENERAL_REGS,
29  FP_REGS,
30  EXTENDED_REGS,
31};
32
33struct regset_info
34{
35  int get_request, set_request;
36  int size;
37  enum regset_type type;
38  regset_fill_func fill_function;
39  regset_store_func store_function;
40};
41extern struct regset_info target_regsets[];
42
43struct fbsd_target_ops
44{
45  int num_regs;
46  int *regmap;
47  int (*cannot_fetch_register) (int);
48
49  /* Returns 0 if we can store the register, 1 if we can not
50     store the register, and 2 if failure to store the register
51     is acceptable.  */
52  int (*cannot_store_register) (int);
53  CORE_ADDR (*get_pc) (void);
54  void (*set_pc) (CORE_ADDR newpc);
55  const char *breakpoint;
56  int breakpoint_len;
57  CORE_ADDR (*breakpoint_reinsert_addr) (void);
58
59
60  int decr_pc_after_break;
61  int (*breakpoint_at) (CORE_ADDR pc);
62};
63
64extern struct fbsd_target_ops the_low_target;
65
66#define get_process(inf) ((struct process_info *)(inf))
67#define get_thread_process(thr) (get_process (inferior_target_data (thr)))
68#define get_process_thread(proc) ((struct thread_info *) \
69				  find_inferior_id (&all_threads, \
70				  get_process (proc)->tid))
71
72struct process_info
73{
74  struct inferior_list_entry head;
75  int thread_known;
76  int lwpid;
77  int tid;
78
79  /* If this flag is set, the next SIGSTOP will be ignored (the process will
80     be immediately resumed).  */
81  int stop_expected;
82
83  /* If this flag is set, the process is known to be stopped right now (stop
84     event already received in a wait()).  */
85  int stopped;
86
87  /* If this flag is set, we have sent a SIGSTOP to this process and are
88     waiting for it to stop.  */
89  int sigstop_sent;
90
91  /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet
92     been reported.  */
93  int status_pending_p;
94  int status_pending;
95
96  /* If this flag is set, the pending status is a (GDB-placed) breakpoint.  */
97  int pending_is_breakpoint;
98  CORE_ADDR pending_stop_pc;
99
100  /* If this is non-zero, it is a breakpoint to be reinserted at our next
101     stop (SIGTRAP stops only).  */
102  CORE_ADDR bp_reinsert;
103
104  /* If this flag is set, the last continue operation on this process
105     was a single-step.  */
106  int stepping;
107
108  /* If this is non-zero, it points to a chain of signals which need to
109     be delivered to this process.  */
110  struct pending_signals *pending_signals;
111
112  /* A link used when resuming.  It is initialized from the resume request,
113     and then processed and cleared in fbsd_resume_one_process.  */
114
115  struct thread_resume *resume;
116};
117
118extern struct inferior_list all_processes;
119
120void fbsd_attach_lwp (int pid, int tid);
121
122int thread_db_init (void);
123