* aarch64-linux-nat.c: Replace PIDGET with ptid_get_pid.
[deliverable/binutils-gdb.git] / gdb / linux-nat.h
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0274a8ce 1/* Native debugging support for GNU/Linux (LWP layer).
10d6c8cd 2
28e7fd62 3 Copyright (C) 2000-2013 Free Software Foundation, Inc.
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4
5 This file is part of GDB.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
a9762ec7 9 the Free Software Foundation; either version 3 of the License, or
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10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
a9762ec7 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
0274a8ce 19
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20#include "target.h"
21
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22#include <signal.h>
23
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24struct arch_lwp_info;
25
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26/* Structure describing an LWP. This is public only for the purposes
27 of ALL_LWPS; target-specific code should generally not access it
28 directly. */
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29
30struct lwp_info
31{
32 /* The process id of the LWP. This is a combination of the LWP id
33 and overall process id. */
34 ptid_t ptid;
35
36 /* Non-zero if this LWP is cloned. In this context "cloned" means
37 that the LWP is reporting to its parent using a signal other than
38 SIGCHLD. */
39 int cloned;
40
41 /* Non-zero if we sent this LWP a SIGSTOP (but the LWP didn't report
42 it back yet). */
43 int signalled;
44
45 /* Non-zero if this LWP is stopped. */
46 int stopped;
47
48 /* Non-zero if this LWP will be/has been resumed. Note that an LWP
49 can be marked both as stopped and resumed at the same time. This
50 happens if we try to resume an LWP that has a wait status
51 pending. We shouldn't let the LWP run until that wait status has
52 been processed, but we should not report that wait status if GDB
53 didn't try to let the LWP run. */
54 int resumed;
55
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56 /* The last resume GDB requested on this thread. */
57 enum resume_kind last_resume_kind;
58
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59 /* If non-zero, a pending wait status. */
60 int status;
61
62 /* Non-zero if we were stepping this LWP. */
63 int step;
64
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65 /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
66 watchpoint trap. */
67 int stopped_by_watchpoint;
68
69 /* On architectures where it is possible to know the data address of
70 a triggered watchpoint, STOPPED_DATA_ADDRESS_P is non-zero, and
71 STOPPED_DATA_ADDRESS contains such data address. Otherwise,
72 STOPPED_DATA_ADDRESS_P is false, and STOPPED_DATA_ADDRESS is
73 undefined. Only valid if STOPPED_BY_WATCHPOINT is true. */
74 int stopped_data_address_p;
75 CORE_ADDR stopped_data_address;
76
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77 /* Non-zero if we expect a duplicated SIGINT. */
78 int ignore_sigint;
79
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80 /* If WAITSTATUS->KIND != TARGET_WAITKIND_SPURIOUS, the waitstatus
81 for this LWP's last event. This may correspond to STATUS above,
82 or to a local variable in lin_lwp_wait. */
83 struct target_waitstatus waitstatus;
84
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85 /* Signal wether we are in a SYSCALL_ENTRY or
86 in a SYSCALL_RETURN event.
87 Values:
88 - TARGET_WAITKIND_SYSCALL_ENTRY
89 - TARGET_WAITKIND_SYSCALL_RETURN */
90 int syscall_state;
91
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92 /* The processor core this LWP was last seen on. */
93 int core;
94
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95 /* Arch-specific additions. */
96 struct arch_lwp_info *arch_private;
97
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98 /* Next LWP in list. */
99 struct lwp_info *next;
100};
101
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102/* The global list of LWPs, for ALL_LWPS. Unlike the threads list,
103 there is always at least one LWP on the list while the GNU/Linux
104 native target is active. */
105extern struct lwp_info *lwp_list;
106
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107/* Iterate over each active thread (light-weight process). */
108#define ALL_LWPS(LP) \
109 for ((LP) = lwp_list; \
9f0bdab8 110 (LP) != NULL; \
4c38200f 111 (LP) = (LP)->next)
9f0bdab8 112
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113/* Attempt to initialize libthread_db. */
114void check_for_thread_db (void);
0274a8ce 115
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116int thread_db_attach_lwp (ptid_t ptid);
117
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118/* Return the set of signals used by the threads library. */
119extern void lin_thread_get_thread_signals (sigset_t *mask);
120
bfb39158 121/* Find process PID's pending signal set from /proc/pid/status. */
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122void linux_proc_pending_signals (int pid, sigset_t *pending,
123 sigset_t *blocked, sigset_t *ignored);
bfb39158 124
93815fbf 125extern int lin_lwp_attach_lwp (ptid_t ptid);
9ee57c33 126
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127extern void linux_stop_lwp (struct lwp_info *lwp);
128
0274a8ce 129/* Iterator function for lin-lwp's lwp list. */
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130struct lwp_info *iterate_over_lwps (ptid_t filter,
131 int (*callback) (struct lwp_info *,
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132 void *),
133 void *data);
10d6c8cd 134
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135/* Create a prototype generic GNU/Linux target. The client can
136 override it with local methods. */
10d6c8cd 137struct target_ops * linux_target (void);
f973ed9c 138
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139/* Create a generic GNU/Linux target using traditional
140 ptrace register access. */
141struct target_ops *
7714d83a 142linux_trad_target (CORE_ADDR (*register_u_offset)(struct gdbarch *, int, int));
910122bf 143
155bd5d1 144/* Register the customized GNU/Linux target. This should be used
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145 instead of calling add_target directly. */
146void linux_nat_add_target (struct target_ops *);
147
9f0bdab8 148/* Register a method to call whenever a new thread is attached. */
7b50312a 149void linux_nat_set_new_thread (struct target_ops *, void (*) (struct lwp_info *));
9f0bdab8 150
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151
152/* Register a method to call whenever a new fork is attached. */
153typedef void (linux_nat_new_fork_ftype) (struct lwp_info *parent,
154 pid_t child_pid);
155void linux_nat_set_new_fork (struct target_ops *ops,
156 linux_nat_new_fork_ftype *fn);
157
158/* Register a method to call whenever a process is killed or
159 detached. */
160typedef void (linux_nat_forget_process_ftype) (pid_t pid);
161void linux_nat_set_forget_process (struct target_ops *ops,
162 linux_nat_forget_process_ftype *fn);
163
164/* Call the method registered with the function above. PID is the
165 process to forget about. */
166void linux_nat_forget_process (pid_t pid);
167
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168/* Register a method that converts a siginfo object between the layout
169 that ptrace returns, and the layout in the architecture of the
170 inferior. */
171void linux_nat_set_siginfo_fixup (struct target_ops *,
a5362b9a 172 int (*) (siginfo_t *,
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173 gdb_byte *,
174 int));
175
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176/* Register a method to call prior to resuming a thread. */
177
178void linux_nat_set_prepare_to_resume (struct target_ops *,
179 void (*) (struct lwp_info *));
180
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181/* Update linux-nat internal state when changing from one fork
182 to another. */
183void linux_nat_switch_fork (ptid_t new_ptid);
9f0bdab8 184
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185/* Store the saved siginfo associated with PTID in *SIGINFO.
186 Return 1 if it was retrieved successfully, 0 otherwise (*SIGINFO is
187 uninitialized in such case). */
188int linux_nat_get_siginfo (ptid_t ptid, siginfo_t *siginfo);
dc146f7c 189
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190/* Set alternative SIGTRAP-like events recognizer. */
191void linux_nat_set_status_is_event (struct target_ops *t,
192 int (*status_is_event) (int status));
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