1 /* Internal interfaces for the GNU/Linux specific target code for gdbserver.
2 Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010, 2011
3 Free Software Foundation, Inc.
5 This file is part of GDB.
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
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.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 #ifdef HAVE_THREAD_DB_H
21 #include <thread_db.h>
24 #include "gdb_proc_service.h"
26 #ifdef HAVE_LINUX_REGSETS
27 typedef void (*regset_fill_func
) (struct regcache
*, void *);
28 typedef void (*regset_store_func
) (struct regcache
*, const void *);
37 int get_request
, set_request
;
38 /* If NT_TYPE isn't 0, it will be passed to ptrace as the 3rd
39 argument and the 4th argument should be "const struct iovec *". */
42 enum regset_type type
;
43 regset_fill_func fill_function
;
44 regset_store_func store_function
;
46 extern struct regset_info target_regsets
[];
51 struct process_info_private
53 /* Arch-specific additions. */
54 struct arch_process_info
*arch_private
;
56 /* libthread_db-specific additions. Not NULL if this process has loaded
57 thread_db, and it is active. */
58 struct thread_db
*thread_db
;
60 /* &_r_debug. 0 if not yet determined. -1 if no PT_DYNAMIC in Phdrs. */
66 struct linux_target_ops
68 /* Architecture-specific setup. */
69 void (*arch_setup
) (void);
73 int (*cannot_fetch_register
) (int);
75 /* Returns 0 if we can store the register, 1 if we can not
76 store the register, and 2 if failure to store the register
78 int (*cannot_store_register
) (int);
79 CORE_ADDR (*get_pc
) (struct regcache
*regcache
);
80 void (*set_pc
) (struct regcache
*regcache
, CORE_ADDR newpc
);
81 const unsigned char *breakpoint
;
83 CORE_ADDR (*breakpoint_reinsert_addr
) (void);
85 int decr_pc_after_break
;
86 int (*breakpoint_at
) (CORE_ADDR pc
);
88 /* Breakpoint and watchpoint related functions. See target.h for
90 int (*insert_point
) (char type
, CORE_ADDR addr
, int len
);
91 int (*remove_point
) (char type
, CORE_ADDR addr
, int len
);
92 int (*stopped_by_watchpoint
) (void);
93 CORE_ADDR (*stopped_data_address
) (void);
95 /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular
96 for registers smaller than an xfer unit). */
97 void (*collect_ptrace_register
) (struct regcache
*regcache
,
98 int regno
, char *buf
);
99 void (*supply_ptrace_register
) (struct regcache
*regcache
,
100 int regno
, const char *buf
);
102 /* Hook to convert from target format to ptrace format and back.
103 Returns true if any conversion was done; false otherwise.
104 If DIRECTION is 1, then copy from INF to NATIVE.
105 If DIRECTION is 0, copy from NATIVE to INF. */
106 int (*siginfo_fixup
) (struct siginfo
*native
, void *inf
, int direction
);
108 /* Hook to call when a new process is created or attached to.
109 If extra per-process architecture-specific data is needed,
111 struct arch_process_info
* (*new_process
) (void);
113 /* Hook to call when a new thread is detected.
114 If extra per-thread architecture-specific data is needed,
116 struct arch_lwp_info
* (*new_thread
) (void);
118 /* Hook to call prior to resuming a thread. */
119 void (*prepare_to_resume
) (struct lwp_info
*);
121 /* Hook to support target specific qSupported. */
122 void (*process_qsupported
) (const char *);
124 /* Returns true if the low target supports tracepoints. */
125 int (*supports_tracepoints
) (void);
127 /* Fill ADDRP with the thread area address of LWPID. Returns 0 on
128 success, -1 on failure. */
129 int (*get_thread_area
) (int lwpid
, CORE_ADDR
*addrp
);
131 /* Install a fast tracepoint jump pad. See target.h for
133 int (*install_fast_tracepoint_jump_pad
) (CORE_ADDR tpoint
, CORE_ADDR tpaddr
,
137 CORE_ADDR
*jump_entry
,
138 CORE_ADDR
*trampoline
,
139 ULONGEST
*trampoline_size
,
140 unsigned char *jjump_pad_insn
,
141 ULONGEST
*jjump_pad_insn_size
,
142 CORE_ADDR
*adjusted_insn_addr
,
143 CORE_ADDR
*adjusted_insn_addr_end
,
146 /* Return the bytecode operations vector for the current inferior.
147 Returns NULL if bytecode compilation is not supported. */
148 struct emit_ops
*(*emit_ops
) (void);
150 /* Return the minimum length of an instruction that can be safely overwritten
151 for use as a fast tracepoint. */
152 int (*get_min_fast_tracepoint_insn_len
) (void);
156 extern struct linux_target_ops the_low_target
;
158 #define ptid_of(proc) ((proc)->head.id)
159 #define pid_of(proc) ptid_get_pid ((proc)->head.id)
160 #define lwpid_of(proc) ptid_get_lwp ((proc)->head.id)
162 #define get_lwp(inf) ((struct lwp_info *)(inf))
163 #define get_thread_lwp(thr) (get_lwp (inferior_target_data (thr)))
164 #define get_lwp_thread(proc) ((struct thread_info *) \
165 find_inferior_id (&all_threads, \
166 get_lwp (proc)->head.id))
170 struct inferior_list_entry head
;
172 /* If this flag is set, the next SIGSTOP will be ignored (the
173 process will be immediately resumed). This means that either we
174 sent the SIGSTOP to it ourselves and got some other pending event
175 (so the SIGSTOP is still pending), or that we stopped the
176 inferior implicitly via PTRACE_ATTACH and have not waited for it
180 /* When this is true, we shall not try to resume this thread, even
181 if last_resume_kind isn't resume_stop. */
184 /* If this flag is set, the lwp is known to be stopped right now (stop
185 event already received in a wait()). */
188 /* If this flag is set, the lwp is known to be dead already (exit
189 event already received in a wait(), and is cached in
193 /* When stopped is set, the last wait status recorded for this lwp. */
196 /* When stopped is set, this is where the lwp stopped, with
197 decr_pc_after_break already accounted for. */
200 /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet
202 int status_pending_p
;
205 /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
207 int stopped_by_watchpoint
;
209 /* On architectures where it is possible to know the data address of
210 a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and
211 contains such data address. Only valid if STOPPED_BY_WATCHPOINT
213 CORE_ADDR stopped_data_address
;
215 /* If this is non-zero, it is a breakpoint to be reinserted at our next
216 stop (SIGTRAP stops only). */
217 CORE_ADDR bp_reinsert
;
219 /* If this flag is set, the last continue operation at the ptrace
220 level on this process was a single-step. */
223 /* If this flag is set, we need to set the event request flags the
224 next time we see this LWP stop. */
225 int must_set_ptrace_flags
;
227 /* If this is non-zero, it points to a chain of signals which need to
228 be delivered to this process. */
229 struct pending_signals
*pending_signals
;
231 /* A link used when resuming. It is initialized from the resume request,
232 and then processed and cleared in linux_resume_one_lwp. */
233 struct thread_resume
*resume
;
235 /* True if it is known that this lwp is presently collecting a fast
236 tracepoint (it is in the jump pad or in some code that will
237 return to the jump pad. Normally, we won't care about this, but
238 we will if a signal arrives to this lwp while it is
240 int collecting_fast_tracepoint
;
242 /* If this is non-zero, it points to a chain of signals which need
243 to be reported to GDB. These were deferred because the thread
244 was doing a fast tracepoint collect when they arrived. */
245 struct pending_signals
*pending_signals_to_report
;
247 /* When collecting_fast_tracepoint is first found to be 1, we insert
248 a exit-jump-pad-quickly breakpoint. This is it. */
249 struct breakpoint
*exit_jump_pad_bkpt
;
251 /* True if the LWP was seen stop at an internal breakpoint and needs
252 stepping over later when it is resumed. */
256 #ifdef HAVE_THREAD_DB_H
257 /* The thread handle, used for e.g. TLS access. Only valid if
258 THREAD_KNOWN is set. */
262 /* Arch-specific additions. */
263 struct arch_lwp_info
*arch_private
;
266 extern struct inferior_list all_lwps
;
268 char *linux_child_pid_to_exec_file (int pid
);
269 int elf_64_file_p (const char *file
);
271 void linux_attach_lwp (unsigned long pid
);
272 struct lwp_info
*find_lwp_pid (ptid_t ptid
);
273 void linux_stop_lwp (struct lwp_info
*lwp
);
275 /* From thread-db.c */
276 int thread_db_init (int use_events
);
277 void thread_db_detach (struct process_info
*);
278 void thread_db_mourn (struct process_info
*);
279 int thread_db_handle_monitor_command (char *);
280 int thread_db_get_tls_address (struct thread_info
*thread
, CORE_ADDR offset
,
281 CORE_ADDR load_module
, CORE_ADDR
*address
);
282 int thread_db_look_up_one_symbol (const char *name
, CORE_ADDR
*addrp
);