1 /* Internal interfaces for the GNU/Linux specific target code for gdbserver.
2 Copyright (C) 2002, 2004-2005, 2007-2012 Free Software Foundation,
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>
25 #include "gdb_proc_service.h"
27 #ifdef HAVE_LINUX_REGSETS
28 typedef void (*regset_fill_func
) (struct regcache
*, void *);
29 typedef void (*regset_store_func
) (struct regcache
*, const void *);
38 int get_request
, set_request
;
39 /* If NT_TYPE isn't 0, it will be passed to ptrace as the 3rd
40 argument and the 4th argument should be "const struct iovec *". */
43 enum regset_type type
;
44 regset_fill_func fill_function
;
45 regset_store_func store_function
;
47 extern struct regset_info target_regsets
[];
50 struct process_info_private
52 /* Arch-specific additions. */
53 struct arch_process_info
*arch_private
;
55 /* libthread_db-specific additions. Not NULL if this process has loaded
56 thread_db, and it is active. */
57 struct thread_db
*thread_db
;
59 /* &_r_debug. 0 if not yet determined. -1 if no PT_DYNAMIC in Phdrs. */
65 struct linux_target_ops
67 /* Architecture-specific setup. */
68 void (*arch_setup
) (void);
73 /* Regset support bitmap: 1 for registers that are transferred as a part
74 of a regset, 0 for ones that need to be handled individually. This
75 can be NULL if all registers are transferred with regsets or regsets
77 unsigned char *regset_bitmap
;
78 int (*cannot_fetch_register
) (int);
80 /* Returns 0 if we can store the register, 1 if we can not
81 store the register, and 2 if failure to store the register
83 int (*cannot_store_register
) (int);
84 CORE_ADDR (*get_pc
) (struct regcache
*regcache
);
85 void (*set_pc
) (struct regcache
*regcache
, CORE_ADDR newpc
);
86 const unsigned char *breakpoint
;
88 CORE_ADDR (*breakpoint_reinsert_addr
) (void);
90 int decr_pc_after_break
;
91 int (*breakpoint_at
) (CORE_ADDR pc
);
93 /* Breakpoint and watchpoint related functions. See target.h for
95 int (*insert_point
) (char type
, CORE_ADDR addr
, int len
);
96 int (*remove_point
) (char type
, CORE_ADDR addr
, int len
);
97 int (*stopped_by_watchpoint
) (void);
98 CORE_ADDR (*stopped_data_address
) (void);
100 /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular
101 for registers smaller than an xfer unit). */
102 void (*collect_ptrace_register
) (struct regcache
*regcache
,
103 int regno
, char *buf
);
104 void (*supply_ptrace_register
) (struct regcache
*regcache
,
105 int regno
, const char *buf
);
107 /* Hook to convert from target format to ptrace format and back.
108 Returns true if any conversion was done; false otherwise.
109 If DIRECTION is 1, then copy from INF to NATIVE.
110 If DIRECTION is 0, copy from NATIVE to INF. */
111 int (*siginfo_fixup
) (siginfo_t
*native
, void *inf
, int direction
);
113 /* Hook to call when a new process is created or attached to.
114 If extra per-process architecture-specific data is needed,
116 struct arch_process_info
* (*new_process
) (void);
118 /* Hook to call when a new thread is detected.
119 If extra per-thread architecture-specific data is needed,
121 struct arch_lwp_info
* (*new_thread
) (void);
123 /* Hook to call prior to resuming a thread. */
124 void (*prepare_to_resume
) (struct lwp_info
*);
126 /* Hook to support target specific qSupported. */
127 void (*process_qsupported
) (const char *);
129 /* Returns true if the low target supports tracepoints. */
130 int (*supports_tracepoints
) (void);
132 /* Fill ADDRP with the thread area address of LWPID. Returns 0 on
133 success, -1 on failure. */
134 int (*get_thread_area
) (int lwpid
, CORE_ADDR
*addrp
);
136 /* Install a fast tracepoint jump pad. See target.h for
138 int (*install_fast_tracepoint_jump_pad
) (CORE_ADDR tpoint
, CORE_ADDR tpaddr
,
142 CORE_ADDR
*jump_entry
,
143 CORE_ADDR
*trampoline
,
144 ULONGEST
*trampoline_size
,
145 unsigned char *jjump_pad_insn
,
146 ULONGEST
*jjump_pad_insn_size
,
147 CORE_ADDR
*adjusted_insn_addr
,
148 CORE_ADDR
*adjusted_insn_addr_end
,
151 /* Return the bytecode operations vector for the current inferior.
152 Returns NULL if bytecode compilation is not supported. */
153 struct emit_ops
*(*emit_ops
) (void);
155 /* Return the minimum length of an instruction that can be safely overwritten
156 for use as a fast tracepoint. */
157 int (*get_min_fast_tracepoint_insn_len
) (void);
161 extern struct linux_target_ops the_low_target
;
163 #define ptid_of(proc) ((proc)->head.id)
164 #define pid_of(proc) ptid_get_pid ((proc)->head.id)
165 #define lwpid_of(proc) ptid_get_lwp ((proc)->head.id)
167 #define get_lwp(inf) ((struct lwp_info *)(inf))
168 #define get_thread_lwp(thr) (get_lwp (inferior_target_data (thr)))
169 #define get_lwp_thread(proc) ((struct thread_info *) \
170 find_inferior_id (&all_threads, \
171 get_lwp (proc)->head.id))
175 struct inferior_list_entry head
;
177 /* If this flag is set, the next SIGSTOP will be ignored (the
178 process will be immediately resumed). This means that either we
179 sent the SIGSTOP to it ourselves and got some other pending event
180 (so the SIGSTOP is still pending), or that we stopped the
181 inferior implicitly via PTRACE_ATTACH and have not waited for it
185 /* When this is true, we shall not try to resume this thread, even
186 if last_resume_kind isn't resume_stop. */
189 /* If this flag is set, the lwp is known to be stopped right now (stop
190 event already received in a wait()). */
193 /* If this flag is set, the lwp is known to be dead already (exit
194 event already received in a wait(), and is cached in
198 /* When stopped is set, the last wait status recorded for this lwp. */
201 /* When stopped is set, this is where the lwp stopped, with
202 decr_pc_after_break already accounted for. */
205 /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet
207 int status_pending_p
;
210 /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data
212 int stopped_by_watchpoint
;
214 /* On architectures where it is possible to know the data address of
215 a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and
216 contains such data address. Only valid if STOPPED_BY_WATCHPOINT
218 CORE_ADDR stopped_data_address
;
220 /* If this is non-zero, it is a breakpoint to be reinserted at our next
221 stop (SIGTRAP stops only). */
222 CORE_ADDR bp_reinsert
;
224 /* If this flag is set, the last continue operation at the ptrace
225 level on this process was a single-step. */
228 /* If this flag is set, we need to set the event request flags the
229 next time we see this LWP stop. */
230 int must_set_ptrace_flags
;
232 /* If this is non-zero, it points to a chain of signals which need to
233 be delivered to this process. */
234 struct pending_signals
*pending_signals
;
236 /* A link used when resuming. It is initialized from the resume request,
237 and then processed and cleared in linux_resume_one_lwp. */
238 struct thread_resume
*resume
;
240 /* True if it is known that this lwp is presently collecting a fast
241 tracepoint (it is in the jump pad or in some code that will
242 return to the jump pad. Normally, we won't care about this, but
243 we will if a signal arrives to this lwp while it is
245 int collecting_fast_tracepoint
;
247 /* If this is non-zero, it points to a chain of signals which need
248 to be reported to GDB. These were deferred because the thread
249 was doing a fast tracepoint collect when they arrived. */
250 struct pending_signals
*pending_signals_to_report
;
252 /* When collecting_fast_tracepoint is first found to be 1, we insert
253 a exit-jump-pad-quickly breakpoint. This is it. */
254 struct breakpoint
*exit_jump_pad_bkpt
;
256 /* True if the LWP was seen stop at an internal breakpoint and needs
257 stepping over later when it is resumed. */
261 #ifdef HAVE_THREAD_DB_H
262 /* The thread handle, used for e.g. TLS access. Only valid if
263 THREAD_KNOWN is set. */
267 /* Arch-specific additions. */
268 struct arch_lwp_info
*arch_private
;
271 extern struct inferior_list all_lwps
;
273 int linux_pid_exe_is_elf_64_file (int pid
);
275 void linux_attach_lwp (unsigned long pid
);
276 struct lwp_info
*find_lwp_pid (ptid_t ptid
);
277 void linux_stop_lwp (struct lwp_info
*lwp
);
279 /* From thread-db.c */
280 int thread_db_init (int use_events
);
281 void thread_db_detach (struct process_info
*);
282 void thread_db_mourn (struct process_info
*);
283 int thread_db_handle_monitor_command (char *);
284 int thread_db_get_tls_address (struct thread_info
*thread
, CORE_ADDR offset
,
285 CORE_ADDR load_module
, CORE_ADDR
*address
);
286 int thread_db_look_up_one_symbol (const char *name
, CORE_ADDR
*addrp
);