Commit | Line | Data |
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58caa3dc | 1 | /* Internal interfaces for the GNU/Linux specific target code for gdbserver. |
0b302171 JB |
2 | Copyright (C) 2002, 2004-2005, 2007-2012 Free Software Foundation, |
3 | Inc. | |
58caa3dc DJ |
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 |
58caa3dc DJ |
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/>. */ |
58caa3dc | 19 | |
dae5f5cf DJ |
20 | #ifdef HAVE_THREAD_DB_H |
21 | #include <thread_db.h> | |
22 | #endif | |
a5362b9a | 23 | #include <signal.h> |
dae5f5cf | 24 | |
95954743 PA |
25 | #include "gdb_proc_service.h" |
26 | ||
58caa3dc | 27 | #ifdef HAVE_LINUX_REGSETS |
442ea881 PA |
28 | typedef void (*regset_fill_func) (struct regcache *, void *); |
29 | typedef void (*regset_store_func) (struct regcache *, const void *); | |
0d62e5e8 DJ |
30 | enum regset_type { |
31 | GENERAL_REGS, | |
32 | FP_REGS, | |
33 | EXTENDED_REGS, | |
34 | }; | |
35 | ||
58caa3dc DJ |
36 | struct regset_info |
37 | { | |
38 | int get_request, set_request; | |
1570b33e L |
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 *". */ | |
41 | int nt_type; | |
58caa3dc | 42 | int size; |
0d62e5e8 DJ |
43 | enum regset_type type; |
44 | regset_fill_func fill_function; | |
45 | regset_store_func store_function; | |
58caa3dc DJ |
46 | }; |
47 | extern struct regset_info target_regsets[]; | |
48 | #endif | |
2ec06d2e | 49 | |
95954743 PA |
50 | struct process_info_private |
51 | { | |
aa5ca48f DE |
52 | /* Arch-specific additions. */ |
53 | struct arch_process_info *arch_private; | |
cdbfd419 PP |
54 | |
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; | |
2268b414 JK |
58 | |
59 | /* &_r_debug. 0 if not yet determined. -1 if no PT_DYNAMIC in Phdrs. */ | |
60 | CORE_ADDR r_debug; | |
95954743 PA |
61 | }; |
62 | ||
aa5ca48f DE |
63 | struct lwp_info; |
64 | ||
2ec06d2e DJ |
65 | struct linux_target_ops |
66 | { | |
d05b4ac3 UW |
67 | /* Architecture-specific setup. */ |
68 | void (*arch_setup) (void); | |
69 | ||
2ec06d2e DJ |
70 | int num_regs; |
71 | int *regmap; | |
1faeff08 MR |
72 | |
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 | |
76 | are not supported. */ | |
77 | unsigned char *regset_bitmap; | |
2ec06d2e | 78 | int (*cannot_fetch_register) (int); |
bc1e36ca DJ |
79 | |
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 | |
82 | is acceptable. */ | |
2ec06d2e | 83 | int (*cannot_store_register) (int); |
c14dfd32 PA |
84 | |
85 | /* Hook to fetch a register in some non-standard way. Used for | |
86 | example by backends that have read-only registers with hardcoded | |
87 | values (e.g., IA64's gr0/fr0/fr1). Returns true if register | |
88 | REGNO was supplied, false if not, and we should fallback to the | |
89 | standard ptrace methods. */ | |
90 | int (*fetch_register) (struct regcache *regcache, int regno); | |
91 | ||
442ea881 PA |
92 | CORE_ADDR (*get_pc) (struct regcache *regcache); |
93 | void (*set_pc) (struct regcache *regcache, CORE_ADDR newpc); | |
f450004a | 94 | const unsigned char *breakpoint; |
611cb4a5 DJ |
95 | int breakpoint_len; |
96 | CORE_ADDR (*breakpoint_reinsert_addr) (void); | |
0d62e5e8 | 97 | |
0d62e5e8 DJ |
98 | int decr_pc_after_break; |
99 | int (*breakpoint_at) (CORE_ADDR pc); | |
e013ee27 | 100 | |
d993e290 PA |
101 | /* Breakpoint and watchpoint related functions. See target.h for |
102 | comments. */ | |
103 | int (*insert_point) (char type, CORE_ADDR addr, int len); | |
104 | int (*remove_point) (char type, CORE_ADDR addr, int len); | |
e013ee27 OF |
105 | int (*stopped_by_watchpoint) (void); |
106 | CORE_ADDR (*stopped_data_address) (void); | |
107 | ||
ee1a7ae4 UW |
108 | /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular |
109 | for registers smaller than an xfer unit). */ | |
442ea881 PA |
110 | void (*collect_ptrace_register) (struct regcache *regcache, |
111 | int regno, char *buf); | |
112 | void (*supply_ptrace_register) (struct regcache *regcache, | |
113 | int regno, const char *buf); | |
d0722149 DE |
114 | |
115 | /* Hook to convert from target format to ptrace format and back. | |
116 | Returns true if any conversion was done; false otherwise. | |
117 | If DIRECTION is 1, then copy from INF to NATIVE. | |
118 | If DIRECTION is 0, copy from NATIVE to INF. */ | |
a5362b9a | 119 | int (*siginfo_fixup) (siginfo_t *native, void *inf, int direction); |
aa5ca48f DE |
120 | |
121 | /* Hook to call when a new process is created or attached to. | |
122 | If extra per-process architecture-specific data is needed, | |
123 | allocate it here. */ | |
124 | struct arch_process_info * (*new_process) (void); | |
125 | ||
126 | /* Hook to call when a new thread is detected. | |
127 | If extra per-thread architecture-specific data is needed, | |
128 | allocate it here. */ | |
129 | struct arch_lwp_info * (*new_thread) (void); | |
130 | ||
131 | /* Hook to call prior to resuming a thread. */ | |
132 | void (*prepare_to_resume) (struct lwp_info *); | |
1570b33e L |
133 | |
134 | /* Hook to support target specific qSupported. */ | |
135 | void (*process_qsupported) (const char *); | |
219f2f23 PA |
136 | |
137 | /* Returns true if the low target supports tracepoints. */ | |
138 | int (*supports_tracepoints) (void); | |
fa593d66 PA |
139 | |
140 | /* Fill ADDRP with the thread area address of LWPID. Returns 0 on | |
141 | success, -1 on failure. */ | |
142 | int (*get_thread_area) (int lwpid, CORE_ADDR *addrp); | |
143 | ||
144 | /* Install a fast tracepoint jump pad. See target.h for | |
145 | comments. */ | |
146 | int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr, | |
147 | CORE_ADDR collector, | |
148 | CORE_ADDR lockaddr, | |
149 | ULONGEST orig_size, | |
150 | CORE_ADDR *jump_entry, | |
405f8e94 SS |
151 | CORE_ADDR *trampoline, |
152 | ULONGEST *trampoline_size, | |
fa593d66 PA |
153 | unsigned char *jjump_pad_insn, |
154 | ULONGEST *jjump_pad_insn_size, | |
155 | CORE_ADDR *adjusted_insn_addr, | |
405f8e94 SS |
156 | CORE_ADDR *adjusted_insn_addr_end, |
157 | char *err); | |
6a271cae PA |
158 | |
159 | /* Return the bytecode operations vector for the current inferior. | |
160 | Returns NULL if bytecode compilation is not supported. */ | |
161 | struct emit_ops *(*emit_ops) (void); | |
405f8e94 SS |
162 | |
163 | /* Return the minimum length of an instruction that can be safely overwritten | |
164 | for use as a fast tracepoint. */ | |
165 | int (*get_min_fast_tracepoint_insn_len) (void); | |
166 | ||
2ec06d2e DJ |
167 | }; |
168 | ||
169 | extern struct linux_target_ops the_low_target; | |
0d62e5e8 | 170 | |
aa5ca48f | 171 | #define ptid_of(proc) ((proc)->head.id) |
95954743 PA |
172 | #define pid_of(proc) ptid_get_pid ((proc)->head.id) |
173 | #define lwpid_of(proc) ptid_get_lwp ((proc)->head.id) | |
bd99dc85 | 174 | |
54a0b537 PA |
175 | #define get_lwp(inf) ((struct lwp_info *)(inf)) |
176 | #define get_thread_lwp(thr) (get_lwp (inferior_target_data (thr))) | |
177 | #define get_lwp_thread(proc) ((struct thread_info *) \ | |
178 | find_inferior_id (&all_threads, \ | |
95954743 | 179 | get_lwp (proc)->head.id)) |
0d62e5e8 | 180 | |
54a0b537 | 181 | struct lwp_info |
0d62e5e8 DJ |
182 | { |
183 | struct inferior_list_entry head; | |
0d62e5e8 | 184 | |
ae13219e DJ |
185 | /* If this flag is set, the next SIGSTOP will be ignored (the |
186 | process will be immediately resumed). This means that either we | |
187 | sent the SIGSTOP to it ourselves and got some other pending event | |
188 | (so the SIGSTOP is still pending), or that we stopped the | |
189 | inferior implicitly via PTRACE_ATTACH and have not waited for it | |
190 | yet. */ | |
0d62e5e8 DJ |
191 | int stop_expected; |
192 | ||
d50171e4 PA |
193 | /* When this is true, we shall not try to resume this thread, even |
194 | if last_resume_kind isn't resume_stop. */ | |
bd99dc85 PA |
195 | int suspended; |
196 | ||
197 | /* If this flag is set, the lwp is known to be stopped right now (stop | |
0d62e5e8 DJ |
198 | event already received in a wait()). */ |
199 | int stopped; | |
200 | ||
95954743 PA |
201 | /* If this flag is set, the lwp is known to be dead already (exit |
202 | event already received in a wait(), and is cached in | |
203 | status_pending). */ | |
204 | int dead; | |
205 | ||
bd99dc85 | 206 | /* When stopped is set, the last wait status recorded for this lwp. */ |
32ca6d61 DJ |
207 | int last_status; |
208 | ||
d50171e4 PA |
209 | /* When stopped is set, this is where the lwp stopped, with |
210 | decr_pc_after_break already accounted for. */ | |
211 | CORE_ADDR stop_pc; | |
212 | ||
0d62e5e8 DJ |
213 | /* If this flag is set, STATUS_PENDING is a waitstatus that has not yet |
214 | been reported. */ | |
215 | int status_pending_p; | |
216 | int status_pending; | |
217 | ||
c3adc08c PA |
218 | /* STOPPED_BY_WATCHPOINT is non-zero if this LWP stopped with a data |
219 | watchpoint trap. */ | |
220 | int stopped_by_watchpoint; | |
221 | ||
222 | /* On architectures where it is possible to know the data address of | |
223 | a triggered watchpoint, STOPPED_DATA_ADDRESS is non-zero, and | |
224 | contains such data address. Only valid if STOPPED_BY_WATCHPOINT | |
225 | is true. */ | |
226 | CORE_ADDR stopped_data_address; | |
227 | ||
0d62e5e8 DJ |
228 | /* If this is non-zero, it is a breakpoint to be reinserted at our next |
229 | stop (SIGTRAP stops only). */ | |
230 | CORE_ADDR bp_reinsert; | |
231 | ||
d50171e4 PA |
232 | /* If this flag is set, the last continue operation at the ptrace |
233 | level on this process was a single-step. */ | |
0d62e5e8 DJ |
234 | int stepping; |
235 | ||
a6dbe5df PA |
236 | /* If this flag is set, we need to set the event request flags the |
237 | next time we see this LWP stop. */ | |
238 | int must_set_ptrace_flags; | |
239 | ||
0d62e5e8 DJ |
240 | /* If this is non-zero, it points to a chain of signals which need to |
241 | be delivered to this process. */ | |
242 | struct pending_signals *pending_signals; | |
5544ad89 DJ |
243 | |
244 | /* A link used when resuming. It is initialized from the resume request, | |
54a0b537 | 245 | and then processed and cleared in linux_resume_one_lwp. */ |
5544ad89 | 246 | struct thread_resume *resume; |
dae5f5cf | 247 | |
fa593d66 PA |
248 | /* True if it is known that this lwp is presently collecting a fast |
249 | tracepoint (it is in the jump pad or in some code that will | |
250 | return to the jump pad. Normally, we won't care about this, but | |
251 | we will if a signal arrives to this lwp while it is | |
252 | collecting. */ | |
253 | int collecting_fast_tracepoint; | |
254 | ||
255 | /* If this is non-zero, it points to a chain of signals which need | |
256 | to be reported to GDB. These were deferred because the thread | |
257 | was doing a fast tracepoint collect when they arrived. */ | |
258 | struct pending_signals *pending_signals_to_report; | |
259 | ||
260 | /* When collecting_fast_tracepoint is first found to be 1, we insert | |
261 | a exit-jump-pad-quickly breakpoint. This is it. */ | |
262 | struct breakpoint *exit_jump_pad_bkpt; | |
263 | ||
d50171e4 PA |
264 | /* True if the LWP was seen stop at an internal breakpoint and needs |
265 | stepping over later when it is resumed. */ | |
266 | int need_step_over; | |
267 | ||
24a09b5f | 268 | int thread_known; |
dae5f5cf | 269 | #ifdef HAVE_THREAD_DB_H |
24a09b5f DJ |
270 | /* The thread handle, used for e.g. TLS access. Only valid if |
271 | THREAD_KNOWN is set. */ | |
dae5f5cf DJ |
272 | td_thrhandle_t th; |
273 | #endif | |
aa5ca48f DE |
274 | |
275 | /* Arch-specific additions. */ | |
276 | struct arch_lwp_info *arch_private; | |
0d62e5e8 | 277 | }; |
5544ad89 | 278 | |
54a0b537 | 279 | extern struct inferior_list all_lwps; |
0d62e5e8 | 280 | |
be07f1a2 | 281 | int linux_pid_exe_is_elf_64_file (int pid); |
d0722149 | 282 | |
24a09b5f | 283 | void linux_attach_lwp (unsigned long pid); |
cdbfd419 | 284 | struct lwp_info *find_lwp_pid (ptid_t ptid); |
964e4306 | 285 | void linux_stop_lwp (struct lwp_info *lwp); |
0d62e5e8 | 286 | |
cdbfd419 | 287 | /* From thread-db.c */ |
24a09b5f | 288 | int thread_db_init (int use_events); |
8336d594 PA |
289 | void thread_db_detach (struct process_info *); |
290 | void thread_db_mourn (struct process_info *); | |
cdbfd419 | 291 | int thread_db_handle_monitor_command (char *); |
dae5f5cf DJ |
292 | int thread_db_get_tls_address (struct thread_info *thread, CORE_ADDR offset, |
293 | CORE_ADDR load_module, CORE_ADDR *address); | |
9836d6ea | 294 | int thread_db_look_up_one_symbol (const char *name, CORE_ADDR *addrp); |