Commit | Line | Data |
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176eb98c MS |
1 | /* GNU/Linux/AArch64 specific low level interface, for the remote server for |
2 | GDB. | |
3 | ||
32d0add0 | 4 | Copyright (C) 2009-2015 Free Software Foundation, Inc. |
176eb98c MS |
5 | Contributed by ARM Ltd. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "server.h" | |
23 | #include "linux-low.h" | |
554717a3 | 24 | #include "nat/aarch64-linux-hw-point.h" |
3b53ae99 | 25 | #include "linux-aarch32-low.h" |
176eb98c MS |
26 | #include "elf/common.h" |
27 | ||
28 | #include <signal.h> | |
29 | #include <sys/user.h> | |
5826e159 | 30 | #include "nat/gdb_ptrace.h" |
e9dae05e | 31 | #include <asm/ptrace.h> |
176eb98c MS |
32 | #include <sys/uio.h> |
33 | ||
34 | #include "gdb_proc_service.h" | |
35 | ||
36 | /* Defined in auto-generated files. */ | |
37 | void init_registers_aarch64 (void); | |
3aee8918 | 38 | extern const struct target_desc *tdesc_aarch64; |
176eb98c | 39 | |
176eb98c MS |
40 | #ifdef HAVE_SYS_REG_H |
41 | #include <sys/reg.h> | |
42 | #endif | |
43 | ||
44 | #define AARCH64_X_REGS_NUM 31 | |
45 | #define AARCH64_V_REGS_NUM 32 | |
46 | #define AARCH64_X0_REGNO 0 | |
47 | #define AARCH64_SP_REGNO 31 | |
48 | #define AARCH64_PC_REGNO 32 | |
49 | #define AARCH64_CPSR_REGNO 33 | |
50 | #define AARCH64_V0_REGNO 34 | |
bf330350 CU |
51 | #define AARCH64_FPSR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM) |
52 | #define AARCH64_FPCR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 1) | |
176eb98c | 53 | |
bf330350 | 54 | #define AARCH64_NUM_REGS (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 2) |
176eb98c | 55 | |
176eb98c MS |
56 | /* Per-process arch-specific data we want to keep. */ |
57 | ||
58 | struct arch_process_info | |
59 | { | |
60 | /* Hardware breakpoint/watchpoint data. | |
61 | The reason for them to be per-process rather than per-thread is | |
62 | due to the lack of information in the gdbserver environment; | |
63 | gdbserver is not told that whether a requested hardware | |
64 | breakpoint/watchpoint is thread specific or not, so it has to set | |
65 | each hw bp/wp for every thread in the current process. The | |
66 | higher level bp/wp management in gdb will resume a thread if a hw | |
67 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
68 | same for each thread, it is reasonable for the data to live here. | |
69 | */ | |
70 | struct aarch64_debug_reg_state debug_reg_state; | |
71 | }; | |
72 | ||
3b53ae99 YQ |
73 | /* Return true if the size of register 0 is 8 byte. */ |
74 | ||
75 | static int | |
76 | is_64bit_tdesc (void) | |
77 | { | |
78 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
79 | ||
80 | return register_size (regcache->tdesc, 0) == 8; | |
81 | } | |
82 | ||
421530db PL |
83 | /* Implementation of linux_target_ops method "cannot_store_register". */ |
84 | ||
176eb98c MS |
85 | static int |
86 | aarch64_cannot_store_register (int regno) | |
87 | { | |
88 | return regno >= AARCH64_NUM_REGS; | |
89 | } | |
90 | ||
421530db PL |
91 | /* Implementation of linux_target_ops method "cannot_fetch_register". */ |
92 | ||
176eb98c MS |
93 | static int |
94 | aarch64_cannot_fetch_register (int regno) | |
95 | { | |
96 | return regno >= AARCH64_NUM_REGS; | |
97 | } | |
98 | ||
99 | static void | |
100 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
101 | { | |
102 | struct user_pt_regs *regset = buf; | |
103 | int i; | |
104 | ||
105 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
106 | collect_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]); | |
107 | collect_register (regcache, AARCH64_SP_REGNO, ®set->sp); | |
108 | collect_register (regcache, AARCH64_PC_REGNO, ®set->pc); | |
109 | collect_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate); | |
110 | } | |
111 | ||
112 | static void | |
113 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
114 | { | |
115 | const struct user_pt_regs *regset = buf; | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
119 | supply_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]); | |
120 | supply_register (regcache, AARCH64_SP_REGNO, ®set->sp); | |
121 | supply_register (regcache, AARCH64_PC_REGNO, ®set->pc); | |
122 | supply_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate); | |
123 | } | |
124 | ||
125 | static void | |
126 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
127 | { | |
128 | struct user_fpsimd_state *regset = buf; | |
129 | int i; | |
130 | ||
131 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
132 | collect_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]); | |
bf330350 CU |
133 | collect_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr); |
134 | collect_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr); | |
176eb98c MS |
135 | } |
136 | ||
137 | static void | |
138 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
139 | { | |
140 | const struct user_fpsimd_state *regset = buf; | |
141 | int i; | |
142 | ||
143 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
144 | supply_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]); | |
bf330350 CU |
145 | supply_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr); |
146 | supply_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr); | |
176eb98c MS |
147 | } |
148 | ||
176eb98c MS |
149 | /* Enable miscellaneous debugging output. The name is historical - it |
150 | was originally used to debug LinuxThreads support. */ | |
151 | extern int debug_threads; | |
152 | ||
421530db PL |
153 | /* Implementation of linux_target_ops method "get_pc". */ |
154 | ||
176eb98c MS |
155 | static CORE_ADDR |
156 | aarch64_get_pc (struct regcache *regcache) | |
157 | { | |
158 | unsigned long pc; | |
159 | ||
160 | collect_register_by_name (regcache, "pc", &pc); | |
161 | if (debug_threads) | |
87ce2a04 | 162 | debug_printf ("stop pc is %08lx\n", pc); |
176eb98c MS |
163 | return pc; |
164 | } | |
165 | ||
421530db PL |
166 | /* Implementation of linux_target_ops method "set_pc". */ |
167 | ||
176eb98c MS |
168 | static void |
169 | aarch64_set_pc (struct regcache *regcache, CORE_ADDR pc) | |
170 | { | |
171 | unsigned long newpc = pc; | |
172 | supply_register_by_name (regcache, "pc", &newpc); | |
173 | } | |
174 | ||
176eb98c MS |
175 | #define aarch64_breakpoint_len 4 |
176 | ||
37d66942 PL |
177 | /* AArch64 BRK software debug mode instruction. |
178 | This instruction needs to match gdb/aarch64-tdep.c | |
179 | (aarch64_default_breakpoint). */ | |
180 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 181 | |
421530db PL |
182 | /* Implementation of linux_target_ops method "breakpoint_at". */ |
183 | ||
176eb98c MS |
184 | static int |
185 | aarch64_breakpoint_at (CORE_ADDR where) | |
186 | { | |
37d66942 | 187 | gdb_byte insn[aarch64_breakpoint_len]; |
176eb98c | 188 | |
37d66942 PL |
189 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
190 | aarch64_breakpoint_len); | |
191 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) | |
176eb98c MS |
192 | return 1; |
193 | ||
194 | return 0; | |
195 | } | |
196 | ||
176eb98c MS |
197 | static void |
198 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
199 | { | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
203 | { | |
204 | state->dr_addr_bp[i] = 0; | |
205 | state->dr_ctrl_bp[i] = 0; | |
206 | state->dr_ref_count_bp[i] = 0; | |
207 | } | |
208 | ||
209 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
210 | { | |
211 | state->dr_addr_wp[i] = 0; | |
212 | state->dr_ctrl_wp[i] = 0; | |
213 | state->dr_ref_count_wp[i] = 0; | |
214 | } | |
215 | } | |
216 | ||
176eb98c MS |
217 | struct aarch64_dr_update_callback_param |
218 | { | |
219 | int pid; | |
220 | int is_watchpoint; | |
221 | unsigned int idx; | |
222 | }; | |
223 | ||
224 | /* Callback function which records the information about the change of | |
225 | one hardware breakpoint/watchpoint setting for the thread ENTRY. | |
226 | The information is passed in via PTR. | |
227 | N.B. The actual updating of hardware debug registers is not | |
228 | carried out until the moment the thread is resumed. */ | |
229 | ||
230 | static int | |
231 | debug_reg_change_callback (struct inferior_list_entry *entry, void *ptr) | |
232 | { | |
d86d4aaf DE |
233 | struct thread_info *thread = (struct thread_info *) entry; |
234 | struct lwp_info *lwp = get_thread_lwp (thread); | |
176eb98c MS |
235 | struct aarch64_dr_update_callback_param *param_p |
236 | = (struct aarch64_dr_update_callback_param *) ptr; | |
237 | int pid = param_p->pid; | |
238 | int idx = param_p->idx; | |
239 | int is_watchpoint = param_p->is_watchpoint; | |
240 | struct arch_lwp_info *info = lwp->arch_private; | |
241 | dr_changed_t *dr_changed_ptr; | |
242 | dr_changed_t dr_changed; | |
243 | ||
c5e92cca | 244 | if (show_debug_regs) |
176eb98c MS |
245 | { |
246 | fprintf (stderr, "debug_reg_change_callback: \n\tOn entry:\n"); | |
247 | fprintf (stderr, "\tpid%d, tid: %ld, dr_changed_bp=0x%llx, " | |
248 | "dr_changed_wp=0x%llx\n", | |
d86d4aaf | 249 | pid, lwpid_of (thread), info->dr_changed_bp, |
176eb98c MS |
250 | info->dr_changed_wp); |
251 | } | |
252 | ||
253 | dr_changed_ptr = is_watchpoint ? &info->dr_changed_wp | |
254 | : &info->dr_changed_bp; | |
255 | dr_changed = *dr_changed_ptr; | |
256 | ||
257 | /* Only update the threads of this process. */ | |
d86d4aaf | 258 | if (pid_of (thread) == pid) |
176eb98c MS |
259 | { |
260 | gdb_assert (idx >= 0 | |
261 | && (idx <= (is_watchpoint ? aarch64_num_wp_regs | |
262 | : aarch64_num_bp_regs))); | |
263 | ||
264 | /* The following assertion is not right, as there can be changes | |
265 | that have not been made to the hardware debug registers | |
266 | before new changes overwrite the old ones. This can happen, | |
267 | for instance, when the breakpoint/watchpoint hit one of the | |
268 | threads and the user enters continue; then what happens is: | |
269 | 1) all breakpoints/watchpoints are removed for all threads; | |
270 | 2) a single step is carried out for the thread that was hit; | |
271 | 3) all of the points are inserted again for all threads; | |
272 | 4) all threads are resumed. | |
273 | The 2nd step will only affect the one thread in which the | |
274 | bp/wp was hit, which means only that one thread is resumed; | |
275 | remember that the actual updating only happen in | |
276 | aarch64_linux_prepare_to_resume, so other threads remain | |
277 | stopped during the removal and insertion of bp/wp. Therefore | |
278 | for those threads, the change of insertion of the bp/wp | |
279 | overwrites that of the earlier removals. (The situation may | |
280 | be different when bp/wp is steppable, or in the non-stop | |
281 | mode.) */ | |
282 | /* gdb_assert (DR_N_HAS_CHANGED (dr_changed, idx) == 0); */ | |
283 | ||
284 | /* The actual update is done later just before resuming the lwp, | |
285 | we just mark that one register pair needs updating. */ | |
286 | DR_MARK_N_CHANGED (dr_changed, idx); | |
287 | *dr_changed_ptr = dr_changed; | |
288 | ||
289 | /* If the lwp isn't stopped, force it to momentarily pause, so | |
290 | we can update its debug registers. */ | |
291 | if (!lwp->stopped) | |
292 | linux_stop_lwp (lwp); | |
293 | } | |
294 | ||
c5e92cca | 295 | if (show_debug_regs) |
176eb98c MS |
296 | { |
297 | fprintf (stderr, "\tOn exit:\n\tpid%d, tid: %ld, dr_changed_bp=0x%llx, " | |
298 | "dr_changed_wp=0x%llx\n", | |
d86d4aaf DE |
299 | pid, lwpid_of (thread), info->dr_changed_bp, |
300 | info->dr_changed_wp); | |
176eb98c MS |
301 | } |
302 | ||
303 | return 0; | |
304 | } | |
305 | ||
306 | /* Notify each thread that their IDXth breakpoint/watchpoint register | |
307 | pair needs to be updated. The message will be recorded in each | |
308 | thread's arch-specific data area, the actual updating will be done | |
309 | when the thread is resumed. */ | |
310 | ||
311 | void | |
312 | aarch64_notify_debug_reg_change (const struct aarch64_debug_reg_state *state, | |
313 | int is_watchpoint, unsigned int idx) | |
314 | { | |
315 | struct aarch64_dr_update_callback_param param; | |
316 | ||
317 | /* Only update the threads of this process. */ | |
0bfdf32f | 318 | param.pid = pid_of (current_thread); |
176eb98c MS |
319 | |
320 | param.is_watchpoint = is_watchpoint; | |
321 | param.idx = idx; | |
322 | ||
d86d4aaf | 323 | find_inferior (&all_threads, debug_reg_change_callback, (void *) ¶m); |
176eb98c MS |
324 | } |
325 | ||
326 | ||
327 | /* Return the pointer to the debug register state structure in the | |
328 | current process' arch-specific data area. */ | |
329 | ||
330 | static struct aarch64_debug_reg_state * | |
331 | aarch64_get_debug_reg_state () | |
332 | { | |
333 | struct process_info *proc; | |
334 | ||
335 | proc = current_process (); | |
fe978cb0 | 336 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
337 | } |
338 | ||
421530db PL |
339 | /* Implementation of linux_target_ops method "supports_z_point_type". */ |
340 | ||
4ff0d3d8 PA |
341 | static int |
342 | aarch64_supports_z_point_type (char z_type) | |
343 | { | |
344 | switch (z_type) | |
345 | { | |
96c97461 | 346 | case Z_PACKET_SW_BP: |
4ff0d3d8 PA |
347 | case Z_PACKET_HW_BP: |
348 | case Z_PACKET_WRITE_WP: | |
349 | case Z_PACKET_READ_WP: | |
350 | case Z_PACKET_ACCESS_WP: | |
351 | return 1; | |
352 | default: | |
4ff0d3d8 PA |
353 | return 0; |
354 | } | |
355 | } | |
356 | ||
421530db | 357 | /* Implementation of linux_target_ops method "insert_point". |
176eb98c | 358 | |
421530db PL |
359 | It actually only records the info of the to-be-inserted bp/wp; |
360 | the actual insertion will happen when threads are resumed. */ | |
176eb98c MS |
361 | |
362 | static int | |
802e8e6d PA |
363 | aarch64_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
364 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
365 | { |
366 | int ret; | |
4ff0d3d8 | 367 | enum target_hw_bp_type targ_type; |
c67ca4de | 368 | struct aarch64_debug_reg_state *state = aarch64_get_debug_reg_state (); |
4ff0d3d8 | 369 | |
c5e92cca | 370 | if (show_debug_regs) |
176eb98c MS |
371 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
372 | (unsigned long) addr, len); | |
373 | ||
802e8e6d PA |
374 | /* Determine the type from the raw breakpoint type. */ |
375 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
376 | |
377 | if (targ_type != hw_execute) | |
378 | ret = | |
c67ca4de YQ |
379 | aarch64_handle_watchpoint (targ_type, addr, len, 1 /* is_insert */, |
380 | state); | |
176eb98c MS |
381 | else |
382 | ret = | |
c67ca4de YQ |
383 | aarch64_handle_breakpoint (targ_type, addr, len, 1 /* is_insert */, |
384 | state); | |
176eb98c | 385 | |
60a191ed | 386 | if (show_debug_regs) |
176eb98c MS |
387 | aarch64_show_debug_reg_state (aarch64_get_debug_reg_state (), |
388 | "insert_point", addr, len, targ_type); | |
389 | ||
390 | return ret; | |
391 | } | |
392 | ||
421530db | 393 | /* Implementation of linux_target_ops method "remove_point". |
176eb98c | 394 | |
421530db PL |
395 | It actually only records the info of the to-be-removed bp/wp, |
396 | the actual removal will be done when threads are resumed. */ | |
176eb98c MS |
397 | |
398 | static int | |
802e8e6d PA |
399 | aarch64_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
400 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
401 | { |
402 | int ret; | |
4ff0d3d8 | 403 | enum target_hw_bp_type targ_type; |
c67ca4de | 404 | struct aarch64_debug_reg_state *state = aarch64_get_debug_reg_state (); |
4ff0d3d8 | 405 | |
c5e92cca | 406 | if (show_debug_regs) |
176eb98c MS |
407 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
408 | (unsigned long) addr, len); | |
409 | ||
802e8e6d PA |
410 | /* Determine the type from the raw breakpoint type. */ |
411 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
412 | |
413 | /* Set up state pointers. */ | |
414 | if (targ_type != hw_execute) | |
415 | ret = | |
c67ca4de YQ |
416 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
417 | state); | |
176eb98c MS |
418 | else |
419 | ret = | |
c67ca4de YQ |
420 | aarch64_handle_breakpoint (targ_type, addr, len, 0 /* is_insert */, |
421 | state); | |
176eb98c | 422 | |
60a191ed | 423 | if (show_debug_regs) |
176eb98c MS |
424 | aarch64_show_debug_reg_state (aarch64_get_debug_reg_state (), |
425 | "remove_point", addr, len, targ_type); | |
426 | ||
427 | return ret; | |
428 | } | |
429 | ||
421530db | 430 | /* Implementation of linux_target_ops method "stopped_data_address". */ |
176eb98c MS |
431 | |
432 | static CORE_ADDR | |
433 | aarch64_stopped_data_address (void) | |
434 | { | |
435 | siginfo_t siginfo; | |
436 | int pid, i; | |
437 | struct aarch64_debug_reg_state *state; | |
438 | ||
0bfdf32f | 439 | pid = lwpid_of (current_thread); |
176eb98c MS |
440 | |
441 | /* Get the siginfo. */ | |
442 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
443 | return (CORE_ADDR) 0; | |
444 | ||
445 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
446 | if (siginfo.si_signo != SIGTRAP | |
447 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
448 | return (CORE_ADDR) 0; | |
449 | ||
450 | /* Check if the address matches any watched address. */ | |
451 | state = aarch64_get_debug_reg_state (); | |
452 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) | |
453 | { | |
454 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); | |
455 | const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr; | |
456 | const CORE_ADDR addr_watch = state->dr_addr_wp[i]; | |
457 | if (state->dr_ref_count_wp[i] | |
458 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
459 | && addr_trap >= addr_watch | |
460 | && addr_trap < addr_watch + len) | |
461 | return addr_trap; | |
462 | } | |
463 | ||
464 | return (CORE_ADDR) 0; | |
465 | } | |
466 | ||
421530db | 467 | /* Implementation of linux_target_ops method "stopped_by_watchpoint". */ |
176eb98c MS |
468 | |
469 | static int | |
470 | aarch64_stopped_by_watchpoint (void) | |
471 | { | |
472 | if (aarch64_stopped_data_address () != 0) | |
473 | return 1; | |
474 | else | |
475 | return 0; | |
476 | } | |
477 | ||
478 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
479 | ||
480 | ps_err_e | |
55fac6e0 | 481 | ps_get_thread_area (const struct ps_prochandle *ph, |
176eb98c MS |
482 | lwpid_t lwpid, int idx, void **base) |
483 | { | |
55fac6e0 MS |
484 | struct iovec iovec; |
485 | uint64_t reg; | |
486 | ||
487 | iovec.iov_base = ® | |
488 | iovec.iov_len = sizeof (reg); | |
489 | ||
490 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
176eb98c MS |
491 | return PS_ERR; |
492 | ||
493 | /* IDX is the bias from the thread pointer to the beginning of the | |
494 | thread descriptor. It has to be subtracted due to implementation | |
495 | quirks in libthread_db. */ | |
55fac6e0 | 496 | *base = (void *) (reg - idx); |
176eb98c MS |
497 | |
498 | return PS_OK; | |
499 | } | |
500 | ||
421530db | 501 | /* Implementation of linux_target_ops method "linux_new_process". */ |
176eb98c MS |
502 | |
503 | static struct arch_process_info * | |
504 | aarch64_linux_new_process (void) | |
505 | { | |
506 | struct arch_process_info *info = xcalloc (1, sizeof (*info)); | |
507 | ||
508 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
509 | ||
510 | return info; | |
511 | } | |
512 | ||
421530db | 513 | /* Implementation of linux_target_ops method "linux_new_thread". */ |
176eb98c | 514 | |
34c703da GB |
515 | static void |
516 | aarch64_linux_new_thread (struct lwp_info *lwp) | |
176eb98c MS |
517 | { |
518 | struct arch_lwp_info *info = xcalloc (1, sizeof (*info)); | |
519 | ||
520 | /* Mark that all the hardware breakpoint/watchpoint register pairs | |
521 | for this thread need to be initialized (with data from | |
522 | aarch_process_info.debug_reg_state). */ | |
523 | DR_MARK_ALL_CHANGED (info->dr_changed_bp, aarch64_num_bp_regs); | |
524 | DR_MARK_ALL_CHANGED (info->dr_changed_wp, aarch64_num_wp_regs); | |
525 | ||
34c703da | 526 | lwp->arch_private = info; |
176eb98c MS |
527 | } |
528 | ||
421530db PL |
529 | /* Implementation of linux_target_ops method "linux_new_fork". */ |
530 | ||
3a8a0396 DB |
531 | static void |
532 | aarch64_linux_new_fork (struct process_info *parent, | |
533 | struct process_info *child) | |
534 | { | |
535 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
536 | gdb_assert (parent->priv != NULL |
537 | && parent->priv->arch_private != NULL); | |
538 | gdb_assert (child->priv != NULL | |
539 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
540 | |
541 | /* Linux kernel before 2.6.33 commit | |
542 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
543 | will inherit hardware debug registers from parent | |
544 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
545 | zeroed debug registers. | |
546 | ||
547 | GDB core assumes the child inherits the watchpoints/hw | |
548 | breakpoints of the parent, and will remove them all from the | |
549 | forked off process. Copy the debug registers mirrors into the | |
550 | new process so that all breakpoints and watchpoints can be | |
551 | removed together. The debug registers mirror will become zeroed | |
552 | in the end before detaching the forked off process, thus making | |
553 | this compatible with older Linux kernels too. */ | |
554 | ||
61a7418c | 555 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
556 | } |
557 | ||
421530db PL |
558 | /* Implementation of linux_target_ops method "linux_prepare_to_resume". |
559 | ||
176eb98c MS |
560 | If the debug regs have changed, update the thread's copies. */ |
561 | ||
562 | static void | |
563 | aarch64_linux_prepare_to_resume (struct lwp_info *lwp) | |
564 | { | |
d86d4aaf DE |
565 | struct thread_info *thread = get_lwp_thread (lwp); |
566 | ptid_t ptid = ptid_of (thread); | |
176eb98c MS |
567 | struct arch_lwp_info *info = lwp->arch_private; |
568 | ||
569 | if (DR_HAS_CHANGED (info->dr_changed_bp) | |
570 | || DR_HAS_CHANGED (info->dr_changed_wp)) | |
571 | { | |
572 | int tid = ptid_get_lwp (ptid); | |
573 | struct process_info *proc = find_process_pid (ptid_get_pid (ptid)); | |
574 | struct aarch64_debug_reg_state *state | |
fe978cb0 | 575 | = &proc->priv->arch_private->debug_reg_state; |
176eb98c | 576 | |
c5e92cca | 577 | if (show_debug_regs) |
d86d4aaf | 578 | fprintf (stderr, "prepare_to_resume thread %ld\n", lwpid_of (thread)); |
176eb98c MS |
579 | |
580 | /* Watchpoints. */ | |
581 | if (DR_HAS_CHANGED (info->dr_changed_wp)) | |
582 | { | |
583 | aarch64_linux_set_debug_regs (state, tid, 1); | |
584 | DR_CLEAR_CHANGED (info->dr_changed_wp); | |
585 | } | |
586 | ||
587 | /* Breakpoints. */ | |
588 | if (DR_HAS_CHANGED (info->dr_changed_bp)) | |
589 | { | |
590 | aarch64_linux_set_debug_regs (state, tid, 0); | |
591 | DR_CLEAR_CHANGED (info->dr_changed_bp); | |
592 | } | |
593 | } | |
594 | } | |
595 | ||
3b53ae99 YQ |
596 | /* Return the right target description according to the ELF file of |
597 | current thread. */ | |
598 | ||
599 | static const struct target_desc * | |
600 | aarch64_linux_read_description (void) | |
601 | { | |
602 | unsigned int machine; | |
603 | int is_elf64; | |
604 | int tid; | |
605 | ||
606 | tid = lwpid_of (current_thread); | |
607 | ||
608 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
609 | ||
610 | if (is_elf64) | |
611 | return tdesc_aarch64; | |
612 | else | |
613 | return tdesc_arm_with_neon; | |
614 | } | |
615 | ||
421530db PL |
616 | /* Implementation of linux_target_ops method "arch_setup". */ |
617 | ||
176eb98c MS |
618 | static void |
619 | aarch64_arch_setup (void) | |
620 | { | |
3b53ae99 | 621 | current_process ()->tdesc = aarch64_linux_read_description (); |
176eb98c | 622 | |
af1b22f3 | 623 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
624 | } |
625 | ||
3aee8918 | 626 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
627 | { |
628 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
629 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
630 | aarch64_fill_gregset, aarch64_store_gregset }, | |
631 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
632 | sizeof (struct user_fpsimd_state), FP_REGS, | |
633 | aarch64_fill_fpregset, aarch64_store_fpregset | |
634 | }, | |
635 | { 0, 0, 0, -1, -1, NULL, NULL } | |
636 | }; | |
637 | ||
3aee8918 PA |
638 | static struct regsets_info aarch64_regsets_info = |
639 | { | |
640 | aarch64_regsets, /* regsets */ | |
641 | 0, /* num_regsets */ | |
642 | NULL, /* disabled_regsets */ | |
643 | }; | |
644 | ||
3b53ae99 | 645 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
646 | { |
647 | NULL, /* regset_bitmap */ | |
c2d65f38 | 648 | NULL, /* usrregs */ |
3aee8918 PA |
649 | &aarch64_regsets_info, |
650 | }; | |
651 | ||
421530db PL |
652 | /* Implementation of linux_target_ops method "regs_info". */ |
653 | ||
3aee8918 PA |
654 | static const struct regs_info * |
655 | aarch64_regs_info (void) | |
656 | { | |
3b53ae99 YQ |
657 | if (is_64bit_tdesc ()) |
658 | return ®s_info_aarch64; | |
659 | else | |
660 | return ®s_info_aarch32; | |
3aee8918 PA |
661 | } |
662 | ||
7671bf47 PL |
663 | /* Implementation of linux_target_ops method "supports_tracepoints". */ |
664 | ||
665 | static int | |
666 | aarch64_supports_tracepoints (void) | |
667 | { | |
668 | return 1; | |
669 | } | |
670 | ||
d1d0aea1 PL |
671 | /* Implementation of linux_target_ops method "supports_range_stepping". */ |
672 | ||
673 | static int | |
674 | aarch64_supports_range_stepping (void) | |
675 | { | |
676 | return 1; | |
677 | } | |
678 | ||
176eb98c MS |
679 | struct linux_target_ops the_low_target = |
680 | { | |
681 | aarch64_arch_setup, | |
3aee8918 | 682 | aarch64_regs_info, |
176eb98c MS |
683 | aarch64_cannot_fetch_register, |
684 | aarch64_cannot_store_register, | |
421530db | 685 | NULL, /* fetch_register */ |
176eb98c MS |
686 | aarch64_get_pc, |
687 | aarch64_set_pc, | |
688 | (const unsigned char *) &aarch64_breakpoint, | |
689 | aarch64_breakpoint_len, | |
421530db PL |
690 | NULL, /* breakpoint_reinsert_addr */ |
691 | 0, /* decr_pc_after_break */ | |
176eb98c | 692 | aarch64_breakpoint_at, |
802e8e6d | 693 | aarch64_supports_z_point_type, |
176eb98c MS |
694 | aarch64_insert_point, |
695 | aarch64_remove_point, | |
696 | aarch64_stopped_by_watchpoint, | |
697 | aarch64_stopped_data_address, | |
421530db PL |
698 | NULL, /* collect_ptrace_register */ |
699 | NULL, /* supply_ptrace_register */ | |
700 | NULL, /* siginfo_fixup */ | |
176eb98c MS |
701 | aarch64_linux_new_process, |
702 | aarch64_linux_new_thread, | |
3a8a0396 | 703 | aarch64_linux_new_fork, |
176eb98c | 704 | aarch64_linux_prepare_to_resume, |
421530db | 705 | NULL, /* process_qsupported */ |
7671bf47 | 706 | aarch64_supports_tracepoints, |
d1d0aea1 PL |
707 | NULL, /* get_thread_area */ |
708 | NULL, /* install_fast_tracepoint_jump_pad */ | |
709 | NULL, /* emit_ops */ | |
710 | NULL, /* get_min_fast_tracepoint_insn_len */ | |
711 | aarch64_supports_range_stepping, | |
176eb98c | 712 | }; |
3aee8918 PA |
713 | |
714 | void | |
715 | initialize_low_arch (void) | |
716 | { | |
717 | init_registers_aarch64 (); | |
718 | ||
3b53ae99 YQ |
719 | initialize_low_arch_aarch32 (); |
720 | ||
3aee8918 PA |
721 | initialize_regsets_info (&aarch64_regsets_info); |
722 | } |