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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" | |
db3cb7cb | 24 | #include "nat/aarch64-linux.h" |
554717a3 | 25 | #include "nat/aarch64-linux-hw-point.h" |
bb903df0 | 26 | #include "arch/aarch64-insn.h" |
3b53ae99 | 27 | #include "linux-aarch32-low.h" |
176eb98c | 28 | #include "elf/common.h" |
afbe19f8 PL |
29 | #include "ax.h" |
30 | #include "tracepoint.h" | |
176eb98c MS |
31 | |
32 | #include <signal.h> | |
33 | #include <sys/user.h> | |
5826e159 | 34 | #include "nat/gdb_ptrace.h" |
e9dae05e | 35 | #include <asm/ptrace.h> |
bb903df0 PL |
36 | #include <inttypes.h> |
37 | #include <endian.h> | |
38 | #include <sys/uio.h> | |
176eb98c MS |
39 | |
40 | #include "gdb_proc_service.h" | |
41 | ||
42 | /* Defined in auto-generated files. */ | |
43 | void init_registers_aarch64 (void); | |
3aee8918 | 44 | extern const struct target_desc *tdesc_aarch64; |
176eb98c | 45 | |
176eb98c MS |
46 | #ifdef HAVE_SYS_REG_H |
47 | #include <sys/reg.h> | |
48 | #endif | |
49 | ||
50 | #define AARCH64_X_REGS_NUM 31 | |
51 | #define AARCH64_V_REGS_NUM 32 | |
52 | #define AARCH64_X0_REGNO 0 | |
53 | #define AARCH64_SP_REGNO 31 | |
54 | #define AARCH64_PC_REGNO 32 | |
55 | #define AARCH64_CPSR_REGNO 33 | |
56 | #define AARCH64_V0_REGNO 34 | |
bf330350 CU |
57 | #define AARCH64_FPSR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM) |
58 | #define AARCH64_FPCR_REGNO (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 1) | |
176eb98c | 59 | |
bf330350 | 60 | #define AARCH64_NUM_REGS (AARCH64_V0_REGNO + AARCH64_V_REGS_NUM + 2) |
176eb98c | 61 | |
176eb98c MS |
62 | /* Per-process arch-specific data we want to keep. */ |
63 | ||
64 | struct arch_process_info | |
65 | { | |
66 | /* Hardware breakpoint/watchpoint data. | |
67 | The reason for them to be per-process rather than per-thread is | |
68 | due to the lack of information in the gdbserver environment; | |
69 | gdbserver is not told that whether a requested hardware | |
70 | breakpoint/watchpoint is thread specific or not, so it has to set | |
71 | each hw bp/wp for every thread in the current process. The | |
72 | higher level bp/wp management in gdb will resume a thread if a hw | |
73 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
74 | same for each thread, it is reasonable for the data to live here. | |
75 | */ | |
76 | struct aarch64_debug_reg_state debug_reg_state; | |
77 | }; | |
78 | ||
3b53ae99 YQ |
79 | /* Return true if the size of register 0 is 8 byte. */ |
80 | ||
81 | static int | |
82 | is_64bit_tdesc (void) | |
83 | { | |
84 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
85 | ||
86 | return register_size (regcache->tdesc, 0) == 8; | |
87 | } | |
88 | ||
421530db PL |
89 | /* Implementation of linux_target_ops method "cannot_store_register". */ |
90 | ||
176eb98c MS |
91 | static int |
92 | aarch64_cannot_store_register (int regno) | |
93 | { | |
94 | return regno >= AARCH64_NUM_REGS; | |
95 | } | |
96 | ||
421530db PL |
97 | /* Implementation of linux_target_ops method "cannot_fetch_register". */ |
98 | ||
176eb98c MS |
99 | static int |
100 | aarch64_cannot_fetch_register (int regno) | |
101 | { | |
102 | return regno >= AARCH64_NUM_REGS; | |
103 | } | |
104 | ||
105 | static void | |
106 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
107 | { | |
108 | struct user_pt_regs *regset = buf; | |
109 | int i; | |
110 | ||
111 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
112 | collect_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]); | |
113 | collect_register (regcache, AARCH64_SP_REGNO, ®set->sp); | |
114 | collect_register (regcache, AARCH64_PC_REGNO, ®set->pc); | |
115 | collect_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate); | |
116 | } | |
117 | ||
118 | static void | |
119 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
120 | { | |
121 | const struct user_pt_regs *regset = buf; | |
122 | int i; | |
123 | ||
124 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
125 | supply_register (regcache, AARCH64_X0_REGNO + i, ®set->regs[i]); | |
126 | supply_register (regcache, AARCH64_SP_REGNO, ®set->sp); | |
127 | supply_register (regcache, AARCH64_PC_REGNO, ®set->pc); | |
128 | supply_register (regcache, AARCH64_CPSR_REGNO, ®set->pstate); | |
129 | } | |
130 | ||
131 | static void | |
132 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
133 | { | |
134 | struct user_fpsimd_state *regset = buf; | |
135 | int i; | |
136 | ||
137 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
138 | collect_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]); | |
bf330350 CU |
139 | collect_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr); |
140 | collect_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr); | |
176eb98c MS |
141 | } |
142 | ||
143 | static void | |
144 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
145 | { | |
146 | const struct user_fpsimd_state *regset = buf; | |
147 | int i; | |
148 | ||
149 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
150 | supply_register (regcache, AARCH64_V0_REGNO + i, ®set->vregs[i]); | |
bf330350 CU |
151 | supply_register (regcache, AARCH64_FPSR_REGNO, ®set->fpsr); |
152 | supply_register (regcache, AARCH64_FPCR_REGNO, ®set->fpcr); | |
176eb98c MS |
153 | } |
154 | ||
176eb98c MS |
155 | /* Enable miscellaneous debugging output. The name is historical - it |
156 | was originally used to debug LinuxThreads support. */ | |
157 | extern int debug_threads; | |
158 | ||
421530db PL |
159 | /* Implementation of linux_target_ops method "get_pc". */ |
160 | ||
176eb98c MS |
161 | static CORE_ADDR |
162 | aarch64_get_pc (struct regcache *regcache) | |
163 | { | |
8a7e4587 YQ |
164 | if (register_size (regcache->tdesc, 0) == 8) |
165 | { | |
166 | unsigned long pc; | |
167 | ||
168 | collect_register_by_name (regcache, "pc", &pc); | |
169 | if (debug_threads) | |
170 | debug_printf ("stop pc is %08lx\n", pc); | |
171 | return pc; | |
172 | } | |
173 | else | |
174 | { | |
175 | unsigned int pc; | |
176 | ||
177 | collect_register_by_name (regcache, "pc", &pc); | |
178 | if (debug_threads) | |
179 | debug_printf ("stop pc is %04x\n", pc); | |
180 | return pc; | |
181 | } | |
176eb98c MS |
182 | } |
183 | ||
421530db PL |
184 | /* Implementation of linux_target_ops method "set_pc". */ |
185 | ||
176eb98c MS |
186 | static void |
187 | aarch64_set_pc (struct regcache *regcache, CORE_ADDR pc) | |
188 | { | |
8a7e4587 YQ |
189 | if (register_size (regcache->tdesc, 0) == 8) |
190 | { | |
191 | unsigned long newpc = pc; | |
192 | supply_register_by_name (regcache, "pc", &newpc); | |
193 | } | |
194 | else | |
195 | { | |
196 | unsigned int newpc = pc; | |
197 | supply_register_by_name (regcache, "pc", &newpc); | |
198 | } | |
176eb98c MS |
199 | } |
200 | ||
176eb98c MS |
201 | #define aarch64_breakpoint_len 4 |
202 | ||
37d66942 PL |
203 | /* AArch64 BRK software debug mode instruction. |
204 | This instruction needs to match gdb/aarch64-tdep.c | |
205 | (aarch64_default_breakpoint). */ | |
206 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 207 | |
421530db PL |
208 | /* Implementation of linux_target_ops method "breakpoint_at". */ |
209 | ||
176eb98c MS |
210 | static int |
211 | aarch64_breakpoint_at (CORE_ADDR where) | |
212 | { | |
37d66942 | 213 | gdb_byte insn[aarch64_breakpoint_len]; |
176eb98c | 214 | |
37d66942 PL |
215 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
216 | aarch64_breakpoint_len); | |
217 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) | |
176eb98c MS |
218 | return 1; |
219 | ||
220 | return 0; | |
221 | } | |
222 | ||
176eb98c MS |
223 | static void |
224 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
225 | { | |
226 | int i; | |
227 | ||
228 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
229 | { | |
230 | state->dr_addr_bp[i] = 0; | |
231 | state->dr_ctrl_bp[i] = 0; | |
232 | state->dr_ref_count_bp[i] = 0; | |
233 | } | |
234 | ||
235 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
236 | { | |
237 | state->dr_addr_wp[i] = 0; | |
238 | state->dr_ctrl_wp[i] = 0; | |
239 | state->dr_ref_count_wp[i] = 0; | |
240 | } | |
241 | } | |
242 | ||
176eb98c MS |
243 | /* Return the pointer to the debug register state structure in the |
244 | current process' arch-specific data area. */ | |
245 | ||
db3cb7cb | 246 | struct aarch64_debug_reg_state * |
88e2cf7e | 247 | aarch64_get_debug_reg_state (pid_t pid) |
176eb98c | 248 | { |
88e2cf7e | 249 | struct process_info *proc = find_process_pid (pid); |
176eb98c | 250 | |
fe978cb0 | 251 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
252 | } |
253 | ||
421530db PL |
254 | /* Implementation of linux_target_ops method "supports_z_point_type". */ |
255 | ||
4ff0d3d8 PA |
256 | static int |
257 | aarch64_supports_z_point_type (char z_type) | |
258 | { | |
259 | switch (z_type) | |
260 | { | |
96c97461 | 261 | case Z_PACKET_SW_BP: |
6085d6f6 YQ |
262 | { |
263 | if (!extended_protocol && is_64bit_tdesc ()) | |
264 | { | |
265 | /* Only enable Z0 packet in non-multi-arch debugging. If | |
266 | extended protocol is used, don't enable Z0 packet because | |
267 | GDBserver may attach to 32-bit process. */ | |
268 | return 1; | |
269 | } | |
270 | else | |
271 | { | |
272 | /* Disable Z0 packet so that GDBserver doesn't have to handle | |
273 | different breakpoint instructions (aarch64, arm, thumb etc) | |
274 | in multi-arch debugging. */ | |
275 | return 0; | |
276 | } | |
277 | } | |
4ff0d3d8 PA |
278 | case Z_PACKET_HW_BP: |
279 | case Z_PACKET_WRITE_WP: | |
280 | case Z_PACKET_READ_WP: | |
281 | case Z_PACKET_ACCESS_WP: | |
282 | return 1; | |
283 | default: | |
4ff0d3d8 PA |
284 | return 0; |
285 | } | |
286 | } | |
287 | ||
421530db | 288 | /* Implementation of linux_target_ops method "insert_point". |
176eb98c | 289 | |
421530db PL |
290 | It actually only records the info of the to-be-inserted bp/wp; |
291 | the actual insertion will happen when threads are resumed. */ | |
176eb98c MS |
292 | |
293 | static int | |
802e8e6d PA |
294 | aarch64_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
295 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
296 | { |
297 | int ret; | |
4ff0d3d8 | 298 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
299 | struct aarch64_debug_reg_state *state |
300 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 301 | |
c5e92cca | 302 | if (show_debug_regs) |
176eb98c MS |
303 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
304 | (unsigned long) addr, len); | |
305 | ||
802e8e6d PA |
306 | /* Determine the type from the raw breakpoint type. */ |
307 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
308 | |
309 | if (targ_type != hw_execute) | |
39edd165 YQ |
310 | { |
311 | if (aarch64_linux_region_ok_for_watchpoint (addr, len)) | |
312 | ret = aarch64_handle_watchpoint (targ_type, addr, len, | |
313 | 1 /* is_insert */, state); | |
314 | else | |
315 | ret = -1; | |
316 | } | |
176eb98c MS |
317 | else |
318 | ret = | |
c67ca4de YQ |
319 | aarch64_handle_breakpoint (targ_type, addr, len, 1 /* is_insert */, |
320 | state); | |
176eb98c | 321 | |
60a191ed | 322 | if (show_debug_regs) |
88e2cf7e YQ |
323 | aarch64_show_debug_reg_state (state, "insert_point", addr, len, |
324 | targ_type); | |
176eb98c MS |
325 | |
326 | return ret; | |
327 | } | |
328 | ||
421530db | 329 | /* Implementation of linux_target_ops method "remove_point". |
176eb98c | 330 | |
421530db PL |
331 | It actually only records the info of the to-be-removed bp/wp, |
332 | the actual removal will be done when threads are resumed. */ | |
176eb98c MS |
333 | |
334 | static int | |
802e8e6d PA |
335 | aarch64_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
336 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
337 | { |
338 | int ret; | |
4ff0d3d8 | 339 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
340 | struct aarch64_debug_reg_state *state |
341 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 342 | |
c5e92cca | 343 | if (show_debug_regs) |
176eb98c MS |
344 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
345 | (unsigned long) addr, len); | |
346 | ||
802e8e6d PA |
347 | /* Determine the type from the raw breakpoint type. */ |
348 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
349 | |
350 | /* Set up state pointers. */ | |
351 | if (targ_type != hw_execute) | |
352 | ret = | |
c67ca4de YQ |
353 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
354 | state); | |
176eb98c MS |
355 | else |
356 | ret = | |
c67ca4de YQ |
357 | aarch64_handle_breakpoint (targ_type, addr, len, 0 /* is_insert */, |
358 | state); | |
176eb98c | 359 | |
60a191ed | 360 | if (show_debug_regs) |
88e2cf7e YQ |
361 | aarch64_show_debug_reg_state (state, "remove_point", addr, len, |
362 | targ_type); | |
176eb98c MS |
363 | |
364 | return ret; | |
365 | } | |
366 | ||
421530db | 367 | /* Implementation of linux_target_ops method "stopped_data_address". */ |
176eb98c MS |
368 | |
369 | static CORE_ADDR | |
370 | aarch64_stopped_data_address (void) | |
371 | { | |
372 | siginfo_t siginfo; | |
373 | int pid, i; | |
374 | struct aarch64_debug_reg_state *state; | |
375 | ||
0bfdf32f | 376 | pid = lwpid_of (current_thread); |
176eb98c MS |
377 | |
378 | /* Get the siginfo. */ | |
379 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
380 | return (CORE_ADDR) 0; | |
381 | ||
382 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
383 | if (siginfo.si_signo != SIGTRAP | |
384 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
385 | return (CORE_ADDR) 0; | |
386 | ||
387 | /* Check if the address matches any watched address. */ | |
88e2cf7e | 388 | state = aarch64_get_debug_reg_state (pid_of (current_thread)); |
176eb98c MS |
389 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) |
390 | { | |
391 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); | |
392 | const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr; | |
393 | const CORE_ADDR addr_watch = state->dr_addr_wp[i]; | |
394 | if (state->dr_ref_count_wp[i] | |
395 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
396 | && addr_trap >= addr_watch | |
397 | && addr_trap < addr_watch + len) | |
398 | return addr_trap; | |
399 | } | |
400 | ||
401 | return (CORE_ADDR) 0; | |
402 | } | |
403 | ||
421530db | 404 | /* Implementation of linux_target_ops method "stopped_by_watchpoint". */ |
176eb98c MS |
405 | |
406 | static int | |
407 | aarch64_stopped_by_watchpoint (void) | |
408 | { | |
409 | if (aarch64_stopped_data_address () != 0) | |
410 | return 1; | |
411 | else | |
412 | return 0; | |
413 | } | |
414 | ||
415 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
416 | ||
417 | ps_err_e | |
55fac6e0 | 418 | ps_get_thread_area (const struct ps_prochandle *ph, |
176eb98c MS |
419 | lwpid_t lwpid, int idx, void **base) |
420 | { | |
a0cc84cd YQ |
421 | return aarch64_ps_get_thread_area (ph, lwpid, idx, base, |
422 | is_64bit_tdesc ()); | |
176eb98c MS |
423 | } |
424 | ||
ade90bde YQ |
425 | /* Implementation of linux_target_ops method "siginfo_fixup". */ |
426 | ||
427 | static int | |
428 | aarch64_linux_siginfo_fixup (siginfo_t *native, void *inf, int direction) | |
429 | { | |
430 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ | |
431 | if (!is_64bit_tdesc ()) | |
432 | { | |
433 | if (direction == 0) | |
434 | aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, | |
435 | native); | |
436 | else | |
437 | aarch64_siginfo_from_compat_siginfo (native, | |
438 | (struct compat_siginfo *) inf); | |
439 | ||
440 | return 1; | |
441 | } | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
421530db | 446 | /* Implementation of linux_target_ops method "linux_new_process". */ |
176eb98c MS |
447 | |
448 | static struct arch_process_info * | |
449 | aarch64_linux_new_process (void) | |
450 | { | |
8d749320 | 451 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
176eb98c MS |
452 | |
453 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
454 | ||
455 | return info; | |
456 | } | |
457 | ||
421530db PL |
458 | /* Implementation of linux_target_ops method "linux_new_fork". */ |
459 | ||
3a8a0396 DB |
460 | static void |
461 | aarch64_linux_new_fork (struct process_info *parent, | |
462 | struct process_info *child) | |
463 | { | |
464 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
465 | gdb_assert (parent->priv != NULL |
466 | && parent->priv->arch_private != NULL); | |
467 | gdb_assert (child->priv != NULL | |
468 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
469 | |
470 | /* Linux kernel before 2.6.33 commit | |
471 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
472 | will inherit hardware debug registers from parent | |
473 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
474 | zeroed debug registers. | |
475 | ||
476 | GDB core assumes the child inherits the watchpoints/hw | |
477 | breakpoints of the parent, and will remove them all from the | |
478 | forked off process. Copy the debug registers mirrors into the | |
479 | new process so that all breakpoints and watchpoints can be | |
480 | removed together. The debug registers mirror will become zeroed | |
481 | in the end before detaching the forked off process, thus making | |
482 | this compatible with older Linux kernels too. */ | |
483 | ||
61a7418c | 484 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
485 | } |
486 | ||
3b53ae99 YQ |
487 | /* Return the right target description according to the ELF file of |
488 | current thread. */ | |
489 | ||
490 | static const struct target_desc * | |
491 | aarch64_linux_read_description (void) | |
492 | { | |
493 | unsigned int machine; | |
494 | int is_elf64; | |
495 | int tid; | |
496 | ||
497 | tid = lwpid_of (current_thread); | |
498 | ||
499 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
500 | ||
501 | if (is_elf64) | |
502 | return tdesc_aarch64; | |
503 | else | |
504 | return tdesc_arm_with_neon; | |
505 | } | |
506 | ||
421530db PL |
507 | /* Implementation of linux_target_ops method "arch_setup". */ |
508 | ||
176eb98c MS |
509 | static void |
510 | aarch64_arch_setup (void) | |
511 | { | |
3b53ae99 | 512 | current_process ()->tdesc = aarch64_linux_read_description (); |
176eb98c | 513 | |
af1b22f3 | 514 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
515 | } |
516 | ||
3aee8918 | 517 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
518 | { |
519 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
520 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
521 | aarch64_fill_gregset, aarch64_store_gregset }, | |
522 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
523 | sizeof (struct user_fpsimd_state), FP_REGS, | |
524 | aarch64_fill_fpregset, aarch64_store_fpregset | |
525 | }, | |
526 | { 0, 0, 0, -1, -1, NULL, NULL } | |
527 | }; | |
528 | ||
3aee8918 PA |
529 | static struct regsets_info aarch64_regsets_info = |
530 | { | |
531 | aarch64_regsets, /* regsets */ | |
532 | 0, /* num_regsets */ | |
533 | NULL, /* disabled_regsets */ | |
534 | }; | |
535 | ||
3b53ae99 | 536 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
537 | { |
538 | NULL, /* regset_bitmap */ | |
c2d65f38 | 539 | NULL, /* usrregs */ |
3aee8918 PA |
540 | &aarch64_regsets_info, |
541 | }; | |
542 | ||
421530db PL |
543 | /* Implementation of linux_target_ops method "regs_info". */ |
544 | ||
3aee8918 PA |
545 | static const struct regs_info * |
546 | aarch64_regs_info (void) | |
547 | { | |
3b53ae99 YQ |
548 | if (is_64bit_tdesc ()) |
549 | return ®s_info_aarch64; | |
550 | else | |
551 | return ®s_info_aarch32; | |
3aee8918 PA |
552 | } |
553 | ||
7671bf47 PL |
554 | /* Implementation of linux_target_ops method "supports_tracepoints". */ |
555 | ||
556 | static int | |
557 | aarch64_supports_tracepoints (void) | |
558 | { | |
524b57e6 YQ |
559 | if (current_thread == NULL) |
560 | return 1; | |
561 | else | |
562 | { | |
563 | /* We don't support tracepoints on aarch32 now. */ | |
564 | return is_64bit_tdesc (); | |
565 | } | |
7671bf47 PL |
566 | } |
567 | ||
bb903df0 PL |
568 | /* Implementation of linux_target_ops method "get_thread_area". */ |
569 | ||
570 | static int | |
571 | aarch64_get_thread_area (int lwpid, CORE_ADDR *addrp) | |
572 | { | |
573 | struct iovec iovec; | |
574 | uint64_t reg; | |
575 | ||
576 | iovec.iov_base = ® | |
577 | iovec.iov_len = sizeof (reg); | |
578 | ||
579 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
580 | return -1; | |
581 | ||
582 | *addrp = reg; | |
583 | ||
584 | return 0; | |
585 | } | |
586 | ||
afbe19f8 PL |
587 | /* List of condition codes that we need. */ |
588 | ||
589 | enum aarch64_condition_codes | |
590 | { | |
591 | EQ = 0x0, | |
592 | NE = 0x1, | |
593 | LO = 0x3, | |
594 | GE = 0xa, | |
595 | LT = 0xb, | |
596 | GT = 0xc, | |
597 | LE = 0xd, | |
bb903df0 PL |
598 | }; |
599 | ||
bb903df0 PL |
600 | /* Representation of an operand. At this time, it only supports register |
601 | and immediate types. */ | |
602 | ||
603 | struct aarch64_operand | |
604 | { | |
605 | /* Type of the operand. */ | |
606 | enum | |
607 | { | |
608 | OPERAND_IMMEDIATE, | |
609 | OPERAND_REGISTER, | |
610 | } type; | |
611 | /* Value of the operand according to the type. */ | |
612 | union | |
613 | { | |
614 | uint32_t imm; | |
615 | struct aarch64_register reg; | |
616 | }; | |
617 | }; | |
618 | ||
619 | /* List of registers that we are currently using, we can add more here as | |
620 | we need to use them. */ | |
621 | ||
622 | /* General purpose scratch registers (64 bit). */ | |
623 | static const struct aarch64_register x0 = { 0, 1 }; | |
624 | static const struct aarch64_register x1 = { 1, 1 }; | |
625 | static const struct aarch64_register x2 = { 2, 1 }; | |
626 | static const struct aarch64_register x3 = { 3, 1 }; | |
627 | static const struct aarch64_register x4 = { 4, 1 }; | |
628 | ||
629 | /* General purpose scratch registers (32 bit). */ | |
afbe19f8 | 630 | static const struct aarch64_register w0 = { 0, 0 }; |
bb903df0 PL |
631 | static const struct aarch64_register w2 = { 2, 0 }; |
632 | ||
633 | /* Intra-procedure scratch registers. */ | |
634 | static const struct aarch64_register ip0 = { 16, 1 }; | |
635 | ||
636 | /* Special purpose registers. */ | |
afbe19f8 PL |
637 | static const struct aarch64_register fp = { 29, 1 }; |
638 | static const struct aarch64_register lr = { 30, 1 }; | |
bb903df0 PL |
639 | static const struct aarch64_register sp = { 31, 1 }; |
640 | static const struct aarch64_register xzr = { 31, 1 }; | |
641 | ||
642 | /* Dynamically allocate a new register. If we know the register | |
643 | statically, we should make it a global as above instead of using this | |
644 | helper function. */ | |
645 | ||
646 | static struct aarch64_register | |
647 | aarch64_register (unsigned num, int is64) | |
648 | { | |
649 | return (struct aarch64_register) { num, is64 }; | |
650 | } | |
651 | ||
652 | /* Helper function to create a register operand, for instructions with | |
653 | different types of operands. | |
654 | ||
655 | For example: | |
656 | p += emit_mov (p, x0, register_operand (x1)); */ | |
657 | ||
658 | static struct aarch64_operand | |
659 | register_operand (struct aarch64_register reg) | |
660 | { | |
661 | struct aarch64_operand operand; | |
662 | ||
663 | operand.type = OPERAND_REGISTER; | |
664 | operand.reg = reg; | |
665 | ||
666 | return operand; | |
667 | } | |
668 | ||
669 | /* Helper function to create an immediate operand, for instructions with | |
670 | different types of operands. | |
671 | ||
672 | For example: | |
673 | p += emit_mov (p, x0, immediate_operand (12)); */ | |
674 | ||
675 | static struct aarch64_operand | |
676 | immediate_operand (uint32_t imm) | |
677 | { | |
678 | struct aarch64_operand operand; | |
679 | ||
680 | operand.type = OPERAND_IMMEDIATE; | |
681 | operand.imm = imm; | |
682 | ||
683 | return operand; | |
684 | } | |
685 | ||
bb903df0 PL |
686 | /* Helper function to create an offset memory operand. |
687 | ||
688 | For example: | |
689 | p += emit_ldr (p, x0, sp, offset_memory_operand (16)); */ | |
690 | ||
691 | static struct aarch64_memory_operand | |
692 | offset_memory_operand (int32_t offset) | |
693 | { | |
694 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_OFFSET, offset }; | |
695 | } | |
696 | ||
697 | /* Helper function to create a pre-index memory operand. | |
698 | ||
699 | For example: | |
700 | p += emit_ldr (p, x0, sp, preindex_memory_operand (16)); */ | |
701 | ||
702 | static struct aarch64_memory_operand | |
703 | preindex_memory_operand (int32_t index) | |
704 | { | |
705 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_PREINDEX, index }; | |
706 | } | |
707 | ||
afbe19f8 PL |
708 | /* Helper function to create a post-index memory operand. |
709 | ||
710 | For example: | |
711 | p += emit_ldr (p, x0, sp, postindex_memory_operand (16)); */ | |
712 | ||
713 | static struct aarch64_memory_operand | |
714 | postindex_memory_operand (int32_t index) | |
715 | { | |
716 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_POSTINDEX, index }; | |
717 | } | |
718 | ||
bb903df0 PL |
719 | /* System control registers. These special registers can be written and |
720 | read with the MRS and MSR instructions. | |
721 | ||
722 | - NZCV: Condition flags. GDB refers to this register under the CPSR | |
723 | name. | |
724 | - FPSR: Floating-point status register. | |
725 | - FPCR: Floating-point control registers. | |
726 | - TPIDR_EL0: Software thread ID register. */ | |
727 | ||
728 | enum aarch64_system_control_registers | |
729 | { | |
730 | /* op0 op1 crn crm op2 */ | |
731 | NZCV = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x2 << 3) | 0x0, | |
732 | FPSR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x1, | |
733 | FPCR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x0, | |
734 | TPIDR_EL0 = (0x1 << 14) | (0x3 << 11) | (0xd << 7) | (0x0 << 3) | 0x2 | |
735 | }; | |
736 | ||
bb903df0 PL |
737 | /* Write a BLR instruction into *BUF. |
738 | ||
739 | BLR rn | |
740 | ||
741 | RN is the register to branch to. */ | |
742 | ||
743 | static int | |
744 | emit_blr (uint32_t *buf, struct aarch64_register rn) | |
745 | { | |
746 | return emit_insn (buf, BLR | ENCODE (rn.num, 5, 5)); | |
747 | } | |
748 | ||
afbe19f8 | 749 | /* Write a RET instruction into *BUF. |
bb903df0 | 750 | |
afbe19f8 | 751 | RET xn |
bb903df0 | 752 | |
afbe19f8 | 753 | RN is the register to branch to. */ |
bb903df0 PL |
754 | |
755 | static int | |
afbe19f8 PL |
756 | emit_ret (uint32_t *buf, struct aarch64_register rn) |
757 | { | |
758 | return emit_insn (buf, RET | ENCODE (rn.num, 5, 5)); | |
759 | } | |
760 | ||
761 | static int | |
762 | emit_load_store_pair (uint32_t *buf, enum aarch64_opcodes opcode, | |
763 | struct aarch64_register rt, | |
764 | struct aarch64_register rt2, | |
765 | struct aarch64_register rn, | |
766 | struct aarch64_memory_operand operand) | |
bb903df0 PL |
767 | { |
768 | uint32_t opc; | |
769 | uint32_t pre_index; | |
770 | uint32_t write_back; | |
771 | ||
772 | if (rt.is64) | |
773 | opc = ENCODE (2, 2, 30); | |
774 | else | |
775 | opc = ENCODE (0, 2, 30); | |
776 | ||
777 | switch (operand.type) | |
778 | { | |
779 | case MEMORY_OPERAND_OFFSET: | |
780 | { | |
781 | pre_index = ENCODE (1, 1, 24); | |
782 | write_back = ENCODE (0, 1, 23); | |
783 | break; | |
784 | } | |
afbe19f8 PL |
785 | case MEMORY_OPERAND_POSTINDEX: |
786 | { | |
787 | pre_index = ENCODE (0, 1, 24); | |
788 | write_back = ENCODE (1, 1, 23); | |
789 | break; | |
790 | } | |
bb903df0 PL |
791 | case MEMORY_OPERAND_PREINDEX: |
792 | { | |
793 | pre_index = ENCODE (1, 1, 24); | |
794 | write_back = ENCODE (1, 1, 23); | |
795 | break; | |
796 | } | |
797 | default: | |
798 | return 0; | |
799 | } | |
800 | ||
afbe19f8 | 801 | return emit_insn (buf, opcode | opc | pre_index | write_back |
7781c06f YQ |
802 | | ENCODE (operand.index >> 3, 7, 15) |
803 | | ENCODE (rt2.num, 5, 10) | |
bb903df0 PL |
804 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); |
805 | } | |
806 | ||
afbe19f8 PL |
807 | /* Write a STP instruction into *BUF. |
808 | ||
809 | STP rt, rt2, [rn, #offset] | |
810 | STP rt, rt2, [rn, #index]! | |
811 | STP rt, rt2, [rn], #index | |
812 | ||
813 | RT and RT2 are the registers to store. | |
814 | RN is the base address register. | |
815 | OFFSET is the immediate to add to the base address. It is limited to a | |
816 | -512 .. 504 range (7 bits << 3). */ | |
817 | ||
818 | static int | |
819 | emit_stp (uint32_t *buf, struct aarch64_register rt, | |
820 | struct aarch64_register rt2, struct aarch64_register rn, | |
821 | struct aarch64_memory_operand operand) | |
822 | { | |
823 | return emit_load_store_pair (buf, STP, rt, rt2, rn, operand); | |
824 | } | |
825 | ||
826 | /* Write a LDP instruction into *BUF. | |
827 | ||
828 | LDP rt, rt2, [rn, #offset] | |
829 | LDP rt, rt2, [rn, #index]! | |
830 | LDP rt, rt2, [rn], #index | |
831 | ||
832 | RT and RT2 are the registers to store. | |
833 | RN is the base address register. | |
834 | OFFSET is the immediate to add to the base address. It is limited to a | |
835 | -512 .. 504 range (7 bits << 3). */ | |
836 | ||
837 | static int | |
838 | emit_ldp (uint32_t *buf, struct aarch64_register rt, | |
839 | struct aarch64_register rt2, struct aarch64_register rn, | |
840 | struct aarch64_memory_operand operand) | |
841 | { | |
842 | return emit_load_store_pair (buf, LDP, rt, rt2, rn, operand); | |
843 | } | |
844 | ||
bb903df0 PL |
845 | /* Write a LDP (SIMD&VFP) instruction using Q registers into *BUF. |
846 | ||
847 | LDP qt, qt2, [rn, #offset] | |
848 | ||
849 | RT and RT2 are the Q registers to store. | |
850 | RN is the base address register. | |
851 | OFFSET is the immediate to add to the base address. It is limited to | |
852 | -1024 .. 1008 range (7 bits << 4). */ | |
853 | ||
854 | static int | |
855 | emit_ldp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
856 | struct aarch64_register rn, int32_t offset) | |
857 | { | |
858 | uint32_t opc = ENCODE (2, 2, 30); | |
859 | uint32_t pre_index = ENCODE (1, 1, 24); | |
860 | ||
861 | return emit_insn (buf, LDP_SIMD_VFP | opc | pre_index | |
862 | | ENCODE (offset >> 4, 7, 15) | ENCODE (rt2, 5, 10) | |
863 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
864 | } | |
865 | ||
866 | /* Write a STP (SIMD&VFP) instruction using Q registers into *BUF. | |
867 | ||
868 | STP qt, qt2, [rn, #offset] | |
869 | ||
870 | RT and RT2 are the Q registers to store. | |
871 | RN is the base address register. | |
872 | OFFSET is the immediate to add to the base address. It is limited to | |
873 | -1024 .. 1008 range (7 bits << 4). */ | |
874 | ||
875 | static int | |
876 | emit_stp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
877 | struct aarch64_register rn, int32_t offset) | |
878 | { | |
879 | uint32_t opc = ENCODE (2, 2, 30); | |
880 | uint32_t pre_index = ENCODE (1, 1, 24); | |
881 | ||
882 | return emit_insn (buf, STP_SIMD_VFP | opc | pre_index | |
b6542f81 YQ |
883 | | ENCODE (offset >> 4, 7, 15) |
884 | | ENCODE (rt2, 5, 10) | |
885 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
886 | } |
887 | ||
afbe19f8 PL |
888 | /* Write a LDRH instruction into *BUF. |
889 | ||
890 | LDRH wt, [xn, #offset] | |
891 | LDRH wt, [xn, #index]! | |
892 | LDRH wt, [xn], #index | |
893 | ||
894 | RT is the register to store. | |
895 | RN is the base address register. | |
896 | OFFSET is the immediate to add to the base address. It is limited to | |
897 | 0 .. 32760 range (12 bits << 3). */ | |
898 | ||
899 | static int | |
900 | emit_ldrh (uint32_t *buf, struct aarch64_register rt, | |
901 | struct aarch64_register rn, | |
902 | struct aarch64_memory_operand operand) | |
903 | { | |
904 | return emit_load_store (buf, 1, LDR, rt, rn, operand); | |
905 | } | |
906 | ||
907 | /* Write a LDRB instruction into *BUF. | |
908 | ||
909 | LDRB wt, [xn, #offset] | |
910 | LDRB wt, [xn, #index]! | |
911 | LDRB wt, [xn], #index | |
912 | ||
913 | RT is the register to store. | |
914 | RN is the base address register. | |
915 | OFFSET is the immediate to add to the base address. It is limited to | |
916 | 0 .. 32760 range (12 bits << 3). */ | |
917 | ||
918 | static int | |
919 | emit_ldrb (uint32_t *buf, struct aarch64_register rt, | |
920 | struct aarch64_register rn, | |
921 | struct aarch64_memory_operand operand) | |
922 | { | |
923 | return emit_load_store (buf, 0, LDR, rt, rn, operand); | |
924 | } | |
925 | ||
bb903df0 | 926 | |
bb903df0 PL |
927 | |
928 | /* Write a STR instruction into *BUF. | |
929 | ||
930 | STR rt, [rn, #offset] | |
931 | STR rt, [rn, #index]! | |
afbe19f8 | 932 | STR rt, [rn], #index |
bb903df0 PL |
933 | |
934 | RT is the register to store. | |
935 | RN is the base address register. | |
936 | OFFSET is the immediate to add to the base address. It is limited to | |
937 | 0 .. 32760 range (12 bits << 3). */ | |
938 | ||
939 | static int | |
940 | emit_str (uint32_t *buf, struct aarch64_register rt, | |
941 | struct aarch64_register rn, | |
942 | struct aarch64_memory_operand operand) | |
943 | { | |
944 | return emit_load_store (buf, rt.is64 ? 3 : 2, STR, rt, rn, operand); | |
945 | } | |
946 | ||
947 | /* Helper function emitting an exclusive load or store instruction. */ | |
948 | ||
949 | static int | |
950 | emit_load_store_exclusive (uint32_t *buf, uint32_t size, | |
951 | enum aarch64_opcodes opcode, | |
952 | struct aarch64_register rs, | |
953 | struct aarch64_register rt, | |
954 | struct aarch64_register rt2, | |
955 | struct aarch64_register rn) | |
956 | { | |
957 | return emit_insn (buf, opcode | ENCODE (size, 2, 30) | |
958 | | ENCODE (rs.num, 5, 16) | ENCODE (rt2.num, 5, 10) | |
959 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
960 | } | |
961 | ||
962 | /* Write a LAXR instruction into *BUF. | |
963 | ||
964 | LDAXR rt, [xn] | |
965 | ||
966 | RT is the destination register. | |
967 | RN is the base address register. */ | |
968 | ||
969 | static int | |
970 | emit_ldaxr (uint32_t *buf, struct aarch64_register rt, | |
971 | struct aarch64_register rn) | |
972 | { | |
973 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, LDAXR, xzr, rt, | |
974 | xzr, rn); | |
975 | } | |
976 | ||
977 | /* Write a STXR instruction into *BUF. | |
978 | ||
979 | STXR ws, rt, [xn] | |
980 | ||
981 | RS is the result register, it indicates if the store succeeded or not. | |
982 | RT is the destination register. | |
983 | RN is the base address register. */ | |
984 | ||
985 | static int | |
986 | emit_stxr (uint32_t *buf, struct aarch64_register rs, | |
987 | struct aarch64_register rt, struct aarch64_register rn) | |
988 | { | |
989 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STXR, rs, rt, | |
990 | xzr, rn); | |
991 | } | |
992 | ||
993 | /* Write a STLR instruction into *BUF. | |
994 | ||
995 | STLR rt, [xn] | |
996 | ||
997 | RT is the register to store. | |
998 | RN is the base address register. */ | |
999 | ||
1000 | static int | |
1001 | emit_stlr (uint32_t *buf, struct aarch64_register rt, | |
1002 | struct aarch64_register rn) | |
1003 | { | |
1004 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STLR, xzr, rt, | |
1005 | xzr, rn); | |
1006 | } | |
1007 | ||
1008 | /* Helper function for data processing instructions with register sources. */ | |
1009 | ||
1010 | static int | |
1011 | emit_data_processing_reg (uint32_t *buf, enum aarch64_opcodes opcode, | |
1012 | struct aarch64_register rd, | |
1013 | struct aarch64_register rn, | |
1014 | struct aarch64_register rm) | |
1015 | { | |
1016 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1017 | ||
1018 | return emit_insn (buf, opcode | size | ENCODE (rm.num, 5, 16) | |
1019 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
1020 | } | |
1021 | ||
1022 | /* Helper function for data processing instructions taking either a register | |
1023 | or an immediate. */ | |
1024 | ||
1025 | static int | |
1026 | emit_data_processing (uint32_t *buf, enum aarch64_opcodes opcode, | |
1027 | struct aarch64_register rd, | |
1028 | struct aarch64_register rn, | |
1029 | struct aarch64_operand operand) | |
1030 | { | |
1031 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1032 | /* The opcode is different for register and immediate source operands. */ | |
1033 | uint32_t operand_opcode; | |
1034 | ||
1035 | if (operand.type == OPERAND_IMMEDIATE) | |
1036 | { | |
1037 | /* xxx1 000x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1038 | operand_opcode = ENCODE (8, 4, 25); | |
1039 | ||
1040 | return emit_insn (buf, opcode | operand_opcode | size | |
1041 | | ENCODE (operand.imm, 12, 10) | |
1042 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
1043 | } | |
1044 | else | |
1045 | { | |
1046 | /* xxx0 101x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1047 | operand_opcode = ENCODE (5, 4, 25); | |
1048 | ||
1049 | return emit_data_processing_reg (buf, opcode | operand_opcode, rd, | |
1050 | rn, operand.reg); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | /* Write an ADD instruction into *BUF. | |
1055 | ||
1056 | ADD rd, rn, #imm | |
1057 | ADD rd, rn, rm | |
1058 | ||
1059 | This function handles both an immediate and register add. | |
1060 | ||
1061 | RD is the destination register. | |
1062 | RN is the input register. | |
1063 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1064 | OPERAND_REGISTER. */ | |
1065 | ||
1066 | static int | |
1067 | emit_add (uint32_t *buf, struct aarch64_register rd, | |
1068 | struct aarch64_register rn, struct aarch64_operand operand) | |
1069 | { | |
1070 | return emit_data_processing (buf, ADD, rd, rn, operand); | |
1071 | } | |
1072 | ||
1073 | /* Write a SUB instruction into *BUF. | |
1074 | ||
1075 | SUB rd, rn, #imm | |
1076 | SUB rd, rn, rm | |
1077 | ||
1078 | This function handles both an immediate and register sub. | |
1079 | ||
1080 | RD is the destination register. | |
1081 | RN is the input register. | |
1082 | IMM is the immediate to substract to RN. */ | |
1083 | ||
1084 | static int | |
1085 | emit_sub (uint32_t *buf, struct aarch64_register rd, | |
1086 | struct aarch64_register rn, struct aarch64_operand operand) | |
1087 | { | |
1088 | return emit_data_processing (buf, SUB, rd, rn, operand); | |
1089 | } | |
1090 | ||
1091 | /* Write a MOV instruction into *BUF. | |
1092 | ||
1093 | MOV rd, #imm | |
1094 | MOV rd, rm | |
1095 | ||
1096 | This function handles both a wide immediate move and a register move, | |
1097 | with the condition that the source register is not xzr. xzr and the | |
1098 | stack pointer share the same encoding and this function only supports | |
1099 | the stack pointer. | |
1100 | ||
1101 | RD is the destination register. | |
1102 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1103 | OPERAND_REGISTER. */ | |
1104 | ||
1105 | static int | |
1106 | emit_mov (uint32_t *buf, struct aarch64_register rd, | |
1107 | struct aarch64_operand operand) | |
1108 | { | |
1109 | if (operand.type == OPERAND_IMMEDIATE) | |
1110 | { | |
1111 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1112 | /* Do not shift the immediate. */ | |
1113 | uint32_t shift = ENCODE (0, 2, 21); | |
1114 | ||
1115 | return emit_insn (buf, MOV | size | shift | |
1116 | | ENCODE (operand.imm, 16, 5) | |
1117 | | ENCODE (rd.num, 5, 0)); | |
1118 | } | |
1119 | else | |
1120 | return emit_add (buf, rd, operand.reg, immediate_operand (0)); | |
1121 | } | |
1122 | ||
1123 | /* Write a MOVK instruction into *BUF. | |
1124 | ||
1125 | MOVK rd, #imm, lsl #shift | |
1126 | ||
1127 | RD is the destination register. | |
1128 | IMM is the immediate. | |
1129 | SHIFT is the logical shift left to apply to IMM. */ | |
1130 | ||
1131 | static int | |
7781c06f YQ |
1132 | emit_movk (uint32_t *buf, struct aarch64_register rd, uint32_t imm, |
1133 | unsigned shift) | |
bb903df0 PL |
1134 | { |
1135 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1136 | ||
1137 | return emit_insn (buf, MOVK | size | ENCODE (shift, 2, 21) | | |
1138 | ENCODE (imm, 16, 5) | ENCODE (rd.num, 5, 0)); | |
1139 | } | |
1140 | ||
1141 | /* Write instructions into *BUF in order to move ADDR into a register. | |
1142 | ADDR can be a 64-bit value. | |
1143 | ||
1144 | This function will emit a series of MOV and MOVK instructions, such as: | |
1145 | ||
1146 | MOV xd, #(addr) | |
1147 | MOVK xd, #(addr >> 16), lsl #16 | |
1148 | MOVK xd, #(addr >> 32), lsl #32 | |
1149 | MOVK xd, #(addr >> 48), lsl #48 */ | |
1150 | ||
1151 | static int | |
1152 | emit_mov_addr (uint32_t *buf, struct aarch64_register rd, CORE_ADDR addr) | |
1153 | { | |
1154 | uint32_t *p = buf; | |
1155 | ||
1156 | /* The MOV (wide immediate) instruction clears to top bits of the | |
1157 | register. */ | |
1158 | p += emit_mov (p, rd, immediate_operand (addr & 0xffff)); | |
1159 | ||
1160 | if ((addr >> 16) != 0) | |
1161 | p += emit_movk (p, rd, (addr >> 16) & 0xffff, 1); | |
1162 | else | |
1163 | return p - buf; | |
1164 | ||
1165 | if ((addr >> 32) != 0) | |
1166 | p += emit_movk (p, rd, (addr >> 32) & 0xffff, 2); | |
1167 | else | |
1168 | return p - buf; | |
1169 | ||
1170 | if ((addr >> 48) != 0) | |
1171 | p += emit_movk (p, rd, (addr >> 48) & 0xffff, 3); | |
1172 | ||
1173 | return p - buf; | |
1174 | } | |
1175 | ||
afbe19f8 PL |
1176 | /* Write a SUBS instruction into *BUF. |
1177 | ||
1178 | SUBS rd, rn, rm | |
1179 | ||
1180 | This instruction update the condition flags. | |
1181 | ||
1182 | RD is the destination register. | |
1183 | RN and RM are the source registers. */ | |
1184 | ||
1185 | static int | |
1186 | emit_subs (uint32_t *buf, struct aarch64_register rd, | |
1187 | struct aarch64_register rn, struct aarch64_operand operand) | |
1188 | { | |
1189 | return emit_data_processing (buf, SUBS, rd, rn, operand); | |
1190 | } | |
1191 | ||
1192 | /* Write a CMP instruction into *BUF. | |
1193 | ||
1194 | CMP rn, rm | |
1195 | ||
1196 | This instruction is an alias of SUBS xzr, rn, rm. | |
1197 | ||
1198 | RN and RM are the registers to compare. */ | |
1199 | ||
1200 | static int | |
1201 | emit_cmp (uint32_t *buf, struct aarch64_register rn, | |
1202 | struct aarch64_operand operand) | |
1203 | { | |
1204 | return emit_subs (buf, xzr, rn, operand); | |
1205 | } | |
1206 | ||
1207 | /* Write a AND instruction into *BUF. | |
1208 | ||
1209 | AND rd, rn, rm | |
1210 | ||
1211 | RD is the destination register. | |
1212 | RN and RM are the source registers. */ | |
1213 | ||
1214 | static int | |
1215 | emit_and (uint32_t *buf, struct aarch64_register rd, | |
1216 | struct aarch64_register rn, struct aarch64_register rm) | |
1217 | { | |
1218 | return emit_data_processing_reg (buf, AND, rd, rn, rm); | |
1219 | } | |
1220 | ||
1221 | /* Write a ORR instruction into *BUF. | |
1222 | ||
1223 | ORR rd, rn, rm | |
1224 | ||
1225 | RD is the destination register. | |
1226 | RN and RM are the source registers. */ | |
1227 | ||
1228 | static int | |
1229 | emit_orr (uint32_t *buf, struct aarch64_register rd, | |
1230 | struct aarch64_register rn, struct aarch64_register rm) | |
1231 | { | |
1232 | return emit_data_processing_reg (buf, ORR, rd, rn, rm); | |
1233 | } | |
1234 | ||
1235 | /* Write a ORN instruction into *BUF. | |
1236 | ||
1237 | ORN rd, rn, rm | |
1238 | ||
1239 | RD is the destination register. | |
1240 | RN and RM are the source registers. */ | |
1241 | ||
1242 | static int | |
1243 | emit_orn (uint32_t *buf, struct aarch64_register rd, | |
1244 | struct aarch64_register rn, struct aarch64_register rm) | |
1245 | { | |
1246 | return emit_data_processing_reg (buf, ORN, rd, rn, rm); | |
1247 | } | |
1248 | ||
1249 | /* Write a EOR instruction into *BUF. | |
1250 | ||
1251 | EOR rd, rn, rm | |
1252 | ||
1253 | RD is the destination register. | |
1254 | RN and RM are the source registers. */ | |
1255 | ||
1256 | static int | |
1257 | emit_eor (uint32_t *buf, struct aarch64_register rd, | |
1258 | struct aarch64_register rn, struct aarch64_register rm) | |
1259 | { | |
1260 | return emit_data_processing_reg (buf, EOR, rd, rn, rm); | |
1261 | } | |
1262 | ||
1263 | /* Write a MVN instruction into *BUF. | |
1264 | ||
1265 | MVN rd, rm | |
1266 | ||
1267 | This is an alias for ORN rd, xzr, rm. | |
1268 | ||
1269 | RD is the destination register. | |
1270 | RM is the source register. */ | |
1271 | ||
1272 | static int | |
1273 | emit_mvn (uint32_t *buf, struct aarch64_register rd, | |
1274 | struct aarch64_register rm) | |
1275 | { | |
1276 | return emit_orn (buf, rd, xzr, rm); | |
1277 | } | |
1278 | ||
1279 | /* Write a LSLV instruction into *BUF. | |
1280 | ||
1281 | LSLV rd, rn, rm | |
1282 | ||
1283 | RD is the destination register. | |
1284 | RN and RM are the source registers. */ | |
1285 | ||
1286 | static int | |
1287 | emit_lslv (uint32_t *buf, struct aarch64_register rd, | |
1288 | struct aarch64_register rn, struct aarch64_register rm) | |
1289 | { | |
1290 | return emit_data_processing_reg (buf, LSLV, rd, rn, rm); | |
1291 | } | |
1292 | ||
1293 | /* Write a LSRV instruction into *BUF. | |
1294 | ||
1295 | LSRV rd, rn, rm | |
1296 | ||
1297 | RD is the destination register. | |
1298 | RN and RM are the source registers. */ | |
1299 | ||
1300 | static int | |
1301 | emit_lsrv (uint32_t *buf, struct aarch64_register rd, | |
1302 | struct aarch64_register rn, struct aarch64_register rm) | |
1303 | { | |
1304 | return emit_data_processing_reg (buf, LSRV, rd, rn, rm); | |
1305 | } | |
1306 | ||
1307 | /* Write a ASRV instruction into *BUF. | |
1308 | ||
1309 | ASRV rd, rn, rm | |
1310 | ||
1311 | RD is the destination register. | |
1312 | RN and RM are the source registers. */ | |
1313 | ||
1314 | static int | |
1315 | emit_asrv (uint32_t *buf, struct aarch64_register rd, | |
1316 | struct aarch64_register rn, struct aarch64_register rm) | |
1317 | { | |
1318 | return emit_data_processing_reg (buf, ASRV, rd, rn, rm); | |
1319 | } | |
1320 | ||
1321 | /* Write a MUL instruction into *BUF. | |
1322 | ||
1323 | MUL rd, rn, rm | |
1324 | ||
1325 | RD is the destination register. | |
1326 | RN and RM are the source registers. */ | |
1327 | ||
1328 | static int | |
1329 | emit_mul (uint32_t *buf, struct aarch64_register rd, | |
1330 | struct aarch64_register rn, struct aarch64_register rm) | |
1331 | { | |
1332 | return emit_data_processing_reg (buf, MUL, rd, rn, rm); | |
1333 | } | |
1334 | ||
bb903df0 PL |
1335 | /* Write a MRS instruction into *BUF. The register size is 64-bit. |
1336 | ||
1337 | MRS xt, system_reg | |
1338 | ||
1339 | RT is the destination register. | |
1340 | SYSTEM_REG is special purpose register to read. */ | |
1341 | ||
1342 | static int | |
1343 | emit_mrs (uint32_t *buf, struct aarch64_register rt, | |
1344 | enum aarch64_system_control_registers system_reg) | |
1345 | { | |
1346 | return emit_insn (buf, MRS | ENCODE (system_reg, 15, 5) | |
1347 | | ENCODE (rt.num, 5, 0)); | |
1348 | } | |
1349 | ||
1350 | /* Write a MSR instruction into *BUF. The register size is 64-bit. | |
1351 | ||
1352 | MSR system_reg, xt | |
1353 | ||
1354 | SYSTEM_REG is special purpose register to write. | |
1355 | RT is the input register. */ | |
1356 | ||
1357 | static int | |
1358 | emit_msr (uint32_t *buf, enum aarch64_system_control_registers system_reg, | |
1359 | struct aarch64_register rt) | |
1360 | { | |
1361 | return emit_insn (buf, MSR | ENCODE (system_reg, 15, 5) | |
1362 | | ENCODE (rt.num, 5, 0)); | |
1363 | } | |
1364 | ||
1365 | /* Write a SEVL instruction into *BUF. | |
1366 | ||
1367 | This is a hint instruction telling the hardware to trigger an event. */ | |
1368 | ||
1369 | static int | |
1370 | emit_sevl (uint32_t *buf) | |
1371 | { | |
1372 | return emit_insn (buf, SEVL); | |
1373 | } | |
1374 | ||
1375 | /* Write a WFE instruction into *BUF. | |
1376 | ||
1377 | This is a hint instruction telling the hardware to wait for an event. */ | |
1378 | ||
1379 | static int | |
1380 | emit_wfe (uint32_t *buf) | |
1381 | { | |
1382 | return emit_insn (buf, WFE); | |
1383 | } | |
1384 | ||
afbe19f8 PL |
1385 | /* Write a SBFM instruction into *BUF. |
1386 | ||
1387 | SBFM rd, rn, #immr, #imms | |
1388 | ||
1389 | This instruction moves the bits from #immr to #imms into the | |
1390 | destination, sign extending the result. | |
1391 | ||
1392 | RD is the destination register. | |
1393 | RN is the source register. | |
1394 | IMMR is the bit number to start at (least significant bit). | |
1395 | IMMS is the bit number to stop at (most significant bit). */ | |
1396 | ||
1397 | static int | |
1398 | emit_sbfm (uint32_t *buf, struct aarch64_register rd, | |
1399 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1400 | { | |
1401 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1402 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1403 | ||
1404 | return emit_insn (buf, SBFM | size | n | ENCODE (immr, 6, 16) | |
1405 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1406 | | ENCODE (rd.num, 5, 0)); | |
1407 | } | |
1408 | ||
1409 | /* Write a SBFX instruction into *BUF. | |
1410 | ||
1411 | SBFX rd, rn, #lsb, #width | |
1412 | ||
1413 | This instruction moves #width bits from #lsb into the destination, sign | |
1414 | extending the result. This is an alias for: | |
1415 | ||
1416 | SBFM rd, rn, #lsb, #(lsb + width - 1) | |
1417 | ||
1418 | RD is the destination register. | |
1419 | RN is the source register. | |
1420 | LSB is the bit number to start at (least significant bit). | |
1421 | WIDTH is the number of bits to move. */ | |
1422 | ||
1423 | static int | |
1424 | emit_sbfx (uint32_t *buf, struct aarch64_register rd, | |
1425 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1426 | { | |
1427 | return emit_sbfm (buf, rd, rn, lsb, lsb + width - 1); | |
1428 | } | |
1429 | ||
1430 | /* Write a UBFM instruction into *BUF. | |
1431 | ||
1432 | UBFM rd, rn, #immr, #imms | |
1433 | ||
1434 | This instruction moves the bits from #immr to #imms into the | |
1435 | destination, extending the result with zeros. | |
1436 | ||
1437 | RD is the destination register. | |
1438 | RN is the source register. | |
1439 | IMMR is the bit number to start at (least significant bit). | |
1440 | IMMS is the bit number to stop at (most significant bit). */ | |
1441 | ||
1442 | static int | |
1443 | emit_ubfm (uint32_t *buf, struct aarch64_register rd, | |
1444 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1445 | { | |
1446 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1447 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1448 | ||
1449 | return emit_insn (buf, UBFM | size | n | ENCODE (immr, 6, 16) | |
1450 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1451 | | ENCODE (rd.num, 5, 0)); | |
1452 | } | |
1453 | ||
1454 | /* Write a UBFX instruction into *BUF. | |
1455 | ||
1456 | UBFX rd, rn, #lsb, #width | |
1457 | ||
1458 | This instruction moves #width bits from #lsb into the destination, | |
1459 | extending the result with zeros. This is an alias for: | |
1460 | ||
1461 | UBFM rd, rn, #lsb, #(lsb + width - 1) | |
1462 | ||
1463 | RD is the destination register. | |
1464 | RN is the source register. | |
1465 | LSB is the bit number to start at (least significant bit). | |
1466 | WIDTH is the number of bits to move. */ | |
1467 | ||
1468 | static int | |
1469 | emit_ubfx (uint32_t *buf, struct aarch64_register rd, | |
1470 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1471 | { | |
1472 | return emit_ubfm (buf, rd, rn, lsb, lsb + width - 1); | |
1473 | } | |
1474 | ||
1475 | /* Write a CSINC instruction into *BUF. | |
1476 | ||
1477 | CSINC rd, rn, rm, cond | |
1478 | ||
1479 | This instruction conditionally increments rn or rm and places the result | |
1480 | in rd. rn is chosen is the condition is true. | |
1481 | ||
1482 | RD is the destination register. | |
1483 | RN and RM are the source registers. | |
1484 | COND is the encoded condition. */ | |
1485 | ||
1486 | static int | |
1487 | emit_csinc (uint32_t *buf, struct aarch64_register rd, | |
1488 | struct aarch64_register rn, struct aarch64_register rm, | |
1489 | unsigned cond) | |
1490 | { | |
1491 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1492 | ||
1493 | return emit_insn (buf, CSINC | size | ENCODE (rm.num, 5, 16) | |
1494 | | ENCODE (cond, 4, 12) | ENCODE (rn.num, 5, 5) | |
1495 | | ENCODE (rd.num, 5, 0)); | |
1496 | } | |
1497 | ||
1498 | /* Write a CSET instruction into *BUF. | |
1499 | ||
1500 | CSET rd, cond | |
1501 | ||
1502 | This instruction conditionally write 1 or 0 in the destination register. | |
1503 | 1 is written if the condition is true. This is an alias for: | |
1504 | ||
1505 | CSINC rd, xzr, xzr, !cond | |
1506 | ||
1507 | Note that the condition needs to be inverted. | |
1508 | ||
1509 | RD is the destination register. | |
1510 | RN and RM are the source registers. | |
1511 | COND is the encoded condition. */ | |
1512 | ||
1513 | static int | |
1514 | emit_cset (uint32_t *buf, struct aarch64_register rd, unsigned cond) | |
1515 | { | |
1516 | /* The least significant bit of the condition needs toggling in order to | |
1517 | invert it. */ | |
1518 | return emit_csinc (buf, rd, xzr, xzr, cond ^ 0x1); | |
1519 | } | |
1520 | ||
bb903df0 PL |
1521 | /* Write LEN instructions from BUF into the inferior memory at *TO. |
1522 | ||
1523 | Note instructions are always little endian on AArch64, unlike data. */ | |
1524 | ||
1525 | static void | |
1526 | append_insns (CORE_ADDR *to, size_t len, const uint32_t *buf) | |
1527 | { | |
1528 | size_t byte_len = len * sizeof (uint32_t); | |
1529 | #if (__BYTE_ORDER == __BIG_ENDIAN) | |
1530 | uint32_t *le_buf = xmalloc (byte_len); | |
1531 | size_t i; | |
1532 | ||
1533 | for (i = 0; i < len; i++) | |
1534 | le_buf[i] = htole32 (buf[i]); | |
1535 | ||
1536 | write_inferior_memory (*to, (const unsigned char *) le_buf, byte_len); | |
1537 | ||
1538 | xfree (le_buf); | |
1539 | #else | |
1540 | write_inferior_memory (*to, (const unsigned char *) buf, byte_len); | |
1541 | #endif | |
1542 | ||
1543 | *to += byte_len; | |
1544 | } | |
1545 | ||
0badd99f YQ |
1546 | /* Sub-class of struct aarch64_insn_data, store information of |
1547 | instruction relocation for fast tracepoint. Visitor can | |
1548 | relocate an instruction from BASE.INSN_ADDR to NEW_ADDR and save | |
1549 | the relocated instructions in buffer pointed by INSN_PTR. */ | |
bb903df0 | 1550 | |
0badd99f YQ |
1551 | struct aarch64_insn_relocation_data |
1552 | { | |
1553 | struct aarch64_insn_data base; | |
1554 | ||
1555 | /* The new address the instruction is relocated to. */ | |
1556 | CORE_ADDR new_addr; | |
1557 | /* Pointer to the buffer of relocated instruction(s). */ | |
1558 | uint32_t *insn_ptr; | |
1559 | }; | |
1560 | ||
1561 | /* Implementation of aarch64_insn_visitor method "b". */ | |
1562 | ||
1563 | static void | |
1564 | aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset, | |
1565 | struct aarch64_insn_data *data) | |
1566 | { | |
1567 | struct aarch64_insn_relocation_data *insn_reloc | |
1568 | = (struct aarch64_insn_relocation_data *) data; | |
1569 | int32_t new_offset | |
1570 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; | |
1571 | ||
1572 | if (can_encode_int32 (new_offset, 28)) | |
1573 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, is_bl, new_offset); | |
1574 | } | |
1575 | ||
1576 | /* Implementation of aarch64_insn_visitor method "b_cond". */ | |
1577 | ||
1578 | static void | |
1579 | aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset, | |
1580 | struct aarch64_insn_data *data) | |
1581 | { | |
1582 | struct aarch64_insn_relocation_data *insn_reloc | |
1583 | = (struct aarch64_insn_relocation_data *) data; | |
1584 | int32_t new_offset | |
1585 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; | |
1586 | ||
1587 | if (can_encode_int32 (new_offset, 21)) | |
1588 | { | |
1589 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, | |
1590 | new_offset); | |
bb903df0 | 1591 | } |
0badd99f | 1592 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1593 | { |
0badd99f YQ |
1594 | /* The offset is out of range for a conditional branch |
1595 | instruction but not for a unconditional branch. We can use | |
1596 | the following instructions instead: | |
bb903df0 | 1597 | |
0badd99f YQ |
1598 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
1599 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1600 | TAKEN: | |
1601 | B #(offset - 8) | |
1602 | NOT_TAKEN: | |
1603 | ||
1604 | */ | |
1605 | ||
1606 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, 8); | |
1607 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1608 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
bb903df0 | 1609 | } |
0badd99f | 1610 | } |
bb903df0 | 1611 | |
0badd99f YQ |
1612 | /* Implementation of aarch64_insn_visitor method "cb". */ |
1613 | ||
1614 | static void | |
1615 | aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz, | |
1616 | const unsigned rn, int is64, | |
1617 | struct aarch64_insn_data *data) | |
1618 | { | |
1619 | struct aarch64_insn_relocation_data *insn_reloc | |
1620 | = (struct aarch64_insn_relocation_data *) data; | |
1621 | int32_t new_offset | |
1622 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; | |
1623 | ||
1624 | if (can_encode_int32 (new_offset, 21)) | |
1625 | { | |
1626 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1627 | aarch64_register (rn, is64), new_offset); | |
bb903df0 | 1628 | } |
0badd99f | 1629 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1630 | { |
0badd99f YQ |
1631 | /* The offset is out of range for a compare and branch |
1632 | instruction but not for a unconditional branch. We can use | |
1633 | the following instructions instead: | |
1634 | ||
1635 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. | |
1636 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1637 | TAKEN: | |
1638 | B #(offset - 8) | |
1639 | NOT_TAKEN: | |
1640 | ||
1641 | */ | |
1642 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1643 | aarch64_register (rn, is64), 8); | |
1644 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1645 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
1646 | } | |
1647 | } | |
bb903df0 | 1648 | |
0badd99f | 1649 | /* Implementation of aarch64_insn_visitor method "tb". */ |
bb903df0 | 1650 | |
0badd99f YQ |
1651 | static void |
1652 | aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz, | |
1653 | const unsigned rt, unsigned bit, | |
1654 | struct aarch64_insn_data *data) | |
1655 | { | |
1656 | struct aarch64_insn_relocation_data *insn_reloc | |
1657 | = (struct aarch64_insn_relocation_data *) data; | |
1658 | int32_t new_offset | |
1659 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; | |
1660 | ||
1661 | if (can_encode_int32 (new_offset, 16)) | |
1662 | { | |
1663 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1664 | aarch64_register (rt, 1), new_offset); | |
bb903df0 | 1665 | } |
0badd99f | 1666 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1667 | { |
0badd99f YQ |
1668 | /* The offset is out of range for a test bit and branch |
1669 | instruction but not for a unconditional branch. We can use | |
1670 | the following instructions instead: | |
1671 | ||
1672 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. | |
1673 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1674 | TAKEN: | |
1675 | B #(offset - 8) | |
1676 | NOT_TAKEN: | |
1677 | ||
1678 | */ | |
1679 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1680 | aarch64_register (rt, 1), 8); | |
1681 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1682 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, | |
1683 | new_offset - 8); | |
1684 | } | |
1685 | } | |
bb903df0 | 1686 | |
0badd99f | 1687 | /* Implementation of aarch64_insn_visitor method "adr". */ |
bb903df0 | 1688 | |
0badd99f YQ |
1689 | static void |
1690 | aarch64_ftrace_insn_reloc_adr (const int32_t offset, const unsigned rd, | |
1691 | const int is_adrp, | |
1692 | struct aarch64_insn_data *data) | |
1693 | { | |
1694 | struct aarch64_insn_relocation_data *insn_reloc | |
1695 | = (struct aarch64_insn_relocation_data *) data; | |
1696 | /* We know exactly the address the ADR{P,} instruction will compute. | |
1697 | We can just write it to the destination register. */ | |
1698 | CORE_ADDR address = data->insn_addr + offset; | |
bb903df0 | 1699 | |
0badd99f YQ |
1700 | if (is_adrp) |
1701 | { | |
1702 | /* Clear the lower 12 bits of the offset to get the 4K page. */ | |
1703 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1704 | aarch64_register (rd, 1), | |
1705 | address & ~0xfff); | |
1706 | } | |
1707 | else | |
1708 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1709 | aarch64_register (rd, 1), address); | |
1710 | } | |
bb903df0 | 1711 | |
0badd99f | 1712 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
bb903df0 | 1713 | |
0badd99f YQ |
1714 | static void |
1715 | aarch64_ftrace_insn_reloc_ldr_literal (const int32_t offset, const int is_sw, | |
1716 | const unsigned rt, const int is64, | |
1717 | struct aarch64_insn_data *data) | |
1718 | { | |
1719 | struct aarch64_insn_relocation_data *insn_reloc | |
1720 | = (struct aarch64_insn_relocation_data *) data; | |
1721 | CORE_ADDR address = data->insn_addr + offset; | |
1722 | ||
1723 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1724 | aarch64_register (rt, 1), address); | |
1725 | ||
1726 | /* We know exactly what address to load from, and what register we | |
1727 | can use: | |
1728 | ||
1729 | MOV xd, #(oldloc + offset) | |
1730 | MOVK xd, #((oldloc + offset) >> 16), lsl #16 | |
1731 | ... | |
1732 | ||
1733 | LDR xd, [xd] ; or LDRSW xd, [xd] | |
1734 | ||
1735 | */ | |
1736 | ||
1737 | if (is_sw) | |
1738 | insn_reloc->insn_ptr += emit_ldrsw (insn_reloc->insn_ptr, | |
1739 | aarch64_register (rt, 1), | |
1740 | aarch64_register (rt, 1), | |
1741 | offset_memory_operand (0)); | |
bb903df0 | 1742 | else |
0badd99f YQ |
1743 | insn_reloc->insn_ptr += emit_ldr (insn_reloc->insn_ptr, |
1744 | aarch64_register (rt, is64), | |
1745 | aarch64_register (rt, 1), | |
1746 | offset_memory_operand (0)); | |
1747 | } | |
1748 | ||
1749 | /* Implementation of aarch64_insn_visitor method "others". */ | |
1750 | ||
1751 | static void | |
1752 | aarch64_ftrace_insn_reloc_others (const uint32_t insn, | |
1753 | struct aarch64_insn_data *data) | |
1754 | { | |
1755 | struct aarch64_insn_relocation_data *insn_reloc | |
1756 | = (struct aarch64_insn_relocation_data *) data; | |
bb903df0 | 1757 | |
0badd99f YQ |
1758 | /* The instruction is not PC relative. Just re-emit it at the new |
1759 | location. */ | |
1760 | insn_reloc->insn_ptr += emit_insn (insn_reloc->insn_ptr, insn); | |
1761 | } | |
1762 | ||
1763 | static const struct aarch64_insn_visitor visitor = | |
1764 | { | |
1765 | aarch64_ftrace_insn_reloc_b, | |
1766 | aarch64_ftrace_insn_reloc_b_cond, | |
1767 | aarch64_ftrace_insn_reloc_cb, | |
1768 | aarch64_ftrace_insn_reloc_tb, | |
1769 | aarch64_ftrace_insn_reloc_adr, | |
1770 | aarch64_ftrace_insn_reloc_ldr_literal, | |
1771 | aarch64_ftrace_insn_reloc_others, | |
1772 | }; | |
1773 | ||
bb903df0 PL |
1774 | /* Implementation of linux_target_ops method |
1775 | "install_fast_tracepoint_jump_pad". */ | |
1776 | ||
1777 | static int | |
1778 | aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, | |
1779 | CORE_ADDR tpaddr, | |
1780 | CORE_ADDR collector, | |
1781 | CORE_ADDR lockaddr, | |
1782 | ULONGEST orig_size, | |
1783 | CORE_ADDR *jump_entry, | |
1784 | CORE_ADDR *trampoline, | |
1785 | ULONGEST *trampoline_size, | |
1786 | unsigned char *jjump_pad_insn, | |
1787 | ULONGEST *jjump_pad_insn_size, | |
1788 | CORE_ADDR *adjusted_insn_addr, | |
1789 | CORE_ADDR *adjusted_insn_addr_end, | |
1790 | char *err) | |
1791 | { | |
1792 | uint32_t buf[256]; | |
1793 | uint32_t *p = buf; | |
1794 | int32_t offset; | |
1795 | int i; | |
70b439f0 | 1796 | uint32_t insn; |
bb903df0 | 1797 | CORE_ADDR buildaddr = *jump_entry; |
0badd99f | 1798 | struct aarch64_insn_relocation_data insn_data; |
bb903df0 PL |
1799 | |
1800 | /* We need to save the current state on the stack both to restore it | |
1801 | later and to collect register values when the tracepoint is hit. | |
1802 | ||
1803 | The saved registers are pushed in a layout that needs to be in sync | |
1804 | with aarch64_ft_collect_regmap (see linux-aarch64-ipa.c). Later on | |
1805 | the supply_fast_tracepoint_registers function will fill in the | |
1806 | register cache from a pointer to saved registers on the stack we build | |
1807 | here. | |
1808 | ||
1809 | For simplicity, we set the size of each cell on the stack to 16 bytes. | |
1810 | This way one cell can hold any register type, from system registers | |
1811 | to the 128 bit SIMD&FP registers. Furthermore, the stack pointer | |
1812 | has to be 16 bytes aligned anyway. | |
1813 | ||
1814 | Note that the CPSR register does not exist on AArch64. Instead we | |
1815 | can access system bits describing the process state with the | |
1816 | MRS/MSR instructions, namely the condition flags. We save them as | |
1817 | if they are part of a CPSR register because that's how GDB | |
1818 | interprets these system bits. At the moment, only the condition | |
1819 | flags are saved in CPSR (NZCV). | |
1820 | ||
1821 | Stack layout, each cell is 16 bytes (descending): | |
1822 | ||
1823 | High *-------- SIMD&FP registers from 31 down to 0. --------* | |
1824 | | q31 | | |
1825 | . . | |
1826 | . . 32 cells | |
1827 | . . | |
1828 | | q0 | | |
1829 | *---- General purpose registers from 30 down to 0. ----* | |
1830 | | x30 | | |
1831 | . . | |
1832 | . . 31 cells | |
1833 | . . | |
1834 | | x0 | | |
1835 | *------------- Special purpose registers. -------------* | |
1836 | | SP | | |
1837 | | PC | | |
1838 | | CPSR (NZCV) | 5 cells | |
1839 | | FPSR | | |
1840 | | FPCR | <- SP + 16 | |
1841 | *------------- collecting_t object --------------------* | |
1842 | | TPIDR_EL0 | struct tracepoint * | | |
1843 | Low *------------------------------------------------------* | |
1844 | ||
1845 | After this stack is set up, we issue a call to the collector, passing | |
1846 | it the saved registers at (SP + 16). */ | |
1847 | ||
1848 | /* Push SIMD&FP registers on the stack: | |
1849 | ||
1850 | SUB sp, sp, #(32 * 16) | |
1851 | ||
1852 | STP q30, q31, [sp, #(30 * 16)] | |
1853 | ... | |
1854 | STP q0, q1, [sp] | |
1855 | ||
1856 | */ | |
1857 | p += emit_sub (p, sp, sp, immediate_operand (32 * 16)); | |
1858 | for (i = 30; i >= 0; i -= 2) | |
1859 | p += emit_stp_q_offset (p, i, i + 1, sp, i * 16); | |
1860 | ||
1861 | /* Push general puspose registers on the stack. Note that we do not need | |
1862 | to push x31 as it represents the xzr register and not the stack | |
1863 | pointer in a STR instruction. | |
1864 | ||
1865 | SUB sp, sp, #(31 * 16) | |
1866 | ||
1867 | STR x30, [sp, #(30 * 16)] | |
1868 | ... | |
1869 | STR x0, [sp] | |
1870 | ||
1871 | */ | |
1872 | p += emit_sub (p, sp, sp, immediate_operand (31 * 16)); | |
1873 | for (i = 30; i >= 0; i -= 1) | |
1874 | p += emit_str (p, aarch64_register (i, 1), sp, | |
1875 | offset_memory_operand (i * 16)); | |
1876 | ||
1877 | /* Make space for 5 more cells. | |
1878 | ||
1879 | SUB sp, sp, #(5 * 16) | |
1880 | ||
1881 | */ | |
1882 | p += emit_sub (p, sp, sp, immediate_operand (5 * 16)); | |
1883 | ||
1884 | ||
1885 | /* Save SP: | |
1886 | ||
1887 | ADD x4, sp, #((32 + 31 + 5) * 16) | |
1888 | STR x4, [sp, #(4 * 16)] | |
1889 | ||
1890 | */ | |
1891 | p += emit_add (p, x4, sp, immediate_operand ((32 + 31 + 5) * 16)); | |
1892 | p += emit_str (p, x4, sp, offset_memory_operand (4 * 16)); | |
1893 | ||
1894 | /* Save PC (tracepoint address): | |
1895 | ||
1896 | MOV x3, #(tpaddr) | |
1897 | ... | |
1898 | ||
1899 | STR x3, [sp, #(3 * 16)] | |
1900 | ||
1901 | */ | |
1902 | ||
1903 | p += emit_mov_addr (p, x3, tpaddr); | |
1904 | p += emit_str (p, x3, sp, offset_memory_operand (3 * 16)); | |
1905 | ||
1906 | /* Save CPSR (NZCV), FPSR and FPCR: | |
1907 | ||
1908 | MRS x2, nzcv | |
1909 | MRS x1, fpsr | |
1910 | MRS x0, fpcr | |
1911 | ||
1912 | STR x2, [sp, #(2 * 16)] | |
1913 | STR x1, [sp, #(1 * 16)] | |
1914 | STR x0, [sp, #(0 * 16)] | |
1915 | ||
1916 | */ | |
1917 | p += emit_mrs (p, x2, NZCV); | |
1918 | p += emit_mrs (p, x1, FPSR); | |
1919 | p += emit_mrs (p, x0, FPCR); | |
1920 | p += emit_str (p, x2, sp, offset_memory_operand (2 * 16)); | |
1921 | p += emit_str (p, x1, sp, offset_memory_operand (1 * 16)); | |
1922 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
1923 | ||
1924 | /* Push the collecting_t object. It consist of the address of the | |
1925 | tracepoint and an ID for the current thread. We get the latter by | |
1926 | reading the tpidr_el0 system register. It corresponds to the | |
1927 | NT_ARM_TLS register accessible with ptrace. | |
1928 | ||
1929 | MOV x0, #(tpoint) | |
1930 | ... | |
1931 | ||
1932 | MRS x1, tpidr_el0 | |
1933 | ||
1934 | STP x0, x1, [sp, #-16]! | |
1935 | ||
1936 | */ | |
1937 | ||
1938 | p += emit_mov_addr (p, x0, tpoint); | |
1939 | p += emit_mrs (p, x1, TPIDR_EL0); | |
1940 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-16)); | |
1941 | ||
1942 | /* Spin-lock: | |
1943 | ||
1944 | The shared memory for the lock is at lockaddr. It will hold zero | |
1945 | if no-one is holding the lock, otherwise it contains the address of | |
1946 | the collecting_t object on the stack of the thread which acquired it. | |
1947 | ||
1948 | At this stage, the stack pointer points to this thread's collecting_t | |
1949 | object. | |
1950 | ||
1951 | We use the following registers: | |
1952 | - x0: Address of the lock. | |
1953 | - x1: Pointer to collecting_t object. | |
1954 | - x2: Scratch register. | |
1955 | ||
1956 | MOV x0, #(lockaddr) | |
1957 | ... | |
1958 | MOV x1, sp | |
1959 | ||
1960 | ; Trigger an event local to this core. So the following WFE | |
1961 | ; instruction is ignored. | |
1962 | SEVL | |
1963 | again: | |
1964 | ; Wait for an event. The event is triggered by either the SEVL | |
1965 | ; or STLR instructions (store release). | |
1966 | WFE | |
1967 | ||
1968 | ; Atomically read at lockaddr. This marks the memory location as | |
1969 | ; exclusive. This instruction also has memory constraints which | |
1970 | ; make sure all previous data reads and writes are done before | |
1971 | ; executing it. | |
1972 | LDAXR x2, [x0] | |
1973 | ||
1974 | ; Try again if another thread holds the lock. | |
1975 | CBNZ x2, again | |
1976 | ||
1977 | ; We can lock it! Write the address of the collecting_t object. | |
1978 | ; This instruction will fail if the memory location is not marked | |
1979 | ; as exclusive anymore. If it succeeds, it will remove the | |
1980 | ; exclusive mark on the memory location. This way, if another | |
1981 | ; thread executes this instruction before us, we will fail and try | |
1982 | ; all over again. | |
1983 | STXR w2, x1, [x0] | |
1984 | CBNZ w2, again | |
1985 | ||
1986 | */ | |
1987 | ||
1988 | p += emit_mov_addr (p, x0, lockaddr); | |
1989 | p += emit_mov (p, x1, register_operand (sp)); | |
1990 | ||
1991 | p += emit_sevl (p); | |
1992 | p += emit_wfe (p); | |
1993 | p += emit_ldaxr (p, x2, x0); | |
1994 | p += emit_cb (p, 1, w2, -2 * 4); | |
1995 | p += emit_stxr (p, w2, x1, x0); | |
1996 | p += emit_cb (p, 1, x2, -4 * 4); | |
1997 | ||
1998 | /* Call collector (struct tracepoint *, unsigned char *): | |
1999 | ||
2000 | MOV x0, #(tpoint) | |
2001 | ... | |
2002 | ||
2003 | ; Saved registers start after the collecting_t object. | |
2004 | ADD x1, sp, #16 | |
2005 | ||
2006 | ; We use an intra-procedure-call scratch register. | |
2007 | MOV ip0, #(collector) | |
2008 | ... | |
2009 | ||
2010 | ; And call back to C! | |
2011 | BLR ip0 | |
2012 | ||
2013 | */ | |
2014 | ||
2015 | p += emit_mov_addr (p, x0, tpoint); | |
2016 | p += emit_add (p, x1, sp, immediate_operand (16)); | |
2017 | ||
2018 | p += emit_mov_addr (p, ip0, collector); | |
2019 | p += emit_blr (p, ip0); | |
2020 | ||
2021 | /* Release the lock. | |
2022 | ||
2023 | MOV x0, #(lockaddr) | |
2024 | ... | |
2025 | ||
2026 | ; This instruction is a normal store with memory ordering | |
2027 | ; constraints. Thanks to this we do not have to put a data | |
2028 | ; barrier instruction to make sure all data read and writes are done | |
2029 | ; before this instruction is executed. Furthermore, this instrucion | |
2030 | ; will trigger an event, letting other threads know they can grab | |
2031 | ; the lock. | |
2032 | STLR xzr, [x0] | |
2033 | ||
2034 | */ | |
2035 | p += emit_mov_addr (p, x0, lockaddr); | |
2036 | p += emit_stlr (p, xzr, x0); | |
2037 | ||
2038 | /* Free collecting_t object: | |
2039 | ||
2040 | ADD sp, sp, #16 | |
2041 | ||
2042 | */ | |
2043 | p += emit_add (p, sp, sp, immediate_operand (16)); | |
2044 | ||
2045 | /* Restore CPSR (NZCV), FPSR and FPCR. And free all special purpose | |
2046 | registers from the stack. | |
2047 | ||
2048 | LDR x2, [sp, #(2 * 16)] | |
2049 | LDR x1, [sp, #(1 * 16)] | |
2050 | LDR x0, [sp, #(0 * 16)] | |
2051 | ||
2052 | MSR NZCV, x2 | |
2053 | MSR FPSR, x1 | |
2054 | MSR FPCR, x0 | |
2055 | ||
2056 | ADD sp, sp #(5 * 16) | |
2057 | ||
2058 | */ | |
2059 | p += emit_ldr (p, x2, sp, offset_memory_operand (2 * 16)); | |
2060 | p += emit_ldr (p, x1, sp, offset_memory_operand (1 * 16)); | |
2061 | p += emit_ldr (p, x0, sp, offset_memory_operand (0 * 16)); | |
2062 | p += emit_msr (p, NZCV, x2); | |
2063 | p += emit_msr (p, FPSR, x1); | |
2064 | p += emit_msr (p, FPCR, x0); | |
2065 | ||
2066 | p += emit_add (p, sp, sp, immediate_operand (5 * 16)); | |
2067 | ||
2068 | /* Pop general purpose registers: | |
2069 | ||
2070 | LDR x0, [sp] | |
2071 | ... | |
2072 | LDR x30, [sp, #(30 * 16)] | |
2073 | ||
2074 | ADD sp, sp, #(31 * 16) | |
2075 | ||
2076 | */ | |
2077 | for (i = 0; i <= 30; i += 1) | |
2078 | p += emit_ldr (p, aarch64_register (i, 1), sp, | |
2079 | offset_memory_operand (i * 16)); | |
2080 | p += emit_add (p, sp, sp, immediate_operand (31 * 16)); | |
2081 | ||
2082 | /* Pop SIMD&FP registers: | |
2083 | ||
2084 | LDP q0, q1, [sp] | |
2085 | ... | |
2086 | LDP q30, q31, [sp, #(30 * 16)] | |
2087 | ||
2088 | ADD sp, sp, #(32 * 16) | |
2089 | ||
2090 | */ | |
2091 | for (i = 0; i <= 30; i += 2) | |
2092 | p += emit_ldp_q_offset (p, i, i + 1, sp, i * 16); | |
2093 | p += emit_add (p, sp, sp, immediate_operand (32 * 16)); | |
2094 | ||
2095 | /* Write the code into the inferior memory. */ | |
2096 | append_insns (&buildaddr, p - buf, buf); | |
2097 | ||
2098 | /* Now emit the relocated instruction. */ | |
2099 | *adjusted_insn_addr = buildaddr; | |
70b439f0 | 2100 | target_read_uint32 (tpaddr, &insn); |
0badd99f YQ |
2101 | |
2102 | insn_data.base.insn_addr = tpaddr; | |
2103 | insn_data.new_addr = buildaddr; | |
2104 | insn_data.insn_ptr = buf; | |
2105 | ||
2106 | aarch64_relocate_instruction (insn, &visitor, | |
2107 | (struct aarch64_insn_data *) &insn_data); | |
2108 | ||
bb903df0 | 2109 | /* We may not have been able to relocate the instruction. */ |
0badd99f | 2110 | if (insn_data.insn_ptr == buf) |
bb903df0 PL |
2111 | { |
2112 | sprintf (err, | |
2113 | "E.Could not relocate instruction from %s to %s.", | |
2114 | core_addr_to_string_nz (tpaddr), | |
2115 | core_addr_to_string_nz (buildaddr)); | |
2116 | return 1; | |
2117 | } | |
dfaffe9d | 2118 | else |
0badd99f | 2119 | append_insns (&buildaddr, insn_data.insn_ptr - buf, buf); |
dfaffe9d | 2120 | *adjusted_insn_addr_end = buildaddr; |
bb903df0 PL |
2121 | |
2122 | /* Go back to the start of the buffer. */ | |
2123 | p = buf; | |
2124 | ||
2125 | /* Emit a branch back from the jump pad. */ | |
2126 | offset = (tpaddr + orig_size - buildaddr); | |
2127 | if (!can_encode_int32 (offset, 28)) | |
2128 | { | |
2129 | sprintf (err, | |
2130 | "E.Jump back from jump pad too far from tracepoint " | |
2131 | "(offset 0x%" PRIx32 " cannot be encoded in 28 bits).", | |
2132 | offset); | |
2133 | return 1; | |
2134 | } | |
2135 | ||
2136 | p += emit_b (p, 0, offset); | |
2137 | append_insns (&buildaddr, p - buf, buf); | |
2138 | ||
2139 | /* Give the caller a branch instruction into the jump pad. */ | |
2140 | offset = (*jump_entry - tpaddr); | |
2141 | if (!can_encode_int32 (offset, 28)) | |
2142 | { | |
2143 | sprintf (err, | |
2144 | "E.Jump pad too far from tracepoint " | |
2145 | "(offset 0x%" PRIx32 " cannot be encoded in 28 bits).", | |
2146 | offset); | |
2147 | return 1; | |
2148 | } | |
2149 | ||
2150 | emit_b ((uint32_t *) jjump_pad_insn, 0, offset); | |
2151 | *jjump_pad_insn_size = 4; | |
2152 | ||
2153 | /* Return the end address of our pad. */ | |
2154 | *jump_entry = buildaddr; | |
2155 | ||
2156 | return 0; | |
2157 | } | |
2158 | ||
afbe19f8 PL |
2159 | /* Helper function writing LEN instructions from START into |
2160 | current_insn_ptr. */ | |
2161 | ||
2162 | static void | |
2163 | emit_ops_insns (const uint32_t *start, int len) | |
2164 | { | |
2165 | CORE_ADDR buildaddr = current_insn_ptr; | |
2166 | ||
2167 | if (debug_threads) | |
2168 | debug_printf ("Adding %d instrucions at %s\n", | |
2169 | len, paddress (buildaddr)); | |
2170 | ||
2171 | append_insns (&buildaddr, len, start); | |
2172 | current_insn_ptr = buildaddr; | |
2173 | } | |
2174 | ||
2175 | /* Pop a register from the stack. */ | |
2176 | ||
2177 | static int | |
2178 | emit_pop (uint32_t *buf, struct aarch64_register rt) | |
2179 | { | |
2180 | return emit_ldr (buf, rt, sp, postindex_memory_operand (1 * 16)); | |
2181 | } | |
2182 | ||
2183 | /* Push a register on the stack. */ | |
2184 | ||
2185 | static int | |
2186 | emit_push (uint32_t *buf, struct aarch64_register rt) | |
2187 | { | |
2188 | return emit_str (buf, rt, sp, preindex_memory_operand (-1 * 16)); | |
2189 | } | |
2190 | ||
2191 | /* Implementation of emit_ops method "emit_prologue". */ | |
2192 | ||
2193 | static void | |
2194 | aarch64_emit_prologue (void) | |
2195 | { | |
2196 | uint32_t buf[16]; | |
2197 | uint32_t *p = buf; | |
2198 | ||
2199 | /* This function emit a prologue for the following function prototype: | |
2200 | ||
2201 | enum eval_result_type f (unsigned char *regs, | |
2202 | ULONGEST *value); | |
2203 | ||
2204 | The first argument is a buffer of raw registers. The second | |
2205 | argument is the result of | |
2206 | evaluating the expression, which will be set to whatever is on top of | |
2207 | the stack at the end. | |
2208 | ||
2209 | The stack set up by the prologue is as such: | |
2210 | ||
2211 | High *------------------------------------------------------* | |
2212 | | LR | | |
2213 | | FP | <- FP | |
2214 | | x1 (ULONGEST *value) | | |
2215 | | x0 (unsigned char *regs) | | |
2216 | Low *------------------------------------------------------* | |
2217 | ||
2218 | As we are implementing a stack machine, each opcode can expand the | |
2219 | stack so we never know how far we are from the data saved by this | |
2220 | prologue. In order to be able refer to value and regs later, we save | |
2221 | the current stack pointer in the frame pointer. This way, it is not | |
2222 | clobbered when calling C functions. | |
2223 | ||
2224 | Finally, throughtout every operation, we are using register x0 as the | |
2225 | top of the stack, and x1 as a scratch register. */ | |
2226 | ||
2227 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16)); | |
2228 | p += emit_str (p, lr, sp, offset_memory_operand (3 * 8)); | |
2229 | p += emit_str (p, fp, sp, offset_memory_operand (2 * 8)); | |
2230 | ||
2231 | p += emit_add (p, fp, sp, immediate_operand (2 * 8)); | |
2232 | ||
2233 | ||
2234 | emit_ops_insns (buf, p - buf); | |
2235 | } | |
2236 | ||
2237 | /* Implementation of emit_ops method "emit_epilogue". */ | |
2238 | ||
2239 | static void | |
2240 | aarch64_emit_epilogue (void) | |
2241 | { | |
2242 | uint32_t buf[16]; | |
2243 | uint32_t *p = buf; | |
2244 | ||
2245 | /* Store the result of the expression (x0) in *value. */ | |
2246 | p += emit_sub (p, x1, fp, immediate_operand (1 * 8)); | |
2247 | p += emit_ldr (p, x1, x1, offset_memory_operand (0)); | |
2248 | p += emit_str (p, x0, x1, offset_memory_operand (0)); | |
2249 | ||
2250 | /* Restore the previous state. */ | |
2251 | p += emit_add (p, sp, fp, immediate_operand (2 * 8)); | |
2252 | p += emit_ldp (p, fp, lr, fp, offset_memory_operand (0)); | |
2253 | ||
2254 | /* Return expr_eval_no_error. */ | |
2255 | p += emit_mov (p, x0, immediate_operand (expr_eval_no_error)); | |
2256 | p += emit_ret (p, lr); | |
2257 | ||
2258 | emit_ops_insns (buf, p - buf); | |
2259 | } | |
2260 | ||
2261 | /* Implementation of emit_ops method "emit_add". */ | |
2262 | ||
2263 | static void | |
2264 | aarch64_emit_add (void) | |
2265 | { | |
2266 | uint32_t buf[16]; | |
2267 | uint32_t *p = buf; | |
2268 | ||
2269 | p += emit_pop (p, x1); | |
2270 | p += emit_add (p, x0, x0, register_operand (x1)); | |
2271 | ||
2272 | emit_ops_insns (buf, p - buf); | |
2273 | } | |
2274 | ||
2275 | /* Implementation of emit_ops method "emit_sub". */ | |
2276 | ||
2277 | static void | |
2278 | aarch64_emit_sub (void) | |
2279 | { | |
2280 | uint32_t buf[16]; | |
2281 | uint32_t *p = buf; | |
2282 | ||
2283 | p += emit_pop (p, x1); | |
2284 | p += emit_sub (p, x0, x0, register_operand (x1)); | |
2285 | ||
2286 | emit_ops_insns (buf, p - buf); | |
2287 | } | |
2288 | ||
2289 | /* Implementation of emit_ops method "emit_mul". */ | |
2290 | ||
2291 | static void | |
2292 | aarch64_emit_mul (void) | |
2293 | { | |
2294 | uint32_t buf[16]; | |
2295 | uint32_t *p = buf; | |
2296 | ||
2297 | p += emit_pop (p, x1); | |
2298 | p += emit_mul (p, x0, x1, x0); | |
2299 | ||
2300 | emit_ops_insns (buf, p - buf); | |
2301 | } | |
2302 | ||
2303 | /* Implementation of emit_ops method "emit_lsh". */ | |
2304 | ||
2305 | static void | |
2306 | aarch64_emit_lsh (void) | |
2307 | { | |
2308 | uint32_t buf[16]; | |
2309 | uint32_t *p = buf; | |
2310 | ||
2311 | p += emit_pop (p, x1); | |
2312 | p += emit_lslv (p, x0, x1, x0); | |
2313 | ||
2314 | emit_ops_insns (buf, p - buf); | |
2315 | } | |
2316 | ||
2317 | /* Implementation of emit_ops method "emit_rsh_signed". */ | |
2318 | ||
2319 | static void | |
2320 | aarch64_emit_rsh_signed (void) | |
2321 | { | |
2322 | uint32_t buf[16]; | |
2323 | uint32_t *p = buf; | |
2324 | ||
2325 | p += emit_pop (p, x1); | |
2326 | p += emit_asrv (p, x0, x1, x0); | |
2327 | ||
2328 | emit_ops_insns (buf, p - buf); | |
2329 | } | |
2330 | ||
2331 | /* Implementation of emit_ops method "emit_rsh_unsigned". */ | |
2332 | ||
2333 | static void | |
2334 | aarch64_emit_rsh_unsigned (void) | |
2335 | { | |
2336 | uint32_t buf[16]; | |
2337 | uint32_t *p = buf; | |
2338 | ||
2339 | p += emit_pop (p, x1); | |
2340 | p += emit_lsrv (p, x0, x1, x0); | |
2341 | ||
2342 | emit_ops_insns (buf, p - buf); | |
2343 | } | |
2344 | ||
2345 | /* Implementation of emit_ops method "emit_ext". */ | |
2346 | ||
2347 | static void | |
2348 | aarch64_emit_ext (int arg) | |
2349 | { | |
2350 | uint32_t buf[16]; | |
2351 | uint32_t *p = buf; | |
2352 | ||
2353 | p += emit_sbfx (p, x0, x0, 0, arg); | |
2354 | ||
2355 | emit_ops_insns (buf, p - buf); | |
2356 | } | |
2357 | ||
2358 | /* Implementation of emit_ops method "emit_log_not". */ | |
2359 | ||
2360 | static void | |
2361 | aarch64_emit_log_not (void) | |
2362 | { | |
2363 | uint32_t buf[16]; | |
2364 | uint32_t *p = buf; | |
2365 | ||
2366 | /* If the top of the stack is 0, replace it with 1. Else replace it with | |
2367 | 0. */ | |
2368 | ||
2369 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2370 | p += emit_cset (p, x0, EQ); | |
2371 | ||
2372 | emit_ops_insns (buf, p - buf); | |
2373 | } | |
2374 | ||
2375 | /* Implementation of emit_ops method "emit_bit_and". */ | |
2376 | ||
2377 | static void | |
2378 | aarch64_emit_bit_and (void) | |
2379 | { | |
2380 | uint32_t buf[16]; | |
2381 | uint32_t *p = buf; | |
2382 | ||
2383 | p += emit_pop (p, x1); | |
2384 | p += emit_and (p, x0, x0, x1); | |
2385 | ||
2386 | emit_ops_insns (buf, p - buf); | |
2387 | } | |
2388 | ||
2389 | /* Implementation of emit_ops method "emit_bit_or". */ | |
2390 | ||
2391 | static void | |
2392 | aarch64_emit_bit_or (void) | |
2393 | { | |
2394 | uint32_t buf[16]; | |
2395 | uint32_t *p = buf; | |
2396 | ||
2397 | p += emit_pop (p, x1); | |
2398 | p += emit_orr (p, x0, x0, x1); | |
2399 | ||
2400 | emit_ops_insns (buf, p - buf); | |
2401 | } | |
2402 | ||
2403 | /* Implementation of emit_ops method "emit_bit_xor". */ | |
2404 | ||
2405 | static void | |
2406 | aarch64_emit_bit_xor (void) | |
2407 | { | |
2408 | uint32_t buf[16]; | |
2409 | uint32_t *p = buf; | |
2410 | ||
2411 | p += emit_pop (p, x1); | |
2412 | p += emit_eor (p, x0, x0, x1); | |
2413 | ||
2414 | emit_ops_insns (buf, p - buf); | |
2415 | } | |
2416 | ||
2417 | /* Implementation of emit_ops method "emit_bit_not". */ | |
2418 | ||
2419 | static void | |
2420 | aarch64_emit_bit_not (void) | |
2421 | { | |
2422 | uint32_t buf[16]; | |
2423 | uint32_t *p = buf; | |
2424 | ||
2425 | p += emit_mvn (p, x0, x0); | |
2426 | ||
2427 | emit_ops_insns (buf, p - buf); | |
2428 | } | |
2429 | ||
2430 | /* Implementation of emit_ops method "emit_equal". */ | |
2431 | ||
2432 | static void | |
2433 | aarch64_emit_equal (void) | |
2434 | { | |
2435 | uint32_t buf[16]; | |
2436 | uint32_t *p = buf; | |
2437 | ||
2438 | p += emit_pop (p, x1); | |
2439 | p += emit_cmp (p, x0, register_operand (x1)); | |
2440 | p += emit_cset (p, x0, EQ); | |
2441 | ||
2442 | emit_ops_insns (buf, p - buf); | |
2443 | } | |
2444 | ||
2445 | /* Implementation of emit_ops method "emit_less_signed". */ | |
2446 | ||
2447 | static void | |
2448 | aarch64_emit_less_signed (void) | |
2449 | { | |
2450 | uint32_t buf[16]; | |
2451 | uint32_t *p = buf; | |
2452 | ||
2453 | p += emit_pop (p, x1); | |
2454 | p += emit_cmp (p, x1, register_operand (x0)); | |
2455 | p += emit_cset (p, x0, LT); | |
2456 | ||
2457 | emit_ops_insns (buf, p - buf); | |
2458 | } | |
2459 | ||
2460 | /* Implementation of emit_ops method "emit_less_unsigned". */ | |
2461 | ||
2462 | static void | |
2463 | aarch64_emit_less_unsigned (void) | |
2464 | { | |
2465 | uint32_t buf[16]; | |
2466 | uint32_t *p = buf; | |
2467 | ||
2468 | p += emit_pop (p, x1); | |
2469 | p += emit_cmp (p, x1, register_operand (x0)); | |
2470 | p += emit_cset (p, x0, LO); | |
2471 | ||
2472 | emit_ops_insns (buf, p - buf); | |
2473 | } | |
2474 | ||
2475 | /* Implementation of emit_ops method "emit_ref". */ | |
2476 | ||
2477 | static void | |
2478 | aarch64_emit_ref (int size) | |
2479 | { | |
2480 | uint32_t buf[16]; | |
2481 | uint32_t *p = buf; | |
2482 | ||
2483 | switch (size) | |
2484 | { | |
2485 | case 1: | |
2486 | p += emit_ldrb (p, w0, x0, offset_memory_operand (0)); | |
2487 | break; | |
2488 | case 2: | |
2489 | p += emit_ldrh (p, w0, x0, offset_memory_operand (0)); | |
2490 | break; | |
2491 | case 4: | |
2492 | p += emit_ldr (p, w0, x0, offset_memory_operand (0)); | |
2493 | break; | |
2494 | case 8: | |
2495 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2496 | break; | |
2497 | default: | |
2498 | /* Unknown size, bail on compilation. */ | |
2499 | emit_error = 1; | |
2500 | break; | |
2501 | } | |
2502 | ||
2503 | emit_ops_insns (buf, p - buf); | |
2504 | } | |
2505 | ||
2506 | /* Implementation of emit_ops method "emit_if_goto". */ | |
2507 | ||
2508 | static void | |
2509 | aarch64_emit_if_goto (int *offset_p, int *size_p) | |
2510 | { | |
2511 | uint32_t buf[16]; | |
2512 | uint32_t *p = buf; | |
2513 | ||
2514 | /* The Z flag is set or cleared here. */ | |
2515 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2516 | /* This instruction must not change the Z flag. */ | |
2517 | p += emit_pop (p, x0); | |
2518 | /* Branch over the next instruction if x0 == 0. */ | |
2519 | p += emit_bcond (p, EQ, 8); | |
2520 | ||
2521 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2522 | if (offset_p) | |
2523 | *offset_p = (p - buf) * 4; | |
2524 | if (size_p) | |
2525 | *size_p = 4; | |
2526 | p += emit_nop (p); | |
2527 | ||
2528 | emit_ops_insns (buf, p - buf); | |
2529 | } | |
2530 | ||
2531 | /* Implementation of emit_ops method "emit_goto". */ | |
2532 | ||
2533 | static void | |
2534 | aarch64_emit_goto (int *offset_p, int *size_p) | |
2535 | { | |
2536 | uint32_t buf[16]; | |
2537 | uint32_t *p = buf; | |
2538 | ||
2539 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2540 | if (offset_p) | |
2541 | *offset_p = 0; | |
2542 | if (size_p) | |
2543 | *size_p = 4; | |
2544 | p += emit_nop (p); | |
2545 | ||
2546 | emit_ops_insns (buf, p - buf); | |
2547 | } | |
2548 | ||
2549 | /* Implementation of emit_ops method "write_goto_address". */ | |
2550 | ||
2551 | void | |
2552 | aarch64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) | |
2553 | { | |
2554 | uint32_t insn; | |
2555 | ||
2556 | emit_b (&insn, 0, to - from); | |
2557 | append_insns (&from, 1, &insn); | |
2558 | } | |
2559 | ||
2560 | /* Implementation of emit_ops method "emit_const". */ | |
2561 | ||
2562 | static void | |
2563 | aarch64_emit_const (LONGEST num) | |
2564 | { | |
2565 | uint32_t buf[16]; | |
2566 | uint32_t *p = buf; | |
2567 | ||
2568 | p += emit_mov_addr (p, x0, num); | |
2569 | ||
2570 | emit_ops_insns (buf, p - buf); | |
2571 | } | |
2572 | ||
2573 | /* Implementation of emit_ops method "emit_call". */ | |
2574 | ||
2575 | static void | |
2576 | aarch64_emit_call (CORE_ADDR fn) | |
2577 | { | |
2578 | uint32_t buf[16]; | |
2579 | uint32_t *p = buf; | |
2580 | ||
2581 | p += emit_mov_addr (p, ip0, fn); | |
2582 | p += emit_blr (p, ip0); | |
2583 | ||
2584 | emit_ops_insns (buf, p - buf); | |
2585 | } | |
2586 | ||
2587 | /* Implementation of emit_ops method "emit_reg". */ | |
2588 | ||
2589 | static void | |
2590 | aarch64_emit_reg (int reg) | |
2591 | { | |
2592 | uint32_t buf[16]; | |
2593 | uint32_t *p = buf; | |
2594 | ||
2595 | /* Set x0 to unsigned char *regs. */ | |
2596 | p += emit_sub (p, x0, fp, immediate_operand (2 * 8)); | |
2597 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2598 | p += emit_mov (p, x1, immediate_operand (reg)); | |
2599 | ||
2600 | emit_ops_insns (buf, p - buf); | |
2601 | ||
2602 | aarch64_emit_call (get_raw_reg_func_addr ()); | |
2603 | } | |
2604 | ||
2605 | /* Implementation of emit_ops method "emit_pop". */ | |
2606 | ||
2607 | static void | |
2608 | aarch64_emit_pop (void) | |
2609 | { | |
2610 | uint32_t buf[16]; | |
2611 | uint32_t *p = buf; | |
2612 | ||
2613 | p += emit_pop (p, x0); | |
2614 | ||
2615 | emit_ops_insns (buf, p - buf); | |
2616 | } | |
2617 | ||
2618 | /* Implementation of emit_ops method "emit_stack_flush". */ | |
2619 | ||
2620 | static void | |
2621 | aarch64_emit_stack_flush (void) | |
2622 | { | |
2623 | uint32_t buf[16]; | |
2624 | uint32_t *p = buf; | |
2625 | ||
2626 | p += emit_push (p, x0); | |
2627 | ||
2628 | emit_ops_insns (buf, p - buf); | |
2629 | } | |
2630 | ||
2631 | /* Implementation of emit_ops method "emit_zero_ext". */ | |
2632 | ||
2633 | static void | |
2634 | aarch64_emit_zero_ext (int arg) | |
2635 | { | |
2636 | uint32_t buf[16]; | |
2637 | uint32_t *p = buf; | |
2638 | ||
2639 | p += emit_ubfx (p, x0, x0, 0, arg); | |
2640 | ||
2641 | emit_ops_insns (buf, p - buf); | |
2642 | } | |
2643 | ||
2644 | /* Implementation of emit_ops method "emit_swap". */ | |
2645 | ||
2646 | static void | |
2647 | aarch64_emit_swap (void) | |
2648 | { | |
2649 | uint32_t buf[16]; | |
2650 | uint32_t *p = buf; | |
2651 | ||
2652 | p += emit_ldr (p, x1, sp, offset_memory_operand (0 * 16)); | |
2653 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2654 | p += emit_mov (p, x0, register_operand (x1)); | |
2655 | ||
2656 | emit_ops_insns (buf, p - buf); | |
2657 | } | |
2658 | ||
2659 | /* Implementation of emit_ops method "emit_stack_adjust". */ | |
2660 | ||
2661 | static void | |
2662 | aarch64_emit_stack_adjust (int n) | |
2663 | { | |
2664 | /* This is not needed with our design. */ | |
2665 | uint32_t buf[16]; | |
2666 | uint32_t *p = buf; | |
2667 | ||
2668 | p += emit_add (p, sp, sp, immediate_operand (n * 16)); | |
2669 | ||
2670 | emit_ops_insns (buf, p - buf); | |
2671 | } | |
2672 | ||
2673 | /* Implementation of emit_ops method "emit_int_call_1". */ | |
2674 | ||
2675 | static void | |
2676 | aarch64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2677 | { | |
2678 | uint32_t buf[16]; | |
2679 | uint32_t *p = buf; | |
2680 | ||
2681 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2682 | ||
2683 | emit_ops_insns (buf, p - buf); | |
2684 | ||
2685 | aarch64_emit_call (fn); | |
2686 | } | |
2687 | ||
2688 | /* Implementation of emit_ops method "emit_void_call_2". */ | |
2689 | ||
2690 | static void | |
2691 | aarch64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2692 | { | |
2693 | uint32_t buf[16]; | |
2694 | uint32_t *p = buf; | |
2695 | ||
2696 | /* Push x0 on the stack. */ | |
2697 | aarch64_emit_stack_flush (); | |
2698 | ||
2699 | /* Setup arguments for the function call: | |
2700 | ||
2701 | x0: arg1 | |
2702 | x1: top of the stack | |
2703 | ||
2704 | MOV x1, x0 | |
2705 | MOV x0, #arg1 */ | |
2706 | ||
2707 | p += emit_mov (p, x1, register_operand (x0)); | |
2708 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2709 | ||
2710 | emit_ops_insns (buf, p - buf); | |
2711 | ||
2712 | aarch64_emit_call (fn); | |
2713 | ||
2714 | /* Restore x0. */ | |
2715 | aarch64_emit_pop (); | |
2716 | } | |
2717 | ||
2718 | /* Implementation of emit_ops method "emit_eq_goto". */ | |
2719 | ||
2720 | static void | |
2721 | aarch64_emit_eq_goto (int *offset_p, int *size_p) | |
2722 | { | |
2723 | uint32_t buf[16]; | |
2724 | uint32_t *p = buf; | |
2725 | ||
2726 | p += emit_pop (p, x1); | |
2727 | p += emit_cmp (p, x1, register_operand (x0)); | |
2728 | /* Branch over the next instruction if x0 != x1. */ | |
2729 | p += emit_bcond (p, NE, 8); | |
2730 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2731 | if (offset_p) | |
2732 | *offset_p = (p - buf) * 4; | |
2733 | if (size_p) | |
2734 | *size_p = 4; | |
2735 | p += emit_nop (p); | |
2736 | ||
2737 | emit_ops_insns (buf, p - buf); | |
2738 | } | |
2739 | ||
2740 | /* Implementation of emit_ops method "emit_ne_goto". */ | |
2741 | ||
2742 | static void | |
2743 | aarch64_emit_ne_goto (int *offset_p, int *size_p) | |
2744 | { | |
2745 | uint32_t buf[16]; | |
2746 | uint32_t *p = buf; | |
2747 | ||
2748 | p += emit_pop (p, x1); | |
2749 | p += emit_cmp (p, x1, register_operand (x0)); | |
2750 | /* Branch over the next instruction if x0 == x1. */ | |
2751 | p += emit_bcond (p, EQ, 8); | |
2752 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2753 | if (offset_p) | |
2754 | *offset_p = (p - buf) * 4; | |
2755 | if (size_p) | |
2756 | *size_p = 4; | |
2757 | p += emit_nop (p); | |
2758 | ||
2759 | emit_ops_insns (buf, p - buf); | |
2760 | } | |
2761 | ||
2762 | /* Implementation of emit_ops method "emit_lt_goto". */ | |
2763 | ||
2764 | static void | |
2765 | aarch64_emit_lt_goto (int *offset_p, int *size_p) | |
2766 | { | |
2767 | uint32_t buf[16]; | |
2768 | uint32_t *p = buf; | |
2769 | ||
2770 | p += emit_pop (p, x1); | |
2771 | p += emit_cmp (p, x1, register_operand (x0)); | |
2772 | /* Branch over the next instruction if x0 >= x1. */ | |
2773 | p += emit_bcond (p, GE, 8); | |
2774 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2775 | if (offset_p) | |
2776 | *offset_p = (p - buf) * 4; | |
2777 | if (size_p) | |
2778 | *size_p = 4; | |
2779 | p += emit_nop (p); | |
2780 | ||
2781 | emit_ops_insns (buf, p - buf); | |
2782 | } | |
2783 | ||
2784 | /* Implementation of emit_ops method "emit_le_goto". */ | |
2785 | ||
2786 | static void | |
2787 | aarch64_emit_le_goto (int *offset_p, int *size_p) | |
2788 | { | |
2789 | uint32_t buf[16]; | |
2790 | uint32_t *p = buf; | |
2791 | ||
2792 | p += emit_pop (p, x1); | |
2793 | p += emit_cmp (p, x1, register_operand (x0)); | |
2794 | /* Branch over the next instruction if x0 > x1. */ | |
2795 | p += emit_bcond (p, GT, 8); | |
2796 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2797 | if (offset_p) | |
2798 | *offset_p = (p - buf) * 4; | |
2799 | if (size_p) | |
2800 | *size_p = 4; | |
2801 | p += emit_nop (p); | |
2802 | ||
2803 | emit_ops_insns (buf, p - buf); | |
2804 | } | |
2805 | ||
2806 | /* Implementation of emit_ops method "emit_gt_goto". */ | |
2807 | ||
2808 | static void | |
2809 | aarch64_emit_gt_goto (int *offset_p, int *size_p) | |
2810 | { | |
2811 | uint32_t buf[16]; | |
2812 | uint32_t *p = buf; | |
2813 | ||
2814 | p += emit_pop (p, x1); | |
2815 | p += emit_cmp (p, x1, register_operand (x0)); | |
2816 | /* Branch over the next instruction if x0 <= x1. */ | |
2817 | p += emit_bcond (p, LE, 8); | |
2818 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2819 | if (offset_p) | |
2820 | *offset_p = (p - buf) * 4; | |
2821 | if (size_p) | |
2822 | *size_p = 4; | |
2823 | p += emit_nop (p); | |
2824 | ||
2825 | emit_ops_insns (buf, p - buf); | |
2826 | } | |
2827 | ||
2828 | /* Implementation of emit_ops method "emit_ge_got". */ | |
2829 | ||
2830 | static void | |
2831 | aarch64_emit_ge_got (int *offset_p, int *size_p) | |
2832 | { | |
2833 | uint32_t buf[16]; | |
2834 | uint32_t *p = buf; | |
2835 | ||
2836 | p += emit_pop (p, x1); | |
2837 | p += emit_cmp (p, x1, register_operand (x0)); | |
2838 | /* Branch over the next instruction if x0 <= x1. */ | |
2839 | p += emit_bcond (p, LT, 8); | |
2840 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2841 | if (offset_p) | |
2842 | *offset_p = (p - buf) * 4; | |
2843 | if (size_p) | |
2844 | *size_p = 4; | |
2845 | p += emit_nop (p); | |
2846 | ||
2847 | emit_ops_insns (buf, p - buf); | |
2848 | } | |
2849 | ||
2850 | static struct emit_ops aarch64_emit_ops_impl = | |
2851 | { | |
2852 | aarch64_emit_prologue, | |
2853 | aarch64_emit_epilogue, | |
2854 | aarch64_emit_add, | |
2855 | aarch64_emit_sub, | |
2856 | aarch64_emit_mul, | |
2857 | aarch64_emit_lsh, | |
2858 | aarch64_emit_rsh_signed, | |
2859 | aarch64_emit_rsh_unsigned, | |
2860 | aarch64_emit_ext, | |
2861 | aarch64_emit_log_not, | |
2862 | aarch64_emit_bit_and, | |
2863 | aarch64_emit_bit_or, | |
2864 | aarch64_emit_bit_xor, | |
2865 | aarch64_emit_bit_not, | |
2866 | aarch64_emit_equal, | |
2867 | aarch64_emit_less_signed, | |
2868 | aarch64_emit_less_unsigned, | |
2869 | aarch64_emit_ref, | |
2870 | aarch64_emit_if_goto, | |
2871 | aarch64_emit_goto, | |
2872 | aarch64_write_goto_address, | |
2873 | aarch64_emit_const, | |
2874 | aarch64_emit_call, | |
2875 | aarch64_emit_reg, | |
2876 | aarch64_emit_pop, | |
2877 | aarch64_emit_stack_flush, | |
2878 | aarch64_emit_zero_ext, | |
2879 | aarch64_emit_swap, | |
2880 | aarch64_emit_stack_adjust, | |
2881 | aarch64_emit_int_call_1, | |
2882 | aarch64_emit_void_call_2, | |
2883 | aarch64_emit_eq_goto, | |
2884 | aarch64_emit_ne_goto, | |
2885 | aarch64_emit_lt_goto, | |
2886 | aarch64_emit_le_goto, | |
2887 | aarch64_emit_gt_goto, | |
2888 | aarch64_emit_ge_got, | |
2889 | }; | |
2890 | ||
2891 | /* Implementation of linux_target_ops method "emit_ops". */ | |
2892 | ||
2893 | static struct emit_ops * | |
2894 | aarch64_emit_ops (void) | |
2895 | { | |
2896 | return &aarch64_emit_ops_impl; | |
2897 | } | |
2898 | ||
bb903df0 PL |
2899 | /* Implementation of linux_target_ops method |
2900 | "get_min_fast_tracepoint_insn_len". */ | |
2901 | ||
2902 | static int | |
2903 | aarch64_get_min_fast_tracepoint_insn_len (void) | |
2904 | { | |
2905 | return 4; | |
2906 | } | |
2907 | ||
d1d0aea1 PL |
2908 | /* Implementation of linux_target_ops method "supports_range_stepping". */ |
2909 | ||
2910 | static int | |
2911 | aarch64_supports_range_stepping (void) | |
2912 | { | |
2913 | return 1; | |
2914 | } | |
2915 | ||
176eb98c MS |
2916 | struct linux_target_ops the_low_target = |
2917 | { | |
2918 | aarch64_arch_setup, | |
3aee8918 | 2919 | aarch64_regs_info, |
176eb98c MS |
2920 | aarch64_cannot_fetch_register, |
2921 | aarch64_cannot_store_register, | |
421530db | 2922 | NULL, /* fetch_register */ |
176eb98c MS |
2923 | aarch64_get_pc, |
2924 | aarch64_set_pc, | |
2925 | (const unsigned char *) &aarch64_breakpoint, | |
2926 | aarch64_breakpoint_len, | |
421530db PL |
2927 | NULL, /* breakpoint_reinsert_addr */ |
2928 | 0, /* decr_pc_after_break */ | |
176eb98c | 2929 | aarch64_breakpoint_at, |
802e8e6d | 2930 | aarch64_supports_z_point_type, |
176eb98c MS |
2931 | aarch64_insert_point, |
2932 | aarch64_remove_point, | |
2933 | aarch64_stopped_by_watchpoint, | |
2934 | aarch64_stopped_data_address, | |
421530db PL |
2935 | NULL, /* collect_ptrace_register */ |
2936 | NULL, /* supply_ptrace_register */ | |
ade90bde | 2937 | aarch64_linux_siginfo_fixup, |
176eb98c MS |
2938 | aarch64_linux_new_process, |
2939 | aarch64_linux_new_thread, | |
3a8a0396 | 2940 | aarch64_linux_new_fork, |
176eb98c | 2941 | aarch64_linux_prepare_to_resume, |
421530db | 2942 | NULL, /* process_qsupported */ |
7671bf47 | 2943 | aarch64_supports_tracepoints, |
bb903df0 PL |
2944 | aarch64_get_thread_area, |
2945 | aarch64_install_fast_tracepoint_jump_pad, | |
afbe19f8 | 2946 | aarch64_emit_ops, |
bb903df0 | 2947 | aarch64_get_min_fast_tracepoint_insn_len, |
d1d0aea1 | 2948 | aarch64_supports_range_stepping, |
176eb98c | 2949 | }; |
3aee8918 PA |
2950 | |
2951 | void | |
2952 | initialize_low_arch (void) | |
2953 | { | |
2954 | init_registers_aarch64 (); | |
2955 | ||
3b53ae99 YQ |
2956 | initialize_low_arch_aarch32 (); |
2957 | ||
3aee8918 PA |
2958 | initialize_regsets_info (&aarch64_regsets_info); |
2959 | } |