Commit | Line | Data |
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176eb98c MS |
1 | /* GNU/Linux/AArch64 specific low level interface, for the remote server for |
2 | GDB. | |
3 | ||
42a4f53d | 4 | Copyright (C) 2009-2019 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" | |
cc628f3d | 41 | #include "arch/aarch64.h" |
d6d7ce56 | 42 | #include "linux-aarch64-tdesc.h" |
fefa175e | 43 | #include "nat/aarch64-sve-linux-ptrace.h" |
02895270 | 44 | #include "tdesc.h" |
176eb98c | 45 | |
176eb98c MS |
46 | #ifdef HAVE_SYS_REG_H |
47 | #include <sys/reg.h> | |
48 | #endif | |
49 | ||
176eb98c MS |
50 | /* Per-process arch-specific data we want to keep. */ |
51 | ||
52 | struct arch_process_info | |
53 | { | |
54 | /* Hardware breakpoint/watchpoint data. | |
55 | The reason for them to be per-process rather than per-thread is | |
56 | due to the lack of information in the gdbserver environment; | |
57 | gdbserver is not told that whether a requested hardware | |
58 | breakpoint/watchpoint is thread specific or not, so it has to set | |
59 | each hw bp/wp for every thread in the current process. The | |
60 | higher level bp/wp management in gdb will resume a thread if a hw | |
61 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
62 | same for each thread, it is reasonable for the data to live here. | |
63 | */ | |
64 | struct aarch64_debug_reg_state debug_reg_state; | |
65 | }; | |
66 | ||
3b53ae99 YQ |
67 | /* Return true if the size of register 0 is 8 byte. */ |
68 | ||
69 | static int | |
70 | is_64bit_tdesc (void) | |
71 | { | |
72 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
73 | ||
74 | return register_size (regcache->tdesc, 0) == 8; | |
75 | } | |
76 | ||
02895270 AH |
77 | /* Return true if the regcache contains the number of SVE registers. */ |
78 | ||
79 | static bool | |
80 | is_sve_tdesc (void) | |
81 | { | |
82 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
83 | ||
84 | return regcache->tdesc->reg_defs.size () == AARCH64_SVE_NUM_REGS; | |
85 | } | |
86 | ||
176eb98c MS |
87 | static void |
88 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
89 | { | |
6a69a054 | 90 | struct user_pt_regs *regset = (struct user_pt_regs *) buf; |
176eb98c MS |
91 | int i; |
92 | ||
93 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
94 | collect_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
95 | collect_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
96 | collect_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
97 | collect_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
98 | } |
99 | ||
100 | static void | |
101 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
102 | { | |
6a69a054 | 103 | const struct user_pt_regs *regset = (const struct user_pt_regs *) buf; |
176eb98c MS |
104 | int i; |
105 | ||
106 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
107 | supply_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
108 | supply_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
109 | supply_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
110 | supply_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
111 | } |
112 | ||
113 | static void | |
114 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
115 | { | |
9caa3311 | 116 | struct user_fpsimd_state *regset = (struct user_fpsimd_state *) buf; |
176eb98c MS |
117 | int i; |
118 | ||
119 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
120 | collect_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
121 | collect_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
122 | collect_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
123 | } |
124 | ||
125 | static void | |
126 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
127 | { | |
9caa3311 YQ |
128 | const struct user_fpsimd_state *regset |
129 | = (const struct user_fpsimd_state *) buf; | |
176eb98c MS |
130 | int i; |
131 | ||
132 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
133 | supply_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
134 | supply_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
135 | supply_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
136 | } |
137 | ||
1ef53e6b AH |
138 | /* Store the pauth registers to regcache. */ |
139 | ||
140 | static void | |
141 | aarch64_store_pauthregset (struct regcache *regcache, const void *buf) | |
142 | { | |
143 | uint64_t *pauth_regset = (uint64_t *) buf; | |
144 | int pauth_base = find_regno (regcache->tdesc, "pauth_dmask"); | |
145 | ||
146 | if (pauth_base == 0) | |
147 | return; | |
148 | ||
149 | supply_register (regcache, AARCH64_PAUTH_DMASK_REGNUM (pauth_base), | |
150 | &pauth_regset[0]); | |
151 | supply_register (regcache, AARCH64_PAUTH_CMASK_REGNUM (pauth_base), | |
152 | &pauth_regset[1]); | |
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 | 164 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 165 | return linux_get_pc_64bit (regcache); |
8a7e4587 | 166 | else |
a5652c21 | 167 | return linux_get_pc_32bit (regcache); |
176eb98c MS |
168 | } |
169 | ||
421530db PL |
170 | /* Implementation of linux_target_ops method "set_pc". */ |
171 | ||
176eb98c MS |
172 | static void |
173 | aarch64_set_pc (struct regcache *regcache, CORE_ADDR pc) | |
174 | { | |
8a7e4587 | 175 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 176 | linux_set_pc_64bit (regcache, pc); |
8a7e4587 | 177 | else |
a5652c21 | 178 | linux_set_pc_32bit (regcache, pc); |
176eb98c MS |
179 | } |
180 | ||
176eb98c MS |
181 | #define aarch64_breakpoint_len 4 |
182 | ||
37d66942 PL |
183 | /* AArch64 BRK software debug mode instruction. |
184 | This instruction needs to match gdb/aarch64-tdep.c | |
185 | (aarch64_default_breakpoint). */ | |
186 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 187 | |
421530db PL |
188 | /* Implementation of linux_target_ops method "breakpoint_at". */ |
189 | ||
176eb98c MS |
190 | static int |
191 | aarch64_breakpoint_at (CORE_ADDR where) | |
192 | { | |
db91f502 YQ |
193 | if (is_64bit_tdesc ()) |
194 | { | |
195 | gdb_byte insn[aarch64_breakpoint_len]; | |
176eb98c | 196 | |
db91f502 YQ |
197 | (*the_target->read_memory) (where, (unsigned char *) &insn, |
198 | aarch64_breakpoint_len); | |
199 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) | |
200 | return 1; | |
176eb98c | 201 | |
db91f502 YQ |
202 | return 0; |
203 | } | |
204 | else | |
205 | return arm_breakpoint_at (where); | |
176eb98c MS |
206 | } |
207 | ||
176eb98c MS |
208 | static void |
209 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
210 | { | |
211 | int i; | |
212 | ||
213 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
214 | { | |
215 | state->dr_addr_bp[i] = 0; | |
216 | state->dr_ctrl_bp[i] = 0; | |
217 | state->dr_ref_count_bp[i] = 0; | |
218 | } | |
219 | ||
220 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
221 | { | |
222 | state->dr_addr_wp[i] = 0; | |
223 | state->dr_ctrl_wp[i] = 0; | |
224 | state->dr_ref_count_wp[i] = 0; | |
225 | } | |
226 | } | |
227 | ||
176eb98c MS |
228 | /* Return the pointer to the debug register state structure in the |
229 | current process' arch-specific data area. */ | |
230 | ||
db3cb7cb | 231 | struct aarch64_debug_reg_state * |
88e2cf7e | 232 | aarch64_get_debug_reg_state (pid_t pid) |
176eb98c | 233 | { |
88e2cf7e | 234 | struct process_info *proc = find_process_pid (pid); |
176eb98c | 235 | |
fe978cb0 | 236 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
237 | } |
238 | ||
421530db PL |
239 | /* Implementation of linux_target_ops method "supports_z_point_type". */ |
240 | ||
4ff0d3d8 PA |
241 | static int |
242 | aarch64_supports_z_point_type (char z_type) | |
243 | { | |
244 | switch (z_type) | |
245 | { | |
96c97461 | 246 | case Z_PACKET_SW_BP: |
4ff0d3d8 PA |
247 | case Z_PACKET_HW_BP: |
248 | case Z_PACKET_WRITE_WP: | |
249 | case Z_PACKET_READ_WP: | |
250 | case Z_PACKET_ACCESS_WP: | |
251 | return 1; | |
252 | default: | |
4ff0d3d8 PA |
253 | return 0; |
254 | } | |
255 | } | |
256 | ||
421530db | 257 | /* Implementation of linux_target_ops method "insert_point". |
176eb98c | 258 | |
421530db PL |
259 | It actually only records the info of the to-be-inserted bp/wp; |
260 | the actual insertion will happen when threads are resumed. */ | |
176eb98c MS |
261 | |
262 | static int | |
802e8e6d PA |
263 | aarch64_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
264 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
265 | { |
266 | int ret; | |
4ff0d3d8 | 267 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
268 | struct aarch64_debug_reg_state *state |
269 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 270 | |
c5e92cca | 271 | if (show_debug_regs) |
176eb98c MS |
272 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
273 | (unsigned long) addr, len); | |
274 | ||
802e8e6d PA |
275 | /* Determine the type from the raw breakpoint type. */ |
276 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
277 | |
278 | if (targ_type != hw_execute) | |
39edd165 YQ |
279 | { |
280 | if (aarch64_linux_region_ok_for_watchpoint (addr, len)) | |
281 | ret = aarch64_handle_watchpoint (targ_type, addr, len, | |
282 | 1 /* is_insert */, state); | |
283 | else | |
284 | ret = -1; | |
285 | } | |
176eb98c | 286 | else |
8d689ee5 YQ |
287 | { |
288 | if (len == 3) | |
289 | { | |
290 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
291 | instruction. Set it to 2 to correctly encode length bit | |
292 | mask in hardware/watchpoint control register. */ | |
293 | len = 2; | |
294 | } | |
295 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
296 | 1 /* is_insert */, state); | |
297 | } | |
176eb98c | 298 | |
60a191ed | 299 | if (show_debug_regs) |
88e2cf7e YQ |
300 | aarch64_show_debug_reg_state (state, "insert_point", addr, len, |
301 | targ_type); | |
176eb98c MS |
302 | |
303 | return ret; | |
304 | } | |
305 | ||
421530db | 306 | /* Implementation of linux_target_ops method "remove_point". |
176eb98c | 307 | |
421530db PL |
308 | It actually only records the info of the to-be-removed bp/wp, |
309 | the actual removal will be done when threads are resumed. */ | |
176eb98c MS |
310 | |
311 | static int | |
802e8e6d PA |
312 | aarch64_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
313 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
314 | { |
315 | int ret; | |
4ff0d3d8 | 316 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
317 | struct aarch64_debug_reg_state *state |
318 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 319 | |
c5e92cca | 320 | if (show_debug_regs) |
176eb98c MS |
321 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
322 | (unsigned long) addr, len); | |
323 | ||
802e8e6d PA |
324 | /* Determine the type from the raw breakpoint type. */ |
325 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
326 | |
327 | /* Set up state pointers. */ | |
328 | if (targ_type != hw_execute) | |
329 | ret = | |
c67ca4de YQ |
330 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
331 | state); | |
176eb98c | 332 | else |
8d689ee5 YQ |
333 | { |
334 | if (len == 3) | |
335 | { | |
336 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
337 | instruction. Set it to 2 to correctly encode length bit | |
338 | mask in hardware/watchpoint control register. */ | |
339 | len = 2; | |
340 | } | |
341 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
342 | 0 /* is_insert */, state); | |
343 | } | |
176eb98c | 344 | |
60a191ed | 345 | if (show_debug_regs) |
88e2cf7e YQ |
346 | aarch64_show_debug_reg_state (state, "remove_point", addr, len, |
347 | targ_type); | |
176eb98c MS |
348 | |
349 | return ret; | |
350 | } | |
351 | ||
421530db | 352 | /* Implementation of linux_target_ops method "stopped_data_address". */ |
176eb98c MS |
353 | |
354 | static CORE_ADDR | |
355 | aarch64_stopped_data_address (void) | |
356 | { | |
357 | siginfo_t siginfo; | |
358 | int pid, i; | |
359 | struct aarch64_debug_reg_state *state; | |
360 | ||
0bfdf32f | 361 | pid = lwpid_of (current_thread); |
176eb98c MS |
362 | |
363 | /* Get the siginfo. */ | |
364 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
365 | return (CORE_ADDR) 0; | |
366 | ||
367 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
368 | if (siginfo.si_signo != SIGTRAP | |
369 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
370 | return (CORE_ADDR) 0; | |
371 | ||
372 | /* Check if the address matches any watched address. */ | |
88e2cf7e | 373 | state = aarch64_get_debug_reg_state (pid_of (current_thread)); |
176eb98c MS |
374 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) |
375 | { | |
a3b60e45 JK |
376 | const unsigned int offset |
377 | = aarch64_watchpoint_offset (state->dr_ctrl_wp[i]); | |
176eb98c MS |
378 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); |
379 | const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr; | |
a3b60e45 JK |
380 | const CORE_ADDR addr_watch = state->dr_addr_wp[i] + offset; |
381 | const CORE_ADDR addr_watch_aligned = align_down (state->dr_addr_wp[i], 8); | |
382 | const CORE_ADDR addr_orig = state->dr_addr_orig_wp[i]; | |
383 | ||
176eb98c MS |
384 | if (state->dr_ref_count_wp[i] |
385 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
a3b60e45 | 386 | && addr_trap >= addr_watch_aligned |
176eb98c | 387 | && addr_trap < addr_watch + len) |
a3b60e45 JK |
388 | { |
389 | /* ADDR_TRAP reports the first address of the memory range | |
390 | accessed by the CPU, regardless of what was the memory | |
391 | range watched. Thus, a large CPU access that straddles | |
392 | the ADDR_WATCH..ADDR_WATCH+LEN range may result in an | |
393 | ADDR_TRAP that is lower than the | |
394 | ADDR_WATCH..ADDR_WATCH+LEN range. E.g.: | |
395 | ||
396 | addr: | 4 | 5 | 6 | 7 | 8 | | |
397 | |---- range watched ----| | |
398 | |----------- range accessed ------------| | |
399 | ||
400 | In this case, ADDR_TRAP will be 4. | |
401 | ||
402 | To match a watchpoint known to GDB core, we must never | |
403 | report *ADDR_P outside of any ADDR_WATCH..ADDR_WATCH+LEN | |
404 | range. ADDR_WATCH <= ADDR_TRAP < ADDR_ORIG is a false | |
405 | positive on kernels older than 4.10. See PR | |
406 | external/20207. */ | |
407 | return addr_orig; | |
408 | } | |
176eb98c MS |
409 | } |
410 | ||
411 | return (CORE_ADDR) 0; | |
412 | } | |
413 | ||
421530db | 414 | /* Implementation of linux_target_ops method "stopped_by_watchpoint". */ |
176eb98c MS |
415 | |
416 | static int | |
417 | aarch64_stopped_by_watchpoint (void) | |
418 | { | |
419 | if (aarch64_stopped_data_address () != 0) | |
420 | return 1; | |
421 | else | |
422 | return 0; | |
423 | } | |
424 | ||
425 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
426 | ||
427 | ps_err_e | |
754653a7 | 428 | ps_get_thread_area (struct ps_prochandle *ph, |
176eb98c MS |
429 | lwpid_t lwpid, int idx, void **base) |
430 | { | |
a0cc84cd YQ |
431 | return aarch64_ps_get_thread_area (ph, lwpid, idx, base, |
432 | is_64bit_tdesc ()); | |
176eb98c MS |
433 | } |
434 | ||
ade90bde YQ |
435 | /* Implementation of linux_target_ops method "siginfo_fixup". */ |
436 | ||
437 | static int | |
8adce034 | 438 | aarch64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction) |
ade90bde YQ |
439 | { |
440 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ | |
441 | if (!is_64bit_tdesc ()) | |
442 | { | |
443 | if (direction == 0) | |
444 | aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, | |
445 | native); | |
446 | else | |
447 | aarch64_siginfo_from_compat_siginfo (native, | |
448 | (struct compat_siginfo *) inf); | |
449 | ||
450 | return 1; | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
04ec7890 | 456 | /* Implementation of linux_target_ops method "new_process". */ |
176eb98c MS |
457 | |
458 | static struct arch_process_info * | |
459 | aarch64_linux_new_process (void) | |
460 | { | |
8d749320 | 461 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
176eb98c MS |
462 | |
463 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
464 | ||
465 | return info; | |
466 | } | |
467 | ||
04ec7890 SM |
468 | /* Implementation of linux_target_ops method "delete_process". */ |
469 | ||
470 | static void | |
471 | aarch64_linux_delete_process (struct arch_process_info *info) | |
472 | { | |
473 | xfree (info); | |
474 | } | |
475 | ||
421530db PL |
476 | /* Implementation of linux_target_ops method "linux_new_fork". */ |
477 | ||
3a8a0396 DB |
478 | static void |
479 | aarch64_linux_new_fork (struct process_info *parent, | |
480 | struct process_info *child) | |
481 | { | |
482 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
483 | gdb_assert (parent->priv != NULL |
484 | && parent->priv->arch_private != NULL); | |
485 | gdb_assert (child->priv != NULL | |
486 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
487 | |
488 | /* Linux kernel before 2.6.33 commit | |
489 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
490 | will inherit hardware debug registers from parent | |
491 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
492 | zeroed debug registers. | |
493 | ||
494 | GDB core assumes the child inherits the watchpoints/hw | |
495 | breakpoints of the parent, and will remove them all from the | |
496 | forked off process. Copy the debug registers mirrors into the | |
497 | new process so that all breakpoints and watchpoints can be | |
498 | removed together. The debug registers mirror will become zeroed | |
499 | in the end before detaching the forked off process, thus making | |
500 | this compatible with older Linux kernels too. */ | |
501 | ||
61a7418c | 502 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
503 | } |
504 | ||
ee4fbcfa AH |
505 | /* Matches HWCAP_PACA in kernel header arch/arm64/include/uapi/asm/hwcap.h. */ |
506 | #define AARCH64_HWCAP_PACA (1 << 30) | |
507 | ||
d6d7ce56 | 508 | /* Implementation of linux_target_ops method "arch_setup". */ |
3b53ae99 | 509 | |
d6d7ce56 AH |
510 | static void |
511 | aarch64_arch_setup (void) | |
3b53ae99 YQ |
512 | { |
513 | unsigned int machine; | |
514 | int is_elf64; | |
515 | int tid; | |
516 | ||
517 | tid = lwpid_of (current_thread); | |
518 | ||
519 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
520 | ||
521 | if (is_elf64) | |
fefa175e AH |
522 | { |
523 | uint64_t vq = aarch64_sve_get_vq (tid); | |
974c89e0 AH |
524 | unsigned long hwcap = linux_get_hwcap (8); |
525 | bool pauth_p = hwcap & AARCH64_HWCAP_PACA; | |
ee4fbcfa AH |
526 | |
527 | current_process ()->tdesc = aarch64_linux_read_description (vq, pauth_p); | |
fefa175e | 528 | } |
3b53ae99 | 529 | else |
d6d7ce56 | 530 | current_process ()->tdesc = tdesc_arm_with_neon; |
176eb98c | 531 | |
af1b22f3 | 532 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
533 | } |
534 | ||
02895270 AH |
535 | /* Wrapper for aarch64_sve_regs_copy_to_reg_buf. */ |
536 | ||
537 | static void | |
538 | aarch64_sve_regs_copy_to_regcache (struct regcache *regcache, const void *buf) | |
539 | { | |
540 | return aarch64_sve_regs_copy_to_reg_buf (regcache, buf); | |
541 | } | |
542 | ||
543 | /* Wrapper for aarch64_sve_regs_copy_from_reg_buf. */ | |
544 | ||
545 | static void | |
546 | aarch64_sve_regs_copy_from_regcache (struct regcache *regcache, void *buf) | |
547 | { | |
548 | return aarch64_sve_regs_copy_from_reg_buf (regcache, buf); | |
549 | } | |
550 | ||
3aee8918 | 551 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
552 | { |
553 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
554 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
555 | aarch64_fill_gregset, aarch64_store_gregset }, | |
556 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
557 | sizeof (struct user_fpsimd_state), FP_REGS, | |
558 | aarch64_fill_fpregset, aarch64_store_fpregset | |
559 | }, | |
1ef53e6b AH |
560 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
561 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
562 | NULL, aarch64_store_pauthregset }, | |
50bc912a | 563 | NULL_REGSET |
176eb98c MS |
564 | }; |
565 | ||
3aee8918 PA |
566 | static struct regsets_info aarch64_regsets_info = |
567 | { | |
568 | aarch64_regsets, /* regsets */ | |
569 | 0, /* num_regsets */ | |
570 | NULL, /* disabled_regsets */ | |
571 | }; | |
572 | ||
3b53ae99 | 573 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
574 | { |
575 | NULL, /* regset_bitmap */ | |
c2d65f38 | 576 | NULL, /* usrregs */ |
3aee8918 PA |
577 | &aarch64_regsets_info, |
578 | }; | |
579 | ||
02895270 AH |
580 | static struct regset_info aarch64_sve_regsets[] = |
581 | { | |
582 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
583 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
584 | aarch64_fill_gregset, aarch64_store_gregset }, | |
585 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_SVE, | |
586 | SVE_PT_SIZE (AARCH64_MAX_SVE_VQ, SVE_PT_REGS_SVE), EXTENDED_REGS, | |
587 | aarch64_sve_regs_copy_from_regcache, aarch64_sve_regs_copy_to_regcache | |
588 | }, | |
1ef53e6b AH |
589 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
590 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
591 | NULL, aarch64_store_pauthregset }, | |
02895270 AH |
592 | NULL_REGSET |
593 | }; | |
594 | ||
595 | static struct regsets_info aarch64_sve_regsets_info = | |
596 | { | |
597 | aarch64_sve_regsets, /* regsets. */ | |
598 | 0, /* num_regsets. */ | |
599 | NULL, /* disabled_regsets. */ | |
600 | }; | |
601 | ||
602 | static struct regs_info regs_info_aarch64_sve = | |
603 | { | |
604 | NULL, /* regset_bitmap. */ | |
605 | NULL, /* usrregs. */ | |
606 | &aarch64_sve_regsets_info, | |
607 | }; | |
608 | ||
421530db PL |
609 | /* Implementation of linux_target_ops method "regs_info". */ |
610 | ||
3aee8918 PA |
611 | static const struct regs_info * |
612 | aarch64_regs_info (void) | |
613 | { | |
02895270 | 614 | if (!is_64bit_tdesc ()) |
3b53ae99 | 615 | return ®s_info_aarch32; |
02895270 AH |
616 | |
617 | if (is_sve_tdesc ()) | |
618 | return ®s_info_aarch64_sve; | |
619 | ||
620 | return ®s_info_aarch64; | |
3aee8918 PA |
621 | } |
622 | ||
7671bf47 PL |
623 | /* Implementation of linux_target_ops method "supports_tracepoints". */ |
624 | ||
625 | static int | |
626 | aarch64_supports_tracepoints (void) | |
627 | { | |
524b57e6 YQ |
628 | if (current_thread == NULL) |
629 | return 1; | |
630 | else | |
631 | { | |
632 | /* We don't support tracepoints on aarch32 now. */ | |
633 | return is_64bit_tdesc (); | |
634 | } | |
7671bf47 PL |
635 | } |
636 | ||
bb903df0 PL |
637 | /* Implementation of linux_target_ops method "get_thread_area". */ |
638 | ||
639 | static int | |
640 | aarch64_get_thread_area (int lwpid, CORE_ADDR *addrp) | |
641 | { | |
642 | struct iovec iovec; | |
643 | uint64_t reg; | |
644 | ||
645 | iovec.iov_base = ® | |
646 | iovec.iov_len = sizeof (reg); | |
647 | ||
648 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
649 | return -1; | |
650 | ||
651 | *addrp = reg; | |
652 | ||
653 | return 0; | |
654 | } | |
655 | ||
061fc021 YQ |
656 | /* Implementation of linux_target_ops method "get_syscall_trapinfo". */ |
657 | ||
658 | static void | |
659 | aarch64_get_syscall_trapinfo (struct regcache *regcache, int *sysno) | |
660 | { | |
661 | int use_64bit = register_size (regcache->tdesc, 0) == 8; | |
662 | ||
663 | if (use_64bit) | |
664 | { | |
665 | long l_sysno; | |
666 | ||
667 | collect_register_by_name (regcache, "x8", &l_sysno); | |
668 | *sysno = (int) l_sysno; | |
669 | } | |
670 | else | |
671 | collect_register_by_name (regcache, "r7", sysno); | |
672 | } | |
673 | ||
afbe19f8 PL |
674 | /* List of condition codes that we need. */ |
675 | ||
676 | enum aarch64_condition_codes | |
677 | { | |
678 | EQ = 0x0, | |
679 | NE = 0x1, | |
680 | LO = 0x3, | |
681 | GE = 0xa, | |
682 | LT = 0xb, | |
683 | GT = 0xc, | |
684 | LE = 0xd, | |
bb903df0 PL |
685 | }; |
686 | ||
6c1c9a8b YQ |
687 | enum aarch64_operand_type |
688 | { | |
689 | OPERAND_IMMEDIATE, | |
690 | OPERAND_REGISTER, | |
691 | }; | |
692 | ||
bb903df0 PL |
693 | /* Representation of an operand. At this time, it only supports register |
694 | and immediate types. */ | |
695 | ||
696 | struct aarch64_operand | |
697 | { | |
698 | /* Type of the operand. */ | |
6c1c9a8b YQ |
699 | enum aarch64_operand_type type; |
700 | ||
bb903df0 PL |
701 | /* Value of the operand according to the type. */ |
702 | union | |
703 | { | |
704 | uint32_t imm; | |
705 | struct aarch64_register reg; | |
706 | }; | |
707 | }; | |
708 | ||
709 | /* List of registers that we are currently using, we can add more here as | |
710 | we need to use them. */ | |
711 | ||
712 | /* General purpose scratch registers (64 bit). */ | |
713 | static const struct aarch64_register x0 = { 0, 1 }; | |
714 | static const struct aarch64_register x1 = { 1, 1 }; | |
715 | static const struct aarch64_register x2 = { 2, 1 }; | |
716 | static const struct aarch64_register x3 = { 3, 1 }; | |
717 | static const struct aarch64_register x4 = { 4, 1 }; | |
718 | ||
719 | /* General purpose scratch registers (32 bit). */ | |
afbe19f8 | 720 | static const struct aarch64_register w0 = { 0, 0 }; |
bb903df0 PL |
721 | static const struct aarch64_register w2 = { 2, 0 }; |
722 | ||
723 | /* Intra-procedure scratch registers. */ | |
724 | static const struct aarch64_register ip0 = { 16, 1 }; | |
725 | ||
726 | /* Special purpose registers. */ | |
afbe19f8 PL |
727 | static const struct aarch64_register fp = { 29, 1 }; |
728 | static const struct aarch64_register lr = { 30, 1 }; | |
bb903df0 PL |
729 | static const struct aarch64_register sp = { 31, 1 }; |
730 | static const struct aarch64_register xzr = { 31, 1 }; | |
731 | ||
732 | /* Dynamically allocate a new register. If we know the register | |
733 | statically, we should make it a global as above instead of using this | |
734 | helper function. */ | |
735 | ||
736 | static struct aarch64_register | |
737 | aarch64_register (unsigned num, int is64) | |
738 | { | |
739 | return (struct aarch64_register) { num, is64 }; | |
740 | } | |
741 | ||
742 | /* Helper function to create a register operand, for instructions with | |
743 | different types of operands. | |
744 | ||
745 | For example: | |
746 | p += emit_mov (p, x0, register_operand (x1)); */ | |
747 | ||
748 | static struct aarch64_operand | |
749 | register_operand (struct aarch64_register reg) | |
750 | { | |
751 | struct aarch64_operand operand; | |
752 | ||
753 | operand.type = OPERAND_REGISTER; | |
754 | operand.reg = reg; | |
755 | ||
756 | return operand; | |
757 | } | |
758 | ||
759 | /* Helper function to create an immediate operand, for instructions with | |
760 | different types of operands. | |
761 | ||
762 | For example: | |
763 | p += emit_mov (p, x0, immediate_operand (12)); */ | |
764 | ||
765 | static struct aarch64_operand | |
766 | immediate_operand (uint32_t imm) | |
767 | { | |
768 | struct aarch64_operand operand; | |
769 | ||
770 | operand.type = OPERAND_IMMEDIATE; | |
771 | operand.imm = imm; | |
772 | ||
773 | return operand; | |
774 | } | |
775 | ||
bb903df0 PL |
776 | /* Helper function to create an offset memory operand. |
777 | ||
778 | For example: | |
779 | p += emit_ldr (p, x0, sp, offset_memory_operand (16)); */ | |
780 | ||
781 | static struct aarch64_memory_operand | |
782 | offset_memory_operand (int32_t offset) | |
783 | { | |
784 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_OFFSET, offset }; | |
785 | } | |
786 | ||
787 | /* Helper function to create a pre-index memory operand. | |
788 | ||
789 | For example: | |
790 | p += emit_ldr (p, x0, sp, preindex_memory_operand (16)); */ | |
791 | ||
792 | static struct aarch64_memory_operand | |
793 | preindex_memory_operand (int32_t index) | |
794 | { | |
795 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_PREINDEX, index }; | |
796 | } | |
797 | ||
afbe19f8 PL |
798 | /* Helper function to create a post-index memory operand. |
799 | ||
800 | For example: | |
801 | p += emit_ldr (p, x0, sp, postindex_memory_operand (16)); */ | |
802 | ||
803 | static struct aarch64_memory_operand | |
804 | postindex_memory_operand (int32_t index) | |
805 | { | |
806 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_POSTINDEX, index }; | |
807 | } | |
808 | ||
bb903df0 PL |
809 | /* System control registers. These special registers can be written and |
810 | read with the MRS and MSR instructions. | |
811 | ||
812 | - NZCV: Condition flags. GDB refers to this register under the CPSR | |
813 | name. | |
814 | - FPSR: Floating-point status register. | |
815 | - FPCR: Floating-point control registers. | |
816 | - TPIDR_EL0: Software thread ID register. */ | |
817 | ||
818 | enum aarch64_system_control_registers | |
819 | { | |
820 | /* op0 op1 crn crm op2 */ | |
821 | NZCV = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x2 << 3) | 0x0, | |
822 | FPSR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x1, | |
823 | FPCR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x0, | |
824 | TPIDR_EL0 = (0x1 << 14) | (0x3 << 11) | (0xd << 7) | (0x0 << 3) | 0x2 | |
825 | }; | |
826 | ||
bb903df0 PL |
827 | /* Write a BLR instruction into *BUF. |
828 | ||
829 | BLR rn | |
830 | ||
831 | RN is the register to branch to. */ | |
832 | ||
833 | static int | |
834 | emit_blr (uint32_t *buf, struct aarch64_register rn) | |
835 | { | |
e1c587c3 | 836 | return aarch64_emit_insn (buf, BLR | ENCODE (rn.num, 5, 5)); |
bb903df0 PL |
837 | } |
838 | ||
afbe19f8 | 839 | /* Write a RET instruction into *BUF. |
bb903df0 | 840 | |
afbe19f8 | 841 | RET xn |
bb903df0 | 842 | |
afbe19f8 | 843 | RN is the register to branch to. */ |
bb903df0 PL |
844 | |
845 | static int | |
afbe19f8 PL |
846 | emit_ret (uint32_t *buf, struct aarch64_register rn) |
847 | { | |
e1c587c3 | 848 | return aarch64_emit_insn (buf, RET | ENCODE (rn.num, 5, 5)); |
afbe19f8 PL |
849 | } |
850 | ||
851 | static int | |
852 | emit_load_store_pair (uint32_t *buf, enum aarch64_opcodes opcode, | |
853 | struct aarch64_register rt, | |
854 | struct aarch64_register rt2, | |
855 | struct aarch64_register rn, | |
856 | struct aarch64_memory_operand operand) | |
bb903df0 PL |
857 | { |
858 | uint32_t opc; | |
859 | uint32_t pre_index; | |
860 | uint32_t write_back; | |
861 | ||
862 | if (rt.is64) | |
863 | opc = ENCODE (2, 2, 30); | |
864 | else | |
865 | opc = ENCODE (0, 2, 30); | |
866 | ||
867 | switch (operand.type) | |
868 | { | |
869 | case MEMORY_OPERAND_OFFSET: | |
870 | { | |
871 | pre_index = ENCODE (1, 1, 24); | |
872 | write_back = ENCODE (0, 1, 23); | |
873 | break; | |
874 | } | |
afbe19f8 PL |
875 | case MEMORY_OPERAND_POSTINDEX: |
876 | { | |
877 | pre_index = ENCODE (0, 1, 24); | |
878 | write_back = ENCODE (1, 1, 23); | |
879 | break; | |
880 | } | |
bb903df0 PL |
881 | case MEMORY_OPERAND_PREINDEX: |
882 | { | |
883 | pre_index = ENCODE (1, 1, 24); | |
884 | write_back = ENCODE (1, 1, 23); | |
885 | break; | |
886 | } | |
887 | default: | |
888 | return 0; | |
889 | } | |
890 | ||
e1c587c3 YQ |
891 | return aarch64_emit_insn (buf, opcode | opc | pre_index | write_back |
892 | | ENCODE (operand.index >> 3, 7, 15) | |
893 | | ENCODE (rt2.num, 5, 10) | |
894 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
895 | } |
896 | ||
afbe19f8 PL |
897 | /* Write a STP instruction into *BUF. |
898 | ||
899 | STP rt, rt2, [rn, #offset] | |
900 | STP rt, rt2, [rn, #index]! | |
901 | STP rt, rt2, [rn], #index | |
902 | ||
903 | RT and RT2 are the registers to store. | |
904 | RN is the base address register. | |
905 | OFFSET is the immediate to add to the base address. It is limited to a | |
906 | -512 .. 504 range (7 bits << 3). */ | |
907 | ||
908 | static int | |
909 | emit_stp (uint32_t *buf, struct aarch64_register rt, | |
910 | struct aarch64_register rt2, struct aarch64_register rn, | |
911 | struct aarch64_memory_operand operand) | |
912 | { | |
913 | return emit_load_store_pair (buf, STP, rt, rt2, rn, operand); | |
914 | } | |
915 | ||
916 | /* Write a LDP instruction into *BUF. | |
917 | ||
918 | LDP rt, rt2, [rn, #offset] | |
919 | LDP rt, rt2, [rn, #index]! | |
920 | LDP rt, rt2, [rn], #index | |
921 | ||
922 | RT and RT2 are the registers to store. | |
923 | RN is the base address register. | |
924 | OFFSET is the immediate to add to the base address. It is limited to a | |
925 | -512 .. 504 range (7 bits << 3). */ | |
926 | ||
927 | static int | |
928 | emit_ldp (uint32_t *buf, struct aarch64_register rt, | |
929 | struct aarch64_register rt2, struct aarch64_register rn, | |
930 | struct aarch64_memory_operand operand) | |
931 | { | |
932 | return emit_load_store_pair (buf, LDP, rt, rt2, rn, operand); | |
933 | } | |
934 | ||
bb903df0 PL |
935 | /* Write a LDP (SIMD&VFP) instruction using Q registers into *BUF. |
936 | ||
937 | LDP qt, qt2, [rn, #offset] | |
938 | ||
939 | RT and RT2 are the Q registers to store. | |
940 | RN is the base address register. | |
941 | OFFSET is the immediate to add to the base address. It is limited to | |
942 | -1024 .. 1008 range (7 bits << 4). */ | |
943 | ||
944 | static int | |
945 | emit_ldp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
946 | struct aarch64_register rn, int32_t offset) | |
947 | { | |
948 | uint32_t opc = ENCODE (2, 2, 30); | |
949 | uint32_t pre_index = ENCODE (1, 1, 24); | |
950 | ||
e1c587c3 YQ |
951 | return aarch64_emit_insn (buf, LDP_SIMD_VFP | opc | pre_index |
952 | | ENCODE (offset >> 4, 7, 15) | |
953 | | ENCODE (rt2, 5, 10) | |
954 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
955 | } |
956 | ||
957 | /* Write a STP (SIMD&VFP) instruction using Q registers into *BUF. | |
958 | ||
959 | STP qt, qt2, [rn, #offset] | |
960 | ||
961 | RT and RT2 are the Q registers to store. | |
962 | RN is the base address register. | |
963 | OFFSET is the immediate to add to the base address. It is limited to | |
964 | -1024 .. 1008 range (7 bits << 4). */ | |
965 | ||
966 | static int | |
967 | emit_stp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
968 | struct aarch64_register rn, int32_t offset) | |
969 | { | |
970 | uint32_t opc = ENCODE (2, 2, 30); | |
971 | uint32_t pre_index = ENCODE (1, 1, 24); | |
972 | ||
e1c587c3 | 973 | return aarch64_emit_insn (buf, STP_SIMD_VFP | opc | pre_index |
b6542f81 YQ |
974 | | ENCODE (offset >> 4, 7, 15) |
975 | | ENCODE (rt2, 5, 10) | |
976 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
977 | } |
978 | ||
afbe19f8 PL |
979 | /* Write a LDRH instruction into *BUF. |
980 | ||
981 | LDRH wt, [xn, #offset] | |
982 | LDRH wt, [xn, #index]! | |
983 | LDRH wt, [xn], #index | |
984 | ||
985 | RT is the register to store. | |
986 | RN is the base address register. | |
987 | OFFSET is the immediate to add to the base address. It is limited to | |
988 | 0 .. 32760 range (12 bits << 3). */ | |
989 | ||
990 | static int | |
991 | emit_ldrh (uint32_t *buf, struct aarch64_register rt, | |
992 | struct aarch64_register rn, | |
993 | struct aarch64_memory_operand operand) | |
994 | { | |
1c2e1515 | 995 | return aarch64_emit_load_store (buf, 1, LDR, rt, rn, operand); |
afbe19f8 PL |
996 | } |
997 | ||
998 | /* Write a LDRB instruction into *BUF. | |
999 | ||
1000 | LDRB wt, [xn, #offset] | |
1001 | LDRB wt, [xn, #index]! | |
1002 | LDRB wt, [xn], #index | |
1003 | ||
1004 | RT is the register to store. | |
1005 | RN is the base address register. | |
1006 | OFFSET is the immediate to add to the base address. It is limited to | |
1007 | 0 .. 32760 range (12 bits << 3). */ | |
1008 | ||
1009 | static int | |
1010 | emit_ldrb (uint32_t *buf, struct aarch64_register rt, | |
1011 | struct aarch64_register rn, | |
1012 | struct aarch64_memory_operand operand) | |
1013 | { | |
1c2e1515 | 1014 | return aarch64_emit_load_store (buf, 0, LDR, rt, rn, operand); |
afbe19f8 PL |
1015 | } |
1016 | ||
bb903df0 | 1017 | |
bb903df0 PL |
1018 | |
1019 | /* Write a STR instruction into *BUF. | |
1020 | ||
1021 | STR rt, [rn, #offset] | |
1022 | STR rt, [rn, #index]! | |
afbe19f8 | 1023 | STR rt, [rn], #index |
bb903df0 PL |
1024 | |
1025 | RT is the register to store. | |
1026 | RN is the base address register. | |
1027 | OFFSET is the immediate to add to the base address. It is limited to | |
1028 | 0 .. 32760 range (12 bits << 3). */ | |
1029 | ||
1030 | static int | |
1031 | emit_str (uint32_t *buf, struct aarch64_register rt, | |
1032 | struct aarch64_register rn, | |
1033 | struct aarch64_memory_operand operand) | |
1034 | { | |
1c2e1515 | 1035 | return aarch64_emit_load_store (buf, rt.is64 ? 3 : 2, STR, rt, rn, operand); |
bb903df0 PL |
1036 | } |
1037 | ||
1038 | /* Helper function emitting an exclusive load or store instruction. */ | |
1039 | ||
1040 | static int | |
1041 | emit_load_store_exclusive (uint32_t *buf, uint32_t size, | |
1042 | enum aarch64_opcodes opcode, | |
1043 | struct aarch64_register rs, | |
1044 | struct aarch64_register rt, | |
1045 | struct aarch64_register rt2, | |
1046 | struct aarch64_register rn) | |
1047 | { | |
e1c587c3 YQ |
1048 | return aarch64_emit_insn (buf, opcode | ENCODE (size, 2, 30) |
1049 | | ENCODE (rs.num, 5, 16) | ENCODE (rt2.num, 5, 10) | |
1050 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1051 | } |
1052 | ||
1053 | /* Write a LAXR instruction into *BUF. | |
1054 | ||
1055 | LDAXR rt, [xn] | |
1056 | ||
1057 | RT is the destination register. | |
1058 | RN is the base address register. */ | |
1059 | ||
1060 | static int | |
1061 | emit_ldaxr (uint32_t *buf, struct aarch64_register rt, | |
1062 | struct aarch64_register rn) | |
1063 | { | |
1064 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, LDAXR, xzr, rt, | |
1065 | xzr, rn); | |
1066 | } | |
1067 | ||
1068 | /* Write a STXR instruction into *BUF. | |
1069 | ||
1070 | STXR ws, rt, [xn] | |
1071 | ||
1072 | RS is the result register, it indicates if the store succeeded or not. | |
1073 | RT is the destination register. | |
1074 | RN is the base address register. */ | |
1075 | ||
1076 | static int | |
1077 | emit_stxr (uint32_t *buf, struct aarch64_register rs, | |
1078 | struct aarch64_register rt, struct aarch64_register rn) | |
1079 | { | |
1080 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STXR, rs, rt, | |
1081 | xzr, rn); | |
1082 | } | |
1083 | ||
1084 | /* Write a STLR instruction into *BUF. | |
1085 | ||
1086 | STLR rt, [xn] | |
1087 | ||
1088 | RT is the register to store. | |
1089 | RN is the base address register. */ | |
1090 | ||
1091 | static int | |
1092 | emit_stlr (uint32_t *buf, struct aarch64_register rt, | |
1093 | struct aarch64_register rn) | |
1094 | { | |
1095 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STLR, xzr, rt, | |
1096 | xzr, rn); | |
1097 | } | |
1098 | ||
1099 | /* Helper function for data processing instructions with register sources. */ | |
1100 | ||
1101 | static int | |
231c0592 | 1102 | emit_data_processing_reg (uint32_t *buf, uint32_t opcode, |
bb903df0 PL |
1103 | struct aarch64_register rd, |
1104 | struct aarch64_register rn, | |
1105 | struct aarch64_register rm) | |
1106 | { | |
1107 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1108 | ||
e1c587c3 YQ |
1109 | return aarch64_emit_insn (buf, opcode | size | ENCODE (rm.num, 5, 16) |
1110 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1111 | } |
1112 | ||
1113 | /* Helper function for data processing instructions taking either a register | |
1114 | or an immediate. */ | |
1115 | ||
1116 | static int | |
1117 | emit_data_processing (uint32_t *buf, enum aarch64_opcodes opcode, | |
1118 | struct aarch64_register rd, | |
1119 | struct aarch64_register rn, | |
1120 | struct aarch64_operand operand) | |
1121 | { | |
1122 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1123 | /* The opcode is different for register and immediate source operands. */ | |
1124 | uint32_t operand_opcode; | |
1125 | ||
1126 | if (operand.type == OPERAND_IMMEDIATE) | |
1127 | { | |
1128 | /* xxx1 000x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1129 | operand_opcode = ENCODE (8, 4, 25); | |
1130 | ||
e1c587c3 YQ |
1131 | return aarch64_emit_insn (buf, opcode | operand_opcode | size |
1132 | | ENCODE (operand.imm, 12, 10) | |
1133 | | ENCODE (rn.num, 5, 5) | |
1134 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1135 | } |
1136 | else | |
1137 | { | |
1138 | /* xxx0 101x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1139 | operand_opcode = ENCODE (5, 4, 25); | |
1140 | ||
1141 | return emit_data_processing_reg (buf, opcode | operand_opcode, rd, | |
1142 | rn, operand.reg); | |
1143 | } | |
1144 | } | |
1145 | ||
1146 | /* Write an ADD instruction into *BUF. | |
1147 | ||
1148 | ADD rd, rn, #imm | |
1149 | ADD rd, rn, rm | |
1150 | ||
1151 | This function handles both an immediate and register add. | |
1152 | ||
1153 | RD is the destination register. | |
1154 | RN is the input register. | |
1155 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1156 | OPERAND_REGISTER. */ | |
1157 | ||
1158 | static int | |
1159 | emit_add (uint32_t *buf, struct aarch64_register rd, | |
1160 | struct aarch64_register rn, struct aarch64_operand operand) | |
1161 | { | |
1162 | return emit_data_processing (buf, ADD, rd, rn, operand); | |
1163 | } | |
1164 | ||
1165 | /* Write a SUB instruction into *BUF. | |
1166 | ||
1167 | SUB rd, rn, #imm | |
1168 | SUB rd, rn, rm | |
1169 | ||
1170 | This function handles both an immediate and register sub. | |
1171 | ||
1172 | RD is the destination register. | |
1173 | RN is the input register. | |
1174 | IMM is the immediate to substract to RN. */ | |
1175 | ||
1176 | static int | |
1177 | emit_sub (uint32_t *buf, struct aarch64_register rd, | |
1178 | struct aarch64_register rn, struct aarch64_operand operand) | |
1179 | { | |
1180 | return emit_data_processing (buf, SUB, rd, rn, operand); | |
1181 | } | |
1182 | ||
1183 | /* Write a MOV instruction into *BUF. | |
1184 | ||
1185 | MOV rd, #imm | |
1186 | MOV rd, rm | |
1187 | ||
1188 | This function handles both a wide immediate move and a register move, | |
1189 | with the condition that the source register is not xzr. xzr and the | |
1190 | stack pointer share the same encoding and this function only supports | |
1191 | the stack pointer. | |
1192 | ||
1193 | RD is the destination register. | |
1194 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1195 | OPERAND_REGISTER. */ | |
1196 | ||
1197 | static int | |
1198 | emit_mov (uint32_t *buf, struct aarch64_register rd, | |
1199 | struct aarch64_operand operand) | |
1200 | { | |
1201 | if (operand.type == OPERAND_IMMEDIATE) | |
1202 | { | |
1203 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1204 | /* Do not shift the immediate. */ | |
1205 | uint32_t shift = ENCODE (0, 2, 21); | |
1206 | ||
e1c587c3 YQ |
1207 | return aarch64_emit_insn (buf, MOV | size | shift |
1208 | | ENCODE (operand.imm, 16, 5) | |
1209 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1210 | } |
1211 | else | |
1212 | return emit_add (buf, rd, operand.reg, immediate_operand (0)); | |
1213 | } | |
1214 | ||
1215 | /* Write a MOVK instruction into *BUF. | |
1216 | ||
1217 | MOVK rd, #imm, lsl #shift | |
1218 | ||
1219 | RD is the destination register. | |
1220 | IMM is the immediate. | |
1221 | SHIFT is the logical shift left to apply to IMM. */ | |
1222 | ||
1223 | static int | |
7781c06f YQ |
1224 | emit_movk (uint32_t *buf, struct aarch64_register rd, uint32_t imm, |
1225 | unsigned shift) | |
bb903df0 PL |
1226 | { |
1227 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1228 | ||
e1c587c3 YQ |
1229 | return aarch64_emit_insn (buf, MOVK | size | ENCODE (shift, 2, 21) | |
1230 | ENCODE (imm, 16, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1231 | } |
1232 | ||
1233 | /* Write instructions into *BUF in order to move ADDR into a register. | |
1234 | ADDR can be a 64-bit value. | |
1235 | ||
1236 | This function will emit a series of MOV and MOVK instructions, such as: | |
1237 | ||
1238 | MOV xd, #(addr) | |
1239 | MOVK xd, #(addr >> 16), lsl #16 | |
1240 | MOVK xd, #(addr >> 32), lsl #32 | |
1241 | MOVK xd, #(addr >> 48), lsl #48 */ | |
1242 | ||
1243 | static int | |
1244 | emit_mov_addr (uint32_t *buf, struct aarch64_register rd, CORE_ADDR addr) | |
1245 | { | |
1246 | uint32_t *p = buf; | |
1247 | ||
1248 | /* The MOV (wide immediate) instruction clears to top bits of the | |
1249 | register. */ | |
1250 | p += emit_mov (p, rd, immediate_operand (addr & 0xffff)); | |
1251 | ||
1252 | if ((addr >> 16) != 0) | |
1253 | p += emit_movk (p, rd, (addr >> 16) & 0xffff, 1); | |
1254 | else | |
1255 | return p - buf; | |
1256 | ||
1257 | if ((addr >> 32) != 0) | |
1258 | p += emit_movk (p, rd, (addr >> 32) & 0xffff, 2); | |
1259 | else | |
1260 | return p - buf; | |
1261 | ||
1262 | if ((addr >> 48) != 0) | |
1263 | p += emit_movk (p, rd, (addr >> 48) & 0xffff, 3); | |
1264 | ||
1265 | return p - buf; | |
1266 | } | |
1267 | ||
afbe19f8 PL |
1268 | /* Write a SUBS instruction into *BUF. |
1269 | ||
1270 | SUBS rd, rn, rm | |
1271 | ||
1272 | This instruction update the condition flags. | |
1273 | ||
1274 | RD is the destination register. | |
1275 | RN and RM are the source registers. */ | |
1276 | ||
1277 | static int | |
1278 | emit_subs (uint32_t *buf, struct aarch64_register rd, | |
1279 | struct aarch64_register rn, struct aarch64_operand operand) | |
1280 | { | |
1281 | return emit_data_processing (buf, SUBS, rd, rn, operand); | |
1282 | } | |
1283 | ||
1284 | /* Write a CMP instruction into *BUF. | |
1285 | ||
1286 | CMP rn, rm | |
1287 | ||
1288 | This instruction is an alias of SUBS xzr, rn, rm. | |
1289 | ||
1290 | RN and RM are the registers to compare. */ | |
1291 | ||
1292 | static int | |
1293 | emit_cmp (uint32_t *buf, struct aarch64_register rn, | |
1294 | struct aarch64_operand operand) | |
1295 | { | |
1296 | return emit_subs (buf, xzr, rn, operand); | |
1297 | } | |
1298 | ||
1299 | /* Write a AND instruction into *BUF. | |
1300 | ||
1301 | AND rd, rn, rm | |
1302 | ||
1303 | RD is the destination register. | |
1304 | RN and RM are the source registers. */ | |
1305 | ||
1306 | static int | |
1307 | emit_and (uint32_t *buf, struct aarch64_register rd, | |
1308 | struct aarch64_register rn, struct aarch64_register rm) | |
1309 | { | |
1310 | return emit_data_processing_reg (buf, AND, rd, rn, rm); | |
1311 | } | |
1312 | ||
1313 | /* Write a ORR instruction into *BUF. | |
1314 | ||
1315 | ORR rd, rn, rm | |
1316 | ||
1317 | RD is the destination register. | |
1318 | RN and RM are the source registers. */ | |
1319 | ||
1320 | static int | |
1321 | emit_orr (uint32_t *buf, struct aarch64_register rd, | |
1322 | struct aarch64_register rn, struct aarch64_register rm) | |
1323 | { | |
1324 | return emit_data_processing_reg (buf, ORR, rd, rn, rm); | |
1325 | } | |
1326 | ||
1327 | /* Write a ORN instruction into *BUF. | |
1328 | ||
1329 | ORN rd, rn, rm | |
1330 | ||
1331 | RD is the destination register. | |
1332 | RN and RM are the source registers. */ | |
1333 | ||
1334 | static int | |
1335 | emit_orn (uint32_t *buf, struct aarch64_register rd, | |
1336 | struct aarch64_register rn, struct aarch64_register rm) | |
1337 | { | |
1338 | return emit_data_processing_reg (buf, ORN, rd, rn, rm); | |
1339 | } | |
1340 | ||
1341 | /* Write a EOR instruction into *BUF. | |
1342 | ||
1343 | EOR rd, rn, rm | |
1344 | ||
1345 | RD is the destination register. | |
1346 | RN and RM are the source registers. */ | |
1347 | ||
1348 | static int | |
1349 | emit_eor (uint32_t *buf, struct aarch64_register rd, | |
1350 | struct aarch64_register rn, struct aarch64_register rm) | |
1351 | { | |
1352 | return emit_data_processing_reg (buf, EOR, rd, rn, rm); | |
1353 | } | |
1354 | ||
1355 | /* Write a MVN instruction into *BUF. | |
1356 | ||
1357 | MVN rd, rm | |
1358 | ||
1359 | This is an alias for ORN rd, xzr, rm. | |
1360 | ||
1361 | RD is the destination register. | |
1362 | RM is the source register. */ | |
1363 | ||
1364 | static int | |
1365 | emit_mvn (uint32_t *buf, struct aarch64_register rd, | |
1366 | struct aarch64_register rm) | |
1367 | { | |
1368 | return emit_orn (buf, rd, xzr, rm); | |
1369 | } | |
1370 | ||
1371 | /* Write a LSLV instruction into *BUF. | |
1372 | ||
1373 | LSLV rd, rn, rm | |
1374 | ||
1375 | RD is the destination register. | |
1376 | RN and RM are the source registers. */ | |
1377 | ||
1378 | static int | |
1379 | emit_lslv (uint32_t *buf, struct aarch64_register rd, | |
1380 | struct aarch64_register rn, struct aarch64_register rm) | |
1381 | { | |
1382 | return emit_data_processing_reg (buf, LSLV, rd, rn, rm); | |
1383 | } | |
1384 | ||
1385 | /* Write a LSRV instruction into *BUF. | |
1386 | ||
1387 | LSRV rd, rn, rm | |
1388 | ||
1389 | RD is the destination register. | |
1390 | RN and RM are the source registers. */ | |
1391 | ||
1392 | static int | |
1393 | emit_lsrv (uint32_t *buf, struct aarch64_register rd, | |
1394 | struct aarch64_register rn, struct aarch64_register rm) | |
1395 | { | |
1396 | return emit_data_processing_reg (buf, LSRV, rd, rn, rm); | |
1397 | } | |
1398 | ||
1399 | /* Write a ASRV instruction into *BUF. | |
1400 | ||
1401 | ASRV rd, rn, rm | |
1402 | ||
1403 | RD is the destination register. | |
1404 | RN and RM are the source registers. */ | |
1405 | ||
1406 | static int | |
1407 | emit_asrv (uint32_t *buf, struct aarch64_register rd, | |
1408 | struct aarch64_register rn, struct aarch64_register rm) | |
1409 | { | |
1410 | return emit_data_processing_reg (buf, ASRV, rd, rn, rm); | |
1411 | } | |
1412 | ||
1413 | /* Write a MUL instruction into *BUF. | |
1414 | ||
1415 | MUL rd, rn, rm | |
1416 | ||
1417 | RD is the destination register. | |
1418 | RN and RM are the source registers. */ | |
1419 | ||
1420 | static int | |
1421 | emit_mul (uint32_t *buf, struct aarch64_register rd, | |
1422 | struct aarch64_register rn, struct aarch64_register rm) | |
1423 | { | |
1424 | return emit_data_processing_reg (buf, MUL, rd, rn, rm); | |
1425 | } | |
1426 | ||
bb903df0 PL |
1427 | /* Write a MRS instruction into *BUF. The register size is 64-bit. |
1428 | ||
1429 | MRS xt, system_reg | |
1430 | ||
1431 | RT is the destination register. | |
1432 | SYSTEM_REG is special purpose register to read. */ | |
1433 | ||
1434 | static int | |
1435 | emit_mrs (uint32_t *buf, struct aarch64_register rt, | |
1436 | enum aarch64_system_control_registers system_reg) | |
1437 | { | |
e1c587c3 YQ |
1438 | return aarch64_emit_insn (buf, MRS | ENCODE (system_reg, 15, 5) |
1439 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1440 | } |
1441 | ||
1442 | /* Write a MSR instruction into *BUF. The register size is 64-bit. | |
1443 | ||
1444 | MSR system_reg, xt | |
1445 | ||
1446 | SYSTEM_REG is special purpose register to write. | |
1447 | RT is the input register. */ | |
1448 | ||
1449 | static int | |
1450 | emit_msr (uint32_t *buf, enum aarch64_system_control_registers system_reg, | |
1451 | struct aarch64_register rt) | |
1452 | { | |
e1c587c3 YQ |
1453 | return aarch64_emit_insn (buf, MSR | ENCODE (system_reg, 15, 5) |
1454 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1455 | } |
1456 | ||
1457 | /* Write a SEVL instruction into *BUF. | |
1458 | ||
1459 | This is a hint instruction telling the hardware to trigger an event. */ | |
1460 | ||
1461 | static int | |
1462 | emit_sevl (uint32_t *buf) | |
1463 | { | |
e1c587c3 | 1464 | return aarch64_emit_insn (buf, SEVL); |
bb903df0 PL |
1465 | } |
1466 | ||
1467 | /* Write a WFE instruction into *BUF. | |
1468 | ||
1469 | This is a hint instruction telling the hardware to wait for an event. */ | |
1470 | ||
1471 | static int | |
1472 | emit_wfe (uint32_t *buf) | |
1473 | { | |
e1c587c3 | 1474 | return aarch64_emit_insn (buf, WFE); |
bb903df0 PL |
1475 | } |
1476 | ||
afbe19f8 PL |
1477 | /* Write a SBFM instruction into *BUF. |
1478 | ||
1479 | SBFM rd, rn, #immr, #imms | |
1480 | ||
1481 | This instruction moves the bits from #immr to #imms into the | |
1482 | destination, sign extending the result. | |
1483 | ||
1484 | RD is the destination register. | |
1485 | RN is the source register. | |
1486 | IMMR is the bit number to start at (least significant bit). | |
1487 | IMMS is the bit number to stop at (most significant bit). */ | |
1488 | ||
1489 | static int | |
1490 | emit_sbfm (uint32_t *buf, struct aarch64_register rd, | |
1491 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1492 | { | |
1493 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1494 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1495 | ||
e1c587c3 YQ |
1496 | return aarch64_emit_insn (buf, SBFM | size | n | ENCODE (immr, 6, 16) |
1497 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1498 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1499 | } |
1500 | ||
1501 | /* Write a SBFX instruction into *BUF. | |
1502 | ||
1503 | SBFX rd, rn, #lsb, #width | |
1504 | ||
1505 | This instruction moves #width bits from #lsb into the destination, sign | |
1506 | extending the result. This is an alias for: | |
1507 | ||
1508 | SBFM rd, rn, #lsb, #(lsb + width - 1) | |
1509 | ||
1510 | RD is the destination register. | |
1511 | RN is the source register. | |
1512 | LSB is the bit number to start at (least significant bit). | |
1513 | WIDTH is the number of bits to move. */ | |
1514 | ||
1515 | static int | |
1516 | emit_sbfx (uint32_t *buf, struct aarch64_register rd, | |
1517 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1518 | { | |
1519 | return emit_sbfm (buf, rd, rn, lsb, lsb + width - 1); | |
1520 | } | |
1521 | ||
1522 | /* Write a UBFM instruction into *BUF. | |
1523 | ||
1524 | UBFM rd, rn, #immr, #imms | |
1525 | ||
1526 | This instruction moves the bits from #immr to #imms into the | |
1527 | destination, extending the result with zeros. | |
1528 | ||
1529 | RD is the destination register. | |
1530 | RN is the source register. | |
1531 | IMMR is the bit number to start at (least significant bit). | |
1532 | IMMS is the bit number to stop at (most significant bit). */ | |
1533 | ||
1534 | static int | |
1535 | emit_ubfm (uint32_t *buf, struct aarch64_register rd, | |
1536 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1537 | { | |
1538 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1539 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1540 | ||
e1c587c3 YQ |
1541 | return aarch64_emit_insn (buf, UBFM | size | n | ENCODE (immr, 6, 16) |
1542 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1543 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1544 | } |
1545 | ||
1546 | /* Write a UBFX instruction into *BUF. | |
1547 | ||
1548 | UBFX rd, rn, #lsb, #width | |
1549 | ||
1550 | This instruction moves #width bits from #lsb into the destination, | |
1551 | extending the result with zeros. This is an alias for: | |
1552 | ||
1553 | UBFM rd, rn, #lsb, #(lsb + width - 1) | |
1554 | ||
1555 | RD is the destination register. | |
1556 | RN is the source register. | |
1557 | LSB is the bit number to start at (least significant bit). | |
1558 | WIDTH is the number of bits to move. */ | |
1559 | ||
1560 | static int | |
1561 | emit_ubfx (uint32_t *buf, struct aarch64_register rd, | |
1562 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1563 | { | |
1564 | return emit_ubfm (buf, rd, rn, lsb, lsb + width - 1); | |
1565 | } | |
1566 | ||
1567 | /* Write a CSINC instruction into *BUF. | |
1568 | ||
1569 | CSINC rd, rn, rm, cond | |
1570 | ||
1571 | This instruction conditionally increments rn or rm and places the result | |
1572 | in rd. rn is chosen is the condition is true. | |
1573 | ||
1574 | RD is the destination register. | |
1575 | RN and RM are the source registers. | |
1576 | COND is the encoded condition. */ | |
1577 | ||
1578 | static int | |
1579 | emit_csinc (uint32_t *buf, struct aarch64_register rd, | |
1580 | struct aarch64_register rn, struct aarch64_register rm, | |
1581 | unsigned cond) | |
1582 | { | |
1583 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1584 | ||
e1c587c3 YQ |
1585 | return aarch64_emit_insn (buf, CSINC | size | ENCODE (rm.num, 5, 16) |
1586 | | ENCODE (cond, 4, 12) | ENCODE (rn.num, 5, 5) | |
1587 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1588 | } |
1589 | ||
1590 | /* Write a CSET instruction into *BUF. | |
1591 | ||
1592 | CSET rd, cond | |
1593 | ||
1594 | This instruction conditionally write 1 or 0 in the destination register. | |
1595 | 1 is written if the condition is true. This is an alias for: | |
1596 | ||
1597 | CSINC rd, xzr, xzr, !cond | |
1598 | ||
1599 | Note that the condition needs to be inverted. | |
1600 | ||
1601 | RD is the destination register. | |
1602 | RN and RM are the source registers. | |
1603 | COND is the encoded condition. */ | |
1604 | ||
1605 | static int | |
1606 | emit_cset (uint32_t *buf, struct aarch64_register rd, unsigned cond) | |
1607 | { | |
1608 | /* The least significant bit of the condition needs toggling in order to | |
1609 | invert it. */ | |
1610 | return emit_csinc (buf, rd, xzr, xzr, cond ^ 0x1); | |
1611 | } | |
1612 | ||
bb903df0 PL |
1613 | /* Write LEN instructions from BUF into the inferior memory at *TO. |
1614 | ||
1615 | Note instructions are always little endian on AArch64, unlike data. */ | |
1616 | ||
1617 | static void | |
1618 | append_insns (CORE_ADDR *to, size_t len, const uint32_t *buf) | |
1619 | { | |
1620 | size_t byte_len = len * sizeof (uint32_t); | |
1621 | #if (__BYTE_ORDER == __BIG_ENDIAN) | |
cb93dc7f | 1622 | uint32_t *le_buf = (uint32_t *) xmalloc (byte_len); |
bb903df0 PL |
1623 | size_t i; |
1624 | ||
1625 | for (i = 0; i < len; i++) | |
1626 | le_buf[i] = htole32 (buf[i]); | |
1627 | ||
1628 | write_inferior_memory (*to, (const unsigned char *) le_buf, byte_len); | |
1629 | ||
1630 | xfree (le_buf); | |
1631 | #else | |
1632 | write_inferior_memory (*to, (const unsigned char *) buf, byte_len); | |
1633 | #endif | |
1634 | ||
1635 | *to += byte_len; | |
1636 | } | |
1637 | ||
0badd99f YQ |
1638 | /* Sub-class of struct aarch64_insn_data, store information of |
1639 | instruction relocation for fast tracepoint. Visitor can | |
1640 | relocate an instruction from BASE.INSN_ADDR to NEW_ADDR and save | |
1641 | the relocated instructions in buffer pointed by INSN_PTR. */ | |
bb903df0 | 1642 | |
0badd99f YQ |
1643 | struct aarch64_insn_relocation_data |
1644 | { | |
1645 | struct aarch64_insn_data base; | |
1646 | ||
1647 | /* The new address the instruction is relocated to. */ | |
1648 | CORE_ADDR new_addr; | |
1649 | /* Pointer to the buffer of relocated instruction(s). */ | |
1650 | uint32_t *insn_ptr; | |
1651 | }; | |
1652 | ||
1653 | /* Implementation of aarch64_insn_visitor method "b". */ | |
1654 | ||
1655 | static void | |
1656 | aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset, | |
1657 | struct aarch64_insn_data *data) | |
1658 | { | |
1659 | struct aarch64_insn_relocation_data *insn_reloc | |
1660 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1661 | int64_t new_offset |
0badd99f YQ |
1662 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1663 | ||
1664 | if (can_encode_int32 (new_offset, 28)) | |
1665 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, is_bl, new_offset); | |
1666 | } | |
1667 | ||
1668 | /* Implementation of aarch64_insn_visitor method "b_cond". */ | |
1669 | ||
1670 | static void | |
1671 | aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset, | |
1672 | struct aarch64_insn_data *data) | |
1673 | { | |
1674 | struct aarch64_insn_relocation_data *insn_reloc | |
1675 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1676 | int64_t new_offset |
0badd99f YQ |
1677 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1678 | ||
1679 | if (can_encode_int32 (new_offset, 21)) | |
1680 | { | |
1681 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, | |
1682 | new_offset); | |
bb903df0 | 1683 | } |
0badd99f | 1684 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1685 | { |
0badd99f YQ |
1686 | /* The offset is out of range for a conditional branch |
1687 | instruction but not for a unconditional branch. We can use | |
1688 | the following instructions instead: | |
bb903df0 | 1689 | |
0badd99f YQ |
1690 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
1691 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1692 | TAKEN: | |
1693 | B #(offset - 8) | |
1694 | NOT_TAKEN: | |
1695 | ||
1696 | */ | |
1697 | ||
1698 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, 8); | |
1699 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1700 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
bb903df0 | 1701 | } |
0badd99f | 1702 | } |
bb903df0 | 1703 | |
0badd99f YQ |
1704 | /* Implementation of aarch64_insn_visitor method "cb". */ |
1705 | ||
1706 | static void | |
1707 | aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz, | |
1708 | const unsigned rn, int is64, | |
1709 | struct aarch64_insn_data *data) | |
1710 | { | |
1711 | struct aarch64_insn_relocation_data *insn_reloc | |
1712 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1713 | int64_t new_offset |
0badd99f YQ |
1714 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1715 | ||
1716 | if (can_encode_int32 (new_offset, 21)) | |
1717 | { | |
1718 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1719 | aarch64_register (rn, is64), new_offset); | |
bb903df0 | 1720 | } |
0badd99f | 1721 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1722 | { |
0badd99f YQ |
1723 | /* The offset is out of range for a compare and branch |
1724 | instruction but not for a unconditional branch. We can use | |
1725 | the following instructions instead: | |
1726 | ||
1727 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. | |
1728 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1729 | TAKEN: | |
1730 | B #(offset - 8) | |
1731 | NOT_TAKEN: | |
1732 | ||
1733 | */ | |
1734 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1735 | aarch64_register (rn, is64), 8); | |
1736 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1737 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
1738 | } | |
1739 | } | |
bb903df0 | 1740 | |
0badd99f | 1741 | /* Implementation of aarch64_insn_visitor method "tb". */ |
bb903df0 | 1742 | |
0badd99f YQ |
1743 | static void |
1744 | aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz, | |
1745 | const unsigned rt, unsigned bit, | |
1746 | struct aarch64_insn_data *data) | |
1747 | { | |
1748 | struct aarch64_insn_relocation_data *insn_reloc | |
1749 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1750 | int64_t new_offset |
0badd99f YQ |
1751 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1752 | ||
1753 | if (can_encode_int32 (new_offset, 16)) | |
1754 | { | |
1755 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1756 | aarch64_register (rt, 1), new_offset); | |
bb903df0 | 1757 | } |
0badd99f | 1758 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1759 | { |
0badd99f YQ |
1760 | /* The offset is out of range for a test bit and branch |
1761 | instruction but not for a unconditional branch. We can use | |
1762 | the following instructions instead: | |
1763 | ||
1764 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. | |
1765 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1766 | TAKEN: | |
1767 | B #(offset - 8) | |
1768 | NOT_TAKEN: | |
1769 | ||
1770 | */ | |
1771 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1772 | aarch64_register (rt, 1), 8); | |
1773 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1774 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, | |
1775 | new_offset - 8); | |
1776 | } | |
1777 | } | |
bb903df0 | 1778 | |
0badd99f | 1779 | /* Implementation of aarch64_insn_visitor method "adr". */ |
bb903df0 | 1780 | |
0badd99f YQ |
1781 | static void |
1782 | aarch64_ftrace_insn_reloc_adr (const int32_t offset, const unsigned rd, | |
1783 | const int is_adrp, | |
1784 | struct aarch64_insn_data *data) | |
1785 | { | |
1786 | struct aarch64_insn_relocation_data *insn_reloc | |
1787 | = (struct aarch64_insn_relocation_data *) data; | |
1788 | /* We know exactly the address the ADR{P,} instruction will compute. | |
1789 | We can just write it to the destination register. */ | |
1790 | CORE_ADDR address = data->insn_addr + offset; | |
bb903df0 | 1791 | |
0badd99f YQ |
1792 | if (is_adrp) |
1793 | { | |
1794 | /* Clear the lower 12 bits of the offset to get the 4K page. */ | |
1795 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1796 | aarch64_register (rd, 1), | |
1797 | address & ~0xfff); | |
1798 | } | |
1799 | else | |
1800 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1801 | aarch64_register (rd, 1), address); | |
1802 | } | |
bb903df0 | 1803 | |
0badd99f | 1804 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
bb903df0 | 1805 | |
0badd99f YQ |
1806 | static void |
1807 | aarch64_ftrace_insn_reloc_ldr_literal (const int32_t offset, const int is_sw, | |
1808 | const unsigned rt, const int is64, | |
1809 | struct aarch64_insn_data *data) | |
1810 | { | |
1811 | struct aarch64_insn_relocation_data *insn_reloc | |
1812 | = (struct aarch64_insn_relocation_data *) data; | |
1813 | CORE_ADDR address = data->insn_addr + offset; | |
1814 | ||
1815 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1816 | aarch64_register (rt, 1), address); | |
1817 | ||
1818 | /* We know exactly what address to load from, and what register we | |
1819 | can use: | |
1820 | ||
1821 | MOV xd, #(oldloc + offset) | |
1822 | MOVK xd, #((oldloc + offset) >> 16), lsl #16 | |
1823 | ... | |
1824 | ||
1825 | LDR xd, [xd] ; or LDRSW xd, [xd] | |
1826 | ||
1827 | */ | |
1828 | ||
1829 | if (is_sw) | |
1830 | insn_reloc->insn_ptr += emit_ldrsw (insn_reloc->insn_ptr, | |
1831 | aarch64_register (rt, 1), | |
1832 | aarch64_register (rt, 1), | |
1833 | offset_memory_operand (0)); | |
bb903df0 | 1834 | else |
0badd99f YQ |
1835 | insn_reloc->insn_ptr += emit_ldr (insn_reloc->insn_ptr, |
1836 | aarch64_register (rt, is64), | |
1837 | aarch64_register (rt, 1), | |
1838 | offset_memory_operand (0)); | |
1839 | } | |
1840 | ||
1841 | /* Implementation of aarch64_insn_visitor method "others". */ | |
1842 | ||
1843 | static void | |
1844 | aarch64_ftrace_insn_reloc_others (const uint32_t insn, | |
1845 | struct aarch64_insn_data *data) | |
1846 | { | |
1847 | struct aarch64_insn_relocation_data *insn_reloc | |
1848 | = (struct aarch64_insn_relocation_data *) data; | |
bb903df0 | 1849 | |
0badd99f YQ |
1850 | /* The instruction is not PC relative. Just re-emit it at the new |
1851 | location. */ | |
e1c587c3 | 1852 | insn_reloc->insn_ptr += aarch64_emit_insn (insn_reloc->insn_ptr, insn); |
0badd99f YQ |
1853 | } |
1854 | ||
1855 | static const struct aarch64_insn_visitor visitor = | |
1856 | { | |
1857 | aarch64_ftrace_insn_reloc_b, | |
1858 | aarch64_ftrace_insn_reloc_b_cond, | |
1859 | aarch64_ftrace_insn_reloc_cb, | |
1860 | aarch64_ftrace_insn_reloc_tb, | |
1861 | aarch64_ftrace_insn_reloc_adr, | |
1862 | aarch64_ftrace_insn_reloc_ldr_literal, | |
1863 | aarch64_ftrace_insn_reloc_others, | |
1864 | }; | |
1865 | ||
bb903df0 PL |
1866 | /* Implementation of linux_target_ops method |
1867 | "install_fast_tracepoint_jump_pad". */ | |
1868 | ||
1869 | static int | |
1870 | aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, | |
1871 | CORE_ADDR tpaddr, | |
1872 | CORE_ADDR collector, | |
1873 | CORE_ADDR lockaddr, | |
1874 | ULONGEST orig_size, | |
1875 | CORE_ADDR *jump_entry, | |
1876 | CORE_ADDR *trampoline, | |
1877 | ULONGEST *trampoline_size, | |
1878 | unsigned char *jjump_pad_insn, | |
1879 | ULONGEST *jjump_pad_insn_size, | |
1880 | CORE_ADDR *adjusted_insn_addr, | |
1881 | CORE_ADDR *adjusted_insn_addr_end, | |
1882 | char *err) | |
1883 | { | |
1884 | uint32_t buf[256]; | |
1885 | uint32_t *p = buf; | |
2ac09a5b | 1886 | int64_t offset; |
bb903df0 | 1887 | int i; |
70b439f0 | 1888 | uint32_t insn; |
bb903df0 | 1889 | CORE_ADDR buildaddr = *jump_entry; |
0badd99f | 1890 | struct aarch64_insn_relocation_data insn_data; |
bb903df0 PL |
1891 | |
1892 | /* We need to save the current state on the stack both to restore it | |
1893 | later and to collect register values when the tracepoint is hit. | |
1894 | ||
1895 | The saved registers are pushed in a layout that needs to be in sync | |
1896 | with aarch64_ft_collect_regmap (see linux-aarch64-ipa.c). Later on | |
1897 | the supply_fast_tracepoint_registers function will fill in the | |
1898 | register cache from a pointer to saved registers on the stack we build | |
1899 | here. | |
1900 | ||
1901 | For simplicity, we set the size of each cell on the stack to 16 bytes. | |
1902 | This way one cell can hold any register type, from system registers | |
1903 | to the 128 bit SIMD&FP registers. Furthermore, the stack pointer | |
1904 | has to be 16 bytes aligned anyway. | |
1905 | ||
1906 | Note that the CPSR register does not exist on AArch64. Instead we | |
1907 | can access system bits describing the process state with the | |
1908 | MRS/MSR instructions, namely the condition flags. We save them as | |
1909 | if they are part of a CPSR register because that's how GDB | |
1910 | interprets these system bits. At the moment, only the condition | |
1911 | flags are saved in CPSR (NZCV). | |
1912 | ||
1913 | Stack layout, each cell is 16 bytes (descending): | |
1914 | ||
1915 | High *-------- SIMD&FP registers from 31 down to 0. --------* | |
1916 | | q31 | | |
1917 | . . | |
1918 | . . 32 cells | |
1919 | . . | |
1920 | | q0 | | |
1921 | *---- General purpose registers from 30 down to 0. ----* | |
1922 | | x30 | | |
1923 | . . | |
1924 | . . 31 cells | |
1925 | . . | |
1926 | | x0 | | |
1927 | *------------- Special purpose registers. -------------* | |
1928 | | SP | | |
1929 | | PC | | |
1930 | | CPSR (NZCV) | 5 cells | |
1931 | | FPSR | | |
1932 | | FPCR | <- SP + 16 | |
1933 | *------------- collecting_t object --------------------* | |
1934 | | TPIDR_EL0 | struct tracepoint * | | |
1935 | Low *------------------------------------------------------* | |
1936 | ||
1937 | After this stack is set up, we issue a call to the collector, passing | |
1938 | it the saved registers at (SP + 16). */ | |
1939 | ||
1940 | /* Push SIMD&FP registers on the stack: | |
1941 | ||
1942 | SUB sp, sp, #(32 * 16) | |
1943 | ||
1944 | STP q30, q31, [sp, #(30 * 16)] | |
1945 | ... | |
1946 | STP q0, q1, [sp] | |
1947 | ||
1948 | */ | |
1949 | p += emit_sub (p, sp, sp, immediate_operand (32 * 16)); | |
1950 | for (i = 30; i >= 0; i -= 2) | |
1951 | p += emit_stp_q_offset (p, i, i + 1, sp, i * 16); | |
1952 | ||
1953 | /* Push general puspose registers on the stack. Note that we do not need | |
1954 | to push x31 as it represents the xzr register and not the stack | |
1955 | pointer in a STR instruction. | |
1956 | ||
1957 | SUB sp, sp, #(31 * 16) | |
1958 | ||
1959 | STR x30, [sp, #(30 * 16)] | |
1960 | ... | |
1961 | STR x0, [sp] | |
1962 | ||
1963 | */ | |
1964 | p += emit_sub (p, sp, sp, immediate_operand (31 * 16)); | |
1965 | for (i = 30; i >= 0; i -= 1) | |
1966 | p += emit_str (p, aarch64_register (i, 1), sp, | |
1967 | offset_memory_operand (i * 16)); | |
1968 | ||
1969 | /* Make space for 5 more cells. | |
1970 | ||
1971 | SUB sp, sp, #(5 * 16) | |
1972 | ||
1973 | */ | |
1974 | p += emit_sub (p, sp, sp, immediate_operand (5 * 16)); | |
1975 | ||
1976 | ||
1977 | /* Save SP: | |
1978 | ||
1979 | ADD x4, sp, #((32 + 31 + 5) * 16) | |
1980 | STR x4, [sp, #(4 * 16)] | |
1981 | ||
1982 | */ | |
1983 | p += emit_add (p, x4, sp, immediate_operand ((32 + 31 + 5) * 16)); | |
1984 | p += emit_str (p, x4, sp, offset_memory_operand (4 * 16)); | |
1985 | ||
1986 | /* Save PC (tracepoint address): | |
1987 | ||
1988 | MOV x3, #(tpaddr) | |
1989 | ... | |
1990 | ||
1991 | STR x3, [sp, #(3 * 16)] | |
1992 | ||
1993 | */ | |
1994 | ||
1995 | p += emit_mov_addr (p, x3, tpaddr); | |
1996 | p += emit_str (p, x3, sp, offset_memory_operand (3 * 16)); | |
1997 | ||
1998 | /* Save CPSR (NZCV), FPSR and FPCR: | |
1999 | ||
2000 | MRS x2, nzcv | |
2001 | MRS x1, fpsr | |
2002 | MRS x0, fpcr | |
2003 | ||
2004 | STR x2, [sp, #(2 * 16)] | |
2005 | STR x1, [sp, #(1 * 16)] | |
2006 | STR x0, [sp, #(0 * 16)] | |
2007 | ||
2008 | */ | |
2009 | p += emit_mrs (p, x2, NZCV); | |
2010 | p += emit_mrs (p, x1, FPSR); | |
2011 | p += emit_mrs (p, x0, FPCR); | |
2012 | p += emit_str (p, x2, sp, offset_memory_operand (2 * 16)); | |
2013 | p += emit_str (p, x1, sp, offset_memory_operand (1 * 16)); | |
2014 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2015 | ||
2016 | /* Push the collecting_t object. It consist of the address of the | |
2017 | tracepoint and an ID for the current thread. We get the latter by | |
2018 | reading the tpidr_el0 system register. It corresponds to the | |
2019 | NT_ARM_TLS register accessible with ptrace. | |
2020 | ||
2021 | MOV x0, #(tpoint) | |
2022 | ... | |
2023 | ||
2024 | MRS x1, tpidr_el0 | |
2025 | ||
2026 | STP x0, x1, [sp, #-16]! | |
2027 | ||
2028 | */ | |
2029 | ||
2030 | p += emit_mov_addr (p, x0, tpoint); | |
2031 | p += emit_mrs (p, x1, TPIDR_EL0); | |
2032 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-16)); | |
2033 | ||
2034 | /* Spin-lock: | |
2035 | ||
2036 | The shared memory for the lock is at lockaddr. It will hold zero | |
2037 | if no-one is holding the lock, otherwise it contains the address of | |
2038 | the collecting_t object on the stack of the thread which acquired it. | |
2039 | ||
2040 | At this stage, the stack pointer points to this thread's collecting_t | |
2041 | object. | |
2042 | ||
2043 | We use the following registers: | |
2044 | - x0: Address of the lock. | |
2045 | - x1: Pointer to collecting_t object. | |
2046 | - x2: Scratch register. | |
2047 | ||
2048 | MOV x0, #(lockaddr) | |
2049 | ... | |
2050 | MOV x1, sp | |
2051 | ||
2052 | ; Trigger an event local to this core. So the following WFE | |
2053 | ; instruction is ignored. | |
2054 | SEVL | |
2055 | again: | |
2056 | ; Wait for an event. The event is triggered by either the SEVL | |
2057 | ; or STLR instructions (store release). | |
2058 | WFE | |
2059 | ||
2060 | ; Atomically read at lockaddr. This marks the memory location as | |
2061 | ; exclusive. This instruction also has memory constraints which | |
2062 | ; make sure all previous data reads and writes are done before | |
2063 | ; executing it. | |
2064 | LDAXR x2, [x0] | |
2065 | ||
2066 | ; Try again if another thread holds the lock. | |
2067 | CBNZ x2, again | |
2068 | ||
2069 | ; We can lock it! Write the address of the collecting_t object. | |
2070 | ; This instruction will fail if the memory location is not marked | |
2071 | ; as exclusive anymore. If it succeeds, it will remove the | |
2072 | ; exclusive mark on the memory location. This way, if another | |
2073 | ; thread executes this instruction before us, we will fail and try | |
2074 | ; all over again. | |
2075 | STXR w2, x1, [x0] | |
2076 | CBNZ w2, again | |
2077 | ||
2078 | */ | |
2079 | ||
2080 | p += emit_mov_addr (p, x0, lockaddr); | |
2081 | p += emit_mov (p, x1, register_operand (sp)); | |
2082 | ||
2083 | p += emit_sevl (p); | |
2084 | p += emit_wfe (p); | |
2085 | p += emit_ldaxr (p, x2, x0); | |
2086 | p += emit_cb (p, 1, w2, -2 * 4); | |
2087 | p += emit_stxr (p, w2, x1, x0); | |
2088 | p += emit_cb (p, 1, x2, -4 * 4); | |
2089 | ||
2090 | /* Call collector (struct tracepoint *, unsigned char *): | |
2091 | ||
2092 | MOV x0, #(tpoint) | |
2093 | ... | |
2094 | ||
2095 | ; Saved registers start after the collecting_t object. | |
2096 | ADD x1, sp, #16 | |
2097 | ||
2098 | ; We use an intra-procedure-call scratch register. | |
2099 | MOV ip0, #(collector) | |
2100 | ... | |
2101 | ||
2102 | ; And call back to C! | |
2103 | BLR ip0 | |
2104 | ||
2105 | */ | |
2106 | ||
2107 | p += emit_mov_addr (p, x0, tpoint); | |
2108 | p += emit_add (p, x1, sp, immediate_operand (16)); | |
2109 | ||
2110 | p += emit_mov_addr (p, ip0, collector); | |
2111 | p += emit_blr (p, ip0); | |
2112 | ||
2113 | /* Release the lock. | |
2114 | ||
2115 | MOV x0, #(lockaddr) | |
2116 | ... | |
2117 | ||
2118 | ; This instruction is a normal store with memory ordering | |
2119 | ; constraints. Thanks to this we do not have to put a data | |
2120 | ; barrier instruction to make sure all data read and writes are done | |
2121 | ; before this instruction is executed. Furthermore, this instrucion | |
2122 | ; will trigger an event, letting other threads know they can grab | |
2123 | ; the lock. | |
2124 | STLR xzr, [x0] | |
2125 | ||
2126 | */ | |
2127 | p += emit_mov_addr (p, x0, lockaddr); | |
2128 | p += emit_stlr (p, xzr, x0); | |
2129 | ||
2130 | /* Free collecting_t object: | |
2131 | ||
2132 | ADD sp, sp, #16 | |
2133 | ||
2134 | */ | |
2135 | p += emit_add (p, sp, sp, immediate_operand (16)); | |
2136 | ||
2137 | /* Restore CPSR (NZCV), FPSR and FPCR. And free all special purpose | |
2138 | registers from the stack. | |
2139 | ||
2140 | LDR x2, [sp, #(2 * 16)] | |
2141 | LDR x1, [sp, #(1 * 16)] | |
2142 | LDR x0, [sp, #(0 * 16)] | |
2143 | ||
2144 | MSR NZCV, x2 | |
2145 | MSR FPSR, x1 | |
2146 | MSR FPCR, x0 | |
2147 | ||
2148 | ADD sp, sp #(5 * 16) | |
2149 | ||
2150 | */ | |
2151 | p += emit_ldr (p, x2, sp, offset_memory_operand (2 * 16)); | |
2152 | p += emit_ldr (p, x1, sp, offset_memory_operand (1 * 16)); | |
2153 | p += emit_ldr (p, x0, sp, offset_memory_operand (0 * 16)); | |
2154 | p += emit_msr (p, NZCV, x2); | |
2155 | p += emit_msr (p, FPSR, x1); | |
2156 | p += emit_msr (p, FPCR, x0); | |
2157 | ||
2158 | p += emit_add (p, sp, sp, immediate_operand (5 * 16)); | |
2159 | ||
2160 | /* Pop general purpose registers: | |
2161 | ||
2162 | LDR x0, [sp] | |
2163 | ... | |
2164 | LDR x30, [sp, #(30 * 16)] | |
2165 | ||
2166 | ADD sp, sp, #(31 * 16) | |
2167 | ||
2168 | */ | |
2169 | for (i = 0; i <= 30; i += 1) | |
2170 | p += emit_ldr (p, aarch64_register (i, 1), sp, | |
2171 | offset_memory_operand (i * 16)); | |
2172 | p += emit_add (p, sp, sp, immediate_operand (31 * 16)); | |
2173 | ||
2174 | /* Pop SIMD&FP registers: | |
2175 | ||
2176 | LDP q0, q1, [sp] | |
2177 | ... | |
2178 | LDP q30, q31, [sp, #(30 * 16)] | |
2179 | ||
2180 | ADD sp, sp, #(32 * 16) | |
2181 | ||
2182 | */ | |
2183 | for (i = 0; i <= 30; i += 2) | |
2184 | p += emit_ldp_q_offset (p, i, i + 1, sp, i * 16); | |
2185 | p += emit_add (p, sp, sp, immediate_operand (32 * 16)); | |
2186 | ||
2187 | /* Write the code into the inferior memory. */ | |
2188 | append_insns (&buildaddr, p - buf, buf); | |
2189 | ||
2190 | /* Now emit the relocated instruction. */ | |
2191 | *adjusted_insn_addr = buildaddr; | |
70b439f0 | 2192 | target_read_uint32 (tpaddr, &insn); |
0badd99f YQ |
2193 | |
2194 | insn_data.base.insn_addr = tpaddr; | |
2195 | insn_data.new_addr = buildaddr; | |
2196 | insn_data.insn_ptr = buf; | |
2197 | ||
2198 | aarch64_relocate_instruction (insn, &visitor, | |
2199 | (struct aarch64_insn_data *) &insn_data); | |
2200 | ||
bb903df0 | 2201 | /* We may not have been able to relocate the instruction. */ |
0badd99f | 2202 | if (insn_data.insn_ptr == buf) |
bb903df0 PL |
2203 | { |
2204 | sprintf (err, | |
2205 | "E.Could not relocate instruction from %s to %s.", | |
2206 | core_addr_to_string_nz (tpaddr), | |
2207 | core_addr_to_string_nz (buildaddr)); | |
2208 | return 1; | |
2209 | } | |
dfaffe9d | 2210 | else |
0badd99f | 2211 | append_insns (&buildaddr, insn_data.insn_ptr - buf, buf); |
dfaffe9d | 2212 | *adjusted_insn_addr_end = buildaddr; |
bb903df0 PL |
2213 | |
2214 | /* Go back to the start of the buffer. */ | |
2215 | p = buf; | |
2216 | ||
2217 | /* Emit a branch back from the jump pad. */ | |
2218 | offset = (tpaddr + orig_size - buildaddr); | |
2219 | if (!can_encode_int32 (offset, 28)) | |
2220 | { | |
2221 | sprintf (err, | |
2222 | "E.Jump back from jump pad too far from tracepoint " | |
2ac09a5b | 2223 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2224 | offset); |
2225 | return 1; | |
2226 | } | |
2227 | ||
2228 | p += emit_b (p, 0, offset); | |
2229 | append_insns (&buildaddr, p - buf, buf); | |
2230 | ||
2231 | /* Give the caller a branch instruction into the jump pad. */ | |
2232 | offset = (*jump_entry - tpaddr); | |
2233 | if (!can_encode_int32 (offset, 28)) | |
2234 | { | |
2235 | sprintf (err, | |
2236 | "E.Jump pad too far from tracepoint " | |
2ac09a5b | 2237 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2238 | offset); |
2239 | return 1; | |
2240 | } | |
2241 | ||
2242 | emit_b ((uint32_t *) jjump_pad_insn, 0, offset); | |
2243 | *jjump_pad_insn_size = 4; | |
2244 | ||
2245 | /* Return the end address of our pad. */ | |
2246 | *jump_entry = buildaddr; | |
2247 | ||
2248 | return 0; | |
2249 | } | |
2250 | ||
afbe19f8 PL |
2251 | /* Helper function writing LEN instructions from START into |
2252 | current_insn_ptr. */ | |
2253 | ||
2254 | static void | |
2255 | emit_ops_insns (const uint32_t *start, int len) | |
2256 | { | |
2257 | CORE_ADDR buildaddr = current_insn_ptr; | |
2258 | ||
2259 | if (debug_threads) | |
2260 | debug_printf ("Adding %d instrucions at %s\n", | |
2261 | len, paddress (buildaddr)); | |
2262 | ||
2263 | append_insns (&buildaddr, len, start); | |
2264 | current_insn_ptr = buildaddr; | |
2265 | } | |
2266 | ||
2267 | /* Pop a register from the stack. */ | |
2268 | ||
2269 | static int | |
2270 | emit_pop (uint32_t *buf, struct aarch64_register rt) | |
2271 | { | |
2272 | return emit_ldr (buf, rt, sp, postindex_memory_operand (1 * 16)); | |
2273 | } | |
2274 | ||
2275 | /* Push a register on the stack. */ | |
2276 | ||
2277 | static int | |
2278 | emit_push (uint32_t *buf, struct aarch64_register rt) | |
2279 | { | |
2280 | return emit_str (buf, rt, sp, preindex_memory_operand (-1 * 16)); | |
2281 | } | |
2282 | ||
2283 | /* Implementation of emit_ops method "emit_prologue". */ | |
2284 | ||
2285 | static void | |
2286 | aarch64_emit_prologue (void) | |
2287 | { | |
2288 | uint32_t buf[16]; | |
2289 | uint32_t *p = buf; | |
2290 | ||
2291 | /* This function emit a prologue for the following function prototype: | |
2292 | ||
2293 | enum eval_result_type f (unsigned char *regs, | |
2294 | ULONGEST *value); | |
2295 | ||
2296 | The first argument is a buffer of raw registers. The second | |
2297 | argument is the result of | |
2298 | evaluating the expression, which will be set to whatever is on top of | |
2299 | the stack at the end. | |
2300 | ||
2301 | The stack set up by the prologue is as such: | |
2302 | ||
2303 | High *------------------------------------------------------* | |
2304 | | LR | | |
2305 | | FP | <- FP | |
2306 | | x1 (ULONGEST *value) | | |
2307 | | x0 (unsigned char *regs) | | |
2308 | Low *------------------------------------------------------* | |
2309 | ||
2310 | As we are implementing a stack machine, each opcode can expand the | |
2311 | stack so we never know how far we are from the data saved by this | |
2312 | prologue. In order to be able refer to value and regs later, we save | |
2313 | the current stack pointer in the frame pointer. This way, it is not | |
2314 | clobbered when calling C functions. | |
2315 | ||
2316 | Finally, throughtout every operation, we are using register x0 as the | |
2317 | top of the stack, and x1 as a scratch register. */ | |
2318 | ||
2319 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16)); | |
2320 | p += emit_str (p, lr, sp, offset_memory_operand (3 * 8)); | |
2321 | p += emit_str (p, fp, sp, offset_memory_operand (2 * 8)); | |
2322 | ||
2323 | p += emit_add (p, fp, sp, immediate_operand (2 * 8)); | |
2324 | ||
2325 | ||
2326 | emit_ops_insns (buf, p - buf); | |
2327 | } | |
2328 | ||
2329 | /* Implementation of emit_ops method "emit_epilogue". */ | |
2330 | ||
2331 | static void | |
2332 | aarch64_emit_epilogue (void) | |
2333 | { | |
2334 | uint32_t buf[16]; | |
2335 | uint32_t *p = buf; | |
2336 | ||
2337 | /* Store the result of the expression (x0) in *value. */ | |
2338 | p += emit_sub (p, x1, fp, immediate_operand (1 * 8)); | |
2339 | p += emit_ldr (p, x1, x1, offset_memory_operand (0)); | |
2340 | p += emit_str (p, x0, x1, offset_memory_operand (0)); | |
2341 | ||
2342 | /* Restore the previous state. */ | |
2343 | p += emit_add (p, sp, fp, immediate_operand (2 * 8)); | |
2344 | p += emit_ldp (p, fp, lr, fp, offset_memory_operand (0)); | |
2345 | ||
2346 | /* Return expr_eval_no_error. */ | |
2347 | p += emit_mov (p, x0, immediate_operand (expr_eval_no_error)); | |
2348 | p += emit_ret (p, lr); | |
2349 | ||
2350 | emit_ops_insns (buf, p - buf); | |
2351 | } | |
2352 | ||
2353 | /* Implementation of emit_ops method "emit_add". */ | |
2354 | ||
2355 | static void | |
2356 | aarch64_emit_add (void) | |
2357 | { | |
2358 | uint32_t buf[16]; | |
2359 | uint32_t *p = buf; | |
2360 | ||
2361 | p += emit_pop (p, x1); | |
45e3745e | 2362 | p += emit_add (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2363 | |
2364 | emit_ops_insns (buf, p - buf); | |
2365 | } | |
2366 | ||
2367 | /* Implementation of emit_ops method "emit_sub". */ | |
2368 | ||
2369 | static void | |
2370 | aarch64_emit_sub (void) | |
2371 | { | |
2372 | uint32_t buf[16]; | |
2373 | uint32_t *p = buf; | |
2374 | ||
2375 | p += emit_pop (p, x1); | |
45e3745e | 2376 | p += emit_sub (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2377 | |
2378 | emit_ops_insns (buf, p - buf); | |
2379 | } | |
2380 | ||
2381 | /* Implementation of emit_ops method "emit_mul". */ | |
2382 | ||
2383 | static void | |
2384 | aarch64_emit_mul (void) | |
2385 | { | |
2386 | uint32_t buf[16]; | |
2387 | uint32_t *p = buf; | |
2388 | ||
2389 | p += emit_pop (p, x1); | |
2390 | p += emit_mul (p, x0, x1, x0); | |
2391 | ||
2392 | emit_ops_insns (buf, p - buf); | |
2393 | } | |
2394 | ||
2395 | /* Implementation of emit_ops method "emit_lsh". */ | |
2396 | ||
2397 | static void | |
2398 | aarch64_emit_lsh (void) | |
2399 | { | |
2400 | uint32_t buf[16]; | |
2401 | uint32_t *p = buf; | |
2402 | ||
2403 | p += emit_pop (p, x1); | |
2404 | p += emit_lslv (p, x0, x1, x0); | |
2405 | ||
2406 | emit_ops_insns (buf, p - buf); | |
2407 | } | |
2408 | ||
2409 | /* Implementation of emit_ops method "emit_rsh_signed". */ | |
2410 | ||
2411 | static void | |
2412 | aarch64_emit_rsh_signed (void) | |
2413 | { | |
2414 | uint32_t buf[16]; | |
2415 | uint32_t *p = buf; | |
2416 | ||
2417 | p += emit_pop (p, x1); | |
2418 | p += emit_asrv (p, x0, x1, x0); | |
2419 | ||
2420 | emit_ops_insns (buf, p - buf); | |
2421 | } | |
2422 | ||
2423 | /* Implementation of emit_ops method "emit_rsh_unsigned". */ | |
2424 | ||
2425 | static void | |
2426 | aarch64_emit_rsh_unsigned (void) | |
2427 | { | |
2428 | uint32_t buf[16]; | |
2429 | uint32_t *p = buf; | |
2430 | ||
2431 | p += emit_pop (p, x1); | |
2432 | p += emit_lsrv (p, x0, x1, x0); | |
2433 | ||
2434 | emit_ops_insns (buf, p - buf); | |
2435 | } | |
2436 | ||
2437 | /* Implementation of emit_ops method "emit_ext". */ | |
2438 | ||
2439 | static void | |
2440 | aarch64_emit_ext (int arg) | |
2441 | { | |
2442 | uint32_t buf[16]; | |
2443 | uint32_t *p = buf; | |
2444 | ||
2445 | p += emit_sbfx (p, x0, x0, 0, arg); | |
2446 | ||
2447 | emit_ops_insns (buf, p - buf); | |
2448 | } | |
2449 | ||
2450 | /* Implementation of emit_ops method "emit_log_not". */ | |
2451 | ||
2452 | static void | |
2453 | aarch64_emit_log_not (void) | |
2454 | { | |
2455 | uint32_t buf[16]; | |
2456 | uint32_t *p = buf; | |
2457 | ||
2458 | /* If the top of the stack is 0, replace it with 1. Else replace it with | |
2459 | 0. */ | |
2460 | ||
2461 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2462 | p += emit_cset (p, x0, EQ); | |
2463 | ||
2464 | emit_ops_insns (buf, p - buf); | |
2465 | } | |
2466 | ||
2467 | /* Implementation of emit_ops method "emit_bit_and". */ | |
2468 | ||
2469 | static void | |
2470 | aarch64_emit_bit_and (void) | |
2471 | { | |
2472 | uint32_t buf[16]; | |
2473 | uint32_t *p = buf; | |
2474 | ||
2475 | p += emit_pop (p, x1); | |
2476 | p += emit_and (p, x0, x0, x1); | |
2477 | ||
2478 | emit_ops_insns (buf, p - buf); | |
2479 | } | |
2480 | ||
2481 | /* Implementation of emit_ops method "emit_bit_or". */ | |
2482 | ||
2483 | static void | |
2484 | aarch64_emit_bit_or (void) | |
2485 | { | |
2486 | uint32_t buf[16]; | |
2487 | uint32_t *p = buf; | |
2488 | ||
2489 | p += emit_pop (p, x1); | |
2490 | p += emit_orr (p, x0, x0, x1); | |
2491 | ||
2492 | emit_ops_insns (buf, p - buf); | |
2493 | } | |
2494 | ||
2495 | /* Implementation of emit_ops method "emit_bit_xor". */ | |
2496 | ||
2497 | static void | |
2498 | aarch64_emit_bit_xor (void) | |
2499 | { | |
2500 | uint32_t buf[16]; | |
2501 | uint32_t *p = buf; | |
2502 | ||
2503 | p += emit_pop (p, x1); | |
2504 | p += emit_eor (p, x0, x0, x1); | |
2505 | ||
2506 | emit_ops_insns (buf, p - buf); | |
2507 | } | |
2508 | ||
2509 | /* Implementation of emit_ops method "emit_bit_not". */ | |
2510 | ||
2511 | static void | |
2512 | aarch64_emit_bit_not (void) | |
2513 | { | |
2514 | uint32_t buf[16]; | |
2515 | uint32_t *p = buf; | |
2516 | ||
2517 | p += emit_mvn (p, x0, x0); | |
2518 | ||
2519 | emit_ops_insns (buf, p - buf); | |
2520 | } | |
2521 | ||
2522 | /* Implementation of emit_ops method "emit_equal". */ | |
2523 | ||
2524 | static void | |
2525 | aarch64_emit_equal (void) | |
2526 | { | |
2527 | uint32_t buf[16]; | |
2528 | uint32_t *p = buf; | |
2529 | ||
2530 | p += emit_pop (p, x1); | |
2531 | p += emit_cmp (p, x0, register_operand (x1)); | |
2532 | p += emit_cset (p, x0, EQ); | |
2533 | ||
2534 | emit_ops_insns (buf, p - buf); | |
2535 | } | |
2536 | ||
2537 | /* Implementation of emit_ops method "emit_less_signed". */ | |
2538 | ||
2539 | static void | |
2540 | aarch64_emit_less_signed (void) | |
2541 | { | |
2542 | uint32_t buf[16]; | |
2543 | uint32_t *p = buf; | |
2544 | ||
2545 | p += emit_pop (p, x1); | |
2546 | p += emit_cmp (p, x1, register_operand (x0)); | |
2547 | p += emit_cset (p, x0, LT); | |
2548 | ||
2549 | emit_ops_insns (buf, p - buf); | |
2550 | } | |
2551 | ||
2552 | /* Implementation of emit_ops method "emit_less_unsigned". */ | |
2553 | ||
2554 | static void | |
2555 | aarch64_emit_less_unsigned (void) | |
2556 | { | |
2557 | uint32_t buf[16]; | |
2558 | uint32_t *p = buf; | |
2559 | ||
2560 | p += emit_pop (p, x1); | |
2561 | p += emit_cmp (p, x1, register_operand (x0)); | |
2562 | p += emit_cset (p, x0, LO); | |
2563 | ||
2564 | emit_ops_insns (buf, p - buf); | |
2565 | } | |
2566 | ||
2567 | /* Implementation of emit_ops method "emit_ref". */ | |
2568 | ||
2569 | static void | |
2570 | aarch64_emit_ref (int size) | |
2571 | { | |
2572 | uint32_t buf[16]; | |
2573 | uint32_t *p = buf; | |
2574 | ||
2575 | switch (size) | |
2576 | { | |
2577 | case 1: | |
2578 | p += emit_ldrb (p, w0, x0, offset_memory_operand (0)); | |
2579 | break; | |
2580 | case 2: | |
2581 | p += emit_ldrh (p, w0, x0, offset_memory_operand (0)); | |
2582 | break; | |
2583 | case 4: | |
2584 | p += emit_ldr (p, w0, x0, offset_memory_operand (0)); | |
2585 | break; | |
2586 | case 8: | |
2587 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2588 | break; | |
2589 | default: | |
2590 | /* Unknown size, bail on compilation. */ | |
2591 | emit_error = 1; | |
2592 | break; | |
2593 | } | |
2594 | ||
2595 | emit_ops_insns (buf, p - buf); | |
2596 | } | |
2597 | ||
2598 | /* Implementation of emit_ops method "emit_if_goto". */ | |
2599 | ||
2600 | static void | |
2601 | aarch64_emit_if_goto (int *offset_p, int *size_p) | |
2602 | { | |
2603 | uint32_t buf[16]; | |
2604 | uint32_t *p = buf; | |
2605 | ||
2606 | /* The Z flag is set or cleared here. */ | |
2607 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2608 | /* This instruction must not change the Z flag. */ | |
2609 | p += emit_pop (p, x0); | |
2610 | /* Branch over the next instruction if x0 == 0. */ | |
2611 | p += emit_bcond (p, EQ, 8); | |
2612 | ||
2613 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2614 | if (offset_p) | |
2615 | *offset_p = (p - buf) * 4; | |
2616 | if (size_p) | |
2617 | *size_p = 4; | |
2618 | p += emit_nop (p); | |
2619 | ||
2620 | emit_ops_insns (buf, p - buf); | |
2621 | } | |
2622 | ||
2623 | /* Implementation of emit_ops method "emit_goto". */ | |
2624 | ||
2625 | static void | |
2626 | aarch64_emit_goto (int *offset_p, int *size_p) | |
2627 | { | |
2628 | uint32_t buf[16]; | |
2629 | uint32_t *p = buf; | |
2630 | ||
2631 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2632 | if (offset_p) | |
2633 | *offset_p = 0; | |
2634 | if (size_p) | |
2635 | *size_p = 4; | |
2636 | p += emit_nop (p); | |
2637 | ||
2638 | emit_ops_insns (buf, p - buf); | |
2639 | } | |
2640 | ||
2641 | /* Implementation of emit_ops method "write_goto_address". */ | |
2642 | ||
2643 | void | |
2644 | aarch64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) | |
2645 | { | |
2646 | uint32_t insn; | |
2647 | ||
2648 | emit_b (&insn, 0, to - from); | |
2649 | append_insns (&from, 1, &insn); | |
2650 | } | |
2651 | ||
2652 | /* Implementation of emit_ops method "emit_const". */ | |
2653 | ||
2654 | static void | |
2655 | aarch64_emit_const (LONGEST num) | |
2656 | { | |
2657 | uint32_t buf[16]; | |
2658 | uint32_t *p = buf; | |
2659 | ||
2660 | p += emit_mov_addr (p, x0, num); | |
2661 | ||
2662 | emit_ops_insns (buf, p - buf); | |
2663 | } | |
2664 | ||
2665 | /* Implementation of emit_ops method "emit_call". */ | |
2666 | ||
2667 | static void | |
2668 | aarch64_emit_call (CORE_ADDR fn) | |
2669 | { | |
2670 | uint32_t buf[16]; | |
2671 | uint32_t *p = buf; | |
2672 | ||
2673 | p += emit_mov_addr (p, ip0, fn); | |
2674 | p += emit_blr (p, ip0); | |
2675 | ||
2676 | emit_ops_insns (buf, p - buf); | |
2677 | } | |
2678 | ||
2679 | /* Implementation of emit_ops method "emit_reg". */ | |
2680 | ||
2681 | static void | |
2682 | aarch64_emit_reg (int reg) | |
2683 | { | |
2684 | uint32_t buf[16]; | |
2685 | uint32_t *p = buf; | |
2686 | ||
2687 | /* Set x0 to unsigned char *regs. */ | |
2688 | p += emit_sub (p, x0, fp, immediate_operand (2 * 8)); | |
2689 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2690 | p += emit_mov (p, x1, immediate_operand (reg)); | |
2691 | ||
2692 | emit_ops_insns (buf, p - buf); | |
2693 | ||
2694 | aarch64_emit_call (get_raw_reg_func_addr ()); | |
2695 | } | |
2696 | ||
2697 | /* Implementation of emit_ops method "emit_pop". */ | |
2698 | ||
2699 | static void | |
2700 | aarch64_emit_pop (void) | |
2701 | { | |
2702 | uint32_t buf[16]; | |
2703 | uint32_t *p = buf; | |
2704 | ||
2705 | p += emit_pop (p, x0); | |
2706 | ||
2707 | emit_ops_insns (buf, p - buf); | |
2708 | } | |
2709 | ||
2710 | /* Implementation of emit_ops method "emit_stack_flush". */ | |
2711 | ||
2712 | static void | |
2713 | aarch64_emit_stack_flush (void) | |
2714 | { | |
2715 | uint32_t buf[16]; | |
2716 | uint32_t *p = buf; | |
2717 | ||
2718 | p += emit_push (p, x0); | |
2719 | ||
2720 | emit_ops_insns (buf, p - buf); | |
2721 | } | |
2722 | ||
2723 | /* Implementation of emit_ops method "emit_zero_ext". */ | |
2724 | ||
2725 | static void | |
2726 | aarch64_emit_zero_ext (int arg) | |
2727 | { | |
2728 | uint32_t buf[16]; | |
2729 | uint32_t *p = buf; | |
2730 | ||
2731 | p += emit_ubfx (p, x0, x0, 0, arg); | |
2732 | ||
2733 | emit_ops_insns (buf, p - buf); | |
2734 | } | |
2735 | ||
2736 | /* Implementation of emit_ops method "emit_swap". */ | |
2737 | ||
2738 | static void | |
2739 | aarch64_emit_swap (void) | |
2740 | { | |
2741 | uint32_t buf[16]; | |
2742 | uint32_t *p = buf; | |
2743 | ||
2744 | p += emit_ldr (p, x1, sp, offset_memory_operand (0 * 16)); | |
2745 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2746 | p += emit_mov (p, x0, register_operand (x1)); | |
2747 | ||
2748 | emit_ops_insns (buf, p - buf); | |
2749 | } | |
2750 | ||
2751 | /* Implementation of emit_ops method "emit_stack_adjust". */ | |
2752 | ||
2753 | static void | |
2754 | aarch64_emit_stack_adjust (int n) | |
2755 | { | |
2756 | /* This is not needed with our design. */ | |
2757 | uint32_t buf[16]; | |
2758 | uint32_t *p = buf; | |
2759 | ||
2760 | p += emit_add (p, sp, sp, immediate_operand (n * 16)); | |
2761 | ||
2762 | emit_ops_insns (buf, p - buf); | |
2763 | } | |
2764 | ||
2765 | /* Implementation of emit_ops method "emit_int_call_1". */ | |
2766 | ||
2767 | static void | |
2768 | aarch64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2769 | { | |
2770 | uint32_t buf[16]; | |
2771 | uint32_t *p = buf; | |
2772 | ||
2773 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2774 | ||
2775 | emit_ops_insns (buf, p - buf); | |
2776 | ||
2777 | aarch64_emit_call (fn); | |
2778 | } | |
2779 | ||
2780 | /* Implementation of emit_ops method "emit_void_call_2". */ | |
2781 | ||
2782 | static void | |
2783 | aarch64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2784 | { | |
2785 | uint32_t buf[16]; | |
2786 | uint32_t *p = buf; | |
2787 | ||
2788 | /* Push x0 on the stack. */ | |
2789 | aarch64_emit_stack_flush (); | |
2790 | ||
2791 | /* Setup arguments for the function call: | |
2792 | ||
2793 | x0: arg1 | |
2794 | x1: top of the stack | |
2795 | ||
2796 | MOV x1, x0 | |
2797 | MOV x0, #arg1 */ | |
2798 | ||
2799 | p += emit_mov (p, x1, register_operand (x0)); | |
2800 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2801 | ||
2802 | emit_ops_insns (buf, p - buf); | |
2803 | ||
2804 | aarch64_emit_call (fn); | |
2805 | ||
2806 | /* Restore x0. */ | |
2807 | aarch64_emit_pop (); | |
2808 | } | |
2809 | ||
2810 | /* Implementation of emit_ops method "emit_eq_goto". */ | |
2811 | ||
2812 | static void | |
2813 | aarch64_emit_eq_goto (int *offset_p, int *size_p) | |
2814 | { | |
2815 | uint32_t buf[16]; | |
2816 | uint32_t *p = buf; | |
2817 | ||
2818 | p += emit_pop (p, x1); | |
2819 | p += emit_cmp (p, x1, register_operand (x0)); | |
2820 | /* Branch over the next instruction if x0 != x1. */ | |
2821 | p += emit_bcond (p, NE, 8); | |
2822 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2823 | if (offset_p) | |
2824 | *offset_p = (p - buf) * 4; | |
2825 | if (size_p) | |
2826 | *size_p = 4; | |
2827 | p += emit_nop (p); | |
2828 | ||
2829 | emit_ops_insns (buf, p - buf); | |
2830 | } | |
2831 | ||
2832 | /* Implementation of emit_ops method "emit_ne_goto". */ | |
2833 | ||
2834 | static void | |
2835 | aarch64_emit_ne_goto (int *offset_p, int *size_p) | |
2836 | { | |
2837 | uint32_t buf[16]; | |
2838 | uint32_t *p = buf; | |
2839 | ||
2840 | p += emit_pop (p, x1); | |
2841 | p += emit_cmp (p, x1, register_operand (x0)); | |
2842 | /* Branch over the next instruction if x0 == x1. */ | |
2843 | p += emit_bcond (p, EQ, 8); | |
2844 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2845 | if (offset_p) | |
2846 | *offset_p = (p - buf) * 4; | |
2847 | if (size_p) | |
2848 | *size_p = 4; | |
2849 | p += emit_nop (p); | |
2850 | ||
2851 | emit_ops_insns (buf, p - buf); | |
2852 | } | |
2853 | ||
2854 | /* Implementation of emit_ops method "emit_lt_goto". */ | |
2855 | ||
2856 | static void | |
2857 | aarch64_emit_lt_goto (int *offset_p, int *size_p) | |
2858 | { | |
2859 | uint32_t buf[16]; | |
2860 | uint32_t *p = buf; | |
2861 | ||
2862 | p += emit_pop (p, x1); | |
2863 | p += emit_cmp (p, x1, register_operand (x0)); | |
2864 | /* Branch over the next instruction if x0 >= x1. */ | |
2865 | p += emit_bcond (p, GE, 8); | |
2866 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2867 | if (offset_p) | |
2868 | *offset_p = (p - buf) * 4; | |
2869 | if (size_p) | |
2870 | *size_p = 4; | |
2871 | p += emit_nop (p); | |
2872 | ||
2873 | emit_ops_insns (buf, p - buf); | |
2874 | } | |
2875 | ||
2876 | /* Implementation of emit_ops method "emit_le_goto". */ | |
2877 | ||
2878 | static void | |
2879 | aarch64_emit_le_goto (int *offset_p, int *size_p) | |
2880 | { | |
2881 | uint32_t buf[16]; | |
2882 | uint32_t *p = buf; | |
2883 | ||
2884 | p += emit_pop (p, x1); | |
2885 | p += emit_cmp (p, x1, register_operand (x0)); | |
2886 | /* Branch over the next instruction if x0 > x1. */ | |
2887 | p += emit_bcond (p, GT, 8); | |
2888 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2889 | if (offset_p) | |
2890 | *offset_p = (p - buf) * 4; | |
2891 | if (size_p) | |
2892 | *size_p = 4; | |
2893 | p += emit_nop (p); | |
2894 | ||
2895 | emit_ops_insns (buf, p - buf); | |
2896 | } | |
2897 | ||
2898 | /* Implementation of emit_ops method "emit_gt_goto". */ | |
2899 | ||
2900 | static void | |
2901 | aarch64_emit_gt_goto (int *offset_p, int *size_p) | |
2902 | { | |
2903 | uint32_t buf[16]; | |
2904 | uint32_t *p = buf; | |
2905 | ||
2906 | p += emit_pop (p, x1); | |
2907 | p += emit_cmp (p, x1, register_operand (x0)); | |
2908 | /* Branch over the next instruction if x0 <= x1. */ | |
2909 | p += emit_bcond (p, LE, 8); | |
2910 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2911 | if (offset_p) | |
2912 | *offset_p = (p - buf) * 4; | |
2913 | if (size_p) | |
2914 | *size_p = 4; | |
2915 | p += emit_nop (p); | |
2916 | ||
2917 | emit_ops_insns (buf, p - buf); | |
2918 | } | |
2919 | ||
2920 | /* Implementation of emit_ops method "emit_ge_got". */ | |
2921 | ||
2922 | static void | |
2923 | aarch64_emit_ge_got (int *offset_p, int *size_p) | |
2924 | { | |
2925 | uint32_t buf[16]; | |
2926 | uint32_t *p = buf; | |
2927 | ||
2928 | p += emit_pop (p, x1); | |
2929 | p += emit_cmp (p, x1, register_operand (x0)); | |
2930 | /* Branch over the next instruction if x0 <= x1. */ | |
2931 | p += emit_bcond (p, LT, 8); | |
2932 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2933 | if (offset_p) | |
2934 | *offset_p = (p - buf) * 4; | |
2935 | if (size_p) | |
2936 | *size_p = 4; | |
2937 | p += emit_nop (p); | |
2938 | ||
2939 | emit_ops_insns (buf, p - buf); | |
2940 | } | |
2941 | ||
2942 | static struct emit_ops aarch64_emit_ops_impl = | |
2943 | { | |
2944 | aarch64_emit_prologue, | |
2945 | aarch64_emit_epilogue, | |
2946 | aarch64_emit_add, | |
2947 | aarch64_emit_sub, | |
2948 | aarch64_emit_mul, | |
2949 | aarch64_emit_lsh, | |
2950 | aarch64_emit_rsh_signed, | |
2951 | aarch64_emit_rsh_unsigned, | |
2952 | aarch64_emit_ext, | |
2953 | aarch64_emit_log_not, | |
2954 | aarch64_emit_bit_and, | |
2955 | aarch64_emit_bit_or, | |
2956 | aarch64_emit_bit_xor, | |
2957 | aarch64_emit_bit_not, | |
2958 | aarch64_emit_equal, | |
2959 | aarch64_emit_less_signed, | |
2960 | aarch64_emit_less_unsigned, | |
2961 | aarch64_emit_ref, | |
2962 | aarch64_emit_if_goto, | |
2963 | aarch64_emit_goto, | |
2964 | aarch64_write_goto_address, | |
2965 | aarch64_emit_const, | |
2966 | aarch64_emit_call, | |
2967 | aarch64_emit_reg, | |
2968 | aarch64_emit_pop, | |
2969 | aarch64_emit_stack_flush, | |
2970 | aarch64_emit_zero_ext, | |
2971 | aarch64_emit_swap, | |
2972 | aarch64_emit_stack_adjust, | |
2973 | aarch64_emit_int_call_1, | |
2974 | aarch64_emit_void_call_2, | |
2975 | aarch64_emit_eq_goto, | |
2976 | aarch64_emit_ne_goto, | |
2977 | aarch64_emit_lt_goto, | |
2978 | aarch64_emit_le_goto, | |
2979 | aarch64_emit_gt_goto, | |
2980 | aarch64_emit_ge_got, | |
2981 | }; | |
2982 | ||
2983 | /* Implementation of linux_target_ops method "emit_ops". */ | |
2984 | ||
2985 | static struct emit_ops * | |
2986 | aarch64_emit_ops (void) | |
2987 | { | |
2988 | return &aarch64_emit_ops_impl; | |
2989 | } | |
2990 | ||
bb903df0 PL |
2991 | /* Implementation of linux_target_ops method |
2992 | "get_min_fast_tracepoint_insn_len". */ | |
2993 | ||
2994 | static int | |
2995 | aarch64_get_min_fast_tracepoint_insn_len (void) | |
2996 | { | |
2997 | return 4; | |
2998 | } | |
2999 | ||
d1d0aea1 PL |
3000 | /* Implementation of linux_target_ops method "supports_range_stepping". */ |
3001 | ||
3002 | static int | |
3003 | aarch64_supports_range_stepping (void) | |
3004 | { | |
3005 | return 1; | |
3006 | } | |
3007 | ||
dd373349 AT |
3008 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
3009 | ||
3010 | static const gdb_byte * | |
3011 | aarch64_sw_breakpoint_from_kind (int kind, int *size) | |
3012 | { | |
17b1509a YQ |
3013 | if (is_64bit_tdesc ()) |
3014 | { | |
3015 | *size = aarch64_breakpoint_len; | |
3016 | return aarch64_breakpoint; | |
3017 | } | |
3018 | else | |
3019 | return arm_sw_breakpoint_from_kind (kind, size); | |
3020 | } | |
3021 | ||
3022 | /* Implementation of linux_target_ops method "breakpoint_kind_from_pc". */ | |
3023 | ||
3024 | static int | |
3025 | aarch64_breakpoint_kind_from_pc (CORE_ADDR *pcptr) | |
3026 | { | |
3027 | if (is_64bit_tdesc ()) | |
3028 | return aarch64_breakpoint_len; | |
3029 | else | |
3030 | return arm_breakpoint_kind_from_pc (pcptr); | |
3031 | } | |
3032 | ||
3033 | /* Implementation of the linux_target_ops method | |
3034 | "breakpoint_kind_from_current_state". */ | |
3035 | ||
3036 | static int | |
3037 | aarch64_breakpoint_kind_from_current_state (CORE_ADDR *pcptr) | |
3038 | { | |
3039 | if (is_64bit_tdesc ()) | |
3040 | return aarch64_breakpoint_len; | |
3041 | else | |
3042 | return arm_breakpoint_kind_from_current_state (pcptr); | |
dd373349 AT |
3043 | } |
3044 | ||
7d00775e AT |
3045 | /* Support for hardware single step. */ |
3046 | ||
3047 | static int | |
3048 | aarch64_supports_hardware_single_step (void) | |
3049 | { | |
3050 | return 1; | |
3051 | } | |
3052 | ||
176eb98c MS |
3053 | struct linux_target_ops the_low_target = |
3054 | { | |
3055 | aarch64_arch_setup, | |
3aee8918 | 3056 | aarch64_regs_info, |
50138245 AH |
3057 | NULL, /* cannot_fetch_register */ |
3058 | NULL, /* cannot_store_register */ | |
421530db | 3059 | NULL, /* fetch_register */ |
176eb98c MS |
3060 | aarch64_get_pc, |
3061 | aarch64_set_pc, | |
17b1509a | 3062 | aarch64_breakpoint_kind_from_pc, |
dd373349 | 3063 | aarch64_sw_breakpoint_from_kind, |
fa5308bd | 3064 | NULL, /* get_next_pcs */ |
421530db | 3065 | 0, /* decr_pc_after_break */ |
176eb98c | 3066 | aarch64_breakpoint_at, |
802e8e6d | 3067 | aarch64_supports_z_point_type, |
176eb98c MS |
3068 | aarch64_insert_point, |
3069 | aarch64_remove_point, | |
3070 | aarch64_stopped_by_watchpoint, | |
3071 | aarch64_stopped_data_address, | |
421530db PL |
3072 | NULL, /* collect_ptrace_register */ |
3073 | NULL, /* supply_ptrace_register */ | |
ade90bde | 3074 | aarch64_linux_siginfo_fixup, |
176eb98c | 3075 | aarch64_linux_new_process, |
04ec7890 | 3076 | aarch64_linux_delete_process, |
176eb98c | 3077 | aarch64_linux_new_thread, |
466eecee | 3078 | aarch64_linux_delete_thread, |
3a8a0396 | 3079 | aarch64_linux_new_fork, |
176eb98c | 3080 | aarch64_linux_prepare_to_resume, |
421530db | 3081 | NULL, /* process_qsupported */ |
7671bf47 | 3082 | aarch64_supports_tracepoints, |
bb903df0 PL |
3083 | aarch64_get_thread_area, |
3084 | aarch64_install_fast_tracepoint_jump_pad, | |
afbe19f8 | 3085 | aarch64_emit_ops, |
bb903df0 | 3086 | aarch64_get_min_fast_tracepoint_insn_len, |
d1d0aea1 | 3087 | aarch64_supports_range_stepping, |
17b1509a | 3088 | aarch64_breakpoint_kind_from_current_state, |
7d00775e | 3089 | aarch64_supports_hardware_single_step, |
061fc021 | 3090 | aarch64_get_syscall_trapinfo, |
176eb98c | 3091 | }; |
3aee8918 PA |
3092 | |
3093 | void | |
3094 | initialize_low_arch (void) | |
3095 | { | |
3b53ae99 YQ |
3096 | initialize_low_arch_aarch32 (); |
3097 | ||
3aee8918 | 3098 | initialize_regsets_info (&aarch64_regsets_info); |
02895270 | 3099 | initialize_regsets_info (&aarch64_sve_regsets_info); |
6654d750 AH |
3100 | |
3101 | #if GDB_SELF_TEST | |
3102 | initialize_low_tdesc (); | |
3103 | #endif | |
3aee8918 | 3104 | } |