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 | ||
3666a048 | 4 | Copyright (C) 2009-2021 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" | |
f9d949fb | 31 | #include "debug.h" |
176eb98c MS |
32 | |
33 | #include <signal.h> | |
34 | #include <sys/user.h> | |
5826e159 | 35 | #include "nat/gdb_ptrace.h" |
e9dae05e | 36 | #include <asm/ptrace.h> |
bb903df0 PL |
37 | #include <inttypes.h> |
38 | #include <endian.h> | |
39 | #include <sys/uio.h> | |
176eb98c MS |
40 | |
41 | #include "gdb_proc_service.h" | |
cc628f3d | 42 | #include "arch/aarch64.h" |
04245125 | 43 | #include "arch/aarch64-mte-linux.h" |
7cc17433 | 44 | #include "linux-aarch32-tdesc.h" |
d6d7ce56 | 45 | #include "linux-aarch64-tdesc.h" |
fefa175e | 46 | #include "nat/aarch64-sve-linux-ptrace.h" |
02895270 | 47 | #include "tdesc.h" |
176eb98c | 48 | |
176eb98c MS |
49 | #ifdef HAVE_SYS_REG_H |
50 | #include <sys/reg.h> | |
51 | #endif | |
52 | ||
ef0478f6 TBA |
53 | /* Linux target op definitions for the AArch64 architecture. */ |
54 | ||
55 | class aarch64_target : public linux_process_target | |
56 | { | |
57 | public: | |
58 | ||
aa8d21c9 TBA |
59 | const regs_info *get_regs_info () override; |
60 | ||
06250e4e TBA |
61 | int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override; |
62 | ||
63 | int breakpoint_kind_from_current_state (CORE_ADDR *pcptr) override; | |
64 | ||
3ca4edb6 TBA |
65 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
66 | ||
007c9b97 TBA |
67 | bool supports_z_point_type (char z_type) override; |
68 | ||
47f70aa7 TBA |
69 | bool supports_tracepoints () override; |
70 | ||
809a0c35 TBA |
71 | bool supports_fast_tracepoints () override; |
72 | ||
73 | int install_fast_tracepoint_jump_pad | |
74 | (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector, | |
75 | CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry, | |
76 | CORE_ADDR *trampoline, ULONGEST *trampoline_size, | |
77 | unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size, | |
78 | CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end, | |
79 | char *err) override; | |
80 | ||
81 | int get_min_fast_tracepoint_insn_len () override; | |
82 | ||
ab64c999 TBA |
83 | struct emit_ops *emit_ops () override; |
84 | ||
797bcff5 TBA |
85 | protected: |
86 | ||
87 | void low_arch_setup () override; | |
daca57a7 TBA |
88 | |
89 | bool low_cannot_fetch_register (int regno) override; | |
90 | ||
91 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
92 | |
93 | bool low_supports_breakpoints () override; | |
94 | ||
95 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
96 | ||
97 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
d7146cda TBA |
98 | |
99 | bool low_breakpoint_at (CORE_ADDR pc) override; | |
9db9aa23 TBA |
100 | |
101 | int low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
102 | int size, raw_breakpoint *bp) override; | |
103 | ||
104 | int low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
105 | int size, raw_breakpoint *bp) override; | |
ac1bbaca TBA |
106 | |
107 | bool low_stopped_by_watchpoint () override; | |
108 | ||
109 | CORE_ADDR low_stopped_data_address () override; | |
cb63de7c TBA |
110 | |
111 | bool low_siginfo_fixup (siginfo_t *native, gdb_byte *inf, | |
112 | int direction) override; | |
fd000fb3 TBA |
113 | |
114 | arch_process_info *low_new_process () override; | |
115 | ||
116 | void low_delete_process (arch_process_info *info) override; | |
117 | ||
118 | void low_new_thread (lwp_info *) override; | |
119 | ||
120 | void low_delete_thread (arch_lwp_info *) override; | |
121 | ||
122 | void low_new_fork (process_info *parent, process_info *child) override; | |
d7599cc0 TBA |
123 | |
124 | void low_prepare_to_resume (lwp_info *lwp) override; | |
13e567af TBA |
125 | |
126 | int low_get_thread_area (int lwpid, CORE_ADDR *addrp) override; | |
9cfd8715 TBA |
127 | |
128 | bool low_supports_range_stepping () override; | |
9eedd27d TBA |
129 | |
130 | bool low_supports_catch_syscall () override; | |
131 | ||
132 | void low_get_syscall_trapinfo (regcache *regcache, int *sysno) override; | |
ef0478f6 TBA |
133 | }; |
134 | ||
135 | /* The singleton target ops object. */ | |
136 | ||
137 | static aarch64_target the_aarch64_target; | |
138 | ||
daca57a7 TBA |
139 | bool |
140 | aarch64_target::low_cannot_fetch_register (int regno) | |
141 | { | |
142 | gdb_assert_not_reached ("linux target op low_cannot_fetch_register " | |
143 | "is not implemented by the target"); | |
144 | } | |
145 | ||
146 | bool | |
147 | aarch64_target::low_cannot_store_register (int regno) | |
148 | { | |
149 | gdb_assert_not_reached ("linux target op low_cannot_store_register " | |
150 | "is not implemented by the target"); | |
151 | } | |
152 | ||
d7599cc0 TBA |
153 | void |
154 | aarch64_target::low_prepare_to_resume (lwp_info *lwp) | |
155 | { | |
156 | aarch64_linux_prepare_to_resume (lwp); | |
157 | } | |
158 | ||
176eb98c MS |
159 | /* Per-process arch-specific data we want to keep. */ |
160 | ||
161 | struct arch_process_info | |
162 | { | |
163 | /* Hardware breakpoint/watchpoint data. | |
164 | The reason for them to be per-process rather than per-thread is | |
165 | due to the lack of information in the gdbserver environment; | |
166 | gdbserver is not told that whether a requested hardware | |
167 | breakpoint/watchpoint is thread specific or not, so it has to set | |
168 | each hw bp/wp for every thread in the current process. The | |
169 | higher level bp/wp management in gdb will resume a thread if a hw | |
170 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
171 | same for each thread, it is reasonable for the data to live here. | |
172 | */ | |
173 | struct aarch64_debug_reg_state debug_reg_state; | |
174 | }; | |
175 | ||
3b53ae99 YQ |
176 | /* Return true if the size of register 0 is 8 byte. */ |
177 | ||
178 | static int | |
179 | is_64bit_tdesc (void) | |
180 | { | |
181 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
182 | ||
183 | return register_size (regcache->tdesc, 0) == 8; | |
184 | } | |
185 | ||
02895270 AH |
186 | /* Return true if the regcache contains the number of SVE registers. */ |
187 | ||
188 | static bool | |
189 | is_sve_tdesc (void) | |
190 | { | |
191 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
192 | ||
6cdd651f | 193 | return tdesc_contains_feature (regcache->tdesc, "org.gnu.gdb.aarch64.sve"); |
02895270 AH |
194 | } |
195 | ||
176eb98c MS |
196 | static void |
197 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
198 | { | |
6a69a054 | 199 | struct user_pt_regs *regset = (struct user_pt_regs *) buf; |
176eb98c MS |
200 | int i; |
201 | ||
202 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
203 | collect_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
204 | collect_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
205 | collect_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
206 | collect_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
207 | } |
208 | ||
209 | static void | |
210 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
211 | { | |
6a69a054 | 212 | const struct user_pt_regs *regset = (const struct user_pt_regs *) buf; |
176eb98c MS |
213 | int i; |
214 | ||
215 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
216 | supply_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
217 | supply_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
218 | supply_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
219 | supply_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
220 | } |
221 | ||
222 | static void | |
223 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
224 | { | |
9caa3311 | 225 | struct user_fpsimd_state *regset = (struct user_fpsimd_state *) buf; |
176eb98c MS |
226 | int i; |
227 | ||
228 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
229 | collect_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
230 | collect_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
231 | collect_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
232 | } |
233 | ||
234 | static void | |
235 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
236 | { | |
9caa3311 YQ |
237 | const struct user_fpsimd_state *regset |
238 | = (const struct user_fpsimd_state *) buf; | |
176eb98c MS |
239 | int i; |
240 | ||
241 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
242 | supply_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
243 | supply_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
244 | supply_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
245 | } |
246 | ||
1ef53e6b AH |
247 | /* Store the pauth registers to regcache. */ |
248 | ||
249 | static void | |
250 | aarch64_store_pauthregset (struct regcache *regcache, const void *buf) | |
251 | { | |
252 | uint64_t *pauth_regset = (uint64_t *) buf; | |
253 | int pauth_base = find_regno (regcache->tdesc, "pauth_dmask"); | |
254 | ||
255 | if (pauth_base == 0) | |
256 | return; | |
257 | ||
258 | supply_register (regcache, AARCH64_PAUTH_DMASK_REGNUM (pauth_base), | |
259 | &pauth_regset[0]); | |
260 | supply_register (regcache, AARCH64_PAUTH_CMASK_REGNUM (pauth_base), | |
261 | &pauth_regset[1]); | |
262 | } | |
263 | ||
bf9ae9d8 TBA |
264 | bool |
265 | aarch64_target::low_supports_breakpoints () | |
266 | { | |
267 | return true; | |
268 | } | |
269 | ||
270 | /* Implementation of linux target ops method "low_get_pc". */ | |
421530db | 271 | |
bf9ae9d8 TBA |
272 | CORE_ADDR |
273 | aarch64_target::low_get_pc (regcache *regcache) | |
176eb98c | 274 | { |
8a7e4587 | 275 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 276 | return linux_get_pc_64bit (regcache); |
8a7e4587 | 277 | else |
a5652c21 | 278 | return linux_get_pc_32bit (regcache); |
176eb98c MS |
279 | } |
280 | ||
bf9ae9d8 | 281 | /* Implementation of linux target ops method "low_set_pc". */ |
421530db | 282 | |
bf9ae9d8 TBA |
283 | void |
284 | aarch64_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
176eb98c | 285 | { |
8a7e4587 | 286 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 287 | linux_set_pc_64bit (regcache, pc); |
8a7e4587 | 288 | else |
a5652c21 | 289 | linux_set_pc_32bit (regcache, pc); |
176eb98c MS |
290 | } |
291 | ||
176eb98c MS |
292 | #define aarch64_breakpoint_len 4 |
293 | ||
37d66942 PL |
294 | /* AArch64 BRK software debug mode instruction. |
295 | This instruction needs to match gdb/aarch64-tdep.c | |
296 | (aarch64_default_breakpoint). */ | |
297 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 298 | |
d7146cda | 299 | /* Implementation of linux target ops method "low_breakpoint_at". */ |
421530db | 300 | |
d7146cda TBA |
301 | bool |
302 | aarch64_target::low_breakpoint_at (CORE_ADDR where) | |
176eb98c | 303 | { |
db91f502 YQ |
304 | if (is_64bit_tdesc ()) |
305 | { | |
306 | gdb_byte insn[aarch64_breakpoint_len]; | |
176eb98c | 307 | |
d7146cda | 308 | read_memory (where, (unsigned char *) &insn, aarch64_breakpoint_len); |
db91f502 | 309 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) |
d7146cda | 310 | return true; |
176eb98c | 311 | |
d7146cda | 312 | return false; |
db91f502 YQ |
313 | } |
314 | else | |
315 | return arm_breakpoint_at (where); | |
176eb98c MS |
316 | } |
317 | ||
176eb98c MS |
318 | static void |
319 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
320 | { | |
321 | int i; | |
322 | ||
323 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
324 | { | |
325 | state->dr_addr_bp[i] = 0; | |
326 | state->dr_ctrl_bp[i] = 0; | |
327 | state->dr_ref_count_bp[i] = 0; | |
328 | } | |
329 | ||
330 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
331 | { | |
332 | state->dr_addr_wp[i] = 0; | |
333 | state->dr_ctrl_wp[i] = 0; | |
334 | state->dr_ref_count_wp[i] = 0; | |
335 | } | |
336 | } | |
337 | ||
176eb98c MS |
338 | /* Return the pointer to the debug register state structure in the |
339 | current process' arch-specific data area. */ | |
340 | ||
db3cb7cb | 341 | struct aarch64_debug_reg_state * |
88e2cf7e | 342 | aarch64_get_debug_reg_state (pid_t pid) |
176eb98c | 343 | { |
88e2cf7e | 344 | struct process_info *proc = find_process_pid (pid); |
176eb98c | 345 | |
fe978cb0 | 346 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
347 | } |
348 | ||
007c9b97 | 349 | /* Implementation of target ops method "supports_z_point_type". */ |
421530db | 350 | |
007c9b97 TBA |
351 | bool |
352 | aarch64_target::supports_z_point_type (char z_type) | |
4ff0d3d8 PA |
353 | { |
354 | switch (z_type) | |
355 | { | |
96c97461 | 356 | case Z_PACKET_SW_BP: |
4ff0d3d8 PA |
357 | case Z_PACKET_HW_BP: |
358 | case Z_PACKET_WRITE_WP: | |
359 | case Z_PACKET_READ_WP: | |
360 | case Z_PACKET_ACCESS_WP: | |
007c9b97 | 361 | return true; |
4ff0d3d8 | 362 | default: |
007c9b97 | 363 | return false; |
4ff0d3d8 PA |
364 | } |
365 | } | |
366 | ||
9db9aa23 | 367 | /* Implementation of linux target ops method "low_insert_point". |
176eb98c | 368 | |
421530db PL |
369 | It actually only records the info of the to-be-inserted bp/wp; |
370 | the actual insertion will happen when threads are resumed. */ | |
176eb98c | 371 | |
9db9aa23 TBA |
372 | int |
373 | aarch64_target::low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
374 | int len, raw_breakpoint *bp) | |
176eb98c MS |
375 | { |
376 | int ret; | |
4ff0d3d8 | 377 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
378 | struct aarch64_debug_reg_state *state |
379 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 380 | |
c5e92cca | 381 | if (show_debug_regs) |
176eb98c MS |
382 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
383 | (unsigned long) addr, len); | |
384 | ||
802e8e6d PA |
385 | /* Determine the type from the raw breakpoint type. */ |
386 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
387 | |
388 | if (targ_type != hw_execute) | |
39edd165 YQ |
389 | { |
390 | if (aarch64_linux_region_ok_for_watchpoint (addr, len)) | |
391 | ret = aarch64_handle_watchpoint (targ_type, addr, len, | |
392 | 1 /* is_insert */, state); | |
393 | else | |
394 | ret = -1; | |
395 | } | |
176eb98c | 396 | else |
8d689ee5 YQ |
397 | { |
398 | if (len == 3) | |
399 | { | |
400 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
401 | instruction. Set it to 2 to correctly encode length bit | |
402 | mask in hardware/watchpoint control register. */ | |
403 | len = 2; | |
404 | } | |
405 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
406 | 1 /* is_insert */, state); | |
407 | } | |
176eb98c | 408 | |
60a191ed | 409 | if (show_debug_regs) |
88e2cf7e YQ |
410 | aarch64_show_debug_reg_state (state, "insert_point", addr, len, |
411 | targ_type); | |
176eb98c MS |
412 | |
413 | return ret; | |
414 | } | |
415 | ||
9db9aa23 | 416 | /* Implementation of linux target ops method "low_remove_point". |
176eb98c | 417 | |
421530db PL |
418 | It actually only records the info of the to-be-removed bp/wp, |
419 | the actual removal will be done when threads are resumed. */ | |
176eb98c | 420 | |
9db9aa23 TBA |
421 | int |
422 | aarch64_target::low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
423 | int len, raw_breakpoint *bp) | |
176eb98c MS |
424 | { |
425 | int ret; | |
4ff0d3d8 | 426 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
427 | struct aarch64_debug_reg_state *state |
428 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 429 | |
c5e92cca | 430 | if (show_debug_regs) |
176eb98c MS |
431 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
432 | (unsigned long) addr, len); | |
433 | ||
802e8e6d PA |
434 | /* Determine the type from the raw breakpoint type. */ |
435 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
436 | |
437 | /* Set up state pointers. */ | |
438 | if (targ_type != hw_execute) | |
439 | ret = | |
c67ca4de YQ |
440 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
441 | state); | |
176eb98c | 442 | else |
8d689ee5 YQ |
443 | { |
444 | if (len == 3) | |
445 | { | |
446 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
447 | instruction. Set it to 2 to correctly encode length bit | |
448 | mask in hardware/watchpoint control register. */ | |
449 | len = 2; | |
450 | } | |
451 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
452 | 0 /* is_insert */, state); | |
453 | } | |
176eb98c | 454 | |
60a191ed | 455 | if (show_debug_regs) |
88e2cf7e YQ |
456 | aarch64_show_debug_reg_state (state, "remove_point", addr, len, |
457 | targ_type); | |
176eb98c MS |
458 | |
459 | return ret; | |
460 | } | |
461 | ||
19007d95 LM |
462 | /* Return the address only having significant bits. This is used to ignore |
463 | the top byte (TBI). */ | |
464 | ||
465 | static CORE_ADDR | |
466 | address_significant (CORE_ADDR addr) | |
467 | { | |
468 | /* Clear insignificant bits of a target address and sign extend resulting | |
469 | address. */ | |
470 | int addr_bit = 56; | |
471 | ||
472 | CORE_ADDR sign = (CORE_ADDR) 1 << (addr_bit - 1); | |
473 | addr &= ((CORE_ADDR) 1 << addr_bit) - 1; | |
474 | addr = (addr ^ sign) - sign; | |
475 | ||
476 | return addr; | |
477 | } | |
478 | ||
ac1bbaca | 479 | /* Implementation of linux target ops method "low_stopped_data_address". */ |
176eb98c | 480 | |
ac1bbaca TBA |
481 | CORE_ADDR |
482 | aarch64_target::low_stopped_data_address () | |
176eb98c MS |
483 | { |
484 | siginfo_t siginfo; | |
485 | int pid, i; | |
486 | struct aarch64_debug_reg_state *state; | |
487 | ||
0bfdf32f | 488 | pid = lwpid_of (current_thread); |
176eb98c MS |
489 | |
490 | /* Get the siginfo. */ | |
491 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
492 | return (CORE_ADDR) 0; | |
493 | ||
494 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
495 | if (siginfo.si_signo != SIGTRAP | |
496 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
497 | return (CORE_ADDR) 0; | |
498 | ||
19007d95 LM |
499 | /* Make sure to ignore the top byte, otherwise we may not recognize a |
500 | hardware watchpoint hit. The stopped data addresses coming from the | |
501 | kernel can potentially be tagged addresses. */ | |
502 | const CORE_ADDR addr_trap | |
503 | = address_significant ((CORE_ADDR) siginfo.si_addr); | |
504 | ||
176eb98c | 505 | /* Check if the address matches any watched address. */ |
88e2cf7e | 506 | state = aarch64_get_debug_reg_state (pid_of (current_thread)); |
176eb98c MS |
507 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) |
508 | { | |
a3b60e45 JK |
509 | const unsigned int offset |
510 | = aarch64_watchpoint_offset (state->dr_ctrl_wp[i]); | |
176eb98c | 511 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); |
a3b60e45 JK |
512 | const CORE_ADDR addr_watch = state->dr_addr_wp[i] + offset; |
513 | const CORE_ADDR addr_watch_aligned = align_down (state->dr_addr_wp[i], 8); | |
514 | const CORE_ADDR addr_orig = state->dr_addr_orig_wp[i]; | |
515 | ||
176eb98c MS |
516 | if (state->dr_ref_count_wp[i] |
517 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
a3b60e45 | 518 | && addr_trap >= addr_watch_aligned |
176eb98c | 519 | && addr_trap < addr_watch + len) |
a3b60e45 JK |
520 | { |
521 | /* ADDR_TRAP reports the first address of the memory range | |
522 | accessed by the CPU, regardless of what was the memory | |
523 | range watched. Thus, a large CPU access that straddles | |
524 | the ADDR_WATCH..ADDR_WATCH+LEN range may result in an | |
525 | ADDR_TRAP that is lower than the | |
526 | ADDR_WATCH..ADDR_WATCH+LEN range. E.g.: | |
527 | ||
528 | addr: | 4 | 5 | 6 | 7 | 8 | | |
529 | |---- range watched ----| | |
530 | |----------- range accessed ------------| | |
531 | ||
532 | In this case, ADDR_TRAP will be 4. | |
533 | ||
534 | To match a watchpoint known to GDB core, we must never | |
535 | report *ADDR_P outside of any ADDR_WATCH..ADDR_WATCH+LEN | |
536 | range. ADDR_WATCH <= ADDR_TRAP < ADDR_ORIG is a false | |
537 | positive on kernels older than 4.10. See PR | |
538 | external/20207. */ | |
539 | return addr_orig; | |
540 | } | |
176eb98c MS |
541 | } |
542 | ||
543 | return (CORE_ADDR) 0; | |
544 | } | |
545 | ||
ac1bbaca | 546 | /* Implementation of linux target ops method "low_stopped_by_watchpoint". */ |
176eb98c | 547 | |
ac1bbaca TBA |
548 | bool |
549 | aarch64_target::low_stopped_by_watchpoint () | |
176eb98c | 550 | { |
ac1bbaca | 551 | return (low_stopped_data_address () != 0); |
176eb98c MS |
552 | } |
553 | ||
554 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
555 | ||
556 | ps_err_e | |
754653a7 | 557 | ps_get_thread_area (struct ps_prochandle *ph, |
176eb98c MS |
558 | lwpid_t lwpid, int idx, void **base) |
559 | { | |
a0cc84cd YQ |
560 | return aarch64_ps_get_thread_area (ph, lwpid, idx, base, |
561 | is_64bit_tdesc ()); | |
176eb98c MS |
562 | } |
563 | ||
cb63de7c | 564 | /* Implementation of linux target ops method "low_siginfo_fixup". */ |
ade90bde | 565 | |
cb63de7c TBA |
566 | bool |
567 | aarch64_target::low_siginfo_fixup (siginfo_t *native, gdb_byte *inf, | |
568 | int direction) | |
ade90bde YQ |
569 | { |
570 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ | |
571 | if (!is_64bit_tdesc ()) | |
572 | { | |
573 | if (direction == 0) | |
574 | aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, | |
575 | native); | |
576 | else | |
577 | aarch64_siginfo_from_compat_siginfo (native, | |
578 | (struct compat_siginfo *) inf); | |
579 | ||
cb63de7c | 580 | return true; |
ade90bde YQ |
581 | } |
582 | ||
cb63de7c | 583 | return false; |
ade90bde YQ |
584 | } |
585 | ||
fd000fb3 | 586 | /* Implementation of linux target ops method "low_new_process". */ |
176eb98c | 587 | |
fd000fb3 TBA |
588 | arch_process_info * |
589 | aarch64_target::low_new_process () | |
176eb98c | 590 | { |
8d749320 | 591 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
176eb98c MS |
592 | |
593 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
594 | ||
595 | return info; | |
596 | } | |
597 | ||
fd000fb3 | 598 | /* Implementation of linux target ops method "low_delete_process". */ |
04ec7890 | 599 | |
fd000fb3 TBA |
600 | void |
601 | aarch64_target::low_delete_process (arch_process_info *info) | |
04ec7890 SM |
602 | { |
603 | xfree (info); | |
604 | } | |
605 | ||
fd000fb3 TBA |
606 | void |
607 | aarch64_target::low_new_thread (lwp_info *lwp) | |
608 | { | |
609 | aarch64_linux_new_thread (lwp); | |
610 | } | |
421530db | 611 | |
fd000fb3 TBA |
612 | void |
613 | aarch64_target::low_delete_thread (arch_lwp_info *arch_lwp) | |
614 | { | |
615 | aarch64_linux_delete_thread (arch_lwp); | |
616 | } | |
617 | ||
618 | /* Implementation of linux target ops method "low_new_fork". */ | |
619 | ||
620 | void | |
621 | aarch64_target::low_new_fork (process_info *parent, | |
622 | process_info *child) | |
3a8a0396 DB |
623 | { |
624 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
625 | gdb_assert (parent->priv != NULL |
626 | && parent->priv->arch_private != NULL); | |
627 | gdb_assert (child->priv != NULL | |
628 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
629 | |
630 | /* Linux kernel before 2.6.33 commit | |
631 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
632 | will inherit hardware debug registers from parent | |
633 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
634 | zeroed debug registers. | |
635 | ||
636 | GDB core assumes the child inherits the watchpoints/hw | |
637 | breakpoints of the parent, and will remove them all from the | |
638 | forked off process. Copy the debug registers mirrors into the | |
639 | new process so that all breakpoints and watchpoints can be | |
640 | removed together. The debug registers mirror will become zeroed | |
641 | in the end before detaching the forked off process, thus making | |
642 | this compatible with older Linux kernels too. */ | |
643 | ||
61a7418c | 644 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
645 | } |
646 | ||
ee4fbcfa AH |
647 | /* Matches HWCAP_PACA in kernel header arch/arm64/include/uapi/asm/hwcap.h. */ |
648 | #define AARCH64_HWCAP_PACA (1 << 30) | |
649 | ||
797bcff5 | 650 | /* Implementation of linux target ops method "low_arch_setup". */ |
3b53ae99 | 651 | |
797bcff5 TBA |
652 | void |
653 | aarch64_target::low_arch_setup () | |
3b53ae99 YQ |
654 | { |
655 | unsigned int machine; | |
656 | int is_elf64; | |
657 | int tid; | |
658 | ||
659 | tid = lwpid_of (current_thread); | |
660 | ||
661 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
662 | ||
663 | if (is_elf64) | |
fefa175e AH |
664 | { |
665 | uint64_t vq = aarch64_sve_get_vq (tid); | |
974c89e0 | 666 | unsigned long hwcap = linux_get_hwcap (8); |
c1bd443b | 667 | unsigned long hwcap2 = linux_get_hwcap2 (8); |
974c89e0 | 668 | bool pauth_p = hwcap & AARCH64_HWCAP_PACA; |
c1bd443b LM |
669 | /* MTE is AArch64-only. */ |
670 | bool mte_p = hwcap2 & HWCAP2_MTE; | |
ee4fbcfa | 671 | |
c1bd443b LM |
672 | current_process ()->tdesc |
673 | = aarch64_linux_read_description (vq, pauth_p, mte_p); | |
fefa175e | 674 | } |
3b53ae99 | 675 | else |
7cc17433 | 676 | current_process ()->tdesc = aarch32_linux_read_description (); |
176eb98c | 677 | |
af1b22f3 | 678 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
679 | } |
680 | ||
02895270 AH |
681 | /* Wrapper for aarch64_sve_regs_copy_to_reg_buf. */ |
682 | ||
683 | static void | |
684 | aarch64_sve_regs_copy_to_regcache (struct regcache *regcache, const void *buf) | |
685 | { | |
686 | return aarch64_sve_regs_copy_to_reg_buf (regcache, buf); | |
687 | } | |
688 | ||
689 | /* Wrapper for aarch64_sve_regs_copy_from_reg_buf. */ | |
690 | ||
691 | static void | |
692 | aarch64_sve_regs_copy_from_regcache (struct regcache *regcache, void *buf) | |
693 | { | |
694 | return aarch64_sve_regs_copy_from_reg_buf (regcache, buf); | |
695 | } | |
696 | ||
3aee8918 | 697 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
698 | { |
699 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
700 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
701 | aarch64_fill_gregset, aarch64_store_gregset }, | |
702 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
703 | sizeof (struct user_fpsimd_state), FP_REGS, | |
704 | aarch64_fill_fpregset, aarch64_store_fpregset | |
705 | }, | |
1ef53e6b AH |
706 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
707 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
708 | NULL, aarch64_store_pauthregset }, | |
50bc912a | 709 | NULL_REGSET |
176eb98c MS |
710 | }; |
711 | ||
3aee8918 PA |
712 | static struct regsets_info aarch64_regsets_info = |
713 | { | |
714 | aarch64_regsets, /* regsets */ | |
715 | 0, /* num_regsets */ | |
716 | NULL, /* disabled_regsets */ | |
717 | }; | |
718 | ||
3b53ae99 | 719 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
720 | { |
721 | NULL, /* regset_bitmap */ | |
c2d65f38 | 722 | NULL, /* usrregs */ |
3aee8918 PA |
723 | &aarch64_regsets_info, |
724 | }; | |
725 | ||
02895270 AH |
726 | static struct regset_info aarch64_sve_regsets[] = |
727 | { | |
728 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
729 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
730 | aarch64_fill_gregset, aarch64_store_gregset }, | |
731 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_SVE, | |
732 | SVE_PT_SIZE (AARCH64_MAX_SVE_VQ, SVE_PT_REGS_SVE), EXTENDED_REGS, | |
733 | aarch64_sve_regs_copy_from_regcache, aarch64_sve_regs_copy_to_regcache | |
734 | }, | |
1ef53e6b AH |
735 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
736 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
737 | NULL, aarch64_store_pauthregset }, | |
02895270 AH |
738 | NULL_REGSET |
739 | }; | |
740 | ||
741 | static struct regsets_info aarch64_sve_regsets_info = | |
742 | { | |
743 | aarch64_sve_regsets, /* regsets. */ | |
744 | 0, /* num_regsets. */ | |
745 | NULL, /* disabled_regsets. */ | |
746 | }; | |
747 | ||
748 | static struct regs_info regs_info_aarch64_sve = | |
749 | { | |
750 | NULL, /* regset_bitmap. */ | |
751 | NULL, /* usrregs. */ | |
752 | &aarch64_sve_regsets_info, | |
753 | }; | |
754 | ||
aa8d21c9 | 755 | /* Implementation of linux target ops method "get_regs_info". */ |
421530db | 756 | |
aa8d21c9 TBA |
757 | const regs_info * |
758 | aarch64_target::get_regs_info () | |
3aee8918 | 759 | { |
02895270 | 760 | if (!is_64bit_tdesc ()) |
3b53ae99 | 761 | return ®s_info_aarch32; |
02895270 AH |
762 | |
763 | if (is_sve_tdesc ()) | |
764 | return ®s_info_aarch64_sve; | |
765 | ||
766 | return ®s_info_aarch64; | |
3aee8918 PA |
767 | } |
768 | ||
47f70aa7 | 769 | /* Implementation of target ops method "supports_tracepoints". */ |
7671bf47 | 770 | |
47f70aa7 TBA |
771 | bool |
772 | aarch64_target::supports_tracepoints () | |
7671bf47 | 773 | { |
524b57e6 | 774 | if (current_thread == NULL) |
47f70aa7 | 775 | return true; |
524b57e6 YQ |
776 | else |
777 | { | |
778 | /* We don't support tracepoints on aarch32 now. */ | |
779 | return is_64bit_tdesc (); | |
780 | } | |
7671bf47 PL |
781 | } |
782 | ||
13e567af | 783 | /* Implementation of linux target ops method "low_get_thread_area". */ |
bb903df0 | 784 | |
13e567af TBA |
785 | int |
786 | aarch64_target::low_get_thread_area (int lwpid, CORE_ADDR *addrp) | |
bb903df0 PL |
787 | { |
788 | struct iovec iovec; | |
789 | uint64_t reg; | |
790 | ||
791 | iovec.iov_base = ® | |
792 | iovec.iov_len = sizeof (reg); | |
793 | ||
794 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
795 | return -1; | |
796 | ||
797 | *addrp = reg; | |
798 | ||
799 | return 0; | |
800 | } | |
801 | ||
9eedd27d TBA |
802 | bool |
803 | aarch64_target::low_supports_catch_syscall () | |
804 | { | |
805 | return true; | |
806 | } | |
061fc021 | 807 | |
9eedd27d TBA |
808 | /* Implementation of linux target ops method "low_get_syscall_trapinfo". */ |
809 | ||
810 | void | |
811 | aarch64_target::low_get_syscall_trapinfo (regcache *regcache, int *sysno) | |
061fc021 YQ |
812 | { |
813 | int use_64bit = register_size (regcache->tdesc, 0) == 8; | |
814 | ||
815 | if (use_64bit) | |
816 | { | |
817 | long l_sysno; | |
818 | ||
819 | collect_register_by_name (regcache, "x8", &l_sysno); | |
820 | *sysno = (int) l_sysno; | |
821 | } | |
822 | else | |
823 | collect_register_by_name (regcache, "r7", sysno); | |
824 | } | |
825 | ||
afbe19f8 PL |
826 | /* List of condition codes that we need. */ |
827 | ||
828 | enum aarch64_condition_codes | |
829 | { | |
830 | EQ = 0x0, | |
831 | NE = 0x1, | |
832 | LO = 0x3, | |
833 | GE = 0xa, | |
834 | LT = 0xb, | |
835 | GT = 0xc, | |
836 | LE = 0xd, | |
bb903df0 PL |
837 | }; |
838 | ||
6c1c9a8b YQ |
839 | enum aarch64_operand_type |
840 | { | |
841 | OPERAND_IMMEDIATE, | |
842 | OPERAND_REGISTER, | |
843 | }; | |
844 | ||
bb903df0 PL |
845 | /* Representation of an operand. At this time, it only supports register |
846 | and immediate types. */ | |
847 | ||
848 | struct aarch64_operand | |
849 | { | |
850 | /* Type of the operand. */ | |
6c1c9a8b YQ |
851 | enum aarch64_operand_type type; |
852 | ||
bb903df0 PL |
853 | /* Value of the operand according to the type. */ |
854 | union | |
855 | { | |
856 | uint32_t imm; | |
857 | struct aarch64_register reg; | |
858 | }; | |
859 | }; | |
860 | ||
861 | /* List of registers that we are currently using, we can add more here as | |
862 | we need to use them. */ | |
863 | ||
864 | /* General purpose scratch registers (64 bit). */ | |
865 | static const struct aarch64_register x0 = { 0, 1 }; | |
866 | static const struct aarch64_register x1 = { 1, 1 }; | |
867 | static const struct aarch64_register x2 = { 2, 1 }; | |
868 | static const struct aarch64_register x3 = { 3, 1 }; | |
869 | static const struct aarch64_register x4 = { 4, 1 }; | |
870 | ||
871 | /* General purpose scratch registers (32 bit). */ | |
afbe19f8 | 872 | static const struct aarch64_register w0 = { 0, 0 }; |
bb903df0 PL |
873 | static const struct aarch64_register w2 = { 2, 0 }; |
874 | ||
875 | /* Intra-procedure scratch registers. */ | |
876 | static const struct aarch64_register ip0 = { 16, 1 }; | |
877 | ||
878 | /* Special purpose registers. */ | |
afbe19f8 PL |
879 | static const struct aarch64_register fp = { 29, 1 }; |
880 | static const struct aarch64_register lr = { 30, 1 }; | |
bb903df0 PL |
881 | static const struct aarch64_register sp = { 31, 1 }; |
882 | static const struct aarch64_register xzr = { 31, 1 }; | |
883 | ||
884 | /* Dynamically allocate a new register. If we know the register | |
885 | statically, we should make it a global as above instead of using this | |
886 | helper function. */ | |
887 | ||
888 | static struct aarch64_register | |
889 | aarch64_register (unsigned num, int is64) | |
890 | { | |
891 | return (struct aarch64_register) { num, is64 }; | |
892 | } | |
893 | ||
894 | /* Helper function to create a register operand, for instructions with | |
895 | different types of operands. | |
896 | ||
897 | For example: | |
898 | p += emit_mov (p, x0, register_operand (x1)); */ | |
899 | ||
900 | static struct aarch64_operand | |
901 | register_operand (struct aarch64_register reg) | |
902 | { | |
903 | struct aarch64_operand operand; | |
904 | ||
905 | operand.type = OPERAND_REGISTER; | |
906 | operand.reg = reg; | |
907 | ||
908 | return operand; | |
909 | } | |
910 | ||
911 | /* Helper function to create an immediate operand, for instructions with | |
912 | different types of operands. | |
913 | ||
914 | For example: | |
915 | p += emit_mov (p, x0, immediate_operand (12)); */ | |
916 | ||
917 | static struct aarch64_operand | |
918 | immediate_operand (uint32_t imm) | |
919 | { | |
920 | struct aarch64_operand operand; | |
921 | ||
922 | operand.type = OPERAND_IMMEDIATE; | |
923 | operand.imm = imm; | |
924 | ||
925 | return operand; | |
926 | } | |
927 | ||
bb903df0 PL |
928 | /* Helper function to create an offset memory operand. |
929 | ||
930 | For example: | |
931 | p += emit_ldr (p, x0, sp, offset_memory_operand (16)); */ | |
932 | ||
933 | static struct aarch64_memory_operand | |
934 | offset_memory_operand (int32_t offset) | |
935 | { | |
936 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_OFFSET, offset }; | |
937 | } | |
938 | ||
939 | /* Helper function to create a pre-index memory operand. | |
940 | ||
941 | For example: | |
942 | p += emit_ldr (p, x0, sp, preindex_memory_operand (16)); */ | |
943 | ||
944 | static struct aarch64_memory_operand | |
945 | preindex_memory_operand (int32_t index) | |
946 | { | |
947 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_PREINDEX, index }; | |
948 | } | |
949 | ||
afbe19f8 PL |
950 | /* Helper function to create a post-index memory operand. |
951 | ||
952 | For example: | |
953 | p += emit_ldr (p, x0, sp, postindex_memory_operand (16)); */ | |
954 | ||
955 | static struct aarch64_memory_operand | |
956 | postindex_memory_operand (int32_t index) | |
957 | { | |
958 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_POSTINDEX, index }; | |
959 | } | |
960 | ||
bb903df0 PL |
961 | /* System control registers. These special registers can be written and |
962 | read with the MRS and MSR instructions. | |
963 | ||
964 | - NZCV: Condition flags. GDB refers to this register under the CPSR | |
965 | name. | |
966 | - FPSR: Floating-point status register. | |
967 | - FPCR: Floating-point control registers. | |
968 | - TPIDR_EL0: Software thread ID register. */ | |
969 | ||
970 | enum aarch64_system_control_registers | |
971 | { | |
972 | /* op0 op1 crn crm op2 */ | |
973 | NZCV = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x2 << 3) | 0x0, | |
974 | FPSR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x1, | |
975 | FPCR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x0, | |
976 | TPIDR_EL0 = (0x1 << 14) | (0x3 << 11) | (0xd << 7) | (0x0 << 3) | 0x2 | |
977 | }; | |
978 | ||
bb903df0 PL |
979 | /* Write a BLR instruction into *BUF. |
980 | ||
981 | BLR rn | |
982 | ||
983 | RN is the register to branch to. */ | |
984 | ||
985 | static int | |
986 | emit_blr (uint32_t *buf, struct aarch64_register rn) | |
987 | { | |
e1c587c3 | 988 | return aarch64_emit_insn (buf, BLR | ENCODE (rn.num, 5, 5)); |
bb903df0 PL |
989 | } |
990 | ||
afbe19f8 | 991 | /* Write a RET instruction into *BUF. |
bb903df0 | 992 | |
afbe19f8 | 993 | RET xn |
bb903df0 | 994 | |
afbe19f8 | 995 | RN is the register to branch to. */ |
bb903df0 PL |
996 | |
997 | static int | |
afbe19f8 PL |
998 | emit_ret (uint32_t *buf, struct aarch64_register rn) |
999 | { | |
e1c587c3 | 1000 | return aarch64_emit_insn (buf, RET | ENCODE (rn.num, 5, 5)); |
afbe19f8 PL |
1001 | } |
1002 | ||
1003 | static int | |
1004 | emit_load_store_pair (uint32_t *buf, enum aarch64_opcodes opcode, | |
1005 | struct aarch64_register rt, | |
1006 | struct aarch64_register rt2, | |
1007 | struct aarch64_register rn, | |
1008 | struct aarch64_memory_operand operand) | |
bb903df0 PL |
1009 | { |
1010 | uint32_t opc; | |
1011 | uint32_t pre_index; | |
1012 | uint32_t write_back; | |
1013 | ||
1014 | if (rt.is64) | |
1015 | opc = ENCODE (2, 2, 30); | |
1016 | else | |
1017 | opc = ENCODE (0, 2, 30); | |
1018 | ||
1019 | switch (operand.type) | |
1020 | { | |
1021 | case MEMORY_OPERAND_OFFSET: | |
1022 | { | |
1023 | pre_index = ENCODE (1, 1, 24); | |
1024 | write_back = ENCODE (0, 1, 23); | |
1025 | break; | |
1026 | } | |
afbe19f8 PL |
1027 | case MEMORY_OPERAND_POSTINDEX: |
1028 | { | |
1029 | pre_index = ENCODE (0, 1, 24); | |
1030 | write_back = ENCODE (1, 1, 23); | |
1031 | break; | |
1032 | } | |
bb903df0 PL |
1033 | case MEMORY_OPERAND_PREINDEX: |
1034 | { | |
1035 | pre_index = ENCODE (1, 1, 24); | |
1036 | write_back = ENCODE (1, 1, 23); | |
1037 | break; | |
1038 | } | |
1039 | default: | |
1040 | return 0; | |
1041 | } | |
1042 | ||
e1c587c3 YQ |
1043 | return aarch64_emit_insn (buf, opcode | opc | pre_index | write_back |
1044 | | ENCODE (operand.index >> 3, 7, 15) | |
1045 | | ENCODE (rt2.num, 5, 10) | |
1046 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1047 | } |
1048 | ||
afbe19f8 PL |
1049 | /* Write a STP instruction into *BUF. |
1050 | ||
1051 | STP rt, rt2, [rn, #offset] | |
1052 | STP rt, rt2, [rn, #index]! | |
1053 | STP rt, rt2, [rn], #index | |
1054 | ||
1055 | RT and RT2 are the registers to store. | |
1056 | RN is the base address register. | |
1057 | OFFSET is the immediate to add to the base address. It is limited to a | |
1058 | -512 .. 504 range (7 bits << 3). */ | |
1059 | ||
1060 | static int | |
1061 | emit_stp (uint32_t *buf, struct aarch64_register rt, | |
1062 | struct aarch64_register rt2, struct aarch64_register rn, | |
1063 | struct aarch64_memory_operand operand) | |
1064 | { | |
1065 | return emit_load_store_pair (buf, STP, rt, rt2, rn, operand); | |
1066 | } | |
1067 | ||
1068 | /* Write a LDP instruction into *BUF. | |
1069 | ||
1070 | LDP rt, rt2, [rn, #offset] | |
1071 | LDP rt, rt2, [rn, #index]! | |
1072 | LDP rt, rt2, [rn], #index | |
1073 | ||
1074 | RT and RT2 are the registers to store. | |
1075 | RN is the base address register. | |
1076 | OFFSET is the immediate to add to the base address. It is limited to a | |
1077 | -512 .. 504 range (7 bits << 3). */ | |
1078 | ||
1079 | static int | |
1080 | emit_ldp (uint32_t *buf, struct aarch64_register rt, | |
1081 | struct aarch64_register rt2, struct aarch64_register rn, | |
1082 | struct aarch64_memory_operand operand) | |
1083 | { | |
1084 | return emit_load_store_pair (buf, LDP, rt, rt2, rn, operand); | |
1085 | } | |
1086 | ||
bb903df0 PL |
1087 | /* Write a LDP (SIMD&VFP) instruction using Q registers into *BUF. |
1088 | ||
1089 | LDP qt, qt2, [rn, #offset] | |
1090 | ||
1091 | RT and RT2 are the Q registers to store. | |
1092 | RN is the base address register. | |
1093 | OFFSET is the immediate to add to the base address. It is limited to | |
1094 | -1024 .. 1008 range (7 bits << 4). */ | |
1095 | ||
1096 | static int | |
1097 | emit_ldp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
1098 | struct aarch64_register rn, int32_t offset) | |
1099 | { | |
1100 | uint32_t opc = ENCODE (2, 2, 30); | |
1101 | uint32_t pre_index = ENCODE (1, 1, 24); | |
1102 | ||
e1c587c3 YQ |
1103 | return aarch64_emit_insn (buf, LDP_SIMD_VFP | opc | pre_index |
1104 | | ENCODE (offset >> 4, 7, 15) | |
1105 | | ENCODE (rt2, 5, 10) | |
1106 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1107 | } |
1108 | ||
1109 | /* Write a STP (SIMD&VFP) instruction using Q registers into *BUF. | |
1110 | ||
1111 | STP qt, qt2, [rn, #offset] | |
1112 | ||
1113 | RT and RT2 are the Q registers to store. | |
1114 | RN is the base address register. | |
1115 | OFFSET is the immediate to add to the base address. It is limited to | |
1116 | -1024 .. 1008 range (7 bits << 4). */ | |
1117 | ||
1118 | static int | |
1119 | emit_stp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
1120 | struct aarch64_register rn, int32_t offset) | |
1121 | { | |
1122 | uint32_t opc = ENCODE (2, 2, 30); | |
1123 | uint32_t pre_index = ENCODE (1, 1, 24); | |
1124 | ||
e1c587c3 | 1125 | return aarch64_emit_insn (buf, STP_SIMD_VFP | opc | pre_index |
b6542f81 YQ |
1126 | | ENCODE (offset >> 4, 7, 15) |
1127 | | ENCODE (rt2, 5, 10) | |
1128 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1129 | } |
1130 | ||
afbe19f8 PL |
1131 | /* Write a LDRH instruction into *BUF. |
1132 | ||
1133 | LDRH wt, [xn, #offset] | |
1134 | LDRH wt, [xn, #index]! | |
1135 | LDRH wt, [xn], #index | |
1136 | ||
1137 | RT is the register to store. | |
1138 | RN is the base address register. | |
1139 | OFFSET is the immediate to add to the base address. It is limited to | |
1140 | 0 .. 32760 range (12 bits << 3). */ | |
1141 | ||
1142 | static int | |
1143 | emit_ldrh (uint32_t *buf, struct aarch64_register rt, | |
1144 | struct aarch64_register rn, | |
1145 | struct aarch64_memory_operand operand) | |
1146 | { | |
1c2e1515 | 1147 | return aarch64_emit_load_store (buf, 1, LDR, rt, rn, operand); |
afbe19f8 PL |
1148 | } |
1149 | ||
1150 | /* Write a LDRB instruction into *BUF. | |
1151 | ||
1152 | LDRB wt, [xn, #offset] | |
1153 | LDRB wt, [xn, #index]! | |
1154 | LDRB wt, [xn], #index | |
1155 | ||
1156 | RT is the register to store. | |
1157 | RN is the base address register. | |
1158 | OFFSET is the immediate to add to the base address. It is limited to | |
1159 | 0 .. 32760 range (12 bits << 3). */ | |
1160 | ||
1161 | static int | |
1162 | emit_ldrb (uint32_t *buf, struct aarch64_register rt, | |
1163 | struct aarch64_register rn, | |
1164 | struct aarch64_memory_operand operand) | |
1165 | { | |
1c2e1515 | 1166 | return aarch64_emit_load_store (buf, 0, LDR, rt, rn, operand); |
afbe19f8 PL |
1167 | } |
1168 | ||
bb903df0 | 1169 | |
bb903df0 PL |
1170 | |
1171 | /* Write a STR instruction into *BUF. | |
1172 | ||
1173 | STR rt, [rn, #offset] | |
1174 | STR rt, [rn, #index]! | |
afbe19f8 | 1175 | STR rt, [rn], #index |
bb903df0 PL |
1176 | |
1177 | RT is the register to store. | |
1178 | RN is the base address register. | |
1179 | OFFSET is the immediate to add to the base address. It is limited to | |
1180 | 0 .. 32760 range (12 bits << 3). */ | |
1181 | ||
1182 | static int | |
1183 | emit_str (uint32_t *buf, struct aarch64_register rt, | |
1184 | struct aarch64_register rn, | |
1185 | struct aarch64_memory_operand operand) | |
1186 | { | |
1c2e1515 | 1187 | return aarch64_emit_load_store (buf, rt.is64 ? 3 : 2, STR, rt, rn, operand); |
bb903df0 PL |
1188 | } |
1189 | ||
1190 | /* Helper function emitting an exclusive load or store instruction. */ | |
1191 | ||
1192 | static int | |
1193 | emit_load_store_exclusive (uint32_t *buf, uint32_t size, | |
1194 | enum aarch64_opcodes opcode, | |
1195 | struct aarch64_register rs, | |
1196 | struct aarch64_register rt, | |
1197 | struct aarch64_register rt2, | |
1198 | struct aarch64_register rn) | |
1199 | { | |
e1c587c3 YQ |
1200 | return aarch64_emit_insn (buf, opcode | ENCODE (size, 2, 30) |
1201 | | ENCODE (rs.num, 5, 16) | ENCODE (rt2.num, 5, 10) | |
1202 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1203 | } |
1204 | ||
1205 | /* Write a LAXR instruction into *BUF. | |
1206 | ||
1207 | LDAXR rt, [xn] | |
1208 | ||
1209 | RT is the destination register. | |
1210 | RN is the base address register. */ | |
1211 | ||
1212 | static int | |
1213 | emit_ldaxr (uint32_t *buf, struct aarch64_register rt, | |
1214 | struct aarch64_register rn) | |
1215 | { | |
1216 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, LDAXR, xzr, rt, | |
1217 | xzr, rn); | |
1218 | } | |
1219 | ||
1220 | /* Write a STXR instruction into *BUF. | |
1221 | ||
1222 | STXR ws, rt, [xn] | |
1223 | ||
1224 | RS is the result register, it indicates if the store succeeded or not. | |
1225 | RT is the destination register. | |
1226 | RN is the base address register. */ | |
1227 | ||
1228 | static int | |
1229 | emit_stxr (uint32_t *buf, struct aarch64_register rs, | |
1230 | struct aarch64_register rt, struct aarch64_register rn) | |
1231 | { | |
1232 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STXR, rs, rt, | |
1233 | xzr, rn); | |
1234 | } | |
1235 | ||
1236 | /* Write a STLR instruction into *BUF. | |
1237 | ||
1238 | STLR rt, [xn] | |
1239 | ||
1240 | RT is the register to store. | |
1241 | RN is the base address register. */ | |
1242 | ||
1243 | static int | |
1244 | emit_stlr (uint32_t *buf, struct aarch64_register rt, | |
1245 | struct aarch64_register rn) | |
1246 | { | |
1247 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STLR, xzr, rt, | |
1248 | xzr, rn); | |
1249 | } | |
1250 | ||
1251 | /* Helper function for data processing instructions with register sources. */ | |
1252 | ||
1253 | static int | |
231c0592 | 1254 | emit_data_processing_reg (uint32_t *buf, uint32_t opcode, |
bb903df0 PL |
1255 | struct aarch64_register rd, |
1256 | struct aarch64_register rn, | |
1257 | struct aarch64_register rm) | |
1258 | { | |
1259 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1260 | ||
e1c587c3 YQ |
1261 | return aarch64_emit_insn (buf, opcode | size | ENCODE (rm.num, 5, 16) |
1262 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1263 | } |
1264 | ||
1265 | /* Helper function for data processing instructions taking either a register | |
1266 | or an immediate. */ | |
1267 | ||
1268 | static int | |
1269 | emit_data_processing (uint32_t *buf, enum aarch64_opcodes opcode, | |
1270 | struct aarch64_register rd, | |
1271 | struct aarch64_register rn, | |
1272 | struct aarch64_operand operand) | |
1273 | { | |
1274 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1275 | /* The opcode is different for register and immediate source operands. */ | |
1276 | uint32_t operand_opcode; | |
1277 | ||
1278 | if (operand.type == OPERAND_IMMEDIATE) | |
1279 | { | |
1280 | /* xxx1 000x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1281 | operand_opcode = ENCODE (8, 4, 25); | |
1282 | ||
e1c587c3 YQ |
1283 | return aarch64_emit_insn (buf, opcode | operand_opcode | size |
1284 | | ENCODE (operand.imm, 12, 10) | |
1285 | | ENCODE (rn.num, 5, 5) | |
1286 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1287 | } |
1288 | else | |
1289 | { | |
1290 | /* xxx0 101x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1291 | operand_opcode = ENCODE (5, 4, 25); | |
1292 | ||
1293 | return emit_data_processing_reg (buf, opcode | operand_opcode, rd, | |
1294 | rn, operand.reg); | |
1295 | } | |
1296 | } | |
1297 | ||
1298 | /* Write an ADD instruction into *BUF. | |
1299 | ||
1300 | ADD rd, rn, #imm | |
1301 | ADD rd, rn, rm | |
1302 | ||
1303 | This function handles both an immediate and register add. | |
1304 | ||
1305 | RD is the destination register. | |
1306 | RN is the input register. | |
1307 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1308 | OPERAND_REGISTER. */ | |
1309 | ||
1310 | static int | |
1311 | emit_add (uint32_t *buf, struct aarch64_register rd, | |
1312 | struct aarch64_register rn, struct aarch64_operand operand) | |
1313 | { | |
1314 | return emit_data_processing (buf, ADD, rd, rn, operand); | |
1315 | } | |
1316 | ||
1317 | /* Write a SUB instruction into *BUF. | |
1318 | ||
1319 | SUB rd, rn, #imm | |
1320 | SUB rd, rn, rm | |
1321 | ||
1322 | This function handles both an immediate and register sub. | |
1323 | ||
1324 | RD is the destination register. | |
1325 | RN is the input register. | |
1326 | IMM is the immediate to substract to RN. */ | |
1327 | ||
1328 | static int | |
1329 | emit_sub (uint32_t *buf, struct aarch64_register rd, | |
1330 | struct aarch64_register rn, struct aarch64_operand operand) | |
1331 | { | |
1332 | return emit_data_processing (buf, SUB, rd, rn, operand); | |
1333 | } | |
1334 | ||
1335 | /* Write a MOV instruction into *BUF. | |
1336 | ||
1337 | MOV rd, #imm | |
1338 | MOV rd, rm | |
1339 | ||
1340 | This function handles both a wide immediate move and a register move, | |
1341 | with the condition that the source register is not xzr. xzr and the | |
1342 | stack pointer share the same encoding and this function only supports | |
1343 | the stack pointer. | |
1344 | ||
1345 | RD is the destination register. | |
1346 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1347 | OPERAND_REGISTER. */ | |
1348 | ||
1349 | static int | |
1350 | emit_mov (uint32_t *buf, struct aarch64_register rd, | |
1351 | struct aarch64_operand operand) | |
1352 | { | |
1353 | if (operand.type == OPERAND_IMMEDIATE) | |
1354 | { | |
1355 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1356 | /* Do not shift the immediate. */ | |
1357 | uint32_t shift = ENCODE (0, 2, 21); | |
1358 | ||
e1c587c3 YQ |
1359 | return aarch64_emit_insn (buf, MOV | size | shift |
1360 | | ENCODE (operand.imm, 16, 5) | |
1361 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1362 | } |
1363 | else | |
1364 | return emit_add (buf, rd, operand.reg, immediate_operand (0)); | |
1365 | } | |
1366 | ||
1367 | /* Write a MOVK instruction into *BUF. | |
1368 | ||
1369 | MOVK rd, #imm, lsl #shift | |
1370 | ||
1371 | RD is the destination register. | |
1372 | IMM is the immediate. | |
1373 | SHIFT is the logical shift left to apply to IMM. */ | |
1374 | ||
1375 | static int | |
7781c06f YQ |
1376 | emit_movk (uint32_t *buf, struct aarch64_register rd, uint32_t imm, |
1377 | unsigned shift) | |
bb903df0 PL |
1378 | { |
1379 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1380 | ||
e1c587c3 YQ |
1381 | return aarch64_emit_insn (buf, MOVK | size | ENCODE (shift, 2, 21) | |
1382 | ENCODE (imm, 16, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1383 | } |
1384 | ||
1385 | /* Write instructions into *BUF in order to move ADDR into a register. | |
1386 | ADDR can be a 64-bit value. | |
1387 | ||
1388 | This function will emit a series of MOV and MOVK instructions, such as: | |
1389 | ||
1390 | MOV xd, #(addr) | |
1391 | MOVK xd, #(addr >> 16), lsl #16 | |
1392 | MOVK xd, #(addr >> 32), lsl #32 | |
1393 | MOVK xd, #(addr >> 48), lsl #48 */ | |
1394 | ||
1395 | static int | |
1396 | emit_mov_addr (uint32_t *buf, struct aarch64_register rd, CORE_ADDR addr) | |
1397 | { | |
1398 | uint32_t *p = buf; | |
1399 | ||
1400 | /* The MOV (wide immediate) instruction clears to top bits of the | |
1401 | register. */ | |
1402 | p += emit_mov (p, rd, immediate_operand (addr & 0xffff)); | |
1403 | ||
1404 | if ((addr >> 16) != 0) | |
1405 | p += emit_movk (p, rd, (addr >> 16) & 0xffff, 1); | |
1406 | else | |
1407 | return p - buf; | |
1408 | ||
1409 | if ((addr >> 32) != 0) | |
1410 | p += emit_movk (p, rd, (addr >> 32) & 0xffff, 2); | |
1411 | else | |
1412 | return p - buf; | |
1413 | ||
1414 | if ((addr >> 48) != 0) | |
1415 | p += emit_movk (p, rd, (addr >> 48) & 0xffff, 3); | |
1416 | ||
1417 | return p - buf; | |
1418 | } | |
1419 | ||
afbe19f8 PL |
1420 | /* Write a SUBS instruction into *BUF. |
1421 | ||
1422 | SUBS rd, rn, rm | |
1423 | ||
1424 | This instruction update the condition flags. | |
1425 | ||
1426 | RD is the destination register. | |
1427 | RN and RM are the source registers. */ | |
1428 | ||
1429 | static int | |
1430 | emit_subs (uint32_t *buf, struct aarch64_register rd, | |
1431 | struct aarch64_register rn, struct aarch64_operand operand) | |
1432 | { | |
1433 | return emit_data_processing (buf, SUBS, rd, rn, operand); | |
1434 | } | |
1435 | ||
1436 | /* Write a CMP instruction into *BUF. | |
1437 | ||
1438 | CMP rn, rm | |
1439 | ||
1440 | This instruction is an alias of SUBS xzr, rn, rm. | |
1441 | ||
1442 | RN and RM are the registers to compare. */ | |
1443 | ||
1444 | static int | |
1445 | emit_cmp (uint32_t *buf, struct aarch64_register rn, | |
1446 | struct aarch64_operand operand) | |
1447 | { | |
1448 | return emit_subs (buf, xzr, rn, operand); | |
1449 | } | |
1450 | ||
1451 | /* Write a AND instruction into *BUF. | |
1452 | ||
1453 | AND rd, rn, rm | |
1454 | ||
1455 | RD is the destination register. | |
1456 | RN and RM are the source registers. */ | |
1457 | ||
1458 | static int | |
1459 | emit_and (uint32_t *buf, struct aarch64_register rd, | |
1460 | struct aarch64_register rn, struct aarch64_register rm) | |
1461 | { | |
1462 | return emit_data_processing_reg (buf, AND, rd, rn, rm); | |
1463 | } | |
1464 | ||
1465 | /* Write a ORR instruction into *BUF. | |
1466 | ||
1467 | ORR rd, rn, rm | |
1468 | ||
1469 | RD is the destination register. | |
1470 | RN and RM are the source registers. */ | |
1471 | ||
1472 | static int | |
1473 | emit_orr (uint32_t *buf, struct aarch64_register rd, | |
1474 | struct aarch64_register rn, struct aarch64_register rm) | |
1475 | { | |
1476 | return emit_data_processing_reg (buf, ORR, rd, rn, rm); | |
1477 | } | |
1478 | ||
1479 | /* Write a ORN instruction into *BUF. | |
1480 | ||
1481 | ORN rd, rn, rm | |
1482 | ||
1483 | RD is the destination register. | |
1484 | RN and RM are the source registers. */ | |
1485 | ||
1486 | static int | |
1487 | emit_orn (uint32_t *buf, struct aarch64_register rd, | |
1488 | struct aarch64_register rn, struct aarch64_register rm) | |
1489 | { | |
1490 | return emit_data_processing_reg (buf, ORN, rd, rn, rm); | |
1491 | } | |
1492 | ||
1493 | /* Write a EOR instruction into *BUF. | |
1494 | ||
1495 | EOR rd, rn, rm | |
1496 | ||
1497 | RD is the destination register. | |
1498 | RN and RM are the source registers. */ | |
1499 | ||
1500 | static int | |
1501 | emit_eor (uint32_t *buf, struct aarch64_register rd, | |
1502 | struct aarch64_register rn, struct aarch64_register rm) | |
1503 | { | |
1504 | return emit_data_processing_reg (buf, EOR, rd, rn, rm); | |
1505 | } | |
1506 | ||
1507 | /* Write a MVN instruction into *BUF. | |
1508 | ||
1509 | MVN rd, rm | |
1510 | ||
1511 | This is an alias for ORN rd, xzr, rm. | |
1512 | ||
1513 | RD is the destination register. | |
1514 | RM is the source register. */ | |
1515 | ||
1516 | static int | |
1517 | emit_mvn (uint32_t *buf, struct aarch64_register rd, | |
1518 | struct aarch64_register rm) | |
1519 | { | |
1520 | return emit_orn (buf, rd, xzr, rm); | |
1521 | } | |
1522 | ||
1523 | /* Write a LSLV instruction into *BUF. | |
1524 | ||
1525 | LSLV rd, rn, rm | |
1526 | ||
1527 | RD is the destination register. | |
1528 | RN and RM are the source registers. */ | |
1529 | ||
1530 | static int | |
1531 | emit_lslv (uint32_t *buf, struct aarch64_register rd, | |
1532 | struct aarch64_register rn, struct aarch64_register rm) | |
1533 | { | |
1534 | return emit_data_processing_reg (buf, LSLV, rd, rn, rm); | |
1535 | } | |
1536 | ||
1537 | /* Write a LSRV instruction into *BUF. | |
1538 | ||
1539 | LSRV rd, rn, rm | |
1540 | ||
1541 | RD is the destination register. | |
1542 | RN and RM are the source registers. */ | |
1543 | ||
1544 | static int | |
1545 | emit_lsrv (uint32_t *buf, struct aarch64_register rd, | |
1546 | struct aarch64_register rn, struct aarch64_register rm) | |
1547 | { | |
1548 | return emit_data_processing_reg (buf, LSRV, rd, rn, rm); | |
1549 | } | |
1550 | ||
1551 | /* Write a ASRV instruction into *BUF. | |
1552 | ||
1553 | ASRV rd, rn, rm | |
1554 | ||
1555 | RD is the destination register. | |
1556 | RN and RM are the source registers. */ | |
1557 | ||
1558 | static int | |
1559 | emit_asrv (uint32_t *buf, struct aarch64_register rd, | |
1560 | struct aarch64_register rn, struct aarch64_register rm) | |
1561 | { | |
1562 | return emit_data_processing_reg (buf, ASRV, rd, rn, rm); | |
1563 | } | |
1564 | ||
1565 | /* Write a MUL instruction into *BUF. | |
1566 | ||
1567 | MUL rd, rn, rm | |
1568 | ||
1569 | RD is the destination register. | |
1570 | RN and RM are the source registers. */ | |
1571 | ||
1572 | static int | |
1573 | emit_mul (uint32_t *buf, struct aarch64_register rd, | |
1574 | struct aarch64_register rn, struct aarch64_register rm) | |
1575 | { | |
1576 | return emit_data_processing_reg (buf, MUL, rd, rn, rm); | |
1577 | } | |
1578 | ||
bb903df0 PL |
1579 | /* Write a MRS instruction into *BUF. The register size is 64-bit. |
1580 | ||
1581 | MRS xt, system_reg | |
1582 | ||
1583 | RT is the destination register. | |
1584 | SYSTEM_REG is special purpose register to read. */ | |
1585 | ||
1586 | static int | |
1587 | emit_mrs (uint32_t *buf, struct aarch64_register rt, | |
1588 | enum aarch64_system_control_registers system_reg) | |
1589 | { | |
e1c587c3 YQ |
1590 | return aarch64_emit_insn (buf, MRS | ENCODE (system_reg, 15, 5) |
1591 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1592 | } |
1593 | ||
1594 | /* Write a MSR instruction into *BUF. The register size is 64-bit. | |
1595 | ||
1596 | MSR system_reg, xt | |
1597 | ||
1598 | SYSTEM_REG is special purpose register to write. | |
1599 | RT is the input register. */ | |
1600 | ||
1601 | static int | |
1602 | emit_msr (uint32_t *buf, enum aarch64_system_control_registers system_reg, | |
1603 | struct aarch64_register rt) | |
1604 | { | |
e1c587c3 YQ |
1605 | return aarch64_emit_insn (buf, MSR | ENCODE (system_reg, 15, 5) |
1606 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1607 | } |
1608 | ||
1609 | /* Write a SEVL instruction into *BUF. | |
1610 | ||
1611 | This is a hint instruction telling the hardware to trigger an event. */ | |
1612 | ||
1613 | static int | |
1614 | emit_sevl (uint32_t *buf) | |
1615 | { | |
e1c587c3 | 1616 | return aarch64_emit_insn (buf, SEVL); |
bb903df0 PL |
1617 | } |
1618 | ||
1619 | /* Write a WFE instruction into *BUF. | |
1620 | ||
1621 | This is a hint instruction telling the hardware to wait for an event. */ | |
1622 | ||
1623 | static int | |
1624 | emit_wfe (uint32_t *buf) | |
1625 | { | |
e1c587c3 | 1626 | return aarch64_emit_insn (buf, WFE); |
bb903df0 PL |
1627 | } |
1628 | ||
afbe19f8 PL |
1629 | /* Write a SBFM instruction into *BUF. |
1630 | ||
1631 | SBFM rd, rn, #immr, #imms | |
1632 | ||
1633 | This instruction moves the bits from #immr to #imms into the | |
1634 | destination, sign extending the result. | |
1635 | ||
1636 | RD is the destination register. | |
1637 | RN is the source register. | |
1638 | IMMR is the bit number to start at (least significant bit). | |
1639 | IMMS is the bit number to stop at (most significant bit). */ | |
1640 | ||
1641 | static int | |
1642 | emit_sbfm (uint32_t *buf, struct aarch64_register rd, | |
1643 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1644 | { | |
1645 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1646 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1647 | ||
e1c587c3 YQ |
1648 | return aarch64_emit_insn (buf, SBFM | size | n | ENCODE (immr, 6, 16) |
1649 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1650 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1651 | } |
1652 | ||
1653 | /* Write a SBFX instruction into *BUF. | |
1654 | ||
1655 | SBFX rd, rn, #lsb, #width | |
1656 | ||
1657 | This instruction moves #width bits from #lsb into the destination, sign | |
1658 | extending the result. This is an alias for: | |
1659 | ||
1660 | SBFM rd, rn, #lsb, #(lsb + width - 1) | |
1661 | ||
1662 | RD is the destination register. | |
1663 | RN is the source register. | |
1664 | LSB is the bit number to start at (least significant bit). | |
1665 | WIDTH is the number of bits to move. */ | |
1666 | ||
1667 | static int | |
1668 | emit_sbfx (uint32_t *buf, struct aarch64_register rd, | |
1669 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1670 | { | |
1671 | return emit_sbfm (buf, rd, rn, lsb, lsb + width - 1); | |
1672 | } | |
1673 | ||
1674 | /* Write a UBFM instruction into *BUF. | |
1675 | ||
1676 | UBFM rd, rn, #immr, #imms | |
1677 | ||
1678 | This instruction moves the bits from #immr to #imms into the | |
1679 | destination, extending the result with zeros. | |
1680 | ||
1681 | RD is the destination register. | |
1682 | RN is the source register. | |
1683 | IMMR is the bit number to start at (least significant bit). | |
1684 | IMMS is the bit number to stop at (most significant bit). */ | |
1685 | ||
1686 | static int | |
1687 | emit_ubfm (uint32_t *buf, struct aarch64_register rd, | |
1688 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1689 | { | |
1690 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1691 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1692 | ||
e1c587c3 YQ |
1693 | return aarch64_emit_insn (buf, UBFM | size | n | ENCODE (immr, 6, 16) |
1694 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1695 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1696 | } |
1697 | ||
1698 | /* Write a UBFX instruction into *BUF. | |
1699 | ||
1700 | UBFX rd, rn, #lsb, #width | |
1701 | ||
1702 | This instruction moves #width bits from #lsb into the destination, | |
1703 | extending the result with zeros. This is an alias for: | |
1704 | ||
1705 | UBFM rd, rn, #lsb, #(lsb + width - 1) | |
1706 | ||
1707 | RD is the destination register. | |
1708 | RN is the source register. | |
1709 | LSB is the bit number to start at (least significant bit). | |
1710 | WIDTH is the number of bits to move. */ | |
1711 | ||
1712 | static int | |
1713 | emit_ubfx (uint32_t *buf, struct aarch64_register rd, | |
1714 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1715 | { | |
1716 | return emit_ubfm (buf, rd, rn, lsb, lsb + width - 1); | |
1717 | } | |
1718 | ||
1719 | /* Write a CSINC instruction into *BUF. | |
1720 | ||
1721 | CSINC rd, rn, rm, cond | |
1722 | ||
1723 | This instruction conditionally increments rn or rm and places the result | |
1724 | in rd. rn is chosen is the condition is true. | |
1725 | ||
1726 | RD is the destination register. | |
1727 | RN and RM are the source registers. | |
1728 | COND is the encoded condition. */ | |
1729 | ||
1730 | static int | |
1731 | emit_csinc (uint32_t *buf, struct aarch64_register rd, | |
1732 | struct aarch64_register rn, struct aarch64_register rm, | |
1733 | unsigned cond) | |
1734 | { | |
1735 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1736 | ||
e1c587c3 YQ |
1737 | return aarch64_emit_insn (buf, CSINC | size | ENCODE (rm.num, 5, 16) |
1738 | | ENCODE (cond, 4, 12) | ENCODE (rn.num, 5, 5) | |
1739 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1740 | } |
1741 | ||
1742 | /* Write a CSET instruction into *BUF. | |
1743 | ||
1744 | CSET rd, cond | |
1745 | ||
1746 | This instruction conditionally write 1 or 0 in the destination register. | |
1747 | 1 is written if the condition is true. This is an alias for: | |
1748 | ||
1749 | CSINC rd, xzr, xzr, !cond | |
1750 | ||
1751 | Note that the condition needs to be inverted. | |
1752 | ||
1753 | RD is the destination register. | |
1754 | RN and RM are the source registers. | |
1755 | COND is the encoded condition. */ | |
1756 | ||
1757 | static int | |
1758 | emit_cset (uint32_t *buf, struct aarch64_register rd, unsigned cond) | |
1759 | { | |
1760 | /* The least significant bit of the condition needs toggling in order to | |
1761 | invert it. */ | |
1762 | return emit_csinc (buf, rd, xzr, xzr, cond ^ 0x1); | |
1763 | } | |
1764 | ||
bb903df0 PL |
1765 | /* Write LEN instructions from BUF into the inferior memory at *TO. |
1766 | ||
1767 | Note instructions are always little endian on AArch64, unlike data. */ | |
1768 | ||
1769 | static void | |
1770 | append_insns (CORE_ADDR *to, size_t len, const uint32_t *buf) | |
1771 | { | |
1772 | size_t byte_len = len * sizeof (uint32_t); | |
1773 | #if (__BYTE_ORDER == __BIG_ENDIAN) | |
cb93dc7f | 1774 | uint32_t *le_buf = (uint32_t *) xmalloc (byte_len); |
bb903df0 PL |
1775 | size_t i; |
1776 | ||
1777 | for (i = 0; i < len; i++) | |
1778 | le_buf[i] = htole32 (buf[i]); | |
1779 | ||
4196ab2a | 1780 | target_write_memory (*to, (const unsigned char *) le_buf, byte_len); |
bb903df0 PL |
1781 | |
1782 | xfree (le_buf); | |
1783 | #else | |
4196ab2a | 1784 | target_write_memory (*to, (const unsigned char *) buf, byte_len); |
bb903df0 PL |
1785 | #endif |
1786 | ||
1787 | *to += byte_len; | |
1788 | } | |
1789 | ||
0badd99f YQ |
1790 | /* Sub-class of struct aarch64_insn_data, store information of |
1791 | instruction relocation for fast tracepoint. Visitor can | |
1792 | relocate an instruction from BASE.INSN_ADDR to NEW_ADDR and save | |
1793 | the relocated instructions in buffer pointed by INSN_PTR. */ | |
bb903df0 | 1794 | |
0badd99f YQ |
1795 | struct aarch64_insn_relocation_data |
1796 | { | |
1797 | struct aarch64_insn_data base; | |
1798 | ||
1799 | /* The new address the instruction is relocated to. */ | |
1800 | CORE_ADDR new_addr; | |
1801 | /* Pointer to the buffer of relocated instruction(s). */ | |
1802 | uint32_t *insn_ptr; | |
1803 | }; | |
1804 | ||
1805 | /* Implementation of aarch64_insn_visitor method "b". */ | |
1806 | ||
1807 | static void | |
1808 | aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset, | |
1809 | struct aarch64_insn_data *data) | |
1810 | { | |
1811 | struct aarch64_insn_relocation_data *insn_reloc | |
1812 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1813 | int64_t new_offset |
0badd99f YQ |
1814 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1815 | ||
1816 | if (can_encode_int32 (new_offset, 28)) | |
1817 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, is_bl, new_offset); | |
1818 | } | |
1819 | ||
1820 | /* Implementation of aarch64_insn_visitor method "b_cond". */ | |
1821 | ||
1822 | static void | |
1823 | aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset, | |
1824 | struct aarch64_insn_data *data) | |
1825 | { | |
1826 | struct aarch64_insn_relocation_data *insn_reloc | |
1827 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1828 | int64_t new_offset |
0badd99f YQ |
1829 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1830 | ||
1831 | if (can_encode_int32 (new_offset, 21)) | |
1832 | { | |
1833 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, | |
1834 | new_offset); | |
bb903df0 | 1835 | } |
0badd99f | 1836 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1837 | { |
0badd99f YQ |
1838 | /* The offset is out of range for a conditional branch |
1839 | instruction but not for a unconditional branch. We can use | |
1840 | the following instructions instead: | |
bb903df0 | 1841 | |
0badd99f YQ |
1842 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
1843 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1844 | TAKEN: | |
1845 | B #(offset - 8) | |
1846 | NOT_TAKEN: | |
1847 | ||
1848 | */ | |
1849 | ||
1850 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, 8); | |
1851 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1852 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
bb903df0 | 1853 | } |
0badd99f | 1854 | } |
bb903df0 | 1855 | |
0badd99f YQ |
1856 | /* Implementation of aarch64_insn_visitor method "cb". */ |
1857 | ||
1858 | static void | |
1859 | aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz, | |
1860 | const unsigned rn, int is64, | |
1861 | struct aarch64_insn_data *data) | |
1862 | { | |
1863 | struct aarch64_insn_relocation_data *insn_reloc | |
1864 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1865 | int64_t new_offset |
0badd99f YQ |
1866 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1867 | ||
1868 | if (can_encode_int32 (new_offset, 21)) | |
1869 | { | |
1870 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1871 | aarch64_register (rn, is64), new_offset); | |
bb903df0 | 1872 | } |
0badd99f | 1873 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1874 | { |
0badd99f YQ |
1875 | /* The offset is out of range for a compare and branch |
1876 | instruction but not for a unconditional branch. We can use | |
1877 | the following instructions instead: | |
1878 | ||
1879 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. | |
1880 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1881 | TAKEN: | |
1882 | B #(offset - 8) | |
1883 | NOT_TAKEN: | |
1884 | ||
1885 | */ | |
1886 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1887 | aarch64_register (rn, is64), 8); | |
1888 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1889 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
1890 | } | |
1891 | } | |
bb903df0 | 1892 | |
0badd99f | 1893 | /* Implementation of aarch64_insn_visitor method "tb". */ |
bb903df0 | 1894 | |
0badd99f YQ |
1895 | static void |
1896 | aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz, | |
1897 | const unsigned rt, unsigned bit, | |
1898 | struct aarch64_insn_data *data) | |
1899 | { | |
1900 | struct aarch64_insn_relocation_data *insn_reloc | |
1901 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1902 | int64_t new_offset |
0badd99f YQ |
1903 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1904 | ||
1905 | if (can_encode_int32 (new_offset, 16)) | |
1906 | { | |
1907 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1908 | aarch64_register (rt, 1), new_offset); | |
bb903df0 | 1909 | } |
0badd99f | 1910 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1911 | { |
0badd99f YQ |
1912 | /* The offset is out of range for a test bit and branch |
1913 | instruction but not for a unconditional branch. We can use | |
1914 | the following instructions instead: | |
1915 | ||
1916 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. | |
1917 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1918 | TAKEN: | |
1919 | B #(offset - 8) | |
1920 | NOT_TAKEN: | |
1921 | ||
1922 | */ | |
1923 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1924 | aarch64_register (rt, 1), 8); | |
1925 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1926 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, | |
1927 | new_offset - 8); | |
1928 | } | |
1929 | } | |
bb903df0 | 1930 | |
0badd99f | 1931 | /* Implementation of aarch64_insn_visitor method "adr". */ |
bb903df0 | 1932 | |
0badd99f YQ |
1933 | static void |
1934 | aarch64_ftrace_insn_reloc_adr (const int32_t offset, const unsigned rd, | |
1935 | const int is_adrp, | |
1936 | struct aarch64_insn_data *data) | |
1937 | { | |
1938 | struct aarch64_insn_relocation_data *insn_reloc | |
1939 | = (struct aarch64_insn_relocation_data *) data; | |
1940 | /* We know exactly the address the ADR{P,} instruction will compute. | |
1941 | We can just write it to the destination register. */ | |
1942 | CORE_ADDR address = data->insn_addr + offset; | |
bb903df0 | 1943 | |
0badd99f YQ |
1944 | if (is_adrp) |
1945 | { | |
1946 | /* Clear the lower 12 bits of the offset to get the 4K page. */ | |
1947 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1948 | aarch64_register (rd, 1), | |
1949 | address & ~0xfff); | |
1950 | } | |
1951 | else | |
1952 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1953 | aarch64_register (rd, 1), address); | |
1954 | } | |
bb903df0 | 1955 | |
0badd99f | 1956 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
bb903df0 | 1957 | |
0badd99f YQ |
1958 | static void |
1959 | aarch64_ftrace_insn_reloc_ldr_literal (const int32_t offset, const int is_sw, | |
1960 | const unsigned rt, const int is64, | |
1961 | struct aarch64_insn_data *data) | |
1962 | { | |
1963 | struct aarch64_insn_relocation_data *insn_reloc | |
1964 | = (struct aarch64_insn_relocation_data *) data; | |
1965 | CORE_ADDR address = data->insn_addr + offset; | |
1966 | ||
1967 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1968 | aarch64_register (rt, 1), address); | |
1969 | ||
1970 | /* We know exactly what address to load from, and what register we | |
1971 | can use: | |
1972 | ||
1973 | MOV xd, #(oldloc + offset) | |
1974 | MOVK xd, #((oldloc + offset) >> 16), lsl #16 | |
1975 | ... | |
1976 | ||
1977 | LDR xd, [xd] ; or LDRSW xd, [xd] | |
1978 | ||
1979 | */ | |
1980 | ||
1981 | if (is_sw) | |
1982 | insn_reloc->insn_ptr += emit_ldrsw (insn_reloc->insn_ptr, | |
1983 | aarch64_register (rt, 1), | |
1984 | aarch64_register (rt, 1), | |
1985 | offset_memory_operand (0)); | |
bb903df0 | 1986 | else |
0badd99f YQ |
1987 | insn_reloc->insn_ptr += emit_ldr (insn_reloc->insn_ptr, |
1988 | aarch64_register (rt, is64), | |
1989 | aarch64_register (rt, 1), | |
1990 | offset_memory_operand (0)); | |
1991 | } | |
1992 | ||
1993 | /* Implementation of aarch64_insn_visitor method "others". */ | |
1994 | ||
1995 | static void | |
1996 | aarch64_ftrace_insn_reloc_others (const uint32_t insn, | |
1997 | struct aarch64_insn_data *data) | |
1998 | { | |
1999 | struct aarch64_insn_relocation_data *insn_reloc | |
2000 | = (struct aarch64_insn_relocation_data *) data; | |
bb903df0 | 2001 | |
0badd99f YQ |
2002 | /* The instruction is not PC relative. Just re-emit it at the new |
2003 | location. */ | |
e1c587c3 | 2004 | insn_reloc->insn_ptr += aarch64_emit_insn (insn_reloc->insn_ptr, insn); |
0badd99f YQ |
2005 | } |
2006 | ||
2007 | static const struct aarch64_insn_visitor visitor = | |
2008 | { | |
2009 | aarch64_ftrace_insn_reloc_b, | |
2010 | aarch64_ftrace_insn_reloc_b_cond, | |
2011 | aarch64_ftrace_insn_reloc_cb, | |
2012 | aarch64_ftrace_insn_reloc_tb, | |
2013 | aarch64_ftrace_insn_reloc_adr, | |
2014 | aarch64_ftrace_insn_reloc_ldr_literal, | |
2015 | aarch64_ftrace_insn_reloc_others, | |
2016 | }; | |
2017 | ||
809a0c35 TBA |
2018 | bool |
2019 | aarch64_target::supports_fast_tracepoints () | |
2020 | { | |
2021 | return true; | |
2022 | } | |
2023 | ||
2024 | /* Implementation of target ops method | |
bb903df0 PL |
2025 | "install_fast_tracepoint_jump_pad". */ |
2026 | ||
809a0c35 TBA |
2027 | int |
2028 | aarch64_target::install_fast_tracepoint_jump_pad | |
2029 | (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector, | |
2030 | CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry, | |
2031 | CORE_ADDR *trampoline, ULONGEST *trampoline_size, | |
2032 | unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size, | |
2033 | CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end, | |
2034 | char *err) | |
bb903df0 PL |
2035 | { |
2036 | uint32_t buf[256]; | |
2037 | uint32_t *p = buf; | |
2ac09a5b | 2038 | int64_t offset; |
bb903df0 | 2039 | int i; |
70b439f0 | 2040 | uint32_t insn; |
bb903df0 | 2041 | CORE_ADDR buildaddr = *jump_entry; |
0badd99f | 2042 | struct aarch64_insn_relocation_data insn_data; |
bb903df0 PL |
2043 | |
2044 | /* We need to save the current state on the stack both to restore it | |
2045 | later and to collect register values when the tracepoint is hit. | |
2046 | ||
2047 | The saved registers are pushed in a layout that needs to be in sync | |
2048 | with aarch64_ft_collect_regmap (see linux-aarch64-ipa.c). Later on | |
2049 | the supply_fast_tracepoint_registers function will fill in the | |
2050 | register cache from a pointer to saved registers on the stack we build | |
2051 | here. | |
2052 | ||
2053 | For simplicity, we set the size of each cell on the stack to 16 bytes. | |
2054 | This way one cell can hold any register type, from system registers | |
2055 | to the 128 bit SIMD&FP registers. Furthermore, the stack pointer | |
2056 | has to be 16 bytes aligned anyway. | |
2057 | ||
2058 | Note that the CPSR register does not exist on AArch64. Instead we | |
2059 | can access system bits describing the process state with the | |
2060 | MRS/MSR instructions, namely the condition flags. We save them as | |
2061 | if they are part of a CPSR register because that's how GDB | |
2062 | interprets these system bits. At the moment, only the condition | |
2063 | flags are saved in CPSR (NZCV). | |
2064 | ||
2065 | Stack layout, each cell is 16 bytes (descending): | |
2066 | ||
2067 | High *-------- SIMD&FP registers from 31 down to 0. --------* | |
2068 | | q31 | | |
2069 | . . | |
2070 | . . 32 cells | |
2071 | . . | |
2072 | | q0 | | |
2073 | *---- General purpose registers from 30 down to 0. ----* | |
2074 | | x30 | | |
2075 | . . | |
2076 | . . 31 cells | |
2077 | . . | |
2078 | | x0 | | |
2079 | *------------- Special purpose registers. -------------* | |
2080 | | SP | | |
2081 | | PC | | |
2082 | | CPSR (NZCV) | 5 cells | |
2083 | | FPSR | | |
2084 | | FPCR | <- SP + 16 | |
2085 | *------------- collecting_t object --------------------* | |
2086 | | TPIDR_EL0 | struct tracepoint * | | |
2087 | Low *------------------------------------------------------* | |
2088 | ||
2089 | After this stack is set up, we issue a call to the collector, passing | |
2090 | it the saved registers at (SP + 16). */ | |
2091 | ||
2092 | /* Push SIMD&FP registers on the stack: | |
2093 | ||
2094 | SUB sp, sp, #(32 * 16) | |
2095 | ||
2096 | STP q30, q31, [sp, #(30 * 16)] | |
2097 | ... | |
2098 | STP q0, q1, [sp] | |
2099 | ||
2100 | */ | |
2101 | p += emit_sub (p, sp, sp, immediate_operand (32 * 16)); | |
2102 | for (i = 30; i >= 0; i -= 2) | |
2103 | p += emit_stp_q_offset (p, i, i + 1, sp, i * 16); | |
2104 | ||
30baf67b | 2105 | /* Push general purpose registers on the stack. Note that we do not need |
bb903df0 PL |
2106 | to push x31 as it represents the xzr register and not the stack |
2107 | pointer in a STR instruction. | |
2108 | ||
2109 | SUB sp, sp, #(31 * 16) | |
2110 | ||
2111 | STR x30, [sp, #(30 * 16)] | |
2112 | ... | |
2113 | STR x0, [sp] | |
2114 | ||
2115 | */ | |
2116 | p += emit_sub (p, sp, sp, immediate_operand (31 * 16)); | |
2117 | for (i = 30; i >= 0; i -= 1) | |
2118 | p += emit_str (p, aarch64_register (i, 1), sp, | |
2119 | offset_memory_operand (i * 16)); | |
2120 | ||
2121 | /* Make space for 5 more cells. | |
2122 | ||
2123 | SUB sp, sp, #(5 * 16) | |
2124 | ||
2125 | */ | |
2126 | p += emit_sub (p, sp, sp, immediate_operand (5 * 16)); | |
2127 | ||
2128 | ||
2129 | /* Save SP: | |
2130 | ||
2131 | ADD x4, sp, #((32 + 31 + 5) * 16) | |
2132 | STR x4, [sp, #(4 * 16)] | |
2133 | ||
2134 | */ | |
2135 | p += emit_add (p, x4, sp, immediate_operand ((32 + 31 + 5) * 16)); | |
2136 | p += emit_str (p, x4, sp, offset_memory_operand (4 * 16)); | |
2137 | ||
2138 | /* Save PC (tracepoint address): | |
2139 | ||
2140 | MOV x3, #(tpaddr) | |
2141 | ... | |
2142 | ||
2143 | STR x3, [sp, #(3 * 16)] | |
2144 | ||
2145 | */ | |
2146 | ||
2147 | p += emit_mov_addr (p, x3, tpaddr); | |
2148 | p += emit_str (p, x3, sp, offset_memory_operand (3 * 16)); | |
2149 | ||
2150 | /* Save CPSR (NZCV), FPSR and FPCR: | |
2151 | ||
2152 | MRS x2, nzcv | |
2153 | MRS x1, fpsr | |
2154 | MRS x0, fpcr | |
2155 | ||
2156 | STR x2, [sp, #(2 * 16)] | |
2157 | STR x1, [sp, #(1 * 16)] | |
2158 | STR x0, [sp, #(0 * 16)] | |
2159 | ||
2160 | */ | |
2161 | p += emit_mrs (p, x2, NZCV); | |
2162 | p += emit_mrs (p, x1, FPSR); | |
2163 | p += emit_mrs (p, x0, FPCR); | |
2164 | p += emit_str (p, x2, sp, offset_memory_operand (2 * 16)); | |
2165 | p += emit_str (p, x1, sp, offset_memory_operand (1 * 16)); | |
2166 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2167 | ||
2168 | /* Push the collecting_t object. It consist of the address of the | |
2169 | tracepoint and an ID for the current thread. We get the latter by | |
2170 | reading the tpidr_el0 system register. It corresponds to the | |
2171 | NT_ARM_TLS register accessible with ptrace. | |
2172 | ||
2173 | MOV x0, #(tpoint) | |
2174 | ... | |
2175 | ||
2176 | MRS x1, tpidr_el0 | |
2177 | ||
2178 | STP x0, x1, [sp, #-16]! | |
2179 | ||
2180 | */ | |
2181 | ||
2182 | p += emit_mov_addr (p, x0, tpoint); | |
2183 | p += emit_mrs (p, x1, TPIDR_EL0); | |
2184 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-16)); | |
2185 | ||
2186 | /* Spin-lock: | |
2187 | ||
2188 | The shared memory for the lock is at lockaddr. It will hold zero | |
2189 | if no-one is holding the lock, otherwise it contains the address of | |
2190 | the collecting_t object on the stack of the thread which acquired it. | |
2191 | ||
2192 | At this stage, the stack pointer points to this thread's collecting_t | |
2193 | object. | |
2194 | ||
2195 | We use the following registers: | |
2196 | - x0: Address of the lock. | |
2197 | - x1: Pointer to collecting_t object. | |
2198 | - x2: Scratch register. | |
2199 | ||
2200 | MOV x0, #(lockaddr) | |
2201 | ... | |
2202 | MOV x1, sp | |
2203 | ||
2204 | ; Trigger an event local to this core. So the following WFE | |
2205 | ; instruction is ignored. | |
2206 | SEVL | |
2207 | again: | |
2208 | ; Wait for an event. The event is triggered by either the SEVL | |
2209 | ; or STLR instructions (store release). | |
2210 | WFE | |
2211 | ||
2212 | ; Atomically read at lockaddr. This marks the memory location as | |
2213 | ; exclusive. This instruction also has memory constraints which | |
2214 | ; make sure all previous data reads and writes are done before | |
2215 | ; executing it. | |
2216 | LDAXR x2, [x0] | |
2217 | ||
2218 | ; Try again if another thread holds the lock. | |
2219 | CBNZ x2, again | |
2220 | ||
2221 | ; We can lock it! Write the address of the collecting_t object. | |
2222 | ; This instruction will fail if the memory location is not marked | |
2223 | ; as exclusive anymore. If it succeeds, it will remove the | |
2224 | ; exclusive mark on the memory location. This way, if another | |
2225 | ; thread executes this instruction before us, we will fail and try | |
2226 | ; all over again. | |
2227 | STXR w2, x1, [x0] | |
2228 | CBNZ w2, again | |
2229 | ||
2230 | */ | |
2231 | ||
2232 | p += emit_mov_addr (p, x0, lockaddr); | |
2233 | p += emit_mov (p, x1, register_operand (sp)); | |
2234 | ||
2235 | p += emit_sevl (p); | |
2236 | p += emit_wfe (p); | |
2237 | p += emit_ldaxr (p, x2, x0); | |
2238 | p += emit_cb (p, 1, w2, -2 * 4); | |
2239 | p += emit_stxr (p, w2, x1, x0); | |
2240 | p += emit_cb (p, 1, x2, -4 * 4); | |
2241 | ||
2242 | /* Call collector (struct tracepoint *, unsigned char *): | |
2243 | ||
2244 | MOV x0, #(tpoint) | |
2245 | ... | |
2246 | ||
2247 | ; Saved registers start after the collecting_t object. | |
2248 | ADD x1, sp, #16 | |
2249 | ||
2250 | ; We use an intra-procedure-call scratch register. | |
2251 | MOV ip0, #(collector) | |
2252 | ... | |
2253 | ||
2254 | ; And call back to C! | |
2255 | BLR ip0 | |
2256 | ||
2257 | */ | |
2258 | ||
2259 | p += emit_mov_addr (p, x0, tpoint); | |
2260 | p += emit_add (p, x1, sp, immediate_operand (16)); | |
2261 | ||
2262 | p += emit_mov_addr (p, ip0, collector); | |
2263 | p += emit_blr (p, ip0); | |
2264 | ||
2265 | /* Release the lock. | |
2266 | ||
2267 | MOV x0, #(lockaddr) | |
2268 | ... | |
2269 | ||
2270 | ; This instruction is a normal store with memory ordering | |
2271 | ; constraints. Thanks to this we do not have to put a data | |
2272 | ; barrier instruction to make sure all data read and writes are done | |
30baf67b | 2273 | ; before this instruction is executed. Furthermore, this instruction |
bb903df0 PL |
2274 | ; will trigger an event, letting other threads know they can grab |
2275 | ; the lock. | |
2276 | STLR xzr, [x0] | |
2277 | ||
2278 | */ | |
2279 | p += emit_mov_addr (p, x0, lockaddr); | |
2280 | p += emit_stlr (p, xzr, x0); | |
2281 | ||
2282 | /* Free collecting_t object: | |
2283 | ||
2284 | ADD sp, sp, #16 | |
2285 | ||
2286 | */ | |
2287 | p += emit_add (p, sp, sp, immediate_operand (16)); | |
2288 | ||
2289 | /* Restore CPSR (NZCV), FPSR and FPCR. And free all special purpose | |
2290 | registers from the stack. | |
2291 | ||
2292 | LDR x2, [sp, #(2 * 16)] | |
2293 | LDR x1, [sp, #(1 * 16)] | |
2294 | LDR x0, [sp, #(0 * 16)] | |
2295 | ||
2296 | MSR NZCV, x2 | |
2297 | MSR FPSR, x1 | |
2298 | MSR FPCR, x0 | |
2299 | ||
2300 | ADD sp, sp #(5 * 16) | |
2301 | ||
2302 | */ | |
2303 | p += emit_ldr (p, x2, sp, offset_memory_operand (2 * 16)); | |
2304 | p += emit_ldr (p, x1, sp, offset_memory_operand (1 * 16)); | |
2305 | p += emit_ldr (p, x0, sp, offset_memory_operand (0 * 16)); | |
2306 | p += emit_msr (p, NZCV, x2); | |
2307 | p += emit_msr (p, FPSR, x1); | |
2308 | p += emit_msr (p, FPCR, x0); | |
2309 | ||
2310 | p += emit_add (p, sp, sp, immediate_operand (5 * 16)); | |
2311 | ||
2312 | /* Pop general purpose registers: | |
2313 | ||
2314 | LDR x0, [sp] | |
2315 | ... | |
2316 | LDR x30, [sp, #(30 * 16)] | |
2317 | ||
2318 | ADD sp, sp, #(31 * 16) | |
2319 | ||
2320 | */ | |
2321 | for (i = 0; i <= 30; i += 1) | |
2322 | p += emit_ldr (p, aarch64_register (i, 1), sp, | |
2323 | offset_memory_operand (i * 16)); | |
2324 | p += emit_add (p, sp, sp, immediate_operand (31 * 16)); | |
2325 | ||
2326 | /* Pop SIMD&FP registers: | |
2327 | ||
2328 | LDP q0, q1, [sp] | |
2329 | ... | |
2330 | LDP q30, q31, [sp, #(30 * 16)] | |
2331 | ||
2332 | ADD sp, sp, #(32 * 16) | |
2333 | ||
2334 | */ | |
2335 | for (i = 0; i <= 30; i += 2) | |
2336 | p += emit_ldp_q_offset (p, i, i + 1, sp, i * 16); | |
2337 | p += emit_add (p, sp, sp, immediate_operand (32 * 16)); | |
2338 | ||
2339 | /* Write the code into the inferior memory. */ | |
2340 | append_insns (&buildaddr, p - buf, buf); | |
2341 | ||
2342 | /* Now emit the relocated instruction. */ | |
2343 | *adjusted_insn_addr = buildaddr; | |
70b439f0 | 2344 | target_read_uint32 (tpaddr, &insn); |
0badd99f YQ |
2345 | |
2346 | insn_data.base.insn_addr = tpaddr; | |
2347 | insn_data.new_addr = buildaddr; | |
2348 | insn_data.insn_ptr = buf; | |
2349 | ||
2350 | aarch64_relocate_instruction (insn, &visitor, | |
2351 | (struct aarch64_insn_data *) &insn_data); | |
2352 | ||
bb903df0 | 2353 | /* We may not have been able to relocate the instruction. */ |
0badd99f | 2354 | if (insn_data.insn_ptr == buf) |
bb903df0 PL |
2355 | { |
2356 | sprintf (err, | |
2357 | "E.Could not relocate instruction from %s to %s.", | |
2358 | core_addr_to_string_nz (tpaddr), | |
2359 | core_addr_to_string_nz (buildaddr)); | |
2360 | return 1; | |
2361 | } | |
dfaffe9d | 2362 | else |
0badd99f | 2363 | append_insns (&buildaddr, insn_data.insn_ptr - buf, buf); |
dfaffe9d | 2364 | *adjusted_insn_addr_end = buildaddr; |
bb903df0 PL |
2365 | |
2366 | /* Go back to the start of the buffer. */ | |
2367 | p = buf; | |
2368 | ||
2369 | /* Emit a branch back from the jump pad. */ | |
2370 | offset = (tpaddr + orig_size - buildaddr); | |
2371 | if (!can_encode_int32 (offset, 28)) | |
2372 | { | |
2373 | sprintf (err, | |
2374 | "E.Jump back from jump pad too far from tracepoint " | |
2ac09a5b | 2375 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2376 | offset); |
2377 | return 1; | |
2378 | } | |
2379 | ||
2380 | p += emit_b (p, 0, offset); | |
2381 | append_insns (&buildaddr, p - buf, buf); | |
2382 | ||
2383 | /* Give the caller a branch instruction into the jump pad. */ | |
2384 | offset = (*jump_entry - tpaddr); | |
2385 | if (!can_encode_int32 (offset, 28)) | |
2386 | { | |
2387 | sprintf (err, | |
2388 | "E.Jump pad too far from tracepoint " | |
2ac09a5b | 2389 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2390 | offset); |
2391 | return 1; | |
2392 | } | |
2393 | ||
2394 | emit_b ((uint32_t *) jjump_pad_insn, 0, offset); | |
2395 | *jjump_pad_insn_size = 4; | |
2396 | ||
2397 | /* Return the end address of our pad. */ | |
2398 | *jump_entry = buildaddr; | |
2399 | ||
2400 | return 0; | |
2401 | } | |
2402 | ||
afbe19f8 PL |
2403 | /* Helper function writing LEN instructions from START into |
2404 | current_insn_ptr. */ | |
2405 | ||
2406 | static void | |
2407 | emit_ops_insns (const uint32_t *start, int len) | |
2408 | { | |
2409 | CORE_ADDR buildaddr = current_insn_ptr; | |
2410 | ||
2411 | if (debug_threads) | |
2412 | debug_printf ("Adding %d instrucions at %s\n", | |
2413 | len, paddress (buildaddr)); | |
2414 | ||
2415 | append_insns (&buildaddr, len, start); | |
2416 | current_insn_ptr = buildaddr; | |
2417 | } | |
2418 | ||
2419 | /* Pop a register from the stack. */ | |
2420 | ||
2421 | static int | |
2422 | emit_pop (uint32_t *buf, struct aarch64_register rt) | |
2423 | { | |
2424 | return emit_ldr (buf, rt, sp, postindex_memory_operand (1 * 16)); | |
2425 | } | |
2426 | ||
2427 | /* Push a register on the stack. */ | |
2428 | ||
2429 | static int | |
2430 | emit_push (uint32_t *buf, struct aarch64_register rt) | |
2431 | { | |
2432 | return emit_str (buf, rt, sp, preindex_memory_operand (-1 * 16)); | |
2433 | } | |
2434 | ||
2435 | /* Implementation of emit_ops method "emit_prologue". */ | |
2436 | ||
2437 | static void | |
2438 | aarch64_emit_prologue (void) | |
2439 | { | |
2440 | uint32_t buf[16]; | |
2441 | uint32_t *p = buf; | |
2442 | ||
2443 | /* This function emit a prologue for the following function prototype: | |
2444 | ||
2445 | enum eval_result_type f (unsigned char *regs, | |
2446 | ULONGEST *value); | |
2447 | ||
2448 | The first argument is a buffer of raw registers. The second | |
2449 | argument is the result of | |
2450 | evaluating the expression, which will be set to whatever is on top of | |
2451 | the stack at the end. | |
2452 | ||
2453 | The stack set up by the prologue is as such: | |
2454 | ||
2455 | High *------------------------------------------------------* | |
2456 | | LR | | |
2457 | | FP | <- FP | |
2458 | | x1 (ULONGEST *value) | | |
2459 | | x0 (unsigned char *regs) | | |
2460 | Low *------------------------------------------------------* | |
2461 | ||
2462 | As we are implementing a stack machine, each opcode can expand the | |
2463 | stack so we never know how far we are from the data saved by this | |
2464 | prologue. In order to be able refer to value and regs later, we save | |
2465 | the current stack pointer in the frame pointer. This way, it is not | |
2466 | clobbered when calling C functions. | |
2467 | ||
30baf67b | 2468 | Finally, throughout every operation, we are using register x0 as the |
afbe19f8 PL |
2469 | top of the stack, and x1 as a scratch register. */ |
2470 | ||
2471 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16)); | |
2472 | p += emit_str (p, lr, sp, offset_memory_operand (3 * 8)); | |
2473 | p += emit_str (p, fp, sp, offset_memory_operand (2 * 8)); | |
2474 | ||
2475 | p += emit_add (p, fp, sp, immediate_operand (2 * 8)); | |
2476 | ||
2477 | ||
2478 | emit_ops_insns (buf, p - buf); | |
2479 | } | |
2480 | ||
2481 | /* Implementation of emit_ops method "emit_epilogue". */ | |
2482 | ||
2483 | static void | |
2484 | aarch64_emit_epilogue (void) | |
2485 | { | |
2486 | uint32_t buf[16]; | |
2487 | uint32_t *p = buf; | |
2488 | ||
2489 | /* Store the result of the expression (x0) in *value. */ | |
2490 | p += emit_sub (p, x1, fp, immediate_operand (1 * 8)); | |
2491 | p += emit_ldr (p, x1, x1, offset_memory_operand (0)); | |
2492 | p += emit_str (p, x0, x1, offset_memory_operand (0)); | |
2493 | ||
2494 | /* Restore the previous state. */ | |
2495 | p += emit_add (p, sp, fp, immediate_operand (2 * 8)); | |
2496 | p += emit_ldp (p, fp, lr, fp, offset_memory_operand (0)); | |
2497 | ||
2498 | /* Return expr_eval_no_error. */ | |
2499 | p += emit_mov (p, x0, immediate_operand (expr_eval_no_error)); | |
2500 | p += emit_ret (p, lr); | |
2501 | ||
2502 | emit_ops_insns (buf, p - buf); | |
2503 | } | |
2504 | ||
2505 | /* Implementation of emit_ops method "emit_add". */ | |
2506 | ||
2507 | static void | |
2508 | aarch64_emit_add (void) | |
2509 | { | |
2510 | uint32_t buf[16]; | |
2511 | uint32_t *p = buf; | |
2512 | ||
2513 | p += emit_pop (p, x1); | |
45e3745e | 2514 | p += emit_add (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2515 | |
2516 | emit_ops_insns (buf, p - buf); | |
2517 | } | |
2518 | ||
2519 | /* Implementation of emit_ops method "emit_sub". */ | |
2520 | ||
2521 | static void | |
2522 | aarch64_emit_sub (void) | |
2523 | { | |
2524 | uint32_t buf[16]; | |
2525 | uint32_t *p = buf; | |
2526 | ||
2527 | p += emit_pop (p, x1); | |
45e3745e | 2528 | p += emit_sub (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2529 | |
2530 | emit_ops_insns (buf, p - buf); | |
2531 | } | |
2532 | ||
2533 | /* Implementation of emit_ops method "emit_mul". */ | |
2534 | ||
2535 | static void | |
2536 | aarch64_emit_mul (void) | |
2537 | { | |
2538 | uint32_t buf[16]; | |
2539 | uint32_t *p = buf; | |
2540 | ||
2541 | p += emit_pop (p, x1); | |
2542 | p += emit_mul (p, x0, x1, x0); | |
2543 | ||
2544 | emit_ops_insns (buf, p - buf); | |
2545 | } | |
2546 | ||
2547 | /* Implementation of emit_ops method "emit_lsh". */ | |
2548 | ||
2549 | static void | |
2550 | aarch64_emit_lsh (void) | |
2551 | { | |
2552 | uint32_t buf[16]; | |
2553 | uint32_t *p = buf; | |
2554 | ||
2555 | p += emit_pop (p, x1); | |
2556 | p += emit_lslv (p, x0, x1, x0); | |
2557 | ||
2558 | emit_ops_insns (buf, p - buf); | |
2559 | } | |
2560 | ||
2561 | /* Implementation of emit_ops method "emit_rsh_signed". */ | |
2562 | ||
2563 | static void | |
2564 | aarch64_emit_rsh_signed (void) | |
2565 | { | |
2566 | uint32_t buf[16]; | |
2567 | uint32_t *p = buf; | |
2568 | ||
2569 | p += emit_pop (p, x1); | |
2570 | p += emit_asrv (p, x0, x1, x0); | |
2571 | ||
2572 | emit_ops_insns (buf, p - buf); | |
2573 | } | |
2574 | ||
2575 | /* Implementation of emit_ops method "emit_rsh_unsigned". */ | |
2576 | ||
2577 | static void | |
2578 | aarch64_emit_rsh_unsigned (void) | |
2579 | { | |
2580 | uint32_t buf[16]; | |
2581 | uint32_t *p = buf; | |
2582 | ||
2583 | p += emit_pop (p, x1); | |
2584 | p += emit_lsrv (p, x0, x1, x0); | |
2585 | ||
2586 | emit_ops_insns (buf, p - buf); | |
2587 | } | |
2588 | ||
2589 | /* Implementation of emit_ops method "emit_ext". */ | |
2590 | ||
2591 | static void | |
2592 | aarch64_emit_ext (int arg) | |
2593 | { | |
2594 | uint32_t buf[16]; | |
2595 | uint32_t *p = buf; | |
2596 | ||
2597 | p += emit_sbfx (p, x0, x0, 0, arg); | |
2598 | ||
2599 | emit_ops_insns (buf, p - buf); | |
2600 | } | |
2601 | ||
2602 | /* Implementation of emit_ops method "emit_log_not". */ | |
2603 | ||
2604 | static void | |
2605 | aarch64_emit_log_not (void) | |
2606 | { | |
2607 | uint32_t buf[16]; | |
2608 | uint32_t *p = buf; | |
2609 | ||
2610 | /* If the top of the stack is 0, replace it with 1. Else replace it with | |
2611 | 0. */ | |
2612 | ||
2613 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2614 | p += emit_cset (p, x0, EQ); | |
2615 | ||
2616 | emit_ops_insns (buf, p - buf); | |
2617 | } | |
2618 | ||
2619 | /* Implementation of emit_ops method "emit_bit_and". */ | |
2620 | ||
2621 | static void | |
2622 | aarch64_emit_bit_and (void) | |
2623 | { | |
2624 | uint32_t buf[16]; | |
2625 | uint32_t *p = buf; | |
2626 | ||
2627 | p += emit_pop (p, x1); | |
2628 | p += emit_and (p, x0, x0, x1); | |
2629 | ||
2630 | emit_ops_insns (buf, p - buf); | |
2631 | } | |
2632 | ||
2633 | /* Implementation of emit_ops method "emit_bit_or". */ | |
2634 | ||
2635 | static void | |
2636 | aarch64_emit_bit_or (void) | |
2637 | { | |
2638 | uint32_t buf[16]; | |
2639 | uint32_t *p = buf; | |
2640 | ||
2641 | p += emit_pop (p, x1); | |
2642 | p += emit_orr (p, x0, x0, x1); | |
2643 | ||
2644 | emit_ops_insns (buf, p - buf); | |
2645 | } | |
2646 | ||
2647 | /* Implementation of emit_ops method "emit_bit_xor". */ | |
2648 | ||
2649 | static void | |
2650 | aarch64_emit_bit_xor (void) | |
2651 | { | |
2652 | uint32_t buf[16]; | |
2653 | uint32_t *p = buf; | |
2654 | ||
2655 | p += emit_pop (p, x1); | |
2656 | p += emit_eor (p, x0, x0, x1); | |
2657 | ||
2658 | emit_ops_insns (buf, p - buf); | |
2659 | } | |
2660 | ||
2661 | /* Implementation of emit_ops method "emit_bit_not". */ | |
2662 | ||
2663 | static void | |
2664 | aarch64_emit_bit_not (void) | |
2665 | { | |
2666 | uint32_t buf[16]; | |
2667 | uint32_t *p = buf; | |
2668 | ||
2669 | p += emit_mvn (p, x0, x0); | |
2670 | ||
2671 | emit_ops_insns (buf, p - buf); | |
2672 | } | |
2673 | ||
2674 | /* Implementation of emit_ops method "emit_equal". */ | |
2675 | ||
2676 | static void | |
2677 | aarch64_emit_equal (void) | |
2678 | { | |
2679 | uint32_t buf[16]; | |
2680 | uint32_t *p = buf; | |
2681 | ||
2682 | p += emit_pop (p, x1); | |
2683 | p += emit_cmp (p, x0, register_operand (x1)); | |
2684 | p += emit_cset (p, x0, EQ); | |
2685 | ||
2686 | emit_ops_insns (buf, p - buf); | |
2687 | } | |
2688 | ||
2689 | /* Implementation of emit_ops method "emit_less_signed". */ | |
2690 | ||
2691 | static void | |
2692 | aarch64_emit_less_signed (void) | |
2693 | { | |
2694 | uint32_t buf[16]; | |
2695 | uint32_t *p = buf; | |
2696 | ||
2697 | p += emit_pop (p, x1); | |
2698 | p += emit_cmp (p, x1, register_operand (x0)); | |
2699 | p += emit_cset (p, x0, LT); | |
2700 | ||
2701 | emit_ops_insns (buf, p - buf); | |
2702 | } | |
2703 | ||
2704 | /* Implementation of emit_ops method "emit_less_unsigned". */ | |
2705 | ||
2706 | static void | |
2707 | aarch64_emit_less_unsigned (void) | |
2708 | { | |
2709 | uint32_t buf[16]; | |
2710 | uint32_t *p = buf; | |
2711 | ||
2712 | p += emit_pop (p, x1); | |
2713 | p += emit_cmp (p, x1, register_operand (x0)); | |
2714 | p += emit_cset (p, x0, LO); | |
2715 | ||
2716 | emit_ops_insns (buf, p - buf); | |
2717 | } | |
2718 | ||
2719 | /* Implementation of emit_ops method "emit_ref". */ | |
2720 | ||
2721 | static void | |
2722 | aarch64_emit_ref (int size) | |
2723 | { | |
2724 | uint32_t buf[16]; | |
2725 | uint32_t *p = buf; | |
2726 | ||
2727 | switch (size) | |
2728 | { | |
2729 | case 1: | |
2730 | p += emit_ldrb (p, w0, x0, offset_memory_operand (0)); | |
2731 | break; | |
2732 | case 2: | |
2733 | p += emit_ldrh (p, w0, x0, offset_memory_operand (0)); | |
2734 | break; | |
2735 | case 4: | |
2736 | p += emit_ldr (p, w0, x0, offset_memory_operand (0)); | |
2737 | break; | |
2738 | case 8: | |
2739 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2740 | break; | |
2741 | default: | |
2742 | /* Unknown size, bail on compilation. */ | |
2743 | emit_error = 1; | |
2744 | break; | |
2745 | } | |
2746 | ||
2747 | emit_ops_insns (buf, p - buf); | |
2748 | } | |
2749 | ||
2750 | /* Implementation of emit_ops method "emit_if_goto". */ | |
2751 | ||
2752 | static void | |
2753 | aarch64_emit_if_goto (int *offset_p, int *size_p) | |
2754 | { | |
2755 | uint32_t buf[16]; | |
2756 | uint32_t *p = buf; | |
2757 | ||
2758 | /* The Z flag is set or cleared here. */ | |
2759 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2760 | /* This instruction must not change the Z flag. */ | |
2761 | p += emit_pop (p, x0); | |
2762 | /* Branch over the next instruction if x0 == 0. */ | |
2763 | p += emit_bcond (p, EQ, 8); | |
2764 | ||
2765 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2766 | if (offset_p) | |
2767 | *offset_p = (p - buf) * 4; | |
2768 | if (size_p) | |
2769 | *size_p = 4; | |
2770 | p += emit_nop (p); | |
2771 | ||
2772 | emit_ops_insns (buf, p - buf); | |
2773 | } | |
2774 | ||
2775 | /* Implementation of emit_ops method "emit_goto". */ | |
2776 | ||
2777 | static void | |
2778 | aarch64_emit_goto (int *offset_p, int *size_p) | |
2779 | { | |
2780 | uint32_t buf[16]; | |
2781 | uint32_t *p = buf; | |
2782 | ||
2783 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2784 | if (offset_p) | |
2785 | *offset_p = 0; | |
2786 | if (size_p) | |
2787 | *size_p = 4; | |
2788 | p += emit_nop (p); | |
2789 | ||
2790 | emit_ops_insns (buf, p - buf); | |
2791 | } | |
2792 | ||
2793 | /* Implementation of emit_ops method "write_goto_address". */ | |
2794 | ||
bb1183e2 | 2795 | static void |
afbe19f8 PL |
2796 | aarch64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) |
2797 | { | |
2798 | uint32_t insn; | |
2799 | ||
2800 | emit_b (&insn, 0, to - from); | |
2801 | append_insns (&from, 1, &insn); | |
2802 | } | |
2803 | ||
2804 | /* Implementation of emit_ops method "emit_const". */ | |
2805 | ||
2806 | static void | |
2807 | aarch64_emit_const (LONGEST num) | |
2808 | { | |
2809 | uint32_t buf[16]; | |
2810 | uint32_t *p = buf; | |
2811 | ||
2812 | p += emit_mov_addr (p, x0, num); | |
2813 | ||
2814 | emit_ops_insns (buf, p - buf); | |
2815 | } | |
2816 | ||
2817 | /* Implementation of emit_ops method "emit_call". */ | |
2818 | ||
2819 | static void | |
2820 | aarch64_emit_call (CORE_ADDR fn) | |
2821 | { | |
2822 | uint32_t buf[16]; | |
2823 | uint32_t *p = buf; | |
2824 | ||
2825 | p += emit_mov_addr (p, ip0, fn); | |
2826 | p += emit_blr (p, ip0); | |
2827 | ||
2828 | emit_ops_insns (buf, p - buf); | |
2829 | } | |
2830 | ||
2831 | /* Implementation of emit_ops method "emit_reg". */ | |
2832 | ||
2833 | static void | |
2834 | aarch64_emit_reg (int reg) | |
2835 | { | |
2836 | uint32_t buf[16]; | |
2837 | uint32_t *p = buf; | |
2838 | ||
2839 | /* Set x0 to unsigned char *regs. */ | |
2840 | p += emit_sub (p, x0, fp, immediate_operand (2 * 8)); | |
2841 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2842 | p += emit_mov (p, x1, immediate_operand (reg)); | |
2843 | ||
2844 | emit_ops_insns (buf, p - buf); | |
2845 | ||
2846 | aarch64_emit_call (get_raw_reg_func_addr ()); | |
2847 | } | |
2848 | ||
2849 | /* Implementation of emit_ops method "emit_pop". */ | |
2850 | ||
2851 | static void | |
2852 | aarch64_emit_pop (void) | |
2853 | { | |
2854 | uint32_t buf[16]; | |
2855 | uint32_t *p = buf; | |
2856 | ||
2857 | p += emit_pop (p, x0); | |
2858 | ||
2859 | emit_ops_insns (buf, p - buf); | |
2860 | } | |
2861 | ||
2862 | /* Implementation of emit_ops method "emit_stack_flush". */ | |
2863 | ||
2864 | static void | |
2865 | aarch64_emit_stack_flush (void) | |
2866 | { | |
2867 | uint32_t buf[16]; | |
2868 | uint32_t *p = buf; | |
2869 | ||
2870 | p += emit_push (p, x0); | |
2871 | ||
2872 | emit_ops_insns (buf, p - buf); | |
2873 | } | |
2874 | ||
2875 | /* Implementation of emit_ops method "emit_zero_ext". */ | |
2876 | ||
2877 | static void | |
2878 | aarch64_emit_zero_ext (int arg) | |
2879 | { | |
2880 | uint32_t buf[16]; | |
2881 | uint32_t *p = buf; | |
2882 | ||
2883 | p += emit_ubfx (p, x0, x0, 0, arg); | |
2884 | ||
2885 | emit_ops_insns (buf, p - buf); | |
2886 | } | |
2887 | ||
2888 | /* Implementation of emit_ops method "emit_swap". */ | |
2889 | ||
2890 | static void | |
2891 | aarch64_emit_swap (void) | |
2892 | { | |
2893 | uint32_t buf[16]; | |
2894 | uint32_t *p = buf; | |
2895 | ||
2896 | p += emit_ldr (p, x1, sp, offset_memory_operand (0 * 16)); | |
2897 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2898 | p += emit_mov (p, x0, register_operand (x1)); | |
2899 | ||
2900 | emit_ops_insns (buf, p - buf); | |
2901 | } | |
2902 | ||
2903 | /* Implementation of emit_ops method "emit_stack_adjust". */ | |
2904 | ||
2905 | static void | |
2906 | aarch64_emit_stack_adjust (int n) | |
2907 | { | |
2908 | /* This is not needed with our design. */ | |
2909 | uint32_t buf[16]; | |
2910 | uint32_t *p = buf; | |
2911 | ||
2912 | p += emit_add (p, sp, sp, immediate_operand (n * 16)); | |
2913 | ||
2914 | emit_ops_insns (buf, p - buf); | |
2915 | } | |
2916 | ||
2917 | /* Implementation of emit_ops method "emit_int_call_1". */ | |
2918 | ||
2919 | static void | |
2920 | aarch64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2921 | { | |
2922 | uint32_t buf[16]; | |
2923 | uint32_t *p = buf; | |
2924 | ||
2925 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2926 | ||
2927 | emit_ops_insns (buf, p - buf); | |
2928 | ||
2929 | aarch64_emit_call (fn); | |
2930 | } | |
2931 | ||
2932 | /* Implementation of emit_ops method "emit_void_call_2". */ | |
2933 | ||
2934 | static void | |
2935 | aarch64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2936 | { | |
2937 | uint32_t buf[16]; | |
2938 | uint32_t *p = buf; | |
2939 | ||
2940 | /* Push x0 on the stack. */ | |
2941 | aarch64_emit_stack_flush (); | |
2942 | ||
2943 | /* Setup arguments for the function call: | |
2944 | ||
2945 | x0: arg1 | |
2946 | x1: top of the stack | |
2947 | ||
2948 | MOV x1, x0 | |
2949 | MOV x0, #arg1 */ | |
2950 | ||
2951 | p += emit_mov (p, x1, register_operand (x0)); | |
2952 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2953 | ||
2954 | emit_ops_insns (buf, p - buf); | |
2955 | ||
2956 | aarch64_emit_call (fn); | |
2957 | ||
2958 | /* Restore x0. */ | |
2959 | aarch64_emit_pop (); | |
2960 | } | |
2961 | ||
2962 | /* Implementation of emit_ops method "emit_eq_goto". */ | |
2963 | ||
2964 | static void | |
2965 | aarch64_emit_eq_goto (int *offset_p, int *size_p) | |
2966 | { | |
2967 | uint32_t buf[16]; | |
2968 | uint32_t *p = buf; | |
2969 | ||
2970 | p += emit_pop (p, x1); | |
2971 | p += emit_cmp (p, x1, register_operand (x0)); | |
2972 | /* Branch over the next instruction if x0 != x1. */ | |
2973 | p += emit_bcond (p, NE, 8); | |
2974 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2975 | if (offset_p) | |
2976 | *offset_p = (p - buf) * 4; | |
2977 | if (size_p) | |
2978 | *size_p = 4; | |
2979 | p += emit_nop (p); | |
2980 | ||
2981 | emit_ops_insns (buf, p - buf); | |
2982 | } | |
2983 | ||
2984 | /* Implementation of emit_ops method "emit_ne_goto". */ | |
2985 | ||
2986 | static void | |
2987 | aarch64_emit_ne_goto (int *offset_p, int *size_p) | |
2988 | { | |
2989 | uint32_t buf[16]; | |
2990 | uint32_t *p = buf; | |
2991 | ||
2992 | p += emit_pop (p, x1); | |
2993 | p += emit_cmp (p, x1, register_operand (x0)); | |
2994 | /* Branch over the next instruction if x0 == x1. */ | |
2995 | p += emit_bcond (p, EQ, 8); | |
2996 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2997 | if (offset_p) | |
2998 | *offset_p = (p - buf) * 4; | |
2999 | if (size_p) | |
3000 | *size_p = 4; | |
3001 | p += emit_nop (p); | |
3002 | ||
3003 | emit_ops_insns (buf, p - buf); | |
3004 | } | |
3005 | ||
3006 | /* Implementation of emit_ops method "emit_lt_goto". */ | |
3007 | ||
3008 | static void | |
3009 | aarch64_emit_lt_goto (int *offset_p, int *size_p) | |
3010 | { | |
3011 | uint32_t buf[16]; | |
3012 | uint32_t *p = buf; | |
3013 | ||
3014 | p += emit_pop (p, x1); | |
3015 | p += emit_cmp (p, x1, register_operand (x0)); | |
3016 | /* Branch over the next instruction if x0 >= x1. */ | |
3017 | p += emit_bcond (p, GE, 8); | |
3018 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3019 | if (offset_p) | |
3020 | *offset_p = (p - buf) * 4; | |
3021 | if (size_p) | |
3022 | *size_p = 4; | |
3023 | p += emit_nop (p); | |
3024 | ||
3025 | emit_ops_insns (buf, p - buf); | |
3026 | } | |
3027 | ||
3028 | /* Implementation of emit_ops method "emit_le_goto". */ | |
3029 | ||
3030 | static void | |
3031 | aarch64_emit_le_goto (int *offset_p, int *size_p) | |
3032 | { | |
3033 | uint32_t buf[16]; | |
3034 | uint32_t *p = buf; | |
3035 | ||
3036 | p += emit_pop (p, x1); | |
3037 | p += emit_cmp (p, x1, register_operand (x0)); | |
3038 | /* Branch over the next instruction if x0 > x1. */ | |
3039 | p += emit_bcond (p, GT, 8); | |
3040 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3041 | if (offset_p) | |
3042 | *offset_p = (p - buf) * 4; | |
3043 | if (size_p) | |
3044 | *size_p = 4; | |
3045 | p += emit_nop (p); | |
3046 | ||
3047 | emit_ops_insns (buf, p - buf); | |
3048 | } | |
3049 | ||
3050 | /* Implementation of emit_ops method "emit_gt_goto". */ | |
3051 | ||
3052 | static void | |
3053 | aarch64_emit_gt_goto (int *offset_p, int *size_p) | |
3054 | { | |
3055 | uint32_t buf[16]; | |
3056 | uint32_t *p = buf; | |
3057 | ||
3058 | p += emit_pop (p, x1); | |
3059 | p += emit_cmp (p, x1, register_operand (x0)); | |
3060 | /* Branch over the next instruction if x0 <= x1. */ | |
3061 | p += emit_bcond (p, LE, 8); | |
3062 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3063 | if (offset_p) | |
3064 | *offset_p = (p - buf) * 4; | |
3065 | if (size_p) | |
3066 | *size_p = 4; | |
3067 | p += emit_nop (p); | |
3068 | ||
3069 | emit_ops_insns (buf, p - buf); | |
3070 | } | |
3071 | ||
3072 | /* Implementation of emit_ops method "emit_ge_got". */ | |
3073 | ||
3074 | static void | |
3075 | aarch64_emit_ge_got (int *offset_p, int *size_p) | |
3076 | { | |
3077 | uint32_t buf[16]; | |
3078 | uint32_t *p = buf; | |
3079 | ||
3080 | p += emit_pop (p, x1); | |
3081 | p += emit_cmp (p, x1, register_operand (x0)); | |
3082 | /* Branch over the next instruction if x0 <= x1. */ | |
3083 | p += emit_bcond (p, LT, 8); | |
3084 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3085 | if (offset_p) | |
3086 | *offset_p = (p - buf) * 4; | |
3087 | if (size_p) | |
3088 | *size_p = 4; | |
3089 | p += emit_nop (p); | |
3090 | ||
3091 | emit_ops_insns (buf, p - buf); | |
3092 | } | |
3093 | ||
3094 | static struct emit_ops aarch64_emit_ops_impl = | |
3095 | { | |
3096 | aarch64_emit_prologue, | |
3097 | aarch64_emit_epilogue, | |
3098 | aarch64_emit_add, | |
3099 | aarch64_emit_sub, | |
3100 | aarch64_emit_mul, | |
3101 | aarch64_emit_lsh, | |
3102 | aarch64_emit_rsh_signed, | |
3103 | aarch64_emit_rsh_unsigned, | |
3104 | aarch64_emit_ext, | |
3105 | aarch64_emit_log_not, | |
3106 | aarch64_emit_bit_and, | |
3107 | aarch64_emit_bit_or, | |
3108 | aarch64_emit_bit_xor, | |
3109 | aarch64_emit_bit_not, | |
3110 | aarch64_emit_equal, | |
3111 | aarch64_emit_less_signed, | |
3112 | aarch64_emit_less_unsigned, | |
3113 | aarch64_emit_ref, | |
3114 | aarch64_emit_if_goto, | |
3115 | aarch64_emit_goto, | |
3116 | aarch64_write_goto_address, | |
3117 | aarch64_emit_const, | |
3118 | aarch64_emit_call, | |
3119 | aarch64_emit_reg, | |
3120 | aarch64_emit_pop, | |
3121 | aarch64_emit_stack_flush, | |
3122 | aarch64_emit_zero_ext, | |
3123 | aarch64_emit_swap, | |
3124 | aarch64_emit_stack_adjust, | |
3125 | aarch64_emit_int_call_1, | |
3126 | aarch64_emit_void_call_2, | |
3127 | aarch64_emit_eq_goto, | |
3128 | aarch64_emit_ne_goto, | |
3129 | aarch64_emit_lt_goto, | |
3130 | aarch64_emit_le_goto, | |
3131 | aarch64_emit_gt_goto, | |
3132 | aarch64_emit_ge_got, | |
3133 | }; | |
3134 | ||
ab64c999 | 3135 | /* Implementation of target ops method "emit_ops". */ |
afbe19f8 | 3136 | |
ab64c999 TBA |
3137 | emit_ops * |
3138 | aarch64_target::emit_ops () | |
afbe19f8 PL |
3139 | { |
3140 | return &aarch64_emit_ops_impl; | |
3141 | } | |
3142 | ||
809a0c35 | 3143 | /* Implementation of target ops method |
bb903df0 PL |
3144 | "get_min_fast_tracepoint_insn_len". */ |
3145 | ||
809a0c35 TBA |
3146 | int |
3147 | aarch64_target::get_min_fast_tracepoint_insn_len () | |
bb903df0 PL |
3148 | { |
3149 | return 4; | |
3150 | } | |
3151 | ||
9cfd8715 | 3152 | /* Implementation of linux target ops method "low_supports_range_stepping". */ |
d1d0aea1 | 3153 | |
9cfd8715 TBA |
3154 | bool |
3155 | aarch64_target::low_supports_range_stepping () | |
d1d0aea1 | 3156 | { |
9cfd8715 | 3157 | return true; |
d1d0aea1 PL |
3158 | } |
3159 | ||
3ca4edb6 | 3160 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 3161 | |
3ca4edb6 TBA |
3162 | const gdb_byte * |
3163 | aarch64_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 | 3164 | { |
17b1509a YQ |
3165 | if (is_64bit_tdesc ()) |
3166 | { | |
3167 | *size = aarch64_breakpoint_len; | |
3168 | return aarch64_breakpoint; | |
3169 | } | |
3170 | else | |
3171 | return arm_sw_breakpoint_from_kind (kind, size); | |
3172 | } | |
3173 | ||
06250e4e | 3174 | /* Implementation of target ops method "breakpoint_kind_from_pc". */ |
17b1509a | 3175 | |
06250e4e TBA |
3176 | int |
3177 | aarch64_target::breakpoint_kind_from_pc (CORE_ADDR *pcptr) | |
17b1509a YQ |
3178 | { |
3179 | if (is_64bit_tdesc ()) | |
3180 | return aarch64_breakpoint_len; | |
3181 | else | |
3182 | return arm_breakpoint_kind_from_pc (pcptr); | |
3183 | } | |
3184 | ||
06250e4e | 3185 | /* Implementation of the target ops method |
17b1509a YQ |
3186 | "breakpoint_kind_from_current_state". */ |
3187 | ||
06250e4e TBA |
3188 | int |
3189 | aarch64_target::breakpoint_kind_from_current_state (CORE_ADDR *pcptr) | |
17b1509a YQ |
3190 | { |
3191 | if (is_64bit_tdesc ()) | |
3192 | return aarch64_breakpoint_len; | |
3193 | else | |
3194 | return arm_breakpoint_kind_from_current_state (pcptr); | |
dd373349 AT |
3195 | } |
3196 | ||
ef0478f6 TBA |
3197 | /* The linux target ops object. */ |
3198 | ||
3199 | linux_process_target *the_linux_target = &the_aarch64_target; | |
3200 | ||
3aee8918 PA |
3201 | void |
3202 | initialize_low_arch (void) | |
3203 | { | |
3b53ae99 YQ |
3204 | initialize_low_arch_aarch32 (); |
3205 | ||
3aee8918 | 3206 | initialize_regsets_info (&aarch64_regsets_info); |
02895270 | 3207 | initialize_regsets_info (&aarch64_sve_regsets_info); |
3aee8918 | 3208 | } |