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 | ||
b811d2c2 | 4 | Copyright (C) 2009-2020 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" |
7cc17433 | 43 | #include "linux-aarch32-tdesc.h" |
d6d7ce56 | 44 | #include "linux-aarch64-tdesc.h" |
fefa175e | 45 | #include "nat/aarch64-sve-linux-ptrace.h" |
02895270 | 46 | #include "tdesc.h" |
176eb98c | 47 | |
176eb98c MS |
48 | #ifdef HAVE_SYS_REG_H |
49 | #include <sys/reg.h> | |
50 | #endif | |
51 | ||
ef0478f6 TBA |
52 | /* Linux target op definitions for the AArch64 architecture. */ |
53 | ||
54 | class aarch64_target : public linux_process_target | |
55 | { | |
56 | public: | |
57 | ||
aa8d21c9 TBA |
58 | const regs_info *get_regs_info () override; |
59 | ||
06250e4e TBA |
60 | int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override; |
61 | ||
62 | int breakpoint_kind_from_current_state (CORE_ADDR *pcptr) override; | |
63 | ||
797bcff5 TBA |
64 | protected: |
65 | ||
66 | void low_arch_setup () override; | |
daca57a7 TBA |
67 | |
68 | bool low_cannot_fetch_register (int regno) override; | |
69 | ||
70 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
71 | |
72 | bool low_supports_breakpoints () override; | |
73 | ||
74 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
75 | ||
76 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
ef0478f6 TBA |
77 | }; |
78 | ||
79 | /* The singleton target ops object. */ | |
80 | ||
81 | static aarch64_target the_aarch64_target; | |
82 | ||
daca57a7 TBA |
83 | bool |
84 | aarch64_target::low_cannot_fetch_register (int regno) | |
85 | { | |
86 | gdb_assert_not_reached ("linux target op low_cannot_fetch_register " | |
87 | "is not implemented by the target"); | |
88 | } | |
89 | ||
90 | bool | |
91 | aarch64_target::low_cannot_store_register (int regno) | |
92 | { | |
93 | gdb_assert_not_reached ("linux target op low_cannot_store_register " | |
94 | "is not implemented by the target"); | |
95 | } | |
96 | ||
176eb98c MS |
97 | /* Per-process arch-specific data we want to keep. */ |
98 | ||
99 | struct arch_process_info | |
100 | { | |
101 | /* Hardware breakpoint/watchpoint data. | |
102 | The reason for them to be per-process rather than per-thread is | |
103 | due to the lack of information in the gdbserver environment; | |
104 | gdbserver is not told that whether a requested hardware | |
105 | breakpoint/watchpoint is thread specific or not, so it has to set | |
106 | each hw bp/wp for every thread in the current process. The | |
107 | higher level bp/wp management in gdb will resume a thread if a hw | |
108 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
109 | same for each thread, it is reasonable for the data to live here. | |
110 | */ | |
111 | struct aarch64_debug_reg_state debug_reg_state; | |
112 | }; | |
113 | ||
3b53ae99 YQ |
114 | /* Return true if the size of register 0 is 8 byte. */ |
115 | ||
116 | static int | |
117 | is_64bit_tdesc (void) | |
118 | { | |
119 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
120 | ||
121 | return register_size (regcache->tdesc, 0) == 8; | |
122 | } | |
123 | ||
02895270 AH |
124 | /* Return true if the regcache contains the number of SVE registers. */ |
125 | ||
126 | static bool | |
127 | is_sve_tdesc (void) | |
128 | { | |
129 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
130 | ||
6cdd651f | 131 | return tdesc_contains_feature (regcache->tdesc, "org.gnu.gdb.aarch64.sve"); |
02895270 AH |
132 | } |
133 | ||
176eb98c MS |
134 | static void |
135 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
136 | { | |
6a69a054 | 137 | struct user_pt_regs *regset = (struct user_pt_regs *) buf; |
176eb98c MS |
138 | int i; |
139 | ||
140 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
141 | collect_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
142 | collect_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
143 | collect_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
144 | collect_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
145 | } |
146 | ||
147 | static void | |
148 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
149 | { | |
6a69a054 | 150 | const struct user_pt_regs *regset = (const struct user_pt_regs *) buf; |
176eb98c MS |
151 | int i; |
152 | ||
153 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
154 | supply_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
155 | supply_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
156 | supply_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
157 | supply_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
158 | } |
159 | ||
160 | static void | |
161 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
162 | { | |
9caa3311 | 163 | struct user_fpsimd_state *regset = (struct user_fpsimd_state *) buf; |
176eb98c MS |
164 | int i; |
165 | ||
166 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
167 | collect_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
168 | collect_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
169 | collect_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
170 | } |
171 | ||
172 | static void | |
173 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
174 | { | |
9caa3311 YQ |
175 | const struct user_fpsimd_state *regset |
176 | = (const struct user_fpsimd_state *) buf; | |
176eb98c MS |
177 | int i; |
178 | ||
179 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
180 | supply_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
181 | supply_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
182 | supply_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
183 | } |
184 | ||
1ef53e6b AH |
185 | /* Store the pauth registers to regcache. */ |
186 | ||
187 | static void | |
188 | aarch64_store_pauthregset (struct regcache *regcache, const void *buf) | |
189 | { | |
190 | uint64_t *pauth_regset = (uint64_t *) buf; | |
191 | int pauth_base = find_regno (regcache->tdesc, "pauth_dmask"); | |
192 | ||
193 | if (pauth_base == 0) | |
194 | return; | |
195 | ||
196 | supply_register (regcache, AARCH64_PAUTH_DMASK_REGNUM (pauth_base), | |
197 | &pauth_regset[0]); | |
198 | supply_register (regcache, AARCH64_PAUTH_CMASK_REGNUM (pauth_base), | |
199 | &pauth_regset[1]); | |
200 | } | |
201 | ||
bf9ae9d8 TBA |
202 | bool |
203 | aarch64_target::low_supports_breakpoints () | |
204 | { | |
205 | return true; | |
206 | } | |
207 | ||
208 | /* Implementation of linux target ops method "low_get_pc". */ | |
421530db | 209 | |
bf9ae9d8 TBA |
210 | CORE_ADDR |
211 | aarch64_target::low_get_pc (regcache *regcache) | |
176eb98c | 212 | { |
8a7e4587 | 213 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 214 | return linux_get_pc_64bit (regcache); |
8a7e4587 | 215 | else |
a5652c21 | 216 | return linux_get_pc_32bit (regcache); |
176eb98c MS |
217 | } |
218 | ||
bf9ae9d8 | 219 | /* Implementation of linux target ops method "low_set_pc". */ |
421530db | 220 | |
bf9ae9d8 TBA |
221 | void |
222 | aarch64_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
176eb98c | 223 | { |
8a7e4587 | 224 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 225 | linux_set_pc_64bit (regcache, pc); |
8a7e4587 | 226 | else |
a5652c21 | 227 | linux_set_pc_32bit (regcache, pc); |
176eb98c MS |
228 | } |
229 | ||
176eb98c MS |
230 | #define aarch64_breakpoint_len 4 |
231 | ||
37d66942 PL |
232 | /* AArch64 BRK software debug mode instruction. |
233 | This instruction needs to match gdb/aarch64-tdep.c | |
234 | (aarch64_default_breakpoint). */ | |
235 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 236 | |
421530db PL |
237 | /* Implementation of linux_target_ops method "breakpoint_at". */ |
238 | ||
176eb98c MS |
239 | static int |
240 | aarch64_breakpoint_at (CORE_ADDR where) | |
241 | { | |
db91f502 YQ |
242 | if (is_64bit_tdesc ()) |
243 | { | |
244 | gdb_byte insn[aarch64_breakpoint_len]; | |
176eb98c | 245 | |
52405d85 TBA |
246 | the_target->read_memory (where, (unsigned char *) &insn, |
247 | aarch64_breakpoint_len); | |
db91f502 YQ |
248 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) |
249 | return 1; | |
176eb98c | 250 | |
db91f502 YQ |
251 | return 0; |
252 | } | |
253 | else | |
254 | return arm_breakpoint_at (where); | |
176eb98c MS |
255 | } |
256 | ||
176eb98c MS |
257 | static void |
258 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
259 | { | |
260 | int i; | |
261 | ||
262 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
263 | { | |
264 | state->dr_addr_bp[i] = 0; | |
265 | state->dr_ctrl_bp[i] = 0; | |
266 | state->dr_ref_count_bp[i] = 0; | |
267 | } | |
268 | ||
269 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
270 | { | |
271 | state->dr_addr_wp[i] = 0; | |
272 | state->dr_ctrl_wp[i] = 0; | |
273 | state->dr_ref_count_wp[i] = 0; | |
274 | } | |
275 | } | |
276 | ||
176eb98c MS |
277 | /* Return the pointer to the debug register state structure in the |
278 | current process' arch-specific data area. */ | |
279 | ||
db3cb7cb | 280 | struct aarch64_debug_reg_state * |
88e2cf7e | 281 | aarch64_get_debug_reg_state (pid_t pid) |
176eb98c | 282 | { |
88e2cf7e | 283 | struct process_info *proc = find_process_pid (pid); |
176eb98c | 284 | |
fe978cb0 | 285 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
286 | } |
287 | ||
421530db PL |
288 | /* Implementation of linux_target_ops method "supports_z_point_type". */ |
289 | ||
4ff0d3d8 PA |
290 | static int |
291 | aarch64_supports_z_point_type (char z_type) | |
292 | { | |
293 | switch (z_type) | |
294 | { | |
96c97461 | 295 | case Z_PACKET_SW_BP: |
4ff0d3d8 PA |
296 | case Z_PACKET_HW_BP: |
297 | case Z_PACKET_WRITE_WP: | |
298 | case Z_PACKET_READ_WP: | |
299 | case Z_PACKET_ACCESS_WP: | |
300 | return 1; | |
301 | default: | |
4ff0d3d8 PA |
302 | return 0; |
303 | } | |
304 | } | |
305 | ||
421530db | 306 | /* Implementation of linux_target_ops method "insert_point". |
176eb98c | 307 | |
421530db PL |
308 | It actually only records the info of the to-be-inserted bp/wp; |
309 | the actual insertion will happen when threads are resumed. */ | |
176eb98c MS |
310 | |
311 | static int | |
802e8e6d PA |
312 | aarch64_insert_point (enum raw_bkpt_type type, CORE_ADDR addr, |
313 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
314 | { |
315 | int ret; | |
4ff0d3d8 | 316 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
317 | struct aarch64_debug_reg_state *state |
318 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 319 | |
c5e92cca | 320 | if (show_debug_regs) |
176eb98c MS |
321 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
322 | (unsigned long) addr, len); | |
323 | ||
802e8e6d PA |
324 | /* Determine the type from the raw breakpoint type. */ |
325 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
326 | |
327 | if (targ_type != hw_execute) | |
39edd165 YQ |
328 | { |
329 | if (aarch64_linux_region_ok_for_watchpoint (addr, len)) | |
330 | ret = aarch64_handle_watchpoint (targ_type, addr, len, | |
331 | 1 /* is_insert */, state); | |
332 | else | |
333 | ret = -1; | |
334 | } | |
176eb98c | 335 | else |
8d689ee5 YQ |
336 | { |
337 | if (len == 3) | |
338 | { | |
339 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
340 | instruction. Set it to 2 to correctly encode length bit | |
341 | mask in hardware/watchpoint control register. */ | |
342 | len = 2; | |
343 | } | |
344 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
345 | 1 /* is_insert */, state); | |
346 | } | |
176eb98c | 347 | |
60a191ed | 348 | if (show_debug_regs) |
88e2cf7e YQ |
349 | aarch64_show_debug_reg_state (state, "insert_point", addr, len, |
350 | targ_type); | |
176eb98c MS |
351 | |
352 | return ret; | |
353 | } | |
354 | ||
421530db | 355 | /* Implementation of linux_target_ops method "remove_point". |
176eb98c | 356 | |
421530db PL |
357 | It actually only records the info of the to-be-removed bp/wp, |
358 | the actual removal will be done when threads are resumed. */ | |
176eb98c MS |
359 | |
360 | static int | |
802e8e6d PA |
361 | aarch64_remove_point (enum raw_bkpt_type type, CORE_ADDR addr, |
362 | int len, struct raw_breakpoint *bp) | |
176eb98c MS |
363 | { |
364 | int ret; | |
4ff0d3d8 | 365 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
366 | struct aarch64_debug_reg_state *state |
367 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 368 | |
c5e92cca | 369 | if (show_debug_regs) |
176eb98c MS |
370 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
371 | (unsigned long) addr, len); | |
372 | ||
802e8e6d PA |
373 | /* Determine the type from the raw breakpoint type. */ |
374 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
375 | |
376 | /* Set up state pointers. */ | |
377 | if (targ_type != hw_execute) | |
378 | ret = | |
c67ca4de YQ |
379 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
380 | state); | |
176eb98c | 381 | else |
8d689ee5 YQ |
382 | { |
383 | if (len == 3) | |
384 | { | |
385 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
386 | instruction. Set it to 2 to correctly encode length bit | |
387 | mask in hardware/watchpoint control register. */ | |
388 | len = 2; | |
389 | } | |
390 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
391 | 0 /* is_insert */, state); | |
392 | } | |
176eb98c | 393 | |
60a191ed | 394 | if (show_debug_regs) |
88e2cf7e YQ |
395 | aarch64_show_debug_reg_state (state, "remove_point", addr, len, |
396 | targ_type); | |
176eb98c MS |
397 | |
398 | return ret; | |
399 | } | |
400 | ||
421530db | 401 | /* Implementation of linux_target_ops method "stopped_data_address". */ |
176eb98c MS |
402 | |
403 | static CORE_ADDR | |
404 | aarch64_stopped_data_address (void) | |
405 | { | |
406 | siginfo_t siginfo; | |
407 | int pid, i; | |
408 | struct aarch64_debug_reg_state *state; | |
409 | ||
0bfdf32f | 410 | pid = lwpid_of (current_thread); |
176eb98c MS |
411 | |
412 | /* Get the siginfo. */ | |
413 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
414 | return (CORE_ADDR) 0; | |
415 | ||
416 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
417 | if (siginfo.si_signo != SIGTRAP | |
418 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
419 | return (CORE_ADDR) 0; | |
420 | ||
421 | /* Check if the address matches any watched address. */ | |
88e2cf7e | 422 | state = aarch64_get_debug_reg_state (pid_of (current_thread)); |
176eb98c MS |
423 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) |
424 | { | |
a3b60e45 JK |
425 | const unsigned int offset |
426 | = aarch64_watchpoint_offset (state->dr_ctrl_wp[i]); | |
176eb98c MS |
427 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); |
428 | const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr; | |
a3b60e45 JK |
429 | const CORE_ADDR addr_watch = state->dr_addr_wp[i] + offset; |
430 | const CORE_ADDR addr_watch_aligned = align_down (state->dr_addr_wp[i], 8); | |
431 | const CORE_ADDR addr_orig = state->dr_addr_orig_wp[i]; | |
432 | ||
176eb98c MS |
433 | if (state->dr_ref_count_wp[i] |
434 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
a3b60e45 | 435 | && addr_trap >= addr_watch_aligned |
176eb98c | 436 | && addr_trap < addr_watch + len) |
a3b60e45 JK |
437 | { |
438 | /* ADDR_TRAP reports the first address of the memory range | |
439 | accessed by the CPU, regardless of what was the memory | |
440 | range watched. Thus, a large CPU access that straddles | |
441 | the ADDR_WATCH..ADDR_WATCH+LEN range may result in an | |
442 | ADDR_TRAP that is lower than the | |
443 | ADDR_WATCH..ADDR_WATCH+LEN range. E.g.: | |
444 | ||
445 | addr: | 4 | 5 | 6 | 7 | 8 | | |
446 | |---- range watched ----| | |
447 | |----------- range accessed ------------| | |
448 | ||
449 | In this case, ADDR_TRAP will be 4. | |
450 | ||
451 | To match a watchpoint known to GDB core, we must never | |
452 | report *ADDR_P outside of any ADDR_WATCH..ADDR_WATCH+LEN | |
453 | range. ADDR_WATCH <= ADDR_TRAP < ADDR_ORIG is a false | |
454 | positive on kernels older than 4.10. See PR | |
455 | external/20207. */ | |
456 | return addr_orig; | |
457 | } | |
176eb98c MS |
458 | } |
459 | ||
460 | return (CORE_ADDR) 0; | |
461 | } | |
462 | ||
421530db | 463 | /* Implementation of linux_target_ops method "stopped_by_watchpoint". */ |
176eb98c MS |
464 | |
465 | static int | |
466 | aarch64_stopped_by_watchpoint (void) | |
467 | { | |
468 | if (aarch64_stopped_data_address () != 0) | |
469 | return 1; | |
470 | else | |
471 | return 0; | |
472 | } | |
473 | ||
474 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
475 | ||
476 | ps_err_e | |
754653a7 | 477 | ps_get_thread_area (struct ps_prochandle *ph, |
176eb98c MS |
478 | lwpid_t lwpid, int idx, void **base) |
479 | { | |
a0cc84cd YQ |
480 | return aarch64_ps_get_thread_area (ph, lwpid, idx, base, |
481 | is_64bit_tdesc ()); | |
176eb98c MS |
482 | } |
483 | ||
ade90bde YQ |
484 | /* Implementation of linux_target_ops method "siginfo_fixup". */ |
485 | ||
486 | static int | |
8adce034 | 487 | aarch64_linux_siginfo_fixup (siginfo_t *native, gdb_byte *inf, int direction) |
ade90bde YQ |
488 | { |
489 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ | |
490 | if (!is_64bit_tdesc ()) | |
491 | { | |
492 | if (direction == 0) | |
493 | aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, | |
494 | native); | |
495 | else | |
496 | aarch64_siginfo_from_compat_siginfo (native, | |
497 | (struct compat_siginfo *) inf); | |
498 | ||
499 | return 1; | |
500 | } | |
501 | ||
502 | return 0; | |
503 | } | |
504 | ||
04ec7890 | 505 | /* Implementation of linux_target_ops method "new_process". */ |
176eb98c MS |
506 | |
507 | static struct arch_process_info * | |
508 | aarch64_linux_new_process (void) | |
509 | { | |
8d749320 | 510 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
176eb98c MS |
511 | |
512 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
513 | ||
514 | return info; | |
515 | } | |
516 | ||
04ec7890 SM |
517 | /* Implementation of linux_target_ops method "delete_process". */ |
518 | ||
519 | static void | |
520 | aarch64_linux_delete_process (struct arch_process_info *info) | |
521 | { | |
522 | xfree (info); | |
523 | } | |
524 | ||
421530db PL |
525 | /* Implementation of linux_target_ops method "linux_new_fork". */ |
526 | ||
3a8a0396 DB |
527 | static void |
528 | aarch64_linux_new_fork (struct process_info *parent, | |
529 | struct process_info *child) | |
530 | { | |
531 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
532 | gdb_assert (parent->priv != NULL |
533 | && parent->priv->arch_private != NULL); | |
534 | gdb_assert (child->priv != NULL | |
535 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
536 | |
537 | /* Linux kernel before 2.6.33 commit | |
538 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
539 | will inherit hardware debug registers from parent | |
540 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
541 | zeroed debug registers. | |
542 | ||
543 | GDB core assumes the child inherits the watchpoints/hw | |
544 | breakpoints of the parent, and will remove them all from the | |
545 | forked off process. Copy the debug registers mirrors into the | |
546 | new process so that all breakpoints and watchpoints can be | |
547 | removed together. The debug registers mirror will become zeroed | |
548 | in the end before detaching the forked off process, thus making | |
549 | this compatible with older Linux kernels too. */ | |
550 | ||
61a7418c | 551 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
552 | } |
553 | ||
ee4fbcfa AH |
554 | /* Matches HWCAP_PACA in kernel header arch/arm64/include/uapi/asm/hwcap.h. */ |
555 | #define AARCH64_HWCAP_PACA (1 << 30) | |
556 | ||
797bcff5 | 557 | /* Implementation of linux target ops method "low_arch_setup". */ |
3b53ae99 | 558 | |
797bcff5 TBA |
559 | void |
560 | aarch64_target::low_arch_setup () | |
3b53ae99 YQ |
561 | { |
562 | unsigned int machine; | |
563 | int is_elf64; | |
564 | int tid; | |
565 | ||
566 | tid = lwpid_of (current_thread); | |
567 | ||
568 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
569 | ||
570 | if (is_elf64) | |
fefa175e AH |
571 | { |
572 | uint64_t vq = aarch64_sve_get_vq (tid); | |
974c89e0 AH |
573 | unsigned long hwcap = linux_get_hwcap (8); |
574 | bool pauth_p = hwcap & AARCH64_HWCAP_PACA; | |
ee4fbcfa AH |
575 | |
576 | current_process ()->tdesc = aarch64_linux_read_description (vq, pauth_p); | |
fefa175e | 577 | } |
3b53ae99 | 578 | else |
7cc17433 | 579 | current_process ()->tdesc = aarch32_linux_read_description (); |
176eb98c | 580 | |
af1b22f3 | 581 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
582 | } |
583 | ||
02895270 AH |
584 | /* Wrapper for aarch64_sve_regs_copy_to_reg_buf. */ |
585 | ||
586 | static void | |
587 | aarch64_sve_regs_copy_to_regcache (struct regcache *regcache, const void *buf) | |
588 | { | |
589 | return aarch64_sve_regs_copy_to_reg_buf (regcache, buf); | |
590 | } | |
591 | ||
592 | /* Wrapper for aarch64_sve_regs_copy_from_reg_buf. */ | |
593 | ||
594 | static void | |
595 | aarch64_sve_regs_copy_from_regcache (struct regcache *regcache, void *buf) | |
596 | { | |
597 | return aarch64_sve_regs_copy_from_reg_buf (regcache, buf); | |
598 | } | |
599 | ||
3aee8918 | 600 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
601 | { |
602 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
603 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
604 | aarch64_fill_gregset, aarch64_store_gregset }, | |
605 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
606 | sizeof (struct user_fpsimd_state), FP_REGS, | |
607 | aarch64_fill_fpregset, aarch64_store_fpregset | |
608 | }, | |
1ef53e6b AH |
609 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
610 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
611 | NULL, aarch64_store_pauthregset }, | |
50bc912a | 612 | NULL_REGSET |
176eb98c MS |
613 | }; |
614 | ||
3aee8918 PA |
615 | static struct regsets_info aarch64_regsets_info = |
616 | { | |
617 | aarch64_regsets, /* regsets */ | |
618 | 0, /* num_regsets */ | |
619 | NULL, /* disabled_regsets */ | |
620 | }; | |
621 | ||
3b53ae99 | 622 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
623 | { |
624 | NULL, /* regset_bitmap */ | |
c2d65f38 | 625 | NULL, /* usrregs */ |
3aee8918 PA |
626 | &aarch64_regsets_info, |
627 | }; | |
628 | ||
02895270 AH |
629 | static struct regset_info aarch64_sve_regsets[] = |
630 | { | |
631 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
632 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
633 | aarch64_fill_gregset, aarch64_store_gregset }, | |
634 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_SVE, | |
635 | SVE_PT_SIZE (AARCH64_MAX_SVE_VQ, SVE_PT_REGS_SVE), EXTENDED_REGS, | |
636 | aarch64_sve_regs_copy_from_regcache, aarch64_sve_regs_copy_to_regcache | |
637 | }, | |
1ef53e6b AH |
638 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
639 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
640 | NULL, aarch64_store_pauthregset }, | |
02895270 AH |
641 | NULL_REGSET |
642 | }; | |
643 | ||
644 | static struct regsets_info aarch64_sve_regsets_info = | |
645 | { | |
646 | aarch64_sve_regsets, /* regsets. */ | |
647 | 0, /* num_regsets. */ | |
648 | NULL, /* disabled_regsets. */ | |
649 | }; | |
650 | ||
651 | static struct regs_info regs_info_aarch64_sve = | |
652 | { | |
653 | NULL, /* regset_bitmap. */ | |
654 | NULL, /* usrregs. */ | |
655 | &aarch64_sve_regsets_info, | |
656 | }; | |
657 | ||
aa8d21c9 | 658 | /* Implementation of linux target ops method "get_regs_info". */ |
421530db | 659 | |
aa8d21c9 TBA |
660 | const regs_info * |
661 | aarch64_target::get_regs_info () | |
3aee8918 | 662 | { |
02895270 | 663 | if (!is_64bit_tdesc ()) |
3b53ae99 | 664 | return ®s_info_aarch32; |
02895270 AH |
665 | |
666 | if (is_sve_tdesc ()) | |
667 | return ®s_info_aarch64_sve; | |
668 | ||
669 | return ®s_info_aarch64; | |
3aee8918 PA |
670 | } |
671 | ||
7671bf47 PL |
672 | /* Implementation of linux_target_ops method "supports_tracepoints". */ |
673 | ||
674 | static int | |
675 | aarch64_supports_tracepoints (void) | |
676 | { | |
524b57e6 YQ |
677 | if (current_thread == NULL) |
678 | return 1; | |
679 | else | |
680 | { | |
681 | /* We don't support tracepoints on aarch32 now. */ | |
682 | return is_64bit_tdesc (); | |
683 | } | |
7671bf47 PL |
684 | } |
685 | ||
bb903df0 PL |
686 | /* Implementation of linux_target_ops method "get_thread_area". */ |
687 | ||
688 | static int | |
689 | aarch64_get_thread_area (int lwpid, CORE_ADDR *addrp) | |
690 | { | |
691 | struct iovec iovec; | |
692 | uint64_t reg; | |
693 | ||
694 | iovec.iov_base = ® | |
695 | iovec.iov_len = sizeof (reg); | |
696 | ||
697 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
698 | return -1; | |
699 | ||
700 | *addrp = reg; | |
701 | ||
702 | return 0; | |
703 | } | |
704 | ||
061fc021 YQ |
705 | /* Implementation of linux_target_ops method "get_syscall_trapinfo". */ |
706 | ||
707 | static void | |
708 | aarch64_get_syscall_trapinfo (struct regcache *regcache, int *sysno) | |
709 | { | |
710 | int use_64bit = register_size (regcache->tdesc, 0) == 8; | |
711 | ||
712 | if (use_64bit) | |
713 | { | |
714 | long l_sysno; | |
715 | ||
716 | collect_register_by_name (regcache, "x8", &l_sysno); | |
717 | *sysno = (int) l_sysno; | |
718 | } | |
719 | else | |
720 | collect_register_by_name (regcache, "r7", sysno); | |
721 | } | |
722 | ||
afbe19f8 PL |
723 | /* List of condition codes that we need. */ |
724 | ||
725 | enum aarch64_condition_codes | |
726 | { | |
727 | EQ = 0x0, | |
728 | NE = 0x1, | |
729 | LO = 0x3, | |
730 | GE = 0xa, | |
731 | LT = 0xb, | |
732 | GT = 0xc, | |
733 | LE = 0xd, | |
bb903df0 PL |
734 | }; |
735 | ||
6c1c9a8b YQ |
736 | enum aarch64_operand_type |
737 | { | |
738 | OPERAND_IMMEDIATE, | |
739 | OPERAND_REGISTER, | |
740 | }; | |
741 | ||
bb903df0 PL |
742 | /* Representation of an operand. At this time, it only supports register |
743 | and immediate types. */ | |
744 | ||
745 | struct aarch64_operand | |
746 | { | |
747 | /* Type of the operand. */ | |
6c1c9a8b YQ |
748 | enum aarch64_operand_type type; |
749 | ||
bb903df0 PL |
750 | /* Value of the operand according to the type. */ |
751 | union | |
752 | { | |
753 | uint32_t imm; | |
754 | struct aarch64_register reg; | |
755 | }; | |
756 | }; | |
757 | ||
758 | /* List of registers that we are currently using, we can add more here as | |
759 | we need to use them. */ | |
760 | ||
761 | /* General purpose scratch registers (64 bit). */ | |
762 | static const struct aarch64_register x0 = { 0, 1 }; | |
763 | static const struct aarch64_register x1 = { 1, 1 }; | |
764 | static const struct aarch64_register x2 = { 2, 1 }; | |
765 | static const struct aarch64_register x3 = { 3, 1 }; | |
766 | static const struct aarch64_register x4 = { 4, 1 }; | |
767 | ||
768 | /* General purpose scratch registers (32 bit). */ | |
afbe19f8 | 769 | static const struct aarch64_register w0 = { 0, 0 }; |
bb903df0 PL |
770 | static const struct aarch64_register w2 = { 2, 0 }; |
771 | ||
772 | /* Intra-procedure scratch registers. */ | |
773 | static const struct aarch64_register ip0 = { 16, 1 }; | |
774 | ||
775 | /* Special purpose registers. */ | |
afbe19f8 PL |
776 | static const struct aarch64_register fp = { 29, 1 }; |
777 | static const struct aarch64_register lr = { 30, 1 }; | |
bb903df0 PL |
778 | static const struct aarch64_register sp = { 31, 1 }; |
779 | static const struct aarch64_register xzr = { 31, 1 }; | |
780 | ||
781 | /* Dynamically allocate a new register. If we know the register | |
782 | statically, we should make it a global as above instead of using this | |
783 | helper function. */ | |
784 | ||
785 | static struct aarch64_register | |
786 | aarch64_register (unsigned num, int is64) | |
787 | { | |
788 | return (struct aarch64_register) { num, is64 }; | |
789 | } | |
790 | ||
791 | /* Helper function to create a register operand, for instructions with | |
792 | different types of operands. | |
793 | ||
794 | For example: | |
795 | p += emit_mov (p, x0, register_operand (x1)); */ | |
796 | ||
797 | static struct aarch64_operand | |
798 | register_operand (struct aarch64_register reg) | |
799 | { | |
800 | struct aarch64_operand operand; | |
801 | ||
802 | operand.type = OPERAND_REGISTER; | |
803 | operand.reg = reg; | |
804 | ||
805 | return operand; | |
806 | } | |
807 | ||
808 | /* Helper function to create an immediate operand, for instructions with | |
809 | different types of operands. | |
810 | ||
811 | For example: | |
812 | p += emit_mov (p, x0, immediate_operand (12)); */ | |
813 | ||
814 | static struct aarch64_operand | |
815 | immediate_operand (uint32_t imm) | |
816 | { | |
817 | struct aarch64_operand operand; | |
818 | ||
819 | operand.type = OPERAND_IMMEDIATE; | |
820 | operand.imm = imm; | |
821 | ||
822 | return operand; | |
823 | } | |
824 | ||
bb903df0 PL |
825 | /* Helper function to create an offset memory operand. |
826 | ||
827 | For example: | |
828 | p += emit_ldr (p, x0, sp, offset_memory_operand (16)); */ | |
829 | ||
830 | static struct aarch64_memory_operand | |
831 | offset_memory_operand (int32_t offset) | |
832 | { | |
833 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_OFFSET, offset }; | |
834 | } | |
835 | ||
836 | /* Helper function to create a pre-index memory operand. | |
837 | ||
838 | For example: | |
839 | p += emit_ldr (p, x0, sp, preindex_memory_operand (16)); */ | |
840 | ||
841 | static struct aarch64_memory_operand | |
842 | preindex_memory_operand (int32_t index) | |
843 | { | |
844 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_PREINDEX, index }; | |
845 | } | |
846 | ||
afbe19f8 PL |
847 | /* Helper function to create a post-index memory operand. |
848 | ||
849 | For example: | |
850 | p += emit_ldr (p, x0, sp, postindex_memory_operand (16)); */ | |
851 | ||
852 | static struct aarch64_memory_operand | |
853 | postindex_memory_operand (int32_t index) | |
854 | { | |
855 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_POSTINDEX, index }; | |
856 | } | |
857 | ||
bb903df0 PL |
858 | /* System control registers. These special registers can be written and |
859 | read with the MRS and MSR instructions. | |
860 | ||
861 | - NZCV: Condition flags. GDB refers to this register under the CPSR | |
862 | name. | |
863 | - FPSR: Floating-point status register. | |
864 | - FPCR: Floating-point control registers. | |
865 | - TPIDR_EL0: Software thread ID register. */ | |
866 | ||
867 | enum aarch64_system_control_registers | |
868 | { | |
869 | /* op0 op1 crn crm op2 */ | |
870 | NZCV = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x2 << 3) | 0x0, | |
871 | FPSR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x1, | |
872 | FPCR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x0, | |
873 | TPIDR_EL0 = (0x1 << 14) | (0x3 << 11) | (0xd << 7) | (0x0 << 3) | 0x2 | |
874 | }; | |
875 | ||
bb903df0 PL |
876 | /* Write a BLR instruction into *BUF. |
877 | ||
878 | BLR rn | |
879 | ||
880 | RN is the register to branch to. */ | |
881 | ||
882 | static int | |
883 | emit_blr (uint32_t *buf, struct aarch64_register rn) | |
884 | { | |
e1c587c3 | 885 | return aarch64_emit_insn (buf, BLR | ENCODE (rn.num, 5, 5)); |
bb903df0 PL |
886 | } |
887 | ||
afbe19f8 | 888 | /* Write a RET instruction into *BUF. |
bb903df0 | 889 | |
afbe19f8 | 890 | RET xn |
bb903df0 | 891 | |
afbe19f8 | 892 | RN is the register to branch to. */ |
bb903df0 PL |
893 | |
894 | static int | |
afbe19f8 PL |
895 | emit_ret (uint32_t *buf, struct aarch64_register rn) |
896 | { | |
e1c587c3 | 897 | return aarch64_emit_insn (buf, RET | ENCODE (rn.num, 5, 5)); |
afbe19f8 PL |
898 | } |
899 | ||
900 | static int | |
901 | emit_load_store_pair (uint32_t *buf, enum aarch64_opcodes opcode, | |
902 | struct aarch64_register rt, | |
903 | struct aarch64_register rt2, | |
904 | struct aarch64_register rn, | |
905 | struct aarch64_memory_operand operand) | |
bb903df0 PL |
906 | { |
907 | uint32_t opc; | |
908 | uint32_t pre_index; | |
909 | uint32_t write_back; | |
910 | ||
911 | if (rt.is64) | |
912 | opc = ENCODE (2, 2, 30); | |
913 | else | |
914 | opc = ENCODE (0, 2, 30); | |
915 | ||
916 | switch (operand.type) | |
917 | { | |
918 | case MEMORY_OPERAND_OFFSET: | |
919 | { | |
920 | pre_index = ENCODE (1, 1, 24); | |
921 | write_back = ENCODE (0, 1, 23); | |
922 | break; | |
923 | } | |
afbe19f8 PL |
924 | case MEMORY_OPERAND_POSTINDEX: |
925 | { | |
926 | pre_index = ENCODE (0, 1, 24); | |
927 | write_back = ENCODE (1, 1, 23); | |
928 | break; | |
929 | } | |
bb903df0 PL |
930 | case MEMORY_OPERAND_PREINDEX: |
931 | { | |
932 | pre_index = ENCODE (1, 1, 24); | |
933 | write_back = ENCODE (1, 1, 23); | |
934 | break; | |
935 | } | |
936 | default: | |
937 | return 0; | |
938 | } | |
939 | ||
e1c587c3 YQ |
940 | return aarch64_emit_insn (buf, opcode | opc | pre_index | write_back |
941 | | ENCODE (operand.index >> 3, 7, 15) | |
942 | | ENCODE (rt2.num, 5, 10) | |
943 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
944 | } |
945 | ||
afbe19f8 PL |
946 | /* Write a STP instruction into *BUF. |
947 | ||
948 | STP rt, rt2, [rn, #offset] | |
949 | STP rt, rt2, [rn, #index]! | |
950 | STP rt, rt2, [rn], #index | |
951 | ||
952 | RT and RT2 are the registers to store. | |
953 | RN is the base address register. | |
954 | OFFSET is the immediate to add to the base address. It is limited to a | |
955 | -512 .. 504 range (7 bits << 3). */ | |
956 | ||
957 | static int | |
958 | emit_stp (uint32_t *buf, struct aarch64_register rt, | |
959 | struct aarch64_register rt2, struct aarch64_register rn, | |
960 | struct aarch64_memory_operand operand) | |
961 | { | |
962 | return emit_load_store_pair (buf, STP, rt, rt2, rn, operand); | |
963 | } | |
964 | ||
965 | /* Write a LDP instruction into *BUF. | |
966 | ||
967 | LDP rt, rt2, [rn, #offset] | |
968 | LDP rt, rt2, [rn, #index]! | |
969 | LDP rt, rt2, [rn], #index | |
970 | ||
971 | RT and RT2 are the registers to store. | |
972 | RN is the base address register. | |
973 | OFFSET is the immediate to add to the base address. It is limited to a | |
974 | -512 .. 504 range (7 bits << 3). */ | |
975 | ||
976 | static int | |
977 | emit_ldp (uint32_t *buf, struct aarch64_register rt, | |
978 | struct aarch64_register rt2, struct aarch64_register rn, | |
979 | struct aarch64_memory_operand operand) | |
980 | { | |
981 | return emit_load_store_pair (buf, LDP, rt, rt2, rn, operand); | |
982 | } | |
983 | ||
bb903df0 PL |
984 | /* Write a LDP (SIMD&VFP) instruction using Q registers into *BUF. |
985 | ||
986 | LDP qt, qt2, [rn, #offset] | |
987 | ||
988 | RT and RT2 are the Q registers to store. | |
989 | RN is the base address register. | |
990 | OFFSET is the immediate to add to the base address. It is limited to | |
991 | -1024 .. 1008 range (7 bits << 4). */ | |
992 | ||
993 | static int | |
994 | emit_ldp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
995 | struct aarch64_register rn, int32_t offset) | |
996 | { | |
997 | uint32_t opc = ENCODE (2, 2, 30); | |
998 | uint32_t pre_index = ENCODE (1, 1, 24); | |
999 | ||
e1c587c3 YQ |
1000 | return aarch64_emit_insn (buf, LDP_SIMD_VFP | opc | pre_index |
1001 | | ENCODE (offset >> 4, 7, 15) | |
1002 | | ENCODE (rt2, 5, 10) | |
1003 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1004 | } |
1005 | ||
1006 | /* Write a STP (SIMD&VFP) instruction using Q registers into *BUF. | |
1007 | ||
1008 | STP qt, qt2, [rn, #offset] | |
1009 | ||
1010 | RT and RT2 are the Q registers to store. | |
1011 | RN is the base address register. | |
1012 | OFFSET is the immediate to add to the base address. It is limited to | |
1013 | -1024 .. 1008 range (7 bits << 4). */ | |
1014 | ||
1015 | static int | |
1016 | emit_stp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
1017 | struct aarch64_register rn, int32_t offset) | |
1018 | { | |
1019 | uint32_t opc = ENCODE (2, 2, 30); | |
1020 | uint32_t pre_index = ENCODE (1, 1, 24); | |
1021 | ||
e1c587c3 | 1022 | return aarch64_emit_insn (buf, STP_SIMD_VFP | opc | pre_index |
b6542f81 YQ |
1023 | | ENCODE (offset >> 4, 7, 15) |
1024 | | ENCODE (rt2, 5, 10) | |
1025 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1026 | } |
1027 | ||
afbe19f8 PL |
1028 | /* Write a LDRH instruction into *BUF. |
1029 | ||
1030 | LDRH wt, [xn, #offset] | |
1031 | LDRH wt, [xn, #index]! | |
1032 | LDRH wt, [xn], #index | |
1033 | ||
1034 | RT is the register to store. | |
1035 | RN is the base address register. | |
1036 | OFFSET is the immediate to add to the base address. It is limited to | |
1037 | 0 .. 32760 range (12 bits << 3). */ | |
1038 | ||
1039 | static int | |
1040 | emit_ldrh (uint32_t *buf, struct aarch64_register rt, | |
1041 | struct aarch64_register rn, | |
1042 | struct aarch64_memory_operand operand) | |
1043 | { | |
1c2e1515 | 1044 | return aarch64_emit_load_store (buf, 1, LDR, rt, rn, operand); |
afbe19f8 PL |
1045 | } |
1046 | ||
1047 | /* Write a LDRB instruction into *BUF. | |
1048 | ||
1049 | LDRB wt, [xn, #offset] | |
1050 | LDRB wt, [xn, #index]! | |
1051 | LDRB wt, [xn], #index | |
1052 | ||
1053 | RT is the register to store. | |
1054 | RN is the base address register. | |
1055 | OFFSET is the immediate to add to the base address. It is limited to | |
1056 | 0 .. 32760 range (12 bits << 3). */ | |
1057 | ||
1058 | static int | |
1059 | emit_ldrb (uint32_t *buf, struct aarch64_register rt, | |
1060 | struct aarch64_register rn, | |
1061 | struct aarch64_memory_operand operand) | |
1062 | { | |
1c2e1515 | 1063 | return aarch64_emit_load_store (buf, 0, LDR, rt, rn, operand); |
afbe19f8 PL |
1064 | } |
1065 | ||
bb903df0 | 1066 | |
bb903df0 PL |
1067 | |
1068 | /* Write a STR instruction into *BUF. | |
1069 | ||
1070 | STR rt, [rn, #offset] | |
1071 | STR rt, [rn, #index]! | |
afbe19f8 | 1072 | STR rt, [rn], #index |
bb903df0 PL |
1073 | |
1074 | RT is the register to store. | |
1075 | RN is the base address register. | |
1076 | OFFSET is the immediate to add to the base address. It is limited to | |
1077 | 0 .. 32760 range (12 bits << 3). */ | |
1078 | ||
1079 | static int | |
1080 | emit_str (uint32_t *buf, struct aarch64_register rt, | |
1081 | struct aarch64_register rn, | |
1082 | struct aarch64_memory_operand operand) | |
1083 | { | |
1c2e1515 | 1084 | return aarch64_emit_load_store (buf, rt.is64 ? 3 : 2, STR, rt, rn, operand); |
bb903df0 PL |
1085 | } |
1086 | ||
1087 | /* Helper function emitting an exclusive load or store instruction. */ | |
1088 | ||
1089 | static int | |
1090 | emit_load_store_exclusive (uint32_t *buf, uint32_t size, | |
1091 | enum aarch64_opcodes opcode, | |
1092 | struct aarch64_register rs, | |
1093 | struct aarch64_register rt, | |
1094 | struct aarch64_register rt2, | |
1095 | struct aarch64_register rn) | |
1096 | { | |
e1c587c3 YQ |
1097 | return aarch64_emit_insn (buf, opcode | ENCODE (size, 2, 30) |
1098 | | ENCODE (rs.num, 5, 16) | ENCODE (rt2.num, 5, 10) | |
1099 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1100 | } |
1101 | ||
1102 | /* Write a LAXR instruction into *BUF. | |
1103 | ||
1104 | LDAXR rt, [xn] | |
1105 | ||
1106 | RT is the destination register. | |
1107 | RN is the base address register. */ | |
1108 | ||
1109 | static int | |
1110 | emit_ldaxr (uint32_t *buf, struct aarch64_register rt, | |
1111 | struct aarch64_register rn) | |
1112 | { | |
1113 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, LDAXR, xzr, rt, | |
1114 | xzr, rn); | |
1115 | } | |
1116 | ||
1117 | /* Write a STXR instruction into *BUF. | |
1118 | ||
1119 | STXR ws, rt, [xn] | |
1120 | ||
1121 | RS is the result register, it indicates if the store succeeded or not. | |
1122 | RT is the destination register. | |
1123 | RN is the base address register. */ | |
1124 | ||
1125 | static int | |
1126 | emit_stxr (uint32_t *buf, struct aarch64_register rs, | |
1127 | struct aarch64_register rt, struct aarch64_register rn) | |
1128 | { | |
1129 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STXR, rs, rt, | |
1130 | xzr, rn); | |
1131 | } | |
1132 | ||
1133 | /* Write a STLR instruction into *BUF. | |
1134 | ||
1135 | STLR rt, [xn] | |
1136 | ||
1137 | RT is the register to store. | |
1138 | RN is the base address register. */ | |
1139 | ||
1140 | static int | |
1141 | emit_stlr (uint32_t *buf, struct aarch64_register rt, | |
1142 | struct aarch64_register rn) | |
1143 | { | |
1144 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STLR, xzr, rt, | |
1145 | xzr, rn); | |
1146 | } | |
1147 | ||
1148 | /* Helper function for data processing instructions with register sources. */ | |
1149 | ||
1150 | static int | |
231c0592 | 1151 | emit_data_processing_reg (uint32_t *buf, uint32_t opcode, |
bb903df0 PL |
1152 | struct aarch64_register rd, |
1153 | struct aarch64_register rn, | |
1154 | struct aarch64_register rm) | |
1155 | { | |
1156 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1157 | ||
e1c587c3 YQ |
1158 | return aarch64_emit_insn (buf, opcode | size | ENCODE (rm.num, 5, 16) |
1159 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1160 | } |
1161 | ||
1162 | /* Helper function for data processing instructions taking either a register | |
1163 | or an immediate. */ | |
1164 | ||
1165 | static int | |
1166 | emit_data_processing (uint32_t *buf, enum aarch64_opcodes opcode, | |
1167 | struct aarch64_register rd, | |
1168 | struct aarch64_register rn, | |
1169 | struct aarch64_operand operand) | |
1170 | { | |
1171 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1172 | /* The opcode is different for register and immediate source operands. */ | |
1173 | uint32_t operand_opcode; | |
1174 | ||
1175 | if (operand.type == OPERAND_IMMEDIATE) | |
1176 | { | |
1177 | /* xxx1 000x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1178 | operand_opcode = ENCODE (8, 4, 25); | |
1179 | ||
e1c587c3 YQ |
1180 | return aarch64_emit_insn (buf, opcode | operand_opcode | size |
1181 | | ENCODE (operand.imm, 12, 10) | |
1182 | | ENCODE (rn.num, 5, 5) | |
1183 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1184 | } |
1185 | else | |
1186 | { | |
1187 | /* xxx0 101x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1188 | operand_opcode = ENCODE (5, 4, 25); | |
1189 | ||
1190 | return emit_data_processing_reg (buf, opcode | operand_opcode, rd, | |
1191 | rn, operand.reg); | |
1192 | } | |
1193 | } | |
1194 | ||
1195 | /* Write an ADD instruction into *BUF. | |
1196 | ||
1197 | ADD rd, rn, #imm | |
1198 | ADD rd, rn, rm | |
1199 | ||
1200 | This function handles both an immediate and register add. | |
1201 | ||
1202 | RD is the destination register. | |
1203 | RN is the input register. | |
1204 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1205 | OPERAND_REGISTER. */ | |
1206 | ||
1207 | static int | |
1208 | emit_add (uint32_t *buf, struct aarch64_register rd, | |
1209 | struct aarch64_register rn, struct aarch64_operand operand) | |
1210 | { | |
1211 | return emit_data_processing (buf, ADD, rd, rn, operand); | |
1212 | } | |
1213 | ||
1214 | /* Write a SUB instruction into *BUF. | |
1215 | ||
1216 | SUB rd, rn, #imm | |
1217 | SUB rd, rn, rm | |
1218 | ||
1219 | This function handles both an immediate and register sub. | |
1220 | ||
1221 | RD is the destination register. | |
1222 | RN is the input register. | |
1223 | IMM is the immediate to substract to RN. */ | |
1224 | ||
1225 | static int | |
1226 | emit_sub (uint32_t *buf, struct aarch64_register rd, | |
1227 | struct aarch64_register rn, struct aarch64_operand operand) | |
1228 | { | |
1229 | return emit_data_processing (buf, SUB, rd, rn, operand); | |
1230 | } | |
1231 | ||
1232 | /* Write a MOV instruction into *BUF. | |
1233 | ||
1234 | MOV rd, #imm | |
1235 | MOV rd, rm | |
1236 | ||
1237 | This function handles both a wide immediate move and a register move, | |
1238 | with the condition that the source register is not xzr. xzr and the | |
1239 | stack pointer share the same encoding and this function only supports | |
1240 | the stack pointer. | |
1241 | ||
1242 | RD is the destination register. | |
1243 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1244 | OPERAND_REGISTER. */ | |
1245 | ||
1246 | static int | |
1247 | emit_mov (uint32_t *buf, struct aarch64_register rd, | |
1248 | struct aarch64_operand operand) | |
1249 | { | |
1250 | if (operand.type == OPERAND_IMMEDIATE) | |
1251 | { | |
1252 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1253 | /* Do not shift the immediate. */ | |
1254 | uint32_t shift = ENCODE (0, 2, 21); | |
1255 | ||
e1c587c3 YQ |
1256 | return aarch64_emit_insn (buf, MOV | size | shift |
1257 | | ENCODE (operand.imm, 16, 5) | |
1258 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1259 | } |
1260 | else | |
1261 | return emit_add (buf, rd, operand.reg, immediate_operand (0)); | |
1262 | } | |
1263 | ||
1264 | /* Write a MOVK instruction into *BUF. | |
1265 | ||
1266 | MOVK rd, #imm, lsl #shift | |
1267 | ||
1268 | RD is the destination register. | |
1269 | IMM is the immediate. | |
1270 | SHIFT is the logical shift left to apply to IMM. */ | |
1271 | ||
1272 | static int | |
7781c06f YQ |
1273 | emit_movk (uint32_t *buf, struct aarch64_register rd, uint32_t imm, |
1274 | unsigned shift) | |
bb903df0 PL |
1275 | { |
1276 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1277 | ||
e1c587c3 YQ |
1278 | return aarch64_emit_insn (buf, MOVK | size | ENCODE (shift, 2, 21) | |
1279 | ENCODE (imm, 16, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1280 | } |
1281 | ||
1282 | /* Write instructions into *BUF in order to move ADDR into a register. | |
1283 | ADDR can be a 64-bit value. | |
1284 | ||
1285 | This function will emit a series of MOV and MOVK instructions, such as: | |
1286 | ||
1287 | MOV xd, #(addr) | |
1288 | MOVK xd, #(addr >> 16), lsl #16 | |
1289 | MOVK xd, #(addr >> 32), lsl #32 | |
1290 | MOVK xd, #(addr >> 48), lsl #48 */ | |
1291 | ||
1292 | static int | |
1293 | emit_mov_addr (uint32_t *buf, struct aarch64_register rd, CORE_ADDR addr) | |
1294 | { | |
1295 | uint32_t *p = buf; | |
1296 | ||
1297 | /* The MOV (wide immediate) instruction clears to top bits of the | |
1298 | register. */ | |
1299 | p += emit_mov (p, rd, immediate_operand (addr & 0xffff)); | |
1300 | ||
1301 | if ((addr >> 16) != 0) | |
1302 | p += emit_movk (p, rd, (addr >> 16) & 0xffff, 1); | |
1303 | else | |
1304 | return p - buf; | |
1305 | ||
1306 | if ((addr >> 32) != 0) | |
1307 | p += emit_movk (p, rd, (addr >> 32) & 0xffff, 2); | |
1308 | else | |
1309 | return p - buf; | |
1310 | ||
1311 | if ((addr >> 48) != 0) | |
1312 | p += emit_movk (p, rd, (addr >> 48) & 0xffff, 3); | |
1313 | ||
1314 | return p - buf; | |
1315 | } | |
1316 | ||
afbe19f8 PL |
1317 | /* Write a SUBS instruction into *BUF. |
1318 | ||
1319 | SUBS rd, rn, rm | |
1320 | ||
1321 | This instruction update the condition flags. | |
1322 | ||
1323 | RD is the destination register. | |
1324 | RN and RM are the source registers. */ | |
1325 | ||
1326 | static int | |
1327 | emit_subs (uint32_t *buf, struct aarch64_register rd, | |
1328 | struct aarch64_register rn, struct aarch64_operand operand) | |
1329 | { | |
1330 | return emit_data_processing (buf, SUBS, rd, rn, operand); | |
1331 | } | |
1332 | ||
1333 | /* Write a CMP instruction into *BUF. | |
1334 | ||
1335 | CMP rn, rm | |
1336 | ||
1337 | This instruction is an alias of SUBS xzr, rn, rm. | |
1338 | ||
1339 | RN and RM are the registers to compare. */ | |
1340 | ||
1341 | static int | |
1342 | emit_cmp (uint32_t *buf, struct aarch64_register rn, | |
1343 | struct aarch64_operand operand) | |
1344 | { | |
1345 | return emit_subs (buf, xzr, rn, operand); | |
1346 | } | |
1347 | ||
1348 | /* Write a AND instruction into *BUF. | |
1349 | ||
1350 | AND rd, rn, rm | |
1351 | ||
1352 | RD is the destination register. | |
1353 | RN and RM are the source registers. */ | |
1354 | ||
1355 | static int | |
1356 | emit_and (uint32_t *buf, struct aarch64_register rd, | |
1357 | struct aarch64_register rn, struct aarch64_register rm) | |
1358 | { | |
1359 | return emit_data_processing_reg (buf, AND, rd, rn, rm); | |
1360 | } | |
1361 | ||
1362 | /* Write a ORR instruction into *BUF. | |
1363 | ||
1364 | ORR rd, rn, rm | |
1365 | ||
1366 | RD is the destination register. | |
1367 | RN and RM are the source registers. */ | |
1368 | ||
1369 | static int | |
1370 | emit_orr (uint32_t *buf, struct aarch64_register rd, | |
1371 | struct aarch64_register rn, struct aarch64_register rm) | |
1372 | { | |
1373 | return emit_data_processing_reg (buf, ORR, rd, rn, rm); | |
1374 | } | |
1375 | ||
1376 | /* Write a ORN instruction into *BUF. | |
1377 | ||
1378 | ORN rd, rn, rm | |
1379 | ||
1380 | RD is the destination register. | |
1381 | RN and RM are the source registers. */ | |
1382 | ||
1383 | static int | |
1384 | emit_orn (uint32_t *buf, struct aarch64_register rd, | |
1385 | struct aarch64_register rn, struct aarch64_register rm) | |
1386 | { | |
1387 | return emit_data_processing_reg (buf, ORN, rd, rn, rm); | |
1388 | } | |
1389 | ||
1390 | /* Write a EOR instruction into *BUF. | |
1391 | ||
1392 | EOR rd, rn, rm | |
1393 | ||
1394 | RD is the destination register. | |
1395 | RN and RM are the source registers. */ | |
1396 | ||
1397 | static int | |
1398 | emit_eor (uint32_t *buf, struct aarch64_register rd, | |
1399 | struct aarch64_register rn, struct aarch64_register rm) | |
1400 | { | |
1401 | return emit_data_processing_reg (buf, EOR, rd, rn, rm); | |
1402 | } | |
1403 | ||
1404 | /* Write a MVN instruction into *BUF. | |
1405 | ||
1406 | MVN rd, rm | |
1407 | ||
1408 | This is an alias for ORN rd, xzr, rm. | |
1409 | ||
1410 | RD is the destination register. | |
1411 | RM is the source register. */ | |
1412 | ||
1413 | static int | |
1414 | emit_mvn (uint32_t *buf, struct aarch64_register rd, | |
1415 | struct aarch64_register rm) | |
1416 | { | |
1417 | return emit_orn (buf, rd, xzr, rm); | |
1418 | } | |
1419 | ||
1420 | /* Write a LSLV instruction into *BUF. | |
1421 | ||
1422 | LSLV rd, rn, rm | |
1423 | ||
1424 | RD is the destination register. | |
1425 | RN and RM are the source registers. */ | |
1426 | ||
1427 | static int | |
1428 | emit_lslv (uint32_t *buf, struct aarch64_register rd, | |
1429 | struct aarch64_register rn, struct aarch64_register rm) | |
1430 | { | |
1431 | return emit_data_processing_reg (buf, LSLV, rd, rn, rm); | |
1432 | } | |
1433 | ||
1434 | /* Write a LSRV instruction into *BUF. | |
1435 | ||
1436 | LSRV rd, rn, rm | |
1437 | ||
1438 | RD is the destination register. | |
1439 | RN and RM are the source registers. */ | |
1440 | ||
1441 | static int | |
1442 | emit_lsrv (uint32_t *buf, struct aarch64_register rd, | |
1443 | struct aarch64_register rn, struct aarch64_register rm) | |
1444 | { | |
1445 | return emit_data_processing_reg (buf, LSRV, rd, rn, rm); | |
1446 | } | |
1447 | ||
1448 | /* Write a ASRV instruction into *BUF. | |
1449 | ||
1450 | ASRV rd, rn, rm | |
1451 | ||
1452 | RD is the destination register. | |
1453 | RN and RM are the source registers. */ | |
1454 | ||
1455 | static int | |
1456 | emit_asrv (uint32_t *buf, struct aarch64_register rd, | |
1457 | struct aarch64_register rn, struct aarch64_register rm) | |
1458 | { | |
1459 | return emit_data_processing_reg (buf, ASRV, rd, rn, rm); | |
1460 | } | |
1461 | ||
1462 | /* Write a MUL instruction into *BUF. | |
1463 | ||
1464 | MUL rd, rn, rm | |
1465 | ||
1466 | RD is the destination register. | |
1467 | RN and RM are the source registers. */ | |
1468 | ||
1469 | static int | |
1470 | emit_mul (uint32_t *buf, struct aarch64_register rd, | |
1471 | struct aarch64_register rn, struct aarch64_register rm) | |
1472 | { | |
1473 | return emit_data_processing_reg (buf, MUL, rd, rn, rm); | |
1474 | } | |
1475 | ||
bb903df0 PL |
1476 | /* Write a MRS instruction into *BUF. The register size is 64-bit. |
1477 | ||
1478 | MRS xt, system_reg | |
1479 | ||
1480 | RT is the destination register. | |
1481 | SYSTEM_REG is special purpose register to read. */ | |
1482 | ||
1483 | static int | |
1484 | emit_mrs (uint32_t *buf, struct aarch64_register rt, | |
1485 | enum aarch64_system_control_registers system_reg) | |
1486 | { | |
e1c587c3 YQ |
1487 | return aarch64_emit_insn (buf, MRS | ENCODE (system_reg, 15, 5) |
1488 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1489 | } |
1490 | ||
1491 | /* Write a MSR instruction into *BUF. The register size is 64-bit. | |
1492 | ||
1493 | MSR system_reg, xt | |
1494 | ||
1495 | SYSTEM_REG is special purpose register to write. | |
1496 | RT is the input register. */ | |
1497 | ||
1498 | static int | |
1499 | emit_msr (uint32_t *buf, enum aarch64_system_control_registers system_reg, | |
1500 | struct aarch64_register rt) | |
1501 | { | |
e1c587c3 YQ |
1502 | return aarch64_emit_insn (buf, MSR | ENCODE (system_reg, 15, 5) |
1503 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1504 | } |
1505 | ||
1506 | /* Write a SEVL instruction into *BUF. | |
1507 | ||
1508 | This is a hint instruction telling the hardware to trigger an event. */ | |
1509 | ||
1510 | static int | |
1511 | emit_sevl (uint32_t *buf) | |
1512 | { | |
e1c587c3 | 1513 | return aarch64_emit_insn (buf, SEVL); |
bb903df0 PL |
1514 | } |
1515 | ||
1516 | /* Write a WFE instruction into *BUF. | |
1517 | ||
1518 | This is a hint instruction telling the hardware to wait for an event. */ | |
1519 | ||
1520 | static int | |
1521 | emit_wfe (uint32_t *buf) | |
1522 | { | |
e1c587c3 | 1523 | return aarch64_emit_insn (buf, WFE); |
bb903df0 PL |
1524 | } |
1525 | ||
afbe19f8 PL |
1526 | /* Write a SBFM instruction into *BUF. |
1527 | ||
1528 | SBFM rd, rn, #immr, #imms | |
1529 | ||
1530 | This instruction moves the bits from #immr to #imms into the | |
1531 | destination, sign extending the result. | |
1532 | ||
1533 | RD is the destination register. | |
1534 | RN is the source register. | |
1535 | IMMR is the bit number to start at (least significant bit). | |
1536 | IMMS is the bit number to stop at (most significant bit). */ | |
1537 | ||
1538 | static int | |
1539 | emit_sbfm (uint32_t *buf, struct aarch64_register rd, | |
1540 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1541 | { | |
1542 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1543 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1544 | ||
e1c587c3 YQ |
1545 | return aarch64_emit_insn (buf, SBFM | size | n | ENCODE (immr, 6, 16) |
1546 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1547 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1548 | } |
1549 | ||
1550 | /* Write a SBFX instruction into *BUF. | |
1551 | ||
1552 | SBFX rd, rn, #lsb, #width | |
1553 | ||
1554 | This instruction moves #width bits from #lsb into the destination, sign | |
1555 | extending the result. This is an alias for: | |
1556 | ||
1557 | SBFM rd, rn, #lsb, #(lsb + width - 1) | |
1558 | ||
1559 | RD is the destination register. | |
1560 | RN is the source register. | |
1561 | LSB is the bit number to start at (least significant bit). | |
1562 | WIDTH is the number of bits to move. */ | |
1563 | ||
1564 | static int | |
1565 | emit_sbfx (uint32_t *buf, struct aarch64_register rd, | |
1566 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1567 | { | |
1568 | return emit_sbfm (buf, rd, rn, lsb, lsb + width - 1); | |
1569 | } | |
1570 | ||
1571 | /* Write a UBFM instruction into *BUF. | |
1572 | ||
1573 | UBFM rd, rn, #immr, #imms | |
1574 | ||
1575 | This instruction moves the bits from #immr to #imms into the | |
1576 | destination, extending the result with zeros. | |
1577 | ||
1578 | RD is the destination register. | |
1579 | RN is the source register. | |
1580 | IMMR is the bit number to start at (least significant bit). | |
1581 | IMMS is the bit number to stop at (most significant bit). */ | |
1582 | ||
1583 | static int | |
1584 | emit_ubfm (uint32_t *buf, struct aarch64_register rd, | |
1585 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1586 | { | |
1587 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1588 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1589 | ||
e1c587c3 YQ |
1590 | return aarch64_emit_insn (buf, UBFM | size | n | ENCODE (immr, 6, 16) |
1591 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1592 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1593 | } |
1594 | ||
1595 | /* Write a UBFX instruction into *BUF. | |
1596 | ||
1597 | UBFX rd, rn, #lsb, #width | |
1598 | ||
1599 | This instruction moves #width bits from #lsb into the destination, | |
1600 | extending the result with zeros. This is an alias for: | |
1601 | ||
1602 | UBFM rd, rn, #lsb, #(lsb + width - 1) | |
1603 | ||
1604 | RD is the destination register. | |
1605 | RN is the source register. | |
1606 | LSB is the bit number to start at (least significant bit). | |
1607 | WIDTH is the number of bits to move. */ | |
1608 | ||
1609 | static int | |
1610 | emit_ubfx (uint32_t *buf, struct aarch64_register rd, | |
1611 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1612 | { | |
1613 | return emit_ubfm (buf, rd, rn, lsb, lsb + width - 1); | |
1614 | } | |
1615 | ||
1616 | /* Write a CSINC instruction into *BUF. | |
1617 | ||
1618 | CSINC rd, rn, rm, cond | |
1619 | ||
1620 | This instruction conditionally increments rn or rm and places the result | |
1621 | in rd. rn is chosen is the condition is true. | |
1622 | ||
1623 | RD is the destination register. | |
1624 | RN and RM are the source registers. | |
1625 | COND is the encoded condition. */ | |
1626 | ||
1627 | static int | |
1628 | emit_csinc (uint32_t *buf, struct aarch64_register rd, | |
1629 | struct aarch64_register rn, struct aarch64_register rm, | |
1630 | unsigned cond) | |
1631 | { | |
1632 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1633 | ||
e1c587c3 YQ |
1634 | return aarch64_emit_insn (buf, CSINC | size | ENCODE (rm.num, 5, 16) |
1635 | | ENCODE (cond, 4, 12) | ENCODE (rn.num, 5, 5) | |
1636 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1637 | } |
1638 | ||
1639 | /* Write a CSET instruction into *BUF. | |
1640 | ||
1641 | CSET rd, cond | |
1642 | ||
1643 | This instruction conditionally write 1 or 0 in the destination register. | |
1644 | 1 is written if the condition is true. This is an alias for: | |
1645 | ||
1646 | CSINC rd, xzr, xzr, !cond | |
1647 | ||
1648 | Note that the condition needs to be inverted. | |
1649 | ||
1650 | RD is the destination register. | |
1651 | RN and RM are the source registers. | |
1652 | COND is the encoded condition. */ | |
1653 | ||
1654 | static int | |
1655 | emit_cset (uint32_t *buf, struct aarch64_register rd, unsigned cond) | |
1656 | { | |
1657 | /* The least significant bit of the condition needs toggling in order to | |
1658 | invert it. */ | |
1659 | return emit_csinc (buf, rd, xzr, xzr, cond ^ 0x1); | |
1660 | } | |
1661 | ||
bb903df0 PL |
1662 | /* Write LEN instructions from BUF into the inferior memory at *TO. |
1663 | ||
1664 | Note instructions are always little endian on AArch64, unlike data. */ | |
1665 | ||
1666 | static void | |
1667 | append_insns (CORE_ADDR *to, size_t len, const uint32_t *buf) | |
1668 | { | |
1669 | size_t byte_len = len * sizeof (uint32_t); | |
1670 | #if (__BYTE_ORDER == __BIG_ENDIAN) | |
cb93dc7f | 1671 | uint32_t *le_buf = (uint32_t *) xmalloc (byte_len); |
bb903df0 PL |
1672 | size_t i; |
1673 | ||
1674 | for (i = 0; i < len; i++) | |
1675 | le_buf[i] = htole32 (buf[i]); | |
1676 | ||
4196ab2a | 1677 | target_write_memory (*to, (const unsigned char *) le_buf, byte_len); |
bb903df0 PL |
1678 | |
1679 | xfree (le_buf); | |
1680 | #else | |
4196ab2a | 1681 | target_write_memory (*to, (const unsigned char *) buf, byte_len); |
bb903df0 PL |
1682 | #endif |
1683 | ||
1684 | *to += byte_len; | |
1685 | } | |
1686 | ||
0badd99f YQ |
1687 | /* Sub-class of struct aarch64_insn_data, store information of |
1688 | instruction relocation for fast tracepoint. Visitor can | |
1689 | relocate an instruction from BASE.INSN_ADDR to NEW_ADDR and save | |
1690 | the relocated instructions in buffer pointed by INSN_PTR. */ | |
bb903df0 | 1691 | |
0badd99f YQ |
1692 | struct aarch64_insn_relocation_data |
1693 | { | |
1694 | struct aarch64_insn_data base; | |
1695 | ||
1696 | /* The new address the instruction is relocated to. */ | |
1697 | CORE_ADDR new_addr; | |
1698 | /* Pointer to the buffer of relocated instruction(s). */ | |
1699 | uint32_t *insn_ptr; | |
1700 | }; | |
1701 | ||
1702 | /* Implementation of aarch64_insn_visitor method "b". */ | |
1703 | ||
1704 | static void | |
1705 | aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset, | |
1706 | struct aarch64_insn_data *data) | |
1707 | { | |
1708 | struct aarch64_insn_relocation_data *insn_reloc | |
1709 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1710 | int64_t new_offset |
0badd99f YQ |
1711 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1712 | ||
1713 | if (can_encode_int32 (new_offset, 28)) | |
1714 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, is_bl, new_offset); | |
1715 | } | |
1716 | ||
1717 | /* Implementation of aarch64_insn_visitor method "b_cond". */ | |
1718 | ||
1719 | static void | |
1720 | aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset, | |
1721 | struct aarch64_insn_data *data) | |
1722 | { | |
1723 | struct aarch64_insn_relocation_data *insn_reloc | |
1724 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1725 | int64_t new_offset |
0badd99f YQ |
1726 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1727 | ||
1728 | if (can_encode_int32 (new_offset, 21)) | |
1729 | { | |
1730 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, | |
1731 | new_offset); | |
bb903df0 | 1732 | } |
0badd99f | 1733 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1734 | { |
0badd99f YQ |
1735 | /* The offset is out of range for a conditional branch |
1736 | instruction but not for a unconditional branch. We can use | |
1737 | the following instructions instead: | |
bb903df0 | 1738 | |
0badd99f YQ |
1739 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
1740 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1741 | TAKEN: | |
1742 | B #(offset - 8) | |
1743 | NOT_TAKEN: | |
1744 | ||
1745 | */ | |
1746 | ||
1747 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, 8); | |
1748 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1749 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
bb903df0 | 1750 | } |
0badd99f | 1751 | } |
bb903df0 | 1752 | |
0badd99f YQ |
1753 | /* Implementation of aarch64_insn_visitor method "cb". */ |
1754 | ||
1755 | static void | |
1756 | aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz, | |
1757 | const unsigned rn, int is64, | |
1758 | struct aarch64_insn_data *data) | |
1759 | { | |
1760 | struct aarch64_insn_relocation_data *insn_reloc | |
1761 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1762 | int64_t new_offset |
0badd99f YQ |
1763 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1764 | ||
1765 | if (can_encode_int32 (new_offset, 21)) | |
1766 | { | |
1767 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1768 | aarch64_register (rn, is64), new_offset); | |
bb903df0 | 1769 | } |
0badd99f | 1770 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1771 | { |
0badd99f YQ |
1772 | /* The offset is out of range for a compare and branch |
1773 | instruction but not for a unconditional branch. We can use | |
1774 | the following instructions instead: | |
1775 | ||
1776 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. | |
1777 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1778 | TAKEN: | |
1779 | B #(offset - 8) | |
1780 | NOT_TAKEN: | |
1781 | ||
1782 | */ | |
1783 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1784 | aarch64_register (rn, is64), 8); | |
1785 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1786 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
1787 | } | |
1788 | } | |
bb903df0 | 1789 | |
0badd99f | 1790 | /* Implementation of aarch64_insn_visitor method "tb". */ |
bb903df0 | 1791 | |
0badd99f YQ |
1792 | static void |
1793 | aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz, | |
1794 | const unsigned rt, unsigned bit, | |
1795 | struct aarch64_insn_data *data) | |
1796 | { | |
1797 | struct aarch64_insn_relocation_data *insn_reloc | |
1798 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1799 | int64_t new_offset |
0badd99f YQ |
1800 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1801 | ||
1802 | if (can_encode_int32 (new_offset, 16)) | |
1803 | { | |
1804 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1805 | aarch64_register (rt, 1), new_offset); | |
bb903df0 | 1806 | } |
0badd99f | 1807 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1808 | { |
0badd99f YQ |
1809 | /* The offset is out of range for a test bit and branch |
1810 | instruction but not for a unconditional branch. We can use | |
1811 | the following instructions instead: | |
1812 | ||
1813 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. | |
1814 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1815 | TAKEN: | |
1816 | B #(offset - 8) | |
1817 | NOT_TAKEN: | |
1818 | ||
1819 | */ | |
1820 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1821 | aarch64_register (rt, 1), 8); | |
1822 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1823 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, | |
1824 | new_offset - 8); | |
1825 | } | |
1826 | } | |
bb903df0 | 1827 | |
0badd99f | 1828 | /* Implementation of aarch64_insn_visitor method "adr". */ |
bb903df0 | 1829 | |
0badd99f YQ |
1830 | static void |
1831 | aarch64_ftrace_insn_reloc_adr (const int32_t offset, const unsigned rd, | |
1832 | const int is_adrp, | |
1833 | struct aarch64_insn_data *data) | |
1834 | { | |
1835 | struct aarch64_insn_relocation_data *insn_reloc | |
1836 | = (struct aarch64_insn_relocation_data *) data; | |
1837 | /* We know exactly the address the ADR{P,} instruction will compute. | |
1838 | We can just write it to the destination register. */ | |
1839 | CORE_ADDR address = data->insn_addr + offset; | |
bb903df0 | 1840 | |
0badd99f YQ |
1841 | if (is_adrp) |
1842 | { | |
1843 | /* Clear the lower 12 bits of the offset to get the 4K page. */ | |
1844 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1845 | aarch64_register (rd, 1), | |
1846 | address & ~0xfff); | |
1847 | } | |
1848 | else | |
1849 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1850 | aarch64_register (rd, 1), address); | |
1851 | } | |
bb903df0 | 1852 | |
0badd99f | 1853 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
bb903df0 | 1854 | |
0badd99f YQ |
1855 | static void |
1856 | aarch64_ftrace_insn_reloc_ldr_literal (const int32_t offset, const int is_sw, | |
1857 | const unsigned rt, const int is64, | |
1858 | struct aarch64_insn_data *data) | |
1859 | { | |
1860 | struct aarch64_insn_relocation_data *insn_reloc | |
1861 | = (struct aarch64_insn_relocation_data *) data; | |
1862 | CORE_ADDR address = data->insn_addr + offset; | |
1863 | ||
1864 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1865 | aarch64_register (rt, 1), address); | |
1866 | ||
1867 | /* We know exactly what address to load from, and what register we | |
1868 | can use: | |
1869 | ||
1870 | MOV xd, #(oldloc + offset) | |
1871 | MOVK xd, #((oldloc + offset) >> 16), lsl #16 | |
1872 | ... | |
1873 | ||
1874 | LDR xd, [xd] ; or LDRSW xd, [xd] | |
1875 | ||
1876 | */ | |
1877 | ||
1878 | if (is_sw) | |
1879 | insn_reloc->insn_ptr += emit_ldrsw (insn_reloc->insn_ptr, | |
1880 | aarch64_register (rt, 1), | |
1881 | aarch64_register (rt, 1), | |
1882 | offset_memory_operand (0)); | |
bb903df0 | 1883 | else |
0badd99f YQ |
1884 | insn_reloc->insn_ptr += emit_ldr (insn_reloc->insn_ptr, |
1885 | aarch64_register (rt, is64), | |
1886 | aarch64_register (rt, 1), | |
1887 | offset_memory_operand (0)); | |
1888 | } | |
1889 | ||
1890 | /* Implementation of aarch64_insn_visitor method "others". */ | |
1891 | ||
1892 | static void | |
1893 | aarch64_ftrace_insn_reloc_others (const uint32_t insn, | |
1894 | struct aarch64_insn_data *data) | |
1895 | { | |
1896 | struct aarch64_insn_relocation_data *insn_reloc | |
1897 | = (struct aarch64_insn_relocation_data *) data; | |
bb903df0 | 1898 | |
0badd99f YQ |
1899 | /* The instruction is not PC relative. Just re-emit it at the new |
1900 | location. */ | |
e1c587c3 | 1901 | insn_reloc->insn_ptr += aarch64_emit_insn (insn_reloc->insn_ptr, insn); |
0badd99f YQ |
1902 | } |
1903 | ||
1904 | static const struct aarch64_insn_visitor visitor = | |
1905 | { | |
1906 | aarch64_ftrace_insn_reloc_b, | |
1907 | aarch64_ftrace_insn_reloc_b_cond, | |
1908 | aarch64_ftrace_insn_reloc_cb, | |
1909 | aarch64_ftrace_insn_reloc_tb, | |
1910 | aarch64_ftrace_insn_reloc_adr, | |
1911 | aarch64_ftrace_insn_reloc_ldr_literal, | |
1912 | aarch64_ftrace_insn_reloc_others, | |
1913 | }; | |
1914 | ||
bb903df0 PL |
1915 | /* Implementation of linux_target_ops method |
1916 | "install_fast_tracepoint_jump_pad". */ | |
1917 | ||
1918 | static int | |
1919 | aarch64_install_fast_tracepoint_jump_pad (CORE_ADDR tpoint, | |
1920 | CORE_ADDR tpaddr, | |
1921 | CORE_ADDR collector, | |
1922 | CORE_ADDR lockaddr, | |
1923 | ULONGEST orig_size, | |
1924 | CORE_ADDR *jump_entry, | |
1925 | CORE_ADDR *trampoline, | |
1926 | ULONGEST *trampoline_size, | |
1927 | unsigned char *jjump_pad_insn, | |
1928 | ULONGEST *jjump_pad_insn_size, | |
1929 | CORE_ADDR *adjusted_insn_addr, | |
1930 | CORE_ADDR *adjusted_insn_addr_end, | |
1931 | char *err) | |
1932 | { | |
1933 | uint32_t buf[256]; | |
1934 | uint32_t *p = buf; | |
2ac09a5b | 1935 | int64_t offset; |
bb903df0 | 1936 | int i; |
70b439f0 | 1937 | uint32_t insn; |
bb903df0 | 1938 | CORE_ADDR buildaddr = *jump_entry; |
0badd99f | 1939 | struct aarch64_insn_relocation_data insn_data; |
bb903df0 PL |
1940 | |
1941 | /* We need to save the current state on the stack both to restore it | |
1942 | later and to collect register values when the tracepoint is hit. | |
1943 | ||
1944 | The saved registers are pushed in a layout that needs to be in sync | |
1945 | with aarch64_ft_collect_regmap (see linux-aarch64-ipa.c). Later on | |
1946 | the supply_fast_tracepoint_registers function will fill in the | |
1947 | register cache from a pointer to saved registers on the stack we build | |
1948 | here. | |
1949 | ||
1950 | For simplicity, we set the size of each cell on the stack to 16 bytes. | |
1951 | This way one cell can hold any register type, from system registers | |
1952 | to the 128 bit SIMD&FP registers. Furthermore, the stack pointer | |
1953 | has to be 16 bytes aligned anyway. | |
1954 | ||
1955 | Note that the CPSR register does not exist on AArch64. Instead we | |
1956 | can access system bits describing the process state with the | |
1957 | MRS/MSR instructions, namely the condition flags. We save them as | |
1958 | if they are part of a CPSR register because that's how GDB | |
1959 | interprets these system bits. At the moment, only the condition | |
1960 | flags are saved in CPSR (NZCV). | |
1961 | ||
1962 | Stack layout, each cell is 16 bytes (descending): | |
1963 | ||
1964 | High *-------- SIMD&FP registers from 31 down to 0. --------* | |
1965 | | q31 | | |
1966 | . . | |
1967 | . . 32 cells | |
1968 | . . | |
1969 | | q0 | | |
1970 | *---- General purpose registers from 30 down to 0. ----* | |
1971 | | x30 | | |
1972 | . . | |
1973 | . . 31 cells | |
1974 | . . | |
1975 | | x0 | | |
1976 | *------------- Special purpose registers. -------------* | |
1977 | | SP | | |
1978 | | PC | | |
1979 | | CPSR (NZCV) | 5 cells | |
1980 | | FPSR | | |
1981 | | FPCR | <- SP + 16 | |
1982 | *------------- collecting_t object --------------------* | |
1983 | | TPIDR_EL0 | struct tracepoint * | | |
1984 | Low *------------------------------------------------------* | |
1985 | ||
1986 | After this stack is set up, we issue a call to the collector, passing | |
1987 | it the saved registers at (SP + 16). */ | |
1988 | ||
1989 | /* Push SIMD&FP registers on the stack: | |
1990 | ||
1991 | SUB sp, sp, #(32 * 16) | |
1992 | ||
1993 | STP q30, q31, [sp, #(30 * 16)] | |
1994 | ... | |
1995 | STP q0, q1, [sp] | |
1996 | ||
1997 | */ | |
1998 | p += emit_sub (p, sp, sp, immediate_operand (32 * 16)); | |
1999 | for (i = 30; i >= 0; i -= 2) | |
2000 | p += emit_stp_q_offset (p, i, i + 1, sp, i * 16); | |
2001 | ||
30baf67b | 2002 | /* Push general purpose registers on the stack. Note that we do not need |
bb903df0 PL |
2003 | to push x31 as it represents the xzr register and not the stack |
2004 | pointer in a STR instruction. | |
2005 | ||
2006 | SUB sp, sp, #(31 * 16) | |
2007 | ||
2008 | STR x30, [sp, #(30 * 16)] | |
2009 | ... | |
2010 | STR x0, [sp] | |
2011 | ||
2012 | */ | |
2013 | p += emit_sub (p, sp, sp, immediate_operand (31 * 16)); | |
2014 | for (i = 30; i >= 0; i -= 1) | |
2015 | p += emit_str (p, aarch64_register (i, 1), sp, | |
2016 | offset_memory_operand (i * 16)); | |
2017 | ||
2018 | /* Make space for 5 more cells. | |
2019 | ||
2020 | SUB sp, sp, #(5 * 16) | |
2021 | ||
2022 | */ | |
2023 | p += emit_sub (p, sp, sp, immediate_operand (5 * 16)); | |
2024 | ||
2025 | ||
2026 | /* Save SP: | |
2027 | ||
2028 | ADD x4, sp, #((32 + 31 + 5) * 16) | |
2029 | STR x4, [sp, #(4 * 16)] | |
2030 | ||
2031 | */ | |
2032 | p += emit_add (p, x4, sp, immediate_operand ((32 + 31 + 5) * 16)); | |
2033 | p += emit_str (p, x4, sp, offset_memory_operand (4 * 16)); | |
2034 | ||
2035 | /* Save PC (tracepoint address): | |
2036 | ||
2037 | MOV x3, #(tpaddr) | |
2038 | ... | |
2039 | ||
2040 | STR x3, [sp, #(3 * 16)] | |
2041 | ||
2042 | */ | |
2043 | ||
2044 | p += emit_mov_addr (p, x3, tpaddr); | |
2045 | p += emit_str (p, x3, sp, offset_memory_operand (3 * 16)); | |
2046 | ||
2047 | /* Save CPSR (NZCV), FPSR and FPCR: | |
2048 | ||
2049 | MRS x2, nzcv | |
2050 | MRS x1, fpsr | |
2051 | MRS x0, fpcr | |
2052 | ||
2053 | STR x2, [sp, #(2 * 16)] | |
2054 | STR x1, [sp, #(1 * 16)] | |
2055 | STR x0, [sp, #(0 * 16)] | |
2056 | ||
2057 | */ | |
2058 | p += emit_mrs (p, x2, NZCV); | |
2059 | p += emit_mrs (p, x1, FPSR); | |
2060 | p += emit_mrs (p, x0, FPCR); | |
2061 | p += emit_str (p, x2, sp, offset_memory_operand (2 * 16)); | |
2062 | p += emit_str (p, x1, sp, offset_memory_operand (1 * 16)); | |
2063 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2064 | ||
2065 | /* Push the collecting_t object. It consist of the address of the | |
2066 | tracepoint and an ID for the current thread. We get the latter by | |
2067 | reading the tpidr_el0 system register. It corresponds to the | |
2068 | NT_ARM_TLS register accessible with ptrace. | |
2069 | ||
2070 | MOV x0, #(tpoint) | |
2071 | ... | |
2072 | ||
2073 | MRS x1, tpidr_el0 | |
2074 | ||
2075 | STP x0, x1, [sp, #-16]! | |
2076 | ||
2077 | */ | |
2078 | ||
2079 | p += emit_mov_addr (p, x0, tpoint); | |
2080 | p += emit_mrs (p, x1, TPIDR_EL0); | |
2081 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-16)); | |
2082 | ||
2083 | /* Spin-lock: | |
2084 | ||
2085 | The shared memory for the lock is at lockaddr. It will hold zero | |
2086 | if no-one is holding the lock, otherwise it contains the address of | |
2087 | the collecting_t object on the stack of the thread which acquired it. | |
2088 | ||
2089 | At this stage, the stack pointer points to this thread's collecting_t | |
2090 | object. | |
2091 | ||
2092 | We use the following registers: | |
2093 | - x0: Address of the lock. | |
2094 | - x1: Pointer to collecting_t object. | |
2095 | - x2: Scratch register. | |
2096 | ||
2097 | MOV x0, #(lockaddr) | |
2098 | ... | |
2099 | MOV x1, sp | |
2100 | ||
2101 | ; Trigger an event local to this core. So the following WFE | |
2102 | ; instruction is ignored. | |
2103 | SEVL | |
2104 | again: | |
2105 | ; Wait for an event. The event is triggered by either the SEVL | |
2106 | ; or STLR instructions (store release). | |
2107 | WFE | |
2108 | ||
2109 | ; Atomically read at lockaddr. This marks the memory location as | |
2110 | ; exclusive. This instruction also has memory constraints which | |
2111 | ; make sure all previous data reads and writes are done before | |
2112 | ; executing it. | |
2113 | LDAXR x2, [x0] | |
2114 | ||
2115 | ; Try again if another thread holds the lock. | |
2116 | CBNZ x2, again | |
2117 | ||
2118 | ; We can lock it! Write the address of the collecting_t object. | |
2119 | ; This instruction will fail if the memory location is not marked | |
2120 | ; as exclusive anymore. If it succeeds, it will remove the | |
2121 | ; exclusive mark on the memory location. This way, if another | |
2122 | ; thread executes this instruction before us, we will fail and try | |
2123 | ; all over again. | |
2124 | STXR w2, x1, [x0] | |
2125 | CBNZ w2, again | |
2126 | ||
2127 | */ | |
2128 | ||
2129 | p += emit_mov_addr (p, x0, lockaddr); | |
2130 | p += emit_mov (p, x1, register_operand (sp)); | |
2131 | ||
2132 | p += emit_sevl (p); | |
2133 | p += emit_wfe (p); | |
2134 | p += emit_ldaxr (p, x2, x0); | |
2135 | p += emit_cb (p, 1, w2, -2 * 4); | |
2136 | p += emit_stxr (p, w2, x1, x0); | |
2137 | p += emit_cb (p, 1, x2, -4 * 4); | |
2138 | ||
2139 | /* Call collector (struct tracepoint *, unsigned char *): | |
2140 | ||
2141 | MOV x0, #(tpoint) | |
2142 | ... | |
2143 | ||
2144 | ; Saved registers start after the collecting_t object. | |
2145 | ADD x1, sp, #16 | |
2146 | ||
2147 | ; We use an intra-procedure-call scratch register. | |
2148 | MOV ip0, #(collector) | |
2149 | ... | |
2150 | ||
2151 | ; And call back to C! | |
2152 | BLR ip0 | |
2153 | ||
2154 | */ | |
2155 | ||
2156 | p += emit_mov_addr (p, x0, tpoint); | |
2157 | p += emit_add (p, x1, sp, immediate_operand (16)); | |
2158 | ||
2159 | p += emit_mov_addr (p, ip0, collector); | |
2160 | p += emit_blr (p, ip0); | |
2161 | ||
2162 | /* Release the lock. | |
2163 | ||
2164 | MOV x0, #(lockaddr) | |
2165 | ... | |
2166 | ||
2167 | ; This instruction is a normal store with memory ordering | |
2168 | ; constraints. Thanks to this we do not have to put a data | |
2169 | ; barrier instruction to make sure all data read and writes are done | |
30baf67b | 2170 | ; before this instruction is executed. Furthermore, this instruction |
bb903df0 PL |
2171 | ; will trigger an event, letting other threads know they can grab |
2172 | ; the lock. | |
2173 | STLR xzr, [x0] | |
2174 | ||
2175 | */ | |
2176 | p += emit_mov_addr (p, x0, lockaddr); | |
2177 | p += emit_stlr (p, xzr, x0); | |
2178 | ||
2179 | /* Free collecting_t object: | |
2180 | ||
2181 | ADD sp, sp, #16 | |
2182 | ||
2183 | */ | |
2184 | p += emit_add (p, sp, sp, immediate_operand (16)); | |
2185 | ||
2186 | /* Restore CPSR (NZCV), FPSR and FPCR. And free all special purpose | |
2187 | registers from the stack. | |
2188 | ||
2189 | LDR x2, [sp, #(2 * 16)] | |
2190 | LDR x1, [sp, #(1 * 16)] | |
2191 | LDR x0, [sp, #(0 * 16)] | |
2192 | ||
2193 | MSR NZCV, x2 | |
2194 | MSR FPSR, x1 | |
2195 | MSR FPCR, x0 | |
2196 | ||
2197 | ADD sp, sp #(5 * 16) | |
2198 | ||
2199 | */ | |
2200 | p += emit_ldr (p, x2, sp, offset_memory_operand (2 * 16)); | |
2201 | p += emit_ldr (p, x1, sp, offset_memory_operand (1 * 16)); | |
2202 | p += emit_ldr (p, x0, sp, offset_memory_operand (0 * 16)); | |
2203 | p += emit_msr (p, NZCV, x2); | |
2204 | p += emit_msr (p, FPSR, x1); | |
2205 | p += emit_msr (p, FPCR, x0); | |
2206 | ||
2207 | p += emit_add (p, sp, sp, immediate_operand (5 * 16)); | |
2208 | ||
2209 | /* Pop general purpose registers: | |
2210 | ||
2211 | LDR x0, [sp] | |
2212 | ... | |
2213 | LDR x30, [sp, #(30 * 16)] | |
2214 | ||
2215 | ADD sp, sp, #(31 * 16) | |
2216 | ||
2217 | */ | |
2218 | for (i = 0; i <= 30; i += 1) | |
2219 | p += emit_ldr (p, aarch64_register (i, 1), sp, | |
2220 | offset_memory_operand (i * 16)); | |
2221 | p += emit_add (p, sp, sp, immediate_operand (31 * 16)); | |
2222 | ||
2223 | /* Pop SIMD&FP registers: | |
2224 | ||
2225 | LDP q0, q1, [sp] | |
2226 | ... | |
2227 | LDP q30, q31, [sp, #(30 * 16)] | |
2228 | ||
2229 | ADD sp, sp, #(32 * 16) | |
2230 | ||
2231 | */ | |
2232 | for (i = 0; i <= 30; i += 2) | |
2233 | p += emit_ldp_q_offset (p, i, i + 1, sp, i * 16); | |
2234 | p += emit_add (p, sp, sp, immediate_operand (32 * 16)); | |
2235 | ||
2236 | /* Write the code into the inferior memory. */ | |
2237 | append_insns (&buildaddr, p - buf, buf); | |
2238 | ||
2239 | /* Now emit the relocated instruction. */ | |
2240 | *adjusted_insn_addr = buildaddr; | |
70b439f0 | 2241 | target_read_uint32 (tpaddr, &insn); |
0badd99f YQ |
2242 | |
2243 | insn_data.base.insn_addr = tpaddr; | |
2244 | insn_data.new_addr = buildaddr; | |
2245 | insn_data.insn_ptr = buf; | |
2246 | ||
2247 | aarch64_relocate_instruction (insn, &visitor, | |
2248 | (struct aarch64_insn_data *) &insn_data); | |
2249 | ||
bb903df0 | 2250 | /* We may not have been able to relocate the instruction. */ |
0badd99f | 2251 | if (insn_data.insn_ptr == buf) |
bb903df0 PL |
2252 | { |
2253 | sprintf (err, | |
2254 | "E.Could not relocate instruction from %s to %s.", | |
2255 | core_addr_to_string_nz (tpaddr), | |
2256 | core_addr_to_string_nz (buildaddr)); | |
2257 | return 1; | |
2258 | } | |
dfaffe9d | 2259 | else |
0badd99f | 2260 | append_insns (&buildaddr, insn_data.insn_ptr - buf, buf); |
dfaffe9d | 2261 | *adjusted_insn_addr_end = buildaddr; |
bb903df0 PL |
2262 | |
2263 | /* Go back to the start of the buffer. */ | |
2264 | p = buf; | |
2265 | ||
2266 | /* Emit a branch back from the jump pad. */ | |
2267 | offset = (tpaddr + orig_size - buildaddr); | |
2268 | if (!can_encode_int32 (offset, 28)) | |
2269 | { | |
2270 | sprintf (err, | |
2271 | "E.Jump back from jump pad too far from tracepoint " | |
2ac09a5b | 2272 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2273 | offset); |
2274 | return 1; | |
2275 | } | |
2276 | ||
2277 | p += emit_b (p, 0, offset); | |
2278 | append_insns (&buildaddr, p - buf, buf); | |
2279 | ||
2280 | /* Give the caller a branch instruction into the jump pad. */ | |
2281 | offset = (*jump_entry - tpaddr); | |
2282 | if (!can_encode_int32 (offset, 28)) | |
2283 | { | |
2284 | sprintf (err, | |
2285 | "E.Jump pad too far from tracepoint " | |
2ac09a5b | 2286 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2287 | offset); |
2288 | return 1; | |
2289 | } | |
2290 | ||
2291 | emit_b ((uint32_t *) jjump_pad_insn, 0, offset); | |
2292 | *jjump_pad_insn_size = 4; | |
2293 | ||
2294 | /* Return the end address of our pad. */ | |
2295 | *jump_entry = buildaddr; | |
2296 | ||
2297 | return 0; | |
2298 | } | |
2299 | ||
afbe19f8 PL |
2300 | /* Helper function writing LEN instructions from START into |
2301 | current_insn_ptr. */ | |
2302 | ||
2303 | static void | |
2304 | emit_ops_insns (const uint32_t *start, int len) | |
2305 | { | |
2306 | CORE_ADDR buildaddr = current_insn_ptr; | |
2307 | ||
2308 | if (debug_threads) | |
2309 | debug_printf ("Adding %d instrucions at %s\n", | |
2310 | len, paddress (buildaddr)); | |
2311 | ||
2312 | append_insns (&buildaddr, len, start); | |
2313 | current_insn_ptr = buildaddr; | |
2314 | } | |
2315 | ||
2316 | /* Pop a register from the stack. */ | |
2317 | ||
2318 | static int | |
2319 | emit_pop (uint32_t *buf, struct aarch64_register rt) | |
2320 | { | |
2321 | return emit_ldr (buf, rt, sp, postindex_memory_operand (1 * 16)); | |
2322 | } | |
2323 | ||
2324 | /* Push a register on the stack. */ | |
2325 | ||
2326 | static int | |
2327 | emit_push (uint32_t *buf, struct aarch64_register rt) | |
2328 | { | |
2329 | return emit_str (buf, rt, sp, preindex_memory_operand (-1 * 16)); | |
2330 | } | |
2331 | ||
2332 | /* Implementation of emit_ops method "emit_prologue". */ | |
2333 | ||
2334 | static void | |
2335 | aarch64_emit_prologue (void) | |
2336 | { | |
2337 | uint32_t buf[16]; | |
2338 | uint32_t *p = buf; | |
2339 | ||
2340 | /* This function emit a prologue for the following function prototype: | |
2341 | ||
2342 | enum eval_result_type f (unsigned char *regs, | |
2343 | ULONGEST *value); | |
2344 | ||
2345 | The first argument is a buffer of raw registers. The second | |
2346 | argument is the result of | |
2347 | evaluating the expression, which will be set to whatever is on top of | |
2348 | the stack at the end. | |
2349 | ||
2350 | The stack set up by the prologue is as such: | |
2351 | ||
2352 | High *------------------------------------------------------* | |
2353 | | LR | | |
2354 | | FP | <- FP | |
2355 | | x1 (ULONGEST *value) | | |
2356 | | x0 (unsigned char *regs) | | |
2357 | Low *------------------------------------------------------* | |
2358 | ||
2359 | As we are implementing a stack machine, each opcode can expand the | |
2360 | stack so we never know how far we are from the data saved by this | |
2361 | prologue. In order to be able refer to value and regs later, we save | |
2362 | the current stack pointer in the frame pointer. This way, it is not | |
2363 | clobbered when calling C functions. | |
2364 | ||
30baf67b | 2365 | Finally, throughout every operation, we are using register x0 as the |
afbe19f8 PL |
2366 | top of the stack, and x1 as a scratch register. */ |
2367 | ||
2368 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16)); | |
2369 | p += emit_str (p, lr, sp, offset_memory_operand (3 * 8)); | |
2370 | p += emit_str (p, fp, sp, offset_memory_operand (2 * 8)); | |
2371 | ||
2372 | p += emit_add (p, fp, sp, immediate_operand (2 * 8)); | |
2373 | ||
2374 | ||
2375 | emit_ops_insns (buf, p - buf); | |
2376 | } | |
2377 | ||
2378 | /* Implementation of emit_ops method "emit_epilogue". */ | |
2379 | ||
2380 | static void | |
2381 | aarch64_emit_epilogue (void) | |
2382 | { | |
2383 | uint32_t buf[16]; | |
2384 | uint32_t *p = buf; | |
2385 | ||
2386 | /* Store the result of the expression (x0) in *value. */ | |
2387 | p += emit_sub (p, x1, fp, immediate_operand (1 * 8)); | |
2388 | p += emit_ldr (p, x1, x1, offset_memory_operand (0)); | |
2389 | p += emit_str (p, x0, x1, offset_memory_operand (0)); | |
2390 | ||
2391 | /* Restore the previous state. */ | |
2392 | p += emit_add (p, sp, fp, immediate_operand (2 * 8)); | |
2393 | p += emit_ldp (p, fp, lr, fp, offset_memory_operand (0)); | |
2394 | ||
2395 | /* Return expr_eval_no_error. */ | |
2396 | p += emit_mov (p, x0, immediate_operand (expr_eval_no_error)); | |
2397 | p += emit_ret (p, lr); | |
2398 | ||
2399 | emit_ops_insns (buf, p - buf); | |
2400 | } | |
2401 | ||
2402 | /* Implementation of emit_ops method "emit_add". */ | |
2403 | ||
2404 | static void | |
2405 | aarch64_emit_add (void) | |
2406 | { | |
2407 | uint32_t buf[16]; | |
2408 | uint32_t *p = buf; | |
2409 | ||
2410 | p += emit_pop (p, x1); | |
45e3745e | 2411 | p += emit_add (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2412 | |
2413 | emit_ops_insns (buf, p - buf); | |
2414 | } | |
2415 | ||
2416 | /* Implementation of emit_ops method "emit_sub". */ | |
2417 | ||
2418 | static void | |
2419 | aarch64_emit_sub (void) | |
2420 | { | |
2421 | uint32_t buf[16]; | |
2422 | uint32_t *p = buf; | |
2423 | ||
2424 | p += emit_pop (p, x1); | |
45e3745e | 2425 | p += emit_sub (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2426 | |
2427 | emit_ops_insns (buf, p - buf); | |
2428 | } | |
2429 | ||
2430 | /* Implementation of emit_ops method "emit_mul". */ | |
2431 | ||
2432 | static void | |
2433 | aarch64_emit_mul (void) | |
2434 | { | |
2435 | uint32_t buf[16]; | |
2436 | uint32_t *p = buf; | |
2437 | ||
2438 | p += emit_pop (p, x1); | |
2439 | p += emit_mul (p, x0, x1, x0); | |
2440 | ||
2441 | emit_ops_insns (buf, p - buf); | |
2442 | } | |
2443 | ||
2444 | /* Implementation of emit_ops method "emit_lsh". */ | |
2445 | ||
2446 | static void | |
2447 | aarch64_emit_lsh (void) | |
2448 | { | |
2449 | uint32_t buf[16]; | |
2450 | uint32_t *p = buf; | |
2451 | ||
2452 | p += emit_pop (p, x1); | |
2453 | p += emit_lslv (p, x0, x1, x0); | |
2454 | ||
2455 | emit_ops_insns (buf, p - buf); | |
2456 | } | |
2457 | ||
2458 | /* Implementation of emit_ops method "emit_rsh_signed". */ | |
2459 | ||
2460 | static void | |
2461 | aarch64_emit_rsh_signed (void) | |
2462 | { | |
2463 | uint32_t buf[16]; | |
2464 | uint32_t *p = buf; | |
2465 | ||
2466 | p += emit_pop (p, x1); | |
2467 | p += emit_asrv (p, x0, x1, x0); | |
2468 | ||
2469 | emit_ops_insns (buf, p - buf); | |
2470 | } | |
2471 | ||
2472 | /* Implementation of emit_ops method "emit_rsh_unsigned". */ | |
2473 | ||
2474 | static void | |
2475 | aarch64_emit_rsh_unsigned (void) | |
2476 | { | |
2477 | uint32_t buf[16]; | |
2478 | uint32_t *p = buf; | |
2479 | ||
2480 | p += emit_pop (p, x1); | |
2481 | p += emit_lsrv (p, x0, x1, x0); | |
2482 | ||
2483 | emit_ops_insns (buf, p - buf); | |
2484 | } | |
2485 | ||
2486 | /* Implementation of emit_ops method "emit_ext". */ | |
2487 | ||
2488 | static void | |
2489 | aarch64_emit_ext (int arg) | |
2490 | { | |
2491 | uint32_t buf[16]; | |
2492 | uint32_t *p = buf; | |
2493 | ||
2494 | p += emit_sbfx (p, x0, x0, 0, arg); | |
2495 | ||
2496 | emit_ops_insns (buf, p - buf); | |
2497 | } | |
2498 | ||
2499 | /* Implementation of emit_ops method "emit_log_not". */ | |
2500 | ||
2501 | static void | |
2502 | aarch64_emit_log_not (void) | |
2503 | { | |
2504 | uint32_t buf[16]; | |
2505 | uint32_t *p = buf; | |
2506 | ||
2507 | /* If the top of the stack is 0, replace it with 1. Else replace it with | |
2508 | 0. */ | |
2509 | ||
2510 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2511 | p += emit_cset (p, x0, EQ); | |
2512 | ||
2513 | emit_ops_insns (buf, p - buf); | |
2514 | } | |
2515 | ||
2516 | /* Implementation of emit_ops method "emit_bit_and". */ | |
2517 | ||
2518 | static void | |
2519 | aarch64_emit_bit_and (void) | |
2520 | { | |
2521 | uint32_t buf[16]; | |
2522 | uint32_t *p = buf; | |
2523 | ||
2524 | p += emit_pop (p, x1); | |
2525 | p += emit_and (p, x0, x0, x1); | |
2526 | ||
2527 | emit_ops_insns (buf, p - buf); | |
2528 | } | |
2529 | ||
2530 | /* Implementation of emit_ops method "emit_bit_or". */ | |
2531 | ||
2532 | static void | |
2533 | aarch64_emit_bit_or (void) | |
2534 | { | |
2535 | uint32_t buf[16]; | |
2536 | uint32_t *p = buf; | |
2537 | ||
2538 | p += emit_pop (p, x1); | |
2539 | p += emit_orr (p, x0, x0, x1); | |
2540 | ||
2541 | emit_ops_insns (buf, p - buf); | |
2542 | } | |
2543 | ||
2544 | /* Implementation of emit_ops method "emit_bit_xor". */ | |
2545 | ||
2546 | static void | |
2547 | aarch64_emit_bit_xor (void) | |
2548 | { | |
2549 | uint32_t buf[16]; | |
2550 | uint32_t *p = buf; | |
2551 | ||
2552 | p += emit_pop (p, x1); | |
2553 | p += emit_eor (p, x0, x0, x1); | |
2554 | ||
2555 | emit_ops_insns (buf, p - buf); | |
2556 | } | |
2557 | ||
2558 | /* Implementation of emit_ops method "emit_bit_not". */ | |
2559 | ||
2560 | static void | |
2561 | aarch64_emit_bit_not (void) | |
2562 | { | |
2563 | uint32_t buf[16]; | |
2564 | uint32_t *p = buf; | |
2565 | ||
2566 | p += emit_mvn (p, x0, x0); | |
2567 | ||
2568 | emit_ops_insns (buf, p - buf); | |
2569 | } | |
2570 | ||
2571 | /* Implementation of emit_ops method "emit_equal". */ | |
2572 | ||
2573 | static void | |
2574 | aarch64_emit_equal (void) | |
2575 | { | |
2576 | uint32_t buf[16]; | |
2577 | uint32_t *p = buf; | |
2578 | ||
2579 | p += emit_pop (p, x1); | |
2580 | p += emit_cmp (p, x0, register_operand (x1)); | |
2581 | p += emit_cset (p, x0, EQ); | |
2582 | ||
2583 | emit_ops_insns (buf, p - buf); | |
2584 | } | |
2585 | ||
2586 | /* Implementation of emit_ops method "emit_less_signed". */ | |
2587 | ||
2588 | static void | |
2589 | aarch64_emit_less_signed (void) | |
2590 | { | |
2591 | uint32_t buf[16]; | |
2592 | uint32_t *p = buf; | |
2593 | ||
2594 | p += emit_pop (p, x1); | |
2595 | p += emit_cmp (p, x1, register_operand (x0)); | |
2596 | p += emit_cset (p, x0, LT); | |
2597 | ||
2598 | emit_ops_insns (buf, p - buf); | |
2599 | } | |
2600 | ||
2601 | /* Implementation of emit_ops method "emit_less_unsigned". */ | |
2602 | ||
2603 | static void | |
2604 | aarch64_emit_less_unsigned (void) | |
2605 | { | |
2606 | uint32_t buf[16]; | |
2607 | uint32_t *p = buf; | |
2608 | ||
2609 | p += emit_pop (p, x1); | |
2610 | p += emit_cmp (p, x1, register_operand (x0)); | |
2611 | p += emit_cset (p, x0, LO); | |
2612 | ||
2613 | emit_ops_insns (buf, p - buf); | |
2614 | } | |
2615 | ||
2616 | /* Implementation of emit_ops method "emit_ref". */ | |
2617 | ||
2618 | static void | |
2619 | aarch64_emit_ref (int size) | |
2620 | { | |
2621 | uint32_t buf[16]; | |
2622 | uint32_t *p = buf; | |
2623 | ||
2624 | switch (size) | |
2625 | { | |
2626 | case 1: | |
2627 | p += emit_ldrb (p, w0, x0, offset_memory_operand (0)); | |
2628 | break; | |
2629 | case 2: | |
2630 | p += emit_ldrh (p, w0, x0, offset_memory_operand (0)); | |
2631 | break; | |
2632 | case 4: | |
2633 | p += emit_ldr (p, w0, x0, offset_memory_operand (0)); | |
2634 | break; | |
2635 | case 8: | |
2636 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2637 | break; | |
2638 | default: | |
2639 | /* Unknown size, bail on compilation. */ | |
2640 | emit_error = 1; | |
2641 | break; | |
2642 | } | |
2643 | ||
2644 | emit_ops_insns (buf, p - buf); | |
2645 | } | |
2646 | ||
2647 | /* Implementation of emit_ops method "emit_if_goto". */ | |
2648 | ||
2649 | static void | |
2650 | aarch64_emit_if_goto (int *offset_p, int *size_p) | |
2651 | { | |
2652 | uint32_t buf[16]; | |
2653 | uint32_t *p = buf; | |
2654 | ||
2655 | /* The Z flag is set or cleared here. */ | |
2656 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2657 | /* This instruction must not change the Z flag. */ | |
2658 | p += emit_pop (p, x0); | |
2659 | /* Branch over the next instruction if x0 == 0. */ | |
2660 | p += emit_bcond (p, EQ, 8); | |
2661 | ||
2662 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2663 | if (offset_p) | |
2664 | *offset_p = (p - buf) * 4; | |
2665 | if (size_p) | |
2666 | *size_p = 4; | |
2667 | p += emit_nop (p); | |
2668 | ||
2669 | emit_ops_insns (buf, p - buf); | |
2670 | } | |
2671 | ||
2672 | /* Implementation of emit_ops method "emit_goto". */ | |
2673 | ||
2674 | static void | |
2675 | aarch64_emit_goto (int *offset_p, int *size_p) | |
2676 | { | |
2677 | uint32_t buf[16]; | |
2678 | uint32_t *p = buf; | |
2679 | ||
2680 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2681 | if (offset_p) | |
2682 | *offset_p = 0; | |
2683 | if (size_p) | |
2684 | *size_p = 4; | |
2685 | p += emit_nop (p); | |
2686 | ||
2687 | emit_ops_insns (buf, p - buf); | |
2688 | } | |
2689 | ||
2690 | /* Implementation of emit_ops method "write_goto_address". */ | |
2691 | ||
bb1183e2 | 2692 | static void |
afbe19f8 PL |
2693 | aarch64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) |
2694 | { | |
2695 | uint32_t insn; | |
2696 | ||
2697 | emit_b (&insn, 0, to - from); | |
2698 | append_insns (&from, 1, &insn); | |
2699 | } | |
2700 | ||
2701 | /* Implementation of emit_ops method "emit_const". */ | |
2702 | ||
2703 | static void | |
2704 | aarch64_emit_const (LONGEST num) | |
2705 | { | |
2706 | uint32_t buf[16]; | |
2707 | uint32_t *p = buf; | |
2708 | ||
2709 | p += emit_mov_addr (p, x0, num); | |
2710 | ||
2711 | emit_ops_insns (buf, p - buf); | |
2712 | } | |
2713 | ||
2714 | /* Implementation of emit_ops method "emit_call". */ | |
2715 | ||
2716 | static void | |
2717 | aarch64_emit_call (CORE_ADDR fn) | |
2718 | { | |
2719 | uint32_t buf[16]; | |
2720 | uint32_t *p = buf; | |
2721 | ||
2722 | p += emit_mov_addr (p, ip0, fn); | |
2723 | p += emit_blr (p, ip0); | |
2724 | ||
2725 | emit_ops_insns (buf, p - buf); | |
2726 | } | |
2727 | ||
2728 | /* Implementation of emit_ops method "emit_reg". */ | |
2729 | ||
2730 | static void | |
2731 | aarch64_emit_reg (int reg) | |
2732 | { | |
2733 | uint32_t buf[16]; | |
2734 | uint32_t *p = buf; | |
2735 | ||
2736 | /* Set x0 to unsigned char *regs. */ | |
2737 | p += emit_sub (p, x0, fp, immediate_operand (2 * 8)); | |
2738 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2739 | p += emit_mov (p, x1, immediate_operand (reg)); | |
2740 | ||
2741 | emit_ops_insns (buf, p - buf); | |
2742 | ||
2743 | aarch64_emit_call (get_raw_reg_func_addr ()); | |
2744 | } | |
2745 | ||
2746 | /* Implementation of emit_ops method "emit_pop". */ | |
2747 | ||
2748 | static void | |
2749 | aarch64_emit_pop (void) | |
2750 | { | |
2751 | uint32_t buf[16]; | |
2752 | uint32_t *p = buf; | |
2753 | ||
2754 | p += emit_pop (p, x0); | |
2755 | ||
2756 | emit_ops_insns (buf, p - buf); | |
2757 | } | |
2758 | ||
2759 | /* Implementation of emit_ops method "emit_stack_flush". */ | |
2760 | ||
2761 | static void | |
2762 | aarch64_emit_stack_flush (void) | |
2763 | { | |
2764 | uint32_t buf[16]; | |
2765 | uint32_t *p = buf; | |
2766 | ||
2767 | p += emit_push (p, x0); | |
2768 | ||
2769 | emit_ops_insns (buf, p - buf); | |
2770 | } | |
2771 | ||
2772 | /* Implementation of emit_ops method "emit_zero_ext". */ | |
2773 | ||
2774 | static void | |
2775 | aarch64_emit_zero_ext (int arg) | |
2776 | { | |
2777 | uint32_t buf[16]; | |
2778 | uint32_t *p = buf; | |
2779 | ||
2780 | p += emit_ubfx (p, x0, x0, 0, arg); | |
2781 | ||
2782 | emit_ops_insns (buf, p - buf); | |
2783 | } | |
2784 | ||
2785 | /* Implementation of emit_ops method "emit_swap". */ | |
2786 | ||
2787 | static void | |
2788 | aarch64_emit_swap (void) | |
2789 | { | |
2790 | uint32_t buf[16]; | |
2791 | uint32_t *p = buf; | |
2792 | ||
2793 | p += emit_ldr (p, x1, sp, offset_memory_operand (0 * 16)); | |
2794 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2795 | p += emit_mov (p, x0, register_operand (x1)); | |
2796 | ||
2797 | emit_ops_insns (buf, p - buf); | |
2798 | } | |
2799 | ||
2800 | /* Implementation of emit_ops method "emit_stack_adjust". */ | |
2801 | ||
2802 | static void | |
2803 | aarch64_emit_stack_adjust (int n) | |
2804 | { | |
2805 | /* This is not needed with our design. */ | |
2806 | uint32_t buf[16]; | |
2807 | uint32_t *p = buf; | |
2808 | ||
2809 | p += emit_add (p, sp, sp, immediate_operand (n * 16)); | |
2810 | ||
2811 | emit_ops_insns (buf, p - buf); | |
2812 | } | |
2813 | ||
2814 | /* Implementation of emit_ops method "emit_int_call_1". */ | |
2815 | ||
2816 | static void | |
2817 | aarch64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2818 | { | |
2819 | uint32_t buf[16]; | |
2820 | uint32_t *p = buf; | |
2821 | ||
2822 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2823 | ||
2824 | emit_ops_insns (buf, p - buf); | |
2825 | ||
2826 | aarch64_emit_call (fn); | |
2827 | } | |
2828 | ||
2829 | /* Implementation of emit_ops method "emit_void_call_2". */ | |
2830 | ||
2831 | static void | |
2832 | aarch64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2833 | { | |
2834 | uint32_t buf[16]; | |
2835 | uint32_t *p = buf; | |
2836 | ||
2837 | /* Push x0 on the stack. */ | |
2838 | aarch64_emit_stack_flush (); | |
2839 | ||
2840 | /* Setup arguments for the function call: | |
2841 | ||
2842 | x0: arg1 | |
2843 | x1: top of the stack | |
2844 | ||
2845 | MOV x1, x0 | |
2846 | MOV x0, #arg1 */ | |
2847 | ||
2848 | p += emit_mov (p, x1, register_operand (x0)); | |
2849 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2850 | ||
2851 | emit_ops_insns (buf, p - buf); | |
2852 | ||
2853 | aarch64_emit_call (fn); | |
2854 | ||
2855 | /* Restore x0. */ | |
2856 | aarch64_emit_pop (); | |
2857 | } | |
2858 | ||
2859 | /* Implementation of emit_ops method "emit_eq_goto". */ | |
2860 | ||
2861 | static void | |
2862 | aarch64_emit_eq_goto (int *offset_p, int *size_p) | |
2863 | { | |
2864 | uint32_t buf[16]; | |
2865 | uint32_t *p = buf; | |
2866 | ||
2867 | p += emit_pop (p, x1); | |
2868 | p += emit_cmp (p, x1, register_operand (x0)); | |
2869 | /* Branch over the next instruction if x0 != x1. */ | |
2870 | p += emit_bcond (p, NE, 8); | |
2871 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2872 | if (offset_p) | |
2873 | *offset_p = (p - buf) * 4; | |
2874 | if (size_p) | |
2875 | *size_p = 4; | |
2876 | p += emit_nop (p); | |
2877 | ||
2878 | emit_ops_insns (buf, p - buf); | |
2879 | } | |
2880 | ||
2881 | /* Implementation of emit_ops method "emit_ne_goto". */ | |
2882 | ||
2883 | static void | |
2884 | aarch64_emit_ne_goto (int *offset_p, int *size_p) | |
2885 | { | |
2886 | uint32_t buf[16]; | |
2887 | uint32_t *p = buf; | |
2888 | ||
2889 | p += emit_pop (p, x1); | |
2890 | p += emit_cmp (p, x1, register_operand (x0)); | |
2891 | /* Branch over the next instruction if x0 == x1. */ | |
2892 | p += emit_bcond (p, EQ, 8); | |
2893 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2894 | if (offset_p) | |
2895 | *offset_p = (p - buf) * 4; | |
2896 | if (size_p) | |
2897 | *size_p = 4; | |
2898 | p += emit_nop (p); | |
2899 | ||
2900 | emit_ops_insns (buf, p - buf); | |
2901 | } | |
2902 | ||
2903 | /* Implementation of emit_ops method "emit_lt_goto". */ | |
2904 | ||
2905 | static void | |
2906 | aarch64_emit_lt_goto (int *offset_p, int *size_p) | |
2907 | { | |
2908 | uint32_t buf[16]; | |
2909 | uint32_t *p = buf; | |
2910 | ||
2911 | p += emit_pop (p, x1); | |
2912 | p += emit_cmp (p, x1, register_operand (x0)); | |
2913 | /* Branch over the next instruction if x0 >= x1. */ | |
2914 | p += emit_bcond (p, GE, 8); | |
2915 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2916 | if (offset_p) | |
2917 | *offset_p = (p - buf) * 4; | |
2918 | if (size_p) | |
2919 | *size_p = 4; | |
2920 | p += emit_nop (p); | |
2921 | ||
2922 | emit_ops_insns (buf, p - buf); | |
2923 | } | |
2924 | ||
2925 | /* Implementation of emit_ops method "emit_le_goto". */ | |
2926 | ||
2927 | static void | |
2928 | aarch64_emit_le_goto (int *offset_p, int *size_p) | |
2929 | { | |
2930 | uint32_t buf[16]; | |
2931 | uint32_t *p = buf; | |
2932 | ||
2933 | p += emit_pop (p, x1); | |
2934 | p += emit_cmp (p, x1, register_operand (x0)); | |
2935 | /* Branch over the next instruction if x0 > x1. */ | |
2936 | p += emit_bcond (p, GT, 8); | |
2937 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2938 | if (offset_p) | |
2939 | *offset_p = (p - buf) * 4; | |
2940 | if (size_p) | |
2941 | *size_p = 4; | |
2942 | p += emit_nop (p); | |
2943 | ||
2944 | emit_ops_insns (buf, p - buf); | |
2945 | } | |
2946 | ||
2947 | /* Implementation of emit_ops method "emit_gt_goto". */ | |
2948 | ||
2949 | static void | |
2950 | aarch64_emit_gt_goto (int *offset_p, int *size_p) | |
2951 | { | |
2952 | uint32_t buf[16]; | |
2953 | uint32_t *p = buf; | |
2954 | ||
2955 | p += emit_pop (p, x1); | |
2956 | p += emit_cmp (p, x1, register_operand (x0)); | |
2957 | /* Branch over the next instruction if x0 <= x1. */ | |
2958 | p += emit_bcond (p, LE, 8); | |
2959 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2960 | if (offset_p) | |
2961 | *offset_p = (p - buf) * 4; | |
2962 | if (size_p) | |
2963 | *size_p = 4; | |
2964 | p += emit_nop (p); | |
2965 | ||
2966 | emit_ops_insns (buf, p - buf); | |
2967 | } | |
2968 | ||
2969 | /* Implementation of emit_ops method "emit_ge_got". */ | |
2970 | ||
2971 | static void | |
2972 | aarch64_emit_ge_got (int *offset_p, int *size_p) | |
2973 | { | |
2974 | uint32_t buf[16]; | |
2975 | uint32_t *p = buf; | |
2976 | ||
2977 | p += emit_pop (p, x1); | |
2978 | p += emit_cmp (p, x1, register_operand (x0)); | |
2979 | /* Branch over the next instruction if x0 <= x1. */ | |
2980 | p += emit_bcond (p, LT, 8); | |
2981 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2982 | if (offset_p) | |
2983 | *offset_p = (p - buf) * 4; | |
2984 | if (size_p) | |
2985 | *size_p = 4; | |
2986 | p += emit_nop (p); | |
2987 | ||
2988 | emit_ops_insns (buf, p - buf); | |
2989 | } | |
2990 | ||
2991 | static struct emit_ops aarch64_emit_ops_impl = | |
2992 | { | |
2993 | aarch64_emit_prologue, | |
2994 | aarch64_emit_epilogue, | |
2995 | aarch64_emit_add, | |
2996 | aarch64_emit_sub, | |
2997 | aarch64_emit_mul, | |
2998 | aarch64_emit_lsh, | |
2999 | aarch64_emit_rsh_signed, | |
3000 | aarch64_emit_rsh_unsigned, | |
3001 | aarch64_emit_ext, | |
3002 | aarch64_emit_log_not, | |
3003 | aarch64_emit_bit_and, | |
3004 | aarch64_emit_bit_or, | |
3005 | aarch64_emit_bit_xor, | |
3006 | aarch64_emit_bit_not, | |
3007 | aarch64_emit_equal, | |
3008 | aarch64_emit_less_signed, | |
3009 | aarch64_emit_less_unsigned, | |
3010 | aarch64_emit_ref, | |
3011 | aarch64_emit_if_goto, | |
3012 | aarch64_emit_goto, | |
3013 | aarch64_write_goto_address, | |
3014 | aarch64_emit_const, | |
3015 | aarch64_emit_call, | |
3016 | aarch64_emit_reg, | |
3017 | aarch64_emit_pop, | |
3018 | aarch64_emit_stack_flush, | |
3019 | aarch64_emit_zero_ext, | |
3020 | aarch64_emit_swap, | |
3021 | aarch64_emit_stack_adjust, | |
3022 | aarch64_emit_int_call_1, | |
3023 | aarch64_emit_void_call_2, | |
3024 | aarch64_emit_eq_goto, | |
3025 | aarch64_emit_ne_goto, | |
3026 | aarch64_emit_lt_goto, | |
3027 | aarch64_emit_le_goto, | |
3028 | aarch64_emit_gt_goto, | |
3029 | aarch64_emit_ge_got, | |
3030 | }; | |
3031 | ||
3032 | /* Implementation of linux_target_ops method "emit_ops". */ | |
3033 | ||
3034 | static struct emit_ops * | |
3035 | aarch64_emit_ops (void) | |
3036 | { | |
3037 | return &aarch64_emit_ops_impl; | |
3038 | } | |
3039 | ||
bb903df0 PL |
3040 | /* Implementation of linux_target_ops method |
3041 | "get_min_fast_tracepoint_insn_len". */ | |
3042 | ||
3043 | static int | |
3044 | aarch64_get_min_fast_tracepoint_insn_len (void) | |
3045 | { | |
3046 | return 4; | |
3047 | } | |
3048 | ||
d1d0aea1 PL |
3049 | /* Implementation of linux_target_ops method "supports_range_stepping". */ |
3050 | ||
3051 | static int | |
3052 | aarch64_supports_range_stepping (void) | |
3053 | { | |
3054 | return 1; | |
3055 | } | |
3056 | ||
dd373349 AT |
3057 | /* Implementation of linux_target_ops method "sw_breakpoint_from_kind". */ |
3058 | ||
3059 | static const gdb_byte * | |
3060 | aarch64_sw_breakpoint_from_kind (int kind, int *size) | |
3061 | { | |
17b1509a YQ |
3062 | if (is_64bit_tdesc ()) |
3063 | { | |
3064 | *size = aarch64_breakpoint_len; | |
3065 | return aarch64_breakpoint; | |
3066 | } | |
3067 | else | |
3068 | return arm_sw_breakpoint_from_kind (kind, size); | |
3069 | } | |
3070 | ||
06250e4e | 3071 | /* Implementation of target ops method "breakpoint_kind_from_pc". */ |
17b1509a | 3072 | |
06250e4e TBA |
3073 | int |
3074 | aarch64_target::breakpoint_kind_from_pc (CORE_ADDR *pcptr) | |
17b1509a YQ |
3075 | { |
3076 | if (is_64bit_tdesc ()) | |
3077 | return aarch64_breakpoint_len; | |
3078 | else | |
3079 | return arm_breakpoint_kind_from_pc (pcptr); | |
3080 | } | |
3081 | ||
06250e4e | 3082 | /* Implementation of the target ops method |
17b1509a YQ |
3083 | "breakpoint_kind_from_current_state". */ |
3084 | ||
06250e4e TBA |
3085 | int |
3086 | aarch64_target::breakpoint_kind_from_current_state (CORE_ADDR *pcptr) | |
17b1509a YQ |
3087 | { |
3088 | if (is_64bit_tdesc ()) | |
3089 | return aarch64_breakpoint_len; | |
3090 | else | |
3091 | return arm_breakpoint_kind_from_current_state (pcptr); | |
dd373349 AT |
3092 | } |
3093 | ||
7d00775e AT |
3094 | /* Support for hardware single step. */ |
3095 | ||
3096 | static int | |
3097 | aarch64_supports_hardware_single_step (void) | |
3098 | { | |
3099 | return 1; | |
3100 | } | |
3101 | ||
176eb98c MS |
3102 | struct linux_target_ops the_low_target = |
3103 | { | |
dd373349 | 3104 | aarch64_sw_breakpoint_from_kind, |
fa5308bd | 3105 | NULL, /* get_next_pcs */ |
421530db | 3106 | 0, /* decr_pc_after_break */ |
176eb98c | 3107 | aarch64_breakpoint_at, |
802e8e6d | 3108 | aarch64_supports_z_point_type, |
176eb98c MS |
3109 | aarch64_insert_point, |
3110 | aarch64_remove_point, | |
3111 | aarch64_stopped_by_watchpoint, | |
3112 | aarch64_stopped_data_address, | |
421530db PL |
3113 | NULL, /* collect_ptrace_register */ |
3114 | NULL, /* supply_ptrace_register */ | |
ade90bde | 3115 | aarch64_linux_siginfo_fixup, |
176eb98c | 3116 | aarch64_linux_new_process, |
04ec7890 | 3117 | aarch64_linux_delete_process, |
176eb98c | 3118 | aarch64_linux_new_thread, |
466eecee | 3119 | aarch64_linux_delete_thread, |
3a8a0396 | 3120 | aarch64_linux_new_fork, |
176eb98c | 3121 | aarch64_linux_prepare_to_resume, |
421530db | 3122 | NULL, /* process_qsupported */ |
7671bf47 | 3123 | aarch64_supports_tracepoints, |
bb903df0 PL |
3124 | aarch64_get_thread_area, |
3125 | aarch64_install_fast_tracepoint_jump_pad, | |
afbe19f8 | 3126 | aarch64_emit_ops, |
bb903df0 | 3127 | aarch64_get_min_fast_tracepoint_insn_len, |
d1d0aea1 | 3128 | aarch64_supports_range_stepping, |
7d00775e | 3129 | aarch64_supports_hardware_single_step, |
061fc021 | 3130 | aarch64_get_syscall_trapinfo, |
176eb98c | 3131 | }; |
3aee8918 | 3132 | |
ef0478f6 TBA |
3133 | /* The linux target ops object. */ |
3134 | ||
3135 | linux_process_target *the_linux_target = &the_aarch64_target; | |
3136 | ||
3aee8918 PA |
3137 | void |
3138 | initialize_low_arch (void) | |
3139 | { | |
3b53ae99 YQ |
3140 | initialize_low_arch_aarch32 (); |
3141 | ||
3aee8918 | 3142 | initialize_regsets_info (&aarch64_regsets_info); |
02895270 | 3143 | initialize_regsets_info (&aarch64_sve_regsets_info); |
3aee8918 | 3144 | } |