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1 /* Target-dependent code for GNU/Linux AArch64.
2
3 Copyright (C) 2009-2021 Free Software Foundation, Inc.
4 Contributed by ARM Ltd.
5
6 This file is part of GDB.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20
21 #include "defs.h"
22
23 #include "gdbarch.h"
24 #include "glibc-tdep.h"
25 #include "linux-tdep.h"
26 #include "aarch64-tdep.h"
27 #include "aarch64-linux-tdep.h"
28 #include "osabi.h"
29 #include "solib-svr4.h"
30 #include "symtab.h"
31 #include "tramp-frame.h"
32 #include "trad-frame.h"
33 #include "target.h"
34 #include "target/target.h"
35 #include "expop.h"
36
37 #include "regcache.h"
38 #include "regset.h"
39
40 #include "stap-probe.h"
41 #include "parser-defs.h"
42 #include "user-regs.h"
43 #include "xml-syscall.h"
44 #include <ctype.h>
45
46 #include "record-full.h"
47 #include "linux-record.h"
48
49 #include "arch/aarch64-mte-linux.h"
50
51 #include "arch-utils.h"
52 #include "value.h"
53
54 #include "gdbsupport/selftest.h"
55
56 /* Signal frame handling.
57
58 +------------+ ^
59 | saved lr | |
60 +->| saved fp |--+
61 | | |
62 | | |
63 | +------------+
64 | | saved lr |
65 +--| saved fp |
66 ^ | |
67 | | |
68 | +------------+
69 ^ | |
70 | | signal |
71 | | | SIGTRAMP_FRAME (struct rt_sigframe)
72 | | saved regs |
73 +--| saved sp |--> interrupted_sp
74 | | saved pc |--> interrupted_pc
75 | | |
76 | +------------+
77 | | saved lr |--> default_restorer (movz x8, NR_sys_rt_sigreturn; svc 0)
78 +--| saved fp |<- FP
79 | | NORMAL_FRAME
80 | |<- SP
81 +------------+
82
83 On signal delivery, the kernel will create a signal handler stack
84 frame and setup the return address in LR to point at restorer stub.
85 The signal stack frame is defined by:
86
87 struct rt_sigframe
88 {
89 siginfo_t info;
90 struct ucontext uc;
91 };
92
93 The ucontext has the following form:
94 struct ucontext
95 {
96 unsigned long uc_flags;
97 struct ucontext *uc_link;
98 stack_t uc_stack;
99 sigset_t uc_sigmask;
100 struct sigcontext uc_mcontext;
101 };
102
103 struct sigcontext
104 {
105 unsigned long fault_address;
106 unsigned long regs[31];
107 unsigned long sp; / * 31 * /
108 unsigned long pc; / * 32 * /
109 unsigned long pstate; / * 33 * /
110 __u8 __reserved[4096]
111 };
112
113 The reserved space in sigcontext contains additional structures, each starting
114 with a aarch64_ctx, which specifies a unique identifier and the total size of
115 the structure. The final structure in reserved will start will a null
116 aarch64_ctx. The penultimate entry in reserved may be a extra_context which
117 then points to a further block of reserved space.
118
119 struct aarch64_ctx {
120 u32 magic;
121 u32 size;
122 };
123
124 The restorer stub will always have the form:
125
126 d28015a8 movz x8, #0xad
127 d4000001 svc #0x0
128
129 This is a system call sys_rt_sigreturn.
130
131 We detect signal frames by snooping the return code for the restorer
132 instruction sequence.
133
134 The handler then needs to recover the saved register set from
135 ucontext.uc_mcontext. */
136
137 /* These magic numbers need to reflect the layout of the kernel
138 defined struct rt_sigframe and ucontext. */
139 #define AARCH64_SIGCONTEXT_REG_SIZE 8
140 #define AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET 128
141 #define AARCH64_UCONTEXT_SIGCONTEXT_OFFSET 176
142 #define AARCH64_SIGCONTEXT_XO_OFFSET 8
143 #define AARCH64_SIGCONTEXT_RESERVED_OFFSET 288
144
145 #define AARCH64_SIGCONTEXT_RESERVED_SIZE 4096
146
147 /* Unique identifiers that may be used for aarch64_ctx.magic. */
148 #define AARCH64_EXTRA_MAGIC 0x45585401
149 #define AARCH64_FPSIMD_MAGIC 0x46508001
150 #define AARCH64_SVE_MAGIC 0x53564501
151
152 /* Defines for the extra_context that follows an AARCH64_EXTRA_MAGIC. */
153 #define AARCH64_EXTRA_DATAP_OFFSET 8
154
155 /* Defines for the fpsimd that follows an AARCH64_FPSIMD_MAGIC. */
156 #define AARCH64_FPSIMD_FPSR_OFFSET 8
157 #define AARCH64_FPSIMD_FPCR_OFFSET 12
158 #define AARCH64_FPSIMD_V0_OFFSET 16
159 #define AARCH64_FPSIMD_VREG_SIZE 16
160
161 /* Defines for the sve structure that follows an AARCH64_SVE_MAGIC. */
162 #define AARCH64_SVE_CONTEXT_VL_OFFSET 8
163 #define AARCH64_SVE_CONTEXT_REGS_OFFSET 16
164 #define AARCH64_SVE_CONTEXT_P_REGS_OFFSET(vq) (32 * vq * 16)
165 #define AARCH64_SVE_CONTEXT_FFR_OFFSET(vq) \
166 (AARCH64_SVE_CONTEXT_P_REGS_OFFSET (vq) + (16 * vq * 2))
167 #define AARCH64_SVE_CONTEXT_SIZE(vq) \
168 (AARCH64_SVE_CONTEXT_FFR_OFFSET (vq) + (vq * 2))
169
170
171 /* Read an aarch64_ctx, returning the magic value, and setting *SIZE to the
172 size, or return 0 on error. */
173
174 static uint32_t
175 read_aarch64_ctx (CORE_ADDR ctx_addr, enum bfd_endian byte_order,
176 uint32_t *size)
177 {
178 uint32_t magic = 0;
179 gdb_byte buf[4];
180
181 if (target_read_memory (ctx_addr, buf, 4) != 0)
182 return 0;
183 magic = extract_unsigned_integer (buf, 4, byte_order);
184
185 if (target_read_memory (ctx_addr + 4, buf, 4) != 0)
186 return 0;
187 *size = extract_unsigned_integer (buf, 4, byte_order);
188
189 return magic;
190 }
191
192 /* Given CACHE, use the trad_frame* functions to restore the FPSIMD
193 registers from a signal frame.
194
195 VREG_NUM is the number of the V register being restored, OFFSET is the
196 address containing the register value, BYTE_ORDER is the endianness and
197 HAS_SVE tells us if we have a valid SVE context or not. */
198
199 static void
200 aarch64_linux_restore_vreg (struct trad_frame_cache *cache, int num_regs,
201 int vreg_num, CORE_ADDR offset,
202 enum bfd_endian byte_order, bool has_sve)
203 {
204 /* WARNING: SIMD state is laid out in memory in target-endian format.
205
206 So we have a couple cases to consider:
207
208 1 - If the target is big endian, then SIMD state is big endian,
209 requiring a byteswap.
210
211 2 - If the target is little endian, then SIMD state is little endian, so
212 no byteswap is needed. */
213
214 if (byte_order == BFD_ENDIAN_BIG)
215 {
216 gdb_byte buf[V_REGISTER_SIZE];
217
218 if (target_read_memory (offset, buf, V_REGISTER_SIZE) != 0)
219 {
220 size_t size = V_REGISTER_SIZE/2;
221
222 /* Read the two halves of the V register in reverse byte order. */
223 CORE_ADDR u64 = extract_unsigned_integer (buf, size,
224 byte_order);
225 CORE_ADDR l64 = extract_unsigned_integer (buf + size, size,
226 byte_order);
227
228 /* Copy the reversed bytes to the buffer. */
229 store_unsigned_integer (buf, size, BFD_ENDIAN_LITTLE, l64);
230 store_unsigned_integer (buf + size , size, BFD_ENDIAN_LITTLE, u64);
231
232 /* Now we can store the correct bytes for the V register. */
233 trad_frame_set_reg_value_bytes (cache, AARCH64_V0_REGNUM + vreg_num,
234 {buf, V_REGISTER_SIZE});
235 trad_frame_set_reg_value_bytes (cache,
236 num_regs + AARCH64_Q0_REGNUM
237 + vreg_num, {buf, Q_REGISTER_SIZE});
238 trad_frame_set_reg_value_bytes (cache,
239 num_regs + AARCH64_D0_REGNUM
240 + vreg_num, {buf, D_REGISTER_SIZE});
241 trad_frame_set_reg_value_bytes (cache,
242 num_regs + AARCH64_S0_REGNUM
243 + vreg_num, {buf, S_REGISTER_SIZE});
244 trad_frame_set_reg_value_bytes (cache,
245 num_regs + AARCH64_H0_REGNUM
246 + vreg_num, {buf, H_REGISTER_SIZE});
247 trad_frame_set_reg_value_bytes (cache,
248 num_regs + AARCH64_B0_REGNUM
249 + vreg_num, {buf, B_REGISTER_SIZE});
250
251 if (has_sve)
252 trad_frame_set_reg_value_bytes (cache,
253 num_regs + AARCH64_SVE_V0_REGNUM
254 + vreg_num, {buf, V_REGISTER_SIZE});
255 }
256 return;
257 }
258
259 /* Little endian, just point at the address containing the register
260 value. */
261 trad_frame_set_reg_addr (cache, AARCH64_V0_REGNUM + vreg_num, offset);
262 trad_frame_set_reg_addr (cache, num_regs + AARCH64_Q0_REGNUM + vreg_num,
263 offset);
264 trad_frame_set_reg_addr (cache, num_regs + AARCH64_D0_REGNUM + vreg_num,
265 offset);
266 trad_frame_set_reg_addr (cache, num_regs + AARCH64_S0_REGNUM + vreg_num,
267 offset);
268 trad_frame_set_reg_addr (cache, num_regs + AARCH64_H0_REGNUM + vreg_num,
269 offset);
270 trad_frame_set_reg_addr (cache, num_regs + AARCH64_B0_REGNUM + vreg_num,
271 offset);
272
273 if (has_sve)
274 trad_frame_set_reg_addr (cache, num_regs + AARCH64_SVE_V0_REGNUM
275 + vreg_num, offset);
276
277 }
278
279 /* Implement the "init" method of struct tramp_frame. */
280
281 static void
282 aarch64_linux_sigframe_init (const struct tramp_frame *self,
283 struct frame_info *this_frame,
284 struct trad_frame_cache *this_cache,
285 CORE_ADDR func)
286 {
287 struct gdbarch *gdbarch = get_frame_arch (this_frame);
288 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
289 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
290 CORE_ADDR sp = get_frame_register_unsigned (this_frame, AARCH64_SP_REGNUM);
291 CORE_ADDR sigcontext_addr = (sp + AARCH64_RT_SIGFRAME_UCONTEXT_OFFSET
292 + AARCH64_UCONTEXT_SIGCONTEXT_OFFSET );
293 CORE_ADDR section = sigcontext_addr + AARCH64_SIGCONTEXT_RESERVED_OFFSET;
294 CORE_ADDR section_end = section + AARCH64_SIGCONTEXT_RESERVED_SIZE;
295 CORE_ADDR fpsimd = 0;
296 CORE_ADDR sve_regs = 0;
297 uint32_t size, magic;
298 bool extra_found = false;
299 int num_regs = gdbarch_num_regs (gdbarch);
300
301 /* Read in the integer registers. */
302
303 for (int i = 0; i < 31; i++)
304 {
305 trad_frame_set_reg_addr (this_cache,
306 AARCH64_X0_REGNUM + i,
307 sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
308 + i * AARCH64_SIGCONTEXT_REG_SIZE);
309 }
310 trad_frame_set_reg_addr (this_cache, AARCH64_SP_REGNUM,
311 sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
312 + 31 * AARCH64_SIGCONTEXT_REG_SIZE);
313 trad_frame_set_reg_addr (this_cache, AARCH64_PC_REGNUM,
314 sigcontext_addr + AARCH64_SIGCONTEXT_XO_OFFSET
315 + 32 * AARCH64_SIGCONTEXT_REG_SIZE);
316
317 /* Search for the FP and SVE sections, stopping at null. */
318 while ((magic = read_aarch64_ctx (section, byte_order, &size)) != 0
319 && size != 0)
320 {
321 switch (magic)
322 {
323 case AARCH64_FPSIMD_MAGIC:
324 fpsimd = section;
325 section += size;
326 break;
327
328 case AARCH64_SVE_MAGIC:
329 {
330 /* Check if the section is followed by a full SVE dump, and set
331 sve_regs if it is. */
332 gdb_byte buf[4];
333 uint16_t vq;
334
335 if (!tdep->has_sve ())
336 break;
337
338 if (target_read_memory (section + AARCH64_SVE_CONTEXT_VL_OFFSET,
339 buf, 2) != 0)
340 {
341 section += size;
342 break;
343 }
344 vq = sve_vq_from_vl (extract_unsigned_integer (buf, 2, byte_order));
345
346 if (vq != tdep->vq)
347 error (_("Invalid vector length in signal frame %d vs %s."), vq,
348 pulongest (tdep->vq));
349
350 if (size >= AARCH64_SVE_CONTEXT_SIZE (vq))
351 sve_regs = section + AARCH64_SVE_CONTEXT_REGS_OFFSET;
352
353 section += size;
354 break;
355 }
356
357 case AARCH64_EXTRA_MAGIC:
358 {
359 /* Extra is always the last valid section in reserved and points to
360 an additional block of memory filled with more sections. Reset
361 the address to the extra section and continue looking for more
362 structures. */
363 gdb_byte buf[8];
364
365 if (target_read_memory (section + AARCH64_EXTRA_DATAP_OFFSET,
366 buf, 8) != 0)
367 {
368 section += size;
369 break;
370 }
371
372 section = extract_unsigned_integer (buf, 8, byte_order);
373 extra_found = true;
374 break;
375 }
376
377 default:
378 section += size;
379 break;
380 }
381
382 /* Prevent searching past the end of the reserved section. The extra
383 section does not have a hard coded limit - we have to rely on it ending
384 with nulls. */
385 if (!extra_found && section > section_end)
386 break;
387 }
388
389 if (sve_regs != 0)
390 {
391 CORE_ADDR offset;
392
393 for (int i = 0; i < 32; i++)
394 {
395 offset = sve_regs + (i * tdep->vq * 16);
396 trad_frame_set_reg_addr (this_cache, AARCH64_SVE_Z0_REGNUM + i,
397 offset);
398 trad_frame_set_reg_addr (this_cache,
399 num_regs + AARCH64_SVE_V0_REGNUM + i,
400 offset);
401 trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_Q0_REGNUM + i,
402 offset);
403 trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_D0_REGNUM + i,
404 offset);
405 trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_S0_REGNUM + i,
406 offset);
407 trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_H0_REGNUM + i,
408 offset);
409 trad_frame_set_reg_addr (this_cache, num_regs + AARCH64_B0_REGNUM + i,
410 offset);
411 }
412
413 offset = sve_regs + AARCH64_SVE_CONTEXT_P_REGS_OFFSET (tdep->vq);
414 for (int i = 0; i < 16; i++)
415 trad_frame_set_reg_addr (this_cache, AARCH64_SVE_P0_REGNUM + i,
416 offset + (i * tdep->vq * 2));
417
418 offset = sve_regs + AARCH64_SVE_CONTEXT_FFR_OFFSET (tdep->vq);
419 trad_frame_set_reg_addr (this_cache, AARCH64_SVE_FFR_REGNUM, offset);
420 }
421
422 if (fpsimd != 0)
423 {
424 trad_frame_set_reg_addr (this_cache, AARCH64_FPSR_REGNUM,
425 fpsimd + AARCH64_FPSIMD_FPSR_OFFSET);
426 trad_frame_set_reg_addr (this_cache, AARCH64_FPCR_REGNUM,
427 fpsimd + AARCH64_FPSIMD_FPCR_OFFSET);
428
429 /* If there was no SVE section then set up the V registers. */
430 if (sve_regs == 0)
431 {
432 for (int i = 0; i < 32; i++)
433 {
434 CORE_ADDR offset = (fpsimd + AARCH64_FPSIMD_V0_OFFSET
435 + (i * AARCH64_FPSIMD_VREG_SIZE));
436
437 aarch64_linux_restore_vreg (this_cache, num_regs, i, offset,
438 byte_order, tdep->has_sve ());
439 }
440 }
441 }
442
443 trad_frame_set_id (this_cache, frame_id_build (sp, func));
444 }
445
446 static const struct tramp_frame aarch64_linux_rt_sigframe =
447 {
448 SIGTRAMP_FRAME,
449 4,
450 {
451 /* movz x8, 0x8b (S=1,o=10,h=0,i=0x8b,r=8)
452 Soo1 0010 1hhi iiii iiii iiii iiir rrrr */
453 {0xd2801168, ULONGEST_MAX},
454
455 /* svc 0x0 (o=0, l=1)
456 1101 0100 oooi iiii iiii iiii iii0 00ll */
457 {0xd4000001, ULONGEST_MAX},
458 {TRAMP_SENTINEL_INSN, ULONGEST_MAX}
459 },
460 aarch64_linux_sigframe_init
461 };
462
463 /* Register maps. */
464
465 static const struct regcache_map_entry aarch64_linux_gregmap[] =
466 {
467 { 31, AARCH64_X0_REGNUM, 8 }, /* x0 ... x30 */
468 { 1, AARCH64_SP_REGNUM, 8 },
469 { 1, AARCH64_PC_REGNUM, 8 },
470 { 1, AARCH64_CPSR_REGNUM, 8 },
471 { 0 }
472 };
473
474 static const struct regcache_map_entry aarch64_linux_fpregmap[] =
475 {
476 { 32, AARCH64_V0_REGNUM, 16 }, /* v0 ... v31 */
477 { 1, AARCH64_FPSR_REGNUM, 4 },
478 { 1, AARCH64_FPCR_REGNUM, 4 },
479 { 0 }
480 };
481
482 /* Register set definitions. */
483
484 const struct regset aarch64_linux_gregset =
485 {
486 aarch64_linux_gregmap,
487 regcache_supply_regset, regcache_collect_regset
488 };
489
490 const struct regset aarch64_linux_fpregset =
491 {
492 aarch64_linux_fpregmap,
493 regcache_supply_regset, regcache_collect_regset
494 };
495
496 /* The fields in an SVE header at the start of a SVE regset. */
497
498 #define SVE_HEADER_SIZE_LENGTH 4
499 #define SVE_HEADER_MAX_SIZE_LENGTH 4
500 #define SVE_HEADER_VL_LENGTH 2
501 #define SVE_HEADER_MAX_VL_LENGTH 2
502 #define SVE_HEADER_FLAGS_LENGTH 2
503 #define SVE_HEADER_RESERVED_LENGTH 2
504
505 #define SVE_HEADER_SIZE_OFFSET 0
506 #define SVE_HEADER_MAX_SIZE_OFFSET \
507 (SVE_HEADER_SIZE_OFFSET + SVE_HEADER_SIZE_LENGTH)
508 #define SVE_HEADER_VL_OFFSET \
509 (SVE_HEADER_MAX_SIZE_OFFSET + SVE_HEADER_MAX_SIZE_LENGTH)
510 #define SVE_HEADER_MAX_VL_OFFSET \
511 (SVE_HEADER_VL_OFFSET + SVE_HEADER_VL_LENGTH)
512 #define SVE_HEADER_FLAGS_OFFSET \
513 (SVE_HEADER_MAX_VL_OFFSET + SVE_HEADER_MAX_VL_LENGTH)
514 #define SVE_HEADER_RESERVED_OFFSET \
515 (SVE_HEADER_FLAGS_OFFSET + SVE_HEADER_FLAGS_LENGTH)
516 #define SVE_HEADER_SIZE \
517 (SVE_HEADER_RESERVED_OFFSET + SVE_HEADER_RESERVED_LENGTH)
518
519 #define SVE_HEADER_FLAG_SVE 1
520
521 /* Get VQ value from SVE section in the core dump. */
522
523 static uint64_t
524 aarch64_linux_core_read_vq (struct gdbarch *gdbarch, bfd *abfd)
525 {
526 gdb_byte header[SVE_HEADER_SIZE];
527 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
528 asection *sve_section = bfd_get_section_by_name (abfd, ".reg-aarch-sve");
529
530 if (sve_section == nullptr)
531 {
532 /* No SVE state. */
533 return 0;
534 }
535
536 size_t size = bfd_section_size (sve_section);
537
538 /* Check extended state size. */
539 if (size < SVE_HEADER_SIZE)
540 {
541 warning (_("'.reg-aarch-sve' section in core file too small."));
542 return 0;
543 }
544
545 if (!bfd_get_section_contents (abfd, sve_section, header, 0, SVE_HEADER_SIZE))
546 {
547 warning (_("Couldn't read sve header from "
548 "'.reg-aarch-sve' section in core file."));
549 return 0;
550 }
551
552 uint64_t vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
553 SVE_HEADER_VL_LENGTH, byte_order);
554 uint64_t vq = sve_vq_from_vl (vl);
555
556 if (vq > AARCH64_MAX_SVE_VQ)
557 {
558 warning (_("SVE Vector length in core file not supported by this version"
559 " of GDB. (VQ=%s)"), pulongest (vq));
560 return 0;
561 }
562 else if (vq == 0)
563 {
564 warning (_("SVE Vector length in core file is invalid. (VQ=%s"),
565 pulongest (vq));
566 return 0;
567 }
568
569 return vq;
570 }
571
572 /* Supply register REGNUM from BUF to REGCACHE, using the register map
573 in REGSET. If REGNUM is -1, do this for all registers in REGSET.
574 If BUF is NULL, set the registers to "unavailable" status. */
575
576 static void
577 aarch64_linux_supply_sve_regset (const struct regset *regset,
578 struct regcache *regcache,
579 int regnum, const void *buf, size_t size)
580 {
581 gdb_byte *header = (gdb_byte *) buf;
582 struct gdbarch *gdbarch = regcache->arch ();
583 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
584
585 if (buf == nullptr)
586 return regcache->supply_regset (regset, regnum, nullptr, size);
587 gdb_assert (size > SVE_HEADER_SIZE);
588
589 /* BUF contains an SVE header followed by a register dump of either the
590 passed in SVE regset or a NEON fpregset. */
591
592 /* Extract required fields from the header. */
593 ULONGEST vl = extract_unsigned_integer (header + SVE_HEADER_VL_OFFSET,
594 SVE_HEADER_VL_LENGTH, byte_order);
595 uint16_t flags = extract_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
596 SVE_HEADER_FLAGS_LENGTH,
597 byte_order);
598
599 if (regnum == -1 || regnum == AARCH64_SVE_VG_REGNUM)
600 {
601 gdb_byte vg_target[8];
602 store_integer ((gdb_byte *)&vg_target, sizeof (uint64_t), byte_order,
603 sve_vg_from_vl (vl));
604 regcache->raw_supply (AARCH64_SVE_VG_REGNUM, &vg_target);
605 }
606
607 if (flags & SVE_HEADER_FLAG_SVE)
608 {
609 /* Register dump is a SVE structure. */
610 regcache->supply_regset (regset, regnum,
611 (gdb_byte *) buf + SVE_HEADER_SIZE,
612 size - SVE_HEADER_SIZE);
613 }
614 else
615 {
616 /* Register dump is a fpsimd structure. First clear the SVE
617 registers. */
618 for (int i = 0; i < AARCH64_SVE_Z_REGS_NUM; i++)
619 regcache->raw_supply_zeroed (AARCH64_SVE_Z0_REGNUM + i);
620 for (int i = 0; i < AARCH64_SVE_P_REGS_NUM; i++)
621 regcache->raw_supply_zeroed (AARCH64_SVE_P0_REGNUM + i);
622 regcache->raw_supply_zeroed (AARCH64_SVE_FFR_REGNUM);
623
624 /* Then supply the fpsimd registers. */
625 regcache->supply_regset (&aarch64_linux_fpregset, regnum,
626 (gdb_byte *) buf + SVE_HEADER_SIZE,
627 size - SVE_HEADER_SIZE);
628 }
629 }
630
631 /* Collect register REGNUM from REGCACHE to BUF, using the register
632 map in REGSET. If REGNUM is -1, do this for all registers in
633 REGSET. */
634
635 static void
636 aarch64_linux_collect_sve_regset (const struct regset *regset,
637 const struct regcache *regcache,
638 int regnum, void *buf, size_t size)
639 {
640 gdb_byte *header = (gdb_byte *) buf;
641 struct gdbarch *gdbarch = regcache->arch ();
642 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
643 uint64_t vq = gdbarch_tdep (gdbarch)->vq;
644
645 gdb_assert (buf != NULL);
646 gdb_assert (size > SVE_HEADER_SIZE);
647
648 /* BUF starts with a SVE header prior to the register dump. */
649
650 store_unsigned_integer (header + SVE_HEADER_SIZE_OFFSET,
651 SVE_HEADER_SIZE_LENGTH, byte_order, size);
652 store_unsigned_integer (header + SVE_HEADER_MAX_SIZE_OFFSET,
653 SVE_HEADER_MAX_SIZE_LENGTH, byte_order, size);
654 store_unsigned_integer (header + SVE_HEADER_VL_OFFSET, SVE_HEADER_VL_LENGTH,
655 byte_order, sve_vl_from_vq (vq));
656 store_unsigned_integer (header + SVE_HEADER_MAX_VL_OFFSET,
657 SVE_HEADER_MAX_VL_LENGTH, byte_order,
658 sve_vl_from_vq (vq));
659 store_unsigned_integer (header + SVE_HEADER_FLAGS_OFFSET,
660 SVE_HEADER_FLAGS_LENGTH, byte_order,
661 SVE_HEADER_FLAG_SVE);
662 store_unsigned_integer (header + SVE_HEADER_RESERVED_OFFSET,
663 SVE_HEADER_RESERVED_LENGTH, byte_order, 0);
664
665 /* The SVE register dump follows. */
666 regcache->collect_regset (regset, regnum, (gdb_byte *) buf + SVE_HEADER_SIZE,
667 size - SVE_HEADER_SIZE);
668 }
669
670 /* Implement the "iterate_over_regset_sections" gdbarch method. */
671
672 static void
673 aarch64_linux_iterate_over_regset_sections (struct gdbarch *gdbarch,
674 iterate_over_regset_sections_cb *cb,
675 void *cb_data,
676 const struct regcache *regcache)
677 {
678 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
679
680 cb (".reg", AARCH64_LINUX_SIZEOF_GREGSET, AARCH64_LINUX_SIZEOF_GREGSET,
681 &aarch64_linux_gregset, NULL, cb_data);
682
683 if (tdep->has_sve ())
684 {
685 /* Create this on the fly in order to handle vector register sizes. */
686 const struct regcache_map_entry sve_regmap[] =
687 {
688 { 32, AARCH64_SVE_Z0_REGNUM, (int) (tdep->vq * 16) },
689 { 16, AARCH64_SVE_P0_REGNUM, (int) (tdep->vq * 16 / 8) },
690 { 1, AARCH64_SVE_FFR_REGNUM, (int) (tdep->vq * 16 / 8) },
691 { 1, AARCH64_FPSR_REGNUM, 4 },
692 { 1, AARCH64_FPCR_REGNUM, 4 },
693 { 0 }
694 };
695
696 const struct regset aarch64_linux_sve_regset =
697 {
698 sve_regmap,
699 aarch64_linux_supply_sve_regset, aarch64_linux_collect_sve_regset,
700 REGSET_VARIABLE_SIZE
701 };
702
703 cb (".reg-aarch-sve",
704 SVE_HEADER_SIZE + regcache_map_entry_size (aarch64_linux_fpregmap),
705 SVE_HEADER_SIZE + regcache_map_entry_size (sve_regmap),
706 &aarch64_linux_sve_regset, "SVE registers", cb_data);
707 }
708 else
709 cb (".reg2", AARCH64_LINUX_SIZEOF_FPREGSET, AARCH64_LINUX_SIZEOF_FPREGSET,
710 &aarch64_linux_fpregset, NULL, cb_data);
711
712
713 if (tdep->has_pauth ())
714 {
715 /* Create this on the fly in order to handle the variable location. */
716 const struct regcache_map_entry pauth_regmap[] =
717 {
718 { 2, AARCH64_PAUTH_DMASK_REGNUM (tdep->pauth_reg_base), 8},
719 { 0 }
720 };
721
722 const struct regset aarch64_linux_pauth_regset =
723 {
724 pauth_regmap, regcache_supply_regset, regcache_collect_regset
725 };
726
727 cb (".reg-aarch-pauth", AARCH64_LINUX_SIZEOF_PAUTH,
728 AARCH64_LINUX_SIZEOF_PAUTH, &aarch64_linux_pauth_regset,
729 "pauth registers", cb_data);
730 }
731
732 /* Handle MTE registers. */
733 if (tdep->has_mte ())
734 {
735 /* Create this on the fly in order to handle the variable location. */
736 const struct regcache_map_entry mte_regmap[] =
737 {
738 { 1, tdep->mte_reg_base, 8},
739 { 0 }
740 };
741
742 const struct regset aarch64_linux_mte_regset =
743 {
744 mte_regmap, regcache_supply_regset, regcache_collect_regset
745 };
746
747 cb (".reg-aarch-mte", AARCH64_LINUX_SIZEOF_MTE_REGSET,
748 AARCH64_LINUX_SIZEOF_MTE_REGSET, &aarch64_linux_mte_regset,
749 "MTE registers", cb_data);
750 }
751 }
752
753 /* Implement the "core_read_description" gdbarch method. */
754
755 static const struct target_desc *
756 aarch64_linux_core_read_description (struct gdbarch *gdbarch,
757 struct target_ops *target, bfd *abfd)
758 {
759 CORE_ADDR hwcap = linux_get_hwcap (target);
760 CORE_ADDR hwcap2 = linux_get_hwcap2 (target);
761
762 bool pauth_p = hwcap & AARCH64_HWCAP_PACA;
763 bool mte_p = hwcap2 & HWCAP2_MTE;
764 return aarch64_read_description (aarch64_linux_core_read_vq (gdbarch, abfd),
765 pauth_p, mte_p);
766 }
767
768 /* Implementation of `gdbarch_stap_is_single_operand', as defined in
769 gdbarch.h. */
770
771 static int
772 aarch64_stap_is_single_operand (struct gdbarch *gdbarch, const char *s)
773 {
774 return (*s == '#' || isdigit (*s) /* Literal number. */
775 || *s == '[' /* Register indirection. */
776 || isalpha (*s)); /* Register value. */
777 }
778
779 /* This routine is used to parse a special token in AArch64's assembly.
780
781 The special tokens parsed by it are:
782
783 - Register displacement (e.g, [fp, #-8])
784
785 It returns one if the special token has been parsed successfully,
786 or zero if the current token is not considered special. */
787
788 static expr::operation_up
789 aarch64_stap_parse_special_token (struct gdbarch *gdbarch,
790 struct stap_parse_info *p)
791 {
792 if (*p->arg == '[')
793 {
794 /* Temporary holder for lookahead. */
795 const char *tmp = p->arg;
796 char *endp;
797 /* Used to save the register name. */
798 const char *start;
799 int len;
800 int got_minus = 0;
801 long displacement;
802
803 ++tmp;
804 start = tmp;
805
806 /* Register name. */
807 while (isalnum (*tmp))
808 ++tmp;
809
810 if (*tmp != ',')
811 return {};
812
813 len = tmp - start;
814 std::string regname (start, len);
815
816 if (user_reg_map_name_to_regnum (gdbarch, regname.c_str (), len) == -1)
817 error (_("Invalid register name `%s' on expression `%s'."),
818 regname.c_str (), p->saved_arg);
819
820 ++tmp;
821 tmp = skip_spaces (tmp);
822 /* Now we expect a number. It can begin with '#' or simply
823 a digit. */
824 if (*tmp == '#')
825 ++tmp;
826
827 if (*tmp == '-')
828 {
829 ++tmp;
830 got_minus = 1;
831 }
832 else if (*tmp == '+')
833 ++tmp;
834
835 if (!isdigit (*tmp))
836 return {};
837
838 displacement = strtol (tmp, &endp, 10);
839 tmp = endp;
840
841 /* Skipping last `]'. */
842 if (*tmp++ != ']')
843 return {};
844 p->arg = tmp;
845
846 using namespace expr;
847
848 /* The displacement. */
849 struct type *long_type = builtin_type (gdbarch)->builtin_long;
850 if (got_minus)
851 displacement = -displacement;
852 operation_up disp = make_operation<long_const_operation> (long_type,
853 displacement);
854
855 /* The register name. */
856 operation_up reg
857 = make_operation<register_operation> (std::move (regname));
858
859 operation_up sum
860 = make_operation<add_operation> (std::move (reg), std::move (disp));
861
862 /* Casting to the expected type. */
863 struct type *arg_ptr_type = lookup_pointer_type (p->arg_type);
864 sum = make_operation<unop_cast_operation> (std::move (sum),
865 arg_ptr_type);
866 return make_operation<unop_ind_operation> (std::move (sum));
867 }
868 return {};
869 }
870
871 /* AArch64 process record-replay constructs: syscall, signal etc. */
872
873 static linux_record_tdep aarch64_linux_record_tdep;
874
875 /* Enum that defines the AArch64 linux specific syscall identifiers used for
876 process record/replay. */
877
878 enum aarch64_syscall {
879 aarch64_sys_io_setup = 0,
880 aarch64_sys_io_destroy = 1,
881 aarch64_sys_io_submit = 2,
882 aarch64_sys_io_cancel = 3,
883 aarch64_sys_io_getevents = 4,
884 aarch64_sys_setxattr = 5,
885 aarch64_sys_lsetxattr = 6,
886 aarch64_sys_fsetxattr = 7,
887 aarch64_sys_getxattr = 8,
888 aarch64_sys_lgetxattr = 9,
889 aarch64_sys_fgetxattr = 10,
890 aarch64_sys_listxattr = 11,
891 aarch64_sys_llistxattr = 12,
892 aarch64_sys_flistxattr = 13,
893 aarch64_sys_removexattr = 14,
894 aarch64_sys_lremovexattr = 15,
895 aarch64_sys_fremovexattr = 16,
896 aarch64_sys_getcwd = 17,
897 aarch64_sys_lookup_dcookie = 18,
898 aarch64_sys_eventfd2 = 19,
899 aarch64_sys_epoll_create1 = 20,
900 aarch64_sys_epoll_ctl = 21,
901 aarch64_sys_epoll_pwait = 22,
902 aarch64_sys_dup = 23,
903 aarch64_sys_dup3 = 24,
904 aarch64_sys_fcntl = 25,
905 aarch64_sys_inotify_init1 = 26,
906 aarch64_sys_inotify_add_watch = 27,
907 aarch64_sys_inotify_rm_watch = 28,
908 aarch64_sys_ioctl = 29,
909 aarch64_sys_ioprio_set = 30,
910 aarch64_sys_ioprio_get = 31,
911 aarch64_sys_flock = 32,
912 aarch64_sys_mknodat = 33,
913 aarch64_sys_mkdirat = 34,
914 aarch64_sys_unlinkat = 35,
915 aarch64_sys_symlinkat = 36,
916 aarch64_sys_linkat = 37,
917 aarch64_sys_renameat = 38,
918 aarch64_sys_umount2 = 39,
919 aarch64_sys_mount = 40,
920 aarch64_sys_pivot_root = 41,
921 aarch64_sys_nfsservctl = 42,
922 aarch64_sys_statfs = 43,
923 aarch64_sys_fstatfs = 44,
924 aarch64_sys_truncate = 45,
925 aarch64_sys_ftruncate = 46,
926 aarch64_sys_fallocate = 47,
927 aarch64_sys_faccessat = 48,
928 aarch64_sys_chdir = 49,
929 aarch64_sys_fchdir = 50,
930 aarch64_sys_chroot = 51,
931 aarch64_sys_fchmod = 52,
932 aarch64_sys_fchmodat = 53,
933 aarch64_sys_fchownat = 54,
934 aarch64_sys_fchown = 55,
935 aarch64_sys_openat = 56,
936 aarch64_sys_close = 57,
937 aarch64_sys_vhangup = 58,
938 aarch64_sys_pipe2 = 59,
939 aarch64_sys_quotactl = 60,
940 aarch64_sys_getdents64 = 61,
941 aarch64_sys_lseek = 62,
942 aarch64_sys_read = 63,
943 aarch64_sys_write = 64,
944 aarch64_sys_readv = 65,
945 aarch64_sys_writev = 66,
946 aarch64_sys_pread64 = 67,
947 aarch64_sys_pwrite64 = 68,
948 aarch64_sys_preadv = 69,
949 aarch64_sys_pwritev = 70,
950 aarch64_sys_sendfile = 71,
951 aarch64_sys_pselect6 = 72,
952 aarch64_sys_ppoll = 73,
953 aarch64_sys_signalfd4 = 74,
954 aarch64_sys_vmsplice = 75,
955 aarch64_sys_splice = 76,
956 aarch64_sys_tee = 77,
957 aarch64_sys_readlinkat = 78,
958 aarch64_sys_newfstatat = 79,
959 aarch64_sys_fstat = 80,
960 aarch64_sys_sync = 81,
961 aarch64_sys_fsync = 82,
962 aarch64_sys_fdatasync = 83,
963 aarch64_sys_sync_file_range2 = 84,
964 aarch64_sys_sync_file_range = 84,
965 aarch64_sys_timerfd_create = 85,
966 aarch64_sys_timerfd_settime = 86,
967 aarch64_sys_timerfd_gettime = 87,
968 aarch64_sys_utimensat = 88,
969 aarch64_sys_acct = 89,
970 aarch64_sys_capget = 90,
971 aarch64_sys_capset = 91,
972 aarch64_sys_personality = 92,
973 aarch64_sys_exit = 93,
974 aarch64_sys_exit_group = 94,
975 aarch64_sys_waitid = 95,
976 aarch64_sys_set_tid_address = 96,
977 aarch64_sys_unshare = 97,
978 aarch64_sys_futex = 98,
979 aarch64_sys_set_robust_list = 99,
980 aarch64_sys_get_robust_list = 100,
981 aarch64_sys_nanosleep = 101,
982 aarch64_sys_getitimer = 102,
983 aarch64_sys_setitimer = 103,
984 aarch64_sys_kexec_load = 104,
985 aarch64_sys_init_module = 105,
986 aarch64_sys_delete_module = 106,
987 aarch64_sys_timer_create = 107,
988 aarch64_sys_timer_gettime = 108,
989 aarch64_sys_timer_getoverrun = 109,
990 aarch64_sys_timer_settime = 110,
991 aarch64_sys_timer_delete = 111,
992 aarch64_sys_clock_settime = 112,
993 aarch64_sys_clock_gettime = 113,
994 aarch64_sys_clock_getres = 114,
995 aarch64_sys_clock_nanosleep = 115,
996 aarch64_sys_syslog = 116,
997 aarch64_sys_ptrace = 117,
998 aarch64_sys_sched_setparam = 118,
999 aarch64_sys_sched_setscheduler = 119,
1000 aarch64_sys_sched_getscheduler = 120,
1001 aarch64_sys_sched_getparam = 121,
1002 aarch64_sys_sched_setaffinity = 122,
1003 aarch64_sys_sched_getaffinity = 123,
1004 aarch64_sys_sched_yield = 124,
1005 aarch64_sys_sched_get_priority_max = 125,
1006 aarch64_sys_sched_get_priority_min = 126,
1007 aarch64_sys_sched_rr_get_interval = 127,
1008 aarch64_sys_kill = 129,
1009 aarch64_sys_tkill = 130,
1010 aarch64_sys_tgkill = 131,
1011 aarch64_sys_sigaltstack = 132,
1012 aarch64_sys_rt_sigsuspend = 133,
1013 aarch64_sys_rt_sigaction = 134,
1014 aarch64_sys_rt_sigprocmask = 135,
1015 aarch64_sys_rt_sigpending = 136,
1016 aarch64_sys_rt_sigtimedwait = 137,
1017 aarch64_sys_rt_sigqueueinfo = 138,
1018 aarch64_sys_rt_sigreturn = 139,
1019 aarch64_sys_setpriority = 140,
1020 aarch64_sys_getpriority = 141,
1021 aarch64_sys_reboot = 142,
1022 aarch64_sys_setregid = 143,
1023 aarch64_sys_setgid = 144,
1024 aarch64_sys_setreuid = 145,
1025 aarch64_sys_setuid = 146,
1026 aarch64_sys_setresuid = 147,
1027 aarch64_sys_getresuid = 148,
1028 aarch64_sys_setresgid = 149,
1029 aarch64_sys_getresgid = 150,
1030 aarch64_sys_setfsuid = 151,
1031 aarch64_sys_setfsgid = 152,
1032 aarch64_sys_times = 153,
1033 aarch64_sys_setpgid = 154,
1034 aarch64_sys_getpgid = 155,
1035 aarch64_sys_getsid = 156,
1036 aarch64_sys_setsid = 157,
1037 aarch64_sys_getgroups = 158,
1038 aarch64_sys_setgroups = 159,
1039 aarch64_sys_uname = 160,
1040 aarch64_sys_sethostname = 161,
1041 aarch64_sys_setdomainname = 162,
1042 aarch64_sys_getrlimit = 163,
1043 aarch64_sys_setrlimit = 164,
1044 aarch64_sys_getrusage = 165,
1045 aarch64_sys_umask = 166,
1046 aarch64_sys_prctl = 167,
1047 aarch64_sys_getcpu = 168,
1048 aarch64_sys_gettimeofday = 169,
1049 aarch64_sys_settimeofday = 170,
1050 aarch64_sys_adjtimex = 171,
1051 aarch64_sys_getpid = 172,
1052 aarch64_sys_getppid = 173,
1053 aarch64_sys_getuid = 174,
1054 aarch64_sys_geteuid = 175,
1055 aarch64_sys_getgid = 176,
1056 aarch64_sys_getegid = 177,
1057 aarch64_sys_gettid = 178,
1058 aarch64_sys_sysinfo = 179,
1059 aarch64_sys_mq_open = 180,
1060 aarch64_sys_mq_unlink = 181,
1061 aarch64_sys_mq_timedsend = 182,
1062 aarch64_sys_mq_timedreceive = 183,
1063 aarch64_sys_mq_notify = 184,
1064 aarch64_sys_mq_getsetattr = 185,
1065 aarch64_sys_msgget = 186,
1066 aarch64_sys_msgctl = 187,
1067 aarch64_sys_msgrcv = 188,
1068 aarch64_sys_msgsnd = 189,
1069 aarch64_sys_semget = 190,
1070 aarch64_sys_semctl = 191,
1071 aarch64_sys_semtimedop = 192,
1072 aarch64_sys_semop = 193,
1073 aarch64_sys_shmget = 194,
1074 aarch64_sys_shmctl = 195,
1075 aarch64_sys_shmat = 196,
1076 aarch64_sys_shmdt = 197,
1077 aarch64_sys_socket = 198,
1078 aarch64_sys_socketpair = 199,
1079 aarch64_sys_bind = 200,
1080 aarch64_sys_listen = 201,
1081 aarch64_sys_accept = 202,
1082 aarch64_sys_connect = 203,
1083 aarch64_sys_getsockname = 204,
1084 aarch64_sys_getpeername = 205,
1085 aarch64_sys_sendto = 206,
1086 aarch64_sys_recvfrom = 207,
1087 aarch64_sys_setsockopt = 208,
1088 aarch64_sys_getsockopt = 209,
1089 aarch64_sys_shutdown = 210,
1090 aarch64_sys_sendmsg = 211,
1091 aarch64_sys_recvmsg = 212,
1092 aarch64_sys_readahead = 213,
1093 aarch64_sys_brk = 214,
1094 aarch64_sys_munmap = 215,
1095 aarch64_sys_mremap = 216,
1096 aarch64_sys_add_key = 217,
1097 aarch64_sys_request_key = 218,
1098 aarch64_sys_keyctl = 219,
1099 aarch64_sys_clone = 220,
1100 aarch64_sys_execve = 221,
1101 aarch64_sys_mmap = 222,
1102 aarch64_sys_fadvise64 = 223,
1103 aarch64_sys_swapon = 224,
1104 aarch64_sys_swapoff = 225,
1105 aarch64_sys_mprotect = 226,
1106 aarch64_sys_msync = 227,
1107 aarch64_sys_mlock = 228,
1108 aarch64_sys_munlock = 229,
1109 aarch64_sys_mlockall = 230,
1110 aarch64_sys_munlockall = 231,
1111 aarch64_sys_mincore = 232,
1112 aarch64_sys_madvise = 233,
1113 aarch64_sys_remap_file_pages = 234,
1114 aarch64_sys_mbind = 235,
1115 aarch64_sys_get_mempolicy = 236,
1116 aarch64_sys_set_mempolicy = 237,
1117 aarch64_sys_migrate_pages = 238,
1118 aarch64_sys_move_pages = 239,
1119 aarch64_sys_rt_tgsigqueueinfo = 240,
1120 aarch64_sys_perf_event_open = 241,
1121 aarch64_sys_accept4 = 242,
1122 aarch64_sys_recvmmsg = 243,
1123 aarch64_sys_wait4 = 260,
1124 aarch64_sys_prlimit64 = 261,
1125 aarch64_sys_fanotify_init = 262,
1126 aarch64_sys_fanotify_mark = 263,
1127 aarch64_sys_name_to_handle_at = 264,
1128 aarch64_sys_open_by_handle_at = 265,
1129 aarch64_sys_clock_adjtime = 266,
1130 aarch64_sys_syncfs = 267,
1131 aarch64_sys_setns = 268,
1132 aarch64_sys_sendmmsg = 269,
1133 aarch64_sys_process_vm_readv = 270,
1134 aarch64_sys_process_vm_writev = 271,
1135 aarch64_sys_kcmp = 272,
1136 aarch64_sys_finit_module = 273,
1137 aarch64_sys_sched_setattr = 274,
1138 aarch64_sys_sched_getattr = 275,
1139 };
1140
1141 /* aarch64_canonicalize_syscall maps syscall ids from the native AArch64
1142 linux set of syscall ids into a canonical set of syscall ids used by
1143 process record. */
1144
1145 static enum gdb_syscall
1146 aarch64_canonicalize_syscall (enum aarch64_syscall syscall_number)
1147 {
1148 #define SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
1149 return gdb_sys_##SYSCALL
1150
1151 #define UNSUPPORTED_SYSCALL_MAP(SYSCALL) case aarch64_sys_##SYSCALL: \
1152 return gdb_sys_no_syscall
1153
1154 switch (syscall_number)
1155 {
1156 SYSCALL_MAP (io_setup);
1157 SYSCALL_MAP (io_destroy);
1158 SYSCALL_MAP (io_submit);
1159 SYSCALL_MAP (io_cancel);
1160 SYSCALL_MAP (io_getevents);
1161
1162 SYSCALL_MAP (setxattr);
1163 SYSCALL_MAP (lsetxattr);
1164 SYSCALL_MAP (fsetxattr);
1165 SYSCALL_MAP (getxattr);
1166 SYSCALL_MAP (lgetxattr);
1167 SYSCALL_MAP (fgetxattr);
1168 SYSCALL_MAP (listxattr);
1169 SYSCALL_MAP (llistxattr);
1170 SYSCALL_MAP (flistxattr);
1171 SYSCALL_MAP (removexattr);
1172 SYSCALL_MAP (lremovexattr);
1173 SYSCALL_MAP (fremovexattr);
1174 SYSCALL_MAP (getcwd);
1175 SYSCALL_MAP (lookup_dcookie);
1176 SYSCALL_MAP (eventfd2);
1177 SYSCALL_MAP (epoll_create1);
1178 SYSCALL_MAP (epoll_ctl);
1179 SYSCALL_MAP (epoll_pwait);
1180 SYSCALL_MAP (dup);
1181 SYSCALL_MAP (dup3);
1182 SYSCALL_MAP (fcntl);
1183 SYSCALL_MAP (inotify_init1);
1184 SYSCALL_MAP (inotify_add_watch);
1185 SYSCALL_MAP (inotify_rm_watch);
1186 SYSCALL_MAP (ioctl);
1187 SYSCALL_MAP (ioprio_set);
1188 SYSCALL_MAP (ioprio_get);
1189 SYSCALL_MAP (flock);
1190 SYSCALL_MAP (mknodat);
1191 SYSCALL_MAP (mkdirat);
1192 SYSCALL_MAP (unlinkat);
1193 SYSCALL_MAP (symlinkat);
1194 SYSCALL_MAP (linkat);
1195 SYSCALL_MAP (renameat);
1196 UNSUPPORTED_SYSCALL_MAP (umount2);
1197 SYSCALL_MAP (mount);
1198 SYSCALL_MAP (pivot_root);
1199 SYSCALL_MAP (nfsservctl);
1200 SYSCALL_MAP (statfs);
1201 SYSCALL_MAP (truncate);
1202 SYSCALL_MAP (ftruncate);
1203 SYSCALL_MAP (fallocate);
1204 SYSCALL_MAP (faccessat);
1205 SYSCALL_MAP (fchdir);
1206 SYSCALL_MAP (chroot);
1207 SYSCALL_MAP (fchmod);
1208 SYSCALL_MAP (fchmodat);
1209 SYSCALL_MAP (fchownat);
1210 SYSCALL_MAP (fchown);
1211 SYSCALL_MAP (openat);
1212 SYSCALL_MAP (close);
1213 SYSCALL_MAP (vhangup);
1214 SYSCALL_MAP (pipe2);
1215 SYSCALL_MAP (quotactl);
1216 SYSCALL_MAP (getdents64);
1217 SYSCALL_MAP (lseek);
1218 SYSCALL_MAP (read);
1219 SYSCALL_MAP (write);
1220 SYSCALL_MAP (readv);
1221 SYSCALL_MAP (writev);
1222 SYSCALL_MAP (pread64);
1223 SYSCALL_MAP (pwrite64);
1224 UNSUPPORTED_SYSCALL_MAP (preadv);
1225 UNSUPPORTED_SYSCALL_MAP (pwritev);
1226 SYSCALL_MAP (sendfile);
1227 SYSCALL_MAP (pselect6);
1228 SYSCALL_MAP (ppoll);
1229 UNSUPPORTED_SYSCALL_MAP (signalfd4);
1230 SYSCALL_MAP (vmsplice);
1231 SYSCALL_MAP (splice);
1232 SYSCALL_MAP (tee);
1233 SYSCALL_MAP (readlinkat);
1234 SYSCALL_MAP (newfstatat);
1235
1236 SYSCALL_MAP (fstat);
1237 SYSCALL_MAP (sync);
1238 SYSCALL_MAP (fsync);
1239 SYSCALL_MAP (fdatasync);
1240 SYSCALL_MAP (sync_file_range);
1241 UNSUPPORTED_SYSCALL_MAP (timerfd_create);
1242 UNSUPPORTED_SYSCALL_MAP (timerfd_settime);
1243 UNSUPPORTED_SYSCALL_MAP (timerfd_gettime);
1244 UNSUPPORTED_SYSCALL_MAP (utimensat);
1245 SYSCALL_MAP (acct);
1246 SYSCALL_MAP (capget);
1247 SYSCALL_MAP (capset);
1248 SYSCALL_MAP (personality);
1249 SYSCALL_MAP (exit);
1250 SYSCALL_MAP (exit_group);
1251 SYSCALL_MAP (waitid);
1252 SYSCALL_MAP (set_tid_address);
1253 SYSCALL_MAP (unshare);
1254 SYSCALL_MAP (futex);
1255 SYSCALL_MAP (set_robust_list);
1256 SYSCALL_MAP (get_robust_list);
1257 SYSCALL_MAP (nanosleep);
1258
1259 SYSCALL_MAP (getitimer);
1260 SYSCALL_MAP (setitimer);
1261 SYSCALL_MAP (kexec_load);
1262 SYSCALL_MAP (init_module);
1263 SYSCALL_MAP (delete_module);
1264 SYSCALL_MAP (timer_create);
1265 SYSCALL_MAP (timer_settime);
1266 SYSCALL_MAP (timer_gettime);
1267 SYSCALL_MAP (timer_getoverrun);
1268 SYSCALL_MAP (timer_delete);
1269 SYSCALL_MAP (clock_settime);
1270 SYSCALL_MAP (clock_gettime);
1271 SYSCALL_MAP (clock_getres);
1272 SYSCALL_MAP (clock_nanosleep);
1273 SYSCALL_MAP (syslog);
1274 SYSCALL_MAP (ptrace);
1275 SYSCALL_MAP (sched_setparam);
1276 SYSCALL_MAP (sched_setscheduler);
1277 SYSCALL_MAP (sched_getscheduler);
1278 SYSCALL_MAP (sched_getparam);
1279 SYSCALL_MAP (sched_setaffinity);
1280 SYSCALL_MAP (sched_getaffinity);
1281 SYSCALL_MAP (sched_yield);
1282 SYSCALL_MAP (sched_get_priority_max);
1283 SYSCALL_MAP (sched_get_priority_min);
1284 SYSCALL_MAP (sched_rr_get_interval);
1285 SYSCALL_MAP (kill);
1286 SYSCALL_MAP (tkill);
1287 SYSCALL_MAP (tgkill);
1288 SYSCALL_MAP (sigaltstack);
1289 SYSCALL_MAP (rt_sigsuspend);
1290 SYSCALL_MAP (rt_sigaction);
1291 SYSCALL_MAP (rt_sigprocmask);
1292 SYSCALL_MAP (rt_sigpending);
1293 SYSCALL_MAP (rt_sigtimedwait);
1294 SYSCALL_MAP (rt_sigqueueinfo);
1295 SYSCALL_MAP (rt_sigreturn);
1296 SYSCALL_MAP (setpriority);
1297 SYSCALL_MAP (getpriority);
1298 SYSCALL_MAP (reboot);
1299 SYSCALL_MAP (setregid);
1300 SYSCALL_MAP (setgid);
1301 SYSCALL_MAP (setreuid);
1302 SYSCALL_MAP (setuid);
1303 SYSCALL_MAP (setresuid);
1304 SYSCALL_MAP (getresuid);
1305 SYSCALL_MAP (setresgid);
1306 SYSCALL_MAP (getresgid);
1307 SYSCALL_MAP (setfsuid);
1308 SYSCALL_MAP (setfsgid);
1309 SYSCALL_MAP (times);
1310 SYSCALL_MAP (setpgid);
1311 SYSCALL_MAP (getpgid);
1312 SYSCALL_MAP (getsid);
1313 SYSCALL_MAP (setsid);
1314 SYSCALL_MAP (getgroups);
1315 SYSCALL_MAP (setgroups);
1316 SYSCALL_MAP (uname);
1317 SYSCALL_MAP (sethostname);
1318 SYSCALL_MAP (setdomainname);
1319 SYSCALL_MAP (getrlimit);
1320 SYSCALL_MAP (setrlimit);
1321 SYSCALL_MAP (getrusage);
1322 SYSCALL_MAP (umask);
1323 SYSCALL_MAP (prctl);
1324 SYSCALL_MAP (getcpu);
1325 SYSCALL_MAP (gettimeofday);
1326 SYSCALL_MAP (settimeofday);
1327 SYSCALL_MAP (adjtimex);
1328 SYSCALL_MAP (getpid);
1329 SYSCALL_MAP (getppid);
1330 SYSCALL_MAP (getuid);
1331 SYSCALL_MAP (geteuid);
1332 SYSCALL_MAP (getgid);
1333 SYSCALL_MAP (getegid);
1334 SYSCALL_MAP (gettid);
1335 SYSCALL_MAP (sysinfo);
1336 SYSCALL_MAP (mq_open);
1337 SYSCALL_MAP (mq_unlink);
1338 SYSCALL_MAP (mq_timedsend);
1339 SYSCALL_MAP (mq_timedreceive);
1340 SYSCALL_MAP (mq_notify);
1341 SYSCALL_MAP (mq_getsetattr);
1342 SYSCALL_MAP (msgget);
1343 SYSCALL_MAP (msgctl);
1344 SYSCALL_MAP (msgrcv);
1345 SYSCALL_MAP (msgsnd);
1346 SYSCALL_MAP (semget);
1347 SYSCALL_MAP (semctl);
1348 SYSCALL_MAP (semtimedop);
1349 SYSCALL_MAP (semop);
1350 SYSCALL_MAP (shmget);
1351 SYSCALL_MAP (shmctl);
1352 SYSCALL_MAP (shmat);
1353 SYSCALL_MAP (shmdt);
1354 SYSCALL_MAP (socket);
1355 SYSCALL_MAP (socketpair);
1356 SYSCALL_MAP (bind);
1357 SYSCALL_MAP (listen);
1358 SYSCALL_MAP (accept);
1359 SYSCALL_MAP (connect);
1360 SYSCALL_MAP (getsockname);
1361 SYSCALL_MAP (getpeername);
1362 SYSCALL_MAP (sendto);
1363 SYSCALL_MAP (recvfrom);
1364 SYSCALL_MAP (setsockopt);
1365 SYSCALL_MAP (getsockopt);
1366 SYSCALL_MAP (shutdown);
1367 SYSCALL_MAP (sendmsg);
1368 SYSCALL_MAP (recvmsg);
1369 SYSCALL_MAP (readahead);
1370 SYSCALL_MAP (brk);
1371 SYSCALL_MAP (munmap);
1372 SYSCALL_MAP (mremap);
1373 SYSCALL_MAP (add_key);
1374 SYSCALL_MAP (request_key);
1375 SYSCALL_MAP (keyctl);
1376 SYSCALL_MAP (clone);
1377 SYSCALL_MAP (execve);
1378
1379 case aarch64_sys_mmap:
1380 return gdb_sys_mmap2;
1381
1382 SYSCALL_MAP (fadvise64);
1383 SYSCALL_MAP (swapon);
1384 SYSCALL_MAP (swapoff);
1385 SYSCALL_MAP (mprotect);
1386 SYSCALL_MAP (msync);
1387 SYSCALL_MAP (mlock);
1388 SYSCALL_MAP (munlock);
1389 SYSCALL_MAP (mlockall);
1390 SYSCALL_MAP (munlockall);
1391 SYSCALL_MAP (mincore);
1392 SYSCALL_MAP (madvise);
1393 SYSCALL_MAP (remap_file_pages);
1394 SYSCALL_MAP (mbind);
1395 SYSCALL_MAP (get_mempolicy);
1396 SYSCALL_MAP (set_mempolicy);
1397 SYSCALL_MAP (migrate_pages);
1398 SYSCALL_MAP (move_pages);
1399 UNSUPPORTED_SYSCALL_MAP (rt_tgsigqueueinfo);
1400 UNSUPPORTED_SYSCALL_MAP (perf_event_open);
1401 UNSUPPORTED_SYSCALL_MAP (accept4);
1402 UNSUPPORTED_SYSCALL_MAP (recvmmsg);
1403
1404 SYSCALL_MAP (wait4);
1405
1406 UNSUPPORTED_SYSCALL_MAP (prlimit64);
1407 UNSUPPORTED_SYSCALL_MAP (fanotify_init);
1408 UNSUPPORTED_SYSCALL_MAP (fanotify_mark);
1409 UNSUPPORTED_SYSCALL_MAP (name_to_handle_at);
1410 UNSUPPORTED_SYSCALL_MAP (open_by_handle_at);
1411 UNSUPPORTED_SYSCALL_MAP (clock_adjtime);
1412 UNSUPPORTED_SYSCALL_MAP (syncfs);
1413 UNSUPPORTED_SYSCALL_MAP (setns);
1414 UNSUPPORTED_SYSCALL_MAP (sendmmsg);
1415 UNSUPPORTED_SYSCALL_MAP (process_vm_readv);
1416 UNSUPPORTED_SYSCALL_MAP (process_vm_writev);
1417 UNSUPPORTED_SYSCALL_MAP (kcmp);
1418 UNSUPPORTED_SYSCALL_MAP (finit_module);
1419 UNSUPPORTED_SYSCALL_MAP (sched_setattr);
1420 UNSUPPORTED_SYSCALL_MAP (sched_getattr);
1421 default:
1422 return gdb_sys_no_syscall;
1423 }
1424 }
1425
1426 /* Retrieve the syscall number at a ptrace syscall-stop, either on syscall entry
1427 or exit. Return -1 upon error. */
1428
1429 static LONGEST
1430 aarch64_linux_get_syscall_number (struct gdbarch *gdbarch, thread_info *thread)
1431 {
1432 struct regcache *regs = get_thread_regcache (thread);
1433 LONGEST ret;
1434
1435 /* Get the system call number from register x8. */
1436 regs->cooked_read (AARCH64_X0_REGNUM + 8, &ret);
1437
1438 /* On exit from a successful execve, we will be in a new process and all the
1439 registers will be cleared - x0 to x30 will be 0, except for a 1 in x7.
1440 This function will only ever get called when stopped at the entry or exit
1441 of a syscall, so by checking for 0 in x0 (arg0/retval), x1 (arg1), x8
1442 (syscall), x29 (FP) and x30 (LR) we can infer:
1443 1) Either inferior is at exit from successful execve.
1444 2) Or inferior is at entry to a call to io_setup with invalid arguments and
1445 a corrupted FP and LR.
1446 It should be safe enough to assume case 1. */
1447 if (ret == 0)
1448 {
1449 LONGEST x1 = -1, fp = -1, lr = -1;
1450 regs->cooked_read (AARCH64_X0_REGNUM + 1, &x1);
1451 regs->cooked_read (AARCH64_FP_REGNUM, &fp);
1452 regs->cooked_read (AARCH64_LR_REGNUM, &lr);
1453 if (x1 == 0 && fp ==0 && lr == 0)
1454 return aarch64_sys_execve;
1455 }
1456
1457 return ret;
1458 }
1459
1460 /* Record all registers but PC register for process-record. */
1461
1462 static int
1463 aarch64_all_but_pc_registers_record (struct regcache *regcache)
1464 {
1465 int i;
1466
1467 for (i = AARCH64_X0_REGNUM; i < AARCH64_PC_REGNUM; i++)
1468 if (record_full_arch_list_add_reg (regcache, i))
1469 return -1;
1470
1471 if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
1472 return -1;
1473
1474 return 0;
1475 }
1476
1477 /* Handler for aarch64 system call instruction recording. */
1478
1479 static int
1480 aarch64_linux_syscall_record (struct regcache *regcache,
1481 unsigned long svc_number)
1482 {
1483 int ret = 0;
1484 enum gdb_syscall syscall_gdb;
1485
1486 syscall_gdb =
1487 aarch64_canonicalize_syscall ((enum aarch64_syscall) svc_number);
1488
1489 if (syscall_gdb < 0)
1490 {
1491 printf_unfiltered (_("Process record and replay target doesn't "
1492 "support syscall number %s\n"),
1493 plongest (svc_number));
1494 return -1;
1495 }
1496
1497 if (syscall_gdb == gdb_sys_sigreturn
1498 || syscall_gdb == gdb_sys_rt_sigreturn)
1499 {
1500 if (aarch64_all_but_pc_registers_record (regcache))
1501 return -1;
1502 return 0;
1503 }
1504
1505 ret = record_linux_system_call (syscall_gdb, regcache,
1506 &aarch64_linux_record_tdep);
1507 if (ret != 0)
1508 return ret;
1509
1510 /* Record the return value of the system call. */
1511 if (record_full_arch_list_add_reg (regcache, AARCH64_X0_REGNUM))
1512 return -1;
1513 /* Record LR. */
1514 if (record_full_arch_list_add_reg (regcache, AARCH64_LR_REGNUM))
1515 return -1;
1516 /* Record CPSR. */
1517 if (record_full_arch_list_add_reg (regcache, AARCH64_CPSR_REGNUM))
1518 return -1;
1519
1520 return 0;
1521 }
1522
1523 /* Implement the "gcc_target_options" gdbarch method. */
1524
1525 static std::string
1526 aarch64_linux_gcc_target_options (struct gdbarch *gdbarch)
1527 {
1528 /* GCC doesn't know "-m64". */
1529 return {};
1530 }
1531
1532 /* Helper to get the allocation tag from a 64-bit ADDRESS.
1533
1534 Return the allocation tag if successful and nullopt otherwise. */
1535
1536 static gdb::optional<CORE_ADDR>
1537 aarch64_mte_get_atag (CORE_ADDR address)
1538 {
1539 gdb::byte_vector tags;
1540
1541 /* Attempt to fetch the allocation tag. */
1542 if (!target_fetch_memtags (address, 1, tags,
1543 static_cast<int> (memtag_type::allocation)))
1544 return {};
1545
1546 /* Only one tag should've been returned. Make sure we got exactly that. */
1547 if (tags.size () != 1)
1548 error (_("Target returned an unexpected number of tags."));
1549
1550 /* Although our tags are 4 bits in size, they are stored in a
1551 byte. */
1552 return tags[0];
1553 }
1554
1555 /* Implement the tagged_address_p gdbarch method. */
1556
1557 static bool
1558 aarch64_linux_tagged_address_p (struct gdbarch *gdbarch, struct value *address)
1559 {
1560 gdb_assert (address != nullptr);
1561
1562 CORE_ADDR addr = value_as_address (address);
1563
1564 /* Remove the top byte for the memory range check. */
1565 addr = address_significant (gdbarch, addr);
1566
1567 /* Check if the page that contains ADDRESS is mapped with PROT_MTE. */
1568 if (!linux_address_in_memtag_page (addr))
1569 return false;
1570
1571 /* We have a valid tag in the top byte of the 64-bit address. */
1572 return true;
1573 }
1574
1575 /* Implement the memtag_matches_p gdbarch method. */
1576
1577 static bool
1578 aarch64_linux_memtag_matches_p (struct gdbarch *gdbarch,
1579 struct value *address)
1580 {
1581 gdb_assert (address != nullptr);
1582
1583 /* Make sure we are dealing with a tagged address to begin with. */
1584 if (!aarch64_linux_tagged_address_p (gdbarch, address))
1585 return true;
1586
1587 CORE_ADDR addr = value_as_address (address);
1588
1589 /* Fetch the allocation tag for ADDRESS. */
1590 gdb::optional<CORE_ADDR> atag
1591 = aarch64_mte_get_atag (address_significant (gdbarch, addr));
1592
1593 if (!atag.has_value ())
1594 return true;
1595
1596 /* Fetch the logical tag for ADDRESS. */
1597 gdb_byte ltag = aarch64_mte_get_ltag (addr);
1598
1599 /* Are the tags the same? */
1600 return ltag == *atag;
1601 }
1602
1603 /* Implement the set_memtags gdbarch method. */
1604
1605 static bool
1606 aarch64_linux_set_memtags (struct gdbarch *gdbarch, struct value *address,
1607 size_t length, const gdb::byte_vector &tags,
1608 memtag_type tag_type)
1609 {
1610 gdb_assert (!tags.empty ());
1611 gdb_assert (address != nullptr);
1612
1613 CORE_ADDR addr = value_as_address (address);
1614
1615 /* Set the logical tag or the allocation tag. */
1616 if (tag_type == memtag_type::logical)
1617 {
1618 /* When setting logical tags, we don't care about the length, since
1619 we are only setting a single logical tag. */
1620 addr = aarch64_mte_set_ltag (addr, tags[0]);
1621
1622 /* Update the value's content with the tag. */
1623 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1624 gdb_byte *srcbuf = value_contents_raw (address);
1625 store_unsigned_integer (srcbuf, sizeof (addr), byte_order, addr);
1626 }
1627 else
1628 {
1629 /* Remove the top byte. */
1630 addr = address_significant (gdbarch, addr);
1631
1632 /* Make sure we are dealing with a tagged address to begin with. */
1633 if (!aarch64_linux_tagged_address_p (gdbarch, address))
1634 return false;
1635
1636 /* With G being the number of tag granules and N the number of tags
1637 passed in, we can have the following cases:
1638
1639 1 - G == N: Store all the N tags to memory.
1640
1641 2 - G < N : Warn about having more tags than granules, but write G
1642 tags.
1643
1644 3 - G > N : This is a "fill tags" operation. We should use the tags
1645 as a pattern to fill the granules repeatedly until we have
1646 written G tags to memory.
1647 */
1648
1649 size_t g = aarch64_mte_get_tag_granules (addr, length,
1650 AARCH64_MTE_GRANULE_SIZE);
1651 size_t n = tags.size ();
1652
1653 if (g < n)
1654 warning (_("Got more tags than memory granules. Tags will be "
1655 "truncated."));
1656 else if (g > n)
1657 warning (_("Using tag pattern to fill memory range."));
1658
1659 if (!target_store_memtags (addr, length, tags,
1660 static_cast<int> (memtag_type::allocation)))
1661 return false;
1662 }
1663 return true;
1664 }
1665
1666 /* Implement the get_memtag gdbarch method. */
1667
1668 static struct value *
1669 aarch64_linux_get_memtag (struct gdbarch *gdbarch, struct value *address,
1670 memtag_type tag_type)
1671 {
1672 gdb_assert (address != nullptr);
1673
1674 CORE_ADDR addr = value_as_address (address);
1675 CORE_ADDR tag = 0;
1676
1677 /* Get the logical tag or the allocation tag. */
1678 if (tag_type == memtag_type::logical)
1679 tag = aarch64_mte_get_ltag (addr);
1680 else
1681 {
1682 /* Make sure we are dealing with a tagged address to begin with. */
1683 if (!aarch64_linux_tagged_address_p (gdbarch, address))
1684 return nullptr;
1685
1686 /* Remove the top byte. */
1687 addr = address_significant (gdbarch, addr);
1688 gdb::optional<CORE_ADDR> atag = aarch64_mte_get_atag (addr);
1689
1690 if (!atag.has_value ())
1691 return nullptr;
1692
1693 tag = *atag;
1694 }
1695
1696 /* Convert the tag to a value. */
1697 return value_from_ulongest (builtin_type (gdbarch)->builtin_unsigned_int,
1698 tag);
1699 }
1700
1701 /* Implement the memtag_to_string gdbarch method. */
1702
1703 static std::string
1704 aarch64_linux_memtag_to_string (struct gdbarch *gdbarch, struct value *tag_value)
1705 {
1706 if (tag_value == nullptr)
1707 return "";
1708
1709 CORE_ADDR tag = value_as_address (tag_value);
1710
1711 return string_printf ("0x%s", phex_nz (tag, sizeof (tag)));
1712 }
1713
1714 /* AArch64 Linux implementation of the report_signal_info gdbarch
1715 hook. Displays information about possible memory tag violations. */
1716
1717 static void
1718 aarch64_linux_report_signal_info (struct gdbarch *gdbarch,
1719 struct ui_out *uiout,
1720 enum gdb_signal siggnal)
1721 {
1722 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1723
1724 if (!tdep->has_mte () || siggnal != GDB_SIGNAL_SEGV)
1725 return;
1726
1727 CORE_ADDR fault_addr = 0;
1728 long si_code = 0;
1729
1730 try
1731 {
1732 /* Sigcode tells us if the segfault is actually a memory tag
1733 violation. */
1734 si_code = parse_and_eval_long ("$_siginfo.si_code");
1735
1736 fault_addr
1737 = parse_and_eval_long ("$_siginfo._sifields._sigfault.si_addr");
1738 }
1739 catch (const gdb_exception_error &exception)
1740 {
1741 exception_print (gdb_stderr, exception);
1742 return;
1743 }
1744
1745 /* If this is not a memory tag violation, just return. */
1746 if (si_code != SEGV_MTEAERR && si_code != SEGV_MTESERR)
1747 return;
1748
1749 uiout->text ("\n");
1750
1751 uiout->field_string ("sigcode-meaning", _("Memory tag violation"));
1752
1753 /* For synchronous faults, show additional information. */
1754 if (si_code == SEGV_MTESERR)
1755 {
1756 uiout->text (_(" while accessing address "));
1757 uiout->field_core_addr ("fault-addr", gdbarch, fault_addr);
1758 uiout->text ("\n");
1759
1760 gdb::optional<CORE_ADDR> atag
1761 = aarch64_mte_get_atag (address_significant (gdbarch, fault_addr));
1762 gdb_byte ltag = aarch64_mte_get_ltag (fault_addr);
1763
1764 if (!atag.has_value ())
1765 uiout->text (_("Allocation tag unavailable"));
1766 else
1767 {
1768 uiout->text (_("Allocation tag "));
1769 uiout->field_string ("allocation-tag", hex_string (*atag));
1770 uiout->text ("\n");
1771 uiout->text (_("Logical tag "));
1772 uiout->field_string ("logical-tag", hex_string (ltag));
1773 }
1774 }
1775 else
1776 {
1777 uiout->text ("\n");
1778 uiout->text (_("Fault address unavailable"));
1779 }
1780 }
1781
1782 static void
1783 aarch64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
1784 {
1785 static const char *const stap_integer_prefixes[] = { "#", "", NULL };
1786 static const char *const stap_register_prefixes[] = { "", NULL };
1787 static const char *const stap_register_indirection_prefixes[] = { "[",
1788 NULL };
1789 static const char *const stap_register_indirection_suffixes[] = { "]",
1790 NULL };
1791 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1792
1793 tdep->lowest_pc = 0x8000;
1794
1795 linux_init_abi (info, gdbarch, 1);
1796
1797 set_solib_svr4_fetch_link_map_offsets (gdbarch,
1798 svr4_lp64_fetch_link_map_offsets);
1799
1800 /* Enable TLS support. */
1801 set_gdbarch_fetch_tls_load_module_address (gdbarch,
1802 svr4_fetch_objfile_link_map);
1803
1804 /* Shared library handling. */
1805 set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
1806 set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
1807
1808 tramp_frame_prepend_unwinder (gdbarch, &aarch64_linux_rt_sigframe);
1809
1810 /* Enable longjmp. */
1811 tdep->jb_pc = 11;
1812
1813 set_gdbarch_iterate_over_regset_sections
1814 (gdbarch, aarch64_linux_iterate_over_regset_sections);
1815 set_gdbarch_core_read_description
1816 (gdbarch, aarch64_linux_core_read_description);
1817
1818 /* SystemTap related. */
1819 set_gdbarch_stap_integer_prefixes (gdbarch, stap_integer_prefixes);
1820 set_gdbarch_stap_register_prefixes (gdbarch, stap_register_prefixes);
1821 set_gdbarch_stap_register_indirection_prefixes (gdbarch,
1822 stap_register_indirection_prefixes);
1823 set_gdbarch_stap_register_indirection_suffixes (gdbarch,
1824 stap_register_indirection_suffixes);
1825 set_gdbarch_stap_is_single_operand (gdbarch, aarch64_stap_is_single_operand);
1826 set_gdbarch_stap_parse_special_token (gdbarch,
1827 aarch64_stap_parse_special_token);
1828
1829 /* Reversible debugging, process record. */
1830 set_gdbarch_process_record (gdbarch, aarch64_process_record);
1831 /* Syscall record. */
1832 tdep->aarch64_syscall_record = aarch64_linux_syscall_record;
1833
1834 /* The top byte of a user space address known as the "tag",
1835 is ignored by the kernel and can be regarded as additional
1836 data associated with the address. */
1837 set_gdbarch_significant_addr_bit (gdbarch, 56);
1838
1839 /* MTE-specific settings and hooks. */
1840 if (tdep->has_mte ())
1841 {
1842 /* Register a hook for checking if an address is tagged or not. */
1843 set_gdbarch_tagged_address_p (gdbarch, aarch64_linux_tagged_address_p);
1844
1845 /* Register a hook for checking if there is a memory tag match. */
1846 set_gdbarch_memtag_matches_p (gdbarch,
1847 aarch64_linux_memtag_matches_p);
1848
1849 /* Register a hook for setting the logical/allocation tags for
1850 a range of addresses. */
1851 set_gdbarch_set_memtags (gdbarch, aarch64_linux_set_memtags);
1852
1853 /* Register a hook for extracting the logical/allocation tag from an
1854 address. */
1855 set_gdbarch_get_memtag (gdbarch, aarch64_linux_get_memtag);
1856
1857 /* Set the allocation tag granule size to 16 bytes. */
1858 set_gdbarch_memtag_granule_size (gdbarch, AARCH64_MTE_GRANULE_SIZE);
1859
1860 /* Register a hook for converting a memory tag to a string. */
1861 set_gdbarch_memtag_to_string (gdbarch, aarch64_linux_memtag_to_string);
1862
1863 set_gdbarch_report_signal_info (gdbarch,
1864 aarch64_linux_report_signal_info);
1865 }
1866
1867 /* Initialize the aarch64_linux_record_tdep. */
1868 /* These values are the size of the type that will be used in a system
1869 call. They are obtained from Linux Kernel source. */
1870 aarch64_linux_record_tdep.size_pointer
1871 = gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT;
1872 aarch64_linux_record_tdep.size__old_kernel_stat = 32;
1873 aarch64_linux_record_tdep.size_tms = 32;
1874 aarch64_linux_record_tdep.size_loff_t = 8;
1875 aarch64_linux_record_tdep.size_flock = 32;
1876 aarch64_linux_record_tdep.size_oldold_utsname = 45;
1877 aarch64_linux_record_tdep.size_ustat = 32;
1878 aarch64_linux_record_tdep.size_old_sigaction = 32;
1879 aarch64_linux_record_tdep.size_old_sigset_t = 8;
1880 aarch64_linux_record_tdep.size_rlimit = 16;
1881 aarch64_linux_record_tdep.size_rusage = 144;
1882 aarch64_linux_record_tdep.size_timeval = 16;
1883 aarch64_linux_record_tdep.size_timezone = 8;
1884 aarch64_linux_record_tdep.size_old_gid_t = 2;
1885 aarch64_linux_record_tdep.size_old_uid_t = 2;
1886 aarch64_linux_record_tdep.size_fd_set = 128;
1887 aarch64_linux_record_tdep.size_old_dirent = 280;
1888 aarch64_linux_record_tdep.size_statfs = 120;
1889 aarch64_linux_record_tdep.size_statfs64 = 120;
1890 aarch64_linux_record_tdep.size_sockaddr = 16;
1891 aarch64_linux_record_tdep.size_int
1892 = gdbarch_int_bit (gdbarch) / TARGET_CHAR_BIT;
1893 aarch64_linux_record_tdep.size_long
1894 = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
1895 aarch64_linux_record_tdep.size_ulong
1896 = gdbarch_long_bit (gdbarch) / TARGET_CHAR_BIT;
1897 aarch64_linux_record_tdep.size_msghdr = 56;
1898 aarch64_linux_record_tdep.size_itimerval = 32;
1899 aarch64_linux_record_tdep.size_stat = 144;
1900 aarch64_linux_record_tdep.size_old_utsname = 325;
1901 aarch64_linux_record_tdep.size_sysinfo = 112;
1902 aarch64_linux_record_tdep.size_msqid_ds = 120;
1903 aarch64_linux_record_tdep.size_shmid_ds = 112;
1904 aarch64_linux_record_tdep.size_new_utsname = 390;
1905 aarch64_linux_record_tdep.size_timex = 208;
1906 aarch64_linux_record_tdep.size_mem_dqinfo = 24;
1907 aarch64_linux_record_tdep.size_if_dqblk = 72;
1908 aarch64_linux_record_tdep.size_fs_quota_stat = 80;
1909 aarch64_linux_record_tdep.size_timespec = 16;
1910 aarch64_linux_record_tdep.size_pollfd = 8;
1911 aarch64_linux_record_tdep.size_NFS_FHSIZE = 32;
1912 aarch64_linux_record_tdep.size_knfsd_fh = 132;
1913 aarch64_linux_record_tdep.size_TASK_COMM_LEN = 16;
1914 aarch64_linux_record_tdep.size_sigaction = 32;
1915 aarch64_linux_record_tdep.size_sigset_t = 8;
1916 aarch64_linux_record_tdep.size_siginfo_t = 128;
1917 aarch64_linux_record_tdep.size_cap_user_data_t = 8;
1918 aarch64_linux_record_tdep.size_stack_t = 24;
1919 aarch64_linux_record_tdep.size_off_t = 8;
1920 aarch64_linux_record_tdep.size_stat64 = 144;
1921 aarch64_linux_record_tdep.size_gid_t = 4;
1922 aarch64_linux_record_tdep.size_uid_t = 4;
1923 aarch64_linux_record_tdep.size_PAGE_SIZE = 4096;
1924 aarch64_linux_record_tdep.size_flock64 = 32;
1925 aarch64_linux_record_tdep.size_user_desc = 16;
1926 aarch64_linux_record_tdep.size_io_event = 32;
1927 aarch64_linux_record_tdep.size_iocb = 64;
1928 aarch64_linux_record_tdep.size_epoll_event = 12;
1929 aarch64_linux_record_tdep.size_itimerspec = 32;
1930 aarch64_linux_record_tdep.size_mq_attr = 64;
1931 aarch64_linux_record_tdep.size_termios = 36;
1932 aarch64_linux_record_tdep.size_termios2 = 44;
1933 aarch64_linux_record_tdep.size_pid_t = 4;
1934 aarch64_linux_record_tdep.size_winsize = 8;
1935 aarch64_linux_record_tdep.size_serial_struct = 72;
1936 aarch64_linux_record_tdep.size_serial_icounter_struct = 80;
1937 aarch64_linux_record_tdep.size_hayes_esp_config = 12;
1938 aarch64_linux_record_tdep.size_size_t = 8;
1939 aarch64_linux_record_tdep.size_iovec = 16;
1940 aarch64_linux_record_tdep.size_time_t = 8;
1941
1942 /* These values are the second argument of system call "sys_ioctl".
1943 They are obtained from Linux Kernel source. */
1944 aarch64_linux_record_tdep.ioctl_TCGETS = 0x5401;
1945 aarch64_linux_record_tdep.ioctl_TCSETS = 0x5402;
1946 aarch64_linux_record_tdep.ioctl_TCSETSW = 0x5403;
1947 aarch64_linux_record_tdep.ioctl_TCSETSF = 0x5404;
1948 aarch64_linux_record_tdep.ioctl_TCGETA = 0x5405;
1949 aarch64_linux_record_tdep.ioctl_TCSETA = 0x5406;
1950 aarch64_linux_record_tdep.ioctl_TCSETAW = 0x5407;
1951 aarch64_linux_record_tdep.ioctl_TCSETAF = 0x5408;
1952 aarch64_linux_record_tdep.ioctl_TCSBRK = 0x5409;
1953 aarch64_linux_record_tdep.ioctl_TCXONC = 0x540a;
1954 aarch64_linux_record_tdep.ioctl_TCFLSH = 0x540b;
1955 aarch64_linux_record_tdep.ioctl_TIOCEXCL = 0x540c;
1956 aarch64_linux_record_tdep.ioctl_TIOCNXCL = 0x540d;
1957 aarch64_linux_record_tdep.ioctl_TIOCSCTTY = 0x540e;
1958 aarch64_linux_record_tdep.ioctl_TIOCGPGRP = 0x540f;
1959 aarch64_linux_record_tdep.ioctl_TIOCSPGRP = 0x5410;
1960 aarch64_linux_record_tdep.ioctl_TIOCOUTQ = 0x5411;
1961 aarch64_linux_record_tdep.ioctl_TIOCSTI = 0x5412;
1962 aarch64_linux_record_tdep.ioctl_TIOCGWINSZ = 0x5413;
1963 aarch64_linux_record_tdep.ioctl_TIOCSWINSZ = 0x5414;
1964 aarch64_linux_record_tdep.ioctl_TIOCMGET = 0x5415;
1965 aarch64_linux_record_tdep.ioctl_TIOCMBIS = 0x5416;
1966 aarch64_linux_record_tdep.ioctl_TIOCMBIC = 0x5417;
1967 aarch64_linux_record_tdep.ioctl_TIOCMSET = 0x5418;
1968 aarch64_linux_record_tdep.ioctl_TIOCGSOFTCAR = 0x5419;
1969 aarch64_linux_record_tdep.ioctl_TIOCSSOFTCAR = 0x541a;
1970 aarch64_linux_record_tdep.ioctl_FIONREAD = 0x541b;
1971 aarch64_linux_record_tdep.ioctl_TIOCINQ = 0x541b;
1972 aarch64_linux_record_tdep.ioctl_TIOCLINUX = 0x541c;
1973 aarch64_linux_record_tdep.ioctl_TIOCCONS = 0x541d;
1974 aarch64_linux_record_tdep.ioctl_TIOCGSERIAL = 0x541e;
1975 aarch64_linux_record_tdep.ioctl_TIOCSSERIAL = 0x541f;
1976 aarch64_linux_record_tdep.ioctl_TIOCPKT = 0x5420;
1977 aarch64_linux_record_tdep.ioctl_FIONBIO = 0x5421;
1978 aarch64_linux_record_tdep.ioctl_TIOCNOTTY = 0x5422;
1979 aarch64_linux_record_tdep.ioctl_TIOCSETD = 0x5423;
1980 aarch64_linux_record_tdep.ioctl_TIOCGETD = 0x5424;
1981 aarch64_linux_record_tdep.ioctl_TCSBRKP = 0x5425;
1982 aarch64_linux_record_tdep.ioctl_TIOCTTYGSTRUCT = 0x5426;
1983 aarch64_linux_record_tdep.ioctl_TIOCSBRK = 0x5427;
1984 aarch64_linux_record_tdep.ioctl_TIOCCBRK = 0x5428;
1985 aarch64_linux_record_tdep.ioctl_TIOCGSID = 0x5429;
1986 aarch64_linux_record_tdep.ioctl_TCGETS2 = 0x802c542a;
1987 aarch64_linux_record_tdep.ioctl_TCSETS2 = 0x402c542b;
1988 aarch64_linux_record_tdep.ioctl_TCSETSW2 = 0x402c542c;
1989 aarch64_linux_record_tdep.ioctl_TCSETSF2 = 0x402c542d;
1990 aarch64_linux_record_tdep.ioctl_TIOCGPTN = 0x80045430;
1991 aarch64_linux_record_tdep.ioctl_TIOCSPTLCK = 0x40045431;
1992 aarch64_linux_record_tdep.ioctl_FIONCLEX = 0x5450;
1993 aarch64_linux_record_tdep.ioctl_FIOCLEX = 0x5451;
1994 aarch64_linux_record_tdep.ioctl_FIOASYNC = 0x5452;
1995 aarch64_linux_record_tdep.ioctl_TIOCSERCONFIG = 0x5453;
1996 aarch64_linux_record_tdep.ioctl_TIOCSERGWILD = 0x5454;
1997 aarch64_linux_record_tdep.ioctl_TIOCSERSWILD = 0x5455;
1998 aarch64_linux_record_tdep.ioctl_TIOCGLCKTRMIOS = 0x5456;
1999 aarch64_linux_record_tdep.ioctl_TIOCSLCKTRMIOS = 0x5457;
2000 aarch64_linux_record_tdep.ioctl_TIOCSERGSTRUCT = 0x5458;
2001 aarch64_linux_record_tdep.ioctl_TIOCSERGETLSR = 0x5459;
2002 aarch64_linux_record_tdep.ioctl_TIOCSERGETMULTI = 0x545a;
2003 aarch64_linux_record_tdep.ioctl_TIOCSERSETMULTI = 0x545b;
2004 aarch64_linux_record_tdep.ioctl_TIOCMIWAIT = 0x545c;
2005 aarch64_linux_record_tdep.ioctl_TIOCGICOUNT = 0x545d;
2006 aarch64_linux_record_tdep.ioctl_TIOCGHAYESESP = 0x545e;
2007 aarch64_linux_record_tdep.ioctl_TIOCSHAYESESP = 0x545f;
2008 aarch64_linux_record_tdep.ioctl_FIOQSIZE = 0x5460;
2009
2010 /* These values are the second argument of system call "sys_fcntl"
2011 and "sys_fcntl64". They are obtained from Linux Kernel source. */
2012 aarch64_linux_record_tdep.fcntl_F_GETLK = 5;
2013 aarch64_linux_record_tdep.fcntl_F_GETLK64 = 12;
2014 aarch64_linux_record_tdep.fcntl_F_SETLK64 = 13;
2015 aarch64_linux_record_tdep.fcntl_F_SETLKW64 = 14;
2016
2017 /* The AArch64 syscall calling convention: reg x0-x6 for arguments,
2018 reg x8 for syscall number and return value in reg x0. */
2019 aarch64_linux_record_tdep.arg1 = AARCH64_X0_REGNUM + 0;
2020 aarch64_linux_record_tdep.arg2 = AARCH64_X0_REGNUM + 1;
2021 aarch64_linux_record_tdep.arg3 = AARCH64_X0_REGNUM + 2;
2022 aarch64_linux_record_tdep.arg4 = AARCH64_X0_REGNUM + 3;
2023 aarch64_linux_record_tdep.arg5 = AARCH64_X0_REGNUM + 4;
2024 aarch64_linux_record_tdep.arg6 = AARCH64_X0_REGNUM + 5;
2025 aarch64_linux_record_tdep.arg7 = AARCH64_X0_REGNUM + 6;
2026
2027 /* `catch syscall' */
2028 set_xml_syscall_file_name (gdbarch, "syscalls/aarch64-linux.xml");
2029 set_gdbarch_get_syscall_number (gdbarch, aarch64_linux_get_syscall_number);
2030
2031 /* Displaced stepping. */
2032 set_gdbarch_max_insn_length (gdbarch, 4 * AARCH64_DISPLACED_MODIFIED_INSNS);
2033 set_gdbarch_displaced_step_copy_insn (gdbarch,
2034 aarch64_displaced_step_copy_insn);
2035 set_gdbarch_displaced_step_fixup (gdbarch, aarch64_displaced_step_fixup);
2036 set_gdbarch_displaced_step_hw_singlestep (gdbarch,
2037 aarch64_displaced_step_hw_singlestep);
2038
2039 set_gdbarch_gcc_target_options (gdbarch, aarch64_linux_gcc_target_options);
2040 }
2041
2042 #if GDB_SELF_TEST
2043
2044 namespace selftests {
2045
2046 /* Verify functions to read and write logical tags. */
2047
2048 static void
2049 aarch64_linux_ltag_tests (void)
2050 {
2051 /* We have 4 bits of tags, but we test writing all the bits of the top
2052 byte of address. */
2053 for (int i = 0; i < 1 << 8; i++)
2054 {
2055 CORE_ADDR addr = ((CORE_ADDR) i << 56) | 0xdeadbeef;
2056 SELF_CHECK (aarch64_mte_get_ltag (addr) == (i & 0xf));
2057
2058 addr = aarch64_mte_set_ltag (0xdeadbeef, i);
2059 SELF_CHECK (addr = ((CORE_ADDR) (i & 0xf) << 56) | 0xdeadbeef);
2060 }
2061 }
2062
2063 } // namespace selftests
2064 #endif /* GDB_SELF_TEST */
2065
2066 void _initialize_aarch64_linux_tdep ();
2067 void
2068 _initialize_aarch64_linux_tdep ()
2069 {
2070 gdbarch_register_osabi (bfd_arch_aarch64, 0, GDB_OSABI_LINUX,
2071 aarch64_linux_init_abi);
2072
2073 #if GDB_SELF_TEST
2074 selftests::register_test ("aarch64-linux-tagged-address",
2075 selftests::aarch64_linux_ltag_tests);
2076 #endif
2077 }
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