1 /* Common target dependent code for GDB on AArch64 systems.
3 Copyright (C) 2009-2019 Free Software Foundation, Inc.
4 Contributed by ARM Ltd.
6 This file is part of GDB.
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.
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.
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/>. */
29 #include "reggroups.h"
31 #include "arch-utils.h"
33 #include "frame-unwind.h"
34 #include "frame-base.h"
35 #include "trad-frame.h"
38 #include "dwarf2-frame.h"
40 #include "prologue-value.h"
41 #include "target-descriptions.h"
42 #include "user-regs.h"
47 #include "gdbsupport/selftest.h"
49 #include "aarch64-tdep.h"
50 #include "aarch64-ravenscar-thread.h"
53 #include "elf/aarch64.h"
55 #include "gdbsupport/vec.h"
58 #include "record-full.h"
59 #include "arch/aarch64-insn.h"
62 #include "opcode/aarch64.h"
65 #define submask(x) ((1L << ((x) + 1)) - 1)
66 #define bit(obj,st) (((obj) >> (st)) & 1)
67 #define bits(obj,st,fn) (((obj) >> (st)) & submask ((fn) - (st)))
69 /* A Homogeneous Floating-Point or Short-Vector Aggregate may have at most
71 #define HA_MAX_NUM_FLDS 4
73 /* All possible aarch64 target descriptors. */
74 struct target_desc *tdesc_aarch64_list[AARCH64_MAX_SVE_VQ + 1][2/*pauth*/];
76 /* The standard register names, and all the valid aliases for them. */
79 const char *const name;
81 } aarch64_register_aliases[] =
83 /* 64-bit register names. */
84 {"fp", AARCH64_FP_REGNUM},
85 {"lr", AARCH64_LR_REGNUM},
86 {"sp", AARCH64_SP_REGNUM},
88 /* 32-bit register names. */
89 {"w0", AARCH64_X0_REGNUM + 0},
90 {"w1", AARCH64_X0_REGNUM + 1},
91 {"w2", AARCH64_X0_REGNUM + 2},
92 {"w3", AARCH64_X0_REGNUM + 3},
93 {"w4", AARCH64_X0_REGNUM + 4},
94 {"w5", AARCH64_X0_REGNUM + 5},
95 {"w6", AARCH64_X0_REGNUM + 6},
96 {"w7", AARCH64_X0_REGNUM + 7},
97 {"w8", AARCH64_X0_REGNUM + 8},
98 {"w9", AARCH64_X0_REGNUM + 9},
99 {"w10", AARCH64_X0_REGNUM + 10},
100 {"w11", AARCH64_X0_REGNUM + 11},
101 {"w12", AARCH64_X0_REGNUM + 12},
102 {"w13", AARCH64_X0_REGNUM + 13},
103 {"w14", AARCH64_X0_REGNUM + 14},
104 {"w15", AARCH64_X0_REGNUM + 15},
105 {"w16", AARCH64_X0_REGNUM + 16},
106 {"w17", AARCH64_X0_REGNUM + 17},
107 {"w18", AARCH64_X0_REGNUM + 18},
108 {"w19", AARCH64_X0_REGNUM + 19},
109 {"w20", AARCH64_X0_REGNUM + 20},
110 {"w21", AARCH64_X0_REGNUM + 21},
111 {"w22", AARCH64_X0_REGNUM + 22},
112 {"w23", AARCH64_X0_REGNUM + 23},
113 {"w24", AARCH64_X0_REGNUM + 24},
114 {"w25", AARCH64_X0_REGNUM + 25},
115 {"w26", AARCH64_X0_REGNUM + 26},
116 {"w27", AARCH64_X0_REGNUM + 27},
117 {"w28", AARCH64_X0_REGNUM + 28},
118 {"w29", AARCH64_X0_REGNUM + 29},
119 {"w30", AARCH64_X0_REGNUM + 30},
122 {"ip0", AARCH64_X0_REGNUM + 16},
123 {"ip1", AARCH64_X0_REGNUM + 17}
126 /* The required core 'R' registers. */
127 static const char *const aarch64_r_register_names[] =
129 /* These registers must appear in consecutive RAW register number
130 order and they must begin with AARCH64_X0_REGNUM! */
131 "x0", "x1", "x2", "x3",
132 "x4", "x5", "x6", "x7",
133 "x8", "x9", "x10", "x11",
134 "x12", "x13", "x14", "x15",
135 "x16", "x17", "x18", "x19",
136 "x20", "x21", "x22", "x23",
137 "x24", "x25", "x26", "x27",
138 "x28", "x29", "x30", "sp",
142 /* The FP/SIMD 'V' registers. */
143 static const char *const aarch64_v_register_names[] =
145 /* These registers must appear in consecutive RAW register number
146 order and they must begin with AARCH64_V0_REGNUM! */
147 "v0", "v1", "v2", "v3",
148 "v4", "v5", "v6", "v7",
149 "v8", "v9", "v10", "v11",
150 "v12", "v13", "v14", "v15",
151 "v16", "v17", "v18", "v19",
152 "v20", "v21", "v22", "v23",
153 "v24", "v25", "v26", "v27",
154 "v28", "v29", "v30", "v31",
159 /* The SVE 'Z' and 'P' registers. */
160 static const char *const aarch64_sve_register_names[] =
162 /* These registers must appear in consecutive RAW register number
163 order and they must begin with AARCH64_SVE_Z0_REGNUM! */
164 "z0", "z1", "z2", "z3",
165 "z4", "z5", "z6", "z7",
166 "z8", "z9", "z10", "z11",
167 "z12", "z13", "z14", "z15",
168 "z16", "z17", "z18", "z19",
169 "z20", "z21", "z22", "z23",
170 "z24", "z25", "z26", "z27",
171 "z28", "z29", "z30", "z31",
173 "p0", "p1", "p2", "p3",
174 "p4", "p5", "p6", "p7",
175 "p8", "p9", "p10", "p11",
176 "p12", "p13", "p14", "p15",
180 static const char *const aarch64_pauth_register_names[] =
182 /* Authentication mask for data pointer. */
184 /* Authentication mask for code pointer. */
188 /* AArch64 prologue cache structure. */
189 struct aarch64_prologue_cache
191 /* The program counter at the start of the function. It is used to
192 identify this frame as a prologue frame. */
195 /* The program counter at the time this frame was created; i.e. where
196 this function was called from. It is used to identify this frame as a
200 /* The stack pointer at the time this frame was created; i.e. the
201 caller's stack pointer when this function was called. It is used
202 to identify this frame. */
205 /* Is the target available to read from? */
208 /* The frame base for this frame is just prev_sp - frame size.
209 FRAMESIZE is the distance from the frame pointer to the
210 initial stack pointer. */
213 /* The register used to hold the frame pointer for this frame. */
216 /* Saved register offsets. */
217 struct trad_frame_saved_reg *saved_regs;
221 show_aarch64_debug (struct ui_file *file, int from_tty,
222 struct cmd_list_element *c, const char *value)
224 fprintf_filtered (file, _("AArch64 debugging is %s.\n"), value);
229 /* Abstract instruction reader. */
231 class abstract_instruction_reader
234 /* Read in one instruction. */
235 virtual ULONGEST read (CORE_ADDR memaddr, int len,
236 enum bfd_endian byte_order) = 0;
239 /* Instruction reader from real target. */
241 class instruction_reader : public abstract_instruction_reader
244 ULONGEST read (CORE_ADDR memaddr, int len, enum bfd_endian byte_order)
247 return read_code_unsigned_integer (memaddr, len, byte_order);
253 /* If address signing is enabled, mask off the signature bits from ADDR, using
254 the register values in THIS_FRAME. */
257 aarch64_frame_unmask_address (struct gdbarch_tdep *tdep,
258 struct frame_info *this_frame,
261 if (tdep->has_pauth ()
262 && frame_unwind_register_unsigned (this_frame,
263 tdep->pauth_ra_state_regnum))
265 int cmask_num = AARCH64_PAUTH_CMASK_REGNUM (tdep->pauth_reg_base);
266 CORE_ADDR cmask = frame_unwind_register_unsigned (this_frame, cmask_num);
267 addr = addr & ~cmask;
273 /* Analyze a prologue, looking for a recognizable stack frame
274 and frame pointer. Scan until we encounter a store that could
275 clobber the stack frame unexpectedly, or an unknown instruction. */
278 aarch64_analyze_prologue (struct gdbarch *gdbarch,
279 CORE_ADDR start, CORE_ADDR limit,
280 struct aarch64_prologue_cache *cache,
281 abstract_instruction_reader& reader)
283 enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
285 /* Track X registers and D registers in prologue. */
286 pv_t regs[AARCH64_X_REGISTER_COUNT + AARCH64_D_REGISTER_COUNT];
288 for (i = 0; i < AARCH64_X_REGISTER_COUNT + AARCH64_D_REGISTER_COUNT; i++)
289 regs[i] = pv_register (i, 0);
290 pv_area stack (AARCH64_SP_REGNUM, gdbarch_addr_bit (gdbarch));
292 for (; start < limit; start += 4)
297 insn = reader.read (start, 4, byte_order_for_code);
299 if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0)
302 if (inst.opcode->iclass == addsub_imm
303 && (inst.opcode->op == OP_ADD
304 || strcmp ("sub", inst.opcode->name) == 0))
306 unsigned rd = inst.operands[0].reg.regno;
307 unsigned rn = inst.operands[1].reg.regno;
309 gdb_assert (aarch64_num_of_operands (inst.opcode) == 3);
310 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd_SP);
311 gdb_assert (inst.operands[1].type == AARCH64_OPND_Rn_SP);
312 gdb_assert (inst.operands[2].type == AARCH64_OPND_AIMM);
314 if (inst.opcode->op == OP_ADD)
316 regs[rd] = pv_add_constant (regs[rn],
317 inst.operands[2].imm.value);
321 regs[rd] = pv_add_constant (regs[rn],
322 -inst.operands[2].imm.value);
325 else if (inst.opcode->iclass == pcreladdr
326 && inst.operands[1].type == AARCH64_OPND_ADDR_ADRP)
328 gdb_assert (aarch64_num_of_operands (inst.opcode) == 2);
329 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd);
331 regs[inst.operands[0].reg.regno] = pv_unknown ();
333 else if (inst.opcode->iclass == branch_imm)
335 /* Stop analysis on branch. */
338 else if (inst.opcode->iclass == condbranch)
340 /* Stop analysis on branch. */
343 else if (inst.opcode->iclass == branch_reg)
345 /* Stop analysis on branch. */
348 else if (inst.opcode->iclass == compbranch)
350 /* Stop analysis on branch. */
353 else if (inst.opcode->op == OP_MOVZ)
355 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd);
356 regs[inst.operands[0].reg.regno] = pv_unknown ();
358 else if (inst.opcode->iclass == log_shift
359 && strcmp (inst.opcode->name, "orr") == 0)
361 unsigned rd = inst.operands[0].reg.regno;
362 unsigned rn = inst.operands[1].reg.regno;
363 unsigned rm = inst.operands[2].reg.regno;
365 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd);
366 gdb_assert (inst.operands[1].type == AARCH64_OPND_Rn);
367 gdb_assert (inst.operands[2].type == AARCH64_OPND_Rm_SFT);
369 if (inst.operands[2].shifter.amount == 0
370 && rn == AARCH64_SP_REGNUM)
376 debug_printf ("aarch64: prologue analysis gave up "
377 "addr=%s opcode=0x%x (orr x register)\n",
378 core_addr_to_string_nz (start), insn);
383 else if (inst.opcode->op == OP_STUR)
385 unsigned rt = inst.operands[0].reg.regno;
386 unsigned rn = inst.operands[1].addr.base_regno;
388 = (aarch64_get_qualifier_esize (inst.operands[0].qualifier) == 8);
390 gdb_assert (aarch64_num_of_operands (inst.opcode) == 2);
391 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt);
392 gdb_assert (inst.operands[1].type == AARCH64_OPND_ADDR_SIMM9);
393 gdb_assert (!inst.operands[1].addr.offset.is_reg);
395 stack.store (pv_add_constant (regs[rn],
396 inst.operands[1].addr.offset.imm),
397 is64 ? 8 : 4, regs[rt]);
399 else if ((inst.opcode->iclass == ldstpair_off
400 || (inst.opcode->iclass == ldstpair_indexed
401 && inst.operands[2].addr.preind))
402 && strcmp ("stp", inst.opcode->name) == 0)
404 /* STP with addressing mode Pre-indexed and Base register. */
407 unsigned rn = inst.operands[2].addr.base_regno;
408 int32_t imm = inst.operands[2].addr.offset.imm;
410 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt
411 || inst.operands[0].type == AARCH64_OPND_Ft);
412 gdb_assert (inst.operands[1].type == AARCH64_OPND_Rt2
413 || inst.operands[1].type == AARCH64_OPND_Ft2);
414 gdb_assert (inst.operands[2].type == AARCH64_OPND_ADDR_SIMM7);
415 gdb_assert (!inst.operands[2].addr.offset.is_reg);
417 /* If recording this store would invalidate the store area
418 (perhaps because rn is not known) then we should abandon
419 further prologue analysis. */
420 if (stack.store_would_trash (pv_add_constant (regs[rn], imm)))
423 if (stack.store_would_trash (pv_add_constant (regs[rn], imm + 8)))
426 rt1 = inst.operands[0].reg.regno;
427 rt2 = inst.operands[1].reg.regno;
428 if (inst.operands[0].type == AARCH64_OPND_Ft)
430 /* Only bottom 64-bit of each V register (D register) need
432 gdb_assert (inst.operands[0].qualifier == AARCH64_OPND_QLF_S_D);
433 rt1 += AARCH64_X_REGISTER_COUNT;
434 rt2 += AARCH64_X_REGISTER_COUNT;
437 stack.store (pv_add_constant (regs[rn], imm), 8,
439 stack.store (pv_add_constant (regs[rn], imm + 8), 8,
442 if (inst.operands[2].addr.writeback)
443 regs[rn] = pv_add_constant (regs[rn], imm);
446 else if ((inst.opcode->iclass == ldst_imm9 /* Signed immediate. */
447 || (inst.opcode->iclass == ldst_pos /* Unsigned immediate. */
448 && (inst.opcode->op == OP_STR_POS
449 || inst.opcode->op == OP_STRF_POS)))
450 && inst.operands[1].addr.base_regno == AARCH64_SP_REGNUM
451 && strcmp ("str", inst.opcode->name) == 0)
453 /* STR (immediate) */
454 unsigned int rt = inst.operands[0].reg.regno;
455 int32_t imm = inst.operands[1].addr.offset.imm;
456 unsigned int rn = inst.operands[1].addr.base_regno;
458 = (aarch64_get_qualifier_esize (inst.operands[0].qualifier) == 8);
459 gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt
460 || inst.operands[0].type == AARCH64_OPND_Ft);
462 if (inst.operands[0].type == AARCH64_OPND_Ft)
464 /* Only bottom 64-bit of each V register (D register) need
466 gdb_assert (inst.operands[0].qualifier == AARCH64_OPND_QLF_S_D);
467 rt += AARCH64_X_REGISTER_COUNT;
470 stack.store (pv_add_constant (regs[rn], imm),
471 is64 ? 8 : 4, regs[rt]);
472 if (inst.operands[1].addr.writeback)
473 regs[rn] = pv_add_constant (regs[rn], imm);
475 else if (inst.opcode->iclass == testbranch)
477 /* Stop analysis on branch. */
480 else if (inst.opcode->iclass == ic_system)
482 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
483 int ra_state_val = 0;
485 if (insn == 0xd503233f /* paciasp. */
486 || insn == 0xd503237f /* pacibsp. */)
488 /* Return addresses are mangled. */
491 else if (insn == 0xd50323bf /* autiasp. */
492 || insn == 0xd50323ff /* autibsp. */)
494 /* Return addresses are not mangled. */
500 debug_printf ("aarch64: prologue analysis gave up addr=%s"
501 " opcode=0x%x (iclass)\n",
502 core_addr_to_string_nz (start), insn);
506 if (tdep->has_pauth () && cache != nullptr)
507 trad_frame_set_value (cache->saved_regs,
508 tdep->pauth_ra_state_regnum,
515 debug_printf ("aarch64: prologue analysis gave up addr=%s"
517 core_addr_to_string_nz (start), insn);
526 if (pv_is_register (regs[AARCH64_FP_REGNUM], AARCH64_SP_REGNUM))
528 /* Frame pointer is fp. Frame size is constant. */
529 cache->framereg = AARCH64_FP_REGNUM;
530 cache->framesize = -regs[AARCH64_FP_REGNUM].k;
532 else if (pv_is_register (regs[AARCH64_SP_REGNUM], AARCH64_SP_REGNUM))
534 /* Try the stack pointer. */
535 cache->framesize = -regs[AARCH64_SP_REGNUM].k;
536 cache->framereg = AARCH64_SP_REGNUM;
540 /* We're just out of luck. We don't know where the frame is. */
541 cache->framereg = -1;
542 cache->framesize = 0;
545 for (i = 0; i < AARCH64_X_REGISTER_COUNT; i++)
549 if (stack.find_reg (gdbarch, i, &offset))
550 cache->saved_regs[i].addr = offset;
553 for (i = 0; i < AARCH64_D_REGISTER_COUNT; i++)
555 int regnum = gdbarch_num_regs (gdbarch);
558 if (stack.find_reg (gdbarch, i + AARCH64_X_REGISTER_COUNT,
560 cache->saved_regs[i + regnum + AARCH64_D0_REGNUM].addr = offset;
567 aarch64_analyze_prologue (struct gdbarch *gdbarch,
568 CORE_ADDR start, CORE_ADDR limit,
569 struct aarch64_prologue_cache *cache)
571 instruction_reader reader;
573 return aarch64_analyze_prologue (gdbarch, start, limit, cache,
579 namespace selftests {
581 /* Instruction reader from manually cooked instruction sequences. */
583 class instruction_reader_test : public abstract_instruction_reader
586 template<size_t SIZE>
587 explicit instruction_reader_test (const uint32_t (&insns)[SIZE])
588 : m_insns (insns), m_insns_size (SIZE)
591 ULONGEST read (CORE_ADDR memaddr, int len, enum bfd_endian byte_order)
594 SELF_CHECK (len == 4);
595 SELF_CHECK (memaddr % 4 == 0);
596 SELF_CHECK (memaddr / 4 < m_insns_size);
598 return m_insns[memaddr / 4];
602 const uint32_t *m_insns;
607 aarch64_analyze_prologue_test (void)
609 struct gdbarch_info info;
611 gdbarch_info_init (&info);
612 info.bfd_arch_info = bfd_scan_arch ("aarch64");
614 struct gdbarch *gdbarch = gdbarch_find_by_info (info);
615 SELF_CHECK (gdbarch != NULL);
617 struct aarch64_prologue_cache cache;
618 cache.saved_regs = trad_frame_alloc_saved_regs (gdbarch);
620 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
622 /* Test the simple prologue in which frame pointer is used. */
624 static const uint32_t insns[] = {
625 0xa9af7bfd, /* stp x29, x30, [sp,#-272]! */
626 0x910003fd, /* mov x29, sp */
627 0x97ffffe6, /* bl 0x400580 */
629 instruction_reader_test reader (insns);
631 CORE_ADDR end = aarch64_analyze_prologue (gdbarch, 0, 128, &cache, reader);
632 SELF_CHECK (end == 4 * 2);
634 SELF_CHECK (cache.framereg == AARCH64_FP_REGNUM);
635 SELF_CHECK (cache.framesize == 272);
637 for (int i = 0; i < AARCH64_X_REGISTER_COUNT; i++)
639 if (i == AARCH64_FP_REGNUM)
640 SELF_CHECK (cache.saved_regs[i].addr == -272);
641 else if (i == AARCH64_LR_REGNUM)
642 SELF_CHECK (cache.saved_regs[i].addr == -264);
644 SELF_CHECK (cache.saved_regs[i].addr == -1);
647 for (int i = 0; i < AARCH64_D_REGISTER_COUNT; i++)
649 int regnum = gdbarch_num_regs (gdbarch);
651 SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr
656 /* Test a prologue in which STR is used and frame pointer is not
659 static const uint32_t insns[] = {
660 0xf81d0ff3, /* str x19, [sp, #-48]! */
661 0xb9002fe0, /* str w0, [sp, #44] */
662 0xf90013e1, /* str x1, [sp, #32]*/
663 0xfd000fe0, /* str d0, [sp, #24] */
664 0xaa0203f3, /* mov x19, x2 */
665 0xf94013e0, /* ldr x0, [sp, #32] */
667 instruction_reader_test reader (insns);
669 trad_frame_reset_saved_regs (gdbarch, cache.saved_regs);
670 CORE_ADDR end = aarch64_analyze_prologue (gdbarch, 0, 128, &cache, reader);
672 SELF_CHECK (end == 4 * 5);
674 SELF_CHECK (cache.framereg == AARCH64_SP_REGNUM);
675 SELF_CHECK (cache.framesize == 48);
677 for (int i = 0; i < AARCH64_X_REGISTER_COUNT; i++)
680 SELF_CHECK (cache.saved_regs[i].addr == -16);
682 SELF_CHECK (cache.saved_regs[i].addr == -48);
684 SELF_CHECK (cache.saved_regs[i].addr == -1);
687 for (int i = 0; i < AARCH64_D_REGISTER_COUNT; i++)
689 int regnum = gdbarch_num_regs (gdbarch);
692 SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr
695 SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr
700 /* Test a prologue in which there is a return address signing instruction. */
701 if (tdep->has_pauth ())
703 static const uint32_t insns[] = {
704 0xd503233f, /* paciasp */
705 0xa9bd7bfd, /* stp x29, x30, [sp, #-48]! */
706 0x910003fd, /* mov x29, sp */
707 0xf801c3f3, /* str x19, [sp, #28] */
708 0xb9401fa0, /* ldr x19, [x29, #28] */
710 instruction_reader_test reader (insns);
712 trad_frame_reset_saved_regs (gdbarch, cache.saved_regs);
713 CORE_ADDR end = aarch64_analyze_prologue (gdbarch, 0, 128, &cache,
716 SELF_CHECK (end == 4 * 4);
717 SELF_CHECK (cache.framereg == AARCH64_FP_REGNUM);
718 SELF_CHECK (cache.framesize == 48);
720 for (int i = 0; i < AARCH64_X_REGISTER_COUNT; i++)
723 SELF_CHECK (cache.saved_regs[i].addr == -20);
724 else if (i == AARCH64_FP_REGNUM)
725 SELF_CHECK (cache.saved_regs[i].addr == -48);
726 else if (i == AARCH64_LR_REGNUM)
727 SELF_CHECK (cache.saved_regs[i].addr == -40);
729 SELF_CHECK (cache.saved_regs[i].addr == -1);
732 if (tdep->has_pauth ())
734 SELF_CHECK (trad_frame_value_p (cache.saved_regs,
735 tdep->pauth_ra_state_regnum));
736 SELF_CHECK (cache.saved_regs[tdep->pauth_ra_state_regnum].addr == 1);
740 } // namespace selftests
741 #endif /* GDB_SELF_TEST */
743 /* Implement the "skip_prologue" gdbarch method. */
746 aarch64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
748 CORE_ADDR func_addr, limit_pc;
750 /* See if we can determine the end of the prologue via the symbol
751 table. If so, then return either PC, or the PC after the
752 prologue, whichever is greater. */
753 if (find_pc_partial_function (pc, NULL, &func_addr, NULL))
755 CORE_ADDR post_prologue_pc
756 = skip_prologue_using_sal (gdbarch, func_addr);
758 if (post_prologue_pc != 0)
759 return std::max (pc, post_prologue_pc);
762 /* Can't determine prologue from the symbol table, need to examine
765 /* Find an upper limit on the function prologue using the debug
766 information. If the debug information could not be used to
767 provide that bound, then use an arbitrary large number as the
769 limit_pc = skip_prologue_using_sal (gdbarch, pc);
771 limit_pc = pc + 128; /* Magic. */
773 /* Try disassembling prologue. */
774 return aarch64_analyze_prologue (gdbarch, pc, limit_pc, NULL);
777 /* Scan the function prologue for THIS_FRAME and populate the prologue
781 aarch64_scan_prologue (struct frame_info *this_frame,
782 struct aarch64_prologue_cache *cache)
784 CORE_ADDR block_addr = get_frame_address_in_block (this_frame);
785 CORE_ADDR prologue_start;
786 CORE_ADDR prologue_end;
787 CORE_ADDR prev_pc = get_frame_pc (this_frame);
788 struct gdbarch *gdbarch = get_frame_arch (this_frame);
790 cache->prev_pc = prev_pc;
792 /* Assume we do not find a frame. */
793 cache->framereg = -1;
794 cache->framesize = 0;
796 if (find_pc_partial_function (block_addr, NULL, &prologue_start,
799 struct symtab_and_line sal = find_pc_line (prologue_start, 0);
803 /* No line info so use the current PC. */
804 prologue_end = prev_pc;
806 else if (sal.end < prologue_end)
808 /* The next line begins after the function end. */
809 prologue_end = sal.end;
812 prologue_end = std::min (prologue_end, prev_pc);
813 aarch64_analyze_prologue (gdbarch, prologue_start, prologue_end, cache);
819 frame_loc = get_frame_register_unsigned (this_frame, AARCH64_FP_REGNUM);
823 cache->framereg = AARCH64_FP_REGNUM;
824 cache->framesize = 16;
825 cache->saved_regs[29].addr = 0;
826 cache->saved_regs[30].addr = 8;
830 /* Fill in *CACHE with information about the prologue of *THIS_FRAME. This
831 function may throw an exception if the inferior's registers or memory is
835 aarch64_make_prologue_cache_1 (struct frame_info *this_frame,
836 struct aarch64_prologue_cache *cache)
838 CORE_ADDR unwound_fp;
841 aarch64_scan_prologue (this_frame, cache);
843 if (cache->framereg == -1)
846 unwound_fp = get_frame_register_unsigned (this_frame, cache->framereg);
850 cache->prev_sp = unwound_fp + cache->framesize;
852 /* Calculate actual addresses of saved registers using offsets
853 determined by aarch64_analyze_prologue. */
854 for (reg = 0; reg < gdbarch_num_regs (get_frame_arch (this_frame)); reg++)
855 if (trad_frame_addr_p (cache->saved_regs, reg))
856 cache->saved_regs[reg].addr += cache->prev_sp;
858 cache->func = get_frame_func (this_frame);
860 cache->available_p = 1;
863 /* Allocate and fill in *THIS_CACHE with information about the prologue of
864 *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated.
865 Return a pointer to the current aarch64_prologue_cache in
868 static struct aarch64_prologue_cache *
869 aarch64_make_prologue_cache (struct frame_info *this_frame, void **this_cache)
871 struct aarch64_prologue_cache *cache;
873 if (*this_cache != NULL)
874 return (struct aarch64_prologue_cache *) *this_cache;
876 cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache);
877 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
882 aarch64_make_prologue_cache_1 (this_frame, cache);
884 catch (const gdb_exception_error &ex)
886 if (ex.error != NOT_AVAILABLE_ERROR)
893 /* Implement the "stop_reason" frame_unwind method. */
895 static enum unwind_stop_reason
896 aarch64_prologue_frame_unwind_stop_reason (struct frame_info *this_frame,
899 struct aarch64_prologue_cache *cache
900 = aarch64_make_prologue_cache (this_frame, this_cache);
902 if (!cache->available_p)
903 return UNWIND_UNAVAILABLE;
905 /* Halt the backtrace at "_start". */
906 if (cache->prev_pc <= gdbarch_tdep (get_frame_arch (this_frame))->lowest_pc)
907 return UNWIND_OUTERMOST;
909 /* We've hit a wall, stop. */
910 if (cache->prev_sp == 0)
911 return UNWIND_OUTERMOST;
913 return UNWIND_NO_REASON;
916 /* Our frame ID for a normal frame is the current function's starting
917 PC and the caller's SP when we were called. */
920 aarch64_prologue_this_id (struct frame_info *this_frame,
921 void **this_cache, struct frame_id *this_id)
923 struct aarch64_prologue_cache *cache
924 = aarch64_make_prologue_cache (this_frame, this_cache);
926 if (!cache->available_p)
927 *this_id = frame_id_build_unavailable_stack (cache->func);
929 *this_id = frame_id_build (cache->prev_sp, cache->func);
932 /* Implement the "prev_register" frame_unwind method. */
934 static struct value *
935 aarch64_prologue_prev_register (struct frame_info *this_frame,
936 void **this_cache, int prev_regnum)
938 struct aarch64_prologue_cache *cache
939 = aarch64_make_prologue_cache (this_frame, this_cache);
941 /* If we are asked to unwind the PC, then we need to return the LR
942 instead. The prologue may save PC, but it will point into this
943 frame's prologue, not the next frame's resume location. */
944 if (prev_regnum == AARCH64_PC_REGNUM)
947 struct gdbarch *gdbarch = get_frame_arch (this_frame);
948 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
950 lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM);
952 if (tdep->has_pauth ()
953 && trad_frame_value_p (cache->saved_regs,
954 tdep->pauth_ra_state_regnum))
955 lr = aarch64_frame_unmask_address (tdep, this_frame, lr);
957 return frame_unwind_got_constant (this_frame, prev_regnum, lr);
960 /* SP is generally not saved to the stack, but this frame is
961 identified by the next frame's stack pointer at the time of the
962 call. The value was already reconstructed into PREV_SP. */
975 if (prev_regnum == AARCH64_SP_REGNUM)
976 return frame_unwind_got_constant (this_frame, prev_regnum,
979 return trad_frame_get_prev_register (this_frame, cache->saved_regs,
983 /* AArch64 prologue unwinder. */
984 struct frame_unwind aarch64_prologue_unwind =
987 aarch64_prologue_frame_unwind_stop_reason,
988 aarch64_prologue_this_id,
989 aarch64_prologue_prev_register,
991 default_frame_sniffer
994 /* Allocate and fill in *THIS_CACHE with information about the prologue of
995 *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated.
996 Return a pointer to the current aarch64_prologue_cache in
999 static struct aarch64_prologue_cache *
1000 aarch64_make_stub_cache (struct frame_info *this_frame, void **this_cache)
1002 struct aarch64_prologue_cache *cache;
1004 if (*this_cache != NULL)
1005 return (struct aarch64_prologue_cache *) *this_cache;
1007 cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache);
1008 cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);
1009 *this_cache = cache;
1013 cache->prev_sp = get_frame_register_unsigned (this_frame,
1015 cache->prev_pc = get_frame_pc (this_frame);
1016 cache->available_p = 1;
1018 catch (const gdb_exception_error &ex)
1020 if (ex.error != NOT_AVAILABLE_ERROR)
1027 /* Implement the "stop_reason" frame_unwind method. */
1029 static enum unwind_stop_reason
1030 aarch64_stub_frame_unwind_stop_reason (struct frame_info *this_frame,
1033 struct aarch64_prologue_cache *cache
1034 = aarch64_make_stub_cache (this_frame, this_cache);
1036 if (!cache->available_p)
1037 return UNWIND_UNAVAILABLE;
1039 return UNWIND_NO_REASON;
1042 /* Our frame ID for a stub frame is the current SP and LR. */
1045 aarch64_stub_this_id (struct frame_info *this_frame,
1046 void **this_cache, struct frame_id *this_id)
1048 struct aarch64_prologue_cache *cache
1049 = aarch64_make_stub_cache (this_frame, this_cache);
1051 if (cache->available_p)
1052 *this_id = frame_id_build (cache->prev_sp, cache->prev_pc);
1054 *this_id = frame_id_build_unavailable_stack (cache->prev_pc);
1057 /* Implement the "sniffer" frame_unwind method. */
1060 aarch64_stub_unwind_sniffer (const struct frame_unwind *self,
1061 struct frame_info *this_frame,
1062 void **this_prologue_cache)
1064 CORE_ADDR addr_in_block;
1067 addr_in_block = get_frame_address_in_block (this_frame);
1068 if (in_plt_section (addr_in_block)
1069 /* We also use the stub winder if the target memory is unreadable
1070 to avoid having the prologue unwinder trying to read it. */
1071 || target_read_memory (get_frame_pc (this_frame), dummy, 4) != 0)
1077 /* AArch64 stub unwinder. */
1078 struct frame_unwind aarch64_stub_unwind =
1081 aarch64_stub_frame_unwind_stop_reason,
1082 aarch64_stub_this_id,
1083 aarch64_prologue_prev_register,
1085 aarch64_stub_unwind_sniffer
1088 /* Return the frame base address of *THIS_FRAME. */
1091 aarch64_normal_frame_base (struct frame_info *this_frame, void **this_cache)
1093 struct aarch64_prologue_cache *cache
1094 = aarch64_make_prologue_cache (this_frame, this_cache);
1096 return cache->prev_sp - cache->framesize;
1099 /* AArch64 default frame base information. */
1100 struct frame_base aarch64_normal_base =
1102 &aarch64_prologue_unwind,
1103 aarch64_normal_frame_base,
1104 aarch64_normal_frame_base,
1105 aarch64_normal_frame_base
1108 /* Return the value of the REGNUM register in the previous frame of
1111 static struct value *
1112 aarch64_dwarf2_prev_register (struct frame_info *this_frame,
1113 void **this_cache, int regnum)
1115 struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (this_frame));
1120 case AARCH64_PC_REGNUM:
1121 lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM);
1122 lr = aarch64_frame_unmask_address (tdep, this_frame, lr);
1123 return frame_unwind_got_constant (this_frame, regnum, lr);
1126 internal_error (__FILE__, __LINE__,
1127 _("Unexpected register %d"), regnum);
1131 static const unsigned char op_lit0 = DW_OP_lit0;
1132 static const unsigned char op_lit1 = DW_OP_lit1;
1134 /* Implement the "init_reg" dwarf2_frame_ops method. */
1137 aarch64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum,
1138 struct dwarf2_frame_state_reg *reg,
1139 struct frame_info *this_frame)
1141 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1145 case AARCH64_PC_REGNUM:
1146 reg->how = DWARF2_FRAME_REG_FN;
1147 reg->loc.fn = aarch64_dwarf2_prev_register;
1150 case AARCH64_SP_REGNUM:
1151 reg->how = DWARF2_FRAME_REG_CFA;
1155 /* Init pauth registers. */
1156 if (tdep->has_pauth ())
1158 if (regnum == tdep->pauth_ra_state_regnum)
1160 /* Initialize RA_STATE to zero. */
1161 reg->how = DWARF2_FRAME_REG_SAVED_VAL_EXP;
1162 reg->loc.exp.start = &op_lit0;
1163 reg->loc.exp.len = 1;
1166 else if (regnum == AARCH64_PAUTH_DMASK_REGNUM (tdep->pauth_reg_base)
1167 || regnum == AARCH64_PAUTH_CMASK_REGNUM (tdep->pauth_reg_base))
1169 reg->how = DWARF2_FRAME_REG_SAME_VALUE;
1175 /* Implement the execute_dwarf_cfa_vendor_op method. */
1178 aarch64_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdb_byte op,
1179 struct dwarf2_frame_state *fs)
1181 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1182 struct dwarf2_frame_state_reg *ra_state;
1184 if (op == DW_CFA_AARCH64_negate_ra_state)
1186 /* On systems without pauth, treat as a nop. */
1187 if (!tdep->has_pauth ())
1190 /* Allocate RA_STATE column if it's not allocated yet. */
1191 fs->regs.alloc_regs (AARCH64_DWARF_PAUTH_RA_STATE + 1);
1193 /* Toggle the status of RA_STATE between 0 and 1. */
1194 ra_state = &(fs->regs.reg[AARCH64_DWARF_PAUTH_RA_STATE]);
1195 ra_state->how = DWARF2_FRAME_REG_SAVED_VAL_EXP;
1197 if (ra_state->loc.exp.start == nullptr
1198 || ra_state->loc.exp.start == &op_lit0)
1199 ra_state->loc.exp.start = &op_lit1;
1201 ra_state->loc.exp.start = &op_lit0;
1203 ra_state->loc.exp.len = 1;
1211 /* When arguments must be pushed onto the stack, they go on in reverse
1212 order. The code below implements a FILO (stack) to do this. */
1216 /* Value to pass on stack. It can be NULL if this item is for stack
1218 const gdb_byte *data;
1220 /* Size in bytes of value to pass on stack. */
1224 /* Implement the gdbarch type alignment method, overrides the generic
1225 alignment algorithm for anything that is aarch64 specific. */
1228 aarch64_type_align (gdbarch *gdbarch, struct type *t)
1230 t = check_typedef (t);
1231 if (TYPE_CODE (t) == TYPE_CODE_ARRAY && TYPE_VECTOR (t))
1233 /* Use the natural alignment for vector types (the same for
1234 scalar type), but the maximum alignment is 128-bit. */
1235 if (TYPE_LENGTH (t) > 16)
1238 return TYPE_LENGTH (t);
1241 /* Allow the common code to calculate the alignment. */
1245 /* Worker function for aapcs_is_vfp_call_or_return_candidate.
1247 Return the number of register required, or -1 on failure.
1249 When encountering a base element, if FUNDAMENTAL_TYPE is not set then set it
1250 to the element, else fail if the type of this element does not match the
1254 aapcs_is_vfp_call_or_return_candidate_1 (struct type *type,
1255 struct type **fundamental_type)
1257 if (type == nullptr)
1260 switch (TYPE_CODE (type))
1263 if (TYPE_LENGTH (type) > 16)
1266 if (*fundamental_type == nullptr)
1267 *fundamental_type = type;
1268 else if (TYPE_LENGTH (type) != TYPE_LENGTH (*fundamental_type)
1269 || TYPE_CODE (type) != TYPE_CODE (*fundamental_type))
1274 case TYPE_CODE_COMPLEX:
1276 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type));
1277 if (TYPE_LENGTH (target_type) > 16)
1280 if (*fundamental_type == nullptr)
1281 *fundamental_type = target_type;
1282 else if (TYPE_LENGTH (target_type) != TYPE_LENGTH (*fundamental_type)
1283 || TYPE_CODE (target_type) != TYPE_CODE (*fundamental_type))
1289 case TYPE_CODE_ARRAY:
1291 if (TYPE_VECTOR (type))
1293 if (TYPE_LENGTH (type) != 8 && TYPE_LENGTH (type) != 16)
1296 if (*fundamental_type == nullptr)
1297 *fundamental_type = type;
1298 else if (TYPE_LENGTH (type) != TYPE_LENGTH (*fundamental_type)
1299 || TYPE_CODE (type) != TYPE_CODE (*fundamental_type))
1306 struct type *target_type = TYPE_TARGET_TYPE (type);
1307 int count = aapcs_is_vfp_call_or_return_candidate_1
1308 (target_type, fundamental_type);
1313 count *= (TYPE_LENGTH (type) / TYPE_LENGTH (target_type));
1318 case TYPE_CODE_STRUCT:
1319 case TYPE_CODE_UNION:
1323 for (int i = 0; i < TYPE_NFIELDS (type); i++)
1325 /* Ignore any static fields. */
1326 if (field_is_static (&TYPE_FIELD (type, i)))
1329 struct type *member = check_typedef (TYPE_FIELD_TYPE (type, i));
1331 int sub_count = aapcs_is_vfp_call_or_return_candidate_1
1332 (member, fundamental_type);
1333 if (sub_count == -1)
1338 /* Ensure there is no padding between the fields (allowing for empty
1339 zero length structs) */
1340 int ftype_length = (*fundamental_type == nullptr)
1341 ? 0 : TYPE_LENGTH (*fundamental_type);
1342 if (count * ftype_length != TYPE_LENGTH (type))
1355 /* Return true if an argument, whose type is described by TYPE, can be passed or
1356 returned in simd/fp registers, providing enough parameter passing registers
1357 are available. This is as described in the AAPCS64.
1359 Upon successful return, *COUNT returns the number of needed registers,
1360 *FUNDAMENTAL_TYPE contains the type of those registers.
1362 Candidate as per the AAPCS64 5.4.2.C is either a:
1365 - HFA (Homogeneous Floating-point Aggregate, 4.3.5.1). A Composite type where
1366 all the members are floats and has at most 4 members.
1367 - HVA (Homogeneous Short-vector Aggregate, 4.3.5.2). A Composite type where
1368 all the members are short vectors and has at most 4 members.
1371 Note that HFAs and HVAs can include nested structures and arrays. */
1374 aapcs_is_vfp_call_or_return_candidate (struct type *type, int *count,
1375 struct type **fundamental_type)
1377 if (type == nullptr)
1380 *fundamental_type = nullptr;
1382 int ag_count = aapcs_is_vfp_call_or_return_candidate_1 (type,
1385 if (ag_count > 0 && ag_count <= HA_MAX_NUM_FLDS)
1394 /* AArch64 function call information structure. */
1395 struct aarch64_call_info
1397 /* the current argument number. */
1398 unsigned argnum = 0;
1400 /* The next general purpose register number, equivalent to NGRN as
1401 described in the AArch64 Procedure Call Standard. */
1404 /* The next SIMD and floating point register number, equivalent to
1405 NSRN as described in the AArch64 Procedure Call Standard. */
1408 /* The next stacked argument address, equivalent to NSAA as
1409 described in the AArch64 Procedure Call Standard. */
1412 /* Stack item vector. */
1413 std::vector<stack_item_t> si;
1416 /* Pass a value in a sequence of consecutive X registers. The caller
1417 is responsbile for ensuring sufficient registers are available. */
1420 pass_in_x (struct gdbarch *gdbarch, struct regcache *regcache,
1421 struct aarch64_call_info *info, struct type *type,
1424 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
1425 int len = TYPE_LENGTH (type);
1426 enum type_code typecode = TYPE_CODE (type);
1427 int regnum = AARCH64_X0_REGNUM + info->ngrn;
1428 const bfd_byte *buf = value_contents (arg);
1434 int partial_len = len < X_REGISTER_SIZE ? len : X_REGISTER_SIZE;
1435 CORE_ADDR regval = extract_unsigned_integer (buf, partial_len,
1439 /* Adjust sub-word struct/union args when big-endian. */
1440 if (byte_order == BFD_ENDIAN_BIG
1441 && partial_len < X_REGISTER_SIZE
1442 && (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION))
1443 regval <<= ((X_REGISTER_SIZE - partial_len) * TARGET_CHAR_BIT);
1447 debug_printf ("arg %d in %s = 0x%s\n", info->argnum,
1448 gdbarch_register_name (gdbarch, regnum),
1449 phex (regval, X_REGISTER_SIZE));
1451 regcache_cooked_write_unsigned (regcache, regnum, regval);
1458 /* Attempt to marshall a value in a V register. Return 1 if
1459 successful, or 0 if insufficient registers are available. This
1460 function, unlike the equivalent pass_in_x() function does not
1461 handle arguments spread across multiple registers. */
1464 pass_in_v (struct gdbarch *gdbarch,
1465 struct regcache *regcache,
1466 struct aarch64_call_info *info,
1467 int len, const bfd_byte *buf)
1471 int regnum = AARCH64_V0_REGNUM + info->nsrn;
1472 /* Enough space for a full vector register. */
1473 gdb_byte reg[register_size (gdbarch, regnum)];
1474 gdb_assert (len <= sizeof (reg));
1479 memset (reg, 0, sizeof (reg));
1480 /* PCS C.1, the argument is allocated to the least significant
1481 bits of V register. */
1482 memcpy (reg, buf, len);
1483 regcache->cooked_write (regnum, reg);
1487 debug_printf ("arg %d in %s\n", info->argnum,
1488 gdbarch_register_name (gdbarch, regnum));
1496 /* Marshall an argument onto the stack. */
1499 pass_on_stack (struct aarch64_call_info *info, struct type *type,
1502 const bfd_byte *buf = value_contents (arg);
1503 int len = TYPE_LENGTH (type);
1509 align = type_align (type);
1511 /* PCS C.17 Stack should be aligned to the larger of 8 bytes or the
1512 Natural alignment of the argument's type. */
1513 align = align_up (align, 8);
1515 /* The AArch64 PCS requires at most doubleword alignment. */
1521 debug_printf ("arg %d len=%d @ sp + %d\n", info->argnum, len,
1527 info->si.push_back (item);
1530 if (info->nsaa & (align - 1))
1532 /* Push stack alignment padding. */
1533 int pad = align - (info->nsaa & (align - 1));
1538 info->si.push_back (item);
1543 /* Marshall an argument into a sequence of one or more consecutive X
1544 registers or, if insufficient X registers are available then onto
1548 pass_in_x_or_stack (struct gdbarch *gdbarch, struct regcache *regcache,
1549 struct aarch64_call_info *info, struct type *type,
1552 int len = TYPE_LENGTH (type);
1553 int nregs = (len + X_REGISTER_SIZE - 1) / X_REGISTER_SIZE;
1555 /* PCS C.13 - Pass in registers if we have enough spare */
1556 if (info->ngrn + nregs <= 8)
1558 pass_in_x (gdbarch, regcache, info, type, arg);
1559 info->ngrn += nregs;
1564 pass_on_stack (info, type, arg);
1568 /* Pass a value, which is of type arg_type, in a V register. Assumes value is a
1569 aapcs_is_vfp_call_or_return_candidate and there are enough spare V
1570 registers. A return value of false is an error state as the value will have
1571 been partially passed to the stack. */
1573 pass_in_v_vfp_candidate (struct gdbarch *gdbarch, struct regcache *regcache,
1574 struct aarch64_call_info *info, struct type *arg_type,
1577 switch (TYPE_CODE (arg_type))
1580 return pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (arg_type),
1581 value_contents (arg));
1584 case TYPE_CODE_COMPLEX:
1586 const bfd_byte *buf = value_contents (arg);
1587 struct type *target_type = check_typedef (TYPE_TARGET_TYPE (arg_type));
1589 if (!pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (target_type),
1593 return pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (target_type),
1594 buf + TYPE_LENGTH (target_type));
1597 case TYPE_CODE_ARRAY:
1598 if (TYPE_VECTOR (arg_type))
1599 return pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (arg_type),
1600 value_contents (arg));
1603 case TYPE_CODE_STRUCT:
1604 case TYPE_CODE_UNION:
1605 for (int i = 0; i < TYPE_NFIELDS (arg_type); i++)
1607 /* Don't include static fields. */
1608 if (field_is_static (&TYPE_FIELD (arg_type, i)))
1611 struct value *field = value_primitive_field (arg, 0, i, arg_type);
1612 struct type *field_type = check_typedef (value_type (field));
1614 if (!pass_in_v_vfp_candidate (gdbarch, regcache, info, field_type,
1625 /* Implement the "push_dummy_call" gdbarch method. */
1628 aarch64_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
1629 struct regcache *regcache, CORE_ADDR bp_addr,
1631 struct value **args, CORE_ADDR sp,
1632 function_call_return_method return_method,
1633 CORE_ADDR struct_addr)
1636 struct aarch64_call_info info;
1638 /* We need to know what the type of the called function is in order
1639 to determine the number of named/anonymous arguments for the
1640 actual argument placement, and the return type in order to handle
1641 return value correctly.
1643 The generic code above us views the decision of return in memory
1644 or return in registers as a two stage processes. The language
1645 handler is consulted first and may decide to return in memory (eg
1646 class with copy constructor returned by value), this will cause
1647 the generic code to allocate space AND insert an initial leading
1650 If the language code does not decide to pass in memory then the
1651 target code is consulted.
1653 If the language code decides to pass in memory we want to move
1654 the pointer inserted as the initial argument from the argument
1655 list and into X8, the conventional AArch64 struct return pointer
1658 /* Set the return address. For the AArch64, the return breakpoint
1659 is always at BP_ADDR. */
1660 regcache_cooked_write_unsigned (regcache, AARCH64_LR_REGNUM, bp_addr);
1662 /* If we were given an initial argument for the return slot, lose it. */
1663 if (return_method == return_method_hidden_param)
1669 /* The struct_return pointer occupies X8. */
1670 if (return_method != return_method_normal)
1674 debug_printf ("struct return in %s = 0x%s\n",
1675 gdbarch_register_name (gdbarch,
1676 AARCH64_STRUCT_RETURN_REGNUM),
1677 paddress (gdbarch, struct_addr));
1679 regcache_cooked_write_unsigned (regcache, AARCH64_STRUCT_RETURN_REGNUM,
1683 for (argnum = 0; argnum < nargs; argnum++)
1685 struct value *arg = args[argnum];
1686 struct type *arg_type, *fundamental_type;
1689 arg_type = check_typedef (value_type (arg));
1690 len = TYPE_LENGTH (arg_type);
1692 /* If arg can be passed in v registers as per the AAPCS64, then do so if
1693 if there are enough spare registers. */
1694 if (aapcs_is_vfp_call_or_return_candidate (arg_type, &elements,
1697 if (info.nsrn + elements <= 8)
1699 /* We know that we have sufficient registers available therefore
1700 this will never need to fallback to the stack. */
1701 if (!pass_in_v_vfp_candidate (gdbarch, regcache, &info, arg_type,
1703 gdb_assert_not_reached ("Failed to push args");
1708 pass_on_stack (&info, arg_type, arg);
1713 switch (TYPE_CODE (arg_type))
1716 case TYPE_CODE_BOOL:
1717 case TYPE_CODE_CHAR:
1718 case TYPE_CODE_RANGE:
1719 case TYPE_CODE_ENUM:
1722 /* Promote to 32 bit integer. */
1723 if (TYPE_UNSIGNED (arg_type))
1724 arg_type = builtin_type (gdbarch)->builtin_uint32;
1726 arg_type = builtin_type (gdbarch)->builtin_int32;
1727 arg = value_cast (arg_type, arg);
1729 pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
1732 case TYPE_CODE_STRUCT:
1733 case TYPE_CODE_ARRAY:
1734 case TYPE_CODE_UNION:
1737 /* PCS B.7 Aggregates larger than 16 bytes are passed by
1738 invisible reference. */
1740 /* Allocate aligned storage. */
1741 sp = align_down (sp - len, 16);
1743 /* Write the real data into the stack. */
1744 write_memory (sp, value_contents (arg), len);
1746 /* Construct the indirection. */
1747 arg_type = lookup_pointer_type (arg_type);
1748 arg = value_from_pointer (arg_type, sp);
1749 pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
1752 /* PCS C.15 / C.18 multiple values pass. */
1753 pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
1757 pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg);
1762 /* Make sure stack retains 16 byte alignment. */
1764 sp -= 16 - (info.nsaa & 15);
1766 while (!info.si.empty ())
1768 const stack_item_t &si = info.si.back ();
1771 if (si.data != NULL)
1772 write_memory (sp, si.data, si.len);
1773 info.si.pop_back ();
1776 /* Finally, update the SP register. */
1777 regcache_cooked_write_unsigned (regcache, AARCH64_SP_REGNUM, sp);
1782 /* Implement the "frame_align" gdbarch method. */
1785 aarch64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
1787 /* Align the stack to sixteen bytes. */
1788 return sp & ~(CORE_ADDR) 15;
1791 /* Return the type for an AdvSISD Q register. */
1793 static struct type *
1794 aarch64_vnq_type (struct gdbarch *gdbarch)
1796 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1798 if (tdep->vnq_type == NULL)
1803 t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnq",
1806 elem = builtin_type (gdbarch)->builtin_uint128;
1807 append_composite_type_field (t, "u", elem);
1809 elem = builtin_type (gdbarch)->builtin_int128;
1810 append_composite_type_field (t, "s", elem);
1815 return tdep->vnq_type;
1818 /* Return the type for an AdvSISD D register. */
1820 static struct type *
1821 aarch64_vnd_type (struct gdbarch *gdbarch)
1823 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1825 if (tdep->vnd_type == NULL)
1830 t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnd",
1833 elem = builtin_type (gdbarch)->builtin_double;
1834 append_composite_type_field (t, "f", elem);
1836 elem = builtin_type (gdbarch)->builtin_uint64;
1837 append_composite_type_field (t, "u", elem);
1839 elem = builtin_type (gdbarch)->builtin_int64;
1840 append_composite_type_field (t, "s", elem);
1845 return tdep->vnd_type;
1848 /* Return the type for an AdvSISD S register. */
1850 static struct type *
1851 aarch64_vns_type (struct gdbarch *gdbarch)
1853 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1855 if (tdep->vns_type == NULL)
1860 t = arch_composite_type (gdbarch, "__gdb_builtin_type_vns",
1863 elem = builtin_type (gdbarch)->builtin_float;
1864 append_composite_type_field (t, "f", elem);
1866 elem = builtin_type (gdbarch)->builtin_uint32;
1867 append_composite_type_field (t, "u", elem);
1869 elem = builtin_type (gdbarch)->builtin_int32;
1870 append_composite_type_field (t, "s", elem);
1875 return tdep->vns_type;
1878 /* Return the type for an AdvSISD H register. */
1880 static struct type *
1881 aarch64_vnh_type (struct gdbarch *gdbarch)
1883 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1885 if (tdep->vnh_type == NULL)
1890 t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnh",
1893 elem = builtin_type (gdbarch)->builtin_half;
1894 append_composite_type_field (t, "f", elem);
1896 elem = builtin_type (gdbarch)->builtin_uint16;
1897 append_composite_type_field (t, "u", elem);
1899 elem = builtin_type (gdbarch)->builtin_int16;
1900 append_composite_type_field (t, "s", elem);
1905 return tdep->vnh_type;
1908 /* Return the type for an AdvSISD B register. */
1910 static struct type *
1911 aarch64_vnb_type (struct gdbarch *gdbarch)
1913 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1915 if (tdep->vnb_type == NULL)
1920 t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnb",
1923 elem = builtin_type (gdbarch)->builtin_uint8;
1924 append_composite_type_field (t, "u", elem);
1926 elem = builtin_type (gdbarch)->builtin_int8;
1927 append_composite_type_field (t, "s", elem);
1932 return tdep->vnb_type;
1935 /* Return the type for an AdvSISD V register. */
1937 static struct type *
1938 aarch64_vnv_type (struct gdbarch *gdbarch)
1940 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
1942 if (tdep->vnv_type == NULL)
1944 /* The other AArch64 psuedo registers (Q,D,H,S,B) refer to a single value
1945 slice from the non-pseudo vector registers. However NEON V registers
1946 are always vector registers, and need constructing as such. */
1947 const struct builtin_type *bt = builtin_type (gdbarch);
1949 struct type *t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnv",
1952 struct type *sub = arch_composite_type (gdbarch, "__gdb_builtin_type_vnd",
1954 append_composite_type_field (sub, "f",
1955 init_vector_type (bt->builtin_double, 2));
1956 append_composite_type_field (sub, "u",
1957 init_vector_type (bt->builtin_uint64, 2));
1958 append_composite_type_field (sub, "s",
1959 init_vector_type (bt->builtin_int64, 2));
1960 append_composite_type_field (t, "d", sub);
1962 sub = arch_composite_type (gdbarch, "__gdb_builtin_type_vns",
1964 append_composite_type_field (sub, "f",
1965 init_vector_type (bt->builtin_float, 4));
1966 append_composite_type_field (sub, "u",
1967 init_vector_type (bt->builtin_uint32, 4));
1968 append_composite_type_field (sub, "s",
1969 init_vector_type (bt->builtin_int32, 4));
1970 append_composite_type_field (t, "s", sub);
1972 sub = arch_composite_type (gdbarch, "__gdb_builtin_type_vnh",
1974 append_composite_type_field (sub, "f",
1975 init_vector_type (bt->builtin_half, 8));
1976 append_composite_type_field (sub, "u",
1977 init_vector_type (bt->builtin_uint16, 8));
1978 append_composite_type_field (sub, "s",
1979 init_vector_type (bt->builtin_int16, 8));
1980 append_composite_type_field (t, "h", sub);
1982 sub = arch_composite_type (gdbarch, "__gdb_builtin_type_vnb",
1984 append_composite_type_field (sub, "u",
1985 init_vector_type (bt->builtin_uint8, 16));
1986 append_composite_type_field (sub, "s",
1987 init_vector_type (bt->builtin_int8, 16));
1988 append_composite_type_field (t, "b", sub);
1990 sub = arch_composite_type (gdbarch, "__gdb_builtin_type_vnq",
1992 append_composite_type_field (sub, "u",
1993 init_vector_type (bt->builtin_uint128, 1));
1994 append_composite_type_field (sub, "s",
1995 init_vector_type (bt->builtin_int128, 1));
1996 append_composite_type_field (t, "q", sub);
2001 return tdep->vnv_type;
2004 /* Implement the "dwarf2_reg_to_regnum" gdbarch method. */
2007 aarch64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg)
2009 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2011 if (reg >= AARCH64_DWARF_X0 && reg <= AARCH64_DWARF_X0 + 30)
2012 return AARCH64_X0_REGNUM + reg - AARCH64_DWARF_X0;
2014 if (reg == AARCH64_DWARF_SP)
2015 return AARCH64_SP_REGNUM;
2017 if (reg >= AARCH64_DWARF_V0 && reg <= AARCH64_DWARF_V0 + 31)
2018 return AARCH64_V0_REGNUM + reg - AARCH64_DWARF_V0;
2020 if (reg == AARCH64_DWARF_SVE_VG)
2021 return AARCH64_SVE_VG_REGNUM;
2023 if (reg == AARCH64_DWARF_SVE_FFR)
2024 return AARCH64_SVE_FFR_REGNUM;
2026 if (reg >= AARCH64_DWARF_SVE_P0 && reg <= AARCH64_DWARF_SVE_P0 + 15)
2027 return AARCH64_SVE_P0_REGNUM + reg - AARCH64_DWARF_SVE_P0;
2029 if (reg >= AARCH64_DWARF_SVE_Z0 && reg <= AARCH64_DWARF_SVE_Z0 + 15)
2030 return AARCH64_SVE_Z0_REGNUM + reg - AARCH64_DWARF_SVE_Z0;
2032 if (tdep->has_pauth ())
2034 if (reg >= AARCH64_DWARF_PAUTH_DMASK && reg <= AARCH64_DWARF_PAUTH_CMASK)
2035 return tdep->pauth_reg_base + reg - AARCH64_DWARF_PAUTH_DMASK;
2037 if (reg == AARCH64_DWARF_PAUTH_RA_STATE)
2038 return tdep->pauth_ra_state_regnum;
2044 /* Implement the "print_insn" gdbarch method. */
2047 aarch64_gdb_print_insn (bfd_vma memaddr, disassemble_info *info)
2049 info->symbols = NULL;
2050 return default_print_insn (memaddr, info);
2053 /* AArch64 BRK software debug mode instruction.
2054 Note that AArch64 code is always little-endian.
2055 1101.0100.0010.0000.0000.0000.0000.0000 = 0xd4200000. */
2056 constexpr gdb_byte aarch64_default_breakpoint[] = {0x00, 0x00, 0x20, 0xd4};
2058 typedef BP_MANIPULATION (aarch64_default_breakpoint) aarch64_breakpoint;
2060 /* Extract from an array REGS containing the (raw) register state a
2061 function return value of type TYPE, and copy that, in virtual
2062 format, into VALBUF. */
2065 aarch64_extract_return_value (struct type *type, struct regcache *regs,
2068 struct gdbarch *gdbarch = regs->arch ();
2069 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2071 struct type *fundamental_type;
2073 if (aapcs_is_vfp_call_or_return_candidate (type, &elements,
2076 int len = TYPE_LENGTH (fundamental_type);
2078 for (int i = 0; i < elements; i++)
2080 int regno = AARCH64_V0_REGNUM + i;
2081 /* Enough space for a full vector register. */
2082 gdb_byte buf[register_size (gdbarch, regno)];
2083 gdb_assert (len <= sizeof (buf));
2087 debug_printf ("read HFA or HVA return value element %d from %s\n",
2089 gdbarch_register_name (gdbarch, regno));
2091 regs->cooked_read (regno, buf);
2093 memcpy (valbuf, buf, len);
2097 else if (TYPE_CODE (type) == TYPE_CODE_INT
2098 || TYPE_CODE (type) == TYPE_CODE_CHAR
2099 || TYPE_CODE (type) == TYPE_CODE_BOOL
2100 || TYPE_CODE (type) == TYPE_CODE_PTR
2101 || TYPE_IS_REFERENCE (type)
2102 || TYPE_CODE (type) == TYPE_CODE_ENUM)
2104 /* If the type is a plain integer, then the access is
2105 straight-forward. Otherwise we have to play around a bit
2107 int len = TYPE_LENGTH (type);
2108 int regno = AARCH64_X0_REGNUM;
2113 /* By using store_unsigned_integer we avoid having to do
2114 anything special for small big-endian values. */
2115 regcache_cooked_read_unsigned (regs, regno++, &tmp);
2116 store_unsigned_integer (valbuf,
2117 (len > X_REGISTER_SIZE
2118 ? X_REGISTER_SIZE : len), byte_order, tmp);
2119 len -= X_REGISTER_SIZE;
2120 valbuf += X_REGISTER_SIZE;
2125 /* For a structure or union the behaviour is as if the value had
2126 been stored to word-aligned memory and then loaded into
2127 registers with 64-bit load instruction(s). */
2128 int len = TYPE_LENGTH (type);
2129 int regno = AARCH64_X0_REGNUM;
2130 bfd_byte buf[X_REGISTER_SIZE];
2134 regs->cooked_read (regno++, buf);
2135 memcpy (valbuf, buf, len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len);
2136 len -= X_REGISTER_SIZE;
2137 valbuf += X_REGISTER_SIZE;
2143 /* Will a function return an aggregate type in memory or in a
2144 register? Return 0 if an aggregate type can be returned in a
2145 register, 1 if it must be returned in memory. */
2148 aarch64_return_in_memory (struct gdbarch *gdbarch, struct type *type)
2150 type = check_typedef (type);
2152 struct type *fundamental_type;
2154 if (aapcs_is_vfp_call_or_return_candidate (type, &elements,
2157 /* v0-v7 are used to return values and one register is allocated
2158 for one member. However, HFA or HVA has at most four members. */
2162 if (TYPE_LENGTH (type) > 16)
2164 /* PCS B.6 Aggregates larger than 16 bytes are passed by
2165 invisible reference. */
2173 /* Write into appropriate registers a function return value of type
2174 TYPE, given in virtual format. */
2177 aarch64_store_return_value (struct type *type, struct regcache *regs,
2178 const gdb_byte *valbuf)
2180 struct gdbarch *gdbarch = regs->arch ();
2181 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2183 struct type *fundamental_type;
2185 if (aapcs_is_vfp_call_or_return_candidate (type, &elements,
2188 int len = TYPE_LENGTH (fundamental_type);
2190 for (int i = 0; i < elements; i++)
2192 int regno = AARCH64_V0_REGNUM + i;
2193 /* Enough space for a full vector register. */
2194 gdb_byte tmpbuf[register_size (gdbarch, regno)];
2195 gdb_assert (len <= sizeof (tmpbuf));
2199 debug_printf ("write HFA or HVA return value element %d to %s\n",
2201 gdbarch_register_name (gdbarch, regno));
2204 memcpy (tmpbuf, valbuf,
2205 len > V_REGISTER_SIZE ? V_REGISTER_SIZE : len);
2206 regs->cooked_write (regno, tmpbuf);
2210 else if (TYPE_CODE (type) == TYPE_CODE_INT
2211 || TYPE_CODE (type) == TYPE_CODE_CHAR
2212 || TYPE_CODE (type) == TYPE_CODE_BOOL
2213 || TYPE_CODE (type) == TYPE_CODE_PTR
2214 || TYPE_IS_REFERENCE (type)
2215 || TYPE_CODE (type) == TYPE_CODE_ENUM)
2217 if (TYPE_LENGTH (type) <= X_REGISTER_SIZE)
2219 /* Values of one word or less are zero/sign-extended and
2221 bfd_byte tmpbuf[X_REGISTER_SIZE];
2222 LONGEST val = unpack_long (type, valbuf);
2224 store_signed_integer (tmpbuf, X_REGISTER_SIZE, byte_order, val);
2225 regs->cooked_write (AARCH64_X0_REGNUM, tmpbuf);
2229 /* Integral values greater than one word are stored in
2230 consecutive registers starting with r0. This will always
2231 be a multiple of the regiser size. */
2232 int len = TYPE_LENGTH (type);
2233 int regno = AARCH64_X0_REGNUM;
2237 regs->cooked_write (regno++, valbuf);
2238 len -= X_REGISTER_SIZE;
2239 valbuf += X_REGISTER_SIZE;
2245 /* For a structure or union the behaviour is as if the value had
2246 been stored to word-aligned memory and then loaded into
2247 registers with 64-bit load instruction(s). */
2248 int len = TYPE_LENGTH (type);
2249 int regno = AARCH64_X0_REGNUM;
2250 bfd_byte tmpbuf[X_REGISTER_SIZE];
2254 memcpy (tmpbuf, valbuf,
2255 len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len);
2256 regs->cooked_write (regno++, tmpbuf);
2257 len -= X_REGISTER_SIZE;
2258 valbuf += X_REGISTER_SIZE;
2263 /* Implement the "return_value" gdbarch method. */
2265 static enum return_value_convention
2266 aarch64_return_value (struct gdbarch *gdbarch, struct value *func_value,
2267 struct type *valtype, struct regcache *regcache,
2268 gdb_byte *readbuf, const gdb_byte *writebuf)
2271 if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT
2272 || TYPE_CODE (valtype) == TYPE_CODE_UNION
2273 || TYPE_CODE (valtype) == TYPE_CODE_ARRAY)
2275 if (aarch64_return_in_memory (gdbarch, valtype))
2278 debug_printf ("return value in memory\n");
2279 return RETURN_VALUE_STRUCT_CONVENTION;
2284 aarch64_store_return_value (valtype, regcache, writebuf);
2287 aarch64_extract_return_value (valtype, regcache, readbuf);
2290 debug_printf ("return value in registers\n");
2292 return RETURN_VALUE_REGISTER_CONVENTION;
2295 /* Implement the "get_longjmp_target" gdbarch method. */
2298 aarch64_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc)
2301 gdb_byte buf[X_REGISTER_SIZE];
2302 struct gdbarch *gdbarch = get_frame_arch (frame);
2303 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2304 enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
2306 jb_addr = get_frame_register_unsigned (frame, AARCH64_X0_REGNUM);
2308 if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf,
2312 *pc = extract_unsigned_integer (buf, X_REGISTER_SIZE, byte_order);
2316 /* Implement the "gen_return_address" gdbarch method. */
2319 aarch64_gen_return_address (struct gdbarch *gdbarch,
2320 struct agent_expr *ax, struct axs_value *value,
2323 value->type = register_type (gdbarch, AARCH64_LR_REGNUM);
2324 value->kind = axs_lvalue_register;
2325 value->u.reg = AARCH64_LR_REGNUM;
2329 /* Return the pseudo register name corresponding to register regnum. */
2332 aarch64_pseudo_register_name (struct gdbarch *gdbarch, int regnum)
2334 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2336 static const char *const q_name[] =
2338 "q0", "q1", "q2", "q3",
2339 "q4", "q5", "q6", "q7",
2340 "q8", "q9", "q10", "q11",
2341 "q12", "q13", "q14", "q15",
2342 "q16", "q17", "q18", "q19",
2343 "q20", "q21", "q22", "q23",
2344 "q24", "q25", "q26", "q27",
2345 "q28", "q29", "q30", "q31",
2348 static const char *const d_name[] =
2350 "d0", "d1", "d2", "d3",
2351 "d4", "d5", "d6", "d7",
2352 "d8", "d9", "d10", "d11",
2353 "d12", "d13", "d14", "d15",
2354 "d16", "d17", "d18", "d19",
2355 "d20", "d21", "d22", "d23",
2356 "d24", "d25", "d26", "d27",
2357 "d28", "d29", "d30", "d31",
2360 static const char *const s_name[] =
2362 "s0", "s1", "s2", "s3",
2363 "s4", "s5", "s6", "s7",
2364 "s8", "s9", "s10", "s11",
2365 "s12", "s13", "s14", "s15",
2366 "s16", "s17", "s18", "s19",
2367 "s20", "s21", "s22", "s23",
2368 "s24", "s25", "s26", "s27",
2369 "s28", "s29", "s30", "s31",
2372 static const char *const h_name[] =
2374 "h0", "h1", "h2", "h3",
2375 "h4", "h5", "h6", "h7",
2376 "h8", "h9", "h10", "h11",
2377 "h12", "h13", "h14", "h15",
2378 "h16", "h17", "h18", "h19",
2379 "h20", "h21", "h22", "h23",
2380 "h24", "h25", "h26", "h27",
2381 "h28", "h29", "h30", "h31",
2384 static const char *const b_name[] =
2386 "b0", "b1", "b2", "b3",
2387 "b4", "b5", "b6", "b7",
2388 "b8", "b9", "b10", "b11",
2389 "b12", "b13", "b14", "b15",
2390 "b16", "b17", "b18", "b19",
2391 "b20", "b21", "b22", "b23",
2392 "b24", "b25", "b26", "b27",
2393 "b28", "b29", "b30", "b31",
2396 int p_regnum = regnum - gdbarch_num_regs (gdbarch);
2398 if (p_regnum >= AARCH64_Q0_REGNUM && p_regnum < AARCH64_Q0_REGNUM + 32)
2399 return q_name[p_regnum - AARCH64_Q0_REGNUM];
2401 if (p_regnum >= AARCH64_D0_REGNUM && p_regnum < AARCH64_D0_REGNUM + 32)
2402 return d_name[p_regnum - AARCH64_D0_REGNUM];
2404 if (p_regnum >= AARCH64_S0_REGNUM && p_regnum < AARCH64_S0_REGNUM + 32)
2405 return s_name[p_regnum - AARCH64_S0_REGNUM];
2407 if (p_regnum >= AARCH64_H0_REGNUM && p_regnum < AARCH64_H0_REGNUM + 32)
2408 return h_name[p_regnum - AARCH64_H0_REGNUM];
2410 if (p_regnum >= AARCH64_B0_REGNUM && p_regnum < AARCH64_B0_REGNUM + 32)
2411 return b_name[p_regnum - AARCH64_B0_REGNUM];
2413 if (tdep->has_sve ())
2415 static const char *const sve_v_name[] =
2417 "v0", "v1", "v2", "v3",
2418 "v4", "v5", "v6", "v7",
2419 "v8", "v9", "v10", "v11",
2420 "v12", "v13", "v14", "v15",
2421 "v16", "v17", "v18", "v19",
2422 "v20", "v21", "v22", "v23",
2423 "v24", "v25", "v26", "v27",
2424 "v28", "v29", "v30", "v31",
2427 if (p_regnum >= AARCH64_SVE_V0_REGNUM
2428 && p_regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM)
2429 return sve_v_name[p_regnum - AARCH64_SVE_V0_REGNUM];
2432 /* RA_STATE is used for unwinding only. Do not assign it a name - this
2433 prevents it from being read by methods such as
2434 mi_cmd_trace_frame_collected. */
2435 if (tdep->has_pauth () && regnum == tdep->pauth_ra_state_regnum)
2438 internal_error (__FILE__, __LINE__,
2439 _("aarch64_pseudo_register_name: bad register number %d"),
2443 /* Implement the "pseudo_register_type" tdesc_arch_data method. */
2445 static struct type *
2446 aarch64_pseudo_register_type (struct gdbarch *gdbarch, int regnum)
2448 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2450 int p_regnum = regnum - gdbarch_num_regs (gdbarch);
2452 if (p_regnum >= AARCH64_Q0_REGNUM && p_regnum < AARCH64_Q0_REGNUM + 32)
2453 return aarch64_vnq_type (gdbarch);
2455 if (p_regnum >= AARCH64_D0_REGNUM && p_regnum < AARCH64_D0_REGNUM + 32)
2456 return aarch64_vnd_type (gdbarch);
2458 if (p_regnum >= AARCH64_S0_REGNUM && p_regnum < AARCH64_S0_REGNUM + 32)
2459 return aarch64_vns_type (gdbarch);
2461 if (p_regnum >= AARCH64_H0_REGNUM && p_regnum < AARCH64_H0_REGNUM + 32)
2462 return aarch64_vnh_type (gdbarch);
2464 if (p_regnum >= AARCH64_B0_REGNUM && p_regnum < AARCH64_B0_REGNUM + 32)
2465 return aarch64_vnb_type (gdbarch);
2467 if (tdep->has_sve () && p_regnum >= AARCH64_SVE_V0_REGNUM
2468 && p_regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM)
2469 return aarch64_vnv_type (gdbarch);
2471 if (tdep->has_pauth () && regnum == tdep->pauth_ra_state_regnum)
2472 return builtin_type (gdbarch)->builtin_uint64;
2474 internal_error (__FILE__, __LINE__,
2475 _("aarch64_pseudo_register_type: bad register number %d"),
2479 /* Implement the "pseudo_register_reggroup_p" tdesc_arch_data method. */
2482 aarch64_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
2483 struct reggroup *group)
2485 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2487 int p_regnum = regnum - gdbarch_num_regs (gdbarch);
2489 if (p_regnum >= AARCH64_Q0_REGNUM && p_regnum < AARCH64_Q0_REGNUM + 32)
2490 return group == all_reggroup || group == vector_reggroup;
2491 else if (p_regnum >= AARCH64_D0_REGNUM && p_regnum < AARCH64_D0_REGNUM + 32)
2492 return (group == all_reggroup || group == vector_reggroup
2493 || group == float_reggroup);
2494 else if (p_regnum >= AARCH64_S0_REGNUM && p_regnum < AARCH64_S0_REGNUM + 32)
2495 return (group == all_reggroup || group == vector_reggroup
2496 || group == float_reggroup);
2497 else if (p_regnum >= AARCH64_H0_REGNUM && p_regnum < AARCH64_H0_REGNUM + 32)
2498 return group == all_reggroup || group == vector_reggroup;
2499 else if (p_regnum >= AARCH64_B0_REGNUM && p_regnum < AARCH64_B0_REGNUM + 32)
2500 return group == all_reggroup || group == vector_reggroup;
2501 else if (tdep->has_sve () && p_regnum >= AARCH64_SVE_V0_REGNUM
2502 && p_regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM)
2503 return group == all_reggroup || group == vector_reggroup;
2504 /* RA_STATE is used for unwinding only. Do not assign it to any groups. */
2505 if (tdep->has_pauth () && regnum == tdep->pauth_ra_state_regnum)
2508 return group == all_reggroup;
2511 /* Helper for aarch64_pseudo_read_value. */
2513 static struct value *
2514 aarch64_pseudo_read_value_1 (struct gdbarch *gdbarch,
2515 readable_regcache *regcache, int regnum_offset,
2516 int regsize, struct value *result_value)
2518 unsigned v_regnum = AARCH64_V0_REGNUM + regnum_offset;
2520 /* Enough space for a full vector register. */
2521 gdb_byte reg_buf[register_size (gdbarch, AARCH64_V0_REGNUM)];
2522 gdb_static_assert (AARCH64_V0_REGNUM == AARCH64_SVE_Z0_REGNUM);
2524 if (regcache->raw_read (v_regnum, reg_buf) != REG_VALID)
2525 mark_value_bytes_unavailable (result_value, 0,
2526 TYPE_LENGTH (value_type (result_value)));
2528 memcpy (value_contents_raw (result_value), reg_buf, regsize);
2530 return result_value;
2533 /* Implement the "pseudo_register_read_value" gdbarch method. */
2535 static struct value *
2536 aarch64_pseudo_read_value (struct gdbarch *gdbarch, readable_regcache *regcache,
2539 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2540 struct value *result_value = allocate_value (register_type (gdbarch, regnum));
2542 VALUE_LVAL (result_value) = lval_register;
2543 VALUE_REGNUM (result_value) = regnum;
2545 regnum -= gdbarch_num_regs (gdbarch);
2547 if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32)
2548 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2549 regnum - AARCH64_Q0_REGNUM,
2550 Q_REGISTER_SIZE, result_value);
2552 if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32)
2553 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2554 regnum - AARCH64_D0_REGNUM,
2555 D_REGISTER_SIZE, result_value);
2557 if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32)
2558 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2559 regnum - AARCH64_S0_REGNUM,
2560 S_REGISTER_SIZE, result_value);
2562 if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32)
2563 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2564 regnum - AARCH64_H0_REGNUM,
2565 H_REGISTER_SIZE, result_value);
2567 if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32)
2568 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2569 regnum - AARCH64_B0_REGNUM,
2570 B_REGISTER_SIZE, result_value);
2572 if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM
2573 && regnum < AARCH64_SVE_V0_REGNUM + 32)
2574 return aarch64_pseudo_read_value_1 (gdbarch, regcache,
2575 regnum - AARCH64_SVE_V0_REGNUM,
2576 V_REGISTER_SIZE, result_value);
2578 gdb_assert_not_reached ("regnum out of bound");
2581 /* Helper for aarch64_pseudo_write. */
2584 aarch64_pseudo_write_1 (struct gdbarch *gdbarch, struct regcache *regcache,
2585 int regnum_offset, int regsize, const gdb_byte *buf)
2587 unsigned v_regnum = AARCH64_V0_REGNUM + regnum_offset;
2589 /* Enough space for a full vector register. */
2590 gdb_byte reg_buf[register_size (gdbarch, AARCH64_V0_REGNUM)];
2591 gdb_static_assert (AARCH64_V0_REGNUM == AARCH64_SVE_Z0_REGNUM);
2593 /* Ensure the register buffer is zero, we want gdb writes of the
2594 various 'scalar' pseudo registers to behavior like architectural
2595 writes, register width bytes are written the remainder are set to
2597 memset (reg_buf, 0, register_size (gdbarch, AARCH64_V0_REGNUM));
2599 memcpy (reg_buf, buf, regsize);
2600 regcache->raw_write (v_regnum, reg_buf);
2603 /* Implement the "pseudo_register_write" gdbarch method. */
2606 aarch64_pseudo_write (struct gdbarch *gdbarch, struct regcache *regcache,
2607 int regnum, const gdb_byte *buf)
2609 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
2610 regnum -= gdbarch_num_regs (gdbarch);
2612 if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32)
2613 return aarch64_pseudo_write_1 (gdbarch, regcache,
2614 regnum - AARCH64_Q0_REGNUM, Q_REGISTER_SIZE,
2617 if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32)
2618 return aarch64_pseudo_write_1 (gdbarch, regcache,
2619 regnum - AARCH64_D0_REGNUM, D_REGISTER_SIZE,
2622 if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32)
2623 return aarch64_pseudo_write_1 (gdbarch, regcache,
2624 regnum - AARCH64_S0_REGNUM, S_REGISTER_SIZE,
2627 if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32)
2628 return aarch64_pseudo_write_1 (gdbarch, regcache,
2629 regnum - AARCH64_H0_REGNUM, H_REGISTER_SIZE,
2632 if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32)
2633 return aarch64_pseudo_write_1 (gdbarch, regcache,
2634 regnum - AARCH64_B0_REGNUM, B_REGISTER_SIZE,
2637 if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM
2638 && regnum < AARCH64_SVE_V0_REGNUM + 32)
2639 return aarch64_pseudo_write_1 (gdbarch, regcache,
2640 regnum - AARCH64_SVE_V0_REGNUM,
2641 V_REGISTER_SIZE, buf);
2643 gdb_assert_not_reached ("regnum out of bound");
2646 /* Callback function for user_reg_add. */
2648 static struct value *
2649 value_of_aarch64_user_reg (struct frame_info *frame, const void *baton)
2651 const int *reg_p = (const int *) baton;
2653 return value_of_register (*reg_p, frame);
2657 /* Implement the "software_single_step" gdbarch method, needed to
2658 single step through atomic sequences on AArch64. */
2660 static std::vector<CORE_ADDR>
2661 aarch64_software_single_step (struct regcache *regcache)
2663 struct gdbarch *gdbarch = regcache->arch ();
2664 enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
2665 const int insn_size = 4;
2666 const int atomic_sequence_length = 16; /* Instruction sequence length. */
2667 CORE_ADDR pc = regcache_read_pc (regcache);
2668 CORE_ADDR breaks[2] = { CORE_ADDR_MAX, CORE_ADDR_MAX };
2670 CORE_ADDR closing_insn = 0;
2671 uint32_t insn = read_memory_unsigned_integer (loc, insn_size,
2672 byte_order_for_code);
2675 int bc_insn_count = 0; /* Conditional branch instruction count. */
2676 int last_breakpoint = 0; /* Defaults to 0 (no breakpoints placed). */
2679 if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0)
2682 /* Look for a Load Exclusive instruction which begins the sequence. */
2683 if (inst.opcode->iclass != ldstexcl || bit (insn, 22) == 0)
2686 for (insn_count = 0; insn_count < atomic_sequence_length; ++insn_count)
2689 insn = read_memory_unsigned_integer (loc, insn_size,
2690 byte_order_for_code);
2692 if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0)
2694 /* Check if the instruction is a conditional branch. */
2695 if (inst.opcode->iclass == condbranch)
2697 gdb_assert (inst.operands[0].type == AARCH64_OPND_ADDR_PCREL19);
2699 if (bc_insn_count >= 1)
2702 /* It is, so we'll try to set a breakpoint at the destination. */
2703 breaks[1] = loc + inst.operands[0].imm.value;
2709 /* Look for the Store Exclusive which closes the atomic sequence. */
2710 if (inst.opcode->iclass == ldstexcl && bit (insn, 22) == 0)
2717 /* We didn't find a closing Store Exclusive instruction, fall back. */
2721 /* Insert breakpoint after the end of the atomic sequence. */
2722 breaks[0] = loc + insn_size;
2724 /* Check for duplicated breakpoints, and also check that the second
2725 breakpoint is not within the atomic sequence. */
2727 && (breaks[1] == breaks[0]
2728 || (breaks[1] >= pc && breaks[1] <= closing_insn)))
2729 last_breakpoint = 0;
2731 std::vector<CORE_ADDR> next_pcs;
2733 /* Insert the breakpoint at the end of the sequence, and one at the
2734 destination of the conditional branch, if it exists. */
2735 for (index = 0; index <= last_breakpoint; index++)
2736 next_pcs.push_back (breaks[index]);
2741 struct aarch64_displaced_step_closure : public displaced_step_closure
2743 /* It is true when condition instruction, such as B.CON, TBZ, etc,
2744 is being displaced stepping. */
2747 /* PC adjustment offset after displaced stepping. */
2748 int32_t pc_adjust = 0;
2751 /* Data when visiting instructions for displaced stepping. */
2753 struct aarch64_displaced_step_data
2755 struct aarch64_insn_data base;
2757 /* The address where the instruction will be executed at. */
2759 /* Buffer of instructions to be copied to NEW_ADDR to execute. */
2760 uint32_t insn_buf[AARCH64_DISPLACED_MODIFIED_INSNS];
2761 /* Number of instructions in INSN_BUF. */
2762 unsigned insn_count;
2763 /* Registers when doing displaced stepping. */
2764 struct regcache *regs;
2766 aarch64_displaced_step_closure *dsc;
2769 /* Implementation of aarch64_insn_visitor method "b". */
2772 aarch64_displaced_step_b (const int is_bl, const int32_t offset,
2773 struct aarch64_insn_data *data)
2775 struct aarch64_displaced_step_data *dsd
2776 = (struct aarch64_displaced_step_data *) data;
2777 int64_t new_offset = data->insn_addr - dsd->new_addr + offset;
2779 if (can_encode_int32 (new_offset, 28))
2781 /* Emit B rather than BL, because executing BL on a new address
2782 will get the wrong address into LR. In order to avoid this,
2783 we emit B, and update LR if the instruction is BL. */
2784 emit_b (dsd->insn_buf, 0, new_offset);
2790 emit_nop (dsd->insn_buf);
2792 dsd->dsc->pc_adjust = offset;
2798 regcache_cooked_write_unsigned (dsd->regs, AARCH64_LR_REGNUM,
2799 data->insn_addr + 4);
2803 /* Implementation of aarch64_insn_visitor method "b_cond". */
2806 aarch64_displaced_step_b_cond (const unsigned cond, const int32_t offset,
2807 struct aarch64_insn_data *data)
2809 struct aarch64_displaced_step_data *dsd
2810 = (struct aarch64_displaced_step_data *) data;
2812 /* GDB has to fix up PC after displaced step this instruction
2813 differently according to the condition is true or false. Instead
2814 of checking COND against conditional flags, we can use
2815 the following instructions, and GDB can tell how to fix up PC
2816 according to the PC value.
2818 B.COND TAKEN ; If cond is true, then jump to TAKEN.
2824 emit_bcond (dsd->insn_buf, cond, 8);
2826 dsd->dsc->pc_adjust = offset;
2827 dsd->insn_count = 1;
2830 /* Dynamically allocate a new register. If we know the register
2831 statically, we should make it a global as above instead of using this
2834 static struct aarch64_register
2835 aarch64_register (unsigned num, int is64)
2837 return (struct aarch64_register) { num, is64 };
2840 /* Implementation of aarch64_insn_visitor method "cb". */
2843 aarch64_displaced_step_cb (const int32_t offset, const int is_cbnz,
2844 const unsigned rn, int is64,
2845 struct aarch64_insn_data *data)
2847 struct aarch64_displaced_step_data *dsd
2848 = (struct aarch64_displaced_step_data *) data;
2850 /* The offset is out of range for a compare and branch
2851 instruction. We can use the following instructions instead:
2853 CBZ xn, TAKEN ; xn == 0, then jump to TAKEN.
2858 emit_cb (dsd->insn_buf, is_cbnz, aarch64_register (rn, is64), 8);
2859 dsd->insn_count = 1;
2861 dsd->dsc->pc_adjust = offset;
2864 /* Implementation of aarch64_insn_visitor method "tb". */
2867 aarch64_displaced_step_tb (const int32_t offset, int is_tbnz,
2868 const unsigned rt, unsigned bit,
2869 struct aarch64_insn_data *data)
2871 struct aarch64_displaced_step_data *dsd
2872 = (struct aarch64_displaced_step_data *) data;
2874 /* The offset is out of range for a test bit and branch
2875 instruction We can use the following instructions instead:
2877 TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN.
2883 emit_tb (dsd->insn_buf, is_tbnz, bit, aarch64_register (rt, 1), 8);
2884 dsd->insn_count = 1;
2886 dsd->dsc->pc_adjust = offset;
2889 /* Implementation of aarch64_insn_visitor method "adr". */
2892 aarch64_displaced_step_adr (const int32_t offset, const unsigned rd,
2893 const int is_adrp, struct aarch64_insn_data *data)
2895 struct aarch64_displaced_step_data *dsd
2896 = (struct aarch64_displaced_step_data *) data;
2897 /* We know exactly the address the ADR{P,} instruction will compute.
2898 We can just write it to the destination register. */
2899 CORE_ADDR address = data->insn_addr + offset;
2903 /* Clear the lower 12 bits of the offset to get the 4K page. */
2904 regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rd,
2908 regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rd,
2911 dsd->dsc->pc_adjust = 4;
2912 emit_nop (dsd->insn_buf);
2913 dsd->insn_count = 1;
2916 /* Implementation of aarch64_insn_visitor method "ldr_literal". */
2919 aarch64_displaced_step_ldr_literal (const int32_t offset, const int is_sw,
2920 const unsigned rt, const int is64,
2921 struct aarch64_insn_data *data)
2923 struct aarch64_displaced_step_data *dsd
2924 = (struct aarch64_displaced_step_data *) data;
2925 CORE_ADDR address = data->insn_addr + offset;
2926 struct aarch64_memory_operand zero = { MEMORY_OPERAND_OFFSET, 0 };
2928 regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rt,
2932 dsd->insn_count = emit_ldrsw (dsd->insn_buf, aarch64_register (rt, 1),
2933 aarch64_register (rt, 1), zero);
2935 dsd->insn_count = emit_ldr (dsd->insn_buf, aarch64_register (rt, is64),
2936 aarch64_register (rt, 1), zero);
2938 dsd->dsc->pc_adjust = 4;
2941 /* Implementation of aarch64_insn_visitor method "others". */
2944 aarch64_displaced_step_others (const uint32_t insn,
2945 struct aarch64_insn_data *data)
2947 struct aarch64_displaced_step_data *dsd
2948 = (struct aarch64_displaced_step_data *) data;
2950 aarch64_emit_insn (dsd->insn_buf, insn);
2951 dsd->insn_count = 1;
2953 if ((insn & 0xfffffc1f) == 0xd65f0000)
2956 dsd->dsc->pc_adjust = 0;
2959 dsd->dsc->pc_adjust = 4;
2962 static const struct aarch64_insn_visitor visitor =
2964 aarch64_displaced_step_b,
2965 aarch64_displaced_step_b_cond,
2966 aarch64_displaced_step_cb,
2967 aarch64_displaced_step_tb,
2968 aarch64_displaced_step_adr,
2969 aarch64_displaced_step_ldr_literal,
2970 aarch64_displaced_step_others,
2973 /* Implement the "displaced_step_copy_insn" gdbarch method. */
2975 struct displaced_step_closure *
2976 aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch,
2977 CORE_ADDR from, CORE_ADDR to,
2978 struct regcache *regs)
2980 enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch);
2981 uint32_t insn = read_memory_unsigned_integer (from, 4, byte_order_for_code);
2982 struct aarch64_displaced_step_data dsd;
2985 if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0)
2988 /* Look for a Load Exclusive instruction which begins the sequence. */
2989 if (inst.opcode->iclass == ldstexcl && bit (insn, 22))
2991 /* We can't displaced step atomic sequences. */
2995 std::unique_ptr<aarch64_displaced_step_closure> dsc
2996 (new aarch64_displaced_step_closure);
2997 dsd.base.insn_addr = from;
3000 dsd.dsc = dsc.get ();
3002 aarch64_relocate_instruction (insn, &visitor,
3003 (struct aarch64_insn_data *) &dsd);
3004 gdb_assert (dsd.insn_count <= AARCH64_DISPLACED_MODIFIED_INSNS);
3006 if (dsd.insn_count != 0)
3010 /* Instruction can be relocated to scratch pad. Copy
3011 relocated instruction(s) there. */
3012 for (i = 0; i < dsd.insn_count; i++)
3014 if (debug_displaced)
3016 debug_printf ("displaced: writing insn ");
3017 debug_printf ("%.8x", dsd.insn_buf[i]);
3018 debug_printf (" at %s\n", paddress (gdbarch, to + i * 4));
3020 write_memory_unsigned_integer (to + i * 4, 4, byte_order_for_code,
3021 (ULONGEST) dsd.insn_buf[i]);
3029 return dsc.release ();
3032 /* Implement the "displaced_step_fixup" gdbarch method. */
3035 aarch64_displaced_step_fixup (struct gdbarch *gdbarch,
3036 struct displaced_step_closure *dsc_,
3037 CORE_ADDR from, CORE_ADDR to,
3038 struct regcache *regs)
3040 aarch64_displaced_step_closure *dsc = (aarch64_displaced_step_closure *) dsc_;
3046 regcache_cooked_read_unsigned (regs, AARCH64_PC_REGNUM, &pc);
3049 /* Condition is true. */
3051 else if (pc - to == 4)
3053 /* Condition is false. */
3057 gdb_assert_not_reached ("Unexpected PC value after displaced stepping");
3060 if (dsc->pc_adjust != 0)
3062 if (debug_displaced)
3064 debug_printf ("displaced: fixup: set PC to %s:%d\n",
3065 paddress (gdbarch, from), dsc->pc_adjust);
3067 regcache_cooked_write_unsigned (regs, AARCH64_PC_REGNUM,
3068 from + dsc->pc_adjust);
3072 /* Implement the "displaced_step_hw_singlestep" gdbarch method. */
3075 aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch,
3076 struct displaced_step_closure *closure)
3081 /* Get the correct target description for the given VQ value.
3082 If VQ is zero then it is assumed SVE is not supported.
3083 (It is not possible to set VQ to zero on an SVE system). */
3086 aarch64_read_description (uint64_t vq, bool pauth_p)
3088 if (vq > AARCH64_MAX_SVE_VQ)
3089 error (_("VQ is %" PRIu64 ", maximum supported value is %d"), vq,
3090 AARCH64_MAX_SVE_VQ);
3092 struct target_desc *tdesc = tdesc_aarch64_list[vq][pauth_p];
3096 tdesc = aarch64_create_target_description (vq, pauth_p);
3097 tdesc_aarch64_list[vq][pauth_p] = tdesc;
3103 /* Return the VQ used when creating the target description TDESC. */
3106 aarch64_get_tdesc_vq (const struct target_desc *tdesc)
3108 const struct tdesc_feature *feature_sve;
3110 if (!tdesc_has_registers (tdesc))
3113 feature_sve = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.sve");
3115 if (feature_sve == nullptr)
3118 uint64_t vl = tdesc_register_bitsize (feature_sve,
3119 aarch64_sve_register_names[0]) / 8;
3120 return sve_vq_from_vl (vl);
3123 /* Add all the expected register sets into GDBARCH. */
3126 aarch64_add_reggroups (struct gdbarch *gdbarch)
3128 reggroup_add (gdbarch, general_reggroup);
3129 reggroup_add (gdbarch, float_reggroup);
3130 reggroup_add (gdbarch, system_reggroup);
3131 reggroup_add (gdbarch, vector_reggroup);
3132 reggroup_add (gdbarch, all_reggroup);
3133 reggroup_add (gdbarch, save_reggroup);
3134 reggroup_add (gdbarch, restore_reggroup);
3137 /* Implement the "cannot_store_register" gdbarch method. */
3140 aarch64_cannot_store_register (struct gdbarch *gdbarch, int regnum)
3142 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3144 if (!tdep->has_pauth ())
3147 /* Pointer authentication registers are read-only. */
3148 return (regnum == AARCH64_PAUTH_DMASK_REGNUM (tdep->pauth_reg_base)
3149 || regnum == AARCH64_PAUTH_CMASK_REGNUM (tdep->pauth_reg_base));
3152 /* Initialize the current architecture based on INFO. If possible,
3153 re-use an architecture from ARCHES, which is a list of
3154 architectures already created during this debugging session.
3156 Called e.g. at program startup, when reading a core file, and when
3157 reading a binary file. */
3159 static struct gdbarch *
3160 aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
3162 const struct tdesc_feature *feature_core, *feature_fpu, *feature_sve;
3163 const struct tdesc_feature *feature_pauth;
3164 bool valid_p = true;
3165 int i, num_regs = 0, num_pseudo_regs = 0;
3166 int first_pauth_regnum = -1, pauth_ra_state_offset = -1;
3168 /* Use the vector length passed via the target info. Here -1 is used for no
3169 SVE, and 0 is unset. If unset then use the vector length from the existing
3172 if (info.id == (int *) -1)
3174 else if (info.id != 0)
3175 vq = (uint64_t) info.id;
3177 vq = aarch64_get_tdesc_vq (info.target_desc);
3179 if (vq > AARCH64_MAX_SVE_VQ)
3180 internal_error (__FILE__, __LINE__, _("VQ out of bounds: %s (max %d)"),
3181 pulongest (vq), AARCH64_MAX_SVE_VQ);
3183 /* If there is already a candidate, use it. */
3184 for (gdbarch_list *best_arch = gdbarch_list_lookup_by_info (arches, &info);
3185 best_arch != nullptr;
3186 best_arch = gdbarch_list_lookup_by_info (best_arch->next, &info))
3188 struct gdbarch_tdep *tdep = gdbarch_tdep (best_arch->gdbarch);
3189 if (tdep && tdep->vq == vq)
3190 return best_arch->gdbarch;
3193 /* Ensure we always have a target descriptor, and that it is for the given VQ
3195 const struct target_desc *tdesc = info.target_desc;
3196 if (!tdesc_has_registers (tdesc) || vq != aarch64_get_tdesc_vq (tdesc))
3197 tdesc = aarch64_read_description (vq, false);
3200 feature_core = tdesc_find_feature (tdesc,"org.gnu.gdb.aarch64.core");
3201 feature_fpu = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.fpu");
3202 feature_sve = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.sve");
3203 feature_pauth = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.pauth");
3205 if (feature_core == nullptr)
3208 struct tdesc_arch_data *tdesc_data = tdesc_data_alloc ();
3210 /* Validate the description provides the mandatory core R registers
3211 and allocate their numbers. */
3212 for (i = 0; i < ARRAY_SIZE (aarch64_r_register_names); i++)
3213 valid_p &= tdesc_numbered_register (feature_core, tdesc_data,
3214 AARCH64_X0_REGNUM + i,
3215 aarch64_r_register_names[i]);
3217 num_regs = AARCH64_X0_REGNUM + i;
3219 /* Add the V registers. */
3220 if (feature_fpu != nullptr)
3222 if (feature_sve != nullptr)
3223 error (_("Program contains both fpu and SVE features."));
3225 /* Validate the description provides the mandatory V registers
3226 and allocate their numbers. */
3227 for (i = 0; i < ARRAY_SIZE (aarch64_v_register_names); i++)
3228 valid_p &= tdesc_numbered_register (feature_fpu, tdesc_data,
3229 AARCH64_V0_REGNUM + i,
3230 aarch64_v_register_names[i]);
3232 num_regs = AARCH64_V0_REGNUM + i;
3235 /* Add the SVE registers. */
3236 if (feature_sve != nullptr)
3238 /* Validate the description provides the mandatory SVE registers
3239 and allocate their numbers. */
3240 for (i = 0; i < ARRAY_SIZE (aarch64_sve_register_names); i++)
3241 valid_p &= tdesc_numbered_register (feature_sve, tdesc_data,
3242 AARCH64_SVE_Z0_REGNUM + i,
3243 aarch64_sve_register_names[i]);
3245 num_regs = AARCH64_SVE_Z0_REGNUM + i;
3246 num_pseudo_regs += 32; /* add the Vn register pseudos. */
3249 if (feature_fpu != nullptr || feature_sve != nullptr)
3251 num_pseudo_regs += 32; /* add the Qn scalar register pseudos */
3252 num_pseudo_regs += 32; /* add the Dn scalar register pseudos */
3253 num_pseudo_regs += 32; /* add the Sn scalar register pseudos */
3254 num_pseudo_regs += 32; /* add the Hn scalar register pseudos */
3255 num_pseudo_regs += 32; /* add the Bn scalar register pseudos */
3258 /* Add the pauth registers. */
3259 if (feature_pauth != NULL)
3261 first_pauth_regnum = num_regs;
3262 pauth_ra_state_offset = num_pseudo_regs;
3263 /* Validate the descriptor provides the mandatory PAUTH registers and
3264 allocate their numbers. */
3265 for (i = 0; i < ARRAY_SIZE (aarch64_pauth_register_names); i++)
3266 valid_p &= tdesc_numbered_register (feature_pauth, tdesc_data,
3267 first_pauth_regnum + i,
3268 aarch64_pauth_register_names[i]);
3271 num_pseudo_regs += 1; /* Count RA_STATE pseudo register. */
3276 tdesc_data_cleanup (tdesc_data);
3280 /* AArch64 code is always little-endian. */
3281 info.byte_order_for_code = BFD_ENDIAN_LITTLE;
3283 struct gdbarch_tdep *tdep = XCNEW (struct gdbarch_tdep);
3284 struct gdbarch *gdbarch = gdbarch_alloc (&info, tdep);
3286 /* This should be low enough for everything. */
3287 tdep->lowest_pc = 0x20;
3288 tdep->jb_pc = -1; /* Longjump support not enabled by default. */
3289 tdep->jb_elt_size = 8;
3291 tdep->pauth_reg_base = first_pauth_regnum;
3292 tdep->pauth_ra_state_regnum = (feature_pauth == NULL) ? -1
3293 : pauth_ra_state_offset + num_regs;
3295 set_gdbarch_push_dummy_call (gdbarch, aarch64_push_dummy_call);
3296 set_gdbarch_frame_align (gdbarch, aarch64_frame_align);
3298 /* Advance PC across function entry code. */
3299 set_gdbarch_skip_prologue (gdbarch, aarch64_skip_prologue);
3301 /* The stack grows downward. */
3302 set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
3304 /* Breakpoint manipulation. */
3305 set_gdbarch_breakpoint_kind_from_pc (gdbarch,
3306 aarch64_breakpoint::kind_from_pc);
3307 set_gdbarch_sw_breakpoint_from_kind (gdbarch,
3308 aarch64_breakpoint::bp_from_kind);
3309 set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1);
3310 set_gdbarch_software_single_step (gdbarch, aarch64_software_single_step);
3312 /* Information about registers, etc. */
3313 set_gdbarch_sp_regnum (gdbarch, AARCH64_SP_REGNUM);
3314 set_gdbarch_pc_regnum (gdbarch, AARCH64_PC_REGNUM);
3315 set_gdbarch_num_regs (gdbarch, num_regs);
3317 set_gdbarch_num_pseudo_regs (gdbarch, num_pseudo_regs);
3318 set_gdbarch_pseudo_register_read_value (gdbarch, aarch64_pseudo_read_value);
3319 set_gdbarch_pseudo_register_write (gdbarch, aarch64_pseudo_write);
3320 set_tdesc_pseudo_register_name (gdbarch, aarch64_pseudo_register_name);
3321 set_tdesc_pseudo_register_type (gdbarch, aarch64_pseudo_register_type);
3322 set_tdesc_pseudo_register_reggroup_p (gdbarch,
3323 aarch64_pseudo_register_reggroup_p);
3324 set_gdbarch_cannot_store_register (gdbarch, aarch64_cannot_store_register);
3327 set_gdbarch_short_bit (gdbarch, 16);
3328 set_gdbarch_int_bit (gdbarch, 32);
3329 set_gdbarch_float_bit (gdbarch, 32);
3330 set_gdbarch_double_bit (gdbarch, 64);
3331 set_gdbarch_long_double_bit (gdbarch, 128);
3332 set_gdbarch_long_bit (gdbarch, 64);
3333 set_gdbarch_long_long_bit (gdbarch, 64);
3334 set_gdbarch_ptr_bit (gdbarch, 64);
3335 set_gdbarch_char_signed (gdbarch, 0);
3336 set_gdbarch_wchar_signed (gdbarch, 0);
3337 set_gdbarch_float_format (gdbarch, floatformats_ieee_single);
3338 set_gdbarch_double_format (gdbarch, floatformats_ieee_double);
3339 set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad);
3340 set_gdbarch_type_align (gdbarch, aarch64_type_align);
3342 /* Internal <-> external register number maps. */
3343 set_gdbarch_dwarf2_reg_to_regnum (gdbarch, aarch64_dwarf_reg_to_regnum);
3345 /* Returning results. */
3346 set_gdbarch_return_value (gdbarch, aarch64_return_value);
3349 set_gdbarch_print_insn (gdbarch, aarch64_gdb_print_insn);
3351 /* Virtual tables. */
3352 set_gdbarch_vbit_in_delta (gdbarch, 1);
3354 /* Register architecture. */
3355 aarch64_add_reggroups (gdbarch);
3357 /* Hook in the ABI-specific overrides, if they have been registered. */
3358 info.target_desc = tdesc;
3359 info.tdesc_data = tdesc_data;
3360 gdbarch_init_osabi (info, gdbarch);
3362 dwarf2_frame_set_init_reg (gdbarch, aarch64_dwarf2_frame_init_reg);
3363 /* Register DWARF CFA vendor handler. */
3364 set_gdbarch_execute_dwarf_cfa_vendor_op (gdbarch,
3365 aarch64_execute_dwarf_cfa_vendor_op);
3367 /* Add some default predicates. */
3368 frame_unwind_append_unwinder (gdbarch, &aarch64_stub_unwind);
3369 dwarf2_append_unwinders (gdbarch);
3370 frame_unwind_append_unwinder (gdbarch, &aarch64_prologue_unwind);
3372 frame_base_set_default (gdbarch, &aarch64_normal_base);
3374 /* Now we have tuned the configuration, set a few final things,
3375 based on what the OS ABI has told us. */
3377 if (tdep->jb_pc >= 0)
3378 set_gdbarch_get_longjmp_target (gdbarch, aarch64_get_longjmp_target);
3380 set_gdbarch_gen_return_address (gdbarch, aarch64_gen_return_address);
3382 tdesc_use_registers (gdbarch, tdesc, tdesc_data);
3384 /* Add standard register aliases. */
3385 for (i = 0; i < ARRAY_SIZE (aarch64_register_aliases); i++)
3386 user_reg_add (gdbarch, aarch64_register_aliases[i].name,
3387 value_of_aarch64_user_reg,
3388 &aarch64_register_aliases[i].regnum);
3390 register_aarch64_ravenscar_ops (gdbarch);
3396 aarch64_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file)
3398 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
3403 fprintf_unfiltered (file, _("aarch64_dump_tdep: Lowest pc = 0x%s"),
3404 paddress (gdbarch, tdep->lowest_pc));
3410 static void aarch64_process_record_test (void);
3415 _initialize_aarch64_tdep (void)
3417 gdbarch_register (bfd_arch_aarch64, aarch64_gdbarch_init,
3420 /* Debug this file's internals. */
3421 add_setshow_boolean_cmd ("aarch64", class_maintenance, &aarch64_debug, _("\
3422 Set AArch64 debugging."), _("\
3423 Show AArch64 debugging."), _("\
3424 When on, AArch64 specific debugging is enabled."),
3427 &setdebuglist, &showdebuglist);
3430 selftests::register_test ("aarch64-analyze-prologue",
3431 selftests::aarch64_analyze_prologue_test);
3432 selftests::register_test ("aarch64-process-record",
3433 selftests::aarch64_process_record_test);
3437 /* AArch64 process record-replay related structures, defines etc. */
3439 #define REG_ALLOC(REGS, LENGTH, RECORD_BUF) \
3442 unsigned int reg_len = LENGTH; \
3445 REGS = XNEWVEC (uint32_t, reg_len); \
3446 memcpy(®S[0], &RECORD_BUF[0], sizeof(uint32_t)*LENGTH); \
3451 #define MEM_ALLOC(MEMS, LENGTH, RECORD_BUF) \
3454 unsigned int mem_len = LENGTH; \
3457 MEMS = XNEWVEC (struct aarch64_mem_r, mem_len); \
3458 memcpy(&MEMS->len, &RECORD_BUF[0], \
3459 sizeof(struct aarch64_mem_r) * LENGTH); \
3464 /* AArch64 record/replay structures and enumerations. */
3466 struct aarch64_mem_r
3468 uint64_t len; /* Record length. */
3469 uint64_t addr; /* Memory address. */
3472 enum aarch64_record_result
3474 AARCH64_RECORD_SUCCESS,
3475 AARCH64_RECORD_UNSUPPORTED,
3476 AARCH64_RECORD_UNKNOWN
3479 typedef struct insn_decode_record_t
3481 struct gdbarch *gdbarch;
3482 struct regcache *regcache;
3483 CORE_ADDR this_addr; /* Address of insn to be recorded. */
3484 uint32_t aarch64_insn; /* Insn to be recorded. */
3485 uint32_t mem_rec_count; /* Count of memory records. */
3486 uint32_t reg_rec_count; /* Count of register records. */
3487 uint32_t *aarch64_regs; /* Registers to be recorded. */
3488 struct aarch64_mem_r *aarch64_mems; /* Memory locations to be recorded. */
3489 } insn_decode_record;
3491 /* Record handler for data processing - register instructions. */
3494 aarch64_record_data_proc_reg (insn_decode_record *aarch64_insn_r)
3496 uint8_t reg_rd, insn_bits24_27, insn_bits21_23;
3497 uint32_t record_buf[4];
3499 reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
3500 insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
3501 insn_bits21_23 = bits (aarch64_insn_r->aarch64_insn, 21, 23);
3503 if (!bit (aarch64_insn_r->aarch64_insn, 28))
3507 /* Logical (shifted register). */
3508 if (insn_bits24_27 == 0x0a)
3509 setflags = (bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03);
3511 else if (insn_bits24_27 == 0x0b)
3512 setflags = bit (aarch64_insn_r->aarch64_insn, 29);
3514 return AARCH64_RECORD_UNKNOWN;
3516 record_buf[0] = reg_rd;
3517 aarch64_insn_r->reg_rec_count = 1;
3519 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
3523 if (insn_bits24_27 == 0x0b)
3525 /* Data-processing (3 source). */
3526 record_buf[0] = reg_rd;
3527 aarch64_insn_r->reg_rec_count = 1;
3529 else if (insn_bits24_27 == 0x0a)
3531 if (insn_bits21_23 == 0x00)
3533 /* Add/subtract (with carry). */
3534 record_buf[0] = reg_rd;
3535 aarch64_insn_r->reg_rec_count = 1;
3536 if (bit (aarch64_insn_r->aarch64_insn, 29))
3538 record_buf[1] = AARCH64_CPSR_REGNUM;
3539 aarch64_insn_r->reg_rec_count = 2;
3542 else if (insn_bits21_23 == 0x02)
3544 /* Conditional compare (register) and conditional compare
3545 (immediate) instructions. */
3546 record_buf[0] = AARCH64_CPSR_REGNUM;
3547 aarch64_insn_r->reg_rec_count = 1;
3549 else if (insn_bits21_23 == 0x04 || insn_bits21_23 == 0x06)
3551 /* CConditional select. */
3552 /* Data-processing (2 source). */
3553 /* Data-processing (1 source). */
3554 record_buf[0] = reg_rd;
3555 aarch64_insn_r->reg_rec_count = 1;
3558 return AARCH64_RECORD_UNKNOWN;
3562 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
3564 return AARCH64_RECORD_SUCCESS;
3567 /* Record handler for data processing - immediate instructions. */
3570 aarch64_record_data_proc_imm (insn_decode_record *aarch64_insn_r)
3572 uint8_t reg_rd, insn_bit23, insn_bits24_27, setflags;
3573 uint32_t record_buf[4];
3575 reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
3576 insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23);
3577 insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
3579 if (insn_bits24_27 == 0x00 /* PC rel addressing. */
3580 || insn_bits24_27 == 0x03 /* Bitfield and Extract. */
3581 || (insn_bits24_27 == 0x02 && insn_bit23)) /* Move wide (immediate). */
3583 record_buf[0] = reg_rd;
3584 aarch64_insn_r->reg_rec_count = 1;
3586 else if (insn_bits24_27 == 0x01)
3588 /* Add/Subtract (immediate). */
3589 setflags = bit (aarch64_insn_r->aarch64_insn, 29);
3590 record_buf[0] = reg_rd;
3591 aarch64_insn_r->reg_rec_count = 1;
3593 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
3595 else if (insn_bits24_27 == 0x02 && !insn_bit23)
3597 /* Logical (immediate). */
3598 setflags = bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03;
3599 record_buf[0] = reg_rd;
3600 aarch64_insn_r->reg_rec_count = 1;
3602 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM;
3605 return AARCH64_RECORD_UNKNOWN;
3607 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
3609 return AARCH64_RECORD_SUCCESS;
3612 /* Record handler for branch, exception generation and system instructions. */
3615 aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r)
3617 struct gdbarch_tdep *tdep = gdbarch_tdep (aarch64_insn_r->gdbarch);
3618 uint8_t insn_bits24_27, insn_bits28_31, insn_bits22_23;
3619 uint32_t record_buf[4];
3621 insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
3622 insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31);
3623 insn_bits22_23 = bits (aarch64_insn_r->aarch64_insn, 22, 23);
3625 if (insn_bits28_31 == 0x0d)
3627 /* Exception generation instructions. */
3628 if (insn_bits24_27 == 0x04)
3630 if (!bits (aarch64_insn_r->aarch64_insn, 2, 4)
3631 && !bits (aarch64_insn_r->aarch64_insn, 21, 23)
3632 && bits (aarch64_insn_r->aarch64_insn, 0, 1) == 0x01)
3634 ULONGEST svc_number;
3636 regcache_raw_read_unsigned (aarch64_insn_r->regcache, 8,
3638 return tdep->aarch64_syscall_record (aarch64_insn_r->regcache,
3642 return AARCH64_RECORD_UNSUPPORTED;
3644 /* System instructions. */
3645 else if (insn_bits24_27 == 0x05 && insn_bits22_23 == 0x00)
3647 uint32_t reg_rt, reg_crn;
3649 reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
3650 reg_crn = bits (aarch64_insn_r->aarch64_insn, 12, 15);
3652 /* Record rt in case of sysl and mrs instructions. */
3653 if (bit (aarch64_insn_r->aarch64_insn, 21))
3655 record_buf[0] = reg_rt;
3656 aarch64_insn_r->reg_rec_count = 1;
3658 /* Record cpsr for hint and msr(immediate) instructions. */
3659 else if (reg_crn == 0x02 || reg_crn == 0x04)
3661 record_buf[0] = AARCH64_CPSR_REGNUM;
3662 aarch64_insn_r->reg_rec_count = 1;
3665 /* Unconditional branch (register). */
3666 else if((insn_bits24_27 & 0x0e) == 0x06)
3668 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
3669 if (bits (aarch64_insn_r->aarch64_insn, 21, 22) == 0x01)
3670 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM;
3673 return AARCH64_RECORD_UNKNOWN;
3675 /* Unconditional branch (immediate). */
3676 else if ((insn_bits28_31 & 0x07) == 0x01 && (insn_bits24_27 & 0x0c) == 0x04)
3678 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
3679 if (bit (aarch64_insn_r->aarch64_insn, 31))
3680 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM;
3683 /* Compare & branch (immediate), Test & branch (immediate) and
3684 Conditional branch (immediate). */
3685 record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM;
3687 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
3689 return AARCH64_RECORD_SUCCESS;
3692 /* Record handler for advanced SIMD load and store instructions. */
3695 aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r)
3698 uint64_t addr_offset = 0;
3699 uint32_t record_buf[24];
3700 uint64_t record_buf_mem[24];
3701 uint32_t reg_rn, reg_rt;
3702 uint32_t reg_index = 0, mem_index = 0;
3703 uint8_t opcode_bits, size_bits;
3705 reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
3706 reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9);
3707 size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11);
3708 opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15);
3709 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address);
3712 debug_printf ("Process record: Advanced SIMD load/store\n");
3714 /* Load/store single structure. */
3715 if (bit (aarch64_insn_r->aarch64_insn, 24))
3717 uint8_t sindex, scale, selem, esize, replicate = 0;
3718 scale = opcode_bits >> 2;
3719 selem = ((opcode_bits & 0x02) |
3720 bit (aarch64_insn_r->aarch64_insn, 21)) + 1;
3724 if (size_bits & 0x01)
3725 return AARCH64_RECORD_UNKNOWN;
3728 if ((size_bits >> 1) & 0x01)
3729 return AARCH64_RECORD_UNKNOWN;
3730 if (size_bits & 0x01)
3732 if (!((opcode_bits >> 1) & 0x01))
3735 return AARCH64_RECORD_UNKNOWN;
3739 if (bit (aarch64_insn_r->aarch64_insn, 22) && !(opcode_bits & 0x01))
3746 return AARCH64_RECORD_UNKNOWN;
3752 for (sindex = 0; sindex < selem; sindex++)
3754 record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
3755 reg_rt = (reg_rt + 1) % 32;
3759 for (sindex = 0; sindex < selem; sindex++)
3761 if (bit (aarch64_insn_r->aarch64_insn, 22))
3762 record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM;
3765 record_buf_mem[mem_index++] = esize / 8;
3766 record_buf_mem[mem_index++] = address + addr_offset;
3768 addr_offset = addr_offset + (esize / 8);
3769 reg_rt = (reg_rt + 1) % 32;
3773 /* Load/store multiple structure. */
3776 uint8_t selem, esize, rpt, elements;
3777 uint8_t eindex, rindex;
3779 esize = 8 << size_bits;
3780 if (bit (aarch64_insn_r->aarch64_insn, 30))
3781 elements = 128 / esize;
3783 elements = 64 / esize;
3785 switch (opcode_bits)
3787 /*LD/ST4 (4 Registers). */
3792 /*LD/ST1 (4 Registers). */
3797 /*LD/ST3 (3 Registers). */
3802 /*LD/ST1 (3 Registers). */
3807 /*LD/ST1 (1 Register). */
3812 /*LD/ST2 (2 Registers). */
3817 /*LD/ST1 (2 Registers). */
3823 return AARCH64_RECORD_UNSUPPORTED;
3826 for (rindex = 0; rindex < rpt; rindex++)
3827 for (eindex = 0; eindex < elements; eindex++)
3829 uint8_t reg_tt, sindex;
3830 reg_tt = (reg_rt + rindex) % 32;
3831 for (sindex = 0; sindex < selem; sindex++)
3833 if (bit (aarch64_insn_r->aarch64_insn, 22))
3834 record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM;
3837 record_buf_mem[mem_index++] = esize / 8;
3838 record_buf_mem[mem_index++] = address + addr_offset;
3840 addr_offset = addr_offset + (esize / 8);
3841 reg_tt = (reg_tt + 1) % 32;
3846 if (bit (aarch64_insn_r->aarch64_insn, 23))
3847 record_buf[reg_index++] = reg_rn;
3849 aarch64_insn_r->reg_rec_count = reg_index;
3850 aarch64_insn_r->mem_rec_count = mem_index / 2;
3851 MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count,
3853 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
3855 return AARCH64_RECORD_SUCCESS;
3858 /* Record handler for load and store instructions. */
3861 aarch64_record_load_store (insn_decode_record *aarch64_insn_r)
3863 uint8_t insn_bits24_27, insn_bits28_29, insn_bits10_11;
3864 uint8_t insn_bit23, insn_bit21;
3865 uint8_t opc, size_bits, ld_flag, vector_flag;
3866 uint32_t reg_rn, reg_rt, reg_rt2;
3867 uint64_t datasize, offset;
3868 uint32_t record_buf[8];
3869 uint64_t record_buf_mem[8];
3872 insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11);
3873 insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
3874 insn_bits28_29 = bits (aarch64_insn_r->aarch64_insn, 28, 29);
3875 insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21);
3876 insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23);
3877 ld_flag = bit (aarch64_insn_r->aarch64_insn, 22);
3878 vector_flag = bit (aarch64_insn_r->aarch64_insn, 26);
3879 reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4);
3880 reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9);
3881 reg_rt2 = bits (aarch64_insn_r->aarch64_insn, 10, 14);
3882 size_bits = bits (aarch64_insn_r->aarch64_insn, 30, 31);
3884 /* Load/store exclusive. */
3885 if (insn_bits24_27 == 0x08 && insn_bits28_29 == 0x00)
3888 debug_printf ("Process record: load/store exclusive\n");
3892 record_buf[0] = reg_rt;
3893 aarch64_insn_r->reg_rec_count = 1;
3896 record_buf[1] = reg_rt2;
3897 aarch64_insn_r->reg_rec_count = 2;
3903 datasize = (8 << size_bits) * 2;
3905 datasize = (8 << size_bits);
3906 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
3908 record_buf_mem[0] = datasize / 8;
3909 record_buf_mem[1] = address;
3910 aarch64_insn_r->mem_rec_count = 1;
3913 /* Save register rs. */
3914 record_buf[0] = bits (aarch64_insn_r->aarch64_insn, 16, 20);
3915 aarch64_insn_r->reg_rec_count = 1;
3919 /* Load register (literal) instructions decoding. */
3920 else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x01)
3923 debug_printf ("Process record: load register (literal)\n");
3925 record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
3927 record_buf[0] = reg_rt;
3928 aarch64_insn_r->reg_rec_count = 1;
3930 /* All types of load/store pair instructions decoding. */
3931 else if ((insn_bits24_27 & 0x0a) == 0x08 && insn_bits28_29 == 0x02)
3934 debug_printf ("Process record: load/store pair\n");
3940 record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
3941 record_buf[1] = reg_rt2 + AARCH64_V0_REGNUM;
3945 record_buf[0] = reg_rt;
3946 record_buf[1] = reg_rt2;
3948 aarch64_insn_r->reg_rec_count = 2;
3953 imm7_off = bits (aarch64_insn_r->aarch64_insn, 15, 21);
3955 size_bits = size_bits >> 1;
3956 datasize = 8 << (2 + size_bits);
3957 offset = (imm7_off & 0x40) ? (~imm7_off & 0x007f) + 1 : imm7_off;
3958 offset = offset << (2 + size_bits);
3959 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
3961 if (!((insn_bits24_27 & 0x0b) == 0x08 && insn_bit23))
3963 if (imm7_off & 0x40)
3964 address = address - offset;
3966 address = address + offset;
3969 record_buf_mem[0] = datasize / 8;
3970 record_buf_mem[1] = address;
3971 record_buf_mem[2] = datasize / 8;
3972 record_buf_mem[3] = address + (datasize / 8);
3973 aarch64_insn_r->mem_rec_count = 2;
3975 if (bit (aarch64_insn_r->aarch64_insn, 23))
3976 record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn;
3978 /* Load/store register (unsigned immediate) instructions. */
3979 else if ((insn_bits24_27 & 0x0b) == 0x09 && insn_bits28_29 == 0x03)
3981 opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
3991 if (size_bits == 0x3 && vector_flag == 0x0 && opc == 0x2)
3993 /* PRFM (immediate) */
3994 return AARCH64_RECORD_SUCCESS;
3996 else if (size_bits == 0x2 && vector_flag == 0x0 && opc == 0x2)
3998 /* LDRSW (immediate) */
4012 debug_printf ("Process record: load/store (unsigned immediate):"
4013 " size %x V %d opc %x\n", size_bits, vector_flag,
4019 offset = bits (aarch64_insn_r->aarch64_insn, 10, 21);
4020 datasize = 8 << size_bits;
4021 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
4023 offset = offset << size_bits;
4024 address = address + offset;
4026 record_buf_mem[0] = datasize >> 3;
4027 record_buf_mem[1] = address;
4028 aarch64_insn_r->mem_rec_count = 1;
4033 record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
4035 record_buf[0] = reg_rt;
4036 aarch64_insn_r->reg_rec_count = 1;
4039 /* Load/store register (register offset) instructions. */
4040 else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03
4041 && insn_bits10_11 == 0x02 && insn_bit21)
4044 debug_printf ("Process record: load/store (register offset)\n");
4045 opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
4052 if (size_bits != 0x03)
4055 return AARCH64_RECORD_UNKNOWN;
4059 ULONGEST reg_rm_val;
4061 regcache_raw_read_unsigned (aarch64_insn_r->regcache,
4062 bits (aarch64_insn_r->aarch64_insn, 16, 20), ®_rm_val);
4063 if (bit (aarch64_insn_r->aarch64_insn, 12))
4064 offset = reg_rm_val << size_bits;
4066 offset = reg_rm_val;
4067 datasize = 8 << size_bits;
4068 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
4070 address = address + offset;
4071 record_buf_mem[0] = datasize >> 3;
4072 record_buf_mem[1] = address;
4073 aarch64_insn_r->mem_rec_count = 1;
4078 record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
4080 record_buf[0] = reg_rt;
4081 aarch64_insn_r->reg_rec_count = 1;
4084 /* Load/store register (immediate and unprivileged) instructions. */
4085 else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03
4090 debug_printf ("Process record: load/store "
4091 "(immediate and unprivileged)\n");
4093 opc = bits (aarch64_insn_r->aarch64_insn, 22, 23);
4100 if (size_bits != 0x03)
4103 return AARCH64_RECORD_UNKNOWN;
4108 imm9_off = bits (aarch64_insn_r->aarch64_insn, 12, 20);
4109 offset = (imm9_off & 0x0100) ? (((~imm9_off) & 0x01ff) + 1) : imm9_off;
4110 datasize = 8 << size_bits;
4111 regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn,
4113 if (insn_bits10_11 != 0x01)
4115 if (imm9_off & 0x0100)
4116 address = address - offset;
4118 address = address + offset;
4120 record_buf_mem[0] = datasize >> 3;
4121 record_buf_mem[1] = address;
4122 aarch64_insn_r->mem_rec_count = 1;
4127 record_buf[0] = reg_rt + AARCH64_V0_REGNUM;
4129 record_buf[0] = reg_rt;
4130 aarch64_insn_r->reg_rec_count = 1;
4132 if (insn_bits10_11 == 0x01 || insn_bits10_11 == 0x03)
4133 record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn;
4135 /* Advanced SIMD load/store instructions. */
4137 return aarch64_record_asimd_load_store (aarch64_insn_r);
4139 MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count,
4141 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
4143 return AARCH64_RECORD_SUCCESS;
4146 /* Record handler for data processing SIMD and floating point instructions. */
4149 aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r)
4151 uint8_t insn_bit21, opcode, rmode, reg_rd;
4152 uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15;
4153 uint8_t insn_bits11_14;
4154 uint32_t record_buf[2];
4156 insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27);
4157 insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31);
4158 insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11);
4159 insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15);
4160 insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14);
4161 opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18);
4162 rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20);
4163 reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4);
4164 insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21);
4167 debug_printf ("Process record: data processing SIMD/FP: ");
4169 if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e)
4171 /* Floating point - fixed point conversion instructions. */
4175 debug_printf ("FP - fixed point conversion");
4177 if ((opcode >> 1) == 0x0 && rmode == 0x03)
4178 record_buf[0] = reg_rd;
4180 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4182 /* Floating point - conditional compare instructions. */
4183 else if (insn_bits10_11 == 0x01)
4186 debug_printf ("FP - conditional compare");
4188 record_buf[0] = AARCH64_CPSR_REGNUM;
4190 /* Floating point - data processing (2-source) and
4191 conditional select instructions. */
4192 else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03)
4195 debug_printf ("FP - DP (2-source)");
4197 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4199 else if (insn_bits10_11 == 0x00)
4201 /* Floating point - immediate instructions. */
4202 if ((insn_bits12_15 & 0x01) == 0x01
4203 || (insn_bits12_15 & 0x07) == 0x04)
4206 debug_printf ("FP - immediate");
4207 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4209 /* Floating point - compare instructions. */
4210 else if ((insn_bits12_15 & 0x03) == 0x02)
4213 debug_printf ("FP - immediate");
4214 record_buf[0] = AARCH64_CPSR_REGNUM;
4216 /* Floating point - integer conversions instructions. */
4217 else if (insn_bits12_15 == 0x00)
4219 /* Convert float to integer instruction. */
4220 if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode))
4223 debug_printf ("float to int conversion");
4225 record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
4227 /* Convert integer to float instruction. */
4228 else if ((opcode >> 1) == 0x01 && !rmode)
4231 debug_printf ("int to float conversion");
4233 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4235 /* Move float to integer instruction. */
4236 else if ((opcode >> 1) == 0x03)
4239 debug_printf ("move float to int");
4241 if (!(opcode & 0x01))
4242 record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
4244 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4247 return AARCH64_RECORD_UNKNOWN;
4250 return AARCH64_RECORD_UNKNOWN;
4253 return AARCH64_RECORD_UNKNOWN;
4255 else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0e)
4258 debug_printf ("SIMD copy");
4260 /* Advanced SIMD copy instructions. */
4261 if (!bits (aarch64_insn_r->aarch64_insn, 21, 23)
4262 && !bit (aarch64_insn_r->aarch64_insn, 15)
4263 && bit (aarch64_insn_r->aarch64_insn, 10))
4265 if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07)
4266 record_buf[0] = reg_rd + AARCH64_X0_REGNUM;
4268 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4271 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4273 /* All remaining floating point or advanced SIMD instructions. */
4277 debug_printf ("all remain");
4279 record_buf[0] = reg_rd + AARCH64_V0_REGNUM;
4283 debug_printf ("\n");
4285 aarch64_insn_r->reg_rec_count++;
4286 gdb_assert (aarch64_insn_r->reg_rec_count == 1);
4287 REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count,
4289 return AARCH64_RECORD_SUCCESS;
4292 /* Decodes insns type and invokes its record handler. */
4295 aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r)
4297 uint32_t ins_bit25, ins_bit26, ins_bit27, ins_bit28;
4299 ins_bit25 = bit (aarch64_insn_r->aarch64_insn, 25);
4300 ins_bit26 = bit (aarch64_insn_r->aarch64_insn, 26);
4301 ins_bit27 = bit (aarch64_insn_r->aarch64_insn, 27);
4302 ins_bit28 = bit (aarch64_insn_r->aarch64_insn, 28);
4304 /* Data processing - immediate instructions. */
4305 if (!ins_bit26 && !ins_bit27 && ins_bit28)
4306 return aarch64_record_data_proc_imm (aarch64_insn_r);
4308 /* Branch, exception generation and system instructions. */
4309 if (ins_bit26 && !ins_bit27 && ins_bit28)
4310 return aarch64_record_branch_except_sys (aarch64_insn_r);
4312 /* Load and store instructions. */
4313 if (!ins_bit25 && ins_bit27)
4314 return aarch64_record_load_store (aarch64_insn_r);
4316 /* Data processing - register instructions. */
4317 if (ins_bit25 && !ins_bit26 && ins_bit27)
4318 return aarch64_record_data_proc_reg (aarch64_insn_r);
4320 /* Data processing - SIMD and floating point instructions. */
4321 if (ins_bit25 && ins_bit26 && ins_bit27)
4322 return aarch64_record_data_proc_simd_fp (aarch64_insn_r);
4324 return AARCH64_RECORD_UNSUPPORTED;
4327 /* Cleans up local record registers and memory allocations. */
4330 deallocate_reg_mem (insn_decode_record *record)
4332 xfree (record->aarch64_regs);
4333 xfree (record->aarch64_mems);
4337 namespace selftests {
4340 aarch64_process_record_test (void)
4342 struct gdbarch_info info;
4345 gdbarch_info_init (&info);
4346 info.bfd_arch_info = bfd_scan_arch ("aarch64");
4348 struct gdbarch *gdbarch = gdbarch_find_by_info (info);
4349 SELF_CHECK (gdbarch != NULL);
4351 insn_decode_record aarch64_record;
4353 memset (&aarch64_record, 0, sizeof (insn_decode_record));
4354 aarch64_record.regcache = NULL;
4355 aarch64_record.this_addr = 0;
4356 aarch64_record.gdbarch = gdbarch;
4358 /* 20 00 80 f9 prfm pldl1keep, [x1] */
4359 aarch64_record.aarch64_insn = 0xf9800020;
4360 ret = aarch64_record_decode_insn_handler (&aarch64_record);
4361 SELF_CHECK (ret == AARCH64_RECORD_SUCCESS);
4362 SELF_CHECK (aarch64_record.reg_rec_count == 0);
4363 SELF_CHECK (aarch64_record.mem_rec_count == 0);
4365 deallocate_reg_mem (&aarch64_record);
4368 } // namespace selftests
4369 #endif /* GDB_SELF_TEST */
4371 /* Parse the current instruction and record the values of the registers and
4372 memory that will be changed in current instruction to record_arch_list
4373 return -1 if something is wrong. */
4376 aarch64_process_record (struct gdbarch *gdbarch, struct regcache *regcache,
4377 CORE_ADDR insn_addr)
4379 uint32_t rec_no = 0;
4380 uint8_t insn_size = 4;
4382 gdb_byte buf[insn_size];
4383 insn_decode_record aarch64_record;
4385 memset (&buf[0], 0, insn_size);
4386 memset (&aarch64_record, 0, sizeof (insn_decode_record));
4387 target_read_memory (insn_addr, &buf[0], insn_size);
4388 aarch64_record.aarch64_insn
4389 = (uint32_t) extract_unsigned_integer (&buf[0],
4391 gdbarch_byte_order (gdbarch));
4392 aarch64_record.regcache = regcache;
4393 aarch64_record.this_addr = insn_addr;
4394 aarch64_record.gdbarch = gdbarch;
4396 ret = aarch64_record_decode_insn_handler (&aarch64_record);
4397 if (ret == AARCH64_RECORD_UNSUPPORTED)
4399 printf_unfiltered (_("Process record does not support instruction "
4400 "0x%0x at address %s.\n"),
4401 aarch64_record.aarch64_insn,
4402 paddress (gdbarch, insn_addr));
4408 /* Record registers. */
4409 record_full_arch_list_add_reg (aarch64_record.regcache,
4411 /* Always record register CPSR. */
4412 record_full_arch_list_add_reg (aarch64_record.regcache,
4413 AARCH64_CPSR_REGNUM);
4414 if (aarch64_record.aarch64_regs)
4415 for (rec_no = 0; rec_no < aarch64_record.reg_rec_count; rec_no++)
4416 if (record_full_arch_list_add_reg (aarch64_record.regcache,
4417 aarch64_record.aarch64_regs[rec_no]))
4420 /* Record memories. */
4421 if (aarch64_record.aarch64_mems)
4422 for (rec_no = 0; rec_no < aarch64_record.mem_rec_count; rec_no++)
4423 if (record_full_arch_list_add_mem
4424 ((CORE_ADDR)aarch64_record.aarch64_mems[rec_no].addr,
4425 aarch64_record.aarch64_mems[rec_no].len))
4428 if (record_full_arch_list_add_end ())
4432 deallocate_reg_mem (&aarch64_record);