| 1 | /* Common target dependent code for GDB on AArch64 systems. |
| 2 | |
| 3 | Copyright (C) 2009-2018 Free Software Foundation, Inc. |
| 4 | Contributed by ARM Ltd. |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 3 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | |
| 23 | #include "frame.h" |
| 24 | #include "inferior.h" |
| 25 | #include "gdbcmd.h" |
| 26 | #include "gdbcore.h" |
| 27 | #include "dis-asm.h" |
| 28 | #include "regcache.h" |
| 29 | #include "reggroups.h" |
| 30 | #include "value.h" |
| 31 | #include "arch-utils.h" |
| 32 | #include "osabi.h" |
| 33 | #include "frame-unwind.h" |
| 34 | #include "frame-base.h" |
| 35 | #include "trad-frame.h" |
| 36 | #include "objfiles.h" |
| 37 | #include "dwarf2-frame.h" |
| 38 | #include "gdbtypes.h" |
| 39 | #include "prologue-value.h" |
| 40 | #include "target-descriptions.h" |
| 41 | #include "user-regs.h" |
| 42 | #include "language.h" |
| 43 | #include "infcall.h" |
| 44 | #include "ax.h" |
| 45 | #include "ax-gdb.h" |
| 46 | #include "selftest.h" |
| 47 | |
| 48 | #include "aarch64-tdep.h" |
| 49 | |
| 50 | #include "elf-bfd.h" |
| 51 | #include "elf/aarch64.h" |
| 52 | |
| 53 | #include "vec.h" |
| 54 | |
| 55 | #include "record.h" |
| 56 | #include "record-full.h" |
| 57 | #include "arch/aarch64-insn.h" |
| 58 | |
| 59 | #include "opcode/aarch64.h" |
| 60 | #include <algorithm> |
| 61 | |
| 62 | #define submask(x) ((1L << ((x) + 1)) - 1) |
| 63 | #define bit(obj,st) (((obj) >> (st)) & 1) |
| 64 | #define bits(obj,st,fn) (((obj) >> (st)) & submask ((fn) - (st))) |
| 65 | |
| 66 | /* Pseudo register base numbers. */ |
| 67 | #define AARCH64_Q0_REGNUM 0 |
| 68 | #define AARCH64_D0_REGNUM (AARCH64_Q0_REGNUM + AARCH64_D_REGISTER_COUNT) |
| 69 | #define AARCH64_S0_REGNUM (AARCH64_D0_REGNUM + 32) |
| 70 | #define AARCH64_H0_REGNUM (AARCH64_S0_REGNUM + 32) |
| 71 | #define AARCH64_B0_REGNUM (AARCH64_H0_REGNUM + 32) |
| 72 | #define AARCH64_SVE_V0_REGNUM (AARCH64_B0_REGNUM + 32) |
| 73 | |
| 74 | /* All possible aarch64 target descriptors. */ |
| 75 | struct target_desc *tdesc_aarch64_list[AARCH64_MAX_SVE_VQ + 1]; |
| 76 | |
| 77 | /* The standard register names, and all the valid aliases for them. */ |
| 78 | static const struct |
| 79 | { |
| 80 | const char *const name; |
| 81 | int regnum; |
| 82 | } aarch64_register_aliases[] = |
| 83 | { |
| 84 | /* 64-bit register names. */ |
| 85 | {"fp", AARCH64_FP_REGNUM}, |
| 86 | {"lr", AARCH64_LR_REGNUM}, |
| 87 | {"sp", AARCH64_SP_REGNUM}, |
| 88 | |
| 89 | /* 32-bit register names. */ |
| 90 | {"w0", AARCH64_X0_REGNUM + 0}, |
| 91 | {"w1", AARCH64_X0_REGNUM + 1}, |
| 92 | {"w2", AARCH64_X0_REGNUM + 2}, |
| 93 | {"w3", AARCH64_X0_REGNUM + 3}, |
| 94 | {"w4", AARCH64_X0_REGNUM + 4}, |
| 95 | {"w5", AARCH64_X0_REGNUM + 5}, |
| 96 | {"w6", AARCH64_X0_REGNUM + 6}, |
| 97 | {"w7", AARCH64_X0_REGNUM + 7}, |
| 98 | {"w8", AARCH64_X0_REGNUM + 8}, |
| 99 | {"w9", AARCH64_X0_REGNUM + 9}, |
| 100 | {"w10", AARCH64_X0_REGNUM + 10}, |
| 101 | {"w11", AARCH64_X0_REGNUM + 11}, |
| 102 | {"w12", AARCH64_X0_REGNUM + 12}, |
| 103 | {"w13", AARCH64_X0_REGNUM + 13}, |
| 104 | {"w14", AARCH64_X0_REGNUM + 14}, |
| 105 | {"w15", AARCH64_X0_REGNUM + 15}, |
| 106 | {"w16", AARCH64_X0_REGNUM + 16}, |
| 107 | {"w17", AARCH64_X0_REGNUM + 17}, |
| 108 | {"w18", AARCH64_X0_REGNUM + 18}, |
| 109 | {"w19", AARCH64_X0_REGNUM + 19}, |
| 110 | {"w20", AARCH64_X0_REGNUM + 20}, |
| 111 | {"w21", AARCH64_X0_REGNUM + 21}, |
| 112 | {"w22", AARCH64_X0_REGNUM + 22}, |
| 113 | {"w23", AARCH64_X0_REGNUM + 23}, |
| 114 | {"w24", AARCH64_X0_REGNUM + 24}, |
| 115 | {"w25", AARCH64_X0_REGNUM + 25}, |
| 116 | {"w26", AARCH64_X0_REGNUM + 26}, |
| 117 | {"w27", AARCH64_X0_REGNUM + 27}, |
| 118 | {"w28", AARCH64_X0_REGNUM + 28}, |
| 119 | {"w29", AARCH64_X0_REGNUM + 29}, |
| 120 | {"w30", AARCH64_X0_REGNUM + 30}, |
| 121 | |
| 122 | /* specials */ |
| 123 | {"ip0", AARCH64_X0_REGNUM + 16}, |
| 124 | {"ip1", AARCH64_X0_REGNUM + 17} |
| 125 | }; |
| 126 | |
| 127 | /* The required core 'R' registers. */ |
| 128 | static const char *const aarch64_r_register_names[] = |
| 129 | { |
| 130 | /* These registers must appear in consecutive RAW register number |
| 131 | order and they must begin with AARCH64_X0_REGNUM! */ |
| 132 | "x0", "x1", "x2", "x3", |
| 133 | "x4", "x5", "x6", "x7", |
| 134 | "x8", "x9", "x10", "x11", |
| 135 | "x12", "x13", "x14", "x15", |
| 136 | "x16", "x17", "x18", "x19", |
| 137 | "x20", "x21", "x22", "x23", |
| 138 | "x24", "x25", "x26", "x27", |
| 139 | "x28", "x29", "x30", "sp", |
| 140 | "pc", "cpsr" |
| 141 | }; |
| 142 | |
| 143 | /* The FP/SIMD 'V' registers. */ |
| 144 | static const char *const aarch64_v_register_names[] = |
| 145 | { |
| 146 | /* These registers must appear in consecutive RAW register number |
| 147 | order and they must begin with AARCH64_V0_REGNUM! */ |
| 148 | "v0", "v1", "v2", "v3", |
| 149 | "v4", "v5", "v6", "v7", |
| 150 | "v8", "v9", "v10", "v11", |
| 151 | "v12", "v13", "v14", "v15", |
| 152 | "v16", "v17", "v18", "v19", |
| 153 | "v20", "v21", "v22", "v23", |
| 154 | "v24", "v25", "v26", "v27", |
| 155 | "v28", "v29", "v30", "v31", |
| 156 | "fpsr", |
| 157 | "fpcr" |
| 158 | }; |
| 159 | |
| 160 | /* The SVE 'Z' and 'P' registers. */ |
| 161 | static const char *const aarch64_sve_register_names[] = |
| 162 | { |
| 163 | /* These registers must appear in consecutive RAW register number |
| 164 | order and they must begin with AARCH64_SVE_Z0_REGNUM! */ |
| 165 | "z0", "z1", "z2", "z3", |
| 166 | "z4", "z5", "z6", "z7", |
| 167 | "z8", "z9", "z10", "z11", |
| 168 | "z12", "z13", "z14", "z15", |
| 169 | "z16", "z17", "z18", "z19", |
| 170 | "z20", "z21", "z22", "z23", |
| 171 | "z24", "z25", "z26", "z27", |
| 172 | "z28", "z29", "z30", "z31", |
| 173 | "fpsr", "fpcr", |
| 174 | "p0", "p1", "p2", "p3", |
| 175 | "p4", "p5", "p6", "p7", |
| 176 | "p8", "p9", "p10", "p11", |
| 177 | "p12", "p13", "p14", "p15", |
| 178 | "ffr", "vg" |
| 179 | }; |
| 180 | |
| 181 | /* AArch64 prologue cache structure. */ |
| 182 | struct aarch64_prologue_cache |
| 183 | { |
| 184 | /* The program counter at the start of the function. It is used to |
| 185 | identify this frame as a prologue frame. */ |
| 186 | CORE_ADDR func; |
| 187 | |
| 188 | /* The program counter at the time this frame was created; i.e. where |
| 189 | this function was called from. It is used to identify this frame as a |
| 190 | stub frame. */ |
| 191 | CORE_ADDR prev_pc; |
| 192 | |
| 193 | /* The stack pointer at the time this frame was created; i.e. the |
| 194 | caller's stack pointer when this function was called. It is used |
| 195 | to identify this frame. */ |
| 196 | CORE_ADDR prev_sp; |
| 197 | |
| 198 | /* Is the target available to read from? */ |
| 199 | int available_p; |
| 200 | |
| 201 | /* The frame base for this frame is just prev_sp - frame size. |
| 202 | FRAMESIZE is the distance from the frame pointer to the |
| 203 | initial stack pointer. */ |
| 204 | int framesize; |
| 205 | |
| 206 | /* The register used to hold the frame pointer for this frame. */ |
| 207 | int framereg; |
| 208 | |
| 209 | /* Saved register offsets. */ |
| 210 | struct trad_frame_saved_reg *saved_regs; |
| 211 | }; |
| 212 | |
| 213 | static void |
| 214 | show_aarch64_debug (struct ui_file *file, int from_tty, |
| 215 | struct cmd_list_element *c, const char *value) |
| 216 | { |
| 217 | fprintf_filtered (file, _("AArch64 debugging is %s.\n"), value); |
| 218 | } |
| 219 | |
| 220 | namespace { |
| 221 | |
| 222 | /* Abstract instruction reader. */ |
| 223 | |
| 224 | class abstract_instruction_reader |
| 225 | { |
| 226 | public: |
| 227 | /* Read in one instruction. */ |
| 228 | virtual ULONGEST read (CORE_ADDR memaddr, int len, |
| 229 | enum bfd_endian byte_order) = 0; |
| 230 | }; |
| 231 | |
| 232 | /* Instruction reader from real target. */ |
| 233 | |
| 234 | class instruction_reader : public abstract_instruction_reader |
| 235 | { |
| 236 | public: |
| 237 | ULONGEST read (CORE_ADDR memaddr, int len, enum bfd_endian byte_order) |
| 238 | override |
| 239 | { |
| 240 | return read_code_unsigned_integer (memaddr, len, byte_order); |
| 241 | } |
| 242 | }; |
| 243 | |
| 244 | } // namespace |
| 245 | |
| 246 | /* Analyze a prologue, looking for a recognizable stack frame |
| 247 | and frame pointer. Scan until we encounter a store that could |
| 248 | clobber the stack frame unexpectedly, or an unknown instruction. */ |
| 249 | |
| 250 | static CORE_ADDR |
| 251 | aarch64_analyze_prologue (struct gdbarch *gdbarch, |
| 252 | CORE_ADDR start, CORE_ADDR limit, |
| 253 | struct aarch64_prologue_cache *cache, |
| 254 | abstract_instruction_reader& reader) |
| 255 | { |
| 256 | enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch); |
| 257 | int i; |
| 258 | /* Track X registers and D registers in prologue. */ |
| 259 | pv_t regs[AARCH64_X_REGISTER_COUNT + AARCH64_D_REGISTER_COUNT]; |
| 260 | |
| 261 | for (i = 0; i < AARCH64_X_REGISTER_COUNT + AARCH64_D_REGISTER_COUNT; i++) |
| 262 | regs[i] = pv_register (i, 0); |
| 263 | pv_area stack (AARCH64_SP_REGNUM, gdbarch_addr_bit (gdbarch)); |
| 264 | |
| 265 | for (; start < limit; start += 4) |
| 266 | { |
| 267 | uint32_t insn; |
| 268 | aarch64_inst inst; |
| 269 | |
| 270 | insn = reader.read (start, 4, byte_order_for_code); |
| 271 | |
| 272 | if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0) |
| 273 | break; |
| 274 | |
| 275 | if (inst.opcode->iclass == addsub_imm |
| 276 | && (inst.opcode->op == OP_ADD |
| 277 | || strcmp ("sub", inst.opcode->name) == 0)) |
| 278 | { |
| 279 | unsigned rd = inst.operands[0].reg.regno; |
| 280 | unsigned rn = inst.operands[1].reg.regno; |
| 281 | |
| 282 | gdb_assert (aarch64_num_of_operands (inst.opcode) == 3); |
| 283 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd_SP); |
| 284 | gdb_assert (inst.operands[1].type == AARCH64_OPND_Rn_SP); |
| 285 | gdb_assert (inst.operands[2].type == AARCH64_OPND_AIMM); |
| 286 | |
| 287 | if (inst.opcode->op == OP_ADD) |
| 288 | { |
| 289 | regs[rd] = pv_add_constant (regs[rn], |
| 290 | inst.operands[2].imm.value); |
| 291 | } |
| 292 | else |
| 293 | { |
| 294 | regs[rd] = pv_add_constant (regs[rn], |
| 295 | -inst.operands[2].imm.value); |
| 296 | } |
| 297 | } |
| 298 | else if (inst.opcode->iclass == pcreladdr |
| 299 | && inst.operands[1].type == AARCH64_OPND_ADDR_ADRP) |
| 300 | { |
| 301 | gdb_assert (aarch64_num_of_operands (inst.opcode) == 2); |
| 302 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd); |
| 303 | |
| 304 | regs[inst.operands[0].reg.regno] = pv_unknown (); |
| 305 | } |
| 306 | else if (inst.opcode->iclass == branch_imm) |
| 307 | { |
| 308 | /* Stop analysis on branch. */ |
| 309 | break; |
| 310 | } |
| 311 | else if (inst.opcode->iclass == condbranch) |
| 312 | { |
| 313 | /* Stop analysis on branch. */ |
| 314 | break; |
| 315 | } |
| 316 | else if (inst.opcode->iclass == branch_reg) |
| 317 | { |
| 318 | /* Stop analysis on branch. */ |
| 319 | break; |
| 320 | } |
| 321 | else if (inst.opcode->iclass == compbranch) |
| 322 | { |
| 323 | /* Stop analysis on branch. */ |
| 324 | break; |
| 325 | } |
| 326 | else if (inst.opcode->op == OP_MOVZ) |
| 327 | { |
| 328 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd); |
| 329 | regs[inst.operands[0].reg.regno] = pv_unknown (); |
| 330 | } |
| 331 | else if (inst.opcode->iclass == log_shift |
| 332 | && strcmp (inst.opcode->name, "orr") == 0) |
| 333 | { |
| 334 | unsigned rd = inst.operands[0].reg.regno; |
| 335 | unsigned rn = inst.operands[1].reg.regno; |
| 336 | unsigned rm = inst.operands[2].reg.regno; |
| 337 | |
| 338 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rd); |
| 339 | gdb_assert (inst.operands[1].type == AARCH64_OPND_Rn); |
| 340 | gdb_assert (inst.operands[2].type == AARCH64_OPND_Rm_SFT); |
| 341 | |
| 342 | if (inst.operands[2].shifter.amount == 0 |
| 343 | && rn == AARCH64_SP_REGNUM) |
| 344 | regs[rd] = regs[rm]; |
| 345 | else |
| 346 | { |
| 347 | if (aarch64_debug) |
| 348 | { |
| 349 | debug_printf ("aarch64: prologue analysis gave up " |
| 350 | "addr=%s opcode=0x%x (orr x register)\n", |
| 351 | core_addr_to_string_nz (start), insn); |
| 352 | } |
| 353 | break; |
| 354 | } |
| 355 | } |
| 356 | else if (inst.opcode->op == OP_STUR) |
| 357 | { |
| 358 | unsigned rt = inst.operands[0].reg.regno; |
| 359 | unsigned rn = inst.operands[1].addr.base_regno; |
| 360 | int is64 |
| 361 | = (aarch64_get_qualifier_esize (inst.operands[0].qualifier) == 8); |
| 362 | |
| 363 | gdb_assert (aarch64_num_of_operands (inst.opcode) == 2); |
| 364 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt); |
| 365 | gdb_assert (inst.operands[1].type == AARCH64_OPND_ADDR_SIMM9); |
| 366 | gdb_assert (!inst.operands[1].addr.offset.is_reg); |
| 367 | |
| 368 | stack.store (pv_add_constant (regs[rn], |
| 369 | inst.operands[1].addr.offset.imm), |
| 370 | is64 ? 8 : 4, regs[rt]); |
| 371 | } |
| 372 | else if ((inst.opcode->iclass == ldstpair_off |
| 373 | || (inst.opcode->iclass == ldstpair_indexed |
| 374 | && inst.operands[2].addr.preind)) |
| 375 | && strcmp ("stp", inst.opcode->name) == 0) |
| 376 | { |
| 377 | /* STP with addressing mode Pre-indexed and Base register. */ |
| 378 | unsigned rt1; |
| 379 | unsigned rt2; |
| 380 | unsigned rn = inst.operands[2].addr.base_regno; |
| 381 | int32_t imm = inst.operands[2].addr.offset.imm; |
| 382 | |
| 383 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt |
| 384 | || inst.operands[0].type == AARCH64_OPND_Ft); |
| 385 | gdb_assert (inst.operands[1].type == AARCH64_OPND_Rt2 |
| 386 | || inst.operands[1].type == AARCH64_OPND_Ft2); |
| 387 | gdb_assert (inst.operands[2].type == AARCH64_OPND_ADDR_SIMM7); |
| 388 | gdb_assert (!inst.operands[2].addr.offset.is_reg); |
| 389 | |
| 390 | /* If recording this store would invalidate the store area |
| 391 | (perhaps because rn is not known) then we should abandon |
| 392 | further prologue analysis. */ |
| 393 | if (stack.store_would_trash (pv_add_constant (regs[rn], imm))) |
| 394 | break; |
| 395 | |
| 396 | if (stack.store_would_trash (pv_add_constant (regs[rn], imm + 8))) |
| 397 | break; |
| 398 | |
| 399 | rt1 = inst.operands[0].reg.regno; |
| 400 | rt2 = inst.operands[1].reg.regno; |
| 401 | if (inst.operands[0].type == AARCH64_OPND_Ft) |
| 402 | { |
| 403 | /* Only bottom 64-bit of each V register (D register) need |
| 404 | to be preserved. */ |
| 405 | gdb_assert (inst.operands[0].qualifier == AARCH64_OPND_QLF_S_D); |
| 406 | rt1 += AARCH64_X_REGISTER_COUNT; |
| 407 | rt2 += AARCH64_X_REGISTER_COUNT; |
| 408 | } |
| 409 | |
| 410 | stack.store (pv_add_constant (regs[rn], imm), 8, |
| 411 | regs[rt1]); |
| 412 | stack.store (pv_add_constant (regs[rn], imm + 8), 8, |
| 413 | regs[rt2]); |
| 414 | |
| 415 | if (inst.operands[2].addr.writeback) |
| 416 | regs[rn] = pv_add_constant (regs[rn], imm); |
| 417 | |
| 418 | } |
| 419 | else if ((inst.opcode->iclass == ldst_imm9 /* Signed immediate. */ |
| 420 | || (inst.opcode->iclass == ldst_pos /* Unsigned immediate. */ |
| 421 | && (inst.opcode->op == OP_STR_POS |
| 422 | || inst.opcode->op == OP_STRF_POS))) |
| 423 | && inst.operands[1].addr.base_regno == AARCH64_SP_REGNUM |
| 424 | && strcmp ("str", inst.opcode->name) == 0) |
| 425 | { |
| 426 | /* STR (immediate) */ |
| 427 | unsigned int rt = inst.operands[0].reg.regno; |
| 428 | int32_t imm = inst.operands[1].addr.offset.imm; |
| 429 | unsigned int rn = inst.operands[1].addr.base_regno; |
| 430 | bool is64 |
| 431 | = (aarch64_get_qualifier_esize (inst.operands[0].qualifier) == 8); |
| 432 | gdb_assert (inst.operands[0].type == AARCH64_OPND_Rt |
| 433 | || inst.operands[0].type == AARCH64_OPND_Ft); |
| 434 | |
| 435 | if (inst.operands[0].type == AARCH64_OPND_Ft) |
| 436 | { |
| 437 | /* Only bottom 64-bit of each V register (D register) need |
| 438 | to be preserved. */ |
| 439 | gdb_assert (inst.operands[0].qualifier == AARCH64_OPND_QLF_S_D); |
| 440 | rt += AARCH64_X_REGISTER_COUNT; |
| 441 | } |
| 442 | |
| 443 | stack.store (pv_add_constant (regs[rn], imm), |
| 444 | is64 ? 8 : 4, regs[rt]); |
| 445 | if (inst.operands[1].addr.writeback) |
| 446 | regs[rn] = pv_add_constant (regs[rn], imm); |
| 447 | } |
| 448 | else if (inst.opcode->iclass == testbranch) |
| 449 | { |
| 450 | /* Stop analysis on branch. */ |
| 451 | break; |
| 452 | } |
| 453 | else |
| 454 | { |
| 455 | if (aarch64_debug) |
| 456 | { |
| 457 | debug_printf ("aarch64: prologue analysis gave up addr=%s" |
| 458 | " opcode=0x%x\n", |
| 459 | core_addr_to_string_nz (start), insn); |
| 460 | } |
| 461 | break; |
| 462 | } |
| 463 | } |
| 464 | |
| 465 | if (cache == NULL) |
| 466 | return start; |
| 467 | |
| 468 | if (pv_is_register (regs[AARCH64_FP_REGNUM], AARCH64_SP_REGNUM)) |
| 469 | { |
| 470 | /* Frame pointer is fp. Frame size is constant. */ |
| 471 | cache->framereg = AARCH64_FP_REGNUM; |
| 472 | cache->framesize = -regs[AARCH64_FP_REGNUM].k; |
| 473 | } |
| 474 | else if (pv_is_register (regs[AARCH64_SP_REGNUM], AARCH64_SP_REGNUM)) |
| 475 | { |
| 476 | /* Try the stack pointer. */ |
| 477 | cache->framesize = -regs[AARCH64_SP_REGNUM].k; |
| 478 | cache->framereg = AARCH64_SP_REGNUM; |
| 479 | } |
| 480 | else |
| 481 | { |
| 482 | /* We're just out of luck. We don't know where the frame is. */ |
| 483 | cache->framereg = -1; |
| 484 | cache->framesize = 0; |
| 485 | } |
| 486 | |
| 487 | for (i = 0; i < AARCH64_X_REGISTER_COUNT; i++) |
| 488 | { |
| 489 | CORE_ADDR offset; |
| 490 | |
| 491 | if (stack.find_reg (gdbarch, i, &offset)) |
| 492 | cache->saved_regs[i].addr = offset; |
| 493 | } |
| 494 | |
| 495 | for (i = 0; i < AARCH64_D_REGISTER_COUNT; i++) |
| 496 | { |
| 497 | int regnum = gdbarch_num_regs (gdbarch); |
| 498 | CORE_ADDR offset; |
| 499 | |
| 500 | if (stack.find_reg (gdbarch, i + AARCH64_X_REGISTER_COUNT, |
| 501 | &offset)) |
| 502 | cache->saved_regs[i + regnum + AARCH64_D0_REGNUM].addr = offset; |
| 503 | } |
| 504 | |
| 505 | return start; |
| 506 | } |
| 507 | |
| 508 | static CORE_ADDR |
| 509 | aarch64_analyze_prologue (struct gdbarch *gdbarch, |
| 510 | CORE_ADDR start, CORE_ADDR limit, |
| 511 | struct aarch64_prologue_cache *cache) |
| 512 | { |
| 513 | instruction_reader reader; |
| 514 | |
| 515 | return aarch64_analyze_prologue (gdbarch, start, limit, cache, |
| 516 | reader); |
| 517 | } |
| 518 | |
| 519 | #if GDB_SELF_TEST |
| 520 | |
| 521 | namespace selftests { |
| 522 | |
| 523 | /* Instruction reader from manually cooked instruction sequences. */ |
| 524 | |
| 525 | class instruction_reader_test : public abstract_instruction_reader |
| 526 | { |
| 527 | public: |
| 528 | template<size_t SIZE> |
| 529 | explicit instruction_reader_test (const uint32_t (&insns)[SIZE]) |
| 530 | : m_insns (insns), m_insns_size (SIZE) |
| 531 | {} |
| 532 | |
| 533 | ULONGEST read (CORE_ADDR memaddr, int len, enum bfd_endian byte_order) |
| 534 | override |
| 535 | { |
| 536 | SELF_CHECK (len == 4); |
| 537 | SELF_CHECK (memaddr % 4 == 0); |
| 538 | SELF_CHECK (memaddr / 4 < m_insns_size); |
| 539 | |
| 540 | return m_insns[memaddr / 4]; |
| 541 | } |
| 542 | |
| 543 | private: |
| 544 | const uint32_t *m_insns; |
| 545 | size_t m_insns_size; |
| 546 | }; |
| 547 | |
| 548 | static void |
| 549 | aarch64_analyze_prologue_test (void) |
| 550 | { |
| 551 | struct gdbarch_info info; |
| 552 | |
| 553 | gdbarch_info_init (&info); |
| 554 | info.bfd_arch_info = bfd_scan_arch ("aarch64"); |
| 555 | |
| 556 | struct gdbarch *gdbarch = gdbarch_find_by_info (info); |
| 557 | SELF_CHECK (gdbarch != NULL); |
| 558 | |
| 559 | /* Test the simple prologue in which frame pointer is used. */ |
| 560 | { |
| 561 | struct aarch64_prologue_cache cache; |
| 562 | cache.saved_regs = trad_frame_alloc_saved_regs (gdbarch); |
| 563 | |
| 564 | static const uint32_t insns[] = { |
| 565 | 0xa9af7bfd, /* stp x29, x30, [sp,#-272]! */ |
| 566 | 0x910003fd, /* mov x29, sp */ |
| 567 | 0x97ffffe6, /* bl 0x400580 */ |
| 568 | }; |
| 569 | instruction_reader_test reader (insns); |
| 570 | |
| 571 | CORE_ADDR end = aarch64_analyze_prologue (gdbarch, 0, 128, &cache, reader); |
| 572 | SELF_CHECK (end == 4 * 2); |
| 573 | |
| 574 | SELF_CHECK (cache.framereg == AARCH64_FP_REGNUM); |
| 575 | SELF_CHECK (cache.framesize == 272); |
| 576 | |
| 577 | for (int i = 0; i < AARCH64_X_REGISTER_COUNT; i++) |
| 578 | { |
| 579 | if (i == AARCH64_FP_REGNUM) |
| 580 | SELF_CHECK (cache.saved_regs[i].addr == -272); |
| 581 | else if (i == AARCH64_LR_REGNUM) |
| 582 | SELF_CHECK (cache.saved_regs[i].addr == -264); |
| 583 | else |
| 584 | SELF_CHECK (cache.saved_regs[i].addr == -1); |
| 585 | } |
| 586 | |
| 587 | for (int i = 0; i < AARCH64_D_REGISTER_COUNT; i++) |
| 588 | { |
| 589 | int regnum = gdbarch_num_regs (gdbarch); |
| 590 | |
| 591 | SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr |
| 592 | == -1); |
| 593 | } |
| 594 | } |
| 595 | |
| 596 | /* Test a prologue in which STR is used and frame pointer is not |
| 597 | used. */ |
| 598 | { |
| 599 | struct aarch64_prologue_cache cache; |
| 600 | cache.saved_regs = trad_frame_alloc_saved_regs (gdbarch); |
| 601 | |
| 602 | static const uint32_t insns[] = { |
| 603 | 0xf81d0ff3, /* str x19, [sp, #-48]! */ |
| 604 | 0xb9002fe0, /* str w0, [sp, #44] */ |
| 605 | 0xf90013e1, /* str x1, [sp, #32]*/ |
| 606 | 0xfd000fe0, /* str d0, [sp, #24] */ |
| 607 | 0xaa0203f3, /* mov x19, x2 */ |
| 608 | 0xf94013e0, /* ldr x0, [sp, #32] */ |
| 609 | }; |
| 610 | instruction_reader_test reader (insns); |
| 611 | |
| 612 | CORE_ADDR end = aarch64_analyze_prologue (gdbarch, 0, 128, &cache, reader); |
| 613 | |
| 614 | SELF_CHECK (end == 4 * 5); |
| 615 | |
| 616 | SELF_CHECK (cache.framereg == AARCH64_SP_REGNUM); |
| 617 | SELF_CHECK (cache.framesize == 48); |
| 618 | |
| 619 | for (int i = 0; i < AARCH64_X_REGISTER_COUNT; i++) |
| 620 | { |
| 621 | if (i == 1) |
| 622 | SELF_CHECK (cache.saved_regs[i].addr == -16); |
| 623 | else if (i == 19) |
| 624 | SELF_CHECK (cache.saved_regs[i].addr == -48); |
| 625 | else |
| 626 | SELF_CHECK (cache.saved_regs[i].addr == -1); |
| 627 | } |
| 628 | |
| 629 | for (int i = 0; i < AARCH64_D_REGISTER_COUNT; i++) |
| 630 | { |
| 631 | int regnum = gdbarch_num_regs (gdbarch); |
| 632 | |
| 633 | if (i == 0) |
| 634 | SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr |
| 635 | == -24); |
| 636 | else |
| 637 | SELF_CHECK (cache.saved_regs[i + regnum + AARCH64_D0_REGNUM].addr |
| 638 | == -1); |
| 639 | } |
| 640 | } |
| 641 | } |
| 642 | } // namespace selftests |
| 643 | #endif /* GDB_SELF_TEST */ |
| 644 | |
| 645 | /* Implement the "skip_prologue" gdbarch method. */ |
| 646 | |
| 647 | static CORE_ADDR |
| 648 | aarch64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 649 | { |
| 650 | CORE_ADDR func_addr, limit_pc; |
| 651 | |
| 652 | /* See if we can determine the end of the prologue via the symbol |
| 653 | table. If so, then return either PC, or the PC after the |
| 654 | prologue, whichever is greater. */ |
| 655 | if (find_pc_partial_function (pc, NULL, &func_addr, NULL)) |
| 656 | { |
| 657 | CORE_ADDR post_prologue_pc |
| 658 | = skip_prologue_using_sal (gdbarch, func_addr); |
| 659 | |
| 660 | if (post_prologue_pc != 0) |
| 661 | return std::max (pc, post_prologue_pc); |
| 662 | } |
| 663 | |
| 664 | /* Can't determine prologue from the symbol table, need to examine |
| 665 | instructions. */ |
| 666 | |
| 667 | /* Find an upper limit on the function prologue using the debug |
| 668 | information. If the debug information could not be used to |
| 669 | provide that bound, then use an arbitrary large number as the |
| 670 | upper bound. */ |
| 671 | limit_pc = skip_prologue_using_sal (gdbarch, pc); |
| 672 | if (limit_pc == 0) |
| 673 | limit_pc = pc + 128; /* Magic. */ |
| 674 | |
| 675 | /* Try disassembling prologue. */ |
| 676 | return aarch64_analyze_prologue (gdbarch, pc, limit_pc, NULL); |
| 677 | } |
| 678 | |
| 679 | /* Scan the function prologue for THIS_FRAME and populate the prologue |
| 680 | cache CACHE. */ |
| 681 | |
| 682 | static void |
| 683 | aarch64_scan_prologue (struct frame_info *this_frame, |
| 684 | struct aarch64_prologue_cache *cache) |
| 685 | { |
| 686 | CORE_ADDR block_addr = get_frame_address_in_block (this_frame); |
| 687 | CORE_ADDR prologue_start; |
| 688 | CORE_ADDR prologue_end; |
| 689 | CORE_ADDR prev_pc = get_frame_pc (this_frame); |
| 690 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 691 | |
| 692 | cache->prev_pc = prev_pc; |
| 693 | |
| 694 | /* Assume we do not find a frame. */ |
| 695 | cache->framereg = -1; |
| 696 | cache->framesize = 0; |
| 697 | |
| 698 | if (find_pc_partial_function (block_addr, NULL, &prologue_start, |
| 699 | &prologue_end)) |
| 700 | { |
| 701 | struct symtab_and_line sal = find_pc_line (prologue_start, 0); |
| 702 | |
| 703 | if (sal.line == 0) |
| 704 | { |
| 705 | /* No line info so use the current PC. */ |
| 706 | prologue_end = prev_pc; |
| 707 | } |
| 708 | else if (sal.end < prologue_end) |
| 709 | { |
| 710 | /* The next line begins after the function end. */ |
| 711 | prologue_end = sal.end; |
| 712 | } |
| 713 | |
| 714 | prologue_end = std::min (prologue_end, prev_pc); |
| 715 | aarch64_analyze_prologue (gdbarch, prologue_start, prologue_end, cache); |
| 716 | } |
| 717 | else |
| 718 | { |
| 719 | CORE_ADDR frame_loc; |
| 720 | |
| 721 | frame_loc = get_frame_register_unsigned (this_frame, AARCH64_FP_REGNUM); |
| 722 | if (frame_loc == 0) |
| 723 | return; |
| 724 | |
| 725 | cache->framereg = AARCH64_FP_REGNUM; |
| 726 | cache->framesize = 16; |
| 727 | cache->saved_regs[29].addr = 0; |
| 728 | cache->saved_regs[30].addr = 8; |
| 729 | } |
| 730 | } |
| 731 | |
| 732 | /* Fill in *CACHE with information about the prologue of *THIS_FRAME. This |
| 733 | function may throw an exception if the inferior's registers or memory is |
| 734 | not available. */ |
| 735 | |
| 736 | static void |
| 737 | aarch64_make_prologue_cache_1 (struct frame_info *this_frame, |
| 738 | struct aarch64_prologue_cache *cache) |
| 739 | { |
| 740 | CORE_ADDR unwound_fp; |
| 741 | int reg; |
| 742 | |
| 743 | aarch64_scan_prologue (this_frame, cache); |
| 744 | |
| 745 | if (cache->framereg == -1) |
| 746 | return; |
| 747 | |
| 748 | unwound_fp = get_frame_register_unsigned (this_frame, cache->framereg); |
| 749 | if (unwound_fp == 0) |
| 750 | return; |
| 751 | |
| 752 | cache->prev_sp = unwound_fp + cache->framesize; |
| 753 | |
| 754 | /* Calculate actual addresses of saved registers using offsets |
| 755 | determined by aarch64_analyze_prologue. */ |
| 756 | for (reg = 0; reg < gdbarch_num_regs (get_frame_arch (this_frame)); reg++) |
| 757 | if (trad_frame_addr_p (cache->saved_regs, reg)) |
| 758 | cache->saved_regs[reg].addr += cache->prev_sp; |
| 759 | |
| 760 | cache->func = get_frame_func (this_frame); |
| 761 | |
| 762 | cache->available_p = 1; |
| 763 | } |
| 764 | |
| 765 | /* Allocate and fill in *THIS_CACHE with information about the prologue of |
| 766 | *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated. |
| 767 | Return a pointer to the current aarch64_prologue_cache in |
| 768 | *THIS_CACHE. */ |
| 769 | |
| 770 | static struct aarch64_prologue_cache * |
| 771 | aarch64_make_prologue_cache (struct frame_info *this_frame, void **this_cache) |
| 772 | { |
| 773 | struct aarch64_prologue_cache *cache; |
| 774 | |
| 775 | if (*this_cache != NULL) |
| 776 | return (struct aarch64_prologue_cache *) *this_cache; |
| 777 | |
| 778 | cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache); |
| 779 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
| 780 | *this_cache = cache; |
| 781 | |
| 782 | TRY |
| 783 | { |
| 784 | aarch64_make_prologue_cache_1 (this_frame, cache); |
| 785 | } |
| 786 | CATCH (ex, RETURN_MASK_ERROR) |
| 787 | { |
| 788 | if (ex.error != NOT_AVAILABLE_ERROR) |
| 789 | throw_exception (ex); |
| 790 | } |
| 791 | END_CATCH |
| 792 | |
| 793 | return cache; |
| 794 | } |
| 795 | |
| 796 | /* Implement the "stop_reason" frame_unwind method. */ |
| 797 | |
| 798 | static enum unwind_stop_reason |
| 799 | aarch64_prologue_frame_unwind_stop_reason (struct frame_info *this_frame, |
| 800 | void **this_cache) |
| 801 | { |
| 802 | struct aarch64_prologue_cache *cache |
| 803 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 804 | |
| 805 | if (!cache->available_p) |
| 806 | return UNWIND_UNAVAILABLE; |
| 807 | |
| 808 | /* Halt the backtrace at "_start". */ |
| 809 | if (cache->prev_pc <= gdbarch_tdep (get_frame_arch (this_frame))->lowest_pc) |
| 810 | return UNWIND_OUTERMOST; |
| 811 | |
| 812 | /* We've hit a wall, stop. */ |
| 813 | if (cache->prev_sp == 0) |
| 814 | return UNWIND_OUTERMOST; |
| 815 | |
| 816 | return UNWIND_NO_REASON; |
| 817 | } |
| 818 | |
| 819 | /* Our frame ID for a normal frame is the current function's starting |
| 820 | PC and the caller's SP when we were called. */ |
| 821 | |
| 822 | static void |
| 823 | aarch64_prologue_this_id (struct frame_info *this_frame, |
| 824 | void **this_cache, struct frame_id *this_id) |
| 825 | { |
| 826 | struct aarch64_prologue_cache *cache |
| 827 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 828 | |
| 829 | if (!cache->available_p) |
| 830 | *this_id = frame_id_build_unavailable_stack (cache->func); |
| 831 | else |
| 832 | *this_id = frame_id_build (cache->prev_sp, cache->func); |
| 833 | } |
| 834 | |
| 835 | /* Implement the "prev_register" frame_unwind method. */ |
| 836 | |
| 837 | static struct value * |
| 838 | aarch64_prologue_prev_register (struct frame_info *this_frame, |
| 839 | void **this_cache, int prev_regnum) |
| 840 | { |
| 841 | struct aarch64_prologue_cache *cache |
| 842 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 843 | |
| 844 | /* If we are asked to unwind the PC, then we need to return the LR |
| 845 | instead. The prologue may save PC, but it will point into this |
| 846 | frame's prologue, not the next frame's resume location. */ |
| 847 | if (prev_regnum == AARCH64_PC_REGNUM) |
| 848 | { |
| 849 | CORE_ADDR lr; |
| 850 | |
| 851 | lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM); |
| 852 | return frame_unwind_got_constant (this_frame, prev_regnum, lr); |
| 853 | } |
| 854 | |
| 855 | /* SP is generally not saved to the stack, but this frame is |
| 856 | identified by the next frame's stack pointer at the time of the |
| 857 | call. The value was already reconstructed into PREV_SP. */ |
| 858 | /* |
| 859 | +----------+ ^ |
| 860 | | saved lr | | |
| 861 | +->| saved fp |--+ |
| 862 | | | | |
| 863 | | | | <- Previous SP |
| 864 | | +----------+ |
| 865 | | | saved lr | |
| 866 | +--| saved fp |<- FP |
| 867 | | | |
| 868 | | |<- SP |
| 869 | +----------+ */ |
| 870 | if (prev_regnum == AARCH64_SP_REGNUM) |
| 871 | return frame_unwind_got_constant (this_frame, prev_regnum, |
| 872 | cache->prev_sp); |
| 873 | |
| 874 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, |
| 875 | prev_regnum); |
| 876 | } |
| 877 | |
| 878 | /* AArch64 prologue unwinder. */ |
| 879 | struct frame_unwind aarch64_prologue_unwind = |
| 880 | { |
| 881 | NORMAL_FRAME, |
| 882 | aarch64_prologue_frame_unwind_stop_reason, |
| 883 | aarch64_prologue_this_id, |
| 884 | aarch64_prologue_prev_register, |
| 885 | NULL, |
| 886 | default_frame_sniffer |
| 887 | }; |
| 888 | |
| 889 | /* Allocate and fill in *THIS_CACHE with information about the prologue of |
| 890 | *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated. |
| 891 | Return a pointer to the current aarch64_prologue_cache in |
| 892 | *THIS_CACHE. */ |
| 893 | |
| 894 | static struct aarch64_prologue_cache * |
| 895 | aarch64_make_stub_cache (struct frame_info *this_frame, void **this_cache) |
| 896 | { |
| 897 | struct aarch64_prologue_cache *cache; |
| 898 | |
| 899 | if (*this_cache != NULL) |
| 900 | return (struct aarch64_prologue_cache *) *this_cache; |
| 901 | |
| 902 | cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache); |
| 903 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
| 904 | *this_cache = cache; |
| 905 | |
| 906 | TRY |
| 907 | { |
| 908 | cache->prev_sp = get_frame_register_unsigned (this_frame, |
| 909 | AARCH64_SP_REGNUM); |
| 910 | cache->prev_pc = get_frame_pc (this_frame); |
| 911 | cache->available_p = 1; |
| 912 | } |
| 913 | CATCH (ex, RETURN_MASK_ERROR) |
| 914 | { |
| 915 | if (ex.error != NOT_AVAILABLE_ERROR) |
| 916 | throw_exception (ex); |
| 917 | } |
| 918 | END_CATCH |
| 919 | |
| 920 | return cache; |
| 921 | } |
| 922 | |
| 923 | /* Implement the "stop_reason" frame_unwind method. */ |
| 924 | |
| 925 | static enum unwind_stop_reason |
| 926 | aarch64_stub_frame_unwind_stop_reason (struct frame_info *this_frame, |
| 927 | void **this_cache) |
| 928 | { |
| 929 | struct aarch64_prologue_cache *cache |
| 930 | = aarch64_make_stub_cache (this_frame, this_cache); |
| 931 | |
| 932 | if (!cache->available_p) |
| 933 | return UNWIND_UNAVAILABLE; |
| 934 | |
| 935 | return UNWIND_NO_REASON; |
| 936 | } |
| 937 | |
| 938 | /* Our frame ID for a stub frame is the current SP and LR. */ |
| 939 | |
| 940 | static void |
| 941 | aarch64_stub_this_id (struct frame_info *this_frame, |
| 942 | void **this_cache, struct frame_id *this_id) |
| 943 | { |
| 944 | struct aarch64_prologue_cache *cache |
| 945 | = aarch64_make_stub_cache (this_frame, this_cache); |
| 946 | |
| 947 | if (cache->available_p) |
| 948 | *this_id = frame_id_build (cache->prev_sp, cache->prev_pc); |
| 949 | else |
| 950 | *this_id = frame_id_build_unavailable_stack (cache->prev_pc); |
| 951 | } |
| 952 | |
| 953 | /* Implement the "sniffer" frame_unwind method. */ |
| 954 | |
| 955 | static int |
| 956 | aarch64_stub_unwind_sniffer (const struct frame_unwind *self, |
| 957 | struct frame_info *this_frame, |
| 958 | void **this_prologue_cache) |
| 959 | { |
| 960 | CORE_ADDR addr_in_block; |
| 961 | gdb_byte dummy[4]; |
| 962 | |
| 963 | addr_in_block = get_frame_address_in_block (this_frame); |
| 964 | if (in_plt_section (addr_in_block) |
| 965 | /* We also use the stub winder if the target memory is unreadable |
| 966 | to avoid having the prologue unwinder trying to read it. */ |
| 967 | || target_read_memory (get_frame_pc (this_frame), dummy, 4) != 0) |
| 968 | return 1; |
| 969 | |
| 970 | return 0; |
| 971 | } |
| 972 | |
| 973 | /* AArch64 stub unwinder. */ |
| 974 | struct frame_unwind aarch64_stub_unwind = |
| 975 | { |
| 976 | NORMAL_FRAME, |
| 977 | aarch64_stub_frame_unwind_stop_reason, |
| 978 | aarch64_stub_this_id, |
| 979 | aarch64_prologue_prev_register, |
| 980 | NULL, |
| 981 | aarch64_stub_unwind_sniffer |
| 982 | }; |
| 983 | |
| 984 | /* Return the frame base address of *THIS_FRAME. */ |
| 985 | |
| 986 | static CORE_ADDR |
| 987 | aarch64_normal_frame_base (struct frame_info *this_frame, void **this_cache) |
| 988 | { |
| 989 | struct aarch64_prologue_cache *cache |
| 990 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 991 | |
| 992 | return cache->prev_sp - cache->framesize; |
| 993 | } |
| 994 | |
| 995 | /* AArch64 default frame base information. */ |
| 996 | struct frame_base aarch64_normal_base = |
| 997 | { |
| 998 | &aarch64_prologue_unwind, |
| 999 | aarch64_normal_frame_base, |
| 1000 | aarch64_normal_frame_base, |
| 1001 | aarch64_normal_frame_base |
| 1002 | }; |
| 1003 | |
| 1004 | /* Assuming THIS_FRAME is a dummy, return the frame ID of that |
| 1005 | dummy frame. The frame ID's base needs to match the TOS value |
| 1006 | saved by save_dummy_frame_tos () and returned from |
| 1007 | aarch64_push_dummy_call, and the PC needs to match the dummy |
| 1008 | frame's breakpoint. */ |
| 1009 | |
| 1010 | static struct frame_id |
| 1011 | aarch64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1012 | { |
| 1013 | return frame_id_build (get_frame_register_unsigned (this_frame, |
| 1014 | AARCH64_SP_REGNUM), |
| 1015 | get_frame_pc (this_frame)); |
| 1016 | } |
| 1017 | |
| 1018 | /* Implement the "unwind_pc" gdbarch method. */ |
| 1019 | |
| 1020 | static CORE_ADDR |
| 1021 | aarch64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1022 | { |
| 1023 | CORE_ADDR pc |
| 1024 | = frame_unwind_register_unsigned (this_frame, AARCH64_PC_REGNUM); |
| 1025 | |
| 1026 | return pc; |
| 1027 | } |
| 1028 | |
| 1029 | /* Implement the "unwind_sp" gdbarch method. */ |
| 1030 | |
| 1031 | static CORE_ADDR |
| 1032 | aarch64_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1033 | { |
| 1034 | return frame_unwind_register_unsigned (this_frame, AARCH64_SP_REGNUM); |
| 1035 | } |
| 1036 | |
| 1037 | /* Return the value of the REGNUM register in the previous frame of |
| 1038 | *THIS_FRAME. */ |
| 1039 | |
| 1040 | static struct value * |
| 1041 | aarch64_dwarf2_prev_register (struct frame_info *this_frame, |
| 1042 | void **this_cache, int regnum) |
| 1043 | { |
| 1044 | CORE_ADDR lr; |
| 1045 | |
| 1046 | switch (regnum) |
| 1047 | { |
| 1048 | case AARCH64_PC_REGNUM: |
| 1049 | lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM); |
| 1050 | return frame_unwind_got_constant (this_frame, regnum, lr); |
| 1051 | |
| 1052 | default: |
| 1053 | internal_error (__FILE__, __LINE__, |
| 1054 | _("Unexpected register %d"), regnum); |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* Implement the "init_reg" dwarf2_frame_ops method. */ |
| 1059 | |
| 1060 | static void |
| 1061 | aarch64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, |
| 1062 | struct dwarf2_frame_state_reg *reg, |
| 1063 | struct frame_info *this_frame) |
| 1064 | { |
| 1065 | switch (regnum) |
| 1066 | { |
| 1067 | case AARCH64_PC_REGNUM: |
| 1068 | reg->how = DWARF2_FRAME_REG_FN; |
| 1069 | reg->loc.fn = aarch64_dwarf2_prev_register; |
| 1070 | break; |
| 1071 | case AARCH64_SP_REGNUM: |
| 1072 | reg->how = DWARF2_FRAME_REG_CFA; |
| 1073 | break; |
| 1074 | } |
| 1075 | } |
| 1076 | |
| 1077 | /* When arguments must be pushed onto the stack, they go on in reverse |
| 1078 | order. The code below implements a FILO (stack) to do this. */ |
| 1079 | |
| 1080 | typedef struct |
| 1081 | { |
| 1082 | /* Value to pass on stack. It can be NULL if this item is for stack |
| 1083 | padding. */ |
| 1084 | const gdb_byte *data; |
| 1085 | |
| 1086 | /* Size in bytes of value to pass on stack. */ |
| 1087 | int len; |
| 1088 | } stack_item_t; |
| 1089 | |
| 1090 | DEF_VEC_O (stack_item_t); |
| 1091 | |
| 1092 | /* Return the alignment (in bytes) of the given type. */ |
| 1093 | |
| 1094 | static int |
| 1095 | aarch64_type_align (struct type *t) |
| 1096 | { |
| 1097 | int n; |
| 1098 | int align; |
| 1099 | int falign; |
| 1100 | |
| 1101 | t = check_typedef (t); |
| 1102 | switch (TYPE_CODE (t)) |
| 1103 | { |
| 1104 | default: |
| 1105 | /* Should never happen. */ |
| 1106 | internal_error (__FILE__, __LINE__, _("unknown type alignment")); |
| 1107 | return 4; |
| 1108 | |
| 1109 | case TYPE_CODE_PTR: |
| 1110 | case TYPE_CODE_ENUM: |
| 1111 | case TYPE_CODE_INT: |
| 1112 | case TYPE_CODE_FLT: |
| 1113 | case TYPE_CODE_SET: |
| 1114 | case TYPE_CODE_RANGE: |
| 1115 | case TYPE_CODE_BITSTRING: |
| 1116 | case TYPE_CODE_REF: |
| 1117 | case TYPE_CODE_RVALUE_REF: |
| 1118 | case TYPE_CODE_CHAR: |
| 1119 | case TYPE_CODE_BOOL: |
| 1120 | return TYPE_LENGTH (t); |
| 1121 | |
| 1122 | case TYPE_CODE_ARRAY: |
| 1123 | if (TYPE_VECTOR (t)) |
| 1124 | { |
| 1125 | /* Use the natural alignment for vector types (the same for |
| 1126 | scalar type), but the maximum alignment is 128-bit. */ |
| 1127 | if (TYPE_LENGTH (t) > 16) |
| 1128 | return 16; |
| 1129 | else |
| 1130 | return TYPE_LENGTH (t); |
| 1131 | } |
| 1132 | else |
| 1133 | return aarch64_type_align (TYPE_TARGET_TYPE (t)); |
| 1134 | case TYPE_CODE_COMPLEX: |
| 1135 | return aarch64_type_align (TYPE_TARGET_TYPE (t)); |
| 1136 | |
| 1137 | case TYPE_CODE_STRUCT: |
| 1138 | case TYPE_CODE_UNION: |
| 1139 | align = 1; |
| 1140 | for (n = 0; n < TYPE_NFIELDS (t); n++) |
| 1141 | { |
| 1142 | falign = aarch64_type_align (TYPE_FIELD_TYPE (t, n)); |
| 1143 | if (falign > align) |
| 1144 | align = falign; |
| 1145 | } |
| 1146 | return align; |
| 1147 | } |
| 1148 | } |
| 1149 | |
| 1150 | /* Return 1 if *TY is a homogeneous floating-point aggregate or |
| 1151 | homogeneous short-vector aggregate as defined in the AAPCS64 ABI |
| 1152 | document; otherwise return 0. */ |
| 1153 | |
| 1154 | static int |
| 1155 | is_hfa_or_hva (struct type *ty) |
| 1156 | { |
| 1157 | switch (TYPE_CODE (ty)) |
| 1158 | { |
| 1159 | case TYPE_CODE_ARRAY: |
| 1160 | { |
| 1161 | struct type *target_ty = TYPE_TARGET_TYPE (ty); |
| 1162 | |
| 1163 | if (TYPE_VECTOR (ty)) |
| 1164 | return 0; |
| 1165 | |
| 1166 | if (TYPE_LENGTH (ty) <= 4 /* HFA or HVA has at most 4 members. */ |
| 1167 | && (TYPE_CODE (target_ty) == TYPE_CODE_FLT /* HFA */ |
| 1168 | || (TYPE_CODE (target_ty) == TYPE_CODE_ARRAY /* HVA */ |
| 1169 | && TYPE_VECTOR (target_ty)))) |
| 1170 | return 1; |
| 1171 | break; |
| 1172 | } |
| 1173 | |
| 1174 | case TYPE_CODE_UNION: |
| 1175 | case TYPE_CODE_STRUCT: |
| 1176 | { |
| 1177 | /* HFA or HVA has at most four members. */ |
| 1178 | if (TYPE_NFIELDS (ty) > 0 && TYPE_NFIELDS (ty) <= 4) |
| 1179 | { |
| 1180 | struct type *member0_type; |
| 1181 | |
| 1182 | member0_type = check_typedef (TYPE_FIELD_TYPE (ty, 0)); |
| 1183 | if (TYPE_CODE (member0_type) == TYPE_CODE_FLT |
| 1184 | || (TYPE_CODE (member0_type) == TYPE_CODE_ARRAY |
| 1185 | && TYPE_VECTOR (member0_type))) |
| 1186 | { |
| 1187 | int i; |
| 1188 | |
| 1189 | for (i = 0; i < TYPE_NFIELDS (ty); i++) |
| 1190 | { |
| 1191 | struct type *member1_type; |
| 1192 | |
| 1193 | member1_type = check_typedef (TYPE_FIELD_TYPE (ty, i)); |
| 1194 | if (TYPE_CODE (member0_type) != TYPE_CODE (member1_type) |
| 1195 | || (TYPE_LENGTH (member0_type) |
| 1196 | != TYPE_LENGTH (member1_type))) |
| 1197 | return 0; |
| 1198 | } |
| 1199 | return 1; |
| 1200 | } |
| 1201 | } |
| 1202 | return 0; |
| 1203 | } |
| 1204 | |
| 1205 | default: |
| 1206 | break; |
| 1207 | } |
| 1208 | |
| 1209 | return 0; |
| 1210 | } |
| 1211 | |
| 1212 | /* AArch64 function call information structure. */ |
| 1213 | struct aarch64_call_info |
| 1214 | { |
| 1215 | /* the current argument number. */ |
| 1216 | unsigned argnum; |
| 1217 | |
| 1218 | /* The next general purpose register number, equivalent to NGRN as |
| 1219 | described in the AArch64 Procedure Call Standard. */ |
| 1220 | unsigned ngrn; |
| 1221 | |
| 1222 | /* The next SIMD and floating point register number, equivalent to |
| 1223 | NSRN as described in the AArch64 Procedure Call Standard. */ |
| 1224 | unsigned nsrn; |
| 1225 | |
| 1226 | /* The next stacked argument address, equivalent to NSAA as |
| 1227 | described in the AArch64 Procedure Call Standard. */ |
| 1228 | unsigned nsaa; |
| 1229 | |
| 1230 | /* Stack item vector. */ |
| 1231 | VEC(stack_item_t) *si; |
| 1232 | }; |
| 1233 | |
| 1234 | /* Pass a value in a sequence of consecutive X registers. The caller |
| 1235 | is responsbile for ensuring sufficient registers are available. */ |
| 1236 | |
| 1237 | static void |
| 1238 | pass_in_x (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1239 | struct aarch64_call_info *info, struct type *type, |
| 1240 | struct value *arg) |
| 1241 | { |
| 1242 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1243 | int len = TYPE_LENGTH (type); |
| 1244 | enum type_code typecode = TYPE_CODE (type); |
| 1245 | int regnum = AARCH64_X0_REGNUM + info->ngrn; |
| 1246 | const bfd_byte *buf = value_contents (arg); |
| 1247 | |
| 1248 | info->argnum++; |
| 1249 | |
| 1250 | while (len > 0) |
| 1251 | { |
| 1252 | int partial_len = len < X_REGISTER_SIZE ? len : X_REGISTER_SIZE; |
| 1253 | CORE_ADDR regval = extract_unsigned_integer (buf, partial_len, |
| 1254 | byte_order); |
| 1255 | |
| 1256 | |
| 1257 | /* Adjust sub-word struct/union args when big-endian. */ |
| 1258 | if (byte_order == BFD_ENDIAN_BIG |
| 1259 | && partial_len < X_REGISTER_SIZE |
| 1260 | && (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)) |
| 1261 | regval <<= ((X_REGISTER_SIZE - partial_len) * TARGET_CHAR_BIT); |
| 1262 | |
| 1263 | if (aarch64_debug) |
| 1264 | { |
| 1265 | debug_printf ("arg %d in %s = 0x%s\n", info->argnum, |
| 1266 | gdbarch_register_name (gdbarch, regnum), |
| 1267 | phex (regval, X_REGISTER_SIZE)); |
| 1268 | } |
| 1269 | regcache_cooked_write_unsigned (regcache, regnum, regval); |
| 1270 | len -= partial_len; |
| 1271 | buf += partial_len; |
| 1272 | regnum++; |
| 1273 | } |
| 1274 | } |
| 1275 | |
| 1276 | /* Attempt to marshall a value in a V register. Return 1 if |
| 1277 | successful, or 0 if insufficient registers are available. This |
| 1278 | function, unlike the equivalent pass_in_x() function does not |
| 1279 | handle arguments spread across multiple registers. */ |
| 1280 | |
| 1281 | static int |
| 1282 | pass_in_v (struct gdbarch *gdbarch, |
| 1283 | struct regcache *regcache, |
| 1284 | struct aarch64_call_info *info, |
| 1285 | int len, const bfd_byte *buf) |
| 1286 | { |
| 1287 | if (info->nsrn < 8) |
| 1288 | { |
| 1289 | int regnum = AARCH64_V0_REGNUM + info->nsrn; |
| 1290 | gdb_byte reg[V_REGISTER_SIZE]; |
| 1291 | |
| 1292 | info->argnum++; |
| 1293 | info->nsrn++; |
| 1294 | |
| 1295 | memset (reg, 0, sizeof (reg)); |
| 1296 | /* PCS C.1, the argument is allocated to the least significant |
| 1297 | bits of V register. */ |
| 1298 | memcpy (reg, buf, len); |
| 1299 | regcache->cooked_write (regnum, reg); |
| 1300 | |
| 1301 | if (aarch64_debug) |
| 1302 | { |
| 1303 | debug_printf ("arg %d in %s\n", info->argnum, |
| 1304 | gdbarch_register_name (gdbarch, regnum)); |
| 1305 | } |
| 1306 | return 1; |
| 1307 | } |
| 1308 | info->nsrn = 8; |
| 1309 | return 0; |
| 1310 | } |
| 1311 | |
| 1312 | /* Marshall an argument onto the stack. */ |
| 1313 | |
| 1314 | static void |
| 1315 | pass_on_stack (struct aarch64_call_info *info, struct type *type, |
| 1316 | struct value *arg) |
| 1317 | { |
| 1318 | const bfd_byte *buf = value_contents (arg); |
| 1319 | int len = TYPE_LENGTH (type); |
| 1320 | int align; |
| 1321 | stack_item_t item; |
| 1322 | |
| 1323 | info->argnum++; |
| 1324 | |
| 1325 | align = aarch64_type_align (type); |
| 1326 | |
| 1327 | /* PCS C.17 Stack should be aligned to the larger of 8 bytes or the |
| 1328 | Natural alignment of the argument's type. */ |
| 1329 | align = align_up (align, 8); |
| 1330 | |
| 1331 | /* The AArch64 PCS requires at most doubleword alignment. */ |
| 1332 | if (align > 16) |
| 1333 | align = 16; |
| 1334 | |
| 1335 | if (aarch64_debug) |
| 1336 | { |
| 1337 | debug_printf ("arg %d len=%d @ sp + %d\n", info->argnum, len, |
| 1338 | info->nsaa); |
| 1339 | } |
| 1340 | |
| 1341 | item.len = len; |
| 1342 | item.data = buf; |
| 1343 | VEC_safe_push (stack_item_t, info->si, &item); |
| 1344 | |
| 1345 | info->nsaa += len; |
| 1346 | if (info->nsaa & (align - 1)) |
| 1347 | { |
| 1348 | /* Push stack alignment padding. */ |
| 1349 | int pad = align - (info->nsaa & (align - 1)); |
| 1350 | |
| 1351 | item.len = pad; |
| 1352 | item.data = NULL; |
| 1353 | |
| 1354 | VEC_safe_push (stack_item_t, info->si, &item); |
| 1355 | info->nsaa += pad; |
| 1356 | } |
| 1357 | } |
| 1358 | |
| 1359 | /* Marshall an argument into a sequence of one or more consecutive X |
| 1360 | registers or, if insufficient X registers are available then onto |
| 1361 | the stack. */ |
| 1362 | |
| 1363 | static void |
| 1364 | pass_in_x_or_stack (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1365 | struct aarch64_call_info *info, struct type *type, |
| 1366 | struct value *arg) |
| 1367 | { |
| 1368 | int len = TYPE_LENGTH (type); |
| 1369 | int nregs = (len + X_REGISTER_SIZE - 1) / X_REGISTER_SIZE; |
| 1370 | |
| 1371 | /* PCS C.13 - Pass in registers if we have enough spare */ |
| 1372 | if (info->ngrn + nregs <= 8) |
| 1373 | { |
| 1374 | pass_in_x (gdbarch, regcache, info, type, arg); |
| 1375 | info->ngrn += nregs; |
| 1376 | } |
| 1377 | else |
| 1378 | { |
| 1379 | info->ngrn = 8; |
| 1380 | pass_on_stack (info, type, arg); |
| 1381 | } |
| 1382 | } |
| 1383 | |
| 1384 | /* Pass a value in a V register, or on the stack if insufficient are |
| 1385 | available. */ |
| 1386 | |
| 1387 | static void |
| 1388 | pass_in_v_or_stack (struct gdbarch *gdbarch, |
| 1389 | struct regcache *regcache, |
| 1390 | struct aarch64_call_info *info, |
| 1391 | struct type *type, |
| 1392 | struct value *arg) |
| 1393 | { |
| 1394 | if (!pass_in_v (gdbarch, regcache, info, TYPE_LENGTH (type), |
| 1395 | value_contents (arg))) |
| 1396 | pass_on_stack (info, type, arg); |
| 1397 | } |
| 1398 | |
| 1399 | /* Implement the "push_dummy_call" gdbarch method. */ |
| 1400 | |
| 1401 | static CORE_ADDR |
| 1402 | aarch64_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
| 1403 | struct regcache *regcache, CORE_ADDR bp_addr, |
| 1404 | int nargs, |
| 1405 | struct value **args, CORE_ADDR sp, int struct_return, |
| 1406 | CORE_ADDR struct_addr) |
| 1407 | { |
| 1408 | int argnum; |
| 1409 | struct aarch64_call_info info; |
| 1410 | struct type *func_type; |
| 1411 | struct type *return_type; |
| 1412 | int lang_struct_return; |
| 1413 | |
| 1414 | memset (&info, 0, sizeof (info)); |
| 1415 | |
| 1416 | /* We need to know what the type of the called function is in order |
| 1417 | to determine the number of named/anonymous arguments for the |
| 1418 | actual argument placement, and the return type in order to handle |
| 1419 | return value correctly. |
| 1420 | |
| 1421 | The generic code above us views the decision of return in memory |
| 1422 | or return in registers as a two stage processes. The language |
| 1423 | handler is consulted first and may decide to return in memory (eg |
| 1424 | class with copy constructor returned by value), this will cause |
| 1425 | the generic code to allocate space AND insert an initial leading |
| 1426 | argument. |
| 1427 | |
| 1428 | If the language code does not decide to pass in memory then the |
| 1429 | target code is consulted. |
| 1430 | |
| 1431 | If the language code decides to pass in memory we want to move |
| 1432 | the pointer inserted as the initial argument from the argument |
| 1433 | list and into X8, the conventional AArch64 struct return pointer |
| 1434 | register. |
| 1435 | |
| 1436 | This is slightly awkward, ideally the flag "lang_struct_return" |
| 1437 | would be passed to the targets implementation of push_dummy_call. |
| 1438 | Rather that change the target interface we call the language code |
| 1439 | directly ourselves. */ |
| 1440 | |
| 1441 | func_type = check_typedef (value_type (function)); |
| 1442 | |
| 1443 | /* Dereference function pointer types. */ |
| 1444 | if (TYPE_CODE (func_type) == TYPE_CODE_PTR) |
| 1445 | func_type = TYPE_TARGET_TYPE (func_type); |
| 1446 | |
| 1447 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC |
| 1448 | || TYPE_CODE (func_type) == TYPE_CODE_METHOD); |
| 1449 | |
| 1450 | /* If language_pass_by_reference () returned true we will have been |
| 1451 | given an additional initial argument, a hidden pointer to the |
| 1452 | return slot in memory. */ |
| 1453 | return_type = TYPE_TARGET_TYPE (func_type); |
| 1454 | lang_struct_return = language_pass_by_reference (return_type); |
| 1455 | |
| 1456 | /* Set the return address. For the AArch64, the return breakpoint |
| 1457 | is always at BP_ADDR. */ |
| 1458 | regcache_cooked_write_unsigned (regcache, AARCH64_LR_REGNUM, bp_addr); |
| 1459 | |
| 1460 | /* If we were given an initial argument for the return slot because |
| 1461 | lang_struct_return was true, lose it. */ |
| 1462 | if (lang_struct_return) |
| 1463 | { |
| 1464 | args++; |
| 1465 | nargs--; |
| 1466 | } |
| 1467 | |
| 1468 | /* The struct_return pointer occupies X8. */ |
| 1469 | if (struct_return || lang_struct_return) |
| 1470 | { |
| 1471 | if (aarch64_debug) |
| 1472 | { |
| 1473 | debug_printf ("struct return in %s = 0x%s\n", |
| 1474 | gdbarch_register_name (gdbarch, |
| 1475 | AARCH64_STRUCT_RETURN_REGNUM), |
| 1476 | paddress (gdbarch, struct_addr)); |
| 1477 | } |
| 1478 | regcache_cooked_write_unsigned (regcache, AARCH64_STRUCT_RETURN_REGNUM, |
| 1479 | struct_addr); |
| 1480 | } |
| 1481 | |
| 1482 | for (argnum = 0; argnum < nargs; argnum++) |
| 1483 | { |
| 1484 | struct value *arg = args[argnum]; |
| 1485 | struct type *arg_type; |
| 1486 | int len; |
| 1487 | |
| 1488 | arg_type = check_typedef (value_type (arg)); |
| 1489 | len = TYPE_LENGTH (arg_type); |
| 1490 | |
| 1491 | switch (TYPE_CODE (arg_type)) |
| 1492 | { |
| 1493 | case TYPE_CODE_INT: |
| 1494 | case TYPE_CODE_BOOL: |
| 1495 | case TYPE_CODE_CHAR: |
| 1496 | case TYPE_CODE_RANGE: |
| 1497 | case TYPE_CODE_ENUM: |
| 1498 | if (len < 4) |
| 1499 | { |
| 1500 | /* Promote to 32 bit integer. */ |
| 1501 | if (TYPE_UNSIGNED (arg_type)) |
| 1502 | arg_type = builtin_type (gdbarch)->builtin_uint32; |
| 1503 | else |
| 1504 | arg_type = builtin_type (gdbarch)->builtin_int32; |
| 1505 | arg = value_cast (arg_type, arg); |
| 1506 | } |
| 1507 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1508 | break; |
| 1509 | |
| 1510 | case TYPE_CODE_COMPLEX: |
| 1511 | if (info.nsrn <= 6) |
| 1512 | { |
| 1513 | const bfd_byte *buf = value_contents (arg); |
| 1514 | struct type *target_type = |
| 1515 | check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| 1516 | |
| 1517 | pass_in_v (gdbarch, regcache, &info, |
| 1518 | TYPE_LENGTH (target_type), buf); |
| 1519 | pass_in_v (gdbarch, regcache, &info, |
| 1520 | TYPE_LENGTH (target_type), |
| 1521 | buf + TYPE_LENGTH (target_type)); |
| 1522 | } |
| 1523 | else |
| 1524 | { |
| 1525 | info.nsrn = 8; |
| 1526 | pass_on_stack (&info, arg_type, arg); |
| 1527 | } |
| 1528 | break; |
| 1529 | case TYPE_CODE_FLT: |
| 1530 | pass_in_v_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1531 | break; |
| 1532 | |
| 1533 | case TYPE_CODE_STRUCT: |
| 1534 | case TYPE_CODE_ARRAY: |
| 1535 | case TYPE_CODE_UNION: |
| 1536 | if (is_hfa_or_hva (arg_type)) |
| 1537 | { |
| 1538 | int elements = TYPE_NFIELDS (arg_type); |
| 1539 | |
| 1540 | /* Homogeneous Aggregates */ |
| 1541 | if (info.nsrn + elements < 8) |
| 1542 | { |
| 1543 | int i; |
| 1544 | |
| 1545 | for (i = 0; i < elements; i++) |
| 1546 | { |
| 1547 | /* We know that we have sufficient registers |
| 1548 | available therefore this will never fallback |
| 1549 | to the stack. */ |
| 1550 | struct value *field = |
| 1551 | value_primitive_field (arg, 0, i, arg_type); |
| 1552 | struct type *field_type = |
| 1553 | check_typedef (value_type (field)); |
| 1554 | |
| 1555 | pass_in_v_or_stack (gdbarch, regcache, &info, |
| 1556 | field_type, field); |
| 1557 | } |
| 1558 | } |
| 1559 | else |
| 1560 | { |
| 1561 | info.nsrn = 8; |
| 1562 | pass_on_stack (&info, arg_type, arg); |
| 1563 | } |
| 1564 | } |
| 1565 | else if (TYPE_CODE (arg_type) == TYPE_CODE_ARRAY |
| 1566 | && TYPE_VECTOR (arg_type) && (len == 16 || len == 8)) |
| 1567 | { |
| 1568 | /* Short vector types are passed in V registers. */ |
| 1569 | pass_in_v_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1570 | } |
| 1571 | else if (len > 16) |
| 1572 | { |
| 1573 | /* PCS B.7 Aggregates larger than 16 bytes are passed by |
| 1574 | invisible reference. */ |
| 1575 | |
| 1576 | /* Allocate aligned storage. */ |
| 1577 | sp = align_down (sp - len, 16); |
| 1578 | |
| 1579 | /* Write the real data into the stack. */ |
| 1580 | write_memory (sp, value_contents (arg), len); |
| 1581 | |
| 1582 | /* Construct the indirection. */ |
| 1583 | arg_type = lookup_pointer_type (arg_type); |
| 1584 | arg = value_from_pointer (arg_type, sp); |
| 1585 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1586 | } |
| 1587 | else |
| 1588 | /* PCS C.15 / C.18 multiple values pass. */ |
| 1589 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1590 | break; |
| 1591 | |
| 1592 | default: |
| 1593 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, arg); |
| 1594 | break; |
| 1595 | } |
| 1596 | } |
| 1597 | |
| 1598 | /* Make sure stack retains 16 byte alignment. */ |
| 1599 | if (info.nsaa & 15) |
| 1600 | sp -= 16 - (info.nsaa & 15); |
| 1601 | |
| 1602 | while (!VEC_empty (stack_item_t, info.si)) |
| 1603 | { |
| 1604 | stack_item_t *si = VEC_last (stack_item_t, info.si); |
| 1605 | |
| 1606 | sp -= si->len; |
| 1607 | if (si->data != NULL) |
| 1608 | write_memory (sp, si->data, si->len); |
| 1609 | VEC_pop (stack_item_t, info.si); |
| 1610 | } |
| 1611 | |
| 1612 | VEC_free (stack_item_t, info.si); |
| 1613 | |
| 1614 | /* Finally, update the SP register. */ |
| 1615 | regcache_cooked_write_unsigned (regcache, AARCH64_SP_REGNUM, sp); |
| 1616 | |
| 1617 | return sp; |
| 1618 | } |
| 1619 | |
| 1620 | /* Implement the "frame_align" gdbarch method. */ |
| 1621 | |
| 1622 | static CORE_ADDR |
| 1623 | aarch64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) |
| 1624 | { |
| 1625 | /* Align the stack to sixteen bytes. */ |
| 1626 | return sp & ~(CORE_ADDR) 15; |
| 1627 | } |
| 1628 | |
| 1629 | /* Return the type for an AdvSISD Q register. */ |
| 1630 | |
| 1631 | static struct type * |
| 1632 | aarch64_vnq_type (struct gdbarch *gdbarch) |
| 1633 | { |
| 1634 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1635 | |
| 1636 | if (tdep->vnq_type == NULL) |
| 1637 | { |
| 1638 | struct type *t; |
| 1639 | struct type *elem; |
| 1640 | |
| 1641 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnq", |
| 1642 | TYPE_CODE_UNION); |
| 1643 | |
| 1644 | elem = builtin_type (gdbarch)->builtin_uint128; |
| 1645 | append_composite_type_field (t, "u", elem); |
| 1646 | |
| 1647 | elem = builtin_type (gdbarch)->builtin_int128; |
| 1648 | append_composite_type_field (t, "s", elem); |
| 1649 | |
| 1650 | tdep->vnq_type = t; |
| 1651 | } |
| 1652 | |
| 1653 | return tdep->vnq_type; |
| 1654 | } |
| 1655 | |
| 1656 | /* Return the type for an AdvSISD D register. */ |
| 1657 | |
| 1658 | static struct type * |
| 1659 | aarch64_vnd_type (struct gdbarch *gdbarch) |
| 1660 | { |
| 1661 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1662 | |
| 1663 | if (tdep->vnd_type == NULL) |
| 1664 | { |
| 1665 | struct type *t; |
| 1666 | struct type *elem; |
| 1667 | |
| 1668 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnd", |
| 1669 | TYPE_CODE_UNION); |
| 1670 | |
| 1671 | elem = builtin_type (gdbarch)->builtin_double; |
| 1672 | append_composite_type_field (t, "f", elem); |
| 1673 | |
| 1674 | elem = builtin_type (gdbarch)->builtin_uint64; |
| 1675 | append_composite_type_field (t, "u", elem); |
| 1676 | |
| 1677 | elem = builtin_type (gdbarch)->builtin_int64; |
| 1678 | append_composite_type_field (t, "s", elem); |
| 1679 | |
| 1680 | tdep->vnd_type = t; |
| 1681 | } |
| 1682 | |
| 1683 | return tdep->vnd_type; |
| 1684 | } |
| 1685 | |
| 1686 | /* Return the type for an AdvSISD S register. */ |
| 1687 | |
| 1688 | static struct type * |
| 1689 | aarch64_vns_type (struct gdbarch *gdbarch) |
| 1690 | { |
| 1691 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1692 | |
| 1693 | if (tdep->vns_type == NULL) |
| 1694 | { |
| 1695 | struct type *t; |
| 1696 | struct type *elem; |
| 1697 | |
| 1698 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vns", |
| 1699 | TYPE_CODE_UNION); |
| 1700 | |
| 1701 | elem = builtin_type (gdbarch)->builtin_float; |
| 1702 | append_composite_type_field (t, "f", elem); |
| 1703 | |
| 1704 | elem = builtin_type (gdbarch)->builtin_uint32; |
| 1705 | append_composite_type_field (t, "u", elem); |
| 1706 | |
| 1707 | elem = builtin_type (gdbarch)->builtin_int32; |
| 1708 | append_composite_type_field (t, "s", elem); |
| 1709 | |
| 1710 | tdep->vns_type = t; |
| 1711 | } |
| 1712 | |
| 1713 | return tdep->vns_type; |
| 1714 | } |
| 1715 | |
| 1716 | /* Return the type for an AdvSISD H register. */ |
| 1717 | |
| 1718 | static struct type * |
| 1719 | aarch64_vnh_type (struct gdbarch *gdbarch) |
| 1720 | { |
| 1721 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1722 | |
| 1723 | if (tdep->vnh_type == NULL) |
| 1724 | { |
| 1725 | struct type *t; |
| 1726 | struct type *elem; |
| 1727 | |
| 1728 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnh", |
| 1729 | TYPE_CODE_UNION); |
| 1730 | |
| 1731 | elem = builtin_type (gdbarch)->builtin_uint16; |
| 1732 | append_composite_type_field (t, "u", elem); |
| 1733 | |
| 1734 | elem = builtin_type (gdbarch)->builtin_int16; |
| 1735 | append_composite_type_field (t, "s", elem); |
| 1736 | |
| 1737 | tdep->vnh_type = t; |
| 1738 | } |
| 1739 | |
| 1740 | return tdep->vnh_type; |
| 1741 | } |
| 1742 | |
| 1743 | /* Return the type for an AdvSISD B register. */ |
| 1744 | |
| 1745 | static struct type * |
| 1746 | aarch64_vnb_type (struct gdbarch *gdbarch) |
| 1747 | { |
| 1748 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1749 | |
| 1750 | if (tdep->vnb_type == NULL) |
| 1751 | { |
| 1752 | struct type *t; |
| 1753 | struct type *elem; |
| 1754 | |
| 1755 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnb", |
| 1756 | TYPE_CODE_UNION); |
| 1757 | |
| 1758 | elem = builtin_type (gdbarch)->builtin_uint8; |
| 1759 | append_composite_type_field (t, "u", elem); |
| 1760 | |
| 1761 | elem = builtin_type (gdbarch)->builtin_int8; |
| 1762 | append_composite_type_field (t, "s", elem); |
| 1763 | |
| 1764 | tdep->vnb_type = t; |
| 1765 | } |
| 1766 | |
| 1767 | return tdep->vnb_type; |
| 1768 | } |
| 1769 | |
| 1770 | /* Return the type for an AdvSISD V register. */ |
| 1771 | |
| 1772 | static struct type * |
| 1773 | aarch64_vnv_type (struct gdbarch *gdbarch) |
| 1774 | { |
| 1775 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1776 | |
| 1777 | if (tdep->vnv_type == NULL) |
| 1778 | { |
| 1779 | struct type *t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnv", |
| 1780 | TYPE_CODE_UNION); |
| 1781 | |
| 1782 | append_composite_type_field (t, "d", aarch64_vnd_type (gdbarch)); |
| 1783 | append_composite_type_field (t, "s", aarch64_vns_type (gdbarch)); |
| 1784 | append_composite_type_field (t, "h", aarch64_vnh_type (gdbarch)); |
| 1785 | append_composite_type_field (t, "b", aarch64_vnb_type (gdbarch)); |
| 1786 | append_composite_type_field (t, "q", aarch64_vnq_type (gdbarch)); |
| 1787 | |
| 1788 | tdep->vnv_type = t; |
| 1789 | } |
| 1790 | |
| 1791 | return tdep->vnv_type; |
| 1792 | } |
| 1793 | |
| 1794 | /* Implement the "dwarf2_reg_to_regnum" gdbarch method. */ |
| 1795 | |
| 1796 | static int |
| 1797 | aarch64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
| 1798 | { |
| 1799 | if (reg >= AARCH64_DWARF_X0 && reg <= AARCH64_DWARF_X0 + 30) |
| 1800 | return AARCH64_X0_REGNUM + reg - AARCH64_DWARF_X0; |
| 1801 | |
| 1802 | if (reg == AARCH64_DWARF_SP) |
| 1803 | return AARCH64_SP_REGNUM; |
| 1804 | |
| 1805 | if (reg >= AARCH64_DWARF_V0 && reg <= AARCH64_DWARF_V0 + 31) |
| 1806 | return AARCH64_V0_REGNUM + reg - AARCH64_DWARF_V0; |
| 1807 | |
| 1808 | if (reg == AARCH64_DWARF_SVE_VG) |
| 1809 | return AARCH64_SVE_VG_REGNUM; |
| 1810 | |
| 1811 | if (reg == AARCH64_DWARF_SVE_FFR) |
| 1812 | return AARCH64_SVE_FFR_REGNUM; |
| 1813 | |
| 1814 | if (reg >= AARCH64_DWARF_SVE_P0 && reg <= AARCH64_DWARF_SVE_P0 + 15) |
| 1815 | return AARCH64_SVE_P0_REGNUM + reg - AARCH64_DWARF_SVE_P0; |
| 1816 | |
| 1817 | if (reg >= AARCH64_DWARF_SVE_Z0 && reg <= AARCH64_DWARF_SVE_Z0 + 15) |
| 1818 | return AARCH64_SVE_Z0_REGNUM + reg - AARCH64_DWARF_SVE_Z0; |
| 1819 | |
| 1820 | return -1; |
| 1821 | } |
| 1822 | |
| 1823 | /* Implement the "print_insn" gdbarch method. */ |
| 1824 | |
| 1825 | static int |
| 1826 | aarch64_gdb_print_insn (bfd_vma memaddr, disassemble_info *info) |
| 1827 | { |
| 1828 | info->symbols = NULL; |
| 1829 | return default_print_insn (memaddr, info); |
| 1830 | } |
| 1831 | |
| 1832 | /* AArch64 BRK software debug mode instruction. |
| 1833 | Note that AArch64 code is always little-endian. |
| 1834 | 1101.0100.0010.0000.0000.0000.0000.0000 = 0xd4200000. */ |
| 1835 | constexpr gdb_byte aarch64_default_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; |
| 1836 | |
| 1837 | typedef BP_MANIPULATION (aarch64_default_breakpoint) aarch64_breakpoint; |
| 1838 | |
| 1839 | /* Extract from an array REGS containing the (raw) register state a |
| 1840 | function return value of type TYPE, and copy that, in virtual |
| 1841 | format, into VALBUF. */ |
| 1842 | |
| 1843 | static void |
| 1844 | aarch64_extract_return_value (struct type *type, struct regcache *regs, |
| 1845 | gdb_byte *valbuf) |
| 1846 | { |
| 1847 | struct gdbarch *gdbarch = regs->arch (); |
| 1848 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1849 | |
| 1850 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1851 | { |
| 1852 | bfd_byte buf[V_REGISTER_SIZE]; |
| 1853 | int len = TYPE_LENGTH (type); |
| 1854 | |
| 1855 | regs->cooked_read (AARCH64_V0_REGNUM, buf); |
| 1856 | memcpy (valbuf, buf, len); |
| 1857 | } |
| 1858 | else if (TYPE_CODE (type) == TYPE_CODE_INT |
| 1859 | || TYPE_CODE (type) == TYPE_CODE_CHAR |
| 1860 | || TYPE_CODE (type) == TYPE_CODE_BOOL |
| 1861 | || TYPE_CODE (type) == TYPE_CODE_PTR |
| 1862 | || TYPE_IS_REFERENCE (type) |
| 1863 | || TYPE_CODE (type) == TYPE_CODE_ENUM) |
| 1864 | { |
| 1865 | /* If the the type is a plain integer, then the access is |
| 1866 | straight-forward. Otherwise we have to play around a bit |
| 1867 | more. */ |
| 1868 | int len = TYPE_LENGTH (type); |
| 1869 | int regno = AARCH64_X0_REGNUM; |
| 1870 | ULONGEST tmp; |
| 1871 | |
| 1872 | while (len > 0) |
| 1873 | { |
| 1874 | /* By using store_unsigned_integer we avoid having to do |
| 1875 | anything special for small big-endian values. */ |
| 1876 | regcache_cooked_read_unsigned (regs, regno++, &tmp); |
| 1877 | store_unsigned_integer (valbuf, |
| 1878 | (len > X_REGISTER_SIZE |
| 1879 | ? X_REGISTER_SIZE : len), byte_order, tmp); |
| 1880 | len -= X_REGISTER_SIZE; |
| 1881 | valbuf += X_REGISTER_SIZE; |
| 1882 | } |
| 1883 | } |
| 1884 | else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX) |
| 1885 | { |
| 1886 | int regno = AARCH64_V0_REGNUM; |
| 1887 | bfd_byte buf[V_REGISTER_SIZE]; |
| 1888 | struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type)); |
| 1889 | int len = TYPE_LENGTH (target_type); |
| 1890 | |
| 1891 | regs->cooked_read (regno, buf); |
| 1892 | memcpy (valbuf, buf, len); |
| 1893 | valbuf += len; |
| 1894 | regs->cooked_read (regno + 1, buf); |
| 1895 | memcpy (valbuf, buf, len); |
| 1896 | valbuf += len; |
| 1897 | } |
| 1898 | else if (is_hfa_or_hva (type)) |
| 1899 | { |
| 1900 | int elements = TYPE_NFIELDS (type); |
| 1901 | struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 1902 | int len = TYPE_LENGTH (member_type); |
| 1903 | int i; |
| 1904 | |
| 1905 | for (i = 0; i < elements; i++) |
| 1906 | { |
| 1907 | int regno = AARCH64_V0_REGNUM + i; |
| 1908 | bfd_byte buf[V_REGISTER_SIZE]; |
| 1909 | |
| 1910 | if (aarch64_debug) |
| 1911 | { |
| 1912 | debug_printf ("read HFA or HVA return value element %d from %s\n", |
| 1913 | i + 1, |
| 1914 | gdbarch_register_name (gdbarch, regno)); |
| 1915 | } |
| 1916 | regs->cooked_read (regno, buf); |
| 1917 | |
| 1918 | memcpy (valbuf, buf, len); |
| 1919 | valbuf += len; |
| 1920 | } |
| 1921 | } |
| 1922 | else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type) |
| 1923 | && (TYPE_LENGTH (type) == 16 || TYPE_LENGTH (type) == 8)) |
| 1924 | { |
| 1925 | /* Short vector is returned in V register. */ |
| 1926 | gdb_byte buf[V_REGISTER_SIZE]; |
| 1927 | |
| 1928 | regs->cooked_read (AARCH64_V0_REGNUM, buf); |
| 1929 | memcpy (valbuf, buf, TYPE_LENGTH (type)); |
| 1930 | } |
| 1931 | else |
| 1932 | { |
| 1933 | /* For a structure or union the behaviour is as if the value had |
| 1934 | been stored to word-aligned memory and then loaded into |
| 1935 | registers with 64-bit load instruction(s). */ |
| 1936 | int len = TYPE_LENGTH (type); |
| 1937 | int regno = AARCH64_X0_REGNUM; |
| 1938 | bfd_byte buf[X_REGISTER_SIZE]; |
| 1939 | |
| 1940 | while (len > 0) |
| 1941 | { |
| 1942 | regs->cooked_read (regno++, buf); |
| 1943 | memcpy (valbuf, buf, len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len); |
| 1944 | len -= X_REGISTER_SIZE; |
| 1945 | valbuf += X_REGISTER_SIZE; |
| 1946 | } |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | |
| 1951 | /* Will a function return an aggregate type in memory or in a |
| 1952 | register? Return 0 if an aggregate type can be returned in a |
| 1953 | register, 1 if it must be returned in memory. */ |
| 1954 | |
| 1955 | static int |
| 1956 | aarch64_return_in_memory (struct gdbarch *gdbarch, struct type *type) |
| 1957 | { |
| 1958 | type = check_typedef (type); |
| 1959 | |
| 1960 | if (is_hfa_or_hva (type)) |
| 1961 | { |
| 1962 | /* v0-v7 are used to return values and one register is allocated |
| 1963 | for one member. However, HFA or HVA has at most four members. */ |
| 1964 | return 0; |
| 1965 | } |
| 1966 | |
| 1967 | if (TYPE_LENGTH (type) > 16) |
| 1968 | { |
| 1969 | /* PCS B.6 Aggregates larger than 16 bytes are passed by |
| 1970 | invisible reference. */ |
| 1971 | |
| 1972 | return 1; |
| 1973 | } |
| 1974 | |
| 1975 | return 0; |
| 1976 | } |
| 1977 | |
| 1978 | /* Write into appropriate registers a function return value of type |
| 1979 | TYPE, given in virtual format. */ |
| 1980 | |
| 1981 | static void |
| 1982 | aarch64_store_return_value (struct type *type, struct regcache *regs, |
| 1983 | const gdb_byte *valbuf) |
| 1984 | { |
| 1985 | struct gdbarch *gdbarch = regs->arch (); |
| 1986 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1987 | |
| 1988 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 1989 | { |
| 1990 | bfd_byte buf[V_REGISTER_SIZE]; |
| 1991 | int len = TYPE_LENGTH (type); |
| 1992 | |
| 1993 | memcpy (buf, valbuf, len > V_REGISTER_SIZE ? V_REGISTER_SIZE : len); |
| 1994 | regs->cooked_write (AARCH64_V0_REGNUM, buf); |
| 1995 | } |
| 1996 | else if (TYPE_CODE (type) == TYPE_CODE_INT |
| 1997 | || TYPE_CODE (type) == TYPE_CODE_CHAR |
| 1998 | || TYPE_CODE (type) == TYPE_CODE_BOOL |
| 1999 | || TYPE_CODE (type) == TYPE_CODE_PTR |
| 2000 | || TYPE_IS_REFERENCE (type) |
| 2001 | || TYPE_CODE (type) == TYPE_CODE_ENUM) |
| 2002 | { |
| 2003 | if (TYPE_LENGTH (type) <= X_REGISTER_SIZE) |
| 2004 | { |
| 2005 | /* Values of one word or less are zero/sign-extended and |
| 2006 | returned in r0. */ |
| 2007 | bfd_byte tmpbuf[X_REGISTER_SIZE]; |
| 2008 | LONGEST val = unpack_long (type, valbuf); |
| 2009 | |
| 2010 | store_signed_integer (tmpbuf, X_REGISTER_SIZE, byte_order, val); |
| 2011 | regs->cooked_write (AARCH64_X0_REGNUM, tmpbuf); |
| 2012 | } |
| 2013 | else |
| 2014 | { |
| 2015 | /* Integral values greater than one word are stored in |
| 2016 | consecutive registers starting with r0. This will always |
| 2017 | be a multiple of the regiser size. */ |
| 2018 | int len = TYPE_LENGTH (type); |
| 2019 | int regno = AARCH64_X0_REGNUM; |
| 2020 | |
| 2021 | while (len > 0) |
| 2022 | { |
| 2023 | regs->cooked_write (regno++, valbuf); |
| 2024 | len -= X_REGISTER_SIZE; |
| 2025 | valbuf += X_REGISTER_SIZE; |
| 2026 | } |
| 2027 | } |
| 2028 | } |
| 2029 | else if (is_hfa_or_hva (type)) |
| 2030 | { |
| 2031 | int elements = TYPE_NFIELDS (type); |
| 2032 | struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 2033 | int len = TYPE_LENGTH (member_type); |
| 2034 | int i; |
| 2035 | |
| 2036 | for (i = 0; i < elements; i++) |
| 2037 | { |
| 2038 | int regno = AARCH64_V0_REGNUM + i; |
| 2039 | bfd_byte tmpbuf[V_REGISTER_SIZE]; |
| 2040 | |
| 2041 | if (aarch64_debug) |
| 2042 | { |
| 2043 | debug_printf ("write HFA or HVA return value element %d to %s\n", |
| 2044 | i + 1, |
| 2045 | gdbarch_register_name (gdbarch, regno)); |
| 2046 | } |
| 2047 | |
| 2048 | memcpy (tmpbuf, valbuf, len); |
| 2049 | regs->cooked_write (regno, tmpbuf); |
| 2050 | valbuf += len; |
| 2051 | } |
| 2052 | } |
| 2053 | else if (TYPE_CODE (type) == TYPE_CODE_ARRAY && TYPE_VECTOR (type) |
| 2054 | && (TYPE_LENGTH (type) == 8 || TYPE_LENGTH (type) == 16)) |
| 2055 | { |
| 2056 | /* Short vector. */ |
| 2057 | gdb_byte buf[V_REGISTER_SIZE]; |
| 2058 | |
| 2059 | memcpy (buf, valbuf, TYPE_LENGTH (type)); |
| 2060 | regs->cooked_write (AARCH64_V0_REGNUM, buf); |
| 2061 | } |
| 2062 | else |
| 2063 | { |
| 2064 | /* For a structure or union the behaviour is as if the value had |
| 2065 | been stored to word-aligned memory and then loaded into |
| 2066 | registers with 64-bit load instruction(s). */ |
| 2067 | int len = TYPE_LENGTH (type); |
| 2068 | int regno = AARCH64_X0_REGNUM; |
| 2069 | bfd_byte tmpbuf[X_REGISTER_SIZE]; |
| 2070 | |
| 2071 | while (len > 0) |
| 2072 | { |
| 2073 | memcpy (tmpbuf, valbuf, |
| 2074 | len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len); |
| 2075 | regs->cooked_write (regno++, tmpbuf); |
| 2076 | len -= X_REGISTER_SIZE; |
| 2077 | valbuf += X_REGISTER_SIZE; |
| 2078 | } |
| 2079 | } |
| 2080 | } |
| 2081 | |
| 2082 | /* Implement the "return_value" gdbarch method. */ |
| 2083 | |
| 2084 | static enum return_value_convention |
| 2085 | aarch64_return_value (struct gdbarch *gdbarch, struct value *func_value, |
| 2086 | struct type *valtype, struct regcache *regcache, |
| 2087 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 2088 | { |
| 2089 | |
| 2090 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
| 2091 | || TYPE_CODE (valtype) == TYPE_CODE_UNION |
| 2092 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) |
| 2093 | { |
| 2094 | if (aarch64_return_in_memory (gdbarch, valtype)) |
| 2095 | { |
| 2096 | if (aarch64_debug) |
| 2097 | debug_printf ("return value in memory\n"); |
| 2098 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 2099 | } |
| 2100 | } |
| 2101 | |
| 2102 | if (writebuf) |
| 2103 | aarch64_store_return_value (valtype, regcache, writebuf); |
| 2104 | |
| 2105 | if (readbuf) |
| 2106 | aarch64_extract_return_value (valtype, regcache, readbuf); |
| 2107 | |
| 2108 | if (aarch64_debug) |
| 2109 | debug_printf ("return value in registers\n"); |
| 2110 | |
| 2111 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 2112 | } |
| 2113 | |
| 2114 | /* Implement the "get_longjmp_target" gdbarch method. */ |
| 2115 | |
| 2116 | static int |
| 2117 | aarch64_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc) |
| 2118 | { |
| 2119 | CORE_ADDR jb_addr; |
| 2120 | gdb_byte buf[X_REGISTER_SIZE]; |
| 2121 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 2122 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2123 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2124 | |
| 2125 | jb_addr = get_frame_register_unsigned (frame, AARCH64_X0_REGNUM); |
| 2126 | |
| 2127 | if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf, |
| 2128 | X_REGISTER_SIZE)) |
| 2129 | return 0; |
| 2130 | |
| 2131 | *pc = extract_unsigned_integer (buf, X_REGISTER_SIZE, byte_order); |
| 2132 | return 1; |
| 2133 | } |
| 2134 | |
| 2135 | /* Implement the "gen_return_address" gdbarch method. */ |
| 2136 | |
| 2137 | static void |
| 2138 | aarch64_gen_return_address (struct gdbarch *gdbarch, |
| 2139 | struct agent_expr *ax, struct axs_value *value, |
| 2140 | CORE_ADDR scope) |
| 2141 | { |
| 2142 | value->type = register_type (gdbarch, AARCH64_LR_REGNUM); |
| 2143 | value->kind = axs_lvalue_register; |
| 2144 | value->u.reg = AARCH64_LR_REGNUM; |
| 2145 | } |
| 2146 | \f |
| 2147 | |
| 2148 | /* Return the pseudo register name corresponding to register regnum. */ |
| 2149 | |
| 2150 | static const char * |
| 2151 | aarch64_pseudo_register_name (struct gdbarch *gdbarch, int regnum) |
| 2152 | { |
| 2153 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2154 | |
| 2155 | static const char *const q_name[] = |
| 2156 | { |
| 2157 | "q0", "q1", "q2", "q3", |
| 2158 | "q4", "q5", "q6", "q7", |
| 2159 | "q8", "q9", "q10", "q11", |
| 2160 | "q12", "q13", "q14", "q15", |
| 2161 | "q16", "q17", "q18", "q19", |
| 2162 | "q20", "q21", "q22", "q23", |
| 2163 | "q24", "q25", "q26", "q27", |
| 2164 | "q28", "q29", "q30", "q31", |
| 2165 | }; |
| 2166 | |
| 2167 | static const char *const d_name[] = |
| 2168 | { |
| 2169 | "d0", "d1", "d2", "d3", |
| 2170 | "d4", "d5", "d6", "d7", |
| 2171 | "d8", "d9", "d10", "d11", |
| 2172 | "d12", "d13", "d14", "d15", |
| 2173 | "d16", "d17", "d18", "d19", |
| 2174 | "d20", "d21", "d22", "d23", |
| 2175 | "d24", "d25", "d26", "d27", |
| 2176 | "d28", "d29", "d30", "d31", |
| 2177 | }; |
| 2178 | |
| 2179 | static const char *const s_name[] = |
| 2180 | { |
| 2181 | "s0", "s1", "s2", "s3", |
| 2182 | "s4", "s5", "s6", "s7", |
| 2183 | "s8", "s9", "s10", "s11", |
| 2184 | "s12", "s13", "s14", "s15", |
| 2185 | "s16", "s17", "s18", "s19", |
| 2186 | "s20", "s21", "s22", "s23", |
| 2187 | "s24", "s25", "s26", "s27", |
| 2188 | "s28", "s29", "s30", "s31", |
| 2189 | }; |
| 2190 | |
| 2191 | static const char *const h_name[] = |
| 2192 | { |
| 2193 | "h0", "h1", "h2", "h3", |
| 2194 | "h4", "h5", "h6", "h7", |
| 2195 | "h8", "h9", "h10", "h11", |
| 2196 | "h12", "h13", "h14", "h15", |
| 2197 | "h16", "h17", "h18", "h19", |
| 2198 | "h20", "h21", "h22", "h23", |
| 2199 | "h24", "h25", "h26", "h27", |
| 2200 | "h28", "h29", "h30", "h31", |
| 2201 | }; |
| 2202 | |
| 2203 | static const char *const b_name[] = |
| 2204 | { |
| 2205 | "b0", "b1", "b2", "b3", |
| 2206 | "b4", "b5", "b6", "b7", |
| 2207 | "b8", "b9", "b10", "b11", |
| 2208 | "b12", "b13", "b14", "b15", |
| 2209 | "b16", "b17", "b18", "b19", |
| 2210 | "b20", "b21", "b22", "b23", |
| 2211 | "b24", "b25", "b26", "b27", |
| 2212 | "b28", "b29", "b30", "b31", |
| 2213 | }; |
| 2214 | |
| 2215 | regnum -= gdbarch_num_regs (gdbarch); |
| 2216 | |
| 2217 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2218 | return q_name[regnum - AARCH64_Q0_REGNUM]; |
| 2219 | |
| 2220 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2221 | return d_name[regnum - AARCH64_D0_REGNUM]; |
| 2222 | |
| 2223 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2224 | return s_name[regnum - AARCH64_S0_REGNUM]; |
| 2225 | |
| 2226 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2227 | return h_name[regnum - AARCH64_H0_REGNUM]; |
| 2228 | |
| 2229 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2230 | return b_name[regnum - AARCH64_B0_REGNUM]; |
| 2231 | |
| 2232 | if (tdep->has_sve ()) |
| 2233 | { |
| 2234 | static const char *const sve_v_name[] = |
| 2235 | { |
| 2236 | "v0", "v1", "v2", "v3", |
| 2237 | "v4", "v5", "v6", "v7", |
| 2238 | "v8", "v9", "v10", "v11", |
| 2239 | "v12", "v13", "v14", "v15", |
| 2240 | "v16", "v17", "v18", "v19", |
| 2241 | "v20", "v21", "v22", "v23", |
| 2242 | "v24", "v25", "v26", "v27", |
| 2243 | "v28", "v29", "v30", "v31", |
| 2244 | }; |
| 2245 | |
| 2246 | if (regnum >= AARCH64_SVE_V0_REGNUM |
| 2247 | && regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM) |
| 2248 | return sve_v_name[regnum - AARCH64_SVE_V0_REGNUM]; |
| 2249 | } |
| 2250 | |
| 2251 | internal_error (__FILE__, __LINE__, |
| 2252 | _("aarch64_pseudo_register_name: bad register number %d"), |
| 2253 | regnum); |
| 2254 | } |
| 2255 | |
| 2256 | /* Implement the "pseudo_register_type" tdesc_arch_data method. */ |
| 2257 | |
| 2258 | static struct type * |
| 2259 | aarch64_pseudo_register_type (struct gdbarch *gdbarch, int regnum) |
| 2260 | { |
| 2261 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2262 | |
| 2263 | regnum -= gdbarch_num_regs (gdbarch); |
| 2264 | |
| 2265 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2266 | return aarch64_vnq_type (gdbarch); |
| 2267 | |
| 2268 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2269 | return aarch64_vnd_type (gdbarch); |
| 2270 | |
| 2271 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2272 | return aarch64_vns_type (gdbarch); |
| 2273 | |
| 2274 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2275 | return aarch64_vnh_type (gdbarch); |
| 2276 | |
| 2277 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2278 | return aarch64_vnb_type (gdbarch); |
| 2279 | |
| 2280 | if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM |
| 2281 | && regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM) |
| 2282 | return aarch64_vnv_type (gdbarch); |
| 2283 | |
| 2284 | internal_error (__FILE__, __LINE__, |
| 2285 | _("aarch64_pseudo_register_type: bad register number %d"), |
| 2286 | regnum); |
| 2287 | } |
| 2288 | |
| 2289 | /* Implement the "pseudo_register_reggroup_p" tdesc_arch_data method. */ |
| 2290 | |
| 2291 | static int |
| 2292 | aarch64_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
| 2293 | struct reggroup *group) |
| 2294 | { |
| 2295 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2296 | |
| 2297 | regnum -= gdbarch_num_regs (gdbarch); |
| 2298 | |
| 2299 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2300 | return group == all_reggroup || group == vector_reggroup; |
| 2301 | else if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2302 | return (group == all_reggroup || group == vector_reggroup |
| 2303 | || group == float_reggroup); |
| 2304 | else if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2305 | return (group == all_reggroup || group == vector_reggroup |
| 2306 | || group == float_reggroup); |
| 2307 | else if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2308 | return group == all_reggroup || group == vector_reggroup; |
| 2309 | else if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2310 | return group == all_reggroup || group == vector_reggroup; |
| 2311 | else if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM |
| 2312 | && regnum < AARCH64_SVE_V0_REGNUM + AARCH64_V_REGS_NUM) |
| 2313 | return group == all_reggroup || group == vector_reggroup; |
| 2314 | |
| 2315 | return group == all_reggroup; |
| 2316 | } |
| 2317 | |
| 2318 | /* Helper for aarch64_pseudo_read_value. */ |
| 2319 | |
| 2320 | static struct value * |
| 2321 | aarch64_pseudo_read_value_1 (struct gdbarch *gdbarch, |
| 2322 | readable_regcache *regcache, int regnum_offset, |
| 2323 | int regsize, struct value *result_value) |
| 2324 | { |
| 2325 | unsigned v_regnum = AARCH64_V0_REGNUM + regnum_offset; |
| 2326 | |
| 2327 | /* Enough space for a full vector register. */ |
| 2328 | gdb_byte reg_buf[register_size (gdbarch, AARCH64_V0_REGNUM)]; |
| 2329 | gdb_static_assert (AARCH64_V0_REGNUM == AARCH64_SVE_Z0_REGNUM); |
| 2330 | |
| 2331 | if (regcache->raw_read (v_regnum, reg_buf) != REG_VALID) |
| 2332 | mark_value_bytes_unavailable (result_value, 0, |
| 2333 | TYPE_LENGTH (value_type (result_value))); |
| 2334 | else |
| 2335 | memcpy (value_contents_raw (result_value), reg_buf, regsize); |
| 2336 | |
| 2337 | return result_value; |
| 2338 | } |
| 2339 | |
| 2340 | /* Implement the "pseudo_register_read_value" gdbarch method. */ |
| 2341 | |
| 2342 | static struct value * |
| 2343 | aarch64_pseudo_read_value (struct gdbarch *gdbarch, readable_regcache *regcache, |
| 2344 | int regnum) |
| 2345 | { |
| 2346 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2347 | struct value *result_value = allocate_value (register_type (gdbarch, regnum)); |
| 2348 | |
| 2349 | VALUE_LVAL (result_value) = lval_register; |
| 2350 | VALUE_REGNUM (result_value) = regnum; |
| 2351 | |
| 2352 | regnum -= gdbarch_num_regs (gdbarch); |
| 2353 | |
| 2354 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2355 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2356 | regnum - AARCH64_Q0_REGNUM, |
| 2357 | Q_REGISTER_SIZE, result_value); |
| 2358 | |
| 2359 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2360 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2361 | regnum - AARCH64_D0_REGNUM, |
| 2362 | D_REGISTER_SIZE, result_value); |
| 2363 | |
| 2364 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2365 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2366 | regnum - AARCH64_S0_REGNUM, |
| 2367 | S_REGISTER_SIZE, result_value); |
| 2368 | |
| 2369 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2370 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2371 | regnum - AARCH64_H0_REGNUM, |
| 2372 | H_REGISTER_SIZE, result_value); |
| 2373 | |
| 2374 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2375 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2376 | regnum - AARCH64_B0_REGNUM, |
| 2377 | B_REGISTER_SIZE, result_value); |
| 2378 | |
| 2379 | if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM |
| 2380 | && regnum < AARCH64_SVE_V0_REGNUM + 32) |
| 2381 | return aarch64_pseudo_read_value_1 (gdbarch, regcache, |
| 2382 | regnum - AARCH64_SVE_V0_REGNUM, |
| 2383 | V_REGISTER_SIZE, result_value); |
| 2384 | |
| 2385 | gdb_assert_not_reached ("regnum out of bound"); |
| 2386 | } |
| 2387 | |
| 2388 | /* Helper for aarch64_pseudo_write. */ |
| 2389 | |
| 2390 | static void |
| 2391 | aarch64_pseudo_write_1 (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2392 | int regnum_offset, int regsize, const gdb_byte *buf) |
| 2393 | { |
| 2394 | unsigned v_regnum = AARCH64_V0_REGNUM + regnum_offset; |
| 2395 | |
| 2396 | /* Enough space for a full vector register. */ |
| 2397 | gdb_byte reg_buf[register_size (gdbarch, AARCH64_V0_REGNUM)]; |
| 2398 | gdb_static_assert (AARCH64_V0_REGNUM == AARCH64_SVE_Z0_REGNUM); |
| 2399 | |
| 2400 | /* Ensure the register buffer is zero, we want gdb writes of the |
| 2401 | various 'scalar' pseudo registers to behavior like architectural |
| 2402 | writes, register width bytes are written the remainder are set to |
| 2403 | zero. */ |
| 2404 | memset (reg_buf, 0, register_size (gdbarch, AARCH64_V0_REGNUM)); |
| 2405 | |
| 2406 | memcpy (reg_buf, buf, regsize); |
| 2407 | regcache->raw_write (v_regnum, reg_buf); |
| 2408 | } |
| 2409 | |
| 2410 | /* Implement the "pseudo_register_write" gdbarch method. */ |
| 2411 | |
| 2412 | static void |
| 2413 | aarch64_pseudo_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2414 | int regnum, const gdb_byte *buf) |
| 2415 | { |
| 2416 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2417 | regnum -= gdbarch_num_regs (gdbarch); |
| 2418 | |
| 2419 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2420 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2421 | regnum - AARCH64_Q0_REGNUM, Q_REGISTER_SIZE, |
| 2422 | buf); |
| 2423 | |
| 2424 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2425 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2426 | regnum - AARCH64_D0_REGNUM, D_REGISTER_SIZE, |
| 2427 | buf); |
| 2428 | |
| 2429 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2430 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2431 | regnum - AARCH64_S0_REGNUM, S_REGISTER_SIZE, |
| 2432 | buf); |
| 2433 | |
| 2434 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2435 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2436 | regnum - AARCH64_H0_REGNUM, H_REGISTER_SIZE, |
| 2437 | buf); |
| 2438 | |
| 2439 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2440 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2441 | regnum - AARCH64_B0_REGNUM, B_REGISTER_SIZE, |
| 2442 | buf); |
| 2443 | |
| 2444 | if (tdep->has_sve () && regnum >= AARCH64_SVE_V0_REGNUM |
| 2445 | && regnum < AARCH64_SVE_V0_REGNUM + 32) |
| 2446 | return aarch64_pseudo_write_1 (gdbarch, regcache, |
| 2447 | regnum - AARCH64_SVE_V0_REGNUM, |
| 2448 | V_REGISTER_SIZE, buf); |
| 2449 | |
| 2450 | gdb_assert_not_reached ("regnum out of bound"); |
| 2451 | } |
| 2452 | |
| 2453 | /* Callback function for user_reg_add. */ |
| 2454 | |
| 2455 | static struct value * |
| 2456 | value_of_aarch64_user_reg (struct frame_info *frame, const void *baton) |
| 2457 | { |
| 2458 | const int *reg_p = (const int *) baton; |
| 2459 | |
| 2460 | return value_of_register (*reg_p, frame); |
| 2461 | } |
| 2462 | \f |
| 2463 | |
| 2464 | /* Implement the "software_single_step" gdbarch method, needed to |
| 2465 | single step through atomic sequences on AArch64. */ |
| 2466 | |
| 2467 | static std::vector<CORE_ADDR> |
| 2468 | aarch64_software_single_step (struct regcache *regcache) |
| 2469 | { |
| 2470 | struct gdbarch *gdbarch = regcache->arch (); |
| 2471 | enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch); |
| 2472 | const int insn_size = 4; |
| 2473 | const int atomic_sequence_length = 16; /* Instruction sequence length. */ |
| 2474 | CORE_ADDR pc = regcache_read_pc (regcache); |
| 2475 | CORE_ADDR breaks[2] = { -1, -1 }; |
| 2476 | CORE_ADDR loc = pc; |
| 2477 | CORE_ADDR closing_insn = 0; |
| 2478 | uint32_t insn = read_memory_unsigned_integer (loc, insn_size, |
| 2479 | byte_order_for_code); |
| 2480 | int index; |
| 2481 | int insn_count; |
| 2482 | int bc_insn_count = 0; /* Conditional branch instruction count. */ |
| 2483 | int last_breakpoint = 0; /* Defaults to 0 (no breakpoints placed). */ |
| 2484 | aarch64_inst inst; |
| 2485 | |
| 2486 | if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0) |
| 2487 | return {}; |
| 2488 | |
| 2489 | /* Look for a Load Exclusive instruction which begins the sequence. */ |
| 2490 | if (inst.opcode->iclass != ldstexcl || bit (insn, 22) == 0) |
| 2491 | return {}; |
| 2492 | |
| 2493 | for (insn_count = 0; insn_count < atomic_sequence_length; ++insn_count) |
| 2494 | { |
| 2495 | loc += insn_size; |
| 2496 | insn = read_memory_unsigned_integer (loc, insn_size, |
| 2497 | byte_order_for_code); |
| 2498 | |
| 2499 | if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0) |
| 2500 | return {}; |
| 2501 | /* Check if the instruction is a conditional branch. */ |
| 2502 | if (inst.opcode->iclass == condbranch) |
| 2503 | { |
| 2504 | gdb_assert (inst.operands[0].type == AARCH64_OPND_ADDR_PCREL19); |
| 2505 | |
| 2506 | if (bc_insn_count >= 1) |
| 2507 | return {}; |
| 2508 | |
| 2509 | /* It is, so we'll try to set a breakpoint at the destination. */ |
| 2510 | breaks[1] = loc + inst.operands[0].imm.value; |
| 2511 | |
| 2512 | bc_insn_count++; |
| 2513 | last_breakpoint++; |
| 2514 | } |
| 2515 | |
| 2516 | /* Look for the Store Exclusive which closes the atomic sequence. */ |
| 2517 | if (inst.opcode->iclass == ldstexcl && bit (insn, 22) == 0) |
| 2518 | { |
| 2519 | closing_insn = loc; |
| 2520 | break; |
| 2521 | } |
| 2522 | } |
| 2523 | |
| 2524 | /* We didn't find a closing Store Exclusive instruction, fall back. */ |
| 2525 | if (!closing_insn) |
| 2526 | return {}; |
| 2527 | |
| 2528 | /* Insert breakpoint after the end of the atomic sequence. */ |
| 2529 | breaks[0] = loc + insn_size; |
| 2530 | |
| 2531 | /* Check for duplicated breakpoints, and also check that the second |
| 2532 | breakpoint is not within the atomic sequence. */ |
| 2533 | if (last_breakpoint |
| 2534 | && (breaks[1] == breaks[0] |
| 2535 | || (breaks[1] >= pc && breaks[1] <= closing_insn))) |
| 2536 | last_breakpoint = 0; |
| 2537 | |
| 2538 | std::vector<CORE_ADDR> next_pcs; |
| 2539 | |
| 2540 | /* Insert the breakpoint at the end of the sequence, and one at the |
| 2541 | destination of the conditional branch, if it exists. */ |
| 2542 | for (index = 0; index <= last_breakpoint; index++) |
| 2543 | next_pcs.push_back (breaks[index]); |
| 2544 | |
| 2545 | return next_pcs; |
| 2546 | } |
| 2547 | |
| 2548 | struct aarch64_displaced_step_closure : public displaced_step_closure |
| 2549 | { |
| 2550 | /* It is true when condition instruction, such as B.CON, TBZ, etc, |
| 2551 | is being displaced stepping. */ |
| 2552 | int cond = 0; |
| 2553 | |
| 2554 | /* PC adjustment offset after displaced stepping. */ |
| 2555 | int32_t pc_adjust = 0; |
| 2556 | }; |
| 2557 | |
| 2558 | /* Data when visiting instructions for displaced stepping. */ |
| 2559 | |
| 2560 | struct aarch64_displaced_step_data |
| 2561 | { |
| 2562 | struct aarch64_insn_data base; |
| 2563 | |
| 2564 | /* The address where the instruction will be executed at. */ |
| 2565 | CORE_ADDR new_addr; |
| 2566 | /* Buffer of instructions to be copied to NEW_ADDR to execute. */ |
| 2567 | uint32_t insn_buf[DISPLACED_MODIFIED_INSNS]; |
| 2568 | /* Number of instructions in INSN_BUF. */ |
| 2569 | unsigned insn_count; |
| 2570 | /* Registers when doing displaced stepping. */ |
| 2571 | struct regcache *regs; |
| 2572 | |
| 2573 | aarch64_displaced_step_closure *dsc; |
| 2574 | }; |
| 2575 | |
| 2576 | /* Implementation of aarch64_insn_visitor method "b". */ |
| 2577 | |
| 2578 | static void |
| 2579 | aarch64_displaced_step_b (const int is_bl, const int32_t offset, |
| 2580 | struct aarch64_insn_data *data) |
| 2581 | { |
| 2582 | struct aarch64_displaced_step_data *dsd |
| 2583 | = (struct aarch64_displaced_step_data *) data; |
| 2584 | int64_t new_offset = data->insn_addr - dsd->new_addr + offset; |
| 2585 | |
| 2586 | if (can_encode_int32 (new_offset, 28)) |
| 2587 | { |
| 2588 | /* Emit B rather than BL, because executing BL on a new address |
| 2589 | will get the wrong address into LR. In order to avoid this, |
| 2590 | we emit B, and update LR if the instruction is BL. */ |
| 2591 | emit_b (dsd->insn_buf, 0, new_offset); |
| 2592 | dsd->insn_count++; |
| 2593 | } |
| 2594 | else |
| 2595 | { |
| 2596 | /* Write NOP. */ |
| 2597 | emit_nop (dsd->insn_buf); |
| 2598 | dsd->insn_count++; |
| 2599 | dsd->dsc->pc_adjust = offset; |
| 2600 | } |
| 2601 | |
| 2602 | if (is_bl) |
| 2603 | { |
| 2604 | /* Update LR. */ |
| 2605 | regcache_cooked_write_unsigned (dsd->regs, AARCH64_LR_REGNUM, |
| 2606 | data->insn_addr + 4); |
| 2607 | } |
| 2608 | } |
| 2609 | |
| 2610 | /* Implementation of aarch64_insn_visitor method "b_cond". */ |
| 2611 | |
| 2612 | static void |
| 2613 | aarch64_displaced_step_b_cond (const unsigned cond, const int32_t offset, |
| 2614 | struct aarch64_insn_data *data) |
| 2615 | { |
| 2616 | struct aarch64_displaced_step_data *dsd |
| 2617 | = (struct aarch64_displaced_step_data *) data; |
| 2618 | |
| 2619 | /* GDB has to fix up PC after displaced step this instruction |
| 2620 | differently according to the condition is true or false. Instead |
| 2621 | of checking COND against conditional flags, we can use |
| 2622 | the following instructions, and GDB can tell how to fix up PC |
| 2623 | according to the PC value. |
| 2624 | |
| 2625 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
| 2626 | INSN1 ; |
| 2627 | TAKEN: |
| 2628 | INSN2 |
| 2629 | */ |
| 2630 | |
| 2631 | emit_bcond (dsd->insn_buf, cond, 8); |
| 2632 | dsd->dsc->cond = 1; |
| 2633 | dsd->dsc->pc_adjust = offset; |
| 2634 | dsd->insn_count = 1; |
| 2635 | } |
| 2636 | |
| 2637 | /* Dynamically allocate a new register. If we know the register |
| 2638 | statically, we should make it a global as above instead of using this |
| 2639 | helper function. */ |
| 2640 | |
| 2641 | static struct aarch64_register |
| 2642 | aarch64_register (unsigned num, int is64) |
| 2643 | { |
| 2644 | return (struct aarch64_register) { num, is64 }; |
| 2645 | } |
| 2646 | |
| 2647 | /* Implementation of aarch64_insn_visitor method "cb". */ |
| 2648 | |
| 2649 | static void |
| 2650 | aarch64_displaced_step_cb (const int32_t offset, const int is_cbnz, |
| 2651 | const unsigned rn, int is64, |
| 2652 | struct aarch64_insn_data *data) |
| 2653 | { |
| 2654 | struct aarch64_displaced_step_data *dsd |
| 2655 | = (struct aarch64_displaced_step_data *) data; |
| 2656 | |
| 2657 | /* The offset is out of range for a compare and branch |
| 2658 | instruction. We can use the following instructions instead: |
| 2659 | |
| 2660 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. |
| 2661 | INSN1 ; |
| 2662 | TAKEN: |
| 2663 | INSN2 |
| 2664 | */ |
| 2665 | emit_cb (dsd->insn_buf, is_cbnz, aarch64_register (rn, is64), 8); |
| 2666 | dsd->insn_count = 1; |
| 2667 | dsd->dsc->cond = 1; |
| 2668 | dsd->dsc->pc_adjust = offset; |
| 2669 | } |
| 2670 | |
| 2671 | /* Implementation of aarch64_insn_visitor method "tb". */ |
| 2672 | |
| 2673 | static void |
| 2674 | aarch64_displaced_step_tb (const int32_t offset, int is_tbnz, |
| 2675 | const unsigned rt, unsigned bit, |
| 2676 | struct aarch64_insn_data *data) |
| 2677 | { |
| 2678 | struct aarch64_displaced_step_data *dsd |
| 2679 | = (struct aarch64_displaced_step_data *) data; |
| 2680 | |
| 2681 | /* The offset is out of range for a test bit and branch |
| 2682 | instruction We can use the following instructions instead: |
| 2683 | |
| 2684 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. |
| 2685 | INSN1 ; |
| 2686 | TAKEN: |
| 2687 | INSN2 |
| 2688 | |
| 2689 | */ |
| 2690 | emit_tb (dsd->insn_buf, is_tbnz, bit, aarch64_register (rt, 1), 8); |
| 2691 | dsd->insn_count = 1; |
| 2692 | dsd->dsc->cond = 1; |
| 2693 | dsd->dsc->pc_adjust = offset; |
| 2694 | } |
| 2695 | |
| 2696 | /* Implementation of aarch64_insn_visitor method "adr". */ |
| 2697 | |
| 2698 | static void |
| 2699 | aarch64_displaced_step_adr (const int32_t offset, const unsigned rd, |
| 2700 | const int is_adrp, struct aarch64_insn_data *data) |
| 2701 | { |
| 2702 | struct aarch64_displaced_step_data *dsd |
| 2703 | = (struct aarch64_displaced_step_data *) data; |
| 2704 | /* We know exactly the address the ADR{P,} instruction will compute. |
| 2705 | We can just write it to the destination register. */ |
| 2706 | CORE_ADDR address = data->insn_addr + offset; |
| 2707 | |
| 2708 | if (is_adrp) |
| 2709 | { |
| 2710 | /* Clear the lower 12 bits of the offset to get the 4K page. */ |
| 2711 | regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rd, |
| 2712 | address & ~0xfff); |
| 2713 | } |
| 2714 | else |
| 2715 | regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rd, |
| 2716 | address); |
| 2717 | |
| 2718 | dsd->dsc->pc_adjust = 4; |
| 2719 | emit_nop (dsd->insn_buf); |
| 2720 | dsd->insn_count = 1; |
| 2721 | } |
| 2722 | |
| 2723 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
| 2724 | |
| 2725 | static void |
| 2726 | aarch64_displaced_step_ldr_literal (const int32_t offset, const int is_sw, |
| 2727 | const unsigned rt, const int is64, |
| 2728 | struct aarch64_insn_data *data) |
| 2729 | { |
| 2730 | struct aarch64_displaced_step_data *dsd |
| 2731 | = (struct aarch64_displaced_step_data *) data; |
| 2732 | CORE_ADDR address = data->insn_addr + offset; |
| 2733 | struct aarch64_memory_operand zero = { MEMORY_OPERAND_OFFSET, 0 }; |
| 2734 | |
| 2735 | regcache_cooked_write_unsigned (dsd->regs, AARCH64_X0_REGNUM + rt, |
| 2736 | address); |
| 2737 | |
| 2738 | if (is_sw) |
| 2739 | dsd->insn_count = emit_ldrsw (dsd->insn_buf, aarch64_register (rt, 1), |
| 2740 | aarch64_register (rt, 1), zero); |
| 2741 | else |
| 2742 | dsd->insn_count = emit_ldr (dsd->insn_buf, aarch64_register (rt, is64), |
| 2743 | aarch64_register (rt, 1), zero); |
| 2744 | |
| 2745 | dsd->dsc->pc_adjust = 4; |
| 2746 | } |
| 2747 | |
| 2748 | /* Implementation of aarch64_insn_visitor method "others". */ |
| 2749 | |
| 2750 | static void |
| 2751 | aarch64_displaced_step_others (const uint32_t insn, |
| 2752 | struct aarch64_insn_data *data) |
| 2753 | { |
| 2754 | struct aarch64_displaced_step_data *dsd |
| 2755 | = (struct aarch64_displaced_step_data *) data; |
| 2756 | |
| 2757 | aarch64_emit_insn (dsd->insn_buf, insn); |
| 2758 | dsd->insn_count = 1; |
| 2759 | |
| 2760 | if ((insn & 0xfffffc1f) == 0xd65f0000) |
| 2761 | { |
| 2762 | /* RET */ |
| 2763 | dsd->dsc->pc_adjust = 0; |
| 2764 | } |
| 2765 | else |
| 2766 | dsd->dsc->pc_adjust = 4; |
| 2767 | } |
| 2768 | |
| 2769 | static const struct aarch64_insn_visitor visitor = |
| 2770 | { |
| 2771 | aarch64_displaced_step_b, |
| 2772 | aarch64_displaced_step_b_cond, |
| 2773 | aarch64_displaced_step_cb, |
| 2774 | aarch64_displaced_step_tb, |
| 2775 | aarch64_displaced_step_adr, |
| 2776 | aarch64_displaced_step_ldr_literal, |
| 2777 | aarch64_displaced_step_others, |
| 2778 | }; |
| 2779 | |
| 2780 | /* Implement the "displaced_step_copy_insn" gdbarch method. */ |
| 2781 | |
| 2782 | struct displaced_step_closure * |
| 2783 | aarch64_displaced_step_copy_insn (struct gdbarch *gdbarch, |
| 2784 | CORE_ADDR from, CORE_ADDR to, |
| 2785 | struct regcache *regs) |
| 2786 | { |
| 2787 | enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch); |
| 2788 | uint32_t insn = read_memory_unsigned_integer (from, 4, byte_order_for_code); |
| 2789 | struct aarch64_displaced_step_data dsd; |
| 2790 | aarch64_inst inst; |
| 2791 | |
| 2792 | if (aarch64_decode_insn (insn, &inst, 1, NULL) != 0) |
| 2793 | return NULL; |
| 2794 | |
| 2795 | /* Look for a Load Exclusive instruction which begins the sequence. */ |
| 2796 | if (inst.opcode->iclass == ldstexcl && bit (insn, 22)) |
| 2797 | { |
| 2798 | /* We can't displaced step atomic sequences. */ |
| 2799 | return NULL; |
| 2800 | } |
| 2801 | |
| 2802 | std::unique_ptr<aarch64_displaced_step_closure> dsc |
| 2803 | (new aarch64_displaced_step_closure); |
| 2804 | dsd.base.insn_addr = from; |
| 2805 | dsd.new_addr = to; |
| 2806 | dsd.regs = regs; |
| 2807 | dsd.dsc = dsc.get (); |
| 2808 | dsd.insn_count = 0; |
| 2809 | aarch64_relocate_instruction (insn, &visitor, |
| 2810 | (struct aarch64_insn_data *) &dsd); |
| 2811 | gdb_assert (dsd.insn_count <= DISPLACED_MODIFIED_INSNS); |
| 2812 | |
| 2813 | if (dsd.insn_count != 0) |
| 2814 | { |
| 2815 | int i; |
| 2816 | |
| 2817 | /* Instruction can be relocated to scratch pad. Copy |
| 2818 | relocated instruction(s) there. */ |
| 2819 | for (i = 0; i < dsd.insn_count; i++) |
| 2820 | { |
| 2821 | if (debug_displaced) |
| 2822 | { |
| 2823 | debug_printf ("displaced: writing insn "); |
| 2824 | debug_printf ("%.8x", dsd.insn_buf[i]); |
| 2825 | debug_printf (" at %s\n", paddress (gdbarch, to + i * 4)); |
| 2826 | } |
| 2827 | write_memory_unsigned_integer (to + i * 4, 4, byte_order_for_code, |
| 2828 | (ULONGEST) dsd.insn_buf[i]); |
| 2829 | } |
| 2830 | } |
| 2831 | else |
| 2832 | { |
| 2833 | dsc = NULL; |
| 2834 | } |
| 2835 | |
| 2836 | return dsc.release (); |
| 2837 | } |
| 2838 | |
| 2839 | /* Implement the "displaced_step_fixup" gdbarch method. */ |
| 2840 | |
| 2841 | void |
| 2842 | aarch64_displaced_step_fixup (struct gdbarch *gdbarch, |
| 2843 | struct displaced_step_closure *dsc_, |
| 2844 | CORE_ADDR from, CORE_ADDR to, |
| 2845 | struct regcache *regs) |
| 2846 | { |
| 2847 | aarch64_displaced_step_closure *dsc = (aarch64_displaced_step_closure *) dsc_; |
| 2848 | |
| 2849 | if (dsc->cond) |
| 2850 | { |
| 2851 | ULONGEST pc; |
| 2852 | |
| 2853 | regcache_cooked_read_unsigned (regs, AARCH64_PC_REGNUM, &pc); |
| 2854 | if (pc - to == 8) |
| 2855 | { |
| 2856 | /* Condition is true. */ |
| 2857 | } |
| 2858 | else if (pc - to == 4) |
| 2859 | { |
| 2860 | /* Condition is false. */ |
| 2861 | dsc->pc_adjust = 4; |
| 2862 | } |
| 2863 | else |
| 2864 | gdb_assert_not_reached ("Unexpected PC value after displaced stepping"); |
| 2865 | } |
| 2866 | |
| 2867 | if (dsc->pc_adjust != 0) |
| 2868 | { |
| 2869 | if (debug_displaced) |
| 2870 | { |
| 2871 | debug_printf ("displaced: fixup: set PC to %s:%d\n", |
| 2872 | paddress (gdbarch, from), dsc->pc_adjust); |
| 2873 | } |
| 2874 | regcache_cooked_write_unsigned (regs, AARCH64_PC_REGNUM, |
| 2875 | from + dsc->pc_adjust); |
| 2876 | } |
| 2877 | } |
| 2878 | |
| 2879 | /* Implement the "displaced_step_hw_singlestep" gdbarch method. */ |
| 2880 | |
| 2881 | int |
| 2882 | aarch64_displaced_step_hw_singlestep (struct gdbarch *gdbarch, |
| 2883 | struct displaced_step_closure *closure) |
| 2884 | { |
| 2885 | return 1; |
| 2886 | } |
| 2887 | |
| 2888 | /* Get the correct target description for the given VQ value. |
| 2889 | If VQ is zero then it is assumed SVE is not supported. |
| 2890 | (It is not possible to set VQ to zero on an SVE system). */ |
| 2891 | |
| 2892 | const target_desc * |
| 2893 | aarch64_read_description (uint64_t vq) |
| 2894 | { |
| 2895 | if (vq > AARCH64_MAX_SVE_VQ) |
| 2896 | error (_("VQ is %" PRIu64 ", maximum supported value is %d"), vq, |
| 2897 | AARCH64_MAX_SVE_VQ); |
| 2898 | |
| 2899 | struct target_desc *tdesc = tdesc_aarch64_list[vq]; |
| 2900 | |
| 2901 | if (tdesc == NULL) |
| 2902 | { |
| 2903 | tdesc = aarch64_create_target_description (vq); |
| 2904 | tdesc_aarch64_list[vq] = tdesc; |
| 2905 | } |
| 2906 | |
| 2907 | return tdesc; |
| 2908 | } |
| 2909 | |
| 2910 | /* Return the VQ used when creating the target description TDESC. */ |
| 2911 | |
| 2912 | static uint64_t |
| 2913 | aarch64_get_tdesc_vq (const struct target_desc *tdesc) |
| 2914 | { |
| 2915 | const struct tdesc_feature *feature_sve; |
| 2916 | |
| 2917 | if (!tdesc_has_registers (tdesc)) |
| 2918 | return 0; |
| 2919 | |
| 2920 | feature_sve = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.sve"); |
| 2921 | |
| 2922 | if (feature_sve == nullptr) |
| 2923 | return 0; |
| 2924 | |
| 2925 | uint64_t vl = tdesc_register_bitsize (feature_sve, |
| 2926 | aarch64_sve_register_names[0]) / 8; |
| 2927 | return sve_vq_from_vl (vl); |
| 2928 | } |
| 2929 | |
| 2930 | |
| 2931 | /* Initialize the current architecture based on INFO. If possible, |
| 2932 | re-use an architecture from ARCHES, which is a list of |
| 2933 | architectures already created during this debugging session. |
| 2934 | |
| 2935 | Called e.g. at program startup, when reading a core file, and when |
| 2936 | reading a binary file. */ |
| 2937 | |
| 2938 | static struct gdbarch * |
| 2939 | aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 2940 | { |
| 2941 | struct gdbarch_tdep *tdep; |
| 2942 | struct gdbarch *gdbarch; |
| 2943 | struct gdbarch_list *best_arch; |
| 2944 | struct tdesc_arch_data *tdesc_data = NULL; |
| 2945 | const struct target_desc *tdesc = info.target_desc; |
| 2946 | int i; |
| 2947 | int valid_p = 1; |
| 2948 | const struct tdesc_feature *feature_core; |
| 2949 | const struct tdesc_feature *feature_fpu; |
| 2950 | const struct tdesc_feature *feature_sve; |
| 2951 | int num_regs = 0; |
| 2952 | int num_pseudo_regs = 0; |
| 2953 | |
| 2954 | /* Ensure we always have a target description. */ |
| 2955 | if (!tdesc_has_registers (tdesc)) |
| 2956 | tdesc = aarch64_read_description (0); |
| 2957 | gdb_assert (tdesc); |
| 2958 | |
| 2959 | feature_core = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.core"); |
| 2960 | feature_fpu = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.fpu"); |
| 2961 | feature_sve = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.sve"); |
| 2962 | |
| 2963 | if (feature_core == NULL) |
| 2964 | return NULL; |
| 2965 | |
| 2966 | tdesc_data = tdesc_data_alloc (); |
| 2967 | |
| 2968 | /* Validate the description provides the mandatory core R registers |
| 2969 | and allocate their numbers. */ |
| 2970 | for (i = 0; i < ARRAY_SIZE (aarch64_r_register_names); i++) |
| 2971 | valid_p &= tdesc_numbered_register (feature_core, tdesc_data, |
| 2972 | AARCH64_X0_REGNUM + i, |
| 2973 | aarch64_r_register_names[i]); |
| 2974 | |
| 2975 | num_regs = AARCH64_X0_REGNUM + i; |
| 2976 | |
| 2977 | /* Add the V registers. */ |
| 2978 | if (feature_fpu != NULL) |
| 2979 | { |
| 2980 | if (feature_sve != NULL) |
| 2981 | error (_("Program contains both fpu and SVE features.")); |
| 2982 | |
| 2983 | /* Validate the description provides the mandatory V registers |
| 2984 | and allocate their numbers. */ |
| 2985 | for (i = 0; i < ARRAY_SIZE (aarch64_v_register_names); i++) |
| 2986 | valid_p &= tdesc_numbered_register (feature_fpu, tdesc_data, |
| 2987 | AARCH64_V0_REGNUM + i, |
| 2988 | aarch64_v_register_names[i]); |
| 2989 | |
| 2990 | num_regs = AARCH64_V0_REGNUM + i; |
| 2991 | } |
| 2992 | |
| 2993 | /* Add the SVE registers. */ |
| 2994 | if (feature_sve != NULL) |
| 2995 | { |
| 2996 | /* Validate the description provides the mandatory SVE registers |
| 2997 | and allocate their numbers. */ |
| 2998 | for (i = 0; i < ARRAY_SIZE (aarch64_sve_register_names); i++) |
| 2999 | valid_p &= tdesc_numbered_register (feature_sve, tdesc_data, |
| 3000 | AARCH64_SVE_Z0_REGNUM + i, |
| 3001 | aarch64_sve_register_names[i]); |
| 3002 | |
| 3003 | num_regs = AARCH64_SVE_Z0_REGNUM + i; |
| 3004 | num_pseudo_regs += 32; /* add the Vn register pseudos. */ |
| 3005 | } |
| 3006 | |
| 3007 | if (feature_fpu != NULL || feature_sve != NULL) |
| 3008 | { |
| 3009 | num_pseudo_regs += 32; /* add the Qn scalar register pseudos */ |
| 3010 | num_pseudo_regs += 32; /* add the Dn scalar register pseudos */ |
| 3011 | num_pseudo_regs += 32; /* add the Sn scalar register pseudos */ |
| 3012 | num_pseudo_regs += 32; /* add the Hn scalar register pseudos */ |
| 3013 | num_pseudo_regs += 32; /* add the Bn scalar register pseudos */ |
| 3014 | } |
| 3015 | |
| 3016 | if (!valid_p) |
| 3017 | { |
| 3018 | tdesc_data_cleanup (tdesc_data); |
| 3019 | return NULL; |
| 3020 | } |
| 3021 | |
| 3022 | /* AArch64 code is always little-endian. */ |
| 3023 | info.byte_order_for_code = BFD_ENDIAN_LITTLE; |
| 3024 | |
| 3025 | /* If there is already a candidate, use it. */ |
| 3026 | for (best_arch = gdbarch_list_lookup_by_info (arches, &info); |
| 3027 | best_arch != NULL; |
| 3028 | best_arch = gdbarch_list_lookup_by_info (best_arch->next, &info)) |
| 3029 | { |
| 3030 | /* Found a match. */ |
| 3031 | break; |
| 3032 | } |
| 3033 | |
| 3034 | if (best_arch != NULL) |
| 3035 | { |
| 3036 | if (tdesc_data != NULL) |
| 3037 | tdesc_data_cleanup (tdesc_data); |
| 3038 | return best_arch->gdbarch; |
| 3039 | } |
| 3040 | |
| 3041 | tdep = XCNEW (struct gdbarch_tdep); |
| 3042 | gdbarch = gdbarch_alloc (&info, tdep); |
| 3043 | |
| 3044 | /* This should be low enough for everything. */ |
| 3045 | tdep->lowest_pc = 0x20; |
| 3046 | tdep->jb_pc = -1; /* Longjump support not enabled by default. */ |
| 3047 | tdep->jb_elt_size = 8; |
| 3048 | tdep->vq = aarch64_get_tdesc_vq (tdesc); |
| 3049 | |
| 3050 | set_gdbarch_push_dummy_call (gdbarch, aarch64_push_dummy_call); |
| 3051 | set_gdbarch_frame_align (gdbarch, aarch64_frame_align); |
| 3052 | |
| 3053 | /* Frame handling. */ |
| 3054 | set_gdbarch_dummy_id (gdbarch, aarch64_dummy_id); |
| 3055 | set_gdbarch_unwind_pc (gdbarch, aarch64_unwind_pc); |
| 3056 | set_gdbarch_unwind_sp (gdbarch, aarch64_unwind_sp); |
| 3057 | |
| 3058 | /* Advance PC across function entry code. */ |
| 3059 | set_gdbarch_skip_prologue (gdbarch, aarch64_skip_prologue); |
| 3060 | |
| 3061 | /* The stack grows downward. */ |
| 3062 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 3063 | |
| 3064 | /* Breakpoint manipulation. */ |
| 3065 | set_gdbarch_breakpoint_kind_from_pc (gdbarch, |
| 3066 | aarch64_breakpoint::kind_from_pc); |
| 3067 | set_gdbarch_sw_breakpoint_from_kind (gdbarch, |
| 3068 | aarch64_breakpoint::bp_from_kind); |
| 3069 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); |
| 3070 | set_gdbarch_software_single_step (gdbarch, aarch64_software_single_step); |
| 3071 | |
| 3072 | /* Information about registers, etc. */ |
| 3073 | set_gdbarch_sp_regnum (gdbarch, AARCH64_SP_REGNUM); |
| 3074 | set_gdbarch_pc_regnum (gdbarch, AARCH64_PC_REGNUM); |
| 3075 | set_gdbarch_num_regs (gdbarch, num_regs); |
| 3076 | |
| 3077 | set_gdbarch_num_pseudo_regs (gdbarch, num_pseudo_regs); |
| 3078 | set_gdbarch_pseudo_register_read_value (gdbarch, aarch64_pseudo_read_value); |
| 3079 | set_gdbarch_pseudo_register_write (gdbarch, aarch64_pseudo_write); |
| 3080 | set_tdesc_pseudo_register_name (gdbarch, aarch64_pseudo_register_name); |
| 3081 | set_tdesc_pseudo_register_type (gdbarch, aarch64_pseudo_register_type); |
| 3082 | set_tdesc_pseudo_register_reggroup_p (gdbarch, |
| 3083 | aarch64_pseudo_register_reggroup_p); |
| 3084 | |
| 3085 | /* ABI */ |
| 3086 | set_gdbarch_short_bit (gdbarch, 16); |
| 3087 | set_gdbarch_int_bit (gdbarch, 32); |
| 3088 | set_gdbarch_float_bit (gdbarch, 32); |
| 3089 | set_gdbarch_double_bit (gdbarch, 64); |
| 3090 | set_gdbarch_long_double_bit (gdbarch, 128); |
| 3091 | set_gdbarch_long_bit (gdbarch, 64); |
| 3092 | set_gdbarch_long_long_bit (gdbarch, 64); |
| 3093 | set_gdbarch_ptr_bit (gdbarch, 64); |
| 3094 | set_gdbarch_char_signed (gdbarch, 0); |
| 3095 | set_gdbarch_wchar_signed (gdbarch, 0); |
| 3096 | set_gdbarch_float_format (gdbarch, floatformats_ieee_single); |
| 3097 | set_gdbarch_double_format (gdbarch, floatformats_ieee_double); |
| 3098 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); |
| 3099 | |
| 3100 | /* Internal <-> external register number maps. */ |
| 3101 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, aarch64_dwarf_reg_to_regnum); |
| 3102 | |
| 3103 | /* Returning results. */ |
| 3104 | set_gdbarch_return_value (gdbarch, aarch64_return_value); |
| 3105 | |
| 3106 | /* Disassembly. */ |
| 3107 | set_gdbarch_print_insn (gdbarch, aarch64_gdb_print_insn); |
| 3108 | |
| 3109 | /* Virtual tables. */ |
| 3110 | set_gdbarch_vbit_in_delta (gdbarch, 1); |
| 3111 | |
| 3112 | /* Hook in the ABI-specific overrides, if they have been registered. */ |
| 3113 | info.target_desc = tdesc; |
| 3114 | info.tdesc_data = tdesc_data; |
| 3115 | gdbarch_init_osabi (info, gdbarch); |
| 3116 | |
| 3117 | dwarf2_frame_set_init_reg (gdbarch, aarch64_dwarf2_frame_init_reg); |
| 3118 | |
| 3119 | /* Add some default predicates. */ |
| 3120 | frame_unwind_append_unwinder (gdbarch, &aarch64_stub_unwind); |
| 3121 | dwarf2_append_unwinders (gdbarch); |
| 3122 | frame_unwind_append_unwinder (gdbarch, &aarch64_prologue_unwind); |
| 3123 | |
| 3124 | frame_base_set_default (gdbarch, &aarch64_normal_base); |
| 3125 | |
| 3126 | /* Now we have tuned the configuration, set a few final things, |
| 3127 | based on what the OS ABI has told us. */ |
| 3128 | |
| 3129 | if (tdep->jb_pc >= 0) |
| 3130 | set_gdbarch_get_longjmp_target (gdbarch, aarch64_get_longjmp_target); |
| 3131 | |
| 3132 | set_gdbarch_gen_return_address (gdbarch, aarch64_gen_return_address); |
| 3133 | |
| 3134 | tdesc_use_registers (gdbarch, tdesc, tdesc_data); |
| 3135 | |
| 3136 | /* Add standard register aliases. */ |
| 3137 | for (i = 0; i < ARRAY_SIZE (aarch64_register_aliases); i++) |
| 3138 | user_reg_add (gdbarch, aarch64_register_aliases[i].name, |
| 3139 | value_of_aarch64_user_reg, |
| 3140 | &aarch64_register_aliases[i].regnum); |
| 3141 | |
| 3142 | return gdbarch; |
| 3143 | } |
| 3144 | |
| 3145 | static void |
| 3146 | aarch64_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file) |
| 3147 | { |
| 3148 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 3149 | |
| 3150 | if (tdep == NULL) |
| 3151 | return; |
| 3152 | |
| 3153 | fprintf_unfiltered (file, _("aarch64_dump_tdep: Lowest pc = 0x%s"), |
| 3154 | paddress (gdbarch, tdep->lowest_pc)); |
| 3155 | } |
| 3156 | |
| 3157 | #if GDB_SELF_TEST |
| 3158 | namespace selftests |
| 3159 | { |
| 3160 | static void aarch64_process_record_test (void); |
| 3161 | } |
| 3162 | #endif |
| 3163 | |
| 3164 | void |
| 3165 | _initialize_aarch64_tdep (void) |
| 3166 | { |
| 3167 | gdbarch_register (bfd_arch_aarch64, aarch64_gdbarch_init, |
| 3168 | aarch64_dump_tdep); |
| 3169 | |
| 3170 | /* Debug this file's internals. */ |
| 3171 | add_setshow_boolean_cmd ("aarch64", class_maintenance, &aarch64_debug, _("\ |
| 3172 | Set AArch64 debugging."), _("\ |
| 3173 | Show AArch64 debugging."), _("\ |
| 3174 | When on, AArch64 specific debugging is enabled."), |
| 3175 | NULL, |
| 3176 | show_aarch64_debug, |
| 3177 | &setdebuglist, &showdebuglist); |
| 3178 | |
| 3179 | #if GDB_SELF_TEST |
| 3180 | selftests::register_test ("aarch64-analyze-prologue", |
| 3181 | selftests::aarch64_analyze_prologue_test); |
| 3182 | selftests::register_test ("aarch64-process-record", |
| 3183 | selftests::aarch64_process_record_test); |
| 3184 | selftests::record_xml_tdesc ("aarch64.xml", |
| 3185 | aarch64_create_target_description (0)); |
| 3186 | #endif |
| 3187 | } |
| 3188 | |
| 3189 | /* AArch64 process record-replay related structures, defines etc. */ |
| 3190 | |
| 3191 | #define REG_ALLOC(REGS, LENGTH, RECORD_BUF) \ |
| 3192 | do \ |
| 3193 | { \ |
| 3194 | unsigned int reg_len = LENGTH; \ |
| 3195 | if (reg_len) \ |
| 3196 | { \ |
| 3197 | REGS = XNEWVEC (uint32_t, reg_len); \ |
| 3198 | memcpy(®S[0], &RECORD_BUF[0], sizeof(uint32_t)*LENGTH); \ |
| 3199 | } \ |
| 3200 | } \ |
| 3201 | while (0) |
| 3202 | |
| 3203 | #define MEM_ALLOC(MEMS, LENGTH, RECORD_BUF) \ |
| 3204 | do \ |
| 3205 | { \ |
| 3206 | unsigned int mem_len = LENGTH; \ |
| 3207 | if (mem_len) \ |
| 3208 | { \ |
| 3209 | MEMS = XNEWVEC (struct aarch64_mem_r, mem_len); \ |
| 3210 | memcpy(&MEMS->len, &RECORD_BUF[0], \ |
| 3211 | sizeof(struct aarch64_mem_r) * LENGTH); \ |
| 3212 | } \ |
| 3213 | } \ |
| 3214 | while (0) |
| 3215 | |
| 3216 | /* AArch64 record/replay structures and enumerations. */ |
| 3217 | |
| 3218 | struct aarch64_mem_r |
| 3219 | { |
| 3220 | uint64_t len; /* Record length. */ |
| 3221 | uint64_t addr; /* Memory address. */ |
| 3222 | }; |
| 3223 | |
| 3224 | enum aarch64_record_result |
| 3225 | { |
| 3226 | AARCH64_RECORD_SUCCESS, |
| 3227 | AARCH64_RECORD_UNSUPPORTED, |
| 3228 | AARCH64_RECORD_UNKNOWN |
| 3229 | }; |
| 3230 | |
| 3231 | typedef struct insn_decode_record_t |
| 3232 | { |
| 3233 | struct gdbarch *gdbarch; |
| 3234 | struct regcache *regcache; |
| 3235 | CORE_ADDR this_addr; /* Address of insn to be recorded. */ |
| 3236 | uint32_t aarch64_insn; /* Insn to be recorded. */ |
| 3237 | uint32_t mem_rec_count; /* Count of memory records. */ |
| 3238 | uint32_t reg_rec_count; /* Count of register records. */ |
| 3239 | uint32_t *aarch64_regs; /* Registers to be recorded. */ |
| 3240 | struct aarch64_mem_r *aarch64_mems; /* Memory locations to be recorded. */ |
| 3241 | } insn_decode_record; |
| 3242 | |
| 3243 | /* Record handler for data processing - register instructions. */ |
| 3244 | |
| 3245 | static unsigned int |
| 3246 | aarch64_record_data_proc_reg (insn_decode_record *aarch64_insn_r) |
| 3247 | { |
| 3248 | uint8_t reg_rd, insn_bits24_27, insn_bits21_23; |
| 3249 | uint32_t record_buf[4]; |
| 3250 | |
| 3251 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3252 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3253 | insn_bits21_23 = bits (aarch64_insn_r->aarch64_insn, 21, 23); |
| 3254 | |
| 3255 | if (!bit (aarch64_insn_r->aarch64_insn, 28)) |
| 3256 | { |
| 3257 | uint8_t setflags; |
| 3258 | |
| 3259 | /* Logical (shifted register). */ |
| 3260 | if (insn_bits24_27 == 0x0a) |
| 3261 | setflags = (bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03); |
| 3262 | /* Add/subtract. */ |
| 3263 | else if (insn_bits24_27 == 0x0b) |
| 3264 | setflags = bit (aarch64_insn_r->aarch64_insn, 29); |
| 3265 | else |
| 3266 | return AARCH64_RECORD_UNKNOWN; |
| 3267 | |
| 3268 | record_buf[0] = reg_rd; |
| 3269 | aarch64_insn_r->reg_rec_count = 1; |
| 3270 | if (setflags) |
| 3271 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 3272 | } |
| 3273 | else |
| 3274 | { |
| 3275 | if (insn_bits24_27 == 0x0b) |
| 3276 | { |
| 3277 | /* Data-processing (3 source). */ |
| 3278 | record_buf[0] = reg_rd; |
| 3279 | aarch64_insn_r->reg_rec_count = 1; |
| 3280 | } |
| 3281 | else if (insn_bits24_27 == 0x0a) |
| 3282 | { |
| 3283 | if (insn_bits21_23 == 0x00) |
| 3284 | { |
| 3285 | /* Add/subtract (with carry). */ |
| 3286 | record_buf[0] = reg_rd; |
| 3287 | aarch64_insn_r->reg_rec_count = 1; |
| 3288 | if (bit (aarch64_insn_r->aarch64_insn, 29)) |
| 3289 | { |
| 3290 | record_buf[1] = AARCH64_CPSR_REGNUM; |
| 3291 | aarch64_insn_r->reg_rec_count = 2; |
| 3292 | } |
| 3293 | } |
| 3294 | else if (insn_bits21_23 == 0x02) |
| 3295 | { |
| 3296 | /* Conditional compare (register) and conditional compare |
| 3297 | (immediate) instructions. */ |
| 3298 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3299 | aarch64_insn_r->reg_rec_count = 1; |
| 3300 | } |
| 3301 | else if (insn_bits21_23 == 0x04 || insn_bits21_23 == 0x06) |
| 3302 | { |
| 3303 | /* CConditional select. */ |
| 3304 | /* Data-processing (2 source). */ |
| 3305 | /* Data-processing (1 source). */ |
| 3306 | record_buf[0] = reg_rd; |
| 3307 | aarch64_insn_r->reg_rec_count = 1; |
| 3308 | } |
| 3309 | else |
| 3310 | return AARCH64_RECORD_UNKNOWN; |
| 3311 | } |
| 3312 | } |
| 3313 | |
| 3314 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3315 | record_buf); |
| 3316 | return AARCH64_RECORD_SUCCESS; |
| 3317 | } |
| 3318 | |
| 3319 | /* Record handler for data processing - immediate instructions. */ |
| 3320 | |
| 3321 | static unsigned int |
| 3322 | aarch64_record_data_proc_imm (insn_decode_record *aarch64_insn_r) |
| 3323 | { |
| 3324 | uint8_t reg_rd, insn_bit23, insn_bits24_27, setflags; |
| 3325 | uint32_t record_buf[4]; |
| 3326 | |
| 3327 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3328 | insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23); |
| 3329 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3330 | |
| 3331 | if (insn_bits24_27 == 0x00 /* PC rel addressing. */ |
| 3332 | || insn_bits24_27 == 0x03 /* Bitfield and Extract. */ |
| 3333 | || (insn_bits24_27 == 0x02 && insn_bit23)) /* Move wide (immediate). */ |
| 3334 | { |
| 3335 | record_buf[0] = reg_rd; |
| 3336 | aarch64_insn_r->reg_rec_count = 1; |
| 3337 | } |
| 3338 | else if (insn_bits24_27 == 0x01) |
| 3339 | { |
| 3340 | /* Add/Subtract (immediate). */ |
| 3341 | setflags = bit (aarch64_insn_r->aarch64_insn, 29); |
| 3342 | record_buf[0] = reg_rd; |
| 3343 | aarch64_insn_r->reg_rec_count = 1; |
| 3344 | if (setflags) |
| 3345 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 3346 | } |
| 3347 | else if (insn_bits24_27 == 0x02 && !insn_bit23) |
| 3348 | { |
| 3349 | /* Logical (immediate). */ |
| 3350 | setflags = bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03; |
| 3351 | record_buf[0] = reg_rd; |
| 3352 | aarch64_insn_r->reg_rec_count = 1; |
| 3353 | if (setflags) |
| 3354 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 3355 | } |
| 3356 | else |
| 3357 | return AARCH64_RECORD_UNKNOWN; |
| 3358 | |
| 3359 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3360 | record_buf); |
| 3361 | return AARCH64_RECORD_SUCCESS; |
| 3362 | } |
| 3363 | |
| 3364 | /* Record handler for branch, exception generation and system instructions. */ |
| 3365 | |
| 3366 | static unsigned int |
| 3367 | aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r) |
| 3368 | { |
| 3369 | struct gdbarch_tdep *tdep = gdbarch_tdep (aarch64_insn_r->gdbarch); |
| 3370 | uint8_t insn_bits24_27, insn_bits28_31, insn_bits22_23; |
| 3371 | uint32_t record_buf[4]; |
| 3372 | |
| 3373 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3374 | insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); |
| 3375 | insn_bits22_23 = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3376 | |
| 3377 | if (insn_bits28_31 == 0x0d) |
| 3378 | { |
| 3379 | /* Exception generation instructions. */ |
| 3380 | if (insn_bits24_27 == 0x04) |
| 3381 | { |
| 3382 | if (!bits (aarch64_insn_r->aarch64_insn, 2, 4) |
| 3383 | && !bits (aarch64_insn_r->aarch64_insn, 21, 23) |
| 3384 | && bits (aarch64_insn_r->aarch64_insn, 0, 1) == 0x01) |
| 3385 | { |
| 3386 | ULONGEST svc_number; |
| 3387 | |
| 3388 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, 8, |
| 3389 | &svc_number); |
| 3390 | return tdep->aarch64_syscall_record (aarch64_insn_r->regcache, |
| 3391 | svc_number); |
| 3392 | } |
| 3393 | else |
| 3394 | return AARCH64_RECORD_UNSUPPORTED; |
| 3395 | } |
| 3396 | /* System instructions. */ |
| 3397 | else if (insn_bits24_27 == 0x05 && insn_bits22_23 == 0x00) |
| 3398 | { |
| 3399 | uint32_t reg_rt, reg_crn; |
| 3400 | |
| 3401 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3402 | reg_crn = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3403 | |
| 3404 | /* Record rt in case of sysl and mrs instructions. */ |
| 3405 | if (bit (aarch64_insn_r->aarch64_insn, 21)) |
| 3406 | { |
| 3407 | record_buf[0] = reg_rt; |
| 3408 | aarch64_insn_r->reg_rec_count = 1; |
| 3409 | } |
| 3410 | /* Record cpsr for hint and msr(immediate) instructions. */ |
| 3411 | else if (reg_crn == 0x02 || reg_crn == 0x04) |
| 3412 | { |
| 3413 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3414 | aarch64_insn_r->reg_rec_count = 1; |
| 3415 | } |
| 3416 | } |
| 3417 | /* Unconditional branch (register). */ |
| 3418 | else if((insn_bits24_27 & 0x0e) == 0x06) |
| 3419 | { |
| 3420 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3421 | if (bits (aarch64_insn_r->aarch64_insn, 21, 22) == 0x01) |
| 3422 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM; |
| 3423 | } |
| 3424 | else |
| 3425 | return AARCH64_RECORD_UNKNOWN; |
| 3426 | } |
| 3427 | /* Unconditional branch (immediate). */ |
| 3428 | else if ((insn_bits28_31 & 0x07) == 0x01 && (insn_bits24_27 & 0x0c) == 0x04) |
| 3429 | { |
| 3430 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3431 | if (bit (aarch64_insn_r->aarch64_insn, 31)) |
| 3432 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM; |
| 3433 | } |
| 3434 | else |
| 3435 | /* Compare & branch (immediate), Test & branch (immediate) and |
| 3436 | Conditional branch (immediate). */ |
| 3437 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3438 | |
| 3439 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3440 | record_buf); |
| 3441 | return AARCH64_RECORD_SUCCESS; |
| 3442 | } |
| 3443 | |
| 3444 | /* Record handler for advanced SIMD load and store instructions. */ |
| 3445 | |
| 3446 | static unsigned int |
| 3447 | aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r) |
| 3448 | { |
| 3449 | CORE_ADDR address; |
| 3450 | uint64_t addr_offset = 0; |
| 3451 | uint32_t record_buf[24]; |
| 3452 | uint64_t record_buf_mem[24]; |
| 3453 | uint32_t reg_rn, reg_rt; |
| 3454 | uint32_t reg_index = 0, mem_index = 0; |
| 3455 | uint8_t opcode_bits, size_bits; |
| 3456 | |
| 3457 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3458 | reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); |
| 3459 | size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3460 | opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3461 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address); |
| 3462 | |
| 3463 | if (record_debug) |
| 3464 | debug_printf ("Process record: Advanced SIMD load/store\n"); |
| 3465 | |
| 3466 | /* Load/store single structure. */ |
| 3467 | if (bit (aarch64_insn_r->aarch64_insn, 24)) |
| 3468 | { |
| 3469 | uint8_t sindex, scale, selem, esize, replicate = 0; |
| 3470 | scale = opcode_bits >> 2; |
| 3471 | selem = ((opcode_bits & 0x02) | |
| 3472 | bit (aarch64_insn_r->aarch64_insn, 21)) + 1; |
| 3473 | switch (scale) |
| 3474 | { |
| 3475 | case 1: |
| 3476 | if (size_bits & 0x01) |
| 3477 | return AARCH64_RECORD_UNKNOWN; |
| 3478 | break; |
| 3479 | case 2: |
| 3480 | if ((size_bits >> 1) & 0x01) |
| 3481 | return AARCH64_RECORD_UNKNOWN; |
| 3482 | if (size_bits & 0x01) |
| 3483 | { |
| 3484 | if (!((opcode_bits >> 1) & 0x01)) |
| 3485 | scale = 3; |
| 3486 | else |
| 3487 | return AARCH64_RECORD_UNKNOWN; |
| 3488 | } |
| 3489 | break; |
| 3490 | case 3: |
| 3491 | if (bit (aarch64_insn_r->aarch64_insn, 22) && !(opcode_bits & 0x01)) |
| 3492 | { |
| 3493 | scale = size_bits; |
| 3494 | replicate = 1; |
| 3495 | break; |
| 3496 | } |
| 3497 | else |
| 3498 | return AARCH64_RECORD_UNKNOWN; |
| 3499 | default: |
| 3500 | break; |
| 3501 | } |
| 3502 | esize = 8 << scale; |
| 3503 | if (replicate) |
| 3504 | for (sindex = 0; sindex < selem; sindex++) |
| 3505 | { |
| 3506 | record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; |
| 3507 | reg_rt = (reg_rt + 1) % 32; |
| 3508 | } |
| 3509 | else |
| 3510 | { |
| 3511 | for (sindex = 0; sindex < selem; sindex++) |
| 3512 | { |
| 3513 | if (bit (aarch64_insn_r->aarch64_insn, 22)) |
| 3514 | record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; |
| 3515 | else |
| 3516 | { |
| 3517 | record_buf_mem[mem_index++] = esize / 8; |
| 3518 | record_buf_mem[mem_index++] = address + addr_offset; |
| 3519 | } |
| 3520 | addr_offset = addr_offset + (esize / 8); |
| 3521 | reg_rt = (reg_rt + 1) % 32; |
| 3522 | } |
| 3523 | } |
| 3524 | } |
| 3525 | /* Load/store multiple structure. */ |
| 3526 | else |
| 3527 | { |
| 3528 | uint8_t selem, esize, rpt, elements; |
| 3529 | uint8_t eindex, rindex; |
| 3530 | |
| 3531 | esize = 8 << size_bits; |
| 3532 | if (bit (aarch64_insn_r->aarch64_insn, 30)) |
| 3533 | elements = 128 / esize; |
| 3534 | else |
| 3535 | elements = 64 / esize; |
| 3536 | |
| 3537 | switch (opcode_bits) |
| 3538 | { |
| 3539 | /*LD/ST4 (4 Registers). */ |
| 3540 | case 0: |
| 3541 | rpt = 1; |
| 3542 | selem = 4; |
| 3543 | break; |
| 3544 | /*LD/ST1 (4 Registers). */ |
| 3545 | case 2: |
| 3546 | rpt = 4; |
| 3547 | selem = 1; |
| 3548 | break; |
| 3549 | /*LD/ST3 (3 Registers). */ |
| 3550 | case 4: |
| 3551 | rpt = 1; |
| 3552 | selem = 3; |
| 3553 | break; |
| 3554 | /*LD/ST1 (3 Registers). */ |
| 3555 | case 6: |
| 3556 | rpt = 3; |
| 3557 | selem = 1; |
| 3558 | break; |
| 3559 | /*LD/ST1 (1 Register). */ |
| 3560 | case 7: |
| 3561 | rpt = 1; |
| 3562 | selem = 1; |
| 3563 | break; |
| 3564 | /*LD/ST2 (2 Registers). */ |
| 3565 | case 8: |
| 3566 | rpt = 1; |
| 3567 | selem = 2; |
| 3568 | break; |
| 3569 | /*LD/ST1 (2 Registers). */ |
| 3570 | case 10: |
| 3571 | rpt = 2; |
| 3572 | selem = 1; |
| 3573 | break; |
| 3574 | default: |
| 3575 | return AARCH64_RECORD_UNSUPPORTED; |
| 3576 | break; |
| 3577 | } |
| 3578 | for (rindex = 0; rindex < rpt; rindex++) |
| 3579 | for (eindex = 0; eindex < elements; eindex++) |
| 3580 | { |
| 3581 | uint8_t reg_tt, sindex; |
| 3582 | reg_tt = (reg_rt + rindex) % 32; |
| 3583 | for (sindex = 0; sindex < selem; sindex++) |
| 3584 | { |
| 3585 | if (bit (aarch64_insn_r->aarch64_insn, 22)) |
| 3586 | record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM; |
| 3587 | else |
| 3588 | { |
| 3589 | record_buf_mem[mem_index++] = esize / 8; |
| 3590 | record_buf_mem[mem_index++] = address + addr_offset; |
| 3591 | } |
| 3592 | addr_offset = addr_offset + (esize / 8); |
| 3593 | reg_tt = (reg_tt + 1) % 32; |
| 3594 | } |
| 3595 | } |
| 3596 | } |
| 3597 | |
| 3598 | if (bit (aarch64_insn_r->aarch64_insn, 23)) |
| 3599 | record_buf[reg_index++] = reg_rn; |
| 3600 | |
| 3601 | aarch64_insn_r->reg_rec_count = reg_index; |
| 3602 | aarch64_insn_r->mem_rec_count = mem_index / 2; |
| 3603 | MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, |
| 3604 | record_buf_mem); |
| 3605 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3606 | record_buf); |
| 3607 | return AARCH64_RECORD_SUCCESS; |
| 3608 | } |
| 3609 | |
| 3610 | /* Record handler for load and store instructions. */ |
| 3611 | |
| 3612 | static unsigned int |
| 3613 | aarch64_record_load_store (insn_decode_record *aarch64_insn_r) |
| 3614 | { |
| 3615 | uint8_t insn_bits24_27, insn_bits28_29, insn_bits10_11; |
| 3616 | uint8_t insn_bit23, insn_bit21; |
| 3617 | uint8_t opc, size_bits, ld_flag, vector_flag; |
| 3618 | uint32_t reg_rn, reg_rt, reg_rt2; |
| 3619 | uint64_t datasize, offset; |
| 3620 | uint32_t record_buf[8]; |
| 3621 | uint64_t record_buf_mem[8]; |
| 3622 | CORE_ADDR address; |
| 3623 | |
| 3624 | insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3625 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3626 | insn_bits28_29 = bits (aarch64_insn_r->aarch64_insn, 28, 29); |
| 3627 | insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); |
| 3628 | insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23); |
| 3629 | ld_flag = bit (aarch64_insn_r->aarch64_insn, 22); |
| 3630 | vector_flag = bit (aarch64_insn_r->aarch64_insn, 26); |
| 3631 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3632 | reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); |
| 3633 | reg_rt2 = bits (aarch64_insn_r->aarch64_insn, 10, 14); |
| 3634 | size_bits = bits (aarch64_insn_r->aarch64_insn, 30, 31); |
| 3635 | |
| 3636 | /* Load/store exclusive. */ |
| 3637 | if (insn_bits24_27 == 0x08 && insn_bits28_29 == 0x00) |
| 3638 | { |
| 3639 | if (record_debug) |
| 3640 | debug_printf ("Process record: load/store exclusive\n"); |
| 3641 | |
| 3642 | if (ld_flag) |
| 3643 | { |
| 3644 | record_buf[0] = reg_rt; |
| 3645 | aarch64_insn_r->reg_rec_count = 1; |
| 3646 | if (insn_bit21) |
| 3647 | { |
| 3648 | record_buf[1] = reg_rt2; |
| 3649 | aarch64_insn_r->reg_rec_count = 2; |
| 3650 | } |
| 3651 | } |
| 3652 | else |
| 3653 | { |
| 3654 | if (insn_bit21) |
| 3655 | datasize = (8 << size_bits) * 2; |
| 3656 | else |
| 3657 | datasize = (8 << size_bits); |
| 3658 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3659 | &address); |
| 3660 | record_buf_mem[0] = datasize / 8; |
| 3661 | record_buf_mem[1] = address; |
| 3662 | aarch64_insn_r->mem_rec_count = 1; |
| 3663 | if (!insn_bit23) |
| 3664 | { |
| 3665 | /* Save register rs. */ |
| 3666 | record_buf[0] = bits (aarch64_insn_r->aarch64_insn, 16, 20); |
| 3667 | aarch64_insn_r->reg_rec_count = 1; |
| 3668 | } |
| 3669 | } |
| 3670 | } |
| 3671 | /* Load register (literal) instructions decoding. */ |
| 3672 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x01) |
| 3673 | { |
| 3674 | if (record_debug) |
| 3675 | debug_printf ("Process record: load register (literal)\n"); |
| 3676 | if (vector_flag) |
| 3677 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3678 | else |
| 3679 | record_buf[0] = reg_rt; |
| 3680 | aarch64_insn_r->reg_rec_count = 1; |
| 3681 | } |
| 3682 | /* All types of load/store pair instructions decoding. */ |
| 3683 | else if ((insn_bits24_27 & 0x0a) == 0x08 && insn_bits28_29 == 0x02) |
| 3684 | { |
| 3685 | if (record_debug) |
| 3686 | debug_printf ("Process record: load/store pair\n"); |
| 3687 | |
| 3688 | if (ld_flag) |
| 3689 | { |
| 3690 | if (vector_flag) |
| 3691 | { |
| 3692 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3693 | record_buf[1] = reg_rt2 + AARCH64_V0_REGNUM; |
| 3694 | } |
| 3695 | else |
| 3696 | { |
| 3697 | record_buf[0] = reg_rt; |
| 3698 | record_buf[1] = reg_rt2; |
| 3699 | } |
| 3700 | aarch64_insn_r->reg_rec_count = 2; |
| 3701 | } |
| 3702 | else |
| 3703 | { |
| 3704 | uint16_t imm7_off; |
| 3705 | imm7_off = bits (aarch64_insn_r->aarch64_insn, 15, 21); |
| 3706 | if (!vector_flag) |
| 3707 | size_bits = size_bits >> 1; |
| 3708 | datasize = 8 << (2 + size_bits); |
| 3709 | offset = (imm7_off & 0x40) ? (~imm7_off & 0x007f) + 1 : imm7_off; |
| 3710 | offset = offset << (2 + size_bits); |
| 3711 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3712 | &address); |
| 3713 | if (!((insn_bits24_27 & 0x0b) == 0x08 && insn_bit23)) |
| 3714 | { |
| 3715 | if (imm7_off & 0x40) |
| 3716 | address = address - offset; |
| 3717 | else |
| 3718 | address = address + offset; |
| 3719 | } |
| 3720 | |
| 3721 | record_buf_mem[0] = datasize / 8; |
| 3722 | record_buf_mem[1] = address; |
| 3723 | record_buf_mem[2] = datasize / 8; |
| 3724 | record_buf_mem[3] = address + (datasize / 8); |
| 3725 | aarch64_insn_r->mem_rec_count = 2; |
| 3726 | } |
| 3727 | if (bit (aarch64_insn_r->aarch64_insn, 23)) |
| 3728 | record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn; |
| 3729 | } |
| 3730 | /* Load/store register (unsigned immediate) instructions. */ |
| 3731 | else if ((insn_bits24_27 & 0x0b) == 0x09 && insn_bits28_29 == 0x03) |
| 3732 | { |
| 3733 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3734 | if (!(opc >> 1)) |
| 3735 | { |
| 3736 | if (opc & 0x01) |
| 3737 | ld_flag = 0x01; |
| 3738 | else |
| 3739 | ld_flag = 0x0; |
| 3740 | } |
| 3741 | else |
| 3742 | { |
| 3743 | if (size_bits == 0x3 && vector_flag == 0x0 && opc == 0x2) |
| 3744 | { |
| 3745 | /* PRFM (immediate) */ |
| 3746 | return AARCH64_RECORD_SUCCESS; |
| 3747 | } |
| 3748 | else if (size_bits == 0x2 && vector_flag == 0x0 && opc == 0x2) |
| 3749 | { |
| 3750 | /* LDRSW (immediate) */ |
| 3751 | ld_flag = 0x1; |
| 3752 | } |
| 3753 | else |
| 3754 | { |
| 3755 | if (opc & 0x01) |
| 3756 | ld_flag = 0x01; |
| 3757 | else |
| 3758 | ld_flag = 0x0; |
| 3759 | } |
| 3760 | } |
| 3761 | |
| 3762 | if (record_debug) |
| 3763 | { |
| 3764 | debug_printf ("Process record: load/store (unsigned immediate):" |
| 3765 | " size %x V %d opc %x\n", size_bits, vector_flag, |
| 3766 | opc); |
| 3767 | } |
| 3768 | |
| 3769 | if (!ld_flag) |
| 3770 | { |
| 3771 | offset = bits (aarch64_insn_r->aarch64_insn, 10, 21); |
| 3772 | datasize = 8 << size_bits; |
| 3773 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3774 | &address); |
| 3775 | offset = offset << size_bits; |
| 3776 | address = address + offset; |
| 3777 | |
| 3778 | record_buf_mem[0] = datasize >> 3; |
| 3779 | record_buf_mem[1] = address; |
| 3780 | aarch64_insn_r->mem_rec_count = 1; |
| 3781 | } |
| 3782 | else |
| 3783 | { |
| 3784 | if (vector_flag) |
| 3785 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3786 | else |
| 3787 | record_buf[0] = reg_rt; |
| 3788 | aarch64_insn_r->reg_rec_count = 1; |
| 3789 | } |
| 3790 | } |
| 3791 | /* Load/store register (register offset) instructions. */ |
| 3792 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 |
| 3793 | && insn_bits10_11 == 0x02 && insn_bit21) |
| 3794 | { |
| 3795 | if (record_debug) |
| 3796 | debug_printf ("Process record: load/store (register offset)\n"); |
| 3797 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3798 | if (!(opc >> 1)) |
| 3799 | if (opc & 0x01) |
| 3800 | ld_flag = 0x01; |
| 3801 | else |
| 3802 | ld_flag = 0x0; |
| 3803 | else |
| 3804 | if (size_bits != 0x03) |
| 3805 | ld_flag = 0x01; |
| 3806 | else |
| 3807 | return AARCH64_RECORD_UNKNOWN; |
| 3808 | |
| 3809 | if (!ld_flag) |
| 3810 | { |
| 3811 | ULONGEST reg_rm_val; |
| 3812 | |
| 3813 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, |
| 3814 | bits (aarch64_insn_r->aarch64_insn, 16, 20), ®_rm_val); |
| 3815 | if (bit (aarch64_insn_r->aarch64_insn, 12)) |
| 3816 | offset = reg_rm_val << size_bits; |
| 3817 | else |
| 3818 | offset = reg_rm_val; |
| 3819 | datasize = 8 << size_bits; |
| 3820 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3821 | &address); |
| 3822 | address = address + offset; |
| 3823 | record_buf_mem[0] = datasize >> 3; |
| 3824 | record_buf_mem[1] = address; |
| 3825 | aarch64_insn_r->mem_rec_count = 1; |
| 3826 | } |
| 3827 | else |
| 3828 | { |
| 3829 | if (vector_flag) |
| 3830 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3831 | else |
| 3832 | record_buf[0] = reg_rt; |
| 3833 | aarch64_insn_r->reg_rec_count = 1; |
| 3834 | } |
| 3835 | } |
| 3836 | /* Load/store register (immediate and unprivileged) instructions. */ |
| 3837 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 |
| 3838 | && !insn_bit21) |
| 3839 | { |
| 3840 | if (record_debug) |
| 3841 | { |
| 3842 | debug_printf ("Process record: load/store " |
| 3843 | "(immediate and unprivileged)\n"); |
| 3844 | } |
| 3845 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3846 | if (!(opc >> 1)) |
| 3847 | if (opc & 0x01) |
| 3848 | ld_flag = 0x01; |
| 3849 | else |
| 3850 | ld_flag = 0x0; |
| 3851 | else |
| 3852 | if (size_bits != 0x03) |
| 3853 | ld_flag = 0x01; |
| 3854 | else |
| 3855 | return AARCH64_RECORD_UNKNOWN; |
| 3856 | |
| 3857 | if (!ld_flag) |
| 3858 | { |
| 3859 | uint16_t imm9_off; |
| 3860 | imm9_off = bits (aarch64_insn_r->aarch64_insn, 12, 20); |
| 3861 | offset = (imm9_off & 0x0100) ? (((~imm9_off) & 0x01ff) + 1) : imm9_off; |
| 3862 | datasize = 8 << size_bits; |
| 3863 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3864 | &address); |
| 3865 | if (insn_bits10_11 != 0x01) |
| 3866 | { |
| 3867 | if (imm9_off & 0x0100) |
| 3868 | address = address - offset; |
| 3869 | else |
| 3870 | address = address + offset; |
| 3871 | } |
| 3872 | record_buf_mem[0] = datasize >> 3; |
| 3873 | record_buf_mem[1] = address; |
| 3874 | aarch64_insn_r->mem_rec_count = 1; |
| 3875 | } |
| 3876 | else |
| 3877 | { |
| 3878 | if (vector_flag) |
| 3879 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3880 | else |
| 3881 | record_buf[0] = reg_rt; |
| 3882 | aarch64_insn_r->reg_rec_count = 1; |
| 3883 | } |
| 3884 | if (insn_bits10_11 == 0x01 || insn_bits10_11 == 0x03) |
| 3885 | record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn; |
| 3886 | } |
| 3887 | /* Advanced SIMD load/store instructions. */ |
| 3888 | else |
| 3889 | return aarch64_record_asimd_load_store (aarch64_insn_r); |
| 3890 | |
| 3891 | MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, |
| 3892 | record_buf_mem); |
| 3893 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3894 | record_buf); |
| 3895 | return AARCH64_RECORD_SUCCESS; |
| 3896 | } |
| 3897 | |
| 3898 | /* Record handler for data processing SIMD and floating point instructions. */ |
| 3899 | |
| 3900 | static unsigned int |
| 3901 | aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r) |
| 3902 | { |
| 3903 | uint8_t insn_bit21, opcode, rmode, reg_rd; |
| 3904 | uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15; |
| 3905 | uint8_t insn_bits11_14; |
| 3906 | uint32_t record_buf[2]; |
| 3907 | |
| 3908 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3909 | insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); |
| 3910 | insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3911 | insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3912 | insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14); |
| 3913 | opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18); |
| 3914 | rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20); |
| 3915 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3916 | insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); |
| 3917 | |
| 3918 | if (record_debug) |
| 3919 | debug_printf ("Process record: data processing SIMD/FP: "); |
| 3920 | |
| 3921 | if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e) |
| 3922 | { |
| 3923 | /* Floating point - fixed point conversion instructions. */ |
| 3924 | if (!insn_bit21) |
| 3925 | { |
| 3926 | if (record_debug) |
| 3927 | debug_printf ("FP - fixed point conversion"); |
| 3928 | |
| 3929 | if ((opcode >> 1) == 0x0 && rmode == 0x03) |
| 3930 | record_buf[0] = reg_rd; |
| 3931 | else |
| 3932 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3933 | } |
| 3934 | /* Floating point - conditional compare instructions. */ |
| 3935 | else if (insn_bits10_11 == 0x01) |
| 3936 | { |
| 3937 | if (record_debug) |
| 3938 | debug_printf ("FP - conditional compare"); |
| 3939 | |
| 3940 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3941 | } |
| 3942 | /* Floating point - data processing (2-source) and |
| 3943 | conditional select instructions. */ |
| 3944 | else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03) |
| 3945 | { |
| 3946 | if (record_debug) |
| 3947 | debug_printf ("FP - DP (2-source)"); |
| 3948 | |
| 3949 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3950 | } |
| 3951 | else if (insn_bits10_11 == 0x00) |
| 3952 | { |
| 3953 | /* Floating point - immediate instructions. */ |
| 3954 | if ((insn_bits12_15 & 0x01) == 0x01 |
| 3955 | || (insn_bits12_15 & 0x07) == 0x04) |
| 3956 | { |
| 3957 | if (record_debug) |
| 3958 | debug_printf ("FP - immediate"); |
| 3959 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3960 | } |
| 3961 | /* Floating point - compare instructions. */ |
| 3962 | else if ((insn_bits12_15 & 0x03) == 0x02) |
| 3963 | { |
| 3964 | if (record_debug) |
| 3965 | debug_printf ("FP - immediate"); |
| 3966 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3967 | } |
| 3968 | /* Floating point - integer conversions instructions. */ |
| 3969 | else if (insn_bits12_15 == 0x00) |
| 3970 | { |
| 3971 | /* Convert float to integer instruction. */ |
| 3972 | if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode)) |
| 3973 | { |
| 3974 | if (record_debug) |
| 3975 | debug_printf ("float to int conversion"); |
| 3976 | |
| 3977 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 3978 | } |
| 3979 | /* Convert integer to float instruction. */ |
| 3980 | else if ((opcode >> 1) == 0x01 && !rmode) |
| 3981 | { |
| 3982 | if (record_debug) |
| 3983 | debug_printf ("int to float conversion"); |
| 3984 | |
| 3985 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3986 | } |
| 3987 | /* Move float to integer instruction. */ |
| 3988 | else if ((opcode >> 1) == 0x03) |
| 3989 | { |
| 3990 | if (record_debug) |
| 3991 | debug_printf ("move float to int"); |
| 3992 | |
| 3993 | if (!(opcode & 0x01)) |
| 3994 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 3995 | else |
| 3996 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3997 | } |
| 3998 | else |
| 3999 | return AARCH64_RECORD_UNKNOWN; |
| 4000 | } |
| 4001 | else |
| 4002 | return AARCH64_RECORD_UNKNOWN; |
| 4003 | } |
| 4004 | else |
| 4005 | return AARCH64_RECORD_UNKNOWN; |
| 4006 | } |
| 4007 | else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0e) |
| 4008 | { |
| 4009 | if (record_debug) |
| 4010 | debug_printf ("SIMD copy"); |
| 4011 | |
| 4012 | /* Advanced SIMD copy instructions. */ |
| 4013 | if (!bits (aarch64_insn_r->aarch64_insn, 21, 23) |
| 4014 | && !bit (aarch64_insn_r->aarch64_insn, 15) |
| 4015 | && bit (aarch64_insn_r->aarch64_insn, 10)) |
| 4016 | { |
| 4017 | if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07) |
| 4018 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 4019 | else |
| 4020 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 4021 | } |
| 4022 | else |
| 4023 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 4024 | } |
| 4025 | /* All remaining floating point or advanced SIMD instructions. */ |
| 4026 | else |
| 4027 | { |
| 4028 | if (record_debug) |
| 4029 | debug_printf ("all remain"); |
| 4030 | |
| 4031 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 4032 | } |
| 4033 | |
| 4034 | if (record_debug) |
| 4035 | debug_printf ("\n"); |
| 4036 | |
| 4037 | aarch64_insn_r->reg_rec_count++; |
| 4038 | gdb_assert (aarch64_insn_r->reg_rec_count == 1); |
| 4039 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 4040 | record_buf); |
| 4041 | return AARCH64_RECORD_SUCCESS; |
| 4042 | } |
| 4043 | |
| 4044 | /* Decodes insns type and invokes its record handler. */ |
| 4045 | |
| 4046 | static unsigned int |
| 4047 | aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r) |
| 4048 | { |
| 4049 | uint32_t ins_bit25, ins_bit26, ins_bit27, ins_bit28; |
| 4050 | |
| 4051 | ins_bit25 = bit (aarch64_insn_r->aarch64_insn, 25); |
| 4052 | ins_bit26 = bit (aarch64_insn_r->aarch64_insn, 26); |
| 4053 | ins_bit27 = bit (aarch64_insn_r->aarch64_insn, 27); |
| 4054 | ins_bit28 = bit (aarch64_insn_r->aarch64_insn, 28); |
| 4055 | |
| 4056 | /* Data processing - immediate instructions. */ |
| 4057 | if (!ins_bit26 && !ins_bit27 && ins_bit28) |
| 4058 | return aarch64_record_data_proc_imm (aarch64_insn_r); |
| 4059 | |
| 4060 | /* Branch, exception generation and system instructions. */ |
| 4061 | if (ins_bit26 && !ins_bit27 && ins_bit28) |
| 4062 | return aarch64_record_branch_except_sys (aarch64_insn_r); |
| 4063 | |
| 4064 | /* Load and store instructions. */ |
| 4065 | if (!ins_bit25 && ins_bit27) |
| 4066 | return aarch64_record_load_store (aarch64_insn_r); |
| 4067 | |
| 4068 | /* Data processing - register instructions. */ |
| 4069 | if (ins_bit25 && !ins_bit26 && ins_bit27) |
| 4070 | return aarch64_record_data_proc_reg (aarch64_insn_r); |
| 4071 | |
| 4072 | /* Data processing - SIMD and floating point instructions. */ |
| 4073 | if (ins_bit25 && ins_bit26 && ins_bit27) |
| 4074 | return aarch64_record_data_proc_simd_fp (aarch64_insn_r); |
| 4075 | |
| 4076 | return AARCH64_RECORD_UNSUPPORTED; |
| 4077 | } |
| 4078 | |
| 4079 | /* Cleans up local record registers and memory allocations. */ |
| 4080 | |
| 4081 | static void |
| 4082 | deallocate_reg_mem (insn_decode_record *record) |
| 4083 | { |
| 4084 | xfree (record->aarch64_regs); |
| 4085 | xfree (record->aarch64_mems); |
| 4086 | } |
| 4087 | |
| 4088 | #if GDB_SELF_TEST |
| 4089 | namespace selftests { |
| 4090 | |
| 4091 | static void |
| 4092 | aarch64_process_record_test (void) |
| 4093 | { |
| 4094 | struct gdbarch_info info; |
| 4095 | uint32_t ret; |
| 4096 | |
| 4097 | gdbarch_info_init (&info); |
| 4098 | info.bfd_arch_info = bfd_scan_arch ("aarch64"); |
| 4099 | |
| 4100 | struct gdbarch *gdbarch = gdbarch_find_by_info (info); |
| 4101 | SELF_CHECK (gdbarch != NULL); |
| 4102 | |
| 4103 | insn_decode_record aarch64_record; |
| 4104 | |
| 4105 | memset (&aarch64_record, 0, sizeof (insn_decode_record)); |
| 4106 | aarch64_record.regcache = NULL; |
| 4107 | aarch64_record.this_addr = 0; |
| 4108 | aarch64_record.gdbarch = gdbarch; |
| 4109 | |
| 4110 | /* 20 00 80 f9 prfm pldl1keep, [x1] */ |
| 4111 | aarch64_record.aarch64_insn = 0xf9800020; |
| 4112 | ret = aarch64_record_decode_insn_handler (&aarch64_record); |
| 4113 | SELF_CHECK (ret == AARCH64_RECORD_SUCCESS); |
| 4114 | SELF_CHECK (aarch64_record.reg_rec_count == 0); |
| 4115 | SELF_CHECK (aarch64_record.mem_rec_count == 0); |
| 4116 | |
| 4117 | deallocate_reg_mem (&aarch64_record); |
| 4118 | } |
| 4119 | |
| 4120 | } // namespace selftests |
| 4121 | #endif /* GDB_SELF_TEST */ |
| 4122 | |
| 4123 | /* Parse the current instruction and record the values of the registers and |
| 4124 | memory that will be changed in current instruction to record_arch_list |
| 4125 | return -1 if something is wrong. */ |
| 4126 | |
| 4127 | int |
| 4128 | aarch64_process_record (struct gdbarch *gdbarch, struct regcache *regcache, |
| 4129 | CORE_ADDR insn_addr) |
| 4130 | { |
| 4131 | uint32_t rec_no = 0; |
| 4132 | uint8_t insn_size = 4; |
| 4133 | uint32_t ret = 0; |
| 4134 | gdb_byte buf[insn_size]; |
| 4135 | insn_decode_record aarch64_record; |
| 4136 | |
| 4137 | memset (&buf[0], 0, insn_size); |
| 4138 | memset (&aarch64_record, 0, sizeof (insn_decode_record)); |
| 4139 | target_read_memory (insn_addr, &buf[0], insn_size); |
| 4140 | aarch64_record.aarch64_insn |
| 4141 | = (uint32_t) extract_unsigned_integer (&buf[0], |
| 4142 | insn_size, |
| 4143 | gdbarch_byte_order (gdbarch)); |
| 4144 | aarch64_record.regcache = regcache; |
| 4145 | aarch64_record.this_addr = insn_addr; |
| 4146 | aarch64_record.gdbarch = gdbarch; |
| 4147 | |
| 4148 | ret = aarch64_record_decode_insn_handler (&aarch64_record); |
| 4149 | if (ret == AARCH64_RECORD_UNSUPPORTED) |
| 4150 | { |
| 4151 | printf_unfiltered (_("Process record does not support instruction " |
| 4152 | "0x%0x at address %s.\n"), |
| 4153 | aarch64_record.aarch64_insn, |
| 4154 | paddress (gdbarch, insn_addr)); |
| 4155 | ret = -1; |
| 4156 | } |
| 4157 | |
| 4158 | if (0 == ret) |
| 4159 | { |
| 4160 | /* Record registers. */ |
| 4161 | record_full_arch_list_add_reg (aarch64_record.regcache, |
| 4162 | AARCH64_PC_REGNUM); |
| 4163 | /* Always record register CPSR. */ |
| 4164 | record_full_arch_list_add_reg (aarch64_record.regcache, |
| 4165 | AARCH64_CPSR_REGNUM); |
| 4166 | if (aarch64_record.aarch64_regs) |
| 4167 | for (rec_no = 0; rec_no < aarch64_record.reg_rec_count; rec_no++) |
| 4168 | if (record_full_arch_list_add_reg (aarch64_record.regcache, |
| 4169 | aarch64_record.aarch64_regs[rec_no])) |
| 4170 | ret = -1; |
| 4171 | |
| 4172 | /* Record memories. */ |
| 4173 | if (aarch64_record.aarch64_mems) |
| 4174 | for (rec_no = 0; rec_no < aarch64_record.mem_rec_count; rec_no++) |
| 4175 | if (record_full_arch_list_add_mem |
| 4176 | ((CORE_ADDR)aarch64_record.aarch64_mems[rec_no].addr, |
| 4177 | aarch64_record.aarch64_mems[rec_no].len)) |
| 4178 | ret = -1; |
| 4179 | |
| 4180 | if (record_full_arch_list_add_end ()) |
| 4181 | ret = -1; |
| 4182 | } |
| 4183 | |
| 4184 | deallocate_reg_mem (&aarch64_record); |
| 4185 | return ret; |
| 4186 | } |