| 1 | /* Common target dependent code for GDB on AArch64 systems. |
| 2 | |
| 3 | Copyright (C) 2009-2015 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 "doublest.h" |
| 31 | #include "value.h" |
| 32 | #include "arch-utils.h" |
| 33 | #include "osabi.h" |
| 34 | #include "frame-unwind.h" |
| 35 | #include "frame-base.h" |
| 36 | #include "trad-frame.h" |
| 37 | #include "objfiles.h" |
| 38 | #include "dwarf2-frame.h" |
| 39 | #include "gdbtypes.h" |
| 40 | #include "prologue-value.h" |
| 41 | #include "target-descriptions.h" |
| 42 | #include "user-regs.h" |
| 43 | #include "language.h" |
| 44 | #include "infcall.h" |
| 45 | #include "ax.h" |
| 46 | #include "ax-gdb.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 | |
| 58 | #include "features/aarch64.c" |
| 59 | |
| 60 | /* Pseudo register base numbers. */ |
| 61 | #define AARCH64_Q0_REGNUM 0 |
| 62 | #define AARCH64_D0_REGNUM (AARCH64_Q0_REGNUM + 32) |
| 63 | #define AARCH64_S0_REGNUM (AARCH64_D0_REGNUM + 32) |
| 64 | #define AARCH64_H0_REGNUM (AARCH64_S0_REGNUM + 32) |
| 65 | #define AARCH64_B0_REGNUM (AARCH64_H0_REGNUM + 32) |
| 66 | |
| 67 | /* The standard register names, and all the valid aliases for them. */ |
| 68 | static const struct |
| 69 | { |
| 70 | const char *const name; |
| 71 | int regnum; |
| 72 | } aarch64_register_aliases[] = |
| 73 | { |
| 74 | /* 64-bit register names. */ |
| 75 | {"fp", AARCH64_FP_REGNUM}, |
| 76 | {"lr", AARCH64_LR_REGNUM}, |
| 77 | {"sp", AARCH64_SP_REGNUM}, |
| 78 | |
| 79 | /* 32-bit register names. */ |
| 80 | {"w0", AARCH64_X0_REGNUM + 0}, |
| 81 | {"w1", AARCH64_X0_REGNUM + 1}, |
| 82 | {"w2", AARCH64_X0_REGNUM + 2}, |
| 83 | {"w3", AARCH64_X0_REGNUM + 3}, |
| 84 | {"w4", AARCH64_X0_REGNUM + 4}, |
| 85 | {"w5", AARCH64_X0_REGNUM + 5}, |
| 86 | {"w6", AARCH64_X0_REGNUM + 6}, |
| 87 | {"w7", AARCH64_X0_REGNUM + 7}, |
| 88 | {"w8", AARCH64_X0_REGNUM + 8}, |
| 89 | {"w9", AARCH64_X0_REGNUM + 9}, |
| 90 | {"w10", AARCH64_X0_REGNUM + 10}, |
| 91 | {"w11", AARCH64_X0_REGNUM + 11}, |
| 92 | {"w12", AARCH64_X0_REGNUM + 12}, |
| 93 | {"w13", AARCH64_X0_REGNUM + 13}, |
| 94 | {"w14", AARCH64_X0_REGNUM + 14}, |
| 95 | {"w15", AARCH64_X0_REGNUM + 15}, |
| 96 | {"w16", AARCH64_X0_REGNUM + 16}, |
| 97 | {"w17", AARCH64_X0_REGNUM + 17}, |
| 98 | {"w18", AARCH64_X0_REGNUM + 18}, |
| 99 | {"w19", AARCH64_X0_REGNUM + 19}, |
| 100 | {"w20", AARCH64_X0_REGNUM + 20}, |
| 101 | {"w21", AARCH64_X0_REGNUM + 21}, |
| 102 | {"w22", AARCH64_X0_REGNUM + 22}, |
| 103 | {"w23", AARCH64_X0_REGNUM + 23}, |
| 104 | {"w24", AARCH64_X0_REGNUM + 24}, |
| 105 | {"w25", AARCH64_X0_REGNUM + 25}, |
| 106 | {"w26", AARCH64_X0_REGNUM + 26}, |
| 107 | {"w27", AARCH64_X0_REGNUM + 27}, |
| 108 | {"w28", AARCH64_X0_REGNUM + 28}, |
| 109 | {"w29", AARCH64_X0_REGNUM + 29}, |
| 110 | {"w30", AARCH64_X0_REGNUM + 30}, |
| 111 | |
| 112 | /* specials */ |
| 113 | {"ip0", AARCH64_X0_REGNUM + 16}, |
| 114 | {"ip1", AARCH64_X0_REGNUM + 17} |
| 115 | }; |
| 116 | |
| 117 | /* The required core 'R' registers. */ |
| 118 | static const char *const aarch64_r_register_names[] = |
| 119 | { |
| 120 | /* These registers must appear in consecutive RAW register number |
| 121 | order and they must begin with AARCH64_X0_REGNUM! */ |
| 122 | "x0", "x1", "x2", "x3", |
| 123 | "x4", "x5", "x6", "x7", |
| 124 | "x8", "x9", "x10", "x11", |
| 125 | "x12", "x13", "x14", "x15", |
| 126 | "x16", "x17", "x18", "x19", |
| 127 | "x20", "x21", "x22", "x23", |
| 128 | "x24", "x25", "x26", "x27", |
| 129 | "x28", "x29", "x30", "sp", |
| 130 | "pc", "cpsr" |
| 131 | }; |
| 132 | |
| 133 | /* The FP/SIMD 'V' registers. */ |
| 134 | static const char *const aarch64_v_register_names[] = |
| 135 | { |
| 136 | /* These registers must appear in consecutive RAW register number |
| 137 | order and they must begin with AARCH64_V0_REGNUM! */ |
| 138 | "v0", "v1", "v2", "v3", |
| 139 | "v4", "v5", "v6", "v7", |
| 140 | "v8", "v9", "v10", "v11", |
| 141 | "v12", "v13", "v14", "v15", |
| 142 | "v16", "v17", "v18", "v19", |
| 143 | "v20", "v21", "v22", "v23", |
| 144 | "v24", "v25", "v26", "v27", |
| 145 | "v28", "v29", "v30", "v31", |
| 146 | "fpsr", |
| 147 | "fpcr" |
| 148 | }; |
| 149 | |
| 150 | /* AArch64 prologue cache structure. */ |
| 151 | struct aarch64_prologue_cache |
| 152 | { |
| 153 | /* The program counter at the start of the function. It is used to |
| 154 | identify this frame as a prologue frame. */ |
| 155 | CORE_ADDR func; |
| 156 | |
| 157 | /* The program counter at the time this frame was created; i.e. where |
| 158 | this function was called from. It is used to identify this frame as a |
| 159 | stub frame. */ |
| 160 | CORE_ADDR prev_pc; |
| 161 | |
| 162 | /* The stack pointer at the time this frame was created; i.e. the |
| 163 | caller's stack pointer when this function was called. It is used |
| 164 | to identify this frame. */ |
| 165 | CORE_ADDR prev_sp; |
| 166 | |
| 167 | /* Is the target available to read from? */ |
| 168 | int available_p; |
| 169 | |
| 170 | /* The frame base for this frame is just prev_sp - frame size. |
| 171 | FRAMESIZE is the distance from the frame pointer to the |
| 172 | initial stack pointer. */ |
| 173 | int framesize; |
| 174 | |
| 175 | /* The register used to hold the frame pointer for this frame. */ |
| 176 | int framereg; |
| 177 | |
| 178 | /* Saved register offsets. */ |
| 179 | struct trad_frame_saved_reg *saved_regs; |
| 180 | }; |
| 181 | |
| 182 | /* Toggle this file's internal debugging dump. */ |
| 183 | static int aarch64_debug; |
| 184 | |
| 185 | static void |
| 186 | show_aarch64_debug (struct ui_file *file, int from_tty, |
| 187 | struct cmd_list_element *c, const char *value) |
| 188 | { |
| 189 | fprintf_filtered (file, _("AArch64 debugging is %s.\n"), value); |
| 190 | } |
| 191 | |
| 192 | /* Extract a signed value from a bit field within an instruction |
| 193 | encoding. |
| 194 | |
| 195 | INSN is the instruction opcode. |
| 196 | |
| 197 | WIDTH specifies the width of the bit field to extract (in bits). |
| 198 | |
| 199 | OFFSET specifies the least significant bit of the field where bits |
| 200 | are numbered zero counting from least to most significant. */ |
| 201 | |
| 202 | static int32_t |
| 203 | extract_signed_bitfield (uint32_t insn, unsigned width, unsigned offset) |
| 204 | { |
| 205 | unsigned shift_l = sizeof (int32_t) * 8 - (offset + width); |
| 206 | unsigned shift_r = sizeof (int32_t) * 8 - width; |
| 207 | |
| 208 | return ((int32_t) insn << shift_l) >> shift_r; |
| 209 | } |
| 210 | |
| 211 | /* Determine if specified bits within an instruction opcode matches a |
| 212 | specific pattern. |
| 213 | |
| 214 | INSN is the instruction opcode. |
| 215 | |
| 216 | MASK specifies the bits within the opcode that are to be tested |
| 217 | agsinst for a match with PATTERN. */ |
| 218 | |
| 219 | static int |
| 220 | decode_masked_match (uint32_t insn, uint32_t mask, uint32_t pattern) |
| 221 | { |
| 222 | return (insn & mask) == pattern; |
| 223 | } |
| 224 | |
| 225 | /* Decode an opcode if it represents an immediate ADD or SUB instruction. |
| 226 | |
| 227 | ADDR specifies the address of the opcode. |
| 228 | INSN specifies the opcode to test. |
| 229 | RD receives the 'rd' field from the decoded instruction. |
| 230 | RN receives the 'rn' field from the decoded instruction. |
| 231 | |
| 232 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 233 | static int |
| 234 | decode_add_sub_imm (CORE_ADDR addr, uint32_t insn, unsigned *rd, unsigned *rn, |
| 235 | int32_t *imm) |
| 236 | { |
| 237 | if ((insn & 0x9f000000) == 0x91000000) |
| 238 | { |
| 239 | unsigned shift; |
| 240 | unsigned op_is_sub; |
| 241 | |
| 242 | *rd = (insn >> 0) & 0x1f; |
| 243 | *rn = (insn >> 5) & 0x1f; |
| 244 | *imm = (insn >> 10) & 0xfff; |
| 245 | shift = (insn >> 22) & 0x3; |
| 246 | op_is_sub = (insn >> 30) & 0x1; |
| 247 | |
| 248 | switch (shift) |
| 249 | { |
| 250 | case 0: |
| 251 | break; |
| 252 | case 1: |
| 253 | *imm <<= 12; |
| 254 | break; |
| 255 | default: |
| 256 | /* UNDEFINED */ |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | if (op_is_sub) |
| 261 | *imm = -*imm; |
| 262 | |
| 263 | if (aarch64_debug) |
| 264 | fprintf_unfiltered (gdb_stdlog, |
| 265 | "decode: 0x%s 0x%x add x%u, x%u, #%d\n", |
| 266 | core_addr_to_string_nz (addr), insn, *rd, *rn, |
| 267 | *imm); |
| 268 | return 1; |
| 269 | } |
| 270 | return 0; |
| 271 | } |
| 272 | |
| 273 | /* Decode an opcode if it represents an ADRP instruction. |
| 274 | |
| 275 | ADDR specifies the address of the opcode. |
| 276 | INSN specifies the opcode to test. |
| 277 | RD receives the 'rd' field from the decoded instruction. |
| 278 | |
| 279 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 280 | |
| 281 | static int |
| 282 | decode_adrp (CORE_ADDR addr, uint32_t insn, unsigned *rd) |
| 283 | { |
| 284 | if (decode_masked_match (insn, 0x9f000000, 0x90000000)) |
| 285 | { |
| 286 | *rd = (insn >> 0) & 0x1f; |
| 287 | |
| 288 | if (aarch64_debug) |
| 289 | fprintf_unfiltered (gdb_stdlog, |
| 290 | "decode: 0x%s 0x%x adrp x%u, #?\n", |
| 291 | core_addr_to_string_nz (addr), insn, *rd); |
| 292 | return 1; |
| 293 | } |
| 294 | return 0; |
| 295 | } |
| 296 | |
| 297 | /* Decode an opcode if it represents an branch immediate or branch |
| 298 | and link immediate instruction. |
| 299 | |
| 300 | ADDR specifies the address of the opcode. |
| 301 | INSN specifies the opcode to test. |
| 302 | IS_BL receives the 'op' bit from the decoded instruction. |
| 303 | OFFSET receives the immediate offset from the decoded instruction. |
| 304 | |
| 305 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 306 | |
| 307 | static int |
| 308 | decode_b (CORE_ADDR addr, uint32_t insn, int *is_bl, int32_t *offset) |
| 309 | { |
| 310 | /* b 0001 01ii iiii iiii iiii iiii iiii iiii */ |
| 311 | /* bl 1001 01ii iiii iiii iiii iiii iiii iiii */ |
| 312 | if (decode_masked_match (insn, 0x7c000000, 0x14000000)) |
| 313 | { |
| 314 | *is_bl = (insn >> 31) & 0x1; |
| 315 | *offset = extract_signed_bitfield (insn, 26, 0) << 2; |
| 316 | |
| 317 | if (aarch64_debug) |
| 318 | fprintf_unfiltered (gdb_stdlog, |
| 319 | "decode: 0x%s 0x%x %s 0x%s\n", |
| 320 | core_addr_to_string_nz (addr), insn, |
| 321 | *is_bl ? "bl" : "b", |
| 322 | core_addr_to_string_nz (addr + *offset)); |
| 323 | |
| 324 | return 1; |
| 325 | } |
| 326 | return 0; |
| 327 | } |
| 328 | |
| 329 | /* Decode an opcode if it represents a conditional branch instruction. |
| 330 | |
| 331 | ADDR specifies the address of the opcode. |
| 332 | INSN specifies the opcode to test. |
| 333 | COND receives the branch condition field from the decoded |
| 334 | instruction. |
| 335 | OFFSET receives the immediate offset from the decoded instruction. |
| 336 | |
| 337 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 338 | |
| 339 | static int |
| 340 | decode_bcond (CORE_ADDR addr, uint32_t insn, unsigned *cond, int32_t *offset) |
| 341 | { |
| 342 | /* b.cond 0101 0100 iiii iiii iiii iiii iii0 cccc */ |
| 343 | if (decode_masked_match (insn, 0xff000010, 0x54000000)) |
| 344 | { |
| 345 | *cond = (insn >> 0) & 0xf; |
| 346 | *offset = extract_signed_bitfield (insn, 19, 5) << 2; |
| 347 | |
| 348 | if (aarch64_debug) |
| 349 | fprintf_unfiltered (gdb_stdlog, |
| 350 | "decode: 0x%s 0x%x b<%u> 0x%s\n", |
| 351 | core_addr_to_string_nz (addr), insn, *cond, |
| 352 | core_addr_to_string_nz (addr + *offset)); |
| 353 | return 1; |
| 354 | } |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | /* Decode an opcode if it represents a branch via register instruction. |
| 359 | |
| 360 | ADDR specifies the address of the opcode. |
| 361 | INSN specifies the opcode to test. |
| 362 | IS_BLR receives the 'op' bit from the decoded instruction. |
| 363 | RN receives the 'rn' field from the decoded instruction. |
| 364 | |
| 365 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 366 | |
| 367 | static int |
| 368 | decode_br (CORE_ADDR addr, uint32_t insn, int *is_blr, unsigned *rn) |
| 369 | { |
| 370 | /* 8 4 0 6 2 8 4 0 */ |
| 371 | /* blr 110101100011111100000000000rrrrr */ |
| 372 | /* br 110101100001111100000000000rrrrr */ |
| 373 | if (decode_masked_match (insn, 0xffdffc1f, 0xd61f0000)) |
| 374 | { |
| 375 | *is_blr = (insn >> 21) & 1; |
| 376 | *rn = (insn >> 5) & 0x1f; |
| 377 | |
| 378 | if (aarch64_debug) |
| 379 | fprintf_unfiltered (gdb_stdlog, |
| 380 | "decode: 0x%s 0x%x %s 0x%x\n", |
| 381 | core_addr_to_string_nz (addr), insn, |
| 382 | *is_blr ? "blr" : "br", *rn); |
| 383 | |
| 384 | return 1; |
| 385 | } |
| 386 | return 0; |
| 387 | } |
| 388 | |
| 389 | /* Decode an opcode if it represents a CBZ or CBNZ instruction. |
| 390 | |
| 391 | ADDR specifies the address of the opcode. |
| 392 | INSN specifies the opcode to test. |
| 393 | IS64 receives the 'sf' field from the decoded instruction. |
| 394 | IS_CBNZ receives the 'op' field from the decoded instruction. |
| 395 | RN receives the 'rn' field from the decoded instruction. |
| 396 | OFFSET receives the 'imm19' field from the decoded instruction. |
| 397 | |
| 398 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 399 | |
| 400 | static int |
| 401 | decode_cb (CORE_ADDR addr, uint32_t insn, int *is64, int *is_cbnz, |
| 402 | unsigned *rn, int32_t *offset) |
| 403 | { |
| 404 | /* cbz T011 010o iiii iiii iiii iiii iiir rrrr */ |
| 405 | /* cbnz T011 010o iiii iiii iiii iiii iiir rrrr */ |
| 406 | if (decode_masked_match (insn, 0x7e000000, 0x34000000)) |
| 407 | { |
| 408 | *rn = (insn >> 0) & 0x1f; |
| 409 | *is64 = (insn >> 31) & 0x1; |
| 410 | *is_cbnz = (insn >> 24) & 0x1; |
| 411 | *offset = extract_signed_bitfield (insn, 19, 5) << 2; |
| 412 | |
| 413 | if (aarch64_debug) |
| 414 | fprintf_unfiltered (gdb_stdlog, |
| 415 | "decode: 0x%s 0x%x %s 0x%s\n", |
| 416 | core_addr_to_string_nz (addr), insn, |
| 417 | *is_cbnz ? "cbnz" : "cbz", |
| 418 | core_addr_to_string_nz (addr + *offset)); |
| 419 | return 1; |
| 420 | } |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | /* Decode an opcode if it represents a ERET instruction. |
| 425 | |
| 426 | ADDR specifies the address of the opcode. |
| 427 | INSN specifies the opcode to test. |
| 428 | |
| 429 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 430 | |
| 431 | static int |
| 432 | decode_eret (CORE_ADDR addr, uint32_t insn) |
| 433 | { |
| 434 | /* eret 1101 0110 1001 1111 0000 0011 1110 0000 */ |
| 435 | if (insn == 0xd69f03e0) |
| 436 | { |
| 437 | if (aarch64_debug) |
| 438 | fprintf_unfiltered (gdb_stdlog, "decode: 0x%s 0x%x eret\n", |
| 439 | core_addr_to_string_nz (addr), insn); |
| 440 | return 1; |
| 441 | } |
| 442 | return 0; |
| 443 | } |
| 444 | |
| 445 | /* Decode an opcode if it represents a MOVZ instruction. |
| 446 | |
| 447 | ADDR specifies the address of the opcode. |
| 448 | INSN specifies the opcode to test. |
| 449 | RD receives the 'rd' field from the decoded instruction. |
| 450 | |
| 451 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 452 | |
| 453 | static int |
| 454 | decode_movz (CORE_ADDR addr, uint32_t insn, unsigned *rd) |
| 455 | { |
| 456 | if (decode_masked_match (insn, 0xff800000, 0x52800000)) |
| 457 | { |
| 458 | *rd = (insn >> 0) & 0x1f; |
| 459 | |
| 460 | if (aarch64_debug) |
| 461 | fprintf_unfiltered (gdb_stdlog, |
| 462 | "decode: 0x%s 0x%x movz x%u, #?\n", |
| 463 | core_addr_to_string_nz (addr), insn, *rd); |
| 464 | return 1; |
| 465 | } |
| 466 | return 0; |
| 467 | } |
| 468 | |
| 469 | /* Decode an opcode if it represents a ORR (shifted register) |
| 470 | instruction. |
| 471 | |
| 472 | ADDR specifies the address of the opcode. |
| 473 | INSN specifies the opcode to test. |
| 474 | RD receives the 'rd' field from the decoded instruction. |
| 475 | RN receives the 'rn' field from the decoded instruction. |
| 476 | RM receives the 'rm' field from the decoded instruction. |
| 477 | IMM receives the 'imm6' field from the decoded instruction. |
| 478 | |
| 479 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 480 | |
| 481 | static int |
| 482 | decode_orr_shifted_register_x (CORE_ADDR addr, |
| 483 | uint32_t insn, unsigned *rd, unsigned *rn, |
| 484 | unsigned *rm, int32_t *imm) |
| 485 | { |
| 486 | if (decode_masked_match (insn, 0xff200000, 0xaa000000)) |
| 487 | { |
| 488 | *rd = (insn >> 0) & 0x1f; |
| 489 | *rn = (insn >> 5) & 0x1f; |
| 490 | *rm = (insn >> 16) & 0x1f; |
| 491 | *imm = (insn >> 10) & 0x3f; |
| 492 | |
| 493 | if (aarch64_debug) |
| 494 | fprintf_unfiltered (gdb_stdlog, |
| 495 | "decode: 0x%s 0x%x orr x%u, x%u, x%u, #%u\n", |
| 496 | core_addr_to_string_nz (addr), insn, *rd, |
| 497 | *rn, *rm, *imm); |
| 498 | return 1; |
| 499 | } |
| 500 | return 0; |
| 501 | } |
| 502 | |
| 503 | /* Decode an opcode if it represents a RET instruction. |
| 504 | |
| 505 | ADDR specifies the address of the opcode. |
| 506 | INSN specifies the opcode to test. |
| 507 | RN receives the 'rn' field from the decoded instruction. |
| 508 | |
| 509 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 510 | |
| 511 | static int |
| 512 | decode_ret (CORE_ADDR addr, uint32_t insn, unsigned *rn) |
| 513 | { |
| 514 | if (decode_masked_match (insn, 0xfffffc1f, 0xd65f0000)) |
| 515 | { |
| 516 | *rn = (insn >> 5) & 0x1f; |
| 517 | if (aarch64_debug) |
| 518 | fprintf_unfiltered (gdb_stdlog, |
| 519 | "decode: 0x%s 0x%x ret x%u\n", |
| 520 | core_addr_to_string_nz (addr), insn, *rn); |
| 521 | return 1; |
| 522 | } |
| 523 | return 0; |
| 524 | } |
| 525 | |
| 526 | /* Decode an opcode if it represents the following instruction: |
| 527 | STP rt, rt2, [rn, #imm] |
| 528 | |
| 529 | ADDR specifies the address of the opcode. |
| 530 | INSN specifies the opcode to test. |
| 531 | RT1 receives the 'rt' field from the decoded instruction. |
| 532 | RT2 receives the 'rt2' field from the decoded instruction. |
| 533 | RN receives the 'rn' field from the decoded instruction. |
| 534 | IMM receives the 'imm' field from the decoded instruction. |
| 535 | |
| 536 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 537 | |
| 538 | static int |
| 539 | decode_stp_offset (CORE_ADDR addr, |
| 540 | uint32_t insn, |
| 541 | unsigned *rt1, unsigned *rt2, unsigned *rn, int32_t *imm) |
| 542 | { |
| 543 | if (decode_masked_match (insn, 0xffc00000, 0xa9000000)) |
| 544 | { |
| 545 | *rt1 = (insn >> 0) & 0x1f; |
| 546 | *rn = (insn >> 5) & 0x1f; |
| 547 | *rt2 = (insn >> 10) & 0x1f; |
| 548 | *imm = extract_signed_bitfield (insn, 7, 15); |
| 549 | *imm <<= 3; |
| 550 | |
| 551 | if (aarch64_debug) |
| 552 | fprintf_unfiltered (gdb_stdlog, |
| 553 | "decode: 0x%s 0x%x stp x%u, x%u, [x%u + #%d]\n", |
| 554 | core_addr_to_string_nz (addr), insn, |
| 555 | *rt1, *rt2, *rn, *imm); |
| 556 | return 1; |
| 557 | } |
| 558 | return 0; |
| 559 | } |
| 560 | |
| 561 | /* Decode an opcode if it represents the following instruction: |
| 562 | STP rt, rt2, [rn, #imm]! |
| 563 | |
| 564 | ADDR specifies the address of the opcode. |
| 565 | INSN specifies the opcode to test. |
| 566 | RT1 receives the 'rt' field from the decoded instruction. |
| 567 | RT2 receives the 'rt2' field from the decoded instruction. |
| 568 | RN receives the 'rn' field from the decoded instruction. |
| 569 | IMM receives the 'imm' field from the decoded instruction. |
| 570 | |
| 571 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 572 | |
| 573 | static int |
| 574 | decode_stp_offset_wb (CORE_ADDR addr, |
| 575 | uint32_t insn, |
| 576 | unsigned *rt1, unsigned *rt2, unsigned *rn, |
| 577 | int32_t *imm) |
| 578 | { |
| 579 | if (decode_masked_match (insn, 0xffc00000, 0xa9800000)) |
| 580 | { |
| 581 | *rt1 = (insn >> 0) & 0x1f; |
| 582 | *rn = (insn >> 5) & 0x1f; |
| 583 | *rt2 = (insn >> 10) & 0x1f; |
| 584 | *imm = extract_signed_bitfield (insn, 7, 15); |
| 585 | *imm <<= 3; |
| 586 | |
| 587 | if (aarch64_debug) |
| 588 | fprintf_unfiltered (gdb_stdlog, |
| 589 | "decode: 0x%s 0x%x stp x%u, x%u, [x%u + #%d]!\n", |
| 590 | core_addr_to_string_nz (addr), insn, |
| 591 | *rt1, *rt2, *rn, *imm); |
| 592 | return 1; |
| 593 | } |
| 594 | return 0; |
| 595 | } |
| 596 | |
| 597 | /* Decode an opcode if it represents the following instruction: |
| 598 | STUR rt, [rn, #imm] |
| 599 | |
| 600 | ADDR specifies the address of the opcode. |
| 601 | INSN specifies the opcode to test. |
| 602 | IS64 receives size field from the decoded instruction. |
| 603 | RT receives the 'rt' field from the decoded instruction. |
| 604 | RN receives the 'rn' field from the decoded instruction. |
| 605 | IMM receives the 'imm' field from the decoded instruction. |
| 606 | |
| 607 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 608 | |
| 609 | static int |
| 610 | decode_stur (CORE_ADDR addr, uint32_t insn, int *is64, unsigned *rt, |
| 611 | unsigned *rn, int32_t *imm) |
| 612 | { |
| 613 | if (decode_masked_match (insn, 0xbfe00c00, 0xb8000000)) |
| 614 | { |
| 615 | *is64 = (insn >> 30) & 1; |
| 616 | *rt = (insn >> 0) & 0x1f; |
| 617 | *rn = (insn >> 5) & 0x1f; |
| 618 | *imm = extract_signed_bitfield (insn, 9, 12); |
| 619 | |
| 620 | if (aarch64_debug) |
| 621 | fprintf_unfiltered (gdb_stdlog, |
| 622 | "decode: 0x%s 0x%x stur %c%u, [x%u + #%d]\n", |
| 623 | core_addr_to_string_nz (addr), insn, |
| 624 | *is64 ? 'x' : 'w', *rt, *rn, *imm); |
| 625 | return 1; |
| 626 | } |
| 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | /* Decode an opcode if it represents a TBZ or TBNZ instruction. |
| 631 | |
| 632 | ADDR specifies the address of the opcode. |
| 633 | INSN specifies the opcode to test. |
| 634 | IS_TBNZ receives the 'op' field from the decoded instruction. |
| 635 | BIT receives the bit position field from the decoded instruction. |
| 636 | RT receives 'rt' field from the decoded instruction. |
| 637 | IMM receives 'imm' field from the decoded instruction. |
| 638 | |
| 639 | Return 1 if the opcodes matches and is decoded, otherwise 0. */ |
| 640 | |
| 641 | static int |
| 642 | decode_tb (CORE_ADDR addr, uint32_t insn, int *is_tbnz, unsigned *bit, |
| 643 | unsigned *rt, int32_t *imm) |
| 644 | { |
| 645 | /* tbz b011 0110 bbbb biii iiii iiii iiir rrrr */ |
| 646 | /* tbnz B011 0111 bbbb biii iiii iiii iiir rrrr */ |
| 647 | if (decode_masked_match (insn, 0x7e000000, 0x36000000)) |
| 648 | { |
| 649 | *rt = (insn >> 0) & 0x1f; |
| 650 | *is_tbnz = (insn >> 24) & 0x1; |
| 651 | *bit = ((insn >> (31 - 4)) & 0x20) | ((insn >> 19) & 0x1f); |
| 652 | *imm = extract_signed_bitfield (insn, 14, 5) << 2; |
| 653 | |
| 654 | if (aarch64_debug) |
| 655 | fprintf_unfiltered (gdb_stdlog, |
| 656 | "decode: 0x%s 0x%x %s x%u, #%u, 0x%s\n", |
| 657 | core_addr_to_string_nz (addr), insn, |
| 658 | *is_tbnz ? "tbnz" : "tbz", *rt, *bit, |
| 659 | core_addr_to_string_nz (addr + *imm)); |
| 660 | return 1; |
| 661 | } |
| 662 | return 0; |
| 663 | } |
| 664 | |
| 665 | /* Analyze a prologue, looking for a recognizable stack frame |
| 666 | and frame pointer. Scan until we encounter a store that could |
| 667 | clobber the stack frame unexpectedly, or an unknown instruction. */ |
| 668 | |
| 669 | static CORE_ADDR |
| 670 | aarch64_analyze_prologue (struct gdbarch *gdbarch, |
| 671 | CORE_ADDR start, CORE_ADDR limit, |
| 672 | struct aarch64_prologue_cache *cache) |
| 673 | { |
| 674 | enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch); |
| 675 | int i; |
| 676 | pv_t regs[AARCH64_X_REGISTER_COUNT]; |
| 677 | struct pv_area *stack; |
| 678 | struct cleanup *back_to; |
| 679 | |
| 680 | for (i = 0; i < AARCH64_X_REGISTER_COUNT; i++) |
| 681 | regs[i] = pv_register (i, 0); |
| 682 | stack = make_pv_area (AARCH64_SP_REGNUM, gdbarch_addr_bit (gdbarch)); |
| 683 | back_to = make_cleanup_free_pv_area (stack); |
| 684 | |
| 685 | for (; start < limit; start += 4) |
| 686 | { |
| 687 | uint32_t insn; |
| 688 | unsigned rd; |
| 689 | unsigned rn; |
| 690 | unsigned rm; |
| 691 | unsigned rt; |
| 692 | unsigned rt1; |
| 693 | unsigned rt2; |
| 694 | int op_is_sub; |
| 695 | int32_t imm; |
| 696 | unsigned cond; |
| 697 | int is64; |
| 698 | int is_link; |
| 699 | int is_cbnz; |
| 700 | int is_tbnz; |
| 701 | unsigned bit; |
| 702 | int32_t offset; |
| 703 | |
| 704 | insn = read_memory_unsigned_integer (start, 4, byte_order_for_code); |
| 705 | |
| 706 | if (decode_add_sub_imm (start, insn, &rd, &rn, &imm)) |
| 707 | regs[rd] = pv_add_constant (regs[rn], imm); |
| 708 | else if (decode_adrp (start, insn, &rd)) |
| 709 | regs[rd] = pv_unknown (); |
| 710 | else if (decode_b (start, insn, &is_link, &offset)) |
| 711 | { |
| 712 | /* Stop analysis on branch. */ |
| 713 | break; |
| 714 | } |
| 715 | else if (decode_bcond (start, insn, &cond, &offset)) |
| 716 | { |
| 717 | /* Stop analysis on branch. */ |
| 718 | break; |
| 719 | } |
| 720 | else if (decode_br (start, insn, &is_link, &rn)) |
| 721 | { |
| 722 | /* Stop analysis on branch. */ |
| 723 | break; |
| 724 | } |
| 725 | else if (decode_cb (start, insn, &is64, &is_cbnz, &rn, &offset)) |
| 726 | { |
| 727 | /* Stop analysis on branch. */ |
| 728 | break; |
| 729 | } |
| 730 | else if (decode_eret (start, insn)) |
| 731 | { |
| 732 | /* Stop analysis on branch. */ |
| 733 | break; |
| 734 | } |
| 735 | else if (decode_movz (start, insn, &rd)) |
| 736 | regs[rd] = pv_unknown (); |
| 737 | else |
| 738 | if (decode_orr_shifted_register_x (start, insn, &rd, &rn, &rm, &imm)) |
| 739 | { |
| 740 | if (imm == 0 && rn == 31) |
| 741 | regs[rd] = regs[rm]; |
| 742 | else |
| 743 | { |
| 744 | if (aarch64_debug) |
| 745 | fprintf_unfiltered |
| 746 | (gdb_stdlog, |
| 747 | "aarch64: prologue analysis gave up addr=0x%s " |
| 748 | "opcode=0x%x (orr x register)\n", |
| 749 | core_addr_to_string_nz (start), |
| 750 | insn); |
| 751 | break; |
| 752 | } |
| 753 | } |
| 754 | else if (decode_ret (start, insn, &rn)) |
| 755 | { |
| 756 | /* Stop analysis on branch. */ |
| 757 | break; |
| 758 | } |
| 759 | else if (decode_stur (start, insn, &is64, &rt, &rn, &offset)) |
| 760 | { |
| 761 | pv_area_store (stack, pv_add_constant (regs[rn], offset), |
| 762 | is64 ? 8 : 4, regs[rt]); |
| 763 | } |
| 764 | else if (decode_stp_offset (start, insn, &rt1, &rt2, &rn, &imm)) |
| 765 | { |
| 766 | /* If recording this store would invalidate the store area |
| 767 | (perhaps because rn is not known) then we should abandon |
| 768 | further prologue analysis. */ |
| 769 | if (pv_area_store_would_trash (stack, |
| 770 | pv_add_constant (regs[rn], imm))) |
| 771 | break; |
| 772 | |
| 773 | if (pv_area_store_would_trash (stack, |
| 774 | pv_add_constant (regs[rn], imm + 8))) |
| 775 | break; |
| 776 | |
| 777 | pv_area_store (stack, pv_add_constant (regs[rn], imm), 8, |
| 778 | regs[rt1]); |
| 779 | pv_area_store (stack, pv_add_constant (regs[rn], imm + 8), 8, |
| 780 | regs[rt2]); |
| 781 | } |
| 782 | else if (decode_stp_offset_wb (start, insn, &rt1, &rt2, &rn, &imm)) |
| 783 | { |
| 784 | /* If recording this store would invalidate the store area |
| 785 | (perhaps because rn is not known) then we should abandon |
| 786 | further prologue analysis. */ |
| 787 | if (pv_area_store_would_trash (stack, |
| 788 | pv_add_constant (regs[rn], imm))) |
| 789 | break; |
| 790 | |
| 791 | if (pv_area_store_would_trash (stack, |
| 792 | pv_add_constant (regs[rn], imm + 8))) |
| 793 | break; |
| 794 | |
| 795 | pv_area_store (stack, pv_add_constant (regs[rn], imm), 8, |
| 796 | regs[rt1]); |
| 797 | pv_area_store (stack, pv_add_constant (regs[rn], imm + 8), 8, |
| 798 | regs[rt2]); |
| 799 | regs[rn] = pv_add_constant (regs[rn], imm); |
| 800 | } |
| 801 | else if (decode_tb (start, insn, &is_tbnz, &bit, &rn, &offset)) |
| 802 | { |
| 803 | /* Stop analysis on branch. */ |
| 804 | break; |
| 805 | } |
| 806 | else |
| 807 | { |
| 808 | if (aarch64_debug) |
| 809 | fprintf_unfiltered (gdb_stdlog, |
| 810 | "aarch64: prologue analysis gave up addr=0x%s" |
| 811 | " opcode=0x%x\n", |
| 812 | core_addr_to_string_nz (start), insn); |
| 813 | break; |
| 814 | } |
| 815 | } |
| 816 | |
| 817 | if (cache == NULL) |
| 818 | { |
| 819 | do_cleanups (back_to); |
| 820 | return start; |
| 821 | } |
| 822 | |
| 823 | if (pv_is_register (regs[AARCH64_FP_REGNUM], AARCH64_SP_REGNUM)) |
| 824 | { |
| 825 | /* Frame pointer is fp. Frame size is constant. */ |
| 826 | cache->framereg = AARCH64_FP_REGNUM; |
| 827 | cache->framesize = -regs[AARCH64_FP_REGNUM].k; |
| 828 | } |
| 829 | else if (pv_is_register (regs[AARCH64_SP_REGNUM], AARCH64_SP_REGNUM)) |
| 830 | { |
| 831 | /* Try the stack pointer. */ |
| 832 | cache->framesize = -regs[AARCH64_SP_REGNUM].k; |
| 833 | cache->framereg = AARCH64_SP_REGNUM; |
| 834 | } |
| 835 | else |
| 836 | { |
| 837 | /* We're just out of luck. We don't know where the frame is. */ |
| 838 | cache->framereg = -1; |
| 839 | cache->framesize = 0; |
| 840 | } |
| 841 | |
| 842 | for (i = 0; i < AARCH64_X_REGISTER_COUNT; i++) |
| 843 | { |
| 844 | CORE_ADDR offset; |
| 845 | |
| 846 | if (pv_area_find_reg (stack, gdbarch, i, &offset)) |
| 847 | cache->saved_regs[i].addr = offset; |
| 848 | } |
| 849 | |
| 850 | do_cleanups (back_to); |
| 851 | return start; |
| 852 | } |
| 853 | |
| 854 | /* Implement the "skip_prologue" gdbarch method. */ |
| 855 | |
| 856 | static CORE_ADDR |
| 857 | aarch64_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 858 | { |
| 859 | unsigned long inst; |
| 860 | CORE_ADDR skip_pc; |
| 861 | CORE_ADDR func_addr, limit_pc; |
| 862 | struct symtab_and_line sal; |
| 863 | |
| 864 | /* See if we can determine the end of the prologue via the symbol |
| 865 | table. If so, then return either PC, or the PC after the |
| 866 | prologue, whichever is greater. */ |
| 867 | if (find_pc_partial_function (pc, NULL, &func_addr, NULL)) |
| 868 | { |
| 869 | CORE_ADDR post_prologue_pc |
| 870 | = skip_prologue_using_sal (gdbarch, func_addr); |
| 871 | |
| 872 | if (post_prologue_pc != 0) |
| 873 | return max (pc, post_prologue_pc); |
| 874 | } |
| 875 | |
| 876 | /* Can't determine prologue from the symbol table, need to examine |
| 877 | instructions. */ |
| 878 | |
| 879 | /* Find an upper limit on the function prologue using the debug |
| 880 | information. If the debug information could not be used to |
| 881 | provide that bound, then use an arbitrary large number as the |
| 882 | upper bound. */ |
| 883 | limit_pc = skip_prologue_using_sal (gdbarch, pc); |
| 884 | if (limit_pc == 0) |
| 885 | limit_pc = pc + 128; /* Magic. */ |
| 886 | |
| 887 | /* Try disassembling prologue. */ |
| 888 | return aarch64_analyze_prologue (gdbarch, pc, limit_pc, NULL); |
| 889 | } |
| 890 | |
| 891 | /* Scan the function prologue for THIS_FRAME and populate the prologue |
| 892 | cache CACHE. */ |
| 893 | |
| 894 | static void |
| 895 | aarch64_scan_prologue (struct frame_info *this_frame, |
| 896 | struct aarch64_prologue_cache *cache) |
| 897 | { |
| 898 | CORE_ADDR block_addr = get_frame_address_in_block (this_frame); |
| 899 | CORE_ADDR prologue_start; |
| 900 | CORE_ADDR prologue_end; |
| 901 | CORE_ADDR prev_pc = get_frame_pc (this_frame); |
| 902 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 903 | |
| 904 | cache->prev_pc = prev_pc; |
| 905 | |
| 906 | /* Assume we do not find a frame. */ |
| 907 | cache->framereg = -1; |
| 908 | cache->framesize = 0; |
| 909 | |
| 910 | if (find_pc_partial_function (block_addr, NULL, &prologue_start, |
| 911 | &prologue_end)) |
| 912 | { |
| 913 | struct symtab_and_line sal = find_pc_line (prologue_start, 0); |
| 914 | |
| 915 | if (sal.line == 0) |
| 916 | { |
| 917 | /* No line info so use the current PC. */ |
| 918 | prologue_end = prev_pc; |
| 919 | } |
| 920 | else if (sal.end < prologue_end) |
| 921 | { |
| 922 | /* The next line begins after the function end. */ |
| 923 | prologue_end = sal.end; |
| 924 | } |
| 925 | |
| 926 | prologue_end = min (prologue_end, prev_pc); |
| 927 | aarch64_analyze_prologue (gdbarch, prologue_start, prologue_end, cache); |
| 928 | } |
| 929 | else |
| 930 | { |
| 931 | CORE_ADDR frame_loc; |
| 932 | LONGEST saved_fp; |
| 933 | LONGEST saved_lr; |
| 934 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 935 | |
| 936 | frame_loc = get_frame_register_unsigned (this_frame, AARCH64_FP_REGNUM); |
| 937 | if (frame_loc == 0) |
| 938 | return; |
| 939 | |
| 940 | cache->framereg = AARCH64_FP_REGNUM; |
| 941 | cache->framesize = 16; |
| 942 | cache->saved_regs[29].addr = 0; |
| 943 | cache->saved_regs[30].addr = 8; |
| 944 | } |
| 945 | } |
| 946 | |
| 947 | /* Fill in *CACHE with information about the prologue of *THIS_FRAME. This |
| 948 | function may throw an exception if the inferior's registers or memory is |
| 949 | not available. */ |
| 950 | |
| 951 | static void |
| 952 | aarch64_make_prologue_cache_1 (struct frame_info *this_frame, |
| 953 | struct aarch64_prologue_cache *cache) |
| 954 | { |
| 955 | CORE_ADDR unwound_fp; |
| 956 | int reg; |
| 957 | |
| 958 | aarch64_scan_prologue (this_frame, cache); |
| 959 | |
| 960 | if (cache->framereg == -1) |
| 961 | return; |
| 962 | |
| 963 | unwound_fp = get_frame_register_unsigned (this_frame, cache->framereg); |
| 964 | if (unwound_fp == 0) |
| 965 | return; |
| 966 | |
| 967 | cache->prev_sp = unwound_fp + cache->framesize; |
| 968 | |
| 969 | /* Calculate actual addresses of saved registers using offsets |
| 970 | determined by aarch64_analyze_prologue. */ |
| 971 | for (reg = 0; reg < gdbarch_num_regs (get_frame_arch (this_frame)); reg++) |
| 972 | if (trad_frame_addr_p (cache->saved_regs, reg)) |
| 973 | cache->saved_regs[reg].addr += cache->prev_sp; |
| 974 | |
| 975 | cache->func = get_frame_func (this_frame); |
| 976 | |
| 977 | cache->available_p = 1; |
| 978 | } |
| 979 | |
| 980 | /* Allocate and fill in *THIS_CACHE with information about the prologue of |
| 981 | *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated. |
| 982 | Return a pointer to the current aarch64_prologue_cache in |
| 983 | *THIS_CACHE. */ |
| 984 | |
| 985 | static struct aarch64_prologue_cache * |
| 986 | aarch64_make_prologue_cache (struct frame_info *this_frame, void **this_cache) |
| 987 | { |
| 988 | struct aarch64_prologue_cache *cache; |
| 989 | |
| 990 | if (*this_cache != NULL) |
| 991 | return *this_cache; |
| 992 | |
| 993 | cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache); |
| 994 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
| 995 | *this_cache = cache; |
| 996 | |
| 997 | TRY |
| 998 | { |
| 999 | aarch64_make_prologue_cache_1 (this_frame, cache); |
| 1000 | } |
| 1001 | CATCH (ex, RETURN_MASK_ERROR) |
| 1002 | { |
| 1003 | if (ex.error != NOT_AVAILABLE_ERROR) |
| 1004 | throw_exception (ex); |
| 1005 | } |
| 1006 | END_CATCH |
| 1007 | |
| 1008 | return cache; |
| 1009 | } |
| 1010 | |
| 1011 | /* Implement the "stop_reason" frame_unwind method. */ |
| 1012 | |
| 1013 | static enum unwind_stop_reason |
| 1014 | aarch64_prologue_frame_unwind_stop_reason (struct frame_info *this_frame, |
| 1015 | void **this_cache) |
| 1016 | { |
| 1017 | struct aarch64_prologue_cache *cache |
| 1018 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 1019 | |
| 1020 | if (!cache->available_p) |
| 1021 | return UNWIND_UNAVAILABLE; |
| 1022 | |
| 1023 | /* Halt the backtrace at "_start". */ |
| 1024 | if (cache->prev_pc <= gdbarch_tdep (get_frame_arch (this_frame))->lowest_pc) |
| 1025 | return UNWIND_OUTERMOST; |
| 1026 | |
| 1027 | /* We've hit a wall, stop. */ |
| 1028 | if (cache->prev_sp == 0) |
| 1029 | return UNWIND_OUTERMOST; |
| 1030 | |
| 1031 | return UNWIND_NO_REASON; |
| 1032 | } |
| 1033 | |
| 1034 | /* Our frame ID for a normal frame is the current function's starting |
| 1035 | PC and the caller's SP when we were called. */ |
| 1036 | |
| 1037 | static void |
| 1038 | aarch64_prologue_this_id (struct frame_info *this_frame, |
| 1039 | void **this_cache, struct frame_id *this_id) |
| 1040 | { |
| 1041 | struct aarch64_prologue_cache *cache |
| 1042 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 1043 | |
| 1044 | if (!cache->available_p) |
| 1045 | *this_id = frame_id_build_unavailable_stack (cache->func); |
| 1046 | else |
| 1047 | *this_id = frame_id_build (cache->prev_sp, cache->func); |
| 1048 | } |
| 1049 | |
| 1050 | /* Implement the "prev_register" frame_unwind method. */ |
| 1051 | |
| 1052 | static struct value * |
| 1053 | aarch64_prologue_prev_register (struct frame_info *this_frame, |
| 1054 | void **this_cache, int prev_regnum) |
| 1055 | { |
| 1056 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1057 | struct aarch64_prologue_cache *cache |
| 1058 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 1059 | |
| 1060 | /* If we are asked to unwind the PC, then we need to return the LR |
| 1061 | instead. The prologue may save PC, but it will point into this |
| 1062 | frame's prologue, not the next frame's resume location. */ |
| 1063 | if (prev_regnum == AARCH64_PC_REGNUM) |
| 1064 | { |
| 1065 | CORE_ADDR lr; |
| 1066 | |
| 1067 | lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM); |
| 1068 | return frame_unwind_got_constant (this_frame, prev_regnum, lr); |
| 1069 | } |
| 1070 | |
| 1071 | /* SP is generally not saved to the stack, but this frame is |
| 1072 | identified by the next frame's stack pointer at the time of the |
| 1073 | call. The value was already reconstructed into PREV_SP. */ |
| 1074 | /* |
| 1075 | +----------+ ^ |
| 1076 | | saved lr | | |
| 1077 | +->| saved fp |--+ |
| 1078 | | | | |
| 1079 | | | | <- Previous SP |
| 1080 | | +----------+ |
| 1081 | | | saved lr | |
| 1082 | +--| saved fp |<- FP |
| 1083 | | | |
| 1084 | | |<- SP |
| 1085 | +----------+ */ |
| 1086 | if (prev_regnum == AARCH64_SP_REGNUM) |
| 1087 | return frame_unwind_got_constant (this_frame, prev_regnum, |
| 1088 | cache->prev_sp); |
| 1089 | |
| 1090 | return trad_frame_get_prev_register (this_frame, cache->saved_regs, |
| 1091 | prev_regnum); |
| 1092 | } |
| 1093 | |
| 1094 | /* AArch64 prologue unwinder. */ |
| 1095 | struct frame_unwind aarch64_prologue_unwind = |
| 1096 | { |
| 1097 | NORMAL_FRAME, |
| 1098 | aarch64_prologue_frame_unwind_stop_reason, |
| 1099 | aarch64_prologue_this_id, |
| 1100 | aarch64_prologue_prev_register, |
| 1101 | NULL, |
| 1102 | default_frame_sniffer |
| 1103 | }; |
| 1104 | |
| 1105 | /* Allocate and fill in *THIS_CACHE with information about the prologue of |
| 1106 | *THIS_FRAME. Do not do this is if *THIS_CACHE was already allocated. |
| 1107 | Return a pointer to the current aarch64_prologue_cache in |
| 1108 | *THIS_CACHE. */ |
| 1109 | |
| 1110 | static struct aarch64_prologue_cache * |
| 1111 | aarch64_make_stub_cache (struct frame_info *this_frame, void **this_cache) |
| 1112 | { |
| 1113 | struct aarch64_prologue_cache *cache; |
| 1114 | |
| 1115 | if (*this_cache != NULL) |
| 1116 | return *this_cache; |
| 1117 | |
| 1118 | cache = FRAME_OBSTACK_ZALLOC (struct aarch64_prologue_cache); |
| 1119 | cache->saved_regs = trad_frame_alloc_saved_regs (this_frame); |
| 1120 | *this_cache = cache; |
| 1121 | |
| 1122 | TRY |
| 1123 | { |
| 1124 | cache->prev_sp = get_frame_register_unsigned (this_frame, |
| 1125 | AARCH64_SP_REGNUM); |
| 1126 | cache->prev_pc = get_frame_pc (this_frame); |
| 1127 | cache->available_p = 1; |
| 1128 | } |
| 1129 | CATCH (ex, RETURN_MASK_ERROR) |
| 1130 | { |
| 1131 | if (ex.error != NOT_AVAILABLE_ERROR) |
| 1132 | throw_exception (ex); |
| 1133 | } |
| 1134 | END_CATCH |
| 1135 | |
| 1136 | return cache; |
| 1137 | } |
| 1138 | |
| 1139 | /* Implement the "stop_reason" frame_unwind method. */ |
| 1140 | |
| 1141 | static enum unwind_stop_reason |
| 1142 | aarch64_stub_frame_unwind_stop_reason (struct frame_info *this_frame, |
| 1143 | void **this_cache) |
| 1144 | { |
| 1145 | struct aarch64_prologue_cache *cache |
| 1146 | = aarch64_make_stub_cache (this_frame, this_cache); |
| 1147 | |
| 1148 | if (!cache->available_p) |
| 1149 | return UNWIND_UNAVAILABLE; |
| 1150 | |
| 1151 | return UNWIND_NO_REASON; |
| 1152 | } |
| 1153 | |
| 1154 | /* Our frame ID for a stub frame is the current SP and LR. */ |
| 1155 | |
| 1156 | static void |
| 1157 | aarch64_stub_this_id (struct frame_info *this_frame, |
| 1158 | void **this_cache, struct frame_id *this_id) |
| 1159 | { |
| 1160 | struct aarch64_prologue_cache *cache |
| 1161 | = aarch64_make_stub_cache (this_frame, this_cache); |
| 1162 | |
| 1163 | if (cache->available_p) |
| 1164 | *this_id = frame_id_build (cache->prev_sp, cache->prev_pc); |
| 1165 | else |
| 1166 | *this_id = frame_id_build_unavailable_stack (cache->prev_pc); |
| 1167 | } |
| 1168 | |
| 1169 | /* Implement the "sniffer" frame_unwind method. */ |
| 1170 | |
| 1171 | static int |
| 1172 | aarch64_stub_unwind_sniffer (const struct frame_unwind *self, |
| 1173 | struct frame_info *this_frame, |
| 1174 | void **this_prologue_cache) |
| 1175 | { |
| 1176 | CORE_ADDR addr_in_block; |
| 1177 | gdb_byte dummy[4]; |
| 1178 | |
| 1179 | addr_in_block = get_frame_address_in_block (this_frame); |
| 1180 | if (in_plt_section (addr_in_block) |
| 1181 | /* We also use the stub winder if the target memory is unreadable |
| 1182 | to avoid having the prologue unwinder trying to read it. */ |
| 1183 | || target_read_memory (get_frame_pc (this_frame), dummy, 4) != 0) |
| 1184 | return 1; |
| 1185 | |
| 1186 | return 0; |
| 1187 | } |
| 1188 | |
| 1189 | /* AArch64 stub unwinder. */ |
| 1190 | struct frame_unwind aarch64_stub_unwind = |
| 1191 | { |
| 1192 | NORMAL_FRAME, |
| 1193 | aarch64_stub_frame_unwind_stop_reason, |
| 1194 | aarch64_stub_this_id, |
| 1195 | aarch64_prologue_prev_register, |
| 1196 | NULL, |
| 1197 | aarch64_stub_unwind_sniffer |
| 1198 | }; |
| 1199 | |
| 1200 | /* Return the frame base address of *THIS_FRAME. */ |
| 1201 | |
| 1202 | static CORE_ADDR |
| 1203 | aarch64_normal_frame_base (struct frame_info *this_frame, void **this_cache) |
| 1204 | { |
| 1205 | struct aarch64_prologue_cache *cache |
| 1206 | = aarch64_make_prologue_cache (this_frame, this_cache); |
| 1207 | |
| 1208 | return cache->prev_sp - cache->framesize; |
| 1209 | } |
| 1210 | |
| 1211 | /* AArch64 default frame base information. */ |
| 1212 | struct frame_base aarch64_normal_base = |
| 1213 | { |
| 1214 | &aarch64_prologue_unwind, |
| 1215 | aarch64_normal_frame_base, |
| 1216 | aarch64_normal_frame_base, |
| 1217 | aarch64_normal_frame_base |
| 1218 | }; |
| 1219 | |
| 1220 | /* Assuming THIS_FRAME is a dummy, return the frame ID of that |
| 1221 | dummy frame. The frame ID's base needs to match the TOS value |
| 1222 | saved by save_dummy_frame_tos () and returned from |
| 1223 | aarch64_push_dummy_call, and the PC needs to match the dummy |
| 1224 | frame's breakpoint. */ |
| 1225 | |
| 1226 | static struct frame_id |
| 1227 | aarch64_dummy_id (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1228 | { |
| 1229 | return frame_id_build (get_frame_register_unsigned (this_frame, |
| 1230 | AARCH64_SP_REGNUM), |
| 1231 | get_frame_pc (this_frame)); |
| 1232 | } |
| 1233 | |
| 1234 | /* Implement the "unwind_pc" gdbarch method. */ |
| 1235 | |
| 1236 | static CORE_ADDR |
| 1237 | aarch64_unwind_pc (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1238 | { |
| 1239 | CORE_ADDR pc |
| 1240 | = frame_unwind_register_unsigned (this_frame, AARCH64_PC_REGNUM); |
| 1241 | |
| 1242 | return pc; |
| 1243 | } |
| 1244 | |
| 1245 | /* Implement the "unwind_sp" gdbarch method. */ |
| 1246 | |
| 1247 | static CORE_ADDR |
| 1248 | aarch64_unwind_sp (struct gdbarch *gdbarch, struct frame_info *this_frame) |
| 1249 | { |
| 1250 | return frame_unwind_register_unsigned (this_frame, AARCH64_SP_REGNUM); |
| 1251 | } |
| 1252 | |
| 1253 | /* Return the value of the REGNUM register in the previous frame of |
| 1254 | *THIS_FRAME. */ |
| 1255 | |
| 1256 | static struct value * |
| 1257 | aarch64_dwarf2_prev_register (struct frame_info *this_frame, |
| 1258 | void **this_cache, int regnum) |
| 1259 | { |
| 1260 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 1261 | CORE_ADDR lr; |
| 1262 | |
| 1263 | switch (regnum) |
| 1264 | { |
| 1265 | case AARCH64_PC_REGNUM: |
| 1266 | lr = frame_unwind_register_unsigned (this_frame, AARCH64_LR_REGNUM); |
| 1267 | return frame_unwind_got_constant (this_frame, regnum, lr); |
| 1268 | |
| 1269 | default: |
| 1270 | internal_error (__FILE__, __LINE__, |
| 1271 | _("Unexpected register %d"), regnum); |
| 1272 | } |
| 1273 | } |
| 1274 | |
| 1275 | /* Implement the "init_reg" dwarf2_frame_ops method. */ |
| 1276 | |
| 1277 | static void |
| 1278 | aarch64_dwarf2_frame_init_reg (struct gdbarch *gdbarch, int regnum, |
| 1279 | struct dwarf2_frame_state_reg *reg, |
| 1280 | struct frame_info *this_frame) |
| 1281 | { |
| 1282 | switch (regnum) |
| 1283 | { |
| 1284 | case AARCH64_PC_REGNUM: |
| 1285 | reg->how = DWARF2_FRAME_REG_FN; |
| 1286 | reg->loc.fn = aarch64_dwarf2_prev_register; |
| 1287 | break; |
| 1288 | case AARCH64_SP_REGNUM: |
| 1289 | reg->how = DWARF2_FRAME_REG_CFA; |
| 1290 | break; |
| 1291 | } |
| 1292 | } |
| 1293 | |
| 1294 | /* When arguments must be pushed onto the stack, they go on in reverse |
| 1295 | order. The code below implements a FILO (stack) to do this. */ |
| 1296 | |
| 1297 | typedef struct |
| 1298 | { |
| 1299 | /* Value to pass on stack. */ |
| 1300 | const void *data; |
| 1301 | |
| 1302 | /* Size in bytes of value to pass on stack. */ |
| 1303 | int len; |
| 1304 | } stack_item_t; |
| 1305 | |
| 1306 | DEF_VEC_O (stack_item_t); |
| 1307 | |
| 1308 | /* Return the alignment (in bytes) of the given type. */ |
| 1309 | |
| 1310 | static int |
| 1311 | aarch64_type_align (struct type *t) |
| 1312 | { |
| 1313 | int n; |
| 1314 | int align; |
| 1315 | int falign; |
| 1316 | |
| 1317 | t = check_typedef (t); |
| 1318 | switch (TYPE_CODE (t)) |
| 1319 | { |
| 1320 | default: |
| 1321 | /* Should never happen. */ |
| 1322 | internal_error (__FILE__, __LINE__, _("unknown type alignment")); |
| 1323 | return 4; |
| 1324 | |
| 1325 | case TYPE_CODE_PTR: |
| 1326 | case TYPE_CODE_ENUM: |
| 1327 | case TYPE_CODE_INT: |
| 1328 | case TYPE_CODE_FLT: |
| 1329 | case TYPE_CODE_SET: |
| 1330 | case TYPE_CODE_RANGE: |
| 1331 | case TYPE_CODE_BITSTRING: |
| 1332 | case TYPE_CODE_REF: |
| 1333 | case TYPE_CODE_CHAR: |
| 1334 | case TYPE_CODE_BOOL: |
| 1335 | return TYPE_LENGTH (t); |
| 1336 | |
| 1337 | case TYPE_CODE_ARRAY: |
| 1338 | case TYPE_CODE_COMPLEX: |
| 1339 | return aarch64_type_align (TYPE_TARGET_TYPE (t)); |
| 1340 | |
| 1341 | case TYPE_CODE_STRUCT: |
| 1342 | case TYPE_CODE_UNION: |
| 1343 | align = 1; |
| 1344 | for (n = 0; n < TYPE_NFIELDS (t); n++) |
| 1345 | { |
| 1346 | falign = aarch64_type_align (TYPE_FIELD_TYPE (t, n)); |
| 1347 | if (falign > align) |
| 1348 | align = falign; |
| 1349 | } |
| 1350 | return align; |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | /* Return 1 if *TY is a homogeneous floating-point aggregate as |
| 1355 | defined in the AAPCS64 ABI document; otherwise return 0. */ |
| 1356 | |
| 1357 | static int |
| 1358 | is_hfa (struct type *ty) |
| 1359 | { |
| 1360 | switch (TYPE_CODE (ty)) |
| 1361 | { |
| 1362 | case TYPE_CODE_ARRAY: |
| 1363 | { |
| 1364 | struct type *target_ty = TYPE_TARGET_TYPE (ty); |
| 1365 | if (TYPE_CODE (target_ty) == TYPE_CODE_FLT && TYPE_LENGTH (ty) <= 4) |
| 1366 | return 1; |
| 1367 | break; |
| 1368 | } |
| 1369 | |
| 1370 | case TYPE_CODE_UNION: |
| 1371 | case TYPE_CODE_STRUCT: |
| 1372 | { |
| 1373 | if (TYPE_NFIELDS (ty) > 0 && TYPE_NFIELDS (ty) <= 4) |
| 1374 | { |
| 1375 | struct type *member0_type; |
| 1376 | |
| 1377 | member0_type = check_typedef (TYPE_FIELD_TYPE (ty, 0)); |
| 1378 | if (TYPE_CODE (member0_type) == TYPE_CODE_FLT) |
| 1379 | { |
| 1380 | int i; |
| 1381 | |
| 1382 | for (i = 0; i < TYPE_NFIELDS (ty); i++) |
| 1383 | { |
| 1384 | struct type *member1_type; |
| 1385 | |
| 1386 | member1_type = check_typedef (TYPE_FIELD_TYPE (ty, i)); |
| 1387 | if (TYPE_CODE (member0_type) != TYPE_CODE (member1_type) |
| 1388 | || (TYPE_LENGTH (member0_type) |
| 1389 | != TYPE_LENGTH (member1_type))) |
| 1390 | return 0; |
| 1391 | } |
| 1392 | return 1; |
| 1393 | } |
| 1394 | } |
| 1395 | return 0; |
| 1396 | } |
| 1397 | |
| 1398 | default: |
| 1399 | break; |
| 1400 | } |
| 1401 | |
| 1402 | return 0; |
| 1403 | } |
| 1404 | |
| 1405 | /* AArch64 function call information structure. */ |
| 1406 | struct aarch64_call_info |
| 1407 | { |
| 1408 | /* the current argument number. */ |
| 1409 | unsigned argnum; |
| 1410 | |
| 1411 | /* The next general purpose register number, equivalent to NGRN as |
| 1412 | described in the AArch64 Procedure Call Standard. */ |
| 1413 | unsigned ngrn; |
| 1414 | |
| 1415 | /* The next SIMD and floating point register number, equivalent to |
| 1416 | NSRN as described in the AArch64 Procedure Call Standard. */ |
| 1417 | unsigned nsrn; |
| 1418 | |
| 1419 | /* The next stacked argument address, equivalent to NSAA as |
| 1420 | described in the AArch64 Procedure Call Standard. */ |
| 1421 | unsigned nsaa; |
| 1422 | |
| 1423 | /* Stack item vector. */ |
| 1424 | VEC(stack_item_t) *si; |
| 1425 | }; |
| 1426 | |
| 1427 | /* Pass a value in a sequence of consecutive X registers. The caller |
| 1428 | is responsbile for ensuring sufficient registers are available. */ |
| 1429 | |
| 1430 | static void |
| 1431 | pass_in_x (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1432 | struct aarch64_call_info *info, struct type *type, |
| 1433 | const bfd_byte *buf) |
| 1434 | { |
| 1435 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1436 | int len = TYPE_LENGTH (type); |
| 1437 | enum type_code typecode = TYPE_CODE (type); |
| 1438 | int regnum = AARCH64_X0_REGNUM + info->ngrn; |
| 1439 | |
| 1440 | info->argnum++; |
| 1441 | |
| 1442 | while (len > 0) |
| 1443 | { |
| 1444 | int partial_len = len < X_REGISTER_SIZE ? len : X_REGISTER_SIZE; |
| 1445 | CORE_ADDR regval = extract_unsigned_integer (buf, partial_len, |
| 1446 | byte_order); |
| 1447 | |
| 1448 | |
| 1449 | /* Adjust sub-word struct/union args when big-endian. */ |
| 1450 | if (byte_order == BFD_ENDIAN_BIG |
| 1451 | && partial_len < X_REGISTER_SIZE |
| 1452 | && (typecode == TYPE_CODE_STRUCT || typecode == TYPE_CODE_UNION)) |
| 1453 | regval <<= ((X_REGISTER_SIZE - partial_len) * TARGET_CHAR_BIT); |
| 1454 | |
| 1455 | if (aarch64_debug) |
| 1456 | fprintf_unfiltered (gdb_stdlog, "arg %d in %s = 0x%s\n", |
| 1457 | info->argnum, |
| 1458 | gdbarch_register_name (gdbarch, regnum), |
| 1459 | phex (regval, X_REGISTER_SIZE)); |
| 1460 | regcache_cooked_write_unsigned (regcache, regnum, regval); |
| 1461 | len -= partial_len; |
| 1462 | buf += partial_len; |
| 1463 | regnum++; |
| 1464 | } |
| 1465 | } |
| 1466 | |
| 1467 | /* Attempt to marshall a value in a V register. Return 1 if |
| 1468 | successful, or 0 if insufficient registers are available. This |
| 1469 | function, unlike the equivalent pass_in_x() function does not |
| 1470 | handle arguments spread across multiple registers. */ |
| 1471 | |
| 1472 | static int |
| 1473 | pass_in_v (struct gdbarch *gdbarch, |
| 1474 | struct regcache *regcache, |
| 1475 | struct aarch64_call_info *info, |
| 1476 | const bfd_byte *buf) |
| 1477 | { |
| 1478 | if (info->nsrn < 8) |
| 1479 | { |
| 1480 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1481 | int regnum = AARCH64_V0_REGNUM + info->nsrn; |
| 1482 | |
| 1483 | info->argnum++; |
| 1484 | info->nsrn++; |
| 1485 | |
| 1486 | regcache_cooked_write (regcache, regnum, buf); |
| 1487 | if (aarch64_debug) |
| 1488 | fprintf_unfiltered (gdb_stdlog, "arg %d in %s\n", |
| 1489 | info->argnum, |
| 1490 | gdbarch_register_name (gdbarch, regnum)); |
| 1491 | return 1; |
| 1492 | } |
| 1493 | info->nsrn = 8; |
| 1494 | return 0; |
| 1495 | } |
| 1496 | |
| 1497 | /* Marshall an argument onto the stack. */ |
| 1498 | |
| 1499 | static void |
| 1500 | pass_on_stack (struct aarch64_call_info *info, struct type *type, |
| 1501 | const bfd_byte *buf) |
| 1502 | { |
| 1503 | int len = TYPE_LENGTH (type); |
| 1504 | int align; |
| 1505 | stack_item_t item; |
| 1506 | |
| 1507 | info->argnum++; |
| 1508 | |
| 1509 | align = aarch64_type_align (type); |
| 1510 | |
| 1511 | /* PCS C.17 Stack should be aligned to the larger of 8 bytes or the |
| 1512 | Natural alignment of the argument's type. */ |
| 1513 | align = align_up (align, 8); |
| 1514 | |
| 1515 | /* The AArch64 PCS requires at most doubleword alignment. */ |
| 1516 | if (align > 16) |
| 1517 | align = 16; |
| 1518 | |
| 1519 | if (aarch64_debug) |
| 1520 | fprintf_unfiltered (gdb_stdlog, "arg %d len=%d @ sp + %d\n", |
| 1521 | info->argnum, len, info->nsaa); |
| 1522 | |
| 1523 | item.len = len; |
| 1524 | item.data = buf; |
| 1525 | VEC_safe_push (stack_item_t, info->si, &item); |
| 1526 | |
| 1527 | info->nsaa += len; |
| 1528 | if (info->nsaa & (align - 1)) |
| 1529 | { |
| 1530 | /* Push stack alignment padding. */ |
| 1531 | int pad = align - (info->nsaa & (align - 1)); |
| 1532 | |
| 1533 | item.len = pad; |
| 1534 | item.data = buf; |
| 1535 | |
| 1536 | VEC_safe_push (stack_item_t, info->si, &item); |
| 1537 | info->nsaa += pad; |
| 1538 | } |
| 1539 | } |
| 1540 | |
| 1541 | /* Marshall an argument into a sequence of one or more consecutive X |
| 1542 | registers or, if insufficient X registers are available then onto |
| 1543 | the stack. */ |
| 1544 | |
| 1545 | static void |
| 1546 | pass_in_x_or_stack (struct gdbarch *gdbarch, struct regcache *regcache, |
| 1547 | struct aarch64_call_info *info, struct type *type, |
| 1548 | const bfd_byte *buf) |
| 1549 | { |
| 1550 | int len = TYPE_LENGTH (type); |
| 1551 | int nregs = (len + X_REGISTER_SIZE - 1) / X_REGISTER_SIZE; |
| 1552 | |
| 1553 | /* PCS C.13 - Pass in registers if we have enough spare */ |
| 1554 | if (info->ngrn + nregs <= 8) |
| 1555 | { |
| 1556 | pass_in_x (gdbarch, regcache, info, type, buf); |
| 1557 | info->ngrn += nregs; |
| 1558 | } |
| 1559 | else |
| 1560 | { |
| 1561 | info->ngrn = 8; |
| 1562 | pass_on_stack (info, type, buf); |
| 1563 | } |
| 1564 | } |
| 1565 | |
| 1566 | /* Pass a value in a V register, or on the stack if insufficient are |
| 1567 | available. */ |
| 1568 | |
| 1569 | static void |
| 1570 | pass_in_v_or_stack (struct gdbarch *gdbarch, |
| 1571 | struct regcache *regcache, |
| 1572 | struct aarch64_call_info *info, |
| 1573 | struct type *type, |
| 1574 | const bfd_byte *buf) |
| 1575 | { |
| 1576 | if (!pass_in_v (gdbarch, regcache, info, buf)) |
| 1577 | pass_on_stack (info, type, buf); |
| 1578 | } |
| 1579 | |
| 1580 | /* Implement the "push_dummy_call" gdbarch method. */ |
| 1581 | |
| 1582 | static CORE_ADDR |
| 1583 | aarch64_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
| 1584 | struct regcache *regcache, CORE_ADDR bp_addr, |
| 1585 | int nargs, |
| 1586 | struct value **args, CORE_ADDR sp, int struct_return, |
| 1587 | CORE_ADDR struct_addr) |
| 1588 | { |
| 1589 | int nstack = 0; |
| 1590 | int argnum; |
| 1591 | int x_argreg; |
| 1592 | int v_argreg; |
| 1593 | struct aarch64_call_info info; |
| 1594 | struct type *func_type; |
| 1595 | struct type *return_type; |
| 1596 | int lang_struct_return; |
| 1597 | |
| 1598 | memset (&info, 0, sizeof (info)); |
| 1599 | |
| 1600 | /* We need to know what the type of the called function is in order |
| 1601 | to determine the number of named/anonymous arguments for the |
| 1602 | actual argument placement, and the return type in order to handle |
| 1603 | return value correctly. |
| 1604 | |
| 1605 | The generic code above us views the decision of return in memory |
| 1606 | or return in registers as a two stage processes. The language |
| 1607 | handler is consulted first and may decide to return in memory (eg |
| 1608 | class with copy constructor returned by value), this will cause |
| 1609 | the generic code to allocate space AND insert an initial leading |
| 1610 | argument. |
| 1611 | |
| 1612 | If the language code does not decide to pass in memory then the |
| 1613 | target code is consulted. |
| 1614 | |
| 1615 | If the language code decides to pass in memory we want to move |
| 1616 | the pointer inserted as the initial argument from the argument |
| 1617 | list and into X8, the conventional AArch64 struct return pointer |
| 1618 | register. |
| 1619 | |
| 1620 | This is slightly awkward, ideally the flag "lang_struct_return" |
| 1621 | would be passed to the targets implementation of push_dummy_call. |
| 1622 | Rather that change the target interface we call the language code |
| 1623 | directly ourselves. */ |
| 1624 | |
| 1625 | func_type = check_typedef (value_type (function)); |
| 1626 | |
| 1627 | /* Dereference function pointer types. */ |
| 1628 | if (TYPE_CODE (func_type) == TYPE_CODE_PTR) |
| 1629 | func_type = TYPE_TARGET_TYPE (func_type); |
| 1630 | |
| 1631 | gdb_assert (TYPE_CODE (func_type) == TYPE_CODE_FUNC |
| 1632 | || TYPE_CODE (func_type) == TYPE_CODE_METHOD); |
| 1633 | |
| 1634 | /* If language_pass_by_reference () returned true we will have been |
| 1635 | given an additional initial argument, a hidden pointer to the |
| 1636 | return slot in memory. */ |
| 1637 | return_type = TYPE_TARGET_TYPE (func_type); |
| 1638 | lang_struct_return = language_pass_by_reference (return_type); |
| 1639 | |
| 1640 | /* Set the return address. For the AArch64, the return breakpoint |
| 1641 | is always at BP_ADDR. */ |
| 1642 | regcache_cooked_write_unsigned (regcache, AARCH64_LR_REGNUM, bp_addr); |
| 1643 | |
| 1644 | /* If we were given an initial argument for the return slot because |
| 1645 | lang_struct_return was true, lose it. */ |
| 1646 | if (lang_struct_return) |
| 1647 | { |
| 1648 | args++; |
| 1649 | nargs--; |
| 1650 | } |
| 1651 | |
| 1652 | /* The struct_return pointer occupies X8. */ |
| 1653 | if (struct_return || lang_struct_return) |
| 1654 | { |
| 1655 | if (aarch64_debug) |
| 1656 | fprintf_unfiltered (gdb_stdlog, "struct return in %s = 0x%s\n", |
| 1657 | gdbarch_register_name |
| 1658 | (gdbarch, |
| 1659 | AARCH64_STRUCT_RETURN_REGNUM), |
| 1660 | paddress (gdbarch, struct_addr)); |
| 1661 | regcache_cooked_write_unsigned (regcache, AARCH64_STRUCT_RETURN_REGNUM, |
| 1662 | struct_addr); |
| 1663 | } |
| 1664 | |
| 1665 | for (argnum = 0; argnum < nargs; argnum++) |
| 1666 | { |
| 1667 | struct value *arg = args[argnum]; |
| 1668 | struct type *arg_type; |
| 1669 | int len; |
| 1670 | |
| 1671 | arg_type = check_typedef (value_type (arg)); |
| 1672 | len = TYPE_LENGTH (arg_type); |
| 1673 | |
| 1674 | switch (TYPE_CODE (arg_type)) |
| 1675 | { |
| 1676 | case TYPE_CODE_INT: |
| 1677 | case TYPE_CODE_BOOL: |
| 1678 | case TYPE_CODE_CHAR: |
| 1679 | case TYPE_CODE_RANGE: |
| 1680 | case TYPE_CODE_ENUM: |
| 1681 | if (len < 4) |
| 1682 | { |
| 1683 | /* Promote to 32 bit integer. */ |
| 1684 | if (TYPE_UNSIGNED (arg_type)) |
| 1685 | arg_type = builtin_type (gdbarch)->builtin_uint32; |
| 1686 | else |
| 1687 | arg_type = builtin_type (gdbarch)->builtin_int32; |
| 1688 | arg = value_cast (arg_type, arg); |
| 1689 | } |
| 1690 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, |
| 1691 | value_contents (arg)); |
| 1692 | break; |
| 1693 | |
| 1694 | case TYPE_CODE_COMPLEX: |
| 1695 | if (info.nsrn <= 6) |
| 1696 | { |
| 1697 | const bfd_byte *buf = value_contents (arg); |
| 1698 | struct type *target_type = |
| 1699 | check_typedef (TYPE_TARGET_TYPE (arg_type)); |
| 1700 | |
| 1701 | pass_in_v (gdbarch, regcache, &info, buf); |
| 1702 | pass_in_v (gdbarch, regcache, &info, |
| 1703 | buf + TYPE_LENGTH (target_type)); |
| 1704 | } |
| 1705 | else |
| 1706 | { |
| 1707 | info.nsrn = 8; |
| 1708 | pass_on_stack (&info, arg_type, value_contents (arg)); |
| 1709 | } |
| 1710 | break; |
| 1711 | case TYPE_CODE_FLT: |
| 1712 | pass_in_v_or_stack (gdbarch, regcache, &info, arg_type, |
| 1713 | value_contents (arg)); |
| 1714 | break; |
| 1715 | |
| 1716 | case TYPE_CODE_STRUCT: |
| 1717 | case TYPE_CODE_ARRAY: |
| 1718 | case TYPE_CODE_UNION: |
| 1719 | if (is_hfa (arg_type)) |
| 1720 | { |
| 1721 | int elements = TYPE_NFIELDS (arg_type); |
| 1722 | |
| 1723 | /* Homogeneous Aggregates */ |
| 1724 | if (info.nsrn + elements < 8) |
| 1725 | { |
| 1726 | int i; |
| 1727 | |
| 1728 | for (i = 0; i < elements; i++) |
| 1729 | { |
| 1730 | /* We know that we have sufficient registers |
| 1731 | available therefore this will never fallback |
| 1732 | to the stack. */ |
| 1733 | struct value *field = |
| 1734 | value_primitive_field (arg, 0, i, arg_type); |
| 1735 | struct type *field_type = |
| 1736 | check_typedef (value_type (field)); |
| 1737 | |
| 1738 | pass_in_v_or_stack (gdbarch, regcache, &info, field_type, |
| 1739 | value_contents_writeable (field)); |
| 1740 | } |
| 1741 | } |
| 1742 | else |
| 1743 | { |
| 1744 | info.nsrn = 8; |
| 1745 | pass_on_stack (&info, arg_type, value_contents (arg)); |
| 1746 | } |
| 1747 | } |
| 1748 | else if (len > 16) |
| 1749 | { |
| 1750 | /* PCS B.7 Aggregates larger than 16 bytes are passed by |
| 1751 | invisible reference. */ |
| 1752 | |
| 1753 | /* Allocate aligned storage. */ |
| 1754 | sp = align_down (sp - len, 16); |
| 1755 | |
| 1756 | /* Write the real data into the stack. */ |
| 1757 | write_memory (sp, value_contents (arg), len); |
| 1758 | |
| 1759 | /* Construct the indirection. */ |
| 1760 | arg_type = lookup_pointer_type (arg_type); |
| 1761 | arg = value_from_pointer (arg_type, sp); |
| 1762 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, |
| 1763 | value_contents (arg)); |
| 1764 | } |
| 1765 | else |
| 1766 | /* PCS C.15 / C.18 multiple values pass. */ |
| 1767 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, |
| 1768 | value_contents (arg)); |
| 1769 | break; |
| 1770 | |
| 1771 | default: |
| 1772 | pass_in_x_or_stack (gdbarch, regcache, &info, arg_type, |
| 1773 | value_contents (arg)); |
| 1774 | break; |
| 1775 | } |
| 1776 | } |
| 1777 | |
| 1778 | /* Make sure stack retains 16 byte alignment. */ |
| 1779 | if (info.nsaa & 15) |
| 1780 | sp -= 16 - (info.nsaa & 15); |
| 1781 | |
| 1782 | while (!VEC_empty (stack_item_t, info.si)) |
| 1783 | { |
| 1784 | stack_item_t *si = VEC_last (stack_item_t, info.si); |
| 1785 | |
| 1786 | sp -= si->len; |
| 1787 | write_memory (sp, si->data, si->len); |
| 1788 | VEC_pop (stack_item_t, info.si); |
| 1789 | } |
| 1790 | |
| 1791 | VEC_free (stack_item_t, info.si); |
| 1792 | |
| 1793 | /* Finally, update the SP register. */ |
| 1794 | regcache_cooked_write_unsigned (regcache, AARCH64_SP_REGNUM, sp); |
| 1795 | |
| 1796 | return sp; |
| 1797 | } |
| 1798 | |
| 1799 | /* Implement the "frame_align" gdbarch method. */ |
| 1800 | |
| 1801 | static CORE_ADDR |
| 1802 | aarch64_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp) |
| 1803 | { |
| 1804 | /* Align the stack to sixteen bytes. */ |
| 1805 | return sp & ~(CORE_ADDR) 15; |
| 1806 | } |
| 1807 | |
| 1808 | /* Return the type for an AdvSISD Q register. */ |
| 1809 | |
| 1810 | static struct type * |
| 1811 | aarch64_vnq_type (struct gdbarch *gdbarch) |
| 1812 | { |
| 1813 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1814 | |
| 1815 | if (tdep->vnq_type == NULL) |
| 1816 | { |
| 1817 | struct type *t; |
| 1818 | struct type *elem; |
| 1819 | |
| 1820 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnq", |
| 1821 | TYPE_CODE_UNION); |
| 1822 | |
| 1823 | elem = builtin_type (gdbarch)->builtin_uint128; |
| 1824 | append_composite_type_field (t, "u", elem); |
| 1825 | |
| 1826 | elem = builtin_type (gdbarch)->builtin_int128; |
| 1827 | append_composite_type_field (t, "s", elem); |
| 1828 | |
| 1829 | tdep->vnq_type = t; |
| 1830 | } |
| 1831 | |
| 1832 | return tdep->vnq_type; |
| 1833 | } |
| 1834 | |
| 1835 | /* Return the type for an AdvSISD D register. */ |
| 1836 | |
| 1837 | static struct type * |
| 1838 | aarch64_vnd_type (struct gdbarch *gdbarch) |
| 1839 | { |
| 1840 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1841 | |
| 1842 | if (tdep->vnd_type == NULL) |
| 1843 | { |
| 1844 | struct type *t; |
| 1845 | struct type *elem; |
| 1846 | |
| 1847 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnd", |
| 1848 | TYPE_CODE_UNION); |
| 1849 | |
| 1850 | elem = builtin_type (gdbarch)->builtin_double; |
| 1851 | append_composite_type_field (t, "f", elem); |
| 1852 | |
| 1853 | elem = builtin_type (gdbarch)->builtin_uint64; |
| 1854 | append_composite_type_field (t, "u", elem); |
| 1855 | |
| 1856 | elem = builtin_type (gdbarch)->builtin_int64; |
| 1857 | append_composite_type_field (t, "s", elem); |
| 1858 | |
| 1859 | tdep->vnd_type = t; |
| 1860 | } |
| 1861 | |
| 1862 | return tdep->vnd_type; |
| 1863 | } |
| 1864 | |
| 1865 | /* Return the type for an AdvSISD S register. */ |
| 1866 | |
| 1867 | static struct type * |
| 1868 | aarch64_vns_type (struct gdbarch *gdbarch) |
| 1869 | { |
| 1870 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1871 | |
| 1872 | if (tdep->vns_type == NULL) |
| 1873 | { |
| 1874 | struct type *t; |
| 1875 | struct type *elem; |
| 1876 | |
| 1877 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vns", |
| 1878 | TYPE_CODE_UNION); |
| 1879 | |
| 1880 | elem = builtin_type (gdbarch)->builtin_float; |
| 1881 | append_composite_type_field (t, "f", elem); |
| 1882 | |
| 1883 | elem = builtin_type (gdbarch)->builtin_uint32; |
| 1884 | append_composite_type_field (t, "u", elem); |
| 1885 | |
| 1886 | elem = builtin_type (gdbarch)->builtin_int32; |
| 1887 | append_composite_type_field (t, "s", elem); |
| 1888 | |
| 1889 | tdep->vns_type = t; |
| 1890 | } |
| 1891 | |
| 1892 | return tdep->vns_type; |
| 1893 | } |
| 1894 | |
| 1895 | /* Return the type for an AdvSISD H register. */ |
| 1896 | |
| 1897 | static struct type * |
| 1898 | aarch64_vnh_type (struct gdbarch *gdbarch) |
| 1899 | { |
| 1900 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1901 | |
| 1902 | if (tdep->vnh_type == NULL) |
| 1903 | { |
| 1904 | struct type *t; |
| 1905 | struct type *elem; |
| 1906 | |
| 1907 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnh", |
| 1908 | TYPE_CODE_UNION); |
| 1909 | |
| 1910 | elem = builtin_type (gdbarch)->builtin_uint16; |
| 1911 | append_composite_type_field (t, "u", elem); |
| 1912 | |
| 1913 | elem = builtin_type (gdbarch)->builtin_int16; |
| 1914 | append_composite_type_field (t, "s", elem); |
| 1915 | |
| 1916 | tdep->vnh_type = t; |
| 1917 | } |
| 1918 | |
| 1919 | return tdep->vnh_type; |
| 1920 | } |
| 1921 | |
| 1922 | /* Return the type for an AdvSISD B register. */ |
| 1923 | |
| 1924 | static struct type * |
| 1925 | aarch64_vnb_type (struct gdbarch *gdbarch) |
| 1926 | { |
| 1927 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1928 | |
| 1929 | if (tdep->vnb_type == NULL) |
| 1930 | { |
| 1931 | struct type *t; |
| 1932 | struct type *elem; |
| 1933 | |
| 1934 | t = arch_composite_type (gdbarch, "__gdb_builtin_type_vnb", |
| 1935 | TYPE_CODE_UNION); |
| 1936 | |
| 1937 | elem = builtin_type (gdbarch)->builtin_uint8; |
| 1938 | append_composite_type_field (t, "u", elem); |
| 1939 | |
| 1940 | elem = builtin_type (gdbarch)->builtin_int8; |
| 1941 | append_composite_type_field (t, "s", elem); |
| 1942 | |
| 1943 | tdep->vnb_type = t; |
| 1944 | } |
| 1945 | |
| 1946 | return tdep->vnb_type; |
| 1947 | } |
| 1948 | |
| 1949 | /* Implement the "dwarf2_reg_to_regnum" gdbarch method. */ |
| 1950 | |
| 1951 | static int |
| 1952 | aarch64_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int reg) |
| 1953 | { |
| 1954 | if (reg >= AARCH64_DWARF_X0 && reg <= AARCH64_DWARF_X0 + 30) |
| 1955 | return AARCH64_X0_REGNUM + reg - AARCH64_DWARF_X0; |
| 1956 | |
| 1957 | if (reg == AARCH64_DWARF_SP) |
| 1958 | return AARCH64_SP_REGNUM; |
| 1959 | |
| 1960 | if (reg >= AARCH64_DWARF_V0 && reg <= AARCH64_DWARF_V0 + 31) |
| 1961 | return AARCH64_V0_REGNUM + reg - AARCH64_DWARF_V0; |
| 1962 | |
| 1963 | return -1; |
| 1964 | } |
| 1965 | \f |
| 1966 | |
| 1967 | /* Implement the "print_insn" gdbarch method. */ |
| 1968 | |
| 1969 | static int |
| 1970 | aarch64_gdb_print_insn (bfd_vma memaddr, disassemble_info *info) |
| 1971 | { |
| 1972 | info->symbols = NULL; |
| 1973 | return print_insn_aarch64 (memaddr, info); |
| 1974 | } |
| 1975 | |
| 1976 | /* AArch64 BRK software debug mode instruction. |
| 1977 | Note that AArch64 code is always little-endian. |
| 1978 | 1101.0100.0010.0000.0000.0000.0000.0000 = 0xd4200000. */ |
| 1979 | static const gdb_byte aarch64_default_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; |
| 1980 | |
| 1981 | /* Implement the "breakpoint_from_pc" gdbarch method. */ |
| 1982 | |
| 1983 | static const gdb_byte * |
| 1984 | aarch64_breakpoint_from_pc (struct gdbarch *gdbarch, CORE_ADDR *pcptr, |
| 1985 | int *lenptr) |
| 1986 | { |
| 1987 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1988 | |
| 1989 | *lenptr = sizeof (aarch64_default_breakpoint); |
| 1990 | return aarch64_default_breakpoint; |
| 1991 | } |
| 1992 | |
| 1993 | /* Extract from an array REGS containing the (raw) register state a |
| 1994 | function return value of type TYPE, and copy that, in virtual |
| 1995 | format, into VALBUF. */ |
| 1996 | |
| 1997 | static void |
| 1998 | aarch64_extract_return_value (struct type *type, struct regcache *regs, |
| 1999 | gdb_byte *valbuf) |
| 2000 | { |
| 2001 | struct gdbarch *gdbarch = get_regcache_arch (regs); |
| 2002 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2003 | |
| 2004 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 2005 | { |
| 2006 | bfd_byte buf[V_REGISTER_SIZE]; |
| 2007 | int len = TYPE_LENGTH (type); |
| 2008 | |
| 2009 | regcache_cooked_read (regs, AARCH64_V0_REGNUM, buf); |
| 2010 | memcpy (valbuf, buf, len); |
| 2011 | } |
| 2012 | else if (TYPE_CODE (type) == TYPE_CODE_INT |
| 2013 | || TYPE_CODE (type) == TYPE_CODE_CHAR |
| 2014 | || TYPE_CODE (type) == TYPE_CODE_BOOL |
| 2015 | || TYPE_CODE (type) == TYPE_CODE_PTR |
| 2016 | || TYPE_CODE (type) == TYPE_CODE_REF |
| 2017 | || TYPE_CODE (type) == TYPE_CODE_ENUM) |
| 2018 | { |
| 2019 | /* If the the type is a plain integer, then the access is |
| 2020 | straight-forward. Otherwise we have to play around a bit |
| 2021 | more. */ |
| 2022 | int len = TYPE_LENGTH (type); |
| 2023 | int regno = AARCH64_X0_REGNUM; |
| 2024 | ULONGEST tmp; |
| 2025 | |
| 2026 | while (len > 0) |
| 2027 | { |
| 2028 | /* By using store_unsigned_integer we avoid having to do |
| 2029 | anything special for small big-endian values. */ |
| 2030 | regcache_cooked_read_unsigned (regs, regno++, &tmp); |
| 2031 | store_unsigned_integer (valbuf, |
| 2032 | (len > X_REGISTER_SIZE |
| 2033 | ? X_REGISTER_SIZE : len), byte_order, tmp); |
| 2034 | len -= X_REGISTER_SIZE; |
| 2035 | valbuf += X_REGISTER_SIZE; |
| 2036 | } |
| 2037 | } |
| 2038 | else if (TYPE_CODE (type) == TYPE_CODE_COMPLEX) |
| 2039 | { |
| 2040 | int regno = AARCH64_V0_REGNUM; |
| 2041 | bfd_byte buf[V_REGISTER_SIZE]; |
| 2042 | struct type *target_type = check_typedef (TYPE_TARGET_TYPE (type)); |
| 2043 | int len = TYPE_LENGTH (target_type); |
| 2044 | |
| 2045 | regcache_cooked_read (regs, regno, buf); |
| 2046 | memcpy (valbuf, buf, len); |
| 2047 | valbuf += len; |
| 2048 | regcache_cooked_read (regs, regno + 1, buf); |
| 2049 | memcpy (valbuf, buf, len); |
| 2050 | valbuf += len; |
| 2051 | } |
| 2052 | else if (is_hfa (type)) |
| 2053 | { |
| 2054 | int elements = TYPE_NFIELDS (type); |
| 2055 | struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 2056 | int len = TYPE_LENGTH (member_type); |
| 2057 | int i; |
| 2058 | |
| 2059 | for (i = 0; i < elements; i++) |
| 2060 | { |
| 2061 | int regno = AARCH64_V0_REGNUM + i; |
| 2062 | bfd_byte buf[X_REGISTER_SIZE]; |
| 2063 | |
| 2064 | if (aarch64_debug) |
| 2065 | fprintf_unfiltered (gdb_stdlog, |
| 2066 | "read HFA return value element %d from %s\n", |
| 2067 | i + 1, |
| 2068 | gdbarch_register_name (gdbarch, regno)); |
| 2069 | regcache_cooked_read (regs, regno, buf); |
| 2070 | |
| 2071 | memcpy (valbuf, buf, len); |
| 2072 | valbuf += len; |
| 2073 | } |
| 2074 | } |
| 2075 | else |
| 2076 | { |
| 2077 | /* For a structure or union the behaviour is as if the value had |
| 2078 | been stored to word-aligned memory and then loaded into |
| 2079 | registers with 64-bit load instruction(s). */ |
| 2080 | int len = TYPE_LENGTH (type); |
| 2081 | int regno = AARCH64_X0_REGNUM; |
| 2082 | bfd_byte buf[X_REGISTER_SIZE]; |
| 2083 | |
| 2084 | while (len > 0) |
| 2085 | { |
| 2086 | regcache_cooked_read (regs, regno++, buf); |
| 2087 | memcpy (valbuf, buf, len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len); |
| 2088 | len -= X_REGISTER_SIZE; |
| 2089 | valbuf += X_REGISTER_SIZE; |
| 2090 | } |
| 2091 | } |
| 2092 | } |
| 2093 | |
| 2094 | |
| 2095 | /* Will a function return an aggregate type in memory or in a |
| 2096 | register? Return 0 if an aggregate type can be returned in a |
| 2097 | register, 1 if it must be returned in memory. */ |
| 2098 | |
| 2099 | static int |
| 2100 | aarch64_return_in_memory (struct gdbarch *gdbarch, struct type *type) |
| 2101 | { |
| 2102 | int nRc; |
| 2103 | enum type_code code; |
| 2104 | |
| 2105 | type = check_typedef (type); |
| 2106 | |
| 2107 | /* In the AArch64 ABI, "integer" like aggregate types are returned |
| 2108 | in registers. For an aggregate type to be integer like, its size |
| 2109 | must be less than or equal to 4 * X_REGISTER_SIZE. */ |
| 2110 | |
| 2111 | if (is_hfa (type)) |
| 2112 | { |
| 2113 | /* PCS B.5 If the argument is a Named HFA, then the argument is |
| 2114 | used unmodified. */ |
| 2115 | return 0; |
| 2116 | } |
| 2117 | |
| 2118 | if (TYPE_LENGTH (type) > 16) |
| 2119 | { |
| 2120 | /* PCS B.6 Aggregates larger than 16 bytes are passed by |
| 2121 | invisible reference. */ |
| 2122 | |
| 2123 | return 1; |
| 2124 | } |
| 2125 | |
| 2126 | return 0; |
| 2127 | } |
| 2128 | |
| 2129 | /* Write into appropriate registers a function return value of type |
| 2130 | TYPE, given in virtual format. */ |
| 2131 | |
| 2132 | static void |
| 2133 | aarch64_store_return_value (struct type *type, struct regcache *regs, |
| 2134 | const gdb_byte *valbuf) |
| 2135 | { |
| 2136 | struct gdbarch *gdbarch = get_regcache_arch (regs); |
| 2137 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2138 | |
| 2139 | if (TYPE_CODE (type) == TYPE_CODE_FLT) |
| 2140 | { |
| 2141 | bfd_byte buf[V_REGISTER_SIZE]; |
| 2142 | int len = TYPE_LENGTH (type); |
| 2143 | |
| 2144 | memcpy (buf, valbuf, len > V_REGISTER_SIZE ? V_REGISTER_SIZE : len); |
| 2145 | regcache_cooked_write (regs, AARCH64_V0_REGNUM, buf); |
| 2146 | } |
| 2147 | else if (TYPE_CODE (type) == TYPE_CODE_INT |
| 2148 | || TYPE_CODE (type) == TYPE_CODE_CHAR |
| 2149 | || TYPE_CODE (type) == TYPE_CODE_BOOL |
| 2150 | || TYPE_CODE (type) == TYPE_CODE_PTR |
| 2151 | || TYPE_CODE (type) == TYPE_CODE_REF |
| 2152 | || TYPE_CODE (type) == TYPE_CODE_ENUM) |
| 2153 | { |
| 2154 | if (TYPE_LENGTH (type) <= X_REGISTER_SIZE) |
| 2155 | { |
| 2156 | /* Values of one word or less are zero/sign-extended and |
| 2157 | returned in r0. */ |
| 2158 | bfd_byte tmpbuf[X_REGISTER_SIZE]; |
| 2159 | LONGEST val = unpack_long (type, valbuf); |
| 2160 | |
| 2161 | store_signed_integer (tmpbuf, X_REGISTER_SIZE, byte_order, val); |
| 2162 | regcache_cooked_write (regs, AARCH64_X0_REGNUM, tmpbuf); |
| 2163 | } |
| 2164 | else |
| 2165 | { |
| 2166 | /* Integral values greater than one word are stored in |
| 2167 | consecutive registers starting with r0. This will always |
| 2168 | be a multiple of the regiser size. */ |
| 2169 | int len = TYPE_LENGTH (type); |
| 2170 | int regno = AARCH64_X0_REGNUM; |
| 2171 | |
| 2172 | while (len > 0) |
| 2173 | { |
| 2174 | regcache_cooked_write (regs, regno++, valbuf); |
| 2175 | len -= X_REGISTER_SIZE; |
| 2176 | valbuf += X_REGISTER_SIZE; |
| 2177 | } |
| 2178 | } |
| 2179 | } |
| 2180 | else if (is_hfa (type)) |
| 2181 | { |
| 2182 | int elements = TYPE_NFIELDS (type); |
| 2183 | struct type *member_type = check_typedef (TYPE_FIELD_TYPE (type, 0)); |
| 2184 | int len = TYPE_LENGTH (member_type); |
| 2185 | int i; |
| 2186 | |
| 2187 | for (i = 0; i < elements; i++) |
| 2188 | { |
| 2189 | int regno = AARCH64_V0_REGNUM + i; |
| 2190 | bfd_byte tmpbuf[MAX_REGISTER_SIZE]; |
| 2191 | |
| 2192 | if (aarch64_debug) |
| 2193 | fprintf_unfiltered (gdb_stdlog, |
| 2194 | "write HFA return value element %d to %s\n", |
| 2195 | i + 1, |
| 2196 | gdbarch_register_name (gdbarch, regno)); |
| 2197 | |
| 2198 | memcpy (tmpbuf, valbuf, len); |
| 2199 | regcache_cooked_write (regs, regno, tmpbuf); |
| 2200 | valbuf += len; |
| 2201 | } |
| 2202 | } |
| 2203 | else |
| 2204 | { |
| 2205 | /* For a structure or union the behaviour is as if the value had |
| 2206 | been stored to word-aligned memory and then loaded into |
| 2207 | registers with 64-bit load instruction(s). */ |
| 2208 | int len = TYPE_LENGTH (type); |
| 2209 | int regno = AARCH64_X0_REGNUM; |
| 2210 | bfd_byte tmpbuf[X_REGISTER_SIZE]; |
| 2211 | |
| 2212 | while (len > 0) |
| 2213 | { |
| 2214 | memcpy (tmpbuf, valbuf, |
| 2215 | len > X_REGISTER_SIZE ? X_REGISTER_SIZE : len); |
| 2216 | regcache_cooked_write (regs, regno++, tmpbuf); |
| 2217 | len -= X_REGISTER_SIZE; |
| 2218 | valbuf += X_REGISTER_SIZE; |
| 2219 | } |
| 2220 | } |
| 2221 | } |
| 2222 | |
| 2223 | /* Implement the "return_value" gdbarch method. */ |
| 2224 | |
| 2225 | static enum return_value_convention |
| 2226 | aarch64_return_value (struct gdbarch *gdbarch, struct value *func_value, |
| 2227 | struct type *valtype, struct regcache *regcache, |
| 2228 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 2229 | { |
| 2230 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2231 | |
| 2232 | if (TYPE_CODE (valtype) == TYPE_CODE_STRUCT |
| 2233 | || TYPE_CODE (valtype) == TYPE_CODE_UNION |
| 2234 | || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) |
| 2235 | { |
| 2236 | if (aarch64_return_in_memory (gdbarch, valtype)) |
| 2237 | { |
| 2238 | if (aarch64_debug) |
| 2239 | fprintf_unfiltered (gdb_stdlog, "return value in memory\n"); |
| 2240 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 2241 | } |
| 2242 | } |
| 2243 | |
| 2244 | if (writebuf) |
| 2245 | aarch64_store_return_value (valtype, regcache, writebuf); |
| 2246 | |
| 2247 | if (readbuf) |
| 2248 | aarch64_extract_return_value (valtype, regcache, readbuf); |
| 2249 | |
| 2250 | if (aarch64_debug) |
| 2251 | fprintf_unfiltered (gdb_stdlog, "return value in registers\n"); |
| 2252 | |
| 2253 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 2254 | } |
| 2255 | |
| 2256 | /* Implement the "get_longjmp_target" gdbarch method. */ |
| 2257 | |
| 2258 | static int |
| 2259 | aarch64_get_longjmp_target (struct frame_info *frame, CORE_ADDR *pc) |
| 2260 | { |
| 2261 | CORE_ADDR jb_addr; |
| 2262 | gdb_byte buf[X_REGISTER_SIZE]; |
| 2263 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 2264 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2265 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 2266 | |
| 2267 | jb_addr = get_frame_register_unsigned (frame, AARCH64_X0_REGNUM); |
| 2268 | |
| 2269 | if (target_read_memory (jb_addr + tdep->jb_pc * tdep->jb_elt_size, buf, |
| 2270 | X_REGISTER_SIZE)) |
| 2271 | return 0; |
| 2272 | |
| 2273 | *pc = extract_unsigned_integer (buf, X_REGISTER_SIZE, byte_order); |
| 2274 | return 1; |
| 2275 | } |
| 2276 | |
| 2277 | /* Implement the "gen_return_address" gdbarch method. */ |
| 2278 | |
| 2279 | static void |
| 2280 | aarch64_gen_return_address (struct gdbarch *gdbarch, |
| 2281 | struct agent_expr *ax, struct axs_value *value, |
| 2282 | CORE_ADDR scope) |
| 2283 | { |
| 2284 | value->type = register_type (gdbarch, AARCH64_LR_REGNUM); |
| 2285 | value->kind = axs_lvalue_register; |
| 2286 | value->u.reg = AARCH64_LR_REGNUM; |
| 2287 | } |
| 2288 | \f |
| 2289 | |
| 2290 | /* Return the pseudo register name corresponding to register regnum. */ |
| 2291 | |
| 2292 | static const char * |
| 2293 | aarch64_pseudo_register_name (struct gdbarch *gdbarch, int regnum) |
| 2294 | { |
| 2295 | static const char *const q_name[] = |
| 2296 | { |
| 2297 | "q0", "q1", "q2", "q3", |
| 2298 | "q4", "q5", "q6", "q7", |
| 2299 | "q8", "q9", "q10", "q11", |
| 2300 | "q12", "q13", "q14", "q15", |
| 2301 | "q16", "q17", "q18", "q19", |
| 2302 | "q20", "q21", "q22", "q23", |
| 2303 | "q24", "q25", "q26", "q27", |
| 2304 | "q28", "q29", "q30", "q31", |
| 2305 | }; |
| 2306 | |
| 2307 | static const char *const d_name[] = |
| 2308 | { |
| 2309 | "d0", "d1", "d2", "d3", |
| 2310 | "d4", "d5", "d6", "d7", |
| 2311 | "d8", "d9", "d10", "d11", |
| 2312 | "d12", "d13", "d14", "d15", |
| 2313 | "d16", "d17", "d18", "d19", |
| 2314 | "d20", "d21", "d22", "d23", |
| 2315 | "d24", "d25", "d26", "d27", |
| 2316 | "d28", "d29", "d30", "d31", |
| 2317 | }; |
| 2318 | |
| 2319 | static const char *const s_name[] = |
| 2320 | { |
| 2321 | "s0", "s1", "s2", "s3", |
| 2322 | "s4", "s5", "s6", "s7", |
| 2323 | "s8", "s9", "s10", "s11", |
| 2324 | "s12", "s13", "s14", "s15", |
| 2325 | "s16", "s17", "s18", "s19", |
| 2326 | "s20", "s21", "s22", "s23", |
| 2327 | "s24", "s25", "s26", "s27", |
| 2328 | "s28", "s29", "s30", "s31", |
| 2329 | }; |
| 2330 | |
| 2331 | static const char *const h_name[] = |
| 2332 | { |
| 2333 | "h0", "h1", "h2", "h3", |
| 2334 | "h4", "h5", "h6", "h7", |
| 2335 | "h8", "h9", "h10", "h11", |
| 2336 | "h12", "h13", "h14", "h15", |
| 2337 | "h16", "h17", "h18", "h19", |
| 2338 | "h20", "h21", "h22", "h23", |
| 2339 | "h24", "h25", "h26", "h27", |
| 2340 | "h28", "h29", "h30", "h31", |
| 2341 | }; |
| 2342 | |
| 2343 | static const char *const b_name[] = |
| 2344 | { |
| 2345 | "b0", "b1", "b2", "b3", |
| 2346 | "b4", "b5", "b6", "b7", |
| 2347 | "b8", "b9", "b10", "b11", |
| 2348 | "b12", "b13", "b14", "b15", |
| 2349 | "b16", "b17", "b18", "b19", |
| 2350 | "b20", "b21", "b22", "b23", |
| 2351 | "b24", "b25", "b26", "b27", |
| 2352 | "b28", "b29", "b30", "b31", |
| 2353 | }; |
| 2354 | |
| 2355 | regnum -= gdbarch_num_regs (gdbarch); |
| 2356 | |
| 2357 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2358 | return q_name[regnum - AARCH64_Q0_REGNUM]; |
| 2359 | |
| 2360 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2361 | return d_name[regnum - AARCH64_D0_REGNUM]; |
| 2362 | |
| 2363 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2364 | return s_name[regnum - AARCH64_S0_REGNUM]; |
| 2365 | |
| 2366 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2367 | return h_name[regnum - AARCH64_H0_REGNUM]; |
| 2368 | |
| 2369 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2370 | return b_name[regnum - AARCH64_B0_REGNUM]; |
| 2371 | |
| 2372 | internal_error (__FILE__, __LINE__, |
| 2373 | _("aarch64_pseudo_register_name: bad register number %d"), |
| 2374 | regnum); |
| 2375 | } |
| 2376 | |
| 2377 | /* Implement the "pseudo_register_type" tdesc_arch_data method. */ |
| 2378 | |
| 2379 | static struct type * |
| 2380 | aarch64_pseudo_register_type (struct gdbarch *gdbarch, int regnum) |
| 2381 | { |
| 2382 | regnum -= gdbarch_num_regs (gdbarch); |
| 2383 | |
| 2384 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2385 | return aarch64_vnq_type (gdbarch); |
| 2386 | |
| 2387 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2388 | return aarch64_vnd_type (gdbarch); |
| 2389 | |
| 2390 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2391 | return aarch64_vns_type (gdbarch); |
| 2392 | |
| 2393 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2394 | return aarch64_vnh_type (gdbarch); |
| 2395 | |
| 2396 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2397 | return aarch64_vnb_type (gdbarch); |
| 2398 | |
| 2399 | internal_error (__FILE__, __LINE__, |
| 2400 | _("aarch64_pseudo_register_type: bad register number %d"), |
| 2401 | regnum); |
| 2402 | } |
| 2403 | |
| 2404 | /* Implement the "pseudo_register_reggroup_p" tdesc_arch_data method. */ |
| 2405 | |
| 2406 | static int |
| 2407 | aarch64_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum, |
| 2408 | struct reggroup *group) |
| 2409 | { |
| 2410 | regnum -= gdbarch_num_regs (gdbarch); |
| 2411 | |
| 2412 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2413 | return group == all_reggroup || group == vector_reggroup; |
| 2414 | else if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2415 | return (group == all_reggroup || group == vector_reggroup |
| 2416 | || group == float_reggroup); |
| 2417 | else if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2418 | return (group == all_reggroup || group == vector_reggroup |
| 2419 | || group == float_reggroup); |
| 2420 | else if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2421 | return group == all_reggroup || group == vector_reggroup; |
| 2422 | else if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2423 | return group == all_reggroup || group == vector_reggroup; |
| 2424 | |
| 2425 | return group == all_reggroup; |
| 2426 | } |
| 2427 | |
| 2428 | /* Implement the "pseudo_register_read_value" gdbarch method. */ |
| 2429 | |
| 2430 | static struct value * |
| 2431 | aarch64_pseudo_read_value (struct gdbarch *gdbarch, |
| 2432 | struct regcache *regcache, |
| 2433 | int regnum) |
| 2434 | { |
| 2435 | gdb_byte reg_buf[MAX_REGISTER_SIZE]; |
| 2436 | struct value *result_value; |
| 2437 | gdb_byte *buf; |
| 2438 | |
| 2439 | result_value = allocate_value (register_type (gdbarch, regnum)); |
| 2440 | VALUE_LVAL (result_value) = lval_register; |
| 2441 | VALUE_REGNUM (result_value) = regnum; |
| 2442 | buf = value_contents_raw (result_value); |
| 2443 | |
| 2444 | regnum -= gdbarch_num_regs (gdbarch); |
| 2445 | |
| 2446 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2447 | { |
| 2448 | enum register_status status; |
| 2449 | unsigned v_regnum; |
| 2450 | |
| 2451 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_Q0_REGNUM; |
| 2452 | status = regcache_raw_read (regcache, v_regnum, reg_buf); |
| 2453 | if (status != REG_VALID) |
| 2454 | mark_value_bytes_unavailable (result_value, 0, |
| 2455 | TYPE_LENGTH (value_type (result_value))); |
| 2456 | else |
| 2457 | memcpy (buf, reg_buf, Q_REGISTER_SIZE); |
| 2458 | return result_value; |
| 2459 | } |
| 2460 | |
| 2461 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2462 | { |
| 2463 | enum register_status status; |
| 2464 | unsigned v_regnum; |
| 2465 | |
| 2466 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_D0_REGNUM; |
| 2467 | status = regcache_raw_read (regcache, v_regnum, reg_buf); |
| 2468 | if (status != REG_VALID) |
| 2469 | mark_value_bytes_unavailable (result_value, 0, |
| 2470 | TYPE_LENGTH (value_type (result_value))); |
| 2471 | else |
| 2472 | memcpy (buf, reg_buf, D_REGISTER_SIZE); |
| 2473 | return result_value; |
| 2474 | } |
| 2475 | |
| 2476 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2477 | { |
| 2478 | enum register_status status; |
| 2479 | unsigned v_regnum; |
| 2480 | |
| 2481 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_S0_REGNUM; |
| 2482 | status = regcache_raw_read (regcache, v_regnum, reg_buf); |
| 2483 | if (status != REG_VALID) |
| 2484 | mark_value_bytes_unavailable (result_value, 0, |
| 2485 | TYPE_LENGTH (value_type (result_value))); |
| 2486 | else |
| 2487 | memcpy (buf, reg_buf, S_REGISTER_SIZE); |
| 2488 | return result_value; |
| 2489 | } |
| 2490 | |
| 2491 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2492 | { |
| 2493 | enum register_status status; |
| 2494 | unsigned v_regnum; |
| 2495 | |
| 2496 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_H0_REGNUM; |
| 2497 | status = regcache_raw_read (regcache, v_regnum, reg_buf); |
| 2498 | if (status != REG_VALID) |
| 2499 | mark_value_bytes_unavailable (result_value, 0, |
| 2500 | TYPE_LENGTH (value_type (result_value))); |
| 2501 | else |
| 2502 | memcpy (buf, reg_buf, H_REGISTER_SIZE); |
| 2503 | return result_value; |
| 2504 | } |
| 2505 | |
| 2506 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2507 | { |
| 2508 | enum register_status status; |
| 2509 | unsigned v_regnum; |
| 2510 | |
| 2511 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_B0_REGNUM; |
| 2512 | status = regcache_raw_read (regcache, v_regnum, reg_buf); |
| 2513 | if (status != REG_VALID) |
| 2514 | mark_value_bytes_unavailable (result_value, 0, |
| 2515 | TYPE_LENGTH (value_type (result_value))); |
| 2516 | else |
| 2517 | memcpy (buf, reg_buf, B_REGISTER_SIZE); |
| 2518 | return result_value; |
| 2519 | } |
| 2520 | |
| 2521 | gdb_assert_not_reached ("regnum out of bound"); |
| 2522 | } |
| 2523 | |
| 2524 | /* Implement the "pseudo_register_write" gdbarch method. */ |
| 2525 | |
| 2526 | static void |
| 2527 | aarch64_pseudo_write (struct gdbarch *gdbarch, struct regcache *regcache, |
| 2528 | int regnum, const gdb_byte *buf) |
| 2529 | { |
| 2530 | gdb_byte reg_buf[MAX_REGISTER_SIZE]; |
| 2531 | |
| 2532 | /* Ensure the register buffer is zero, we want gdb writes of the |
| 2533 | various 'scalar' pseudo registers to behavior like architectural |
| 2534 | writes, register width bytes are written the remainder are set to |
| 2535 | zero. */ |
| 2536 | memset (reg_buf, 0, sizeof (reg_buf)); |
| 2537 | |
| 2538 | regnum -= gdbarch_num_regs (gdbarch); |
| 2539 | |
| 2540 | if (regnum >= AARCH64_Q0_REGNUM && regnum < AARCH64_Q0_REGNUM + 32) |
| 2541 | { |
| 2542 | /* pseudo Q registers */ |
| 2543 | unsigned v_regnum; |
| 2544 | |
| 2545 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_Q0_REGNUM; |
| 2546 | memcpy (reg_buf, buf, Q_REGISTER_SIZE); |
| 2547 | regcache_raw_write (regcache, v_regnum, reg_buf); |
| 2548 | return; |
| 2549 | } |
| 2550 | |
| 2551 | if (regnum >= AARCH64_D0_REGNUM && regnum < AARCH64_D0_REGNUM + 32) |
| 2552 | { |
| 2553 | /* pseudo D registers */ |
| 2554 | unsigned v_regnum; |
| 2555 | |
| 2556 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_D0_REGNUM; |
| 2557 | memcpy (reg_buf, buf, D_REGISTER_SIZE); |
| 2558 | regcache_raw_write (regcache, v_regnum, reg_buf); |
| 2559 | return; |
| 2560 | } |
| 2561 | |
| 2562 | if (regnum >= AARCH64_S0_REGNUM && regnum < AARCH64_S0_REGNUM + 32) |
| 2563 | { |
| 2564 | unsigned v_regnum; |
| 2565 | |
| 2566 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_S0_REGNUM; |
| 2567 | memcpy (reg_buf, buf, S_REGISTER_SIZE); |
| 2568 | regcache_raw_write (regcache, v_regnum, reg_buf); |
| 2569 | return; |
| 2570 | } |
| 2571 | |
| 2572 | if (regnum >= AARCH64_H0_REGNUM && regnum < AARCH64_H0_REGNUM + 32) |
| 2573 | { |
| 2574 | /* pseudo H registers */ |
| 2575 | unsigned v_regnum; |
| 2576 | |
| 2577 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_H0_REGNUM; |
| 2578 | memcpy (reg_buf, buf, H_REGISTER_SIZE); |
| 2579 | regcache_raw_write (regcache, v_regnum, reg_buf); |
| 2580 | return; |
| 2581 | } |
| 2582 | |
| 2583 | if (regnum >= AARCH64_B0_REGNUM && regnum < AARCH64_B0_REGNUM + 32) |
| 2584 | { |
| 2585 | /* pseudo B registers */ |
| 2586 | unsigned v_regnum; |
| 2587 | |
| 2588 | v_regnum = AARCH64_V0_REGNUM + regnum - AARCH64_B0_REGNUM; |
| 2589 | memcpy (reg_buf, buf, B_REGISTER_SIZE); |
| 2590 | regcache_raw_write (regcache, v_regnum, reg_buf); |
| 2591 | return; |
| 2592 | } |
| 2593 | |
| 2594 | gdb_assert_not_reached ("regnum out of bound"); |
| 2595 | } |
| 2596 | |
| 2597 | /* Callback function for user_reg_add. */ |
| 2598 | |
| 2599 | static struct value * |
| 2600 | value_of_aarch64_user_reg (struct frame_info *frame, const void *baton) |
| 2601 | { |
| 2602 | const int *reg_p = baton; |
| 2603 | |
| 2604 | return value_of_register (*reg_p, frame); |
| 2605 | } |
| 2606 | \f |
| 2607 | |
| 2608 | /* Implement the "software_single_step" gdbarch method, needed to |
| 2609 | single step through atomic sequences on AArch64. */ |
| 2610 | |
| 2611 | static int |
| 2612 | aarch64_software_single_step (struct frame_info *frame) |
| 2613 | { |
| 2614 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 2615 | struct address_space *aspace = get_frame_address_space (frame); |
| 2616 | enum bfd_endian byte_order_for_code = gdbarch_byte_order_for_code (gdbarch); |
| 2617 | const int insn_size = 4; |
| 2618 | const int atomic_sequence_length = 16; /* Instruction sequence length. */ |
| 2619 | CORE_ADDR pc = get_frame_pc (frame); |
| 2620 | CORE_ADDR breaks[2] = { -1, -1 }; |
| 2621 | CORE_ADDR loc = pc; |
| 2622 | CORE_ADDR closing_insn = 0; |
| 2623 | uint32_t insn = read_memory_unsigned_integer (loc, insn_size, |
| 2624 | byte_order_for_code); |
| 2625 | int index; |
| 2626 | int insn_count; |
| 2627 | int bc_insn_count = 0; /* Conditional branch instruction count. */ |
| 2628 | int last_breakpoint = 0; /* Defaults to 0 (no breakpoints placed). */ |
| 2629 | |
| 2630 | /* Look for a Load Exclusive instruction which begins the sequence. */ |
| 2631 | if (!decode_masked_match (insn, 0x3fc00000, 0x08400000)) |
| 2632 | return 0; |
| 2633 | |
| 2634 | for (insn_count = 0; insn_count < atomic_sequence_length; ++insn_count) |
| 2635 | { |
| 2636 | int32_t offset; |
| 2637 | unsigned cond; |
| 2638 | |
| 2639 | loc += insn_size; |
| 2640 | insn = read_memory_unsigned_integer (loc, insn_size, |
| 2641 | byte_order_for_code); |
| 2642 | |
| 2643 | /* Check if the instruction is a conditional branch. */ |
| 2644 | if (decode_bcond (loc, insn, &cond, &offset)) |
| 2645 | { |
| 2646 | if (bc_insn_count >= 1) |
| 2647 | return 0; |
| 2648 | |
| 2649 | /* It is, so we'll try to set a breakpoint at the destination. */ |
| 2650 | breaks[1] = loc + offset; |
| 2651 | |
| 2652 | bc_insn_count++; |
| 2653 | last_breakpoint++; |
| 2654 | } |
| 2655 | |
| 2656 | /* Look for the Store Exclusive which closes the atomic sequence. */ |
| 2657 | if (decode_masked_match (insn, 0x3fc00000, 0x08000000)) |
| 2658 | { |
| 2659 | closing_insn = loc; |
| 2660 | break; |
| 2661 | } |
| 2662 | } |
| 2663 | |
| 2664 | /* We didn't find a closing Store Exclusive instruction, fall back. */ |
| 2665 | if (!closing_insn) |
| 2666 | return 0; |
| 2667 | |
| 2668 | /* Insert breakpoint after the end of the atomic sequence. */ |
| 2669 | breaks[0] = loc + insn_size; |
| 2670 | |
| 2671 | /* Check for duplicated breakpoints, and also check that the second |
| 2672 | breakpoint is not within the atomic sequence. */ |
| 2673 | if (last_breakpoint |
| 2674 | && (breaks[1] == breaks[0] |
| 2675 | || (breaks[1] >= pc && breaks[1] <= closing_insn))) |
| 2676 | last_breakpoint = 0; |
| 2677 | |
| 2678 | /* Insert the breakpoint at the end of the sequence, and one at the |
| 2679 | destination of the conditional branch, if it exists. */ |
| 2680 | for (index = 0; index <= last_breakpoint; index++) |
| 2681 | insert_single_step_breakpoint (gdbarch, aspace, breaks[index]); |
| 2682 | |
| 2683 | return 1; |
| 2684 | } |
| 2685 | |
| 2686 | /* Initialize the current architecture based on INFO. If possible, |
| 2687 | re-use an architecture from ARCHES, which is a list of |
| 2688 | architectures already created during this debugging session. |
| 2689 | |
| 2690 | Called e.g. at program startup, when reading a core file, and when |
| 2691 | reading a binary file. */ |
| 2692 | |
| 2693 | static struct gdbarch * |
| 2694 | aarch64_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 2695 | { |
| 2696 | struct gdbarch_tdep *tdep; |
| 2697 | struct gdbarch *gdbarch; |
| 2698 | struct gdbarch_list *best_arch; |
| 2699 | struct tdesc_arch_data *tdesc_data = NULL; |
| 2700 | const struct target_desc *tdesc = info.target_desc; |
| 2701 | int i; |
| 2702 | int have_fpa_registers = 1; |
| 2703 | int valid_p = 1; |
| 2704 | const struct tdesc_feature *feature; |
| 2705 | int num_regs = 0; |
| 2706 | int num_pseudo_regs = 0; |
| 2707 | |
| 2708 | /* Ensure we always have a target descriptor. */ |
| 2709 | if (!tdesc_has_registers (tdesc)) |
| 2710 | tdesc = tdesc_aarch64; |
| 2711 | |
| 2712 | gdb_assert (tdesc); |
| 2713 | |
| 2714 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.core"); |
| 2715 | |
| 2716 | if (feature == NULL) |
| 2717 | return NULL; |
| 2718 | |
| 2719 | tdesc_data = tdesc_data_alloc (); |
| 2720 | |
| 2721 | /* Validate the descriptor provides the mandatory core R registers |
| 2722 | and allocate their numbers. */ |
| 2723 | for (i = 0; i < ARRAY_SIZE (aarch64_r_register_names); i++) |
| 2724 | valid_p &= |
| 2725 | tdesc_numbered_register (feature, tdesc_data, AARCH64_X0_REGNUM + i, |
| 2726 | aarch64_r_register_names[i]); |
| 2727 | |
| 2728 | num_regs = AARCH64_X0_REGNUM + i; |
| 2729 | |
| 2730 | /* Look for the V registers. */ |
| 2731 | feature = tdesc_find_feature (tdesc, "org.gnu.gdb.aarch64.fpu"); |
| 2732 | if (feature) |
| 2733 | { |
| 2734 | /* Validate the descriptor provides the mandatory V registers |
| 2735 | and allocate their numbers. */ |
| 2736 | for (i = 0; i < ARRAY_SIZE (aarch64_v_register_names); i++) |
| 2737 | valid_p &= |
| 2738 | tdesc_numbered_register (feature, tdesc_data, AARCH64_V0_REGNUM + i, |
| 2739 | aarch64_v_register_names[i]); |
| 2740 | |
| 2741 | num_regs = AARCH64_V0_REGNUM + i; |
| 2742 | |
| 2743 | num_pseudo_regs += 32; /* add the Qn scalar register pseudos */ |
| 2744 | num_pseudo_regs += 32; /* add the Dn scalar register pseudos */ |
| 2745 | num_pseudo_regs += 32; /* add the Sn scalar register pseudos */ |
| 2746 | num_pseudo_regs += 32; /* add the Hn scalar register pseudos */ |
| 2747 | num_pseudo_regs += 32; /* add the Bn scalar register pseudos */ |
| 2748 | } |
| 2749 | |
| 2750 | if (!valid_p) |
| 2751 | { |
| 2752 | tdesc_data_cleanup (tdesc_data); |
| 2753 | return NULL; |
| 2754 | } |
| 2755 | |
| 2756 | /* AArch64 code is always little-endian. */ |
| 2757 | info.byte_order_for_code = BFD_ENDIAN_LITTLE; |
| 2758 | |
| 2759 | /* If there is already a candidate, use it. */ |
| 2760 | for (best_arch = gdbarch_list_lookup_by_info (arches, &info); |
| 2761 | best_arch != NULL; |
| 2762 | best_arch = gdbarch_list_lookup_by_info (best_arch->next, &info)) |
| 2763 | { |
| 2764 | /* Found a match. */ |
| 2765 | break; |
| 2766 | } |
| 2767 | |
| 2768 | if (best_arch != NULL) |
| 2769 | { |
| 2770 | if (tdesc_data != NULL) |
| 2771 | tdesc_data_cleanup (tdesc_data); |
| 2772 | return best_arch->gdbarch; |
| 2773 | } |
| 2774 | |
| 2775 | tdep = XCNEW (struct gdbarch_tdep); |
| 2776 | gdbarch = gdbarch_alloc (&info, tdep); |
| 2777 | |
| 2778 | /* This should be low enough for everything. */ |
| 2779 | tdep->lowest_pc = 0x20; |
| 2780 | tdep->jb_pc = -1; /* Longjump support not enabled by default. */ |
| 2781 | tdep->jb_elt_size = 8; |
| 2782 | |
| 2783 | set_gdbarch_push_dummy_call (gdbarch, aarch64_push_dummy_call); |
| 2784 | set_gdbarch_frame_align (gdbarch, aarch64_frame_align); |
| 2785 | |
| 2786 | /* Frame handling. */ |
| 2787 | set_gdbarch_dummy_id (gdbarch, aarch64_dummy_id); |
| 2788 | set_gdbarch_unwind_pc (gdbarch, aarch64_unwind_pc); |
| 2789 | set_gdbarch_unwind_sp (gdbarch, aarch64_unwind_sp); |
| 2790 | |
| 2791 | /* Advance PC across function entry code. */ |
| 2792 | set_gdbarch_skip_prologue (gdbarch, aarch64_skip_prologue); |
| 2793 | |
| 2794 | /* The stack grows downward. */ |
| 2795 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 2796 | |
| 2797 | /* Breakpoint manipulation. */ |
| 2798 | set_gdbarch_breakpoint_from_pc (gdbarch, aarch64_breakpoint_from_pc); |
| 2799 | set_gdbarch_have_nonsteppable_watchpoint (gdbarch, 1); |
| 2800 | set_gdbarch_software_single_step (gdbarch, aarch64_software_single_step); |
| 2801 | |
| 2802 | /* Information about registers, etc. */ |
| 2803 | set_gdbarch_sp_regnum (gdbarch, AARCH64_SP_REGNUM); |
| 2804 | set_gdbarch_pc_regnum (gdbarch, AARCH64_PC_REGNUM); |
| 2805 | set_gdbarch_num_regs (gdbarch, num_regs); |
| 2806 | |
| 2807 | set_gdbarch_num_pseudo_regs (gdbarch, num_pseudo_regs); |
| 2808 | set_gdbarch_pseudo_register_read_value (gdbarch, aarch64_pseudo_read_value); |
| 2809 | set_gdbarch_pseudo_register_write (gdbarch, aarch64_pseudo_write); |
| 2810 | set_tdesc_pseudo_register_name (gdbarch, aarch64_pseudo_register_name); |
| 2811 | set_tdesc_pseudo_register_type (gdbarch, aarch64_pseudo_register_type); |
| 2812 | set_tdesc_pseudo_register_reggroup_p (gdbarch, |
| 2813 | aarch64_pseudo_register_reggroup_p); |
| 2814 | |
| 2815 | /* ABI */ |
| 2816 | set_gdbarch_short_bit (gdbarch, 16); |
| 2817 | set_gdbarch_int_bit (gdbarch, 32); |
| 2818 | set_gdbarch_float_bit (gdbarch, 32); |
| 2819 | set_gdbarch_double_bit (gdbarch, 64); |
| 2820 | set_gdbarch_long_double_bit (gdbarch, 128); |
| 2821 | set_gdbarch_long_bit (gdbarch, 64); |
| 2822 | set_gdbarch_long_long_bit (gdbarch, 64); |
| 2823 | set_gdbarch_ptr_bit (gdbarch, 64); |
| 2824 | set_gdbarch_char_signed (gdbarch, 0); |
| 2825 | set_gdbarch_float_format (gdbarch, floatformats_ieee_single); |
| 2826 | set_gdbarch_double_format (gdbarch, floatformats_ieee_double); |
| 2827 | set_gdbarch_long_double_format (gdbarch, floatformats_ia64_quad); |
| 2828 | |
| 2829 | /* Internal <-> external register number maps. */ |
| 2830 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, aarch64_dwarf_reg_to_regnum); |
| 2831 | |
| 2832 | /* Returning results. */ |
| 2833 | set_gdbarch_return_value (gdbarch, aarch64_return_value); |
| 2834 | |
| 2835 | /* Disassembly. */ |
| 2836 | set_gdbarch_print_insn (gdbarch, aarch64_gdb_print_insn); |
| 2837 | |
| 2838 | /* Virtual tables. */ |
| 2839 | set_gdbarch_vbit_in_delta (gdbarch, 1); |
| 2840 | |
| 2841 | /* Hook in the ABI-specific overrides, if they have been registered. */ |
| 2842 | info.target_desc = tdesc; |
| 2843 | info.tdep_info = (void *) tdesc_data; |
| 2844 | gdbarch_init_osabi (info, gdbarch); |
| 2845 | |
| 2846 | dwarf2_frame_set_init_reg (gdbarch, aarch64_dwarf2_frame_init_reg); |
| 2847 | |
| 2848 | /* Add some default predicates. */ |
| 2849 | frame_unwind_append_unwinder (gdbarch, &aarch64_stub_unwind); |
| 2850 | dwarf2_append_unwinders (gdbarch); |
| 2851 | frame_unwind_append_unwinder (gdbarch, &aarch64_prologue_unwind); |
| 2852 | |
| 2853 | frame_base_set_default (gdbarch, &aarch64_normal_base); |
| 2854 | |
| 2855 | /* Now we have tuned the configuration, set a few final things, |
| 2856 | based on what the OS ABI has told us. */ |
| 2857 | |
| 2858 | if (tdep->jb_pc >= 0) |
| 2859 | set_gdbarch_get_longjmp_target (gdbarch, aarch64_get_longjmp_target); |
| 2860 | |
| 2861 | set_gdbarch_gen_return_address (gdbarch, aarch64_gen_return_address); |
| 2862 | |
| 2863 | tdesc_use_registers (gdbarch, tdesc, tdesc_data); |
| 2864 | |
| 2865 | /* Add standard register aliases. */ |
| 2866 | for (i = 0; i < ARRAY_SIZE (aarch64_register_aliases); i++) |
| 2867 | user_reg_add (gdbarch, aarch64_register_aliases[i].name, |
| 2868 | value_of_aarch64_user_reg, |
| 2869 | &aarch64_register_aliases[i].regnum); |
| 2870 | |
| 2871 | return gdbarch; |
| 2872 | } |
| 2873 | |
| 2874 | static void |
| 2875 | aarch64_dump_tdep (struct gdbarch *gdbarch, struct ui_file *file) |
| 2876 | { |
| 2877 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 2878 | |
| 2879 | if (tdep == NULL) |
| 2880 | return; |
| 2881 | |
| 2882 | fprintf_unfiltered (file, _("aarch64_dump_tdep: Lowest pc = 0x%s"), |
| 2883 | paddress (gdbarch, tdep->lowest_pc)); |
| 2884 | } |
| 2885 | |
| 2886 | /* Suppress warning from -Wmissing-prototypes. */ |
| 2887 | extern initialize_file_ftype _initialize_aarch64_tdep; |
| 2888 | |
| 2889 | void |
| 2890 | _initialize_aarch64_tdep (void) |
| 2891 | { |
| 2892 | gdbarch_register (bfd_arch_aarch64, aarch64_gdbarch_init, |
| 2893 | aarch64_dump_tdep); |
| 2894 | |
| 2895 | initialize_tdesc_aarch64 (); |
| 2896 | |
| 2897 | /* Debug this file's internals. */ |
| 2898 | add_setshow_boolean_cmd ("aarch64", class_maintenance, &aarch64_debug, _("\ |
| 2899 | Set AArch64 debugging."), _("\ |
| 2900 | Show AArch64 debugging."), _("\ |
| 2901 | When on, AArch64 specific debugging is enabled."), |
| 2902 | NULL, |
| 2903 | show_aarch64_debug, |
| 2904 | &setdebuglist, &showdebuglist); |
| 2905 | } |
| 2906 | |
| 2907 | /* AArch64 process record-replay related structures, defines etc. */ |
| 2908 | |
| 2909 | #define submask(x) ((1L << ((x) + 1)) - 1) |
| 2910 | #define bit(obj,st) (((obj) >> (st)) & 1) |
| 2911 | #define bits(obj,st,fn) (((obj) >> (st)) & submask ((fn) - (st))) |
| 2912 | |
| 2913 | #define REG_ALLOC(REGS, LENGTH, RECORD_BUF) \ |
| 2914 | do \ |
| 2915 | { \ |
| 2916 | unsigned int reg_len = LENGTH; \ |
| 2917 | if (reg_len) \ |
| 2918 | { \ |
| 2919 | REGS = XNEWVEC (uint32_t, reg_len); \ |
| 2920 | memcpy(®S[0], &RECORD_BUF[0], sizeof(uint32_t)*LENGTH); \ |
| 2921 | } \ |
| 2922 | } \ |
| 2923 | while (0) |
| 2924 | |
| 2925 | #define MEM_ALLOC(MEMS, LENGTH, RECORD_BUF) \ |
| 2926 | do \ |
| 2927 | { \ |
| 2928 | unsigned int mem_len = LENGTH; \ |
| 2929 | if (mem_len) \ |
| 2930 | { \ |
| 2931 | MEMS = XNEWVEC (struct aarch64_mem_r, mem_len); \ |
| 2932 | memcpy(&MEMS->len, &RECORD_BUF[0], \ |
| 2933 | sizeof(struct aarch64_mem_r) * LENGTH); \ |
| 2934 | } \ |
| 2935 | } \ |
| 2936 | while (0) |
| 2937 | |
| 2938 | /* AArch64 record/replay structures and enumerations. */ |
| 2939 | |
| 2940 | struct aarch64_mem_r |
| 2941 | { |
| 2942 | uint64_t len; /* Record length. */ |
| 2943 | uint64_t addr; /* Memory address. */ |
| 2944 | }; |
| 2945 | |
| 2946 | enum aarch64_record_result |
| 2947 | { |
| 2948 | AARCH64_RECORD_SUCCESS, |
| 2949 | AARCH64_RECORD_FAILURE, |
| 2950 | AARCH64_RECORD_UNSUPPORTED, |
| 2951 | AARCH64_RECORD_UNKNOWN |
| 2952 | }; |
| 2953 | |
| 2954 | typedef struct insn_decode_record_t |
| 2955 | { |
| 2956 | struct gdbarch *gdbarch; |
| 2957 | struct regcache *regcache; |
| 2958 | CORE_ADDR this_addr; /* Address of insn to be recorded. */ |
| 2959 | uint32_t aarch64_insn; /* Insn to be recorded. */ |
| 2960 | uint32_t mem_rec_count; /* Count of memory records. */ |
| 2961 | uint32_t reg_rec_count; /* Count of register records. */ |
| 2962 | uint32_t *aarch64_regs; /* Registers to be recorded. */ |
| 2963 | struct aarch64_mem_r *aarch64_mems; /* Memory locations to be recorded. */ |
| 2964 | } insn_decode_record; |
| 2965 | |
| 2966 | /* Record handler for data processing - register instructions. */ |
| 2967 | |
| 2968 | static unsigned int |
| 2969 | aarch64_record_data_proc_reg (insn_decode_record *aarch64_insn_r) |
| 2970 | { |
| 2971 | uint8_t reg_rd, insn_bits24_27, insn_bits21_23; |
| 2972 | uint32_t record_buf[4]; |
| 2973 | |
| 2974 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 2975 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 2976 | insn_bits21_23 = bits (aarch64_insn_r->aarch64_insn, 21, 23); |
| 2977 | |
| 2978 | if (!bit (aarch64_insn_r->aarch64_insn, 28)) |
| 2979 | { |
| 2980 | uint8_t setflags; |
| 2981 | |
| 2982 | /* Logical (shifted register). */ |
| 2983 | if (insn_bits24_27 == 0x0a) |
| 2984 | setflags = (bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03); |
| 2985 | /* Add/subtract. */ |
| 2986 | else if (insn_bits24_27 == 0x0b) |
| 2987 | setflags = bit (aarch64_insn_r->aarch64_insn, 29); |
| 2988 | else |
| 2989 | return AARCH64_RECORD_UNKNOWN; |
| 2990 | |
| 2991 | record_buf[0] = reg_rd; |
| 2992 | aarch64_insn_r->reg_rec_count = 1; |
| 2993 | if (setflags) |
| 2994 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 2995 | } |
| 2996 | else |
| 2997 | { |
| 2998 | if (insn_bits24_27 == 0x0b) |
| 2999 | { |
| 3000 | /* Data-processing (3 source). */ |
| 3001 | record_buf[0] = reg_rd; |
| 3002 | aarch64_insn_r->reg_rec_count = 1; |
| 3003 | } |
| 3004 | else if (insn_bits24_27 == 0x0a) |
| 3005 | { |
| 3006 | if (insn_bits21_23 == 0x00) |
| 3007 | { |
| 3008 | /* Add/subtract (with carry). */ |
| 3009 | record_buf[0] = reg_rd; |
| 3010 | aarch64_insn_r->reg_rec_count = 1; |
| 3011 | if (bit (aarch64_insn_r->aarch64_insn, 29)) |
| 3012 | { |
| 3013 | record_buf[1] = AARCH64_CPSR_REGNUM; |
| 3014 | aarch64_insn_r->reg_rec_count = 2; |
| 3015 | } |
| 3016 | } |
| 3017 | else if (insn_bits21_23 == 0x02) |
| 3018 | { |
| 3019 | /* Conditional compare (register) and conditional compare |
| 3020 | (immediate) instructions. */ |
| 3021 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3022 | aarch64_insn_r->reg_rec_count = 1; |
| 3023 | } |
| 3024 | else if (insn_bits21_23 == 0x04 || insn_bits21_23 == 0x06) |
| 3025 | { |
| 3026 | /* CConditional select. */ |
| 3027 | /* Data-processing (2 source). */ |
| 3028 | /* Data-processing (1 source). */ |
| 3029 | record_buf[0] = reg_rd; |
| 3030 | aarch64_insn_r->reg_rec_count = 1; |
| 3031 | } |
| 3032 | else |
| 3033 | return AARCH64_RECORD_UNKNOWN; |
| 3034 | } |
| 3035 | } |
| 3036 | |
| 3037 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3038 | record_buf); |
| 3039 | return AARCH64_RECORD_SUCCESS; |
| 3040 | } |
| 3041 | |
| 3042 | /* Record handler for data processing - immediate instructions. */ |
| 3043 | |
| 3044 | static unsigned int |
| 3045 | aarch64_record_data_proc_imm (insn_decode_record *aarch64_insn_r) |
| 3046 | { |
| 3047 | uint8_t reg_rd, insn_bit28, insn_bit23, insn_bits24_27, setflags; |
| 3048 | uint32_t record_buf[4]; |
| 3049 | |
| 3050 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3051 | insn_bit28 = bit (aarch64_insn_r->aarch64_insn, 28); |
| 3052 | insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23); |
| 3053 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3054 | |
| 3055 | if (insn_bits24_27 == 0x00 /* PC rel addressing. */ |
| 3056 | || insn_bits24_27 == 0x03 /* Bitfield and Extract. */ |
| 3057 | || (insn_bits24_27 == 0x02 && insn_bit23)) /* Move wide (immediate). */ |
| 3058 | { |
| 3059 | record_buf[0] = reg_rd; |
| 3060 | aarch64_insn_r->reg_rec_count = 1; |
| 3061 | } |
| 3062 | else if (insn_bits24_27 == 0x01) |
| 3063 | { |
| 3064 | /* Add/Subtract (immediate). */ |
| 3065 | setflags = bit (aarch64_insn_r->aarch64_insn, 29); |
| 3066 | record_buf[0] = reg_rd; |
| 3067 | aarch64_insn_r->reg_rec_count = 1; |
| 3068 | if (setflags) |
| 3069 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 3070 | } |
| 3071 | else if (insn_bits24_27 == 0x02 && !insn_bit23) |
| 3072 | { |
| 3073 | /* Logical (immediate). */ |
| 3074 | setflags = bits (aarch64_insn_r->aarch64_insn, 29, 30) == 0x03; |
| 3075 | record_buf[0] = reg_rd; |
| 3076 | aarch64_insn_r->reg_rec_count = 1; |
| 3077 | if (setflags) |
| 3078 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_CPSR_REGNUM; |
| 3079 | } |
| 3080 | else |
| 3081 | return AARCH64_RECORD_UNKNOWN; |
| 3082 | |
| 3083 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3084 | record_buf); |
| 3085 | return AARCH64_RECORD_SUCCESS; |
| 3086 | } |
| 3087 | |
| 3088 | /* Record handler for branch, exception generation and system instructions. */ |
| 3089 | |
| 3090 | static unsigned int |
| 3091 | aarch64_record_branch_except_sys (insn_decode_record *aarch64_insn_r) |
| 3092 | { |
| 3093 | struct gdbarch_tdep *tdep = gdbarch_tdep (aarch64_insn_r->gdbarch); |
| 3094 | uint8_t insn_bits24_27, insn_bits28_31, insn_bits22_23; |
| 3095 | uint32_t record_buf[4]; |
| 3096 | |
| 3097 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3098 | insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); |
| 3099 | insn_bits22_23 = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3100 | |
| 3101 | if (insn_bits28_31 == 0x0d) |
| 3102 | { |
| 3103 | /* Exception generation instructions. */ |
| 3104 | if (insn_bits24_27 == 0x04) |
| 3105 | { |
| 3106 | if (!bits (aarch64_insn_r->aarch64_insn, 2, 4) |
| 3107 | && !bits (aarch64_insn_r->aarch64_insn, 21, 23) |
| 3108 | && bits (aarch64_insn_r->aarch64_insn, 0, 1) == 0x01) |
| 3109 | { |
| 3110 | ULONGEST svc_number; |
| 3111 | |
| 3112 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, 8, |
| 3113 | &svc_number); |
| 3114 | return tdep->aarch64_syscall_record (aarch64_insn_r->regcache, |
| 3115 | svc_number); |
| 3116 | } |
| 3117 | else |
| 3118 | return AARCH64_RECORD_UNSUPPORTED; |
| 3119 | } |
| 3120 | /* System instructions. */ |
| 3121 | else if (insn_bits24_27 == 0x05 && insn_bits22_23 == 0x00) |
| 3122 | { |
| 3123 | uint32_t reg_rt, reg_crn; |
| 3124 | |
| 3125 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3126 | reg_crn = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3127 | |
| 3128 | /* Record rt in case of sysl and mrs instructions. */ |
| 3129 | if (bit (aarch64_insn_r->aarch64_insn, 21)) |
| 3130 | { |
| 3131 | record_buf[0] = reg_rt; |
| 3132 | aarch64_insn_r->reg_rec_count = 1; |
| 3133 | } |
| 3134 | /* Record cpsr for hint and msr(immediate) instructions. */ |
| 3135 | else if (reg_crn == 0x02 || reg_crn == 0x04) |
| 3136 | { |
| 3137 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3138 | aarch64_insn_r->reg_rec_count = 1; |
| 3139 | } |
| 3140 | } |
| 3141 | /* Unconditional branch (register). */ |
| 3142 | else if((insn_bits24_27 & 0x0e) == 0x06) |
| 3143 | { |
| 3144 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3145 | if (bits (aarch64_insn_r->aarch64_insn, 21, 22) == 0x01) |
| 3146 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM; |
| 3147 | } |
| 3148 | else |
| 3149 | return AARCH64_RECORD_UNKNOWN; |
| 3150 | } |
| 3151 | /* Unconditional branch (immediate). */ |
| 3152 | else if ((insn_bits28_31 & 0x07) == 0x01 && (insn_bits24_27 & 0x0c) == 0x04) |
| 3153 | { |
| 3154 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3155 | if (bit (aarch64_insn_r->aarch64_insn, 31)) |
| 3156 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_LR_REGNUM; |
| 3157 | } |
| 3158 | else |
| 3159 | /* Compare & branch (immediate), Test & branch (immediate) and |
| 3160 | Conditional branch (immediate). */ |
| 3161 | record_buf[aarch64_insn_r->reg_rec_count++] = AARCH64_PC_REGNUM; |
| 3162 | |
| 3163 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3164 | record_buf); |
| 3165 | return AARCH64_RECORD_SUCCESS; |
| 3166 | } |
| 3167 | |
| 3168 | /* Record handler for advanced SIMD load and store instructions. */ |
| 3169 | |
| 3170 | static unsigned int |
| 3171 | aarch64_record_asimd_load_store (insn_decode_record *aarch64_insn_r) |
| 3172 | { |
| 3173 | CORE_ADDR address; |
| 3174 | uint64_t addr_offset = 0; |
| 3175 | uint32_t record_buf[24]; |
| 3176 | uint64_t record_buf_mem[24]; |
| 3177 | uint32_t reg_rn, reg_rt; |
| 3178 | uint32_t reg_index = 0, mem_index = 0; |
| 3179 | uint8_t opcode_bits, size_bits; |
| 3180 | |
| 3181 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3182 | reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); |
| 3183 | size_bits = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3184 | opcode_bits = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3185 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, &address); |
| 3186 | |
| 3187 | if (record_debug) |
| 3188 | { |
| 3189 | fprintf_unfiltered (gdb_stdlog, |
| 3190 | "Process record: Advanced SIMD load/store\n"); |
| 3191 | } |
| 3192 | |
| 3193 | /* Load/store single structure. */ |
| 3194 | if (bit (aarch64_insn_r->aarch64_insn, 24)) |
| 3195 | { |
| 3196 | uint8_t sindex, scale, selem, esize, replicate = 0; |
| 3197 | scale = opcode_bits >> 2; |
| 3198 | selem = ((opcode_bits & 0x02) | |
| 3199 | bit (aarch64_insn_r->aarch64_insn, 21)) + 1; |
| 3200 | switch (scale) |
| 3201 | { |
| 3202 | case 1: |
| 3203 | if (size_bits & 0x01) |
| 3204 | return AARCH64_RECORD_UNKNOWN; |
| 3205 | break; |
| 3206 | case 2: |
| 3207 | if ((size_bits >> 1) & 0x01) |
| 3208 | return AARCH64_RECORD_UNKNOWN; |
| 3209 | if (size_bits & 0x01) |
| 3210 | { |
| 3211 | if (!((opcode_bits >> 1) & 0x01)) |
| 3212 | scale = 3; |
| 3213 | else |
| 3214 | return AARCH64_RECORD_UNKNOWN; |
| 3215 | } |
| 3216 | break; |
| 3217 | case 3: |
| 3218 | if (bit (aarch64_insn_r->aarch64_insn, 22) && !(opcode_bits & 0x01)) |
| 3219 | { |
| 3220 | scale = size_bits; |
| 3221 | replicate = 1; |
| 3222 | break; |
| 3223 | } |
| 3224 | else |
| 3225 | return AARCH64_RECORD_UNKNOWN; |
| 3226 | default: |
| 3227 | break; |
| 3228 | } |
| 3229 | esize = 8 << scale; |
| 3230 | if (replicate) |
| 3231 | for (sindex = 0; sindex < selem; sindex++) |
| 3232 | { |
| 3233 | record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; |
| 3234 | reg_rt = (reg_rt + 1) % 32; |
| 3235 | } |
| 3236 | else |
| 3237 | { |
| 3238 | for (sindex = 0; sindex < selem; sindex++) |
| 3239 | if (bit (aarch64_insn_r->aarch64_insn, 22)) |
| 3240 | record_buf[reg_index++] = reg_rt + AARCH64_V0_REGNUM; |
| 3241 | else |
| 3242 | { |
| 3243 | record_buf_mem[mem_index++] = esize / 8; |
| 3244 | record_buf_mem[mem_index++] = address + addr_offset; |
| 3245 | } |
| 3246 | addr_offset = addr_offset + (esize / 8); |
| 3247 | reg_rt = (reg_rt + 1) % 32; |
| 3248 | } |
| 3249 | } |
| 3250 | /* Load/store multiple structure. */ |
| 3251 | else |
| 3252 | { |
| 3253 | uint8_t selem, esize, rpt, elements; |
| 3254 | uint8_t eindex, rindex; |
| 3255 | |
| 3256 | esize = 8 << size_bits; |
| 3257 | if (bit (aarch64_insn_r->aarch64_insn, 30)) |
| 3258 | elements = 128 / esize; |
| 3259 | else |
| 3260 | elements = 64 / esize; |
| 3261 | |
| 3262 | switch (opcode_bits) |
| 3263 | { |
| 3264 | /*LD/ST4 (4 Registers). */ |
| 3265 | case 0: |
| 3266 | rpt = 1; |
| 3267 | selem = 4; |
| 3268 | break; |
| 3269 | /*LD/ST1 (4 Registers). */ |
| 3270 | case 2: |
| 3271 | rpt = 4; |
| 3272 | selem = 1; |
| 3273 | break; |
| 3274 | /*LD/ST3 (3 Registers). */ |
| 3275 | case 4: |
| 3276 | rpt = 1; |
| 3277 | selem = 3; |
| 3278 | break; |
| 3279 | /*LD/ST1 (3 Registers). */ |
| 3280 | case 6: |
| 3281 | rpt = 3; |
| 3282 | selem = 1; |
| 3283 | break; |
| 3284 | /*LD/ST1 (1 Register). */ |
| 3285 | case 7: |
| 3286 | rpt = 1; |
| 3287 | selem = 1; |
| 3288 | break; |
| 3289 | /*LD/ST2 (2 Registers). */ |
| 3290 | case 8: |
| 3291 | rpt = 1; |
| 3292 | selem = 2; |
| 3293 | break; |
| 3294 | /*LD/ST1 (2 Registers). */ |
| 3295 | case 10: |
| 3296 | rpt = 2; |
| 3297 | selem = 1; |
| 3298 | break; |
| 3299 | default: |
| 3300 | return AARCH64_RECORD_UNSUPPORTED; |
| 3301 | break; |
| 3302 | } |
| 3303 | for (rindex = 0; rindex < rpt; rindex++) |
| 3304 | for (eindex = 0; eindex < elements; eindex++) |
| 3305 | { |
| 3306 | uint8_t reg_tt, sindex; |
| 3307 | reg_tt = (reg_rt + rindex) % 32; |
| 3308 | for (sindex = 0; sindex < selem; sindex++) |
| 3309 | { |
| 3310 | if (bit (aarch64_insn_r->aarch64_insn, 22)) |
| 3311 | record_buf[reg_index++] = reg_tt + AARCH64_V0_REGNUM; |
| 3312 | else |
| 3313 | { |
| 3314 | record_buf_mem[mem_index++] = esize / 8; |
| 3315 | record_buf_mem[mem_index++] = address + addr_offset; |
| 3316 | } |
| 3317 | addr_offset = addr_offset + (esize / 8); |
| 3318 | reg_tt = (reg_tt + 1) % 32; |
| 3319 | } |
| 3320 | } |
| 3321 | } |
| 3322 | |
| 3323 | if (bit (aarch64_insn_r->aarch64_insn, 23)) |
| 3324 | record_buf[reg_index++] = reg_rn; |
| 3325 | |
| 3326 | aarch64_insn_r->reg_rec_count = reg_index; |
| 3327 | aarch64_insn_r->mem_rec_count = mem_index / 2; |
| 3328 | MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, |
| 3329 | record_buf_mem); |
| 3330 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3331 | record_buf); |
| 3332 | return AARCH64_RECORD_SUCCESS; |
| 3333 | } |
| 3334 | |
| 3335 | /* Record handler for load and store instructions. */ |
| 3336 | |
| 3337 | static unsigned int |
| 3338 | aarch64_record_load_store (insn_decode_record *aarch64_insn_r) |
| 3339 | { |
| 3340 | uint8_t insn_bits24_27, insn_bits28_29, insn_bits10_11; |
| 3341 | uint8_t insn_bit23, insn_bit21; |
| 3342 | uint8_t opc, size_bits, ld_flag, vector_flag; |
| 3343 | uint32_t reg_rn, reg_rt, reg_rt2; |
| 3344 | uint64_t datasize, offset; |
| 3345 | uint32_t record_buf[8]; |
| 3346 | uint64_t record_buf_mem[8]; |
| 3347 | CORE_ADDR address; |
| 3348 | |
| 3349 | insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3350 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3351 | insn_bits28_29 = bits (aarch64_insn_r->aarch64_insn, 28, 29); |
| 3352 | insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); |
| 3353 | insn_bit23 = bit (aarch64_insn_r->aarch64_insn, 23); |
| 3354 | ld_flag = bit (aarch64_insn_r->aarch64_insn, 22); |
| 3355 | vector_flag = bit (aarch64_insn_r->aarch64_insn, 26); |
| 3356 | reg_rt = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3357 | reg_rn = bits (aarch64_insn_r->aarch64_insn, 5, 9); |
| 3358 | reg_rt2 = bits (aarch64_insn_r->aarch64_insn, 10, 14); |
| 3359 | size_bits = bits (aarch64_insn_r->aarch64_insn, 30, 31); |
| 3360 | |
| 3361 | /* Load/store exclusive. */ |
| 3362 | if (insn_bits24_27 == 0x08 && insn_bits28_29 == 0x00) |
| 3363 | { |
| 3364 | if (record_debug) |
| 3365 | { |
| 3366 | fprintf_unfiltered (gdb_stdlog, |
| 3367 | "Process record: load/store exclusive\n"); |
| 3368 | } |
| 3369 | |
| 3370 | if (ld_flag) |
| 3371 | { |
| 3372 | record_buf[0] = reg_rt; |
| 3373 | aarch64_insn_r->reg_rec_count = 1; |
| 3374 | if (insn_bit21) |
| 3375 | { |
| 3376 | record_buf[1] = reg_rt2; |
| 3377 | aarch64_insn_r->reg_rec_count = 2; |
| 3378 | } |
| 3379 | } |
| 3380 | else |
| 3381 | { |
| 3382 | if (insn_bit21) |
| 3383 | datasize = (8 << size_bits) * 2; |
| 3384 | else |
| 3385 | datasize = (8 << size_bits); |
| 3386 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3387 | &address); |
| 3388 | record_buf_mem[0] = datasize / 8; |
| 3389 | record_buf_mem[1] = address; |
| 3390 | aarch64_insn_r->mem_rec_count = 1; |
| 3391 | if (!insn_bit23) |
| 3392 | { |
| 3393 | /* Save register rs. */ |
| 3394 | record_buf[0] = bits (aarch64_insn_r->aarch64_insn, 16, 20); |
| 3395 | aarch64_insn_r->reg_rec_count = 1; |
| 3396 | } |
| 3397 | } |
| 3398 | } |
| 3399 | /* Load register (literal) instructions decoding. */ |
| 3400 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x01) |
| 3401 | { |
| 3402 | if (record_debug) |
| 3403 | { |
| 3404 | fprintf_unfiltered (gdb_stdlog, |
| 3405 | "Process record: load register (literal)\n"); |
| 3406 | } |
| 3407 | if (vector_flag) |
| 3408 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3409 | else |
| 3410 | record_buf[0] = reg_rt; |
| 3411 | aarch64_insn_r->reg_rec_count = 1; |
| 3412 | } |
| 3413 | /* All types of load/store pair instructions decoding. */ |
| 3414 | else if ((insn_bits24_27 & 0x0a) == 0x08 && insn_bits28_29 == 0x02) |
| 3415 | { |
| 3416 | if (record_debug) |
| 3417 | { |
| 3418 | fprintf_unfiltered (gdb_stdlog, |
| 3419 | "Process record: load/store pair\n"); |
| 3420 | } |
| 3421 | |
| 3422 | if (ld_flag) |
| 3423 | { |
| 3424 | if (vector_flag) |
| 3425 | { |
| 3426 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3427 | record_buf[1] = reg_rt2 + AARCH64_V0_REGNUM; |
| 3428 | } |
| 3429 | else |
| 3430 | { |
| 3431 | record_buf[0] = reg_rt; |
| 3432 | record_buf[1] = reg_rt2; |
| 3433 | } |
| 3434 | aarch64_insn_r->reg_rec_count = 2; |
| 3435 | } |
| 3436 | else |
| 3437 | { |
| 3438 | uint16_t imm7_off; |
| 3439 | imm7_off = bits (aarch64_insn_r->aarch64_insn, 15, 21); |
| 3440 | if (!vector_flag) |
| 3441 | size_bits = size_bits >> 1; |
| 3442 | datasize = 8 << (2 + size_bits); |
| 3443 | offset = (imm7_off & 0x40) ? (~imm7_off & 0x007f) + 1 : imm7_off; |
| 3444 | offset = offset << (2 + size_bits); |
| 3445 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3446 | &address); |
| 3447 | if (!((insn_bits24_27 & 0x0b) == 0x08 && insn_bit23)) |
| 3448 | { |
| 3449 | if (imm7_off & 0x40) |
| 3450 | address = address - offset; |
| 3451 | else |
| 3452 | address = address + offset; |
| 3453 | } |
| 3454 | |
| 3455 | record_buf_mem[0] = datasize / 8; |
| 3456 | record_buf_mem[1] = address; |
| 3457 | record_buf_mem[2] = datasize / 8; |
| 3458 | record_buf_mem[3] = address + (datasize / 8); |
| 3459 | aarch64_insn_r->mem_rec_count = 2; |
| 3460 | } |
| 3461 | if (bit (aarch64_insn_r->aarch64_insn, 23)) |
| 3462 | record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn; |
| 3463 | } |
| 3464 | /* Load/store register (unsigned immediate) instructions. */ |
| 3465 | else if ((insn_bits24_27 & 0x0b) == 0x09 && insn_bits28_29 == 0x03) |
| 3466 | { |
| 3467 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3468 | if (!(opc >> 1)) |
| 3469 | if (opc & 0x01) |
| 3470 | ld_flag = 0x01; |
| 3471 | else |
| 3472 | ld_flag = 0x0; |
| 3473 | else |
| 3474 | if (size_bits != 0x03) |
| 3475 | ld_flag = 0x01; |
| 3476 | else |
| 3477 | return AARCH64_RECORD_UNKNOWN; |
| 3478 | |
| 3479 | if (record_debug) |
| 3480 | { |
| 3481 | fprintf_unfiltered (gdb_stdlog, |
| 3482 | "Process record: load/store (unsigned immediate):" |
| 3483 | " size %x V %d opc %x\n", size_bits, vector_flag, |
| 3484 | opc); |
| 3485 | } |
| 3486 | |
| 3487 | if (!ld_flag) |
| 3488 | { |
| 3489 | offset = bits (aarch64_insn_r->aarch64_insn, 10, 21); |
| 3490 | datasize = 8 << size_bits; |
| 3491 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3492 | &address); |
| 3493 | offset = offset << size_bits; |
| 3494 | address = address + offset; |
| 3495 | |
| 3496 | record_buf_mem[0] = datasize >> 3; |
| 3497 | record_buf_mem[1] = address; |
| 3498 | aarch64_insn_r->mem_rec_count = 1; |
| 3499 | } |
| 3500 | else |
| 3501 | { |
| 3502 | if (vector_flag) |
| 3503 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3504 | else |
| 3505 | record_buf[0] = reg_rt; |
| 3506 | aarch64_insn_r->reg_rec_count = 1; |
| 3507 | } |
| 3508 | } |
| 3509 | /* Load/store register (register offset) instructions. */ |
| 3510 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 |
| 3511 | && insn_bits10_11 == 0x02 && insn_bit21) |
| 3512 | { |
| 3513 | if (record_debug) |
| 3514 | { |
| 3515 | fprintf_unfiltered (gdb_stdlog, |
| 3516 | "Process record: load/store (register offset)\n"); |
| 3517 | } |
| 3518 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3519 | if (!(opc >> 1)) |
| 3520 | if (opc & 0x01) |
| 3521 | ld_flag = 0x01; |
| 3522 | else |
| 3523 | ld_flag = 0x0; |
| 3524 | else |
| 3525 | if (size_bits != 0x03) |
| 3526 | ld_flag = 0x01; |
| 3527 | else |
| 3528 | return AARCH64_RECORD_UNKNOWN; |
| 3529 | |
| 3530 | if (!ld_flag) |
| 3531 | { |
| 3532 | uint64_t reg_rm_val; |
| 3533 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, |
| 3534 | bits (aarch64_insn_r->aarch64_insn, 16, 20), ®_rm_val); |
| 3535 | if (bit (aarch64_insn_r->aarch64_insn, 12)) |
| 3536 | offset = reg_rm_val << size_bits; |
| 3537 | else |
| 3538 | offset = reg_rm_val; |
| 3539 | datasize = 8 << size_bits; |
| 3540 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3541 | &address); |
| 3542 | address = address + offset; |
| 3543 | record_buf_mem[0] = datasize >> 3; |
| 3544 | record_buf_mem[1] = address; |
| 3545 | aarch64_insn_r->mem_rec_count = 1; |
| 3546 | } |
| 3547 | else |
| 3548 | { |
| 3549 | if (vector_flag) |
| 3550 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3551 | else |
| 3552 | record_buf[0] = reg_rt; |
| 3553 | aarch64_insn_r->reg_rec_count = 1; |
| 3554 | } |
| 3555 | } |
| 3556 | /* Load/store register (immediate and unprivileged) instructions. */ |
| 3557 | else if ((insn_bits24_27 & 0x0b) == 0x08 && insn_bits28_29 == 0x03 |
| 3558 | && !insn_bit21) |
| 3559 | { |
| 3560 | if (record_debug) |
| 3561 | { |
| 3562 | fprintf_unfiltered (gdb_stdlog, |
| 3563 | "Process record: load/store (immediate and unprivileged)\n"); |
| 3564 | } |
| 3565 | opc = bits (aarch64_insn_r->aarch64_insn, 22, 23); |
| 3566 | if (!(opc >> 1)) |
| 3567 | if (opc & 0x01) |
| 3568 | ld_flag = 0x01; |
| 3569 | else |
| 3570 | ld_flag = 0x0; |
| 3571 | else |
| 3572 | if (size_bits != 0x03) |
| 3573 | ld_flag = 0x01; |
| 3574 | else |
| 3575 | return AARCH64_RECORD_UNKNOWN; |
| 3576 | |
| 3577 | if (!ld_flag) |
| 3578 | { |
| 3579 | uint16_t imm9_off; |
| 3580 | imm9_off = bits (aarch64_insn_r->aarch64_insn, 12, 20); |
| 3581 | offset = (imm9_off & 0x0100) ? (((~imm9_off) & 0x01ff) + 1) : imm9_off; |
| 3582 | datasize = 8 << size_bits; |
| 3583 | regcache_raw_read_unsigned (aarch64_insn_r->regcache, reg_rn, |
| 3584 | &address); |
| 3585 | if (insn_bits10_11 != 0x01) |
| 3586 | { |
| 3587 | if (imm9_off & 0x0100) |
| 3588 | address = address - offset; |
| 3589 | else |
| 3590 | address = address + offset; |
| 3591 | } |
| 3592 | record_buf_mem[0] = datasize >> 3; |
| 3593 | record_buf_mem[1] = address; |
| 3594 | aarch64_insn_r->mem_rec_count = 1; |
| 3595 | } |
| 3596 | else |
| 3597 | { |
| 3598 | if (vector_flag) |
| 3599 | record_buf[0] = reg_rt + AARCH64_V0_REGNUM; |
| 3600 | else |
| 3601 | record_buf[0] = reg_rt; |
| 3602 | aarch64_insn_r->reg_rec_count = 1; |
| 3603 | } |
| 3604 | if (insn_bits10_11 == 0x01 || insn_bits10_11 == 0x03) |
| 3605 | record_buf[aarch64_insn_r->reg_rec_count++] = reg_rn; |
| 3606 | } |
| 3607 | /* Advanced SIMD load/store instructions. */ |
| 3608 | else |
| 3609 | return aarch64_record_asimd_load_store (aarch64_insn_r); |
| 3610 | |
| 3611 | MEM_ALLOC (aarch64_insn_r->aarch64_mems, aarch64_insn_r->mem_rec_count, |
| 3612 | record_buf_mem); |
| 3613 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3614 | record_buf); |
| 3615 | return AARCH64_RECORD_SUCCESS; |
| 3616 | } |
| 3617 | |
| 3618 | /* Record handler for data processing SIMD and floating point instructions. */ |
| 3619 | |
| 3620 | static unsigned int |
| 3621 | aarch64_record_data_proc_simd_fp (insn_decode_record *aarch64_insn_r) |
| 3622 | { |
| 3623 | uint8_t insn_bit21, opcode, rmode, reg_rd; |
| 3624 | uint8_t insn_bits24_27, insn_bits28_31, insn_bits10_11, insn_bits12_15; |
| 3625 | uint8_t insn_bits11_14; |
| 3626 | uint32_t record_buf[2]; |
| 3627 | |
| 3628 | insn_bits24_27 = bits (aarch64_insn_r->aarch64_insn, 24, 27); |
| 3629 | insn_bits28_31 = bits (aarch64_insn_r->aarch64_insn, 28, 31); |
| 3630 | insn_bits10_11 = bits (aarch64_insn_r->aarch64_insn, 10, 11); |
| 3631 | insn_bits12_15 = bits (aarch64_insn_r->aarch64_insn, 12, 15); |
| 3632 | insn_bits11_14 = bits (aarch64_insn_r->aarch64_insn, 11, 14); |
| 3633 | opcode = bits (aarch64_insn_r->aarch64_insn, 16, 18); |
| 3634 | rmode = bits (aarch64_insn_r->aarch64_insn, 19, 20); |
| 3635 | reg_rd = bits (aarch64_insn_r->aarch64_insn, 0, 4); |
| 3636 | insn_bit21 = bit (aarch64_insn_r->aarch64_insn, 21); |
| 3637 | |
| 3638 | if (record_debug) |
| 3639 | { |
| 3640 | fprintf_unfiltered (gdb_stdlog, |
| 3641 | "Process record: data processing SIMD/FP: "); |
| 3642 | } |
| 3643 | |
| 3644 | if ((insn_bits28_31 & 0x05) == 0x01 && insn_bits24_27 == 0x0e) |
| 3645 | { |
| 3646 | /* Floating point - fixed point conversion instructions. */ |
| 3647 | if (!insn_bit21) |
| 3648 | { |
| 3649 | if (record_debug) |
| 3650 | fprintf_unfiltered (gdb_stdlog, "FP - fixed point conversion"); |
| 3651 | |
| 3652 | if ((opcode >> 1) == 0x0 && rmode == 0x03) |
| 3653 | record_buf[0] = reg_rd; |
| 3654 | else |
| 3655 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3656 | } |
| 3657 | /* Floating point - conditional compare instructions. */ |
| 3658 | else if (insn_bits10_11 == 0x01) |
| 3659 | { |
| 3660 | if (record_debug) |
| 3661 | fprintf_unfiltered (gdb_stdlog, "FP - conditional compare"); |
| 3662 | |
| 3663 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3664 | } |
| 3665 | /* Floating point - data processing (2-source) and |
| 3666 | conditional select instructions. */ |
| 3667 | else if (insn_bits10_11 == 0x02 || insn_bits10_11 == 0x03) |
| 3668 | { |
| 3669 | if (record_debug) |
| 3670 | fprintf_unfiltered (gdb_stdlog, "FP - DP (2-source)"); |
| 3671 | |
| 3672 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3673 | } |
| 3674 | else if (insn_bits10_11 == 0x00) |
| 3675 | { |
| 3676 | /* Floating point - immediate instructions. */ |
| 3677 | if ((insn_bits12_15 & 0x01) == 0x01 |
| 3678 | || (insn_bits12_15 & 0x07) == 0x04) |
| 3679 | { |
| 3680 | if (record_debug) |
| 3681 | fprintf_unfiltered (gdb_stdlog, "FP - immediate"); |
| 3682 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3683 | } |
| 3684 | /* Floating point - compare instructions. */ |
| 3685 | else if ((insn_bits12_15 & 0x03) == 0x02) |
| 3686 | { |
| 3687 | if (record_debug) |
| 3688 | fprintf_unfiltered (gdb_stdlog, "FP - immediate"); |
| 3689 | record_buf[0] = AARCH64_CPSR_REGNUM; |
| 3690 | } |
| 3691 | /* Floating point - integer conversions instructions. */ |
| 3692 | else if (insn_bits12_15 == 0x00) |
| 3693 | { |
| 3694 | /* Convert float to integer instruction. */ |
| 3695 | if (!(opcode >> 1) || ((opcode >> 1) == 0x02 && !rmode)) |
| 3696 | { |
| 3697 | if (record_debug) |
| 3698 | fprintf_unfiltered (gdb_stdlog, "float to int conversion"); |
| 3699 | |
| 3700 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 3701 | } |
| 3702 | /* Convert integer to float instruction. */ |
| 3703 | else if ((opcode >> 1) == 0x01 && !rmode) |
| 3704 | { |
| 3705 | if (record_debug) |
| 3706 | fprintf_unfiltered (gdb_stdlog, "int to float conversion"); |
| 3707 | |
| 3708 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3709 | } |
| 3710 | /* Move float to integer instruction. */ |
| 3711 | else if ((opcode >> 1) == 0x03) |
| 3712 | { |
| 3713 | if (record_debug) |
| 3714 | fprintf_unfiltered (gdb_stdlog, "move float to int"); |
| 3715 | |
| 3716 | if (!(opcode & 0x01)) |
| 3717 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 3718 | else |
| 3719 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3720 | } |
| 3721 | else |
| 3722 | return AARCH64_RECORD_UNKNOWN; |
| 3723 | } |
| 3724 | else |
| 3725 | return AARCH64_RECORD_UNKNOWN; |
| 3726 | } |
| 3727 | else |
| 3728 | return AARCH64_RECORD_UNKNOWN; |
| 3729 | } |
| 3730 | else if ((insn_bits28_31 & 0x09) == 0x00 && insn_bits24_27 == 0x0e) |
| 3731 | { |
| 3732 | if (record_debug) |
| 3733 | fprintf_unfiltered (gdb_stdlog, "SIMD copy"); |
| 3734 | |
| 3735 | /* Advanced SIMD copy instructions. */ |
| 3736 | if (!bits (aarch64_insn_r->aarch64_insn, 21, 23) |
| 3737 | && !bit (aarch64_insn_r->aarch64_insn, 15) |
| 3738 | && bit (aarch64_insn_r->aarch64_insn, 10)) |
| 3739 | { |
| 3740 | if (insn_bits11_14 == 0x05 || insn_bits11_14 == 0x07) |
| 3741 | record_buf[0] = reg_rd + AARCH64_X0_REGNUM; |
| 3742 | else |
| 3743 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3744 | } |
| 3745 | else |
| 3746 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3747 | } |
| 3748 | /* All remaining floating point or advanced SIMD instructions. */ |
| 3749 | else |
| 3750 | { |
| 3751 | if (record_debug) |
| 3752 | fprintf_unfiltered (gdb_stdlog, "all remain"); |
| 3753 | |
| 3754 | record_buf[0] = reg_rd + AARCH64_V0_REGNUM; |
| 3755 | } |
| 3756 | |
| 3757 | if (record_debug) |
| 3758 | fprintf_unfiltered (gdb_stdlog, "\n"); |
| 3759 | |
| 3760 | aarch64_insn_r->reg_rec_count++; |
| 3761 | gdb_assert (aarch64_insn_r->reg_rec_count == 1); |
| 3762 | REG_ALLOC (aarch64_insn_r->aarch64_regs, aarch64_insn_r->reg_rec_count, |
| 3763 | record_buf); |
| 3764 | return AARCH64_RECORD_SUCCESS; |
| 3765 | } |
| 3766 | |
| 3767 | /* Decodes insns type and invokes its record handler. */ |
| 3768 | |
| 3769 | static unsigned int |
| 3770 | aarch64_record_decode_insn_handler (insn_decode_record *aarch64_insn_r) |
| 3771 | { |
| 3772 | uint32_t ins_bit25, ins_bit26, ins_bit27, ins_bit28; |
| 3773 | |
| 3774 | ins_bit25 = bit (aarch64_insn_r->aarch64_insn, 25); |
| 3775 | ins_bit26 = bit (aarch64_insn_r->aarch64_insn, 26); |
| 3776 | ins_bit27 = bit (aarch64_insn_r->aarch64_insn, 27); |
| 3777 | ins_bit28 = bit (aarch64_insn_r->aarch64_insn, 28); |
| 3778 | |
| 3779 | /* Data processing - immediate instructions. */ |
| 3780 | if (!ins_bit26 && !ins_bit27 && ins_bit28) |
| 3781 | return aarch64_record_data_proc_imm (aarch64_insn_r); |
| 3782 | |
| 3783 | /* Branch, exception generation and system instructions. */ |
| 3784 | if (ins_bit26 && !ins_bit27 && ins_bit28) |
| 3785 | return aarch64_record_branch_except_sys (aarch64_insn_r); |
| 3786 | |
| 3787 | /* Load and store instructions. */ |
| 3788 | if (!ins_bit25 && ins_bit27) |
| 3789 | return aarch64_record_load_store (aarch64_insn_r); |
| 3790 | |
| 3791 | /* Data processing - register instructions. */ |
| 3792 | if (ins_bit25 && !ins_bit26 && ins_bit27) |
| 3793 | return aarch64_record_data_proc_reg (aarch64_insn_r); |
| 3794 | |
| 3795 | /* Data processing - SIMD and floating point instructions. */ |
| 3796 | if (ins_bit25 && ins_bit26 && ins_bit27) |
| 3797 | return aarch64_record_data_proc_simd_fp (aarch64_insn_r); |
| 3798 | |
| 3799 | return AARCH64_RECORD_UNSUPPORTED; |
| 3800 | } |
| 3801 | |
| 3802 | /* Cleans up local record registers and memory allocations. */ |
| 3803 | |
| 3804 | static void |
| 3805 | deallocate_reg_mem (insn_decode_record *record) |
| 3806 | { |
| 3807 | xfree (record->aarch64_regs); |
| 3808 | xfree (record->aarch64_mems); |
| 3809 | } |
| 3810 | |
| 3811 | /* Parse the current instruction and record the values of the registers and |
| 3812 | memory that will be changed in current instruction to record_arch_list |
| 3813 | return -1 if something is wrong. */ |
| 3814 | |
| 3815 | int |
| 3816 | aarch64_process_record (struct gdbarch *gdbarch, struct regcache *regcache, |
| 3817 | CORE_ADDR insn_addr) |
| 3818 | { |
| 3819 | uint32_t rec_no = 0; |
| 3820 | uint8_t insn_size = 4; |
| 3821 | uint32_t ret = 0; |
| 3822 | ULONGEST t_bit = 0, insn_id = 0; |
| 3823 | gdb_byte buf[insn_size]; |
| 3824 | insn_decode_record aarch64_record; |
| 3825 | |
| 3826 | memset (&buf[0], 0, insn_size); |
| 3827 | memset (&aarch64_record, 0, sizeof (insn_decode_record)); |
| 3828 | target_read_memory (insn_addr, &buf[0], insn_size); |
| 3829 | aarch64_record.aarch64_insn |
| 3830 | = (uint32_t) extract_unsigned_integer (&buf[0], |
| 3831 | insn_size, |
| 3832 | gdbarch_byte_order (gdbarch)); |
| 3833 | aarch64_record.regcache = regcache; |
| 3834 | aarch64_record.this_addr = insn_addr; |
| 3835 | aarch64_record.gdbarch = gdbarch; |
| 3836 | |
| 3837 | ret = aarch64_record_decode_insn_handler (&aarch64_record); |
| 3838 | if (ret == AARCH64_RECORD_UNSUPPORTED) |
| 3839 | { |
| 3840 | printf_unfiltered (_("Process record does not support instruction " |
| 3841 | "0x%0x at address %s.\n"), |
| 3842 | aarch64_record.aarch64_insn, |
| 3843 | paddress (gdbarch, insn_addr)); |
| 3844 | ret = -1; |
| 3845 | } |
| 3846 | |
| 3847 | if (0 == ret) |
| 3848 | { |
| 3849 | /* Record registers. */ |
| 3850 | record_full_arch_list_add_reg (aarch64_record.regcache, |
| 3851 | AARCH64_PC_REGNUM); |
| 3852 | /* Always record register CPSR. */ |
| 3853 | record_full_arch_list_add_reg (aarch64_record.regcache, |
| 3854 | AARCH64_CPSR_REGNUM); |
| 3855 | if (aarch64_record.aarch64_regs) |
| 3856 | for (rec_no = 0; rec_no < aarch64_record.reg_rec_count; rec_no++) |
| 3857 | if (record_full_arch_list_add_reg (aarch64_record.regcache, |
| 3858 | aarch64_record.aarch64_regs[rec_no])) |
| 3859 | ret = -1; |
| 3860 | |
| 3861 | /* Record memories. */ |
| 3862 | if (aarch64_record.aarch64_mems) |
| 3863 | for (rec_no = 0; rec_no < aarch64_record.mem_rec_count; rec_no++) |
| 3864 | if (record_full_arch_list_add_mem |
| 3865 | ((CORE_ADDR)aarch64_record.aarch64_mems[rec_no].addr, |
| 3866 | aarch64_record.aarch64_mems[rec_no].len)) |
| 3867 | ret = -1; |
| 3868 | |
| 3869 | if (record_full_arch_list_add_end ()) |
| 3870 | ret = -1; |
| 3871 | } |
| 3872 | |
| 3873 | deallocate_reg_mem (&aarch64_record); |
| 3874 | return ret; |
| 3875 | } |