| 1 | /* Intel 387 floating point stuff. |
| 2 | |
| 3 | Copyright (C) 1988-2017 Free Software Foundation, Inc. |
| 4 | |
| 5 | This file is part of GDB. |
| 6 | |
| 7 | This program is free software; you can redistribute it and/or modify |
| 8 | it under the terms of the GNU General Public License as published by |
| 9 | the Free Software Foundation; either version 3 of the License, or |
| 10 | (at your option) any later version. |
| 11 | |
| 12 | This program is distributed in the hope that it will be useful, |
| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | GNU General Public License for more details. |
| 16 | |
| 17 | You should have received a copy of the GNU General Public License |
| 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 19 | |
| 20 | #include "defs.h" |
| 21 | #include "doublest.h" |
| 22 | #include "frame.h" |
| 23 | #include "gdbcore.h" |
| 24 | #include "inferior.h" |
| 25 | #include "language.h" |
| 26 | #include "regcache.h" |
| 27 | #include "value.h" |
| 28 | |
| 29 | #include "i386-tdep.h" |
| 30 | #include "i387-tdep.h" |
| 31 | #include "x86-xstate.h" |
| 32 | |
| 33 | /* Print the floating point number specified by RAW. */ |
| 34 | |
| 35 | static void |
| 36 | print_i387_value (struct gdbarch *gdbarch, |
| 37 | const gdb_byte *raw, struct ui_file *file) |
| 38 | { |
| 39 | DOUBLEST value; |
| 40 | |
| 41 | /* Using extract_typed_floating here might affect the representation |
| 42 | of certain numbers such as NaNs, even if GDB is running natively. |
| 43 | This is fine since our caller already detects such special |
| 44 | numbers and we print the hexadecimal representation anyway. */ |
| 45 | value = extract_typed_floating (raw, i387_ext_type (gdbarch)); |
| 46 | |
| 47 | /* We try to print 19 digits. The last digit may or may not contain |
| 48 | garbage, but we'd better print one too many. We need enough room |
| 49 | to print the value, 1 position for the sign, 1 for the decimal |
| 50 | point, 19 for the digits and 6 for the exponent adds up to 27. */ |
| 51 | #ifdef PRINTF_HAS_LONG_DOUBLE |
| 52 | fprintf_filtered (file, " %-+27.19Lg", (long double) value); |
| 53 | #else |
| 54 | fprintf_filtered (file, " %-+27.19g", (double) value); |
| 55 | #endif |
| 56 | } |
| 57 | |
| 58 | /* Print the classification for the register contents RAW. */ |
| 59 | |
| 60 | static void |
| 61 | print_i387_ext (struct gdbarch *gdbarch, |
| 62 | const gdb_byte *raw, struct ui_file *file) |
| 63 | { |
| 64 | int sign; |
| 65 | int integer; |
| 66 | unsigned int exponent; |
| 67 | unsigned long fraction[2]; |
| 68 | |
| 69 | sign = raw[9] & 0x80; |
| 70 | integer = raw[7] & 0x80; |
| 71 | exponent = (((raw[9] & 0x7f) << 8) | raw[8]); |
| 72 | fraction[0] = ((raw[3] << 24) | (raw[2] << 16) | (raw[1] << 8) | raw[0]); |
| 73 | fraction[1] = (((raw[7] & 0x7f) << 24) | (raw[6] << 16) |
| 74 | | (raw[5] << 8) | raw[4]); |
| 75 | |
| 76 | if (exponent == 0x7fff && integer) |
| 77 | { |
| 78 | if (fraction[0] == 0x00000000 && fraction[1] == 0x00000000) |
| 79 | /* Infinity. */ |
| 80 | fprintf_filtered (file, " %cInf", (sign ? '-' : '+')); |
| 81 | else if (sign && fraction[0] == 0x00000000 && fraction[1] == 0x40000000) |
| 82 | /* Real Indefinite (QNaN). */ |
| 83 | fputs_unfiltered (" Real Indefinite (QNaN)", file); |
| 84 | else if (fraction[1] & 0x40000000) |
| 85 | /* QNaN. */ |
| 86 | fputs_filtered (" QNaN", file); |
| 87 | else |
| 88 | /* SNaN. */ |
| 89 | fputs_filtered (" SNaN", file); |
| 90 | } |
| 91 | else if (exponent < 0x7fff && exponent > 0x0000 && integer) |
| 92 | /* Normal. */ |
| 93 | print_i387_value (gdbarch, raw, file); |
| 94 | else if (exponent == 0x0000) |
| 95 | { |
| 96 | /* Denormal or zero. */ |
| 97 | print_i387_value (gdbarch, raw, file); |
| 98 | |
| 99 | if (integer) |
| 100 | /* Pseudo-denormal. */ |
| 101 | fputs_filtered (" Pseudo-denormal", file); |
| 102 | else if (fraction[0] || fraction[1]) |
| 103 | /* Denormal. */ |
| 104 | fputs_filtered (" Denormal", file); |
| 105 | } |
| 106 | else |
| 107 | /* Unsupported. */ |
| 108 | fputs_filtered (" Unsupported", file); |
| 109 | } |
| 110 | |
| 111 | /* Print the status word STATUS. If STATUS_P is false, then STATUS |
| 112 | was unavailable. */ |
| 113 | |
| 114 | static void |
| 115 | print_i387_status_word (int status_p, |
| 116 | unsigned int status, struct ui_file *file) |
| 117 | { |
| 118 | fprintf_filtered (file, "Status Word: "); |
| 119 | if (!status_p) |
| 120 | { |
| 121 | fprintf_filtered (file, "%s\n", _("<unavailable>")); |
| 122 | return; |
| 123 | } |
| 124 | |
| 125 | fprintf_filtered (file, "%s", hex_string_custom (status, 4)); |
| 126 | fputs_filtered (" ", file); |
| 127 | fprintf_filtered (file, " %s", (status & 0x0001) ? "IE" : " "); |
| 128 | fprintf_filtered (file, " %s", (status & 0x0002) ? "DE" : " "); |
| 129 | fprintf_filtered (file, " %s", (status & 0x0004) ? "ZE" : " "); |
| 130 | fprintf_filtered (file, " %s", (status & 0x0008) ? "OE" : " "); |
| 131 | fprintf_filtered (file, " %s", (status & 0x0010) ? "UE" : " "); |
| 132 | fprintf_filtered (file, " %s", (status & 0x0020) ? "PE" : " "); |
| 133 | fputs_filtered (" ", file); |
| 134 | fprintf_filtered (file, " %s", (status & 0x0080) ? "ES" : " "); |
| 135 | fputs_filtered (" ", file); |
| 136 | fprintf_filtered (file, " %s", (status & 0x0040) ? "SF" : " "); |
| 137 | fputs_filtered (" ", file); |
| 138 | fprintf_filtered (file, " %s", (status & 0x0100) ? "C0" : " "); |
| 139 | fprintf_filtered (file, " %s", (status & 0x0200) ? "C1" : " "); |
| 140 | fprintf_filtered (file, " %s", (status & 0x0400) ? "C2" : " "); |
| 141 | fprintf_filtered (file, " %s", (status & 0x4000) ? "C3" : " "); |
| 142 | |
| 143 | fputs_filtered ("\n", file); |
| 144 | |
| 145 | fprintf_filtered (file, |
| 146 | " TOP: %d\n", ((status >> 11) & 7)); |
| 147 | } |
| 148 | |
| 149 | /* Print the control word CONTROL. If CONTROL_P is false, then |
| 150 | CONTROL was unavailable. */ |
| 151 | |
| 152 | static void |
| 153 | print_i387_control_word (int control_p, |
| 154 | unsigned int control, struct ui_file *file) |
| 155 | { |
| 156 | fprintf_filtered (file, "Control Word: "); |
| 157 | if (!control_p) |
| 158 | { |
| 159 | fprintf_filtered (file, "%s\n", _("<unavailable>")); |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | fprintf_filtered (file, "%s", hex_string_custom (control, 4)); |
| 164 | fputs_filtered (" ", file); |
| 165 | fprintf_filtered (file, " %s", (control & 0x0001) ? "IM" : " "); |
| 166 | fprintf_filtered (file, " %s", (control & 0x0002) ? "DM" : " "); |
| 167 | fprintf_filtered (file, " %s", (control & 0x0004) ? "ZM" : " "); |
| 168 | fprintf_filtered (file, " %s", (control & 0x0008) ? "OM" : " "); |
| 169 | fprintf_filtered (file, " %s", (control & 0x0010) ? "UM" : " "); |
| 170 | fprintf_filtered (file, " %s", (control & 0x0020) ? "PM" : " "); |
| 171 | |
| 172 | fputs_filtered ("\n", file); |
| 173 | |
| 174 | fputs_filtered (" PC: ", file); |
| 175 | switch ((control >> 8) & 3) |
| 176 | { |
| 177 | case 0: |
| 178 | fputs_filtered ("Single Precision (24-bits)\n", file); |
| 179 | break; |
| 180 | case 1: |
| 181 | fputs_filtered ("Reserved\n", file); |
| 182 | break; |
| 183 | case 2: |
| 184 | fputs_filtered ("Double Precision (53-bits)\n", file); |
| 185 | break; |
| 186 | case 3: |
| 187 | fputs_filtered ("Extended Precision (64-bits)\n", file); |
| 188 | break; |
| 189 | } |
| 190 | |
| 191 | fputs_filtered (" RC: ", file); |
| 192 | switch ((control >> 10) & 3) |
| 193 | { |
| 194 | case 0: |
| 195 | fputs_filtered ("Round to nearest\n", file); |
| 196 | break; |
| 197 | case 1: |
| 198 | fputs_filtered ("Round down\n", file); |
| 199 | break; |
| 200 | case 2: |
| 201 | fputs_filtered ("Round up\n", file); |
| 202 | break; |
| 203 | case 3: |
| 204 | fputs_filtered ("Round toward zero\n", file); |
| 205 | break; |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /* Print out the i387 floating point state. Note that we ignore FRAME |
| 210 | in the code below. That's OK since floating-point registers are |
| 211 | never saved on the stack. */ |
| 212 | |
| 213 | void |
| 214 | i387_print_float_info (struct gdbarch *gdbarch, struct ui_file *file, |
| 215 | struct frame_info *frame, const char *args) |
| 216 | { |
| 217 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_frame_arch (frame)); |
| 218 | ULONGEST fctrl; |
| 219 | int fctrl_p; |
| 220 | ULONGEST fstat; |
| 221 | int fstat_p; |
| 222 | ULONGEST ftag; |
| 223 | int ftag_p; |
| 224 | ULONGEST fiseg; |
| 225 | int fiseg_p; |
| 226 | ULONGEST fioff; |
| 227 | int fioff_p; |
| 228 | ULONGEST foseg; |
| 229 | int foseg_p; |
| 230 | ULONGEST fooff; |
| 231 | int fooff_p; |
| 232 | ULONGEST fop; |
| 233 | int fop_p; |
| 234 | int fpreg; |
| 235 | int top; |
| 236 | |
| 237 | gdb_assert (gdbarch == get_frame_arch (frame)); |
| 238 | |
| 239 | fctrl_p = read_frame_register_unsigned (frame, |
| 240 | I387_FCTRL_REGNUM (tdep), &fctrl); |
| 241 | fstat_p = read_frame_register_unsigned (frame, |
| 242 | I387_FSTAT_REGNUM (tdep), &fstat); |
| 243 | ftag_p = read_frame_register_unsigned (frame, |
| 244 | I387_FTAG_REGNUM (tdep), &ftag); |
| 245 | fiseg_p = read_frame_register_unsigned (frame, |
| 246 | I387_FISEG_REGNUM (tdep), &fiseg); |
| 247 | fioff_p = read_frame_register_unsigned (frame, |
| 248 | I387_FIOFF_REGNUM (tdep), &fioff); |
| 249 | foseg_p = read_frame_register_unsigned (frame, |
| 250 | I387_FOSEG_REGNUM (tdep), &foseg); |
| 251 | fooff_p = read_frame_register_unsigned (frame, |
| 252 | I387_FOOFF_REGNUM (tdep), &fooff); |
| 253 | fop_p = read_frame_register_unsigned (frame, |
| 254 | I387_FOP_REGNUM (tdep), &fop); |
| 255 | |
| 256 | if (fstat_p) |
| 257 | { |
| 258 | top = ((fstat >> 11) & 7); |
| 259 | |
| 260 | for (fpreg = 7; fpreg >= 0; fpreg--) |
| 261 | { |
| 262 | struct value *regval; |
| 263 | int regnum; |
| 264 | int i; |
| 265 | int tag = -1; |
| 266 | |
| 267 | fprintf_filtered (file, "%sR%d: ", fpreg == top ? "=>" : " ", fpreg); |
| 268 | |
| 269 | if (ftag_p) |
| 270 | { |
| 271 | tag = (ftag >> (fpreg * 2)) & 3; |
| 272 | |
| 273 | switch (tag) |
| 274 | { |
| 275 | case 0: |
| 276 | fputs_filtered ("Valid ", file); |
| 277 | break; |
| 278 | case 1: |
| 279 | fputs_filtered ("Zero ", file); |
| 280 | break; |
| 281 | case 2: |
| 282 | fputs_filtered ("Special ", file); |
| 283 | break; |
| 284 | case 3: |
| 285 | fputs_filtered ("Empty ", file); |
| 286 | break; |
| 287 | } |
| 288 | } |
| 289 | else |
| 290 | fputs_filtered ("Unknown ", file); |
| 291 | |
| 292 | regnum = (fpreg + 8 - top) % 8 + I387_ST0_REGNUM (tdep); |
| 293 | regval = get_frame_register_value (frame, regnum); |
| 294 | |
| 295 | if (value_entirely_available (regval)) |
| 296 | { |
| 297 | const gdb_byte *raw = value_contents (regval); |
| 298 | |
| 299 | fputs_filtered ("0x", file); |
| 300 | for (i = 9; i >= 0; i--) |
| 301 | fprintf_filtered (file, "%02x", raw[i]); |
| 302 | |
| 303 | if (tag != -1 && tag != 3) |
| 304 | print_i387_ext (gdbarch, raw, file); |
| 305 | } |
| 306 | else |
| 307 | fprintf_filtered (file, "%s", _("<unavailable>")); |
| 308 | |
| 309 | fputs_filtered ("\n", file); |
| 310 | } |
| 311 | } |
| 312 | |
| 313 | fputs_filtered ("\n", file); |
| 314 | print_i387_status_word (fstat_p, fstat, file); |
| 315 | print_i387_control_word (fctrl_p, fctrl, file); |
| 316 | fprintf_filtered (file, "Tag Word: %s\n", |
| 317 | ftag_p ? hex_string_custom (ftag, 4) : _("<unavailable>")); |
| 318 | fprintf_filtered (file, "Instruction Pointer: %s:", |
| 319 | fiseg_p ? hex_string_custom (fiseg, 2) : _("<unavailable>")); |
| 320 | fprintf_filtered (file, "%s\n", |
| 321 | fioff_p ? hex_string_custom (fioff, 8) : _("<unavailable>")); |
| 322 | fprintf_filtered (file, "Operand Pointer: %s:", |
| 323 | foseg_p ? hex_string_custom (foseg, 2) : _("<unavailable>")); |
| 324 | fprintf_filtered (file, "%s\n", |
| 325 | fooff_p ? hex_string_custom (fooff, 8) : _("<unavailable>")); |
| 326 | fprintf_filtered (file, "Opcode: %s\n", |
| 327 | fop_p |
| 328 | ? (hex_string_custom (fop ? (fop | 0xd800) : 0, 4)) |
| 329 | : _("<unavailable>")); |
| 330 | } |
| 331 | \f |
| 332 | |
| 333 | /* Return nonzero if a value of type TYPE stored in register REGNUM |
| 334 | needs any special handling. */ |
| 335 | |
| 336 | int |
| 337 | i387_convert_register_p (struct gdbarch *gdbarch, int regnum, |
| 338 | struct type *type) |
| 339 | { |
| 340 | if (i386_fp_regnum_p (gdbarch, regnum)) |
| 341 | { |
| 342 | /* Floating point registers must be converted unless we are |
| 343 | accessing them in their hardware type or TYPE is not float. */ |
| 344 | if (type == i387_ext_type (gdbarch) |
| 345 | || TYPE_CODE (type) != TYPE_CODE_FLT) |
| 346 | return 0; |
| 347 | else |
| 348 | return 1; |
| 349 | } |
| 350 | |
| 351 | return 0; |
| 352 | } |
| 353 | |
| 354 | /* Read a value of type TYPE from register REGNUM in frame FRAME, and |
| 355 | return its contents in TO. */ |
| 356 | |
| 357 | int |
| 358 | i387_register_to_value (struct frame_info *frame, int regnum, |
| 359 | struct type *type, gdb_byte *to, |
| 360 | int *optimizedp, int *unavailablep) |
| 361 | { |
| 362 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 363 | gdb_byte from[I386_MAX_REGISTER_SIZE]; |
| 364 | |
| 365 | gdb_assert (i386_fp_regnum_p (gdbarch, regnum)); |
| 366 | |
| 367 | /* We only support floating-point values. */ |
| 368 | if (TYPE_CODE (type) != TYPE_CODE_FLT) |
| 369 | { |
| 370 | warning (_("Cannot convert floating-point register value " |
| 371 | "to non-floating-point type.")); |
| 372 | *optimizedp = *unavailablep = 0; |
| 373 | return 0; |
| 374 | } |
| 375 | |
| 376 | /* Convert to TYPE. */ |
| 377 | if (!get_frame_register_bytes (frame, regnum, 0, |
| 378 | register_size (gdbarch, regnum), |
| 379 | from, optimizedp, unavailablep)) |
| 380 | return 0; |
| 381 | |
| 382 | convert_typed_floating (from, i387_ext_type (gdbarch), to, type); |
| 383 | *optimizedp = *unavailablep = 0; |
| 384 | return 1; |
| 385 | } |
| 386 | |
| 387 | /* Write the contents FROM of a value of type TYPE into register |
| 388 | REGNUM in frame FRAME. */ |
| 389 | |
| 390 | void |
| 391 | i387_value_to_register (struct frame_info *frame, int regnum, |
| 392 | struct type *type, const gdb_byte *from) |
| 393 | { |
| 394 | struct gdbarch *gdbarch = get_frame_arch (frame); |
| 395 | gdb_byte to[I386_MAX_REGISTER_SIZE]; |
| 396 | |
| 397 | gdb_assert (i386_fp_regnum_p (gdbarch, regnum)); |
| 398 | |
| 399 | /* We only support floating-point values. */ |
| 400 | if (TYPE_CODE (type) != TYPE_CODE_FLT) |
| 401 | { |
| 402 | warning (_("Cannot convert non-floating-point type " |
| 403 | "to floating-point register value.")); |
| 404 | return; |
| 405 | } |
| 406 | |
| 407 | /* Convert from TYPE. */ |
| 408 | convert_typed_floating (from, type, to, i387_ext_type (gdbarch)); |
| 409 | put_frame_register (frame, regnum, to); |
| 410 | } |
| 411 | \f |
| 412 | |
| 413 | /* Handle FSAVE and FXSAVE formats. */ |
| 414 | |
| 415 | /* At fsave_offset[REGNUM] you'll find the offset to the location in |
| 416 | the data structure used by the "fsave" instruction where GDB |
| 417 | register REGNUM is stored. */ |
| 418 | |
| 419 | static int fsave_offset[] = |
| 420 | { |
| 421 | 28 + 0 * 10, /* %st(0) ... */ |
| 422 | 28 + 1 * 10, |
| 423 | 28 + 2 * 10, |
| 424 | 28 + 3 * 10, |
| 425 | 28 + 4 * 10, |
| 426 | 28 + 5 * 10, |
| 427 | 28 + 6 * 10, |
| 428 | 28 + 7 * 10, /* ... %st(7). */ |
| 429 | 0, /* `fctrl' (16 bits). */ |
| 430 | 4, /* `fstat' (16 bits). */ |
| 431 | 8, /* `ftag' (16 bits). */ |
| 432 | 16, /* `fiseg' (16 bits). */ |
| 433 | 12, /* `fioff'. */ |
| 434 | 24, /* `foseg' (16 bits). */ |
| 435 | 20, /* `fooff'. */ |
| 436 | 18 /* `fop' (bottom 11 bits). */ |
| 437 | }; |
| 438 | |
| 439 | #define FSAVE_ADDR(tdep, fsave, regnum) \ |
| 440 | (fsave + fsave_offset[regnum - I387_ST0_REGNUM (tdep)]) |
| 441 | \f |
| 442 | |
| 443 | /* Fill register REGNUM in REGCACHE with the appropriate value from |
| 444 | *FSAVE. This function masks off any of the reserved bits in |
| 445 | *FSAVE. */ |
| 446 | |
| 447 | void |
| 448 | i387_supply_fsave (struct regcache *regcache, int regnum, const void *fsave) |
| 449 | { |
| 450 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 451 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 452 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 453 | const gdb_byte *regs = (const gdb_byte *) fsave; |
| 454 | int i; |
| 455 | |
| 456 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 457 | |
| 458 | for (i = I387_ST0_REGNUM (tdep); i < I387_XMM0_REGNUM (tdep); i++) |
| 459 | if (regnum == -1 || regnum == i) |
| 460 | { |
| 461 | if (fsave == NULL) |
| 462 | { |
| 463 | regcache_raw_supply (regcache, i, NULL); |
| 464 | continue; |
| 465 | } |
| 466 | |
| 467 | /* Most of the FPU control registers occupy only 16 bits in the |
| 468 | fsave area. Give those a special treatment. */ |
| 469 | if (i >= I387_FCTRL_REGNUM (tdep) |
| 470 | && i != I387_FIOFF_REGNUM (tdep) && i != I387_FOOFF_REGNUM (tdep)) |
| 471 | { |
| 472 | gdb_byte val[4]; |
| 473 | |
| 474 | memcpy (val, FSAVE_ADDR (tdep, regs, i), 2); |
| 475 | val[2] = val[3] = 0; |
| 476 | if (i == I387_FOP_REGNUM (tdep)) |
| 477 | val[1] &= ((1 << 3) - 1); |
| 478 | regcache_raw_supply (regcache, i, val); |
| 479 | } |
| 480 | else |
| 481 | regcache_raw_supply (regcache, i, FSAVE_ADDR (tdep, regs, i)); |
| 482 | } |
| 483 | |
| 484 | /* Provide dummy values for the SSE registers. */ |
| 485 | for (i = I387_XMM0_REGNUM (tdep); i < I387_MXCSR_REGNUM (tdep); i++) |
| 486 | if (regnum == -1 || regnum == i) |
| 487 | regcache_raw_supply (regcache, i, NULL); |
| 488 | if (regnum == -1 || regnum == I387_MXCSR_REGNUM (tdep)) |
| 489 | { |
| 490 | gdb_byte buf[4]; |
| 491 | |
| 492 | store_unsigned_integer (buf, 4, byte_order, 0x1f80); |
| 493 | regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep), buf); |
| 494 | } |
| 495 | } |
| 496 | |
| 497 | /* Fill register REGNUM (if it is a floating-point register) in *FSAVE |
| 498 | with the value from REGCACHE. If REGNUM is -1, do this for all |
| 499 | registers. This function doesn't touch any of the reserved bits in |
| 500 | *FSAVE. */ |
| 501 | |
| 502 | void |
| 503 | i387_collect_fsave (const struct regcache *regcache, int regnum, void *fsave) |
| 504 | { |
| 505 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 506 | gdb_byte *regs = (gdb_byte *) fsave; |
| 507 | int i; |
| 508 | |
| 509 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 510 | |
| 511 | for (i = I387_ST0_REGNUM (tdep); i < I387_XMM0_REGNUM (tdep); i++) |
| 512 | if (regnum == -1 || regnum == i) |
| 513 | { |
| 514 | /* Most of the FPU control registers occupy only 16 bits in |
| 515 | the fsave area. Give those a special treatment. */ |
| 516 | if (i >= I387_FCTRL_REGNUM (tdep) |
| 517 | && i != I387_FIOFF_REGNUM (tdep) && i != I387_FOOFF_REGNUM (tdep)) |
| 518 | { |
| 519 | gdb_byte buf[4]; |
| 520 | |
| 521 | regcache_raw_collect (regcache, i, buf); |
| 522 | |
| 523 | if (i == I387_FOP_REGNUM (tdep)) |
| 524 | { |
| 525 | /* The opcode occupies only 11 bits. Make sure we |
| 526 | don't touch the other bits. */ |
| 527 | buf[1] &= ((1 << 3) - 1); |
| 528 | buf[1] |= ((FSAVE_ADDR (tdep, regs, i))[1] & ~((1 << 3) - 1)); |
| 529 | } |
| 530 | memcpy (FSAVE_ADDR (tdep, regs, i), buf, 2); |
| 531 | } |
| 532 | else |
| 533 | regcache_raw_collect (regcache, i, FSAVE_ADDR (tdep, regs, i)); |
| 534 | } |
| 535 | } |
| 536 | \f |
| 537 | |
| 538 | /* At fxsave_offset[REGNUM] you'll find the offset to the location in |
| 539 | the data structure used by the "fxsave" instruction where GDB |
| 540 | register REGNUM is stored. */ |
| 541 | |
| 542 | static int fxsave_offset[] = |
| 543 | { |
| 544 | 32, /* %st(0) through ... */ |
| 545 | 48, |
| 546 | 64, |
| 547 | 80, |
| 548 | 96, |
| 549 | 112, |
| 550 | 128, |
| 551 | 144, /* ... %st(7) (80 bits each). */ |
| 552 | 0, /* `fctrl' (16 bits). */ |
| 553 | 2, /* `fstat' (16 bits). */ |
| 554 | 4, /* `ftag' (16 bits). */ |
| 555 | 12, /* `fiseg' (16 bits). */ |
| 556 | 8, /* `fioff'. */ |
| 557 | 20, /* `foseg' (16 bits). */ |
| 558 | 16, /* `fooff'. */ |
| 559 | 6, /* `fop' (bottom 11 bits). */ |
| 560 | 160 + 0 * 16, /* %xmm0 through ... */ |
| 561 | 160 + 1 * 16, |
| 562 | 160 + 2 * 16, |
| 563 | 160 + 3 * 16, |
| 564 | 160 + 4 * 16, |
| 565 | 160 + 5 * 16, |
| 566 | 160 + 6 * 16, |
| 567 | 160 + 7 * 16, |
| 568 | 160 + 8 * 16, |
| 569 | 160 + 9 * 16, |
| 570 | 160 + 10 * 16, |
| 571 | 160 + 11 * 16, |
| 572 | 160 + 12 * 16, |
| 573 | 160 + 13 * 16, |
| 574 | 160 + 14 * 16, |
| 575 | 160 + 15 * 16, /* ... %xmm15 (128 bits each). */ |
| 576 | }; |
| 577 | |
| 578 | #define FXSAVE_ADDR(tdep, fxsave, regnum) \ |
| 579 | (fxsave + fxsave_offset[regnum - I387_ST0_REGNUM (tdep)]) |
| 580 | |
| 581 | /* We made an unfortunate choice in putting %mxcsr after the SSE |
| 582 | registers %xmm0-%xmm7 instead of before, since it makes supporting |
| 583 | the registers %xmm8-%xmm15 on AMD64 a bit involved. Therefore we |
| 584 | don't include the offset for %mxcsr here above. */ |
| 585 | |
| 586 | #define FXSAVE_MXCSR_ADDR(fxsave) (fxsave + 24) |
| 587 | |
| 588 | static int i387_tag (const gdb_byte *raw); |
| 589 | \f |
| 590 | |
| 591 | /* Fill register REGNUM in REGCACHE with the appropriate |
| 592 | floating-point or SSE register value from *FXSAVE. This function |
| 593 | masks off any of the reserved bits in *FXSAVE. */ |
| 594 | |
| 595 | void |
| 596 | i387_supply_fxsave (struct regcache *regcache, int regnum, const void *fxsave) |
| 597 | { |
| 598 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 599 | const gdb_byte *regs = (const gdb_byte *) fxsave; |
| 600 | int i; |
| 601 | |
| 602 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 603 | gdb_assert (tdep->num_xmm_regs > 0); |
| 604 | |
| 605 | for (i = I387_ST0_REGNUM (tdep); i < I387_MXCSR_REGNUM (tdep); i++) |
| 606 | if (regnum == -1 || regnum == i) |
| 607 | { |
| 608 | if (regs == NULL) |
| 609 | { |
| 610 | regcache_raw_supply (regcache, i, NULL); |
| 611 | continue; |
| 612 | } |
| 613 | |
| 614 | /* Most of the FPU control registers occupy only 16 bits in |
| 615 | the fxsave area. Give those a special treatment. */ |
| 616 | if (i >= I387_FCTRL_REGNUM (tdep) && i < I387_XMM0_REGNUM (tdep) |
| 617 | && i != I387_FIOFF_REGNUM (tdep) && i != I387_FOOFF_REGNUM (tdep)) |
| 618 | { |
| 619 | gdb_byte val[4]; |
| 620 | |
| 621 | memcpy (val, FXSAVE_ADDR (tdep, regs, i), 2); |
| 622 | val[2] = val[3] = 0; |
| 623 | if (i == I387_FOP_REGNUM (tdep)) |
| 624 | val[1] &= ((1 << 3) - 1); |
| 625 | else if (i== I387_FTAG_REGNUM (tdep)) |
| 626 | { |
| 627 | /* The fxsave area contains a simplified version of |
| 628 | the tag word. We have to look at the actual 80-bit |
| 629 | FP data to recreate the traditional i387 tag word. */ |
| 630 | |
| 631 | unsigned long ftag = 0; |
| 632 | int fpreg; |
| 633 | int top; |
| 634 | |
| 635 | top = ((FXSAVE_ADDR (tdep, regs, |
| 636 | I387_FSTAT_REGNUM (tdep)))[1] >> 3); |
| 637 | top &= 0x7; |
| 638 | |
| 639 | for (fpreg = 7; fpreg >= 0; fpreg--) |
| 640 | { |
| 641 | int tag; |
| 642 | |
| 643 | if (val[0] & (1 << fpreg)) |
| 644 | { |
| 645 | int thisreg = (fpreg + 8 - top) % 8 |
| 646 | + I387_ST0_REGNUM (tdep); |
| 647 | tag = i387_tag (FXSAVE_ADDR (tdep, regs, thisreg)); |
| 648 | } |
| 649 | else |
| 650 | tag = 3; /* Empty */ |
| 651 | |
| 652 | ftag |= tag << (2 * fpreg); |
| 653 | } |
| 654 | val[0] = ftag & 0xff; |
| 655 | val[1] = (ftag >> 8) & 0xff; |
| 656 | } |
| 657 | regcache_raw_supply (regcache, i, val); |
| 658 | } |
| 659 | else |
| 660 | regcache_raw_supply (regcache, i, FXSAVE_ADDR (tdep, regs, i)); |
| 661 | } |
| 662 | |
| 663 | if (regnum == I387_MXCSR_REGNUM (tdep) || regnum == -1) |
| 664 | { |
| 665 | if (regs == NULL) |
| 666 | regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep), NULL); |
| 667 | else |
| 668 | regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep), |
| 669 | FXSAVE_MXCSR_ADDR (regs)); |
| 670 | } |
| 671 | } |
| 672 | |
| 673 | /* Fill register REGNUM (if it is a floating-point or SSE register) in |
| 674 | *FXSAVE with the value from REGCACHE. If REGNUM is -1, do this for |
| 675 | all registers. This function doesn't touch any of the reserved |
| 676 | bits in *FXSAVE. */ |
| 677 | |
| 678 | void |
| 679 | i387_collect_fxsave (const struct regcache *regcache, int regnum, void *fxsave) |
| 680 | { |
| 681 | struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); |
| 682 | gdb_byte *regs = (gdb_byte *) fxsave; |
| 683 | int i; |
| 684 | |
| 685 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 686 | gdb_assert (tdep->num_xmm_regs > 0); |
| 687 | |
| 688 | for (i = I387_ST0_REGNUM (tdep); i < I387_MXCSR_REGNUM (tdep); i++) |
| 689 | if (regnum == -1 || regnum == i) |
| 690 | { |
| 691 | /* Most of the FPU control registers occupy only 16 bits in |
| 692 | the fxsave area. Give those a special treatment. */ |
| 693 | if (i >= I387_FCTRL_REGNUM (tdep) && i < I387_XMM0_REGNUM (tdep) |
| 694 | && i != I387_FIOFF_REGNUM (tdep) && i != I387_FOOFF_REGNUM (tdep)) |
| 695 | { |
| 696 | gdb_byte buf[4]; |
| 697 | |
| 698 | regcache_raw_collect (regcache, i, buf); |
| 699 | |
| 700 | if (i == I387_FOP_REGNUM (tdep)) |
| 701 | { |
| 702 | /* The opcode occupies only 11 bits. Make sure we |
| 703 | don't touch the other bits. */ |
| 704 | buf[1] &= ((1 << 3) - 1); |
| 705 | buf[1] |= ((FXSAVE_ADDR (tdep, regs, i))[1] & ~((1 << 3) - 1)); |
| 706 | } |
| 707 | else if (i == I387_FTAG_REGNUM (tdep)) |
| 708 | { |
| 709 | /* Converting back is much easier. */ |
| 710 | |
| 711 | unsigned short ftag; |
| 712 | int fpreg; |
| 713 | |
| 714 | ftag = (buf[1] << 8) | buf[0]; |
| 715 | buf[0] = 0; |
| 716 | buf[1] = 0; |
| 717 | |
| 718 | for (fpreg = 7; fpreg >= 0; fpreg--) |
| 719 | { |
| 720 | int tag = (ftag >> (fpreg * 2)) & 3; |
| 721 | |
| 722 | if (tag != 3) |
| 723 | buf[0] |= (1 << fpreg); |
| 724 | } |
| 725 | } |
| 726 | memcpy (FXSAVE_ADDR (tdep, regs, i), buf, 2); |
| 727 | } |
| 728 | else |
| 729 | regcache_raw_collect (regcache, i, FXSAVE_ADDR (tdep, regs, i)); |
| 730 | } |
| 731 | |
| 732 | if (regnum == I387_MXCSR_REGNUM (tdep) || regnum == -1) |
| 733 | regcache_raw_collect (regcache, I387_MXCSR_REGNUM (tdep), |
| 734 | FXSAVE_MXCSR_ADDR (regs)); |
| 735 | } |
| 736 | |
| 737 | /* `xstate_bv' is at byte offset 512. */ |
| 738 | #define XSAVE_XSTATE_BV_ADDR(xsave) (xsave + 512) |
| 739 | |
| 740 | /* At xsave_avxh_offset[REGNUM] you'll find the offset to the location in |
| 741 | the upper 128bit of AVX register data structure used by the "xsave" |
| 742 | instruction where GDB register REGNUM is stored. */ |
| 743 | |
| 744 | static int xsave_avxh_offset[] = |
| 745 | { |
| 746 | 576 + 0 * 16, /* Upper 128bit of %ymm0 through ... */ |
| 747 | 576 + 1 * 16, |
| 748 | 576 + 2 * 16, |
| 749 | 576 + 3 * 16, |
| 750 | 576 + 4 * 16, |
| 751 | 576 + 5 * 16, |
| 752 | 576 + 6 * 16, |
| 753 | 576 + 7 * 16, |
| 754 | 576 + 8 * 16, |
| 755 | 576 + 9 * 16, |
| 756 | 576 + 10 * 16, |
| 757 | 576 + 11 * 16, |
| 758 | 576 + 12 * 16, |
| 759 | 576 + 13 * 16, |
| 760 | 576 + 14 * 16, |
| 761 | 576 + 15 * 16 /* Upper 128bit of ... %ymm15 (128 bits each). */ |
| 762 | }; |
| 763 | |
| 764 | #define XSAVE_AVXH_ADDR(tdep, xsave, regnum) \ |
| 765 | (xsave + xsave_avxh_offset[regnum - I387_YMM0H_REGNUM (tdep)]) |
| 766 | |
| 767 | /* At xsave_ymm_avx512_offset[REGNUM] you'll find the offset to the location in |
| 768 | the upper 128bit of ZMM register data structure used by the "xsave" |
| 769 | instruction where GDB register REGNUM is stored. */ |
| 770 | |
| 771 | static int xsave_ymm_avx512_offset[] = |
| 772 | { |
| 773 | /* HI16_ZMM_area + 16 bytes + regnum* 64 bytes. */ |
| 774 | 1664 + 16 + 0 * 64, /* %ymm16 through... */ |
| 775 | 1664 + 16 + 1 * 64, |
| 776 | 1664 + 16 + 2 * 64, |
| 777 | 1664 + 16 + 3 * 64, |
| 778 | 1664 + 16 + 4 * 64, |
| 779 | 1664 + 16 + 5 * 64, |
| 780 | 1664 + 16 + 6 * 64, |
| 781 | 1664 + 16 + 7 * 64, |
| 782 | 1664 + 16 + 8 * 64, |
| 783 | 1664 + 16 + 9 * 64, |
| 784 | 1664 + 16 + 10 * 64, |
| 785 | 1664 + 16 + 11 * 64, |
| 786 | 1664 + 16 + 12 * 64, |
| 787 | 1664 + 16 + 13 * 64, |
| 788 | 1664 + 16 + 14 * 64, |
| 789 | 1664 + 16 + 15 * 64 /* ... %ymm31 (128 bits each). */ |
| 790 | }; |
| 791 | |
| 792 | #define XSAVE_YMM_AVX512_ADDR(tdep, xsave, regnum) \ |
| 793 | (xsave + xsave_ymm_avx512_offset[regnum - I387_YMM16H_REGNUM (tdep)]) |
| 794 | |
| 795 | static int xsave_xmm_avx512_offset[] = |
| 796 | { |
| 797 | 1664 + 0 * 64, /* %ymm16 through... */ |
| 798 | 1664 + 1 * 64, |
| 799 | 1664 + 2 * 64, |
| 800 | 1664 + 3 * 64, |
| 801 | 1664 + 4 * 64, |
| 802 | 1664 + 5 * 64, |
| 803 | 1664 + 6 * 64, |
| 804 | 1664 + 7 * 64, |
| 805 | 1664 + 8 * 64, |
| 806 | 1664 + 9 * 64, |
| 807 | 1664 + 10 * 64, |
| 808 | 1664 + 11 * 64, |
| 809 | 1664 + 12 * 64, |
| 810 | 1664 + 13 * 64, |
| 811 | 1664 + 14 * 64, |
| 812 | 1664 + 15 * 64 /* ... %ymm31 (128 bits each). */ |
| 813 | }; |
| 814 | |
| 815 | #define XSAVE_XMM_AVX512_ADDR(tdep, xsave, regnum) \ |
| 816 | (xsave + xsave_xmm_avx512_offset[regnum - I387_XMM16_REGNUM (tdep)]) |
| 817 | |
| 818 | static int xsave_mpx_offset[] = { |
| 819 | 960 + 0 * 16, /* bnd0r...bnd3r registers. */ |
| 820 | 960 + 1 * 16, |
| 821 | 960 + 2 * 16, |
| 822 | 960 + 3 * 16, |
| 823 | 1024 + 0 * 8, /* bndcfg ... bndstatus. */ |
| 824 | 1024 + 1 * 8, |
| 825 | }; |
| 826 | |
| 827 | #define XSAVE_MPX_ADDR(tdep, xsave, regnum) \ |
| 828 | (xsave + xsave_mpx_offset[regnum - I387_BND0R_REGNUM (tdep)]) |
| 829 | |
| 830 | /* At xsave_avx512__h_offset[REGNUM] you find the offset to the location |
| 831 | of the AVX512 opmask register data structure used by the "xsave" |
| 832 | instruction where GDB register REGNUM is stored. */ |
| 833 | |
| 834 | static int xsave_avx512_k_offset[] = |
| 835 | { |
| 836 | 1088 + 0 * 8, /* %k0 through... */ |
| 837 | 1088 + 1 * 8, |
| 838 | 1088 + 2 * 8, |
| 839 | 1088 + 3 * 8, |
| 840 | 1088 + 4 * 8, |
| 841 | 1088 + 5 * 8, |
| 842 | 1088 + 6 * 8, |
| 843 | 1088 + 7 * 8 /* %k7 (64 bits each). */ |
| 844 | }; |
| 845 | |
| 846 | #define XSAVE_AVX512_K_ADDR(tdep, xsave, regnum) \ |
| 847 | (xsave + xsave_avx512_k_offset[regnum - I387_K0_REGNUM (tdep)]) |
| 848 | |
| 849 | /* At xsave_avx512_zmm_h_offset[REGNUM] you find the offset to the location in |
| 850 | the upper 256bit of AVX512 ZMMH register data structure used by the "xsave" |
| 851 | instruction where GDB register REGNUM is stored. */ |
| 852 | |
| 853 | static int xsave_avx512_zmm_h_offset[] = |
| 854 | { |
| 855 | 1152 + 0 * 32, |
| 856 | 1152 + 1 * 32, /* Upper 256bit of %zmmh0 through... */ |
| 857 | 1152 + 2 * 32, |
| 858 | 1152 + 3 * 32, |
| 859 | 1152 + 4 * 32, |
| 860 | 1152 + 5 * 32, |
| 861 | 1152 + 6 * 32, |
| 862 | 1152 + 7 * 32, |
| 863 | 1152 + 8 * 32, |
| 864 | 1152 + 9 * 32, |
| 865 | 1152 + 10 * 32, |
| 866 | 1152 + 11 * 32, |
| 867 | 1152 + 12 * 32, |
| 868 | 1152 + 13 * 32, |
| 869 | 1152 + 14 * 32, |
| 870 | 1152 + 15 * 32, /* Upper 256bit of... %zmmh15 (256 bits each). */ |
| 871 | 1664 + 32 + 0 * 64, /* Upper 256bit of... %zmmh16 (256 bits each). */ |
| 872 | 1664 + 32 + 1 * 64, |
| 873 | 1664 + 32 + 2 * 64, |
| 874 | 1664 + 32 + 3 * 64, |
| 875 | 1664 + 32 + 4 * 64, |
| 876 | 1664 + 32 + 5 * 64, |
| 877 | 1664 + 32 + 6 * 64, |
| 878 | 1664 + 32 + 7 * 64, |
| 879 | 1664 + 32 + 8 * 64, |
| 880 | 1664 + 32 + 9 * 64, |
| 881 | 1664 + 32 + 10 * 64, |
| 882 | 1664 + 32 + 11 * 64, |
| 883 | 1664 + 32 + 12 * 64, |
| 884 | 1664 + 32 + 13 * 64, |
| 885 | 1664 + 32 + 14 * 64, |
| 886 | 1664 + 32 + 15 * 64 /* Upper 256bit of... %zmmh31 (256 bits each). */ |
| 887 | }; |
| 888 | |
| 889 | #define XSAVE_AVX512_ZMM_H_ADDR(tdep, xsave, regnum) \ |
| 890 | (xsave + xsave_avx512_zmm_h_offset[regnum - I387_ZMM0H_REGNUM (tdep)]) |
| 891 | |
| 892 | /* At xsave_pkeys_offset[REGNUM] you find the offset to the location |
| 893 | of the PKRU register data structure used by the "xsave" |
| 894 | instruction where GDB register REGNUM is stored. */ |
| 895 | |
| 896 | static int xsave_pkeys_offset[] = |
| 897 | { |
| 898 | 2688 + 0 * 8 /* %pkru (64 bits in XSTATE, 32-bit actually used by |
| 899 | instructions and applications). */ |
| 900 | }; |
| 901 | |
| 902 | #define XSAVE_PKEYS_ADDR(tdep, xsave, regnum) \ |
| 903 | (xsave + xsave_pkeys_offset[regnum - I387_PKRU_REGNUM (tdep)]) |
| 904 | |
| 905 | /* Similar to i387_supply_fxsave, but use XSAVE extended state. */ |
| 906 | |
| 907 | void |
| 908 | i387_supply_xsave (struct regcache *regcache, int regnum, |
| 909 | const void *xsave) |
| 910 | { |
| 911 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 912 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 913 | const gdb_byte *regs = (const gdb_byte *) xsave; |
| 914 | int i; |
| 915 | ULONGEST clear_bv; |
| 916 | static const gdb_byte zero[I386_MAX_REGISTER_SIZE] = { 0 }; |
| 917 | enum |
| 918 | { |
| 919 | none = 0x0, |
| 920 | x87 = 0x1, |
| 921 | sse = 0x2, |
| 922 | avxh = 0x4, |
| 923 | mpx = 0x8, |
| 924 | avx512_k = 0x10, |
| 925 | avx512_zmm_h = 0x20, |
| 926 | avx512_ymmh_avx512 = 0x40, |
| 927 | avx512_xmm_avx512 = 0x80, |
| 928 | pkeys = 0x100, |
| 929 | all = x87 | sse | avxh | mpx | avx512_k | avx512_zmm_h |
| 930 | | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys |
| 931 | } regclass; |
| 932 | |
| 933 | gdb_assert (regs != NULL); |
| 934 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 935 | gdb_assert (tdep->num_xmm_regs > 0); |
| 936 | |
| 937 | if (regnum == -1) |
| 938 | regclass = all; |
| 939 | else if (regnum >= I387_PKRU_REGNUM (tdep) |
| 940 | && regnum < I387_PKEYSEND_REGNUM (tdep)) |
| 941 | regclass = pkeys; |
| 942 | else if (regnum >= I387_ZMM0H_REGNUM (tdep) |
| 943 | && regnum < I387_ZMMENDH_REGNUM (tdep)) |
| 944 | regclass = avx512_zmm_h; |
| 945 | else if (regnum >= I387_K0_REGNUM (tdep) |
| 946 | && regnum < I387_KEND_REGNUM (tdep)) |
| 947 | regclass = avx512_k; |
| 948 | else if (regnum >= I387_YMM16H_REGNUM (tdep) |
| 949 | && regnum < I387_YMMH_AVX512_END_REGNUM (tdep)) |
| 950 | regclass = avx512_ymmh_avx512; |
| 951 | else if (regnum >= I387_XMM16_REGNUM (tdep) |
| 952 | && regnum < I387_XMM_AVX512_END_REGNUM (tdep)) |
| 953 | regclass = avx512_xmm_avx512; |
| 954 | else if (regnum >= I387_YMM0H_REGNUM (tdep) |
| 955 | && regnum < I387_YMMENDH_REGNUM (tdep)) |
| 956 | regclass = avxh; |
| 957 | else if (regnum >= I387_BND0R_REGNUM (tdep) |
| 958 | && regnum < I387_MPXEND_REGNUM (tdep)) |
| 959 | regclass = mpx; |
| 960 | else if (regnum >= I387_XMM0_REGNUM (tdep) |
| 961 | && regnum < I387_MXCSR_REGNUM (tdep)) |
| 962 | regclass = sse; |
| 963 | else if (regnum >= I387_ST0_REGNUM (tdep) |
| 964 | && regnum < I387_FCTRL_REGNUM (tdep)) |
| 965 | regclass = x87; |
| 966 | else |
| 967 | regclass = none; |
| 968 | |
| 969 | if (regclass != none) |
| 970 | { |
| 971 | /* Get `xstat_bv'. The supported bits in `xstat_bv' are 8 bytes. */ |
| 972 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 973 | ULONGEST xstate_bv = 0; |
| 974 | |
| 975 | xstate_bv = extract_unsigned_integer (XSAVE_XSTATE_BV_ADDR (regs), |
| 976 | 8, byte_order); |
| 977 | |
| 978 | /* Clear part in vector registers if its bit in xstat_bv is zero. */ |
| 979 | clear_bv = (~(xstate_bv)) & tdep->xcr0; |
| 980 | } |
| 981 | else |
| 982 | clear_bv = X86_XSTATE_ALL_MASK; |
| 983 | |
| 984 | /* With the delayed xsave mechanism, in between the program |
| 985 | starting, and the program accessing the vector registers for the |
| 986 | first time, the register's values are invalid. The kernel |
| 987 | initializes register states to zero when they are set the first |
| 988 | time in a program. This means that from the user-space programs' |
| 989 | perspective, it's the same as if the registers have always been |
| 990 | zero from the start of the program. Therefore, the debugger |
| 991 | should provide the same illusion to the user. */ |
| 992 | |
| 993 | switch (regclass) |
| 994 | { |
| 995 | case none: |
| 996 | break; |
| 997 | |
| 998 | case pkeys: |
| 999 | if ((clear_bv & X86_XSTATE_PKRU)) |
| 1000 | regcache_raw_supply (regcache, regnum, zero); |
| 1001 | else |
| 1002 | regcache_raw_supply (regcache, regnum, |
| 1003 | XSAVE_PKEYS_ADDR (tdep, regs, regnum)); |
| 1004 | return; |
| 1005 | |
| 1006 | case avx512_zmm_h: |
| 1007 | if ((clear_bv & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM))) |
| 1008 | regcache_raw_supply (regcache, regnum, zero); |
| 1009 | else |
| 1010 | regcache_raw_supply (regcache, regnum, |
| 1011 | XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, regnum)); |
| 1012 | return; |
| 1013 | |
| 1014 | case avx512_k: |
| 1015 | if ((clear_bv & X86_XSTATE_K)) |
| 1016 | regcache_raw_supply (regcache, regnum, zero); |
| 1017 | else |
| 1018 | regcache_raw_supply (regcache, regnum, |
| 1019 | XSAVE_AVX512_K_ADDR (tdep, regs, regnum)); |
| 1020 | return; |
| 1021 | |
| 1022 | case avx512_ymmh_avx512: |
| 1023 | if ((clear_bv & X86_XSTATE_ZMM)) |
| 1024 | regcache_raw_supply (regcache, regnum, zero); |
| 1025 | else |
| 1026 | regcache_raw_supply (regcache, regnum, |
| 1027 | XSAVE_YMM_AVX512_ADDR (tdep, regs, regnum)); |
| 1028 | return; |
| 1029 | |
| 1030 | case avx512_xmm_avx512: |
| 1031 | if ((clear_bv & X86_XSTATE_ZMM)) |
| 1032 | regcache_raw_supply (regcache, regnum, zero); |
| 1033 | else |
| 1034 | regcache_raw_supply (regcache, regnum, |
| 1035 | XSAVE_XMM_AVX512_ADDR (tdep, regs, regnum)); |
| 1036 | return; |
| 1037 | |
| 1038 | case avxh: |
| 1039 | if ((clear_bv & X86_XSTATE_AVX)) |
| 1040 | regcache_raw_supply (regcache, regnum, zero); |
| 1041 | else |
| 1042 | regcache_raw_supply (regcache, regnum, |
| 1043 | XSAVE_AVXH_ADDR (tdep, regs, regnum)); |
| 1044 | return; |
| 1045 | |
| 1046 | case mpx: |
| 1047 | if ((clear_bv & X86_XSTATE_BNDREGS)) |
| 1048 | regcache_raw_supply (regcache, regnum, zero); |
| 1049 | else |
| 1050 | regcache_raw_supply (regcache, regnum, |
| 1051 | XSAVE_MPX_ADDR (tdep, regs, regnum)); |
| 1052 | return; |
| 1053 | |
| 1054 | case sse: |
| 1055 | if ((clear_bv & X86_XSTATE_SSE)) |
| 1056 | regcache_raw_supply (regcache, regnum, zero); |
| 1057 | else |
| 1058 | regcache_raw_supply (regcache, regnum, |
| 1059 | FXSAVE_ADDR (tdep, regs, regnum)); |
| 1060 | return; |
| 1061 | |
| 1062 | case x87: |
| 1063 | if ((clear_bv & X86_XSTATE_X87)) |
| 1064 | regcache_raw_supply (regcache, regnum, zero); |
| 1065 | else |
| 1066 | regcache_raw_supply (regcache, regnum, |
| 1067 | FXSAVE_ADDR (tdep, regs, regnum)); |
| 1068 | return; |
| 1069 | |
| 1070 | case all: |
| 1071 | /* Handle PKEYS registers. */ |
| 1072 | if ((tdep->xcr0 & X86_XSTATE_PKRU)) |
| 1073 | { |
| 1074 | if ((clear_bv & X86_XSTATE_PKRU)) |
| 1075 | { |
| 1076 | for (i = I387_PKRU_REGNUM (tdep); |
| 1077 | i < I387_PKEYSEND_REGNUM (tdep); |
| 1078 | i++) |
| 1079 | regcache_raw_supply (regcache, i, zero); |
| 1080 | } |
| 1081 | else |
| 1082 | { |
| 1083 | for (i = I387_PKRU_REGNUM (tdep); |
| 1084 | i < I387_PKEYSEND_REGNUM (tdep); |
| 1085 | i++) |
| 1086 | regcache_raw_supply (regcache, i, |
| 1087 | XSAVE_PKEYS_ADDR (tdep, regs, i)); |
| 1088 | } |
| 1089 | } |
| 1090 | |
| 1091 | /* Handle the upper ZMM registers. */ |
| 1092 | if ((tdep->xcr0 & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM))) |
| 1093 | { |
| 1094 | if ((clear_bv & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM))) |
| 1095 | { |
| 1096 | for (i = I387_ZMM0H_REGNUM (tdep); |
| 1097 | i < I387_ZMMENDH_REGNUM (tdep); |
| 1098 | i++) |
| 1099 | regcache_raw_supply (regcache, i, zero); |
| 1100 | } |
| 1101 | else |
| 1102 | { |
| 1103 | for (i = I387_ZMM0H_REGNUM (tdep); |
| 1104 | i < I387_ZMMENDH_REGNUM (tdep); |
| 1105 | i++) |
| 1106 | regcache_raw_supply (regcache, i, |
| 1107 | XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i)); |
| 1108 | } |
| 1109 | } |
| 1110 | |
| 1111 | /* Handle AVX512 OpMask registers. */ |
| 1112 | if ((tdep->xcr0 & X86_XSTATE_K)) |
| 1113 | { |
| 1114 | if ((clear_bv & X86_XSTATE_K)) |
| 1115 | { |
| 1116 | for (i = I387_K0_REGNUM (tdep); |
| 1117 | i < I387_KEND_REGNUM (tdep); |
| 1118 | i++) |
| 1119 | regcache_raw_supply (regcache, i, zero); |
| 1120 | } |
| 1121 | else |
| 1122 | { |
| 1123 | for (i = I387_K0_REGNUM (tdep); |
| 1124 | i < I387_KEND_REGNUM (tdep); |
| 1125 | i++) |
| 1126 | regcache_raw_supply (regcache, i, |
| 1127 | XSAVE_AVX512_K_ADDR (tdep, regs, i)); |
| 1128 | } |
| 1129 | } |
| 1130 | |
| 1131 | /* Handle the YMM_AVX512 registers. */ |
| 1132 | if ((tdep->xcr0 & X86_XSTATE_ZMM)) |
| 1133 | { |
| 1134 | if ((clear_bv & X86_XSTATE_ZMM)) |
| 1135 | { |
| 1136 | for (i = I387_YMM16H_REGNUM (tdep); |
| 1137 | i < I387_YMMH_AVX512_END_REGNUM (tdep); |
| 1138 | i++) |
| 1139 | regcache_raw_supply (regcache, i, zero); |
| 1140 | for (i = I387_XMM16_REGNUM (tdep); |
| 1141 | i < I387_XMM_AVX512_END_REGNUM (tdep); |
| 1142 | i++) |
| 1143 | regcache_raw_supply (regcache, i, zero); |
| 1144 | } |
| 1145 | else |
| 1146 | { |
| 1147 | for (i = I387_YMM16H_REGNUM (tdep); |
| 1148 | i < I387_YMMH_AVX512_END_REGNUM (tdep); |
| 1149 | i++) |
| 1150 | regcache_raw_supply (regcache, i, |
| 1151 | XSAVE_YMM_AVX512_ADDR (tdep, regs, i)); |
| 1152 | for (i = I387_XMM16_REGNUM (tdep); |
| 1153 | i < I387_XMM_AVX512_END_REGNUM (tdep); |
| 1154 | i++) |
| 1155 | regcache_raw_supply (regcache, i, |
| 1156 | XSAVE_XMM_AVX512_ADDR (tdep, regs, i)); |
| 1157 | } |
| 1158 | } |
| 1159 | /* Handle the upper YMM registers. */ |
| 1160 | if ((tdep->xcr0 & X86_XSTATE_AVX)) |
| 1161 | { |
| 1162 | if ((clear_bv & X86_XSTATE_AVX)) |
| 1163 | { |
| 1164 | for (i = I387_YMM0H_REGNUM (tdep); |
| 1165 | i < I387_YMMENDH_REGNUM (tdep); |
| 1166 | i++) |
| 1167 | regcache_raw_supply (regcache, i, zero); |
| 1168 | } |
| 1169 | else |
| 1170 | { |
| 1171 | for (i = I387_YMM0H_REGNUM (tdep); |
| 1172 | i < I387_YMMENDH_REGNUM (tdep); |
| 1173 | i++) |
| 1174 | regcache_raw_supply (regcache, i, |
| 1175 | XSAVE_AVXH_ADDR (tdep, regs, i)); |
| 1176 | } |
| 1177 | } |
| 1178 | |
| 1179 | /* Handle the MPX registers. */ |
| 1180 | if ((tdep->xcr0 & X86_XSTATE_BNDREGS)) |
| 1181 | { |
| 1182 | if (clear_bv & X86_XSTATE_BNDREGS) |
| 1183 | { |
| 1184 | for (i = I387_BND0R_REGNUM (tdep); |
| 1185 | i < I387_BNDCFGU_REGNUM (tdep); i++) |
| 1186 | regcache_raw_supply (regcache, i, zero); |
| 1187 | } |
| 1188 | else |
| 1189 | { |
| 1190 | for (i = I387_BND0R_REGNUM (tdep); |
| 1191 | i < I387_BNDCFGU_REGNUM (tdep); i++) |
| 1192 | regcache_raw_supply (regcache, i, |
| 1193 | XSAVE_MPX_ADDR (tdep, regs, i)); |
| 1194 | } |
| 1195 | } |
| 1196 | |
| 1197 | /* Handle the MPX registers. */ |
| 1198 | if ((tdep->xcr0 & X86_XSTATE_BNDCFG)) |
| 1199 | { |
| 1200 | if (clear_bv & X86_XSTATE_BNDCFG) |
| 1201 | { |
| 1202 | for (i = I387_BNDCFGU_REGNUM (tdep); |
| 1203 | i < I387_MPXEND_REGNUM (tdep); i++) |
| 1204 | regcache_raw_supply (regcache, i, zero); |
| 1205 | } |
| 1206 | else |
| 1207 | { |
| 1208 | for (i = I387_BNDCFGU_REGNUM (tdep); |
| 1209 | i < I387_MPXEND_REGNUM (tdep); i++) |
| 1210 | regcache_raw_supply (regcache, i, |
| 1211 | XSAVE_MPX_ADDR (tdep, regs, i)); |
| 1212 | } |
| 1213 | } |
| 1214 | |
| 1215 | /* Handle the XMM registers. */ |
| 1216 | if ((tdep->xcr0 & X86_XSTATE_SSE)) |
| 1217 | { |
| 1218 | if ((clear_bv & X86_XSTATE_SSE)) |
| 1219 | { |
| 1220 | for (i = I387_XMM0_REGNUM (tdep); |
| 1221 | i < I387_MXCSR_REGNUM (tdep); |
| 1222 | i++) |
| 1223 | regcache_raw_supply (regcache, i, zero); |
| 1224 | } |
| 1225 | else |
| 1226 | { |
| 1227 | for (i = I387_XMM0_REGNUM (tdep); |
| 1228 | i < I387_MXCSR_REGNUM (tdep); i++) |
| 1229 | regcache_raw_supply (regcache, i, |
| 1230 | FXSAVE_ADDR (tdep, regs, i)); |
| 1231 | } |
| 1232 | } |
| 1233 | |
| 1234 | /* Handle the x87 registers. */ |
| 1235 | if ((tdep->xcr0 & X86_XSTATE_X87)) |
| 1236 | { |
| 1237 | if ((clear_bv & X86_XSTATE_X87)) |
| 1238 | { |
| 1239 | for (i = I387_ST0_REGNUM (tdep); |
| 1240 | i < I387_FCTRL_REGNUM (tdep); |
| 1241 | i++) |
| 1242 | regcache_raw_supply (regcache, i, zero); |
| 1243 | } |
| 1244 | else |
| 1245 | { |
| 1246 | for (i = I387_ST0_REGNUM (tdep); |
| 1247 | i < I387_FCTRL_REGNUM (tdep); |
| 1248 | i++) |
| 1249 | regcache_raw_supply (regcache, i, FXSAVE_ADDR (tdep, regs, i)); |
| 1250 | } |
| 1251 | } |
| 1252 | break; |
| 1253 | } |
| 1254 | |
| 1255 | /* Only handle x87 control registers. */ |
| 1256 | for (i = I387_FCTRL_REGNUM (tdep); i < I387_XMM0_REGNUM (tdep); i++) |
| 1257 | if (regnum == -1 || regnum == i) |
| 1258 | { |
| 1259 | /* Most of the FPU control registers occupy only 16 bits in |
| 1260 | the xsave extended state. Give those a special treatment. */ |
| 1261 | if (i != I387_FIOFF_REGNUM (tdep) |
| 1262 | && i != I387_FOOFF_REGNUM (tdep)) |
| 1263 | { |
| 1264 | gdb_byte val[4]; |
| 1265 | |
| 1266 | memcpy (val, FXSAVE_ADDR (tdep, regs, i), 2); |
| 1267 | val[2] = val[3] = 0; |
| 1268 | if (i == I387_FOP_REGNUM (tdep)) |
| 1269 | val[1] &= ((1 << 3) - 1); |
| 1270 | else if (i== I387_FTAG_REGNUM (tdep)) |
| 1271 | { |
| 1272 | /* The fxsave area contains a simplified version of |
| 1273 | the tag word. We have to look at the actual 80-bit |
| 1274 | FP data to recreate the traditional i387 tag word. */ |
| 1275 | |
| 1276 | unsigned long ftag = 0; |
| 1277 | int fpreg; |
| 1278 | int top; |
| 1279 | |
| 1280 | top = ((FXSAVE_ADDR (tdep, regs, |
| 1281 | I387_FSTAT_REGNUM (tdep)))[1] >> 3); |
| 1282 | top &= 0x7; |
| 1283 | |
| 1284 | for (fpreg = 7; fpreg >= 0; fpreg--) |
| 1285 | { |
| 1286 | int tag; |
| 1287 | |
| 1288 | if (val[0] & (1 << fpreg)) |
| 1289 | { |
| 1290 | int thisreg = (fpreg + 8 - top) % 8 |
| 1291 | + I387_ST0_REGNUM (tdep); |
| 1292 | tag = i387_tag (FXSAVE_ADDR (tdep, regs, thisreg)); |
| 1293 | } |
| 1294 | else |
| 1295 | tag = 3; /* Empty */ |
| 1296 | |
| 1297 | ftag |= tag << (2 * fpreg); |
| 1298 | } |
| 1299 | val[0] = ftag & 0xff; |
| 1300 | val[1] = (ftag >> 8) & 0xff; |
| 1301 | } |
| 1302 | regcache_raw_supply (regcache, i, val); |
| 1303 | } |
| 1304 | else |
| 1305 | regcache_raw_supply (regcache, i, FXSAVE_ADDR (tdep, regs, i)); |
| 1306 | } |
| 1307 | |
| 1308 | if (regnum == I387_MXCSR_REGNUM (tdep) || regnum == -1) |
| 1309 | regcache_raw_supply (regcache, I387_MXCSR_REGNUM (tdep), |
| 1310 | FXSAVE_MXCSR_ADDR (regs)); |
| 1311 | } |
| 1312 | |
| 1313 | /* Similar to i387_collect_fxsave, but use XSAVE extended state. */ |
| 1314 | |
| 1315 | void |
| 1316 | i387_collect_xsave (const struct regcache *regcache, int regnum, |
| 1317 | void *xsave, int gcore) |
| 1318 | { |
| 1319 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 1320 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1321 | gdb_byte *regs = (gdb_byte *) xsave; |
| 1322 | int i; |
| 1323 | enum |
| 1324 | { |
| 1325 | none = 0x0, |
| 1326 | check = 0x1, |
| 1327 | x87 = 0x2 | check, |
| 1328 | sse = 0x4 | check, |
| 1329 | avxh = 0x8 | check, |
| 1330 | mpx = 0x10 | check, |
| 1331 | avx512_k = 0x20 | check, |
| 1332 | avx512_zmm_h = 0x40 | check, |
| 1333 | avx512_ymmh_avx512 = 0x80 | check, |
| 1334 | avx512_xmm_avx512 = 0x100 | check, |
| 1335 | pkeys = 0x200 | check, |
| 1336 | all = x87 | sse | avxh | mpx | avx512_k | avx512_zmm_h |
| 1337 | | avx512_ymmh_avx512 | avx512_xmm_avx512 | pkeys |
| 1338 | } regclass; |
| 1339 | |
| 1340 | gdb_assert (tdep->st0_regnum >= I386_ST0_REGNUM); |
| 1341 | gdb_assert (tdep->num_xmm_regs > 0); |
| 1342 | |
| 1343 | if (regnum == -1) |
| 1344 | regclass = all; |
| 1345 | else if (regnum >= I387_PKRU_REGNUM (tdep) |
| 1346 | && regnum < I387_PKEYSEND_REGNUM (tdep)) |
| 1347 | regclass = pkeys; |
| 1348 | else if (regnum >= I387_ZMM0H_REGNUM (tdep) |
| 1349 | && regnum < I387_ZMMENDH_REGNUM (tdep)) |
| 1350 | regclass = avx512_zmm_h; |
| 1351 | else if (regnum >= I387_K0_REGNUM (tdep) |
| 1352 | && regnum < I387_KEND_REGNUM (tdep)) |
| 1353 | regclass = avx512_k; |
| 1354 | else if (regnum >= I387_YMM16H_REGNUM (tdep) |
| 1355 | && regnum < I387_YMMH_AVX512_END_REGNUM (tdep)) |
| 1356 | regclass = avx512_ymmh_avx512; |
| 1357 | else if (regnum >= I387_XMM16_REGNUM (tdep) |
| 1358 | && regnum < I387_XMM_AVX512_END_REGNUM (tdep)) |
| 1359 | regclass = avx512_xmm_avx512; |
| 1360 | else if (regnum >= I387_YMM0H_REGNUM (tdep) |
| 1361 | && regnum < I387_YMMENDH_REGNUM (tdep)) |
| 1362 | regclass = avxh; |
| 1363 | else if (regnum >= I387_BND0R_REGNUM (tdep) |
| 1364 | && regnum < I387_MPXEND_REGNUM (tdep)) |
| 1365 | regclass = mpx; |
| 1366 | else if (regnum >= I387_XMM0_REGNUM (tdep) |
| 1367 | && regnum < I387_MXCSR_REGNUM (tdep)) |
| 1368 | regclass = sse; |
| 1369 | else if (regnum >= I387_ST0_REGNUM (tdep) |
| 1370 | && regnum < I387_FCTRL_REGNUM (tdep)) |
| 1371 | regclass = x87; |
| 1372 | else |
| 1373 | regclass = none; |
| 1374 | |
| 1375 | if (gcore) |
| 1376 | { |
| 1377 | /* Clear XSAVE extended state. */ |
| 1378 | memset (regs, 0, X86_XSTATE_SIZE (tdep->xcr0)); |
| 1379 | |
| 1380 | /* Update XCR0 and `xstate_bv' with XCR0 for gcore. */ |
| 1381 | if (tdep->xsave_xcr0_offset != -1) |
| 1382 | memcpy (regs + tdep->xsave_xcr0_offset, &tdep->xcr0, 8); |
| 1383 | memcpy (XSAVE_XSTATE_BV_ADDR (regs), &tdep->xcr0, 8); |
| 1384 | } |
| 1385 | |
| 1386 | if ((regclass & check)) |
| 1387 | { |
| 1388 | gdb_byte raw[I386_MAX_REGISTER_SIZE]; |
| 1389 | ULONGEST initial_xstate_bv, clear_bv, xstate_bv = 0; |
| 1390 | gdb_byte *p; |
| 1391 | enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); |
| 1392 | |
| 1393 | /* The supported bits in `xstat_bv' are 8 bytes. */ |
| 1394 | initial_xstate_bv = extract_unsigned_integer (XSAVE_XSTATE_BV_ADDR (regs), |
| 1395 | 8, byte_order); |
| 1396 | clear_bv = (~(initial_xstate_bv)) & tdep->xcr0; |
| 1397 | |
| 1398 | /* Clear register set if its bit in xstat_bv is zero. */ |
| 1399 | if (clear_bv) |
| 1400 | { |
| 1401 | if ((clear_bv & X86_XSTATE_PKRU)) |
| 1402 | for (i = I387_PKRU_REGNUM (tdep); |
| 1403 | i < I387_PKEYSEND_REGNUM (tdep); i++) |
| 1404 | memset (XSAVE_PKEYS_ADDR (tdep, regs, i), 0, 4); |
| 1405 | |
| 1406 | if ((clear_bv & X86_XSTATE_BNDREGS)) |
| 1407 | for (i = I387_BND0R_REGNUM (tdep); |
| 1408 | i < I387_BNDCFGU_REGNUM (tdep); i++) |
| 1409 | memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 16); |
| 1410 | |
| 1411 | if ((clear_bv & X86_XSTATE_BNDCFG)) |
| 1412 | for (i = I387_BNDCFGU_REGNUM (tdep); |
| 1413 | i < I387_MPXEND_REGNUM (tdep); i++) |
| 1414 | memset (XSAVE_MPX_ADDR (tdep, regs, i), 0, 8); |
| 1415 | |
| 1416 | if ((clear_bv & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM))) |
| 1417 | for (i = I387_ZMM0H_REGNUM (tdep); |
| 1418 | i < I387_ZMMENDH_REGNUM (tdep); i++) |
| 1419 | memset (XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i), 0, 32); |
| 1420 | |
| 1421 | if ((clear_bv & X86_XSTATE_K)) |
| 1422 | for (i = I387_K0_REGNUM (tdep); |
| 1423 | i < I387_KEND_REGNUM (tdep); i++) |
| 1424 | memset (XSAVE_AVX512_K_ADDR (tdep, regs, i), 0, 8); |
| 1425 | |
| 1426 | if ((clear_bv & X86_XSTATE_ZMM)) |
| 1427 | { |
| 1428 | for (i = I387_YMM16H_REGNUM (tdep); |
| 1429 | i < I387_YMMH_AVX512_END_REGNUM (tdep); i++) |
| 1430 | memset (XSAVE_YMM_AVX512_ADDR (tdep, regs, i), 0, 16); |
| 1431 | for (i = I387_XMM16_REGNUM (tdep); |
| 1432 | i < I387_XMM_AVX512_END_REGNUM (tdep); i++) |
| 1433 | memset (XSAVE_XMM_AVX512_ADDR (tdep, regs, i), 0, 16); |
| 1434 | } |
| 1435 | |
| 1436 | if ((clear_bv & X86_XSTATE_AVX)) |
| 1437 | for (i = I387_YMM0H_REGNUM (tdep); |
| 1438 | i < I387_YMMENDH_REGNUM (tdep); i++) |
| 1439 | memset (XSAVE_AVXH_ADDR (tdep, regs, i), 0, 16); |
| 1440 | |
| 1441 | if ((clear_bv & X86_XSTATE_SSE)) |
| 1442 | for (i = I387_XMM0_REGNUM (tdep); |
| 1443 | i < I387_MXCSR_REGNUM (tdep); i++) |
| 1444 | memset (FXSAVE_ADDR (tdep, regs, i), 0, 16); |
| 1445 | |
| 1446 | if ((clear_bv & X86_XSTATE_X87)) |
| 1447 | for (i = I387_ST0_REGNUM (tdep); |
| 1448 | i < I387_FCTRL_REGNUM (tdep); i++) |
| 1449 | memset (FXSAVE_ADDR (tdep, regs, i), 0, 10); |
| 1450 | } |
| 1451 | |
| 1452 | if (regclass == all) |
| 1453 | { |
| 1454 | /* Check if any PKEYS registers are changed. */ |
| 1455 | if ((tdep->xcr0 & X86_XSTATE_PKRU)) |
| 1456 | for (i = I387_PKRU_REGNUM (tdep); |
| 1457 | i < I387_PKEYSEND_REGNUM (tdep); i++) |
| 1458 | { |
| 1459 | regcache_raw_collect (regcache, i, raw); |
| 1460 | p = XSAVE_PKEYS_ADDR (tdep, regs, i); |
| 1461 | if (memcmp (raw, p, 4) != 0) |
| 1462 | { |
| 1463 | xstate_bv |= X86_XSTATE_PKRU; |
| 1464 | memcpy (p, raw, 4); |
| 1465 | } |
| 1466 | } |
| 1467 | |
| 1468 | /* Check if any ZMMH registers are changed. */ |
| 1469 | if ((tdep->xcr0 & (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM))) |
| 1470 | for (i = I387_ZMM0H_REGNUM (tdep); |
| 1471 | i < I387_ZMMENDH_REGNUM (tdep); i++) |
| 1472 | { |
| 1473 | regcache_raw_collect (regcache, i, raw); |
| 1474 | p = XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, i); |
| 1475 | if (memcmp (raw, p, 32) != 0) |
| 1476 | { |
| 1477 | xstate_bv |= (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM); |
| 1478 | memcpy (p, raw, 32); |
| 1479 | } |
| 1480 | } |
| 1481 | |
| 1482 | /* Check if any K registers are changed. */ |
| 1483 | if ((tdep->xcr0 & X86_XSTATE_K)) |
| 1484 | for (i = I387_K0_REGNUM (tdep); |
| 1485 | i < I387_KEND_REGNUM (tdep); i++) |
| 1486 | { |
| 1487 | regcache_raw_collect (regcache, i, raw); |
| 1488 | p = XSAVE_AVX512_K_ADDR (tdep, regs, i); |
| 1489 | if (memcmp (raw, p, 8) != 0) |
| 1490 | { |
| 1491 | xstate_bv |= X86_XSTATE_K; |
| 1492 | memcpy (p, raw, 8); |
| 1493 | } |
| 1494 | } |
| 1495 | |
| 1496 | /* Check if any XMM or upper YMM registers are changed. */ |
| 1497 | if ((tdep->xcr0 & X86_XSTATE_ZMM)) |
| 1498 | { |
| 1499 | for (i = I387_YMM16H_REGNUM (tdep); |
| 1500 | i < I387_YMMH_AVX512_END_REGNUM (tdep); i++) |
| 1501 | { |
| 1502 | regcache_raw_collect (regcache, i, raw); |
| 1503 | p = XSAVE_YMM_AVX512_ADDR (tdep, regs, i); |
| 1504 | if (memcmp (raw, p, 16) != 0) |
| 1505 | { |
| 1506 | xstate_bv |= X86_XSTATE_ZMM; |
| 1507 | memcpy (p, raw, 16); |
| 1508 | } |
| 1509 | } |
| 1510 | for (i = I387_XMM16_REGNUM (tdep); |
| 1511 | i < I387_XMM_AVX512_END_REGNUM (tdep); i++) |
| 1512 | { |
| 1513 | regcache_raw_collect (regcache, i, raw); |
| 1514 | p = XSAVE_XMM_AVX512_ADDR (tdep, regs, i); |
| 1515 | if (memcmp (raw, p, 16) != 0) |
| 1516 | { |
| 1517 | xstate_bv |= X86_XSTATE_ZMM; |
| 1518 | memcpy (p, raw, 16); |
| 1519 | } |
| 1520 | } |
| 1521 | } |
| 1522 | |
| 1523 | /* Check if any upper YMM registers are changed. */ |
| 1524 | if ((tdep->xcr0 & X86_XSTATE_AVX)) |
| 1525 | for (i = I387_YMM0H_REGNUM (tdep); |
| 1526 | i < I387_YMMENDH_REGNUM (tdep); i++) |
| 1527 | { |
| 1528 | regcache_raw_collect (regcache, i, raw); |
| 1529 | p = XSAVE_AVXH_ADDR (tdep, regs, i); |
| 1530 | if (memcmp (raw, p, 16)) |
| 1531 | { |
| 1532 | xstate_bv |= X86_XSTATE_AVX; |
| 1533 | memcpy (p, raw, 16); |
| 1534 | } |
| 1535 | } |
| 1536 | /* Check if any upper MPX registers are changed. */ |
| 1537 | if ((tdep->xcr0 & X86_XSTATE_BNDREGS)) |
| 1538 | for (i = I387_BND0R_REGNUM (tdep); |
| 1539 | i < I387_BNDCFGU_REGNUM (tdep); i++) |
| 1540 | { |
| 1541 | regcache_raw_collect (regcache, i, raw); |
| 1542 | p = XSAVE_MPX_ADDR (tdep, regs, i); |
| 1543 | if (memcmp (raw, p, 16)) |
| 1544 | { |
| 1545 | xstate_bv |= X86_XSTATE_BNDREGS; |
| 1546 | memcpy (p, raw, 16); |
| 1547 | } |
| 1548 | } |
| 1549 | |
| 1550 | /* Check if any upper MPX registers are changed. */ |
| 1551 | if ((tdep->xcr0 & X86_XSTATE_BNDCFG)) |
| 1552 | for (i = I387_BNDCFGU_REGNUM (tdep); |
| 1553 | i < I387_MPXEND_REGNUM (tdep); i++) |
| 1554 | { |
| 1555 | regcache_raw_collect (regcache, i, raw); |
| 1556 | p = XSAVE_MPX_ADDR (tdep, regs, i); |
| 1557 | if (memcmp (raw, p, 8)) |
| 1558 | { |
| 1559 | xstate_bv |= X86_XSTATE_BNDCFG; |
| 1560 | memcpy (p, raw, 8); |
| 1561 | } |
| 1562 | } |
| 1563 | |
| 1564 | /* Check if any SSE registers are changed. */ |
| 1565 | if ((tdep->xcr0 & X86_XSTATE_SSE)) |
| 1566 | for (i = I387_XMM0_REGNUM (tdep); |
| 1567 | i < I387_MXCSR_REGNUM (tdep); i++) |
| 1568 | { |
| 1569 | regcache_raw_collect (regcache, i, raw); |
| 1570 | p = FXSAVE_ADDR (tdep, regs, i); |
| 1571 | if (memcmp (raw, p, 16)) |
| 1572 | { |
| 1573 | xstate_bv |= X86_XSTATE_SSE; |
| 1574 | memcpy (p, raw, 16); |
| 1575 | } |
| 1576 | } |
| 1577 | |
| 1578 | /* Check if any X87 registers are changed. */ |
| 1579 | if ((tdep->xcr0 & X86_XSTATE_X87)) |
| 1580 | for (i = I387_ST0_REGNUM (tdep); |
| 1581 | i < I387_FCTRL_REGNUM (tdep); i++) |
| 1582 | { |
| 1583 | regcache_raw_collect (regcache, i, raw); |
| 1584 | p = FXSAVE_ADDR (tdep, regs, i); |
| 1585 | if (memcmp (raw, p, 10)) |
| 1586 | { |
| 1587 | xstate_bv |= X86_XSTATE_X87; |
| 1588 | memcpy (p, raw, 10); |
| 1589 | } |
| 1590 | } |
| 1591 | } |
| 1592 | else |
| 1593 | { |
| 1594 | /* Check if REGNUM is changed. */ |
| 1595 | regcache_raw_collect (regcache, regnum, raw); |
| 1596 | |
| 1597 | switch (regclass) |
| 1598 | { |
| 1599 | default: |
| 1600 | internal_error (__FILE__, __LINE__, |
| 1601 | _("invalid i387 regclass")); |
| 1602 | |
| 1603 | case pkeys: |
| 1604 | /* This is a PKEYS register. */ |
| 1605 | p = XSAVE_PKEYS_ADDR (tdep, regs, regnum); |
| 1606 | if (memcmp (raw, p, 4) != 0) |
| 1607 | { |
| 1608 | xstate_bv |= X86_XSTATE_PKRU; |
| 1609 | memcpy (p, raw, 4); |
| 1610 | } |
| 1611 | break; |
| 1612 | |
| 1613 | case avx512_zmm_h: |
| 1614 | /* This is a ZMM register. */ |
| 1615 | p = XSAVE_AVX512_ZMM_H_ADDR (tdep, regs, regnum); |
| 1616 | if (memcmp (raw, p, 32) != 0) |
| 1617 | { |
| 1618 | xstate_bv |= (X86_XSTATE_ZMM_H | X86_XSTATE_ZMM); |
| 1619 | memcpy (p, raw, 32); |
| 1620 | } |
| 1621 | break; |
| 1622 | case avx512_k: |
| 1623 | /* This is a AVX512 mask register. */ |
| 1624 | p = XSAVE_AVX512_K_ADDR (tdep, regs, regnum); |
| 1625 | if (memcmp (raw, p, 8) != 0) |
| 1626 | { |
| 1627 | xstate_bv |= X86_XSTATE_K; |
| 1628 | memcpy (p, raw, 8); |
| 1629 | } |
| 1630 | break; |
| 1631 | |
| 1632 | case avx512_ymmh_avx512: |
| 1633 | /* This is an upper YMM16-31 register. */ |
| 1634 | p = XSAVE_YMM_AVX512_ADDR (tdep, regs, regnum); |
| 1635 | if (memcmp (raw, p, 16) != 0) |
| 1636 | { |
| 1637 | xstate_bv |= X86_XSTATE_ZMM; |
| 1638 | memcpy (p, raw, 16); |
| 1639 | } |
| 1640 | break; |
| 1641 | |
| 1642 | case avx512_xmm_avx512: |
| 1643 | /* This is an upper XMM16-31 register. */ |
| 1644 | p = XSAVE_XMM_AVX512_ADDR (tdep, regs, regnum); |
| 1645 | if (memcmp (raw, p, 16) != 0) |
| 1646 | { |
| 1647 | xstate_bv |= X86_XSTATE_ZMM; |
| 1648 | memcpy (p, raw, 16); |
| 1649 | } |
| 1650 | break; |
| 1651 | |
| 1652 | case avxh: |
| 1653 | /* This is an upper YMM register. */ |
| 1654 | p = XSAVE_AVXH_ADDR (tdep, regs, regnum); |
| 1655 | if (memcmp (raw, p, 16)) |
| 1656 | { |
| 1657 | xstate_bv |= X86_XSTATE_AVX; |
| 1658 | memcpy (p, raw, 16); |
| 1659 | } |
| 1660 | break; |
| 1661 | |
| 1662 | case mpx: |
| 1663 | if (regnum < I387_BNDCFGU_REGNUM (tdep)) |
| 1664 | { |
| 1665 | regcache_raw_collect (regcache, regnum, raw); |
| 1666 | p = XSAVE_MPX_ADDR (tdep, regs, regnum); |
| 1667 | if (memcmp (raw, p, 16)) |
| 1668 | { |
| 1669 | xstate_bv |= X86_XSTATE_BNDREGS; |
| 1670 | memcpy (p, raw, 16); |
| 1671 | } |
| 1672 | } |
| 1673 | else |
| 1674 | { |
| 1675 | p = XSAVE_MPX_ADDR (tdep, regs, regnum); |
| 1676 | xstate_bv |= X86_XSTATE_BNDCFG; |
| 1677 | memcpy (p, raw, 8); |
| 1678 | } |
| 1679 | break; |
| 1680 | |
| 1681 | case sse: |
| 1682 | /* This is an SSE register. */ |
| 1683 | p = FXSAVE_ADDR (tdep, regs, regnum); |
| 1684 | if (memcmp (raw, p, 16)) |
| 1685 | { |
| 1686 | xstate_bv |= X86_XSTATE_SSE; |
| 1687 | memcpy (p, raw, 16); |
| 1688 | } |
| 1689 | break; |
| 1690 | |
| 1691 | case x87: |
| 1692 | /* This is an x87 register. */ |
| 1693 | p = FXSAVE_ADDR (tdep, regs, regnum); |
| 1694 | if (memcmp (raw, p, 10)) |
| 1695 | { |
| 1696 | xstate_bv |= X86_XSTATE_X87; |
| 1697 | memcpy (p, raw, 10); |
| 1698 | } |
| 1699 | break; |
| 1700 | } |
| 1701 | } |
| 1702 | |
| 1703 | /* Update the corresponding bits in `xstate_bv' if any SSE/AVX |
| 1704 | registers are changed. */ |
| 1705 | if (xstate_bv) |
| 1706 | { |
| 1707 | /* The supported bits in `xstat_bv' are 8 bytes. */ |
| 1708 | initial_xstate_bv |= xstate_bv; |
| 1709 | store_unsigned_integer (XSAVE_XSTATE_BV_ADDR (regs), |
| 1710 | 8, byte_order, |
| 1711 | initial_xstate_bv); |
| 1712 | |
| 1713 | switch (regclass) |
| 1714 | { |
| 1715 | default: |
| 1716 | internal_error (__FILE__, __LINE__, |
| 1717 | _("invalid i387 regclass")); |
| 1718 | |
| 1719 | case all: |
| 1720 | break; |
| 1721 | |
| 1722 | case x87: |
| 1723 | case sse: |
| 1724 | case avxh: |
| 1725 | case mpx: |
| 1726 | case avx512_k: |
| 1727 | case avx512_zmm_h: |
| 1728 | case avx512_ymmh_avx512: |
| 1729 | case avx512_xmm_avx512: |
| 1730 | case pkeys: |
| 1731 | /* Register REGNUM has been updated. Return. */ |
| 1732 | return; |
| 1733 | } |
| 1734 | } |
| 1735 | else |
| 1736 | { |
| 1737 | /* Return if REGNUM isn't changed. */ |
| 1738 | if (regclass != all) |
| 1739 | return; |
| 1740 | } |
| 1741 | } |
| 1742 | |
| 1743 | /* Only handle x87 control registers. */ |
| 1744 | for (i = I387_FCTRL_REGNUM (tdep); i < I387_XMM0_REGNUM (tdep); i++) |
| 1745 | if (regnum == -1 || regnum == i) |
| 1746 | { |
| 1747 | /* Most of the FPU control registers occupy only 16 bits in |
| 1748 | the xsave extended state. Give those a special treatment. */ |
| 1749 | if (i != I387_FIOFF_REGNUM (tdep) |
| 1750 | && i != I387_FOOFF_REGNUM (tdep)) |
| 1751 | { |
| 1752 | gdb_byte buf[4]; |
| 1753 | |
| 1754 | regcache_raw_collect (regcache, i, buf); |
| 1755 | |
| 1756 | if (i == I387_FOP_REGNUM (tdep)) |
| 1757 | { |
| 1758 | /* The opcode occupies only 11 bits. Make sure we |
| 1759 | don't touch the other bits. */ |
| 1760 | buf[1] &= ((1 << 3) - 1); |
| 1761 | buf[1] |= ((FXSAVE_ADDR (tdep, regs, i))[1] & ~((1 << 3) - 1)); |
| 1762 | } |
| 1763 | else if (i == I387_FTAG_REGNUM (tdep)) |
| 1764 | { |
| 1765 | /* Converting back is much easier. */ |
| 1766 | |
| 1767 | unsigned short ftag; |
| 1768 | int fpreg; |
| 1769 | |
| 1770 | ftag = (buf[1] << 8) | buf[0]; |
| 1771 | buf[0] = 0; |
| 1772 | buf[1] = 0; |
| 1773 | |
| 1774 | for (fpreg = 7; fpreg >= 0; fpreg--) |
| 1775 | { |
| 1776 | int tag = (ftag >> (fpreg * 2)) & 3; |
| 1777 | |
| 1778 | if (tag != 3) |
| 1779 | buf[0] |= (1 << fpreg); |
| 1780 | } |
| 1781 | } |
| 1782 | memcpy (FXSAVE_ADDR (tdep, regs, i), buf, 2); |
| 1783 | } |
| 1784 | else |
| 1785 | regcache_raw_collect (regcache, i, FXSAVE_ADDR (tdep, regs, i)); |
| 1786 | } |
| 1787 | |
| 1788 | if (regnum == I387_MXCSR_REGNUM (tdep) || regnum == -1) |
| 1789 | regcache_raw_collect (regcache, I387_MXCSR_REGNUM (tdep), |
| 1790 | FXSAVE_MXCSR_ADDR (regs)); |
| 1791 | } |
| 1792 | |
| 1793 | /* Recreate the FTW (tag word) valid bits from the 80-bit FP data in |
| 1794 | *RAW. */ |
| 1795 | |
| 1796 | static int |
| 1797 | i387_tag (const gdb_byte *raw) |
| 1798 | { |
| 1799 | int integer; |
| 1800 | unsigned int exponent; |
| 1801 | unsigned long fraction[2]; |
| 1802 | |
| 1803 | integer = raw[7] & 0x80; |
| 1804 | exponent = (((raw[9] & 0x7f) << 8) | raw[8]); |
| 1805 | fraction[0] = ((raw[3] << 24) | (raw[2] << 16) | (raw[1] << 8) | raw[0]); |
| 1806 | fraction[1] = (((raw[7] & 0x7f) << 24) | (raw[6] << 16) |
| 1807 | | (raw[5] << 8) | raw[4]); |
| 1808 | |
| 1809 | if (exponent == 0x7fff) |
| 1810 | { |
| 1811 | /* Special. */ |
| 1812 | return (2); |
| 1813 | } |
| 1814 | else if (exponent == 0x0000) |
| 1815 | { |
| 1816 | if (fraction[0] == 0x0000 && fraction[1] == 0x0000 && !integer) |
| 1817 | { |
| 1818 | /* Zero. */ |
| 1819 | return (1); |
| 1820 | } |
| 1821 | else |
| 1822 | { |
| 1823 | /* Special. */ |
| 1824 | return (2); |
| 1825 | } |
| 1826 | } |
| 1827 | else |
| 1828 | { |
| 1829 | if (integer) |
| 1830 | { |
| 1831 | /* Valid. */ |
| 1832 | return (0); |
| 1833 | } |
| 1834 | else |
| 1835 | { |
| 1836 | /* Special. */ |
| 1837 | return (2); |
| 1838 | } |
| 1839 | } |
| 1840 | } |
| 1841 | |
| 1842 | /* Prepare the FPU stack in REGCACHE for a function return. */ |
| 1843 | |
| 1844 | void |
| 1845 | i387_return_value (struct gdbarch *gdbarch, struct regcache *regcache) |
| 1846 | { |
| 1847 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1848 | ULONGEST fstat; |
| 1849 | |
| 1850 | /* Set the top of the floating-point register stack to 7. The |
| 1851 | actual value doesn't really matter, but 7 is what a normal |
| 1852 | function return would end up with if the program started out with |
| 1853 | a freshly initialized FPU. */ |
| 1854 | regcache_raw_read_unsigned (regcache, I387_FSTAT_REGNUM (tdep), &fstat); |
| 1855 | fstat |= (7 << 11); |
| 1856 | regcache_raw_write_unsigned (regcache, I387_FSTAT_REGNUM (tdep), fstat); |
| 1857 | |
| 1858 | /* Mark %st(1) through %st(7) as empty. Since we set the top of the |
| 1859 | floating-point register stack to 7, the appropriate value for the |
| 1860 | tag word is 0x3fff. */ |
| 1861 | regcache_raw_write_unsigned (regcache, I387_FTAG_REGNUM (tdep), 0x3fff); |
| 1862 | |
| 1863 | } |
| 1864 | |
| 1865 | /* See i387-tdep.h. */ |
| 1866 | |
| 1867 | void |
| 1868 | i387_reset_bnd_regs (struct gdbarch *gdbarch, struct regcache *regcache) |
| 1869 | { |
| 1870 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| 1871 | |
| 1872 | if (I387_BND0R_REGNUM (tdep) > 0) |
| 1873 | { |
| 1874 | gdb_byte bnd_buf[16]; |
| 1875 | |
| 1876 | memset (bnd_buf, 0, 16); |
| 1877 | for (int i = 0; i < I387_NUM_BND_REGS; i++) |
| 1878 | regcache_raw_write (regcache, I387_BND0R_REGNUM (tdep) + i, bnd_buf); |
| 1879 | } |
| 1880 | } |