| 1 | /* Target-dependent code for the S12Z, for the GDB. |
| 2 | Copyright (C) 2018-2019 Free Software Foundation, Inc. |
| 3 | |
| 4 | This file is part of GDB. |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 3 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | /* Much of this file is shamelessly copied from or1k-tdep.c and others. */ |
| 20 | |
| 21 | #include "defs.h" |
| 22 | |
| 23 | #include "arch-utils.h" |
| 24 | #include "dwarf2-frame.h" |
| 25 | #include "common/errors.h" |
| 26 | #include "frame-unwind.h" |
| 27 | #include "gdbcore.h" |
| 28 | #include "gdbcmd.h" |
| 29 | #include "inferior.h" |
| 30 | #include "opcode/s12z.h" |
| 31 | #include "trad-frame.h" |
| 32 | #include "remote.h" |
| 33 | |
| 34 | /* Two of the registers included in S12Z_N_REGISTERS are |
| 35 | the CCH and CCL "registers" which are just views into |
| 36 | the CCW register. */ |
| 37 | #define N_PHYSICAL_REGISTERS (S12Z_N_REGISTERS - 2) |
| 38 | |
| 39 | |
| 40 | /* A permutation of all the physical registers. Indexing this array |
| 41 | with an integer from gdb's internal representation will return the |
| 42 | register enum. */ |
| 43 | static const int reg_perm[N_PHYSICAL_REGISTERS] = |
| 44 | { |
| 45 | REG_D0, |
| 46 | REG_D1, |
| 47 | REG_D2, |
| 48 | REG_D3, |
| 49 | REG_D4, |
| 50 | REG_D5, |
| 51 | REG_D6, |
| 52 | REG_D7, |
| 53 | REG_X, |
| 54 | REG_Y, |
| 55 | REG_S, |
| 56 | REG_P, |
| 57 | REG_CCW |
| 58 | }; |
| 59 | |
| 60 | /* The inverse of the above permutation. Indexing this |
| 61 | array with a register enum (e.g. REG_D2) will return the register |
| 62 | number in gdb's internal representation. */ |
| 63 | static const int inv_reg_perm[N_PHYSICAL_REGISTERS] = |
| 64 | { |
| 65 | 2, 3, 4, 5, /* d2, d3, d4, d5 */ |
| 66 | 0, 1, /* d0, d1 */ |
| 67 | 6, 7, /* d6, d7 */ |
| 68 | 8, 9, 10, 11, 12 /* x, y, s, p, ccw */ |
| 69 | }; |
| 70 | |
| 71 | /* Return the name of the register REGNUM. */ |
| 72 | static const char * |
| 73 | s12z_register_name (struct gdbarch *gdbarch, int regnum) |
| 74 | { |
| 75 | /* Registers is declared in opcodes/s12z.h. */ |
| 76 | return registers[reg_perm[regnum]].name; |
| 77 | } |
| 78 | |
| 79 | static CORE_ADDR |
| 80 | s12z_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR pc) |
| 81 | { |
| 82 | CORE_ADDR start_pc = 0; |
| 83 | |
| 84 | if (find_pc_partial_function (pc, NULL, &start_pc, NULL)) |
| 85 | { |
| 86 | CORE_ADDR prologue_end = skip_prologue_using_sal (gdbarch, pc); |
| 87 | |
| 88 | if (prologue_end != 0) |
| 89 | return prologue_end; |
| 90 | } |
| 91 | |
| 92 | warning (_("%s Failed to find end of prologue PC = %08x\n"), |
| 93 | __FUNCTION__, (unsigned int) pc); |
| 94 | |
| 95 | return pc; |
| 96 | } |
| 97 | |
| 98 | /* Implement the unwind_pc gdbarch method. */ |
| 99 | static CORE_ADDR |
| 100 | s12z_unwind_pc (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 101 | { |
| 102 | return frame_unwind_register_unsigned (next_frame, REG_P); |
| 103 | } |
| 104 | |
| 105 | /* Implement the unwind_sp gdbarch method. */ |
| 106 | static CORE_ADDR |
| 107 | s12z_unwind_sp (struct gdbarch *gdbarch, struct frame_info *next_frame) |
| 108 | { |
| 109 | return frame_unwind_register_unsigned (next_frame, REG_S); |
| 110 | } |
| 111 | |
| 112 | static struct type * |
| 113 | s12z_register_type (struct gdbarch *gdbarch, int reg_nr) |
| 114 | { |
| 115 | switch (registers[reg_perm[reg_nr]].bytes) |
| 116 | { |
| 117 | case 1: |
| 118 | return builtin_type (gdbarch)->builtin_uint8; |
| 119 | case 2: |
| 120 | return builtin_type (gdbarch)->builtin_uint16; |
| 121 | case 3: |
| 122 | return builtin_type (gdbarch)->builtin_uint24; |
| 123 | case 4: |
| 124 | return builtin_type (gdbarch)->builtin_uint32; |
| 125 | default: |
| 126 | return builtin_type (gdbarch)->builtin_uint32; |
| 127 | } |
| 128 | return builtin_type (gdbarch)->builtin_int0; |
| 129 | } |
| 130 | |
| 131 | |
| 132 | static int |
| 133 | s12z_dwarf_reg_to_regnum (struct gdbarch *gdbarch, int num) |
| 134 | { |
| 135 | switch (num) |
| 136 | { |
| 137 | case 15: return REG_S; |
| 138 | case 7: return REG_X; |
| 139 | case 8: return REG_Y; |
| 140 | case 42: return REG_D0; |
| 141 | case 43: return REG_D1; |
| 142 | case 44: return REG_D2; |
| 143 | case 45: return REG_D3; |
| 144 | case 46: return REG_D4; |
| 145 | case 47: return REG_D5; |
| 146 | case 48: return REG_D6; |
| 147 | case 49: return REG_D7; |
| 148 | } |
| 149 | return -1; |
| 150 | } |
| 151 | |
| 152 | |
| 153 | /* Support functions for frame handling. */ |
| 154 | |
| 155 | /* Copy of gdb_buffered_insn_length_fprintf from disasm.c. */ |
| 156 | |
| 157 | static int ATTRIBUTE_PRINTF (2, 3) |
| 158 | s12z_fprintf_disasm (void *stream, const char *format, ...) |
| 159 | { |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | struct disassemble_info |
| 164 | s12z_disassemble_info (struct gdbarch *gdbarch) |
| 165 | { |
| 166 | struct disassemble_info di; |
| 167 | init_disassemble_info (&di, &null_stream, s12z_fprintf_disasm); |
| 168 | di.arch = gdbarch_bfd_arch_info (gdbarch)->arch; |
| 169 | di.mach = gdbarch_bfd_arch_info (gdbarch)->mach; |
| 170 | di.endian = gdbarch_byte_order (gdbarch); |
| 171 | di.read_memory_func = [](bfd_vma memaddr, gdb_byte *myaddr, |
| 172 | unsigned int len, struct disassemble_info *info) |
| 173 | { |
| 174 | return target_read_code (memaddr, myaddr, len); |
| 175 | }; |
| 176 | return di; |
| 177 | } |
| 178 | |
| 179 | /* Initialize a prologue cache. */ |
| 180 | |
| 181 | static struct trad_frame_cache * |
| 182 | s12z_frame_cache (struct frame_info *this_frame, void **prologue_cache) |
| 183 | { |
| 184 | struct trad_frame_cache *info; |
| 185 | |
| 186 | CORE_ADDR this_sp; |
| 187 | CORE_ADDR this_sp_for_id; |
| 188 | |
| 189 | CORE_ADDR start_addr; |
| 190 | CORE_ADDR end_addr; |
| 191 | |
| 192 | /* Nothing to do if we already have this info. */ |
| 193 | if (NULL != *prologue_cache) |
| 194 | return (struct trad_frame_cache *) *prologue_cache; |
| 195 | |
| 196 | /* Get a new prologue cache and populate it with default values. */ |
| 197 | info = trad_frame_cache_zalloc (this_frame); |
| 198 | *prologue_cache = info; |
| 199 | |
| 200 | /* Find the start address of this function (which is a normal frame, even |
| 201 | if the next frame is the sentinel frame) and the end of its prologue. */ |
| 202 | CORE_ADDR this_pc = get_frame_pc (this_frame); |
| 203 | struct gdbarch *gdbarch = get_frame_arch (this_frame); |
| 204 | find_pc_partial_function (this_pc, NULL, &start_addr, NULL); |
| 205 | |
| 206 | /* Get the stack pointer if we have one (if there's no process executing |
| 207 | yet we won't have a frame. */ |
| 208 | this_sp = (NULL == this_frame) ? 0 : |
| 209 | get_frame_register_unsigned (this_frame, REG_S); |
| 210 | |
| 211 | /* Return early if GDB couldn't find the function. */ |
| 212 | if (start_addr == 0) |
| 213 | { |
| 214 | warning (_("Couldn't find function including address %s SP is %s\n"), |
| 215 | paddress (gdbarch, this_pc), |
| 216 | paddress (gdbarch, this_sp)); |
| 217 | |
| 218 | /* JPB: 28-Apr-11. This is a temporary patch, to get round GDB |
| 219 | crashing right at the beginning. Build the frame ID as best we |
| 220 | can. */ |
| 221 | trad_frame_set_id (info, frame_id_build (this_sp, this_pc)); |
| 222 | |
| 223 | return info; |
| 224 | } |
| 225 | |
| 226 | /* The default frame base of this frame (for ID purposes only - frame |
| 227 | base is an overloaded term) is its stack pointer. For now we use the |
| 228 | value of the SP register in this frame. However if the PC is in the |
| 229 | prologue of this frame, before the SP has been set up, then the value |
| 230 | will actually be that of the prev frame, and we'll need to adjust it |
| 231 | later. */ |
| 232 | trad_frame_set_this_base (info, this_sp); |
| 233 | this_sp_for_id = this_sp; |
| 234 | |
| 235 | /* We should only examine code that is in the prologue. This is all code |
| 236 | up to (but not including) end_addr. We should only populate the cache |
| 237 | while the address is up to (but not including) the PC or end_addr, |
| 238 | whichever is first. */ |
| 239 | end_addr = s12z_skip_prologue (gdbarch, start_addr); |
| 240 | |
| 241 | /* All the following analysis only occurs if we are in the prologue and |
| 242 | have executed the code. Check we have a sane prologue size, and if |
| 243 | zero we are frameless and can give up here. */ |
| 244 | if (end_addr < start_addr) |
| 245 | error (_("end addr %s is less than start addr %s"), |
| 246 | paddress (gdbarch, end_addr), paddress (gdbarch, start_addr)); |
| 247 | |
| 248 | CORE_ADDR addr = start_addr; /* Where we have got to? */ |
| 249 | int frame_size = 0; |
| 250 | int saved_frame_size = 0; |
| 251 | while (this_pc > addr) |
| 252 | { |
| 253 | struct disassemble_info di = s12z_disassemble_info (gdbarch); |
| 254 | |
| 255 | /* No instruction can be more than 11 bytes long, I think. */ |
| 256 | gdb_byte buf[11]; |
| 257 | |
| 258 | int nb = print_insn_s12z (addr, &di); |
| 259 | gdb_assert (nb <= 11); |
| 260 | |
| 261 | if (0 != target_read_code (addr, buf, nb)) |
| 262 | memory_error (TARGET_XFER_E_IO, addr); |
| 263 | |
| 264 | if (buf[0] == 0x05) /* RTS */ |
| 265 | { |
| 266 | frame_size = saved_frame_size; |
| 267 | } |
| 268 | /* Conditional Branches. If any of these are encountered, then |
| 269 | it is likely that a RTS will terminate it. So we need to save |
| 270 | the frame size so it can be restored. */ |
| 271 | else if ( (buf[0] == 0x02) /* BRSET */ |
| 272 | || (buf[0] == 0x0B) /* DBcc / TBcc */ |
| 273 | || (buf[0] == 0x03)) /* BRCLR */ |
| 274 | { |
| 275 | saved_frame_size = frame_size; |
| 276 | } |
| 277 | else if (buf[0] == 0x04) /* PUL/ PSH .. */ |
| 278 | { |
| 279 | bool pull = buf[1] & 0x80; |
| 280 | int stack_adjustment = 0; |
| 281 | if (buf[1] & 0x40) |
| 282 | { |
| 283 | if (buf[1] & 0x01) stack_adjustment += 3; /* Y */ |
| 284 | if (buf[1] & 0x02) stack_adjustment += 3; /* X */ |
| 285 | if (buf[1] & 0x04) stack_adjustment += 4; /* D7 */ |
| 286 | if (buf[1] & 0x08) stack_adjustment += 4; /* D6 */ |
| 287 | if (buf[1] & 0x10) stack_adjustment += 2; /* D5 */ |
| 288 | if (buf[1] & 0x20) stack_adjustment += 2; /* D4 */ |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | if (buf[1] & 0x01) stack_adjustment += 2; /* D3 */ |
| 293 | if (buf[1] & 0x02) stack_adjustment += 2; /* D2 */ |
| 294 | if (buf[1] & 0x04) stack_adjustment += 1; /* D1 */ |
| 295 | if (buf[1] & 0x08) stack_adjustment += 1; /* D0 */ |
| 296 | if (buf[1] & 0x10) stack_adjustment += 1; /* CCL */ |
| 297 | if (buf[1] & 0x20) stack_adjustment += 1; /* CCH */ |
| 298 | } |
| 299 | |
| 300 | if (!pull) |
| 301 | stack_adjustment = -stack_adjustment; |
| 302 | frame_size -= stack_adjustment; |
| 303 | } |
| 304 | else if (buf[0] == 0x0a) /* LEA S, (xxx, S) */ |
| 305 | { |
| 306 | if (0x06 == (buf[1] >> 4)) |
| 307 | { |
| 308 | int simm = (signed char) (buf[1] & 0x0F); |
| 309 | frame_size -= simm; |
| 310 | } |
| 311 | } |
| 312 | else if (buf[0] == 0x1a) /* LEA S, (S, xxxx) */ |
| 313 | { |
| 314 | int simm = (signed char) buf[1]; |
| 315 | frame_size -= simm; |
| 316 | } |
| 317 | addr += nb; |
| 318 | } |
| 319 | |
| 320 | /* If the PC has not actually got to this point, then the frame |
| 321 | base will be wrong, and we adjust it. */ |
| 322 | if (this_pc < addr) |
| 323 | { |
| 324 | /* Only do if executing. */ |
| 325 | if (0 != this_sp) |
| 326 | { |
| 327 | this_sp_for_id = this_sp - frame_size; |
| 328 | trad_frame_set_this_base (info, this_sp_for_id); |
| 329 | } |
| 330 | trad_frame_set_reg_value (info, REG_S, this_sp + 3); |
| 331 | trad_frame_set_reg_addr (info, REG_P, this_sp); |
| 332 | } |
| 333 | else |
| 334 | { |
| 335 | gdb_assert (this_sp == this_sp_for_id); |
| 336 | /* The stack pointer of the prev frame is frame_size greater |
| 337 | than the stack pointer of this frame plus one address |
| 338 | size (caused by the JSR or BSR). */ |
| 339 | trad_frame_set_reg_value (info, REG_S, |
| 340 | this_sp + frame_size + 3); |
| 341 | trad_frame_set_reg_addr (info, REG_P, this_sp + frame_size); |
| 342 | } |
| 343 | |
| 344 | |
| 345 | /* Build the frame ID. */ |
| 346 | trad_frame_set_id (info, frame_id_build (this_sp_for_id, start_addr)); |
| 347 | |
| 348 | return info; |
| 349 | } |
| 350 | |
| 351 | /* Implement the this_id function for the stub unwinder. */ |
| 352 | static void |
| 353 | s12z_frame_this_id (struct frame_info *this_frame, |
| 354 | void **prologue_cache, struct frame_id *this_id) |
| 355 | { |
| 356 | struct trad_frame_cache *info = s12z_frame_cache (this_frame, |
| 357 | prologue_cache); |
| 358 | |
| 359 | trad_frame_get_id (info, this_id); |
| 360 | } |
| 361 | |
| 362 | |
| 363 | /* Implement the prev_register function for the stub unwinder. */ |
| 364 | static struct value * |
| 365 | s12z_frame_prev_register (struct frame_info *this_frame, |
| 366 | void **prologue_cache, int regnum) |
| 367 | { |
| 368 | struct trad_frame_cache *info = s12z_frame_cache (this_frame, |
| 369 | prologue_cache); |
| 370 | |
| 371 | return trad_frame_get_register (info, this_frame, regnum); |
| 372 | } |
| 373 | |
| 374 | /* Data structures for the normal prologue-analysis-based unwinder. */ |
| 375 | static const struct frame_unwind s12z_frame_unwind = { |
| 376 | NORMAL_FRAME, |
| 377 | default_frame_unwind_stop_reason, |
| 378 | s12z_frame_this_id, |
| 379 | s12z_frame_prev_register, |
| 380 | NULL, |
| 381 | default_frame_sniffer, |
| 382 | NULL, |
| 383 | }; |
| 384 | |
| 385 | |
| 386 | constexpr gdb_byte s12z_break_insn[] = {0x00}; |
| 387 | |
| 388 | typedef BP_MANIPULATION (s12z_break_insn) s12z_breakpoint; |
| 389 | |
| 390 | struct gdbarch_tdep |
| 391 | { |
| 392 | }; |
| 393 | |
| 394 | /* A vector of human readable characters representing the |
| 395 | bits in the CCW register. Unused bits are represented as '-'. |
| 396 | Lowest significant bit comes first. */ |
| 397 | static const char ccw_bits[] = |
| 398 | { |
| 399 | 'C', /* Carry */ |
| 400 | 'V', /* Two's Complement Overflow */ |
| 401 | 'Z', /* Zero */ |
| 402 | 'N', /* Negative */ |
| 403 | 'I', /* Interrupt */ |
| 404 | '-', |
| 405 | 'X', /* Non-Maskable Interrupt */ |
| 406 | 'S', /* STOP Disable */ |
| 407 | '0', /* Interrupt priority level */ |
| 408 | '0', /* ditto */ |
| 409 | '0', /* ditto */ |
| 410 | '-', |
| 411 | '-', |
| 412 | '-', |
| 413 | '-', |
| 414 | 'U' /* User/Supervisor State. */ |
| 415 | }; |
| 416 | |
| 417 | /* Print a human readable representation of the CCW register. |
| 418 | For example: "u----000SX-Inzvc" corresponds to the value |
| 419 | 0xD0. */ |
| 420 | static void |
| 421 | s12z_print_ccw_info (struct gdbarch *gdbarch, |
| 422 | struct ui_file *file, |
| 423 | struct frame_info *frame, |
| 424 | int reg) |
| 425 | { |
| 426 | struct value *v = value_of_register (reg, frame); |
| 427 | const char *name = gdbarch_register_name (gdbarch, reg); |
| 428 | uint32_t ccw = value_as_long (v); |
| 429 | fputs_filtered (name, file); |
| 430 | size_t len = strlen (name); |
| 431 | const int stop_1 = 15; |
| 432 | const int stop_2 = 17; |
| 433 | for (int i = 0; i < stop_1 - len; ++i) |
| 434 | fputc_filtered (' ', file); |
| 435 | fprintf_filtered (file, "0x%04x", ccw); |
| 436 | for (int i = 0; i < stop_2 - len; ++i) |
| 437 | fputc_filtered (' ', file); |
| 438 | for (int b = 15; b >= 0; --b) |
| 439 | { |
| 440 | if (ccw & (0x1u << b)) |
| 441 | { |
| 442 | if (ccw_bits[b] == 0) |
| 443 | fputc_filtered ('1', file); |
| 444 | else |
| 445 | fputc_filtered (ccw_bits[b], file); |
| 446 | } |
| 447 | else |
| 448 | fputc_filtered (tolower (ccw_bits[b]), file); |
| 449 | } |
| 450 | fputc_filtered ('\n', file); |
| 451 | } |
| 452 | |
| 453 | static void |
| 454 | s12z_print_registers_info (struct gdbarch *gdbarch, |
| 455 | struct ui_file *file, |
| 456 | struct frame_info *frame, |
| 457 | int regnum, int print_all) |
| 458 | { |
| 459 | const int numregs = (gdbarch_num_regs (gdbarch) |
| 460 | + gdbarch_num_pseudo_regs (gdbarch)); |
| 461 | |
| 462 | if (regnum == -1) |
| 463 | { |
| 464 | for (int reg = 0; reg < numregs; reg++) |
| 465 | { |
| 466 | if (REG_CCW == reg_perm[reg]) |
| 467 | { |
| 468 | s12z_print_ccw_info (gdbarch, file, frame, reg); |
| 469 | continue; |
| 470 | } |
| 471 | default_print_registers_info (gdbarch, file, frame, reg, print_all); |
| 472 | } |
| 473 | } |
| 474 | else if (REG_CCW == reg_perm[regnum]) |
| 475 | s12z_print_ccw_info (gdbarch, file, frame, regnum); |
| 476 | else |
| 477 | default_print_registers_info (gdbarch, file, frame, regnum, print_all); |
| 478 | } |
| 479 | |
| 480 | \f |
| 481 | |
| 482 | |
| 483 | static void |
| 484 | s12z_extract_return_value (struct type *type, struct regcache *regcache, |
| 485 | void *valbuf) |
| 486 | { |
| 487 | int reg = -1; |
| 488 | |
| 489 | switch (TYPE_LENGTH (type)) |
| 490 | { |
| 491 | case 0: /* Nothing to do */ |
| 492 | return; |
| 493 | |
| 494 | case 1: |
| 495 | reg = REG_D0; |
| 496 | break; |
| 497 | |
| 498 | case 2: |
| 499 | reg = REG_D2; |
| 500 | break; |
| 501 | |
| 502 | case 3: |
| 503 | reg = REG_X; |
| 504 | break; |
| 505 | |
| 506 | case 4: |
| 507 | reg = REG_D6; |
| 508 | break; |
| 509 | |
| 510 | default: |
| 511 | error (_("bad size for return value")); |
| 512 | return; |
| 513 | } |
| 514 | |
| 515 | regcache->cooked_read (inv_reg_perm[reg], (gdb_byte *) valbuf); |
| 516 | } |
| 517 | |
| 518 | static enum return_value_convention |
| 519 | s12z_return_value (struct gdbarch *gdbarch, struct value *function, |
| 520 | struct type *type, struct regcache *regcache, |
| 521 | gdb_byte *readbuf, const gdb_byte *writebuf) |
| 522 | { |
| 523 | if (TYPE_CODE (type) == TYPE_CODE_STRUCT |
| 524 | || TYPE_CODE (type) == TYPE_CODE_UNION |
| 525 | || TYPE_CODE (type) == TYPE_CODE_ARRAY |
| 526 | || TYPE_LENGTH (type) > 4) |
| 527 | return RETURN_VALUE_STRUCT_CONVENTION; |
| 528 | |
| 529 | if (readbuf) |
| 530 | s12z_extract_return_value (type, regcache, readbuf); |
| 531 | |
| 532 | return RETURN_VALUE_REGISTER_CONVENTION; |
| 533 | } |
| 534 | |
| 535 | |
| 536 | static void |
| 537 | show_bdccsr_command (const char *args, int from_tty) |
| 538 | { |
| 539 | struct string_file output; |
| 540 | target_rcmd ("bdccsr", &output); |
| 541 | |
| 542 | printf_unfiltered ("The current BDCCSR value is %s\n", output.string().c_str()); |
| 543 | } |
| 544 | |
| 545 | static struct gdbarch * |
| 546 | s12z_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches) |
| 547 | { |
| 548 | struct gdbarch_tdep *tdep = XNEW (struct gdbarch_tdep); |
| 549 | struct gdbarch *gdbarch = gdbarch_alloc (&info, tdep); |
| 550 | |
| 551 | add_cmd ("bdccsr", class_support, show_bdccsr_command, |
| 552 | _("Show the current value of the microcontroller's BDCCSR."), |
| 553 | &maintenanceinfolist); |
| 554 | |
| 555 | /* Target data types. */ |
| 556 | set_gdbarch_short_bit (gdbarch, 16); |
| 557 | set_gdbarch_int_bit (gdbarch, 16); |
| 558 | set_gdbarch_long_bit (gdbarch, 32); |
| 559 | set_gdbarch_long_long_bit (gdbarch, 32); |
| 560 | set_gdbarch_ptr_bit (gdbarch, 24); |
| 561 | set_gdbarch_addr_bit (gdbarch, 24); |
| 562 | set_gdbarch_char_signed (gdbarch, 0); |
| 563 | |
| 564 | set_gdbarch_ps_regnum (gdbarch, REG_CCW); |
| 565 | set_gdbarch_pc_regnum (gdbarch, REG_P); |
| 566 | set_gdbarch_sp_regnum (gdbarch, REG_S); |
| 567 | |
| 568 | |
| 569 | set_gdbarch_print_registers_info (gdbarch, s12z_print_registers_info); |
| 570 | |
| 571 | set_gdbarch_breakpoint_kind_from_pc (gdbarch, |
| 572 | s12z_breakpoint::kind_from_pc); |
| 573 | set_gdbarch_sw_breakpoint_from_kind (gdbarch, |
| 574 | s12z_breakpoint::bp_from_kind); |
| 575 | |
| 576 | set_gdbarch_num_regs (gdbarch, N_PHYSICAL_REGISTERS); |
| 577 | set_gdbarch_register_name (gdbarch, s12z_register_name); |
| 578 | set_gdbarch_skip_prologue (gdbarch, s12z_skip_prologue); |
| 579 | set_gdbarch_inner_than (gdbarch, core_addr_lessthan); |
| 580 | set_gdbarch_dwarf2_reg_to_regnum (gdbarch, s12z_dwarf_reg_to_regnum); |
| 581 | |
| 582 | set_gdbarch_register_type (gdbarch, s12z_register_type); |
| 583 | |
| 584 | /* Functions to access frame data. */ |
| 585 | set_gdbarch_unwind_pc (gdbarch, s12z_unwind_pc); |
| 586 | set_gdbarch_unwind_sp (gdbarch, s12z_unwind_sp); |
| 587 | |
| 588 | frame_unwind_append_unwinder (gdbarch, &s12z_frame_unwind); |
| 589 | /* Currently, the only known producer for this archtecture, produces buggy |
| 590 | dwarf CFI. So don't append a dwarf unwinder until the situation is |
| 591 | better understood. */ |
| 592 | |
| 593 | set_gdbarch_return_value (gdbarch, s12z_return_value); |
| 594 | |
| 595 | return gdbarch; |
| 596 | } |
| 597 | |
| 598 | void |
| 599 | _initialize_s12z_tdep (void) |
| 600 | { |
| 601 | gdbarch_register (bfd_arch_s12z, s12z_gdbarch_init, NULL); |
| 602 | } |