| 1 | /* Native-dependent code for BSD Unix running on ARM's, for GDB. |
| 2 | |
| 3 | Copyright (C) 1988, 1989, 1991, 1992, 1994, 1996, 1999, 2002, 2004, 2007, |
| 4 | 2008, 2009 Free Software Foundation, Inc. |
| 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 | #include "gdbcore.h" |
| 23 | #include "inferior.h" |
| 24 | #include "regcache.h" |
| 25 | #include "target.h" |
| 26 | |
| 27 | #include "gdb_string.h" |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/ptrace.h> |
| 30 | #include <machine/reg.h> |
| 31 | #include <machine/frame.h> |
| 32 | |
| 33 | #include "arm-tdep.h" |
| 34 | #include "inf-ptrace.h" |
| 35 | |
| 36 | extern int arm_apcs_32; |
| 37 | |
| 38 | static void |
| 39 | arm_supply_gregset (struct regcache *regcache, struct reg *gregset) |
| 40 | { |
| 41 | int regno; |
| 42 | CORE_ADDR r_pc; |
| 43 | |
| 44 | /* Integer registers. */ |
| 45 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 46 | regcache_raw_supply (regcache, regno, (char *) &gregset->r[regno]); |
| 47 | |
| 48 | regcache_raw_supply (regcache, ARM_SP_REGNUM, |
| 49 | (char *) &gregset->r_sp); |
| 50 | regcache_raw_supply (regcache, ARM_LR_REGNUM, |
| 51 | (char *) &gregset->r_lr); |
| 52 | /* This is ok: we're running native... */ |
| 53 | r_pc = gdbarch_addr_bits_remove (get_regcache_arch (regcache), gregset->r_pc); |
| 54 | regcache_raw_supply (regcache, ARM_PC_REGNUM, (char *) &r_pc); |
| 55 | |
| 56 | if (arm_apcs_32) |
| 57 | regcache_raw_supply (regcache, ARM_PS_REGNUM, |
| 58 | (char *) &gregset->r_cpsr); |
| 59 | else |
| 60 | regcache_raw_supply (regcache, ARM_PS_REGNUM, |
| 61 | (char *) &gregset->r_pc); |
| 62 | } |
| 63 | |
| 64 | static void |
| 65 | arm_supply_fparegset (struct regcache *regcache, struct fpreg *fparegset) |
| 66 | { |
| 67 | int regno; |
| 68 | |
| 69 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 70 | regcache_raw_supply (regcache, regno, |
| 71 | (char *) &fparegset->fpr[regno - ARM_F0_REGNUM]); |
| 72 | |
| 73 | regcache_raw_supply (regcache, ARM_FPS_REGNUM, |
| 74 | (char *) &fparegset->fpr_fpsr); |
| 75 | } |
| 76 | |
| 77 | static void |
| 78 | fetch_register (struct regcache *regcache, int regno) |
| 79 | { |
| 80 | struct reg inferior_registers; |
| 81 | int ret; |
| 82 | |
| 83 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 84 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 85 | |
| 86 | if (ret < 0) |
| 87 | { |
| 88 | warning (_("unable to fetch general register")); |
| 89 | return; |
| 90 | } |
| 91 | |
| 92 | switch (regno) |
| 93 | { |
| 94 | case ARM_SP_REGNUM: |
| 95 | regcache_raw_supply (regcache, ARM_SP_REGNUM, |
| 96 | (char *) &inferior_registers.r_sp); |
| 97 | break; |
| 98 | |
| 99 | case ARM_LR_REGNUM: |
| 100 | regcache_raw_supply (regcache, ARM_LR_REGNUM, |
| 101 | (char *) &inferior_registers.r_lr); |
| 102 | break; |
| 103 | |
| 104 | case ARM_PC_REGNUM: |
| 105 | /* This is ok: we're running native... */ |
| 106 | inferior_registers.r_pc = gdbarch_addr_bits_remove |
| 107 | (get_regcache_arch (regcache), |
| 108 | inferior_registers.r_pc); |
| 109 | regcache_raw_supply (regcache, ARM_PC_REGNUM, |
| 110 | (char *) &inferior_registers.r_pc); |
| 111 | break; |
| 112 | |
| 113 | case ARM_PS_REGNUM: |
| 114 | if (arm_apcs_32) |
| 115 | regcache_raw_supply (regcache, ARM_PS_REGNUM, |
| 116 | (char *) &inferior_registers.r_cpsr); |
| 117 | else |
| 118 | regcache_raw_supply (regcache, ARM_PS_REGNUM, |
| 119 | (char *) &inferior_registers.r_pc); |
| 120 | break; |
| 121 | |
| 122 | default: |
| 123 | regcache_raw_supply (regcache, regno, |
| 124 | (char *) &inferior_registers.r[regno]); |
| 125 | break; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static void |
| 130 | fetch_regs (struct regcache *regcache) |
| 131 | { |
| 132 | struct reg inferior_registers; |
| 133 | int ret; |
| 134 | int regno; |
| 135 | |
| 136 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 137 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 138 | |
| 139 | if (ret < 0) |
| 140 | { |
| 141 | warning (_("unable to fetch general registers")); |
| 142 | return; |
| 143 | } |
| 144 | |
| 145 | arm_supply_gregset (regcache, &inferior_registers); |
| 146 | } |
| 147 | |
| 148 | static void |
| 149 | fetch_fp_register (struct regcache *regcache, int regno) |
| 150 | { |
| 151 | struct fpreg inferior_fp_registers; |
| 152 | int ret; |
| 153 | |
| 154 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 155 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 156 | |
| 157 | if (ret < 0) |
| 158 | { |
| 159 | warning (_("unable to fetch floating-point register")); |
| 160 | return; |
| 161 | } |
| 162 | |
| 163 | switch (regno) |
| 164 | { |
| 165 | case ARM_FPS_REGNUM: |
| 166 | regcache_raw_supply (regcache, ARM_FPS_REGNUM, |
| 167 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 168 | break; |
| 169 | |
| 170 | default: |
| 171 | regcache_raw_supply (regcache, regno, |
| 172 | (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 173 | break; |
| 174 | } |
| 175 | } |
| 176 | |
| 177 | static void |
| 178 | fetch_fp_regs (struct regcache *regcache) |
| 179 | { |
| 180 | struct fpreg inferior_fp_registers; |
| 181 | int ret; |
| 182 | int regno; |
| 183 | |
| 184 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 185 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 186 | |
| 187 | if (ret < 0) |
| 188 | { |
| 189 | warning (_("unable to fetch general registers")); |
| 190 | return; |
| 191 | } |
| 192 | |
| 193 | arm_supply_fparegset (regcache, &inferior_fp_registers); |
| 194 | } |
| 195 | |
| 196 | static void |
| 197 | armnbsd_fetch_registers (struct regcache *regcache, int regno) |
| 198 | { |
| 199 | if (regno >= 0) |
| 200 | { |
| 201 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 202 | fetch_register (regcache, regno); |
| 203 | else |
| 204 | fetch_fp_register (regcache, regno); |
| 205 | } |
| 206 | else |
| 207 | { |
| 208 | fetch_regs (regcache); |
| 209 | fetch_fp_regs (regcache); |
| 210 | } |
| 211 | } |
| 212 | |
| 213 | |
| 214 | static void |
| 215 | store_register (const struct regcache *regcache, int regno) |
| 216 | { |
| 217 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 218 | struct reg inferior_registers; |
| 219 | int ret; |
| 220 | |
| 221 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 222 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 223 | |
| 224 | if (ret < 0) |
| 225 | { |
| 226 | warning (_("unable to fetch general registers")); |
| 227 | return; |
| 228 | } |
| 229 | |
| 230 | switch (regno) |
| 231 | { |
| 232 | case ARM_SP_REGNUM: |
| 233 | regcache_raw_collect (regcache, ARM_SP_REGNUM, |
| 234 | (char *) &inferior_registers.r_sp); |
| 235 | break; |
| 236 | |
| 237 | case ARM_LR_REGNUM: |
| 238 | regcache_raw_collect (regcache, ARM_LR_REGNUM, |
| 239 | (char *) &inferior_registers.r_lr); |
| 240 | break; |
| 241 | |
| 242 | case ARM_PC_REGNUM: |
| 243 | if (arm_apcs_32) |
| 244 | regcache_raw_collect (regcache, ARM_PC_REGNUM, |
| 245 | (char *) &inferior_registers.r_pc); |
| 246 | else |
| 247 | { |
| 248 | unsigned pc_val; |
| 249 | |
| 250 | regcache_raw_collect (regcache, ARM_PC_REGNUM, |
| 251 | (char *) &pc_val); |
| 252 | |
| 253 | pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| 254 | inferior_registers.r_pc ^= gdbarch_addr_bits_remove |
| 255 | (gdbarch, inferior_registers.r_pc); |
| 256 | inferior_registers.r_pc |= pc_val; |
| 257 | } |
| 258 | break; |
| 259 | |
| 260 | case ARM_PS_REGNUM: |
| 261 | if (arm_apcs_32) |
| 262 | regcache_raw_collect (regcache, ARM_PS_REGNUM, |
| 263 | (char *) &inferior_registers.r_cpsr); |
| 264 | else |
| 265 | { |
| 266 | unsigned psr_val; |
| 267 | |
| 268 | regcache_raw_collect (regcache, ARM_PS_REGNUM, |
| 269 | (char *) &psr_val); |
| 270 | |
| 271 | psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| 272 | inferior_registers.r_pc = gdbarch_addr_bits_remove |
| 273 | (gdbarch, inferior_registers.r_pc); |
| 274 | inferior_registers.r_pc |= psr_val; |
| 275 | } |
| 276 | break; |
| 277 | |
| 278 | default: |
| 279 | regcache_raw_collect (regcache, regno, |
| 280 | (char *) &inferior_registers.r[regno]); |
| 281 | break; |
| 282 | } |
| 283 | |
| 284 | ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 285 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 286 | |
| 287 | if (ret < 0) |
| 288 | warning (_("unable to write register %d to inferior"), regno); |
| 289 | } |
| 290 | |
| 291 | static void |
| 292 | store_regs (const struct regcache *regcache) |
| 293 | { |
| 294 | struct gdbarch *gdbarch = get_regcache_arch (regcache); |
| 295 | struct reg inferior_registers; |
| 296 | int ret; |
| 297 | int regno; |
| 298 | |
| 299 | |
| 300 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 301 | regcache_raw_collect (regcache, regno, |
| 302 | (char *) &inferior_registers.r[regno]); |
| 303 | |
| 304 | regcache_raw_collect (regcache, ARM_SP_REGNUM, |
| 305 | (char *) &inferior_registers.r_sp); |
| 306 | regcache_raw_collect (regcache, ARM_LR_REGNUM, |
| 307 | (char *) &inferior_registers.r_lr); |
| 308 | |
| 309 | if (arm_apcs_32) |
| 310 | { |
| 311 | regcache_raw_collect (regcache, ARM_PC_REGNUM, |
| 312 | (char *) &inferior_registers.r_pc); |
| 313 | regcache_raw_collect (regcache, ARM_PS_REGNUM, |
| 314 | (char *) &inferior_registers.r_cpsr); |
| 315 | } |
| 316 | else |
| 317 | { |
| 318 | unsigned pc_val; |
| 319 | unsigned psr_val; |
| 320 | |
| 321 | regcache_raw_collect (regcache, ARM_PC_REGNUM, |
| 322 | (char *) &pc_val); |
| 323 | regcache_raw_collect (regcache, ARM_PS_REGNUM, |
| 324 | (char *) &psr_val); |
| 325 | |
| 326 | pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| 327 | psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| 328 | |
| 329 | inferior_registers.r_pc = pc_val | psr_val; |
| 330 | } |
| 331 | |
| 332 | ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 333 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 334 | |
| 335 | if (ret < 0) |
| 336 | warning (_("unable to store general registers")); |
| 337 | } |
| 338 | |
| 339 | static void |
| 340 | store_fp_register (const struct regcache *regcache, int regno) |
| 341 | { |
| 342 | struct fpreg inferior_fp_registers; |
| 343 | int ret; |
| 344 | |
| 345 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 346 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 347 | |
| 348 | if (ret < 0) |
| 349 | { |
| 350 | warning (_("unable to fetch floating-point registers")); |
| 351 | return; |
| 352 | } |
| 353 | |
| 354 | switch (regno) |
| 355 | { |
| 356 | case ARM_FPS_REGNUM: |
| 357 | regcache_raw_collect (regcache, ARM_FPS_REGNUM, |
| 358 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 359 | break; |
| 360 | |
| 361 | default: |
| 362 | regcache_raw_collect (regcache, regno, |
| 363 | (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 364 | break; |
| 365 | } |
| 366 | |
| 367 | ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 368 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 369 | |
| 370 | if (ret < 0) |
| 371 | warning (_("unable to write register %d to inferior"), regno); |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | store_fp_regs (const struct regcache *regcache) |
| 376 | { |
| 377 | struct fpreg inferior_fp_registers; |
| 378 | int ret; |
| 379 | int regno; |
| 380 | |
| 381 | |
| 382 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 383 | regcache_raw_collect (regcache, regno, |
| 384 | (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 385 | |
| 386 | regcache_raw_collect (regcache, ARM_FPS_REGNUM, |
| 387 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 388 | |
| 389 | ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 390 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 391 | |
| 392 | if (ret < 0) |
| 393 | warning (_("unable to store floating-point registers")); |
| 394 | } |
| 395 | |
| 396 | static void |
| 397 | armnbsd_store_registers (struct regcache *regcache, int regno) |
| 398 | { |
| 399 | if (regno >= 0) |
| 400 | { |
| 401 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 402 | store_register (regcache, regno); |
| 403 | else |
| 404 | store_fp_register (regcache, regno); |
| 405 | } |
| 406 | else |
| 407 | { |
| 408 | store_regs (regcache); |
| 409 | store_fp_regs (regcache); |
| 410 | } |
| 411 | } |
| 412 | |
| 413 | struct md_core |
| 414 | { |
| 415 | struct reg intreg; |
| 416 | struct fpreg freg; |
| 417 | }; |
| 418 | |
| 419 | static void |
| 420 | fetch_core_registers (struct regcache *regcache, |
| 421 | char *core_reg_sect, unsigned core_reg_size, |
| 422 | int which, CORE_ADDR ignore) |
| 423 | { |
| 424 | struct md_core *core_reg = (struct md_core *) core_reg_sect; |
| 425 | int regno; |
| 426 | CORE_ADDR r_pc; |
| 427 | |
| 428 | arm_supply_gregset (regcache, &core_reg->intreg); |
| 429 | arm_supply_fparegset (regcache, &core_reg->freg); |
| 430 | } |
| 431 | |
| 432 | static void |
| 433 | fetch_elfcore_registers (struct regcache *regcache, |
| 434 | char *core_reg_sect, unsigned core_reg_size, |
| 435 | int which, CORE_ADDR ignore) |
| 436 | { |
| 437 | struct reg gregset; |
| 438 | struct fpreg fparegset; |
| 439 | |
| 440 | switch (which) |
| 441 | { |
| 442 | case 0: /* Integer registers. */ |
| 443 | if (core_reg_size != sizeof (struct reg)) |
| 444 | warning (_("wrong size of register set in core file")); |
| 445 | else |
| 446 | { |
| 447 | /* The memcpy may be unnecessary, but we can't really be sure |
| 448 | of the alignment of the data in the core file. */ |
| 449 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); |
| 450 | arm_supply_gregset (regcache, &gregset); |
| 451 | } |
| 452 | break; |
| 453 | |
| 454 | case 2: |
| 455 | if (core_reg_size != sizeof (struct fpreg)) |
| 456 | warning (_("wrong size of FPA register set in core file")); |
| 457 | else |
| 458 | { |
| 459 | /* The memcpy may be unnecessary, but we can't really be sure |
| 460 | of the alignment of the data in the core file. */ |
| 461 | memcpy (&fparegset, core_reg_sect, sizeof (fparegset)); |
| 462 | arm_supply_fparegset (regcache, &fparegset); |
| 463 | } |
| 464 | break; |
| 465 | |
| 466 | default: |
| 467 | /* Don't know what kind of register request this is; just ignore it. */ |
| 468 | break; |
| 469 | } |
| 470 | } |
| 471 | |
| 472 | static struct core_fns arm_netbsd_core_fns = |
| 473 | { |
| 474 | bfd_target_unknown_flavour, /* core_flovour. */ |
| 475 | default_check_format, /* check_format. */ |
| 476 | default_core_sniffer, /* core_sniffer. */ |
| 477 | fetch_core_registers, /* core_read_registers. */ |
| 478 | NULL |
| 479 | }; |
| 480 | |
| 481 | static struct core_fns arm_netbsd_elfcore_fns = |
| 482 | { |
| 483 | bfd_target_elf_flavour, /* core_flovour. */ |
| 484 | default_check_format, /* check_format. */ |
| 485 | default_core_sniffer, /* core_sniffer. */ |
| 486 | fetch_elfcore_registers, /* core_read_registers. */ |
| 487 | NULL |
| 488 | }; |
| 489 | |
| 490 | void |
| 491 | _initialize_arm_netbsd_nat (void) |
| 492 | { |
| 493 | struct target_ops *t; |
| 494 | |
| 495 | t = inf_ptrace_target (); |
| 496 | t->to_fetch_registers = armnbsd_fetch_registers; |
| 497 | t->to_store_registers = armnbsd_store_registers; |
| 498 | add_target (t); |
| 499 | |
| 500 | deprecated_add_core_fns (&arm_netbsd_core_fns); |
| 501 | deprecated_add_core_fns (&arm_netbsd_elfcore_fns); |
| 502 | } |