| 1 | /* Native-dependent code for BSD Unix running on ARM's, for GDB. |
| 2 | |
| 3 | Copyright (C) 1988-2020 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 "gdbcore.h" |
| 22 | #include "inferior.h" |
| 23 | #include "regcache.h" |
| 24 | #include "target.h" |
| 25 | #include <sys/types.h> |
| 26 | #include <sys/ptrace.h> |
| 27 | #include <machine/reg.h> |
| 28 | #include <machine/frame.h> |
| 29 | |
| 30 | #include "arm-tdep.h" |
| 31 | #include "inf-ptrace.h" |
| 32 | |
| 33 | class arm_netbsd_nat_target final : public inf_ptrace_target |
| 34 | { |
| 35 | public: |
| 36 | /* Add our register access methods. */ |
| 37 | void fetch_registers (struct regcache *, int) override; |
| 38 | void store_registers (struct regcache *, int) override; |
| 39 | }; |
| 40 | |
| 41 | static arm_netbsd_nat_target the_arm_netbsd_nat_target; |
| 42 | |
| 43 | static void |
| 44 | arm_supply_gregset (struct regcache *regcache, struct reg *gregset) |
| 45 | { |
| 46 | int regno; |
| 47 | CORE_ADDR r_pc; |
| 48 | |
| 49 | /* Integer registers. */ |
| 50 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 51 | regcache->raw_supply (regno, (char *) &gregset->r[regno]); |
| 52 | |
| 53 | regcache->raw_supply (ARM_SP_REGNUM, (char *) &gregset->r_sp); |
| 54 | regcache->raw_supply (ARM_LR_REGNUM, (char *) &gregset->r_lr); |
| 55 | /* This is ok: we're running native... */ |
| 56 | r_pc = gdbarch_addr_bits_remove (regcache->arch (), gregset->r_pc); |
| 57 | regcache->raw_supply (ARM_PC_REGNUM, (char *) &r_pc); |
| 58 | |
| 59 | if (arm_apcs_32) |
| 60 | regcache->raw_supply (ARM_PS_REGNUM, (char *) &gregset->r_cpsr); |
| 61 | else |
| 62 | regcache->raw_supply (ARM_PS_REGNUM, (char *) &gregset->r_pc); |
| 63 | } |
| 64 | |
| 65 | static void |
| 66 | arm_supply_fparegset (struct regcache *regcache, struct fpreg *fparegset) |
| 67 | { |
| 68 | int regno; |
| 69 | |
| 70 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 71 | regcache->raw_supply (regno, |
| 72 | (char *) &fparegset->fpr[regno - ARM_F0_REGNUM]); |
| 73 | |
| 74 | regcache->raw_supply (ARM_FPS_REGNUM, (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, regcache->ptid ().pid (), |
| 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 (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 96 | break; |
| 97 | |
| 98 | case ARM_LR_REGNUM: |
| 99 | regcache->raw_supply (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 100 | break; |
| 101 | |
| 102 | case ARM_PC_REGNUM: |
| 103 | /* This is ok: we're running native... */ |
| 104 | inferior_registers.r_pc = gdbarch_addr_bits_remove |
| 105 | (regcache->arch (), |
| 106 | inferior_registers.r_pc); |
| 107 | regcache->raw_supply (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| 108 | break; |
| 109 | |
| 110 | case ARM_PS_REGNUM: |
| 111 | if (arm_apcs_32) |
| 112 | regcache->raw_supply (ARM_PS_REGNUM, |
| 113 | (char *) &inferior_registers.r_cpsr); |
| 114 | else |
| 115 | regcache->raw_supply (ARM_PS_REGNUM, |
| 116 | (char *) &inferior_registers.r_pc); |
| 117 | break; |
| 118 | |
| 119 | default: |
| 120 | regcache->raw_supply (regno, (char *) &inferior_registers.r[regno]); |
| 121 | break; |
| 122 | } |
| 123 | } |
| 124 | |
| 125 | static void |
| 126 | fetch_regs (struct regcache *regcache) |
| 127 | { |
| 128 | struct reg inferior_registers; |
| 129 | int ret; |
| 130 | int regno; |
| 131 | |
| 132 | ret = ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| 133 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 134 | |
| 135 | if (ret < 0) |
| 136 | { |
| 137 | warning (_("unable to fetch general registers")); |
| 138 | return; |
| 139 | } |
| 140 | |
| 141 | arm_supply_gregset (regcache, &inferior_registers); |
| 142 | } |
| 143 | |
| 144 | static void |
| 145 | fetch_fp_register (struct regcache *regcache, int regno) |
| 146 | { |
| 147 | struct fpreg inferior_fp_registers; |
| 148 | int ret; |
| 149 | |
| 150 | ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| 151 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 152 | |
| 153 | if (ret < 0) |
| 154 | { |
| 155 | warning (_("unable to fetch floating-point register")); |
| 156 | return; |
| 157 | } |
| 158 | |
| 159 | switch (regno) |
| 160 | { |
| 161 | case ARM_FPS_REGNUM: |
| 162 | regcache->raw_supply (ARM_FPS_REGNUM, |
| 163 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 164 | break; |
| 165 | |
| 166 | default: |
| 167 | regcache->raw_supply |
| 168 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 169 | break; |
| 170 | } |
| 171 | } |
| 172 | |
| 173 | static void |
| 174 | fetch_fp_regs (struct regcache *regcache) |
| 175 | { |
| 176 | struct fpreg inferior_fp_registers; |
| 177 | int ret; |
| 178 | int regno; |
| 179 | |
| 180 | ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| 181 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 182 | |
| 183 | if (ret < 0) |
| 184 | { |
| 185 | warning (_("unable to fetch general registers")); |
| 186 | return; |
| 187 | } |
| 188 | |
| 189 | arm_supply_fparegset (regcache, &inferior_fp_registers); |
| 190 | } |
| 191 | |
| 192 | void |
| 193 | arm_nbsd_nat_target::fetch_registers (struct regcache *regcache, int regno) |
| 194 | { |
| 195 | if (regno >= 0) |
| 196 | { |
| 197 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 198 | fetch_register (regcache, regno); |
| 199 | else |
| 200 | fetch_fp_register (regcache, regno); |
| 201 | } |
| 202 | else |
| 203 | { |
| 204 | fetch_regs (regcache); |
| 205 | fetch_fp_regs (regcache); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | |
| 210 | static void |
| 211 | store_register (const struct regcache *regcache, int regno) |
| 212 | { |
| 213 | struct gdbarch *gdbarch = regcache->arch (); |
| 214 | struct reg inferior_registers; |
| 215 | int ret; |
| 216 | |
| 217 | ret = ptrace (PT_GETREGS, regcache->ptid ().pid (), |
| 218 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 219 | |
| 220 | if (ret < 0) |
| 221 | { |
| 222 | warning (_("unable to fetch general registers")); |
| 223 | return; |
| 224 | } |
| 225 | |
| 226 | switch (regno) |
| 227 | { |
| 228 | case ARM_SP_REGNUM: |
| 229 | regcache->raw_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 230 | break; |
| 231 | |
| 232 | case ARM_LR_REGNUM: |
| 233 | regcache->raw_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 234 | break; |
| 235 | |
| 236 | case ARM_PC_REGNUM: |
| 237 | if (arm_apcs_32) |
| 238 | regcache->raw_collect (ARM_PC_REGNUM, |
| 239 | (char *) &inferior_registers.r_pc); |
| 240 | else |
| 241 | { |
| 242 | unsigned pc_val; |
| 243 | |
| 244 | regcache->raw_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| 245 | |
| 246 | pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| 247 | inferior_registers.r_pc ^= gdbarch_addr_bits_remove |
| 248 | (gdbarch, inferior_registers.r_pc); |
| 249 | inferior_registers.r_pc |= pc_val; |
| 250 | } |
| 251 | break; |
| 252 | |
| 253 | case ARM_PS_REGNUM: |
| 254 | if (arm_apcs_32) |
| 255 | regcache->raw_collect (ARM_PS_REGNUM, |
| 256 | (char *) &inferior_registers.r_cpsr); |
| 257 | else |
| 258 | { |
| 259 | unsigned psr_val; |
| 260 | |
| 261 | regcache->raw_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| 262 | |
| 263 | psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| 264 | inferior_registers.r_pc = gdbarch_addr_bits_remove |
| 265 | (gdbarch, inferior_registers.r_pc); |
| 266 | inferior_registers.r_pc |= psr_val; |
| 267 | } |
| 268 | break; |
| 269 | |
| 270 | default: |
| 271 | regcache->raw_collect (regno, (char *) &inferior_registers.r[regno]); |
| 272 | break; |
| 273 | } |
| 274 | |
| 275 | ret = ptrace (PT_SETREGS, regcache->ptid ().pid (), |
| 276 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 277 | |
| 278 | if (ret < 0) |
| 279 | warning (_("unable to write register %d to inferior"), regno); |
| 280 | } |
| 281 | |
| 282 | static void |
| 283 | store_regs (const struct regcache *regcache) |
| 284 | { |
| 285 | struct gdbarch *gdbarch = regcache->arch (); |
| 286 | struct reg inferior_registers; |
| 287 | int ret; |
| 288 | int regno; |
| 289 | |
| 290 | |
| 291 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 292 | regcache->raw_collect (regno, (char *) &inferior_registers.r[regno]); |
| 293 | |
| 294 | regcache->raw_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 295 | regcache->raw_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 296 | |
| 297 | if (arm_apcs_32) |
| 298 | { |
| 299 | regcache->raw_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| 300 | regcache->raw_collect (ARM_PS_REGNUM, |
| 301 | (char *) &inferior_registers.r_cpsr); |
| 302 | } |
| 303 | else |
| 304 | { |
| 305 | unsigned pc_val; |
| 306 | unsigned psr_val; |
| 307 | |
| 308 | regcache->raw_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| 309 | regcache->raw_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| 310 | |
| 311 | pc_val = gdbarch_addr_bits_remove (gdbarch, pc_val); |
| 312 | psr_val ^= gdbarch_addr_bits_remove (gdbarch, psr_val); |
| 313 | |
| 314 | inferior_registers.r_pc = pc_val | psr_val; |
| 315 | } |
| 316 | |
| 317 | ret = ptrace (PT_SETREGS, regcache->ptid ().pid (), |
| 318 | (PTRACE_TYPE_ARG3) &inferior_registers, 0); |
| 319 | |
| 320 | if (ret < 0) |
| 321 | warning (_("unable to store general registers")); |
| 322 | } |
| 323 | |
| 324 | static void |
| 325 | store_fp_register (const struct regcache *regcache, int regno) |
| 326 | { |
| 327 | struct fpreg inferior_fp_registers; |
| 328 | int ret; |
| 329 | |
| 330 | ret = ptrace (PT_GETFPREGS, regcache->ptid ().pid (), |
| 331 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 332 | |
| 333 | if (ret < 0) |
| 334 | { |
| 335 | warning (_("unable to fetch floating-point registers")); |
| 336 | return; |
| 337 | } |
| 338 | |
| 339 | switch (regno) |
| 340 | { |
| 341 | case ARM_FPS_REGNUM: |
| 342 | regcache->raw_collect (ARM_FPS_REGNUM, |
| 343 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 344 | break; |
| 345 | |
| 346 | default: |
| 347 | regcache->raw_collect |
| 348 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 349 | break; |
| 350 | } |
| 351 | |
| 352 | ret = ptrace (PT_SETFPREGS, regcache->ptid ().pid (), |
| 353 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 354 | |
| 355 | if (ret < 0) |
| 356 | warning (_("unable to write register %d to inferior"), regno); |
| 357 | } |
| 358 | |
| 359 | static void |
| 360 | store_fp_regs (const struct regcache *regcache) |
| 361 | { |
| 362 | struct fpreg inferior_fp_registers; |
| 363 | int ret; |
| 364 | int regno; |
| 365 | |
| 366 | |
| 367 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 368 | regcache->raw_collect |
| 369 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 370 | |
| 371 | regcache->raw_collect (ARM_FPS_REGNUM, |
| 372 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 373 | |
| 374 | ret = ptrace (PT_SETFPREGS, regcache->ptid ().pid (), |
| 375 | (PTRACE_TYPE_ARG3) &inferior_fp_registers, 0); |
| 376 | |
| 377 | if (ret < 0) |
| 378 | warning (_("unable to store floating-point registers")); |
| 379 | } |
| 380 | |
| 381 | void |
| 382 | arm_nbsd_nat_target::store_registers (struct regcache *regcache, int regno) |
| 383 | { |
| 384 | if (regno >= 0) |
| 385 | { |
| 386 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 387 | store_register (regcache, regno); |
| 388 | else |
| 389 | store_fp_register (regcache, regno); |
| 390 | } |
| 391 | else |
| 392 | { |
| 393 | store_regs (regcache); |
| 394 | store_fp_regs (regcache); |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | static void |
| 399 | fetch_elfcore_registers (struct regcache *regcache, |
| 400 | char *core_reg_sect, unsigned core_reg_size, |
| 401 | int which, CORE_ADDR ignore) |
| 402 | { |
| 403 | struct reg gregset; |
| 404 | struct fpreg fparegset; |
| 405 | |
| 406 | switch (which) |
| 407 | { |
| 408 | case 0: /* Integer registers. */ |
| 409 | if (core_reg_size != sizeof (struct reg)) |
| 410 | warning (_("wrong size of register set in core file")); |
| 411 | else |
| 412 | { |
| 413 | /* The memcpy may be unnecessary, but we can't really be sure |
| 414 | of the alignment of the data in the core file. */ |
| 415 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); |
| 416 | arm_supply_gregset (regcache, &gregset); |
| 417 | } |
| 418 | break; |
| 419 | |
| 420 | case 2: |
| 421 | if (core_reg_size != sizeof (struct fpreg)) |
| 422 | warning (_("wrong size of FPA register set in core file")); |
| 423 | else |
| 424 | { |
| 425 | /* The memcpy may be unnecessary, but we can't really be sure |
| 426 | of the alignment of the data in the core file. */ |
| 427 | memcpy (&fparegset, core_reg_sect, sizeof (fparegset)); |
| 428 | arm_supply_fparegset (regcache, &fparegset); |
| 429 | } |
| 430 | break; |
| 431 | |
| 432 | default: |
| 433 | /* Don't know what kind of register request this is; just ignore it. */ |
| 434 | break; |
| 435 | } |
| 436 | } |
| 437 | |
| 438 | static struct core_fns arm_netbsd_elfcore_fns = |
| 439 | { |
| 440 | bfd_target_elf_flavour, /* core_flavour. */ |
| 441 | default_check_format, /* check_format. */ |
| 442 | default_core_sniffer, /* core_sniffer. */ |
| 443 | fetch_elfcore_registers, /* core_read_registers. */ |
| 444 | NULL |
| 445 | }; |
| 446 | |
| 447 | void |
| 448 | _initialize_arm_netbsd_nat (void) |
| 449 | { |
| 450 | add_inf_child_target (&the_arm_netbsd_nat_target); |
| 451 | |
| 452 | deprecated_add_core_fns (&arm_netbsd_elfcore_fns); |
| 453 | } |