| 1 | /* Native-dependent code for BSD Unix running on ARM's, for GDB. |
| 2 | Copyright 1988, 1989, 1991, 1992, 1994, 1996, 1999, 2002 |
| 3 | 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 2 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, write to the Free Software |
| 19 | Foundation, Inc., 59 Temple Place - Suite 330, |
| 20 | Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | |
| 24 | #ifndef FETCH_INFERIOR_REGISTERS |
| 25 | #error Not FETCH_INFERIOR_REGISTERS |
| 26 | #endif /* !FETCH_INFERIOR_REGISTERS */ |
| 27 | |
| 28 | #include "arm-tdep.h" |
| 29 | |
| 30 | #include <sys/types.h> |
| 31 | #include <sys/ptrace.h> |
| 32 | #include <machine/reg.h> |
| 33 | #include <machine/frame.h> |
| 34 | #include "inferior.h" |
| 35 | #include "regcache.h" |
| 36 | #include "gdbcore.h" |
| 37 | |
| 38 | extern int arm_apcs_32; |
| 39 | |
| 40 | static void |
| 41 | supply_gregset (struct reg *gregset) |
| 42 | { |
| 43 | int regno; |
| 44 | CORE_ADDR r_pc; |
| 45 | |
| 46 | /* Integer registers. */ |
| 47 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 48 | supply_register (regno, (char *) &gregset->r[regno]); |
| 49 | |
| 50 | supply_register (ARM_SP_REGNUM, (char *) &gregset->r_sp); |
| 51 | supply_register (ARM_LR_REGNUM, (char *) &gregset->r_lr); |
| 52 | /* This is ok: we're running native... */ |
| 53 | r_pc = ADDR_BITS_REMOVE (gregset->r_pc); |
| 54 | supply_register (ARM_PC_REGNUM, (char *) &r_pc); |
| 55 | |
| 56 | if (arm_apcs_32) |
| 57 | supply_register (ARM_PS_REGNUM, (char *) &gregset->r_cpsr); |
| 58 | else |
| 59 | supply_register (ARM_PS_REGNUM, (char *) &gregset->r_pc); |
| 60 | } |
| 61 | |
| 62 | static void |
| 63 | supply_fparegset (struct fpreg *fparegset) |
| 64 | { |
| 65 | int regno; |
| 66 | |
| 67 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 68 | supply_register |
| 69 | (regno, (char *) &fparegset->fpr[regno - ARM_F0_REGNUM]); |
| 70 | |
| 71 | supply_register (ARM_FPS_REGNUM, (char *) &fparegset->fpr_fpsr); |
| 72 | } |
| 73 | |
| 74 | static void |
| 75 | fetch_register (int regno) |
| 76 | { |
| 77 | struct reg inferior_registers; |
| 78 | int ret; |
| 79 | |
| 80 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 81 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); |
| 82 | |
| 83 | if (ret < 0) |
| 84 | { |
| 85 | warning ("unable to fetch general register"); |
| 86 | return; |
| 87 | } |
| 88 | |
| 89 | switch (regno) |
| 90 | { |
| 91 | case ARM_SP_REGNUM: |
| 92 | supply_register (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 93 | break; |
| 94 | |
| 95 | case ARM_LR_REGNUM: |
| 96 | supply_register (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 97 | break; |
| 98 | |
| 99 | case ARM_PC_REGNUM: |
| 100 | /* This is ok: we're running native... */ |
| 101 | inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc); |
| 102 | supply_register (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| 103 | break; |
| 104 | |
| 105 | case ARM_PS_REGNUM: |
| 106 | if (arm_apcs_32) |
| 107 | supply_register (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); |
| 108 | else |
| 109 | supply_register (ARM_PS_REGNUM, (char *) &inferior_registers.r_pc); |
| 110 | break; |
| 111 | |
| 112 | default: |
| 113 | supply_register (regno, (char *) &inferior_registers.r[regno]); |
| 114 | break; |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | static void |
| 119 | fetch_regs (void) |
| 120 | { |
| 121 | struct reg inferior_registers; |
| 122 | int ret; |
| 123 | int regno; |
| 124 | |
| 125 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 126 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); |
| 127 | |
| 128 | if (ret < 0) |
| 129 | { |
| 130 | warning ("unable to fetch general registers"); |
| 131 | return; |
| 132 | } |
| 133 | |
| 134 | supply_gregset (&inferior_registers); |
| 135 | } |
| 136 | |
| 137 | static void |
| 138 | fetch_fp_register (int regno) |
| 139 | { |
| 140 | struct fpreg inferior_fp_registers; |
| 141 | int ret; |
| 142 | |
| 143 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 144 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); |
| 145 | |
| 146 | if (ret < 0) |
| 147 | { |
| 148 | warning ("unable to fetch floating-point register"); |
| 149 | return; |
| 150 | } |
| 151 | |
| 152 | switch (regno) |
| 153 | { |
| 154 | case ARM_FPS_REGNUM: |
| 155 | supply_register (ARM_FPS_REGNUM, |
| 156 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 157 | break; |
| 158 | |
| 159 | default: |
| 160 | supply_register |
| 161 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | |
| 166 | static void |
| 167 | fetch_fp_regs (void) |
| 168 | { |
| 169 | struct fpreg inferior_fp_registers; |
| 170 | int ret; |
| 171 | int regno; |
| 172 | |
| 173 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 174 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); |
| 175 | |
| 176 | if (ret < 0) |
| 177 | { |
| 178 | warning ("unable to fetch general registers"); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | supply_fparegset (&inferior_fp_registers); |
| 183 | } |
| 184 | |
| 185 | void |
| 186 | fetch_inferior_registers (int regno) |
| 187 | { |
| 188 | if (regno >= 0) |
| 189 | { |
| 190 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 191 | fetch_register (regno); |
| 192 | else |
| 193 | fetch_fp_register (regno); |
| 194 | } |
| 195 | else |
| 196 | { |
| 197 | fetch_regs (); |
| 198 | fetch_fp_regs (); |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | |
| 203 | static void |
| 204 | store_register (int regno) |
| 205 | { |
| 206 | struct reg inferior_registers; |
| 207 | int ret; |
| 208 | |
| 209 | ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid), |
| 210 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); |
| 211 | |
| 212 | if (ret < 0) |
| 213 | { |
| 214 | warning ("unable to fetch general registers"); |
| 215 | return; |
| 216 | } |
| 217 | |
| 218 | switch (regno) |
| 219 | { |
| 220 | case ARM_SP_REGNUM: |
| 221 | regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 222 | break; |
| 223 | |
| 224 | case ARM_LR_REGNUM: |
| 225 | regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 226 | break; |
| 227 | |
| 228 | case ARM_PC_REGNUM: |
| 229 | if (arm_apcs_32) |
| 230 | regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| 231 | else |
| 232 | { |
| 233 | unsigned pc_val; |
| 234 | |
| 235 | regcache_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| 236 | |
| 237 | pc_val = ADDR_BITS_REMOVE (pc_val); |
| 238 | inferior_registers.r_pc |
| 239 | ^= ADDR_BITS_REMOVE (inferior_registers.r_pc); |
| 240 | inferior_registers.r_pc |= pc_val; |
| 241 | } |
| 242 | break; |
| 243 | |
| 244 | case ARM_PS_REGNUM: |
| 245 | if (arm_apcs_32) |
| 246 | regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); |
| 247 | else |
| 248 | { |
| 249 | unsigned psr_val; |
| 250 | |
| 251 | regcache_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| 252 | |
| 253 | psr_val ^= ADDR_BITS_REMOVE (psr_val); |
| 254 | inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc); |
| 255 | inferior_registers.r_pc |= psr_val; |
| 256 | } |
| 257 | break; |
| 258 | |
| 259 | default: |
| 260 | regcache_collect (regno, (char *) &inferior_registers.r[regno]); |
| 261 | break; |
| 262 | } |
| 263 | |
| 264 | ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 265 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); |
| 266 | |
| 267 | if (ret < 0) |
| 268 | warning ("unable to write register %d to inferior", regno); |
| 269 | } |
| 270 | |
| 271 | static void |
| 272 | store_regs (void) |
| 273 | { |
| 274 | struct reg inferior_registers; |
| 275 | int ret; |
| 276 | int regno; |
| 277 | |
| 278 | |
| 279 | for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++) |
| 280 | regcache_collect (regno, (char *) &inferior_registers.r[regno]); |
| 281 | |
| 282 | regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp); |
| 283 | regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr); |
| 284 | |
| 285 | if (arm_apcs_32) |
| 286 | { |
| 287 | regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc); |
| 288 | regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr); |
| 289 | } |
| 290 | else |
| 291 | { |
| 292 | unsigned pc_val; |
| 293 | unsigned psr_val; |
| 294 | |
| 295 | regcache_collect (ARM_PC_REGNUM, (char *) &pc_val); |
| 296 | regcache_collect (ARM_PS_REGNUM, (char *) &psr_val); |
| 297 | |
| 298 | pc_val = ADDR_BITS_REMOVE (pc_val); |
| 299 | psr_val ^= ADDR_BITS_REMOVE (psr_val); |
| 300 | |
| 301 | inferior_registers.r_pc = pc_val | psr_val; |
| 302 | } |
| 303 | |
| 304 | ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid), |
| 305 | (PTRACE_ARG3_TYPE) &inferior_registers, 0); |
| 306 | |
| 307 | if (ret < 0) |
| 308 | warning ("unable to store general registers"); |
| 309 | } |
| 310 | |
| 311 | static void |
| 312 | store_fp_register (int regno) |
| 313 | { |
| 314 | struct fpreg inferior_fp_registers; |
| 315 | int ret; |
| 316 | |
| 317 | ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid), |
| 318 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); |
| 319 | |
| 320 | if (ret < 0) |
| 321 | { |
| 322 | warning ("unable to fetch floating-point registers"); |
| 323 | return; |
| 324 | } |
| 325 | |
| 326 | switch (regno) |
| 327 | { |
| 328 | case ARM_FPS_REGNUM: |
| 329 | regcache_collect (ARM_FPS_REGNUM, |
| 330 | (char *) &inferior_fp_registers.fpr_fpsr); |
| 331 | break; |
| 332 | |
| 333 | default: |
| 334 | regcache_collect |
| 335 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 336 | break; |
| 337 | } |
| 338 | |
| 339 | ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 340 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); |
| 341 | |
| 342 | if (ret < 0) |
| 343 | warning ("unable to write register %d to inferior", regno); |
| 344 | } |
| 345 | |
| 346 | static void |
| 347 | store_fp_regs (void) |
| 348 | { |
| 349 | struct fpreg inferior_fp_registers; |
| 350 | int ret; |
| 351 | int regno; |
| 352 | |
| 353 | |
| 354 | for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++) |
| 355 | regcache_collect |
| 356 | (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]); |
| 357 | |
| 358 | regcache_collect (ARM_FPS_REGNUM, (char *) &inferior_fp_registers.fpr_fpsr); |
| 359 | |
| 360 | ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid), |
| 361 | (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0); |
| 362 | |
| 363 | if (ret < 0) |
| 364 | warning ("unable to store floating-point registers"); |
| 365 | } |
| 366 | |
| 367 | void |
| 368 | store_inferior_registers (int regno) |
| 369 | { |
| 370 | if (regno >= 0) |
| 371 | { |
| 372 | if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM) |
| 373 | store_register (regno); |
| 374 | else |
| 375 | store_fp_register (regno); |
| 376 | } |
| 377 | else |
| 378 | { |
| 379 | store_regs (); |
| 380 | store_fp_regs (); |
| 381 | } |
| 382 | } |
| 383 | |
| 384 | struct md_core |
| 385 | { |
| 386 | struct reg intreg; |
| 387 | struct fpreg freg; |
| 388 | }; |
| 389 | |
| 390 | static void |
| 391 | fetch_core_registers (char *core_reg_sect, unsigned core_reg_size, |
| 392 | int which, CORE_ADDR ignore) |
| 393 | { |
| 394 | struct md_core *core_reg = (struct md_core *) core_reg_sect; |
| 395 | int regno; |
| 396 | CORE_ADDR r_pc; |
| 397 | |
| 398 | supply_gregset (&core_reg->intreg); |
| 399 | supply_fparegset (&core_reg->freg); |
| 400 | } |
| 401 | |
| 402 | static void |
| 403 | fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size, |
| 404 | int which, CORE_ADDR ignore) |
| 405 | { |
| 406 | struct reg gregset; |
| 407 | struct fpreg fparegset; |
| 408 | |
| 409 | switch (which) |
| 410 | { |
| 411 | case 0: /* Integer registers. */ |
| 412 | if (core_reg_size != sizeof (struct reg)) |
| 413 | warning ("wrong size of register set in core file"); |
| 414 | else |
| 415 | { |
| 416 | /* The memcpy may be unnecessary, but we can't really be sure |
| 417 | of the alignment of the data in the core file. */ |
| 418 | memcpy (&gregset, core_reg_sect, sizeof (gregset)); |
| 419 | supply_gregset (&gregset); |
| 420 | } |
| 421 | break; |
| 422 | |
| 423 | case 2: |
| 424 | if (core_reg_size != sizeof (struct fpreg)) |
| 425 | warning ("wrong size of FPA register set in core file"); |
| 426 | else |
| 427 | { |
| 428 | /* The memcpy may be unnecessary, but we can't really be sure |
| 429 | of the alignment of the data in the core file. */ |
| 430 | memcpy (&fparegset, core_reg_sect, sizeof (fparegset)); |
| 431 | supply_fparegset (&fparegset); |
| 432 | } |
| 433 | break; |
| 434 | |
| 435 | default: |
| 436 | /* Don't know what kind of register request this is; just ignore it. */ |
| 437 | break; |
| 438 | } |
| 439 | } |
| 440 | |
| 441 | static struct core_fns arm_netbsd_core_fns = |
| 442 | { |
| 443 | bfd_target_unknown_flavour, /* core_flovour. */ |
| 444 | default_check_format, /* check_format. */ |
| 445 | default_core_sniffer, /* core_sniffer. */ |
| 446 | fetch_core_registers, /* core_read_registers. */ |
| 447 | NULL |
| 448 | }; |
| 449 | |
| 450 | static struct core_fns arm_netbsd_elfcore_fns = |
| 451 | { |
| 452 | bfd_target_elf_flavour, /* core_flovour. */ |
| 453 | default_check_format, /* check_format. */ |
| 454 | default_core_sniffer, /* core_sniffer. */ |
| 455 | fetch_elfcore_registers, /* core_read_registers. */ |
| 456 | NULL |
| 457 | }; |
| 458 | |
| 459 | void |
| 460 | _initialize_arm_netbsd_nat (void) |
| 461 | { |
| 462 | add_core_fns (&arm_netbsd_core_fns); |
| 463 | add_core_fns (&arm_netbsd_elfcore_fns); |
| 464 | } |