gdb/armnbsd-nat.c

   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     regcache_raw_supply (current_regcache, regno, (char *) &gregset->r[regno]);
  49
  50   regcache_raw_supply (current_regcache, ARM_SP_REGNUM,
  51                        (char *) &gregset->r_sp);
  52   regcache_raw_supply (current_regcache, ARM_LR_REGNUM,
  53                        (char *) &gregset->r_lr);
  54   /* This is ok: we're running native...  */
  55   r_pc = ADDR_BITS_REMOVE (gregset->r_pc);
  56   regcache_raw_supply (current_regcache, ARM_PC_REGNUM, (char *) &r_pc);
  57
  58   if (arm_apcs_32)
  59     regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
  60                          (char *) &gregset->r_cpsr);
  61   else
  62     regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
  63                          (char *) &gregset->r_pc);
  64 }
  65
  66 static void
  67 supply_fparegset (struct fpreg *fparegset)
  68 {
  69   int regno;
  70
  71   for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
  72     regcache_raw_supply (current_regcache, regno,
  73                          (char *) &fparegset->fpr[regno - ARM_F0_REGNUM]);
  74
  75   regcache_raw_supply (current_regcache, ARM_FPS_REGNUM,
  76                        (char *) &fparegset->fpr_fpsr);
  77 }
  78
  79 static void
  80 fetch_register (int regno)
  81 {
  82   struct reg inferior_registers;
  83   int ret;
  84
  85   ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid),
  86                 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
  87
  88   if (ret < 0)
  89     {
  90       warning ("unable to fetch general register");
  91       return;
  92     }
  93
  94   switch (regno)
  95     {
  96     case ARM_SP_REGNUM:
  97       regcache_raw_supply (current_regcache, ARM_SP_REGNUM,
  98                            (char *) &inferior_registers.r_sp);
  99       break;
 100
 101     case ARM_LR_REGNUM:
 102       regcache_raw_supply (current_regcache, ARM_LR_REGNUM,
 103                            (char *) &inferior_registers.r_lr);
 104       break;
 105
 106     case ARM_PC_REGNUM:
 107       /* This is ok: we're running native... */
 108       inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc);
 109       regcache_raw_supply (current_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 (current_regcache, ARM_PS_REGNUM,
 116                              (char *) &inferior_registers.r_cpsr);
 117       else
 118         regcache_raw_supply (current_regcache, ARM_PS_REGNUM,
 119                              (char *) &inferior_registers.r_pc);
 120       break;
 121
 122     default:
 123       regcache_raw_supply (current_regcache, regno,
 124                            (char *) &inferior_registers.r[regno]);
 125       break;
 126     }
 127 }
 128
 129 static void
 130 fetch_regs (void)
 131 {
 132   struct reg inferior_registers;
 133   int ret;
 134   int regno;
 135
 136   ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 137                 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
 138
 139   if (ret < 0)
 140     {
 141       warning ("unable to fetch general registers");
 142       return;
 143     }
 144
 145   supply_gregset (&inferior_registers);
 146 }
 147
 148 static void
 149 fetch_fp_register (int regno)
 150 {
 151   struct fpreg inferior_fp_registers;
 152   int ret;
 153
 154   ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 155                 (PTRACE_ARG3_TYPE) &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 (current_regcache, ARM_FPS_REGNUM,
 167                            (char *) &inferior_fp_registers.fpr_fpsr);
 168       break;
 169
 170     default:
 171       regcache_raw_supply (current_regcache, regno,
 172                            (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]);
 173       break;
 174     }
 175 }
 176
 177 static void
 178 fetch_fp_regs (void)
 179 {
 180   struct fpreg inferior_fp_registers;
 181   int ret;
 182   int regno;
 183
 184   ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 185                 (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
 186
 187   if (ret < 0)
 188     {
 189       warning ("unable to fetch general registers");
 190       return;
 191     }
 192
 193   supply_fparegset (&inferior_fp_registers);
 194 }
 195
 196 void
 197 fetch_inferior_registers (int regno)
 198 {
 199   if (regno >= 0)
 200     {
 201       if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
 202         fetch_register (regno);
 203       else
 204         fetch_fp_register (regno);
 205     }
 206   else
 207     {
 208       fetch_regs ();
 209       fetch_fp_regs ();
 210     }
 211 }
 212
 213
 214 static void
 215 store_register (int regno)
 216 {
 217   struct reg inferior_registers;
 218   int ret;
 219
 220   ret = ptrace (PT_GETREGS, PIDGET (inferior_ptid),
 221                 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
 222
 223   if (ret < 0)
 224     {
 225       warning ("unable to fetch general registers");
 226       return;
 227     }
 228
 229   switch (regno)
 230     {
 231     case ARM_SP_REGNUM:
 232       regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp);
 233       break;
 234
 235     case ARM_LR_REGNUM:
 236       regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr);
 237       break;
 238
 239     case ARM_PC_REGNUM:
 240       if (arm_apcs_32)
 241         regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc);
 242       else
 243         {
 244           unsigned pc_val;
 245
 246           regcache_collect (ARM_PC_REGNUM, (char *) &pc_val);
 247
 248           pc_val = ADDR_BITS_REMOVE (pc_val);
 249           inferior_registers.r_pc
 250             ^= ADDR_BITS_REMOVE (inferior_registers.r_pc);
 251           inferior_registers.r_pc |= pc_val;
 252         }
 253       break;
 254
 255     case ARM_PS_REGNUM:
 256       if (arm_apcs_32)
 257         regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr);
 258       else
 259         {
 260           unsigned psr_val;
 261
 262           regcache_collect (ARM_PS_REGNUM, (char *) &psr_val);
 263
 264           psr_val ^= ADDR_BITS_REMOVE (psr_val);
 265           inferior_registers.r_pc = ADDR_BITS_REMOVE (inferior_registers.r_pc);
 266           inferior_registers.r_pc |= psr_val;
 267         }
 268       break;
 269
 270     default:
 271       regcache_collect (regno, (char *) &inferior_registers.r[regno]);
 272       break;
 273     }
 274
 275   ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 276                 (PTRACE_ARG3_TYPE) &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 (void)
 284 {
 285   struct reg inferior_registers;
 286   int ret;
 287   int regno;
 288
 289
 290   for (regno = ARM_A1_REGNUM; regno < ARM_SP_REGNUM; regno++)
 291     regcache_collect (regno, (char *) &inferior_registers.r[regno]);
 292
 293   regcache_collect (ARM_SP_REGNUM, (char *) &inferior_registers.r_sp);
 294   regcache_collect (ARM_LR_REGNUM, (char *) &inferior_registers.r_lr);
 295
 296   if (arm_apcs_32)
 297     {
 298       regcache_collect (ARM_PC_REGNUM, (char *) &inferior_registers.r_pc);
 299       regcache_collect (ARM_PS_REGNUM, (char *) &inferior_registers.r_cpsr);
 300     }
 301   else
 302     {
 303       unsigned pc_val;
 304       unsigned psr_val;
 305
 306       regcache_collect (ARM_PC_REGNUM, (char *) &pc_val);
 307       regcache_collect (ARM_PS_REGNUM, (char *) &psr_val);
 308
 309       pc_val = ADDR_BITS_REMOVE (pc_val);
 310       psr_val ^= ADDR_BITS_REMOVE (psr_val);
 311
 312       inferior_registers.r_pc = pc_val | psr_val;
 313     }
 314
 315   ret = ptrace (PT_SETREGS, PIDGET (inferior_ptid),
 316                 (PTRACE_ARG3_TYPE) &inferior_registers, 0);
 317
 318   if (ret < 0)
 319     warning ("unable to store general registers");
 320 }
 321
 322 static void
 323 store_fp_register (int regno)
 324 {
 325   struct fpreg inferior_fp_registers;
 326   int ret;
 327
 328   ret = ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
 329                 (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
 330
 331   if (ret < 0)
 332     {
 333       warning ("unable to fetch floating-point registers");
 334       return;
 335     }
 336
 337   switch (regno)
 338     {
 339     case ARM_FPS_REGNUM:
 340       regcache_collect (ARM_FPS_REGNUM,
 341                         (char *) &inferior_fp_registers.fpr_fpsr);
 342       break;
 343
 344     default:
 345       regcache_collect
 346         (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]);
 347       break;
 348     }
 349
 350   ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 351                 (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
 352
 353   if (ret < 0)
 354     warning ("unable to write register %d to inferior", regno);
 355 }
 356
 357 static void
 358 store_fp_regs (void)
 359 {
 360   struct fpreg inferior_fp_registers;
 361   int ret;
 362   int regno;
 363
 364
 365   for (regno = ARM_F0_REGNUM; regno <= ARM_F7_REGNUM; regno++)
 366     regcache_collect
 367       (regno, (char *) &inferior_fp_registers.fpr[regno - ARM_F0_REGNUM]);
 368
 369   regcache_collect (ARM_FPS_REGNUM, (char *) &inferior_fp_registers.fpr_fpsr);
 370
 371   ret = ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
 372                 (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0);
 373
 374   if (ret < 0)
 375     warning ("unable to store floating-point registers");
 376 }
 377
 378 void
 379 store_inferior_registers (int regno)
 380 {
 381   if (regno >= 0)
 382     {
 383       if (regno < ARM_F0_REGNUM || regno > ARM_FPS_REGNUM)
 384         store_register (regno);
 385       else
 386         store_fp_register (regno);
 387     }
 388   else
 389     {
 390       store_regs ();
 391       store_fp_regs ();
 392     }
 393 }
 394
 395 struct md_core
 396 {
 397   struct reg intreg;
 398   struct fpreg freg;
 399 };
 400
 401 static void
 402 fetch_core_registers (char *core_reg_sect, unsigned core_reg_size,
 403                       int which, CORE_ADDR ignore)
 404 {
 405   struct md_core *core_reg = (struct md_core *) core_reg_sect;
 406   int regno;
 407   CORE_ADDR r_pc;
 408
 409   supply_gregset (&core_reg->intreg);
 410   supply_fparegset (&core_reg->freg);
 411 }
 412
 413 static void
 414 fetch_elfcore_registers (char *core_reg_sect, unsigned core_reg_size,
 415                          int which, CORE_ADDR ignore)
 416 {
 417   struct reg gregset;
 418   struct fpreg fparegset;
 419
 420   switch (which)
 421     {
 422     case 0:     /* Integer registers.  */
 423       if (core_reg_size != sizeof (struct reg))
 424         warning ("wrong size of register set in core file");
 425       else
 426         {
 427           /* The memcpy may be unnecessary, but we can't really be sure
 428              of the alignment of the data in the core file.  */
 429           memcpy (&gregset, core_reg_sect, sizeof (gregset));
 430           supply_gregset (&gregset);
 431         }
 432       break;
 433
 434     case 2:
 435       if (core_reg_size != sizeof (struct fpreg))
 436         warning ("wrong size of FPA register set in core file");
 437       else
 438         {
 439           /* The memcpy may be unnecessary, but we can't really be sure
 440              of the alignment of the data in the core file.  */
 441           memcpy (&fparegset, core_reg_sect, sizeof (fparegset));
 442           supply_fparegset (&fparegset);
 443         }
 444       break;
 445
 446     default:
 447       /* Don't know what kind of register request this is; just ignore it.  */
 448       break;
 449     }
 450 }
 451
 452 static struct core_fns arm_netbsd_core_fns =
 453 {
 454   bfd_target_unknown_flavour,           /* core_flovour.  */
 455   default_check_format,                 /* check_format.  */
 456   default_core_sniffer,                 /* core_sniffer.  */
 457   fetch_core_registers,                 /* core_read_registers.  */
 458   NULL
 459 };
 460
 461 static struct core_fns arm_netbsd_elfcore_fns =
 462 {
 463   bfd_target_elf_flavour,               /* core_flovour.  */
 464   default_check_format,                 /* check_format.  */
 465   default_core_sniffer,                 /* core_sniffer.  */
 466   fetch_elfcore_registers,              /* core_read_registers.  */
 467   NULL
 468 };
 469
 470 void
 471 _initialize_arm_netbsd_nat (void)
 472 {
 473   deprecated_add_core_fns (&arm_netbsd_core_fns);
 474   deprecated_add_core_fns (&arm_netbsd_elfcore_fns);
 475 }