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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   Copyright (C) 2008 by Spencer Oliver                                  *
   6  *   spen@spen-soft.co.uk                                                  *
   7  *                                                                         *
   8  *   Copyright (C) 2008 by Oyvind Harboe                                   *
   9  *   oyvind.harboe@zylin.com                                               *
  10  *                                                                         *
  11  *   This program is free software; you can redistribute it and/or modify  *
  12  *   it under the terms of the GNU General Public License as published by  *
  13  *   the Free Software Foundation; either version 2 of the License, or     *
  14  *   (at your option) any later version.                                   *
  15  *                                                                         *
  16  *   This program is distributed in the hope that it will be useful,       *
  17  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  18  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  19  *   GNU General Public License for more details.                          *
  20  *                                                                         *
  21  *   You should have received a copy of the GNU General Public License     *
  22  *   along with this program; if not, write to the                         *
  23  *   Free Software Foundation, Inc.,                                       *
  24  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  25  ***************************************************************************/
  26 #ifdef HAVE_CONFIG_H
  27 #include "config.h"
  28 #endif
  29
  30 #include "armv4_5.h"
  31 #include "arm_disassembler.h"
  32 #include "binarybuffer.h"
  33
  34
  35 struct bitfield_desc armv4_5_psr_bitfield_desc[] =
  36 {
  37         {"M[4:0]", 5},
  38         {"T", 1},
  39         {"F", 1},
  40         {"I", 1},
  41         {"reserved", 16},
  42         {"J", 1},
  43         {"reserved", 2},
  44         {"Q", 1},
  45         {"V", 1},
  46         {"C", 1},
  47         {"Z", 1},
  48         {"N", 1},
  49 };
  50
  51 char* armv4_5_core_reg_list[] =
  52 {
  53         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
  54
  55         "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
  56
  57         "r13_irq", "lr_irq",
  58
  59         "r13_svc", "lr_svc",
  60
  61         "r13_abt", "lr_abt",
  62
  63         "r13_und", "lr_und",
  64
  65         "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
  66 };
  67
  68 char * armv4_5_mode_strings_list[] =
  69 {
  70         "Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
  71 };
  72
  73 /* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
  74 char** armv4_5_mode_strings = armv4_5_mode_strings_list + 1;
  75
  76 char* armv4_5_state_strings[] =
  77 {
  78         "ARM", "Thumb", "Jazelle"
  79 };
  80
  81 int armv4_5_core_reg_arch_type = -1;
  82
  83 struct armv4_5_core_reg armv4_5_core_reg_list_arch_info[] =
  84 {
  85         {0, ARMV4_5_MODE_ANY, NULL, NULL},
  86         {1, ARMV4_5_MODE_ANY, NULL, NULL},
  87         {2, ARMV4_5_MODE_ANY, NULL, NULL},
  88         {3, ARMV4_5_MODE_ANY, NULL, NULL},
  89         {4, ARMV4_5_MODE_ANY, NULL, NULL},
  90         {5, ARMV4_5_MODE_ANY, NULL, NULL},
  91         {6, ARMV4_5_MODE_ANY, NULL, NULL},
  92         {7, ARMV4_5_MODE_ANY, NULL, NULL},
  93         {8, ARMV4_5_MODE_ANY, NULL, NULL},
  94         {9, ARMV4_5_MODE_ANY, NULL, NULL},
  95         {10, ARMV4_5_MODE_ANY, NULL, NULL},
  96         {11, ARMV4_5_MODE_ANY, NULL, NULL},
  97         {12, ARMV4_5_MODE_ANY, NULL, NULL},
  98         {13, ARMV4_5_MODE_USR, NULL, NULL},
  99         {14, ARMV4_5_MODE_USR, NULL, NULL},
 100         {15, ARMV4_5_MODE_ANY, NULL, NULL},
 101
 102         {8, ARMV4_5_MODE_FIQ, NULL, NULL},
 103         {9, ARMV4_5_MODE_FIQ, NULL, NULL},
 104         {10, ARMV4_5_MODE_FIQ, NULL, NULL},
 105         {11, ARMV4_5_MODE_FIQ, NULL, NULL},
 106         {12, ARMV4_5_MODE_FIQ, NULL, NULL},
 107         {13, ARMV4_5_MODE_FIQ, NULL, NULL},
 108         {14, ARMV4_5_MODE_FIQ, NULL, NULL},
 109
 110         {13, ARMV4_5_MODE_IRQ, NULL, NULL},
 111         {14, ARMV4_5_MODE_IRQ, NULL, NULL},
 112
 113         {13, ARMV4_5_MODE_SVC, NULL, NULL},
 114         {14, ARMV4_5_MODE_SVC, NULL, NULL},
 115
 116         {13, ARMV4_5_MODE_ABT, NULL, NULL},
 117         {14, ARMV4_5_MODE_ABT, NULL, NULL},
 118
 119         {13, ARMV4_5_MODE_UND, NULL, NULL},
 120         {14, ARMV4_5_MODE_UND, NULL, NULL},
 121
 122         {16, ARMV4_5_MODE_ANY, NULL, NULL},
 123         {16, ARMV4_5_MODE_FIQ, NULL, NULL},
 124         {16, ARMV4_5_MODE_IRQ, NULL, NULL},
 125         {16, ARMV4_5_MODE_SVC, NULL, NULL},
 126         {16, ARMV4_5_MODE_ABT, NULL, NULL},
 127         {16, ARMV4_5_MODE_UND, NULL, NULL}
 128 };
 129
 130 /* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
 131 int armv4_5_core_reg_map[7][17] =
 132 {
 133         {       /* USR */
 134                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 135         },
 136         {       /* FIQ */
 137                 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
 138         },
 139         {       /* IRQ */
 140                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
 141         },
 142         {       /* SVC */
 143                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
 144         },
 145         {       /* ABT */
 146                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
 147         },
 148         {       /* UND */
 149                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
 150         },
 151         {       /* SYS */
 152                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 153         }
 154 };
 155
 156 uint8_t armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 157
 158 reg_t armv4_5_gdb_dummy_fp_reg =
 159 {
 160         "GDB dummy floating-point register", armv4_5_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
 161 };
 162
 163 uint8_t armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0};
 164
 165 reg_t armv4_5_gdb_dummy_fps_reg =
 166 {
 167         "GDB dummy floating-point status register", armv4_5_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
 168 };
 169
 170 int armv4_5_get_core_reg(reg_t *reg)
 171 {
 172         int retval;
 173         struct armv4_5_core_reg *armv4_5 = reg->arch_info;
 174         target_t *target = armv4_5->target;
 175
 176         if (target->state != TARGET_HALTED)
 177         {
 178                 LOG_ERROR("Target not halted");
 179                 return ERROR_TARGET_NOT_HALTED;
 180         }
 181
 182         /* retval = armv4_5->armv4_5_common->full_context(target); */
 183         retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode);
 184
 185         return retval;
 186 }
 187
 188 int armv4_5_set_core_reg(reg_t *reg, uint8_t *buf)
 189 {
 190         struct armv4_5_core_reg *armv4_5 = reg->arch_info;
 191         target_t *target = armv4_5->target;
 192         struct armv4_5_common_s *armv4_5_target = target_to_armv4_5(target);
 193         uint32_t value = buf_get_u32(buf, 0, 32);
 194
 195         if (target->state != TARGET_HALTED)
 196         {
 197                 return ERROR_TARGET_NOT_HALTED;
 198         }
 199
 200         if (reg == &armv4_5_target->core_cache->reg_list[ARMV4_5_CPSR])
 201         {
 202                 if (value & 0x20)
 203                 {
 204                         /* T bit should be set */
 205                         if (armv4_5_target->core_state == ARMV4_5_STATE_ARM)
 206                         {
 207                                 /* change state to Thumb */
 208                                 LOG_DEBUG("changing to Thumb state");
 209                                 armv4_5_target->core_state = ARMV4_5_STATE_THUMB;
 210                         }
 211                 }
 212                 else
 213                 {
 214                         /* T bit should be cleared */
 215                         if (armv4_5_target->core_state == ARMV4_5_STATE_THUMB)
 216                         {
 217                                 /* change state to ARM */
 218                                 LOG_DEBUG("changing to ARM state");
 219                                 armv4_5_target->core_state = ARMV4_5_STATE_ARM;
 220                         }
 221                 }
 222
 223                 if (armv4_5_target->core_mode != (enum armv4_5_mode)(value & 0x1f))
 224                 {
 225                         LOG_DEBUG("changing ARM core mode to '%s'", armv4_5_mode_strings[armv4_5_mode_to_number(value & 0x1f)]);
 226                         armv4_5_target->core_mode = value & 0x1f;
 227                         armv4_5_target->write_core_reg(target, 16, ARMV4_5_MODE_ANY, value);
 228                 }
 229         }
 230
 231         buf_set_u32(reg->value, 0, 32, value);
 232         reg->dirty = 1;
 233         reg->valid = 1;
 234
 235         return ERROR_OK;
 236 }
 237
 238 int armv4_5_invalidate_core_regs(target_t *target)
 239 {
 240         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 241         int i;
 242
 243         for (i = 0; i < 37; i++)
 244         {
 245                 armv4_5->core_cache->reg_list[i].valid = 0;
 246                 armv4_5->core_cache->reg_list[i].dirty = 0;
 247         }
 248
 249         return ERROR_OK;
 250 }
 251
 252 struct reg_cache* armv4_5_build_reg_cache(target_t *target, struct arm *armv4_5_common)
 253 {
 254         int num_regs = 37;
 255         struct reg_cache *cache = malloc(sizeof(struct reg_cache));
 256         reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
 257         struct armv4_5_core_reg *arch_info = malloc(sizeof(struct armv4_5_core_reg) * num_regs);
 258         int i;
 259
 260         cache->name = "arm v4/5 registers";
 261         cache->next = NULL;
 262         cache->reg_list = reg_list;
 263         cache->num_regs = num_regs;
 264
 265         if (armv4_5_core_reg_arch_type == -1)
 266                 armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg);
 267
 268         register_init_dummy(&armv4_5_gdb_dummy_fp_reg);
 269         register_init_dummy(&armv4_5_gdb_dummy_fps_reg);
 270
 271         for (i = 0; i < 37; i++)
 272         {
 273                 arch_info[i] = armv4_5_core_reg_list_arch_info[i];
 274                 arch_info[i].target = target;
 275                 arch_info[i].armv4_5_common = armv4_5_common;
 276                 reg_list[i].name = armv4_5_core_reg_list[i];
 277                 reg_list[i].size = 32;
 278                 reg_list[i].value = calloc(1, 4);
 279                 reg_list[i].dirty = 0;
 280                 reg_list[i].valid = 0;
 281                 reg_list[i].bitfield_desc = NULL;
 282                 reg_list[i].num_bitfields = 0;
 283                 reg_list[i].arch_type = armv4_5_core_reg_arch_type;
 284                 reg_list[i].arch_info = &arch_info[i];
 285         }
 286
 287         return cache;
 288 }
 289
 290 int armv4_5_arch_state(struct target_s *target)
 291 {
 292         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 293
 294         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 295         {
 296                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 297                 exit(-1);
 298         }
 299
 300         LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8" PRIx32 " pc: 0x%8.8" PRIx32 "",
 301                          armv4_5_state_strings[armv4_5->core_state],
 302                          Jim_Nvp_value2name_simple(nvp_target_debug_reason, target->debug_reason)->name,
 303                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 304                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 305                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 306
 307         return ERROR_OK;
 308 }
 309
 310 COMMAND_HANDLER(handle_armv4_5_reg_command)
 311 {
 312         char output[128];
 313         int output_len;
 314         int mode, num;
 315         target_t *target = get_current_target(cmd_ctx);
 316         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 317
 318         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 319         {
 320                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 321                 return ERROR_OK;
 322         }
 323
 324         if (target->state != TARGET_HALTED)
 325         {
 326                 command_print(cmd_ctx, "error: target must be halted for register accesses");
 327                 return ERROR_OK;
 328         }
 329
 330         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 331                 return ERROR_FAIL;
 332
 333         for (num = 0; num <= 15; num++)
 334         {
 335                 output_len = 0;
 336                 for (mode = 0; mode < 6; mode++)
 337                 {
 338                         if (!ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).valid)
 339                         {
 340                                 armv4_5->full_context(target);
 341                         }
 342                         output_len += snprintf(output + output_len,
 343                                                128 - output_len,
 344                                                "%8s: %8.8" PRIx32 " ",
 345                                                ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name,
 346                                                buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32));
 347                 }
 348                 command_print(cmd_ctx, "%s", output);
 349         }
 350         command_print(cmd_ctx,
 351                       "    cpsr: %8.8" PRIx32 " spsr_fiq: %8.8" PRIx32 " spsr_irq: %8.8" PRIx32 " spsr_svc: %8.8" PRIx32 " spsr_abt: %8.8" PRIx32 " spsr_und: %8.8" PRIx32 "",
 352                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 353                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32),
 354                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_IRQ].value, 0, 32),
 355                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_SVC].value, 0, 32),
 356                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_ABT].value, 0, 32),
 357                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_UND].value, 0, 32));
 358
 359         return ERROR_OK;
 360 }
 361
 362 COMMAND_HANDLER(handle_armv4_5_core_state_command)
 363 {
 364         target_t *target = get_current_target(cmd_ctx);
 365         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 366
 367         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 368         {
 369                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 370                 return ERROR_OK;
 371         }
 372
 373         if (argc > 0)
 374         {
 375                 if (strcmp(args[0], "arm") == 0)
 376                 {
 377                         armv4_5->core_state = ARMV4_5_STATE_ARM;
 378                 }
 379                 if (strcmp(args[0], "thumb") == 0)
 380                 {
 381                         armv4_5->core_state = ARMV4_5_STATE_THUMB;
 382                 }
 383         }
 384
 385         command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
 386
 387         return ERROR_OK;
 388 }
 389
 390 COMMAND_HANDLER(handle_armv4_5_disassemble_command)
 391 {
 392         int retval = ERROR_OK;
 393         target_t *target = get_current_target(cmd_ctx);
 394         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 395         uint32_t address;
 396         int count = 1;
 397         int i;
 398         struct arm_instruction cur_instruction;
 399         uint32_t opcode;
 400         uint16_t thumb_opcode;
 401         int thumb = 0;
 402
 403         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 404         {
 405                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 406                 return ERROR_OK;
 407         }
 408
 409         switch (argc) {
 410         case 3:
 411                 if (strcmp(args[2], "thumb") != 0)
 412                         goto usage;
 413                 thumb = 1;
 414                 /* FALL THROUGH */
 415         case 2:
 416                 COMMAND_PARSE_NUMBER(int, args[1], count);
 417                 /* FALL THROUGH */
 418         case 1:
 419                 COMMAND_PARSE_NUMBER(u32, args[0], address);
 420                 if (address & 0x01) {
 421                         if (!thumb) {
 422                                 command_print(cmd_ctx, "Disassemble as Thumb");
 423                                 thumb = 1;
 424                         }
 425                         address &= ~1;
 426                 }
 427                 break;
 428         default:
 429 usage:
 430                 command_print(cmd_ctx,
 431                         "usage: armv4_5 disassemble <address> [<count> ['thumb']]");
 432                 return ERROR_OK;
 433         }
 434
 435         for (i = 0; i < count; i++)
 436         {
 437                 if (thumb)
 438                 {
 439                         if ((retval = target_read_u16(target, address, &thumb_opcode)) != ERROR_OK)
 440                         {
 441                                 return retval;
 442                         }
 443                         if ((retval = thumb_evaluate_opcode(thumb_opcode, address, &cur_instruction)) != ERROR_OK)
 444                         {
 445                                 return retval;
 446                         }
 447                 }
 448                 else {
 449                         if ((retval = target_read_u32(target, address, &opcode)) != ERROR_OK)
 450                         {
 451                                 return retval;
 452                         }
 453                         if ((retval = arm_evaluate_opcode(opcode, address, &cur_instruction)) != ERROR_OK)
 454                         {
 455                                 return retval;
 456                         }
 457                 }
 458                 command_print(cmd_ctx, "%s", cur_instruction.text);
 459                 address += (thumb) ? 2 : 4;
 460         }
 461
 462         return ERROR_OK;
 463 }
 464
 465 int armv4_5_register_commands(struct command_context_s *cmd_ctx)
 466 {
 467         command_t *armv4_5_cmd;
 468
 469         armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5",
 470                         NULL, COMMAND_ANY,
 471                         "armv4/5 specific commands");
 472
 473         register_command(cmd_ctx, armv4_5_cmd, "reg",
 474                         handle_armv4_5_reg_command, COMMAND_EXEC,
 475                         "display ARM core registers");
 476         register_command(cmd_ctx, armv4_5_cmd, "core_state",
 477                         handle_armv4_5_core_state_command, COMMAND_EXEC,
 478                         "display/change ARM core state <arm | thumb>");
 479         register_command(cmd_ctx, armv4_5_cmd, "disassemble",
 480                         handle_armv4_5_disassemble_command, COMMAND_EXEC,
 481                         "disassemble instructions <address> [<count> ['thumb']]");
 482
 483         return ERROR_OK;
 484 }
 485
 486 int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
 487 {
 488         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 489         int i;
 490
 491         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 492                 return ERROR_FAIL;
 493
 494         *reg_list_size = 26;
 495         *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
 496
 497         for (i = 0; i < 16; i++)
 498         {
 499                 (*reg_list)[i] = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i);
 500         }
 501
 502         for (i = 16; i < 24; i++)
 503         {
 504                 (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg;
 505         }
 506
 507         (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg;
 508         (*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR];
 509
 510         return ERROR_OK;
 511 }
 512
 513 /* wait for execution to complete and check exit point */
 514 static int armv4_5_run_algorithm_completion(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info)
 515 {
 516         int retval;
 517         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 518
 519         if ((retval = target_wait_state(target, TARGET_HALTED, timeout_ms)) != ERROR_OK)
 520         {
 521                 return retval;
 522         }
 523         if (target->state != TARGET_HALTED)
 524         {
 525                 if ((retval = target_halt(target)) != ERROR_OK)
 526                         return retval;
 527                 if ((retval = target_wait_state(target, TARGET_HALTED, 500)) != ERROR_OK)
 528                 {
 529                         return retval;
 530                 }
 531                 return ERROR_TARGET_TIMEOUT;
 532         }
 533
 534         /* fast exit: ARMv5+ code can use BKPT */
 535         if (exit_point && buf_get_u32(armv4_5->core_cache->reg_list[15].value,
 536                                 0, 32) != exit_point)
 537         {
 538                 LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4" PRIx32 "",
 539                         buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 540                 return ERROR_TARGET_TIMEOUT;
 541         }
 542
 543         return ERROR_OK;
 544 }
 545
 546 int armv4_5_run_algorithm_inner(struct target_s *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info, int (*run_it)(struct target_s *target, uint32_t exit_point, int timeout_ms, void *arch_info))
 547 {
 548         struct armv4_5_common_s *armv4_5 = target_to_armv4_5(target);
 549         struct armv4_5_algorithm *armv4_5_algorithm_info = arch_info;
 550         enum armv4_5_state core_state = armv4_5->core_state;
 551         enum armv4_5_mode core_mode = armv4_5->core_mode;
 552         uint32_t context[17];
 553         uint32_t cpsr;
 554         int exit_breakpoint_size = 0;
 555         int i;
 556         int retval = ERROR_OK;
 557         LOG_DEBUG("Running algorithm");
 558
 559         if (armv4_5_algorithm_info->common_magic != ARMV4_5_COMMON_MAGIC)
 560         {
 561                 LOG_ERROR("current target isn't an ARMV4/5 target");
 562                 return ERROR_TARGET_INVALID;
 563         }
 564
 565         if (target->state != TARGET_HALTED)
 566         {
 567                 LOG_WARNING("target not halted");
 568                 return ERROR_TARGET_NOT_HALTED;
 569         }
 570
 571         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 572                 return ERROR_FAIL;
 573
 574         /* armv5 and later can terminate with BKPT instruction; less overhead */
 575         if (!exit_point && armv4_5->is_armv4)
 576         {
 577                 LOG_ERROR("ARMv4 target needs HW breakpoint location");
 578                 return ERROR_FAIL;
 579         }
 580
 581         for (i = 0; i <= 16; i++)
 582         {
 583                 if (!ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid)
 584                         armv4_5->read_core_reg(target, i, armv4_5_algorithm_info->core_mode);
 585                 context[i] = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32);
 586         }
 587         cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32);
 588
 589         for (i = 0; i < num_mem_params; i++)
 590         {
 591                 if ((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
 592                 {
 593                         return retval;
 594                 }
 595         }
 596
 597         for (i = 0; i < num_reg_params; i++)
 598         {
 599                 reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
 600                 if (!reg)
 601                 {
 602                         LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 603                         exit(-1);
 604                 }
 605
 606                 if (reg->size != reg_params[i].size)
 607                 {
 608                         LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 609                         exit(-1);
 610                 }
 611
 612                 if ((retval = armv4_5_set_core_reg(reg, reg_params[i].value)) != ERROR_OK)
 613                 {
 614                         return retval;
 615                 }
 616         }
 617
 618         armv4_5->core_state = armv4_5_algorithm_info->core_state;
 619         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
 620                 exit_breakpoint_size = 4;
 621         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
 622                 exit_breakpoint_size = 2;
 623         else
 624         {
 625                 LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
 626                 exit(-1);
 627         }
 628
 629         if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
 630         {
 631                 LOG_DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode);
 632                 buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 5, armv4_5_algorithm_info->core_mode);
 633                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 634                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 635         }
 636
 637         /* terminate using a hardware or (ARMv5+) software breakpoint */
 638         if (exit_point && (retval = breakpoint_add(target, exit_point,
 639                                 exit_breakpoint_size, BKPT_HARD)) != ERROR_OK)
 640         {
 641                 LOG_ERROR("can't add HW breakpoint to terminate algorithm");
 642                 return ERROR_TARGET_FAILURE;
 643         }
 644
 645         if ((retval = target_resume(target, 0, entry_point, 1, 1)) != ERROR_OK)
 646         {
 647                 return retval;
 648         }
 649         int retvaltemp;
 650         retval = run_it(target, exit_point, timeout_ms, arch_info);
 651
 652         if (exit_point)
 653                 breakpoint_remove(target, exit_point);
 654
 655         if (retval != ERROR_OK)
 656                 return retval;
 657
 658         for (i = 0; i < num_mem_params; i++)
 659         {
 660                 if (mem_params[i].direction != PARAM_OUT)
 661                         if ((retvaltemp = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
 662                         {
 663                                         retval = retvaltemp;
 664                         }
 665         }
 666
 667         for (i = 0; i < num_reg_params; i++)
 668         {
 669                 if (reg_params[i].direction != PARAM_OUT)
 670                 {
 671
 672                         reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
 673                         if (!reg)
 674                         {
 675                                 LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 676                                 exit(-1);
 677                         }
 678
 679                         if (reg->size != reg_params[i].size)
 680                         {
 681                                 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 682                                 exit(-1);
 683                         }
 684
 685                         buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
 686                 }
 687         }
 688
 689         for (i = 0; i <= 16; i++)
 690         {
 691                 uint32_t regvalue;
 692                 regvalue = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32);
 693                 if (regvalue != context[i])
 694                 {
 695                         LOG_DEBUG("restoring register %s with value 0x%8.8" PRIx32 "", ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).name, context[i]);
 696                         buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32, context[i]);
 697                         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid = 1;
 698                         ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1;
 699                 }
 700         }
 701         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
 702         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 703         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 704
 705         armv4_5->core_state = core_state;
 706         armv4_5->core_mode = core_mode;
 707
 708         return retval;
 709 }
 710
 711 int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, struct mem_param *mem_params, int num_reg_params, struct reg_param *reg_params, uint32_t entry_point, uint32_t exit_point, int timeout_ms, void *arch_info)
 712 {
 713         return armv4_5_run_algorithm_inner(target, num_mem_params, mem_params, num_reg_params, reg_params, entry_point, exit_point, timeout_ms, arch_info, armv4_5_run_algorithm_completion);
 714 }
 715
 716 int armv4_5_init_arch_info(target_t *target, struct arm *armv4_5)
 717 {
 718         target->arch_info = armv4_5;
 719
 720         armv4_5->common_magic = ARMV4_5_COMMON_MAGIC;
 721         armv4_5->core_state = ARMV4_5_STATE_ARM;
 722         armv4_5->core_mode = ARMV4_5_MODE_USR;
 723
 724         return ERROR_OK;
 725 }