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   1 /***************************************************************************
   2  *   Copyright (C) 2005 by Dominic Rath                                    *
   3  *   Dominic.Rath@gmx.de                                                   *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20 #ifdef HAVE_CONFIG_H
  21 #include "config.h"
  22 #endif
  23
  24 #include "replacements.h"
  25
  26 #include "arm_disassembler.h"
  27
  28 #include "armv4_5.h"
  29
  30 #include "target.h"
  31 #include "register.h"
  32 #include "log.h"
  33 #include "binarybuffer.h"
  34 #include "command.h"
  35
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39
  40 bitfield_desc_t armv4_5_psr_bitfield_desc[] =
  41 {
  42         {"M[4:0]", 5},
  43         {"T", 1},
  44         {"F", 1},
  45         {"I", 1},
  46         {"reserved", 16},
  47         {"J", 1},
  48         {"reserved", 2},
  49         {"Q", 1},
  50         {"V", 1},
  51         {"C", 1},
  52         {"Z", 1},
  53         {"N", 1},
  54 };
  55
  56 char* armv4_5_core_reg_list[] =
  57 {
  58         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
  59
  60         "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
  61
  62         "r13_irq", "lr_irq",
  63
  64         "r13_svc", "lr_svc",
  65
  66         "r13_abt", "lr_abt",
  67
  68         "r13_und", "lr_und",
  69
  70         "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
  71 };
  72
  73 char * armv4_5_mode_strings_list[] =
  74 {
  75         "Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
  76 };
  77
  78 /* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
  79 char** armv4_5_mode_strings = armv4_5_mode_strings_list+1;
  80
  81 char* armv4_5_state_strings[] =
  82 {
  83         "ARM", "Thumb", "Jazelle"
  84 };
  85
  86 int armv4_5_core_reg_arch_type = -1;
  87
  88 armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] =
  89 {
  90         {0, ARMV4_5_MODE_ANY, NULL, NULL},
  91         {1, ARMV4_5_MODE_ANY, NULL, NULL},
  92         {2, ARMV4_5_MODE_ANY, NULL, NULL},
  93         {3, ARMV4_5_MODE_ANY, NULL, NULL},
  94         {4, ARMV4_5_MODE_ANY, NULL, NULL},
  95         {5, ARMV4_5_MODE_ANY, NULL, NULL},
  96         {6, ARMV4_5_MODE_ANY, NULL, NULL},
  97         {7, ARMV4_5_MODE_ANY, NULL, NULL},
  98         {8, ARMV4_5_MODE_ANY, NULL, NULL},
  99         {9, ARMV4_5_MODE_ANY, NULL, NULL},
 100         {10, ARMV4_5_MODE_ANY, NULL, NULL},
 101         {11, ARMV4_5_MODE_ANY, NULL, NULL},
 102         {12, ARMV4_5_MODE_ANY, NULL, NULL},
 103         {13, ARMV4_5_MODE_USR, NULL, NULL},
 104         {14, ARMV4_5_MODE_USR, NULL, NULL},
 105         {15, ARMV4_5_MODE_ANY, NULL, NULL},
 106
 107         {8, ARMV4_5_MODE_FIQ, NULL, NULL},
 108         {9, ARMV4_5_MODE_FIQ, NULL, NULL},
 109         {10, ARMV4_5_MODE_FIQ, NULL, NULL},
 110         {11, ARMV4_5_MODE_FIQ, NULL, NULL},
 111         {12, ARMV4_5_MODE_FIQ, NULL, NULL},
 112         {13, ARMV4_5_MODE_FIQ, NULL, NULL},
 113         {14, ARMV4_5_MODE_FIQ, NULL, NULL},
 114
 115         {13, ARMV4_5_MODE_IRQ, NULL, NULL},
 116         {14, ARMV4_5_MODE_IRQ, NULL, NULL},
 117
 118         {13, ARMV4_5_MODE_SVC, NULL, NULL},
 119         {14, ARMV4_5_MODE_SVC, NULL, NULL},
 120
 121         {13, ARMV4_5_MODE_ABT, NULL, NULL},
 122         {14, ARMV4_5_MODE_ABT, NULL, NULL},
 123
 124         {13, ARMV4_5_MODE_UND, NULL, NULL},
 125         {14, ARMV4_5_MODE_UND, NULL, NULL},
 126
 127         {16, ARMV4_5_MODE_ANY, NULL, NULL},
 128         {16, ARMV4_5_MODE_FIQ, NULL, NULL},
 129         {16, ARMV4_5_MODE_IRQ, NULL, NULL},
 130         {16, ARMV4_5_MODE_SVC, NULL, NULL},
 131         {16, ARMV4_5_MODE_ABT, NULL, NULL},
 132         {16, ARMV4_5_MODE_UND, NULL, NULL}
 133 };
 134
 135 /* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
 136 int armv4_5_core_reg_map[7][17] =
 137 {
 138         {       /* USR */
 139                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 140         },
 141         {       /* FIQ */
 142                 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
 143         },
 144         {       /* IRQ */
 145                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
 146         },
 147         {       /* SVC */
 148                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
 149         },
 150         {       /* ABT */
 151                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
 152         },
 153         {       /* UND */
 154                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
 155         },
 156         {       /* SYS */
 157                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 158         }
 159 };
 160
 161 u8 armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 162
 163 reg_t armv4_5_gdb_dummy_fp_reg =
 164 {
 165         "GDB dummy floating-point register", armv4_5_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
 166 };
 167
 168 u8 armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0};
 169
 170 reg_t armv4_5_gdb_dummy_fps_reg =
 171 {
 172         "GDB dummy floating-point status register", armv4_5_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
 173 };
 174
 175
 176 int armv4_5_get_core_reg(reg_t *reg)
 177 {
 178         int retval;
 179         armv4_5_core_reg_t *armv4_5 = reg->arch_info;
 180         target_t *target = armv4_5->target;
 181
 182         if (target->state != TARGET_HALTED)
 183         {
 184                 return ERROR_TARGET_NOT_HALTED;
 185         }
 186
 187         /* retval = armv4_5->armv4_5_common->full_context(target); */
 188         retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode);
 189
 190         return retval;
 191 }
 192
 193 int armv4_5_set_core_reg(reg_t *reg, u8 *buf)
 194 {
 195         armv4_5_core_reg_t *armv4_5 = reg->arch_info;
 196         target_t *target = armv4_5->target;
 197         armv4_5_common_t *armv4_5_target = target->arch_info;
 198         u32 value = buf_get_u32(buf, 0, 32);
 199
 200         if (target->state != TARGET_HALTED)
 201         {
 202                 return ERROR_TARGET_NOT_HALTED;
 203         }
 204
 205         if (reg == &armv4_5_target->core_cache->reg_list[ARMV4_5_CPSR])
 206         {
 207                 if (value & 0x20)
 208                 {
 209                         /* T bit should be set */
 210                         if (armv4_5_target->core_state == ARMV4_5_STATE_ARM)
 211                         {
 212                                 /* change state to Thumb */
 213                                 LOG_DEBUG("changing to Thumb state");
 214                                 armv4_5_target->core_state = ARMV4_5_STATE_THUMB;
 215                         }
 216                 }
 217                 else
 218                 {
 219                         /* T bit should be cleared */
 220                         if (armv4_5_target->core_state == ARMV4_5_STATE_THUMB)
 221                         {
 222                                 /* change state to ARM */
 223                                 LOG_DEBUG("changing to ARM state");
 224                                 armv4_5_target->core_state = ARMV4_5_STATE_ARM;
 225                         }
 226                 }
 227
 228                 if (armv4_5_target->core_mode != (value & 0x1f))
 229                 {
 230                         LOG_DEBUG("changing ARM core mode to '%s'", armv4_5_mode_strings[armv4_5_mode_to_number(value & 0x1f)]);
 231                         armv4_5_target->core_mode = value & 0x1f;
 232                         armv4_5_target->write_core_reg(target, 16, ARMV4_5_MODE_ANY, value);
 233                 }
 234         }
 235
 236         buf_set_u32(reg->value, 0, 32, value);
 237         reg->dirty = 1;
 238         reg->valid = 1;
 239
 240         return ERROR_OK;
 241 }
 242
 243 int armv4_5_invalidate_core_regs(target_t *target)
 244 {
 245         armv4_5_common_t *armv4_5 = target->arch_info;
 246         int i;
 247
 248         for (i = 0; i < 37; i++)
 249         {
 250                 armv4_5->core_cache->reg_list[i].valid = 0;
 251                 armv4_5->core_cache->reg_list[i].dirty = 0;
 252         }
 253
 254         return ERROR_OK;
 255 }
 256
 257 reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5_common)
 258 {
 259         int num_regs = 37;
 260         reg_cache_t *cache = malloc(sizeof(reg_cache_t));
 261         reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
 262         armv4_5_core_reg_t *arch_info = malloc(sizeof(armv4_5_core_reg_t) * num_regs);
 263         int i;
 264
 265         cache->name = "arm v4/5 registers";
 266         cache->next = NULL;
 267         cache->reg_list = reg_list;
 268         cache->num_regs = num_regs;
 269
 270         if (armv4_5_core_reg_arch_type == -1)
 271                 armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg);
 272
 273         for (i = 0; i < 37; i++)
 274         {
 275                 arch_info[i] = armv4_5_core_reg_list_arch_info[i];
 276                 arch_info[i].target = target;
 277                 arch_info[i].armv4_5_common = armv4_5_common;
 278                 reg_list[i].name = armv4_5_core_reg_list[i];
 279                 reg_list[i].size = 32;
 280                 reg_list[i].value = calloc(1, 4);
 281                 reg_list[i].dirty = 0;
 282                 reg_list[i].valid = 0;
 283                 reg_list[i].bitfield_desc = NULL;
 284                 reg_list[i].num_bitfields = 0;
 285                 reg_list[i].arch_type = armv4_5_core_reg_arch_type;
 286                 reg_list[i].arch_info = &arch_info[i];
 287         }
 288
 289         return cache;
 290 }
 291
 292 int armv4_5_arch_state(struct target_s *target)
 293 {
 294         armv4_5_common_t *armv4_5 = target->arch_info;
 295
 296         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 297         {
 298                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 299                 exit(-1);
 300         }
 301
 302         LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8x pc: 0x%8.8x",
 303                          armv4_5_state_strings[armv4_5->core_state],
 304                          target_debug_reason_strings[target->debug_reason],
 305                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 306                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 307                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 308
 309         return ERROR_OK;
 310 }
 311
 312 int handle_armv4_5_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 313 {
 314         char output[128];
 315         int output_len;
 316         int mode, num;
 317         target_t *target = get_current_target(cmd_ctx);
 318         armv4_5_common_t *armv4_5 = target->arch_info;
 319
 320         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 321         {
 322                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 323                 return ERROR_OK;
 324         }
 325
 326         if (target->state != TARGET_HALTED)
 327         {
 328                 command_print(cmd_ctx, "error: target must be halted for register accesses");
 329                 return ERROR_OK;
 330         }
 331
 332         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 333                 return ERROR_FAIL;
 334
 335         for (num = 0; num <= 15; num++)
 336         {
 337                 output_len = 0;
 338                 for (mode = 0; mode < 6; mode++)
 339                 {
 340                         if (!ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).valid)
 341                         {
 342                                 armv4_5->full_context(target);
 343                         }
 344                         output_len += snprintf(output + output_len, 128 - output_len, "%8s: %8.8x ", ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name,
 345                                 buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32));
 346                 }
 347                 command_print(cmd_ctx, output);
 348         }
 349         command_print(cmd_ctx, "    cpsr: %8.8x spsr_fiq: %8.8x spsr_irq: %8.8x spsr_svc: %8.8x spsr_abt: %8.8x spsr_und: %8.8x",
 350                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 351                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32),
 352                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_IRQ].value, 0, 32),
 353                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_SVC].value, 0, 32),
 354                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_ABT].value, 0, 32),
 355                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_UND].value, 0, 32));
 356
 357         return ERROR_OK;
 358 }
 359
 360 int handle_armv4_5_core_state_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 361 {
 362         target_t *target = get_current_target(cmd_ctx);
 363         armv4_5_common_t *armv4_5 = target->arch_info;
 364
 365         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 366         {
 367                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 368                 return ERROR_OK;
 369         }
 370
 371         if (argc > 0)
 372         {
 373                 if (strcmp(args[0], "arm") == 0)
 374                 {
 375                         armv4_5->core_state = ARMV4_5_STATE_ARM;
 376                 }
 377                 if (strcmp(args[0], "thumb") == 0)
 378                 {
 379                         armv4_5->core_state = ARMV4_5_STATE_THUMB;
 380                 }
 381         }
 382
 383         command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
 384
 385         return ERROR_OK;
 386 }
 387
 388 int handle_armv4_5_disassemble_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 389 {
 390         target_t *target = get_current_target(cmd_ctx);
 391         armv4_5_common_t *armv4_5 = target->arch_info;
 392         u32 address;
 393         int count;
 394         int i;
 395         arm_instruction_t cur_instruction;
 396         u32 opcode;
 397         int thumb = 0;
 398
 399         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 400         {
 401                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 402                 return ERROR_OK;
 403         }
 404
 405         if (argc < 2)
 406         {
 407                 command_print(cmd_ctx, "usage: armv4_5 disassemble <address> <count> ['thumb']");
 408                 return ERROR_OK;
 409         }
 410
 411         address = strtoul(args[0], NULL, 0);
 412         count = strtoul(args[1], NULL, 0);
 413
 414         if (argc >= 3)
 415                 if (strcmp(args[2], "thumb") == 0)
 416                         thumb = 1;
 417
 418         for (i = 0; i < count; i++)
 419         {
 420                 target_read_u32(target, address, &opcode);
 421                 arm_evaluate_opcode(opcode, address, &cur_instruction);
 422                 command_print(cmd_ctx, "%s", cur_instruction.text);
 423                 address += (thumb) ? 2 : 4;
 424         }
 425
 426         return ERROR_OK;
 427 }
 428
 429 int armv4_5_register_commands(struct command_context_s *cmd_ctx)
 430 {
 431         command_t *armv4_5_cmd;
 432
 433         armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5", NULL, COMMAND_ANY, "armv4/5 specific commands");
 434
 435         register_command(cmd_ctx, armv4_5_cmd, "reg", handle_armv4_5_reg_command, COMMAND_EXEC, "display ARM core registers");
 436         register_command(cmd_ctx, armv4_5_cmd, "core_state", handle_armv4_5_core_state_command, COMMAND_EXEC, "display/change ARM core state <arm|thumb>");
 437
 438         register_command(cmd_ctx, armv4_5_cmd, "disassemble", handle_armv4_5_disassemble_command, COMMAND_EXEC, "disassemble instructions <address> <count> ['thumb']");
 439         return ERROR_OK;
 440 }
 441
 442 int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
 443 {
 444         armv4_5_common_t *armv4_5 = target->arch_info;
 445         int i;
 446
 447         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 448                 return ERROR_FAIL;
 449
 450         *reg_list_size = 26;
 451         *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
 452
 453         for (i = 0; i < 16; i++)
 454         {
 455                 (*reg_list)[i] = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i);
 456         }
 457
 458         for (i = 16; i < 24; i++)
 459         {
 460                 (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg;
 461         }
 462
 463         (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg;
 464         (*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR];
 465
 466         return ERROR_OK;
 467 }
 468
 469 int armv4_5_run_algorithm(struct target_s *target, int num_mem_params, mem_param_t *mem_params, int num_reg_params, reg_param_t *reg_params, u32 entry_point, u32 exit_point, int timeout_ms, void *arch_info)
 470 {
 471         armv4_5_common_t *armv4_5 = target->arch_info;
 472         armv4_5_algorithm_t *armv4_5_algorithm_info = arch_info;
 473         enum armv4_5_state core_state = armv4_5->core_state;
 474         enum armv4_5_mode core_mode = armv4_5->core_mode;
 475         u32 context[17];
 476         u32 cpsr;
 477         int exit_breakpoint_size = 0;
 478         int i;
 479         int retval = ERROR_OK;
 480         LOG_DEBUG("Running algorithm");
 481
 482         if (armv4_5_algorithm_info->common_magic != ARMV4_5_COMMON_MAGIC)
 483         {
 484                 LOG_ERROR("current target isn't an ARMV4/5 target");
 485                 return ERROR_TARGET_INVALID;
 486         }
 487
 488         if (target->state != TARGET_HALTED)
 489         {
 490                 LOG_WARNING("target not halted");
 491                 return ERROR_TARGET_NOT_HALTED;
 492         }
 493
 494         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 495                 return ERROR_FAIL;
 496
 497         for (i = 0; i <= 16; i++)
 498         {
 499                 if (!ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid)
 500                         armv4_5->read_core_reg(target, i, armv4_5_algorithm_info->core_mode);
 501                 context[i] = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32);
 502         }
 503         cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32);
 504
 505         for (i = 0; i < num_mem_params; i++)
 506         {
 507                 target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
 508         }
 509
 510         for (i = 0; i < num_reg_params; i++)
 511         {
 512                 reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
 513                 if (!reg)
 514                 {
 515                         LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 516                         exit(-1);
 517                 }
 518
 519                 if (reg->size != reg_params[i].size)
 520                 {
 521                         LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 522                         exit(-1);
 523                 }
 524
 525                 armv4_5_set_core_reg(reg, reg_params[i].value);
 526         }
 527
 528         armv4_5->core_state = armv4_5_algorithm_info->core_state;
 529         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
 530                 exit_breakpoint_size = 4;
 531         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
 532                 exit_breakpoint_size = 2;
 533         else
 534         {
 535                 LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
 536                 exit(-1);
 537         }
 538
 539         if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
 540         {
 541                 LOG_DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode);
 542                 buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 5, armv4_5_algorithm_info->core_mode);
 543                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 544                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 545         }
 546
 547         if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_HARD)) != ERROR_OK)
 548         {
 549                 LOG_ERROR("can't add breakpoint to finish algorithm execution");
 550                 return ERROR_TARGET_FAILURE;
 551         }
 552
 553         target_resume(target, 0, entry_point, 1, 1);
 554         target_poll(target);
 555
 556         while (target->state != TARGET_HALTED)
 557         {
 558                 usleep(10000);
 559                 target_poll(target);
 560                 if ((timeout_ms -= 10) <= 0)
 561                 {
 562                         LOG_ERROR("timeout waiting for algorithm to complete, trying to halt target");
 563                         target_halt(target);
 564                         timeout_ms = 1000;
 565                         while (target->state != TARGET_HALTED)
 566                         {
 567                                 usleep(10000);
 568                                 target_poll(target);
 569                                 if ((timeout_ms -= 10) <= 0)
 570                                 {
 571                                         LOG_ERROR("target didn't reenter debug state, exiting");
 572                                         exit(-1);
 573                                 }
 574                         }
 575                         retval = ERROR_TARGET_TIMEOUT;
 576                 }
 577         }
 578
 579         if ((retval != ERROR_TARGET_TIMEOUT) &&
 580                 (buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) != exit_point))
 581         {
 582                 LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4x",
 583                         buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 584         }
 585
 586         breakpoint_remove(target, exit_point);
 587
 588         for (i = 0; i < num_mem_params; i++)
 589         {
 590                 if (mem_params[i].direction != PARAM_OUT)
 591                         target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value);
 592         }
 593
 594         for (i = 0; i < num_reg_params; i++)
 595         {
 596                 if (reg_params[i].direction != PARAM_OUT)
 597                 {
 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                         buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
 613                 }
 614         }
 615
 616         for (i = 0; i <= 16; i++)
 617         {
 618                 LOG_DEBUG("restoring register %s with value 0x%8.8x", ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).name, context[i]);
 619                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32, context[i]);
 620                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid = 1;
 621                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1;
 622         }
 623         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
 624         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 625         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 626
 627         armv4_5->core_state = core_state;
 628         armv4_5->core_mode = core_mode;
 629
 630         return retval;
 631 }
 632
 633 int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5)
 634 {
 635         target->arch_info = armv4_5;
 636
 637         armv4_5->common_magic = ARMV4_5_COMMON_MAGIC;
 638         armv4_5->core_state = ARMV4_5_STATE_ARM;
 639         armv4_5->core_mode = ARMV4_5_MODE_USR;
 640
 641         return ERROR_OK;
 642 }