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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 "replacements.h"
  31
  32 #include "arm_disassembler.h"
  33
  34 #include "armv4_5.h"
  35
  36 #include "target.h"
  37 #include "register.h"
  38 #include "log.h"
  39 #include "binarybuffer.h"
  40 #include "command.h"
  41
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45
  46 bitfield_desc_t armv4_5_psr_bitfield_desc[] =
  47 {
  48         {"M[4:0]", 5},
  49         {"T", 1},
  50         {"F", 1},
  51         {"I", 1},
  52         {"reserved", 16},
  53         {"J", 1},
  54         {"reserved", 2},
  55         {"Q", 1},
  56         {"V", 1},
  57         {"C", 1},
  58         {"Z", 1},
  59         {"N", 1},
  60 };
  61
  62 char* armv4_5_core_reg_list[] =
  63 {
  64         "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11", "r12", "r13_usr", "lr_usr", "pc",
  65
  66         "r8_fiq", "r9_fiq", "r10_fiq", "r11_fiq", "r12_fiq", "r13_fiq", "lr_fiq",
  67
  68         "r13_irq", "lr_irq",
  69
  70         "r13_svc", "lr_svc",
  71
  72         "r13_abt", "lr_abt",
  73
  74         "r13_und", "lr_und",
  75
  76         "cpsr", "spsr_fiq", "spsr_irq", "spsr_svc", "spsr_abt", "spsr_und"
  77 };
  78
  79 char * armv4_5_mode_strings_list[] =
  80 {
  81         "Illegal mode value", "User", "FIQ", "IRQ", "Supervisor", "Abort", "Undefined", "System"
  82 };
  83
  84 /* Hack! Yuk! allow -1 index, which simplifies codepaths elsewhere in the code */
  85 char** armv4_5_mode_strings = armv4_5_mode_strings_list+1;
  86
  87 char* armv4_5_state_strings[] =
  88 {
  89         "ARM", "Thumb", "Jazelle"
  90 };
  91
  92 int armv4_5_core_reg_arch_type = -1;
  93
  94 armv4_5_core_reg_t armv4_5_core_reg_list_arch_info[] =
  95 {
  96         {0, ARMV4_5_MODE_ANY, NULL, NULL},
  97         {1, ARMV4_5_MODE_ANY, NULL, NULL},
  98         {2, ARMV4_5_MODE_ANY, NULL, NULL},
  99         {3, ARMV4_5_MODE_ANY, NULL, NULL},
 100         {4, ARMV4_5_MODE_ANY, NULL, NULL},
 101         {5, ARMV4_5_MODE_ANY, NULL, NULL},
 102         {6, ARMV4_5_MODE_ANY, NULL, NULL},
 103         {7, ARMV4_5_MODE_ANY, NULL, NULL},
 104         {8, ARMV4_5_MODE_ANY, NULL, NULL},
 105         {9, ARMV4_5_MODE_ANY, NULL, NULL},
 106         {10, ARMV4_5_MODE_ANY, NULL, NULL},
 107         {11, ARMV4_5_MODE_ANY, NULL, NULL},
 108         {12, ARMV4_5_MODE_ANY, NULL, NULL},
 109         {13, ARMV4_5_MODE_USR, NULL, NULL},
 110         {14, ARMV4_5_MODE_USR, NULL, NULL},
 111         {15, ARMV4_5_MODE_ANY, NULL, NULL},
 112
 113         {8, ARMV4_5_MODE_FIQ, NULL, NULL},
 114         {9, ARMV4_5_MODE_FIQ, NULL, NULL},
 115         {10, ARMV4_5_MODE_FIQ, NULL, NULL},
 116         {11, ARMV4_5_MODE_FIQ, NULL, NULL},
 117         {12, ARMV4_5_MODE_FIQ, NULL, NULL},
 118         {13, ARMV4_5_MODE_FIQ, NULL, NULL},
 119         {14, ARMV4_5_MODE_FIQ, NULL, NULL},
 120
 121         {13, ARMV4_5_MODE_IRQ, NULL, NULL},
 122         {14, ARMV4_5_MODE_IRQ, NULL, NULL},
 123
 124         {13, ARMV4_5_MODE_SVC, NULL, NULL},
 125         {14, ARMV4_5_MODE_SVC, NULL, NULL},
 126
 127         {13, ARMV4_5_MODE_ABT, NULL, NULL},
 128         {14, ARMV4_5_MODE_ABT, NULL, NULL},
 129
 130         {13, ARMV4_5_MODE_UND, NULL, NULL},
 131         {14, ARMV4_5_MODE_UND, NULL, NULL},
 132
 133         {16, ARMV4_5_MODE_ANY, NULL, NULL},
 134         {16, ARMV4_5_MODE_FIQ, NULL, NULL},
 135         {16, ARMV4_5_MODE_IRQ, NULL, NULL},
 136         {16, ARMV4_5_MODE_SVC, NULL, NULL},
 137         {16, ARMV4_5_MODE_ABT, NULL, NULL},
 138         {16, ARMV4_5_MODE_UND, NULL, NULL}
 139 };
 140
 141 /* map core mode (USR, FIQ, ...) and register number to indizes into the register cache */
 142 int armv4_5_core_reg_map[7][17] =
 143 {
 144         {       /* USR */
 145                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 146         },
 147         {       /* FIQ */
 148                 0, 1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21, 22, 15, 32
 149         },
 150         {       /* IRQ */
 151                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 23, 24, 15, 33
 152         },
 153         {       /* SVC */
 154                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 15, 34
 155         },
 156         {       /* ABT */
 157                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 27, 28, 15, 35
 158         },
 159         {       /* UND */
 160                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 29, 30, 15, 36
 161         },
 162         {       /* SYS */
 163                 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 31
 164         }
 165 };
 166
 167 u8 armv4_5_gdb_dummy_fp_value[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
 168
 169 reg_t armv4_5_gdb_dummy_fp_reg =
 170 {
 171         "GDB dummy floating-point register", armv4_5_gdb_dummy_fp_value, 0, 1, 96, NULL, 0, NULL, 0
 172 };
 173
 174 u8 armv4_5_gdb_dummy_fps_value[] = {0, 0, 0, 0};
 175
 176 reg_t armv4_5_gdb_dummy_fps_reg =
 177 {
 178         "GDB dummy floating-point status register", armv4_5_gdb_dummy_fps_value, 0, 1, 32, NULL, 0, NULL, 0
 179 };
 180
 181 int armv4_5_get_core_reg(reg_t *reg)
 182 {
 183         int retval;
 184         armv4_5_core_reg_t *armv4_5 = reg->arch_info;
 185         target_t *target = armv4_5->target;
 186
 187         if (target->state != TARGET_HALTED)
 188         {
 189                 LOG_ERROR("Target not halted");
 190                 return ERROR_TARGET_NOT_HALTED;
 191         }
 192
 193         /* retval = armv4_5->armv4_5_common->full_context(target); */
 194         retval = armv4_5->armv4_5_common->read_core_reg(target, armv4_5->num, armv4_5->mode);
 195
 196         return retval;
 197 }
 198
 199 int armv4_5_set_core_reg(reg_t *reg, u8 *buf)
 200 {
 201         armv4_5_core_reg_t *armv4_5 = reg->arch_info;
 202         target_t *target = armv4_5->target;
 203         armv4_5_common_t *armv4_5_target = target->arch_info;
 204         u32 value = buf_get_u32(buf, 0, 32);
 205
 206         if (target->state != TARGET_HALTED)
 207         {
 208                 return ERROR_TARGET_NOT_HALTED;
 209         }
 210
 211         if (reg == &armv4_5_target->core_cache->reg_list[ARMV4_5_CPSR])
 212         {
 213                 if (value & 0x20)
 214                 {
 215                         /* T bit should be set */
 216                         if (armv4_5_target->core_state == ARMV4_5_STATE_ARM)
 217                         {
 218                                 /* change state to Thumb */
 219                                 LOG_DEBUG("changing to Thumb state");
 220                                 armv4_5_target->core_state = ARMV4_5_STATE_THUMB;
 221                         }
 222                 }
 223                 else
 224                 {
 225                         /* T bit should be cleared */
 226                         if (armv4_5_target->core_state == ARMV4_5_STATE_THUMB)
 227                         {
 228                                 /* change state to ARM */
 229                                 LOG_DEBUG("changing to ARM state");
 230                                 armv4_5_target->core_state = ARMV4_5_STATE_ARM;
 231                         }
 232                 }
 233
 234                 if (armv4_5_target->core_mode != (value & 0x1f))
 235                 {
 236                         LOG_DEBUG("changing ARM core mode to '%s'", armv4_5_mode_strings[armv4_5_mode_to_number(value & 0x1f)]);
 237                         armv4_5_target->core_mode = value & 0x1f;
 238                         armv4_5_target->write_core_reg(target, 16, ARMV4_5_MODE_ANY, value);
 239                 }
 240         }
 241
 242         buf_set_u32(reg->value, 0, 32, value);
 243         reg->dirty = 1;
 244         reg->valid = 1;
 245
 246         return ERROR_OK;
 247 }
 248
 249 int armv4_5_invalidate_core_regs(target_t *target)
 250 {
 251         armv4_5_common_t *armv4_5 = target->arch_info;
 252         int i;
 253
 254         for (i = 0; i < 37; i++)
 255         {
 256                 armv4_5->core_cache->reg_list[i].valid = 0;
 257                 armv4_5->core_cache->reg_list[i].dirty = 0;
 258         }
 259
 260         return ERROR_OK;
 261 }
 262
 263 reg_cache_t* armv4_5_build_reg_cache(target_t *target, armv4_5_common_t *armv4_5_common)
 264 {
 265         int num_regs = 37;
 266         reg_cache_t *cache = malloc(sizeof(reg_cache_t));
 267         reg_t *reg_list = malloc(sizeof(reg_t) * num_regs);
 268         armv4_5_core_reg_t *arch_info = malloc(sizeof(armv4_5_core_reg_t) * num_regs);
 269         int i;
 270
 271         cache->name = "arm v4/5 registers";
 272         cache->next = NULL;
 273         cache->reg_list = reg_list;
 274         cache->num_regs = num_regs;
 275
 276         if (armv4_5_core_reg_arch_type == -1)
 277                 armv4_5_core_reg_arch_type = register_reg_arch_type(armv4_5_get_core_reg, armv4_5_set_core_reg);
 278
 279         register_init_dummy(&armv4_5_gdb_dummy_fp_reg);
 280         register_init_dummy(&armv4_5_gdb_dummy_fps_reg);
 281
 282         for (i = 0; i < 37; i++)
 283         {
 284                 arch_info[i] = armv4_5_core_reg_list_arch_info[i];
 285                 arch_info[i].target = target;
 286                 arch_info[i].armv4_5_common = armv4_5_common;
 287                 reg_list[i].name = armv4_5_core_reg_list[i];
 288                 reg_list[i].size = 32;
 289                 reg_list[i].value = calloc(1, 4);
 290                 reg_list[i].dirty = 0;
 291                 reg_list[i].valid = 0;
 292                 reg_list[i].bitfield_desc = NULL;
 293                 reg_list[i].num_bitfields = 0;
 294                 reg_list[i].arch_type = armv4_5_core_reg_arch_type;
 295                 reg_list[i].arch_info = &arch_info[i];
 296         }
 297
 298         return cache;
 299 }
 300
 301 int armv4_5_arch_state(struct target_s *target)
 302 {
 303         armv4_5_common_t *armv4_5 = target->arch_info;
 304
 305         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 306         {
 307                 LOG_ERROR("BUG: called for a non-ARMv4/5 target");
 308                 exit(-1);
 309         }
 310
 311         LOG_USER("target halted in %s state due to %s, current mode: %s\ncpsr: 0x%8.8x pc: 0x%8.8x",
 312                          armv4_5_state_strings[armv4_5->core_state],
 313                          Jim_Nvp_value2name_simple( nvp_target_debug_reason, target->debug_reason )->name,
 314                          armv4_5_mode_strings[armv4_5_mode_to_number(armv4_5->core_mode)],
 315                          buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 316                          buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 317
 318         return ERROR_OK;
 319 }
 320
 321 int handle_armv4_5_reg_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 322 {
 323         char output[128];
 324         int output_len;
 325         int mode, num;
 326         target_t *target = get_current_target(cmd_ctx);
 327         armv4_5_common_t *armv4_5 = target->arch_info;
 328
 329         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 330         {
 331                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 332                 return ERROR_OK;
 333         }
 334
 335         if (target->state != TARGET_HALTED)
 336         {
 337                 command_print(cmd_ctx, "error: target must be halted for register accesses");
 338                 return ERROR_OK;
 339         }
 340
 341         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 342                 return ERROR_FAIL;
 343
 344         for (num = 0; num <= 15; num++)
 345         {
 346                 output_len = 0;
 347                 for (mode = 0; mode < 6; mode++)
 348                 {
 349                         if (!ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).valid)
 350                         {
 351                                 armv4_5->full_context(target);
 352                         }
 353                         output_len += snprintf(output + output_len, 128 - output_len, "%8s: %8.8x ", ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).name,
 354                                 buf_get_u32(ARMV4_5_CORE_REG_MODENUM(armv4_5->core_cache, mode, num).value, 0, 32));
 355                 }
 356                 command_print(cmd_ctx, output);
 357         }
 358         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",
 359                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32),
 360                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_FIQ].value, 0, 32),
 361                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_IRQ].value, 0, 32),
 362                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_SVC].value, 0, 32),
 363                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_ABT].value, 0, 32),
 364                           buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_SPSR_UND].value, 0, 32));
 365
 366         return ERROR_OK;
 367 }
 368
 369 int handle_armv4_5_core_state_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 370 {
 371         target_t *target = get_current_target(cmd_ctx);
 372         armv4_5_common_t *armv4_5 = target->arch_info;
 373
 374         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 375         {
 376                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 377                 return ERROR_OK;
 378         }
 379
 380         if (argc > 0)
 381         {
 382                 if (strcmp(args[0], "arm") == 0)
 383                 {
 384                         armv4_5->core_state = ARMV4_5_STATE_ARM;
 385                 }
 386                 if (strcmp(args[0], "thumb") == 0)
 387                 {
 388                         armv4_5->core_state = ARMV4_5_STATE_THUMB;
 389                 }
 390         }
 391
 392         command_print(cmd_ctx, "core state: %s", armv4_5_state_strings[armv4_5->core_state]);
 393
 394         return ERROR_OK;
 395 }
 396
 397 int handle_armv4_5_disassemble_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 398 {
 399         int retval = ERROR_OK;
 400         target_t *target = get_current_target(cmd_ctx);
 401         armv4_5_common_t *armv4_5 = target->arch_info;
 402         u32 address;
 403         int count;
 404         int i;
 405         arm_instruction_t cur_instruction;
 406         u32 opcode;
 407         int thumb = 0;
 408
 409         if (armv4_5->common_magic != ARMV4_5_COMMON_MAGIC)
 410         {
 411                 command_print(cmd_ctx, "current target isn't an ARMV4/5 target");
 412                 return ERROR_OK;
 413         }
 414
 415         if (argc < 2)
 416         {
 417                 command_print(cmd_ctx, "usage: armv4_5 disassemble <address> <count> ['thumb']");
 418                 return ERROR_OK;
 419         }
 420
 421         address = strtoul(args[0], NULL, 0);
 422         count = strtoul(args[1], NULL, 0);
 423
 424         if (argc >= 3)
 425                 if (strcmp(args[2], "thumb") == 0)
 426                         thumb = 1;
 427
 428         for (i = 0; i < count; i++)
 429         {
 430                 if((retval = target_read_u32(target, address, &opcode)) != ERROR_OK)
 431                 {
 432                         return retval;
 433                 }
 434                 if((retval = arm_evaluate_opcode(opcode, address, &cur_instruction)) != ERROR_OK)
 435                 {
 436                         return retval;
 437                 }
 438                 command_print(cmd_ctx, "%s", cur_instruction.text);
 439                 address += (thumb) ? 2 : 4;
 440         }
 441
 442         return ERROR_OK;
 443 }
 444
 445 int armv4_5_register_commands(struct command_context_s *cmd_ctx)
 446 {
 447         command_t *armv4_5_cmd;
 448
 449         armv4_5_cmd = register_command(cmd_ctx, NULL, "armv4_5", NULL, COMMAND_ANY, "armv4/5 specific commands");
 450
 451         register_command(cmd_ctx, armv4_5_cmd, "reg", handle_armv4_5_reg_command, COMMAND_EXEC, "display ARM core registers");
 452         register_command(cmd_ctx, armv4_5_cmd, "core_state", handle_armv4_5_core_state_command, COMMAND_EXEC, "display/change ARM core state <arm|thumb>");
 453
 454         register_command(cmd_ctx, armv4_5_cmd, "disassemble", handle_armv4_5_disassemble_command, COMMAND_EXEC, "disassemble instructions <address> <count> ['thumb']");
 455         return ERROR_OK;
 456 }
 457
 458 int armv4_5_get_gdb_reg_list(target_t *target, reg_t **reg_list[], int *reg_list_size)
 459 {
 460         armv4_5_common_t *armv4_5 = target->arch_info;
 461         int i;
 462
 463         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 464                 return ERROR_FAIL;
 465
 466         *reg_list_size = 26;
 467         *reg_list = malloc(sizeof(reg_t*) * (*reg_list_size));
 468
 469         for (i = 0; i < 16; i++)
 470         {
 471                 (*reg_list)[i] = &ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5->core_mode, i);
 472         }
 473
 474         for (i = 16; i < 24; i++)
 475         {
 476                 (*reg_list)[i] = &armv4_5_gdb_dummy_fp_reg;
 477         }
 478
 479         (*reg_list)[24] = &armv4_5_gdb_dummy_fps_reg;
 480         (*reg_list)[25] = &armv4_5->core_cache->reg_list[ARMV4_5_CPSR];
 481
 482         return ERROR_OK;
 483 }
 484
 485 /* wait for execution to complete and check exit point */
 486 static int armv4_5_run_algorithm_completion(struct target_s *target, u32 exit_point, int timeout_ms, void *arch_info)
 487 {
 488         int retval;
 489         armv4_5_common_t *armv4_5 = target->arch_info;
 490
 491         if((retval = target_wait_state(target, TARGET_HALTED, timeout_ms)) != ERROR_OK)
 492         {
 493                 return retval;
 494         }
 495         if (target->state != TARGET_HALTED)
 496         {
 497                 if ((retval=target_halt(target))!=ERROR_OK)
 498                         return retval;
 499                 if ((retval=target_wait_state(target, TARGET_HALTED, 500))!=ERROR_OK)
 500                 {
 501                         return retval;
 502                 }
 503                 return ERROR_TARGET_TIMEOUT;
 504         }
 505         if (buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32) != exit_point)
 506         {
 507                 LOG_WARNING("target reentered debug state, but not at the desired exit point: 0x%4.4x",
 508                         buf_get_u32(armv4_5->core_cache->reg_list[15].value, 0, 32));
 509                 return ERROR_TARGET_TIMEOUT;
 510         }
 511
 512         return ERROR_OK;
 513 }
 514
 515 int armv4_5_run_algorithm_inner(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, int (*run_it)(struct target_s *target, u32 exit_point, int timeout_ms, void *arch_info))
 516 {
 517         armv4_5_common_t *armv4_5 = target->arch_info;
 518         armv4_5_algorithm_t *armv4_5_algorithm_info = arch_info;
 519         enum armv4_5_state core_state = armv4_5->core_state;
 520         enum armv4_5_mode core_mode = armv4_5->core_mode;
 521         u32 context[17];
 522         u32 cpsr;
 523         int exit_breakpoint_size = 0;
 524         int i;
 525         int retval = ERROR_OK;
 526         LOG_DEBUG("Running algorithm");
 527
 528         if (armv4_5_algorithm_info->common_magic != ARMV4_5_COMMON_MAGIC)
 529         {
 530                 LOG_ERROR("current target isn't an ARMV4/5 target");
 531                 return ERROR_TARGET_INVALID;
 532         }
 533
 534         if (target->state != TARGET_HALTED)
 535         {
 536                 LOG_WARNING("target not halted");
 537                 return ERROR_TARGET_NOT_HALTED;
 538         }
 539
 540         if (armv4_5_mode_to_number(armv4_5->core_mode)==-1)
 541                 return ERROR_FAIL;
 542
 543         for (i = 0; i <= 16; i++)
 544         {
 545                 if (!ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid)
 546                         armv4_5->read_core_reg(target, i, armv4_5_algorithm_info->core_mode);
 547                 context[i] = buf_get_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32);
 548         }
 549         cpsr = buf_get_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32);
 550
 551         for (i = 0; i < num_mem_params; i++)
 552         {
 553                 if((retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
 554                 {
 555                         return retval;
 556                 }
 557         }
 558
 559         for (i = 0; i < num_reg_params; i++)
 560         {
 561                 reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
 562                 if (!reg)
 563                 {
 564                         LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 565                         exit(-1);
 566                 }
 567
 568                 if (reg->size != reg_params[i].size)
 569                 {
 570                         LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 571                         exit(-1);
 572                 }
 573
 574                 if((retval = armv4_5_set_core_reg(reg, reg_params[i].value)) != ERROR_OK)
 575                 {
 576                         return retval;
 577                 }
 578         }
 579
 580         armv4_5->core_state = armv4_5_algorithm_info->core_state;
 581         if (armv4_5->core_state == ARMV4_5_STATE_ARM)
 582                 exit_breakpoint_size = 4;
 583         else if (armv4_5->core_state == ARMV4_5_STATE_THUMB)
 584                 exit_breakpoint_size = 2;
 585         else
 586         {
 587                 LOG_ERROR("BUG: can't execute algorithms when not in ARM or Thumb state");
 588                 exit(-1);
 589         }
 590
 591         if (armv4_5_algorithm_info->core_mode != ARMV4_5_MODE_ANY)
 592         {
 593                 LOG_DEBUG("setting core_mode: 0x%2.2x", armv4_5_algorithm_info->core_mode);
 594                 buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 5, armv4_5_algorithm_info->core_mode);
 595                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 596                 armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 597         }
 598
 599         if ((retval = breakpoint_add(target, exit_point, exit_breakpoint_size, BKPT_HARD)) != ERROR_OK)
 600         {
 601                 LOG_ERROR("can't add breakpoint to finish algorithm execution");
 602                 return ERROR_TARGET_FAILURE;
 603         }
 604
 605         if((retval = target_resume(target, 0, entry_point, 1, 1)) != ERROR_OK)
 606         {
 607                 return retval;
 608         }
 609         int retvaltemp;
 610         retval=run_it(target, exit_point, timeout_ms, arch_info);
 611
 612         breakpoint_remove(target, exit_point);
 613
 614         if (retval!=ERROR_OK)
 615                 return retval;
 616
 617         for (i = 0; i < num_mem_params; i++)
 618         {
 619                 if (mem_params[i].direction != PARAM_OUT)
 620                         if((retvaltemp = target_read_buffer(target, mem_params[i].address, mem_params[i].size, mem_params[i].value)) != ERROR_OK)
 621                         {
 622                                         retval = retvaltemp;
 623                         }
 624         }
 625
 626         for (i = 0; i < num_reg_params; i++)
 627         {
 628                 if (reg_params[i].direction != PARAM_OUT)
 629                 {
 630
 631                         reg_t *reg = register_get_by_name(armv4_5->core_cache, reg_params[i].reg_name, 0);
 632                         if (!reg)
 633                         {
 634                                 LOG_ERROR("BUG: register '%s' not found", reg_params[i].reg_name);
 635                                 exit(-1);
 636                         }
 637
 638                         if (reg->size != reg_params[i].size)
 639                         {
 640                                 LOG_ERROR("BUG: register '%s' size doesn't match reg_params[i].size", reg_params[i].reg_name);
 641                                 exit(-1);
 642                         }
 643
 644                         buf_set_u32(reg_params[i].value, 0, 32, buf_get_u32(reg->value, 0, 32));
 645                 }
 646         }
 647
 648         for (i = 0; i <= 16; i++)
 649         {
 650                 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]);
 651                 buf_set_u32(ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).value, 0, 32, context[i]);
 652                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).valid = 1;
 653                 ARMV4_5_CORE_REG_MODE(armv4_5->core_cache, armv4_5_algorithm_info->core_mode, i).dirty = 1;
 654         }
 655         buf_set_u32(armv4_5->core_cache->reg_list[ARMV4_5_CPSR].value, 0, 32, cpsr);
 656         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].valid = 1;
 657         armv4_5->core_cache->reg_list[ARMV4_5_CPSR].dirty = 1;
 658
 659         armv4_5->core_state = core_state;
 660         armv4_5->core_mode = core_mode;
 661
 662         return retval;
 663 }
 664
 665 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)
 666 {
 667         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);
 668 }
 669
 670 int armv4_5_init_arch_info(target_t *target, armv4_5_common_t *armv4_5)
 671 {
 672         target->arch_info = armv4_5;
 673
 674         armv4_5->common_magic = ARMV4_5_COMMON_MAGIC;
 675         armv4_5->core_state = ARMV4_5_STATE_ARM;
 676         armv4_5->core_mode = ARMV4_5_MODE_USR;
 677
 678         return ERROR_OK;
 679 }