monitor.c

   1 /*
   2  * QEMU monitor
   3  *
   4  * Copyright (c) 2003-2004 Fabrice Bellard
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22  * THE SOFTWARE.
  23  */
  24 #include "vl.h"
  25 #include "disas.h"
  26
  27 //#define DEBUG
  28
  29 #ifndef offsetof
  30 #define offsetof(type, field) ((size_t) &((type *)0)->field)
  31 #endif
  32
  33 #define TERM_CMD_BUF_SIZE 4095
  34 #define TERM_MAX_CMDS 64
  35
  36 #define IS_NORM 0
  37 #define IS_ESC  1
  38 #define IS_CSI  2
  39
  40 #define printf do_not_use_printf
  41
  42 static char term_cmd_buf[TERM_CMD_BUF_SIZE + 1];
  43 static int term_cmd_buf_index;
  44 static int term_cmd_buf_size;
  45 static int term_esc_state;
  46 static int term_esc_param;
  47
  48 static char *term_history[TERM_MAX_CMDS];
  49 static int term_hist_entry;
  50
  51 /*
  52  * Supported types:
  53  *
  54  * 'F'          filename
  55  * 's'          string (accept optional quote)
  56  * 'i'          integer
  57  * '/'          optional gdb-like print format (like "/10x")
  58  *
  59  * '?'          optional type (for 'F', 's' and 'i')
  60  *
  61  */
  62
  63 typedef struct term_cmd_t {
  64     const char *name;
  65     const char *args_type;
  66     void (*handler)();
  67     const char *params;
  68     const char *help;
  69 } term_cmd_t;
  70
  71 static term_cmd_t term_cmds[];
  72 static term_cmd_t info_cmds[];
  73
  74 void term_printf(const char *fmt, ...)
  75 {
  76     va_list ap;
  77     va_start(ap, fmt);
  78     vprintf(fmt, ap);
  79     va_end(ap);
  80 }
  81
  82 void term_flush(void)
  83 {
  84     fflush(stdout);
  85 }
  86
  87 static int compare_cmd(const char *name, const char *list)
  88 {
  89     const char *p, *pstart;
  90     int len;
  91     len = strlen(name);
  92     p = list;
  93     for(;;) {
  94         pstart = p;
  95         p = strchr(p, '|');
  96         if (!p)
  97             p = pstart + strlen(pstart);
  98         if ((p - pstart) == len && !memcmp(pstart, name, len))
  99             return 1;
 100         if (*p == '\0')
 101             break;
 102         p++;
 103     }
 104     return 0;
 105 }
 106
 107 static void help_cmd1(term_cmd_t *cmds, const char *prefix, const char *name)
 108 {
 109     term_cmd_t *cmd;
 110
 111     for(cmd = cmds; cmd->name != NULL; cmd++) {
 112         if (!name || !strcmp(name, cmd->name))
 113             term_printf("%s%s %s -- %s\n", prefix, cmd->name, cmd->params, cmd->help);
 114     }
 115 }
 116
 117 static void help_cmd(const char *name)
 118 {
 119     if (name && !strcmp(name, "info")) {
 120         help_cmd1(info_cmds, "info ", NULL);
 121     } else {
 122         help_cmd1(term_cmds, "", name);
 123         if (name && !strcmp(name, "log")) {
 124             CPULogItem *item;
 125             term_printf("Log items (comma separated):\n");
 126             term_printf("%-10s %s\n", "none", "remove all logs");
 127             for(item = cpu_log_items; item->mask != 0; item++) {
 128                 term_printf("%-10s %s\n", item->name, item->help);
 129             }
 130         }
 131     }
 132 }
 133
 134 static void do_help(const char *name)
 135 {
 136     help_cmd(name);
 137 }
 138
 139 static void do_commit(void)
 140 {
 141     int i;
 142
 143     for (i = 0; i < MAX_DISKS; i++) {
 144         if (bs_table[i])
 145             bdrv_commit(bs_table[i]);
 146     }
 147 }
 148
 149 static void do_info(const char *item)
 150 {
 151     term_cmd_t *cmd;
 152
 153     if (!item)
 154         goto help;
 155     for(cmd = info_cmds; cmd->name != NULL; cmd++) {
 156         if (compare_cmd(item, cmd->name))
 157             goto found;
 158     }
 159  help:
 160     help_cmd("info");
 161     return;
 162  found:
 163     cmd->handler();
 164 }
 165
 166 static void do_info_network(void)
 167 {
 168     int i, j;
 169     NetDriverState *nd;
 170
 171     for(i = 0; i < nb_nics; i++) {
 172         nd = &nd_table[i];
 173         term_printf("%d: ifname=%s macaddr=", i, nd->ifname);
 174         for(j = 0; j < 6; j++) {
 175             if (j > 0)
 176                 term_printf(":");
 177             term_printf("%02x", nd->macaddr[j]);
 178         }
 179         term_printf("\n");
 180     }
 181 }
 182
 183 static void do_info_block(void)
 184 {
 185     bdrv_info();
 186 }
 187
 188 static void do_info_registers(void)
 189 {
 190 #ifdef TARGET_I386
 191     cpu_dump_state(cpu_single_env, stdout, X86_DUMP_FPU | X86_DUMP_CCOP);
 192 #else
 193     cpu_dump_state(cpu_single_env, stdout, 0);
 194 #endif
 195 }
 196
 197 static void do_info_history (void)
 198 {
 199     int i;
 200
 201     for (i = 0; i < TERM_MAX_CMDS; i++) {
 202         if (term_history[i] == NULL)
 203             break;
 204         term_printf("%d: '%s'\n", i, term_history[i]);
 205     }
 206 }
 207
 208 static void do_quit(void)
 209 {
 210     exit(0);
 211 }
 212
 213 static int eject_device(BlockDriverState *bs, int force)
 214 {
 215     if (bdrv_is_inserted(bs)) {
 216         if (!force) {
 217             if (!bdrv_is_removable(bs)) {
 218                 term_printf("device is not removable\n");
 219                 return -1;
 220             }
 221             if (bdrv_is_locked(bs)) {
 222                 term_printf("device is locked\n");
 223                 return -1;
 224             }
 225         }
 226         bdrv_close(bs);
 227     }
 228     return 0;
 229 }
 230
 231 static void do_eject(int force, const char *filename)
 232 {
 233     BlockDriverState *bs;
 234
 235     term_printf("%d %s\n", force, filename);
 236
 237     bs = bdrv_find(filename);
 238     if (!bs) {
 239         term_printf("device not found\n");
 240         return;
 241     }
 242     eject_device(bs, force);
 243 }
 244
 245 static void do_change(const char *device, const char *filename)
 246 {
 247     BlockDriverState *bs;
 248
 249     bs = bdrv_find(device);
 250     if (!bs) {
 251         term_printf("device not found\n");
 252         return;
 253     }
 254     if (eject_device(bs, 0) < 0)
 255         return;
 256     bdrv_open(bs, filename, 0);
 257 }
 258
 259 static void do_screen_dump(const char *filename)
 260 {
 261     vga_screen_dump(filename);
 262 }
 263
 264 static void do_log(const char *items)
 265 {
 266     int mask;
 267
 268     if (!strcmp(items, "none")) {
 269         mask = 0;
 270     } else {
 271         mask = cpu_str_to_log_mask(items);
 272         if (!mask) {
 273             help_cmd("log");
 274             return;
 275         }
 276     }
 277     cpu_set_log(mask);
 278 }
 279
 280 static void do_savevm(const char *filename)
 281 {
 282     if (qemu_savevm(filename) < 0)
 283         term_printf("I/O error when saving VM to '%s'\n", filename);
 284 }
 285
 286 static void do_loadvm(const char *filename)
 287 {
 288     if (qemu_loadvm(filename) < 0)
 289         term_printf("I/O error when loading VM from '%s'\n", filename);
 290 }
 291
 292 static void do_stop(void)
 293 {
 294     vm_stop(EXCP_INTERRUPT);
 295 }
 296
 297 static void do_cont(void)
 298 {
 299     vm_start();
 300 }
 301
 302 #ifdef CONFIG_GDBSTUB
 303 static void do_gdbserver(int has_port, int port)
 304 {
 305     if (!has_port)
 306         port = DEFAULT_GDBSTUB_PORT;
 307     if (gdbserver_start(port) < 0) {
 308         qemu_printf("Could not open gdbserver socket on port %d\n", port);
 309     } else {
 310         qemu_printf("Waiting gdb connection on port %d\n", port);
 311     }
 312 }
 313 #endif
 314
 315 static void term_printc(int c)
 316 {
 317     term_printf("'");
 318     switch(c) {
 319     case '\'':
 320         term_printf("\\'");
 321         break;
 322     case '\\':
 323         term_printf("\\\\");
 324         break;
 325     case '\n':
 326         term_printf("\\n");
 327         break;
 328     case '\r':
 329         term_printf("\\r");
 330         break;
 331     default:
 332         if (c >= 32 && c <= 126) {
 333             term_printf("%c", c);
 334         } else {
 335             term_printf("\\x%02x", c);
 336         }
 337         break;
 338     }
 339     term_printf("'");
 340 }
 341
 342 static void memory_dump(int count, int format, int wsize,
 343                         target_ulong addr, int is_physical)
 344 {
 345     int nb_per_line, l, line_size, i, max_digits, len;
 346     uint8_t buf[16];
 347     uint64_t v;
 348
 349     if (format == 'i') {
 350         int flags;
 351         flags = 0;
 352 #ifdef TARGET_I386
 353         if (wsize == 2) {
 354             flags = 1;
 355         } else if (wsize == 4) {
 356             flags = 0;
 357         } else {
 358             /* as default we use the current CS size */
 359             flags = 0;
 360             if (!(cpu_single_env->segs[R_CS].flags & DESC_B_MASK))
 361                 flags = 1;
 362         }
 363 #endif
 364         monitor_disas(addr, count, is_physical, flags);
 365         return;
 366     }
 367
 368     len = wsize * count;
 369     if (wsize == 1)
 370         line_size = 8;
 371     else
 372         line_size = 16;
 373     nb_per_line = line_size / wsize;
 374     max_digits = 0;
 375
 376     switch(format) {
 377     case 'o':
 378         max_digits = (wsize * 8 + 2) / 3;
 379         break;
 380     default:
 381     case 'x':
 382         max_digits = (wsize * 8) / 4;
 383         break;
 384     case 'u':
 385     case 'd':
 386         max_digits = (wsize * 8 * 10 + 32) / 33;
 387         break;
 388     case 'c':
 389         wsize = 1;
 390         break;
 391     }
 392
 393     while (len > 0) {
 394         term_printf("0x%08x:", addr);
 395         l = len;
 396         if (l > line_size)
 397             l = line_size;
 398         if (is_physical) {
 399             cpu_physical_memory_rw(addr, buf, l, 0);
 400         } else {
 401             cpu_memory_rw_debug(cpu_single_env, addr, buf, l, 0);
 402         }
 403         i = 0;
 404         while (i < l) {
 405             switch(wsize) {
 406             default:
 407             case 1:
 408                 v = ldub_raw(buf + i);
 409                 break;
 410             case 2:
 411                 v = lduw_raw(buf + i);
 412                 break;
 413             case 4:
 414                 v = ldl_raw(buf + i);
 415                 break;
 416             case 8:
 417                 v = ldq_raw(buf + i);
 418                 break;
 419             }
 420             term_printf(" ");
 421             switch(format) {
 422             case 'o':
 423                 term_printf("%#*llo", max_digits, v);
 424                 break;
 425             case 'x':
 426                 term_printf("0x%0*llx", max_digits, v);
 427                 break;
 428             case 'u':
 429                 term_printf("%*llu", max_digits, v);
 430                 break;
 431             case 'd':
 432                 term_printf("%*lld", max_digits, v);
 433                 break;
 434             case 'c':
 435                 term_printc(v);
 436                 break;
 437             }
 438             i += wsize;
 439         }
 440         term_printf("\n");
 441         addr += l;
 442         len -= l;
 443     }
 444 }
 445
 446 static void do_memory_dump(int count, int format, int size, int addr)
 447 {
 448     memory_dump(count, format, size, addr, 0);
 449 }
 450
 451 static void do_physical_memory_dump(int count, int format, int size, int addr)
 452 {
 453     memory_dump(count, format, size, addr, 1);
 454 }
 455
 456 static void do_print(int count, int format, int size, int val)
 457 {
 458     switch(format) {
 459     case 'o':
 460         term_printf("%#o", val);
 461         break;
 462     case 'x':
 463         term_printf("%#x", val);
 464         break;
 465     case 'u':
 466         term_printf("%u", val);
 467         break;
 468     default:
 469     case 'd':
 470         term_printf("%d", val);
 471         break;
 472     case 'c':
 473         term_printc(val);
 474         break;
 475     }
 476     term_printf("\n");
 477 }
 478
 479 typedef struct {
 480     int keycode;
 481     const char *name;
 482 } KeyDef;
 483
 484 static const KeyDef key_defs[] = {
 485     { 0x2a, "shift" },
 486     { 0x36, "shift_r" },
 487
 488     { 0x38, "alt" },
 489     { 0xb8, "alt_r" },
 490     { 0x1d, "ctrl" },
 491     { 0x9d, "ctrl_r" },
 492
 493     { 0xdd, "menu" },
 494
 495     { 0x01, "esc" },
 496
 497     { 0x02, "1" },
 498     { 0x03, "2" },
 499     { 0x04, "3" },
 500     { 0x05, "4" },
 501     { 0x06, "5" },
 502     { 0x07, "6" },
 503     { 0x08, "7" },
 504     { 0x09, "8" },
 505     { 0x0a, "9" },
 506     { 0x0b, "0" },
 507     { 0x0e, "backspace" },
 508
 509     { 0x0f, "tab" },
 510     { 0x10, "q" },
 511     { 0x11, "w" },
 512     { 0x12, "e" },
 513     { 0x13, "r" },
 514     { 0x14, "t" },
 515     { 0x15, "y" },
 516     { 0x16, "u" },
 517     { 0x17, "i" },
 518     { 0x18, "o" },
 519     { 0x19, "p" },
 520
 521     { 0x1c, "ret" },
 522
 523     { 0x1e, "a" },
 524     { 0x1f, "s" },
 525     { 0x20, "d" },
 526     { 0x21, "f" },
 527     { 0x22, "g" },
 528     { 0x23, "h" },
 529     { 0x24, "j" },
 530     { 0x25, "k" },
 531     { 0x26, "l" },
 532
 533     { 0x2c, "z" },
 534     { 0x2d, "x" },
 535     { 0x2e, "c" },
 536     { 0x2f, "v" },
 537     { 0x30, "b" },
 538     { 0x31, "n" },
 539     { 0x32, "m" },
 540
 541     { 0x39, "spc" },
 542     { 0x3a, "caps_lock" },
 543     { 0x3b, "f1" },
 544     { 0x3c, "f2" },
 545     { 0x3d, "f3" },
 546     { 0x3e, "f4" },
 547     { 0x3f, "f5" },
 548     { 0x40, "f6" },
 549     { 0x41, "f7" },
 550     { 0x42, "f8" },
 551     { 0x43, "f9" },
 552     { 0x44, "f10" },
 553     { 0x45, "num_lock" },
 554     { 0x46, "scroll_lock" },
 555
 556     { 0x56, "<" },
 557
 558     { 0x57, "f11" },
 559     { 0x58, "f12" },
 560
 561     { 0xb7, "print" },
 562
 563     { 0xc7, "home" },
 564     { 0xc9, "pgup" },
 565     { 0xd1, "pgdn" },
 566     { 0xcf, "end" },
 567
 568     { 0xcb, "left" },
 569     { 0xc8, "up" },
 570     { 0xd0, "down" },
 571     { 0xcd, "right" },
 572
 573     { 0xd2, "insert" },
 574     { 0xd3, "delete" },
 575     { 0, NULL },
 576 };
 577
 578 static int get_keycode(const char *key)
 579 {
 580     const KeyDef *p;
 581
 582     for(p = key_defs; p->name != NULL; p++) {
 583         if (!strcmp(key, p->name))
 584             return p->keycode;
 585     }
 586     return -1;
 587 }
 588
 589 static void do_send_key(const char *string)
 590 {
 591     char keybuf[16], *q;
 592     uint8_t keycodes[16];
 593     const char *p;
 594     int nb_keycodes, keycode, i;
 595
 596     nb_keycodes = 0;
 597     p = string;
 598     while (*p != '\0') {
 599         q = keybuf;
 600         while (*p != '\0' && *p != '-') {
 601             if ((q - keybuf) < sizeof(keybuf) - 1) {
 602                 *q++ = *p;
 603             }
 604             p++;
 605         }
 606         *q = '\0';
 607         keycode = get_keycode(keybuf);
 608         if (keycode < 0) {
 609             term_printf("unknown key: '%s'\n", keybuf);
 610             return;
 611         }
 612         keycodes[nb_keycodes++] = keycode;
 613         if (*p == '\0')
 614             break;
 615         p++;
 616     }
 617     /* key down events */
 618     for(i = 0; i < nb_keycodes; i++) {
 619         keycode = keycodes[i];
 620         if (keycode & 0x80)
 621             kbd_put_keycode(0xe0);
 622         kbd_put_keycode(keycode & 0x7f);
 623     }
 624     /* key up events */
 625     for(i = nb_keycodes - 1; i >= 0; i--) {
 626         keycode = keycodes[i];
 627         if (keycode & 0x80)
 628             kbd_put_keycode(0xe0);
 629         kbd_put_keycode(keycode | 0x80);
 630     }
 631 }
 632
 633 static void do_ioport_read(int count, int format, int size, int addr, int has_index, int index)
 634 {
 635     uint32_t val;
 636     int suffix;
 637
 638     if (has_index) {
 639         cpu_outb(NULL, addr & 0xffff, index & 0xff);
 640         addr++;
 641     }
 642     addr &= 0xffff;
 643
 644     switch(size) {
 645     default:
 646     case 1:
 647         val = cpu_inb(NULL, addr);
 648         suffix = 'b';
 649         break;
 650     case 2:
 651         val = cpu_inw(NULL, addr);
 652         suffix = 'w';
 653         break;
 654     case 4:
 655         val = cpu_inl(NULL, addr);
 656         suffix = 'l';
 657         break;
 658     }
 659     term_printf("port%c[0x%04x] = %#0*x\n",
 660                 suffix, addr, size * 2, val);
 661 }
 662
 663 static term_cmd_t term_cmds[] = {
 664     { "help|?", "s?", do_help,
 665       "[cmd]", "show the help" },
 666     { "commit", "", do_commit,
 667       "", "commit changes to the disk images (if -snapshot is used)" },
 668     { "info", "s?", do_info,
 669       "subcommand", "show various information about the system state" },
 670     { "q|quit", "", do_quit,
 671       "", "quit the emulator" },
 672     { "eject", "-fs", do_eject,
 673       "[-f] device", "eject a removable media (use -f to force it)" },
 674     { "change", "sF", do_change,
 675       "device filename", "change a removable media" },
 676     { "screendump", "F", do_screen_dump,
 677       "filename", "save screen into PPM image 'filename'" },
 678     { "log", "s", do_log,
 679       "item1[,...]", "activate logging of the specified items to '/tmp/qemu.log'" },
 680     { "savevm", "F", do_savevm,
 681       "filename", "save the whole virtual machine state to 'filename'" },
 682     { "loadvm", "F", do_loadvm,
 683       "filename", "restore the whole virtual machine state from 'filename'" },
 684     { "stop", "", do_stop,
 685       "", "stop emulation", },
 686     { "c|cont", "", do_cont,
 687       "", "resume emulation", },
 688 #ifdef CONFIG_GDBSTUB
 689     { "gdbserver", "i?", do_gdbserver,
 690       "[port]", "start gdbserver session (default port=1234)", },
 691 #endif
 692     { "x", "/i", do_memory_dump,
 693       "/fmt addr", "virtual memory dump starting at 'addr'", },
 694     { "xp", "/i", do_physical_memory_dump,
 695       "/fmt addr", "physical memory dump starting at 'addr'", },
 696     { "p|print", "/i", do_print,
 697       "/fmt expr", "print expression value (use $reg for CPU register access)", },
 698     { "i", "/ii.", do_ioport_read,
 699       "/fmt addr", "I/O port read" },
 700
 701     { "sendkey", "s", do_send_key,
 702       "keys", "send keys to the VM (e.g. 'sendkey ctrl-alt-f1')" },
 703     { NULL, NULL, },
 704 };
 705
 706 static term_cmd_t info_cmds[] = {
 707     { "network", "", do_info_network,
 708       "", "show the network state" },
 709     { "block", "", do_info_block,
 710       "", "show the block devices" },
 711     { "registers", "", do_info_registers,
 712       "", "show the cpu registers" },
 713     { "history", "", do_info_history,
 714       "", "show the command line history", },
 715     { "irq", "", irq_info,
 716       "", "show the interrupts statistics (if available)", },
 717     { "pic", "", pic_info,
 718       "", "show i8259 (PIC) state", },
 719     { "pci", "", pci_info,
 720       "", "show PCI info", },
 721     { NULL, NULL, },
 722 };
 723
 724 /*******************************************************************/
 725
 726 static const char *pch;
 727 static jmp_buf expr_env;
 728
 729 typedef struct MonitorDef {
 730     const char *name;
 731     int offset;
 732     int (*get_value)(struct MonitorDef *md);
 733 } MonitorDef;
 734
 735 #if defined(TARGET_I386)
 736 static int monitor_get_pc (struct MonitorDef *md)
 737 {
 738     return cpu_single_env->eip + (long)cpu_single_env->segs[R_CS].base;
 739 }
 740 #endif
 741
 742 #if defined(TARGET_PPC)
 743 static int monitor_get_ccr (struct MonitorDef *md)
 744 {
 745     unsigned int u;
 746     int i;
 747
 748     u = 0;
 749     for (i = 0; i < 8; i++)
 750         u |= cpu_single_env->crf[i] << (32 - (4 * i));
 751
 752     return u;
 753 }
 754
 755 static int monitor_get_msr (struct MonitorDef *md)
 756 {
 757     return (cpu_single_env->msr[MSR_POW] << MSR_POW) |
 758         (cpu_single_env->msr[MSR_ILE] << MSR_ILE) |
 759         (cpu_single_env->msr[MSR_EE] << MSR_EE) |
 760         (cpu_single_env->msr[MSR_PR] << MSR_PR) |
 761         (cpu_single_env->msr[MSR_FP] << MSR_FP) |
 762         (cpu_single_env->msr[MSR_ME] << MSR_ME) |
 763         (cpu_single_env->msr[MSR_FE0] << MSR_FE0) |
 764         (cpu_single_env->msr[MSR_SE] << MSR_SE) |
 765         (cpu_single_env->msr[MSR_BE] << MSR_BE) |
 766         (cpu_single_env->msr[MSR_FE1] << MSR_FE1) |
 767         (cpu_single_env->msr[MSR_IP] << MSR_IP) |
 768         (cpu_single_env->msr[MSR_IR] << MSR_IR) |
 769         (cpu_single_env->msr[MSR_DR] << MSR_DR) |
 770         (cpu_single_env->msr[MSR_RI] << MSR_RI) |
 771         (cpu_single_env->msr[MSR_LE] << MSR_LE);
 772 }
 773
 774 static int monitor_get_xer (struct MonitorDef *md)
 775 {
 776     return (cpu_single_env->xer[XER_SO] << XER_SO) |
 777         (cpu_single_env->xer[XER_OV] << XER_OV) |
 778         (cpu_single_env->xer[XER_CA] << XER_CA) |
 779         (cpu_single_env->xer[XER_BC] << XER_BC);
 780 }
 781
 782 uint32_t cpu_ppc_load_decr (CPUState *env);
 783 static int monitor_get_decr (struct MonitorDef *md)
 784 {
 785     return cpu_ppc_load_decr(cpu_single_env);
 786 }
 787
 788 uint32_t cpu_ppc_load_tbu (CPUState *env);
 789 static int monitor_get_tbu (struct MonitorDef *md)
 790 {
 791     return cpu_ppc_load_tbu(cpu_single_env);
 792 }
 793
 794 uint32_t cpu_ppc_load_tbl (CPUState *env);
 795 static int monitor_get_tbl (struct MonitorDef *md)
 796 {
 797     return cpu_ppc_load_tbl(cpu_single_env);
 798 }
 799 #endif
 800
 801 static MonitorDef monitor_defs[] = {
 802 #ifdef TARGET_I386
 803
 804 #define SEG(name, seg) \
 805     { name, offsetof(CPUState, segs[seg].selector) },\
 806     { name ".base", offsetof(CPUState, segs[seg].base) },\
 807     { name ".limit", offsetof(CPUState, segs[seg].limit) },
 808
 809     { "eax", offsetof(CPUState, regs[0]) },
 810     { "ecx", offsetof(CPUState, regs[1]) },
 811     { "edx", offsetof(CPUState, regs[2]) },
 812     { "ebx", offsetof(CPUState, regs[3]) },
 813     { "esp|sp", offsetof(CPUState, regs[4]) },
 814     { "ebp|fp", offsetof(CPUState, regs[5]) },
 815     { "esi", offsetof(CPUState, regs[6]) },
 816     { "esi", offsetof(CPUState, regs[7]) },
 817     { "eflags", offsetof(CPUState, eflags) },
 818     { "eip", offsetof(CPUState, eip) },
 819     SEG("cs", R_CS)
 820     SEG("ds", R_DS)
 821     SEG("es", R_ES)
 822     SEG("fs", R_FS)
 823     SEG("gs", R_GS)
 824     { "pc", 0, monitor_get_pc, },
 825 #elif defined(TARGET_PPC)
 826     { "r0", offsetof(CPUState, gpr[0]) },
 827     { "r1", offsetof(CPUState, gpr[1]) },
 828     { "r2", offsetof(CPUState, gpr[2]) },
 829     { "r3", offsetof(CPUState, gpr[3]) },
 830     { "r4", offsetof(CPUState, gpr[4]) },
 831     { "r5", offsetof(CPUState, gpr[5]) },
 832     { "r6", offsetof(CPUState, gpr[6]) },
 833     { "r7", offsetof(CPUState, gpr[7]) },
 834     { "r8", offsetof(CPUState, gpr[8]) },
 835     { "r9", offsetof(CPUState, gpr[9]) },
 836     { "r10", offsetof(CPUState, gpr[10]) },
 837     { "r11", offsetof(CPUState, gpr[11]) },
 838     { "r12", offsetof(CPUState, gpr[12]) },
 839     { "r13", offsetof(CPUState, gpr[13]) },
 840     { "r14", offsetof(CPUState, gpr[14]) },
 841     { "r15", offsetof(CPUState, gpr[15]) },
 842     { "r16", offsetof(CPUState, gpr[16]) },
 843     { "r17", offsetof(CPUState, gpr[17]) },
 844     { "r18", offsetof(CPUState, gpr[18]) },
 845     { "r19", offsetof(CPUState, gpr[19]) },
 846     { "r20", offsetof(CPUState, gpr[20]) },
 847     { "r21", offsetof(CPUState, gpr[21]) },
 848     { "r22", offsetof(CPUState, gpr[22]) },
 849     { "r23", offsetof(CPUState, gpr[23]) },
 850     { "r24", offsetof(CPUState, gpr[24]) },
 851     { "r25", offsetof(CPUState, gpr[25]) },
 852     { "r26", offsetof(CPUState, gpr[26]) },
 853     { "r27", offsetof(CPUState, gpr[27]) },
 854     { "r28", offsetof(CPUState, gpr[28]) },
 855     { "r29", offsetof(CPUState, gpr[29]) },
 856     { "r30", offsetof(CPUState, gpr[30]) },
 857     { "r31", offsetof(CPUState, gpr[31]) },
 858     { "nip|pc", offsetof(CPUState, nip) },
 859     { "lr", offsetof(CPUState, lr) },
 860     { "ctr", offsetof(CPUState, ctr) },
 861     { "decr", 0, &monitor_get_decr, },
 862     { "ccr", 0, &monitor_get_ccr, },
 863     { "msr", 0, &monitor_get_msr, },
 864     { "xer", 0, &monitor_get_xer, },
 865     { "tbu", 0, &monitor_get_tbu, },
 866     { "tbl", 0, &monitor_get_tbl, },
 867     { "sdr1", offsetof(CPUState, sdr1) },
 868     { "sr0", offsetof(CPUState, sr[0]) },
 869     { "sr1", offsetof(CPUState, sr[1]) },
 870     { "sr2", offsetof(CPUState, sr[2]) },
 871     { "sr3", offsetof(CPUState, sr[3]) },
 872     { "sr4", offsetof(CPUState, sr[4]) },
 873     { "sr5", offsetof(CPUState, sr[5]) },
 874     { "sr6", offsetof(CPUState, sr[6]) },
 875     { "sr7", offsetof(CPUState, sr[7]) },
 876     { "sr8", offsetof(CPUState, sr[8]) },
 877     { "sr9", offsetof(CPUState, sr[9]) },
 878     { "sr10", offsetof(CPUState, sr[10]) },
 879     { "sr11", offsetof(CPUState, sr[11]) },
 880     { "sr12", offsetof(CPUState, sr[12]) },
 881     { "sr13", offsetof(CPUState, sr[13]) },
 882     { "sr14", offsetof(CPUState, sr[14]) },
 883     { "sr15", offsetof(CPUState, sr[15]) },
 884     /* Too lazy to put BATs and SPRs ... */
 885 #endif
 886     { NULL },
 887 };
 888
 889 static void expr_error(const char *fmt)
 890 {
 891     term_printf(fmt);
 892     term_printf("\n");
 893     longjmp(expr_env, 1);
 894 }
 895
 896 static int get_monitor_def(int *pval, const char *name)
 897 {
 898     MonitorDef *md;
 899     for(md = monitor_defs; md->name != NULL; md++) {
 900         if (compare_cmd(name, md->name)) {
 901             if (md->get_value) {
 902                 *pval = md->get_value(md);
 903             } else {
 904                 *pval = *(uint32_t *)((uint8_t *)cpu_single_env + md->offset);
 905             }
 906             return 0;
 907         }
 908     }
 909     return -1;
 910 }
 911
 912 static void next(void)
 913 {
 914     if (pch != '\0') {
 915         pch++;
 916         while (isspace(*pch))
 917             pch++;
 918     }
 919 }
 920
 921 static int expr_sum(void);
 922
 923 static int expr_unary(void)
 924 {
 925     int n;
 926     char *p;
 927
 928     switch(*pch) {
 929     case '+':
 930         next();
 931         n = expr_unary();
 932         break;
 933     case '-':
 934         next();
 935         n = -expr_unary();
 936         break;
 937     case '~':
 938         next();
 939         n = ~expr_unary();
 940         break;
 941     case '(':
 942         next();
 943         n = expr_sum();
 944         if (*pch != ')') {
 945             expr_error("')' expected");
 946         }
 947         next();
 948         break;
 949     case '$':
 950         {
 951             char buf[128], *q;
 952
 953             pch++;
 954             q = buf;
 955             while ((*pch >= 'a' && *pch <= 'z') ||
 956                    (*pch >= 'A' && *pch <= 'Z') ||
 957                    (*pch >= '0' && *pch <= '9') ||
 958                    *pch == '_' || *pch == '.') {
 959                 if ((q - buf) < sizeof(buf) - 1)
 960                     *q++ = *pch;
 961                 pch++;
 962             }
 963             while (isspace(*pch))
 964                 pch++;
 965             *q = 0;
 966             if (get_monitor_def(&n, buf))
 967                 expr_error("unknown register");
 968         }
 969         break;
 970     case '\0':
 971         expr_error("unexpected end of expression");
 972         n = 0;
 973         break;
 974     default:
 975         n = strtoul(pch, &p, 0);
 976         if (pch == p) {
 977             expr_error("invalid char in expression");
 978         }
 979         pch = p;
 980         while (isspace(*pch))
 981             pch++;
 982         break;
 983     }
 984     return n;
 985 }
 986
 987
 988 static int expr_prod(void)
 989 {
 990     int val, val2, op;
 991
 992     val = expr_unary();
 993     for(;;) {
 994         op = *pch;
 995         if (op != '*' && op != '/' && op != '%')
 996             break;
 997         next();
 998         val2 = expr_unary();
 999         switch(op) {
1000         default:
1001         case '*':
1002             val *= val2;
1003             break;
1004         case '/':
1005         case '%':
1006             if (val2 == 0)
1007                 expr_error("division by zero");
1008             if (op == '/')
1009                 val /= val2;
1010             else
1011                 val %= val2;
1012             break;
1013         }
1014     }
1015     return val;
1016 }
1017
1018 static int expr_logic(void)
1019 {
1020     int val, val2, op;
1021
1022     val = expr_prod();
1023     for(;;) {
1024         op = *pch;
1025         if (op != '&' && op != '|' && op != '^')
1026             break;
1027         next();
1028         val2 = expr_prod();
1029         switch(op) {
1030         default:
1031         case '&':
1032             val &= val2;
1033             break;
1034         case '|':
1035             val |= val2;
1036             break;
1037         case '^':
1038             val ^= val2;
1039             break;
1040         }
1041     }
1042     return val;
1043 }
1044
1045 static int expr_sum(void)
1046 {
1047     int val, val2, op;
1048
1049     val = expr_logic();
1050     for(;;) {
1051         op = *pch;
1052         if (op != '+' && op != '-')
1053             break;
1054         next();
1055         val2 = expr_logic();
1056         if (op == '+')
1057             val += val2;
1058         else
1059             val -= val2;
1060     }
1061     return val;
1062 }
1063
1064 static int get_expr(int *pval, const char **pp)
1065 {
1066     pch = *pp;
1067     if (setjmp(expr_env)) {
1068         *pp = pch;
1069         return -1;
1070     }
1071     while (isspace(*pch))
1072         pch++;
1073     *pval = expr_sum();
1074     *pp = pch;
1075     return 0;
1076 }
1077
1078 static int get_str(char *buf, int buf_size, const char **pp)
1079 {
1080     const char *p;
1081     char *q;
1082     int c;
1083
1084     p = *pp;
1085     while (isspace(*p))
1086         p++;
1087     if (*p == '\0') {
1088     fail:
1089         *pp = p;
1090         return -1;
1091     }
1092     q = buf;
1093     if (*p == '\"') {
1094         p++;
1095         while (*p != '\0' && *p != '\"') {
1096             if (*p == '\\') {
1097                 p++;
1098                 c = *p++;
1099                 switch(c) {
1100                 case 'n':
1101                     c = '\n';
1102                     break;
1103                 case 'r':
1104                     c = '\r';
1105                     break;
1106                 case '\\':
1107                 case '\'':
1108                 case '\"':
1109                     break;
1110                 default:
1111                     qemu_printf("unsupported escape code: '\\%c'\n", c);
1112                     goto fail;
1113                 }
1114                 if ((q - buf) < buf_size - 1) {
1115                     *q++ = c;
1116                 }
1117             } else {
1118                 if ((q - buf) < buf_size - 1) {
1119                     *q++ = *p;
1120                 }
1121                 p++;
1122             }
1123         }
1124         if (*p != '\"') {
1125             qemu_printf("unterminated string\n");
1126             goto fail;
1127         }
1128         p++;
1129     } else {
1130         while (*p != '\0' && !isspace(*p)) {
1131             if ((q - buf) < buf_size - 1) {
1132                 *q++ = *p;
1133             }
1134             p++;
1135         }
1136         *q = '\0';
1137     }
1138     *pp = p;
1139     return 0;
1140 }
1141
1142 static int default_fmt_format = 'x';
1143 static int default_fmt_size = 4;
1144
1145 #define MAX_ARGS 16
1146
1147 static void term_handle_command(const char *cmdline)
1148 {
1149     const char *p, *pstart, *typestr;
1150     char *q;
1151     int c, nb_args, len, i, has_arg;
1152     term_cmd_t *cmd;
1153     char cmdname[256];
1154     char buf[1024];
1155     void *str_allocated[MAX_ARGS];
1156     void *args[MAX_ARGS];
1157
1158 #ifdef DEBUG
1159     term_printf("command='%s'\n", cmdline);
1160 #endif
1161
1162     /* extract the command name */
1163     p = cmdline;
1164     q = cmdname;
1165     while (isspace(*p))
1166         p++;
1167     if (*p == '\0')
1168         return;
1169     pstart = p;
1170     while (*p != '\0' && *p != '/' && !isspace(*p))
1171         p++;
1172     len = p - pstart;
1173     if (len > sizeof(cmdname) - 1)
1174         len = sizeof(cmdname) - 1;
1175     memcpy(cmdname, pstart, len);
1176     cmdname[len] = '\0';
1177
1178     /* find the command */
1179     for(cmd = term_cmds; cmd->name != NULL; cmd++) {
1180         if (compare_cmd(cmdname, cmd->name))
1181             goto found;
1182     }
1183     term_printf("unknown command: '%s'\n", cmdname);
1184     return;
1185  found:
1186
1187     for(i = 0; i < MAX_ARGS; i++)
1188         str_allocated[i] = NULL;
1189
1190     /* parse the parameters */
1191     typestr = cmd->args_type;
1192     nb_args = 0;
1193     for(;;) {
1194         c = *typestr;
1195         if (c == '\0')
1196             break;
1197         typestr++;
1198         switch(c) {
1199         case 'F':
1200         case 's':
1201             {
1202                 int ret;
1203                 char *str;
1204
1205                 while (isspace(*p))
1206                     p++;
1207                 if (*typestr == '?') {
1208                     typestr++;
1209                     if (*p == '\0') {
1210                         /* no optional string: NULL argument */
1211                         str = NULL;
1212                         goto add_str;
1213                     }
1214                 }
1215                 ret = get_str(buf, sizeof(buf), &p);
1216                 if (ret < 0) {
1217                     if (c == 'F')
1218                         term_printf("%s: filename expected\n", cmdname);
1219                     else
1220                         term_printf("%s: string expected\n", cmdname);
1221                     goto fail;
1222                 }
1223                 str = qemu_malloc(strlen(buf) + 1);
1224                 strcpy(str, buf);
1225                 str_allocated[nb_args] = str;
1226             add_str:
1227                 if (nb_args >= MAX_ARGS) {
1228                 error_args:
1229                     term_printf("%s: too many arguments\n", cmdname);
1230                     goto fail;
1231                 }
1232                 args[nb_args++] = str;
1233             }
1234             break;
1235         case '/':
1236             {
1237                 int count, format, size;
1238
1239                 while (isspace(*p))
1240                     p++;
1241                 if (*p == '/') {
1242                     /* format found */
1243                     p++;
1244                     count = 1;
1245                     if (isdigit(*p)) {
1246                         count = 0;
1247                         while (isdigit(*p)) {
1248                             count = count * 10 + (*p - '0');
1249                             p++;
1250                         }
1251                     }
1252                     size = -1;
1253                     format = -1;
1254                     for(;;) {
1255                         switch(*p) {
1256                         case 'o':
1257                         case 'd':
1258                         case 'u':
1259                         case 'x':
1260                         case 'i':
1261                         case 'c':
1262                             format = *p++;
1263                             break;
1264                         case 'b':
1265                             size = 1;
1266                             p++;
1267                             break;
1268                         case 'h':
1269                             size = 2;
1270                             p++;
1271                             break;
1272                         case 'w':
1273                             size = 4;
1274                             p++;
1275                             break;
1276                         case 'g':
1277                         case 'L':
1278                             size = 8;
1279                             p++;
1280                             break;
1281                         default:
1282                             goto next;
1283                         }
1284                     }
1285                 next:
1286                     if (*p != '\0' && !isspace(*p)) {
1287                         term_printf("invalid char in format: '%c'\n", *p);
1288                         goto fail;
1289                     }
1290                     if (format < 0)
1291                         format = default_fmt_format;
1292                     if (format != 'i') {
1293                         /* for 'i', not specifying a size gives -1 as size */
1294                         if (size < 0)
1295                             size = default_fmt_size;
1296                     }
1297                     default_fmt_size = size;
1298                     default_fmt_format = format;
1299                 } else {
1300                     count = 1;
1301                     format = default_fmt_format;
1302                     if (format != 'i') {
1303                         size = default_fmt_size;
1304                     } else {
1305                         size = -1;
1306                     }
1307                 }
1308                 if (nb_args + 3 > MAX_ARGS)
1309                     goto error_args;
1310                 args[nb_args++] = (void*)count;
1311                 args[nb_args++] = (void*)format;
1312                 args[nb_args++] = (void*)size;
1313             }
1314             break;
1315         case 'i':
1316             {
1317                 int val;
1318                 while (isspace(*p))
1319                     p++;
1320                 if (*typestr == '?' || *typestr == '.') {
1321                     typestr++;
1322                     if (*typestr == '?') {
1323                         if (*p == '\0')
1324                             has_arg = 0;
1325                         else
1326                             has_arg = 1;
1327                     } else {
1328                         if (*p == '.') {
1329                             p++;
1330                             while (isspace(*p))
1331                                 p++;
1332                             has_arg = 1;
1333                         } else {
1334                             has_arg = 0;
1335                         }
1336                     }
1337                     if (nb_args >= MAX_ARGS)
1338                         goto error_args;
1339                     args[nb_args++] = (void *)has_arg;
1340                     if (!has_arg) {
1341                         if (nb_args >= MAX_ARGS)
1342                             goto error_args;
1343                         val = -1;
1344                         goto add_num;
1345                     }
1346                 }
1347                 if (get_expr(&val, &p))
1348                     goto fail;
1349             add_num:
1350                 if (nb_args >= MAX_ARGS)
1351                     goto error_args;
1352                 args[nb_args++] = (void *)val;
1353             }
1354             break;
1355         case '-':
1356             {
1357                 int has_option;
1358                 /* option */
1359
1360                 c = *typestr++;
1361                 if (c == '\0')
1362                     goto bad_type;
1363                 while (isspace(*p))
1364                     p++;
1365                 has_option = 0;
1366                 if (*p == '-') {
1367                     p++;
1368                     if (*p != c) {
1369                         term_printf("%s: unsupported option -%c\n",
1370                                     cmdname, *p);
1371                         goto fail;
1372                     }
1373                     p++;
1374                     has_option = 1;
1375                 }
1376                 if (nb_args >= MAX_ARGS)
1377                     goto error_args;
1378                 args[nb_args++] = (void *)has_option;
1379             }
1380             break;
1381         default:
1382         bad_type:
1383             term_printf("%s: unknown type '%c'\n", cmdname, c);
1384             goto fail;
1385         }
1386     }
1387     /* check that all arguments were parsed */
1388     while (isspace(*p))
1389         p++;
1390     if (*p != '\0') {
1391         term_printf("%s: extraneous characters at the end of line\n",
1392                     cmdname);
1393         goto fail;
1394     }
1395
1396     switch(nb_args) {
1397     case 0:
1398         cmd->handler();
1399         break;
1400     case 1:
1401         cmd->handler(args[0]);
1402         break;
1403     case 2:
1404         cmd->handler(args[0], args[1]);
1405         break;
1406     case 3:
1407         cmd->handler(args[0], args[1], args[2]);
1408         break;
1409     case 4:
1410         cmd->handler(args[0], args[1], args[2], args[3]);
1411         break;
1412     case 5:
1413         cmd->handler(args[0], args[1], args[2], args[3], args[4]);
1414         break;
1415     case 6:
1416         cmd->handler(args[0], args[1], args[2], args[3], args[4], args[5]);
1417         break;
1418     default:
1419         term_printf("unsupported number of arguments: %d\n", nb_args);
1420         goto fail;
1421     }
1422  fail:
1423     for(i = 0; i < MAX_ARGS; i++)
1424         qemu_free(str_allocated[i]);
1425     return;
1426 }
1427
1428 static void term_show_prompt(void)
1429 {
1430     term_printf("(qemu) ");
1431     fflush(stdout);
1432     term_cmd_buf_index = 0;
1433     term_cmd_buf_size = 0;
1434     term_esc_state = IS_NORM;
1435 }
1436
1437 static void term_print_cmdline (const char *cmdline)
1438 {
1439     term_show_prompt();
1440     term_printf(cmdline);
1441     term_flush();
1442 }
1443
1444 static void term_insert_char(int ch)
1445 {
1446     if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
1447         memmove(term_cmd_buf + term_cmd_buf_index + 1,
1448                 term_cmd_buf + term_cmd_buf_index,
1449                 term_cmd_buf_size - term_cmd_buf_index);
1450         term_cmd_buf[term_cmd_buf_index] = ch;
1451         term_cmd_buf_size++;
1452         term_printf("\033[@%c", ch);
1453         term_cmd_buf_index++;
1454         term_flush();
1455     }
1456 }
1457
1458 static void term_backward_char(void)
1459 {
1460     if (term_cmd_buf_index > 0) {
1461         term_cmd_buf_index--;
1462         term_printf("\033[D");
1463         term_flush();
1464     }
1465 }
1466
1467 static void term_forward_char(void)
1468 {
1469     if (term_cmd_buf_index < term_cmd_buf_size) {
1470         term_cmd_buf_index++;
1471         term_printf("\033[C");
1472         term_flush();
1473     }
1474 }
1475
1476 static void term_delete_char(void)
1477 {
1478     if (term_cmd_buf_index < term_cmd_buf_size) {
1479         memmove(term_cmd_buf + term_cmd_buf_index,
1480                 term_cmd_buf + term_cmd_buf_index + 1,
1481                 term_cmd_buf_size - term_cmd_buf_index - 1);
1482         term_printf("\033[P");
1483         term_cmd_buf_size--;
1484         term_flush();
1485     }
1486 }
1487
1488 static void term_backspace(void)
1489 {
1490     if (term_cmd_buf_index > 0) {
1491         term_backward_char();
1492         term_delete_char();
1493     }
1494 }
1495
1496 static void term_bol(void)
1497 {
1498     while (term_cmd_buf_index > 0)
1499         term_backward_char();
1500 }
1501
1502 static void term_eol(void)
1503 {
1504     while (term_cmd_buf_index < term_cmd_buf_size)
1505         term_forward_char();
1506 }
1507
1508 static void term_up_char(void)
1509 {
1510     int idx;
1511
1512     if (term_hist_entry == 0)
1513         return;
1514     if (term_hist_entry == -1) {
1515         /* Find latest entry */
1516         for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
1517             if (term_history[idx] == NULL)
1518                 break;
1519         }
1520         term_hist_entry = idx;
1521     }
1522     term_hist_entry--;
1523     if (term_hist_entry >= 0) {
1524         strcpy(term_cmd_buf, term_history[term_hist_entry]);
1525         term_printf("\n");
1526         term_print_cmdline(term_cmd_buf);
1527         term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
1528     }
1529 }
1530
1531 static void term_down_char(void)
1532 {
1533     if (term_hist_entry == TERM_MAX_CMDS - 1 || term_hist_entry == -1)
1534         return;
1535     if (term_history[++term_hist_entry] != NULL) {
1536         strcpy(term_cmd_buf, term_history[term_hist_entry]);
1537     } else {
1538         term_hist_entry = -1;
1539     }
1540     term_printf("\n");
1541     term_print_cmdline(term_cmd_buf);
1542     term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
1543 }
1544
1545 static void term_hist_add(const char *cmdline)
1546 {
1547     char *hist_entry, *new_entry;
1548     int idx;
1549
1550     if (cmdline[0] == '\0')
1551         return;
1552     new_entry = NULL;
1553     if (term_hist_entry != -1) {
1554         /* We were editing an existing history entry: replace it */
1555         hist_entry = term_history[term_hist_entry];
1556         idx = term_hist_entry;
1557         if (strcmp(hist_entry, cmdline) == 0) {
1558             goto same_entry;
1559         }
1560     }
1561     /* Search cmdline in history buffers */
1562     for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
1563         hist_entry = term_history[idx];
1564         if (hist_entry == NULL)
1565             break;
1566         if (strcmp(hist_entry, cmdline) == 0) {
1567         same_entry:
1568             new_entry = hist_entry;
1569             /* Put this entry at the end of history */
1570             memmove(&term_history[idx], &term_history[idx + 1],
1571                     &term_history[TERM_MAX_CMDS] - &term_history[idx + 1]);
1572             term_history[TERM_MAX_CMDS - 1] = NULL;
1573             for (; idx < TERM_MAX_CMDS; idx++) {
1574                 if (term_history[idx] == NULL)
1575                     break;
1576             }
1577             break;
1578         }
1579     }
1580     if (idx == TERM_MAX_CMDS) {
1581         /* Need to get one free slot */
1582         free(term_history[0]);
1583         memcpy(term_history, &term_history[1],
1584                &term_history[TERM_MAX_CMDS] - &term_history[1]);
1585         term_history[TERM_MAX_CMDS - 1] = NULL;
1586         idx = TERM_MAX_CMDS - 1;
1587     }
1588     if (new_entry == NULL)
1589         new_entry = strdup(cmdline);
1590     term_history[idx] = new_entry;
1591     term_hist_entry = -1;
1592 }
1593
1594 /* return true if command handled */
1595 static void term_handle_byte(int ch)
1596 {
1597     switch(term_esc_state) {
1598     case IS_NORM:
1599         switch(ch) {
1600         case 1:
1601             term_bol();
1602             break;
1603         case 5:
1604             term_eol();
1605             break;
1606         case 10:
1607         case 13:
1608             term_cmd_buf[term_cmd_buf_size] = '\0';
1609             term_hist_add(term_cmd_buf);
1610             term_printf("\n");
1611             term_handle_command(term_cmd_buf);
1612             term_show_prompt();
1613             break;
1614         case 27:
1615             term_esc_state = IS_ESC;
1616             break;
1617         case 127:
1618         case 8:
1619             term_backspace();
1620             break;
1621         case 155:
1622             term_esc_state = IS_CSI;
1623             break;
1624         default:
1625             if (ch >= 32) {
1626                 term_insert_char(ch);
1627             }
1628             break;
1629         }
1630         break;
1631     case IS_ESC:
1632         if (ch == '[') {
1633             term_esc_state = IS_CSI;
1634             term_esc_param = 0;
1635         } else {
1636             term_esc_state = IS_NORM;
1637         }
1638         break;
1639     case IS_CSI:
1640         switch(ch) {
1641         case 'A':
1642         case 'F':
1643             term_up_char();
1644             break;
1645         case 'B':
1646         case 'E':
1647             term_down_char();
1648             break;
1649         case 'D':
1650             term_backward_char();
1651             break;
1652         case 'C':
1653             term_forward_char();
1654             break;
1655         case '0' ... '9':
1656             term_esc_param = term_esc_param * 10 + (ch - '0');
1657             goto the_end;
1658         case '~':
1659             switch(term_esc_param) {
1660             case 1:
1661                 term_bol();
1662                 break;
1663             case 3:
1664                 term_delete_char();
1665                 break;
1666             case 4:
1667                 term_eol();
1668                 break;
1669             }
1670             break;
1671         default:
1672             break;
1673         }
1674         term_esc_state = IS_NORM;
1675     the_end:
1676         break;
1677     }
1678 }
1679
1680 /*************************************************************/
1681 /* serial console support */
1682
1683 #define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */
1684
1685 static int term_got_escape, term_command;
1686
1687 void term_print_help(void)
1688 {
1689     term_printf("\n"
1690                 "C-a h    print this help\n"
1691                 "C-a x    exit emulatior\n"
1692                 "C-a s    save disk data back to file (if -snapshot)\n"
1693                 "C-a b    send break (magic sysrq)\n"
1694                 "C-a c    switch between console and monitor\n"
1695                 "C-a C-a  send C-a\n"
1696                 );
1697 }
1698
1699 /* called when a char is received */
1700 static void term_received_byte(int ch)
1701 {
1702     if (!serial_console) {
1703         /* if no serial console, handle every command */
1704         term_handle_byte(ch);
1705     } else {
1706         if (term_got_escape) {
1707             term_got_escape = 0;
1708             switch(ch) {
1709             case 'h':
1710                 term_print_help();
1711                 break;
1712             case 'x':
1713                 exit(0);
1714                 break;
1715             case 's':
1716                 {
1717                     int i;
1718                     for (i = 0; i < MAX_DISKS; i++) {
1719                         if (bs_table[i])
1720                             bdrv_commit(bs_table[i]);
1721                     }
1722                 }
1723                 break;
1724             case 'b':
1725                 if (serial_console)
1726                     serial_receive_break(serial_console);
1727                 break;
1728             case 'c':
1729                 if (!term_command) {
1730                     term_show_prompt();
1731                     term_command = 1;
1732                 } else {
1733                     term_command = 0;
1734                 }
1735                 break;
1736             case TERM_ESCAPE:
1737                 goto send_char;
1738             }
1739         } else if (ch == TERM_ESCAPE) {
1740             term_got_escape = 1;
1741         } else {
1742         send_char:
1743             if (term_command) {
1744                 term_handle_byte(ch);
1745             } else {
1746                 if (serial_console)
1747                     serial_receive_byte(serial_console, ch);
1748             }
1749         }
1750     }
1751 }
1752
1753 static int term_can_read(void *opaque)
1754 {
1755     if (serial_console) {
1756         return serial_can_receive(serial_console);
1757     } else {
1758         return 128;
1759     }
1760 }
1761
1762 static void term_read(void *opaque, const uint8_t *buf, int size)
1763 {
1764     int i;
1765     for(i = 0; i < size; i++)
1766         term_received_byte(buf[i]);
1767 }
1768
1769 void monitor_init(void)
1770 {
1771     if (!serial_console) {
1772         term_printf("QEMU %s monitor - type 'help' for more information\n",
1773                     QEMU_VERSION);
1774         term_show_prompt();
1775     }
1776     term_hist_entry = -1;
1777     qemu_add_fd_read_handler(0, term_can_read, term_read, NULL);
1778 }