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         /* we use the current CS size */
 354         if (!(cpu_single_env->segs[R_CS].flags & DESC_B_MASK))
 355             flags = 1;
 356 #endif
 357         monitor_disas(addr, count, is_physical, flags);
 358         return;
 359     }
 360
 361     len = wsize * count;
 362     if (wsize == 1)
 363         line_size = 8;
 364     else
 365         line_size = 16;
 366     nb_per_line = line_size / wsize;
 367     max_digits = 0;
 368
 369     switch(format) {
 370     case 'o':
 371         max_digits = (wsize * 8 + 2) / 3;
 372         break;
 373     default:
 374     case 'x':
 375         max_digits = (wsize * 8) / 4;
 376         break;
 377     case 'u':
 378     case 'd':
 379         max_digits = (wsize * 8 * 10 + 32) / 33;
 380         break;
 381     case 'c':
 382         wsize = 1;
 383         break;
 384     }
 385
 386     while (len > 0) {
 387         term_printf("0x%08x:", addr);
 388         l = len;
 389         if (l > line_size)
 390             l = line_size;
 391         if (is_physical) {
 392             cpu_physical_memory_rw(addr, buf, l, 0);
 393         } else {
 394             cpu_memory_rw_debug(cpu_single_env, addr, buf, l, 0);
 395         }
 396         i = 0;
 397         while (i < l) {
 398             switch(wsize) {
 399             default:
 400             case 1:
 401                 v = ldub_raw(buf + i);
 402                 break;
 403             case 2:
 404                 v = lduw_raw(buf + i);
 405                 break;
 406             case 4:
 407                 v = ldl_raw(buf + i);
 408                 break;
 409             case 8:
 410                 v = ldq_raw(buf + i);
 411                 break;
 412             }
 413             term_printf(" ");
 414             switch(format) {
 415             case 'o':
 416                 term_printf("%#*llo", max_digits, v);
 417                 break;
 418             case 'x':
 419                 term_printf("0x%0*llx", max_digits, v);
 420                 break;
 421             case 'u':
 422                 term_printf("%*llu", max_digits, v);
 423                 break;
 424             case 'd':
 425                 term_printf("%*lld", max_digits, v);
 426                 break;
 427             case 'c':
 428                 term_printc(v);
 429                 break;
 430             }
 431             i += wsize;
 432         }
 433         term_printf("\n");
 434         addr += l;
 435         len -= l;
 436     }
 437 }
 438
 439 static void do_memory_dump(int count, int format, int size, int addr)
 440 {
 441     memory_dump(count, format, size, addr, 0);
 442 }
 443
 444 static void do_physical_memory_dump(int count, int format, int size, int addr)
 445 {
 446     memory_dump(count, format, size, addr, 1);
 447 }
 448
 449 static void do_print(int count, int format, int size, int val)
 450 {
 451     switch(format) {
 452     case 'o':
 453         term_printf("%#o", val);
 454         break;
 455     case 'x':
 456         term_printf("%#x", val);
 457         break;
 458     case 'u':
 459         term_printf("%u", val);
 460         break;
 461     default:
 462     case 'd':
 463         term_printf("%d", val);
 464         break;
 465     case 'c':
 466         term_printc(val);
 467         break;
 468     }
 469     term_printf("\n");
 470 }
 471
 472 static term_cmd_t term_cmds[] = {
 473     { "help|?", "s?", do_help,
 474       "[cmd]", "show the help" },
 475     { "commit", "", do_commit,
 476       "", "commit changes to the disk images (if -snapshot is used)" },
 477     { "info", "s?", do_info,
 478       "subcommand", "show various information about the system state" },
 479     { "q|quit", "", do_quit,
 480       "", "quit the emulator" },
 481     { "eject", "-fs", do_eject,
 482       "[-f] device", "eject a removable media (use -f to force it)" },
 483     { "change", "sF", do_change,
 484       "device filename", "change a removable media" },
 485     { "screendump", "F", do_screen_dump,
 486       "filename", "save screen into PPM image 'filename'" },
 487     { "log", "s", do_log,
 488       "item1[,...]", "activate logging of the specified items to '/tmp/qemu.log'" },
 489     { "savevm", "F", do_savevm,
 490       "filename", "save the whole virtual machine state to 'filename'" },
 491     { "loadvm", "F", do_loadvm,
 492       "filename", "restore the whole virtual machine state from 'filename'" },
 493     { "stop", "", do_stop,
 494       "", "stop emulation", },
 495     { "c|cont", "", do_cont,
 496       "", "resume emulation", },
 497 #ifdef CONFIG_GDBSTUB
 498     { "gdbserver", "i?", do_gdbserver,
 499       "[port]", "start gdbserver session (default port=1234)", },
 500 #endif
 501     { "x", "/i", do_memory_dump,
 502       "/fmt addr", "virtual memory dump starting at 'addr'", },
 503     { "xp", "/i", do_physical_memory_dump,
 504       "/fmt addr", "physical memory dump starting at 'addr'", },
 505     { "p|print", "/i", do_print,
 506       "/fmt expr", "print expression value (use $reg for CPU register access)", },
 507     { NULL, NULL, },
 508 };
 509
 510 static term_cmd_t info_cmds[] = {
 511     { "network", "", do_info_network,
 512       "", "show the network state" },
 513     { "block", "", do_info_block,
 514       "", "show the block devices" },
 515     { "registers", "", do_info_registers,
 516       "", "show the cpu registers" },
 517     { "history", "", do_info_history,
 518       "", "show the command line history", },
 519     { NULL, NULL, },
 520 };
 521
 522 /*******************************************************************/
 523
 524 static const char *pch;
 525 static jmp_buf expr_env;
 526
 527 typedef struct MonitorDef {
 528     const char *name;
 529     int offset;
 530     int (*get_value)(struct MonitorDef *md);
 531 } MonitorDef;
 532
 533 #if defined(TARGET_PPC)
 534 static int monitor_get_ccr (struct MonitorDef *md)
 535 {
 536     unsigned int u;
 537     int i;
 538
 539     u = 0;
 540     for (i = 0; i < 8; i++)
 541         u |= cpu_single_env->crf[i] << (32 - (4 * i));
 542
 543     return u;
 544 }
 545
 546 static int monitor_get_msr (struct MonitorDef *md)
 547 {
 548     return (cpu_single_env->msr[MSR_POW] << MSR_POW) |
 549         (cpu_single_env->msr[MSR_ILE] << MSR_ILE) |
 550         (cpu_single_env->msr[MSR_EE] << MSR_EE) |
 551         (cpu_single_env->msr[MSR_PR] << MSR_PR) |
 552         (cpu_single_env->msr[MSR_FP] << MSR_FP) |
 553         (cpu_single_env->msr[MSR_ME] << MSR_ME) |
 554         (cpu_single_env->msr[MSR_FE0] << MSR_FE0) |
 555         (cpu_single_env->msr[MSR_SE] << MSR_SE) |
 556         (cpu_single_env->msr[MSR_BE] << MSR_BE) |
 557         (cpu_single_env->msr[MSR_FE1] << MSR_FE1) |
 558         (cpu_single_env->msr[MSR_IP] << MSR_IP) |
 559         (cpu_single_env->msr[MSR_IR] << MSR_IR) |
 560         (cpu_single_env->msr[MSR_DR] << MSR_DR) |
 561         (cpu_single_env->msr[MSR_RI] << MSR_RI) |
 562         (cpu_single_env->msr[MSR_LE] << MSR_LE);
 563 }
 564
 565 static int monitor_get_xer (struct MonitorDef *md)
 566 {
 567     return (cpu_single_env->xer[XER_SO] << XER_SO) |
 568         (cpu_single_env->xer[XER_OV] << XER_OV) |
 569         (cpu_single_env->xer[XER_CA] << XER_CA) |
 570         (cpu_single_env->xer[XER_BC] << XER_BC);
 571 }
 572 #endif
 573
 574 static MonitorDef monitor_defs[] = {
 575 #ifdef TARGET_I386
 576     { "eax", offsetof(CPUState, regs[0]) },
 577     { "ecx", offsetof(CPUState, regs[1]) },
 578     { "edx", offsetof(CPUState, regs[2]) },
 579     { "ebx", offsetof(CPUState, regs[3]) },
 580     { "esp|sp", offsetof(CPUState, regs[4]) },
 581     { "ebp|fp", offsetof(CPUState, regs[5]) },
 582     { "esi", offsetof(CPUState, regs[6]) },
 583     { "esi", offsetof(CPUState, regs[7]) },
 584     { "eflags", offsetof(CPUState, eflags) },
 585     { "eip|pc", offsetof(CPUState, eip) },
 586 #elif defined(TARGET_PPC)
 587     { "r0", offsetof(CPUState, gpr[0]) },
 588     { "r1", offsetof(CPUState, gpr[1]) },
 589     { "r2", offsetof(CPUState, gpr[2]) },
 590     { "r3", offsetof(CPUState, gpr[3]) },
 591     { "r4", offsetof(CPUState, gpr[4]) },
 592     { "r5", offsetof(CPUState, gpr[5]) },
 593     { "r6", offsetof(CPUState, gpr[6]) },
 594     { "r7", offsetof(CPUState, gpr[7]) },
 595     { "r8", offsetof(CPUState, gpr[8]) },
 596     { "r9", offsetof(CPUState, gpr[9]) },
 597     { "r10", offsetof(CPUState, gpr[10]) },
 598     { "r11", offsetof(CPUState, gpr[11]) },
 599     { "r12", offsetof(CPUState, gpr[12]) },
 600     { "r13", offsetof(CPUState, gpr[13]) },
 601     { "r14", offsetof(CPUState, gpr[14]) },
 602     { "r15", offsetof(CPUState, gpr[15]) },
 603     { "r16", offsetof(CPUState, gpr[16]) },
 604     { "r17", offsetof(CPUState, gpr[17]) },
 605     { "r18", offsetof(CPUState, gpr[18]) },
 606     { "r19", offsetof(CPUState, gpr[19]) },
 607     { "r20", offsetof(CPUState, gpr[20]) },
 608     { "r21", offsetof(CPUState, gpr[21]) },
 609     { "r22", offsetof(CPUState, gpr[22]) },
 610     { "r23", offsetof(CPUState, gpr[23]) },
 611     { "r24", offsetof(CPUState, gpr[24]) },
 612     { "r25", offsetof(CPUState, gpr[25]) },
 613     { "r26", offsetof(CPUState, gpr[26]) },
 614     { "r27", offsetof(CPUState, gpr[27]) },
 615     { "r28", offsetof(CPUState, gpr[28]) },
 616     { "r29", offsetof(CPUState, gpr[29]) },
 617     { "r30", offsetof(CPUState, gpr[30]) },
 618     { "r31", offsetof(CPUState, gpr[31]) },
 619     { "lr", offsetof(CPUState, lr) },
 620     { "ctr", offsetof(CPUState, ctr) },
 621     { "decr", offsetof(CPUState, decr) },
 622     { "ccr", 0, &monitor_get_ccr, },
 623     { "msr", 0, &monitor_get_msr, },
 624     { "xer", 0, &monitor_get_xer, },
 625     { "tbu", offsetof(CPUState, tb[0]) },
 626     { "tbl", offsetof(CPUState, tb[1]) },
 627     { "sdr1", offsetof(CPUState, sdr1) },
 628     { "sr0", offsetof(CPUState, sr[0]) },
 629     { "sr1", offsetof(CPUState, sr[1]) },
 630     { "sr2", offsetof(CPUState, sr[2]) },
 631     { "sr3", offsetof(CPUState, sr[3]) },
 632     { "sr4", offsetof(CPUState, sr[4]) },
 633     { "sr5", offsetof(CPUState, sr[5]) },
 634     { "sr6", offsetof(CPUState, sr[6]) },
 635     { "sr7", offsetof(CPUState, sr[7]) },
 636     { "sr8", offsetof(CPUState, sr[8]) },
 637     { "sr9", offsetof(CPUState, sr[9]) },
 638     { "sr10", offsetof(CPUState, sr[10]) },
 639     { "sr11", offsetof(CPUState, sr[11]) },
 640     { "sr12", offsetof(CPUState, sr[12]) },
 641     { "sr13", offsetof(CPUState, sr[13]) },
 642     { "sr14", offsetof(CPUState, sr[14]) },
 643     { "sr15", offsetof(CPUState, sr[15]) },
 644     /* Too lazy to put BATs and SPRs ... */
 645 #endif
 646     { NULL },
 647 };
 648
 649 static void expr_error(const char *fmt)
 650 {
 651     term_printf(fmt);
 652     term_printf("\n");
 653     longjmp(expr_env, 1);
 654 }
 655
 656 static int get_monitor_def(int *pval, const char *name)
 657 {
 658     MonitorDef *md;
 659     for(md = monitor_defs; md->name != NULL; md++) {
 660         if (compare_cmd(name, md->name)) {
 661             if (md->get_value) {
 662                 *pval = md->get_value(md);
 663             } else {
 664                 *pval = *(uint32_t *)((uint8_t *)cpu_single_env + md->offset);
 665             }
 666             return 0;
 667         }
 668     }
 669     return -1;
 670 }
 671
 672 static void next(void)
 673 {
 674     if (pch != '\0') {
 675         pch++;
 676         while (isspace(*pch))
 677             pch++;
 678     }
 679 }
 680
 681 static int expr_sum(void);
 682
 683 static int expr_unary(void)
 684 {
 685     int n;
 686     char *p;
 687
 688     switch(*pch) {
 689     case '+':
 690         next();
 691         n = expr_unary();
 692         break;
 693     case '-':
 694         next();
 695         n = -expr_unary();
 696         break;
 697     case '~':
 698         next();
 699         n = ~expr_unary();
 700         break;
 701     case '(':
 702         next();
 703         n = expr_sum();
 704         if (*pch != ')') {
 705             expr_error("')' expected");
 706         }
 707         next();
 708         break;
 709     case '$':
 710         {
 711             char buf[128], *q;
 712
 713             pch++;
 714             q = buf;
 715             while ((*pch >= 'a' && *pch <= 'z') ||
 716                    (*pch >= 'A' && *pch <= 'Z') ||
 717                    (*pch >= '0' && *pch <= '9') ||
 718                    *pch == '_') {
 719                 if ((q - buf) < sizeof(buf) - 1)
 720                     *q++ = *pch;
 721                 pch++;
 722             }
 723             while (isspace(*pch))
 724                 pch++;
 725             *q = 0;
 726             if (get_monitor_def(&n, buf))
 727                 expr_error("unknown register");
 728         }
 729         break;
 730     case '\0':
 731         expr_error("unexpected end of expression");
 732         n = 0;
 733         break;
 734     default:
 735         n = strtoul(pch, &p, 0);
 736         if (pch == p) {
 737             expr_error("invalid char in expression");
 738         }
 739         pch = p;
 740         while (isspace(*pch))
 741             pch++;
 742         break;
 743     }
 744     return n;
 745 }
 746
 747
 748 static int expr_prod(void)
 749 {
 750     int val, val2, op;
 751
 752     val = expr_unary();
 753     for(;;) {
 754         op = *pch;
 755         if (op != '*' && op != '/' && op != '%')
 756             break;
 757         next();
 758         val2 = expr_unary();
 759         switch(op) {
 760         default:
 761         case '*':
 762             val *= val2;
 763             break;
 764         case '/':
 765         case '%':
 766             if (val2 == 0)
 767                 expr_error("divison by zero");
 768             if (op == '/')
 769                 val /= val2;
 770             else
 771                 val %= val2;
 772             break;
 773         }
 774     }
 775     return val;
 776 }
 777
 778 static int expr_logic(void)
 779 {
 780     int val, val2, op;
 781
 782     val = expr_prod();
 783     for(;;) {
 784         op = *pch;
 785         if (op != '&' && op != '|' && op != '^')
 786             break;
 787         next();
 788         val2 = expr_prod();
 789         switch(op) {
 790         default:
 791         case '&':
 792             val &= val2;
 793             break;
 794         case '|':
 795             val |= val2;
 796             break;
 797         case '^':
 798             val ^= val2;
 799             break;
 800         }
 801     }
 802     return val;
 803 }
 804
 805 static int expr_sum(void)
 806 {
 807     int val, val2, op;
 808
 809     val = expr_logic();
 810     for(;;) {
 811         op = *pch;
 812         if (op != '+' && op != '-')
 813             break;
 814         next();
 815         val2 = expr_logic();
 816         if (op == '+')
 817             val += val2;
 818         else
 819             val -= val2;
 820     }
 821     return val;
 822 }
 823
 824 static int get_expr(int *pval, const char **pp)
 825 {
 826     pch = *pp;
 827     if (setjmp(expr_env)) {
 828         *pp = pch;
 829         return -1;
 830     }
 831     while (isspace(*pch))
 832         pch++;
 833     *pval = expr_sum();
 834     *pp = pch;
 835     return 0;
 836 }
 837
 838 static int get_str(char *buf, int buf_size, const char **pp)
 839 {
 840     const char *p;
 841     char *q;
 842     int c;
 843
 844     p = *pp;
 845     while (isspace(*p))
 846         p++;
 847     if (*p == '\0') {
 848     fail:
 849         *pp = p;
 850         return -1;
 851     }
 852     q = buf;
 853     if (*p == '\"') {
 854         p++;
 855         while (*p != '\0' && *p != '\"') {
 856             if (*p == '\\') {
 857                 p++;
 858                 c = *p++;
 859                 switch(c) {
 860                 case 'n':
 861                     c = '\n';
 862                     break;
 863                 case 'r':
 864                     c = '\r';
 865                     break;
 866                 case '\\':
 867                 case '\'':
 868                 case '\"':
 869                     break;
 870                 default:
 871                     qemu_printf("unsupported escape code: '\\%c'\n", c);
 872                     goto fail;
 873                 }
 874                 if ((q - buf) < buf_size - 1) {
 875                     *q++ = c;
 876                 }
 877             } else {
 878                 if ((q - buf) < buf_size - 1) {
 879                     *q++ = *p;
 880                 }
 881                 p++;
 882             }
 883         }
 884         if (*p != '\"') {
 885             qemu_printf("untermintated string\n");
 886             goto fail;
 887         }
 888         p++;
 889     } else {
 890         while (*p != '\0' && !isspace(*p)) {
 891             if ((q - buf) < buf_size - 1) {
 892                 *q++ = *p;
 893             }
 894             p++;
 895         }
 896         *q = '\0';
 897     }
 898     *pp = p;
 899     return 0;
 900 }
 901
 902 static int default_fmt_format = 'x';
 903 static int default_fmt_size = 4;
 904
 905 #define MAX_ARGS 16
 906
 907 static void term_handle_command(const char *cmdline)
 908 {
 909     const char *p, *pstart, *typestr;
 910     char *q;
 911     int c, nb_args, len, i, has_arg;
 912     term_cmd_t *cmd;
 913     char cmdname[256];
 914     char buf[1024];
 915     void *str_allocated[MAX_ARGS];
 916     void *args[MAX_ARGS];
 917
 918 #ifdef DEBUG
 919     term_printf("command='%s'\n", cmdline);
 920 #endif
 921
 922     /* extract the command name */
 923     p = cmdline;
 924     q = cmdname;
 925     while (isspace(*p))
 926         p++;
 927     if (*p == '\0')
 928         return;
 929     pstart = p;
 930     while (*p != '\0' && *p != '/' && !isspace(*p))
 931         p++;
 932     len = p - pstart;
 933     if (len > sizeof(cmdname) - 1)
 934         len = sizeof(cmdname) - 1;
 935     memcpy(cmdname, pstart, len);
 936     cmdname[len] = '\0';
 937
 938     /* find the command */
 939     for(cmd = term_cmds; cmd->name != NULL; cmd++) {
 940         if (compare_cmd(cmdname, cmd->name))
 941             goto found;
 942     }
 943     term_printf("unknown command: '%s'\n", cmdname);
 944     return;
 945  found:
 946
 947     for(i = 0; i < MAX_ARGS; i++)
 948         str_allocated[i] = NULL;
 949
 950     /* parse the parameters */
 951     typestr = cmd->args_type;
 952     nb_args = 0;
 953     for(;;) {
 954         c = *typestr;
 955         if (c == '\0')
 956             break;
 957         typestr++;
 958         switch(c) {
 959         case 'F':
 960         case 's':
 961             {
 962                 int ret;
 963                 char *str;
 964
 965                 while (isspace(*p))
 966                     p++;
 967                 if (*typestr == '?') {
 968                     typestr++;
 969                     if (*p == '\0') {
 970                         /* no optional string: NULL argument */
 971                         str = NULL;
 972                         goto add_str;
 973                     }
 974                 }
 975                 ret = get_str(buf, sizeof(buf), &p);
 976                 if (ret < 0) {
 977                     if (c == 'F')
 978                         term_printf("%s: filename expected\n", cmdname);
 979                     else
 980                         term_printf("%s: string expected\n", cmdname);
 981                     goto fail;
 982                 }
 983                 str = qemu_malloc(strlen(buf) + 1);
 984                 strcpy(str, buf);
 985                 str_allocated[nb_args] = str;
 986             add_str:
 987                 if (nb_args >= MAX_ARGS) {
 988                 error_args:
 989                     term_printf("%s: too many arguments\n", cmdname);
 990                     goto fail;
 991                 }
 992                 args[nb_args++] = str;
 993             }
 994             break;
 995         case '/':
 996             {
 997                 int count, format, size;
 998
 999                 while (isspace(*p))
1000                     p++;
1001                 if (*p == '/') {
1002                     /* format found */
1003                     p++;
1004                     count = 1;
1005                     if (isdigit(*p)) {
1006                         count = 0;
1007                         while (isdigit(*p)) {
1008                             count = count * 10 + (*p - '0');
1009                             p++;
1010                         }
1011                     }
1012                     size = -1;
1013                     format = -1;
1014                     for(;;) {
1015                         switch(*p) {
1016                         case 'o':
1017                         case 'd':
1018                         case 'u':
1019                         case 'x':
1020                         case 'i':
1021                         case 'c':
1022                             format = *p++;
1023                             break;
1024                         case 'b':
1025                             size = 1;
1026                             p++;
1027                             break;
1028                         case 'h':
1029                             size = 2;
1030                             p++;
1031                             break;
1032                         case 'w':
1033                             size = 4;
1034                             p++;
1035                             break;
1036                         case 'g':
1037                         case 'L':
1038                             size = 8;
1039                             p++;
1040                             break;
1041                         default:
1042                             goto next;
1043                         }
1044                     }
1045                 next:
1046                     if (*p != '\0' && !isspace(*p)) {
1047                         term_printf("invalid char in format: '%c'\n", *p);
1048                         goto fail;
1049                     }
1050                     if (size < 0)
1051                         size = default_fmt_size;
1052                     if (format < 0)
1053                         format = default_fmt_format;
1054                     default_fmt_size = size;
1055                     default_fmt_format = format;
1056                 } else {
1057                     count = 1;
1058                     format = default_fmt_format;
1059                     size = default_fmt_size;
1060                 }
1061                 if (nb_args + 3 > MAX_ARGS)
1062                     goto error_args;
1063                 args[nb_args++] = (void*)count;
1064                 args[nb_args++] = (void*)format;
1065                 args[nb_args++] = (void*)size;
1066             }
1067             break;
1068         case 'i':
1069             {
1070                 int val;
1071                 while (isspace(*p))
1072                     p++;
1073                 if (*typestr == '?') {
1074                     typestr++;
1075                     if (*p == '\0')
1076                         has_arg = 0;
1077                     else
1078                         has_arg = 1;
1079                     if (nb_args >= MAX_ARGS)
1080                         goto error_args;
1081                     args[nb_args++] = (void *)has_arg;
1082                     if (!has_arg) {
1083                         if (nb_args >= MAX_ARGS)
1084                             goto error_args;
1085                         val = -1;
1086                         goto add_num;
1087                     }
1088                 }
1089                 if (get_expr(&val, &p))
1090                     goto fail;
1091             add_num:
1092                 if (nb_args >= MAX_ARGS)
1093                     goto error_args;
1094                 args[nb_args++] = (void *)val;
1095             }
1096             break;
1097         case '-':
1098             {
1099                 int has_option;
1100                 /* option */
1101
1102                 c = *typestr++;
1103                 if (c == '\0')
1104                     goto bad_type;
1105                 while (isspace(*p))
1106                     p++;
1107                 has_option = 0;
1108                 if (*p == '-') {
1109                     p++;
1110                     if (*p != c) {
1111                         term_printf("%s: unsupported option -%c\n",
1112                                     cmdname, *p);
1113                         goto fail;
1114                     }
1115                     p++;
1116                     has_option = 1;
1117                 }
1118                 if (nb_args >= MAX_ARGS)
1119                     goto error_args;
1120                 args[nb_args++] = (void *)has_option;
1121             }
1122             break;
1123         default:
1124         bad_type:
1125             term_printf("%s: unknown type '%c'\n", cmdname, c);
1126             goto fail;
1127         }
1128     }
1129     /* check that all arguments were parsed */
1130     while (isspace(*p))
1131         p++;
1132     if (*p != '\0') {
1133         term_printf("%s: extraneous characters at the end of line\n",
1134                     cmdname);
1135         goto fail;
1136     }
1137
1138     switch(nb_args) {
1139     case 0:
1140         cmd->handler();
1141         break;
1142     case 1:
1143         cmd->handler(args[0]);
1144         break;
1145     case 2:
1146         cmd->handler(args[0], args[1]);
1147         break;
1148     case 3:
1149         cmd->handler(args[0], args[1], args[2]);
1150         break;
1151     case 4:
1152         cmd->handler(args[0], args[1], args[2], args[3]);
1153         break;
1154     case 5:
1155         cmd->handler(args[0], args[1], args[2], args[3], args[4]);
1156         break;
1157     default:
1158         term_printf("unsupported number of arguments: %d\n", nb_args);
1159         goto fail;
1160     }
1161  fail:
1162     for(i = 0; i < MAX_ARGS; i++)
1163         qemu_free(str_allocated[i]);
1164     return;
1165 }
1166
1167 static void term_show_prompt(void)
1168 {
1169     term_printf("(qemu) ");
1170     fflush(stdout);
1171     term_cmd_buf_index = 0;
1172     term_cmd_buf_size = 0;
1173     term_esc_state = IS_NORM;
1174 }
1175
1176 static void term_print_cmdline (const char *cmdline)
1177 {
1178     term_show_prompt();
1179     term_printf(cmdline);
1180     term_flush();
1181 }
1182
1183 static void term_insert_char(int ch)
1184 {
1185     if (term_cmd_buf_index < TERM_CMD_BUF_SIZE) {
1186         memmove(term_cmd_buf + term_cmd_buf_index + 1,
1187                 term_cmd_buf + term_cmd_buf_index,
1188                 term_cmd_buf_size - term_cmd_buf_index);
1189         term_cmd_buf[term_cmd_buf_index] = ch;
1190         term_cmd_buf_size++;
1191         term_printf("\033[@%c", ch);
1192         term_cmd_buf_index++;
1193         term_flush();
1194     }
1195 }
1196
1197 static void term_backward_char(void)
1198 {
1199     if (term_cmd_buf_index > 0) {
1200         term_cmd_buf_index--;
1201         term_printf("\033[D");
1202         term_flush();
1203     }
1204 }
1205
1206 static void term_forward_char(void)
1207 {
1208     if (term_cmd_buf_index < term_cmd_buf_size) {
1209         term_cmd_buf_index++;
1210         term_printf("\033[C");
1211         term_flush();
1212     }
1213 }
1214
1215 static void term_delete_char(void)
1216 {
1217     if (term_cmd_buf_index < term_cmd_buf_size) {
1218         memmove(term_cmd_buf + term_cmd_buf_index,
1219                 term_cmd_buf + term_cmd_buf_index + 1,
1220                 term_cmd_buf_size - term_cmd_buf_index - 1);
1221         term_printf("\033[P");
1222         term_cmd_buf_size--;
1223         term_flush();
1224     }
1225 }
1226
1227 static void term_backspace(void)
1228 {
1229     if (term_cmd_buf_index > 0) {
1230         term_backward_char();
1231         term_delete_char();
1232     }
1233 }
1234
1235 static void term_bol(void)
1236 {
1237     while (term_cmd_buf_index > 0)
1238         term_backward_char();
1239 }
1240
1241 static void term_eol(void)
1242 {
1243     while (term_cmd_buf_index < term_cmd_buf_size)
1244         term_forward_char();
1245 }
1246
1247 static void term_up_char(void)
1248 {
1249     int idx;
1250
1251     if (term_hist_entry == 0)
1252         return;
1253     if (term_hist_entry == -1) {
1254         /* Find latest entry */
1255         for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
1256             if (term_history[idx] == NULL)
1257                 break;
1258         }
1259         term_hist_entry = idx;
1260     }
1261     term_hist_entry--;
1262     if (term_hist_entry >= 0) {
1263         strcpy(term_cmd_buf, term_history[term_hist_entry]);
1264         term_printf("\n");
1265         term_print_cmdline(term_cmd_buf);
1266         term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
1267     }
1268 }
1269
1270 static void term_down_char(void)
1271 {
1272     if (term_hist_entry == TERM_MAX_CMDS - 1 || term_hist_entry == -1)
1273         return;
1274     if (term_history[++term_hist_entry] != NULL) {
1275         strcpy(term_cmd_buf, term_history[term_hist_entry]);
1276     } else {
1277         term_hist_entry = -1;
1278     }
1279     term_printf("\n");
1280     term_print_cmdline(term_cmd_buf);
1281     term_cmd_buf_index = term_cmd_buf_size = strlen(term_cmd_buf);
1282 }
1283
1284 static void term_hist_add(const char *cmdline)
1285 {
1286     char *hist_entry, *new_entry;
1287     int idx;
1288
1289     if (cmdline[0] == '\0')
1290         return;
1291     new_entry = NULL;
1292     if (term_hist_entry != -1) {
1293         /* We were editing an existing history entry: replace it */
1294         hist_entry = term_history[term_hist_entry];
1295         idx = term_hist_entry;
1296         if (strcmp(hist_entry, cmdline) == 0) {
1297             goto same_entry;
1298         }
1299     }
1300     /* Search cmdline in history buffers */
1301     for (idx = 0; idx < TERM_MAX_CMDS; idx++) {
1302         hist_entry = term_history[idx];
1303         if (hist_entry == NULL)
1304             break;
1305         if (strcmp(hist_entry, cmdline) == 0) {
1306         same_entry:
1307             new_entry = hist_entry;
1308             /* Put this entry at the end of history */
1309             memmove(&term_history[idx], &term_history[idx + 1],
1310                     &term_history[TERM_MAX_CMDS] - &term_history[idx + 1]);
1311             term_history[TERM_MAX_CMDS - 1] = NULL;
1312             for (; idx < TERM_MAX_CMDS; idx++) {
1313                 if (term_history[idx] == NULL)
1314                     break;
1315             }
1316             break;
1317         }
1318     }
1319     if (idx == TERM_MAX_CMDS) {
1320         /* Need to get one free slot */
1321         free(term_history[0]);
1322         memcpy(term_history, &term_history[1],
1323                &term_history[TERM_MAX_CMDS] - &term_history[1]);
1324         term_history[TERM_MAX_CMDS - 1] = NULL;
1325         idx = TERM_MAX_CMDS - 1;
1326     }
1327     if (new_entry == NULL)
1328         new_entry = strdup(cmdline);
1329     term_history[idx] = new_entry;
1330     term_hist_entry = -1;
1331 }
1332
1333 /* return true if command handled */
1334 static void term_handle_byte(int ch)
1335 {
1336     switch(term_esc_state) {
1337     case IS_NORM:
1338         switch(ch) {
1339         case 1:
1340             term_bol();
1341             break;
1342         case 5:
1343             term_eol();
1344             break;
1345         case 10:
1346         case 13:
1347             term_cmd_buf[term_cmd_buf_size] = '\0';
1348             term_hist_add(term_cmd_buf);
1349             term_printf("\n");
1350             term_handle_command(term_cmd_buf);
1351             term_show_prompt();
1352             break;
1353         case 27:
1354             term_esc_state = IS_ESC;
1355             break;
1356         case 127:
1357         case 8:
1358             term_backspace();
1359             break;
1360         case 155:
1361             term_esc_state = IS_CSI;
1362             break;
1363         default:
1364             if (ch >= 32) {
1365                 term_insert_char(ch);
1366             }
1367             break;
1368         }
1369         break;
1370     case IS_ESC:
1371         if (ch == '[') {
1372             term_esc_state = IS_CSI;
1373             term_esc_param = 0;
1374         } else {
1375             term_esc_state = IS_NORM;
1376         }
1377         break;
1378     case IS_CSI:
1379         switch(ch) {
1380         case 'A':
1381         case 'F':
1382             term_up_char();
1383             break;
1384         case 'B':
1385         case 'E':
1386             term_down_char();
1387             break;
1388         case 'D':
1389             term_backward_char();
1390             break;
1391         case 'C':
1392             term_forward_char();
1393             break;
1394         case '0' ... '9':
1395             term_esc_param = term_esc_param * 10 + (ch - '0');
1396             goto the_end;
1397         case '~':
1398             switch(term_esc_param) {
1399             case 1:
1400                 term_bol();
1401                 break;
1402             case 3:
1403                 term_delete_char();
1404                 break;
1405             case 4:
1406                 term_eol();
1407                 break;
1408             }
1409             break;
1410         default:
1411             break;
1412         }
1413         term_esc_state = IS_NORM;
1414     the_end:
1415         break;
1416     }
1417 }
1418
1419 /*************************************************************/
1420 /* serial console support */
1421
1422 #define TERM_ESCAPE 0x01 /* ctrl-a is used for escape */
1423
1424 static int term_got_escape, term_command;
1425
1426 void term_print_help(void)
1427 {
1428     term_printf("\n"
1429                 "C-a h    print this help\n"
1430                 "C-a x    exit emulatior\n"
1431                 "C-a s    save disk data back to file (if -snapshot)\n"
1432                 "C-a b    send break (magic sysrq)\n"
1433                 "C-a c    switch between console and monitor\n"
1434                 "C-a C-a  send C-a\n"
1435                 );
1436 }
1437
1438 /* called when a char is received */
1439 static void term_received_byte(int ch)
1440 {
1441     if (!serial_console) {
1442         /* if no serial console, handle every command */
1443         term_handle_byte(ch);
1444     } else {
1445         if (term_got_escape) {
1446             term_got_escape = 0;
1447             switch(ch) {
1448             case 'h':
1449                 term_print_help();
1450                 break;
1451             case 'x':
1452                 exit(0);
1453                 break;
1454             case 's':
1455                 {
1456                     int i;
1457                     for (i = 0; i < MAX_DISKS; i++) {
1458                         if (bs_table[i])
1459                             bdrv_commit(bs_table[i]);
1460                     }
1461                 }
1462                 break;
1463             case 'b':
1464                 if (serial_console)
1465                     serial_receive_break(serial_console);
1466                 break;
1467             case 'c':
1468                 if (!term_command) {
1469                     term_show_prompt();
1470                     term_command = 1;
1471                 } else {
1472                     term_command = 0;
1473                 }
1474                 break;
1475             case TERM_ESCAPE:
1476                 goto send_char;
1477             }
1478         } else if (ch == TERM_ESCAPE) {
1479             term_got_escape = 1;
1480         } else {
1481         send_char:
1482             if (term_command) {
1483                 term_handle_byte(ch);
1484             } else {
1485                 if (serial_console)
1486                     serial_receive_byte(serial_console, ch);
1487             }
1488         }
1489     }
1490 }
1491
1492 static int term_can_read(void *opaque)
1493 {
1494     if (serial_console) {
1495         return serial_can_receive(serial_console);
1496     } else {
1497         return 128;
1498     }
1499 }
1500
1501 static void term_read(void *opaque, const uint8_t *buf, int size)
1502 {
1503     int i;
1504     for(i = 0; i < size; i++)
1505         term_received_byte(buf[i]);
1506 }
1507
1508 void monitor_init(void)
1509 {
1510     if (!serial_console) {
1511         term_printf("QEMU %s monitor - type 'help' for more information\n",
1512                     QEMU_VERSION);
1513         term_show_prompt();
1514     }
1515     term_hist_entry = -1;
1516     qemu_add_fd_read_handler(0, term_can_read, term_read, NULL);
1517 }