1 /* 2 * qemu bsd user main 3 * 4 * Copyright (c) 2003-2008 Fabrice Bellard 5 * Copyright (c) 2013-14 Stacey Son 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * This program is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, see <http://www.gnu.org/licenses/>. 19 */ 20 21 #include <sys/types.h> 22 #include <sys/time.h> 23 #include <sys/resource.h> 24 #include <sys/sysctl.h> 25 26 #include "qemu/osdep.h" 27 #include "qemu-common.h" 28 #include "qemu/units.h" 29 #include "qemu/accel.h" 30 #include "sysemu/tcg.h" 31 #include "qemu-version.h" 32 #include <machine/trap.h> 33 34 #include "qapi/error.h" 35 #include "qemu.h" 36 #include "qemu/config-file.h" 37 #include "qemu/error-report.h" 38 #include "qemu/path.h" 39 #include "qemu/help_option.h" 40 #include "qemu/module.h" 41 #include "exec/exec-all.h" 42 #include "tcg/tcg.h" 43 #include "qemu/timer.h" 44 #include "qemu/envlist.h" 45 #include "qemu/cutils.h" 46 #include "exec/log.h" 47 #include "trace/control.h" 48 49 #include "host-os.h" 50 #include "target_arch_cpu.h" 51 52 int singlestep; 53 unsigned long mmap_min_addr; 54 uintptr_t guest_base; 55 bool have_guest_base; 56 unsigned long reserved_va; 57 58 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; 59 const char *qemu_uname_release; 60 enum BSDType bsd_type; 61 char qemu_proc_pathname[PATH_MAX]; /* full path to exeutable */ 62 63 unsigned long target_maxtsiz = TARGET_MAXTSIZ; /* max text size */ 64 unsigned long target_dfldsiz = TARGET_DFLDSIZ; /* initial data size limit */ 65 unsigned long target_maxdsiz = TARGET_MAXDSIZ; /* max data size */ 66 unsigned long target_dflssiz = TARGET_DFLSSIZ; /* initial data size limit */ 67 unsigned long target_maxssiz = TARGET_MAXSSIZ; /* max stack size */ 68 unsigned long target_sgrowsiz = TARGET_SGROWSIZ; /* amount to grow stack */ 69 70 void gemu_log(const char *fmt, ...) 71 { 72 va_list ap; 73 74 va_start(ap, fmt); 75 vfprintf(stderr, fmt, ap); 76 va_end(ap); 77 } 78 79 void fork_start(void) 80 { 81 } 82 83 void fork_end(int child) 84 { 85 if (child) { 86 gdbserver_fork(thread_cpu); 87 } 88 } 89 90 void cpu_loop(CPUArchState *env) 91 { 92 target_cpu_loop(env); 93 } 94 95 static void usage(void) 96 { 97 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION 98 "\n" QEMU_COPYRIGHT "\n" 99 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" 100 "BSD CPU emulator (compiled for %s emulation)\n" 101 "\n" 102 "Standard options:\n" 103 "-h print this help\n" 104 "-g port wait gdb connection to port\n" 105 "-L path set the elf interpreter prefix (default=%s)\n" 106 "-s size set the stack size in bytes (default=%ld)\n" 107 "-cpu model select CPU (-cpu help for list)\n" 108 "-drop-ld-preload drop LD_PRELOAD for target process\n" 109 "-E var=value sets/modifies targets environment variable(s)\n" 110 "-U var unsets targets environment variable(s)\n" 111 "-B address set guest_base address to address\n" 112 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n" 113 "\n" 114 "Debug options:\n" 115 "-d item1[,...] enable logging of specified items\n" 116 " (use '-d help' for a list of log items)\n" 117 "-D logfile write logs to 'logfile' (default stderr)\n" 118 "-singlestep always run in singlestep mode\n" 119 "-strace log system calls\n" 120 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" 121 " specify tracing options\n" 122 "\n" 123 "Environment variables:\n" 124 "QEMU_STRACE Print system calls and arguments similar to the\n" 125 " 'strace' program. Enable by setting to any value.\n" 126 "You can use -E and -U options to set/unset environment variables\n" 127 "for target process. It is possible to provide several variables\n" 128 "by repeating the option. For example:\n" 129 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" 130 "Note that if you provide several changes to single variable\n" 131 "last change will stay in effect.\n" 132 "\n" 133 QEMU_HELP_BOTTOM "\n" 134 , 135 TARGET_NAME, 136 interp_prefix, 137 target_dflssiz); 138 exit(1); 139 } 140 141 __thread CPUState *thread_cpu; 142 143 bool qemu_cpu_is_self(CPUState *cpu) 144 { 145 return thread_cpu == cpu; 146 } 147 148 void qemu_cpu_kick(CPUState *cpu) 149 { 150 cpu_exit(cpu); 151 } 152 153 /* Assumes contents are already zeroed. */ 154 void init_task_state(TaskState *ts) 155 { 156 int i; 157 158 ts->used = 1; 159 ts->first_free = ts->sigqueue_table; 160 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) { 161 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1]; 162 } 163 ts->sigqueue_table[i].next = NULL; 164 } 165 166 static void 167 adjust_ssize(void) 168 { 169 struct rlimit rl; 170 171 if (getrlimit(RLIMIT_STACK, &rl) != 0) { 172 return; 173 } 174 175 target_maxssiz = MIN(target_maxssiz, rl.rlim_max); 176 target_dflssiz = MIN(MAX(target_dflssiz, rl.rlim_cur), target_maxssiz); 177 178 rl.rlim_max = target_maxssiz; 179 rl.rlim_cur = target_dflssiz; 180 setrlimit(RLIMIT_STACK, &rl); 181 } 182 183 static void save_proc_pathname(char *argv0) 184 { 185 int mib[4]; 186 size_t len; 187 188 mib[0] = CTL_KERN; 189 mib[1] = KERN_PROC; 190 mib[2] = KERN_PROC_PATHNAME; 191 mib[3] = -1; 192 193 len = sizeof(qemu_proc_pathname); 194 if (sysctl(mib, 4, qemu_proc_pathname, &len, NULL, 0)) { 195 perror("sysctl"); 196 } 197 } 198 199 int main(int argc, char **argv) 200 { 201 const char *filename; 202 const char *cpu_model; 203 const char *cpu_type; 204 const char *log_file = NULL; 205 const char *log_mask = NULL; 206 struct target_pt_regs regs1, *regs = ®s1; 207 struct image_info info1, *info = &info1; 208 struct bsd_binprm bprm; 209 TaskState *ts; 210 CPUArchState *env; 211 CPUState *cpu; 212 int optind, rv; 213 const char *r; 214 const char *gdbstub = NULL; 215 char **target_environ, **wrk; 216 envlist_t *envlist = NULL; 217 bsd_type = HOST_DEFAULT_BSD_TYPE; 218 219 adjust_ssize(); 220 221 if (argc <= 1) { 222 usage(); 223 } 224 225 save_proc_pathname(argv[0]); 226 227 error_init(argv[0]); 228 module_call_init(MODULE_INIT_TRACE); 229 qemu_init_cpu_list(); 230 module_call_init(MODULE_INIT_QOM); 231 232 envlist = envlist_create(); 233 234 /* add current environment into the list */ 235 for (wrk = environ; *wrk != NULL; wrk++) { 236 (void) envlist_setenv(envlist, *wrk); 237 } 238 239 cpu_model = NULL; 240 241 qemu_add_opts(&qemu_trace_opts); 242 243 optind = 1; 244 for (;;) { 245 if (optind >= argc) { 246 break; 247 } 248 r = argv[optind]; 249 if (r[0] != '-') { 250 break; 251 } 252 optind++; 253 r++; 254 if (!strcmp(r, "-")) { 255 break; 256 } else if (!strcmp(r, "d")) { 257 if (optind >= argc) { 258 break; 259 } 260 log_mask = argv[optind++]; 261 } else if (!strcmp(r, "D")) { 262 if (optind >= argc) { 263 break; 264 } 265 log_file = argv[optind++]; 266 } else if (!strcmp(r, "E")) { 267 r = argv[optind++]; 268 if (envlist_setenv(envlist, r) != 0) { 269 usage(); 270 } 271 } else if (!strcmp(r, "ignore-environment")) { 272 envlist_free(envlist); 273 envlist = envlist_create(); 274 } else if (!strcmp(r, "U")) { 275 r = argv[optind++]; 276 if (envlist_unsetenv(envlist, r) != 0) { 277 usage(); 278 } 279 } else if (!strcmp(r, "s")) { 280 r = argv[optind++]; 281 rv = qemu_strtoul(r, &r, 0, &target_dflssiz); 282 if (rv < 0 || target_dflssiz <= 0) { 283 usage(); 284 } 285 if (*r == 'M') { 286 target_dflssiz *= 1024 * 1024; 287 } else if (*r == 'k' || *r == 'K') { 288 target_dflssiz *= 1024; 289 } 290 if (target_dflssiz > target_maxssiz) { 291 usage(); 292 } 293 } else if (!strcmp(r, "L")) { 294 interp_prefix = argv[optind++]; 295 } else if (!strcmp(r, "p")) { 296 qemu_host_page_size = atoi(argv[optind++]); 297 if (qemu_host_page_size == 0 || 298 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { 299 fprintf(stderr, "page size must be a power of two\n"); 300 exit(1); 301 } 302 } else if (!strcmp(r, "g")) { 303 gdbstub = g_strdup(argv[optind++]); 304 } else if (!strcmp(r, "r")) { 305 qemu_uname_release = argv[optind++]; 306 } else if (!strcmp(r, "cpu")) { 307 cpu_model = argv[optind++]; 308 if (is_help_option(cpu_model)) { 309 /* XXX: implement xxx_cpu_list for targets that still miss it */ 310 #if defined(cpu_list) 311 cpu_list(); 312 #endif 313 exit(1); 314 } 315 } else if (!strcmp(r, "B")) { 316 rv = qemu_strtoul(argv[optind++], NULL, 0, &guest_base); 317 if (rv < 0) { 318 usage(); 319 } 320 have_guest_base = true; 321 } else if (!strcmp(r, "drop-ld-preload")) { 322 (void) envlist_unsetenv(envlist, "LD_PRELOAD"); 323 } else if (!strcmp(r, "bsd")) { 324 if (!strcasecmp(argv[optind], "freebsd")) { 325 bsd_type = target_freebsd; 326 } else if (!strcasecmp(argv[optind], "netbsd")) { 327 bsd_type = target_netbsd; 328 } else if (!strcasecmp(argv[optind], "openbsd")) { 329 bsd_type = target_openbsd; 330 } else { 331 usage(); 332 } 333 optind++; 334 } else if (!strcmp(r, "singlestep")) { 335 singlestep = 1; 336 } else if (!strcmp(r, "strace")) { 337 do_strace = 1; 338 } else if (!strcmp(r, "trace")) { 339 trace_opt_parse(optarg); 340 } else { 341 usage(); 342 } 343 } 344 345 /* init debug */ 346 qemu_log_needs_buffers(); 347 qemu_set_log_filename(log_file, &error_fatal); 348 if (log_mask) { 349 int mask; 350 351 mask = qemu_str_to_log_mask(log_mask); 352 if (!mask) { 353 qemu_print_log_usage(stdout); 354 exit(1); 355 } 356 qemu_set_log(mask); 357 } 358 359 if (optind >= argc) { 360 usage(); 361 } 362 filename = argv[optind]; 363 364 if (!trace_init_backends()) { 365 exit(1); 366 } 367 trace_init_file(); 368 369 /* Zero out regs */ 370 memset(regs, 0, sizeof(struct target_pt_regs)); 371 372 /* Zero bsd params */ 373 memset(&bprm, 0, sizeof(bprm)); 374 375 /* Zero out image_info */ 376 memset(info, 0, sizeof(struct image_info)); 377 378 /* Scan interp_prefix dir for replacement files. */ 379 init_paths(interp_prefix); 380 381 if (cpu_model == NULL) { 382 cpu_model = TARGET_DEFAULT_CPU_MODEL; 383 } 384 385 cpu_type = parse_cpu_option(cpu_model); 386 387 /* init tcg before creating CPUs and to get qemu_host_page_size */ 388 { 389 AccelClass *ac = ACCEL_GET_CLASS(current_accel()); 390 391 accel_init_interfaces(ac); 392 ac->init_machine(NULL); 393 } 394 cpu = cpu_create(cpu_type); 395 env = cpu->env_ptr; 396 cpu_reset(cpu); 397 thread_cpu = cpu; 398 399 if (getenv("QEMU_STRACE")) { 400 do_strace = 1; 401 } 402 403 target_environ = envlist_to_environ(envlist, NULL); 404 envlist_free(envlist); 405 406 /* 407 * Now that page sizes are configured we can do 408 * proper page alignment for guest_base. 409 */ 410 guest_base = HOST_PAGE_ALIGN(guest_base); 411 412 if (loader_exec(filename, argv + optind, target_environ, regs, info, 413 &bprm) != 0) { 414 printf("Error loading %s\n", filename); 415 _exit(1); 416 } 417 418 for (wrk = target_environ; *wrk; wrk++) { 419 g_free(*wrk); 420 } 421 422 g_free(target_environ); 423 424 if (qemu_loglevel_mask(CPU_LOG_PAGE)) { 425 qemu_log("guest_base %p\n", (void *)guest_base); 426 log_page_dump("binary load"); 427 428 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); 429 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); 430 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", 431 info->start_code); 432 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", 433 info->start_data); 434 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); 435 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", 436 info->start_stack); 437 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); 438 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); 439 } 440 441 /* build Task State */ 442 ts = g_new0(TaskState, 1); 443 init_task_state(ts); 444 ts->info = info; 445 ts->bprm = &bprm; 446 cpu->opaque = ts; 447 448 target_set_brk(info->brk); 449 syscall_init(); 450 signal_init(); 451 452 /* 453 * Now that we've loaded the binary, GUEST_BASE is fixed. Delay 454 * generating the prologue until now so that the prologue can take 455 * the real value of GUEST_BASE into account. 456 */ 457 tcg_prologue_init(tcg_ctx); 458 459 target_cpu_init(env, regs); 460 461 if (gdbstub) { 462 gdbserver_start(gdbstub); 463 gdb_handlesig(cpu, 0); 464 } 465 cpu_loop(env); 466 /* never exits */ 467 return 0; 468 } 469