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1 | /* | |
2 | * qemu user main | |
3 | * | |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include "qemu/osdep.h" | |
21 | #include "qemu-common.h" | |
22 | #include "qemu/units.h" | |
23 | #include "sysemu/tcg.h" | |
24 | #include "qemu-version.h" | |
25 | #include <sys/syscall.h> | |
26 | #include <sys/resource.h> | |
27 | ||
28 | #include "qapi/error.h" | |
29 | #include "qemu.h" | |
30 | #include "qemu/path.h" | |
31 | #include "qemu/queue.h" | |
32 | #include "qemu/config-file.h" | |
33 | #include "qemu/cutils.h" | |
34 | #include "qemu/error-report.h" | |
35 | #include "qemu/help_option.h" | |
36 | #include "qemu/module.h" | |
37 | #include "qemu/plugin.h" | |
38 | #include "cpu.h" | |
39 | #include "exec/exec-all.h" | |
40 | #include "tcg.h" | |
41 | #include "qemu/timer.h" | |
42 | #include "qemu/envlist.h" | |
43 | #include "qemu/guest-random.h" | |
44 | #include "elf.h" | |
45 | #include "trace/control.h" | |
46 | #include "target_elf.h" | |
47 | #include "cpu_loop-common.h" | |
48 | #include "crypto/init.h" | |
49 | ||
50 | char *exec_path; | |
51 | ||
52 | int singlestep; | |
53 | static const char *argv0; | |
54 | static int gdbstub_port; | |
55 | static envlist_t *envlist; | |
56 | static const char *cpu_model; | |
57 | static const char *cpu_type; | |
58 | static const char *seed_optarg; | |
59 | unsigned long mmap_min_addr; | |
60 | unsigned long guest_base; | |
61 | int have_guest_base; | |
62 | ||
63 | /* | |
64 | * When running 32-on-64 we should make sure we can fit all of the possible | |
65 | * guest address space into a contiguous chunk of virtual host memory. | |
66 | * | |
67 | * This way we will never overlap with our own libraries or binaries or stack | |
68 | * or anything else that QEMU maps. | |
69 | * | |
70 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
71 | * of the address for the kernel. Some cpus rely on this and user space | |
72 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
73 | * must preserve the expected address space. | |
74 | */ | |
75 | #ifndef MAX_RESERVED_VA | |
76 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
77 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
78 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
79 | /* There are a number of places where we assign reserved_va to a variable | |
80 | of type abi_ulong and expect it to fit. Avoid the last page. */ | |
81 | # define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK) | |
82 | # else | |
83 | # define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS) | |
84 | # endif | |
85 | # else | |
86 | # define MAX_RESERVED_VA(CPU) 0 | |
87 | # endif | |
88 | #endif | |
89 | ||
90 | unsigned long reserved_va; | |
91 | ||
92 | static void usage(int exitcode); | |
93 | ||
94 | static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; | |
95 | const char *qemu_uname_release; | |
96 | ||
97 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so | |
98 | we allocate a bigger stack. Need a better solution, for example | |
99 | by remapping the process stack directly at the right place */ | |
100 | unsigned long guest_stack_size = 8 * 1024 * 1024UL; | |
101 | ||
102 | void gemu_log(const char *fmt, ...) | |
103 | { | |
104 | va_list ap; | |
105 | ||
106 | va_start(ap, fmt); | |
107 | vfprintf(stderr, fmt, ap); | |
108 | va_end(ap); | |
109 | } | |
110 | ||
111 | #if defined(TARGET_I386) | |
112 | int cpu_get_pic_interrupt(CPUX86State *env) | |
113 | { | |
114 | return -1; | |
115 | } | |
116 | #endif | |
117 | ||
118 | /***********************************************************/ | |
119 | /* Helper routines for implementing atomic operations. */ | |
120 | ||
121 | /* Make sure everything is in a consistent state for calling fork(). */ | |
122 | void fork_start(void) | |
123 | { | |
124 | start_exclusive(); | |
125 | mmap_fork_start(); | |
126 | cpu_list_lock(); | |
127 | } | |
128 | ||
129 | void fork_end(int child) | |
130 | { | |
131 | mmap_fork_end(child); | |
132 | if (child) { | |
133 | CPUState *cpu, *next_cpu; | |
134 | /* Child processes created by fork() only have a single thread. | |
135 | Discard information about the parent threads. */ | |
136 | CPU_FOREACH_SAFE(cpu, next_cpu) { | |
137 | if (cpu != thread_cpu) { | |
138 | QTAILQ_REMOVE_RCU(&cpus, cpu, node); | |
139 | } | |
140 | } | |
141 | qemu_init_cpu_list(); | |
142 | gdbserver_fork(thread_cpu); | |
143 | /* qemu_init_cpu_list() takes care of reinitializing the | |
144 | * exclusive state, so we don't need to end_exclusive() here. | |
145 | */ | |
146 | } else { | |
147 | cpu_list_unlock(); | |
148 | end_exclusive(); | |
149 | } | |
150 | } | |
151 | ||
152 | __thread CPUState *thread_cpu; | |
153 | ||
154 | bool qemu_cpu_is_self(CPUState *cpu) | |
155 | { | |
156 | return thread_cpu == cpu; | |
157 | } | |
158 | ||
159 | void qemu_cpu_kick(CPUState *cpu) | |
160 | { | |
161 | cpu_exit(cpu); | |
162 | } | |
163 | ||
164 | void task_settid(TaskState *ts) | |
165 | { | |
166 | if (ts->ts_tid == 0) { | |
167 | ts->ts_tid = (pid_t)syscall(SYS_gettid); | |
168 | } | |
169 | } | |
170 | ||
171 | void stop_all_tasks(void) | |
172 | { | |
173 | /* | |
174 | * We trust that when using NPTL, start_exclusive() | |
175 | * handles thread stopping correctly. | |
176 | */ | |
177 | start_exclusive(); | |
178 | } | |
179 | ||
180 | /* Assumes contents are already zeroed. */ | |
181 | void init_task_state(TaskState *ts) | |
182 | { | |
183 | ts->used = 1; | |
184 | ts->sigaltstack_used = (struct target_sigaltstack) { | |
185 | .ss_sp = 0, | |
186 | .ss_size = 0, | |
187 | .ss_flags = TARGET_SS_DISABLE, | |
188 | }; | |
189 | } | |
190 | ||
191 | CPUArchState *cpu_copy(CPUArchState *env) | |
192 | { | |
193 | CPUState *cpu = env_cpu(env); | |
194 | CPUState *new_cpu = cpu_create(cpu_type); | |
195 | CPUArchState *new_env = new_cpu->env_ptr; | |
196 | CPUBreakpoint *bp; | |
197 | CPUWatchpoint *wp; | |
198 | ||
199 | /* Reset non arch specific state */ | |
200 | cpu_reset(new_cpu); | |
201 | ||
202 | memcpy(new_env, env, sizeof(CPUArchState)); | |
203 | ||
204 | /* Clone all break/watchpoints. | |
205 | Note: Once we support ptrace with hw-debug register access, make sure | |
206 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
207 | QTAILQ_INIT(&new_cpu->breakpoints); | |
208 | QTAILQ_INIT(&new_cpu->watchpoints); | |
209 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { | |
210 | cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); | |
211 | } | |
212 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { | |
213 | cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); | |
214 | } | |
215 | ||
216 | return new_env; | |
217 | } | |
218 | ||
219 | static void handle_arg_help(const char *arg) | |
220 | { | |
221 | usage(EXIT_SUCCESS); | |
222 | } | |
223 | ||
224 | static void handle_arg_log(const char *arg) | |
225 | { | |
226 | int mask; | |
227 | ||
228 | mask = qemu_str_to_log_mask(arg); | |
229 | if (!mask) { | |
230 | qemu_print_log_usage(stdout); | |
231 | exit(EXIT_FAILURE); | |
232 | } | |
233 | qemu_log_needs_buffers(); | |
234 | qemu_set_log(mask); | |
235 | } | |
236 | ||
237 | static void handle_arg_dfilter(const char *arg) | |
238 | { | |
239 | qemu_set_dfilter_ranges(arg, &error_fatal); | |
240 | } | |
241 | ||
242 | static void handle_arg_log_filename(const char *arg) | |
243 | { | |
244 | qemu_set_log_filename(arg, &error_fatal); | |
245 | } | |
246 | ||
247 | static void handle_arg_set_env(const char *arg) | |
248 | { | |
249 | char *r, *p, *token; | |
250 | r = p = strdup(arg); | |
251 | while ((token = strsep(&p, ",")) != NULL) { | |
252 | if (envlist_setenv(envlist, token) != 0) { | |
253 | usage(EXIT_FAILURE); | |
254 | } | |
255 | } | |
256 | free(r); | |
257 | } | |
258 | ||
259 | static void handle_arg_unset_env(const char *arg) | |
260 | { | |
261 | char *r, *p, *token; | |
262 | r = p = strdup(arg); | |
263 | while ((token = strsep(&p, ",")) != NULL) { | |
264 | if (envlist_unsetenv(envlist, token) != 0) { | |
265 | usage(EXIT_FAILURE); | |
266 | } | |
267 | } | |
268 | free(r); | |
269 | } | |
270 | ||
271 | static void handle_arg_argv0(const char *arg) | |
272 | { | |
273 | argv0 = strdup(arg); | |
274 | } | |
275 | ||
276 | static void handle_arg_stack_size(const char *arg) | |
277 | { | |
278 | char *p; | |
279 | guest_stack_size = strtoul(arg, &p, 0); | |
280 | if (guest_stack_size == 0) { | |
281 | usage(EXIT_FAILURE); | |
282 | } | |
283 | ||
284 | if (*p == 'M') { | |
285 | guest_stack_size *= MiB; | |
286 | } else if (*p == 'k' || *p == 'K') { | |
287 | guest_stack_size *= KiB; | |
288 | } | |
289 | } | |
290 | ||
291 | static void handle_arg_ld_prefix(const char *arg) | |
292 | { | |
293 | interp_prefix = strdup(arg); | |
294 | } | |
295 | ||
296 | static void handle_arg_pagesize(const char *arg) | |
297 | { | |
298 | qemu_host_page_size = atoi(arg); | |
299 | if (qemu_host_page_size == 0 || | |
300 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
301 | fprintf(stderr, "page size must be a power of two\n"); | |
302 | exit(EXIT_FAILURE); | |
303 | } | |
304 | } | |
305 | ||
306 | static void handle_arg_seed(const char *arg) | |
307 | { | |
308 | seed_optarg = arg; | |
309 | } | |
310 | ||
311 | static void handle_arg_gdb(const char *arg) | |
312 | { | |
313 | gdbstub_port = atoi(arg); | |
314 | } | |
315 | ||
316 | static void handle_arg_uname(const char *arg) | |
317 | { | |
318 | qemu_uname_release = strdup(arg); | |
319 | } | |
320 | ||
321 | static void handle_arg_cpu(const char *arg) | |
322 | { | |
323 | cpu_model = strdup(arg); | |
324 | if (cpu_model == NULL || is_help_option(cpu_model)) { | |
325 | /* XXX: implement xxx_cpu_list for targets that still miss it */ | |
326 | #if defined(cpu_list) | |
327 | cpu_list(); | |
328 | #endif | |
329 | exit(EXIT_FAILURE); | |
330 | } | |
331 | } | |
332 | ||
333 | static void handle_arg_guest_base(const char *arg) | |
334 | { | |
335 | guest_base = strtol(arg, NULL, 0); | |
336 | have_guest_base = 1; | |
337 | } | |
338 | ||
339 | static void handle_arg_reserved_va(const char *arg) | |
340 | { | |
341 | char *p; | |
342 | int shift = 0; | |
343 | reserved_va = strtoul(arg, &p, 0); | |
344 | switch (*p) { | |
345 | case 'k': | |
346 | case 'K': | |
347 | shift = 10; | |
348 | break; | |
349 | case 'M': | |
350 | shift = 20; | |
351 | break; | |
352 | case 'G': | |
353 | shift = 30; | |
354 | break; | |
355 | } | |
356 | if (shift) { | |
357 | unsigned long unshifted = reserved_va; | |
358 | p++; | |
359 | reserved_va <<= shift; | |
360 | if (reserved_va >> shift != unshifted) { | |
361 | fprintf(stderr, "Reserved virtual address too big\n"); | |
362 | exit(EXIT_FAILURE); | |
363 | } | |
364 | } | |
365 | if (*p) { | |
366 | fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); | |
367 | exit(EXIT_FAILURE); | |
368 | } | |
369 | } | |
370 | ||
371 | static void handle_arg_singlestep(const char *arg) | |
372 | { | |
373 | singlestep = 1; | |
374 | } | |
375 | ||
376 | static void handle_arg_strace(const char *arg) | |
377 | { | |
378 | do_strace = 1; | |
379 | } | |
380 | ||
381 | static void handle_arg_version(const char *arg) | |
382 | { | |
383 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION | |
384 | "\n" QEMU_COPYRIGHT "\n"); | |
385 | exit(EXIT_SUCCESS); | |
386 | } | |
387 | ||
388 | static char *trace_file; | |
389 | static void handle_arg_trace(const char *arg) | |
390 | { | |
391 | g_free(trace_file); | |
392 | trace_file = trace_opt_parse(arg); | |
393 | } | |
394 | ||
395 | #if defined(TARGET_XTENSA) | |
396 | static void handle_arg_abi_call0(const char *arg) | |
397 | { | |
398 | xtensa_set_abi_call0(); | |
399 | } | |
400 | #endif | |
401 | ||
402 | static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins); | |
403 | ||
404 | #ifdef CONFIG_PLUGIN | |
405 | static void handle_arg_plugin(const char *arg) | |
406 | { | |
407 | qemu_plugin_opt_parse(arg, &plugins); | |
408 | } | |
409 | #endif | |
410 | ||
411 | struct qemu_argument { | |
412 | const char *argv; | |
413 | const char *env; | |
414 | bool has_arg; | |
415 | void (*handle_opt)(const char *arg); | |
416 | const char *example; | |
417 | const char *help; | |
418 | }; | |
419 | ||
420 | static const struct qemu_argument arg_table[] = { | |
421 | {"h", "", false, handle_arg_help, | |
422 | "", "print this help"}, | |
423 | {"help", "", false, handle_arg_help, | |
424 | "", ""}, | |
425 | {"g", "QEMU_GDB", true, handle_arg_gdb, | |
426 | "port", "wait gdb connection to 'port'"}, | |
427 | {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, | |
428 | "path", "set the elf interpreter prefix to 'path'"}, | |
429 | {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, | |
430 | "size", "set the stack size to 'size' bytes"}, | |
431 | {"cpu", "QEMU_CPU", true, handle_arg_cpu, | |
432 | "model", "select CPU (-cpu help for list)"}, | |
433 | {"E", "QEMU_SET_ENV", true, handle_arg_set_env, | |
434 | "var=value", "sets targets environment variable (see below)"}, | |
435 | {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, | |
436 | "var", "unsets targets environment variable (see below)"}, | |
437 | {"0", "QEMU_ARGV0", true, handle_arg_argv0, | |
438 | "argv0", "forces target process argv[0] to be 'argv0'"}, | |
439 | {"r", "QEMU_UNAME", true, handle_arg_uname, | |
440 | "uname", "set qemu uname release string to 'uname'"}, | |
441 | {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, | |
442 | "address", "set guest_base address to 'address'"}, | |
443 | {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, | |
444 | "size", "reserve 'size' bytes for guest virtual address space"}, | |
445 | {"d", "QEMU_LOG", true, handle_arg_log, | |
446 | "item[,...]", "enable logging of specified items " | |
447 | "(use '-d help' for a list of items)"}, | |
448 | {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, | |
449 | "range[,...]","filter logging based on address range"}, | |
450 | {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, | |
451 | "logfile", "write logs to 'logfile' (default stderr)"}, | |
452 | {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, | |
453 | "pagesize", "set the host page size to 'pagesize'"}, | |
454 | {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, | |
455 | "", "run in singlestep mode"}, | |
456 | {"strace", "QEMU_STRACE", false, handle_arg_strace, | |
457 | "", "log system calls"}, | |
458 | {"seed", "QEMU_RAND_SEED", true, handle_arg_seed, | |
459 | "", "Seed for pseudo-random number generator"}, | |
460 | {"trace", "QEMU_TRACE", true, handle_arg_trace, | |
461 | "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, | |
462 | #ifdef CONFIG_PLUGIN | |
463 | {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin, | |
464 | "", "[file=]<file>[,arg=<string>]"}, | |
465 | #endif | |
466 | {"version", "QEMU_VERSION", false, handle_arg_version, | |
467 | "", "display version information and exit"}, | |
468 | #if defined(TARGET_XTENSA) | |
469 | {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0, | |
470 | "", "assume CALL0 Xtensa ABI"}, | |
471 | #endif | |
472 | {NULL, NULL, false, NULL, NULL, NULL} | |
473 | }; | |
474 | ||
475 | static void usage(int exitcode) | |
476 | { | |
477 | const struct qemu_argument *arginfo; | |
478 | int maxarglen; | |
479 | int maxenvlen; | |
480 | ||
481 | printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" | |
482 | "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" | |
483 | "\n" | |
484 | "Options and associated environment variables:\n" | |
485 | "\n"); | |
486 | ||
487 | /* Calculate column widths. We must always have at least enough space | |
488 | * for the column header. | |
489 | */ | |
490 | maxarglen = strlen("Argument"); | |
491 | maxenvlen = strlen("Env-variable"); | |
492 | ||
493 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
494 | int arglen = strlen(arginfo->argv); | |
495 | if (arginfo->has_arg) { | |
496 | arglen += strlen(arginfo->example) + 1; | |
497 | } | |
498 | if (strlen(arginfo->env) > maxenvlen) { | |
499 | maxenvlen = strlen(arginfo->env); | |
500 | } | |
501 | if (arglen > maxarglen) { | |
502 | maxarglen = arglen; | |
503 | } | |
504 | } | |
505 | ||
506 | printf("%-*s %-*s Description\n", maxarglen+1, "Argument", | |
507 | maxenvlen, "Env-variable"); | |
508 | ||
509 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
510 | if (arginfo->has_arg) { | |
511 | printf("-%s %-*s %-*s %s\n", arginfo->argv, | |
512 | (int)(maxarglen - strlen(arginfo->argv) - 1), | |
513 | arginfo->example, maxenvlen, arginfo->env, arginfo->help); | |
514 | } else { | |
515 | printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, | |
516 | maxenvlen, arginfo->env, | |
517 | arginfo->help); | |
518 | } | |
519 | } | |
520 | ||
521 | printf("\n" | |
522 | "Defaults:\n" | |
523 | "QEMU_LD_PREFIX = %s\n" | |
524 | "QEMU_STACK_SIZE = %ld byte\n", | |
525 | interp_prefix, | |
526 | guest_stack_size); | |
527 | ||
528 | printf("\n" | |
529 | "You can use -E and -U options or the QEMU_SET_ENV and\n" | |
530 | "QEMU_UNSET_ENV environment variables to set and unset\n" | |
531 | "environment variables for the target process.\n" | |
532 | "It is possible to provide several variables by separating them\n" | |
533 | "by commas in getsubopt(3) style. Additionally it is possible to\n" | |
534 | "provide the -E and -U options multiple times.\n" | |
535 | "The following lines are equivalent:\n" | |
536 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
537 | " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" | |
538 | " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" | |
539 | "Note that if you provide several changes to a single variable\n" | |
540 | "the last change will stay in effect.\n" | |
541 | "\n" | |
542 | QEMU_HELP_BOTTOM "\n"); | |
543 | ||
544 | exit(exitcode); | |
545 | } | |
546 | ||
547 | static int parse_args(int argc, char **argv) | |
548 | { | |
549 | const char *r; | |
550 | int optind; | |
551 | const struct qemu_argument *arginfo; | |
552 | ||
553 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
554 | if (arginfo->env == NULL) { | |
555 | continue; | |
556 | } | |
557 | ||
558 | r = getenv(arginfo->env); | |
559 | if (r != NULL) { | |
560 | arginfo->handle_opt(r); | |
561 | } | |
562 | } | |
563 | ||
564 | optind = 1; | |
565 | for (;;) { | |
566 | if (optind >= argc) { | |
567 | break; | |
568 | } | |
569 | r = argv[optind]; | |
570 | if (r[0] != '-') { | |
571 | break; | |
572 | } | |
573 | optind++; | |
574 | r++; | |
575 | if (!strcmp(r, "-")) { | |
576 | break; | |
577 | } | |
578 | /* Treat --foo the same as -foo. */ | |
579 | if (r[0] == '-') { | |
580 | r++; | |
581 | } | |
582 | ||
583 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
584 | if (!strcmp(r, arginfo->argv)) { | |
585 | if (arginfo->has_arg) { | |
586 | if (optind >= argc) { | |
587 | (void) fprintf(stderr, | |
588 | "qemu: missing argument for option '%s'\n", r); | |
589 | exit(EXIT_FAILURE); | |
590 | } | |
591 | arginfo->handle_opt(argv[optind]); | |
592 | optind++; | |
593 | } else { | |
594 | arginfo->handle_opt(NULL); | |
595 | } | |
596 | break; | |
597 | } | |
598 | } | |
599 | ||
600 | /* no option matched the current argv */ | |
601 | if (arginfo->handle_opt == NULL) { | |
602 | (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); | |
603 | exit(EXIT_FAILURE); | |
604 | } | |
605 | } | |
606 | ||
607 | if (optind >= argc) { | |
608 | (void) fprintf(stderr, "qemu: no user program specified\n"); | |
609 | exit(EXIT_FAILURE); | |
610 | } | |
611 | ||
612 | exec_path = argv[optind]; | |
613 | ||
614 | return optind; | |
615 | } | |
616 | ||
617 | int main(int argc, char **argv, char **envp) | |
618 | { | |
619 | struct target_pt_regs regs1, *regs = ®s1; | |
620 | struct image_info info1, *info = &info1; | |
621 | struct linux_binprm bprm; | |
622 | TaskState *ts; | |
623 | CPUArchState *env; | |
624 | CPUState *cpu; | |
625 | int optind; | |
626 | char **target_environ, **wrk; | |
627 | char **target_argv; | |
628 | int target_argc; | |
629 | int i; | |
630 | int ret; | |
631 | int execfd; | |
632 | unsigned long max_reserved_va; | |
633 | ||
634 | error_init(argv[0]); | |
635 | module_call_init(MODULE_INIT_TRACE); | |
636 | qemu_init_cpu_list(); | |
637 | module_call_init(MODULE_INIT_QOM); | |
638 | ||
639 | envlist = envlist_create(); | |
640 | ||
641 | /* add current environment into the list */ | |
642 | for (wrk = environ; *wrk != NULL; wrk++) { | |
643 | (void) envlist_setenv(envlist, *wrk); | |
644 | } | |
645 | ||
646 | /* Read the stack limit from the kernel. If it's "unlimited", | |
647 | then we can do little else besides use the default. */ | |
648 | { | |
649 | struct rlimit lim; | |
650 | if (getrlimit(RLIMIT_STACK, &lim) == 0 | |
651 | && lim.rlim_cur != RLIM_INFINITY | |
652 | && lim.rlim_cur == (target_long)lim.rlim_cur) { | |
653 | guest_stack_size = lim.rlim_cur; | |
654 | } | |
655 | } | |
656 | ||
657 | cpu_model = NULL; | |
658 | ||
659 | qemu_add_opts(&qemu_trace_opts); | |
660 | qemu_plugin_add_opts(); | |
661 | ||
662 | optind = parse_args(argc, argv); | |
663 | ||
664 | if (!trace_init_backends()) { | |
665 | exit(1); | |
666 | } | |
667 | trace_init_file(trace_file); | |
668 | if (qemu_plugin_load_list(&plugins)) { | |
669 | exit(1); | |
670 | } | |
671 | ||
672 | /* Zero out regs */ | |
673 | memset(regs, 0, sizeof(struct target_pt_regs)); | |
674 | ||
675 | /* Zero out image_info */ | |
676 | memset(info, 0, sizeof(struct image_info)); | |
677 | ||
678 | memset(&bprm, 0, sizeof (bprm)); | |
679 | ||
680 | /* Scan interp_prefix dir for replacement files. */ | |
681 | init_paths(interp_prefix); | |
682 | ||
683 | init_qemu_uname_release(); | |
684 | ||
685 | execfd = qemu_getauxval(AT_EXECFD); | |
686 | if (execfd == 0) { | |
687 | execfd = open(exec_path, O_RDONLY); | |
688 | if (execfd < 0) { | |
689 | printf("Error while loading %s: %s\n", exec_path, strerror(errno)); | |
690 | _exit(EXIT_FAILURE); | |
691 | } | |
692 | } | |
693 | ||
694 | if (cpu_model == NULL) { | |
695 | cpu_model = cpu_get_model(get_elf_eflags(execfd)); | |
696 | } | |
697 | cpu_type = parse_cpu_option(cpu_model); | |
698 | ||
699 | /* init tcg before creating CPUs and to get qemu_host_page_size */ | |
700 | tcg_exec_init(0); | |
701 | ||
702 | cpu = cpu_create(cpu_type); | |
703 | env = cpu->env_ptr; | |
704 | cpu_reset(cpu); | |
705 | thread_cpu = cpu; | |
706 | ||
707 | /* | |
708 | * Reserving too much vm space via mmap can run into problems | |
709 | * with rlimits, oom due to page table creation, etc. We will | |
710 | * still try it, if directed by the command-line option, but | |
711 | * not by default. | |
712 | */ | |
713 | max_reserved_va = MAX_RESERVED_VA(cpu); | |
714 | if (reserved_va != 0) { | |
715 | if (max_reserved_va && reserved_va > max_reserved_va) { | |
716 | fprintf(stderr, "Reserved virtual address too big\n"); | |
717 | exit(EXIT_FAILURE); | |
718 | } | |
719 | } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { | |
720 | /* | |
721 | * reserved_va must be aligned with the host page size | |
722 | * as it is used with mmap() | |
723 | */ | |
724 | reserved_va = max_reserved_va & qemu_host_page_mask; | |
725 | } | |
726 | ||
727 | { | |
728 | Error *err = NULL; | |
729 | if (seed_optarg != NULL) { | |
730 | qemu_guest_random_seed_main(seed_optarg, &err); | |
731 | } else { | |
732 | qcrypto_init(&err); | |
733 | } | |
734 | if (err) { | |
735 | error_reportf_err(err, "cannot initialize crypto: "); | |
736 | exit(1); | |
737 | } | |
738 | } | |
739 | ||
740 | target_environ = envlist_to_environ(envlist, NULL); | |
741 | envlist_free(envlist); | |
742 | ||
743 | /* | |
744 | * Now that page sizes are configured in tcg_exec_init() we can do | |
745 | * proper page alignment for guest_base. | |
746 | */ | |
747 | guest_base = HOST_PAGE_ALIGN(guest_base); | |
748 | ||
749 | if (reserved_va || have_guest_base) { | |
750 | guest_base = init_guest_space(guest_base, reserved_va, 0, | |
751 | have_guest_base); | |
752 | if (guest_base == (unsigned long)-1) { | |
753 | fprintf(stderr, "Unable to reserve 0x%lx bytes of virtual address " | |
754 | "space for use as guest address space (check your virtual " | |
755 | "memory ulimit setting or reserve less using -R option)\n", | |
756 | reserved_va); | |
757 | exit(EXIT_FAILURE); | |
758 | } | |
759 | ||
760 | if (reserved_va) { | |
761 | mmap_next_start = reserved_va; | |
762 | } | |
763 | } | |
764 | ||
765 | /* | |
766 | * Read in mmap_min_addr kernel parameter. This value is used | |
767 | * When loading the ELF image to determine whether guest_base | |
768 | * is needed. It is also used in mmap_find_vma. | |
769 | */ | |
770 | { | |
771 | FILE *fp; | |
772 | ||
773 | if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { | |
774 | unsigned long tmp; | |
775 | if (fscanf(fp, "%lu", &tmp) == 1) { | |
776 | mmap_min_addr = tmp; | |
777 | qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); | |
778 | } | |
779 | fclose(fp); | |
780 | } | |
781 | } | |
782 | ||
783 | /* | |
784 | * Prepare copy of argv vector for target. | |
785 | */ | |
786 | target_argc = argc - optind; | |
787 | target_argv = calloc(target_argc + 1, sizeof (char *)); | |
788 | if (target_argv == NULL) { | |
789 | (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); | |
790 | exit(EXIT_FAILURE); | |
791 | } | |
792 | ||
793 | /* | |
794 | * If argv0 is specified (using '-0' switch) we replace | |
795 | * argv[0] pointer with the given one. | |
796 | */ | |
797 | i = 0; | |
798 | if (argv0 != NULL) { | |
799 | target_argv[i++] = strdup(argv0); | |
800 | } | |
801 | for (; i < target_argc; i++) { | |
802 | target_argv[i] = strdup(argv[optind + i]); | |
803 | } | |
804 | target_argv[target_argc] = NULL; | |
805 | ||
806 | ts = g_new0(TaskState, 1); | |
807 | init_task_state(ts); | |
808 | /* build Task State */ | |
809 | ts->info = info; | |
810 | ts->bprm = &bprm; | |
811 | cpu->opaque = ts; | |
812 | task_settid(ts); | |
813 | ||
814 | ret = loader_exec(execfd, exec_path, target_argv, target_environ, regs, | |
815 | info, &bprm); | |
816 | if (ret != 0) { | |
817 | printf("Error while loading %s: %s\n", exec_path, strerror(-ret)); | |
818 | _exit(EXIT_FAILURE); | |
819 | } | |
820 | ||
821 | for (wrk = target_environ; *wrk; wrk++) { | |
822 | g_free(*wrk); | |
823 | } | |
824 | ||
825 | g_free(target_environ); | |
826 | ||
827 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { | |
828 | qemu_log("guest_base 0x%lx\n", guest_base); | |
829 | log_page_dump("binary load"); | |
830 | ||
831 | qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); | |
832 | qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); | |
833 | qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code); | |
834 | qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data); | |
835 | qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); | |
836 | qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack); | |
837 | qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); | |
838 | qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
839 | qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start); | |
840 | qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n", | |
841 | info->arg_end + (abi_ulong)sizeof(abi_ulong)); | |
842 | qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv); | |
843 | } | |
844 | ||
845 | target_set_brk(info->brk); | |
846 | syscall_init(); | |
847 | signal_init(); | |
848 | ||
849 | /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay | |
850 | generating the prologue until now so that the prologue can take | |
851 | the real value of GUEST_BASE into account. */ | |
852 | tcg_prologue_init(tcg_ctx); | |
853 | tcg_region_init(); | |
854 | ||
855 | target_cpu_copy_regs(env, regs); | |
856 | ||
857 | if (gdbstub_port) { | |
858 | if (gdbserver_start(gdbstub_port) < 0) { | |
859 | fprintf(stderr, "qemu: could not open gdbserver on port %d\n", | |
860 | gdbstub_port); | |
861 | exit(EXIT_FAILURE); | |
862 | } | |
863 | gdb_handlesig(cpu, 0); | |
864 | } | |
865 | cpu_loop(env); | |
866 | /* never exits */ | |
867 | return 0; | |
868 | } |