Merge tag 'pull-la-20220814' of https://gitlab.com/rth7680/qemu into staging
[qemu.git] / linux-user / main.c
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/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 = &regs1;
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 }