aspeed: Introduce a boot_rom region at the machine level
[qemu/kevin.git] / bsd-user / main.c
blobb597328118ec1a407309b92b858b1ee31c47cae8
1 /*
2 * qemu bsd user main
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 * Copyright (c) 2013-14 Stacey Son
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.
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.
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/>.
21 #include "qemu/osdep.h"
22 #include <sys/resource.h>
23 #include <sys/sysctl.h>
25 #include "qemu/help-texts.h"
26 #include "qemu/units.h"
27 #include "qemu/accel.h"
28 #include "qemu-version.h"
29 #include <machine/trap.h>
31 #include "qapi/error.h"
32 #include "qemu.h"
33 #include "qemu/config-file.h"
34 #include "qemu/error-report.h"
35 #include "qemu/path.h"
36 #include "qemu/help_option.h"
37 #include "qemu/module.h"
38 #include "exec/exec-all.h"
39 #include "tcg/tcg.h"
40 #include "qemu/timer.h"
41 #include "qemu/envlist.h"
42 #include "qemu/cutils.h"
43 #include "exec/log.h"
44 #include "trace/control.h"
45 #include "crypto/init.h"
46 #include "qemu/guest-random.h"
47 #include "gdbstub/user.h"
49 #include "host-os.h"
50 #include "target_arch_cpu.h"
52 static bool opt_one_insn_per_tb;
53 uintptr_t guest_base;
54 bool have_guest_base;
56 * When running 32-on-64 we should make sure we can fit all of the possible
57 * guest address space into a contiguous chunk of virtual host memory.
59 * This way we will never overlap with our own libraries or binaries or stack
60 * or anything else that QEMU maps.
62 * Many cpus reserve the high bit (or more than one for some 64-bit cpus)
63 * of the address for the kernel. Some cpus rely on this and user space
64 * uses the high bit(s) for pointer tagging and the like. For them, we
65 * must preserve the expected address space.
67 #ifndef MAX_RESERVED_VA
68 # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS
69 # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \
70 (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32))
71 # define MAX_RESERVED_VA 0xfffffffful
72 # else
73 # define MAX_RESERVED_VA ((1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1)
74 # endif
75 # else
76 # define MAX_RESERVED_VA 0
77 # endif
78 #endif
81 * That said, reserving *too* much vm space via mmap can run into problems
82 * with rlimits, oom due to page table creation, etc. We will still try it,
83 * if directed by the command-line option, but not by default.
85 #if HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32
86 unsigned long reserved_va = MAX_RESERVED_VA;
87 #else
88 unsigned long reserved_va;
89 #endif
91 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
92 const char *qemu_uname_release;
93 char qemu_proc_pathname[PATH_MAX]; /* full path to exeutable */
95 unsigned long target_maxtsiz = TARGET_MAXTSIZ; /* max text size */
96 unsigned long target_dfldsiz = TARGET_DFLDSIZ; /* initial data size limit */
97 unsigned long target_maxdsiz = TARGET_MAXDSIZ; /* max data size */
98 unsigned long target_dflssiz = TARGET_DFLSSIZ; /* initial data size limit */
99 unsigned long target_maxssiz = TARGET_MAXSSIZ; /* max stack size */
100 unsigned long target_sgrowsiz = TARGET_SGROWSIZ; /* amount to grow stack */
102 /* Helper routines for implementing atomic operations. */
104 void fork_start(void)
106 start_exclusive();
107 cpu_list_lock();
108 mmap_fork_start();
111 void fork_end(int child)
113 if (child) {
114 CPUState *cpu, *next_cpu;
116 * Child processes created by fork() only have a single thread. Discard
117 * information about the parent threads.
119 CPU_FOREACH_SAFE(cpu, next_cpu) {
120 if (cpu != thread_cpu) {
121 QTAILQ_REMOVE_RCU(&cpus, cpu, node);
124 mmap_fork_end(child);
126 * qemu_init_cpu_list() takes care of reinitializing the exclusive
127 * state, so we don't need to end_exclusive() here.
129 qemu_init_cpu_list();
130 gdbserver_fork(thread_cpu);
131 } else {
132 mmap_fork_end(child);
133 cpu_list_unlock();
134 end_exclusive();
138 void cpu_loop(CPUArchState *env)
140 target_cpu_loop(env);
143 static void usage(void)
145 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
146 "\n" QEMU_COPYRIGHT "\n"
147 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
148 "BSD CPU emulator (compiled for %s emulation)\n"
149 "\n"
150 "Standard options:\n"
151 "-h print this help\n"
152 "-g port wait gdb connection to port\n"
153 "-L path set the elf interpreter prefix (default=%s)\n"
154 "-s size set the stack size in bytes (default=%ld)\n"
155 "-cpu model select CPU (-cpu help for list)\n"
156 "-drop-ld-preload drop LD_PRELOAD for target process\n"
157 "-E var=value sets/modifies targets environment variable(s)\n"
158 "-U var unsets targets environment variable(s)\n"
159 "-B address set guest_base address to address\n"
160 "\n"
161 "Debug options:\n"
162 "-d item1[,...] enable logging of specified items\n"
163 " (use '-d help' for a list of log items)\n"
164 "-D logfile write logs to 'logfile' (default stderr)\n"
165 "-one-insn-per-tb run with one guest instruction per emulated TB\n"
166 "-singlestep deprecated synonym for -one-insn-per-tb\n"
167 "-strace log system calls\n"
168 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
169 " specify tracing options\n"
170 "\n"
171 "Environment variables:\n"
172 "QEMU_STRACE Print system calls and arguments similar to the\n"
173 " 'strace' program. Enable by setting to any value.\n"
174 "You can use -E and -U options to set/unset environment variables\n"
175 "for target process. It is possible to provide several variables\n"
176 "by repeating the option. For example:\n"
177 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
178 "Note that if you provide several changes to single variable\n"
179 "last change will stay in effect.\n"
180 "\n"
181 QEMU_HELP_BOTTOM "\n"
183 TARGET_NAME,
184 interp_prefix,
185 target_dflssiz);
186 exit(1);
189 __thread CPUState *thread_cpu;
191 void stop_all_tasks(void)
194 * We trust when using NPTL (pthreads) start_exclusive() handles thread
195 * stopping correctly.
197 start_exclusive();
200 bool qemu_cpu_is_self(CPUState *cpu)
202 return thread_cpu == cpu;
205 void qemu_cpu_kick(CPUState *cpu)
207 cpu_exit(cpu);
210 /* Assumes contents are already zeroed. */
211 static void init_task_state(TaskState *ts)
213 ts->sigaltstack_used = (struct target_sigaltstack) {
214 .ss_sp = 0,
215 .ss_size = 0,
216 .ss_flags = TARGET_SS_DISABLE,
220 void gemu_log(const char *fmt, ...)
222 va_list ap;
224 va_start(ap, fmt);
225 vfprintf(stderr, fmt, ap);
226 va_end(ap);
229 static void
230 adjust_ssize(void)
232 struct rlimit rl;
234 if (getrlimit(RLIMIT_STACK, &rl) != 0) {
235 return;
238 target_maxssiz = MIN(target_maxssiz, rl.rlim_max);
239 target_dflssiz = MIN(MAX(target_dflssiz, rl.rlim_cur), target_maxssiz);
241 rl.rlim_max = target_maxssiz;
242 rl.rlim_cur = target_dflssiz;
243 setrlimit(RLIMIT_STACK, &rl);
246 static void save_proc_pathname(char *argv0)
248 int mib[4];
249 size_t len;
251 mib[0] = CTL_KERN;
252 mib[1] = KERN_PROC;
253 mib[2] = KERN_PROC_PATHNAME;
254 mib[3] = -1;
256 len = sizeof(qemu_proc_pathname);
257 if (sysctl(mib, 4, qemu_proc_pathname, &len, NULL, 0)) {
258 perror("sysctl");
262 int main(int argc, char **argv)
264 const char *filename;
265 const char *cpu_model;
266 const char *cpu_type;
267 const char *log_file = NULL;
268 const char *log_mask = NULL;
269 const char *seed_optarg = NULL;
270 struct target_pt_regs regs1, *regs = &regs1;
271 struct image_info info1, *info = &info1;
272 struct bsd_binprm bprm;
273 TaskState *ts;
274 CPUArchState *env;
275 CPUState *cpu;
276 int optind, rv;
277 const char *r;
278 const char *gdbstub = NULL;
279 char **target_environ, **wrk;
280 envlist_t *envlist = NULL;
281 char *argv0 = NULL;
283 adjust_ssize();
285 if (argc <= 1) {
286 usage();
289 save_proc_pathname(argv[0]);
291 error_init(argv[0]);
292 module_call_init(MODULE_INIT_TRACE);
293 qemu_init_cpu_list();
294 module_call_init(MODULE_INIT_QOM);
296 envlist = envlist_create();
299 * add current environment into the list
300 * envlist_setenv adds to the front of the list; to preserve environ
301 * order add from back to front
303 for (wrk = environ; *wrk != NULL; wrk++) {
304 continue;
306 while (wrk != environ) {
307 wrk--;
308 (void) envlist_setenv(envlist, *wrk);
311 cpu_model = NULL;
313 qemu_add_opts(&qemu_trace_opts);
315 optind = 1;
316 for (;;) {
317 if (optind >= argc) {
318 break;
320 r = argv[optind];
321 if (r[0] != '-') {
322 break;
324 optind++;
325 r++;
326 if (!strcmp(r, "-")) {
327 break;
328 } else if (!strcmp(r, "d")) {
329 if (optind >= argc) {
330 break;
332 log_mask = argv[optind++];
333 } else if (!strcmp(r, "D")) {
334 if (optind >= argc) {
335 break;
337 log_file = argv[optind++];
338 } else if (!strcmp(r, "E")) {
339 r = argv[optind++];
340 if (envlist_setenv(envlist, r) != 0) {
341 usage();
343 } else if (!strcmp(r, "ignore-environment")) {
344 envlist_free(envlist);
345 envlist = envlist_create();
346 } else if (!strcmp(r, "U")) {
347 r = argv[optind++];
348 if (envlist_unsetenv(envlist, r) != 0) {
349 usage();
351 } else if (!strcmp(r, "s")) {
352 r = argv[optind++];
353 rv = qemu_strtoul(r, &r, 0, &target_dflssiz);
354 if (rv < 0 || target_dflssiz <= 0) {
355 usage();
357 if (*r == 'M') {
358 target_dflssiz *= 1024 * 1024;
359 } else if (*r == 'k' || *r == 'K') {
360 target_dflssiz *= 1024;
362 if (target_dflssiz > target_maxssiz) {
363 usage();
365 } else if (!strcmp(r, "L")) {
366 interp_prefix = argv[optind++];
367 } else if (!strcmp(r, "p")) {
368 qemu_host_page_size = atoi(argv[optind++]);
369 if (qemu_host_page_size == 0 ||
370 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
371 fprintf(stderr, "page size must be a power of two\n");
372 exit(1);
374 } else if (!strcmp(r, "g")) {
375 gdbstub = g_strdup(argv[optind++]);
376 } else if (!strcmp(r, "r")) {
377 qemu_uname_release = argv[optind++];
378 } else if (!strcmp(r, "cpu")) {
379 cpu_model = argv[optind++];
380 if (is_help_option(cpu_model)) {
381 /* XXX: implement xxx_cpu_list for targets that still miss it */
382 #if defined(cpu_list)
383 cpu_list();
384 #endif
385 exit(1);
387 } else if (!strcmp(r, "B")) {
388 rv = qemu_strtoul(argv[optind++], NULL, 0, &guest_base);
389 if (rv < 0) {
390 usage();
392 have_guest_base = true;
393 } else if (!strcmp(r, "drop-ld-preload")) {
394 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
395 } else if (!strcmp(r, "seed")) {
396 seed_optarg = optarg;
397 } else if (!strcmp(r, "singlestep") || !strcmp(r, "one-insn-per-tb")) {
398 opt_one_insn_per_tb = true;
399 } else if (!strcmp(r, "strace")) {
400 do_strace = 1;
401 } else if (!strcmp(r, "trace")) {
402 trace_opt_parse(optarg);
403 } else if (!strcmp(r, "0")) {
404 argv0 = argv[optind++];
405 } else {
406 usage();
410 /* init debug */
412 int mask = 0;
413 if (log_mask) {
414 mask = qemu_str_to_log_mask(log_mask);
415 if (!mask) {
416 qemu_print_log_usage(stdout);
417 exit(1);
420 qemu_set_log_filename_flags(log_file, mask, &error_fatal);
423 if (optind >= argc) {
424 usage();
426 filename = argv[optind];
427 if (argv0) {
428 argv[optind] = argv0;
431 if (!trace_init_backends()) {
432 exit(1);
434 trace_init_file();
436 /* Zero out regs */
437 memset(regs, 0, sizeof(struct target_pt_regs));
439 /* Zero bsd params */
440 memset(&bprm, 0, sizeof(bprm));
442 /* Zero out image_info */
443 memset(info, 0, sizeof(struct image_info));
445 /* Scan interp_prefix dir for replacement files. */
446 init_paths(interp_prefix);
448 if (cpu_model == NULL) {
449 cpu_model = TARGET_DEFAULT_CPU_MODEL;
452 cpu_type = parse_cpu_option(cpu_model);
454 /* init tcg before creating CPUs and to get qemu_host_page_size */
456 AccelState *accel = current_accel();
457 AccelClass *ac = ACCEL_GET_CLASS(accel);
459 accel_init_interfaces(ac);
460 object_property_set_bool(OBJECT(accel), "one-insn-per-tb",
461 opt_one_insn_per_tb, &error_abort);
462 ac->init_machine(NULL);
464 cpu = cpu_create(cpu_type);
465 env = cpu->env_ptr;
466 cpu_reset(cpu);
467 thread_cpu = cpu;
469 if (getenv("QEMU_STRACE")) {
470 do_strace = 1;
473 target_environ = envlist_to_environ(envlist, NULL);
474 envlist_free(envlist);
476 if (reserved_va) {
477 mmap_next_start = reserved_va + 1;
481 Error *err = NULL;
482 if (seed_optarg != NULL) {
483 qemu_guest_random_seed_main(seed_optarg, &err);
484 } else {
485 qcrypto_init(&err);
487 if (err) {
488 error_reportf_err(err, "cannot initialize crypto: ");
489 exit(1);
494 * Now that page sizes are configured we can do
495 * proper page alignment for guest_base.
497 guest_base = HOST_PAGE_ALIGN(guest_base);
499 if (loader_exec(filename, argv + optind, target_environ, regs, info,
500 &bprm) != 0) {
501 printf("Error loading %s\n", filename);
502 _exit(1);
505 for (wrk = target_environ; *wrk; wrk++) {
506 g_free(*wrk);
509 g_free(target_environ);
511 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
512 FILE *f = qemu_log_trylock();
513 if (f) {
514 fprintf(f, "guest_base %p\n", (void *)guest_base);
515 fprintf(f, "page layout changed following binary load\n");
516 page_dump(f);
518 fprintf(f, "start_brk 0x" TARGET_ABI_FMT_lx "\n",
519 info->start_brk);
520 fprintf(f, "end_code 0x" TARGET_ABI_FMT_lx "\n",
521 info->end_code);
522 fprintf(f, "start_code 0x" TARGET_ABI_FMT_lx "\n",
523 info->start_code);
524 fprintf(f, "start_data 0x" TARGET_ABI_FMT_lx "\n",
525 info->start_data);
526 fprintf(f, "end_data 0x" TARGET_ABI_FMT_lx "\n",
527 info->end_data);
528 fprintf(f, "start_stack 0x" TARGET_ABI_FMT_lx "\n",
529 info->start_stack);
530 fprintf(f, "brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
531 fprintf(f, "entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
533 qemu_log_unlock(f);
537 /* build Task State */
538 ts = g_new0(TaskState, 1);
539 init_task_state(ts);
540 ts->info = info;
541 ts->bprm = &bprm;
542 cpu->opaque = ts;
544 target_set_brk(info->brk);
545 syscall_init();
546 signal_init();
549 * Now that we've loaded the binary, GUEST_BASE is fixed. Delay
550 * generating the prologue until now so that the prologue can take
551 * the real value of GUEST_BASE into account.
553 tcg_prologue_init(tcg_ctx);
555 target_cpu_init(env, regs);
557 if (gdbstub) {
558 gdbserver_start(gdbstub);
559 gdb_handlesig(cpu, 0);
561 cpu_loop(env);
562 /* never exits */
563 return 0;