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Commit | Line | Data |
---|---|---|
84778508 | 1 | /* |
4c0a4fe6 | 2 | * qemu bsd user main |
84778508 BS |
3 | * |
4 | * Copyright (c) 2003-2008 Fabrice Bellard | |
4c0a4fe6 | 5 | * Copyright (c) 2013-14 Stacey Son |
84778508 BS |
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 | |
8167ee88 | 18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
84778508 | 19 | */ |
14a48c1d | 20 | |
48e438a3 | 21 | #include "qemu/osdep.h" |
312a0b1c WL |
22 | #include <sys/resource.h> |
23 | #include <sys/sysctl.h> | |
24 | ||
49f95221 | 25 | #include "qemu/help-texts.h" |
66d26ddb | 26 | #include "qemu/units.h" |
940e43aa | 27 | #include "qemu/accel.h" |
8c1c230a | 28 | #include "qemu-version.h" |
84778508 BS |
29 | #include <machine/trap.h> |
30 | ||
daa76aa4 | 31 | #include "qapi/error.h" |
84778508 | 32 | #include "qemu.h" |
6913e79c | 33 | #include "qemu/config-file.h" |
f5852efa | 34 | #include "qemu/error-report.h" |
f348b6d1 VB |
35 | #include "qemu/path.h" |
36 | #include "qemu/help_option.h" | |
0b8fa32f | 37 | #include "qemu/module.h" |
5b6828d1 | 38 | #include "qemu/plugin.h" |
63c91552 | 39 | #include "exec/exec-all.h" |
16aa8eaa | 40 | #include "user/guest-base.h" |
d7ec12f8 | 41 | #include "tcg/startup.h" |
1de7afc9 PB |
42 | #include "qemu/timer.h" |
43 | #include "qemu/envlist.h" | |
29aabb4f | 44 | #include "qemu/cutils.h" |
508127e2 | 45 | #include "exec/log.h" |
6913e79c | 46 | #include "trace/control.h" |
03ecf078 WL |
47 | #include "crypto/init.h" |
48 | #include "qemu/guest-random.h" | |
d96bf49b | 49 | #include "gdbstub/user.h" |
ba379542 | 50 | #include "exec/page-vary.h" |
fc0d96b4 | 51 | |
d1dc9ab3 | 52 | #include "host-os.h" |
031fe7af | 53 | #include "target_arch_cpu.h" |
d1dc9ab3 | 54 | |
8c45039f RH |
55 | |
56 | /* | |
57 | * TODO: Remove these and rely only on qemu_real_host_page_size(). | |
58 | */ | |
59 | uintptr_t qemu_host_page_size; | |
60 | intptr_t qemu_host_page_mask; | |
61 | ||
3cfb0456 | 62 | static bool opt_one_insn_per_tb; |
5ca870b9 | 63 | uintptr_t guest_base; |
e307c192 | 64 | bool have_guest_base; |
be04f210 WL |
65 | /* |
66 | * When running 32-on-64 we should make sure we can fit all of the possible | |
67 | * guest address space into a contiguous chunk of virtual host memory. | |
68 | * | |
69 | * This way we will never overlap with our own libraries or binaries or stack | |
70 | * or anything else that QEMU maps. | |
71 | * | |
72 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
73 | * of the address for the kernel. Some cpus rely on this and user space | |
74 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
75 | * must preserve the expected address space. | |
76 | */ | |
77 | #ifndef MAX_RESERVED_VA | |
78 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
79 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
80 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
cb4c2590 | 81 | # define MAX_RESERVED_VA(CPU) 0xfffffffful |
be04f210 | 82 | # else |
cb4c2590 | 83 | # define MAX_RESERVED_VA(CPU) ((1ul << TARGET_VIRT_ADDR_SPACE_BITS) - 1) |
be04f210 WL |
84 | # endif |
85 | # else | |
cb4c2590 | 86 | # define MAX_RESERVED_VA(CPU) 0 |
be04f210 WL |
87 | # endif |
88 | #endif | |
89 | ||
d6ef40bf | 90 | unsigned long reserved_va; |
1b530a6d | 91 | |
86327290 | 92 | const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; |
fccae322 | 93 | const char *qemu_uname_release; |
84778508 | 94 | |
312a0b1c WL |
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 */ | |
84778508 | 101 | |
63cca106 | 102 | /* Helper routines for implementing atomic operations. */ |
9399f095 | 103 | |
9399f095 BS |
104 | void fork_start(void) |
105 | { | |
63cca106 | 106 | start_exclusive(); |
63cca106 | 107 | mmap_fork_start(); |
5b6828d1 JC |
108 | cpu_list_lock(); |
109 | qemu_plugin_user_prefork_lock(); | |
3d6ed98d | 110 | gdbserver_fork_start(); |
9399f095 BS |
111 | } |
112 | ||
4edc98fc | 113 | void fork_end(pid_t pid) |
9399f095 | 114 | { |
4edc98fc IL |
115 | bool child = pid == 0; |
116 | ||
5b6828d1 JC |
117 | qemu_plugin_user_postfork(child); |
118 | mmap_fork_end(child); | |
9399f095 | 119 | if (child) { |
63cca106 WL |
120 | CPUState *cpu, *next_cpu; |
121 | /* | |
5b6828d1 JC |
122 | * Child processes created by fork() only have a single thread. |
123 | * Discard information about the parent threads. | |
63cca106 WL |
124 | */ |
125 | CPU_FOREACH_SAFE(cpu, next_cpu) { | |
126 | if (cpu != thread_cpu) { | |
3c55dd58 | 127 | QTAILQ_REMOVE_RCU(&cpus_queue, cpu, node); |
63cca106 WL |
128 | } |
129 | } | |
63cca106 | 130 | qemu_init_cpu_list(); |
d4e1369a | 131 | get_task_state(thread_cpu)->ts_tid = qemu_get_thread_id(); |
63cca106 | 132 | } else { |
63cca106 | 133 | cpu_list_unlock(); |
9399f095 | 134 | } |
5b6828d1 JC |
135 | gdbserver_fork_end(thread_cpu, pid); |
136 | /* | |
137 | * qemu_init_cpu_list() reinitialized the child exclusive state, but we | |
138 | * also need to keep current_cpu consistent, so call end_exclusive() for | |
139 | * both child and parent. | |
140 | */ | |
141 | end_exclusive(); | |
9399f095 BS |
142 | } |
143 | ||
031fe7af | 144 | void cpu_loop(CPUArchState *env) |
31fc12df | 145 | { |
031fe7af | 146 | target_cpu_loop(env); |
31fc12df BS |
147 | } |
148 | ||
84778508 BS |
149 | static void usage(void) |
150 | { | |
7e563bfb | 151 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION |
0781dd6e | 152 | "\n" QEMU_COPYRIGHT "\n" |
2e59915d | 153 | "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" |
84778508 BS |
154 | "BSD CPU emulator (compiled for %s emulation)\n" |
155 | "\n" | |
156 | "Standard options:\n" | |
157 | "-h print this help\n" | |
158 | "-g port wait gdb connection to port\n" | |
159 | "-L path set the elf interpreter prefix (default=%s)\n" | |
160 | "-s size set the stack size in bytes (default=%ld)\n" | |
c8057f95 | 161 | "-cpu model select CPU (-cpu help for list)\n" |
84778508 | 162 | "-drop-ld-preload drop LD_PRELOAD for target process\n" |
fc0d96b4 BS |
163 | "-E var=value sets/modifies targets environment variable(s)\n" |
164 | "-U var unsets targets environment variable(s)\n" | |
2fa5d9ba | 165 | "-B address set guest_base address to address\n" |
84778508 BS |
166 | "\n" |
167 | "Debug options:\n" | |
989b697d PM |
168 | "-d item1[,...] enable logging of specified items\n" |
169 | " (use '-d help' for a list of log items)\n" | |
170 | "-D logfile write logs to 'logfile' (default stderr)\n" | |
060e0cd7 | 171 | "-one-insn-per-tb run with one guest instruction per emulated TB\n" |
989b697d | 172 | "-strace log system calls\n" |
6913e79c LV |
173 | "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n" |
174 | " specify tracing options\n" | |
84778508 BS |
175 | "\n" |
176 | "Environment variables:\n" | |
177 | "QEMU_STRACE Print system calls and arguments similar to the\n" | |
178 | " 'strace' program. Enable by setting to any value.\n" | |
fc0d96b4 BS |
179 | "You can use -E and -U options to set/unset environment variables\n" |
180 | "for target process. It is possible to provide several variables\n" | |
181 | "by repeating the option. For example:\n" | |
182 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
183 | "Note that if you provide several changes to single variable\n" | |
184 | "last change will stay in effect.\n" | |
f5048cb7 EB |
185 | "\n" |
186 | QEMU_HELP_BOTTOM "\n" | |
84778508 | 187 | , |
2e59915d | 188 | TARGET_NAME, |
84778508 | 189 | interp_prefix, |
312a0b1c | 190 | target_dflssiz); |
2d18e637 | 191 | exit(1); |
84778508 BS |
192 | } |
193 | ||
d42df502 | 194 | __thread CPUState *thread_cpu; |
84778508 | 195 | |
653ccec2 WL |
196 | void stop_all_tasks(void) |
197 | { | |
198 | /* | |
199 | * We trust when using NPTL (pthreads) start_exclusive() handles thread | |
200 | * stopping correctly. | |
201 | */ | |
202 | start_exclusive(); | |
203 | } | |
204 | ||
48f59211 EM |
205 | bool qemu_cpu_is_self(CPUState *cpu) |
206 | { | |
207 | return thread_cpu == cpu; | |
208 | } | |
209 | ||
210 | void qemu_cpu_kick(CPUState *cpu) | |
211 | { | |
212 | cpu_exit(cpu); | |
213 | } | |
214 | ||
84778508 | 215 | /* Assumes contents are already zeroed. */ |
b46d4ad7 | 216 | static void init_task_state(TaskState *ts) |
84778508 | 217 | { |
46f4f76d WL |
218 | ts->sigaltstack_used = (struct target_sigaltstack) { |
219 | .ss_sp = 0, | |
220 | .ss_size = 0, | |
221 | .ss_flags = TARGET_SS_DISABLE, | |
222 | }; | |
84778508 BS |
223 | } |
224 | ||
f0f7f9dc WL |
225 | void gemu_log(const char *fmt, ...) |
226 | { | |
227 | va_list ap; | |
228 | ||
229 | va_start(ap, fmt); | |
230 | vfprintf(stderr, fmt, ap); | |
231 | va_end(ap); | |
232 | } | |
233 | ||
312a0b1c WL |
234 | static void |
235 | adjust_ssize(void) | |
236 | { | |
237 | struct rlimit rl; | |
238 | ||
239 | if (getrlimit(RLIMIT_STACK, &rl) != 0) { | |
240 | return; | |
241 | } | |
242 | ||
243 | target_maxssiz = MIN(target_maxssiz, rl.rlim_max); | |
244 | target_dflssiz = MIN(MAX(target_dflssiz, rl.rlim_cur), target_maxssiz); | |
245 | ||
246 | rl.rlim_max = target_maxssiz; | |
247 | rl.rlim_cur = target_dflssiz; | |
248 | setrlimit(RLIMIT_STACK, &rl); | |
249 | } | |
250 | ||
84778508 BS |
251 | int main(int argc, char **argv) |
252 | { | |
253 | const char *filename; | |
254 | const char *cpu_model; | |
2278b939 | 255 | const char *cpu_type; |
989b697d | 256 | const char *log_file = NULL; |
c235d738 | 257 | const char *log_mask = NULL; |
03ecf078 | 258 | const char *seed_optarg = NULL; |
84778508 BS |
259 | struct target_pt_regs regs1, *regs = ®s1; |
260 | struct image_info info1, *info = &info1; | |
d37853f9 | 261 | struct bsd_binprm bprm; |
031fe7af | 262 | TaskState *ts; |
9349b4f9 | 263 | CPUArchState *env; |
db6b81d4 | 264 | CPUState *cpu; |
29aabb4f | 265 | int optind, rv; |
84778508 | 266 | const char *r; |
fcedd920 | 267 | const char *gdbstub = NULL; |
fc0d96b4 BS |
268 | char **target_environ, **wrk; |
269 | envlist_t *envlist = NULL; | |
b8012648 | 270 | char *argv0 = NULL; |
ba379542 | 271 | int host_page_size; |
cb4c2590 | 272 | unsigned long max_reserved_va; |
84778508 | 273 | |
312a0b1c WL |
274 | adjust_ssize(); |
275 | ||
b23a51dc | 276 | if (argc <= 1) { |
84778508 | 277 | usage(); |
b23a51dc | 278 | } |
84778508 | 279 | |
01a298a5 | 280 | |
f5852efa | 281 | error_init(argv[0]); |
fe4db84d | 282 | module_call_init(MODULE_INIT_TRACE); |
267f685b | 283 | qemu_init_cpu_list(); |
ce008c1f AF |
284 | module_call_init(MODULE_INIT_QOM); |
285 | ||
ec45bbe5 | 286 | envlist = envlist_create(); |
fc0d96b4 | 287 | |
7f750efc AS |
288 | /* |
289 | * add current environment into the list | |
290 | * envlist_setenv adds to the front of the list; to preserve environ | |
291 | * order add from back to front | |
292 | */ | |
fc0d96b4 | 293 | for (wrk = environ; *wrk != NULL; wrk++) { |
7f750efc AS |
294 | continue; |
295 | } | |
296 | while (wrk != environ) { | |
297 | wrk--; | |
fc0d96b4 BS |
298 | (void) envlist_setenv(envlist, *wrk); |
299 | } | |
300 | ||
8c45039f RH |
301 | qemu_host_page_size = getpagesize(); |
302 | qemu_host_page_size = MAX(qemu_host_page_size, TARGET_PAGE_SIZE); | |
303 | ||
84778508 | 304 | cpu_model = NULL; |
0c62de2f | 305 | |
6913e79c LV |
306 | qemu_add_opts(&qemu_trace_opts); |
307 | ||
84778508 | 308 | optind = 1; |
6913e79c | 309 | for (;;) { |
b23a51dc | 310 | if (optind >= argc) { |
84778508 | 311 | break; |
b23a51dc | 312 | } |
84778508 | 313 | r = argv[optind]; |
b23a51dc | 314 | if (r[0] != '-') { |
84778508 | 315 | break; |
b23a51dc | 316 | } |
84778508 BS |
317 | optind++; |
318 | r++; | |
319 | if (!strcmp(r, "-")) { | |
320 | break; | |
321 | } else if (!strcmp(r, "d")) { | |
c235d738 | 322 | if (optind >= argc) { |
84778508 | 323 | break; |
84778508 | 324 | } |
c235d738 MF |
325 | log_mask = argv[optind++]; |
326 | } else if (!strcmp(r, "D")) { | |
327 | if (optind >= argc) { | |
328 | break; | |
329 | } | |
330 | log_file = argv[optind++]; | |
fc0d96b4 BS |
331 | } else if (!strcmp(r, "E")) { |
332 | r = argv[optind++]; | |
b23a51dc | 333 | if (envlist_setenv(envlist, r) != 0) { |
fc0d96b4 | 334 | usage(); |
b23a51dc | 335 | } |
f66724c9 SW |
336 | } else if (!strcmp(r, "ignore-environment")) { |
337 | envlist_free(envlist); | |
ec45bbe5 | 338 | envlist = envlist_create(); |
fc0d96b4 BS |
339 | } else if (!strcmp(r, "U")) { |
340 | r = argv[optind++]; | |
b23a51dc | 341 | if (envlist_unsetenv(envlist, r) != 0) { |
fc0d96b4 | 342 | usage(); |
b23a51dc | 343 | } |
84778508 BS |
344 | } else if (!strcmp(r, "s")) { |
345 | r = argv[optind++]; | |
312a0b1c WL |
346 | rv = qemu_strtoul(r, &r, 0, &target_dflssiz); |
347 | if (rv < 0 || target_dflssiz <= 0) { | |
84778508 | 348 | usage(); |
b23a51dc WL |
349 | } |
350 | if (*r == 'M') { | |
312a0b1c | 351 | target_dflssiz *= 1024 * 1024; |
b23a51dc | 352 | } else if (*r == 'k' || *r == 'K') { |
312a0b1c WL |
353 | target_dflssiz *= 1024; |
354 | } | |
355 | if (target_dflssiz > target_maxssiz) { | |
356 | usage(); | |
b23a51dc | 357 | } |
84778508 BS |
358 | } else if (!strcmp(r, "L")) { |
359 | interp_prefix = argv[optind++]; | |
360 | } else if (!strcmp(r, "p")) { | |
01e44980 RH |
361 | unsigned size, want = qemu_real_host_page_size(); |
362 | ||
363 | r = argv[optind++]; | |
364 | if (qemu_strtoui(r, NULL, 10, &size) || size != want) { | |
365 | warn_report("Deprecated page size option cannot " | |
366 | "change host page size (%u)", want); | |
84778508 BS |
367 | } |
368 | } else if (!strcmp(r, "g")) { | |
fcedd920 | 369 | gdbstub = g_strdup(argv[optind++]); |
84778508 BS |
370 | } else if (!strcmp(r, "r")) { |
371 | qemu_uname_release = argv[optind++]; | |
372 | } else if (!strcmp(r, "cpu")) { | |
373 | cpu_model = argv[optind++]; | |
c8057f95 | 374 | if (is_help_option(cpu_model)) { |
dfa47531 | 375 | list_cpus(); |
2d18e637 | 376 | exit(1); |
84778508 | 377 | } |
2fa5d9ba | 378 | } else if (!strcmp(r, "B")) { |
29aabb4f WL |
379 | rv = qemu_strtoul(argv[optind++], NULL, 0, &guest_base); |
380 | if (rv < 0) { | |
381 | usage(); | |
382 | } | |
d60c3b93 | 383 | have_guest_base = true; |
84778508 | 384 | } else if (!strcmp(r, "drop-ld-preload")) { |
fc0d96b4 | 385 | (void) envlist_unsetenv(envlist, "LD_PRELOAD"); |
03ecf078 WL |
386 | } else if (!strcmp(r, "seed")) { |
387 | seed_optarg = optarg; | |
c61a0d31 | 388 | } else if (!strcmp(r, "one-insn-per-tb")) { |
3cfb0456 | 389 | opt_one_insn_per_tb = true; |
84778508 BS |
390 | } else if (!strcmp(r, "strace")) { |
391 | do_strace = 1; | |
6913e79c | 392 | } else if (!strcmp(r, "trace")) { |
92eecfff | 393 | trace_opt_parse(optarg); |
b8012648 CP |
394 | } else if (!strcmp(r, "0")) { |
395 | argv0 = argv[optind++]; | |
6913e79c | 396 | } else { |
84778508 BS |
397 | usage(); |
398 | } | |
399 | } | |
84778508 | 400 | |
8c45039f RH |
401 | qemu_host_page_mask = -qemu_host_page_size; |
402 | ||
c235d738 | 403 | /* init debug */ |
905c78fe RH |
404 | { |
405 | int mask = 0; | |
406 | if (log_mask) { | |
407 | mask = qemu_str_to_log_mask(log_mask); | |
408 | if (!mask) { | |
409 | qemu_print_log_usage(stdout); | |
410 | exit(1); | |
411 | } | |
c235d738 | 412 | } |
905c78fe | 413 | qemu_set_log_filename_flags(log_file, mask, &error_fatal); |
c235d738 MF |
414 | } |
415 | ||
4b5dfd82 PM |
416 | if (optind >= argc) { |
417 | usage(); | |
418 | } | |
419 | filename = argv[optind]; | |
b8012648 CP |
420 | if (argv0) { |
421 | argv[optind] = argv0; | |
422 | } | |
4b5dfd82 | 423 | |
6913e79c LV |
424 | if (!trace_init_backends()) { |
425 | exit(1); | |
426 | } | |
92eecfff | 427 | trace_init_file(); |
6913e79c | 428 | |
84778508 BS |
429 | /* Zero out regs */ |
430 | memset(regs, 0, sizeof(struct target_pt_regs)); | |
431 | ||
d37853f9 WL |
432 | /* Zero bsd params */ |
433 | memset(&bprm, 0, sizeof(bprm)); | |
434 | ||
84778508 BS |
435 | /* Zero out image_info */ |
436 | memset(info, 0, sizeof(struct image_info)); | |
437 | ||
438 | /* Scan interp_prefix dir for replacement files. */ | |
439 | init_paths(interp_prefix); | |
440 | ||
441 | if (cpu_model == NULL) { | |
031fe7af | 442 | cpu_model = TARGET_DEFAULT_CPU_MODEL; |
84778508 | 443 | } |
2b5249b8 | 444 | |
b86f59c7 | 445 | cpu_type = parse_cpu_option(cpu_model); |
031fe7af | 446 | |
2b5249b8 | 447 | /* init tcg before creating CPUs and to get qemu_host_page_size */ |
940e43aa | 448 | { |
3cfb0456 PM |
449 | AccelState *accel = current_accel(); |
450 | AccelClass *ac = ACCEL_GET_CLASS(accel); | |
2b5249b8 | 451 | |
b86f59c7 | 452 | accel_init_interfaces(ac); |
3cfb0456 PM |
453 | object_property_set_bool(OBJECT(accel), "one-insn-per-tb", |
454 | opt_one_insn_per_tb, &error_abort); | |
92242f34 | 455 | ac->init_machine(NULL); |
940e43aa | 456 | } |
ba379542 WL |
457 | |
458 | /* | |
459 | * Finalize page size before creating CPUs. | |
460 | * This will do nothing if !TARGET_PAGE_BITS_VARY. | |
461 | * The most efficient setting is to match the host. | |
462 | */ | |
463 | host_page_size = qemu_real_host_page_size(); | |
464 | set_preferred_target_page_bits(ctz32(host_page_size)); | |
465 | finalize_target_page_bits(); | |
466 | ||
2278b939 | 467 | cpu = cpu_create(cpu_type); |
b77af26e | 468 | env = cpu_env(cpu); |
db6b81d4 | 469 | cpu_reset(cpu); |
db6b81d4 | 470 | thread_cpu = cpu; |
84778508 | 471 | |
cb4c2590 WL |
472 | /* |
473 | * Reserving too much vm space via mmap can run into problems with rlimits, | |
474 | * oom due to page table creation, etc. We will still try it, if directed | |
475 | * by the command-line option, but not by default. Unless we're running a | |
476 | * target address space of 32 or fewer bits on a host with 64 bits. | |
477 | */ | |
478 | max_reserved_va = MAX_RESERVED_VA(cpu); | |
479 | if (reserved_va != 0) { | |
480 | if ((reserved_va + 1) % host_page_size) { | |
481 | char *s = size_to_str(host_page_size); | |
482 | fprintf(stderr, "Reserved virtual address not aligned mod %s\n", s); | |
483 | g_free(s); | |
484 | exit(EXIT_FAILURE); | |
485 | } | |
486 | if (max_reserved_va && reserved_va > max_reserved_va) { | |
487 | fprintf(stderr, "Reserved virtual address too big\n"); | |
488 | exit(EXIT_FAILURE); | |
489 | } | |
490 | } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { | |
491 | /* MAX_RESERVED_VA + 1 is a large power of 2, so is aligned. */ | |
492 | reserved_va = max_reserved_va; | |
493 | } | |
494 | ||
84778508 BS |
495 | if (getenv("QEMU_STRACE")) { |
496 | do_strace = 1; | |
497 | } | |
498 | ||
fc0d96b4 BS |
499 | target_environ = envlist_to_environ(envlist, NULL); |
500 | envlist_free(envlist); | |
501 | ||
03ecf078 WL |
502 | { |
503 | Error *err = NULL; | |
504 | if (seed_optarg != NULL) { | |
505 | qemu_guest_random_seed_main(seed_optarg, &err); | |
506 | } else { | |
507 | qcrypto_init(&err); | |
508 | } | |
509 | if (err) { | |
510 | error_reportf_err(err, "cannot initialize crypto: "); | |
511 | exit(1); | |
512 | } | |
513 | } | |
514 | ||
2fa5d9ba | 515 | /* |
fa79cde6 | 516 | * Now that page sizes are configured we can do |
2fa5d9ba BS |
517 | * proper page alignment for guest_base. |
518 | */ | |
28b61d49 RH |
519 | if (have_guest_base) { |
520 | if (guest_base & ~qemu_host_page_mask) { | |
521 | error_report("Selected guest base not host page aligned"); | |
522 | exit(1); | |
523 | } | |
524 | } | |
525 | ||
526 | /* | |
527 | * If reserving host virtual address space, do so now. | |
528 | * Combined with '-B', ensure that the chosen range is free. | |
529 | */ | |
530 | if (reserved_va) { | |
531 | void *p; | |
532 | ||
533 | if (have_guest_base) { | |
534 | p = mmap((void *)guest_base, reserved_va + 1, PROT_NONE, | |
535 | MAP_ANON | MAP_PRIVATE | MAP_FIXED | MAP_EXCL, -1, 0); | |
536 | } else { | |
537 | p = mmap(NULL, reserved_va + 1, PROT_NONE, | |
538 | MAP_ANON | MAP_PRIVATE, -1, 0); | |
539 | } | |
540 | if (p == MAP_FAILED) { | |
541 | const char *err = strerror(errno); | |
542 | char *sz = size_to_str(reserved_va + 1); | |
543 | ||
544 | if (have_guest_base) { | |
545 | error_report("Cannot allocate %s bytes at -B %p for guest " | |
546 | "address space: %s", sz, (void *)guest_base, err); | |
547 | } else { | |
548 | error_report("Cannot allocate %s bytes for guest " | |
549 | "address space: %s", sz, err); | |
550 | } | |
551 | exit(1); | |
552 | } | |
553 | guest_base = (uintptr_t)p; | |
554 | have_guest_base = true; | |
555 | ||
556 | /* Ensure that mmap_next_start is within range. */ | |
557 | if (reserved_va <= mmap_next_start) { | |
558 | mmap_next_start = (reserved_va / 4 * 3) | |
559 | & TARGET_PAGE_MASK & qemu_host_page_mask; | |
560 | } | |
561 | } | |
2fa5d9ba | 562 | |
d37853f9 WL |
563 | if (loader_exec(filename, argv + optind, target_environ, regs, info, |
564 | &bprm) != 0) { | |
84778508 BS |
565 | printf("Error loading %s\n", filename); |
566 | _exit(1); | |
567 | } | |
568 | ||
569 | for (wrk = target_environ; *wrk; wrk++) { | |
ec45bbe5 | 570 | g_free(*wrk); |
84778508 BS |
571 | } |
572 | ||
ec45bbe5 | 573 | g_free(target_environ); |
84778508 | 574 | |
13829020 | 575 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { |
43b76161 RH |
576 | FILE *f = qemu_log_trylock(); |
577 | if (f) { | |
578 | fprintf(f, "guest_base %p\n", (void *)guest_base); | |
579 | fprintf(f, "page layout changed following binary load\n"); | |
580 | page_dump(f); | |
581 | ||
43b76161 RH |
582 | fprintf(f, "end_code 0x" TARGET_ABI_FMT_lx "\n", |
583 | info->end_code); | |
584 | fprintf(f, "start_code 0x" TARGET_ABI_FMT_lx "\n", | |
585 | info->start_code); | |
586 | fprintf(f, "start_data 0x" TARGET_ABI_FMT_lx "\n", | |
587 | info->start_data); | |
588 | fprintf(f, "end_data 0x" TARGET_ABI_FMT_lx "\n", | |
589 | info->end_data); | |
590 | fprintf(f, "start_stack 0x" TARGET_ABI_FMT_lx "\n", | |
591 | info->start_stack); | |
592 | fprintf(f, "brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); | |
593 | fprintf(f, "entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
594 | ||
595 | qemu_log_unlock(f); | |
596 | } | |
2e77eac6 | 597 | } |
84778508 | 598 | |
031fe7af WL |
599 | /* build Task State */ |
600 | ts = g_new0(TaskState, 1); | |
601 | init_task_state(ts); | |
602 | ts->info = info; | |
603 | ts->bprm = &bprm; | |
604 | cpu->opaque = ts; | |
605 | ||
84778508 BS |
606 | target_set_brk(info->brk); |
607 | syscall_init(); | |
608 | signal_init(); | |
609 | ||
34bc8475 WL |
610 | /* |
611 | * Now that we've loaded the binary, GUEST_BASE is fixed. Delay | |
612 | * generating the prologue until now so that the prologue can take | |
613 | * the real value of GUEST_BASE into account. | |
614 | */ | |
935f75ae | 615 | tcg_prologue_init(); |
9002ec79 | 616 | |
031fe7af | 617 | target_cpu_init(env, regs); |
84778508 | 618 | |
fcedd920 AB |
619 | if (gdbstub) { |
620 | gdbserver_start(gdbstub); | |
f84e313e | 621 | gdb_handlesig(cpu, 0, NULL, NULL, 0); |
84778508 | 622 | } |
78cfb07f | 623 | cpu_loop(env); |
84778508 BS |
624 | /* never exits */ |
625 | return 0; | |
626 | } |