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Commit | Line | Data |
---|---|---|
31e31b8a | 1 | /* |
93ac68bc | 2 | * qemu user main |
5fafdf24 | 3 | * |
68d0f70e | 4 | * Copyright (c) 2003-2008 Fabrice Bellard |
31e31b8a FB |
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 | |
8167ee88 | 17 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
31e31b8a | 18 | */ |
14a48c1d | 19 | |
d39594e9 | 20 | #include "qemu/osdep.h" |
a8d25326 | 21 | #include "qemu-common.h" |
b52713c1 | 22 | #include "qemu/units.h" |
940e43aa | 23 | #include "qemu/accel.h" |
14a48c1d | 24 | #include "sysemu/tcg.h" |
67a1de0d | 25 | #include "qemu-version.h" |
edf8e2af | 26 | #include <sys/syscall.h> |
703e0e89 | 27 | #include <sys/resource.h> |
ee947430 | 28 | #include <sys/shm.h> |
6e1c0d7b | 29 | #include <linux/binfmts.h> |
31e31b8a | 30 | |
daa76aa4 | 31 | #include "qapi/error.h" |
3ef693a0 | 32 | #include "qemu.h" |
f348b6d1 | 33 | #include "qemu/path.h" |
dc5e9ac7 | 34 | #include "qemu/queue.h" |
6533dd6e | 35 | #include "qemu/config-file.h" |
f348b6d1 | 36 | #include "qemu/cutils.h" |
f5852efa | 37 | #include "qemu/error-report.h" |
f348b6d1 | 38 | #include "qemu/help_option.h" |
0b8fa32f | 39 | #include "qemu/module.h" |
f308f64e | 40 | #include "qemu/plugin.h" |
63c91552 | 41 | #include "exec/exec-all.h" |
dcb32f1d | 42 | #include "tcg/tcg.h" |
1de7afc9 PB |
43 | #include "qemu/timer.h" |
44 | #include "qemu/envlist.h" | |
5ebdd774 | 45 | #include "qemu/guest-random.h" |
d8fd2954 | 46 | #include "elf.h" |
6533dd6e | 47 | #include "trace/control.h" |
542ca434 | 48 | #include "target_elf.h" |
cd71c089 | 49 | #include "cpu_loop-common.h" |
a573e9ba | 50 | #include "crypto/init.h" |
04a6dfeb | 51 | |
6e1c0d7b LV |
52 | #ifndef AT_FLAGS_PRESERVE_ARGV0 |
53 | #define AT_FLAGS_PRESERVE_ARGV0_BIT 0 | |
54 | #define AT_FLAGS_PRESERVE_ARGV0 (1 << AT_FLAGS_PRESERVE_ARGV0_BIT) | |
55 | #endif | |
56 | ||
d088d664 AJ |
57 | char *exec_path; |
58 | ||
1b530a6d | 59 | int singlestep; |
8cb76755 | 60 | static const char *argv0; |
fcedd920 | 61 | static const char *gdbstub; |
8cb76755 | 62 | static envlist_t *envlist; |
51fb256a | 63 | static const char *cpu_model; |
2278b939 | 64 | static const char *cpu_type; |
5ebdd774 | 65 | static const char *seed_optarg; |
379f6698 | 66 | unsigned long mmap_min_addr; |
5ca870b9 | 67 | uintptr_t guest_base; |
e307c192 | 68 | bool have_guest_base; |
120a9848 | 69 | |
4b25a506 JK |
70 | /* |
71 | * Used to implement backwards-compatibility for the `-strace`, and | |
72 | * QEMU_STRACE options. Without this, the QEMU_LOG can be overwritten by | |
73 | * -strace, or vice versa. | |
74 | */ | |
75 | static bool enable_strace; | |
76 | ||
77 | /* | |
78 | * The last log mask given by the user in an environment variable or argument. | |
79 | * Used to support command line arguments overriding environment variables. | |
80 | */ | |
81 | static int last_log_mask; | |
82 | ||
288e65b9 AG |
83 | /* |
84 | * When running 32-on-64 we should make sure we can fit all of the possible | |
85 | * guest address space into a contiguous chunk of virtual host memory. | |
86 | * | |
87 | * This way we will never overlap with our own libraries or binaries or stack | |
88 | * or anything else that QEMU maps. | |
18e80c55 RH |
89 | * |
90 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
91 | * of the address for the kernel. Some cpus rely on this and user space | |
92 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
93 | * must preserve the expected address space. | |
288e65b9 | 94 | */ |
18e80c55 RH |
95 | #ifndef MAX_RESERVED_VA |
96 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
97 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
98 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
99 | /* There are a number of places where we assign reserved_va to a variable | |
100 | of type abi_ulong and expect it to fit. Avoid the last page. */ | |
8f67b9c6 | 101 | # define MAX_RESERVED_VA(CPU) (0xfffffffful & TARGET_PAGE_MASK) |
18e80c55 | 102 | # else |
8f67b9c6 | 103 | # define MAX_RESERVED_VA(CPU) (1ul << TARGET_VIRT_ADDR_SPACE_BITS) |
18e80c55 | 104 | # endif |
314992b1 | 105 | # else |
8f67b9c6 | 106 | # define MAX_RESERVED_VA(CPU) 0 |
314992b1 | 107 | # endif |
18e80c55 RH |
108 | #endif |
109 | ||
68a1c816 | 110 | unsigned long reserved_va; |
1b530a6d | 111 | |
d03f9c32 | 112 | static void usage(int exitcode); |
fc9c5412 | 113 | |
7ee2822c | 114 | static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; |
e586822a | 115 | const char *qemu_uname_release; |
586314f2 | 116 | |
9de5e440 FB |
117 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so |
118 | we allocate a bigger stack. Need a better solution, for example | |
119 | by remapping the process stack directly at the right place */ | |
703e0e89 | 120 | unsigned long guest_stack_size = 8 * 1024 * 1024UL; |
31e31b8a | 121 | |
8fcd3692 | 122 | #if defined(TARGET_I386) |
05390248 | 123 | int cpu_get_pic_interrupt(CPUX86State *env) |
92ccca6a FB |
124 | { |
125 | return -1; | |
126 | } | |
8fcd3692 | 127 | #endif |
92ccca6a | 128 | |
d5975363 PB |
129 | /***********************************************************/ |
130 | /* Helper routines for implementing atomic operations. */ | |
131 | ||
d5975363 PB |
132 | /* Make sure everything is in a consistent state for calling fork(). */ |
133 | void fork_start(void) | |
134 | { | |
06065c45 | 135 | start_exclusive(); |
d032d1b4 | 136 | mmap_fork_start(); |
024949ca | 137 | cpu_list_lock(); |
d5975363 PB |
138 | } |
139 | ||
140 | void fork_end(int child) | |
141 | { | |
d032d1b4 | 142 | mmap_fork_end(child); |
d5975363 | 143 | if (child) { |
bdc44640 | 144 | CPUState *cpu, *next_cpu; |
d5975363 PB |
145 | /* Child processes created by fork() only have a single thread. |
146 | Discard information about the parent threads. */ | |
bdc44640 AF |
147 | CPU_FOREACH_SAFE(cpu, next_cpu) { |
148 | if (cpu != thread_cpu) { | |
068a5ea0 | 149 | QTAILQ_REMOVE_RCU(&cpus, cpu, node); |
bdc44640 AF |
150 | } |
151 | } | |
267f685b | 152 | qemu_init_cpu_list(); |
f7ec7f7b | 153 | gdbserver_fork(thread_cpu); |
06065c45 PM |
154 | /* qemu_init_cpu_list() takes care of reinitializing the |
155 | * exclusive state, so we don't need to end_exclusive() here. | |
156 | */ | |
d5975363 | 157 | } else { |
267f685b | 158 | cpu_list_unlock(); |
06065c45 | 159 | end_exclusive(); |
d5975363 | 160 | } |
d5975363 PB |
161 | } |
162 | ||
b44316fb | 163 | __thread CPUState *thread_cpu; |
59faf6d6 | 164 | |
178f9429 SF |
165 | bool qemu_cpu_is_self(CPUState *cpu) |
166 | { | |
167 | return thread_cpu == cpu; | |
168 | } | |
169 | ||
170 | void qemu_cpu_kick(CPUState *cpu) | |
171 | { | |
172 | cpu_exit(cpu); | |
173 | } | |
174 | ||
edf8e2af MW |
175 | void task_settid(TaskState *ts) |
176 | { | |
177 | if (ts->ts_tid == 0) { | |
edf8e2af | 178 | ts->ts_tid = (pid_t)syscall(SYS_gettid); |
edf8e2af MW |
179 | } |
180 | } | |
181 | ||
182 | void stop_all_tasks(void) | |
183 | { | |
184 | /* | |
185 | * We trust that when using NPTL, start_exclusive() | |
186 | * handles thread stopping correctly. | |
187 | */ | |
188 | start_exclusive(); | |
189 | } | |
190 | ||
c3a92833 | 191 | /* Assumes contents are already zeroed. */ |
624f7979 PB |
192 | void init_task_state(TaskState *ts) |
193 | { | |
624f7979 | 194 | ts->used = 1; |
5bfce0b7 PM |
195 | ts->sigaltstack_used = (struct target_sigaltstack) { |
196 | .ss_sp = 0, | |
197 | .ss_size = 0, | |
198 | .ss_flags = TARGET_SS_DISABLE, | |
199 | }; | |
624f7979 | 200 | } |
fc9c5412 | 201 | |
30ba0ee5 AF |
202 | CPUArchState *cpu_copy(CPUArchState *env) |
203 | { | |
29a0af61 | 204 | CPUState *cpu = env_cpu(env); |
2278b939 | 205 | CPUState *new_cpu = cpu_create(cpu_type); |
61c7480f | 206 | CPUArchState *new_env = new_cpu->env_ptr; |
30ba0ee5 AF |
207 | CPUBreakpoint *bp; |
208 | CPUWatchpoint *wp; | |
30ba0ee5 AF |
209 | |
210 | /* Reset non arch specific state */ | |
75a34036 | 211 | cpu_reset(new_cpu); |
30ba0ee5 | 212 | |
6cc9d67c | 213 | new_cpu->tcg_cflags = cpu->tcg_cflags; |
30ba0ee5 AF |
214 | memcpy(new_env, env, sizeof(CPUArchState)); |
215 | ||
216 | /* Clone all break/watchpoints. | |
217 | Note: Once we support ptrace with hw-debug register access, make sure | |
218 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1d085f6c TB |
219 | QTAILQ_INIT(&new_cpu->breakpoints); |
220 | QTAILQ_INIT(&new_cpu->watchpoints); | |
f0c3c505 | 221 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
b3310ab3 | 222 | cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); |
30ba0ee5 | 223 | } |
ff4700b0 | 224 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
05068c0d | 225 | cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); |
30ba0ee5 | 226 | } |
30ba0ee5 AF |
227 | |
228 | return new_env; | |
229 | } | |
230 | ||
fc9c5412 JS |
231 | static void handle_arg_help(const char *arg) |
232 | { | |
4d1275c2 | 233 | usage(EXIT_SUCCESS); |
fc9c5412 JS |
234 | } |
235 | ||
236 | static void handle_arg_log(const char *arg) | |
237 | { | |
4b25a506 JK |
238 | last_log_mask = qemu_str_to_log_mask(arg); |
239 | if (!last_log_mask) { | |
59a6fa6e | 240 | qemu_print_log_usage(stdout); |
4d1275c2 | 241 | exit(EXIT_FAILURE); |
fc9c5412 | 242 | } |
fc9c5412 JS |
243 | } |
244 | ||
8423fa90 AB |
245 | static void handle_arg_dfilter(const char *arg) |
246 | { | |
7f4341e8 | 247 | qemu_set_dfilter_ranges(arg, &error_fatal); |
8423fa90 AB |
248 | } |
249 | ||
50171d42 CWR |
250 | static void handle_arg_log_filename(const char *arg) |
251 | { | |
daa76aa4 | 252 | qemu_set_log_filename(arg, &error_fatal); |
50171d42 CWR |
253 | } |
254 | ||
fc9c5412 JS |
255 | static void handle_arg_set_env(const char *arg) |
256 | { | |
257 | char *r, *p, *token; | |
258 | r = p = strdup(arg); | |
259 | while ((token = strsep(&p, ",")) != NULL) { | |
260 | if (envlist_setenv(envlist, token) != 0) { | |
4d1275c2 | 261 | usage(EXIT_FAILURE); |
fc9c5412 JS |
262 | } |
263 | } | |
264 | free(r); | |
265 | } | |
266 | ||
267 | static void handle_arg_unset_env(const char *arg) | |
268 | { | |
269 | char *r, *p, *token; | |
270 | r = p = strdup(arg); | |
271 | while ((token = strsep(&p, ",")) != NULL) { | |
272 | if (envlist_unsetenv(envlist, token) != 0) { | |
4d1275c2 | 273 | usage(EXIT_FAILURE); |
fc9c5412 JS |
274 | } |
275 | } | |
276 | free(r); | |
277 | } | |
278 | ||
279 | static void handle_arg_argv0(const char *arg) | |
280 | { | |
281 | argv0 = strdup(arg); | |
282 | } | |
283 | ||
284 | static void handle_arg_stack_size(const char *arg) | |
285 | { | |
286 | char *p; | |
287 | guest_stack_size = strtoul(arg, &p, 0); | |
288 | if (guest_stack_size == 0) { | |
4d1275c2 | 289 | usage(EXIT_FAILURE); |
fc9c5412 JS |
290 | } |
291 | ||
292 | if (*p == 'M') { | |
b52713c1 | 293 | guest_stack_size *= MiB; |
fc9c5412 | 294 | } else if (*p == 'k' || *p == 'K') { |
b52713c1 | 295 | guest_stack_size *= KiB; |
fc9c5412 JS |
296 | } |
297 | } | |
298 | ||
299 | static void handle_arg_ld_prefix(const char *arg) | |
300 | { | |
301 | interp_prefix = strdup(arg); | |
302 | } | |
303 | ||
304 | static void handle_arg_pagesize(const char *arg) | |
305 | { | |
306 | qemu_host_page_size = atoi(arg); | |
307 | if (qemu_host_page_size == 0 || | |
308 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
309 | fprintf(stderr, "page size must be a power of two\n"); | |
4d1275c2 | 310 | exit(EXIT_FAILURE); |
fc9c5412 JS |
311 | } |
312 | } | |
313 | ||
5ebdd774 | 314 | static void handle_arg_seed(const char *arg) |
c5e4a5a9 | 315 | { |
5ebdd774 | 316 | seed_optarg = arg; |
c5e4a5a9 MR |
317 | } |
318 | ||
fc9c5412 JS |
319 | static void handle_arg_gdb(const char *arg) |
320 | { | |
fcedd920 | 321 | gdbstub = g_strdup(arg); |
fc9c5412 JS |
322 | } |
323 | ||
324 | static void handle_arg_uname(const char *arg) | |
325 | { | |
326 | qemu_uname_release = strdup(arg); | |
327 | } | |
328 | ||
329 | static void handle_arg_cpu(const char *arg) | |
330 | { | |
331 | cpu_model = strdup(arg); | |
c8057f95 | 332 | if (cpu_model == NULL || is_help_option(cpu_model)) { |
fc9c5412 | 333 | /* XXX: implement xxx_cpu_list for targets that still miss it */ |
e916cbf8 | 334 | #if defined(cpu_list) |
0442428a | 335 | cpu_list(); |
fc9c5412 | 336 | #endif |
4d1275c2 | 337 | exit(EXIT_FAILURE); |
fc9c5412 JS |
338 | } |
339 | } | |
340 | ||
fc9c5412 JS |
341 | static void handle_arg_guest_base(const char *arg) |
342 | { | |
343 | guest_base = strtol(arg, NULL, 0); | |
e307c192 | 344 | have_guest_base = true; |
fc9c5412 JS |
345 | } |
346 | ||
347 | static void handle_arg_reserved_va(const char *arg) | |
348 | { | |
349 | char *p; | |
350 | int shift = 0; | |
351 | reserved_va = strtoul(arg, &p, 0); | |
352 | switch (*p) { | |
353 | case 'k': | |
354 | case 'K': | |
355 | shift = 10; | |
356 | break; | |
357 | case 'M': | |
358 | shift = 20; | |
359 | break; | |
360 | case 'G': | |
361 | shift = 30; | |
362 | break; | |
363 | } | |
364 | if (shift) { | |
365 | unsigned long unshifted = reserved_va; | |
366 | p++; | |
367 | reserved_va <<= shift; | |
8f67b9c6 | 368 | if (reserved_va >> shift != unshifted) { |
fc9c5412 | 369 | fprintf(stderr, "Reserved virtual address too big\n"); |
4d1275c2 | 370 | exit(EXIT_FAILURE); |
fc9c5412 JS |
371 | } |
372 | } | |
373 | if (*p) { | |
374 | fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); | |
4d1275c2 | 375 | exit(EXIT_FAILURE); |
fc9c5412 JS |
376 | } |
377 | } | |
fc9c5412 JS |
378 | |
379 | static void handle_arg_singlestep(const char *arg) | |
380 | { | |
381 | singlestep = 1; | |
382 | } | |
383 | ||
384 | static void handle_arg_strace(const char *arg) | |
385 | { | |
4b25a506 | 386 | enable_strace = true; |
fc9c5412 JS |
387 | } |
388 | ||
389 | static void handle_arg_version(const char *arg) | |
390 | { | |
7e563bfb | 391 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION |
0781dd6e | 392 | "\n" QEMU_COPYRIGHT "\n"); |
4d1275c2 | 393 | exit(EXIT_SUCCESS); |
fc9c5412 JS |
394 | } |
395 | ||
6533dd6e LV |
396 | static void handle_arg_trace(const char *arg) |
397 | { | |
92eecfff | 398 | trace_opt_parse(arg); |
6533dd6e LV |
399 | } |
400 | ||
130ea832 MF |
401 | #if defined(TARGET_XTENSA) |
402 | static void handle_arg_abi_call0(const char *arg) | |
403 | { | |
404 | xtensa_set_abi_call0(); | |
405 | } | |
406 | #endif | |
407 | ||
f308f64e LV |
408 | static QemuPluginList plugins = QTAILQ_HEAD_INITIALIZER(plugins); |
409 | ||
410 | #ifdef CONFIG_PLUGIN | |
411 | static void handle_arg_plugin(const char *arg) | |
412 | { | |
413 | qemu_plugin_opt_parse(arg, &plugins); | |
414 | } | |
415 | #endif | |
416 | ||
fc9c5412 JS |
417 | struct qemu_argument { |
418 | const char *argv; | |
419 | const char *env; | |
420 | bool has_arg; | |
421 | void (*handle_opt)(const char *arg); | |
422 | const char *example; | |
423 | const char *help; | |
424 | }; | |
425 | ||
42644cee | 426 | static const struct qemu_argument arg_table[] = { |
fc9c5412 JS |
427 | {"h", "", false, handle_arg_help, |
428 | "", "print this help"}, | |
daaf8c8e MI |
429 | {"help", "", false, handle_arg_help, |
430 | "", ""}, | |
fc9c5412 JS |
431 | {"g", "QEMU_GDB", true, handle_arg_gdb, |
432 | "port", "wait gdb connection to 'port'"}, | |
433 | {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, | |
434 | "path", "set the elf interpreter prefix to 'path'"}, | |
435 | {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, | |
436 | "size", "set the stack size to 'size' bytes"}, | |
437 | {"cpu", "QEMU_CPU", true, handle_arg_cpu, | |
c8057f95 | 438 | "model", "select CPU (-cpu help for list)"}, |
fc9c5412 JS |
439 | {"E", "QEMU_SET_ENV", true, handle_arg_set_env, |
440 | "var=value", "sets targets environment variable (see below)"}, | |
441 | {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, | |
442 | "var", "unsets targets environment variable (see below)"}, | |
443 | {"0", "QEMU_ARGV0", true, handle_arg_argv0, | |
444 | "argv0", "forces target process argv[0] to be 'argv0'"}, | |
445 | {"r", "QEMU_UNAME", true, handle_arg_uname, | |
446 | "uname", "set qemu uname release string to 'uname'"}, | |
fc9c5412 JS |
447 | {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, |
448 | "address", "set guest_base address to 'address'"}, | |
449 | {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, | |
450 | "size", "reserve 'size' bytes for guest virtual address space"}, | |
fc9c5412 | 451 | {"d", "QEMU_LOG", true, handle_arg_log, |
989b697d PM |
452 | "item[,...]", "enable logging of specified items " |
453 | "(use '-d help' for a list of items)"}, | |
8423fa90 AB |
454 | {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, |
455 | "range[,...]","filter logging based on address range"}, | |
50171d42 | 456 | {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, |
989b697d | 457 | "logfile", "write logs to 'logfile' (default stderr)"}, |
fc9c5412 JS |
458 | {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, |
459 | "pagesize", "set the host page size to 'pagesize'"}, | |
460 | {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, | |
461 | "", "run in singlestep mode"}, | |
462 | {"strace", "QEMU_STRACE", false, handle_arg_strace, | |
463 | "", "log system calls"}, | |
5ebdd774 | 464 | {"seed", "QEMU_RAND_SEED", true, handle_arg_seed, |
c5e4a5a9 | 465 | "", "Seed for pseudo-random number generator"}, |
6533dd6e LV |
466 | {"trace", "QEMU_TRACE", true, handle_arg_trace, |
467 | "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, | |
f308f64e LV |
468 | #ifdef CONFIG_PLUGIN |
469 | {"plugin", "QEMU_PLUGIN", true, handle_arg_plugin, | |
470 | "", "[file=]<file>[,arg=<string>]"}, | |
471 | #endif | |
fc9c5412 | 472 | {"version", "QEMU_VERSION", false, handle_arg_version, |
1386d4c0 | 473 | "", "display version information and exit"}, |
130ea832 MF |
474 | #if defined(TARGET_XTENSA) |
475 | {"xtensa-abi-call0", "QEMU_XTENSA_ABI_CALL0", false, handle_arg_abi_call0, | |
476 | "", "assume CALL0 Xtensa ABI"}, | |
477 | #endif | |
fc9c5412 JS |
478 | {NULL, NULL, false, NULL, NULL, NULL} |
479 | }; | |
480 | ||
d03f9c32 | 481 | static void usage(int exitcode) |
fc9c5412 | 482 | { |
42644cee | 483 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
484 | int maxarglen; |
485 | int maxenvlen; | |
486 | ||
2e59915d PB |
487 | printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" |
488 | "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" | |
fc9c5412 JS |
489 | "\n" |
490 | "Options and associated environment variables:\n" | |
491 | "\n"); | |
492 | ||
63ec54d7 PM |
493 | /* Calculate column widths. We must always have at least enough space |
494 | * for the column header. | |
495 | */ | |
496 | maxarglen = strlen("Argument"); | |
497 | maxenvlen = strlen("Env-variable"); | |
fc9c5412 JS |
498 | |
499 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
63ec54d7 PM |
500 | int arglen = strlen(arginfo->argv); |
501 | if (arginfo->has_arg) { | |
502 | arglen += strlen(arginfo->example) + 1; | |
503 | } | |
fc9c5412 JS |
504 | if (strlen(arginfo->env) > maxenvlen) { |
505 | maxenvlen = strlen(arginfo->env); | |
506 | } | |
63ec54d7 PM |
507 | if (arglen > maxarglen) { |
508 | maxarglen = arglen; | |
fc9c5412 JS |
509 | } |
510 | } | |
511 | ||
63ec54d7 PM |
512 | printf("%-*s %-*s Description\n", maxarglen+1, "Argument", |
513 | maxenvlen, "Env-variable"); | |
fc9c5412 JS |
514 | |
515 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
516 | if (arginfo->has_arg) { | |
517 | printf("-%s %-*s %-*s %s\n", arginfo->argv, | |
63ec54d7 PM |
518 | (int)(maxarglen - strlen(arginfo->argv) - 1), |
519 | arginfo->example, maxenvlen, arginfo->env, arginfo->help); | |
fc9c5412 | 520 | } else { |
63ec54d7 | 521 | printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, |
fc9c5412 JS |
522 | maxenvlen, arginfo->env, |
523 | arginfo->help); | |
524 | } | |
525 | } | |
526 | ||
527 | printf("\n" | |
528 | "Defaults:\n" | |
529 | "QEMU_LD_PREFIX = %s\n" | |
989b697d | 530 | "QEMU_STACK_SIZE = %ld byte\n", |
fc9c5412 | 531 | interp_prefix, |
989b697d | 532 | guest_stack_size); |
fc9c5412 JS |
533 | |
534 | printf("\n" | |
535 | "You can use -E and -U options or the QEMU_SET_ENV and\n" | |
536 | "QEMU_UNSET_ENV environment variables to set and unset\n" | |
537 | "environment variables for the target process.\n" | |
538 | "It is possible to provide several variables by separating them\n" | |
539 | "by commas in getsubopt(3) style. Additionally it is possible to\n" | |
540 | "provide the -E and -U options multiple times.\n" | |
541 | "The following lines are equivalent:\n" | |
542 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
543 | " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" | |
544 | " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" | |
545 | "Note that if you provide several changes to a single variable\n" | |
f5048cb7 EB |
546 | "the last change will stay in effect.\n" |
547 | "\n" | |
548 | QEMU_HELP_BOTTOM "\n"); | |
fc9c5412 | 549 | |
d03f9c32 | 550 | exit(exitcode); |
fc9c5412 JS |
551 | } |
552 | ||
553 | static int parse_args(int argc, char **argv) | |
554 | { | |
555 | const char *r; | |
556 | int optind; | |
42644cee | 557 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
558 | |
559 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
560 | if (arginfo->env == NULL) { | |
561 | continue; | |
562 | } | |
563 | ||
564 | r = getenv(arginfo->env); | |
565 | if (r != NULL) { | |
566 | arginfo->handle_opt(r); | |
567 | } | |
568 | } | |
569 | ||
570 | optind = 1; | |
571 | for (;;) { | |
572 | if (optind >= argc) { | |
573 | break; | |
574 | } | |
575 | r = argv[optind]; | |
576 | if (r[0] != '-') { | |
577 | break; | |
578 | } | |
579 | optind++; | |
580 | r++; | |
581 | if (!strcmp(r, "-")) { | |
582 | break; | |
583 | } | |
ba02577c MI |
584 | /* Treat --foo the same as -foo. */ |
585 | if (r[0] == '-') { | |
586 | r++; | |
587 | } | |
fc9c5412 JS |
588 | |
589 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
590 | if (!strcmp(r, arginfo->argv)) { | |
fc9c5412 | 591 | if (arginfo->has_arg) { |
1386d4c0 | 592 | if (optind >= argc) { |
138940bf MI |
593 | (void) fprintf(stderr, |
594 | "qemu: missing argument for option '%s'\n", r); | |
4d1275c2 | 595 | exit(EXIT_FAILURE); |
1386d4c0 PM |
596 | } |
597 | arginfo->handle_opt(argv[optind]); | |
fc9c5412 | 598 | optind++; |
1386d4c0 PM |
599 | } else { |
600 | arginfo->handle_opt(NULL); | |
fc9c5412 | 601 | } |
fc9c5412 JS |
602 | break; |
603 | } | |
604 | } | |
605 | ||
606 | /* no option matched the current argv */ | |
607 | if (arginfo->handle_opt == NULL) { | |
138940bf | 608 | (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); |
4d1275c2 | 609 | exit(EXIT_FAILURE); |
fc9c5412 JS |
610 | } |
611 | } | |
612 | ||
613 | if (optind >= argc) { | |
138940bf | 614 | (void) fprintf(stderr, "qemu: no user program specified\n"); |
4d1275c2 | 615 | exit(EXIT_FAILURE); |
fc9c5412 JS |
616 | } |
617 | ||
fc9c5412 JS |
618 | exec_path = argv[optind]; |
619 | ||
620 | return optind; | |
621 | } | |
622 | ||
902b3d5c | 623 | int main(int argc, char **argv, char **envp) |
31e31b8a | 624 | { |
01ffc75b | 625 | struct target_pt_regs regs1, *regs = ®s1; |
31e31b8a | 626 | struct image_info info1, *info = &info1; |
edf8e2af | 627 | struct linux_binprm bprm; |
48e15fc2 | 628 | TaskState *ts; |
9349b4f9 | 629 | CPUArchState *env; |
db6b81d4 | 630 | CPUState *cpu; |
586314f2 | 631 | int optind; |
04a6dfeb | 632 | char **target_environ, **wrk; |
7d8cec95 AJ |
633 | char **target_argv; |
634 | int target_argc; | |
7d8cec95 | 635 | int i; |
fd4d81dd | 636 | int ret; |
03cfd8fa | 637 | int execfd; |
4b25a506 | 638 | int log_mask; |
8f67b9c6 | 639 | unsigned long max_reserved_va; |
6e1c0d7b | 640 | bool preserve_argv0; |
b12b6a18 | 641 | |
f5852efa | 642 | error_init(argv[0]); |
fe4db84d | 643 | module_call_init(MODULE_INIT_TRACE); |
267f685b | 644 | qemu_init_cpu_list(); |
ce008c1f AF |
645 | module_call_init(MODULE_INIT_QOM); |
646 | ||
ec45bbe5 | 647 | envlist = envlist_create(); |
04a6dfeb AJ |
648 | |
649 | /* add current environment into the list */ | |
650 | for (wrk = environ; *wrk != NULL; wrk++) { | |
651 | (void) envlist_setenv(envlist, *wrk); | |
652 | } | |
653 | ||
703e0e89 RH |
654 | /* Read the stack limit from the kernel. If it's "unlimited", |
655 | then we can do little else besides use the default. */ | |
656 | { | |
657 | struct rlimit lim; | |
658 | if (getrlimit(RLIMIT_STACK, &lim) == 0 | |
81bbe906 TY |
659 | && lim.rlim_cur != RLIM_INFINITY |
660 | && lim.rlim_cur == (target_long)lim.rlim_cur) { | |
703e0e89 RH |
661 | guest_stack_size = lim.rlim_cur; |
662 | } | |
663 | } | |
664 | ||
b1f9be31 | 665 | cpu_model = NULL; |
b5ec5ce0 | 666 | |
6533dd6e | 667 | qemu_add_opts(&qemu_trace_opts); |
f308f64e | 668 | qemu_plugin_add_opts(); |
6533dd6e | 669 | |
fc9c5412 | 670 | optind = parse_args(argc, argv); |
586314f2 | 671 | |
4b25a506 JK |
672 | log_mask = last_log_mask | (enable_strace ? LOG_STRACE : 0); |
673 | if (log_mask) { | |
674 | qemu_log_needs_buffers(); | |
675 | qemu_set_log(log_mask); | |
676 | } | |
677 | ||
6533dd6e LV |
678 | if (!trace_init_backends()) { |
679 | exit(1); | |
680 | } | |
92eecfff | 681 | trace_init_file(); |
0572f558 | 682 | qemu_plugin_load_list(&plugins, &error_fatal); |
6533dd6e | 683 | |
31e31b8a | 684 | /* Zero out regs */ |
01ffc75b | 685 | memset(regs, 0, sizeof(struct target_pt_regs)); |
31e31b8a FB |
686 | |
687 | /* Zero out image_info */ | |
688 | memset(info, 0, sizeof(struct image_info)); | |
689 | ||
edf8e2af MW |
690 | memset(&bprm, 0, sizeof (bprm)); |
691 | ||
74cd30b8 FB |
692 | /* Scan interp_prefix dir for replacement files. */ |
693 | init_paths(interp_prefix); | |
694 | ||
4a24a758 PM |
695 | init_qemu_uname_release(); |
696 | ||
6e1c0d7b LV |
697 | /* |
698 | * Manage binfmt-misc open-binary flag | |
699 | */ | |
768fe76e YS |
700 | execfd = qemu_getauxval(AT_EXECFD); |
701 | if (execfd == 0) { | |
9d3019bc | 702 | execfd = open(exec_path, O_RDONLY); |
768fe76e | 703 | if (execfd < 0) { |
9d3019bc | 704 | printf("Error while loading %s: %s\n", exec_path, strerror(errno)); |
768fe76e YS |
705 | _exit(EXIT_FAILURE); |
706 | } | |
707 | } | |
708 | ||
6e1c0d7b LV |
709 | /* |
710 | * get binfmt_misc flags | |
711 | */ | |
712 | preserve_argv0 = !!(qemu_getauxval(AT_FLAGS) & AT_FLAGS_PRESERVE_ARGV0); | |
713 | ||
714 | /* | |
715 | * Manage binfmt-misc preserve-arg[0] flag | |
716 | * argv[optind] full path to the binary | |
717 | * argv[optind + 1] original argv[0] | |
718 | */ | |
719 | if (optind + 1 < argc && preserve_argv0) { | |
720 | optind++; | |
721 | } | |
722 | ||
46027c07 | 723 | if (cpu_model == NULL) { |
768fe76e | 724 | cpu_model = cpu_get_model(get_elf_eflags(execfd)); |
aaed909a | 725 | } |
c1c8cfe5 | 726 | cpu_type = parse_cpu_option(cpu_model); |
2278b939 | 727 | |
2b5249b8 | 728 | /* init tcg before creating CPUs and to get qemu_host_page_size */ |
940e43aa CF |
729 | { |
730 | AccelClass *ac = ACCEL_GET_CLASS(current_accel()); | |
2278b939 | 731 | |
940e43aa | 732 | ac->init_machine(NULL); |
b86f59c7 | 733 | accel_init_interfaces(ac); |
940e43aa | 734 | } |
2278b939 | 735 | cpu = cpu_create(cpu_type); |
2994fd96 | 736 | env = cpu->env_ptr; |
0ac46af3 | 737 | cpu_reset(cpu); |
db6b81d4 | 738 | thread_cpu = cpu; |
3b46e624 | 739 | |
8f67b9c6 RH |
740 | /* |
741 | * Reserving too much vm space via mmap can run into problems | |
742 | * with rlimits, oom due to page table creation, etc. We will | |
743 | * still try it, if directed by the command-line option, but | |
744 | * not by default. | |
745 | */ | |
746 | max_reserved_va = MAX_RESERVED_VA(cpu); | |
747 | if (reserved_va != 0) { | |
748 | if (max_reserved_va && reserved_va > max_reserved_va) { | |
749 | fprintf(stderr, "Reserved virtual address too big\n"); | |
750 | exit(EXIT_FAILURE); | |
751 | } | |
752 | } else if (HOST_LONG_BITS == 64 && TARGET_VIRT_ADDR_SPACE_BITS <= 32) { | |
753 | /* | |
754 | * reserved_va must be aligned with the host page size | |
755 | * as it is used with mmap() | |
756 | */ | |
757 | reserved_va = max_reserved_va & qemu_host_page_mask; | |
758 | } | |
759 | ||
a573e9ba RH |
760 | { |
761 | Error *err = NULL; | |
762 | if (seed_optarg != NULL) { | |
a573e9ba RH |
763 | qemu_guest_random_seed_main(seed_optarg, &err); |
764 | } else { | |
765 | qcrypto_init(&err); | |
766 | } | |
767 | if (err) { | |
768 | error_reportf_err(err, "cannot initialize crypto: "); | |
769 | exit(1); | |
5ebdd774 | 770 | } |
c5e4a5a9 MR |
771 | } |
772 | ||
04a6dfeb AJ |
773 | target_environ = envlist_to_environ(envlist, NULL); |
774 | envlist_free(envlist); | |
b12b6a18 | 775 | |
379f6698 PB |
776 | /* |
777 | * Read in mmap_min_addr kernel parameter. This value is used | |
778 | * When loading the ELF image to determine whether guest_base | |
14f24e14 | 779 | * is needed. It is also used in mmap_find_vma. |
379f6698 | 780 | */ |
14f24e14 | 781 | { |
379f6698 PB |
782 | FILE *fp; |
783 | ||
784 | if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { | |
785 | unsigned long tmp; | |
c9f80666 | 786 | if (fscanf(fp, "%lu", &tmp) == 1 && tmp != 0) { |
379f6698 | 787 | mmap_min_addr = tmp; |
c9f80666 RH |
788 | qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", |
789 | mmap_min_addr); | |
379f6698 PB |
790 | } |
791 | fclose(fp); | |
792 | } | |
793 | } | |
379f6698 | 794 | |
c9f80666 RH |
795 | /* |
796 | * We prefer to not make NULL pointers accessible to QEMU. | |
797 | * If we're in a chroot with no /proc, fall back to 1 page. | |
798 | */ | |
799 | if (mmap_min_addr == 0) { | |
800 | mmap_min_addr = qemu_host_page_size; | |
801 | qemu_log_mask(CPU_LOG_PAGE, | |
802 | "host mmap_min_addr=0x%lx (fallback)\n", | |
803 | mmap_min_addr); | |
804 | } | |
805 | ||
7d8cec95 AJ |
806 | /* |
807 | * Prepare copy of argv vector for target. | |
808 | */ | |
809 | target_argc = argc - optind; | |
810 | target_argv = calloc(target_argc + 1, sizeof (char *)); | |
811 | if (target_argv == NULL) { | |
7d37435b PB |
812 | (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); |
813 | exit(EXIT_FAILURE); | |
7d8cec95 AJ |
814 | } |
815 | ||
816 | /* | |
817 | * If argv0 is specified (using '-0' switch) we replace | |
818 | * argv[0] pointer with the given one. | |
819 | */ | |
820 | i = 0; | |
821 | if (argv0 != NULL) { | |
822 | target_argv[i++] = strdup(argv0); | |
823 | } | |
824 | for (; i < target_argc; i++) { | |
825 | target_argv[i] = strdup(argv[optind + i]); | |
826 | } | |
827 | target_argv[target_argc] = NULL; | |
828 | ||
c78d65e8 | 829 | ts = g_new0(TaskState, 1); |
edf8e2af MW |
830 | init_task_state(ts); |
831 | /* build Task State */ | |
832 | ts->info = info; | |
833 | ts->bprm = &bprm; | |
0429a971 | 834 | cpu->opaque = ts; |
edf8e2af MW |
835 | task_settid(ts); |
836 | ||
9d3019bc | 837 | ret = loader_exec(execfd, exec_path, target_argv, target_environ, regs, |
fd4d81dd AP |
838 | info, &bprm); |
839 | if (ret != 0) { | |
9d3019bc | 840 | printf("Error while loading %s: %s\n", exec_path, strerror(-ret)); |
4d1275c2 | 841 | _exit(EXIT_FAILURE); |
b12b6a18 TS |
842 | } |
843 | ||
844 | for (wrk = target_environ; *wrk; wrk++) { | |
ec45bbe5 | 845 | g_free(*wrk); |
31e31b8a | 846 | } |
3b46e624 | 847 | |
ec45bbe5 | 848 | g_free(target_environ); |
b12b6a18 | 849 | |
13829020 | 850 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { |
5ca870b9 | 851 | qemu_log("guest_base %p\n", (void *)guest_base); |
10d0d505 | 852 | log_page_dump("binary load"); |
2e77eac6 BS |
853 | |
854 | qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); | |
855 | qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); | |
7c4ee5bc RH |
856 | qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code); |
857 | qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data); | |
2e77eac6 | 858 | qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); |
7c4ee5bc | 859 | qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack); |
2e77eac6 BS |
860 | qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); |
861 | qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
7c4ee5bc RH |
862 | qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start); |
863 | qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n", | |
864 | info->arg_end + (abi_ulong)sizeof(abi_ulong)); | |
865 | qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv); | |
2e77eac6 | 866 | } |
31e31b8a | 867 | |
53a5960a | 868 | target_set_brk(info->brk); |
31e31b8a | 869 | syscall_init(); |
66fb9763 | 870 | signal_init(); |
31e31b8a | 871 | |
9002ec79 RH |
872 | /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay |
873 | generating the prologue until now so that the prologue can take | |
874 | the real value of GUEST_BASE into account. */ | |
b1311c4a | 875 | tcg_prologue_init(tcg_ctx); |
e8feb96f | 876 | tcg_region_init(); |
9002ec79 | 877 | |
cd71c089 LV |
878 | target_cpu_copy_regs(env, regs); |
879 | ||
fcedd920 AB |
880 | if (gdbstub) { |
881 | if (gdbserver_start(gdbstub) < 0) { | |
882 | fprintf(stderr, "qemu: could not open gdbserver on %s\n", | |
883 | gdbstub); | |
4d1275c2 | 884 | exit(EXIT_FAILURE); |
ff7a981a | 885 | } |
db6b81d4 | 886 | gdb_handlesig(cpu, 0); |
1fddef4b | 887 | } |
1b6b029e FB |
888 | cpu_loop(env); |
889 | /* never exits */ | |
31e31b8a FB |
890 | return 0; |
891 | } |