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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 | */ |
d39594e9 | 19 | #include "qemu/osdep.h" |
b52713c1 | 20 | #include "qemu/units.h" |
67a1de0d | 21 | #include "qemu-version.h" |
edf8e2af | 22 | #include <sys/syscall.h> |
703e0e89 | 23 | #include <sys/resource.h> |
31e31b8a | 24 | |
daa76aa4 | 25 | #include "qapi/error.h" |
3ef693a0 | 26 | #include "qemu.h" |
f348b6d1 | 27 | #include "qemu/path.h" |
6533dd6e | 28 | #include "qemu/config-file.h" |
f348b6d1 VB |
29 | #include "qemu/cutils.h" |
30 | #include "qemu/help_option.h" | |
2b41f10e | 31 | #include "cpu.h" |
63c91552 | 32 | #include "exec/exec-all.h" |
9002ec79 | 33 | #include "tcg.h" |
1de7afc9 PB |
34 | #include "qemu/timer.h" |
35 | #include "qemu/envlist.h" | |
d8fd2954 | 36 | #include "elf.h" |
6533dd6e | 37 | #include "trace/control.h" |
542ca434 | 38 | #include "target_elf.h" |
cd71c089 | 39 | #include "cpu_loop-common.h" |
04a6dfeb | 40 | |
d088d664 AJ |
41 | char *exec_path; |
42 | ||
1b530a6d | 43 | int singlestep; |
8cb76755 SW |
44 | static const char *filename; |
45 | static const char *argv0; | |
46 | static int gdbstub_port; | |
47 | static envlist_t *envlist; | |
51fb256a | 48 | static const char *cpu_model; |
2278b939 | 49 | static const char *cpu_type; |
379f6698 PB |
50 | unsigned long mmap_min_addr; |
51 | unsigned long guest_base; | |
52 | int have_guest_base; | |
120a9848 | 53 | |
288e65b9 AG |
54 | /* |
55 | * When running 32-on-64 we should make sure we can fit all of the possible | |
56 | * guest address space into a contiguous chunk of virtual host memory. | |
57 | * | |
58 | * This way we will never overlap with our own libraries or binaries or stack | |
59 | * or anything else that QEMU maps. | |
18e80c55 RH |
60 | * |
61 | * Many cpus reserve the high bit (or more than one for some 64-bit cpus) | |
62 | * of the address for the kernel. Some cpus rely on this and user space | |
63 | * uses the high bit(s) for pointer tagging and the like. For them, we | |
64 | * must preserve the expected address space. | |
288e65b9 | 65 | */ |
18e80c55 RH |
66 | #ifndef MAX_RESERVED_VA |
67 | # if HOST_LONG_BITS > TARGET_VIRT_ADDR_SPACE_BITS | |
68 | # if TARGET_VIRT_ADDR_SPACE_BITS == 32 && \ | |
69 | (TARGET_LONG_BITS == 32 || defined(TARGET_ABI32)) | |
70 | /* There are a number of places where we assign reserved_va to a variable | |
71 | of type abi_ulong and expect it to fit. Avoid the last page. */ | |
72 | # define MAX_RESERVED_VA (0xfffffffful & TARGET_PAGE_MASK) | |
73 | # else | |
74 | # define MAX_RESERVED_VA (1ul << TARGET_VIRT_ADDR_SPACE_BITS) | |
75 | # endif | |
314992b1 | 76 | # else |
18e80c55 | 77 | # define MAX_RESERVED_VA 0 |
314992b1 | 78 | # endif |
18e80c55 RH |
79 | #endif |
80 | ||
68a1c816 | 81 | unsigned long reserved_va; |
1b530a6d | 82 | |
d03f9c32 | 83 | static void usage(int exitcode); |
fc9c5412 | 84 | |
7ee2822c | 85 | static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX; |
e586822a | 86 | const char *qemu_uname_release; |
586314f2 | 87 | |
9de5e440 FB |
88 | /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so |
89 | we allocate a bigger stack. Need a better solution, for example | |
90 | by remapping the process stack directly at the right place */ | |
703e0e89 | 91 | unsigned long guest_stack_size = 8 * 1024 * 1024UL; |
31e31b8a FB |
92 | |
93 | void gemu_log(const char *fmt, ...) | |
94 | { | |
95 | va_list ap; | |
96 | ||
97 | va_start(ap, fmt); | |
98 | vfprintf(stderr, fmt, ap); | |
99 | va_end(ap); | |
100 | } | |
101 | ||
8fcd3692 | 102 | #if defined(TARGET_I386) |
05390248 | 103 | int cpu_get_pic_interrupt(CPUX86State *env) |
92ccca6a FB |
104 | { |
105 | return -1; | |
106 | } | |
8fcd3692 | 107 | #endif |
92ccca6a | 108 | |
d5975363 PB |
109 | /***********************************************************/ |
110 | /* Helper routines for implementing atomic operations. */ | |
111 | ||
d5975363 PB |
112 | /* Make sure everything is in a consistent state for calling fork(). */ |
113 | void fork_start(void) | |
114 | { | |
06065c45 | 115 | start_exclusive(); |
d032d1b4 | 116 | mmap_fork_start(); |
024949ca | 117 | cpu_list_lock(); |
d5975363 PB |
118 | } |
119 | ||
120 | void fork_end(int child) | |
121 | { | |
d032d1b4 | 122 | mmap_fork_end(child); |
d5975363 | 123 | if (child) { |
bdc44640 | 124 | CPUState *cpu, *next_cpu; |
d5975363 PB |
125 | /* Child processes created by fork() only have a single thread. |
126 | Discard information about the parent threads. */ | |
bdc44640 AF |
127 | CPU_FOREACH_SAFE(cpu, next_cpu) { |
128 | if (cpu != thread_cpu) { | |
068a5ea0 | 129 | QTAILQ_REMOVE_RCU(&cpus, cpu, node); |
bdc44640 AF |
130 | } |
131 | } | |
267f685b | 132 | qemu_init_cpu_list(); |
f7ec7f7b | 133 | gdbserver_fork(thread_cpu); |
06065c45 PM |
134 | /* qemu_init_cpu_list() takes care of reinitializing the |
135 | * exclusive state, so we don't need to end_exclusive() here. | |
136 | */ | |
d5975363 | 137 | } else { |
267f685b | 138 | cpu_list_unlock(); |
06065c45 | 139 | end_exclusive(); |
d5975363 | 140 | } |
d5975363 PB |
141 | } |
142 | ||
b44316fb | 143 | __thread CPUState *thread_cpu; |
59faf6d6 | 144 | |
178f9429 SF |
145 | bool qemu_cpu_is_self(CPUState *cpu) |
146 | { | |
147 | return thread_cpu == cpu; | |
148 | } | |
149 | ||
150 | void qemu_cpu_kick(CPUState *cpu) | |
151 | { | |
152 | cpu_exit(cpu); | |
153 | } | |
154 | ||
edf8e2af MW |
155 | void task_settid(TaskState *ts) |
156 | { | |
157 | if (ts->ts_tid == 0) { | |
edf8e2af | 158 | ts->ts_tid = (pid_t)syscall(SYS_gettid); |
edf8e2af MW |
159 | } |
160 | } | |
161 | ||
162 | void stop_all_tasks(void) | |
163 | { | |
164 | /* | |
165 | * We trust that when using NPTL, start_exclusive() | |
166 | * handles thread stopping correctly. | |
167 | */ | |
168 | start_exclusive(); | |
169 | } | |
170 | ||
c3a92833 | 171 | /* Assumes contents are already zeroed. */ |
624f7979 PB |
172 | void init_task_state(TaskState *ts) |
173 | { | |
624f7979 | 174 | ts->used = 1; |
624f7979 | 175 | } |
fc9c5412 | 176 | |
30ba0ee5 AF |
177 | CPUArchState *cpu_copy(CPUArchState *env) |
178 | { | |
ff4700b0 | 179 | CPUState *cpu = ENV_GET_CPU(env); |
2278b939 | 180 | CPUState *new_cpu = cpu_create(cpu_type); |
61c7480f | 181 | CPUArchState *new_env = new_cpu->env_ptr; |
30ba0ee5 AF |
182 | CPUBreakpoint *bp; |
183 | CPUWatchpoint *wp; | |
30ba0ee5 AF |
184 | |
185 | /* Reset non arch specific state */ | |
75a34036 | 186 | cpu_reset(new_cpu); |
30ba0ee5 AF |
187 | |
188 | memcpy(new_env, env, sizeof(CPUArchState)); | |
189 | ||
190 | /* Clone all break/watchpoints. | |
191 | Note: Once we support ptrace with hw-debug register access, make sure | |
192 | BP_CPU break/watchpoints are handled correctly on clone. */ | |
1d085f6c TB |
193 | QTAILQ_INIT(&new_cpu->breakpoints); |
194 | QTAILQ_INIT(&new_cpu->watchpoints); | |
f0c3c505 | 195 | QTAILQ_FOREACH(bp, &cpu->breakpoints, entry) { |
b3310ab3 | 196 | cpu_breakpoint_insert(new_cpu, bp->pc, bp->flags, NULL); |
30ba0ee5 | 197 | } |
ff4700b0 | 198 | QTAILQ_FOREACH(wp, &cpu->watchpoints, entry) { |
05068c0d | 199 | cpu_watchpoint_insert(new_cpu, wp->vaddr, wp->len, wp->flags, NULL); |
30ba0ee5 | 200 | } |
30ba0ee5 AF |
201 | |
202 | return new_env; | |
203 | } | |
204 | ||
fc9c5412 JS |
205 | static void handle_arg_help(const char *arg) |
206 | { | |
4d1275c2 | 207 | usage(EXIT_SUCCESS); |
fc9c5412 JS |
208 | } |
209 | ||
210 | static void handle_arg_log(const char *arg) | |
211 | { | |
212 | int mask; | |
fc9c5412 | 213 | |
4fde1eba | 214 | mask = qemu_str_to_log_mask(arg); |
fc9c5412 | 215 | if (!mask) { |
59a6fa6e | 216 | qemu_print_log_usage(stdout); |
4d1275c2 | 217 | exit(EXIT_FAILURE); |
fc9c5412 | 218 | } |
f2937a33 | 219 | qemu_log_needs_buffers(); |
24537a01 | 220 | qemu_set_log(mask); |
fc9c5412 JS |
221 | } |
222 | ||
8423fa90 AB |
223 | static void handle_arg_dfilter(const char *arg) |
224 | { | |
225 | qemu_set_dfilter_ranges(arg, NULL); | |
226 | } | |
227 | ||
50171d42 CWR |
228 | static void handle_arg_log_filename(const char *arg) |
229 | { | |
daa76aa4 | 230 | qemu_set_log_filename(arg, &error_fatal); |
50171d42 CWR |
231 | } |
232 | ||
fc9c5412 JS |
233 | static void handle_arg_set_env(const char *arg) |
234 | { | |
235 | char *r, *p, *token; | |
236 | r = p = strdup(arg); | |
237 | while ((token = strsep(&p, ",")) != NULL) { | |
238 | if (envlist_setenv(envlist, token) != 0) { | |
4d1275c2 | 239 | usage(EXIT_FAILURE); |
fc9c5412 JS |
240 | } |
241 | } | |
242 | free(r); | |
243 | } | |
244 | ||
245 | static void handle_arg_unset_env(const char *arg) | |
246 | { | |
247 | char *r, *p, *token; | |
248 | r = p = strdup(arg); | |
249 | while ((token = strsep(&p, ",")) != NULL) { | |
250 | if (envlist_unsetenv(envlist, token) != 0) { | |
4d1275c2 | 251 | usage(EXIT_FAILURE); |
fc9c5412 JS |
252 | } |
253 | } | |
254 | free(r); | |
255 | } | |
256 | ||
257 | static void handle_arg_argv0(const char *arg) | |
258 | { | |
259 | argv0 = strdup(arg); | |
260 | } | |
261 | ||
262 | static void handle_arg_stack_size(const char *arg) | |
263 | { | |
264 | char *p; | |
265 | guest_stack_size = strtoul(arg, &p, 0); | |
266 | if (guest_stack_size == 0) { | |
4d1275c2 | 267 | usage(EXIT_FAILURE); |
fc9c5412 JS |
268 | } |
269 | ||
270 | if (*p == 'M') { | |
b52713c1 | 271 | guest_stack_size *= MiB; |
fc9c5412 | 272 | } else if (*p == 'k' || *p == 'K') { |
b52713c1 | 273 | guest_stack_size *= KiB; |
fc9c5412 JS |
274 | } |
275 | } | |
276 | ||
277 | static void handle_arg_ld_prefix(const char *arg) | |
278 | { | |
279 | interp_prefix = strdup(arg); | |
280 | } | |
281 | ||
282 | static void handle_arg_pagesize(const char *arg) | |
283 | { | |
284 | qemu_host_page_size = atoi(arg); | |
285 | if (qemu_host_page_size == 0 || | |
286 | (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) { | |
287 | fprintf(stderr, "page size must be a power of two\n"); | |
4d1275c2 | 288 | exit(EXIT_FAILURE); |
fc9c5412 JS |
289 | } |
290 | } | |
291 | ||
c5e4a5a9 MR |
292 | static void handle_arg_randseed(const char *arg) |
293 | { | |
294 | unsigned long long seed; | |
295 | ||
296 | if (parse_uint_full(arg, &seed, 0) != 0 || seed > UINT_MAX) { | |
297 | fprintf(stderr, "Invalid seed number: %s\n", arg); | |
4d1275c2 | 298 | exit(EXIT_FAILURE); |
c5e4a5a9 MR |
299 | } |
300 | srand(seed); | |
301 | } | |
302 | ||
fc9c5412 JS |
303 | static void handle_arg_gdb(const char *arg) |
304 | { | |
305 | gdbstub_port = atoi(arg); | |
306 | } | |
307 | ||
308 | static void handle_arg_uname(const char *arg) | |
309 | { | |
310 | qemu_uname_release = strdup(arg); | |
311 | } | |
312 | ||
313 | static void handle_arg_cpu(const char *arg) | |
314 | { | |
315 | cpu_model = strdup(arg); | |
c8057f95 | 316 | if (cpu_model == NULL || is_help_option(cpu_model)) { |
fc9c5412 | 317 | /* XXX: implement xxx_cpu_list for targets that still miss it */ |
e916cbf8 PM |
318 | #if defined(cpu_list) |
319 | cpu_list(stdout, &fprintf); | |
fc9c5412 | 320 | #endif |
4d1275c2 | 321 | exit(EXIT_FAILURE); |
fc9c5412 JS |
322 | } |
323 | } | |
324 | ||
fc9c5412 JS |
325 | static void handle_arg_guest_base(const char *arg) |
326 | { | |
327 | guest_base = strtol(arg, NULL, 0); | |
328 | have_guest_base = 1; | |
329 | } | |
330 | ||
331 | static void handle_arg_reserved_va(const char *arg) | |
332 | { | |
333 | char *p; | |
334 | int shift = 0; | |
335 | reserved_va = strtoul(arg, &p, 0); | |
336 | switch (*p) { | |
337 | case 'k': | |
338 | case 'K': | |
339 | shift = 10; | |
340 | break; | |
341 | case 'M': | |
342 | shift = 20; | |
343 | break; | |
344 | case 'G': | |
345 | shift = 30; | |
346 | break; | |
347 | } | |
348 | if (shift) { | |
349 | unsigned long unshifted = reserved_va; | |
350 | p++; | |
351 | reserved_va <<= shift; | |
18e80c55 RH |
352 | if (reserved_va >> shift != unshifted |
353 | || (MAX_RESERVED_VA && reserved_va > MAX_RESERVED_VA)) { | |
fc9c5412 | 354 | fprintf(stderr, "Reserved virtual address too big\n"); |
4d1275c2 | 355 | exit(EXIT_FAILURE); |
fc9c5412 JS |
356 | } |
357 | } | |
358 | if (*p) { | |
359 | fprintf(stderr, "Unrecognised -R size suffix '%s'\n", p); | |
4d1275c2 | 360 | exit(EXIT_FAILURE); |
fc9c5412 JS |
361 | } |
362 | } | |
fc9c5412 JS |
363 | |
364 | static void handle_arg_singlestep(const char *arg) | |
365 | { | |
366 | singlestep = 1; | |
367 | } | |
368 | ||
369 | static void handle_arg_strace(const char *arg) | |
370 | { | |
371 | do_strace = 1; | |
372 | } | |
373 | ||
374 | static void handle_arg_version(const char *arg) | |
375 | { | |
7e563bfb | 376 | printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION |
0781dd6e | 377 | "\n" QEMU_COPYRIGHT "\n"); |
4d1275c2 | 378 | exit(EXIT_SUCCESS); |
fc9c5412 JS |
379 | } |
380 | ||
6533dd6e LV |
381 | static char *trace_file; |
382 | static void handle_arg_trace(const char *arg) | |
383 | { | |
384 | g_free(trace_file); | |
385 | trace_file = trace_opt_parse(arg); | |
386 | } | |
387 | ||
fc9c5412 JS |
388 | struct qemu_argument { |
389 | const char *argv; | |
390 | const char *env; | |
391 | bool has_arg; | |
392 | void (*handle_opt)(const char *arg); | |
393 | const char *example; | |
394 | const char *help; | |
395 | }; | |
396 | ||
42644cee | 397 | static const struct qemu_argument arg_table[] = { |
fc9c5412 JS |
398 | {"h", "", false, handle_arg_help, |
399 | "", "print this help"}, | |
daaf8c8e MI |
400 | {"help", "", false, handle_arg_help, |
401 | "", ""}, | |
fc9c5412 JS |
402 | {"g", "QEMU_GDB", true, handle_arg_gdb, |
403 | "port", "wait gdb connection to 'port'"}, | |
404 | {"L", "QEMU_LD_PREFIX", true, handle_arg_ld_prefix, | |
405 | "path", "set the elf interpreter prefix to 'path'"}, | |
406 | {"s", "QEMU_STACK_SIZE", true, handle_arg_stack_size, | |
407 | "size", "set the stack size to 'size' bytes"}, | |
408 | {"cpu", "QEMU_CPU", true, handle_arg_cpu, | |
c8057f95 | 409 | "model", "select CPU (-cpu help for list)"}, |
fc9c5412 JS |
410 | {"E", "QEMU_SET_ENV", true, handle_arg_set_env, |
411 | "var=value", "sets targets environment variable (see below)"}, | |
412 | {"U", "QEMU_UNSET_ENV", true, handle_arg_unset_env, | |
413 | "var", "unsets targets environment variable (see below)"}, | |
414 | {"0", "QEMU_ARGV0", true, handle_arg_argv0, | |
415 | "argv0", "forces target process argv[0] to be 'argv0'"}, | |
416 | {"r", "QEMU_UNAME", true, handle_arg_uname, | |
417 | "uname", "set qemu uname release string to 'uname'"}, | |
fc9c5412 JS |
418 | {"B", "QEMU_GUEST_BASE", true, handle_arg_guest_base, |
419 | "address", "set guest_base address to 'address'"}, | |
420 | {"R", "QEMU_RESERVED_VA", true, handle_arg_reserved_va, | |
421 | "size", "reserve 'size' bytes for guest virtual address space"}, | |
fc9c5412 | 422 | {"d", "QEMU_LOG", true, handle_arg_log, |
989b697d PM |
423 | "item[,...]", "enable logging of specified items " |
424 | "(use '-d help' for a list of items)"}, | |
8423fa90 AB |
425 | {"dfilter", "QEMU_DFILTER", true, handle_arg_dfilter, |
426 | "range[,...]","filter logging based on address range"}, | |
50171d42 | 427 | {"D", "QEMU_LOG_FILENAME", true, handle_arg_log_filename, |
989b697d | 428 | "logfile", "write logs to 'logfile' (default stderr)"}, |
fc9c5412 JS |
429 | {"p", "QEMU_PAGESIZE", true, handle_arg_pagesize, |
430 | "pagesize", "set the host page size to 'pagesize'"}, | |
431 | {"singlestep", "QEMU_SINGLESTEP", false, handle_arg_singlestep, | |
432 | "", "run in singlestep mode"}, | |
433 | {"strace", "QEMU_STRACE", false, handle_arg_strace, | |
434 | "", "log system calls"}, | |
c5e4a5a9 MR |
435 | {"seed", "QEMU_RAND_SEED", true, handle_arg_randseed, |
436 | "", "Seed for pseudo-random number generator"}, | |
6533dd6e LV |
437 | {"trace", "QEMU_TRACE", true, handle_arg_trace, |
438 | "", "[[enable=]<pattern>][,events=<file>][,file=<file>]"}, | |
fc9c5412 | 439 | {"version", "QEMU_VERSION", false, handle_arg_version, |
1386d4c0 | 440 | "", "display version information and exit"}, |
fc9c5412 JS |
441 | {NULL, NULL, false, NULL, NULL, NULL} |
442 | }; | |
443 | ||
d03f9c32 | 444 | static void usage(int exitcode) |
fc9c5412 | 445 | { |
42644cee | 446 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
447 | int maxarglen; |
448 | int maxenvlen; | |
449 | ||
2e59915d PB |
450 | printf("usage: qemu-" TARGET_NAME " [options] program [arguments...]\n" |
451 | "Linux CPU emulator (compiled for " TARGET_NAME " emulation)\n" | |
fc9c5412 JS |
452 | "\n" |
453 | "Options and associated environment variables:\n" | |
454 | "\n"); | |
455 | ||
63ec54d7 PM |
456 | /* Calculate column widths. We must always have at least enough space |
457 | * for the column header. | |
458 | */ | |
459 | maxarglen = strlen("Argument"); | |
460 | maxenvlen = strlen("Env-variable"); | |
fc9c5412 JS |
461 | |
462 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
63ec54d7 PM |
463 | int arglen = strlen(arginfo->argv); |
464 | if (arginfo->has_arg) { | |
465 | arglen += strlen(arginfo->example) + 1; | |
466 | } | |
fc9c5412 JS |
467 | if (strlen(arginfo->env) > maxenvlen) { |
468 | maxenvlen = strlen(arginfo->env); | |
469 | } | |
63ec54d7 PM |
470 | if (arglen > maxarglen) { |
471 | maxarglen = arglen; | |
fc9c5412 JS |
472 | } |
473 | } | |
474 | ||
63ec54d7 PM |
475 | printf("%-*s %-*s Description\n", maxarglen+1, "Argument", |
476 | maxenvlen, "Env-variable"); | |
fc9c5412 JS |
477 | |
478 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
479 | if (arginfo->has_arg) { | |
480 | printf("-%s %-*s %-*s %s\n", arginfo->argv, | |
63ec54d7 PM |
481 | (int)(maxarglen - strlen(arginfo->argv) - 1), |
482 | arginfo->example, maxenvlen, arginfo->env, arginfo->help); | |
fc9c5412 | 483 | } else { |
63ec54d7 | 484 | printf("-%-*s %-*s %s\n", maxarglen, arginfo->argv, |
fc9c5412 JS |
485 | maxenvlen, arginfo->env, |
486 | arginfo->help); | |
487 | } | |
488 | } | |
489 | ||
490 | printf("\n" | |
491 | "Defaults:\n" | |
492 | "QEMU_LD_PREFIX = %s\n" | |
989b697d | 493 | "QEMU_STACK_SIZE = %ld byte\n", |
fc9c5412 | 494 | interp_prefix, |
989b697d | 495 | guest_stack_size); |
fc9c5412 JS |
496 | |
497 | printf("\n" | |
498 | "You can use -E and -U options or the QEMU_SET_ENV and\n" | |
499 | "QEMU_UNSET_ENV environment variables to set and unset\n" | |
500 | "environment variables for the target process.\n" | |
501 | "It is possible to provide several variables by separating them\n" | |
502 | "by commas in getsubopt(3) style. Additionally it is possible to\n" | |
503 | "provide the -E and -U options multiple times.\n" | |
504 | "The following lines are equivalent:\n" | |
505 | " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n" | |
506 | " -E var1=val2,var2=val2 -U LD_PRELOAD,LD_DEBUG\n" | |
507 | " QEMU_SET_ENV=var1=val2,var2=val2 QEMU_UNSET_ENV=LD_PRELOAD,LD_DEBUG\n" | |
508 | "Note that if you provide several changes to a single variable\n" | |
f5048cb7 EB |
509 | "the last change will stay in effect.\n" |
510 | "\n" | |
511 | QEMU_HELP_BOTTOM "\n"); | |
fc9c5412 | 512 | |
d03f9c32 | 513 | exit(exitcode); |
fc9c5412 JS |
514 | } |
515 | ||
516 | static int parse_args(int argc, char **argv) | |
517 | { | |
518 | const char *r; | |
519 | int optind; | |
42644cee | 520 | const struct qemu_argument *arginfo; |
fc9c5412 JS |
521 | |
522 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
523 | if (arginfo->env == NULL) { | |
524 | continue; | |
525 | } | |
526 | ||
527 | r = getenv(arginfo->env); | |
528 | if (r != NULL) { | |
529 | arginfo->handle_opt(r); | |
530 | } | |
531 | } | |
532 | ||
533 | optind = 1; | |
534 | for (;;) { | |
535 | if (optind >= argc) { | |
536 | break; | |
537 | } | |
538 | r = argv[optind]; | |
539 | if (r[0] != '-') { | |
540 | break; | |
541 | } | |
542 | optind++; | |
543 | r++; | |
544 | if (!strcmp(r, "-")) { | |
545 | break; | |
546 | } | |
ba02577c MI |
547 | /* Treat --foo the same as -foo. */ |
548 | if (r[0] == '-') { | |
549 | r++; | |
550 | } | |
fc9c5412 JS |
551 | |
552 | for (arginfo = arg_table; arginfo->handle_opt != NULL; arginfo++) { | |
553 | if (!strcmp(r, arginfo->argv)) { | |
fc9c5412 | 554 | if (arginfo->has_arg) { |
1386d4c0 | 555 | if (optind >= argc) { |
138940bf MI |
556 | (void) fprintf(stderr, |
557 | "qemu: missing argument for option '%s'\n", r); | |
4d1275c2 | 558 | exit(EXIT_FAILURE); |
1386d4c0 PM |
559 | } |
560 | arginfo->handle_opt(argv[optind]); | |
fc9c5412 | 561 | optind++; |
1386d4c0 PM |
562 | } else { |
563 | arginfo->handle_opt(NULL); | |
fc9c5412 | 564 | } |
fc9c5412 JS |
565 | break; |
566 | } | |
567 | } | |
568 | ||
569 | /* no option matched the current argv */ | |
570 | if (arginfo->handle_opt == NULL) { | |
138940bf | 571 | (void) fprintf(stderr, "qemu: unknown option '%s'\n", r); |
4d1275c2 | 572 | exit(EXIT_FAILURE); |
fc9c5412 JS |
573 | } |
574 | } | |
575 | ||
576 | if (optind >= argc) { | |
138940bf | 577 | (void) fprintf(stderr, "qemu: no user program specified\n"); |
4d1275c2 | 578 | exit(EXIT_FAILURE); |
fc9c5412 JS |
579 | } |
580 | ||
581 | filename = argv[optind]; | |
582 | exec_path = argv[optind]; | |
583 | ||
584 | return optind; | |
585 | } | |
586 | ||
902b3d5c | 587 | int main(int argc, char **argv, char **envp) |
31e31b8a | 588 | { |
01ffc75b | 589 | struct target_pt_regs regs1, *regs = ®s1; |
31e31b8a | 590 | struct image_info info1, *info = &info1; |
edf8e2af | 591 | struct linux_binprm bprm; |
48e15fc2 | 592 | TaskState *ts; |
9349b4f9 | 593 | CPUArchState *env; |
db6b81d4 | 594 | CPUState *cpu; |
586314f2 | 595 | int optind; |
04a6dfeb | 596 | char **target_environ, **wrk; |
7d8cec95 AJ |
597 | char **target_argv; |
598 | int target_argc; | |
7d8cec95 | 599 | int i; |
fd4d81dd | 600 | int ret; |
03cfd8fa | 601 | int execfd; |
b12b6a18 | 602 | |
fe4db84d | 603 | module_call_init(MODULE_INIT_TRACE); |
267f685b | 604 | qemu_init_cpu_list(); |
ce008c1f AF |
605 | module_call_init(MODULE_INIT_QOM); |
606 | ||
ec45bbe5 | 607 | envlist = envlist_create(); |
04a6dfeb AJ |
608 | |
609 | /* add current environment into the list */ | |
610 | for (wrk = environ; *wrk != NULL; wrk++) { | |
611 | (void) envlist_setenv(envlist, *wrk); | |
612 | } | |
613 | ||
703e0e89 RH |
614 | /* Read the stack limit from the kernel. If it's "unlimited", |
615 | then we can do little else besides use the default. */ | |
616 | { | |
617 | struct rlimit lim; | |
618 | if (getrlimit(RLIMIT_STACK, &lim) == 0 | |
81bbe906 TY |
619 | && lim.rlim_cur != RLIM_INFINITY |
620 | && lim.rlim_cur == (target_long)lim.rlim_cur) { | |
703e0e89 RH |
621 | guest_stack_size = lim.rlim_cur; |
622 | } | |
623 | } | |
624 | ||
b1f9be31 | 625 | cpu_model = NULL; |
b5ec5ce0 | 626 | |
c5e4a5a9 MR |
627 | srand(time(NULL)); |
628 | ||
6533dd6e LV |
629 | qemu_add_opts(&qemu_trace_opts); |
630 | ||
fc9c5412 | 631 | optind = parse_args(argc, argv); |
586314f2 | 632 | |
6533dd6e LV |
633 | if (!trace_init_backends()) { |
634 | exit(1); | |
635 | } | |
636 | trace_init_file(trace_file); | |
637 | ||
31e31b8a | 638 | /* Zero out regs */ |
01ffc75b | 639 | memset(regs, 0, sizeof(struct target_pt_regs)); |
31e31b8a FB |
640 | |
641 | /* Zero out image_info */ | |
642 | memset(info, 0, sizeof(struct image_info)); | |
643 | ||
edf8e2af MW |
644 | memset(&bprm, 0, sizeof (bprm)); |
645 | ||
74cd30b8 FB |
646 | /* Scan interp_prefix dir for replacement files. */ |
647 | init_paths(interp_prefix); | |
648 | ||
4a24a758 PM |
649 | init_qemu_uname_release(); |
650 | ||
768fe76e YS |
651 | execfd = qemu_getauxval(AT_EXECFD); |
652 | if (execfd == 0) { | |
653 | execfd = open(filename, O_RDONLY); | |
654 | if (execfd < 0) { | |
655 | printf("Error while loading %s: %s\n", filename, strerror(errno)); | |
656 | _exit(EXIT_FAILURE); | |
657 | } | |
658 | } | |
659 | ||
46027c07 | 660 | if (cpu_model == NULL) { |
768fe76e | 661 | cpu_model = cpu_get_model(get_elf_eflags(execfd)); |
aaed909a | 662 | } |
2278b939 IM |
663 | cpu_type = parse_cpu_model(cpu_model); |
664 | ||
2b5249b8 | 665 | /* init tcg before creating CPUs and to get qemu_host_page_size */ |
d5ab9713 | 666 | tcg_exec_init(0); |
2278b939 | 667 | |
dc18baae LV |
668 | /* Reserving *too* much vm space via mmap can run into problems |
669 | with rlimits, oom due to page table creation, etc. We will still try it, | |
670 | if directed by the command-line option, but not by default. */ | |
671 | if (HOST_LONG_BITS == 64 && | |
672 | TARGET_VIRT_ADDR_SPACE_BITS <= 32 && | |
673 | reserved_va == 0) { | |
674 | /* reserved_va must be aligned with the host page size | |
675 | * as it is used with mmap() | |
676 | */ | |
677 | reserved_va = MAX_RESERVED_VA & qemu_host_page_mask; | |
678 | } | |
679 | ||
2278b939 | 680 | cpu = cpu_create(cpu_type); |
2994fd96 | 681 | env = cpu->env_ptr; |
0ac46af3 | 682 | cpu_reset(cpu); |
b55a37c9 | 683 | |
db6b81d4 | 684 | thread_cpu = cpu; |
3b46e624 | 685 | |
b6741956 FB |
686 | if (getenv("QEMU_STRACE")) { |
687 | do_strace = 1; | |
b92c47c1 TS |
688 | } |
689 | ||
c5e4a5a9 MR |
690 | if (getenv("QEMU_RAND_SEED")) { |
691 | handle_arg_randseed(getenv("QEMU_RAND_SEED")); | |
692 | } | |
693 | ||
04a6dfeb AJ |
694 | target_environ = envlist_to_environ(envlist, NULL); |
695 | envlist_free(envlist); | |
b12b6a18 | 696 | |
379f6698 | 697 | /* |
2b5249b8 | 698 | * Now that page sizes are configured in tcg_exec_init() we can do |
379f6698 PB |
699 | * proper page alignment for guest_base. |
700 | */ | |
701 | guest_base = HOST_PAGE_ALIGN(guest_base); | |
68a1c816 | 702 | |
806d1021 MI |
703 | if (reserved_va || have_guest_base) { |
704 | guest_base = init_guest_space(guest_base, reserved_va, 0, | |
705 | have_guest_base); | |
706 | if (guest_base == (unsigned long)-1) { | |
097b8cb8 PM |
707 | fprintf(stderr, "Unable to reserve 0x%lx bytes of virtual address " |
708 | "space for use as guest address space (check your virtual " | |
709 | "memory ulimit setting or reserve less using -R option)\n", | |
710 | reserved_va); | |
4d1275c2 | 711 | exit(EXIT_FAILURE); |
68a1c816 | 712 | } |
97cc7560 | 713 | |
806d1021 MI |
714 | if (reserved_va) { |
715 | mmap_next_start = reserved_va; | |
97cc7560 DDAG |
716 | } |
717 | } | |
379f6698 PB |
718 | |
719 | /* | |
720 | * Read in mmap_min_addr kernel parameter. This value is used | |
721 | * When loading the ELF image to determine whether guest_base | |
14f24e14 | 722 | * is needed. It is also used in mmap_find_vma. |
379f6698 | 723 | */ |
14f24e14 | 724 | { |
379f6698 PB |
725 | FILE *fp; |
726 | ||
727 | if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) { | |
728 | unsigned long tmp; | |
729 | if (fscanf(fp, "%lu", &tmp) == 1) { | |
730 | mmap_min_addr = tmp; | |
13829020 | 731 | qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr); |
379f6698 PB |
732 | } |
733 | fclose(fp); | |
734 | } | |
735 | } | |
379f6698 | 736 | |
7d8cec95 AJ |
737 | /* |
738 | * Prepare copy of argv vector for target. | |
739 | */ | |
740 | target_argc = argc - optind; | |
741 | target_argv = calloc(target_argc + 1, sizeof (char *)); | |
742 | if (target_argv == NULL) { | |
7d37435b PB |
743 | (void) fprintf(stderr, "Unable to allocate memory for target_argv\n"); |
744 | exit(EXIT_FAILURE); | |
7d8cec95 AJ |
745 | } |
746 | ||
747 | /* | |
748 | * If argv0 is specified (using '-0' switch) we replace | |
749 | * argv[0] pointer with the given one. | |
750 | */ | |
751 | i = 0; | |
752 | if (argv0 != NULL) { | |
753 | target_argv[i++] = strdup(argv0); | |
754 | } | |
755 | for (; i < target_argc; i++) { | |
756 | target_argv[i] = strdup(argv[optind + i]); | |
757 | } | |
758 | target_argv[target_argc] = NULL; | |
759 | ||
c78d65e8 | 760 | ts = g_new0(TaskState, 1); |
edf8e2af MW |
761 | init_task_state(ts); |
762 | /* build Task State */ | |
763 | ts->info = info; | |
764 | ts->bprm = &bprm; | |
0429a971 | 765 | cpu->opaque = ts; |
edf8e2af MW |
766 | task_settid(ts); |
767 | ||
03cfd8fa | 768 | ret = loader_exec(execfd, filename, target_argv, target_environ, regs, |
fd4d81dd AP |
769 | info, &bprm); |
770 | if (ret != 0) { | |
885c1d10 | 771 | printf("Error while loading %s: %s\n", filename, strerror(-ret)); |
4d1275c2 | 772 | _exit(EXIT_FAILURE); |
b12b6a18 TS |
773 | } |
774 | ||
775 | for (wrk = target_environ; *wrk; wrk++) { | |
ec45bbe5 | 776 | g_free(*wrk); |
31e31b8a | 777 | } |
3b46e624 | 778 | |
ec45bbe5 | 779 | g_free(target_environ); |
b12b6a18 | 780 | |
13829020 | 781 | if (qemu_loglevel_mask(CPU_LOG_PAGE)) { |
379f6698 | 782 | qemu_log("guest_base 0x%lx\n", guest_base); |
2e77eac6 BS |
783 | log_page_dump(); |
784 | ||
785 | qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk); | |
786 | qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code); | |
7c4ee5bc RH |
787 | qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n", info->start_code); |
788 | qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n", info->start_data); | |
2e77eac6 | 789 | qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data); |
7c4ee5bc | 790 | qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n", info->start_stack); |
2e77eac6 BS |
791 | qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk); |
792 | qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry); | |
7c4ee5bc RH |
793 | qemu_log("argv_start 0x" TARGET_ABI_FMT_lx "\n", info->arg_start); |
794 | qemu_log("env_start 0x" TARGET_ABI_FMT_lx "\n", | |
795 | info->arg_end + (abi_ulong)sizeof(abi_ulong)); | |
796 | qemu_log("auxv_start 0x" TARGET_ABI_FMT_lx "\n", info->saved_auxv); | |
2e77eac6 | 797 | } |
31e31b8a | 798 | |
53a5960a | 799 | target_set_brk(info->brk); |
31e31b8a | 800 | syscall_init(); |
66fb9763 | 801 | signal_init(); |
31e31b8a | 802 | |
9002ec79 RH |
803 | /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay |
804 | generating the prologue until now so that the prologue can take | |
805 | the real value of GUEST_BASE into account. */ | |
b1311c4a | 806 | tcg_prologue_init(tcg_ctx); |
e8feb96f | 807 | tcg_region_init(); |
9002ec79 | 808 | |
cd71c089 LV |
809 | target_cpu_copy_regs(env, regs); |
810 | ||
74c33bed | 811 | if (gdbstub_port) { |
ff7a981a PM |
812 | if (gdbserver_start(gdbstub_port) < 0) { |
813 | fprintf(stderr, "qemu: could not open gdbserver on port %d\n", | |
814 | gdbstub_port); | |
4d1275c2 | 815 | exit(EXIT_FAILURE); |
ff7a981a | 816 | } |
db6b81d4 | 817 | gdb_handlesig(cpu, 0); |
1fddef4b | 818 | } |
1b6b029e FB |
819 | cpu_loop(env); |
820 | /* never exits */ | |
31e31b8a FB |
821 | return 0; |
822 | } |