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libuser is a generated directory
[qemu/aliguori-queue.git] / bsd-user / main.c
blob1bba2b5055b6dee3b32421c90117979a2adc1959
1 /*
2 * qemu user main
3 *
4 * Copyright (c) 2003-2008 Fabrice Bellard
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, see <http://www.gnu.org/licenses/>.
18 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <stdarg.h>
22 #include <string.h>
23 #include <errno.h>
24 #include <unistd.h>
25 #include <machine/trap.h>
26 #include <sys/types.h>
27 #include <sys/mman.h>
28
29 #include "qemu.h"
30 #include "qemu-common.h"
31 /* For tb_lock */
32 #include "exec-all.h"
33
34
35 #include "envlist.h"
36
37 #define DEBUG_LOGFILE "/tmp/qemu.log"
38
39 int singlestep;
40 #if defined(CONFIG_USE_GUEST_BASE)
41 unsigned long mmap_min_addr;
42 unsigned long guest_base;
43 int have_guest_base;
44 #endif
45
46 static const char *interp_prefix = CONFIG_QEMU_PREFIX;
47 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
48 extern char **environ;
49
50 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
51 we allocate a bigger stack. Need a better solution, for example
52 by remapping the process stack directly at the right place */
53 unsigned long x86_stack_size = 512 * 1024;
54
55 void gemu_log(const char *fmt, ...)
56 {
57 va_list ap;
58
59 va_start(ap, fmt);
60 vfprintf(stderr, fmt, ap);
61 va_end(ap);
62 }
63
64 #if defined(TARGET_I386)
65 int cpu_get_pic_interrupt(CPUState *env)
66 {
67 return -1;
68 }
69 #endif
70
71 /* These are no-ops because we are not threadsafe. */
72 static inline void cpu_exec_start(CPUState *env)
73 {
74 }
75
76 static inline void cpu_exec_end(CPUState *env)
77 {
78 }
79
80 static inline void start_exclusive(void)
81 {
82 }
83
84 static inline void end_exclusive(void)
85 {
86 }
87
88 void fork_start(void)
89 {
90 }
91
92 void fork_end(int child)
93 {
94 if (child) {
95 gdbserver_fork(thread_env);
96 }
97 }
98
99 void cpu_list_lock(void)
100 {
101 }
102
103 void cpu_list_unlock(void)
104 {
105 }
106
107 #ifdef TARGET_I386
108 /***********************************************************/
109 /* CPUX86 core interface */
110
111 void cpu_smm_update(CPUState *env)
112 {
113 }
114
115 uint64_t cpu_get_tsc(CPUX86State *env)
116 {
117 return cpu_get_real_ticks();
118 }
119
120 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
121 int flags)
122 {
123 unsigned int e1, e2;
124 uint32_t *p;
125 e1 = (addr << 16) | (limit & 0xffff);
126 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
127 e2 |= flags;
128 p = ptr;
129 p[0] = tswap32(e1);
130 p[1] = tswap32(e2);
131 }
132
133 static uint64_t *idt_table;
134 #ifdef TARGET_X86_64
135 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
136 uint64_t addr, unsigned int sel)
137 {
138 uint32_t *p, e1, e2;
139 e1 = (addr & 0xffff) | (sel << 16);
140 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
141 p = ptr;
142 p[0] = tswap32(e1);
143 p[1] = tswap32(e2);
144 p[2] = tswap32(addr >> 32);
145 p[3] = 0;
146 }
147 /* only dpl matters as we do only user space emulation */
148 static void set_idt(int n, unsigned int dpl)
149 {
150 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
151 }
152 #else
153 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
154 uint32_t addr, unsigned int sel)
155 {
156 uint32_t *p, e1, e2;
157 e1 = (addr & 0xffff) | (sel << 16);
158 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
159 p = ptr;
160 p[0] = tswap32(e1);
161 p[1] = tswap32(e2);
162 }
163
164 /* only dpl matters as we do only user space emulation */
165 static void set_idt(int n, unsigned int dpl)
166 {
167 set_gate(idt_table + n, 0, dpl, 0, 0);
168 }
169 #endif
170
171 void cpu_loop(CPUX86State *env, enum BSDType bsd_type)
172 {
173 int trapnr;
174 abi_ulong pc;
175 //target_siginfo_t info;
176
177 for(;;) {
178 trapnr = cpu_x86_exec(env);
179 switch(trapnr) {
180 case 0x80:
181 /* syscall from int $0x80 */
182 env->regs[R_EAX] = do_openbsd_syscall(env,
183 env->regs[R_EAX],
184 env->regs[R_EBX],
185 env->regs[R_ECX],
186 env->regs[R_EDX],
187 env->regs[R_ESI],
188 env->regs[R_EDI],
189 env->regs[R_EBP]);
190 break;
191 #ifndef TARGET_ABI32
192 case EXCP_SYSCALL:
193 /* linux syscall from syscall intruction */
194 env->regs[R_EAX] = do_openbsd_syscall(env,
195 env->regs[R_EAX],
196 env->regs[R_EDI],
197 env->regs[R_ESI],
198 env->regs[R_EDX],
199 env->regs[10],
200 env->regs[8],
201 env->regs[9]);
202 env->eip = env->exception_next_eip;
203 break;
204 #endif
205 #if 0
206 case EXCP0B_NOSEG:
207 case EXCP0C_STACK:
208 info.si_signo = SIGBUS;
209 info.si_errno = 0;
210 info.si_code = TARGET_SI_KERNEL;
211 info._sifields._sigfault._addr = 0;
212 queue_signal(env, info.si_signo, &info);
213 break;
214 case EXCP0D_GPF:
215 /* XXX: potential problem if ABI32 */
216 #ifndef TARGET_X86_64
217 if (env->eflags & VM_MASK) {
218 handle_vm86_fault(env);
219 } else
220 #endif
221 {
222 info.si_signo = SIGSEGV;
223 info.si_errno = 0;
224 info.si_code = TARGET_SI_KERNEL;
225 info._sifields._sigfault._addr = 0;
226 queue_signal(env, info.si_signo, &info);
227 }
228 break;
229 case EXCP0E_PAGE:
230 info.si_signo = SIGSEGV;
231 info.si_errno = 0;
232 if (!(env->error_code & 1))
233 info.si_code = TARGET_SEGV_MAPERR;
234 else
235 info.si_code = TARGET_SEGV_ACCERR;
236 info._sifields._sigfault._addr = env->cr[2];
237 queue_signal(env, info.si_signo, &info);
238 break;
239 case EXCP00_DIVZ:
240 #ifndef TARGET_X86_64
241 if (env->eflags & VM_MASK) {
242 handle_vm86_trap(env, trapnr);
243 } else
244 #endif
245 {
246 /* division by zero */
247 info.si_signo = SIGFPE;
248 info.si_errno = 0;
249 info.si_code = TARGET_FPE_INTDIV;
250 info._sifields._sigfault._addr = env->eip;
251 queue_signal(env, info.si_signo, &info);
252 }
253 break;
254 case EXCP01_DB:
255 case EXCP03_INT3:
256 #ifndef TARGET_X86_64
257 if (env->eflags & VM_MASK) {
258 handle_vm86_trap(env, trapnr);
259 } else
260 #endif
261 {
262 info.si_signo = SIGTRAP;
263 info.si_errno = 0;
264 if (trapnr == EXCP01_DB) {
265 info.si_code = TARGET_TRAP_BRKPT;
266 info._sifields._sigfault._addr = env->eip;
267 } else {
268 info.si_code = TARGET_SI_KERNEL;
269 info._sifields._sigfault._addr = 0;
270 }
271 queue_signal(env, info.si_signo, &info);
272 }
273 break;
274 case EXCP04_INTO:
275 case EXCP05_BOUND:
276 #ifndef TARGET_X86_64
277 if (env->eflags & VM_MASK) {
278 handle_vm86_trap(env, trapnr);
279 } else
280 #endif
281 {
282 info.si_signo = SIGSEGV;
283 info.si_errno = 0;
284 info.si_code = TARGET_SI_KERNEL;
285 info._sifields._sigfault._addr = 0;
286 queue_signal(env, info.si_signo, &info);
287 }
288 break;
289 case EXCP06_ILLOP:
290 info.si_signo = SIGILL;
291 info.si_errno = 0;
292 info.si_code = TARGET_ILL_ILLOPN;
293 info._sifields._sigfault._addr = env->eip;
294 queue_signal(env, info.si_signo, &info);
295 break;
296 #endif
297 case EXCP_INTERRUPT:
298 /* just indicate that signals should be handled asap */
299 break;
300 #if 0
301 case EXCP_DEBUG:
302 {
303 int sig;
304
305 sig = gdb_handlesig (env, TARGET_SIGTRAP);
306 if (sig)
307 {
308 info.si_signo = sig;
309 info.si_errno = 0;
310 info.si_code = TARGET_TRAP_BRKPT;
311 queue_signal(env, info.si_signo, &info);
312 }
313 }
314 break;
315 #endif
316 default:
317 pc = env->segs[R_CS].base + env->eip;
318 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
319 (long)pc, trapnr);
320 abort();
321 }
322 process_pending_signals(env);
323 }
324 }
325 #endif
326
327 #ifdef TARGET_SPARC
328 #define SPARC64_STACK_BIAS 2047
329
330 //#define DEBUG_WIN
331 /* WARNING: dealing with register windows _is_ complicated. More info
332 can be found at http://www.sics.se/~psm/sparcstack.html */
333 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
334 {
335 index = (index + cwp * 16) % (16 * env->nwindows);
336 /* wrap handling : if cwp is on the last window, then we use the
337 registers 'after' the end */
338 if (index < 8 && env->cwp == env->nwindows - 1)
339 index += 16 * env->nwindows;
340 return index;
341 }
342
343 /* save the register window 'cwp1' */
344 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
345 {
346 unsigned int i;
347 abi_ulong sp_ptr;
348
349 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
350 #ifdef TARGET_SPARC64
351 if (sp_ptr & 3)
352 sp_ptr += SPARC64_STACK_BIAS;
353 #endif
354 #if defined(DEBUG_WIN)
355 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
356 sp_ptr, cwp1);
357 #endif
358 for(i = 0; i < 16; i++) {
359 /* FIXME - what to do if put_user() fails? */
360 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
361 sp_ptr += sizeof(abi_ulong);
362 }
363 }
364
365 static void save_window(CPUSPARCState *env)
366 {
367 #ifndef TARGET_SPARC64
368 unsigned int new_wim;
369 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
370 ((1LL << env->nwindows) - 1);
371 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
372 env->wim = new_wim;
373 #else
374 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
375 env->cansave++;
376 env->canrestore--;
377 #endif
378 }
379
380 static void restore_window(CPUSPARCState *env)
381 {
382 #ifndef TARGET_SPARC64
383 unsigned int new_wim;
384 #endif
385 unsigned int i, cwp1;
386 abi_ulong sp_ptr;
387
388 #ifndef TARGET_SPARC64
389 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
390 ((1LL << env->nwindows) - 1);
391 #endif
392
393 /* restore the invalid window */
394 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
395 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
396 #ifdef TARGET_SPARC64
397 if (sp_ptr & 3)
398 sp_ptr += SPARC64_STACK_BIAS;
399 #endif
400 #if defined(DEBUG_WIN)
401 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
402 sp_ptr, cwp1);
403 #endif
404 for(i = 0; i < 16; i++) {
405 /* FIXME - what to do if get_user() fails? */
406 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
407 sp_ptr += sizeof(abi_ulong);
408 }
409 #ifdef TARGET_SPARC64
410 env->canrestore++;
411 if (env->cleanwin < env->nwindows - 1)
412 env->cleanwin++;
413 env->cansave--;
414 #else
415 env->wim = new_wim;
416 #endif
417 }
418
419 static void flush_windows(CPUSPARCState *env)
420 {
421 int offset, cwp1;
422
423 offset = 1;
424 for(;;) {
425 /* if restore would invoke restore_window(), then we can stop */
426 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
427 #ifndef TARGET_SPARC64
428 if (env->wim & (1 << cwp1))
429 break;
430 #else
431 if (env->canrestore == 0)
432 break;
433 env->cansave++;
434 env->canrestore--;
435 #endif
436 save_window_offset(env, cwp1);
437 offset++;
438 }
439 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
440 #ifndef TARGET_SPARC64
441 /* set wim so that restore will reload the registers */
442 env->wim = 1 << cwp1;
443 #endif
444 #if defined(DEBUG_WIN)
445 printf("flush_windows: nb=%d\n", offset - 1);
446 #endif
447 }
448
449 void cpu_loop(CPUSPARCState *env, enum BSDType bsd_type)
450 {
451 int trapnr, ret, syscall_nr;
452 //target_siginfo_t info;
453
454 while (1) {
455 trapnr = cpu_sparc_exec (env);
456
457 switch (trapnr) {
458 #ifndef TARGET_SPARC64
459 case 0x80:
460 #else
461 case 0x100:
462 #endif
463 syscall_nr = env->gregs[1];
464 if (bsd_type == target_freebsd)
465 ret = do_freebsd_syscall(env, syscall_nr,
466 env->regwptr[0], env->regwptr[1],
467 env->regwptr[2], env->regwptr[3],
468 env->regwptr[4], env->regwptr[5]);
469 else if (bsd_type == target_netbsd)
470 ret = do_netbsd_syscall(env, syscall_nr,
471 env->regwptr[0], env->regwptr[1],
472 env->regwptr[2], env->regwptr[3],
473 env->regwptr[4], env->regwptr[5]);
474 else { //if (bsd_type == target_openbsd)
475 #if defined(TARGET_SPARC64)
476 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
477 TARGET_OPENBSD_SYSCALL_G2RFLAG);
478 #endif
479 ret = do_openbsd_syscall(env, syscall_nr,
480 env->regwptr[0], env->regwptr[1],
481 env->regwptr[2], env->regwptr[3],
482 env->regwptr[4], env->regwptr[5]);
483 }
484 if ((unsigned int)ret >= (unsigned int)(-515)) {
485 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
486 env->xcc |= PSR_CARRY;
487 #else
488 env->psr |= PSR_CARRY;
489 #endif
490 } else {
491 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
492 env->xcc &= ~PSR_CARRY;
493 #else
494 env->psr &= ~PSR_CARRY;
495 #endif
496 }
497 env->regwptr[0] = ret;
498 /* next instruction */
499 #if defined(TARGET_SPARC64)
500 if (bsd_type == target_openbsd &&
501 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
502 env->pc = env->gregs[2];
503 env->npc = env->pc + 4;
504 } else if (bsd_type == target_openbsd &&
505 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
506 env->pc = env->gregs[7];
507 env->npc = env->pc + 4;
508 } else {
509 env->pc = env->npc;
510 env->npc = env->npc + 4;
511 }
512 #else
513 env->pc = env->npc;
514 env->npc = env->npc + 4;
515 #endif
516 break;
517 case 0x83: /* flush windows */
518 #ifdef TARGET_ABI32
519 case 0x103:
520 #endif
521 flush_windows(env);
522 /* next instruction */
523 env->pc = env->npc;
524 env->npc = env->npc + 4;
525 break;
526 #ifndef TARGET_SPARC64
527 case TT_WIN_OVF: /* window overflow */
528 save_window(env);
529 break;
530 case TT_WIN_UNF: /* window underflow */
531 restore_window(env);
532 break;
533 case TT_TFAULT:
534 case TT_DFAULT:
535 #if 0
536 {
537 info.si_signo = SIGSEGV;
538 info.si_errno = 0;
539 /* XXX: check env->error_code */
540 info.si_code = TARGET_SEGV_MAPERR;
541 info._sifields._sigfault._addr = env->mmuregs[4];
542 queue_signal(env, info.si_signo, &info);
543 }
544 #endif
545 break;
546 #else
547 case TT_SPILL: /* window overflow */
548 save_window(env);
549 break;
550 case TT_FILL: /* window underflow */
551 restore_window(env);
552 break;
553 case TT_TFAULT:
554 case TT_DFAULT:
555 #if 0
556 {
557 info.si_signo = SIGSEGV;
558 info.si_errno = 0;
559 /* XXX: check env->error_code */
560 info.si_code = TARGET_SEGV_MAPERR;
561 if (trapnr == TT_DFAULT)
562 info._sifields._sigfault._addr = env->dmmuregs[4];
563 else
564 info._sifields._sigfault._addr = env->tsptr->tpc;
565 //queue_signal(env, info.si_signo, &info);
566 }
567 #endif
568 break;
569 #endif
570 case EXCP_INTERRUPT:
571 /* just indicate that signals should be handled asap */
572 break;
573 case EXCP_DEBUG:
574 {
575 int sig;
576
577 sig = gdb_handlesig (env, TARGET_SIGTRAP);
578 #if 0
579 if (sig)
580 {
581 info.si_signo = sig;
582 info.si_errno = 0;
583 info.si_code = TARGET_TRAP_BRKPT;
584 //queue_signal(env, info.si_signo, &info);
585 }
586 #endif
587 }
588 break;
589 default:
590 printf ("Unhandled trap: 0x%x\n", trapnr);
591 cpu_dump_state(env, stderr, fprintf, 0);
592 exit (1);
593 }
594 process_pending_signals (env);
595 }
596 }
597
598 #endif
599
600 static void usage(void)
601 {
602 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
603 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
604 "BSD CPU emulator (compiled for %s emulation)\n"
605 "\n"
606 "Standard options:\n"
607 "-h print this help\n"
608 "-g port wait gdb connection to port\n"
609 "-L path set the elf interpreter prefix (default=%s)\n"
610 "-s size set the stack size in bytes (default=%ld)\n"
611 "-cpu model select CPU (-cpu ? for list)\n"
612 "-drop-ld-preload drop LD_PRELOAD for target process\n"
613 "-E var=value sets/modifies targets environment variable(s)\n"
614 "-U var unsets targets environment variable(s)\n"
615 #if defined(CONFIG_USE_GUEST_BASE)
616 "-B address set guest_base address to address\n"
617 #endif
618 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
619 "\n"
620 "Debug options:\n"
621 "-d options activate log (logfile=%s)\n"
622 "-p pagesize set the host page size to 'pagesize'\n"
623 "-singlestep always run in singlestep mode\n"
624 "-strace log system calls\n"
625 "\n"
626 "Environment variables:\n"
627 "QEMU_STRACE Print system calls and arguments similar to the\n"
628 " 'strace' program. Enable by setting to any value.\n"
629 "You can use -E and -U options to set/unset environment variables\n"
630 "for target process. It is possible to provide several variables\n"
631 "by repeating the option. For example:\n"
632 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
633 "Note that if you provide several changes to single variable\n"
634 "last change will stay in effect.\n"
635 ,
636 TARGET_ARCH,
637 interp_prefix,
638 x86_stack_size,
639 DEBUG_LOGFILE);
640 exit(1);
641 }
642
643 THREAD CPUState *thread_env;
644
645 /* Assumes contents are already zeroed. */
646 void init_task_state(TaskState *ts)
647 {
648 int i;
649
650 ts->used = 1;
651 ts->first_free = ts->sigqueue_table;
652 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
653 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
654 }
655 ts->sigqueue_table[i].next = NULL;
656 }
657
658 int main(int argc, char **argv)
659 {
660 const char *filename;
661 const char *cpu_model;
662 struct target_pt_regs regs1, *regs = &regs1;
663 struct image_info info1, *info = &info1;
664 TaskState ts1, *ts = &ts1;
665 CPUState *env;
666 int optind;
667 const char *r;
668 int gdbstub_port = 0;
669 char **target_environ, **wrk;
670 envlist_t *envlist = NULL;
671 enum BSDType bsd_type = target_openbsd;
672
673 if (argc <= 1)
674 usage();
675
676 /* init debug */
677 cpu_set_log_filename(DEBUG_LOGFILE);
678
679 if ((envlist = envlist_create()) == NULL) {
680 (void) fprintf(stderr, "Unable to allocate envlist\n");
681 exit(1);
682 }
683
684 /* add current environment into the list */
685 for (wrk = environ; *wrk != NULL; wrk++) {
686 (void) envlist_setenv(envlist, *wrk);
687 }
688
689 cpu_model = NULL;
690 optind = 1;
691 for(;;) {
692 if (optind >= argc)
693 break;
694 r = argv[optind];
695 if (r[0] != '-')
696 break;
697 optind++;
698 r++;
699 if (!strcmp(r, "-")) {
700 break;
701 } else if (!strcmp(r, "d")) {
702 int mask;
703 const CPULogItem *item;
704
705 if (optind >= argc)
706 break;
707
708 r = argv[optind++];
709 mask = cpu_str_to_log_mask(r);
710 if (!mask) {
711 printf("Log items (comma separated):\n");
712 for(item = cpu_log_items; item->mask != 0; item++) {
713 printf("%-10s %s\n", item->name, item->help);
714 }
715 exit(1);
716 }
717 cpu_set_log(mask);
718 } else if (!strcmp(r, "E")) {
719 r = argv[optind++];
720 if (envlist_setenv(envlist, r) != 0)
721 usage();
722 } else if (!strcmp(r, "U")) {
723 r = argv[optind++];
724 if (envlist_unsetenv(envlist, r) != 0)
725 usage();
726 } else if (!strcmp(r, "s")) {
727 r = argv[optind++];
728 x86_stack_size = strtol(r, (char **)&r, 0);
729 if (x86_stack_size <= 0)
730 usage();
731 if (*r == 'M')
732 x86_stack_size *= 1024 * 1024;
733 else if (*r == 'k' || *r == 'K')
734 x86_stack_size *= 1024;
735 } else if (!strcmp(r, "L")) {
736 interp_prefix = argv[optind++];
737 } else if (!strcmp(r, "p")) {
738 qemu_host_page_size = atoi(argv[optind++]);
739 if (qemu_host_page_size == 0 ||
740 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
741 fprintf(stderr, "page size must be a power of two\n");
742 exit(1);
743 }
744 } else if (!strcmp(r, "g")) {
745 gdbstub_port = atoi(argv[optind++]);
746 } else if (!strcmp(r, "r")) {
747 qemu_uname_release = argv[optind++];
748 } else if (!strcmp(r, "cpu")) {
749 cpu_model = argv[optind++];
750 if (strcmp(cpu_model, "?") == 0) {
751 /* XXX: implement xxx_cpu_list for targets that still miss it */
752 #if defined(cpu_list)
753 cpu_list(stdout, &fprintf);
754 #endif
755 exit(1);
756 }
757 #if defined(CONFIG_USE_GUEST_BASE)
758 } else if (!strcmp(r, "B")) {
759 guest_base = strtol(argv[optind++], NULL, 0);
760 have_guest_base = 1;
761 #endif
762 } else if (!strcmp(r, "drop-ld-preload")) {
763 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
764 } else if (!strcmp(r, "bsd")) {
765 if (!strcasecmp(argv[optind], "freebsd")) {
766 bsd_type = target_freebsd;
767 } else if (!strcasecmp(argv[optind], "netbsd")) {
768 bsd_type = target_netbsd;
769 } else if (!strcasecmp(argv[optind], "openbsd")) {
770 bsd_type = target_openbsd;
771 } else {
772 usage();
773 }
774 optind++;
775 } else if (!strcmp(r, "singlestep")) {
776 singlestep = 1;
777 } else if (!strcmp(r, "strace")) {
778 do_strace = 1;
779 } else
780 {
781 usage();
782 }
783 }
784 if (optind >= argc)
785 usage();
786 filename = argv[optind];
787
788 /* Zero out regs */
789 memset(regs, 0, sizeof(struct target_pt_regs));
790
791 /* Zero out image_info */
792 memset(info, 0, sizeof(struct image_info));
793
794 /* Scan interp_prefix dir for replacement files. */
795 init_paths(interp_prefix);
796
797 if (cpu_model == NULL) {
798 #if defined(TARGET_I386)
799 #ifdef TARGET_X86_64
800 cpu_model = "qemu64";
801 #else
802 cpu_model = "qemu32";
803 #endif
804 #elif defined(TARGET_SPARC)
805 #ifdef TARGET_SPARC64
806 cpu_model = "TI UltraSparc II";
807 #else
808 cpu_model = "Fujitsu MB86904";
809 #endif
810 #else
811 cpu_model = "any";
812 #endif
813 }
814 cpu_exec_init_all(0);
815 /* NOTE: we need to init the CPU at this stage to get
816 qemu_host_page_size */
817 env = cpu_init(cpu_model);
818 if (!env) {
819 fprintf(stderr, "Unable to find CPU definition\n");
820 exit(1);
821 }
822 thread_env = env;
823
824 if (getenv("QEMU_STRACE")) {
825 do_strace = 1;
826 }
827
828 target_environ = envlist_to_environ(envlist, NULL);
829 envlist_free(envlist);
830
831 #if defined(CONFIG_USE_GUEST_BASE)
832 /*
833 * Now that page sizes are configured in cpu_init() we can do
834 * proper page alignment for guest_base.
835 */
836 guest_base = HOST_PAGE_ALIGN(guest_base);
837
838 /*
839 * Read in mmap_min_addr kernel parameter. This value is used
840 * When loading the ELF image to determine whether guest_base
841 * is needed.
842 *
843 * When user has explicitly set the quest base, we skip this
844 * test.
845 */
846 if (!have_guest_base) {
847 FILE *fp;
848
849 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
850 unsigned long tmp;
851 if (fscanf(fp, "%lu", &tmp) == 1) {
852 mmap_min_addr = tmp;
853 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
854 }
855 fclose(fp);
856 }
857 }
858 #endif /* CONFIG_USE_GUEST_BASE */
859
860 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
861 printf("Error loading %s\n", filename);
862 _exit(1);
863 }
864
865 for (wrk = target_environ; *wrk; wrk++) {
866 free(*wrk);
867 }
868
869 free(target_environ);
870
871 if (qemu_log_enabled()) {
872 #if defined(CONFIG_USE_GUEST_BASE)
873 qemu_log("guest_base 0x%lx\n", guest_base);
874 #endif
875 log_page_dump();
876
877 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
878 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
879 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
880 info->start_code);
881 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
882 info->start_data);
883 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
884 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
885 info->start_stack);
886 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
887 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
888 }
889
890 target_set_brk(info->brk);
891 syscall_init();
892 signal_init();
893
894 /* build Task State */
895 memset(ts, 0, sizeof(TaskState));
896 init_task_state(ts);
897 ts->info = info;
898 env->opaque = ts;
899
900 #if defined(TARGET_I386)
901 cpu_x86_set_cpl(env, 3);
902
903 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
904 env->hflags |= HF_PE_MASK;
905 if (env->cpuid_features & CPUID_SSE) {
906 env->cr[4] |= CR4_OSFXSR_MASK;
907 env->hflags |= HF_OSFXSR_MASK;
908 }
909 #ifndef TARGET_ABI32
910 /* enable 64 bit mode if possible */
911 if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
912 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
913 exit(1);
914 }
915 env->cr[4] |= CR4_PAE_MASK;
916 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
917 env->hflags |= HF_LMA_MASK;
918 #endif
919
920 /* flags setup : we activate the IRQs by default as in user mode */
921 env->eflags |= IF_MASK;
922
923 /* linux register setup */
924 #ifndef TARGET_ABI32
925 env->regs[R_EAX] = regs->rax;
926 env->regs[R_EBX] = regs->rbx;
927 env->regs[R_ECX] = regs->rcx;
928 env->regs[R_EDX] = regs->rdx;
929 env->regs[R_ESI] = regs->rsi;
930 env->regs[R_EDI] = regs->rdi;
931 env->regs[R_EBP] = regs->rbp;
932 env->regs[R_ESP] = regs->rsp;
933 env->eip = regs->rip;
934 #else
935 env->regs[R_EAX] = regs->eax;
936 env->regs[R_EBX] = regs->ebx;
937 env->regs[R_ECX] = regs->ecx;
938 env->regs[R_EDX] = regs->edx;
939 env->regs[R_ESI] = regs->esi;
940 env->regs[R_EDI] = regs->edi;
941 env->regs[R_EBP] = regs->ebp;
942 env->regs[R_ESP] = regs->esp;
943 env->eip = regs->eip;
944 #endif
945
946 /* linux interrupt setup */
947 #ifndef TARGET_ABI32
948 env->idt.limit = 511;
949 #else
950 env->idt.limit = 255;
951 #endif
952 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
953 PROT_READ|PROT_WRITE,
954 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
955 idt_table = g2h(env->idt.base);
956 set_idt(0, 0);
957 set_idt(1, 0);
958 set_idt(2, 0);
959 set_idt(3, 3);
960 set_idt(4, 3);
961 set_idt(5, 0);
962 set_idt(6, 0);
963 set_idt(7, 0);
964 set_idt(8, 0);
965 set_idt(9, 0);
966 set_idt(10, 0);
967 set_idt(11, 0);
968 set_idt(12, 0);
969 set_idt(13, 0);
970 set_idt(14, 0);
971 set_idt(15, 0);
972 set_idt(16, 0);
973 set_idt(17, 0);
974 set_idt(18, 0);
975 set_idt(19, 0);
976 set_idt(0x80, 3);
977
978 /* linux segment setup */
979 {
980 uint64_t *gdt_table;
981 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
982 PROT_READ|PROT_WRITE,
983 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
984 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
985 gdt_table = g2h(env->gdt.base);
986 #ifdef TARGET_ABI32
987 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
988 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
989 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
990 #else
991 /* 64 bit code segment */
992 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
993 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
994 DESC_L_MASK |
995 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
996 #endif
997 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
998 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
999 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1000 }
1001
1002 cpu_x86_load_seg(env, R_CS, __USER_CS);
1003 cpu_x86_load_seg(env, R_SS, __USER_DS);
1004 #ifdef TARGET_ABI32
1005 cpu_x86_load_seg(env, R_DS, __USER_DS);
1006 cpu_x86_load_seg(env, R_ES, __USER_DS);
1007 cpu_x86_load_seg(env, R_FS, __USER_DS);
1008 cpu_x86_load_seg(env, R_GS, __USER_DS);
1009 /* This hack makes Wine work... */
1010 env->segs[R_FS].selector = 0;
1011 #else
1012 cpu_x86_load_seg(env, R_DS, 0);
1013 cpu_x86_load_seg(env, R_ES, 0);
1014 cpu_x86_load_seg(env, R_FS, 0);
1015 cpu_x86_load_seg(env, R_GS, 0);
1016 #endif
1017 #elif defined(TARGET_SPARC)
1018 {
1019 int i;
1020 env->pc = regs->pc;
1021 env->npc = regs->npc;
1022 env->y = regs->y;
1023 for(i = 0; i < 8; i++)
1024 env->gregs[i] = regs->u_regs[i];
1025 for(i = 0; i < 8; i++)
1026 env->regwptr[i] = regs->u_regs[i + 8];
1027 }
1028 #else
1029 #error unsupported target CPU
1030 #endif
1031
1032 if (gdbstub_port) {
1033 gdbserver_start (gdbstub_port);
1034 gdb_handlesig(env, 0);
1035 }
1036 cpu_loop(env, bsd_type);
1037 /* never exits */
1038 return 0;
1039 }
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