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qcow2: Improve check for overlapping allocations
[qemu/kevin.git] / bsd-user / main.c
blobcc8498187af26af70261c75af2a3cede56e8e213
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 "cpu.h"
33 #include "tcg.h"
34 #include "qemu/timer.h"
35 #include "qemu/envlist.h"
36
37 int singlestep;
38 #if defined(CONFIG_USE_GUEST_BASE)
39 unsigned long mmap_min_addr;
40 unsigned long guest_base;
41 int have_guest_base;
42 unsigned long reserved_va;
43 #endif
44
45 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
46 const char *qemu_uname_release = CONFIG_UNAME_RELEASE;
47 extern char **environ;
48 enum BSDType bsd_type;
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(CPUX86State *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(CPUArchState *env)
73 {
74 }
75
76 static inline void cpu_exec_end(CPUArchState *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(CPUX86State *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)
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 if (bsd_type == target_freebsd) {
183 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
184 sizeof(int32_t);
185 int32_t syscall_nr = env->regs[R_EAX];
186 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
187
188 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
189 get_user_s32(syscall_nr, params);
190 params += sizeof(int32_t);
191 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
192 get_user_s32(syscall_nr, params);
193 params += sizeof(int64_t);
194 }
195 get_user_s32(arg1, params);
196 params += sizeof(int32_t);
197 get_user_s32(arg2, params);
198 params += sizeof(int32_t);
199 get_user_s32(arg3, params);
200 params += sizeof(int32_t);
201 get_user_s32(arg4, params);
202 params += sizeof(int32_t);
203 get_user_s32(arg5, params);
204 params += sizeof(int32_t);
205 get_user_s32(arg6, params);
206 params += sizeof(int32_t);
207 get_user_s32(arg7, params);
208 params += sizeof(int32_t);
209 get_user_s32(arg8, params);
210 env->regs[R_EAX] = do_freebsd_syscall(env,
211 syscall_nr,
212 arg1,
213 arg2,
214 arg3,
215 arg4,
216 arg5,
217 arg6,
218 arg7,
219 arg8);
220 } else { //if (bsd_type == target_openbsd)
221 env->regs[R_EAX] = do_openbsd_syscall(env,
222 env->regs[R_EAX],
223 env->regs[R_EBX],
224 env->regs[R_ECX],
225 env->regs[R_EDX],
226 env->regs[R_ESI],
227 env->regs[R_EDI],
228 env->regs[R_EBP]);
229 }
230 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
231 env->regs[R_EAX] = -env->regs[R_EAX];
232 env->eflags |= CC_C;
233 } else {
234 env->eflags &= ~CC_C;
235 }
236 break;
237 #ifndef TARGET_ABI32
238 case EXCP_SYSCALL:
239 /* syscall from syscall instruction */
240 if (bsd_type == target_freebsd)
241 env->regs[R_EAX] = do_freebsd_syscall(env,
242 env->regs[R_EAX],
243 env->regs[R_EDI],
244 env->regs[R_ESI],
245 env->regs[R_EDX],
246 env->regs[R_ECX],
247 env->regs[8],
248 env->regs[9], 0, 0);
249 else { //if (bsd_type == target_openbsd)
250 env->regs[R_EAX] = do_openbsd_syscall(env,
251 env->regs[R_EAX],
252 env->regs[R_EDI],
253 env->regs[R_ESI],
254 env->regs[R_EDX],
255 env->regs[10],
256 env->regs[8],
257 env->regs[9]);
258 }
259 env->eip = env->exception_next_eip;
260 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
261 env->regs[R_EAX] = -env->regs[R_EAX];
262 env->eflags |= CC_C;
263 } else {
264 env->eflags &= ~CC_C;
265 }
266 break;
267 #endif
268 #if 0
269 case EXCP0B_NOSEG:
270 case EXCP0C_STACK:
271 info.si_signo = SIGBUS;
272 info.si_errno = 0;
273 info.si_code = TARGET_SI_KERNEL;
274 info._sifields._sigfault._addr = 0;
275 queue_signal(env, info.si_signo, &info);
276 break;
277 case EXCP0D_GPF:
278 /* XXX: potential problem if ABI32 */
279 #ifndef TARGET_X86_64
280 if (env->eflags & VM_MASK) {
281 handle_vm86_fault(env);
282 } else
283 #endif
284 {
285 info.si_signo = SIGSEGV;
286 info.si_errno = 0;
287 info.si_code = TARGET_SI_KERNEL;
288 info._sifields._sigfault._addr = 0;
289 queue_signal(env, info.si_signo, &info);
290 }
291 break;
292 case EXCP0E_PAGE:
293 info.si_signo = SIGSEGV;
294 info.si_errno = 0;
295 if (!(env->error_code & 1))
296 info.si_code = TARGET_SEGV_MAPERR;
297 else
298 info.si_code = TARGET_SEGV_ACCERR;
299 info._sifields._sigfault._addr = env->cr[2];
300 queue_signal(env, info.si_signo, &info);
301 break;
302 case EXCP00_DIVZ:
303 #ifndef TARGET_X86_64
304 if (env->eflags & VM_MASK) {
305 handle_vm86_trap(env, trapnr);
306 } else
307 #endif
308 {
309 /* division by zero */
310 info.si_signo = SIGFPE;
311 info.si_errno = 0;
312 info.si_code = TARGET_FPE_INTDIV;
313 info._sifields._sigfault._addr = env->eip;
314 queue_signal(env, info.si_signo, &info);
315 }
316 break;
317 case EXCP01_DB:
318 case EXCP03_INT3:
319 #ifndef TARGET_X86_64
320 if (env->eflags & VM_MASK) {
321 handle_vm86_trap(env, trapnr);
322 } else
323 #endif
324 {
325 info.si_signo = SIGTRAP;
326 info.si_errno = 0;
327 if (trapnr == EXCP01_DB) {
328 info.si_code = TARGET_TRAP_BRKPT;
329 info._sifields._sigfault._addr = env->eip;
330 } else {
331 info.si_code = TARGET_SI_KERNEL;
332 info._sifields._sigfault._addr = 0;
333 }
334 queue_signal(env, info.si_signo, &info);
335 }
336 break;
337 case EXCP04_INTO:
338 case EXCP05_BOUND:
339 #ifndef TARGET_X86_64
340 if (env->eflags & VM_MASK) {
341 handle_vm86_trap(env, trapnr);
342 } else
343 #endif
344 {
345 info.si_signo = SIGSEGV;
346 info.si_errno = 0;
347 info.si_code = TARGET_SI_KERNEL;
348 info._sifields._sigfault._addr = 0;
349 queue_signal(env, info.si_signo, &info);
350 }
351 break;
352 case EXCP06_ILLOP:
353 info.si_signo = SIGILL;
354 info.si_errno = 0;
355 info.si_code = TARGET_ILL_ILLOPN;
356 info._sifields._sigfault._addr = env->eip;
357 queue_signal(env, info.si_signo, &info);
358 break;
359 #endif
360 case EXCP_INTERRUPT:
361 /* just indicate that signals should be handled asap */
362 break;
363 #if 0
364 case EXCP_DEBUG:
365 {
366 int sig;
367
368 sig = gdb_handlesig (env, TARGET_SIGTRAP);
369 if (sig)
370 {
371 info.si_signo = sig;
372 info.si_errno = 0;
373 info.si_code = TARGET_TRAP_BRKPT;
374 queue_signal(env, info.si_signo, &info);
375 }
376 }
377 break;
378 #endif
379 default:
380 pc = env->segs[R_CS].base + env->eip;
381 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
382 (long)pc, trapnr);
383 abort();
384 }
385 process_pending_signals(env);
386 }
387 }
388 #endif
389
390 #ifdef TARGET_SPARC
391 #define SPARC64_STACK_BIAS 2047
392
393 //#define DEBUG_WIN
394 /* WARNING: dealing with register windows _is_ complicated. More info
395 can be found at http://www.sics.se/~psm/sparcstack.html */
396 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
397 {
398 index = (index + cwp * 16) % (16 * env->nwindows);
399 /* wrap handling : if cwp is on the last window, then we use the
400 registers 'after' the end */
401 if (index < 8 && env->cwp == env->nwindows - 1)
402 index += 16 * env->nwindows;
403 return index;
404 }
405
406 /* save the register window 'cwp1' */
407 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
408 {
409 unsigned int i;
410 abi_ulong sp_ptr;
411
412 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
413 #ifdef TARGET_SPARC64
414 if (sp_ptr & 3)
415 sp_ptr += SPARC64_STACK_BIAS;
416 #endif
417 #if defined(DEBUG_WIN)
418 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
419 sp_ptr, cwp1);
420 #endif
421 for(i = 0; i < 16; i++) {
422 /* FIXME - what to do if put_user() fails? */
423 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
424 sp_ptr += sizeof(abi_ulong);
425 }
426 }
427
428 static void save_window(CPUSPARCState *env)
429 {
430 #ifndef TARGET_SPARC64
431 unsigned int new_wim;
432 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
433 ((1LL << env->nwindows) - 1);
434 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
435 env->wim = new_wim;
436 #else
437 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
438 env->cansave++;
439 env->canrestore--;
440 #endif
441 }
442
443 static void restore_window(CPUSPARCState *env)
444 {
445 #ifndef TARGET_SPARC64
446 unsigned int new_wim;
447 #endif
448 unsigned int i, cwp1;
449 abi_ulong sp_ptr;
450
451 #ifndef TARGET_SPARC64
452 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
453 ((1LL << env->nwindows) - 1);
454 #endif
455
456 /* restore the invalid window */
457 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
458 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
459 #ifdef TARGET_SPARC64
460 if (sp_ptr & 3)
461 sp_ptr += SPARC64_STACK_BIAS;
462 #endif
463 #if defined(DEBUG_WIN)
464 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
465 sp_ptr, cwp1);
466 #endif
467 for(i = 0; i < 16; i++) {
468 /* FIXME - what to do if get_user() fails? */
469 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
470 sp_ptr += sizeof(abi_ulong);
471 }
472 #ifdef TARGET_SPARC64
473 env->canrestore++;
474 if (env->cleanwin < env->nwindows - 1)
475 env->cleanwin++;
476 env->cansave--;
477 #else
478 env->wim = new_wim;
479 #endif
480 }
481
482 static void flush_windows(CPUSPARCState *env)
483 {
484 int offset, cwp1;
485
486 offset = 1;
487 for(;;) {
488 /* if restore would invoke restore_window(), then we can stop */
489 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
490 #ifndef TARGET_SPARC64
491 if (env->wim & (1 << cwp1))
492 break;
493 #else
494 if (env->canrestore == 0)
495 break;
496 env->cansave++;
497 env->canrestore--;
498 #endif
499 save_window_offset(env, cwp1);
500 offset++;
501 }
502 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
503 #ifndef TARGET_SPARC64
504 /* set wim so that restore will reload the registers */
505 env->wim = 1 << cwp1;
506 #endif
507 #if defined(DEBUG_WIN)
508 printf("flush_windows: nb=%d\n", offset - 1);
509 #endif
510 }
511
512 void cpu_loop(CPUSPARCState *env)
513 {
514 int trapnr, ret, syscall_nr;
515 //target_siginfo_t info;
516
517 while (1) {
518 trapnr = cpu_sparc_exec (env);
519
520 switch (trapnr) {
521 #ifndef TARGET_SPARC64
522 case 0x80:
523 #else
524 /* FreeBSD uses 0x141 for syscalls too */
525 case 0x141:
526 if (bsd_type != target_freebsd)
527 goto badtrap;
528 case 0x100:
529 #endif
530 syscall_nr = env->gregs[1];
531 if (bsd_type == target_freebsd)
532 ret = do_freebsd_syscall(env, syscall_nr,
533 env->regwptr[0], env->regwptr[1],
534 env->regwptr[2], env->regwptr[3],
535 env->regwptr[4], env->regwptr[5], 0, 0);
536 else if (bsd_type == target_netbsd)
537 ret = do_netbsd_syscall(env, syscall_nr,
538 env->regwptr[0], env->regwptr[1],
539 env->regwptr[2], env->regwptr[3],
540 env->regwptr[4], env->regwptr[5]);
541 else { //if (bsd_type == target_openbsd)
542 #if defined(TARGET_SPARC64)
543 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
544 TARGET_OPENBSD_SYSCALL_G2RFLAG);
545 #endif
546 ret = do_openbsd_syscall(env, syscall_nr,
547 env->regwptr[0], env->regwptr[1],
548 env->regwptr[2], env->regwptr[3],
549 env->regwptr[4], env->regwptr[5]);
550 }
551 if ((unsigned int)ret >= (unsigned int)(-515)) {
552 ret = -ret;
553 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
554 env->xcc |= PSR_CARRY;
555 #else
556 env->psr |= PSR_CARRY;
557 #endif
558 } else {
559 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
560 env->xcc &= ~PSR_CARRY;
561 #else
562 env->psr &= ~PSR_CARRY;
563 #endif
564 }
565 env->regwptr[0] = ret;
566 /* next instruction */
567 #if defined(TARGET_SPARC64)
568 if (bsd_type == target_openbsd &&
569 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
570 env->pc = env->gregs[2];
571 env->npc = env->pc + 4;
572 } else if (bsd_type == target_openbsd &&
573 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
574 env->pc = env->gregs[7];
575 env->npc = env->pc + 4;
576 } else {
577 env->pc = env->npc;
578 env->npc = env->npc + 4;
579 }
580 #else
581 env->pc = env->npc;
582 env->npc = env->npc + 4;
583 #endif
584 break;
585 case 0x83: /* flush windows */
586 #ifdef TARGET_ABI32
587 case 0x103:
588 #endif
589 flush_windows(env);
590 /* next instruction */
591 env->pc = env->npc;
592 env->npc = env->npc + 4;
593 break;
594 #ifndef TARGET_SPARC64
595 case TT_WIN_OVF: /* window overflow */
596 save_window(env);
597 break;
598 case TT_WIN_UNF: /* window underflow */
599 restore_window(env);
600 break;
601 case TT_TFAULT:
602 case TT_DFAULT:
603 #if 0
604 {
605 info.si_signo = SIGSEGV;
606 info.si_errno = 0;
607 /* XXX: check env->error_code */
608 info.si_code = TARGET_SEGV_MAPERR;
609 info._sifields._sigfault._addr = env->mmuregs[4];
610 queue_signal(env, info.si_signo, &info);
611 }
612 #endif
613 break;
614 #else
615 case TT_SPILL: /* window overflow */
616 save_window(env);
617 break;
618 case TT_FILL: /* window underflow */
619 restore_window(env);
620 break;
621 case TT_TFAULT:
622 case TT_DFAULT:
623 #if 0
624 {
625 info.si_signo = SIGSEGV;
626 info.si_errno = 0;
627 /* XXX: check env->error_code */
628 info.si_code = TARGET_SEGV_MAPERR;
629 if (trapnr == TT_DFAULT)
630 info._sifields._sigfault._addr = env->dmmuregs[4];
631 else
632 info._sifields._sigfault._addr = env->tsptr->tpc;
633 //queue_signal(env, info.si_signo, &info);
634 }
635 #endif
636 break;
637 #endif
638 case EXCP_INTERRUPT:
639 /* just indicate that signals should be handled asap */
640 break;
641 case EXCP_DEBUG:
642 {
643 int sig;
644
645 sig = gdb_handlesig (env, TARGET_SIGTRAP);
646 #if 0
647 if (sig)
648 {
649 info.si_signo = sig;
650 info.si_errno = 0;
651 info.si_code = TARGET_TRAP_BRKPT;
652 //queue_signal(env, info.si_signo, &info);
653 }
654 #endif
655 }
656 break;
657 default:
658 #ifdef TARGET_SPARC64
659 badtrap:
660 #endif
661 printf ("Unhandled trap: 0x%x\n", trapnr);
662 cpu_dump_state(env, stderr, fprintf, 0);
663 exit (1);
664 }
665 process_pending_signals (env);
666 }
667 }
668
669 #endif
670
671 static void usage(void)
672 {
673 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
674 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
675 "BSD CPU emulator (compiled for %s emulation)\n"
676 "\n"
677 "Standard options:\n"
678 "-h print this help\n"
679 "-g port wait gdb connection to port\n"
680 "-L path set the elf interpreter prefix (default=%s)\n"
681 "-s size set the stack size in bytes (default=%ld)\n"
682 "-cpu model select CPU (-cpu help for list)\n"
683 "-drop-ld-preload drop LD_PRELOAD for target process\n"
684 "-E var=value sets/modifies targets environment variable(s)\n"
685 "-U var unsets targets environment variable(s)\n"
686 #if defined(CONFIG_USE_GUEST_BASE)
687 "-B address set guest_base address to address\n"
688 #endif
689 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
690 "\n"
691 "Debug options:\n"
692 "-d item1[,...] enable logging of specified items\n"
693 " (use '-d help' for a list of log items)\n"
694 "-D logfile write logs to 'logfile' (default stderr)\n"
695 "-p pagesize set the host page size to 'pagesize'\n"
696 "-singlestep always run in singlestep mode\n"
697 "-strace log system calls\n"
698 "\n"
699 "Environment variables:\n"
700 "QEMU_STRACE Print system calls and arguments similar to the\n"
701 " 'strace' program. Enable by setting to any value.\n"
702 "You can use -E and -U options to set/unset environment variables\n"
703 "for target process. It is possible to provide several variables\n"
704 "by repeating the option. For example:\n"
705 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
706 "Note that if you provide several changes to single variable\n"
707 "last change will stay in effect.\n"
708 ,
709 TARGET_ARCH,
710 interp_prefix,
711 x86_stack_size);
712 exit(1);
713 }
714
715 THREAD CPUArchState *thread_env;
716
717 /* Assumes contents are already zeroed. */
718 void init_task_state(TaskState *ts)
719 {
720 int i;
721
722 ts->used = 1;
723 ts->first_free = ts->sigqueue_table;
724 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
725 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
726 }
727 ts->sigqueue_table[i].next = NULL;
728 }
729
730 int main(int argc, char **argv)
731 {
732 const char *filename;
733 const char *cpu_model;
734 const char *log_file = NULL;
735 const char *log_mask = NULL;
736 struct target_pt_regs regs1, *regs = &regs1;
737 struct image_info info1, *info = &info1;
738 TaskState ts1, *ts = &ts1;
739 CPUArchState *env;
740 int optind;
741 const char *r;
742 int gdbstub_port = 0;
743 char **target_environ, **wrk;
744 envlist_t *envlist = NULL;
745 bsd_type = target_openbsd;
746
747 if (argc <= 1)
748 usage();
749
750 module_call_init(MODULE_INIT_QOM);
751
752 if ((envlist = envlist_create()) == NULL) {
753 (void) fprintf(stderr, "Unable to allocate envlist\n");
754 exit(1);
755 }
756
757 /* add current environment into the list */
758 for (wrk = environ; *wrk != NULL; wrk++) {
759 (void) envlist_setenv(envlist, *wrk);
760 }
761
762 cpu_model = NULL;
763 #if defined(cpudef_setup)
764 cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
765 #endif
766
767 optind = 1;
768 for(;;) {
769 if (optind >= argc)
770 break;
771 r = argv[optind];
772 if (r[0] != '-')
773 break;
774 optind++;
775 r++;
776 if (!strcmp(r, "-")) {
777 break;
778 } else if (!strcmp(r, "d")) {
779 if (optind >= argc) {
780 break;
781 }
782 log_mask = argv[optind++];
783 } else if (!strcmp(r, "D")) {
784 if (optind >= argc) {
785 break;
786 }
787 log_file = argv[optind++];
788 } else if (!strcmp(r, "E")) {
789 r = argv[optind++];
790 if (envlist_setenv(envlist, r) != 0)
791 usage();
792 } else if (!strcmp(r, "ignore-environment")) {
793 envlist_free(envlist);
794 if ((envlist = envlist_create()) == NULL) {
795 (void) fprintf(stderr, "Unable to allocate envlist\n");
796 exit(1);
797 }
798 } else if (!strcmp(r, "U")) {
799 r = argv[optind++];
800 if (envlist_unsetenv(envlist, r) != 0)
801 usage();
802 } else if (!strcmp(r, "s")) {
803 r = argv[optind++];
804 x86_stack_size = strtol(r, (char **)&r, 0);
805 if (x86_stack_size <= 0)
806 usage();
807 if (*r == 'M')
808 x86_stack_size *= 1024 * 1024;
809 else if (*r == 'k' || *r == 'K')
810 x86_stack_size *= 1024;
811 } else if (!strcmp(r, "L")) {
812 interp_prefix = argv[optind++];
813 } else if (!strcmp(r, "p")) {
814 qemu_host_page_size = atoi(argv[optind++]);
815 if (qemu_host_page_size == 0 ||
816 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
817 fprintf(stderr, "page size must be a power of two\n");
818 exit(1);
819 }
820 } else if (!strcmp(r, "g")) {
821 gdbstub_port = atoi(argv[optind++]);
822 } else if (!strcmp(r, "r")) {
823 qemu_uname_release = argv[optind++];
824 } else if (!strcmp(r, "cpu")) {
825 cpu_model = argv[optind++];
826 if (is_help_option(cpu_model)) {
827 /* XXX: implement xxx_cpu_list for targets that still miss it */
828 #if defined(cpu_list)
829 cpu_list(stdout, &fprintf);
830 #endif
831 exit(1);
832 }
833 #if defined(CONFIG_USE_GUEST_BASE)
834 } else if (!strcmp(r, "B")) {
835 guest_base = strtol(argv[optind++], NULL, 0);
836 have_guest_base = 1;
837 #endif
838 } else if (!strcmp(r, "drop-ld-preload")) {
839 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
840 } else if (!strcmp(r, "bsd")) {
841 if (!strcasecmp(argv[optind], "freebsd")) {
842 bsd_type = target_freebsd;
843 } else if (!strcasecmp(argv[optind], "netbsd")) {
844 bsd_type = target_netbsd;
845 } else if (!strcasecmp(argv[optind], "openbsd")) {
846 bsd_type = target_openbsd;
847 } else {
848 usage();
849 }
850 optind++;
851 } else if (!strcmp(r, "singlestep")) {
852 singlestep = 1;
853 } else if (!strcmp(r, "strace")) {
854 do_strace = 1;
855 } else
856 {
857 usage();
858 }
859 }
860
861 /* init debug */
862 qemu_set_log_filename(log_file);
863 if (log_mask) {
864 int mask;
865
866 mask = qemu_str_to_log_mask(log_mask);
867 if (!mask) {
868 qemu_print_log_usage(stdout);
869 exit(1);
870 }
871 qemu_set_log(mask);
872 }
873
874 if (optind >= argc) {
875 usage();
876 }
877 filename = argv[optind];
878
879 /* Zero out regs */
880 memset(regs, 0, sizeof(struct target_pt_regs));
881
882 /* Zero out image_info */
883 memset(info, 0, sizeof(struct image_info));
884
885 /* Scan interp_prefix dir for replacement files. */
886 init_paths(interp_prefix);
887
888 if (cpu_model == NULL) {
889 #if defined(TARGET_I386)
890 #ifdef TARGET_X86_64
891 cpu_model = "qemu64";
892 #else
893 cpu_model = "qemu32";
894 #endif
895 #elif defined(TARGET_SPARC)
896 #ifdef TARGET_SPARC64
897 cpu_model = "TI UltraSparc II";
898 #else
899 cpu_model = "Fujitsu MB86904";
900 #endif
901 #else
902 cpu_model = "any";
903 #endif
904 }
905 tcg_exec_init(0);
906 cpu_exec_init_all();
907 /* NOTE: we need to init the CPU at this stage to get
908 qemu_host_page_size */
909 env = cpu_init(cpu_model);
910 if (!env) {
911 fprintf(stderr, "Unable to find CPU definition\n");
912 exit(1);
913 }
914 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
915 cpu_reset(ENV_GET_CPU(env));
916 #endif
917 thread_env = env;
918
919 if (getenv("QEMU_STRACE")) {
920 do_strace = 1;
921 }
922
923 target_environ = envlist_to_environ(envlist, NULL);
924 envlist_free(envlist);
925
926 #if defined(CONFIG_USE_GUEST_BASE)
927 /*
928 * Now that page sizes are configured in cpu_init() we can do
929 * proper page alignment for guest_base.
930 */
931 guest_base = HOST_PAGE_ALIGN(guest_base);
932
933 /*
934 * Read in mmap_min_addr kernel parameter. This value is used
935 * When loading the ELF image to determine whether guest_base
936 * is needed.
937 *
938 * When user has explicitly set the quest base, we skip this
939 * test.
940 */
941 if (!have_guest_base) {
942 FILE *fp;
943
944 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
945 unsigned long tmp;
946 if (fscanf(fp, "%lu", &tmp) == 1) {
947 mmap_min_addr = tmp;
948 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
949 }
950 fclose(fp);
951 }
952 }
953 #endif /* CONFIG_USE_GUEST_BASE */
954
955 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
956 printf("Error loading %s\n", filename);
957 _exit(1);
958 }
959
960 for (wrk = target_environ; *wrk; wrk++) {
961 free(*wrk);
962 }
963
964 free(target_environ);
965
966 if (qemu_log_enabled()) {
967 #if defined(CONFIG_USE_GUEST_BASE)
968 qemu_log("guest_base 0x%lx\n", guest_base);
969 #endif
970 log_page_dump();
971
972 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
973 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
974 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
975 info->start_code);
976 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
977 info->start_data);
978 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
979 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
980 info->start_stack);
981 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
982 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
983 }
984
985 target_set_brk(info->brk);
986 syscall_init();
987 signal_init();
988
989 #if defined(CONFIG_USE_GUEST_BASE)
990 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
991 generating the prologue until now so that the prologue can take
992 the real value of GUEST_BASE into account. */
993 tcg_prologue_init(&tcg_ctx);
994 #endif
995
996 /* build Task State */
997 memset(ts, 0, sizeof(TaskState));
998 init_task_state(ts);
999 ts->info = info;
1000 env->opaque = ts;
1001
1002 #if defined(TARGET_I386)
1003 cpu_x86_set_cpl(env, 3);
1004
1005 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1006 env->hflags |= HF_PE_MASK;
1007 if (env->cpuid_features & CPUID_SSE) {
1008 env->cr[4] |= CR4_OSFXSR_MASK;
1009 env->hflags |= HF_OSFXSR_MASK;
1010 }
1011 #ifndef TARGET_ABI32
1012 /* enable 64 bit mode if possible */
1013 if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
1014 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1015 exit(1);
1016 }
1017 env->cr[4] |= CR4_PAE_MASK;
1018 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1019 env->hflags |= HF_LMA_MASK;
1020 #endif
1021
1022 /* flags setup : we activate the IRQs by default as in user mode */
1023 env->eflags |= IF_MASK;
1024
1025 /* linux register setup */
1026 #ifndef TARGET_ABI32
1027 env->regs[R_EAX] = regs->rax;
1028 env->regs[R_EBX] = regs->rbx;
1029 env->regs[R_ECX] = regs->rcx;
1030 env->regs[R_EDX] = regs->rdx;
1031 env->regs[R_ESI] = regs->rsi;
1032 env->regs[R_EDI] = regs->rdi;
1033 env->regs[R_EBP] = regs->rbp;
1034 env->regs[R_ESP] = regs->rsp;
1035 env->eip = regs->rip;
1036 #else
1037 env->regs[R_EAX] = regs->eax;
1038 env->regs[R_EBX] = regs->ebx;
1039 env->regs[R_ECX] = regs->ecx;
1040 env->regs[R_EDX] = regs->edx;
1041 env->regs[R_ESI] = regs->esi;
1042 env->regs[R_EDI] = regs->edi;
1043 env->regs[R_EBP] = regs->ebp;
1044 env->regs[R_ESP] = regs->esp;
1045 env->eip = regs->eip;
1046 #endif
1047
1048 /* linux interrupt setup */
1049 #ifndef TARGET_ABI32
1050 env->idt.limit = 511;
1051 #else
1052 env->idt.limit = 255;
1053 #endif
1054 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1055 PROT_READ|PROT_WRITE,
1056 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1057 idt_table = g2h(env->idt.base);
1058 set_idt(0, 0);
1059 set_idt(1, 0);
1060 set_idt(2, 0);
1061 set_idt(3, 3);
1062 set_idt(4, 3);
1063 set_idt(5, 0);
1064 set_idt(6, 0);
1065 set_idt(7, 0);
1066 set_idt(8, 0);
1067 set_idt(9, 0);
1068 set_idt(10, 0);
1069 set_idt(11, 0);
1070 set_idt(12, 0);
1071 set_idt(13, 0);
1072 set_idt(14, 0);
1073 set_idt(15, 0);
1074 set_idt(16, 0);
1075 set_idt(17, 0);
1076 set_idt(18, 0);
1077 set_idt(19, 0);
1078 set_idt(0x80, 3);
1079
1080 /* linux segment setup */
1081 {
1082 uint64_t *gdt_table;
1083 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1084 PROT_READ|PROT_WRITE,
1085 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1086 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1087 gdt_table = g2h(env->gdt.base);
1088 #ifdef TARGET_ABI32
1089 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1090 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1091 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1092 #else
1093 /* 64 bit code segment */
1094 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1095 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1096 DESC_L_MASK |
1097 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1098 #endif
1099 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1100 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1101 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1102 }
1103
1104 cpu_x86_load_seg(env, R_CS, __USER_CS);
1105 cpu_x86_load_seg(env, R_SS, __USER_DS);
1106 #ifdef TARGET_ABI32
1107 cpu_x86_load_seg(env, R_DS, __USER_DS);
1108 cpu_x86_load_seg(env, R_ES, __USER_DS);
1109 cpu_x86_load_seg(env, R_FS, __USER_DS);
1110 cpu_x86_load_seg(env, R_GS, __USER_DS);
1111 /* This hack makes Wine work... */
1112 env->segs[R_FS].selector = 0;
1113 #else
1114 cpu_x86_load_seg(env, R_DS, 0);
1115 cpu_x86_load_seg(env, R_ES, 0);
1116 cpu_x86_load_seg(env, R_FS, 0);
1117 cpu_x86_load_seg(env, R_GS, 0);
1118 #endif
1119 #elif defined(TARGET_SPARC)
1120 {
1121 int i;
1122 env->pc = regs->pc;
1123 env->npc = regs->npc;
1124 env->y = regs->y;
1125 for(i = 0; i < 8; i++)
1126 env->gregs[i] = regs->u_regs[i];
1127 for(i = 0; i < 8; i++)
1128 env->regwptr[i] = regs->u_regs[i + 8];
1129 }
1130 #else
1131 #error unsupported target CPU
1132 #endif
1133
1134 if (gdbstub_port) {
1135 gdbserver_start (gdbstub_port);
1136 gdb_handlesig(env, 0);
1137 }
1138 cpu_loop(env);
1139 /* never exits */
1140 return 0;
1141 }
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