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target-alpha: Initialize fpcr
[qemu.git] / bsd-user / main.c
blob9f8683d2e6d31d87a75f4a05de908525cfa45477
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 enum BSDType bsd_type;
50
51 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
52 we allocate a bigger stack. Need a better solution, for example
53 by remapping the process stack directly at the right place */
54 unsigned long x86_stack_size = 512 * 1024;
55
56 void gemu_log(const char *fmt, ...)
57 {
58 va_list ap;
59
60 va_start(ap, fmt);
61 vfprintf(stderr, fmt, ap);
62 va_end(ap);
63 }
64
65 #if defined(TARGET_I386)
66 int cpu_get_pic_interrupt(CPUState *env)
67 {
68 return -1;
69 }
70 #endif
71
72 /* These are no-ops because we are not threadsafe. */
73 static inline void cpu_exec_start(CPUState *env)
74 {
75 }
76
77 static inline void cpu_exec_end(CPUState *env)
78 {
79 }
80
81 static inline void start_exclusive(void)
82 {
83 }
84
85 static inline void end_exclusive(void)
86 {
87 }
88
89 void fork_start(void)
90 {
91 }
92
93 void fork_end(int child)
94 {
95 if (child) {
96 gdbserver_fork(thread_env);
97 }
98 }
99
100 void cpu_list_lock(void)
101 {
102 }
103
104 void cpu_list_unlock(void)
105 {
106 }
107
108 #ifdef TARGET_I386
109 /***********************************************************/
110 /* CPUX86 core interface */
111
112 void cpu_smm_update(CPUState *env)
113 {
114 }
115
116 uint64_t cpu_get_tsc(CPUX86State *env)
117 {
118 return cpu_get_real_ticks();
119 }
120
121 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
122 int flags)
123 {
124 unsigned int e1, e2;
125 uint32_t *p;
126 e1 = (addr << 16) | (limit & 0xffff);
127 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
128 e2 |= flags;
129 p = ptr;
130 p[0] = tswap32(e1);
131 p[1] = tswap32(e2);
132 }
133
134 static uint64_t *idt_table;
135 #ifdef TARGET_X86_64
136 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
137 uint64_t addr, unsigned int sel)
138 {
139 uint32_t *p, e1, e2;
140 e1 = (addr & 0xffff) | (sel << 16);
141 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
142 p = ptr;
143 p[0] = tswap32(e1);
144 p[1] = tswap32(e2);
145 p[2] = tswap32(addr >> 32);
146 p[3] = 0;
147 }
148 /* only dpl matters as we do only user space emulation */
149 static void set_idt(int n, unsigned int dpl)
150 {
151 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
152 }
153 #else
154 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
155 uint32_t addr, unsigned int sel)
156 {
157 uint32_t *p, e1, e2;
158 e1 = (addr & 0xffff) | (sel << 16);
159 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
160 p = ptr;
161 p[0] = tswap32(e1);
162 p[1] = tswap32(e2);
163 }
164
165 /* only dpl matters as we do only user space emulation */
166 static void set_idt(int n, unsigned int dpl)
167 {
168 set_gate(idt_table + n, 0, dpl, 0, 0);
169 }
170 #endif
171
172 void cpu_loop(CPUX86State *env)
173 {
174 int trapnr;
175 abi_ulong pc;
176 //target_siginfo_t info;
177
178 for(;;) {
179 trapnr = cpu_x86_exec(env);
180 switch(trapnr) {
181 case 0x80:
182 /* syscall from int $0x80 */
183 if (bsd_type == target_freebsd) {
184 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
185 sizeof(int32_t);
186 int32_t syscall_nr = env->regs[R_EAX];
187 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
188
189 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
190 get_user_s32(syscall_nr, params);
191 params += sizeof(int32_t);
192 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
193 get_user_s32(syscall_nr, params);
194 params += sizeof(int64_t);
195 }
196 get_user_s32(arg1, params);
197 params += sizeof(int32_t);
198 get_user_s32(arg2, params);
199 params += sizeof(int32_t);
200 get_user_s32(arg3, params);
201 params += sizeof(int32_t);
202 get_user_s32(arg4, params);
203 params += sizeof(int32_t);
204 get_user_s32(arg5, params);
205 params += sizeof(int32_t);
206 get_user_s32(arg6, params);
207 params += sizeof(int32_t);
208 get_user_s32(arg7, params);
209 params += sizeof(int32_t);
210 get_user_s32(arg8, params);
211 env->regs[R_EAX] = do_freebsd_syscall(env,
212 syscall_nr,
213 arg1,
214 arg2,
215 arg3,
216 arg4,
217 arg5,
218 arg6,
219 arg7,
220 arg8);
221 } else { //if (bsd_type == target_openbsd)
222 env->regs[R_EAX] = do_openbsd_syscall(env,
223 env->regs[R_EAX],
224 env->regs[R_EBX],
225 env->regs[R_ECX],
226 env->regs[R_EDX],
227 env->regs[R_ESI],
228 env->regs[R_EDI],
229 env->regs[R_EBP]);
230 }
231 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
232 env->regs[R_EAX] = -env->regs[R_EAX];
233 env->eflags |= CC_C;
234 } else {
235 env->eflags &= ~CC_C;
236 }
237 break;
238 #ifndef TARGET_ABI32
239 case EXCP_SYSCALL:
240 /* syscall from syscall intruction */
241 if (bsd_type == target_freebsd)
242 env->regs[R_EAX] = do_freebsd_syscall(env,
243 env->regs[R_EAX],
244 env->regs[R_EDI],
245 env->regs[R_ESI],
246 env->regs[R_EDX],
247 env->regs[R_ECX],
248 env->regs[8],
249 env->regs[9], 0, 0);
250 else { //if (bsd_type == target_openbsd)
251 env->regs[R_EAX] = do_openbsd_syscall(env,
252 env->regs[R_EAX],
253 env->regs[R_EDI],
254 env->regs[R_ESI],
255 env->regs[R_EDX],
256 env->regs[10],
257 env->regs[8],
258 env->regs[9]);
259 }
260 env->eip = env->exception_next_eip;
261 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
262 env->regs[R_EAX] = -env->regs[R_EAX];
263 env->eflags |= CC_C;
264 } else {
265 env->eflags &= ~CC_C;
266 }
267 break;
268 #endif
269 #if 0
270 case EXCP0B_NOSEG:
271 case EXCP0C_STACK:
272 info.si_signo = SIGBUS;
273 info.si_errno = 0;
274 info.si_code = TARGET_SI_KERNEL;
275 info._sifields._sigfault._addr = 0;
276 queue_signal(env, info.si_signo, &info);
277 break;
278 case EXCP0D_GPF:
279 /* XXX: potential problem if ABI32 */
280 #ifndef TARGET_X86_64
281 if (env->eflags & VM_MASK) {
282 handle_vm86_fault(env);
283 } else
284 #endif
285 {
286 info.si_signo = SIGSEGV;
287 info.si_errno = 0;
288 info.si_code = TARGET_SI_KERNEL;
289 info._sifields._sigfault._addr = 0;
290 queue_signal(env, info.si_signo, &info);
291 }
292 break;
293 case EXCP0E_PAGE:
294 info.si_signo = SIGSEGV;
295 info.si_errno = 0;
296 if (!(env->error_code & 1))
297 info.si_code = TARGET_SEGV_MAPERR;
298 else
299 info.si_code = TARGET_SEGV_ACCERR;
300 info._sifields._sigfault._addr = env->cr[2];
301 queue_signal(env, info.si_signo, &info);
302 break;
303 case EXCP00_DIVZ:
304 #ifndef TARGET_X86_64
305 if (env->eflags & VM_MASK) {
306 handle_vm86_trap(env, trapnr);
307 } else
308 #endif
309 {
310 /* division by zero */
311 info.si_signo = SIGFPE;
312 info.si_errno = 0;
313 info.si_code = TARGET_FPE_INTDIV;
314 info._sifields._sigfault._addr = env->eip;
315 queue_signal(env, info.si_signo, &info);
316 }
317 break;
318 case EXCP01_DB:
319 case EXCP03_INT3:
320 #ifndef TARGET_X86_64
321 if (env->eflags & VM_MASK) {
322 handle_vm86_trap(env, trapnr);
323 } else
324 #endif
325 {
326 info.si_signo = SIGTRAP;
327 info.si_errno = 0;
328 if (trapnr == EXCP01_DB) {
329 info.si_code = TARGET_TRAP_BRKPT;
330 info._sifields._sigfault._addr = env->eip;
331 } else {
332 info.si_code = TARGET_SI_KERNEL;
333 info._sifields._sigfault._addr = 0;
334 }
335 queue_signal(env, info.si_signo, &info);
336 }
337 break;
338 case EXCP04_INTO:
339 case EXCP05_BOUND:
340 #ifndef TARGET_X86_64
341 if (env->eflags & VM_MASK) {
342 handle_vm86_trap(env, trapnr);
343 } else
344 #endif
345 {
346 info.si_signo = SIGSEGV;
347 info.si_errno = 0;
348 info.si_code = TARGET_SI_KERNEL;
349 info._sifields._sigfault._addr = 0;
350 queue_signal(env, info.si_signo, &info);
351 }
352 break;
353 case EXCP06_ILLOP:
354 info.si_signo = SIGILL;
355 info.si_errno = 0;
356 info.si_code = TARGET_ILL_ILLOPN;
357 info._sifields._sigfault._addr = env->eip;
358 queue_signal(env, info.si_signo, &info);
359 break;
360 #endif
361 case EXCP_INTERRUPT:
362 /* just indicate that signals should be handled asap */
363 break;
364 #if 0
365 case EXCP_DEBUG:
366 {
367 int sig;
368
369 sig = gdb_handlesig (env, TARGET_SIGTRAP);
370 if (sig)
371 {
372 info.si_signo = sig;
373 info.si_errno = 0;
374 info.si_code = TARGET_TRAP_BRKPT;
375 queue_signal(env, info.si_signo, &info);
376 }
377 }
378 break;
379 #endif
380 default:
381 pc = env->segs[R_CS].base + env->eip;
382 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
383 (long)pc, trapnr);
384 abort();
385 }
386 process_pending_signals(env);
387 }
388 }
389 #endif
390
391 #ifdef TARGET_SPARC
392 #define SPARC64_STACK_BIAS 2047
393
394 //#define DEBUG_WIN
395 /* WARNING: dealing with register windows _is_ complicated. More info
396 can be found at http://www.sics.se/~psm/sparcstack.html */
397 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
398 {
399 index = (index + cwp * 16) % (16 * env->nwindows);
400 /* wrap handling : if cwp is on the last window, then we use the
401 registers 'after' the end */
402 if (index < 8 && env->cwp == env->nwindows - 1)
403 index += 16 * env->nwindows;
404 return index;
405 }
406
407 /* save the register window 'cwp1' */
408 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
409 {
410 unsigned int i;
411 abi_ulong sp_ptr;
412
413 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
414 #ifdef TARGET_SPARC64
415 if (sp_ptr & 3)
416 sp_ptr += SPARC64_STACK_BIAS;
417 #endif
418 #if defined(DEBUG_WIN)
419 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
420 sp_ptr, cwp1);
421 #endif
422 for(i = 0; i < 16; i++) {
423 /* FIXME - what to do if put_user() fails? */
424 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
425 sp_ptr += sizeof(abi_ulong);
426 }
427 }
428
429 static void save_window(CPUSPARCState *env)
430 {
431 #ifndef TARGET_SPARC64
432 unsigned int new_wim;
433 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
434 ((1LL << env->nwindows) - 1);
435 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
436 env->wim = new_wim;
437 #else
438 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
439 env->cansave++;
440 env->canrestore--;
441 #endif
442 }
443
444 static void restore_window(CPUSPARCState *env)
445 {
446 #ifndef TARGET_SPARC64
447 unsigned int new_wim;
448 #endif
449 unsigned int i, cwp1;
450 abi_ulong sp_ptr;
451
452 #ifndef TARGET_SPARC64
453 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
454 ((1LL << env->nwindows) - 1);
455 #endif
456
457 /* restore the invalid window */
458 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
459 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
460 #ifdef TARGET_SPARC64
461 if (sp_ptr & 3)
462 sp_ptr += SPARC64_STACK_BIAS;
463 #endif
464 #if defined(DEBUG_WIN)
465 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
466 sp_ptr, cwp1);
467 #endif
468 for(i = 0; i < 16; i++) {
469 /* FIXME - what to do if get_user() fails? */
470 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
471 sp_ptr += sizeof(abi_ulong);
472 }
473 #ifdef TARGET_SPARC64
474 env->canrestore++;
475 if (env->cleanwin < env->nwindows - 1)
476 env->cleanwin++;
477 env->cansave--;
478 #else
479 env->wim = new_wim;
480 #endif
481 }
482
483 static void flush_windows(CPUSPARCState *env)
484 {
485 int offset, cwp1;
486
487 offset = 1;
488 for(;;) {
489 /* if restore would invoke restore_window(), then we can stop */
490 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
491 #ifndef TARGET_SPARC64
492 if (env->wim & (1 << cwp1))
493 break;
494 #else
495 if (env->canrestore == 0)
496 break;
497 env->cansave++;
498 env->canrestore--;
499 #endif
500 save_window_offset(env, cwp1);
501 offset++;
502 }
503 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
504 #ifndef TARGET_SPARC64
505 /* set wim so that restore will reload the registers */
506 env->wim = 1 << cwp1;
507 #endif
508 #if defined(DEBUG_WIN)
509 printf("flush_windows: nb=%d\n", offset - 1);
510 #endif
511 }
512
513 void cpu_loop(CPUSPARCState *env)
514 {
515 int trapnr, ret, syscall_nr;
516 //target_siginfo_t info;
517
518 while (1) {
519 trapnr = cpu_sparc_exec (env);
520
521 switch (trapnr) {
522 #ifndef TARGET_SPARC64
523 case 0x80:
524 #else
525 /* FreeBSD uses 0x141 for syscalls too */
526 case 0x141:
527 if (bsd_type != target_freebsd)
528 goto badtrap;
529 case 0x100:
530 #endif
531 syscall_nr = env->gregs[1];
532 if (bsd_type == target_freebsd)
533 ret = do_freebsd_syscall(env, syscall_nr,
534 env->regwptr[0], env->regwptr[1],
535 env->regwptr[2], env->regwptr[3],
536 env->regwptr[4], env->regwptr[5], 0, 0);
537 else if (bsd_type == target_netbsd)
538 ret = do_netbsd_syscall(env, syscall_nr,
539 env->regwptr[0], env->regwptr[1],
540 env->regwptr[2], env->regwptr[3],
541 env->regwptr[4], env->regwptr[5]);
542 else { //if (bsd_type == target_openbsd)
543 #if defined(TARGET_SPARC64)
544 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
545 TARGET_OPENBSD_SYSCALL_G2RFLAG);
546 #endif
547 ret = do_openbsd_syscall(env, syscall_nr,
548 env->regwptr[0], env->regwptr[1],
549 env->regwptr[2], env->regwptr[3],
550 env->regwptr[4], env->regwptr[5]);
551 }
552 if ((unsigned int)ret >= (unsigned int)(-515)) {
553 ret = -ret;
554 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
555 env->xcc |= PSR_CARRY;
556 #else
557 env->psr |= PSR_CARRY;
558 #endif
559 } else {
560 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
561 env->xcc &= ~PSR_CARRY;
562 #else
563 env->psr &= ~PSR_CARRY;
564 #endif
565 }
566 env->regwptr[0] = ret;
567 /* next instruction */
568 #if defined(TARGET_SPARC64)
569 if (bsd_type == target_openbsd &&
570 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
571 env->pc = env->gregs[2];
572 env->npc = env->pc + 4;
573 } else if (bsd_type == target_openbsd &&
574 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
575 env->pc = env->gregs[7];
576 env->npc = env->pc + 4;
577 } else {
578 env->pc = env->npc;
579 env->npc = env->npc + 4;
580 }
581 #else
582 env->pc = env->npc;
583 env->npc = env->npc + 4;
584 #endif
585 break;
586 case 0x83: /* flush windows */
587 #ifdef TARGET_ABI32
588 case 0x103:
589 #endif
590 flush_windows(env);
591 /* next instruction */
592 env->pc = env->npc;
593 env->npc = env->npc + 4;
594 break;
595 #ifndef TARGET_SPARC64
596 case TT_WIN_OVF: /* window overflow */
597 save_window(env);
598 break;
599 case TT_WIN_UNF: /* window underflow */
600 restore_window(env);
601 break;
602 case TT_TFAULT:
603 case TT_DFAULT:
604 #if 0
605 {
606 info.si_signo = SIGSEGV;
607 info.si_errno = 0;
608 /* XXX: check env->error_code */
609 info.si_code = TARGET_SEGV_MAPERR;
610 info._sifields._sigfault._addr = env->mmuregs[4];
611 queue_signal(env, info.si_signo, &info);
612 }
613 #endif
614 break;
615 #else
616 case TT_SPILL: /* window overflow */
617 save_window(env);
618 break;
619 case TT_FILL: /* window underflow */
620 restore_window(env);
621 break;
622 case TT_TFAULT:
623 case TT_DFAULT:
624 #if 0
625 {
626 info.si_signo = SIGSEGV;
627 info.si_errno = 0;
628 /* XXX: check env->error_code */
629 info.si_code = TARGET_SEGV_MAPERR;
630 if (trapnr == TT_DFAULT)
631 info._sifields._sigfault._addr = env->dmmuregs[4];
632 else
633 info._sifields._sigfault._addr = env->tsptr->tpc;
634 //queue_signal(env, info.si_signo, &info);
635 }
636 #endif
637 break;
638 #endif
639 case EXCP_INTERRUPT:
640 /* just indicate that signals should be handled asap */
641 break;
642 case EXCP_DEBUG:
643 {
644 int sig;
645
646 sig = gdb_handlesig (env, TARGET_SIGTRAP);
647 #if 0
648 if (sig)
649 {
650 info.si_signo = sig;
651 info.si_errno = 0;
652 info.si_code = TARGET_TRAP_BRKPT;
653 //queue_signal(env, info.si_signo, &info);
654 }
655 #endif
656 }
657 break;
658 default:
659 #ifdef TARGET_SPARC64
660 badtrap:
661 #endif
662 printf ("Unhandled trap: 0x%x\n", trapnr);
663 cpu_dump_state(env, stderr, fprintf, 0);
664 exit (1);
665 }
666 process_pending_signals (env);
667 }
668 }
669
670 #endif
671
672 static void usage(void)
673 {
674 printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2008 Fabrice Bellard\n"
675 "usage: qemu-" TARGET_ARCH " [options] program [arguments...]\n"
676 "BSD CPU emulator (compiled for %s emulation)\n"
677 "\n"
678 "Standard options:\n"
679 "-h print this help\n"
680 "-g port wait gdb connection to port\n"
681 "-L path set the elf interpreter prefix (default=%s)\n"
682 "-s size set the stack size in bytes (default=%ld)\n"
683 "-cpu model select CPU (-cpu ? for list)\n"
684 "-drop-ld-preload drop LD_PRELOAD for target process\n"
685 "-E var=value sets/modifies targets environment variable(s)\n"
686 "-U var unsets targets environment variable(s)\n"
687 #if defined(CONFIG_USE_GUEST_BASE)
688 "-B address set guest_base address to address\n"
689 #endif
690 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
691 "\n"
692 "Debug options:\n"
693 "-d options activate log (logfile=%s)\n"
694 "-p pagesize set the host page size to 'pagesize'\n"
695 "-singlestep always run in singlestep mode\n"
696 "-strace log system calls\n"
697 "\n"
698 "Environment variables:\n"
699 "QEMU_STRACE Print system calls and arguments similar to the\n"
700 " 'strace' program. Enable by setting to any value.\n"
701 "You can use -E and -U options to set/unset environment variables\n"
702 "for target process. It is possible to provide several variables\n"
703 "by repeating the option. For example:\n"
704 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
705 "Note that if you provide several changes to single variable\n"
706 "last change will stay in effect.\n"
707 ,
708 TARGET_ARCH,
709 interp_prefix,
710 x86_stack_size,
711 DEBUG_LOGFILE);
712 exit(1);
713 }
714
715 THREAD CPUState *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 struct target_pt_regs regs1, *regs = &regs1;
735 struct image_info info1, *info = &info1;
736 TaskState ts1, *ts = &ts1;
737 CPUState *env;
738 int optind;
739 const char *r;
740 int gdbstub_port = 0;
741 char **target_environ, **wrk;
742 envlist_t *envlist = NULL;
743 bsd_type = target_openbsd;
744
745 if (argc <= 1)
746 usage();
747
748 /* init debug */
749 cpu_set_log_filename(DEBUG_LOGFILE);
750
751 if ((envlist = envlist_create()) == NULL) {
752 (void) fprintf(stderr, "Unable to allocate envlist\n");
753 exit(1);
754 }
755
756 /* add current environment into the list */
757 for (wrk = environ; *wrk != NULL; wrk++) {
758 (void) envlist_setenv(envlist, *wrk);
759 }
760
761 cpu_model = NULL;
762 optind = 1;
763 for(;;) {
764 if (optind >= argc)
765 break;
766 r = argv[optind];
767 if (r[0] != '-')
768 break;
769 optind++;
770 r++;
771 if (!strcmp(r, "-")) {
772 break;
773 } else if (!strcmp(r, "d")) {
774 int mask;
775 const CPULogItem *item;
776
777 if (optind >= argc)
778 break;
779
780 r = argv[optind++];
781 mask = cpu_str_to_log_mask(r);
782 if (!mask) {
783 printf("Log items (comma separated):\n");
784 for(item = cpu_log_items; item->mask != 0; item++) {
785 printf("%-10s %s\n", item->name, item->help);
786 }
787 exit(1);
788 }
789 cpu_set_log(mask);
790 } else if (!strcmp(r, "E")) {
791 r = argv[optind++];
792 if (envlist_setenv(envlist, r) != 0)
793 usage();
794 } else if (!strcmp(r, "U")) {
795 r = argv[optind++];
796 if (envlist_unsetenv(envlist, r) != 0)
797 usage();
798 } else if (!strcmp(r, "s")) {
799 r = argv[optind++];
800 x86_stack_size = strtol(r, (char **)&r, 0);
801 if (x86_stack_size <= 0)
802 usage();
803 if (*r == 'M')
804 x86_stack_size *= 1024 * 1024;
805 else if (*r == 'k' || *r == 'K')
806 x86_stack_size *= 1024;
807 } else if (!strcmp(r, "L")) {
808 interp_prefix = argv[optind++];
809 } else if (!strcmp(r, "p")) {
810 qemu_host_page_size = atoi(argv[optind++]);
811 if (qemu_host_page_size == 0 ||
812 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
813 fprintf(stderr, "page size must be a power of two\n");
814 exit(1);
815 }
816 } else if (!strcmp(r, "g")) {
817 gdbstub_port = atoi(argv[optind++]);
818 } else if (!strcmp(r, "r")) {
819 qemu_uname_release = argv[optind++];
820 } else if (!strcmp(r, "cpu")) {
821 cpu_model = argv[optind++];
822 if (strcmp(cpu_model, "?") == 0) {
823 /* XXX: implement xxx_cpu_list for targets that still miss it */
824 #if defined(cpu_list)
825 cpu_list(stdout, &fprintf);
826 #endif
827 exit(1);
828 }
829 #if defined(CONFIG_USE_GUEST_BASE)
830 } else if (!strcmp(r, "B")) {
831 guest_base = strtol(argv[optind++], NULL, 0);
832 have_guest_base = 1;
833 #endif
834 } else if (!strcmp(r, "drop-ld-preload")) {
835 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
836 } else if (!strcmp(r, "bsd")) {
837 if (!strcasecmp(argv[optind], "freebsd")) {
838 bsd_type = target_freebsd;
839 } else if (!strcasecmp(argv[optind], "netbsd")) {
840 bsd_type = target_netbsd;
841 } else if (!strcasecmp(argv[optind], "openbsd")) {
842 bsd_type = target_openbsd;
843 } else {
844 usage();
845 }
846 optind++;
847 } else if (!strcmp(r, "singlestep")) {
848 singlestep = 1;
849 } else if (!strcmp(r, "strace")) {
850 do_strace = 1;
851 } else
852 {
853 usage();
854 }
855 }
856 if (optind >= argc)
857 usage();
858 filename = argv[optind];
859
860 /* Zero out regs */
861 memset(regs, 0, sizeof(struct target_pt_regs));
862
863 /* Zero out image_info */
864 memset(info, 0, sizeof(struct image_info));
865
866 /* Scan interp_prefix dir for replacement files. */
867 init_paths(interp_prefix);
868
869 if (cpu_model == NULL) {
870 #if defined(TARGET_I386)
871 #ifdef TARGET_X86_64
872 cpu_model = "qemu64";
873 #else
874 cpu_model = "qemu32";
875 #endif
876 #elif defined(TARGET_SPARC)
877 #ifdef TARGET_SPARC64
878 cpu_model = "TI UltraSparc II";
879 #else
880 cpu_model = "Fujitsu MB86904";
881 #endif
882 #else
883 cpu_model = "any";
884 #endif
885 }
886 cpu_exec_init_all(0);
887 /* NOTE: we need to init the CPU at this stage to get
888 qemu_host_page_size */
889 env = cpu_init(cpu_model);
890 if (!env) {
891 fprintf(stderr, "Unable to find CPU definition\n");
892 exit(1);
893 }
894 #if defined(TARGET_I386) || defined(TARGET_SPARC) || defined(TARGET_PPC)
895 cpu_reset(env);
896 #endif
897 thread_env = env;
898
899 if (getenv("QEMU_STRACE")) {
900 do_strace = 1;
901 }
902
903 target_environ = envlist_to_environ(envlist, NULL);
904 envlist_free(envlist);
905
906 #if defined(CONFIG_USE_GUEST_BASE)
907 /*
908 * Now that page sizes are configured in cpu_init() we can do
909 * proper page alignment for guest_base.
910 */
911 guest_base = HOST_PAGE_ALIGN(guest_base);
912
913 /*
914 * Read in mmap_min_addr kernel parameter. This value is used
915 * When loading the ELF image to determine whether guest_base
916 * is needed.
917 *
918 * When user has explicitly set the quest base, we skip this
919 * test.
920 */
921 if (!have_guest_base) {
922 FILE *fp;
923
924 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
925 unsigned long tmp;
926 if (fscanf(fp, "%lu", &tmp) == 1) {
927 mmap_min_addr = tmp;
928 qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
929 }
930 fclose(fp);
931 }
932 }
933 #endif /* CONFIG_USE_GUEST_BASE */
934
935 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
936 printf("Error loading %s\n", filename);
937 _exit(1);
938 }
939
940 for (wrk = target_environ; *wrk; wrk++) {
941 free(*wrk);
942 }
943
944 free(target_environ);
945
946 if (qemu_log_enabled()) {
947 #if defined(CONFIG_USE_GUEST_BASE)
948 qemu_log("guest_base 0x%lx\n", guest_base);
949 #endif
950 log_page_dump();
951
952 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
953 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
954 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
955 info->start_code);
956 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
957 info->start_data);
958 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
959 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
960 info->start_stack);
961 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
962 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
963 }
964
965 target_set_brk(info->brk);
966 syscall_init();
967 signal_init();
968
969 /* build Task State */
970 memset(ts, 0, sizeof(TaskState));
971 init_task_state(ts);
972 ts->info = info;
973 env->opaque = ts;
974
975 #if defined(TARGET_I386)
976 cpu_x86_set_cpl(env, 3);
977
978 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
979 env->hflags |= HF_PE_MASK;
980 if (env->cpuid_features & CPUID_SSE) {
981 env->cr[4] |= CR4_OSFXSR_MASK;
982 env->hflags |= HF_OSFXSR_MASK;
983 }
984 #ifndef TARGET_ABI32
985 /* enable 64 bit mode if possible */
986 if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
987 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
988 exit(1);
989 }
990 env->cr[4] |= CR4_PAE_MASK;
991 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
992 env->hflags |= HF_LMA_MASK;
993 #endif
994
995 /* flags setup : we activate the IRQs by default as in user mode */
996 env->eflags |= IF_MASK;
997
998 /* linux register setup */
999 #ifndef TARGET_ABI32
1000 env->regs[R_EAX] = regs->rax;
1001 env->regs[R_EBX] = regs->rbx;
1002 env->regs[R_ECX] = regs->rcx;
1003 env->regs[R_EDX] = regs->rdx;
1004 env->regs[R_ESI] = regs->rsi;
1005 env->regs[R_EDI] = regs->rdi;
1006 env->regs[R_EBP] = regs->rbp;
1007 env->regs[R_ESP] = regs->rsp;
1008 env->eip = regs->rip;
1009 #else
1010 env->regs[R_EAX] = regs->eax;
1011 env->regs[R_EBX] = regs->ebx;
1012 env->regs[R_ECX] = regs->ecx;
1013 env->regs[R_EDX] = regs->edx;
1014 env->regs[R_ESI] = regs->esi;
1015 env->regs[R_EDI] = regs->edi;
1016 env->regs[R_EBP] = regs->ebp;
1017 env->regs[R_ESP] = regs->esp;
1018 env->eip = regs->eip;
1019 #endif
1020
1021 /* linux interrupt setup */
1022 #ifndef TARGET_ABI32
1023 env->idt.limit = 511;
1024 #else
1025 env->idt.limit = 255;
1026 #endif
1027 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1028 PROT_READ|PROT_WRITE,
1029 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1030 idt_table = g2h(env->idt.base);
1031 set_idt(0, 0);
1032 set_idt(1, 0);
1033 set_idt(2, 0);
1034 set_idt(3, 3);
1035 set_idt(4, 3);
1036 set_idt(5, 0);
1037 set_idt(6, 0);
1038 set_idt(7, 0);
1039 set_idt(8, 0);
1040 set_idt(9, 0);
1041 set_idt(10, 0);
1042 set_idt(11, 0);
1043 set_idt(12, 0);
1044 set_idt(13, 0);
1045 set_idt(14, 0);
1046 set_idt(15, 0);
1047 set_idt(16, 0);
1048 set_idt(17, 0);
1049 set_idt(18, 0);
1050 set_idt(19, 0);
1051 set_idt(0x80, 3);
1052
1053 /* linux segment setup */
1054 {
1055 uint64_t *gdt_table;
1056 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1057 PROT_READ|PROT_WRITE,
1058 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1059 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1060 gdt_table = g2h(env->gdt.base);
1061 #ifdef TARGET_ABI32
1062 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1063 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1064 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1065 #else
1066 /* 64 bit code segment */
1067 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1068 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1069 DESC_L_MASK |
1070 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1071 #endif
1072 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1073 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1074 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1075 }
1076
1077 cpu_x86_load_seg(env, R_CS, __USER_CS);
1078 cpu_x86_load_seg(env, R_SS, __USER_DS);
1079 #ifdef TARGET_ABI32
1080 cpu_x86_load_seg(env, R_DS, __USER_DS);
1081 cpu_x86_load_seg(env, R_ES, __USER_DS);
1082 cpu_x86_load_seg(env, R_FS, __USER_DS);
1083 cpu_x86_load_seg(env, R_GS, __USER_DS);
1084 /* This hack makes Wine work... */
1085 env->segs[R_FS].selector = 0;
1086 #else
1087 cpu_x86_load_seg(env, R_DS, 0);
1088 cpu_x86_load_seg(env, R_ES, 0);
1089 cpu_x86_load_seg(env, R_FS, 0);
1090 cpu_x86_load_seg(env, R_GS, 0);
1091 #endif
1092 #elif defined(TARGET_SPARC)
1093 {
1094 int i;
1095 env->pc = regs->pc;
1096 env->npc = regs->npc;
1097 env->y = regs->y;
1098 for(i = 0; i < 8; i++)
1099 env->gregs[i] = regs->u_regs[i];
1100 for(i = 0; i < 8; i++)
1101 env->regwptr[i] = regs->u_regs[i + 8];
1102 }
1103 #else
1104 #error unsupported target CPU
1105 #endif
1106
1107 if (gdbstub_port) {
1108 gdbserver_start (gdbstub_port);
1109 gdb_handlesig(env, 0);
1110 }
1111 cpu_loop(env);
1112 /* never exits */
1113 return 0;
1114 }
QEmu