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Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into staging
[qemu/ar7.git] / bsd-user / main.c
blob798aba512c1c6347bcfafa2cd428bd65c1aa3fc0
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
20 #include "qemu/osdep.h"
21 #include "qemu-common.h"
22 #include "qemu/units.h"
23 #include "qemu/accel.h"
24 #include "sysemu/tcg.h"
25 #include "qemu-version.h"
26 #include <machine/trap.h>
27
28 #include "qapi/error.h"
29 #include "qemu.h"
30 #include "qemu/config-file.h"
31 #include "qemu/error-report.h"
32 #include "qemu/path.h"
33 #include "qemu/help_option.h"
34 #include "qemu/module.h"
35 #include "cpu.h"
36 #include "exec/exec-all.h"
37 #include "tcg/tcg.h"
38 #include "qemu/timer.h"
39 #include "qemu/envlist.h"
40 #include "exec/log.h"
41 #include "trace/control.h"
42
43 int singlestep;
44 unsigned long mmap_min_addr;
45 uintptr_t guest_base;
46 bool have_guest_base;
47 unsigned long reserved_va;
48
49 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
50 const char *qemu_uname_release;
51 extern char **environ;
52 enum BSDType bsd_type;
53
54 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
55 we allocate a bigger stack. Need a better solution, for example
56 by remapping the process stack directly at the right place */
57 unsigned long x86_stack_size = 512 * 1024;
58
59 void gemu_log(const char *fmt, ...)
60 {
61 va_list ap;
62
63 va_start(ap, fmt);
64 vfprintf(stderr, fmt, ap);
65 va_end(ap);
66 }
67
68 #if defined(TARGET_I386)
69 int cpu_get_pic_interrupt(CPUX86State *env)
70 {
71 return -1;
72 }
73 #endif
74
75 void fork_start(void)
76 {
77 }
78
79 void fork_end(int child)
80 {
81 if (child) {
82 gdbserver_fork(thread_cpu);
83 }
84 }
85
86 #ifdef TARGET_I386
87 /***********************************************************/
88 /* CPUX86 core interface */
89
90 uint64_t cpu_get_tsc(CPUX86State *env)
91 {
92 return cpu_get_host_ticks();
93 }
94
95 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
96 int flags)
97 {
98 unsigned int e1, e2;
99 uint32_t *p;
100 e1 = (addr << 16) | (limit & 0xffff);
101 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
102 e2 |= flags;
103 p = ptr;
104 p[0] = tswap32(e1);
105 p[1] = tswap32(e2);
106 }
107
108 static uint64_t *idt_table;
109 #ifdef TARGET_X86_64
110 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
111 uint64_t addr, unsigned int sel)
112 {
113 uint32_t *p, e1, e2;
114 e1 = (addr & 0xffff) | (sel << 16);
115 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
116 p = ptr;
117 p[0] = tswap32(e1);
118 p[1] = tswap32(e2);
119 p[2] = tswap32(addr >> 32);
120 p[3] = 0;
121 }
122 /* only dpl matters as we do only user space emulation */
123 static void set_idt(int n, unsigned int dpl)
124 {
125 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
126 }
127 #else
128 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
129 uint32_t addr, unsigned int sel)
130 {
131 uint32_t *p, e1, e2;
132 e1 = (addr & 0xffff) | (sel << 16);
133 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
134 p = ptr;
135 p[0] = tswap32(e1);
136 p[1] = tswap32(e2);
137 }
138
139 /* only dpl matters as we do only user space emulation */
140 static void set_idt(int n, unsigned int dpl)
141 {
142 set_gate(idt_table + n, 0, dpl, 0, 0);
143 }
144 #endif
145
146 void cpu_loop(CPUX86State *env)
147 {
148 CPUState *cs = env_cpu(env);
149 int trapnr;
150 abi_ulong pc;
151 //target_siginfo_t info;
152
153 for(;;) {
154 cpu_exec_start(cs);
155 trapnr = cpu_exec(cs);
156 cpu_exec_end(cs);
157 process_queued_cpu_work(cs);
158
159 switch(trapnr) {
160 case 0x80:
161 /* syscall from int $0x80 */
162 if (bsd_type == target_freebsd) {
163 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
164 sizeof(int32_t);
165 int32_t syscall_nr = env->regs[R_EAX];
166 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
167
168 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
169 get_user_s32(syscall_nr, params);
170 params += sizeof(int32_t);
171 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
172 get_user_s32(syscall_nr, params);
173 params += sizeof(int64_t);
174 }
175 get_user_s32(arg1, params);
176 params += sizeof(int32_t);
177 get_user_s32(arg2, params);
178 params += sizeof(int32_t);
179 get_user_s32(arg3, params);
180 params += sizeof(int32_t);
181 get_user_s32(arg4, params);
182 params += sizeof(int32_t);
183 get_user_s32(arg5, params);
184 params += sizeof(int32_t);
185 get_user_s32(arg6, params);
186 params += sizeof(int32_t);
187 get_user_s32(arg7, params);
188 params += sizeof(int32_t);
189 get_user_s32(arg8, params);
190 env->regs[R_EAX] = do_freebsd_syscall(env,
191 syscall_nr,
192 arg1,
193 arg2,
194 arg3,
195 arg4,
196 arg5,
197 arg6,
198 arg7,
199 arg8);
200 } else { //if (bsd_type == target_openbsd)
201 env->regs[R_EAX] = do_openbsd_syscall(env,
202 env->regs[R_EAX],
203 env->regs[R_EBX],
204 env->regs[R_ECX],
205 env->regs[R_EDX],
206 env->regs[R_ESI],
207 env->regs[R_EDI],
208 env->regs[R_EBP]);
209 }
210 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
211 env->regs[R_EAX] = -env->regs[R_EAX];
212 env->eflags |= CC_C;
213 } else {
214 env->eflags &= ~CC_C;
215 }
216 break;
217 #ifndef TARGET_ABI32
218 case EXCP_SYSCALL:
219 /* syscall from syscall instruction */
220 if (bsd_type == target_freebsd)
221 env->regs[R_EAX] = do_freebsd_syscall(env,
222 env->regs[R_EAX],
223 env->regs[R_EDI],
224 env->regs[R_ESI],
225 env->regs[R_EDX],
226 env->regs[R_ECX],
227 env->regs[8],
228 env->regs[9], 0, 0);
229 else { //if (bsd_type == target_openbsd)
230 env->regs[R_EAX] = do_openbsd_syscall(env,
231 env->regs[R_EAX],
232 env->regs[R_EDI],
233 env->regs[R_ESI],
234 env->regs[R_EDX],
235 env->regs[10],
236 env->regs[8],
237 env->regs[9]);
238 }
239 env->eip = env->exception_next_eip;
240 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
241 env->regs[R_EAX] = -env->regs[R_EAX];
242 env->eflags |= CC_C;
243 } else {
244 env->eflags &= ~CC_C;
245 }
246 break;
247 #endif
248 #if 0
249 case EXCP0B_NOSEG:
250 case EXCP0C_STACK:
251 info.si_signo = SIGBUS;
252 info.si_errno = 0;
253 info.si_code = TARGET_SI_KERNEL;
254 info._sifields._sigfault._addr = 0;
255 queue_signal(env, info.si_signo, &info);
256 break;
257 case EXCP0D_GPF:
258 /* XXX: potential problem if ABI32 */
259 #ifndef TARGET_X86_64
260 if (env->eflags & VM_MASK) {
261 handle_vm86_fault(env);
262 } else
263 #endif
264 {
265 info.si_signo = SIGSEGV;
266 info.si_errno = 0;
267 info.si_code = TARGET_SI_KERNEL;
268 info._sifields._sigfault._addr = 0;
269 queue_signal(env, info.si_signo, &info);
270 }
271 break;
272 case EXCP0E_PAGE:
273 info.si_signo = SIGSEGV;
274 info.si_errno = 0;
275 if (!(env->error_code & 1))
276 info.si_code = TARGET_SEGV_MAPERR;
277 else
278 info.si_code = TARGET_SEGV_ACCERR;
279 info._sifields._sigfault._addr = env->cr[2];
280 queue_signal(env, info.si_signo, &info);
281 break;
282 case EXCP00_DIVZ:
283 #ifndef TARGET_X86_64
284 if (env->eflags & VM_MASK) {
285 handle_vm86_trap(env, trapnr);
286 } else
287 #endif
288 {
289 /* division by zero */
290 info.si_signo = SIGFPE;
291 info.si_errno = 0;
292 info.si_code = TARGET_FPE_INTDIV;
293 info._sifields._sigfault._addr = env->eip;
294 queue_signal(env, info.si_signo, &info);
295 }
296 break;
297 case EXCP01_DB:
298 case EXCP03_INT3:
299 #ifndef TARGET_X86_64
300 if (env->eflags & VM_MASK) {
301 handle_vm86_trap(env, trapnr);
302 } else
303 #endif
304 {
305 info.si_signo = SIGTRAP;
306 info.si_errno = 0;
307 if (trapnr == EXCP01_DB) {
308 info.si_code = TARGET_TRAP_BRKPT;
309 info._sifields._sigfault._addr = env->eip;
310 } else {
311 info.si_code = TARGET_SI_KERNEL;
312 info._sifields._sigfault._addr = 0;
313 }
314 queue_signal(env, info.si_signo, &info);
315 }
316 break;
317 case EXCP04_INTO:
318 case EXCP05_BOUND:
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 = SIGSEGV;
326 info.si_errno = 0;
327 info.si_code = TARGET_SI_KERNEL;
328 info._sifields._sigfault._addr = 0;
329 queue_signal(env, info.si_signo, &info);
330 }
331 break;
332 case EXCP06_ILLOP:
333 info.si_signo = SIGILL;
334 info.si_errno = 0;
335 info.si_code = TARGET_ILL_ILLOPN;
336 info._sifields._sigfault._addr = env->eip;
337 queue_signal(env, info.si_signo, &info);
338 break;
339 #endif
340 case EXCP_INTERRUPT:
341 /* just indicate that signals should be handled asap */
342 break;
343 #if 0
344 case EXCP_DEBUG:
345 {
346 int sig;
347
348 sig = gdb_handlesig (env, TARGET_SIGTRAP);
349 if (sig)
350 {
351 info.si_signo = sig;
352 info.si_errno = 0;
353 info.si_code = TARGET_TRAP_BRKPT;
354 queue_signal(env, info.si_signo, &info);
355 }
356 }
357 break;
358 #endif
359 default:
360 pc = env->segs[R_CS].base + env->eip;
361 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
362 (long)pc, trapnr);
363 abort();
364 }
365 process_pending_signals(env);
366 }
367 }
368 #endif
369
370 #ifdef TARGET_SPARC
371 #define SPARC64_STACK_BIAS 2047
372
373 //#define DEBUG_WIN
374 /* WARNING: dealing with register windows _is_ complicated. More info
375 can be found at http://www.sics.se/~psm/sparcstack.html */
376 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
377 {
378 index = (index + cwp * 16) % (16 * env->nwindows);
379 /* wrap handling : if cwp is on the last window, then we use the
380 registers 'after' the end */
381 if (index < 8 && env->cwp == env->nwindows - 1)
382 index += 16 * env->nwindows;
383 return index;
384 }
385
386 /* save the register window 'cwp1' */
387 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
388 {
389 unsigned int i;
390 abi_ulong sp_ptr;
391
392 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
393 #ifdef TARGET_SPARC64
394 if (sp_ptr & 3)
395 sp_ptr += SPARC64_STACK_BIAS;
396 #endif
397 #if defined(DEBUG_WIN)
398 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
399 sp_ptr, cwp1);
400 #endif
401 for(i = 0; i < 16; i++) {
402 /* FIXME - what to do if put_user() fails? */
403 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
404 sp_ptr += sizeof(abi_ulong);
405 }
406 }
407
408 static void save_window(CPUSPARCState *env)
409 {
410 #ifndef TARGET_SPARC64
411 unsigned int new_wim;
412 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
413 ((1LL << env->nwindows) - 1);
414 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
415 env->wim = new_wim;
416 #else
417 /*
418 * cansave is zero if the spill trap handler is triggered by `save` and
419 * nonzero if triggered by a `flushw`
420 */
421 save_window_offset(env, cpu_cwp_dec(env, env->cwp - env->cansave - 2));
422 env->cansave++;
423 env->canrestore--;
424 #endif
425 }
426
427 static void restore_window(CPUSPARCState *env)
428 {
429 #ifndef TARGET_SPARC64
430 unsigned int new_wim;
431 #endif
432 unsigned int i, cwp1;
433 abi_ulong sp_ptr;
434
435 #ifndef TARGET_SPARC64
436 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
437 ((1LL << env->nwindows) - 1);
438 #endif
439
440 /* restore the invalid window */
441 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
442 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
443 #ifdef TARGET_SPARC64
444 if (sp_ptr & 3)
445 sp_ptr += SPARC64_STACK_BIAS;
446 #endif
447 #if defined(DEBUG_WIN)
448 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
449 sp_ptr, cwp1);
450 #endif
451 for(i = 0; i < 16; i++) {
452 /* FIXME - what to do if get_user() fails? */
453 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
454 sp_ptr += sizeof(abi_ulong);
455 }
456 #ifdef TARGET_SPARC64
457 env->canrestore++;
458 if (env->cleanwin < env->nwindows - 1)
459 env->cleanwin++;
460 env->cansave--;
461 #else
462 env->wim = new_wim;
463 #endif
464 }
465
466 static void flush_windows(CPUSPARCState *env)
467 {
468 int offset, cwp1;
469
470 offset = 1;
471 for(;;) {
472 /* if restore would invoke restore_window(), then we can stop */
473 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
474 #ifndef TARGET_SPARC64
475 if (env->wim & (1 << cwp1))
476 break;
477 #else
478 if (env->canrestore == 0)
479 break;
480 env->cansave++;
481 env->canrestore--;
482 #endif
483 save_window_offset(env, cwp1);
484 offset++;
485 }
486 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
487 #ifndef TARGET_SPARC64
488 /* set wim so that restore will reload the registers */
489 env->wim = 1 << cwp1;
490 #endif
491 #if defined(DEBUG_WIN)
492 printf("flush_windows: nb=%d\n", offset - 1);
493 #endif
494 }
495
496 void cpu_loop(CPUSPARCState *env)
497 {
498 CPUState *cs = env_cpu(env);
499 int trapnr, ret, syscall_nr;
500 //target_siginfo_t info;
501
502 while (1) {
503 cpu_exec_start(cs);
504 trapnr = cpu_exec(cs);
505 cpu_exec_end(cs);
506 process_queued_cpu_work(cs);
507
508 switch (trapnr) {
509 #ifndef TARGET_SPARC64
510 case 0x80:
511 #else
512 /* FreeBSD uses 0x141 for syscalls too */
513 case 0x141:
514 if (bsd_type != target_freebsd)
515 goto badtrap;
516 /* fallthrough */
517 case 0x100:
518 #endif
519 syscall_nr = env->gregs[1];
520 if (bsd_type == target_freebsd)
521 ret = do_freebsd_syscall(env, syscall_nr,
522 env->regwptr[0], env->regwptr[1],
523 env->regwptr[2], env->regwptr[3],
524 env->regwptr[4], env->regwptr[5], 0, 0);
525 else if (bsd_type == target_netbsd)
526 ret = do_netbsd_syscall(env, syscall_nr,
527 env->regwptr[0], env->regwptr[1],
528 env->regwptr[2], env->regwptr[3],
529 env->regwptr[4], env->regwptr[5]);
530 else { //if (bsd_type == target_openbsd)
531 #if defined(TARGET_SPARC64)
532 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
533 TARGET_OPENBSD_SYSCALL_G2RFLAG);
534 #endif
535 ret = do_openbsd_syscall(env, syscall_nr,
536 env->regwptr[0], env->regwptr[1],
537 env->regwptr[2], env->regwptr[3],
538 env->regwptr[4], env->regwptr[5]);
539 }
540 if ((unsigned int)ret >= (unsigned int)(-515)) {
541 ret = -ret;
542 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
543 env->xcc |= PSR_CARRY;
544 #else
545 env->psr |= PSR_CARRY;
546 #endif
547 } else {
548 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
549 env->xcc &= ~PSR_CARRY;
550 #else
551 env->psr &= ~PSR_CARRY;
552 #endif
553 }
554 env->regwptr[0] = ret;
555 /* next instruction */
556 #if defined(TARGET_SPARC64)
557 if (bsd_type == target_openbsd &&
558 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
559 env->pc = env->gregs[2];
560 env->npc = env->pc + 4;
561 } else if (bsd_type == target_openbsd &&
562 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
563 env->pc = env->gregs[7];
564 env->npc = env->pc + 4;
565 } else {
566 env->pc = env->npc;
567 env->npc = env->npc + 4;
568 }
569 #else
570 env->pc = env->npc;
571 env->npc = env->npc + 4;
572 #endif
573 break;
574 case 0x83: /* flush windows */
575 #ifdef TARGET_ABI32
576 case 0x103:
577 #endif
578 flush_windows(env);
579 /* next instruction */
580 env->pc = env->npc;
581 env->npc = env->npc + 4;
582 break;
583 #ifndef TARGET_SPARC64
584 case TT_WIN_OVF: /* window overflow */
585 save_window(env);
586 break;
587 case TT_WIN_UNF: /* window underflow */
588 restore_window(env);
589 break;
590 case TT_TFAULT:
591 case TT_DFAULT:
592 #if 0
593 {
594 info.si_signo = SIGSEGV;
595 info.si_errno = 0;
596 /* XXX: check env->error_code */
597 info.si_code = TARGET_SEGV_MAPERR;
598 info._sifields._sigfault._addr = env->mmuregs[4];
599 queue_signal(env, info.si_signo, &info);
600 }
601 #endif
602 break;
603 #else
604 case TT_SPILL: /* window overflow */
605 save_window(env);
606 break;
607 case TT_FILL: /* window underflow */
608 restore_window(env);
609 break;
610 case TT_TFAULT:
611 case TT_DFAULT:
612 #if 0
613 {
614 info.si_signo = SIGSEGV;
615 info.si_errno = 0;
616 /* XXX: check env->error_code */
617 info.si_code = TARGET_SEGV_MAPERR;
618 if (trapnr == TT_DFAULT)
619 info._sifields._sigfault._addr = env->dmmuregs[4];
620 else
621 info._sifields._sigfault._addr = env->tsptr->tpc;
622 //queue_signal(env, info.si_signo, &info);
623 }
624 #endif
625 break;
626 #endif
627 case EXCP_INTERRUPT:
628 /* just indicate that signals should be handled asap */
629 break;
630 case EXCP_DEBUG:
631 {
632 #if 0
633 int sig =
634 #endif
635 gdb_handlesig(cs, TARGET_SIGTRAP);
636 #if 0
637 if (sig)
638 {
639 info.si_signo = sig;
640 info.si_errno = 0;
641 info.si_code = TARGET_TRAP_BRKPT;
642 //queue_signal(env, info.si_signo, &info);
643 }
644 #endif
645 }
646 break;
647 default:
648 #ifdef TARGET_SPARC64
649 badtrap:
650 #endif
651 printf ("Unhandled trap: 0x%x\n", trapnr);
652 cpu_dump_state(cs, stderr, 0);
653 exit (1);
654 }
655 process_pending_signals (env);
656 }
657 }
658
659 #endif
660
661 static void usage(void)
662 {
663 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
664 "\n" QEMU_COPYRIGHT "\n"
665 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
666 "BSD CPU emulator (compiled for %s emulation)\n"
667 "\n"
668 "Standard options:\n"
669 "-h print this help\n"
670 "-g port wait gdb connection to port\n"
671 "-L path set the elf interpreter prefix (default=%s)\n"
672 "-s size set the stack size in bytes (default=%ld)\n"
673 "-cpu model select CPU (-cpu help for list)\n"
674 "-drop-ld-preload drop LD_PRELOAD for target process\n"
675 "-E var=value sets/modifies targets environment variable(s)\n"
676 "-U var unsets targets environment variable(s)\n"
677 "-B address set guest_base address to address\n"
678 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
679 "\n"
680 "Debug options:\n"
681 "-d item1[,...] enable logging of specified items\n"
682 " (use '-d help' for a list of log items)\n"
683 "-D logfile write logs to 'logfile' (default stderr)\n"
684 "-p pagesize set the host page size to 'pagesize'\n"
685 "-singlestep always run in singlestep mode\n"
686 "-strace log system calls\n"
687 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
688 " specify tracing options\n"
689 "\n"
690 "Environment variables:\n"
691 "QEMU_STRACE Print system calls and arguments similar to the\n"
692 " 'strace' program. Enable by setting to any value.\n"
693 "You can use -E and -U options to set/unset environment variables\n"
694 "for target process. It is possible to provide several variables\n"
695 "by repeating the option. For example:\n"
696 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
697 "Note that if you provide several changes to single variable\n"
698 "last change will stay in effect.\n"
699 "\n"
700 QEMU_HELP_BOTTOM "\n"
701 ,
702 TARGET_NAME,
703 interp_prefix,
704 x86_stack_size);
705 exit(1);
706 }
707
708 THREAD CPUState *thread_cpu;
709
710 bool qemu_cpu_is_self(CPUState *cpu)
711 {
712 return thread_cpu == cpu;
713 }
714
715 void qemu_cpu_kick(CPUState *cpu)
716 {
717 cpu_exit(cpu);
718 }
719
720 /* Assumes contents are already zeroed. */
721 void init_task_state(TaskState *ts)
722 {
723 int i;
724
725 ts->used = 1;
726 ts->first_free = ts->sigqueue_table;
727 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
728 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
729 }
730 ts->sigqueue_table[i].next = NULL;
731 }
732
733 int main(int argc, char **argv)
734 {
735 const char *filename;
736 const char *cpu_model;
737 const char *cpu_type;
738 const char *log_file = NULL;
739 const char *log_mask = NULL;
740 struct target_pt_regs regs1, *regs = &regs1;
741 struct image_info info1, *info = &info1;
742 TaskState ts1, *ts = &ts1;
743 CPUArchState *env;
744 CPUState *cpu;
745 int optind;
746 const char *r;
747 const char *gdbstub = NULL;
748 char **target_environ, **wrk;
749 envlist_t *envlist = NULL;
750 bsd_type = target_openbsd;
751
752 if (argc <= 1)
753 usage();
754
755 error_init(argv[0]);
756 module_call_init(MODULE_INIT_TRACE);
757 qemu_init_cpu_list();
758 module_call_init(MODULE_INIT_QOM);
759
760 envlist = envlist_create();
761
762 /* add current environment into the list */
763 for (wrk = environ; *wrk != NULL; wrk++) {
764 (void) envlist_setenv(envlist, *wrk);
765 }
766
767 cpu_model = NULL;
768
769 qemu_add_opts(&qemu_trace_opts);
770
771 optind = 1;
772 for (;;) {
773 if (optind >= argc)
774 break;
775 r = argv[optind];
776 if (r[0] != '-')
777 break;
778 optind++;
779 r++;
780 if (!strcmp(r, "-")) {
781 break;
782 } else if (!strcmp(r, "d")) {
783 if (optind >= argc) {
784 break;
785 }
786 log_mask = argv[optind++];
787 } else if (!strcmp(r, "D")) {
788 if (optind >= argc) {
789 break;
790 }
791 log_file = argv[optind++];
792 } else if (!strcmp(r, "E")) {
793 r = argv[optind++];
794 if (envlist_setenv(envlist, r) != 0)
795 usage();
796 } else if (!strcmp(r, "ignore-environment")) {
797 envlist_free(envlist);
798 envlist = envlist_create();
799 } else if (!strcmp(r, "U")) {
800 r = argv[optind++];
801 if (envlist_unsetenv(envlist, r) != 0)
802 usage();
803 } else if (!strcmp(r, "s")) {
804 r = argv[optind++];
805 x86_stack_size = strtol(r, (char **)&r, 0);
806 if (x86_stack_size <= 0)
807 usage();
808 if (*r == 'M')
809 x86_stack_size *= MiB;
810 else if (*r == 'k' || *r == 'K')
811 x86_stack_size *= KiB;
812 } else if (!strcmp(r, "L")) {
813 interp_prefix = argv[optind++];
814 } else if (!strcmp(r, "p")) {
815 qemu_host_page_size = atoi(argv[optind++]);
816 if (qemu_host_page_size == 0 ||
817 (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
818 fprintf(stderr, "page size must be a power of two\n");
819 exit(1);
820 }
821 } else if (!strcmp(r, "g")) {
822 gdbstub = g_strdup(argv[optind++]);
823 } else if (!strcmp(r, "r")) {
824 qemu_uname_release = argv[optind++];
825 } else if (!strcmp(r, "cpu")) {
826 cpu_model = argv[optind++];
827 if (is_help_option(cpu_model)) {
828 /* XXX: implement xxx_cpu_list for targets that still miss it */
829 #if defined(cpu_list)
830 cpu_list();
831 #endif
832 exit(1);
833 }
834 } else if (!strcmp(r, "B")) {
835 guest_base = strtol(argv[optind++], NULL, 0);
836 have_guest_base = true;
837 } else if (!strcmp(r, "drop-ld-preload")) {
838 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
839 } else if (!strcmp(r, "bsd")) {
840 if (!strcasecmp(argv[optind], "freebsd")) {
841 bsd_type = target_freebsd;
842 } else if (!strcasecmp(argv[optind], "netbsd")) {
843 bsd_type = target_netbsd;
844 } else if (!strcasecmp(argv[optind], "openbsd")) {
845 bsd_type = target_openbsd;
846 } else {
847 usage();
848 }
849 optind++;
850 } else if (!strcmp(r, "singlestep")) {
851 singlestep = 1;
852 } else if (!strcmp(r, "strace")) {
853 do_strace = 1;
854 } else if (!strcmp(r, "trace")) {
855 trace_opt_parse(optarg);
856 } else {
857 usage();
858 }
859 }
860
861 /* init debug */
862 qemu_log_needs_buffers();
863 qemu_set_log_filename(log_file, &error_fatal);
864 if (log_mask) {
865 int mask;
866
867 mask = qemu_str_to_log_mask(log_mask);
868 if (!mask) {
869 qemu_print_log_usage(stdout);
870 exit(1);
871 }
872 qemu_set_log(mask);
873 }
874
875 if (optind >= argc) {
876 usage();
877 }
878 filename = argv[optind];
879
880 if (!trace_init_backends()) {
881 exit(1);
882 }
883 trace_init_file();
884
885 /* Zero out regs */
886 memset(regs, 0, sizeof(struct target_pt_regs));
887
888 /* Zero out image_info */
889 memset(info, 0, sizeof(struct image_info));
890
891 /* Scan interp_prefix dir for replacement files. */
892 init_paths(interp_prefix);
893
894 if (cpu_model == NULL) {
895 #if defined(TARGET_I386)
896 #ifdef TARGET_X86_64
897 cpu_model = "qemu64";
898 #else
899 cpu_model = "qemu32";
900 #endif
901 #elif defined(TARGET_SPARC)
902 #ifdef TARGET_SPARC64
903 cpu_model = "TI UltraSparc II";
904 #else
905 cpu_model = "Fujitsu MB86904";
906 #endif
907 #else
908 cpu_model = "any";
909 #endif
910 }
911
912 cpu_type = parse_cpu_option(cpu_model);
913 /* init tcg before creating CPUs and to get qemu_host_page_size */
914 {
915 AccelClass *ac = ACCEL_GET_CLASS(current_accel());
916
917 ac->init_machine(NULL);
918 accel_init_interfaces(ac);
919 }
920 cpu = cpu_create(cpu_type);
921 env = cpu->env_ptr;
922 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
923 cpu_reset(cpu);
924 #endif
925 thread_cpu = cpu;
926
927 if (getenv("QEMU_STRACE")) {
928 do_strace = 1;
929 }
930
931 target_environ = envlist_to_environ(envlist, NULL);
932 envlist_free(envlist);
933
934 /*
935 * Now that page sizes are configured in tcg_exec_init() we can do
936 * proper page alignment for guest_base.
937 */
938 guest_base = HOST_PAGE_ALIGN(guest_base);
939
940 /*
941 * Read in mmap_min_addr kernel parameter. This value is used
942 * When loading the ELF image to determine whether guest_base
943 * is needed.
944 *
945 * When user has explicitly set the quest base, we skip this
946 * test.
947 */
948 if (!have_guest_base) {
949 FILE *fp;
950
951 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
952 unsigned long tmp;
953 if (fscanf(fp, "%lu", &tmp) == 1) {
954 mmap_min_addr = tmp;
955 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
956 }
957 fclose(fp);
958 }
959 }
960
961 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
962 printf("Error loading %s\n", filename);
963 _exit(1);
964 }
965
966 for (wrk = target_environ; *wrk; wrk++) {
967 g_free(*wrk);
968 }
969
970 g_free(target_environ);
971
972 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
973 qemu_log("guest_base %p\n", (void *)guest_base);
974 log_page_dump("binary load");
975
976 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
977 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
978 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
979 info->start_code);
980 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
981 info->start_data);
982 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
983 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
984 info->start_stack);
985 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
986 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
987 }
988
989 target_set_brk(info->brk);
990 syscall_init();
991 signal_init();
992
993 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
994 generating the prologue until now so that the prologue can take
995 the real value of GUEST_BASE into account. */
996 tcg_prologue_init(tcg_ctx);
997 tcg_region_init();
998
999 /* build Task State */
1000 memset(ts, 0, sizeof(TaskState));
1001 init_task_state(ts);
1002 ts->info = info;
1003 cpu->opaque = ts;
1004
1005 #if defined(TARGET_I386)
1006 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1007 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1008 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1009 env->cr[4] |= CR4_OSFXSR_MASK;
1010 env->hflags |= HF_OSFXSR_MASK;
1011 }
1012 #ifndef TARGET_ABI32
1013 /* enable 64 bit mode if possible */
1014 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1015 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1016 exit(1);
1017 }
1018 env->cr[4] |= CR4_PAE_MASK;
1019 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1020 env->hflags |= HF_LMA_MASK;
1021 #endif
1022
1023 /* flags setup : we activate the IRQs by default as in user mode */
1024 env->eflags |= IF_MASK;
1025
1026 /* linux register setup */
1027 #ifndef TARGET_ABI32
1028 env->regs[R_EAX] = regs->rax;
1029 env->regs[R_EBX] = regs->rbx;
1030 env->regs[R_ECX] = regs->rcx;
1031 env->regs[R_EDX] = regs->rdx;
1032 env->regs[R_ESI] = regs->rsi;
1033 env->regs[R_EDI] = regs->rdi;
1034 env->regs[R_EBP] = regs->rbp;
1035 env->regs[R_ESP] = regs->rsp;
1036 env->eip = regs->rip;
1037 #else
1038 env->regs[R_EAX] = regs->eax;
1039 env->regs[R_EBX] = regs->ebx;
1040 env->regs[R_ECX] = regs->ecx;
1041 env->regs[R_EDX] = regs->edx;
1042 env->regs[R_ESI] = regs->esi;
1043 env->regs[R_EDI] = regs->edi;
1044 env->regs[R_EBP] = regs->ebp;
1045 env->regs[R_ESP] = regs->esp;
1046 env->eip = regs->eip;
1047 #endif
1048
1049 /* linux interrupt setup */
1050 #ifndef TARGET_ABI32
1051 env->idt.limit = 511;
1052 #else
1053 env->idt.limit = 255;
1054 #endif
1055 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1056 PROT_READ|PROT_WRITE,
1057 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1058 idt_table = g2h_untagged(env->idt.base);
1059 set_idt(0, 0);
1060 set_idt(1, 0);
1061 set_idt(2, 0);
1062 set_idt(3, 3);
1063 set_idt(4, 3);
1064 set_idt(5, 0);
1065 set_idt(6, 0);
1066 set_idt(7, 0);
1067 set_idt(8, 0);
1068 set_idt(9, 0);
1069 set_idt(10, 0);
1070 set_idt(11, 0);
1071 set_idt(12, 0);
1072 set_idt(13, 0);
1073 set_idt(14, 0);
1074 set_idt(15, 0);
1075 set_idt(16, 0);
1076 set_idt(17, 0);
1077 set_idt(18, 0);
1078 set_idt(19, 0);
1079 set_idt(0x80, 3);
1080
1081 /* linux segment setup */
1082 {
1083 uint64_t *gdt_table;
1084 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1085 PROT_READ|PROT_WRITE,
1086 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1087 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1088 gdt_table = g2h_untagged(env->gdt.base);
1089 #ifdef TARGET_ABI32
1090 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1091 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1092 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1093 #else
1094 /* 64 bit code segment */
1095 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1096 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1097 DESC_L_MASK |
1098 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1099 #endif
1100 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1101 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1102 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1103 }
1104
1105 cpu_x86_load_seg(env, R_CS, __USER_CS);
1106 cpu_x86_load_seg(env, R_SS, __USER_DS);
1107 #ifdef TARGET_ABI32
1108 cpu_x86_load_seg(env, R_DS, __USER_DS);
1109 cpu_x86_load_seg(env, R_ES, __USER_DS);
1110 cpu_x86_load_seg(env, R_FS, __USER_DS);
1111 cpu_x86_load_seg(env, R_GS, __USER_DS);
1112 /* This hack makes Wine work... */
1113 env->segs[R_FS].selector = 0;
1114 #else
1115 cpu_x86_load_seg(env, R_DS, 0);
1116 cpu_x86_load_seg(env, R_ES, 0);
1117 cpu_x86_load_seg(env, R_FS, 0);
1118 cpu_x86_load_seg(env, R_GS, 0);
1119 #endif
1120 #elif defined(TARGET_SPARC)
1121 {
1122 int i;
1123 env->pc = regs->pc;
1124 env->npc = regs->npc;
1125 env->y = regs->y;
1126 for(i = 0; i < 8; i++)
1127 env->gregs[i] = regs->u_regs[i];
1128 for(i = 0; i < 8; i++)
1129 env->regwptr[i] = regs->u_regs[i + 8];
1130 }
1131 #else
1132 #error unsupported target CPU
1133 #endif
1134
1135 if (gdbstub) {
1136 gdbserver_start(gdbstub);
1137 gdb_handlesig(cpu, 0);
1138 }
1139 cpu_loop(env);
1140 /* never exits */
1141 return 0;
1142 }
AR7 emulation for QEMU