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exec: set map length to zero when returning NULL
[qemu/kevin.git] / bsd-user / main.c
blob0bfe46cff93e723fd1f135528eb65bb35a3c8a91
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 "sysemu/tcg.h"
24 #include "qemu-version.h"
25 #include <machine/trap.h>
26
27 #include "qapi/error.h"
28 #include "qemu.h"
29 #include "qemu/config-file.h"
30 #include "qemu/error-report.h"
31 #include "qemu/path.h"
32 #include "qemu/help_option.h"
33 #include "qemu/module.h"
34 #include "cpu.h"
35 #include "exec/exec-all.h"
36 #include "tcg/tcg.h"
37 #include "qemu/timer.h"
38 #include "qemu/envlist.h"
39 #include "exec/log.h"
40 #include "trace/control.h"
41
42 int singlestep;
43 unsigned long mmap_min_addr;
44 unsigned long guest_base;
45 bool have_guest_base;
46 unsigned long reserved_va;
47
48 static const char *interp_prefix = CONFIG_QEMU_INTERP_PREFIX;
49 const char *qemu_uname_release;
50 extern char **environ;
51 enum BSDType bsd_type;
52
53 /* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
54 we allocate a bigger stack. Need a better solution, for example
55 by remapping the process stack directly at the right place */
56 unsigned long x86_stack_size = 512 * 1024;
57
58 void gemu_log(const char *fmt, ...)
59 {
60 va_list ap;
61
62 va_start(ap, fmt);
63 vfprintf(stderr, fmt, ap);
64 va_end(ap);
65 }
66
67 #if defined(TARGET_I386)
68 int cpu_get_pic_interrupt(CPUX86State *env)
69 {
70 return -1;
71 }
72 #endif
73
74 void fork_start(void)
75 {
76 }
77
78 void fork_end(int child)
79 {
80 if (child) {
81 gdbserver_fork(thread_cpu);
82 }
83 }
84
85 #ifdef TARGET_I386
86 /***********************************************************/
87 /* CPUX86 core interface */
88
89 uint64_t cpu_get_tsc(CPUX86State *env)
90 {
91 return cpu_get_host_ticks();
92 }
93
94 static void write_dt(void *ptr, unsigned long addr, unsigned long limit,
95 int flags)
96 {
97 unsigned int e1, e2;
98 uint32_t *p;
99 e1 = (addr << 16) | (limit & 0xffff);
100 e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
101 e2 |= flags;
102 p = ptr;
103 p[0] = tswap32(e1);
104 p[1] = tswap32(e2);
105 }
106
107 static uint64_t *idt_table;
108 #ifdef TARGET_X86_64
109 static void set_gate64(void *ptr, unsigned int type, unsigned int dpl,
110 uint64_t addr, unsigned int sel)
111 {
112 uint32_t *p, e1, e2;
113 e1 = (addr & 0xffff) | (sel << 16);
114 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
115 p = ptr;
116 p[0] = tswap32(e1);
117 p[1] = tswap32(e2);
118 p[2] = tswap32(addr >> 32);
119 p[3] = 0;
120 }
121 /* only dpl matters as we do only user space emulation */
122 static void set_idt(int n, unsigned int dpl)
123 {
124 set_gate64(idt_table + n * 2, 0, dpl, 0, 0);
125 }
126 #else
127 static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
128 uint32_t addr, unsigned int sel)
129 {
130 uint32_t *p, e1, e2;
131 e1 = (addr & 0xffff) | (sel << 16);
132 e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
133 p = ptr;
134 p[0] = tswap32(e1);
135 p[1] = tswap32(e2);
136 }
137
138 /* only dpl matters as we do only user space emulation */
139 static void set_idt(int n, unsigned int dpl)
140 {
141 set_gate(idt_table + n, 0, dpl, 0, 0);
142 }
143 #endif
144
145 void cpu_loop(CPUX86State *env)
146 {
147 CPUState *cs = env_cpu(env);
148 int trapnr;
149 abi_ulong pc;
150 //target_siginfo_t info;
151
152 for(;;) {
153 cpu_exec_start(cs);
154 trapnr = cpu_exec(cs);
155 cpu_exec_end(cs);
156 process_queued_cpu_work(cs);
157
158 switch(trapnr) {
159 case 0x80:
160 /* syscall from int $0x80 */
161 if (bsd_type == target_freebsd) {
162 abi_ulong params = (abi_ulong) env->regs[R_ESP] +
163 sizeof(int32_t);
164 int32_t syscall_nr = env->regs[R_EAX];
165 int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
166
167 if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
168 get_user_s32(syscall_nr, params);
169 params += sizeof(int32_t);
170 } else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
171 get_user_s32(syscall_nr, params);
172 params += sizeof(int64_t);
173 }
174 get_user_s32(arg1, params);
175 params += sizeof(int32_t);
176 get_user_s32(arg2, params);
177 params += sizeof(int32_t);
178 get_user_s32(arg3, params);
179 params += sizeof(int32_t);
180 get_user_s32(arg4, params);
181 params += sizeof(int32_t);
182 get_user_s32(arg5, params);
183 params += sizeof(int32_t);
184 get_user_s32(arg6, params);
185 params += sizeof(int32_t);
186 get_user_s32(arg7, params);
187 params += sizeof(int32_t);
188 get_user_s32(arg8, params);
189 env->regs[R_EAX] = do_freebsd_syscall(env,
190 syscall_nr,
191 arg1,
192 arg2,
193 arg3,
194 arg4,
195 arg5,
196 arg6,
197 arg7,
198 arg8);
199 } else { //if (bsd_type == target_openbsd)
200 env->regs[R_EAX] = do_openbsd_syscall(env,
201 env->regs[R_EAX],
202 env->regs[R_EBX],
203 env->regs[R_ECX],
204 env->regs[R_EDX],
205 env->regs[R_ESI],
206 env->regs[R_EDI],
207 env->regs[R_EBP]);
208 }
209 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
210 env->regs[R_EAX] = -env->regs[R_EAX];
211 env->eflags |= CC_C;
212 } else {
213 env->eflags &= ~CC_C;
214 }
215 break;
216 #ifndef TARGET_ABI32
217 case EXCP_SYSCALL:
218 /* syscall from syscall instruction */
219 if (bsd_type == target_freebsd)
220 env->regs[R_EAX] = do_freebsd_syscall(env,
221 env->regs[R_EAX],
222 env->regs[R_EDI],
223 env->regs[R_ESI],
224 env->regs[R_EDX],
225 env->regs[R_ECX],
226 env->regs[8],
227 env->regs[9], 0, 0);
228 else { //if (bsd_type == target_openbsd)
229 env->regs[R_EAX] = do_openbsd_syscall(env,
230 env->regs[R_EAX],
231 env->regs[R_EDI],
232 env->regs[R_ESI],
233 env->regs[R_EDX],
234 env->regs[10],
235 env->regs[8],
236 env->regs[9]);
237 }
238 env->eip = env->exception_next_eip;
239 if (((abi_ulong)env->regs[R_EAX]) >= (abi_ulong)(-515)) {
240 env->regs[R_EAX] = -env->regs[R_EAX];
241 env->eflags |= CC_C;
242 } else {
243 env->eflags &= ~CC_C;
244 }
245 break;
246 #endif
247 #if 0
248 case EXCP0B_NOSEG:
249 case EXCP0C_STACK:
250 info.si_signo = SIGBUS;
251 info.si_errno = 0;
252 info.si_code = TARGET_SI_KERNEL;
253 info._sifields._sigfault._addr = 0;
254 queue_signal(env, info.si_signo, &info);
255 break;
256 case EXCP0D_GPF:
257 /* XXX: potential problem if ABI32 */
258 #ifndef TARGET_X86_64
259 if (env->eflags & VM_MASK) {
260 handle_vm86_fault(env);
261 } else
262 #endif
263 {
264 info.si_signo = SIGSEGV;
265 info.si_errno = 0;
266 info.si_code = TARGET_SI_KERNEL;
267 info._sifields._sigfault._addr = 0;
268 queue_signal(env, info.si_signo, &info);
269 }
270 break;
271 case EXCP0E_PAGE:
272 info.si_signo = SIGSEGV;
273 info.si_errno = 0;
274 if (!(env->error_code & 1))
275 info.si_code = TARGET_SEGV_MAPERR;
276 else
277 info.si_code = TARGET_SEGV_ACCERR;
278 info._sifields._sigfault._addr = env->cr[2];
279 queue_signal(env, info.si_signo, &info);
280 break;
281 case EXCP00_DIVZ:
282 #ifndef TARGET_X86_64
283 if (env->eflags & VM_MASK) {
284 handle_vm86_trap(env, trapnr);
285 } else
286 #endif
287 {
288 /* division by zero */
289 info.si_signo = SIGFPE;
290 info.si_errno = 0;
291 info.si_code = TARGET_FPE_INTDIV;
292 info._sifields._sigfault._addr = env->eip;
293 queue_signal(env, info.si_signo, &info);
294 }
295 break;
296 case EXCP01_DB:
297 case EXCP03_INT3:
298 #ifndef TARGET_X86_64
299 if (env->eflags & VM_MASK) {
300 handle_vm86_trap(env, trapnr);
301 } else
302 #endif
303 {
304 info.si_signo = SIGTRAP;
305 info.si_errno = 0;
306 if (trapnr == EXCP01_DB) {
307 info.si_code = TARGET_TRAP_BRKPT;
308 info._sifields._sigfault._addr = env->eip;
309 } else {
310 info.si_code = TARGET_SI_KERNEL;
311 info._sifields._sigfault._addr = 0;
312 }
313 queue_signal(env, info.si_signo, &info);
314 }
315 break;
316 case EXCP04_INTO:
317 case EXCP05_BOUND:
318 #ifndef TARGET_X86_64
319 if (env->eflags & VM_MASK) {
320 handle_vm86_trap(env, trapnr);
321 } else
322 #endif
323 {
324 info.si_signo = SIGSEGV;
325 info.si_errno = 0;
326 info.si_code = TARGET_SI_KERNEL;
327 info._sifields._sigfault._addr = 0;
328 queue_signal(env, info.si_signo, &info);
329 }
330 break;
331 case EXCP06_ILLOP:
332 info.si_signo = SIGILL;
333 info.si_errno = 0;
334 info.si_code = TARGET_ILL_ILLOPN;
335 info._sifields._sigfault._addr = env->eip;
336 queue_signal(env, info.si_signo, &info);
337 break;
338 #endif
339 case EXCP_INTERRUPT:
340 /* just indicate that signals should be handled asap */
341 break;
342 #if 0
343 case EXCP_DEBUG:
344 {
345 int sig;
346
347 sig = gdb_handlesig (env, TARGET_SIGTRAP);
348 if (sig)
349 {
350 info.si_signo = sig;
351 info.si_errno = 0;
352 info.si_code = TARGET_TRAP_BRKPT;
353 queue_signal(env, info.si_signo, &info);
354 }
355 }
356 break;
357 #endif
358 default:
359 pc = env->segs[R_CS].base + env->eip;
360 fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
361 (long)pc, trapnr);
362 abort();
363 }
364 process_pending_signals(env);
365 }
366 }
367 #endif
368
369 #ifdef TARGET_SPARC
370 #define SPARC64_STACK_BIAS 2047
371
372 //#define DEBUG_WIN
373 /* WARNING: dealing with register windows _is_ complicated. More info
374 can be found at http://www.sics.se/~psm/sparcstack.html */
375 static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
376 {
377 index = (index + cwp * 16) % (16 * env->nwindows);
378 /* wrap handling : if cwp is on the last window, then we use the
379 registers 'after' the end */
380 if (index < 8 && env->cwp == env->nwindows - 1)
381 index += 16 * env->nwindows;
382 return index;
383 }
384
385 /* save the register window 'cwp1' */
386 static inline void save_window_offset(CPUSPARCState *env, int cwp1)
387 {
388 unsigned int i;
389 abi_ulong sp_ptr;
390
391 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
392 #ifdef TARGET_SPARC64
393 if (sp_ptr & 3)
394 sp_ptr += SPARC64_STACK_BIAS;
395 #endif
396 #if defined(DEBUG_WIN)
397 printf("win_overflow: sp_ptr=0x" TARGET_ABI_FMT_lx " save_cwp=%d\n",
398 sp_ptr, cwp1);
399 #endif
400 for(i = 0; i < 16; i++) {
401 /* FIXME - what to do if put_user() fails? */
402 put_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
403 sp_ptr += sizeof(abi_ulong);
404 }
405 }
406
407 static void save_window(CPUSPARCState *env)
408 {
409 #ifndef TARGET_SPARC64
410 unsigned int new_wim;
411 new_wim = ((env->wim >> 1) | (env->wim << (env->nwindows - 1))) &
412 ((1LL << env->nwindows) - 1);
413 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
414 env->wim = new_wim;
415 #else
416 save_window_offset(env, cpu_cwp_dec(env, env->cwp - 2));
417 env->cansave++;
418 env->canrestore--;
419 #endif
420 }
421
422 static void restore_window(CPUSPARCState *env)
423 {
424 #ifndef TARGET_SPARC64
425 unsigned int new_wim;
426 #endif
427 unsigned int i, cwp1;
428 abi_ulong sp_ptr;
429
430 #ifndef TARGET_SPARC64
431 new_wim = ((env->wim << 1) | (env->wim >> (env->nwindows - 1))) &
432 ((1LL << env->nwindows) - 1);
433 #endif
434
435 /* restore the invalid window */
436 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
437 sp_ptr = env->regbase[get_reg_index(env, cwp1, 6)];
438 #ifdef TARGET_SPARC64
439 if (sp_ptr & 3)
440 sp_ptr += SPARC64_STACK_BIAS;
441 #endif
442 #if defined(DEBUG_WIN)
443 printf("win_underflow: sp_ptr=0x" TARGET_ABI_FMT_lx " load_cwp=%d\n",
444 sp_ptr, cwp1);
445 #endif
446 for(i = 0; i < 16; i++) {
447 /* FIXME - what to do if get_user() fails? */
448 get_user_ual(env->regbase[get_reg_index(env, cwp1, 8 + i)], sp_ptr);
449 sp_ptr += sizeof(abi_ulong);
450 }
451 #ifdef TARGET_SPARC64
452 env->canrestore++;
453 if (env->cleanwin < env->nwindows - 1)
454 env->cleanwin++;
455 env->cansave--;
456 #else
457 env->wim = new_wim;
458 #endif
459 }
460
461 static void flush_windows(CPUSPARCState *env)
462 {
463 int offset, cwp1;
464
465 offset = 1;
466 for(;;) {
467 /* if restore would invoke restore_window(), then we can stop */
468 cwp1 = cpu_cwp_inc(env, env->cwp + offset);
469 #ifndef TARGET_SPARC64
470 if (env->wim & (1 << cwp1))
471 break;
472 #else
473 if (env->canrestore == 0)
474 break;
475 env->cansave++;
476 env->canrestore--;
477 #endif
478 save_window_offset(env, cwp1);
479 offset++;
480 }
481 cwp1 = cpu_cwp_inc(env, env->cwp + 1);
482 #ifndef TARGET_SPARC64
483 /* set wim so that restore will reload the registers */
484 env->wim = 1 << cwp1;
485 #endif
486 #if defined(DEBUG_WIN)
487 printf("flush_windows: nb=%d\n", offset - 1);
488 #endif
489 }
490
491 void cpu_loop(CPUSPARCState *env)
492 {
493 CPUState *cs = env_cpu(env);
494 int trapnr, ret, syscall_nr;
495 //target_siginfo_t info;
496
497 while (1) {
498 cpu_exec_start(cs);
499 trapnr = cpu_exec(cs);
500 cpu_exec_end(cs);
501 process_queued_cpu_work(cs);
502
503 switch (trapnr) {
504 #ifndef TARGET_SPARC64
505 case 0x80:
506 #else
507 /* FreeBSD uses 0x141 for syscalls too */
508 case 0x141:
509 if (bsd_type != target_freebsd)
510 goto badtrap;
511 case 0x100:
512 #endif
513 syscall_nr = env->gregs[1];
514 if (bsd_type == target_freebsd)
515 ret = do_freebsd_syscall(env, syscall_nr,
516 env->regwptr[0], env->regwptr[1],
517 env->regwptr[2], env->regwptr[3],
518 env->regwptr[4], env->regwptr[5], 0, 0);
519 else if (bsd_type == target_netbsd)
520 ret = do_netbsd_syscall(env, syscall_nr,
521 env->regwptr[0], env->regwptr[1],
522 env->regwptr[2], env->regwptr[3],
523 env->regwptr[4], env->regwptr[5]);
524 else { //if (bsd_type == target_openbsd)
525 #if defined(TARGET_SPARC64)
526 syscall_nr &= ~(TARGET_OPENBSD_SYSCALL_G7RFLAG |
527 TARGET_OPENBSD_SYSCALL_G2RFLAG);
528 #endif
529 ret = do_openbsd_syscall(env, syscall_nr,
530 env->regwptr[0], env->regwptr[1],
531 env->regwptr[2], env->regwptr[3],
532 env->regwptr[4], env->regwptr[5]);
533 }
534 if ((unsigned int)ret >= (unsigned int)(-515)) {
535 ret = -ret;
536 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
537 env->xcc |= PSR_CARRY;
538 #else
539 env->psr |= PSR_CARRY;
540 #endif
541 } else {
542 #if defined(TARGET_SPARC64) && !defined(TARGET_ABI32)
543 env->xcc &= ~PSR_CARRY;
544 #else
545 env->psr &= ~PSR_CARRY;
546 #endif
547 }
548 env->regwptr[0] = ret;
549 /* next instruction */
550 #if defined(TARGET_SPARC64)
551 if (bsd_type == target_openbsd &&
552 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G2RFLAG) {
553 env->pc = env->gregs[2];
554 env->npc = env->pc + 4;
555 } else if (bsd_type == target_openbsd &&
556 env->gregs[1] & TARGET_OPENBSD_SYSCALL_G7RFLAG) {
557 env->pc = env->gregs[7];
558 env->npc = env->pc + 4;
559 } else {
560 env->pc = env->npc;
561 env->npc = env->npc + 4;
562 }
563 #else
564 env->pc = env->npc;
565 env->npc = env->npc + 4;
566 #endif
567 break;
568 case 0x83: /* flush windows */
569 #ifdef TARGET_ABI32
570 case 0x103:
571 #endif
572 flush_windows(env);
573 /* next instruction */
574 env->pc = env->npc;
575 env->npc = env->npc + 4;
576 break;
577 #ifndef TARGET_SPARC64
578 case TT_WIN_OVF: /* window overflow */
579 save_window(env);
580 break;
581 case TT_WIN_UNF: /* window underflow */
582 restore_window(env);
583 break;
584 case TT_TFAULT:
585 case TT_DFAULT:
586 #if 0
587 {
588 info.si_signo = SIGSEGV;
589 info.si_errno = 0;
590 /* XXX: check env->error_code */
591 info.si_code = TARGET_SEGV_MAPERR;
592 info._sifields._sigfault._addr = env->mmuregs[4];
593 queue_signal(env, info.si_signo, &info);
594 }
595 #endif
596 break;
597 #else
598 case TT_SPILL: /* window overflow */
599 save_window(env);
600 break;
601 case TT_FILL: /* window underflow */
602 restore_window(env);
603 break;
604 case TT_TFAULT:
605 case TT_DFAULT:
606 #if 0
607 {
608 info.si_signo = SIGSEGV;
609 info.si_errno = 0;
610 /* XXX: check env->error_code */
611 info.si_code = TARGET_SEGV_MAPERR;
612 if (trapnr == TT_DFAULT)
613 info._sifields._sigfault._addr = env->dmmuregs[4];
614 else
615 info._sifields._sigfault._addr = env->tsptr->tpc;
616 //queue_signal(env, info.si_signo, &info);
617 }
618 #endif
619 break;
620 #endif
621 case EXCP_INTERRUPT:
622 /* just indicate that signals should be handled asap */
623 break;
624 case EXCP_DEBUG:
625 {
626 #if 0
627 int sig =
628 #endif
629 gdb_handlesig(cs, TARGET_SIGTRAP);
630 #if 0
631 if (sig)
632 {
633 info.si_signo = sig;
634 info.si_errno = 0;
635 info.si_code = TARGET_TRAP_BRKPT;
636 //queue_signal(env, info.si_signo, &info);
637 }
638 #endif
639 }
640 break;
641 default:
642 #ifdef TARGET_SPARC64
643 badtrap:
644 #endif
645 printf ("Unhandled trap: 0x%x\n", trapnr);
646 cpu_dump_state(cs, stderr, 0);
647 exit (1);
648 }
649 process_pending_signals (env);
650 }
651 }
652
653 #endif
654
655 static void usage(void)
656 {
657 printf("qemu-" TARGET_NAME " version " QEMU_FULL_VERSION
658 "\n" QEMU_COPYRIGHT "\n"
659 "usage: qemu-" TARGET_NAME " [options] program [arguments...]\n"
660 "BSD CPU emulator (compiled for %s emulation)\n"
661 "\n"
662 "Standard options:\n"
663 "-h print this help\n"
664 "-g port wait gdb connection to port\n"
665 "-L path set the elf interpreter prefix (default=%s)\n"
666 "-s size set the stack size in bytes (default=%ld)\n"
667 "-cpu model select CPU (-cpu help for list)\n"
668 "-drop-ld-preload drop LD_PRELOAD for target process\n"
669 "-E var=value sets/modifies targets environment variable(s)\n"
670 "-U var unsets targets environment variable(s)\n"
671 "-B address set guest_base address to address\n"
672 "-bsd type select emulated BSD type FreeBSD/NetBSD/OpenBSD (default)\n"
673 "\n"
674 "Debug options:\n"
675 "-d item1[,...] enable logging of specified items\n"
676 " (use '-d help' for a list of log items)\n"
677 "-D logfile write logs to 'logfile' (default stderr)\n"
678 "-p pagesize set the host page size to 'pagesize'\n"
679 "-singlestep always run in singlestep mode\n"
680 "-strace log system calls\n"
681 "-trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
682 " specify tracing options\n"
683 "\n"
684 "Environment variables:\n"
685 "QEMU_STRACE Print system calls and arguments similar to the\n"
686 " 'strace' program. Enable by setting to any value.\n"
687 "You can use -E and -U options to set/unset environment variables\n"
688 "for target process. It is possible to provide several variables\n"
689 "by repeating the option. For example:\n"
690 " -E var1=val2 -E var2=val2 -U LD_PRELOAD -U LD_DEBUG\n"
691 "Note that if you provide several changes to single variable\n"
692 "last change will stay in effect.\n"
693 "\n"
694 QEMU_HELP_BOTTOM "\n"
695 ,
696 TARGET_NAME,
697 interp_prefix,
698 x86_stack_size);
699 exit(1);
700 }
701
702 THREAD CPUState *thread_cpu;
703
704 bool qemu_cpu_is_self(CPUState *cpu)
705 {
706 return thread_cpu == cpu;
707 }
708
709 void qemu_cpu_kick(CPUState *cpu)
710 {
711 cpu_exit(cpu);
712 }
713
714 /* Assumes contents are already zeroed. */
715 void init_task_state(TaskState *ts)
716 {
717 int i;
718
719 ts->used = 1;
720 ts->first_free = ts->sigqueue_table;
721 for (i = 0; i < MAX_SIGQUEUE_SIZE - 1; i++) {
722 ts->sigqueue_table[i].next = &ts->sigqueue_table[i + 1];
723 }
724 ts->sigqueue_table[i].next = NULL;
725 }
726
727 int main(int argc, char **argv)
728 {
729 const char *filename;
730 const char *cpu_model;
731 const char *cpu_type;
732 const char *log_file = NULL;
733 const char *log_mask = NULL;
734 struct target_pt_regs regs1, *regs = &regs1;
735 struct image_info info1, *info = &info1;
736 TaskState ts1, *ts = &ts1;
737 CPUArchState *env;
738 CPUState *cpu;
739 int optind;
740 const char *r;
741 const char *gdbstub = NULL;
742 char **target_environ, **wrk;
743 envlist_t *envlist = NULL;
744 char *trace_file = NULL;
745 bsd_type = target_openbsd;
746
747 if (argc <= 1)
748 usage();
749
750 error_init(argv[0]);
751 module_call_init(MODULE_INIT_TRACE);
752 qemu_init_cpu_list();
753 module_call_init(MODULE_INIT_QOM);
754
755 envlist = envlist_create();
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
764 qemu_add_opts(&qemu_trace_opts);
765
766 optind = 1;
767 for (;;) {
768 if (optind >= argc)
769 break;
770 r = argv[optind];
771 if (r[0] != '-')
772 break;
773 optind++;
774 r++;
775 if (!strcmp(r, "-")) {
776 break;
777 } else if (!strcmp(r, "d")) {
778 if (optind >= argc) {
779 break;
780 }
781 log_mask = argv[optind++];
782 } else if (!strcmp(r, "D")) {
783 if (optind >= argc) {
784 break;
785 }
786 log_file = argv[optind++];
787 } else if (!strcmp(r, "E")) {
788 r = argv[optind++];
789 if (envlist_setenv(envlist, r) != 0)
790 usage();
791 } else if (!strcmp(r, "ignore-environment")) {
792 envlist_free(envlist);
793 envlist = envlist_create();
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 *= MiB;
805 else if (*r == 'k' || *r == 'K')
806 x86_stack_size *= KiB;
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 = g_strdup(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 (is_help_option(cpu_model)) {
823 /* XXX: implement xxx_cpu_list for targets that still miss it */
824 #if defined(cpu_list)
825 cpu_list();
826 #endif
827 exit(1);
828 }
829 } else if (!strcmp(r, "B")) {
830 guest_base = strtol(argv[optind++], NULL, 0);
831 have_guest_base = true;
832 } else if (!strcmp(r, "drop-ld-preload")) {
833 (void) envlist_unsetenv(envlist, "LD_PRELOAD");
834 } else if (!strcmp(r, "bsd")) {
835 if (!strcasecmp(argv[optind], "freebsd")) {
836 bsd_type = target_freebsd;
837 } else if (!strcasecmp(argv[optind], "netbsd")) {
838 bsd_type = target_netbsd;
839 } else if (!strcasecmp(argv[optind], "openbsd")) {
840 bsd_type = target_openbsd;
841 } else {
842 usage();
843 }
844 optind++;
845 } else if (!strcmp(r, "singlestep")) {
846 singlestep = 1;
847 } else if (!strcmp(r, "strace")) {
848 do_strace = 1;
849 } else if (!strcmp(r, "trace")) {
850 g_free(trace_file);
851 trace_file = trace_opt_parse(optarg);
852 } else {
853 usage();
854 }
855 }
856
857 /* init debug */
858 qemu_log_needs_buffers();
859 qemu_set_log_filename(log_file, &error_fatal);
860 if (log_mask) {
861 int mask;
862
863 mask = qemu_str_to_log_mask(log_mask);
864 if (!mask) {
865 qemu_print_log_usage(stdout);
866 exit(1);
867 }
868 qemu_set_log(mask);
869 }
870
871 if (optind >= argc) {
872 usage();
873 }
874 filename = argv[optind];
875
876 if (!trace_init_backends()) {
877 exit(1);
878 }
879 trace_init_file(trace_file);
880
881 /* Zero out regs */
882 memset(regs, 0, sizeof(struct target_pt_regs));
883
884 /* Zero out image_info */
885 memset(info, 0, sizeof(struct image_info));
886
887 /* Scan interp_prefix dir for replacement files. */
888 init_paths(interp_prefix);
889
890 if (cpu_model == NULL) {
891 #if defined(TARGET_I386)
892 #ifdef TARGET_X86_64
893 cpu_model = "qemu64";
894 #else
895 cpu_model = "qemu32";
896 #endif
897 #elif defined(TARGET_SPARC)
898 #ifdef TARGET_SPARC64
899 cpu_model = "TI UltraSparc II";
900 #else
901 cpu_model = "Fujitsu MB86904";
902 #endif
903 #else
904 cpu_model = "any";
905 #endif
906 }
907
908 /* init tcg before creating CPUs and to get qemu_host_page_size */
909 tcg_exec_init(0);
910
911 cpu_type = parse_cpu_option(cpu_model);
912 cpu = cpu_create(cpu_type);
913 env = cpu->env_ptr;
914 #if defined(TARGET_SPARC) || defined(TARGET_PPC)
915 cpu_reset(cpu);
916 #endif
917 thread_cpu = cpu;
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 /*
927 * Now that page sizes are configured in tcg_exec_init() we can do
928 * proper page alignment for guest_base.
929 */
930 guest_base = HOST_PAGE_ALIGN(guest_base);
931
932 /*
933 * Read in mmap_min_addr kernel parameter. This value is used
934 * When loading the ELF image to determine whether guest_base
935 * is needed.
936 *
937 * When user has explicitly set the quest base, we skip this
938 * test.
939 */
940 if (!have_guest_base) {
941 FILE *fp;
942
943 if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
944 unsigned long tmp;
945 if (fscanf(fp, "%lu", &tmp) == 1) {
946 mmap_min_addr = tmp;
947 qemu_log_mask(CPU_LOG_PAGE, "host mmap_min_addr=0x%lx\n", mmap_min_addr);
948 }
949 fclose(fp);
950 }
951 }
952
953 if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
954 printf("Error loading %s\n", filename);
955 _exit(1);
956 }
957
958 for (wrk = target_environ; *wrk; wrk++) {
959 g_free(*wrk);
960 }
961
962 g_free(target_environ);
963
964 if (qemu_loglevel_mask(CPU_LOG_PAGE)) {
965 qemu_log("guest_base 0x%lx\n", guest_base);
966 log_page_dump("binary load");
967
968 qemu_log("start_brk 0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
969 qemu_log("end_code 0x" TARGET_ABI_FMT_lx "\n", info->end_code);
970 qemu_log("start_code 0x" TARGET_ABI_FMT_lx "\n",
971 info->start_code);
972 qemu_log("start_data 0x" TARGET_ABI_FMT_lx "\n",
973 info->start_data);
974 qemu_log("end_data 0x" TARGET_ABI_FMT_lx "\n", info->end_data);
975 qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
976 info->start_stack);
977 qemu_log("brk 0x" TARGET_ABI_FMT_lx "\n", info->brk);
978 qemu_log("entry 0x" TARGET_ABI_FMT_lx "\n", info->entry);
979 }
980
981 target_set_brk(info->brk);
982 syscall_init();
983 signal_init();
984
985 /* Now that we've loaded the binary, GUEST_BASE is fixed. Delay
986 generating the prologue until now so that the prologue can take
987 the real value of GUEST_BASE into account. */
988 tcg_prologue_init(tcg_ctx);
989 tcg_region_init();
990
991 /* build Task State */
992 memset(ts, 0, sizeof(TaskState));
993 init_task_state(ts);
994 ts->info = info;
995 cpu->opaque = ts;
996
997 #if defined(TARGET_I386)
998 env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
999 env->hflags |= HF_PE_MASK | HF_CPL_MASK;
1000 if (env->features[FEAT_1_EDX] & CPUID_SSE) {
1001 env->cr[4] |= CR4_OSFXSR_MASK;
1002 env->hflags |= HF_OSFXSR_MASK;
1003 }
1004 #ifndef TARGET_ABI32
1005 /* enable 64 bit mode if possible */
1006 if (!(env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM)) {
1007 fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
1008 exit(1);
1009 }
1010 env->cr[4] |= CR4_PAE_MASK;
1011 env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
1012 env->hflags |= HF_LMA_MASK;
1013 #endif
1014
1015 /* flags setup : we activate the IRQs by default as in user mode */
1016 env->eflags |= IF_MASK;
1017
1018 /* linux register setup */
1019 #ifndef TARGET_ABI32
1020 env->regs[R_EAX] = regs->rax;
1021 env->regs[R_EBX] = regs->rbx;
1022 env->regs[R_ECX] = regs->rcx;
1023 env->regs[R_EDX] = regs->rdx;
1024 env->regs[R_ESI] = regs->rsi;
1025 env->regs[R_EDI] = regs->rdi;
1026 env->regs[R_EBP] = regs->rbp;
1027 env->regs[R_ESP] = regs->rsp;
1028 env->eip = regs->rip;
1029 #else
1030 env->regs[R_EAX] = regs->eax;
1031 env->regs[R_EBX] = regs->ebx;
1032 env->regs[R_ECX] = regs->ecx;
1033 env->regs[R_EDX] = regs->edx;
1034 env->regs[R_ESI] = regs->esi;
1035 env->regs[R_EDI] = regs->edi;
1036 env->regs[R_EBP] = regs->ebp;
1037 env->regs[R_ESP] = regs->esp;
1038 env->eip = regs->eip;
1039 #endif
1040
1041 /* linux interrupt setup */
1042 #ifndef TARGET_ABI32
1043 env->idt.limit = 511;
1044 #else
1045 env->idt.limit = 255;
1046 #endif
1047 env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1048 PROT_READ|PROT_WRITE,
1049 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1050 idt_table = g2h(env->idt.base);
1051 set_idt(0, 0);
1052 set_idt(1, 0);
1053 set_idt(2, 0);
1054 set_idt(3, 3);
1055 set_idt(4, 3);
1056 set_idt(5, 0);
1057 set_idt(6, 0);
1058 set_idt(7, 0);
1059 set_idt(8, 0);
1060 set_idt(9, 0);
1061 set_idt(10, 0);
1062 set_idt(11, 0);
1063 set_idt(12, 0);
1064 set_idt(13, 0);
1065 set_idt(14, 0);
1066 set_idt(15, 0);
1067 set_idt(16, 0);
1068 set_idt(17, 0);
1069 set_idt(18, 0);
1070 set_idt(19, 0);
1071 set_idt(0x80, 3);
1072
1073 /* linux segment setup */
1074 {
1075 uint64_t *gdt_table;
1076 env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1077 PROT_READ|PROT_WRITE,
1078 MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1079 env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1080 gdt_table = g2h(env->gdt.base);
1081 #ifdef TARGET_ABI32
1082 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1083 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1084 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1085 #else
1086 /* 64 bit code segment */
1087 write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1088 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1089 DESC_L_MASK |
1090 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1091 #endif
1092 write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1093 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1094 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1095 }
1096
1097 cpu_x86_load_seg(env, R_CS, __USER_CS);
1098 cpu_x86_load_seg(env, R_SS, __USER_DS);
1099 #ifdef TARGET_ABI32
1100 cpu_x86_load_seg(env, R_DS, __USER_DS);
1101 cpu_x86_load_seg(env, R_ES, __USER_DS);
1102 cpu_x86_load_seg(env, R_FS, __USER_DS);
1103 cpu_x86_load_seg(env, R_GS, __USER_DS);
1104 /* This hack makes Wine work... */
1105 env->segs[R_FS].selector = 0;
1106 #else
1107 cpu_x86_load_seg(env, R_DS, 0);
1108 cpu_x86_load_seg(env, R_ES, 0);
1109 cpu_x86_load_seg(env, R_FS, 0);
1110 cpu_x86_load_seg(env, R_GS, 0);
1111 #endif
1112 #elif defined(TARGET_SPARC)
1113 {
1114 int i;
1115 env->pc = regs->pc;
1116 env->npc = regs->npc;
1117 env->y = regs->y;
1118 for(i = 0; i < 8; i++)
1119 env->gregs[i] = regs->u_regs[i];
1120 for(i = 0; i < 8; i++)
1121 env->regwptr[i] = regs->u_regs[i + 8];
1122 }
1123 #else
1124 #error unsupported target CPU
1125 #endif
1126
1127 if (gdbstub) {
1128 gdbserver_start(gdbstub);
1129 gdb_handlesig(cpu, 0);
1130 }
1131 cpu_loop(env);
1132 /* never exits */
1133 return 0;
1134 }
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