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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
 *
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 *  You should have received a copy of the GNU General Public License
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 *  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
#include "qemu-timer.h"
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
#if defined(cpudef_setup)
763
    cpudef_setup(); /* parse cpu definitions in target config file (TBD) */
764
#endif
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
            int mask;
779
            const CPULogItem *item;
780

    
781
            if (optind >= argc)
782
                break;
783

    
784
            r = argv[optind++];
785
            mask = cpu_str_to_log_mask(r);
786
            if (!mask) {
787
                printf("Log items (comma separated):\n");
788
                for(item = cpu_log_items; item->mask != 0; item++) {
789
                    printf("%-10s %s\n", item->name, item->help);
790
                }
791
                exit(1);
792
            }
793
            cpu_set_log(mask);
794
        } else if (!strcmp(r, "E")) {
795
            r = argv[optind++];
796
            if (envlist_setenv(envlist, r) != 0)
797
                usage();
798
        } else if (!strcmp(r, "U")) {
799
            r = argv[optind++];
800
            if (envlist_unsetenv(envlist, r) != 0)
801
                usage();
802
        } else if (!strcmp(r, "s")) {
803
            r = argv[optind++];
804
            x86_stack_size = strtol(r, (char **)&r, 0);
805
            if (x86_stack_size <= 0)
806
                usage();
807
            if (*r == 'M')
808
                x86_stack_size *= 1024 * 1024;
809
            else if (*r == 'k' || *r == 'K')
810
                x86_stack_size *= 1024;
811
        } else if (!strcmp(r, "L")) {
812
            interp_prefix = argv[optind++];
813
        } else if (!strcmp(r, "p")) {
814
            qemu_host_page_size = atoi(argv[optind++]);
815
            if (qemu_host_page_size == 0 ||
816
                (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
817
                fprintf(stderr, "page size must be a power of two\n");
818
                exit(1);
819
            }
820
        } else if (!strcmp(r, "g")) {
821
            gdbstub_port = atoi(argv[optind++]);
822
        } else if (!strcmp(r, "r")) {
823
            qemu_uname_release = argv[optind++];
824
        } else if (!strcmp(r, "cpu")) {
825
            cpu_model = argv[optind++];
826
            if (strcmp(cpu_model, "?") == 0) {
827
/* XXX: implement xxx_cpu_list for targets that still miss it */
828
#if defined(cpu_list)
829
                    cpu_list(stdout, &fprintf);
830
#endif
831
                exit(1);
832
            }
833
#if defined(CONFIG_USE_GUEST_BASE)
834
        } else if (!strcmp(r, "B")) {
835
           guest_base = strtol(argv[optind++], NULL, 0);
836
           have_guest_base = 1;
837
#endif
838
        } else if (!strcmp(r, "drop-ld-preload")) {
839
            (void) envlist_unsetenv(envlist, "LD_PRELOAD");
840
        } else if (!strcmp(r, "bsd")) {
841
            if (!strcasecmp(argv[optind], "freebsd")) {
842
                bsd_type = target_freebsd;
843
            } else if (!strcasecmp(argv[optind], "netbsd")) {
844
                bsd_type = target_netbsd;
845
            } else if (!strcasecmp(argv[optind], "openbsd")) {
846
                bsd_type = target_openbsd;
847
            } else {
848
                usage();
849
            }
850
            optind++;
851
        } else if (!strcmp(r, "singlestep")) {
852
            singlestep = 1;
853
        } else if (!strcmp(r, "strace")) {
854
            do_strace = 1;
855
        } else
856
        {
857
            usage();
858
        }
859
    }
860
    if (optind >= argc)
861
        usage();
862
    filename = argv[optind];
863

    
864
    /* Zero out regs */
865
    memset(regs, 0, sizeof(struct target_pt_regs));
866

    
867
    /* Zero out image_info */
868
    memset(info, 0, sizeof(struct image_info));
869

    
870
    /* Scan interp_prefix dir for replacement files. */
871
    init_paths(interp_prefix);
872

    
873
    if (cpu_model == NULL) {
874
#if defined(TARGET_I386)
875
#ifdef TARGET_X86_64
876
        cpu_model = "qemu64";
877
#else
878
        cpu_model = "qemu32";
879
#endif
880
#elif defined(TARGET_SPARC)
881
#ifdef TARGET_SPARC64
882
        cpu_model = "TI UltraSparc II";
883
#else
884
        cpu_model = "Fujitsu MB86904";
885
#endif
886
#else
887
        cpu_model = "any";
888
#endif
889
    }
890
    cpu_exec_init_all(0);
891
    /* NOTE: we need to init the CPU at this stage to get
892
       qemu_host_page_size */
893
    env = cpu_init(cpu_model);
894
    if (!env) {
895
        fprintf(stderr, "Unable to find CPU definition\n");
896
        exit(1);
897
    }
898
#if defined(TARGET_I386) || defined(TARGET_SPARC) || defined(TARGET_PPC)
899
    cpu_reset(env);
900
#endif
901
    thread_env = env;
902

    
903
    if (getenv("QEMU_STRACE")) {
904
        do_strace = 1;
905
    }
906

    
907
    target_environ = envlist_to_environ(envlist, NULL);
908
    envlist_free(envlist);
909

    
910
#if defined(CONFIG_USE_GUEST_BASE)
911
    /*
912
     * Now that page sizes are configured in cpu_init() we can do
913
     * proper page alignment for guest_base.
914
     */
915
    guest_base = HOST_PAGE_ALIGN(guest_base);
916

    
917
    /*
918
     * Read in mmap_min_addr kernel parameter.  This value is used
919
     * When loading the ELF image to determine whether guest_base
920
     * is needed.
921
     *
922
     * When user has explicitly set the quest base, we skip this
923
     * test.
924
     */
925
    if (!have_guest_base) {
926
        FILE *fp;
927

    
928
        if ((fp = fopen("/proc/sys/vm/mmap_min_addr", "r")) != NULL) {
929
            unsigned long tmp;
930
            if (fscanf(fp, "%lu", &tmp) == 1) {
931
                mmap_min_addr = tmp;
932
                qemu_log("host mmap_min_addr=0x%lx\n", mmap_min_addr);
933
            }
934
            fclose(fp);
935
        }
936
    }
937
#endif /* CONFIG_USE_GUEST_BASE */
938

    
939
    if (loader_exec(filename, argv+optind, target_environ, regs, info) != 0) {
940
        printf("Error loading %s\n", filename);
941
        _exit(1);
942
    }
943

    
944
    for (wrk = target_environ; *wrk; wrk++) {
945
        free(*wrk);
946
    }
947

    
948
    free(target_environ);
949

    
950
    if (qemu_log_enabled()) {
951
#if defined(CONFIG_USE_GUEST_BASE)
952
        qemu_log("guest_base  0x%lx\n", guest_base);
953
#endif
954
        log_page_dump();
955

    
956
        qemu_log("start_brk   0x" TARGET_ABI_FMT_lx "\n", info->start_brk);
957
        qemu_log("end_code    0x" TARGET_ABI_FMT_lx "\n", info->end_code);
958
        qemu_log("start_code  0x" TARGET_ABI_FMT_lx "\n",
959
                 info->start_code);
960
        qemu_log("start_data  0x" TARGET_ABI_FMT_lx "\n",
961
                 info->start_data);
962
        qemu_log("end_data    0x" TARGET_ABI_FMT_lx "\n", info->end_data);
963
        qemu_log("start_stack 0x" TARGET_ABI_FMT_lx "\n",
964
                 info->start_stack);
965
        qemu_log("brk         0x" TARGET_ABI_FMT_lx "\n", info->brk);
966
        qemu_log("entry       0x" TARGET_ABI_FMT_lx "\n", info->entry);
967
    }
968

    
969
    target_set_brk(info->brk);
970
    syscall_init();
971
    signal_init();
972

    
973
    /* build Task State */
974
    memset(ts, 0, sizeof(TaskState));
975
    init_task_state(ts);
976
    ts->info = info;
977
    env->opaque = ts;
978

    
979
#if defined(TARGET_I386)
980
    cpu_x86_set_cpl(env, 3);
981

    
982
    env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
983
    env->hflags |= HF_PE_MASK;
984
    if (env->cpuid_features & CPUID_SSE) {
985
        env->cr[4] |= CR4_OSFXSR_MASK;
986
        env->hflags |= HF_OSFXSR_MASK;
987
    }
988
#ifndef TARGET_ABI32
989
    /* enable 64 bit mode if possible */
990
    if (!(env->cpuid_ext2_features & CPUID_EXT2_LM)) {
991
        fprintf(stderr, "The selected x86 CPU does not support 64 bit mode\n");
992
        exit(1);
993
    }
994
    env->cr[4] |= CR4_PAE_MASK;
995
    env->efer |= MSR_EFER_LMA | MSR_EFER_LME;
996
    env->hflags |= HF_LMA_MASK;
997
#endif
998

    
999
    /* flags setup : we activate the IRQs by default as in user mode */
1000
    env->eflags |= IF_MASK;
1001

    
1002
    /* linux register setup */
1003
#ifndef TARGET_ABI32
1004
    env->regs[R_EAX] = regs->rax;
1005
    env->regs[R_EBX] = regs->rbx;
1006
    env->regs[R_ECX] = regs->rcx;
1007
    env->regs[R_EDX] = regs->rdx;
1008
    env->regs[R_ESI] = regs->rsi;
1009
    env->regs[R_EDI] = regs->rdi;
1010
    env->regs[R_EBP] = regs->rbp;
1011
    env->regs[R_ESP] = regs->rsp;
1012
    env->eip = regs->rip;
1013
#else
1014
    env->regs[R_EAX] = regs->eax;
1015
    env->regs[R_EBX] = regs->ebx;
1016
    env->regs[R_ECX] = regs->ecx;
1017
    env->regs[R_EDX] = regs->edx;
1018
    env->regs[R_ESI] = regs->esi;
1019
    env->regs[R_EDI] = regs->edi;
1020
    env->regs[R_EBP] = regs->ebp;
1021
    env->regs[R_ESP] = regs->esp;
1022
    env->eip = regs->eip;
1023
#endif
1024

    
1025
    /* linux interrupt setup */
1026
#ifndef TARGET_ABI32
1027
    env->idt.limit = 511;
1028
#else
1029
    env->idt.limit = 255;
1030
#endif
1031
    env->idt.base = target_mmap(0, sizeof(uint64_t) * (env->idt.limit + 1),
1032
                                PROT_READ|PROT_WRITE,
1033
                                MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1034
    idt_table = g2h(env->idt.base);
1035
    set_idt(0, 0);
1036
    set_idt(1, 0);
1037
    set_idt(2, 0);
1038
    set_idt(3, 3);
1039
    set_idt(4, 3);
1040
    set_idt(5, 0);
1041
    set_idt(6, 0);
1042
    set_idt(7, 0);
1043
    set_idt(8, 0);
1044
    set_idt(9, 0);
1045
    set_idt(10, 0);
1046
    set_idt(11, 0);
1047
    set_idt(12, 0);
1048
    set_idt(13, 0);
1049
    set_idt(14, 0);
1050
    set_idt(15, 0);
1051
    set_idt(16, 0);
1052
    set_idt(17, 0);
1053
    set_idt(18, 0);
1054
    set_idt(19, 0);
1055
    set_idt(0x80, 3);
1056

    
1057
    /* linux segment setup */
1058
    {
1059
        uint64_t *gdt_table;
1060
        env->gdt.base = target_mmap(0, sizeof(uint64_t) * TARGET_GDT_ENTRIES,
1061
                                    PROT_READ|PROT_WRITE,
1062
                                    MAP_ANONYMOUS|MAP_PRIVATE, -1, 0);
1063
        env->gdt.limit = sizeof(uint64_t) * TARGET_GDT_ENTRIES - 1;
1064
        gdt_table = g2h(env->gdt.base);
1065
#ifdef TARGET_ABI32
1066
        write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1067
                 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1068
                 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1069
#else
1070
        /* 64 bit code segment */
1071
        write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1072
                 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1073
                 DESC_L_MASK |
1074
                 (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1075
#endif
1076
        write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1077
                 DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
1078
                 (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1079
    }
1080

    
1081
    cpu_x86_load_seg(env, R_CS, __USER_CS);
1082
    cpu_x86_load_seg(env, R_SS, __USER_DS);
1083
#ifdef TARGET_ABI32
1084
    cpu_x86_load_seg(env, R_DS, __USER_DS);
1085
    cpu_x86_load_seg(env, R_ES, __USER_DS);
1086
    cpu_x86_load_seg(env, R_FS, __USER_DS);
1087
    cpu_x86_load_seg(env, R_GS, __USER_DS);
1088
    /* This hack makes Wine work... */
1089
    env->segs[R_FS].selector = 0;
1090
#else
1091
    cpu_x86_load_seg(env, R_DS, 0);
1092
    cpu_x86_load_seg(env, R_ES, 0);
1093
    cpu_x86_load_seg(env, R_FS, 0);
1094
    cpu_x86_load_seg(env, R_GS, 0);
1095
#endif
1096
#elif defined(TARGET_SPARC)
1097
    {
1098
        int i;
1099
        env->pc = regs->pc;
1100
        env->npc = regs->npc;
1101
        env->y = regs->y;
1102
        for(i = 0; i < 8; i++)
1103
            env->gregs[i] = regs->u_regs[i];
1104
        for(i = 0; i < 8; i++)
1105
            env->regwptr[i] = regs->u_regs[i + 8];
1106
    }
1107
#else
1108
#error unsupported target CPU
1109
#endif
1110

    
1111
    if (gdbstub_port) {
1112
        gdbserver_start (gdbstub_port);
1113
        gdb_handlesig(env, 0);
1114
    }
1115
    cpu_loop(env);
1116
    /* never exits */
1117
    return 0;
1118
}