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1
/*
2
 *  qemu user main
3
 * 
4
 *  Copyright (c) 2003 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, write to the Free Software
18
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19
 */
20
#include <stdlib.h>
21
#include <stdio.h>
22
#include <stdarg.h>
23
#include <string.h>
24
#include <errno.h>
25
#include <unistd.h>
26

    
27
#include "qemu.h"
28

    
29
#define DEBUG_LOGFILE "/tmp/qemu.log"
30

    
31
#ifdef __APPLE__
32
#include <crt_externs.h>
33
# define environ  (*_NSGetEnviron())
34
#endif
35

    
36
static const char *interp_prefix = CONFIG_QEMU_PREFIX;
37

    
38
#if defined(__i386__) && !defined(CONFIG_STATIC)
39
/* Force usage of an ELF interpreter even if it is an ELF shared
40
   object ! */
41
const char interp[] __attribute__((section(".interp"))) = "/lib/ld-linux.so.2";
42
#endif
43

    
44
/* for recent libc, we add these dummy symbols which are not declared
45
   when generating a linked object (bug in ld ?) */
46
#if (__GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 3)) && !defined(CONFIG_STATIC)
47
long __preinit_array_start[0];
48
long __preinit_array_end[0];
49
long __init_array_start[0];
50
long __init_array_end[0];
51
long __fini_array_start[0];
52
long __fini_array_end[0];
53
#endif
54

    
55
/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
56
   we allocate a bigger stack. Need a better solution, for example
57
   by remapping the process stack directly at the right place */
58
unsigned long x86_stack_size = 512 * 1024;
59

    
60
void gemu_log(const char *fmt, ...)
61
{
62
    va_list ap;
63

    
64
    va_start(ap, fmt);
65
    vfprintf(stderr, fmt, ap);
66
    va_end(ap);
67
}
68

    
69
void cpu_outb(CPUState *env, int addr, int val)
70
{
71
    fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
72
}
73

    
74
void cpu_outw(CPUState *env, int addr, int val)
75
{
76
    fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
77
}
78

    
79
void cpu_outl(CPUState *env, int addr, int val)
80
{
81
    fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
82
}
83

    
84
int cpu_inb(CPUState *env, int addr)
85
{
86
    fprintf(stderr, "inb: port=0x%04x\n", addr);
87
    return 0;
88
}
89

    
90
int cpu_inw(CPUState *env, int addr)
91
{
92
    fprintf(stderr, "inw: port=0x%04x\n", addr);
93
    return 0;
94
}
95

    
96
int cpu_inl(CPUState *env, int addr)
97
{
98
    fprintf(stderr, "inl: port=0x%04x\n", addr);
99
    return 0;
100
}
101

    
102
int cpu_get_pic_interrupt(CPUState *env)
103
{
104
    return -1;
105
}
106

    
107
/* timers for rdtsc */
108

    
109
#if defined(__i386__)
110

    
111
int64_t cpu_get_real_ticks(void)
112
{
113
    int64_t val;
114
    asm volatile ("rdtsc" : "=A" (val));
115
    return val;
116
}
117

    
118
#elif defined(__x86_64__)
119

    
120
int64_t cpu_get_real_ticks(void)
121
{
122
    uint32_t low,high;
123
    int64_t val;
124
    asm volatile("rdtsc" : "=a" (low), "=d" (high));
125
    val = high;
126
    val <<= 32;
127
    val |= low;
128
    return val;
129
}
130

    
131
#else
132

    
133
static uint64_t emu_time;
134

    
135
int64_t cpu_get_real_ticks(void)
136
{
137
    return emu_time++;
138
}
139

    
140
#endif
141

    
142
#ifdef TARGET_I386
143
/***********************************************************/
144
/* CPUX86 core interface */
145

    
146
uint64_t cpu_get_tsc(CPUX86State *env)
147
{
148
    return cpu_get_real_ticks();
149
}
150

    
151
static void write_dt(void *ptr, unsigned long addr, unsigned long limit, 
152
                     int flags)
153
{
154
    unsigned int e1, e2;
155
    e1 = (addr << 16) | (limit & 0xffff);
156
    e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
157
    e2 |= flags;
158
    stl((uint8_t *)ptr, e1);
159
    stl((uint8_t *)ptr + 4, e2);
160
}
161

    
162
static void set_gate(void *ptr, unsigned int type, unsigned int dpl, 
163
                     unsigned long addr, unsigned int sel)
164
{
165
    unsigned int e1, e2;
166
    e1 = (addr & 0xffff) | (sel << 16);
167
    e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
168
    stl((uint8_t *)ptr, e1);
169
    stl((uint8_t *)ptr + 4, e2);
170
}
171

    
172
uint64_t gdt_table[6];
173
uint64_t idt_table[256];
174

    
175
/* only dpl matters as we do only user space emulation */
176
static void set_idt(int n, unsigned int dpl)
177
{
178
    set_gate(idt_table + n, 0, dpl, 0, 0);
179
}
180

    
181
void cpu_loop(CPUX86State *env)
182
{
183
    int trapnr;
184
    target_ulong pc;
185
    target_siginfo_t info;
186

    
187
    for(;;) {
188
        trapnr = cpu_x86_exec(env);
189
        switch(trapnr) {
190
        case 0x80:
191
            /* linux syscall */
192
            env->regs[R_EAX] = do_syscall(env, 
193
                                          env->regs[R_EAX], 
194
                                          env->regs[R_EBX],
195
                                          env->regs[R_ECX],
196
                                          env->regs[R_EDX],
197
                                          env->regs[R_ESI],
198
                                          env->regs[R_EDI],
199
                                          env->regs[R_EBP]);
200
            break;
201
        case EXCP0B_NOSEG:
202
        case EXCP0C_STACK:
203
            info.si_signo = SIGBUS;
204
            info.si_errno = 0;
205
            info.si_code = TARGET_SI_KERNEL;
206
            info._sifields._sigfault._addr = 0;
207
            queue_signal(info.si_signo, &info);
208
            break;
209
        case EXCP0D_GPF:
210
            if (env->eflags & VM_MASK) {
211
                handle_vm86_fault(env);
212
            } else {
213
                info.si_signo = SIGSEGV;
214
                info.si_errno = 0;
215
                info.si_code = TARGET_SI_KERNEL;
216
                info._sifields._sigfault._addr = 0;
217
                queue_signal(info.si_signo, &info);
218
            }
219
            break;
220
        case EXCP0E_PAGE:
221
            info.si_signo = SIGSEGV;
222
            info.si_errno = 0;
223
            if (!(env->error_code & 1))
224
                info.si_code = TARGET_SEGV_MAPERR;
225
            else
226
                info.si_code = TARGET_SEGV_ACCERR;
227
            info._sifields._sigfault._addr = env->cr[2];
228
            queue_signal(info.si_signo, &info);
229
            break;
230
        case EXCP00_DIVZ:
231
            if (env->eflags & VM_MASK) {
232
                handle_vm86_trap(env, trapnr);
233
            } else {
234
                /* division by zero */
235
                info.si_signo = SIGFPE;
236
                info.si_errno = 0;
237
                info.si_code = TARGET_FPE_INTDIV;
238
                info._sifields._sigfault._addr = env->eip;
239
                queue_signal(info.si_signo, &info);
240
            }
241
            break;
242
        case EXCP01_SSTP:
243
        case EXCP03_INT3:
244
            if (env->eflags & VM_MASK) {
245
                handle_vm86_trap(env, trapnr);
246
            } else {
247
                info.si_signo = SIGTRAP;
248
                info.si_errno = 0;
249
                if (trapnr == EXCP01_SSTP) {
250
                    info.si_code = TARGET_TRAP_BRKPT;
251
                    info._sifields._sigfault._addr = env->eip;
252
                } else {
253
                    info.si_code = TARGET_SI_KERNEL;
254
                    info._sifields._sigfault._addr = 0;
255
                }
256
                queue_signal(info.si_signo, &info);
257
            }
258
            break;
259
        case EXCP04_INTO:
260
        case EXCP05_BOUND:
261
            if (env->eflags & VM_MASK) {
262
                handle_vm86_trap(env, trapnr);
263
            } else {
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(info.si_signo, &info);
269
            }
270
            break;
271
        case EXCP06_ILLOP:
272
            info.si_signo = SIGILL;
273
            info.si_errno = 0;
274
            info.si_code = TARGET_ILL_ILLOPN;
275
            info._sifields._sigfault._addr = env->eip;
276
            queue_signal(info.si_signo, &info);
277
            break;
278
        case EXCP_INTERRUPT:
279
            /* just indicate that signals should be handled asap */
280
            break;
281
        default:
282
            pc = env->segs[R_CS].base + env->eip;
283
            fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n", 
284
                    (long)pc, trapnr);
285
            abort();
286
        }
287
        process_pending_signals(env);
288
    }
289
}
290
#endif
291

    
292
#ifdef TARGET_ARM
293

    
294
/* XXX: find a better solution */
295
extern void tb_invalidate_page_range(target_ulong start, target_ulong end);
296

    
297
static void arm_cache_flush(target_ulong start, target_ulong last)
298
{
299
    target_ulong addr, last1;
300

    
301
    if (last < start)
302
        return;
303
    addr = start;
304
    for(;;) {
305
        last1 = ((addr + TARGET_PAGE_SIZE) & TARGET_PAGE_MASK) - 1;
306
        if (last1 > last)
307
            last1 = last;
308
        tb_invalidate_page_range(addr, last1 + 1);
309
        if (last1 == last)
310
            break;
311
        addr = last1 + 1;
312
    }
313
}
314

    
315
void cpu_loop(CPUARMState *env)
316
{
317
    int trapnr;
318
    unsigned int n, insn;
319
    target_siginfo_t info;
320
    
321
    for(;;) {
322
        trapnr = cpu_arm_exec(env);
323
        switch(trapnr) {
324
        case EXCP_UDEF:
325
            {
326
                TaskState *ts = env->opaque;
327
                uint32_t opcode;
328

    
329
                /* we handle the FPU emulation here, as Linux */
330
                /* we get the opcode */
331
                opcode = ldl_raw((uint8_t *)env->regs[15]);
332
                
333
                if (EmulateAll(opcode, &ts->fpa, env->regs) == 0) {
334
                    info.si_signo = SIGILL;
335
                    info.si_errno = 0;
336
                    info.si_code = TARGET_ILL_ILLOPN;
337
                    info._sifields._sigfault._addr = env->regs[15];
338
                    queue_signal(info.si_signo, &info);
339
                } else {
340
                    /* increment PC */
341
                    env->regs[15] += 4;
342
                }
343
            }
344
            break;
345
        case EXCP_SWI:
346
            {
347
                /* system call */
348
                insn = ldl((void *)(env->regs[15] - 4));
349
                n = insn & 0xffffff;
350
                if (n == ARM_NR_cacheflush) {
351
                    arm_cache_flush(env->regs[0], env->regs[1]);
352
                } else if (n >= ARM_SYSCALL_BASE) {
353
                    /* linux syscall */
354
                    n -= ARM_SYSCALL_BASE;
355
                    env->regs[0] = do_syscall(env, 
356
                                              n, 
357
                                              env->regs[0],
358
                                              env->regs[1],
359
                                              env->regs[2],
360
                                              env->regs[3],
361
                                              env->regs[4],
362
                                              0);
363
                } else {
364
                    goto error;
365
                }
366
            }
367
            break;
368
        case EXCP_INTERRUPT:
369
            /* just indicate that signals should be handled asap */
370
            break;
371
        default:
372
        error:
373
            fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", 
374
                    trapnr);
375
            cpu_dump_state(env, stderr, fprintf, 0);
376
            abort();
377
        }
378
        process_pending_signals(env);
379
    }
380
}
381

    
382
#endif
383

    
384
#ifdef TARGET_SPARC
385

    
386
//#define DEBUG_WIN
387

    
388
/* WARNING: dealing with register windows _is_ complicated */
389
static inline int get_reg_index(CPUSPARCState *env, int cwp, int index)
390
{
391
    index = (index + cwp * 16) & (16 * NWINDOWS - 1);
392
    /* wrap handling : if cwp is on the last window, then we use the
393
       registers 'after' the end */
394
    if (index < 8 && env->cwp == (NWINDOWS - 1))
395
        index += (16 * NWINDOWS);
396
    return index;
397
}
398

    
399
static inline void save_window_offset(CPUSPARCState *env, int offset)
400
{
401
    unsigned int new_wim, i, cwp1;
402
    uint32_t *sp_ptr;
403
    
404
    new_wim = ((env->wim >> 1) | (env->wim << (NWINDOWS - 1))) &
405
        ((1LL << NWINDOWS) - 1);
406
    /* save the window */
407
    cwp1 = (env->cwp + offset) & (NWINDOWS - 1);
408
    sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
409
#if defined(DEBUG_WIN)
410
    printf("win_overflow: sp_ptr=0x%x save_cwp=%d\n", 
411
           (int)sp_ptr, cwp1);
412
#endif
413
    for(i = 0; i < 16; i++)
414
        stl_raw(sp_ptr + i, env->regbase[get_reg_index(env, cwp1, 8 + i)]);
415
    env->wim = new_wim;
416
}
417

    
418
static void save_window(CPUSPARCState *env)
419
{
420
    save_window_offset(env, 2);
421
}
422

    
423
static void restore_window(CPUSPARCState *env)
424
{
425
    unsigned int new_wim, i, cwp1;
426
    uint32_t *sp_ptr;
427
    
428
    new_wim = ((env->wim << 1) | (env->wim >> (NWINDOWS - 1))) &
429
        ((1LL << NWINDOWS) - 1);
430
    
431
    /* restore the invalid window */
432
    cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
433
    sp_ptr = (uint32_t *)(env->regbase[get_reg_index(env, cwp1, 6)]);
434
#if defined(DEBUG_WIN)
435
    printf("win_underflow: sp_ptr=0x%x load_cwp=%d\n", 
436
           (int)sp_ptr, cwp1);
437
#endif
438
    for(i = 0; i < 16; i++)
439
        env->regbase[get_reg_index(env, cwp1, 8 + i)] = ldl_raw(sp_ptr + i);
440
    env->wim = new_wim;
441
}
442

    
443
#if 0
444
static void flush_windows(CPUSPARCState *env)
445
{
446
    int offset, cwp1;
447
#if defined(DEBUG_WIN)
448
    printf("flush_windows:\n");
449
#endif
450
    offset = 2;
451
    for(;;) {
452
        /* if restore would invoke restore_window(), then we can stop */
453
        cwp1 = (env->cwp + 1) & (NWINDOWS - 1);
454
        if (env->wim & (1 << cwp1))
455
            break;
456
#if defined(DEBUG_WIN)
457
        printf("offset=%d: ", offset);
458
#endif
459
        save_window_offset(env, offset);
460
        offset++;
461
    }
462
}
463
#endif
464

    
465
void cpu_loop (CPUSPARCState *env)
466
{
467
    int trapnr, ret;
468
    
469
    while (1) {
470
        trapnr = cpu_sparc_exec (env);
471
        
472
        switch (trapnr) {
473
        case 0x88: 
474
        case 0x90:
475
            ret = do_syscall (env, env->gregs[1],
476
                              env->regwptr[0], env->regwptr[1], 
477
                              env->regwptr[2], env->regwptr[3], 
478
                              env->regwptr[4], env->regwptr[5]);
479
            if ((unsigned int)ret >= (unsigned int)(-515)) {
480
                env->psr |= PSR_CARRY;
481
                ret = -ret;
482
            } else {
483
                env->psr &= ~PSR_CARRY;
484
            }
485
            env->regwptr[0] = ret;
486
            /* next instruction */
487
            env->pc = env->npc;
488
            env->npc = env->npc + 4;
489
            break;
490
        case 0x83: /* flush windows */
491
            //            flush_windows(env);
492
            /* next instruction */
493
            env->pc = env->npc;
494
            env->npc = env->npc + 4;
495
            break;
496
        case TT_WIN_OVF: /* window overflow */
497
            save_window(env);
498
            break;
499
        case TT_WIN_UNF: /* window underflow */
500
            restore_window(env);
501
            break;
502
        case 0x100: // XXX, why do we get these?
503
            break;
504
        default:
505
            printf ("Unhandled trap: 0x%x\n", trapnr);
506
            cpu_dump_state(env, stderr, fprintf, 0);
507
            exit (1);
508
        }
509
        process_pending_signals (env);
510
    }
511
}
512

    
513
#endif
514

    
515
#ifdef TARGET_PPC
516

    
517
static inline uint64_t cpu_ppc_get_tb (CPUState *env)
518
{
519
    /* TO FIX */
520
    return 0;
521
}
522
  
523
uint32_t cpu_ppc_load_tbl (CPUState *env)
524
{
525
    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
526
}
527
  
528
uint32_t cpu_ppc_load_tbu (CPUState *env)
529
{
530
    return cpu_ppc_get_tb(env) >> 32;
531
}
532
  
533
static void cpu_ppc_store_tb (CPUState *env, uint64_t value)
534
{
535
    /* TO FIX */
536
}
537

    
538
void cpu_ppc_store_tbu (CPUState *env, uint32_t value)
539
{
540
    cpu_ppc_store_tb(env, ((uint64_t)value << 32) | cpu_ppc_load_tbl(env));
541
}
542
 
543
void cpu_ppc_store_tbl (CPUState *env, uint32_t value)
544
{
545
    cpu_ppc_store_tb(env, ((uint64_t)cpu_ppc_load_tbl(env) << 32) | value);
546
}
547
  
548
uint32_t cpu_ppc_load_decr (CPUState *env)
549
{
550
    /* TO FIX */
551
    return -1;
552
}
553
 
554
void cpu_ppc_store_decr (CPUState *env, uint32_t value)
555
{
556
    /* TO FIX */
557
}
558
 
559
void cpu_loop(CPUPPCState *env)
560
{
561
    target_siginfo_t info;
562
    int trapnr;
563
    uint32_t ret;
564
    
565
    for(;;) {
566
        trapnr = cpu_ppc_exec(env);
567
        if (trapnr != EXCP_SYSCALL_USER && trapnr != EXCP_BRANCH &&
568
            trapnr != EXCP_TRACE) {
569
            if (loglevel > 0) {
570
                cpu_dump_state(env, logfile, fprintf, 0);
571
            }
572
        }
573
        switch(trapnr) {
574
        case EXCP_NONE:
575
            break;
576
        case EXCP_SYSCALL_USER:
577
            /* system call */
578
            /* WARNING:
579
             * PPC ABI uses overflow flag in cr0 to signal an error
580
             * in syscalls.
581
             */
582
#if 0
583
            printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n", env->gpr[0],
584
                   env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
585
#endif
586
            env->crf[0] &= ~0x1;
587
            ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
588
                             env->gpr[5], env->gpr[6], env->gpr[7],
589
                             env->gpr[8]);
590
            if (ret > (uint32_t)(-515)) {
591
                env->crf[0] |= 0x1;
592
                ret = -ret;
593
            }
594
            env->gpr[3] = ret;
595
#if 0
596
            printf("syscall returned 0x%08x (%d)\n", ret, ret);
597
#endif
598
            break;
599
        case EXCP_RESET:
600
            /* Should not happen ! */
601
            fprintf(stderr, "RESET asked... Stop emulation\n");
602
            if (loglevel)
603
                fprintf(logfile, "RESET asked... Stop emulation\n");
604
            abort();
605
        case EXCP_MACHINE_CHECK:
606
            fprintf(stderr, "Machine check exeption...  Stop emulation\n");
607
            if (loglevel)
608
                fprintf(logfile, "RESET asked... Stop emulation\n");
609
            info.si_signo = TARGET_SIGBUS;
610
            info.si_errno = 0;
611
            info.si_code = TARGET_BUS_OBJERR;
612
            info._sifields._sigfault._addr = env->nip - 4;
613
            queue_signal(info.si_signo, &info);
614
        case EXCP_DSI:
615
            fprintf(stderr, "Invalid data memory access: 0x%08x\n", env->spr[DAR]);
616
            if (loglevel) {
617
                fprintf(logfile, "Invalid data memory access: 0x%08x\n",
618
                        env->spr[DAR]);
619
            }
620
            switch (env->error_code & 0xF) {
621
            case EXCP_DSI_TRANSLATE:
622
                info.si_signo = TARGET_SIGSEGV;
623
                info.si_errno = 0;
624
                info.si_code = TARGET_SEGV_MAPERR;
625
                break;
626
            case EXCP_DSI_NOTSUP:
627
            case EXCP_DSI_EXTERNAL:
628
                info.si_signo = TARGET_SIGILL;
629
                info.si_errno = 0;
630
                info.si_code = TARGET_ILL_ILLADR;
631
                break;
632
            case EXCP_DSI_PROT: 
633
                info.si_signo = TARGET_SIGSEGV;
634
                info.si_errno = 0;
635
                info.si_code = TARGET_SEGV_ACCERR;
636
                break;
637
            case EXCP_DSI_DABR:
638
                info.si_signo = TARGET_SIGTRAP;
639
                info.si_errno = 0;
640
                info.si_code = TARGET_TRAP_BRKPT;
641
                break;
642
            default:
643
                /* Let's send a regular segfault... */
644
                fprintf(stderr, "Invalid segfault errno (%02x)\n",
645
                        env->error_code);
646
                if (loglevel) {
647
                    fprintf(logfile, "Invalid segfault errno (%02x)\n",
648
                            env->error_code);
649
                }
650
                info.si_signo = TARGET_SIGSEGV;
651
                info.si_errno = 0;
652
                info.si_code = TARGET_SEGV_MAPERR;
653
                break;
654
            }
655
            info._sifields._sigfault._addr = env->nip;
656
            queue_signal(info.si_signo, &info);
657
            break;
658
        case EXCP_ISI:
659
            fprintf(stderr, "Invalid instruction fetch\n");
660
            if (loglevel)
661
                fprintf(logfile, "Invalid instruction fetch\n");
662
            switch (env->error_code) {
663
            case EXCP_ISI_TRANSLATE:
664
                info.si_signo = TARGET_SIGSEGV;
665
            info.si_errno = 0;
666
                info.si_code = TARGET_SEGV_MAPERR;
667
                break;
668
            case EXCP_ISI_GUARD:
669
                info.si_signo = TARGET_SIGILL;
670
                info.si_errno = 0;
671
                info.si_code = TARGET_ILL_ILLADR;
672
                break;
673
            case EXCP_ISI_NOEXEC:
674
            case EXCP_ISI_PROT:
675
                info.si_signo = TARGET_SIGSEGV;
676
                info.si_errno = 0;
677
                info.si_code = TARGET_SEGV_ACCERR;
678
                break;
679
            default:
680
                /* Let's send a regular segfault... */
681
                fprintf(stderr, "Invalid segfault errno (%02x)\n",
682
                        env->error_code);
683
                if (loglevel) {
684
                    fprintf(logfile, "Invalid segfault errno (%02x)\n",
685
                            env->error_code);
686
                }
687
                info.si_signo = TARGET_SIGSEGV;
688
                info.si_errno = 0;
689
                info.si_code = TARGET_SEGV_MAPERR;
690
                break;
691
            }
692
            info._sifields._sigfault._addr = env->nip - 4;
693
            queue_signal(info.si_signo, &info);
694
            break;
695
        case EXCP_EXTERNAL:
696
            /* Should not happen ! */
697
            fprintf(stderr, "External interruption... Stop emulation\n");
698
            if (loglevel)
699
                fprintf(logfile, "External interruption... Stop emulation\n");
700
            abort();
701
        case EXCP_ALIGN:
702
            fprintf(stderr, "Invalid unaligned memory access\n");
703
            if (loglevel)
704
                fprintf(logfile, "Invalid unaligned memory access\n");
705
            info.si_signo = TARGET_SIGBUS;
706
            info.si_errno = 0;
707
            info.si_code = TARGET_BUS_ADRALN;
708
            info._sifields._sigfault._addr = env->nip - 4;
709
            queue_signal(info.si_signo, &info);
710
            break;
711
        case EXCP_PROGRAM:
712
            switch (env->error_code & ~0xF) {
713
            case EXCP_FP:
714
            fprintf(stderr, "Program exception\n");
715
                if (loglevel)
716
                    fprintf(logfile, "Program exception\n");
717
                /* Set FX */
718
                env->fpscr[7] |= 0x8;
719
                /* Finally, update FEX */
720
                if ((((env->fpscr[7] & 0x3) << 3) | (env->fpscr[6] >> 1)) &
721
                    ((env->fpscr[1] << 1) | (env->fpscr[0] >> 3)))
722
                    env->fpscr[7] |= 0x4;
723
                info.si_signo = TARGET_SIGFPE;
724
                info.si_errno = 0;
725
                switch (env->error_code & 0xF) {
726
                case EXCP_FP_OX:
727
                    info.si_code = TARGET_FPE_FLTOVF;
728
                    break;
729
                case EXCP_FP_UX:
730
                    info.si_code = TARGET_FPE_FLTUND;
731
                    break;
732
                case EXCP_FP_ZX:
733
                case EXCP_FP_VXZDZ:
734
                    info.si_code = TARGET_FPE_FLTDIV;
735
                    break;
736
                case EXCP_FP_XX:
737
                    info.si_code = TARGET_FPE_FLTRES;
738
                    break;
739
                case EXCP_FP_VXSOFT:
740
                    info.si_code = TARGET_FPE_FLTINV;
741
                    break;
742
                case EXCP_FP_VXNAN:
743
                case EXCP_FP_VXISI:
744
                case EXCP_FP_VXIDI:
745
                case EXCP_FP_VXIMZ:
746
                case EXCP_FP_VXVC:
747
                case EXCP_FP_VXSQRT:
748
                case EXCP_FP_VXCVI:
749
                    info.si_code = TARGET_FPE_FLTSUB;
750
                    break;
751
                default:
752
                    fprintf(stderr, "Unknown floating point exception "
753
                            "(%02x)\n", env->error_code);
754
                    if (loglevel) {
755
                        fprintf(logfile, "Unknown floating point exception "
756
                                "(%02x)\n", env->error_code & 0xF);
757
                    }
758
                }
759
            break;
760
        case EXCP_INVAL:
761
                fprintf(stderr, "Invalid instruction\n");
762
                if (loglevel)
763
                    fprintf(logfile, "Invalid instruction\n");
764
                info.si_signo = TARGET_SIGILL;
765
                info.si_errno = 0;
766
                switch (env->error_code & 0xF) {
767
                case EXCP_INVAL_INVAL:
768
                    info.si_code = TARGET_ILL_ILLOPC;
769
                    break;
770
                case EXCP_INVAL_LSWX:
771
            info.si_code = TARGET_ILL_ILLOPN;
772
                    break;
773
                case EXCP_INVAL_SPR:
774
                    info.si_code = TARGET_ILL_PRVREG;
775
                    break;
776
                case EXCP_INVAL_FP:
777
                    info.si_code = TARGET_ILL_COPROC;
778
                    break;
779
                default:
780
                    fprintf(stderr, "Unknown invalid operation (%02x)\n",
781
                            env->error_code & 0xF);
782
                    if (loglevel) {
783
                        fprintf(logfile, "Unknown invalid operation (%02x)\n",
784
                                env->error_code & 0xF);
785
                    }
786
                    info.si_code = TARGET_ILL_ILLADR;
787
                    break;
788
                }
789
                break;
790
            case EXCP_PRIV:
791
                fprintf(stderr, "Privilege violation\n");
792
                if (loglevel)
793
                    fprintf(logfile, "Privilege violation\n");
794
                info.si_signo = TARGET_SIGILL;
795
                info.si_errno = 0;
796
                switch (env->error_code & 0xF) {
797
                case EXCP_PRIV_OPC:
798
                    info.si_code = TARGET_ILL_PRVOPC;
799
                    break;
800
                case EXCP_PRIV_REG:
801
                    info.si_code = TARGET_ILL_PRVREG;
802
                break;
803
                default:
804
                    fprintf(stderr, "Unknown privilege violation (%02x)\n",
805
                            env->error_code & 0xF);
806
                    info.si_code = TARGET_ILL_PRVOPC;
807
                    break;
808
                }
809
                break;
810
            case EXCP_TRAP:
811
                fprintf(stderr, "Tried to call a TRAP\n");
812
                if (loglevel)
813
                    fprintf(logfile, "Tried to call a TRAP\n");
814
                abort();
815
            default:
816
                /* Should not happen ! */
817
                fprintf(stderr, "Unknown program exception (%02x)\n",
818
                        env->error_code);
819
                if (loglevel) {
820
                    fprintf(logfile, "Unknwon program exception (%02x)\n",
821
                            env->error_code);
822
                }
823
                abort();
824
            }
825
            info._sifields._sigfault._addr = env->nip - 4;
826
            queue_signal(info.si_signo, &info);
827
            break;
828
        case EXCP_NO_FP:
829
            fprintf(stderr, "No floating point allowed\n");
830
            if (loglevel)
831
                fprintf(logfile, "No floating point allowed\n");
832
            info.si_signo = TARGET_SIGILL;
833
            info.si_errno = 0;
834
            info.si_code = TARGET_ILL_COPROC;
835
            info._sifields._sigfault._addr = env->nip - 4;
836
            queue_signal(info.si_signo, &info);
837
            break;
838
        case EXCP_DECR:
839
            /* Should not happen ! */
840
            fprintf(stderr, "Decrementer exception\n");
841
            if (loglevel)
842
                fprintf(logfile, "Decrementer exception\n");
843
            abort();
844
        case EXCP_RESA: /* Implementation specific          */
845
            /* Should not happen ! */
846
            fprintf(stderr, "RESA exception should never happen !\n");
847
            if (loglevel)
848
                fprintf(logfile, "RESA exception should never happen !\n");
849
            abort();
850
        case EXCP_RESB: /* Implementation specific          */
851
            /* Should not happen ! */
852
            fprintf(stderr, "RESB exception should never happen !\n");
853
            if (loglevel)
854
                fprintf(logfile, "RESB exception should never happen !\n");
855
            abort();
856
        case EXCP_TRACE:
857
            /* Do nothing: we use this to trace execution */
858
            break;
859
        case EXCP_FP_ASSIST:
860
            /* Should not happen ! */
861
            fprintf(stderr, "Floating point assist exception\n");
862
            if (loglevel)
863
                fprintf(logfile, "Floating point assist exception\n");
864
            abort();
865
        case EXCP_MTMSR:
866
            /* We reloaded the msr, just go on */
867
            if (msr_pr == 0) {
868
                fprintf(stderr, "Tried to go into supervisor mode !\n");
869
                if (loglevel)
870
                    fprintf(logfile, "Tried to go into supervisor mode !\n");
871
                abort();
872
        }
873
            break;
874
        case EXCP_BRANCH:
875
            /* We stopped because of a jump... */
876
            break;
877
        case EXCP_RFI:
878
            /* Should not occur: we always are in user mode */
879
            fprintf(stderr, "Return from interrupt ?\n");
880
            if (loglevel)
881
                fprintf(logfile, "Return from interrupt ?\n");
882
            abort();
883
        case EXCP_INTERRUPT:
884
            /* Don't know why this should ever happen... */
885
            break;
886
        case EXCP_DEBUG:
887
            break;
888
        default:
889
            fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n", 
890
                    trapnr);
891
            if (loglevel) {
892
                fprintf(logfile, "qemu: unhandled CPU exception 0x%02x - "
893
                        "0x%02x - aborting\n", trapnr, env->error_code);
894
            }
895
            abort();
896
        }
897
        process_pending_signals(env);
898
    }
899
}
900
#endif
901

    
902
void usage(void)
903
{
904
    printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
905
           "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
906
           "Linux CPU emulator (compiled for %s emulation)\n"
907
           "\n"
908
           "-h           print this help\n"
909
           "-L path      set the elf interpreter prefix (default=%s)\n"
910
           "-s size      set the stack size in bytes (default=%ld)\n"
911
           "\n"
912
           "debug options:\n"
913
#ifdef USE_CODE_COPY
914
           "-no-code-copy   disable code copy acceleration\n"
915
#endif
916
           "-d options   activate log (logfile=%s)\n"
917
           "-p pagesize  set the host page size to 'pagesize'\n",
918
           TARGET_ARCH,
919
           interp_prefix, 
920
           x86_stack_size,
921
           DEBUG_LOGFILE);
922
    _exit(1);
923
}
924

    
925
/* XXX: currently only used for async signals (see signal.c) */
926
CPUState *global_env;
927
/* used only if single thread */
928
CPUState *cpu_single_env = NULL;
929

    
930
/* used to free thread contexts */
931
TaskState *first_task_state;
932

    
933
int main(int argc, char **argv)
934
{
935
    const char *filename;
936
    struct target_pt_regs regs1, *regs = &regs1;
937
    struct image_info info1, *info = &info1;
938
    TaskState ts1, *ts = &ts1;
939
    CPUState *env;
940
    int optind;
941
    const char *r;
942
    
943
    if (argc <= 1)
944
        usage();
945

    
946
    /* init debug */
947
    cpu_set_log_filename(DEBUG_LOGFILE);
948

    
949
    optind = 1;
950
    for(;;) {
951
        if (optind >= argc)
952
            break;
953
        r = argv[optind];
954
        if (r[0] != '-')
955
            break;
956
        optind++;
957
        r++;
958
        if (!strcmp(r, "-")) {
959
            break;
960
        } else if (!strcmp(r, "d")) {
961
            int mask;
962
            CPULogItem *item;
963

    
964
            if (optind >= argc)
965
                break;
966
            
967
            r = argv[optind++];
968
            mask = cpu_str_to_log_mask(r);
969
            if (!mask) {
970
                printf("Log items (comma separated):\n");
971
                for(item = cpu_log_items; item->mask != 0; item++) {
972
                    printf("%-10s %s\n", item->name, item->help);
973
                }
974
                exit(1);
975
            }
976
            cpu_set_log(mask);
977
        } else if (!strcmp(r, "s")) {
978
            r = argv[optind++];
979
            x86_stack_size = strtol(r, (char **)&r, 0);
980
            if (x86_stack_size <= 0)
981
                usage();
982
            if (*r == 'M')
983
                x86_stack_size *= 1024 * 1024;
984
            else if (*r == 'k' || *r == 'K')
985
                x86_stack_size *= 1024;
986
        } else if (!strcmp(r, "L")) {
987
            interp_prefix = argv[optind++];
988
        } else if (!strcmp(r, "p")) {
989
            qemu_host_page_size = atoi(argv[optind++]);
990
            if (qemu_host_page_size == 0 ||
991
                (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
992
                fprintf(stderr, "page size must be a power of two\n");
993
                exit(1);
994
            }
995
        } else 
996
#ifdef USE_CODE_COPY
997
        if (!strcmp(r, "no-code-copy")) {
998
            code_copy_enabled = 0;
999
        } else 
1000
#endif
1001
        {
1002
            usage();
1003
        }
1004
    }
1005
    if (optind >= argc)
1006
        usage();
1007
    filename = argv[optind];
1008

    
1009
    /* Zero out regs */
1010
    memset(regs, 0, sizeof(struct target_pt_regs));
1011

    
1012
    /* Zero out image_info */
1013
    memset(info, 0, sizeof(struct image_info));
1014

    
1015
    /* Scan interp_prefix dir for replacement files. */
1016
    init_paths(interp_prefix);
1017

    
1018
    /* NOTE: we need to init the CPU at this stage to get
1019
       qemu_host_page_size */
1020
    env = cpu_init();
1021
    
1022
    if (elf_exec(filename, argv+optind, environ, regs, info) != 0) {
1023
        printf("Error loading %s\n", filename);
1024
        _exit(1);
1025
    }
1026
    
1027
    if (loglevel) {
1028
        page_dump(logfile);
1029
    
1030
        fprintf(logfile, "start_brk   0x%08lx\n" , info->start_brk);
1031
        fprintf(logfile, "end_code    0x%08lx\n" , info->end_code);
1032
        fprintf(logfile, "start_code  0x%08lx\n" , info->start_code);
1033
        fprintf(logfile, "end_data    0x%08lx\n" , info->end_data);
1034
        fprintf(logfile, "start_stack 0x%08lx\n" , info->start_stack);
1035
        fprintf(logfile, "brk         0x%08lx\n" , info->brk);
1036
        fprintf(logfile, "entry       0x%08lx\n" , info->entry);
1037
    }
1038

    
1039
    target_set_brk((char *)info->brk);
1040
    syscall_init();
1041
    signal_init();
1042

    
1043
    global_env = env;
1044

    
1045
    /* build Task State */
1046
    memset(ts, 0, sizeof(TaskState));
1047
    env->opaque = ts;
1048
    ts->used = 1;
1049
    env->user_mode_only = 1;
1050
    
1051
#if defined(TARGET_I386)
1052
    cpu_x86_set_cpl(env, 3);
1053

    
1054
    env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
1055
    env->hflags |= HF_PE_MASK | HF_OSFXSR_MASK;
1056
    
1057
    /* flags setup : we activate the IRQs by default as in user mode */
1058
    env->eflags |= IF_MASK;
1059
    
1060
    /* linux register setup */
1061
    env->regs[R_EAX] = regs->eax;
1062
    env->regs[R_EBX] = regs->ebx;
1063
    env->regs[R_ECX] = regs->ecx;
1064
    env->regs[R_EDX] = regs->edx;
1065
    env->regs[R_ESI] = regs->esi;
1066
    env->regs[R_EDI] = regs->edi;
1067
    env->regs[R_EBP] = regs->ebp;
1068
    env->regs[R_ESP] = regs->esp;
1069
    env->eip = regs->eip;
1070

    
1071
    /* linux interrupt setup */
1072
    env->idt.base = (long)idt_table;
1073
    env->idt.limit = sizeof(idt_table) - 1;
1074
    set_idt(0, 0);
1075
    set_idt(1, 0);
1076
    set_idt(2, 0);
1077
    set_idt(3, 3);
1078
    set_idt(4, 3);
1079
    set_idt(5, 3);
1080
    set_idt(6, 0);
1081
    set_idt(7, 0);
1082
    set_idt(8, 0);
1083
    set_idt(9, 0);
1084
    set_idt(10, 0);
1085
    set_idt(11, 0);
1086
    set_idt(12, 0);
1087
    set_idt(13, 0);
1088
    set_idt(14, 0);
1089
    set_idt(15, 0);
1090
    set_idt(16, 0);
1091
    set_idt(17, 0);
1092
    set_idt(18, 0);
1093
    set_idt(19, 0);
1094
    set_idt(0x80, 3);
1095

    
1096
    /* linux segment setup */
1097
    env->gdt.base = (long)gdt_table;
1098
    env->gdt.limit = sizeof(gdt_table) - 1;
1099
    write_dt(&gdt_table[__USER_CS >> 3], 0, 0xfffff,
1100
             DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 
1101
             (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
1102
    write_dt(&gdt_table[__USER_DS >> 3], 0, 0xfffff,
1103
             DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK | 
1104
             (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
1105
    cpu_x86_load_seg(env, R_CS, __USER_CS);
1106
    cpu_x86_load_seg(env, R_DS, __USER_DS);
1107
    cpu_x86_load_seg(env, R_ES, __USER_DS);
1108
    cpu_x86_load_seg(env, R_SS, __USER_DS);
1109
    cpu_x86_load_seg(env, R_FS, __USER_DS);
1110
    cpu_x86_load_seg(env, R_GS, __USER_DS);
1111

    
1112
#elif defined(TARGET_ARM)
1113
    {
1114
        int i;
1115
        for(i = 0; i < 16; i++) {
1116
            env->regs[i] = regs->uregs[i];
1117
        }
1118
        env->cpsr = regs->uregs[16];
1119
    }
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
#elif defined(TARGET_PPC)
1132
    {
1133
        int i;
1134
        for (i = 0; i < 32; i++) {
1135
            if (i != 12 && i != 6)
1136
                env->msr[i] = (regs->msr >> i) & 1;
1137
        }
1138
        env->nip = regs->nip;
1139
        for(i = 0; i < 32; i++) {
1140
            env->gpr[i] = regs->gpr[i];
1141
        }
1142
    }
1143
#else
1144
#error unsupported target CPU
1145
#endif
1146

    
1147
    cpu_loop(env);
1148
    /* never exits */
1149
    return 0;
1150
}