LXR qemu/darwin-user/main.c

   1/*
   2 *  qemu user main
   3 *
   4 *  Copyright (c) 2003 Fabrice Bellard
   5 *  Copyright (c) 2006 Pierre d'Herbemont
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License as published by
   9 *  the Free Software Foundation; either version 2 of the License, or
  10 *  (at your option) any later version.
  11 *
  12 *  This program is distributed in the hope that it will be useful,
  13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *  GNU General Public License for more details.
  16 *
  17 *  You should have received a copy of the GNU General Public License
  18 *  along with this program; if not, write to the Free Software
  19 *  Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
  20 *  MA 02110-1301, USA.
  21 */
  22#include <stdlib.h>
  23#include <stdio.h>
  24#include <stdarg.h>
  25#include <string.h>
  26#include <errno.h>
  27#include <unistd.h>
  28
  29#include <sys/syscall.h>
  30#include <sys/mman.h>
  31
  32#include "qemu.h"
  33
  34#define DEBUG_LOGFILE "/tmp/qemu.log"
  35
  36#ifdef __APPLE__
  37#include <crt_externs.h>
  38# define environ  (*_NSGetEnviron())
  39#endif
  40
  41#include <mach/mach_init.h>
  42#include <mach/vm_map.h>
  43
  44const char *interp_prefix = "";
  45
  46asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");
  47
  48/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so
  49   we allocate a bigger stack. Need a better solution, for example
  50   by remapping the process stack directly at the right place */
  51unsigned long stack_size = 512 * 1024;
  52
  53void qerror(const char *fmt, ...)
  54{
  55    va_list ap;
  56
  57    va_start(ap, fmt);
  58    vfprintf(stderr, fmt, ap);
  59    va_end(ap);
  60    fprintf(stderr, "\n");
  61    exit(1);
  62}
  63
  64void gemu_log(const char *fmt, ...)
  65{
  66    va_list ap;
  67
  68    va_start(ap, fmt);
  69    vfprintf(stderr, fmt, ap);
  70    va_end(ap);
  71}
  72
  73void cpu_outb(CPUState *env, int addr, int val)
  74{
  75    fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);
  76}
  77
  78void cpu_outw(CPUState *env, int addr, int val)
  79{
  80    fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);
  81}
  82
  83void cpu_outl(CPUState *env, int addr, int val)
  84{
  85    fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);
  86}
  87
  88int cpu_inb(CPUState *env, int addr)
  89{
  90    fprintf(stderr, "inb: port=0x%04x\n", addr);
  91    return 0;
  92}
  93
  94int cpu_inw(CPUState *env, int addr)
  95{
  96    fprintf(stderr, "inw: port=0x%04x\n", addr);
  97    return 0;
  98}
  99
 100int cpu_inl(CPUState *env, int addr)
 101{
 102    fprintf(stderr, "inl: port=0x%04x\n", addr);
 103    return 0;
 104}
 105
 106int cpu_get_pic_interrupt(CPUState *env)
 107{
 108    return -1;
 109}
 110#ifdef TARGET_PPC
 111
 112static inline uint64_t cpu_ppc_get_tb (CPUState *env)
 113{
 114    /* TO FIX */
 115    return 0;
 116}
 117
 118uint32_t cpu_ppc_load_tbl (CPUState *env)
 119{
 120    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 121}
 122
 123uint32_t cpu_ppc_load_tbu (CPUState *env)
 124{
 125    return cpu_ppc_get_tb(env) >> 32;
 126}
 127
 128uint32_t cpu_ppc_load_atbl (CPUState *env)
 129{
 130    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;
 131}
 132
 133uint32_t cpu_ppc_load_atbu (CPUState *env)
 134{
 135    return cpu_ppc_get_tb(env) >> 32;
 136}
 137
 138uint32_t cpu_ppc601_load_rtcu (CPUState *env)
 139{
 140    cpu_ppc_load_tbu(env);
 141}
 142
 143uint32_t cpu_ppc601_load_rtcl (CPUState *env)
 144{
 145    return cpu_ppc_load_tbl(env) & 0x3FFFFF80;
 146}
 147
 148/* XXX: to be fixed */
 149int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)
 150{
 151    return -1;
 152}
 153
 154int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)
 155{
 156    return -1;
 157}
 158
 159#define EXCP_DUMP(env, fmt, args...)                                         \
 160do {                                                                          \
 161    fprintf(stderr, fmt , ##args);                                            \
 162    cpu_dump_state(env, stderr, fprintf, 0);                                  \
 163    qemu_log(fmt, ##args);                                                   \
 164    log_cpu_state(env, 0);                                                      \
 165} while (0)
 166
 167void cpu_loop(CPUPPCState *env)
 168{
 169    int trapnr;
 170    uint32_t ret;
 171    target_siginfo_t info;
 172
 173    for(;;) {
 174        trapnr = cpu_ppc_exec(env);
 175        switch(trapnr) {
 176        case POWERPC_EXCP_NONE:
 177            /* Just go on */
 178            break;
 179        case POWERPC_EXCP_CRITICAL: /* Critical input                        */
 180            cpu_abort(env, "Critical interrupt while in user mode. "
 181                      "Aborting\n");
 182            break;
 183        case POWERPC_EXCP_MCHECK:   /* Machine check exception               */
 184            cpu_abort(env, "Machine check exception while in user mode. "
 185                      "Aborting\n");
 186            break;
 187        case POWERPC_EXCP_DSI:      /* Data storage exception                */
 188#ifndef DAR
 189/* To deal with multiple qemu header version as host for the darwin-user code */
 190# define DAR SPR_DAR
 191#endif
 192            EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",
 193                      env->spr[SPR_DAR]);
 194            /* Handle this via the gdb */
 195            gdb_handlesig (env, SIGSEGV);
 196
 197            info.si_addr = (void*)env->nip;
 198            queue_signal(info.si_signo, &info);
 199            break;
 200        case POWERPC_EXCP_ISI:      /* Instruction storage exception         */
 201            EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n",
 202                      env->spr[SPR_DAR]);
 203            /* Handle this via the gdb */
 204            gdb_handlesig (env, SIGSEGV);
 205
 206            info.si_addr = (void*)(env->nip - 4);
 207            queue_signal(info.si_signo, &info);
 208            break;
 209        case POWERPC_EXCP_EXTERNAL: /* External input                        */
 210            cpu_abort(env, "External interrupt while in user mode. "
 211                      "Aborting\n");
 212            break;
 213        case POWERPC_EXCP_ALIGN:    /* Alignment exception                   */
 214            EXCP_DUMP(env, "Unaligned memory access\n");
 215            info.si_errno = 0;
 216            info.si_code = BUS_ADRALN;
 217            info.si_addr = (void*)(env->nip - 4);
 218            queue_signal(info.si_signo, &info);
 219            break;
 220        case POWERPC_EXCP_PROGRAM:  /* Program exception                     */
 221            /* XXX: check this */
 222            switch (env->error_code & ~0xF) {
 223            case POWERPC_EXCP_FP:
 224                EXCP_DUMP(env, "Floating point program exception\n");
 225                /* Set FX */
 226                info.si_signo = SIGFPE;
 227                info.si_errno = 0;
 228                switch (env->error_code & 0xF) {
 229                case POWERPC_EXCP_FP_OX:
 230                    info.si_code = FPE_FLTOVF;
 231                    break;
 232                case POWERPC_EXCP_FP_UX:
 233                    info.si_code = FPE_FLTUND;
 234                    break;
 235                case POWERPC_EXCP_FP_ZX:
 236                case POWERPC_EXCP_FP_VXZDZ:
 237                    info.si_code = FPE_FLTDIV;
 238                    break;
 239                case POWERPC_EXCP_FP_XX:
 240                    info.si_code = FPE_FLTRES;
 241                    break;
 242                case POWERPC_EXCP_FP_VXSOFT:
 243                    info.si_code = FPE_FLTINV;
 244                    break;
 245                case POWERPC_EXCP_FP_VXSNAN:
 246                case POWERPC_EXCP_FP_VXISI:
 247                case POWERPC_EXCP_FP_VXIDI:
 248                case POWERPC_EXCP_FP_VXIMZ:
 249                case POWERPC_EXCP_FP_VXVC:
 250                case POWERPC_EXCP_FP_VXSQRT:
 251                case POWERPC_EXCP_FP_VXCVI:
 252                    info.si_code = FPE_FLTSUB;
 253                    break;
 254                default:
 255                    EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",
 256                              env->error_code);
 257                    break;
 258                }
 259                break;
 260            case POWERPC_EXCP_INVAL:
 261                EXCP_DUMP(env, "Invalid instruction\n");
 262                info.si_signo = SIGILL;
 263                info.si_errno = 0;
 264                switch (env->error_code & 0xF) {
 265                case POWERPC_EXCP_INVAL_INVAL:
 266                    info.si_code = ILL_ILLOPC;
 267                    break;
 268                case POWERPC_EXCP_INVAL_LSWX:
 269                    info.si_code = ILL_ILLOPN;
 270                    break;
 271                case POWERPC_EXCP_INVAL_SPR:
 272                    info.si_code = ILL_PRVREG;
 273                    break;
 274                case POWERPC_EXCP_INVAL_FP:
 275                    info.si_code = ILL_COPROC;
 276                    break;
 277                default:
 278                    EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
 279                              env->error_code & 0xF);
 280                    info.si_code = ILL_ILLADR;
 281                    break;
 282                }
 283                /* Handle this via the gdb */
 284                gdb_handlesig (env, SIGSEGV);
 285                break;
 286            case POWERPC_EXCP_PRIV:
 287                EXCP_DUMP(env, "Privilege violation\n");
 288                info.si_signo = SIGILL;
 289                info.si_errno = 0;
 290                switch (env->error_code & 0xF) {
 291                case POWERPC_EXCP_PRIV_OPC:
 292                    info.si_code = ILL_PRVOPC;
 293                    break;
 294                case POWERPC_EXCP_PRIV_REG:
 295                    info.si_code = ILL_PRVREG;
 296                    break;
 297                default:
 298                    EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
 299                              env->error_code & 0xF);
 300                    info.si_code = ILL_PRVOPC;
 301                    break;
 302                }
 303                break;
 304            case POWERPC_EXCP_TRAP:
 305                cpu_abort(env, "Tried to call a TRAP\n");
 306                break;
 307            default:
 308                /* Should not happen ! */
 309                cpu_abort(env, "Unknown program exception (%02x)\n",
 310                          env->error_code);
 311                break;
 312            }
 313            info.si_addr = (void*)(env->nip - 4);
 314            queue_signal(info.si_signo, &info);
 315            break;
 316        case POWERPC_EXCP_FPU:      /* Floating-point unavailable exception  */
 317            EXCP_DUMP(env, "No floating point allowed\n");
 318            info.si_signo = SIGILL;
 319            info.si_errno = 0;
 320            info.si_code = ILL_COPROC;
 321            info.si_addr = (void*)(env->nip - 4);
 322            queue_signal(info.si_signo, &info);
 323            break;
 324        case POWERPC_EXCP_SYSCALL:  /* System call exception                 */
 325            cpu_abort(env, "Syscall exception while in user mode. "
 326                      "Aborting\n");
 327            break;
 328        case POWERPC_EXCP_APU:      /* Auxiliary processor unavailable       */
 329            EXCP_DUMP(env, "No APU instruction allowed\n");
 330            info.si_signo = SIGILL;
 331            info.si_errno = 0;
 332            info.si_code = ILL_COPROC;
 333            info.si_addr = (void*)(env->nip - 4);
 334            queue_signal(info.si_signo, &info);
 335            break;
 336        case POWERPC_EXCP_DECR:     /* Decrementer exception                 */
 337            cpu_abort(env, "Decrementer interrupt while in user mode. "
 338                      "Aborting\n");
 339            break;
 340        case POWERPC_EXCP_FIT:      /* Fixed-interval timer interrupt        */
 341            cpu_abort(env, "Fix interval timer interrupt while in user mode. "
 342                      "Aborting\n");
 343            break;
 344        case POWERPC_EXCP_WDT:      /* Watchdog timer interrupt              */
 345            cpu_abort(env, "Watchdog timer interrupt while in user mode. "
 346                      "Aborting\n");
 347            break;
 348        case POWERPC_EXCP_DTLB:     /* Data TLB error                        */
 349            cpu_abort(env, "Data TLB exception while in user mode. "
 350                      "Aborting\n");
 351            break;
 352        case POWERPC_EXCP_ITLB:     /* Instruction TLB error                 */
 353            cpu_abort(env, "Instruction TLB exception while in user mode. "
 354                      "Aborting\n");
 355            break;
 356        case POWERPC_EXCP_DEBUG:    /* Debug interrupt                       */
 357            gdb_handlesig (env, SIGTRAP);
 358            break;
 359        case POWERPC_EXCP_SPEU:     /* SPE/embedded floating-point unavail.  */
 360            EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
 361            info.si_signo = SIGILL;
 362            info.si_errno = 0;
 363            info.si_code = ILL_COPROC;
 364            info.si_addr = (void*)(env->nip - 4);
 365            queue_signal(info.si_signo, &info);
 366            break;
 367        case POWERPC_EXCP_EFPDI:    /* Embedded floating-point data IRQ      */
 368            cpu_abort(env, "Embedded floating-point data IRQ not handled\n");
 369            break;
 370        case POWERPC_EXCP_EFPRI:    /* Embedded floating-point round IRQ     */
 371            cpu_abort(env, "Embedded floating-point round IRQ not handled\n");
 372            break;
 373        case POWERPC_EXCP_EPERFM:   /* Embedded performance monitor IRQ      */
 374            cpu_abort(env, "Performance monitor exception not handled\n");
 375            break;
 376        case POWERPC_EXCP_DOORI:    /* Embedded doorbell interrupt           */
 377            cpu_abort(env, "Doorbell interrupt while in user mode. "
 378                       "Aborting\n");
 379            break;
 380        case POWERPC_EXCP_DOORCI:   /* Embedded doorbell critical interrupt  */
 381            cpu_abort(env, "Doorbell critical interrupt while in user mode. "
 382                      "Aborting\n");
 383            break;
 384        case POWERPC_EXCP_RESET:    /* System reset exception                */
 385            cpu_abort(env, "Reset interrupt while in user mode. "
 386                      "Aborting\n");
 387            break;
 388        case POWERPC_EXCP_DSEG:     /* Data segment exception                */
 389            cpu_abort(env, "Data segment exception while in user mode. "
 390                      "Aborting\n");
 391            break;
 392        case POWERPC_EXCP_ISEG:     /* Instruction segment exception         */
 393            cpu_abort(env, "Instruction segment exception "
 394                      "while in user mode. Aborting\n");
 395            break;
 396        case POWERPC_EXCP_HDECR:    /* Hypervisor decrementer exception      */
 397            cpu_abort(env, "Hypervisor decrementer interrupt "
 398                      "while in user mode. Aborting\n");
 399            break;
 400        case POWERPC_EXCP_TRACE:    /* Trace exception                       */
 401            /* Nothing to do:
 402             * we use this exception to emulate step-by-step execution mode.
 403             */
 404            break;
 405        case POWERPC_EXCP_HDSI:     /* Hypervisor data storage exception     */
 406            cpu_abort(env, "Hypervisor data storage exception "
 407                      "while in user mode. Aborting\n");
 408            break;
 409        case POWERPC_EXCP_HISI:     /* Hypervisor instruction storage excp   */
 410            cpu_abort(env, "Hypervisor instruction storage exception "
 411                      "while in user mode. Aborting\n");
 412            break;
 413        case POWERPC_EXCP_HDSEG:    /* Hypervisor data segment exception     */
 414            cpu_abort(env, "Hypervisor data segment exception "
 415                      "while in user mode. Aborting\n");
 416            break;
 417        case POWERPC_EXCP_HISEG:    /* Hypervisor instruction segment excp   */
 418            cpu_abort(env, "Hypervisor instruction segment exception "
 419                      "while in user mode. Aborting\n");
 420            break;
 421        case POWERPC_EXCP_VPU:      /* Vector unavailable exception          */
 422            EXCP_DUMP(env, "No Altivec instructions allowed\n");
 423            info.si_signo = SIGILL;
 424            info.si_errno = 0;
 425            info.si_code = ILL_COPROC;
 426            info.si_addr = (void*)(env->nip - 4);
 427            queue_signal(info.si_signo, &info);
 428            break;
 429        case POWERPC_EXCP_PIT:      /* Programmable interval timer IRQ       */
 430            cpu_abort(env, "Programable interval timer interrupt "
 431                      "while in user mode. Aborting\n");
 432            break;
 433        case POWERPC_EXCP_IO:       /* IO error exception                    */
 434            cpu_abort(env, "IO error exception while in user mode. "
 435                      "Aborting\n");
 436            break;
 437        case POWERPC_EXCP_RUNM:     /* Run mode exception                    */
 438            cpu_abort(env, "Run mode exception while in user mode. "
 439                      "Aborting\n");
 440            break;
 441        case POWERPC_EXCP_EMUL:     /* Emulation trap exception              */
 442            cpu_abort(env, "Emulation trap exception not handled\n");
 443            break;
 444        case POWERPC_EXCP_IFTLB:    /* Instruction fetch TLB error           */
 445            cpu_abort(env, "Instruction fetch TLB exception "
 446                      "while in user-mode. Aborting");
 447            break;
 448        case POWERPC_EXCP_DLTLB:    /* Data load TLB miss                    */
 449            cpu_abort(env, "Data load TLB exception while in user-mode. "
 450                      "Aborting");
 451            break;
 452        case POWERPC_EXCP_DSTLB:    /* Data store TLB miss                   */
 453            cpu_abort(env, "Data store TLB exception while in user-mode. "
 454                      "Aborting");
 455            break;
 456        case POWERPC_EXCP_FPA:      /* Floating-point assist exception       */
 457            cpu_abort(env, "Floating-point assist exception not handled\n");
 458            break;
 459        case POWERPC_EXCP_IABR:     /* Instruction address breakpoint        */
 460            cpu_abort(env, "Instruction address breakpoint exception "
 461                      "not handled\n");
 462            break;
 463        case POWERPC_EXCP_SMI:      /* System management interrupt           */
 464            cpu_abort(env, "System management interrupt while in user mode. "
 465                      "Aborting\n");
 466            break;
 467        case POWERPC_EXCP_THERM:    /* Thermal interrupt                     */
 468            cpu_abort(env, "Thermal interrupt interrupt while in user mode. "
 469                      "Aborting\n");
 470            break;
 471        case POWERPC_EXCP_PERFM:    /* Embedded performance monitor IRQ      */
 472            cpu_abort(env, "Performance monitor exception not handled\n");
 473            break;
 474        case POWERPC_EXCP_VPUA:     /* Vector assist exception               */
 475            cpu_abort(env, "Vector assist exception not handled\n");
 476            break;
 477        case POWERPC_EXCP_SOFTP:    /* Soft patch exception                  */
 478            cpu_abort(env, "Soft patch exception not handled\n");
 479            break;
 480        case POWERPC_EXCP_MAINT:    /* Maintenance exception                 */
 481            cpu_abort(env, "Maintenance exception while in user mode. "
 482                      "Aborting\n");
 483            break;
 484        case POWERPC_EXCP_STOP:     /* stop translation                      */
 485            /* We did invalidate the instruction cache. Go on */
 486            break;
 487        case POWERPC_EXCP_BRANCH:   /* branch instruction:                   */
 488            /* We just stopped because of a branch. Go on */
 489            break;
 490        case POWERPC_EXCP_SYSCALL_USER:
 491            /* system call in user-mode emulation */
 492            /* system call */
 493            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
 494                ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],
 495                                      env->gpr[5], env->gpr[6], env->gpr[7],
 496                                      env->gpr[8], env->gpr[9], env->gpr[10]*/);
 497            else if(((int)env->gpr[0])<0)
 498                ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
 499                                      env->gpr[5], env->gpr[6], env->gpr[7],
 500                                      env->gpr[8], env->gpr[9], env->gpr[10]);
 501            else
 502                ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
 503                                        env->gpr[5], env->gpr[6], env->gpr[7],
 504                                        env->gpr[8], env->gpr[9], env->gpr[10]);
 505
 506            /* Unix syscall error signaling */
 507            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)
 508            {
 509                if( (int)ret < 0 )
 510                    env->nip += 0;
 511                else
 512                    env->nip += 4;
 513            }
 514
 515            /* Return value */
 516            env->gpr[3] = ret;
 517            break;
 518        case EXCP_INTERRUPT:
 519            /* just indicate that signals should be handled asap */
 520            break;
 521        default:
 522            cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);
 523            break;
 524        }
 525        process_pending_signals(env);
 526    }
 527}
 528#endif
 529
 530
 531#ifdef TARGET_I386
 532
 533/***********************************************************/
 534/* CPUX86 core interface */
 535
 536uint64_t cpu_get_tsc(CPUX86State *env)
 537{
 538    return cpu_get_real_ticks();
 539}
 540
 541void
 542write_dt(void *ptr, unsigned long addr, unsigned long limit,
 543                     int flags)
 544{
 545    unsigned int e1, e2;
 546    e1 = (addr << 16) | (limit & 0xffff);
 547    e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);
 548    e2 |= flags;
 549    stl((uint8_t *)ptr, e1);
 550    stl((uint8_t *)ptr + 4, e2);
 551}
 552
 553static void set_gate(void *ptr, unsigned int type, unsigned int dpl,
 554                     unsigned long addr, unsigned int sel)
 555{
 556    unsigned int e1, e2;
 557    e1 = (addr & 0xffff) | (sel << 16);
 558    e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);
 559    stl((uint8_t *)ptr, e1);
 560    stl((uint8_t *)ptr + 4, e2);
 561}
 562
 563#define GDT_TABLE_SIZE 14
 564#define LDT_TABLE_SIZE 15
 565#define IDT_TABLE_SIZE 256
 566#define TSS_SIZE 104
 567uint64_t gdt_table[GDT_TABLE_SIZE];
 568uint64_t ldt_table[LDT_TABLE_SIZE];
 569uint64_t idt_table[IDT_TABLE_SIZE];
 570uint32_t tss[TSS_SIZE];
 571
 572/* only dpl matters as we do only user space emulation */
 573static void set_idt(int n, unsigned int dpl)
 574{
 575    set_gate(idt_table + n, 0, dpl, 0, 0);
 576}
 577
 578/* ABI convention: after a syscall if there was an error the CF flag is set */
 579static inline void set_error(CPUX86State *env, int ret)
 580{
 581    if(ret<0)
 582        env->eflags = env->eflags | 0x1;
 583    else
 584        env->eflags &= ~0x1;
 585    env->regs[R_EAX] = ret;
 586}
 587
 588void cpu_loop(CPUX86State *env)
 589{
 590    int trapnr;
 591    int ret;
 592    uint8_t *pc;
 593    target_siginfo_t info;
 594
 595    for(;;) {
 596        trapnr = cpu_x86_exec(env);
 597        uint32_t *params = (uint32_t *)env->regs[R_ESP];
 598        switch(trapnr) {
 599        case 0x79: /* Our commpage hack back door exit is here */
 600            do_commpage(env,  env->eip,   *(params + 1), *(params + 2),
 601                                          *(params + 3), *(params + 4),
 602                                          *(params + 5), *(params + 6),
 603                                          *(params + 7), *(params + 8));
 604            break;
 605        case 0x81: /* mach syscall */
 606        {
 607            ret = do_mach_syscall(env,  env->regs[R_EAX],
 608                                          *(params + 1), *(params + 2),
 609                                          *(params + 3), *(params + 4),
 610                                          *(params + 5), *(params + 6),
 611                                          *(params + 7), *(params + 8));
 612            set_error(env, ret);
 613            break;
 614        }
 615        case 0x90: /* unix backdoor */
 616        {
 617            /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/
 618            int saved_stack = env->regs[R_ESP];
 619            env->regs[R_ESP] = env->regs[R_ECX];
 620
 621            ret = do_unix_syscall(env, env->regs[R_EAX]);
 622
 623            env->regs[R_ECX] = env->regs[R_ESP];
 624            env->regs[R_ESP] = saved_stack;
 625
 626            set_error(env, ret);
 627            break;
 628        }
 629        case 0x80: /* unix syscall */
 630        {
 631            ret = do_unix_syscall(env, env->regs[R_EAX]/*,
 632                                          *(params + 1), *(params + 2),
 633                                          *(params + 3), *(params + 4),
 634                                          *(params + 5), *(params + 6),
 635                                          *(params + 7), *(params + 8)*/);
 636            set_error(env, ret);
 637            break;
 638        }
 639        case 0x82: /* thread syscall */
 640        {
 641            ret = do_thread_syscall(env,  env->regs[R_EAX],
 642                                          *(params + 1), *(params + 2),
 643                                          *(params + 3), *(params + 4),
 644                                          *(params + 5), *(params + 6),
 645                                          *(params + 7), *(params + 8));
 646            set_error(env, ret);
 647            break;
 648        }
 649        case EXCP0B_NOSEG:
 650        case EXCP0C_STACK:
 651            info.si_signo = SIGBUS;
 652            info.si_errno = 0;
 653            info.si_code = BUS_NOOP;
 654            info.si_addr = 0;
 655            gdb_handlesig (env, SIGBUS);
 656            queue_signal(info.si_signo, &info);
 657            break;
 658        case EXCP0D_GPF:
 659            info.si_signo = SIGSEGV;
 660            info.si_errno = 0;
 661            info.si_code = SEGV_NOOP;
 662            info.si_addr = 0;
 663            gdb_handlesig (env, SIGSEGV);
 664            queue_signal(info.si_signo, &info);
 665            break;
 666        case EXCP0E_PAGE:
 667            info.si_signo = SIGSEGV;
 668            info.si_errno = 0;
 669            if (!(env->error_code & 1))
 670                info.si_code = SEGV_MAPERR;
 671            else
 672                info.si_code = SEGV_ACCERR;
 673            info.si_addr = (void*)env->cr[2];
 674            gdb_handlesig (env, SIGSEGV);
 675            queue_signal(info.si_signo, &info);
 676            break;
 677        case EXCP00_DIVZ:
 678            /* division by zero */
 679            info.si_signo = SIGFPE;
 680            info.si_errno = 0;
 681            info.si_code = FPE_INTDIV;
 682            info.si_addr = (void*)env->eip;
 683            gdb_handlesig (env, SIGFPE);
 684            queue_signal(info.si_signo, &info);
 685            break;
 686        case EXCP01_SSTP:
 687        case EXCP03_INT3:
 688            info.si_signo = SIGTRAP;
 689            info.si_errno = 0;
 690            info.si_code = TRAP_BRKPT;
 691            info.si_addr = (void*)env->eip;
 692            gdb_handlesig (env, SIGTRAP);
 693            queue_signal(info.si_signo, &info);
 694            break;
 695        case EXCP04_INTO:
 696        case EXCP05_BOUND:
 697            info.si_signo = SIGSEGV;
 698            info.si_errno = 0;
 699            info.si_code = SEGV_NOOP;
 700            info.si_addr = 0;
 701            gdb_handlesig (env, SIGSEGV);
 702            queue_signal(info.si_signo, &info);
 703            break;
 704        case EXCP06_ILLOP:
 705            info.si_signo = SIGILL;
 706            info.si_errno = 0;
 707            info.si_code = ILL_ILLOPN;
 708            info.si_addr = (void*)env->eip;
 709            gdb_handlesig (env, SIGILL);
 710            queue_signal(info.si_signo, &info);
 711            break;
 712        case EXCP_INTERRUPT:
 713            /* just indicate that signals should be handled asap */
 714            break;
 715        case EXCP_DEBUG:
 716            {
 717                int sig;
 718
 719                sig = gdb_handlesig (env, SIGTRAP);
 720                if (sig)
 721                  {
 722                    info.si_signo = sig;
 723                    info.si_errno = 0;
 724                    info.si_code = TRAP_BRKPT;
 725                    queue_signal(info.si_signo, &info);
 726                  }
 727            }
 728            break;
 729        default:
 730            pc = (void*)(env->segs[R_CS].base + env->eip);
 731            fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",
 732                    (long)pc, trapnr);
 733            abort();
 734        }
 735        process_pending_signals(env);
 736    }
 737}
 738#endif
 739
 740void usage(void)
 741{
 742    printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"
 743           "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"
 744           "Darwin CPU emulator (compiled for %s emulation)\n"
 745           "\n"
 746           "-h           print this help\n"
 747           "-L path      set the %s library path (default='%s')\n"
 748           "-s size      set the stack size in bytes (default=%ld)\n"
 749           "\n"
 750           "debug options:\n"
 751           "-d options   activate log (logfile='%s')\n"
 752           "-g wait for gdb on port 1234\n"
 753           "-p pagesize  set the host page size to 'pagesize'\n",
 754           TARGET_ARCH,
 755           TARGET_ARCH,
 756           interp_prefix,
 757           stack_size,
 758           DEBUG_LOGFILE);
 759    exit(1);
 760}
 761
 762/* XXX: currently only used for async signals (see signal.c) */
 763CPUState *global_env;
 764/* used only if single thread */
 765CPUState *cpu_single_env = NULL;
 766
 767/* used to free thread contexts */
 768TaskState *first_task_state;
 769
 770int main(int argc, char **argv)
 771{
 772    const char *filename;
 773    struct target_pt_regs regs1, *regs = &regs1;
 774    TaskState ts1, *ts = &ts1;
 775    CPUState *env;
 776    int optind;
 777    short use_gdbstub = 0;
 778    const char *r;
 779    const char *cpu_model;
 780
 781    if (argc <= 1)
 782        usage();
 783
 784    /* init debug */
 785    cpu_set_log_filename(DEBUG_LOGFILE);
 786
 787    optind = 1;
 788    for(;;) {
 789        if (optind >= argc)
 790            break;
 791        r = argv[optind];
 792        if (r[0] != '-')
 793            break;
 794        optind++;
 795        r++;
 796        if (!strcmp(r, "-")) {
 797            break;
 798        } else if (!strcmp(r, "d")) {
 799            int mask;
 800            CPULogItem *item;
 801
 802        if (optind >= argc)
 803        break;
 804
 805        r = argv[optind++];
 806            mask = cpu_str_to_log_mask(r);
 807            if (!mask) {
 808                printf("Log items (comma separated):\n");
 809                for(item = cpu_log_items; item->mask != 0; item++) {
 810                    printf("%-10s %s\n", item->name, item->help);
 811                }
 812                exit(1);
 813            }
 814            cpu_set_log(mask);
 815        } else if (!strcmp(r, "s")) {
 816            r = argv[optind++];
 817            stack_size = strtol(r, (char **)&r, 0);
 818            if (stack_size <= 0)
 819                usage();
 820            if (*r == 'M')
 821                stack_size *= 1024 * 1024;
 822            else if (*r == 'k' || *r == 'K')
 823                stack_size *= 1024;
 824        } else if (!strcmp(r, "L")) {
 825            interp_prefix = argv[optind++];
 826        } else if (!strcmp(r, "p")) {
 827            qemu_host_page_size = atoi(argv[optind++]);
 828            if (qemu_host_page_size == 0 ||
 829                (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {
 830                fprintf(stderr, "page size must be a power of two\n");
 831                exit(1);
 832            }
 833        } else
 834        if (!strcmp(r, "g")) {
 835            use_gdbstub = 1;
 836        } else if (!strcmp(r, "cpu")) {
 837            cpu_model = argv[optind++];
 838            if (strcmp(cpu_model, "?") == 0) {
 839/* XXX: implement xxx_cpu_list for targets that still miss it */
 840#if defined(cpu_list)
 841                    cpu_list(stdout, &fprintf);
 842#endif
 843                exit(1);
 844            }
 845        } else
 846        {
 847            usage();
 848        }
 849    }
 850    if (optind >= argc)
 851        usage();
 852    filename = argv[optind];
 853
 854    /* Zero out regs */
 855    memset(regs, 0, sizeof(struct target_pt_regs));
 856
 857    if (cpu_model == NULL) {
 858#if defined(TARGET_I386)
 859#ifdef TARGET_X86_64
 860        cpu_model = "qemu64";
 861#else
 862        cpu_model = "qemu32";
 863#endif
 864#elif defined(TARGET_PPC)
 865#ifdef TARGET_PPC64
 866        cpu_model = "970";
 867#else
 868        cpu_model = "750";
 869#endif
 870#else
 871#error unsupported CPU
 872#endif
 873    }
 874    
 875    cpu_exec_init_all(0);
 876    /* NOTE: we need to init the CPU at this stage to get
 877       qemu_host_page_size */
 878    env = cpu_init(cpu_model);
 879
 880    printf("Starting %s with qemu\n----------------\n", filename);
 881
 882    commpage_init();
 883
 884    if (mach_exec(filename, argv+optind, environ, regs) != 0) {
 885    printf("Error loading %s\n", filename);
 886    _exit(1);
 887    }
 888
 889    syscall_init();
 890    signal_init();
 891    global_env = env;
 892
 893    /* build Task State */
 894    memset(ts, 0, sizeof(TaskState));
 895    env->opaque = ts;
 896    ts->used = 1;
 897
 898#if defined(TARGET_I386)
 899    cpu_x86_set_cpl(env, 3);
 900
 901    env->cr[0] = CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK;
 902    env->hflags |= HF_PE_MASK;
 903
 904    if (env->cpuid_features & CPUID_SSE) {
 905        env->cr[4] |= CR4_OSFXSR_MASK;
 906        env->hflags |= HF_OSFXSR_MASK;
 907    }
 908
 909    /* flags setup : we activate the IRQs by default as in user mode */
 910    env->eflags |= IF_MASK;
 911
 912    /* darwin register setup */
 913    env->regs[R_EAX] = regs->eax;
 914    env->regs[R_EBX] = regs->ebx;
 915    env->regs[R_ECX] = regs->ecx;
 916    env->regs[R_EDX] = regs->edx;
 917    env->regs[R_ESI] = regs->esi;
 918    env->regs[R_EDI] = regs->edi;
 919    env->regs[R_EBP] = regs->ebp;
 920    env->regs[R_ESP] = regs->esp;
 921    env->eip = regs->eip;
 922
 923    /* Darwin LDT setup */
 924    /* 2 - User code segment
 925       3 - User data segment
 926       4 - User cthread */
 927    bzero(ldt_table, LDT_TABLE_SIZE * sizeof(ldt_table[0]));
 928    env->ldt.base = (uint32_t) ldt_table;
 929    env->ldt.limit = sizeof(ldt_table) - 1;
 930
 931    write_dt(ldt_table + 2, 0, 0xfffff,
 932             DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 933             (3 << DESC_DPL_SHIFT) | (0xa << DESC_TYPE_SHIFT));
 934    write_dt(ldt_table + 3, 0, 0xfffff,
 935             DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 936             (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
 937    write_dt(ldt_table + 4, 0, 0xfffff,
 938             DESC_G_MASK | DESC_B_MASK | DESC_P_MASK | DESC_S_MASK |
 939             (3 << DESC_DPL_SHIFT) | (0x2 << DESC_TYPE_SHIFT));
 940
 941    /* Darwin GDT setup.
 942     * has changed a lot between old Darwin/x86 (pre-Mac Intel) and Mac OS X/x86,
 943       now everything is done via  int 0x81(mach) int 0x82 (thread) and sysenter/sysexit(unix) */
 944    bzero(gdt_table, sizeof(gdt_table));
 945    env->gdt.base = (uint32_t)gdt_table;
 946    env->gdt.limit = sizeof(gdt_table) - 1;
 947
 948    /* Set up a back door to handle sysenter syscalls (unix) */
 949    char * syscallbackdoor = malloc(64);
 950    page_set_flags((int)syscallbackdoor, (int)syscallbackdoor + 64, PROT_EXEC | PROT_READ | PAGE_VALID);
 951
 952    int i = 0;
 953    syscallbackdoor[i++] = 0xcd;
 954    syscallbackdoor[i++] = 0x90; /* int 0x90 */
 955    syscallbackdoor[i++] = 0x0F;
 956    syscallbackdoor[i++] = 0x35; /* sysexit */
 957
 958    /* Darwin sysenter/sysexit setup */
 959    env->sysenter_cs = 0x1; //XXX
 960    env->sysenter_eip = (int)syscallbackdoor;
 961    env->sysenter_esp = (int)malloc(64);
 962
 963    /* Darwin TSS setup
 964       This must match up with GDT[4] */
 965    env->tr.base = (uint32_t) tss;
 966    env->tr.limit = sizeof(tss) - 1;
 967    env->tr.flags = DESC_P_MASK | (0x9 << DESC_TYPE_SHIFT);
 968    stw(tss + 2, 0x10);  // ss0 = 0x10 = GDT[2] = Kernel Data Segment
 969
 970    /* Darwin interrupt setup */
 971    bzero(idt_table, sizeof(idt_table));
 972    env->idt.base = (uint32_t) idt_table;
 973    env->idt.limit = sizeof(idt_table) - 1;
 974    set_idt(0, 0);
 975    set_idt(1, 0);
 976    set_idt(2, 0);
 977    set_idt(3, 3);
 978    set_idt(4, 3);
 979    set_idt(5, 3);
 980    set_idt(6, 0);
 981    set_idt(7, 0);
 982    set_idt(8, 0);
 983    set_idt(9, 0);
 984    set_idt(10, 0);
 985    set_idt(11, 0);
 986    set_idt(12, 0);
 987    set_idt(13, 0);
 988    set_idt(14, 0);
 989    set_idt(15, 0);
 990    set_idt(16, 0);
 991    set_idt(17, 0);
 992    set_idt(18, 0);
 993    set_idt(19, 0);
 994    /* Syscalls are done via
 995        int 0x80 (unix) (rarely used)
 996        int 0x81 (mach)
 997        int 0x82 (thread)
 998        int 0x83 (diag) (not handled here)
 999        sysenter/sysexit (unix) -> we redirect that to int 0x90 */
1000    set_idt(0x79, 3); /* Commpage hack, here is our backdoor interrupt */

1001    set_idt(0x80, 3); /* Unix Syscall */
1002    set_idt(0x81, 3); /* Mach Syscalls */
1003    set_idt(0x82, 3); /* thread Syscalls */
1004
1005    set_idt(0x90, 3); /* qemu-darwin-user's Unix syscalls backdoor */
1006
1007
1008    cpu_x86_load_seg(env, R_CS, __USER_CS);
1009    cpu_x86_load_seg(env, R_DS, __USER_DS);
1010    cpu_x86_load_seg(env, R_ES, __USER_DS);
1011    cpu_x86_load_seg(env, R_SS, __USER_DS);
1012    cpu_x86_load_seg(env, R_FS, __USER_DS);
1013    cpu_x86_load_seg(env, R_GS, __USER_DS);
1014
1015#elif defined(TARGET_PPC)
1016    {
1017        int i;
1018
1019#if defined(TARGET_PPC64)
1020#if defined(TARGET_ABI32)
1021        env->msr &= ~((target_ulong)1 << MSR_SF);
1022#else
1023        env->msr |= (target_ulong)1 << MSR_SF;
1024#endif
1025#endif
1026        env->nip = regs->nip;
1027        for(i = 0; i < 32; i++) {
1028            env->gpr[i] = regs->gpr[i];
1029        }
1030    }
1031#else
1032#error unsupported target CPU
1033#endif
1034
1035    if (use_gdbstub) {
1036        printf("Waiting for gdb Connection on port 1234...\n");
1037        gdbserver_start (1234);
1038        gdb_handlesig(env, 0);
1039    }
1040
1041    cpu_loop(env);
1042    /* never exits */
1043    return 0;
1044}
1045