Archipelago » qemu

/*

 *  qemu user main

 *

 *  Copyright (c) 2003 Fabrice Bellard

 *  Copyright (c) 2006 Pierre d'Herbemont

 *

 *  This program is free software; you can redistribute it and/or modify

 *  it under the terms of the GNU General Public License as published by

 *  the Free Software Foundation; either version 2 of the License, or

 *  (at your option) any later version.

 *

 *  This program is distributed in the hope that it will be useful,

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *  GNU General Public License for more details.

 *

 *  You should have received a copy of the GNU General Public License

 *  along with this program; if not, write to the Free Software

 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 */

#include <stdlib.h>

#include <stdio.h>

#include <stdarg.h>

#include <string.h>

#include <errno.h>

#include <unistd.h>

#include <sys/syscall.h>

#include <sys/mman.h>

#include "qemu.h"

#define DEBUG_LOGFILE "/tmp/qemu.log"

#ifdef __APPLE__

#include <crt_externs.h>

# define environ  (*_NSGetEnviron())

#endif

#include <mach/mach_init.h>

#include <mach/vm_map.h>

const char *interp_prefix = "";

asm(".zerofill __STD_PROG_ZONE, __STD_PROG_ZONE, __std_prog_zone, 0x0dfff000");

/* XXX: on x86 MAP_GROWSDOWN only works if ESP <= address + 32, so

   we allocate a bigger stack. Need a better solution, for example

   by remapping the process stack directly at the right place */

unsigned long stack_size = 512 * 1024;

void qerror(const char *fmt, ...)

{

    va_list ap;

    va_start(ap, fmt);

    vfprintf(stderr, fmt, ap);

    va_end(ap);

    fprintf(stderr, "\n");

    exit(1);

}

void gemu_log(const char *fmt, ...)

{

    va_list ap;

    va_start(ap, fmt);

    vfprintf(stderr, fmt, ap);

    va_end(ap);

}

void cpu_outb(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outb: port=0x%04x, data=%02x\n", addr, val);

}

void cpu_outw(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outw: port=0x%04x, data=%04x\n", addr, val);

}

void cpu_outl(CPUState *env, int addr, int val)

{

    fprintf(stderr, "outl: port=0x%04x, data=%08x\n", addr, val);

}

int cpu_inb(CPUState *env, int addr)

{

    fprintf(stderr, "inb: port=0x%04x\n", addr);

    return 0;

}

int cpu_inw(CPUState *env, int addr)

{

    fprintf(stderr, "inw: port=0x%04x\n", addr);

    return 0;

}

int cpu_inl(CPUState *env, int addr)

{

    fprintf(stderr, "inl: port=0x%04x\n", addr);

    return 0;

}

int cpu_get_pic_interrupt(CPUState *env)

{

    return -1;

}

#ifdef TARGET_PPC

static inline uint64_t cpu_ppc_get_tb (CPUState *env)

{

    /* TO FIX */

    return 0;

}

uint32_t cpu_ppc_load_tbl (CPUState *env)

{

    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;

}

uint32_t cpu_ppc_load_tbu (CPUState *env)

{

    return cpu_ppc_get_tb(env) >> 32;

}

uint32_t cpu_ppc_load_atbl (CPUState *env)

{

    return cpu_ppc_get_tb(env) & 0xFFFFFFFF;

}

uint32_t cpu_ppc_load_atbu (CPUState *env)

{

    return cpu_ppc_get_tb(env) >> 32;

}

uint32_t cpu_ppc601_load_rtcu (CPUState *env)

{

    cpu_ppc_load_tbu(env);

}

uint32_t cpu_ppc601_load_rtcl (CPUState *env)

{

    return cpu_ppc_load_tbl(env) & 0x3FFFFF80;

}

/* XXX: to be fixed */

int ppc_dcr_read (ppc_dcr_t *dcr_env, int dcrn, target_ulong *valp)

{

    return -1;

}

int ppc_dcr_write (ppc_dcr_t *dcr_env, int dcrn, target_ulong val)

{

    return -1;

}

#define EXCP_DUMP(env, fmt, args...)                                         \

do {                                                                          \

    fprintf(stderr, fmt , ##args);                                            \

    cpu_dump_state(env, stderr, fprintf, 0);                                  \

    if (loglevel != 0) {                                                      \

        fprintf(logfile, fmt , ##args);                                       \

        cpu_dump_state(env, logfile, fprintf, 0);                             \

    }                                                                         \

} while (0)

void cpu_loop(CPUPPCState *env)

{

    int trapnr;

    uint32_t ret;

    target_siginfo_t info;

    for(;;) {

        trapnr = cpu_ppc_exec(env);

        switch(trapnr) {

        case POWERPC_EXCP_NONE:

            /* Just go on */

            break;

        case POWERPC_EXCP_CRITICAL: /* Critical input                        */

            cpu_abort(env, "Critical interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_MCHECK:   /* Machine check exception               */

            cpu_abort(env, "Machine check exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DSI:      /* Data storage exception                */

#ifndef DAR

/* To deal with multiple qemu header version as host for the darwin-user code */

# define DAR SPR_DAR

#endif

            EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",

                      env->spr[SPR_DAR]);

            /* Handle this via the gdb */

            gdb_handlesig (env, SIGSEGV);

            info.si_addr = (void*)env->nip;

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_ISI:      /* Instruction storage exception         */

            EXCP_DUMP(env, "Invalid instruction fetch: 0x\n" ADDRX "\n",

                      env->spr[SPR_DAR]);

            /* Handle this via the gdb */

            gdb_handlesig (env, SIGSEGV);

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_EXTERNAL: /* External input                        */

            cpu_abort(env, "External interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ALIGN:    /* Alignment exception                   */

            EXCP_DUMP(env, "Unaligned memory access\n");

            info.si_errno = 0;

            info.si_code = BUS_ADRALN;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_PROGRAM:  /* Program exception                     */

            /* XXX: check this */

            switch (env->error_code & ~0xF) {

            case POWERPC_EXCP_FP:

                EXCP_DUMP(env, "Floating point program exception\n");

                /* Set FX */

                info.si_signo = SIGFPE;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_FP_OX:

                    info.si_code = FPE_FLTOVF;

                    break;

                case POWERPC_EXCP_FP_UX:

                    info.si_code = FPE_FLTUND;

                    break;

                case POWERPC_EXCP_FP_ZX:

                case POWERPC_EXCP_FP_VXZDZ:

                    info.si_code = FPE_FLTDIV;

                    break;

                case POWERPC_EXCP_FP_XX:

                    info.si_code = FPE_FLTRES;

                    break;

                case POWERPC_EXCP_FP_VXSOFT:

                    info.si_code = FPE_FLTINV;

                    break;

                case POWERPC_EXCP_FP_VXSNAN:

                case POWERPC_EXCP_FP_VXISI:

                case POWERPC_EXCP_FP_VXIDI:

                case POWERPC_EXCP_FP_VXIMZ:

                case POWERPC_EXCP_FP_VXVC:

                case POWERPC_EXCP_FP_VXSQRT:

                case POWERPC_EXCP_FP_VXCVI:

                    info.si_code = FPE_FLTSUB;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown floating point exception (%02x)\n",

                              env->error_code);

                    break;

                }

                break;

            case POWERPC_EXCP_INVAL:

                EXCP_DUMP(env, "Invalid instruction\n");

                info.si_signo = SIGILL;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_INVAL_INVAL:

                    info.si_code = ILL_ILLOPC;

                    break;

                case POWERPC_EXCP_INVAL_LSWX:

                    info.si_code = ILL_ILLOPN;

                    break;

                case POWERPC_EXCP_INVAL_SPR:

                    info.si_code = ILL_PRVREG;

                    break;

                case POWERPC_EXCP_INVAL_FP:

                    info.si_code = ILL_COPROC;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",

                              env->error_code & 0xF);

                    info.si_code = ILL_ILLADR;

                    break;

                }

                /* Handle this via the gdb */

                gdb_handlesig (env, SIGSEGV);

                break;

            case POWERPC_EXCP_PRIV:

                EXCP_DUMP(env, "Privilege violation\n");

                info.si_signo = SIGILL;

                info.si_errno = 0;

                switch (env->error_code & 0xF) {

                case POWERPC_EXCP_PRIV_OPC:

                    info.si_code = ILL_PRVOPC;

                    break;

                case POWERPC_EXCP_PRIV_REG:

                    info.si_code = ILL_PRVREG;

                    break;

                default:

                    EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",

                              env->error_code & 0xF);

                    info.si_code = ILL_PRVOPC;

                    break;

                }

                break;

            case POWERPC_EXCP_TRAP:

                cpu_abort(env, "Tried to call a TRAP\n");

                break;

            default:

                /* Should not happen ! */

                cpu_abort(env, "Unknown program exception (%02x)\n",

                          env->error_code);

                break;

            }

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_FPU:      /* Floating-point unavailable exception  */

            EXCP_DUMP(env, "No floating point allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_SYSCALL:  /* System call exception                 */

            cpu_abort(env, "Syscall exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_APU:      /* Auxiliary processor unavailable       */

            EXCP_DUMP(env, "No APU instruction allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_DECR:     /* Decrementer exception                 */

            cpu_abort(env, "Decrementer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_FIT:      /* Fixed-interval timer interrupt        */

            cpu_abort(env, "Fix interval timer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_WDT:      /* Watchdog timer interrupt              */

            cpu_abort(env, "Watchdog timer interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DTLB:     /* Data TLB error                        */

            cpu_abort(env, "Data TLB exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ITLB:     /* Instruction TLB error                 */

            cpu_abort(env, "Instruction TLB exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_DEBUG:    /* Debug interrupt                       */

            gdb_handlesig (env, SIGTRAP);

            break;

#if defined(TARGET_PPCEMB)

        case POWERPC_EXCP_SPEU:     /* SPE/embedded floating-point unavail.  */

            EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_EFPDI:    /* Embedded floating-point data IRQ      */

            cpu_abort(env, "Embedded floating-point data IRQ not handled\n");

            break;

        case POWERPC_EXCP_EFPRI:    /* Embedded floating-point round IRQ     */

            cpu_abort(env, "Embedded floating-point round IRQ not handled\n");

            break;

        case POWERPC_EXCP_EPERFM:   /* Embedded performance monitor IRQ      */

            cpu_abort(env, "Performance monitor exception not handled\n");

            break;

        case POWERPC_EXCP_DOORI:    /* Embedded doorbell interrupt           */

            cpu_abort(env, "Doorbell interrupt while in user mode. "

                       "Aborting\n");

            break;

        case POWERPC_EXCP_DOORCI:   /* Embedded doorbell critical interrupt  */

            cpu_abort(env, "Doorbell critical interrupt while in user mode. "

                      "Aborting\n");

            break;

#endif /* defined(TARGET_PPCEMB) */

        case POWERPC_EXCP_RESET:    /* System reset exception                */

            cpu_abort(env, "Reset interrupt while in user mode. "

                      "Aborting\n");

            break;

#if defined(TARGET_PPC64) /* PowerPC 64 */

        case POWERPC_EXCP_DSEG:     /* Data segment exception                */

            cpu_abort(env, "Data segment exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_ISEG:     /* Instruction segment exception         */

            cpu_abort(env, "Instruction segment exception "

                      "while in user mode. Aborting\n");

            break;

#endif /* defined(TARGET_PPC64) */

#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */

        case POWERPC_EXCP_HDECR:    /* Hypervisor decrementer exception      */

            cpu_abort(env, "Hypervisor decrementer interrupt "

                      "while in user mode. Aborting\n");

            break;

#endif /* defined(TARGET_PPC64H) */

        case POWERPC_EXCP_TRACE:    /* Trace exception                       */

            /* Nothing to do:

             * we use this exception to emulate step-by-step execution mode.

             */

            break;

#if defined(TARGET_PPC64H) /* PowerPC 64 with hypervisor mode support */

        case POWERPC_EXCP_HDSI:     /* Hypervisor data storage exception     */

            cpu_abort(env, "Hypervisor data storage exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HISI:     /* Hypervisor instruction storage excp   */

            cpu_abort(env, "Hypervisor instruction storage exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HDSEG:    /* Hypervisor data segment exception     */

            cpu_abort(env, "Hypervisor data segment exception "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_HISEG:    /* Hypervisor instruction segment excp   */

            cpu_abort(env, "Hypervisor instruction segment exception "

                      "while in user mode. Aborting\n");

            break;

#endif /* defined(TARGET_PPC64H) */

        case POWERPC_EXCP_VPU:      /* Vector unavailable exception          */

            EXCP_DUMP(env, "No Altivec instructions allowed\n");

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_COPROC;

            info.si_addr = (void*)(env->nip - 4);

            queue_signal(info.si_signo, &info);

            break;

        case POWERPC_EXCP_PIT:      /* Programmable interval timer IRQ       */

            cpu_abort(env, "Programable interval timer interrupt "

                      "while in user mode. Aborting\n");

            break;

        case POWERPC_EXCP_IO:       /* IO error exception                    */

            cpu_abort(env, "IO error exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_RUNM:     /* Run mode exception                    */

            cpu_abort(env, "Run mode exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_EMUL:     /* Emulation trap exception              */

            cpu_abort(env, "Emulation trap exception not handled\n");

            break;

        case POWERPC_EXCP_IFTLB:    /* Instruction fetch TLB error           */

            cpu_abort(env, "Instruction fetch TLB exception "

                      "while in user-mode. Aborting");

            break;

        case POWERPC_EXCP_DLTLB:    /* Data load TLB miss                    */

            cpu_abort(env, "Data load TLB exception while in user-mode. "

                      "Aborting");

            break;

        case POWERPC_EXCP_DSTLB:    /* Data store TLB miss                   */

            cpu_abort(env, "Data store TLB exception while in user-mode. "

                      "Aborting");

            break;

        case POWERPC_EXCP_FPA:      /* Floating-point assist exception       */

            cpu_abort(env, "Floating-point assist exception not handled\n");

            break;

        case POWERPC_EXCP_IABR:     /* Instruction address breakpoint        */

            cpu_abort(env, "Instruction address breakpoint exception "

                      "not handled\n");

            break;

        case POWERPC_EXCP_SMI:      /* System management interrupt           */

            cpu_abort(env, "System management interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_THERM:    /* Thermal interrupt                     */

            cpu_abort(env, "Thermal interrupt interrupt while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_PERFM:    /* Embedded performance monitor IRQ      */

            cpu_abort(env, "Performance monitor exception not handled\n");

            break;

        case POWERPC_EXCP_VPUA:     /* Vector assist exception               */

            cpu_abort(env, "Vector assist exception not handled\n");

            break;

        case POWERPC_EXCP_SOFTP:    /* Soft patch exception                  */

            cpu_abort(env, "Soft patch exception not handled\n");

            break;

        case POWERPC_EXCP_MAINT:    /* Maintenance exception                 */

            cpu_abort(env, "Maintenance exception while in user mode. "

                      "Aborting\n");

            break;

        case POWERPC_EXCP_STOP:     /* stop translation                      */

            /* We did invalidate the instruction cache. Go on */

            break;

        case POWERPC_EXCP_BRANCH:   /* branch instruction:                   */

            /* We just stopped because of a branch. Go on */

            break;

        case POWERPC_EXCP_SYSCALL_USER:

            /* system call in user-mode emulation */

            /* system call */

            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)

                ret = do_unix_syscall(env, env->gpr[0]/*, env->gpr[3], env->gpr[4],

                                      env->gpr[5], env->gpr[6], env->gpr[7],

                                      env->gpr[8], env->gpr[9], env->gpr[10]*/);

            else if(((int)env->gpr[0])<0)

                ret = do_mach_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],

                                      env->gpr[5], env->gpr[6], env->gpr[7],

                                      env->gpr[8], env->gpr[9], env->gpr[10]);

            else

                ret = do_thread_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],

                                        env->gpr[5], env->gpr[6], env->gpr[7],

                                        env->gpr[8], env->gpr[9], env->gpr[10]);

            /* Unix syscall error signaling */

            if(((int)env->gpr[0]) <= SYS_MAXSYSCALL && ((int)env->gpr[0])>0)

            {

                if( (int)ret < 0 )

                    env->nip += 0;

                else

                    env->nip += 4;

            }

            /* Return value */

            env->gpr[3] = ret;

            break;

        case EXCP_INTERRUPT:

            /* just indicate that signals should be handled asap */

            break;

        default:

            cpu_abort(env, "Unknown exception 0x%d. Aborting\n", trapnr);

            break;

        }

        process_pending_signals(env);

    }

}

#endif

#ifdef TARGET_I386

/***********************************************************/

/* CPUX86 core interface */

uint64_t cpu_get_tsc(CPUX86State *env)

{

    return cpu_get_real_ticks();

}

void

write_dt(void *ptr, unsigned long addr, unsigned long limit,

                     int flags)

{

    unsigned int e1, e2;

    e1 = (addr << 16) | (limit & 0xffff);

    e2 = ((addr >> 16) & 0xff) | (addr & 0xff000000) | (limit & 0x000f0000);

    e2 |= flags;

    stl((uint8_t *)ptr, e1);

    stl((uint8_t *)ptr + 4, e2);

}

static void set_gate(void *ptr, unsigned int type, unsigned int dpl,

                     unsigned long addr, unsigned int sel)

{

    unsigned int e1, e2;

    e1 = (addr & 0xffff) | (sel << 16);

    e2 = (addr & 0xffff0000) | 0x8000 | (dpl << 13) | (type << 8);

    stl((uint8_t *)ptr, e1);

    stl((uint8_t *)ptr + 4, e2);

}

#define GDT_TABLE_SIZE 14

#define LDT_TABLE_SIZE 15

#define IDT_TABLE_SIZE 256

#define TSS_SIZE 104

uint64_t gdt_table[GDT_TABLE_SIZE];

uint64_t ldt_table[LDT_TABLE_SIZE];

uint64_t idt_table[IDT_TABLE_SIZE];

uint32_t tss[TSS_SIZE];

/* only dpl matters as we do only user space emulation */

static void set_idt(int n, unsigned int dpl)

{

    set_gate(idt_table + n, 0, dpl, 0, 0);

}

/* ABI convention: after a syscall if there was an error the CF flag is set */

static inline void set_error(CPUX86State *env, int ret)

{

    if(ret<0)

        env->eflags = env->eflags | 0x1;

    else

        env->eflags &= ~0x1;

    env->regs[R_EAX] = ret;

}

void cpu_loop(CPUX86State *env)

{

    int trapnr;

    int ret;

    uint8_t *pc;

    target_siginfo_t info;

    for(;;) {

        trapnr = cpu_x86_exec(env);

        uint32_t *params = (uint32_t *)env->regs[R_ESP];

        switch(trapnr) {

        case 0x79: /* Our commpage hack back door exit is here */

            do_commpage(env,  env->eip,   *(params + 1), *(params + 2),

                                          *(params + 3), *(params + 4),

                                          *(params + 5), *(params + 6),

                                          *(params + 7), *(params + 8));

            break;

        case 0x81: /* mach syscall */

        {

            ret = do_mach_syscall(env,  env->regs[R_EAX],

                                          *(params + 1), *(params + 2),

                                          *(params + 3), *(params + 4),

                                          *(params + 5), *(params + 6),

                                          *(params + 7), *(params + 8));

            set_error(env, ret);

            break;

        }

        case 0x90: /* unix backdoor */

        {

            /* after sysenter, stack is in R_ECX, new eip in R_EDX (sysexit will flip them back)*/

            int saved_stack = env->regs[R_ESP];

            env->regs[R_ESP] = env->regs[R_ECX];

            ret = do_unix_syscall(env, env->regs[R_EAX]);

            env->regs[R_ECX] = env->regs[R_ESP];

            env->regs[R_ESP] = saved_stack;

            set_error(env, ret);

            break;

        }

        case 0x80: /* unix syscall */

        {

            ret = do_unix_syscall(env, env->regs[R_EAX]/*,

                                          *(params + 1), *(params + 2),

                                          *(params + 3), *(params + 4),

                                          *(params + 5), *(params + 6),

                                          *(params + 7), *(params + 8)*/);

            set_error(env, ret);

            break;

        }

        case 0x82: /* thread syscall */

        {

            ret = do_thread_syscall(env,  env->regs[R_EAX],

                                          *(params + 1), *(params + 2),

                                          *(params + 3), *(params + 4),

                                          *(params + 5), *(params + 6),

                                          *(params + 7), *(params + 8));

            set_error(env, ret);

            break;

        }

        case EXCP0B_NOSEG:

        case EXCP0C_STACK:

            info.si_signo = SIGBUS;

            info.si_errno = 0;

            info.si_code = BUS_NOOP;

            info.si_addr = 0;

            gdb_handlesig (env, SIGBUS);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP0D_GPF:

            info.si_signo = SIGSEGV;

            info.si_errno = 0;

            info.si_code = SEGV_NOOP;

            info.si_addr = 0;

            gdb_handlesig (env, SIGSEGV);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP0E_PAGE:

            info.si_signo = SIGSEGV;

            info.si_errno = 0;

            if (!(env->error_code & 1))

                info.si_code = SEGV_MAPERR;

            else

                info.si_code = SEGV_ACCERR;

            info.si_addr = (void*)env->cr[2];

            gdb_handlesig (env, SIGSEGV);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP00_DIVZ:

            /* division by zero */

            info.si_signo = SIGFPE;

            info.si_errno = 0;

            info.si_code = FPE_INTDIV;

            info.si_addr = (void*)env->eip;

            gdb_handlesig (env, SIGFPE);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP01_SSTP:

        case EXCP03_INT3:

            info.si_signo = SIGTRAP;

            info.si_errno = 0;

            info.si_code = TRAP_BRKPT;

            info.si_addr = (void*)env->eip;

            gdb_handlesig (env, SIGTRAP);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP04_INTO:

        case EXCP05_BOUND:

            info.si_signo = SIGSEGV;

            info.si_errno = 0;

            info.si_code = SEGV_NOOP;

            info.si_addr = 0;

            gdb_handlesig (env, SIGSEGV);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP06_ILLOP:

            info.si_signo = SIGILL;

            info.si_errno = 0;

            info.si_code = ILL_ILLOPN;

            info.si_addr = (void*)env->eip;

            gdb_handlesig (env, SIGILL);

            queue_signal(info.si_signo, &info);

            break;

        case EXCP_INTERRUPT:

            /* just indicate that signals should be handled asap */

            break;

        case EXCP_DEBUG:

            {

                int sig;

                sig = gdb_handlesig (env, SIGTRAP);

                if (sig)

                  {

                    info.si_signo = sig;

                    info.si_errno = 0;

                    info.si_code = TRAP_BRKPT;

                    queue_signal(info.si_signo, &info);

                  }

            }

            break;

        default:

            pc = (void*)(env->segs[R_CS].base + env->eip);

            fprintf(stderr, "qemu: 0x%08lx: unhandled CPU exception 0x%x - aborting\n",

                    (long)pc, trapnr);

            abort();

        }

        process_pending_signals(env);

    }

}

#endif

void usage(void)

{

    printf("qemu-" TARGET_ARCH " version " QEMU_VERSION ", Copyright (c) 2003-2004 Fabrice Bellard\n"

           "usage: qemu-" TARGET_ARCH " [-h] [-d opts] [-L path] [-s size] program [arguments...]\n"

           "Darwin CPU emulator (compiled for %s emulation)\n"

           "\n"

           "-h           print this help\n"

           "-L path      set the %s library path (default='%s')\n"

           "-s size      set the stack size in bytes (default=%ld)\n"

           "\n"

           "debug options:\n"

           "-d options   activate log (logfile='%s')\n"

           "-g wait for gdb on port 1234\n"

           "-p pagesize  set the host page size to 'pagesize'\n",

           TARGET_ARCH,

           TARGET_ARCH,

           interp_prefix,

           stack_size,

           DEBUG_LOGFILE);

    _exit(1);

}

/* XXX: currently only used for async signals (see signal.c) */

CPUState *global_env;

/* used only if single thread */

CPUState *cpu_single_env = NULL;

/* used to free thread contexts */

TaskState *first_task_state;

int main(int argc, char **argv)

{

    const char *filename;

    struct target_pt_regs regs1, *regs = &regs1;

    TaskState ts1, *ts = &ts1;

    CPUState *env;

    int optind;

    short use_gdbstub = 0;

    const char *r;

    if (argc <= 1)

        usage();

    /* init debug */

    cpu_set_log_filename(DEBUG_LOGFILE);

    optind = 1;

    for(;;) {

        if (optind >= argc)

            break;

        r = argv[optind];

        if (r[0] != '-')

            break;

        optind++;

        r++;

        if (!strcmp(r, "-")) {

            break;

        } else if (!strcmp(r, "d")) {

            int mask;

            CPULogItem *item;

        if (optind >= argc)

        break;

        r = argv[optind++];

            mask = cpu_str_to_log_mask(r);

            if (!mask) {

                printf("Log items (comma separated):\n");

                for(item = cpu_log_items; item->mask != 0; item++) {

                    printf("%-10s %s\n", item->name, item->help);

                }

                exit(1);

            }

            cpu_set_log(mask);

        } else if (!strcmp(r, "s")) {

            r = argv[optind++];

            stack_size = strtol(r, (char **)&r, 0);

            if (stack_size <= 0)

                usage();

            if (*r == 'M')

                stack_size *= 1024 * 1024;

            else if (*r == 'k' || *r == 'K')

                stack_size *= 1024;

        } else if (!strcmp(r, "L")) {

            interp_prefix = argv[optind++];

        } else if (!strcmp(r, "p")) {

            qemu_host_page_size = atoi(argv[optind++]);

            if (qemu_host_page_size == 0 ||

                (qemu_host_page_size & (qemu_host_page_size - 1)) != 0) {

                fprintf(stderr, "page size must be a power of two\n");