main.c.svn-base

我们自己开发的一个OSEK操作系统！不知道可不可以？

    target_siginfo_t info;
    int trapnr;
    uint32_t ret;

    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                */
            EXCP_DUMP(env, "Invalid data memory access: 0x" ADDRX "\n",
                      env->spr[SPR_DAR]);
            /* XXX: check this. Seems bugged */
            switch (env->error_code & 0xFF000000) {
            case 0x40000000:
                info.si_signo = TARGET_SIGSEGV;
                info.si_errno = 0;
                info.si_code = TARGET_SEGV_MAPERR;
                break;
            case 0x04000000:
                info.si_signo = TARGET_SIGILL;
                info.si_errno = 0;
                info.si_code = TARGET_ILL_ILLADR;
                break;
            case 0x08000000:
                info.si_signo = TARGET_SIGSEGV;
                info.si_errno = 0;
                info.si_code = TARGET_SEGV_ACCERR;
                break;
            default:
                /* Let's send a regular segfault... */
                EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
                          env->error_code);
                info.si_signo = TARGET_SIGSEGV;
                info.si_errno = 0;
                info.si_code = TARGET_SEGV_MAPERR;
                break;
            }
            info._sifields._sigfault._addr = 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_SRR0]);
            /* XXX: check this */
            switch (env->error_code & 0xFF000000) {
            case 0x40000000:
                info.si_signo = TARGET_SIGSEGV;
            info.si_errno = 0;
                info.si_code = TARGET_SEGV_MAPERR;
                break;
            case 0x10000000:
            case 0x08000000:
                info.si_signo = TARGET_SIGSEGV;
                info.si_errno = 0;
                info.si_code = TARGET_SEGV_ACCERR;
                break;
            default:
                /* Let's send a regular segfault... */
                EXCP_DUMP(env, "Invalid segfault errno (%02x)\n",
                          env->error_code);
                info.si_signo = TARGET_SIGSEGV;
                info.si_errno = 0;
                info.si_code = TARGET_SEGV_MAPERR;
                break;
            }
            info._sifields._sigfault._addr = 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");
            /* XXX: check this */
            info.si_signo = TARGET_SIGBUS;
            info.si_errno = 0;
            info.si_code = TARGET_BUS_ADRALN;
            info._sifields._sigfault._addr = 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");
                info.si_signo = TARGET_SIGFPE;
                info.si_errno = 0;
                switch (env->error_code & 0xF) {
                case POWERPC_EXCP_FP_OX:
                    info.si_code = TARGET_FPE_FLTOVF;
                    break;
                case POWERPC_EXCP_FP_UX:
                    info.si_code = TARGET_FPE_FLTUND;
                    break;
                case POWERPC_EXCP_FP_ZX:
                case POWERPC_EXCP_FP_VXZDZ:
                    info.si_code = TARGET_FPE_FLTDIV;
                    break;
                case POWERPC_EXCP_FP_XX:
                    info.si_code = TARGET_FPE_FLTRES;
                    break;
                case POWERPC_EXCP_FP_VXSOFT:
                    info.si_code = TARGET_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 = TARGET_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 = TARGET_SIGILL;
                info.si_errno = 0;
                switch (env->error_code & 0xF) {
                case POWERPC_EXCP_INVAL_INVAL:
                    info.si_code = TARGET_ILL_ILLOPC;
                    break;
                case POWERPC_EXCP_INVAL_LSWX:
                    info.si_code = TARGET_ILL_ILLOPN;
                    break;
                case POWERPC_EXCP_INVAL_SPR:
                    info.si_code = TARGET_ILL_PRVREG;
                    break;
                case POWERPC_EXCP_INVAL_FP:
                    info.si_code = TARGET_ILL_COPROC;
                    break;
                default:
                    EXCP_DUMP(env, "Unknown invalid operation (%02x)\n",
                              env->error_code & 0xF);
                    info.si_code = TARGET_ILL_ILLADR;
                    break;
                }
                break;
            case POWERPC_EXCP_PRIV:
                EXCP_DUMP(env, "Privilege violation\n");
                info.si_signo = TARGET_SIGILL;
                info.si_errno = 0;
                switch (env->error_code & 0xF) {
                case POWERPC_EXCP_PRIV_OPC:
                    info.si_code = TARGET_ILL_PRVOPC;
                    break;
                case POWERPC_EXCP_PRIV_REG:
                    info.si_code = TARGET_ILL_PRVREG;
                    break;
                default:
                    EXCP_DUMP(env, "Unknown privilege violation (%02x)\n",
                              env->error_code & 0xF);
                    info.si_code = TARGET_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._sifields._sigfault._addr = 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 = TARGET_SIGILL;
            info.si_errno = 0;
            info.si_code = TARGET_ILL_COPROC;
            info._sifields._sigfault._addr = 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 = TARGET_SIGILL;
            info.si_errno = 0;
            info.si_code = TARGET_ILL_COPROC;
            info._sifields._sigfault._addr = 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                       */
            /* XXX: check this */
            {
                int sig;

                sig = gdb_handlesig(env, TARGET_SIGTRAP);
                if (sig) {
                    info.si_signo = sig;
                    info.si_errno = 0;
                    info.si_code = TARGET_TRAP_BRKPT;
                    queue_signal(info.si_signo, &info);
                  }
            }
            break;
        case POWERPC_EXCP_SPEU:     /* SPE/embedded floating-point unavail.  */
            EXCP_DUMP(env, "No SPE/floating-point instruction allowed\n");
            info.si_signo = TARGET_SIGILL;
            info.si_errno = 0;
            info.si_code = TARGET_ILL_COPROC;
            info._sifields._sigfault._addr = 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;
        case POWERPC_EXCP_RESET:    /* System reset exception                */
            cpu_abort(env, "Reset interrupt while in user mode. "
                      "Aborting\n");
            break;
        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;
        /* 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;
        case POWERPC_EXCP_TRACE:    /* Trace exception                       */
            /* Nothing to do:
             * we use this exception to emulate step-by-step execution mode.
             */
            break;
        /* 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;
        case POWERPC_EXCP_VPU:      /* Vector unavailable exception          */
            EXCP_DUMP(env, "No Altivec instructions allowed\n");
            info.si_signo = TARGET_SIGILL;
            info.si_errno = 0;
            info.si_code = TARGET_ILL_COPROC;
            info._sifields._sigfault._addr = 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 */
            /* WARNING:
             * PPC ABI uses overflow flag in cr0 to signal an error
             * in syscalls.
             */
#if 0
            printf("syscall %d 0x%08x 0x%08x 0x%08x 0x%08x\n", env->gpr[0],
                   env->gpr[3], env->gpr[4], env->gpr[5], env->gpr[6]);
#endif
            env->crf[0] &= ~0x1;
            ret = do_syscall(env, env->gpr[0], env->gpr[3], env->gpr[4],
                             env->gpr[5], env->gpr[6], env->gpr[7],
                             env->gpr[8]);
            if (ret > (uint32_t)(-515)) {
                env->crf[0] |= 0x1;
                ret = -ret;
            }
            env->gpr[3] = ret;
#if 0