C++ qemu_get_be64函数代码示例

static int rtc_load(QEMUFile *f, void *opaque, int version_id)
{
    RTCState *s = opaque;

    if (version_id != 1)
        return -EINVAL;

    qemu_get_buffer(f, s->cmos_data, 128);
    qemu_get_8s(f, &s->cmos_index);

    s->current_tm.tm_sec=qemu_get_be32(f);
    s->current_tm.tm_min=qemu_get_be32(f);
    s->current_tm.tm_hour=qemu_get_be32(f);
    s->current_tm.tm_wday=qemu_get_be32(f);
    s->current_tm.tm_mday=qemu_get_be32(f);
    s->current_tm.tm_mon=qemu_get_be32(f);
    s->current_tm.tm_year=qemu_get_be32(f);

    qemu_get_timer(f, s->periodic_timer);
    s->next_periodic_time=qemu_get_be64(f);

    s->next_second_time=qemu_get_be64(f);
    qemu_get_timer(f, s->second_timer);
    qemu_get_timer(f, s->second_timer2);
    return 0;
}

static int s390_storage_keys_load(QEMUFile *f, void *opaque, int version_id)
{
    S390SKeysState *ss = S390_SKEYS(opaque);
    S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
    int ret = 0;

    while (!ret) {
        ram_addr_t addr;
        int flags;

        addr = qemu_get_be64(f);
        flags = addr & ~TARGET_PAGE_MASK;
        addr &= TARGET_PAGE_MASK;

        switch (flags) {
        case S390_SKEYS_SAVE_FLAG_SKEYS: {
            const uint64_t total_count = qemu_get_be64(f);
            uint64_t handled_count = 0, cur_count;
            uint64_t cur_gfn = addr / TARGET_PAGE_SIZE;
            uint8_t *buf = g_try_malloc(S390_SKEYS_BUFFER_SIZE);

            if (!buf) {
                error_report("storage key load could not allocate memory\n");
                ret = -ENOMEM;
                break;
            }

            while (handled_count < total_count) {
                cur_count = MIN(total_count - handled_count,
                                S390_SKEYS_BUFFER_SIZE);
                qemu_get_buffer(f, buf, cur_count);

                ret = skeyclass->set_skeys(ss, cur_gfn, cur_count, buf);
                if (ret < 0) {
                    error_report("S390_SET_KEYS error %d\n", ret);
                    break;
                }
                handled_count += cur_count;
                cur_gfn += cur_count;
            }
            g_free(buf);
            break;
        }
        case S390_SKEYS_SAVE_FLAG_ERROR: {
            error_report("Storage key data is incomplete");
            ret = -EINVAL;
            break;
        }
        case S390_SKEYS_SAVE_FLAG_EOS:
            /* normal exit */
            return 0;
        default:
            error_report("Unexpected storage key flag data: %#x", flags);
            ret = -EINVAL;
        }
    }

    return ret;
}

static int cmma_load(QEMUFile *f, void *opaque, int version_id)
{
    S390StAttribState *sas = S390_STATTRIB(opaque);
    S390StAttribClass *sac = S390_STATTRIB_GET_CLASS(sas);
    uint64_t count, cur_gfn;
    int flags, ret = 0;
    ram_addr_t addr;
    uint8_t *buf;

    while (!ret) {
        addr = qemu_get_be64(f);
        flags = addr & ~TARGET_PAGE_MASK;
        addr &= TARGET_PAGE_MASK;

        switch (flags) {
        case STATTR_FLAG_MORE: {
            cur_gfn = addr / TARGET_PAGE_SIZE;
            count = qemu_get_be64(f);
            buf = g_try_malloc(count);
            if (!buf) {
                error_report("cmma_load could not allocate memory");
                ret = -ENOMEM;
                break;
            }

            qemu_get_buffer(f, buf, count);
            ret = sac->set_stattr(sas, cur_gfn, count, buf);
            if (ret < 0) {
                error_report("Error %d while setting storage attributes", ret);
            }
            g_free(buf);
            break;
        }
        case STATTR_FLAG_ERROR: {
            error_report("Storage attributes data is incomplete");
            ret = -EINVAL;
            break;
        }
        case STATTR_FLAG_DONE:
            /* This is after the last pre-copied value has been sent, nothing
             * more will be sent after this. Pre-copy has finished, and we
             * are done flushing all the remaining values. Now the target
             * system is about to take over. We synchronize the buffer to
             * apply the actual correct values where needed.
             */
             sac->synchronize(sas);
            break;
        case STATTR_FLAG_EOS:
            /* Normal exit */
            return 0;
        default:
            error_report("Unexpected storage attribute flag data: %#x", flags);
            ret = -EINVAL;
        }
    }

    return ret;
}

static int get_slbe(QEMUFile *f, void *pv, size_t size)
{
    ppc_slb_t *v = pv;

    v->esid = qemu_get_be64(f);
    v->vsid = qemu_get_be64(f);

    return 0;
}

static int get_avr(QEMUFile *f, void *pv, size_t size)
{
    ppc_avr_t *v = pv;

    v->u64[0] = qemu_get_be64(f);
    v->u64[1] = qemu_get_be64(f);

    return 0;
}

static int get_slbe(QEMUFile *f, void *pv, size_t size,
                    const VMStateField *field)
{
    ppc_slb_t *v = pv;

    v->esid = qemu_get_be64(f);
    v->vsid = qemu_get_be64(f);

    return 0;
}

static int get_avr(QEMUFile *f, void *pv, size_t size,
                   const VMStateField *field)
{
    ppc_avr_t *v = pv;

    v->u64[0] = qemu_get_be64(f);
    v->u64[1] = qemu_get_be64(f);

    return 0;
}

static int syborg_rtc_load(QEMUFile *f, void *opaque, int version_id)
{
    SyborgRTCState *s = opaque;

    if (version_id != 1)
        return -EINVAL;

    s->offset = qemu_get_be64(f);
    s->data = qemu_get_be64(f);

    return 0;
}

static int get_float64(QEMUFile *f, void *pv, size_t size)
{
    float64 *v = pv;

    *v = make_float64(qemu_get_be64(f));
    return 0;
}

/* This function is only used for old state version 1 and 2 */
static int apic_load_old(QEMUFile *f, void *opaque, int version_id)
{
    APICCommonState *s = opaque;
    APICCommonClass *info = APIC_COMMON_GET_CLASS(s);
    int i;

    if (version_id > 2) {
        return -EINVAL;
    }

    /* XXX: what if the base changes? (registered memory regions) */
    qemu_get_be32s(f, &s->apicbase);
    qemu_get_8s(f, &s->id);
    qemu_get_8s(f, &s->arb_id);
    qemu_get_8s(f, &s->tpr);
    qemu_get_be32s(f, &s->spurious_vec);
    qemu_get_8s(f, &s->log_dest);
    qemu_get_8s(f, &s->dest_mode);
    for (i = 0; i < 8; i++) {
        qemu_get_be32s(f, &s->isr[i]);
        qemu_get_be32s(f, &s->tmr[i]);
        qemu_get_be32s(f, &s->irr[i]);
    }
    for (i = 0; i < APIC_LVT_NB; i++) {
        qemu_get_be32s(f, &s->lvt[i]);
    }
    qemu_get_be32s(f, &s->esr);
    qemu_get_be32s(f, &s->icr[0]);
    qemu_get_be32s(f, &s->icr[1]);
    qemu_get_be32s(f, &s->divide_conf);
    s->count_shift = qemu_get_be32(f);
    qemu_get_be32s(f, &s->initial_count);
    s->initial_count_load_time = qemu_get_be64(f);
    s->next_time = qemu_get_be64(f);

    if (version_id >= 2) {
        s->timer_expiry = qemu_get_be64(f);
    }

    if (info->post_load) {
        info->post_load(s);
    }
    return 0;
}

void timer_get(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    expire_time = qemu_get_be64(f);
    if (expire_time != -1) {
        timer_mod_ns(ts, expire_time);
    } else {
        timer_del(ts);
    }
}

static int  goldfish_rtc_load(QEMUFile*  f, void*  opaque, int  version_id)
{
    struct  rtc_state*  s = opaque;

    if (version_id != GOLDFISH_RTC_SAVE_VERSION)
        return -1;

    /* this is an old value that is not correct. but that's ok anyway */
    s->now = qemu_get_be64(f);
    return 0;
}

void qemu_get_timer(QEMUFile *f, QEMUTimer *ts)
{
    uint64_t expire_time;

    expire_time = qemu_get_be64(f);
    if (expire_time != -1) {
        qemu_mod_timer_ns(ts, expire_time);
    } else {
        qemu_del_timer(ts);
    }
}

static int get_bitmap(QEMUFile *f, void *pv, size_t size)
{
    unsigned long *bmp = pv;
    int i, idx = 0;
    for (i = 0; i < BITS_TO_U64S(size); i++) {
        uint64_t w = qemu_get_be64(f);
        bmp[idx++] = w;
        if (sizeof(unsigned long) == 4 && idx < BITS_TO_LONGS(size)) {
            bmp[idx++] = w >> 32;
        }
    }

/**
 * Overwrites the contents of the disk image managed by this device with the
 * contents as they were at the point the snapshot was made.
 */
static int  nand_dev_load_disk_state(QEMUFile *f, nand_dev *dev)
{
#ifndef ANDROID_QCOW
    int buf_size = NAND_DEV_SAVE_DISK_BUF_SIZE;
    uint8_t buffer[NAND_DEV_SAVE_DISK_BUF_SIZE] = {0};
    int ret;

    /* File size for restore and truncate */
    uint64_t total_size = qemu_get_be64(f);
    if (total_size > dev->max_size) {
        XLOG("%s, restore failed: size required (%lld) exceeds device limit (%lld)\n",
             __FUNCTION__, total_size, dev->max_size);
        return -EIO;
    }

    /* overwrite disk contents with snapshot contents */
    uint64_t next_offset = 0;
    ret = do_lseek(dev->fd, 0, SEEK_SET);
    if (ret < 0) {
        XLOG("%s seek failed: %s\n", __FUNCTION__, strerror(errno));
        return -EIO;
    }
    while (next_offset < total_size) {
        /* snapshot buffer may not be an exact multiple of buf_size
         * if necessary, adjust buffer size for last copy operation */
        if (total_size - next_offset < buf_size) {
            buf_size = total_size - next_offset;
        }

        ret = qemu_get_buffer(f, buffer, buf_size);
        if (ret != buf_size) {
            XLOG("%s read failed: expected %d bytes but got %d\n",
                 __FUNCTION__, buf_size, ret);
            return -EIO;
        }
        ret = do_write(dev->fd, buffer, buf_size);
        if (ret != buf_size) {
            XLOG("%s, write failed: %s\n", __FUNCTION__, strerror(errno));
            return -EIO;
        }

        next_offset += buf_size;
    }

    ret = do_ftruncate(dev->fd, total_size);
    if (ret < 0) {
        XLOG("%s ftruncate failed: %s\n", __FUNCTION__, strerror(errno));
        return -EIO;
    }
#endif

    return 0;
}