C++ qemu_get_buffer函数代码示例

static int tcx_load(QEMUFile *f, void *opaque, int version_id)
{
    TCXState *s = opaque;
    uint32_t dummy;

    if (version_id != 3 && version_id != 4)
        return -EINVAL;

    if (version_id == 3) {
        qemu_get_be32s(f, &dummy);
        qemu_get_be32s(f, &dummy);
        qemu_get_be32s(f, &dummy);
    }
    qemu_get_be16s(f, &s->height);
    qemu_get_be16s(f, &s->width);
    qemu_get_be16s(f, &s->depth);
    qemu_get_buffer(f, s->r, 256);
    qemu_get_buffer(f, s->g, 256);
    qemu_get_buffer(f, s->b, 256);
    qemu_get_8s(f, &s->dac_index);
    qemu_get_8s(f, &s->dac_state);
    update_palette_entries(s, 0, 256);
    if (s->depth == 24)
        tcx24_invalidate_display(s);
    else
        tcx_invalidate_display(s);

    return 0;
}

static int smc91c111_load(QEMUFile *f, void *opaque, int version_id)
{
    smc91c111_state *s = opaque;

    if (version_id != SMC91C111_SAVE_VERSION) {
        return -1;
    }

    s->tcr = qemu_get_be16(f);
    s->rcr = qemu_get_be16(f);
    s->cr = qemu_get_be16(f);
    s->ctr = qemu_get_be16(f);
    s->gpr = qemu_get_be16(f);
    s->ptr = qemu_get_be16(f);
    s->ercv = qemu_get_be16(f);

    s->bank = qemu_get_be32(f);
    s->packet_num = qemu_get_be32(f);

    s->tx_alloc = qemu_get_be32(f);
    s->allocated = qemu_get_be32(f);
    s->tx_fifo_len = qemu_get_be32(f);
    qemu_get_buffer(f, (uint8_t*) s->tx_fifo, sizeof(s->tx_fifo));
    s->rx_fifo_len = qemu_get_be32(f);
    qemu_get_buffer(f, (uint8_t*) s->rx_fifo, sizeof(s->rx_fifo));
    s->tx_fifo_done_len = qemu_get_be32(f);
    qemu_get_buffer(f, (uint8_t*) s->tx_fifo_done, sizeof(s->tx_fifo_done));

    /* Packet buffer memory.  */
    qemu_get_buffer(f, (uint8_t*) s->data, sizeof(s->data));
    s->int_level = qemu_get_byte(f);
    s->int_mask = qemu_get_byte(f);

    return 0;
}

/* Should be called after restoring the config space. */
void msix_load(PCIDevice *dev, QEMUFile *f)
{
    unsigned n = dev->msix_entries_nr;

    if (!(dev->cap_present & QEMU_PCI_CAP_MSIX)) {
        return;
    }

    msix_free_irq_entries(dev);
    qemu_get_buffer(f, dev->msix_table_page, n * MSIX_ENTRY_SIZE);
    qemu_get_buffer(f, dev->msix_table_page + MSIX_PAGE_PENDING, (n + 7) / 8);
}

static int get_buffer(QEMUFile *f, void *pv, size_t size,
                      VMStateField *field)
{
    uint8_t *v = pv;
    qemu_get_buffer(f, v, size);
    return 0;
}

/* Initialisation routine */
void *ds1225y_init(target_phys_addr_t mem_base, const char *filename)
{
    ds1225y_t *s;
    int mem_indexRW, mem_indexRP;
    QEMUFile *file;

    s = qemu_mallocz(sizeof(ds1225y_t));
    s->chip_size = 0x2000; /* Fixed for ds1225y chip: 8 KiB */
    s->contents = qemu_mallocz(s->chip_size);
    s->protection = 7;

    /* Read current file */
    file = qemu_fopen(filename, "rb");
    if (file) {
        /* Read nvram contents */
        qemu_get_buffer(file, s->contents, s->chip_size);
        qemu_fclose(file);
    }
    s->file = qemu_fopen(filename, "wb");
    if (s->file) {
        /* Write back contents, as 'wb' mode cleaned the file */
        qemu_put_buffer(s->file, s->contents, s->chip_size);
        qemu_fflush(s->file);
    }

    /* Read/write memory */
    mem_indexRW = cpu_register_io_memory(nvram_read, nvram_write, s);
    cpu_register_physical_memory(mem_base, s->chip_size, mem_indexRW);
    /* Read/write protected memory */
    mem_indexRP = cpu_register_io_memory(nvram_read, nvram_write_protected, s);
    cpu_register_physical_memory(mem_base + s->chip_size, s->chip_size, mem_indexRP);
    return s;
}

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 virtio_blk_load(QEMUFile *f, void *opaque, int version_id)
{
    VirtIOBlock *s = opaque;
    int ret;

    if (version_id != 2)
        return -EINVAL;

    ret = virtio_load(&s->vdev, f);
    if (ret) {
        return ret;
    }

    while (qemu_get_sbyte(f)) {
        VirtIOBlockReq *req = virtio_blk_alloc_request(s);
        qemu_get_buffer(f, (unsigned char*)&req->elem, sizeof(req->elem));
        req->next = s->rq;
        s->rq = req;

        virtqueue_map_sg(req->elem.in_sg, req->elem.in_addr,
            req->elem.in_num, 1);
        virtqueue_map_sg(req->elem.out_sg, req->elem.out_addr,
            req->elem.out_num, 0);
    }

    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 void ps2_common_load (QEMUFile *f, PS2State *s)
{
    qemu_get_be32s (f, &s->write_cmd);
    qemu_get_be32s (f, &s->queue.rptr);
    qemu_get_be32s (f, &s->queue.wptr);
    qemu_get_be32s (f, &s->queue.count);
    qemu_get_buffer (f, s->queue.data, sizeof (s->queue.data));
}

static void ps2_common_load (QEMUFile *f, PS2State *s)
{
    s->write_cmd=qemu_get_be32 (f);
    s->queue.rptr=qemu_get_be32 (f);
    s->queue.wptr=qemu_get_be32 (f);
    s->queue.count=qemu_get_be32 (f);
    qemu_get_buffer (f, s->queue.data, sizeof (s->queue.data));
}

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;
}

/* Should be called after restoring the config space. */
void msix_load(PCIDevice *dev, QEMUFile *f)
{
    unsigned n = dev->msix_entries_nr;
    unsigned int vector;

    if (!msix_present(dev)) {
        return;
    }

    msix_clear_all_vectors(dev);
    qemu_get_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
    qemu_get_buffer(f, dev->msix_pba, (n + 7) / 8);
    msix_update_function_masked(dev);

    for (vector = 0; vector < n; vector++) {
        msix_handle_mask_update(dev, vector, true);
    }
}

static void
goldfish_audio_buff_get( struct goldfish_audio_buff*  b, QEMUFile*  f )
{
    b->address = qemu_get_be32(f);
    b->length  = qemu_get_be32(f);
    b->offset  = qemu_get_be32(f);
    goldfish_audio_buff_ensure(b, b->length);
    qemu_get_buffer(f, b->data, b->length);
}

static int mipsnet_load(QEMUFile *f, void *opaque, int version_id)
{
    MIPSnetState *s = opaque;

    if (version_id > 0)
        return -EINVAL;

    qemu_get_be32s(f, &s->busy);
    qemu_get_be32s(f, &s->rx_count);
    qemu_get_be32s(f, &s->rx_read);
    qemu_get_be32s(f, &s->tx_count);
    qemu_get_be32s(f, &s->tx_written);
    qemu_get_be32s(f, &s->intctl);
    qemu_get_buffer(f, s->rx_buffer, MAX_ETH_FRAME_SIZE);
    qemu_get_buffer(f, s->tx_buffer, MAX_ETH_FRAME_SIZE);

    return 0;
}

static void scsi_generic_load_request(QEMUFile *f, SCSIRequest *req)
{
    SCSIGenericReq *r = DO_UPCAST(SCSIGenericReq, req, req);

    qemu_get_sbe32s(f, &r->buflen);
    if (r->buflen && r->req.cmd.mode == SCSI_XFER_TO_DEV) {
        assert(!r->req.sg);
        qemu_get_buffer(f, r->buf, r->req.cmd.xfer);
    }
}