C++ qemu_put_buffer函数代码示例

/* Saves a single BootProperty to file.
 */
static int
boot_property_save_property( QEMUFile  *f, BootProperty  *p )
{
    /* split in key and value, so we can re-use boot_property_add (and its
     * sanity checks) when loading
     */

    char *split = strchr(p->property, '=');
    if (split == NULL) {
        D("%s: save failed: illegal key/value pair \"%s\" (missing '=')\n",
          __FUNCTION__, p->property);
        qemu_file_set_error(f, -EINVAL);
        return -1;
    }

    *split = '\0';  /* p->property is now "<key>\0<value>\0" */

    uint32_t key_buf_len = (split - p->property) + 1; // +1: '\0' terminator
    qemu_put_be32(f, key_buf_len);
    qemu_put_buffer(f, (uint8_t*) p->property, key_buf_len);

    uint32_t value_buf_len = p->length - key_buf_len + 1; // +1: '\0' terminator
    qemu_put_be32(f, value_buf_len);
    qemu_put_buffer(f, (uint8_t*) split + 1, value_buf_len);

    *split = '=';  /* restore property to "<key>=<value>\0" */

    return 0;
}

static int
boot_property_save_property( QEMUFile  *f, BootProperty  *p )
{

    char *split = strchr(p->property, '=');
    if (split == NULL) {
        D("%s: save failed: illegal key/value pair \"%s\" (missing '=')\n",
          __FUNCTION__, p->property);
        qemu_file_set_error(f);
        return -1;
    }

    *split = '\0';  

    uint32_t key_buf_len = (split - p->property) + 1; 
    qemu_put_be32(f, key_buf_len);
    qemu_put_buffer(f, (uint8_t*) p->property, key_buf_len);

    uint32_t value_buf_len = p->length - key_buf_len + 1; 
    qemu_put_be32(f, value_buf_len);
    qemu_put_buffer(f, (uint8_t*) split + 1, value_buf_len);

    *split = '=';  

    return 0;
}

static void smc91c111_save(QEMUFile *f, void *opaque)
{
    smc91c111_state *s = opaque;

    qemu_put_be16(f, s->tcr);
    qemu_put_be16(f, s->rcr);
    qemu_put_be16(f, s->cr);
    qemu_put_be16(f, s->ctr);
    qemu_put_be16(f, s->gpr);
    qemu_put_be16(f, s->ptr);
    qemu_put_be16(f, s->ercv);

    qemu_put_be32(f, s->bank);
    qemu_put_be32(f, s->packet_num);

    qemu_put_be32(f, s->tx_alloc);
    qemu_put_be32(f, s->allocated);
    qemu_put_be32(f, s->tx_fifo_len);
    qemu_put_buffer(f, (uint8_t*) s->tx_fifo, sizeof(s->tx_fifo));
    qemu_put_be32(f, s->rx_fifo_len);
    qemu_put_buffer(f, (uint8_t*) s->rx_fifo, sizeof(s->rx_fifo));
    qemu_put_be32(f, s->tx_fifo_done_len);
    qemu_put_buffer(f, (uint8_t*) s->tx_fifo_done, sizeof(s->tx_fifo_done));

    
    qemu_put_buffer(f, (uint8_t*) s->data, sizeof(s->data));
    qemu_put_byte(f, s->int_level);
    qemu_put_byte(f, s->int_mask);

    
}

void msix_save(PCIDevice *dev, QEMUFile *f)
{
    unsigned n = dev->msix_entries_nr;

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

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

void msix_save(PCIDevice *dev, QEMUFile *f)
{
    unsigned n = dev->msix_entries_nr;

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

    qemu_put_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
    qemu_put_buffer(f, dev->msix_pba, (n + 7) / 8);
}

static void mipsnet_save(QEMUFile *f, void *opaque)
{
    MIPSnetState *s = opaque;

    qemu_put_be32s(f, &s->busy);
    qemu_put_be32s(f, &s->rx_count);
    qemu_put_be32s(f, &s->rx_read);
    qemu_put_be32s(f, &s->tx_count);
    qemu_put_be32s(f, &s->tx_written);
    qemu_put_be32s(f, &s->intctl);
    qemu_put_buffer(f, s->rx_buffer, MAX_ETH_FRAME_SIZE);
    qemu_put_buffer(f, s->tx_buffer, MAX_ETH_FRAME_SIZE);
}

static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s)
{
    qemu_put_be32s(f, &s->irq);
    qemu_put_be32s(f, &s->reg);
    qemu_put_be32s(f, &s->rxint);
    qemu_put_be32s(f, &s->txint);
    qemu_put_be32s(f, &s->rxint_under_svc);
    qemu_put_be32s(f, &s->txint_under_svc);
    qemu_put_8s(f, &s->rx);
    qemu_put_8s(f, &s->tx);
    qemu_put_buffer(f, s->wregs, 16);
    qemu_put_buffer(f, s->rregs, 16);
}

static void tcx_save(QEMUFile *f, void *opaque)
{
    TCXState *s = opaque;

    qemu_put_be16s(f, &s->height);
    qemu_put_be16s(f, &s->width);
    qemu_put_be16s(f, &s->depth);
    qemu_put_buffer(f, s->r, 256);
    qemu_put_buffer(f, s->g, 256);
    qemu_put_buffer(f, s->b, 256);
    qemu_put_8s(f, &s->dac_index);
    qemu_put_8s(f, &s->dac_state);
}

static void slavio_serial_save_chn(QEMUFile *f, ChannelState *s)
{
    int tmp;
    tmp = 0;
    qemu_put_be32s(f, &tmp); /* unused, was IRQ.  */
    qemu_put_be32s(f, &s->reg);
    qemu_put_be32s(f, &s->rxint);
    qemu_put_be32s(f, &s->txint);
    qemu_put_be32s(f, &s->rxint_under_svc);
    qemu_put_be32s(f, &s->txint_under_svc);
    qemu_put_8s(f, &s->rx);
    qemu_put_8s(f, &s->tx);
    qemu_put_buffer(f, s->wregs, SERIAL_REGS);
    qemu_put_buffer(f, s->rregs, SERIAL_REGS);
}

static int save_xbzrle_page(QEMUFile *f, uint8_t **current_data,
                            ram_addr_t current_addr, RAMBlock *block,
                            ram_addr_t offset, int cont, bool last_stage)
{
    int encoded_len = 0, bytes_sent = -1;
    uint8_t *prev_cached_page;

    if (!cache_is_cached(XBZRLE.cache, current_addr)) {
        acct_info.xbzrle_cache_miss++;
        if (!last_stage) {
            if (cache_insert(XBZRLE.cache, current_addr, *current_data) == -1) {
                return -1;
            } else {
                /* update *current_data when the page has been
                   inserted into cache */
                *current_data = get_cached_data(XBZRLE.cache, current_addr);
            }
        }
        return -1;
    }

    prev_cached_page = get_cached_data(XBZRLE.cache, current_addr);

    /* save current buffer into memory */
    memcpy(XBZRLE.current_buf, *current_data, TARGET_PAGE_SIZE);

    /* XBZRLE encoding (if there is no overflow) */
    encoded_len = xbzrle_encode_buffer(prev_cached_page, XBZRLE.current_buf,
                                       TARGET_PAGE_SIZE, XBZRLE.encoded_buf,
                                       TARGET_PAGE_SIZE);
    if (encoded_len == 0) {
        DPRINTF("Skipping unmodified page\n");
        return 0;
    } else if (encoded_len == -1) {
        DPRINTF("Overflow\n");
        acct_info.xbzrle_overflows++;
        /* update data in the cache */
        if (!last_stage) {
            memcpy(prev_cached_page, *current_data, TARGET_PAGE_SIZE);
            *current_data = prev_cached_page;
        }
        return -1;
    }

    /* we need to update the data in the cache, in order to get the same data */
    if (!last_stage) {
        memcpy(prev_cached_page, XBZRLE.current_buf, TARGET_PAGE_SIZE);
    }

    /* Send XBZRLE based compressed page */
    bytes_sent = save_block_hdr(f, block, offset, cont, RAM_SAVE_FLAG_XBZRLE);
    qemu_put_byte(f, ENCODING_FLAG_XBZRLE);
    qemu_put_be16(f, encoded_len);
    qemu_put_buffer(f, XBZRLE.encoded_buf, encoded_len);
    bytes_sent += encoded_len + 1 + 2;
    acct_info.xbzrle_pages++;
    acct_info.xbzrle_bytes += bytes_sent;

    return bytes_sent;
}

static int put_buffer(QEMUFile *f, void *pv, size_t size, VMStateField *field,
                      QJSON *vmdesc)
{
    uint8_t *v = pv;
    qemu_put_buffer(f, v, size);
    return 0;
}

static int ram_save_block(QEMUFile *f)
{
    static ram_addr_t current_addr = 0;
    ram_addr_t saved_addr = current_addr;
    ram_addr_t addr = 0;
    int found = 0;

    while (addr < last_ram_offset) {
        if (cpu_physical_memory_get_dirty(current_addr, MIGRATION_DIRTY_FLAG)) {
            uint8_t *p;

            cpu_physical_memory_reset_dirty(current_addr,
                                            current_addr + TARGET_PAGE_SIZE,
                                            MIGRATION_DIRTY_FLAG);

            p = qemu_get_ram_ptr(current_addr);

            if (is_dup_page(p, *p)) {
                qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_COMPRESS);
                qemu_put_byte(f, *p);
            } else {
                qemu_put_be64(f, current_addr | RAM_SAVE_FLAG_PAGE);
                qemu_put_buffer(f, p, TARGET_PAGE_SIZE);
            }

            found = 1;
            break;
        }
        addr += TARGET_PAGE_SIZE;
        current_addr = (saved_addr + addr) % last_ram_offset;
    }

    return found;
}

/* 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;
}

void virtio_save(VirtIODevice *vdev, QEMUFile *f)
{
    int i;

    if (vdev->binding->save_config)
        vdev->binding->save_config(vdev->binding_opaque, f);

    qemu_put_8s(f, &vdev->status);
    qemu_put_8s(f, &vdev->isr);
    qemu_put_be16s(f, &vdev->queue_sel);
    qemu_put_be32s(f, &vdev->guest_features);
    qemu_put_be32(f, vdev->config_len);
    qemu_put_buffer(f, vdev->config, vdev->config_len);

    for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
        if (vdev->vq[i].vring.num == 0)
            break;
    }

    qemu_put_be32(f, i);

    for (i = 0; i < VIRTIO_PCI_QUEUE_MAX; i++) {
        if (vdev->vq[i].vring.num == 0)
            break;

        qemu_put_be32(f, vdev->vq[i].vring.num);
        qemu_put_be64(f, vdev->vq[i].pa);
        qemu_put_be16s(f, &vdev->vq[i].last_avail_idx);
        if (vdev->binding->save_queue)
            vdev->binding->save_queue(vdev->binding_opaque, i, f);
    }
}

static void wav_capture (void *opaque, void *buf, int size)
{
    WAVState *wav = opaque;

    qemu_put_buffer (wav->f, buf, size);
    wav->bytes += size;
}