C++ (Cpp) etb_dump示例

示例#1

文件： coresight-etb.c 项目： Adrioid83/jflte_xxx

static ssize_t etb_read(struct file *file, char __user *data,
				size_t len, loff_t *ppos)
{
	struct etb_drvdata *drvdata = container_of(file->private_data,
						   struct etb_drvdata, miscdev);

	if (drvdata->reading == false) {
		etb_dump(drvdata);
		drvdata->reading = true;
	}

	if (*ppos + len > ETB_SIZE_WORDS * BYTES_PER_WORD)
		len = ETB_SIZE_WORDS * BYTES_PER_WORD - *ppos;

	if (copy_to_user(data, drvdata->buf + *ppos, len)) {
		dev_dbg(drvdata->dev, "%s: copy_to_user failed\n", __func__);
		return -EFAULT;
	}

	*ppos += len;

	dev_dbg(drvdata->dev, "%s: %d bytes copied, %d bytes left\n",
		__func__, len, (int) (ETB_SIZE_WORDS * BYTES_PER_WORD - *ppos));
	return len;
}

示例#2

文件： qdss-etb.c 项目： Bigtime1267/HTC-C525c

static ssize_t etb_read(struct file *file, char __user *data,
				size_t len, loff_t *ppos)
{
	if (etb.reading == false) {
		etb_dump();
		etb.reading = true;
	}

	if (*ppos + len > ETB_SIZE_WORDS * BYTES_PER_WORD)
		len = ETB_SIZE_WORDS * BYTES_PER_WORD - *ppos;

	if (copy_to_user(data, etb.buf + *ppos, len)) {
		dev_dbg(etb.dev, "%s: copy_to_user failed\n", __func__);
		return -EFAULT;
	}

	*ppos += len;

	dev_dbg(etb.dev, "%s: %d bytes copied, %d bytes left\n",
		__func__, len, (int) (ETB_SIZE_WORDS * BYTES_PER_WORD - *ppos));

	return len;
}

示例#3

文件： coresight-etb10.c 项目： SantoshShilimkar/linux

static ssize_t etb_read(struct file *file, char __user *data,
				size_t len, loff_t *ppos)
{
	u32 depth;
	struct etb_drvdata *drvdata = container_of(file->private_data,
						   struct etb_drvdata, miscdev);

	etb_dump(drvdata);

	depth = drvdata->buffer_depth;
	if (*ppos + len > depth * 4)
		len = depth * 4 - *ppos;

	if (copy_to_user(data, drvdata->buf + *ppos, len)) {
		dev_dbg(drvdata->dev, "%s: copy_to_user failed\n", __func__);
		return -EFAULT;
	}

	*ppos += len;

	dev_dbg(drvdata->dev, "%s: %zu bytes copied, %d bytes left\n",
		__func__, len, (int)(depth * 4 - *ppos));
	return len;
}