C++ (Cpp) _mali_ukk_dump_mmu_page_table示例

示例#1

文件： mali_ukk_mem.c 项目： Andro-Boy/Googy-Max2-Kernel

int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mali_uk_dump_mmu_page_table_s __user * uargs)
{
    _mali_uk_dump_mmu_page_table_s kargs;
    _mali_osk_errcode_t err;
    void *buffer;
    int rc = -EFAULT;

	/* validate input */
    MALI_CHECK_NON_NULL(uargs, -EINVAL);
	/* the session_data pointer was validated by caller */

    kargs.buffer = NULL;

    /* get location of user buffer */
	if (0 != get_user(buffer, &uargs->buffer)) goto err_exit;
	/* get size of mmu page table info buffer from user space */
	if ( 0 != get_user(kargs.size, &uargs->size) ) goto err_exit;
    /* verify we can access the whole of the user buffer */
    if (!access_ok(VERIFY_WRITE, buffer, kargs.size)) goto err_exit;

    /* allocate temporary buffer (kernel side) to store mmu page table info */
    MALI_CHECK(kargs.size > 0, -ENOMEM);
    kargs.buffer = _mali_osk_valloc(kargs.size);
    if (NULL == kargs.buffer)
    {
        rc = -ENOMEM;
        goto err_exit;
    }

    kargs.ctx = session_data;
    err = _mali_ukk_dump_mmu_page_table(&kargs);
    if (_MALI_OSK_ERR_OK != err)
    {
        rc = map_errcode(err);
        goto err_exit;
    }

    /* copy mmu page table info back to user space and update pointers */
	if (0 != copy_to_user(uargs->buffer, kargs.buffer, kargs.size) ) goto err_exit;
    if (0 != put_user((kargs.register_writes - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->register_writes)) goto err_exit;
    if (0 != put_user((kargs.page_table_dump - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->page_table_dump)) goto err_exit;
    if (0 != put_user(kargs.register_writes_size, &uargs->register_writes_size)) goto err_exit;
    if (0 != put_user(kargs.page_table_dump_size, &uargs->page_table_dump_size)) goto err_exit;
    rc = 0;

err_exit:
    if (kargs.buffer) _mali_osk_vfree(kargs.buffer);
    return rc;
}

示例#2

int mem_dump_mmu_page_table_wrapper(struct mali_session_data *session_data, _mali_uk_dump_mmu_page_table_s __user * uargs)
{
    _mali_uk_dump_mmu_page_table_s kargs;
    _mali_osk_errcode_t err;
    void *buffer;
    int rc = -EFAULT;

	
    MALI_CHECK_NON_NULL(uargs, -EINVAL);
	

    kargs.buffer = NULL;

    
	if (0 != get_user(buffer, &uargs->buffer)) goto err_exit;
	
	if ( 0 != get_user(kargs.size, &uargs->size) ) goto err_exit;
    
    if (!access_ok(VERIFY_WRITE, buffer, kargs.size)) goto err_exit;

    
    kargs.buffer = _mali_osk_valloc(kargs.size);
    if (NULL == kargs.buffer)
    {
        rc = -ENOMEM;
        goto err_exit;
    }

    kargs.ctx = session_data;
    err = _mali_ukk_dump_mmu_page_table(&kargs);
    if (_MALI_OSK_ERR_OK != err)
    {
        rc = map_errcode(err);
        goto err_exit;
    }

    
	if (0 != copy_to_user(uargs->buffer, kargs.buffer, kargs.size) ) goto err_exit;
    if (0 != put_user((kargs.register_writes - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->register_writes)) goto err_exit;
    if (0 != put_user((kargs.page_table_dump - (u32 *)kargs.buffer) + (u32 *)uargs->buffer, &uargs->page_table_dump)) goto err_exit;
    if (0 != put_user(kargs.register_writes_size, &uargs->register_writes_size)) goto err_exit;
    if (0 != put_user(kargs.page_table_dump_size, &uargs->page_table_dump_size)) goto err_exit;
    rc = 0;

err_exit:
    if (kargs.buffer) _mali_osk_vfree(kargs.buffer);
    return rc;
}