Ioctl put_user
What is interesting about timeline->fences … Web30 mrt. 2009 · MTD: New ioctl calls for >4GiB device support Extend the MTD user ABI to access >4GiB devices using 64-bit offsets. New ioctls: MEMGETINFO64 MEMERASE64 MEMWRITEOOB64 MEMREADOOB64 MEMLOCK64 MEMUNLOCK64 MEMGETREGIONINFO64 Compat ioctls: MEMWRITEOOB64_32 …
Ioctl put_user
Did you know?
Web3 jan. 2013 · put_user用于将内核空间的一个简单类型变量x拷贝到p所指向的用户空间。 该函数可以自动判断变量的类型,如果执行成功则返回0,否则返回-EFAULT。 下面给出 … Web1 sep. 2024 · When running a 32-bit process on a 64-bit kernel with 32-bit compatibility support, the 32-bit process will be calling ioctl () with the 32-bit version of the …
Web27 mrt. 2005 · 今回は、ユーザプロセスから発行される ioctl システムコールに対応してみます。 ioctl は、read や write で行うことが適当でない、デバイスの設定を変えたりする場合に良く使われます。 ここでは、 poll.c を改造して ioctl システムコールに対応させてみましょう。 サンプルプログラム サンプルプログラムの説明 サンプルプログラム ioctl シ … WebThe ioctl() system call manipulates the underlying device parameters of special files. In particular, many operating characteristics of character special files (e.g., terminals) may …
Web3 jan. 2024 · * This ioctl may fail with ENODEV in case the file is revoked, EFAULT * if the receive-buffer points to invalid memory, or EINVAL if the kernel * does not implement the ioctl. */ #define EVIOCGMASK _IOR('E', 0x92, struct input_mask) /* Get event-masks */ /** * EVIOCSMASK - Set event mask * * This ioctl is the counterpart to EVIOCGMASK. … WebIn order to support 32-bit user space running on a 64-bit machine, each subsystem or driver that implements an ioctl callback handler must also implement the corresponding compat_ioctl handler. As long as all the rules for data structures are followed, this is as easy as setting the .compat_ioctl pointer to a helper function such as compat_ptr_ioctl() or …
Web12 apr. 2024 · The ioctl IOCTL_KGSL_TIMELINE_FENCE_GET and IOCTL_KGSL_TIMELINE_WAIT can be used to add dma_fence objects to this list. The dma_fence objects added are refcounted objects and their refcounts are decreased using the standard dma_fence_put method.
Web1 nov. 2024 · ioctl 是设备驱动程序中设备控制接口函数,一个字符设备驱动通常会实现设备打开、关闭、读、写等功能,在一些需要细分的情境下,如果需要扩展新的功能,通常 … the green board companyWebThis changes the ioctl usage of kernel/power/user.c to use the unlocked_ioctl Signed-off-by: Stoyan Gaydarov ... #include #include +#include #include #include #include the green board game company story cardsWeb14 dec. 2024 · In this article. When defining new IOCTLs, it is important to remember the following rules: If a new IOCTL will be available to user-mode software components, the IOCTL must be used with IRP_MJ_DEVICE_CONTROL requests. User-mode components send IRP_MJ_DEVICE_CONTROL requests by calling the DeviceIoControl, which is a … the green board game company ltdWebput_user store the value val to user-space address address ; Type can be one on 8, 16, 32, 64 bit (the maximum supported type depends on the hardware platform); get_user analogue to the previous function, only that val will be set to a value identical to the value at the user-space address given by address; the back store bellevueWebCore outline of flow between user process, ioctl and trace_event APIs. Signed-off-by: Beau Belgrave --- kernel/trace/Kconfig ... User + processes can determine if their tracing events should be + generated by memory mapping a tracefs file and checking for + an associated byte being non-zero. + + If in doubt, ... the green book 14aWeb20 aug. 2012 · If you are adding new ioctl's to the kernel, you should use the _IO macros defined in : _IO an ioctl with no parameters _IOW an ioctl with write … the back store bellevue waWeb27 dec. 2024 · 1.传递单个数据. put_user ()可以向用户空间传递单个数据。单个数据并不是指一个字节数据,对ARM而言, put_user一次性可传递一个char , short或者int型的数据, … the green boat mary pipher