Tricks and tips for everyone


What is APC DPC?

What is APC DPC?

APCs are similar to deferred procedure calls (DPCs), but unlike DPCs, APCs execute within the context of a particular thread. Drivers (other than file systems and file-system filter drivers) do not use APCs directly, but other parts of the operating system do, so you need to be aware of how APCs work.

What does a kernel mode driver do?

Kernel-mode drivers execute in kernel mode as part of the executive, which consists of kernel-mode operating system components that manage I/O, Plug and Play memory, processes and threads, security, and so on. Kernel-mode drivers are typically layered.

What is kernel mode code?

In Kernel mode, the executing code has complete and unrestricted access to the underlying hardware. It can execute any CPU instruction and reference any memory address. Kernel mode is generally reserved for the lowest-level, most trusted functions of the operating system.

What is Windows APC?

In Windows, an asynchronous procedure call (abbreviated APC) is a function that executes asynchronously in the context of a specific thread. APCs can be generated by the system (kernel-mode APCs) or by an application (user mode APCs).

Do I need DPC around window?

In addition to the fact that these cold spots around your windows and doors are costing you money in terms of energy, they can also be bad for your health because of issues like mould. This is why fitting a vertical DPC around your windows and doors is a must.

Why do we need kernel mode?

Userspace programs must use a system call into kernel mode in order to perform specialized functions. It may even be the kernel space where the trusted code of the OS will perform the needed task and then return the execution back to the userspace.

Are kernel drivers safe?

Kernel driver code that is used for development, testing, or manufacturing might include dangerous capabilities that pose a security risk. This dangerous code should never be signed with a certificate that is trusted by Windows.

Why is kernel mode needed?

How do I get to kernel mode?

The only way an user space application can explicitly initiate a switch to kernel mode during normal operation is by making an system call such as open, read, write etc. Whenever a user application calls these system call APIs with appropriate parameters, a software interrupt/exception(SWI) is triggered.

What is APC malware?

This process is known as Ashampoo Photo Commander 6. It belongs to Ashampoo Photo Commander; however, its developer origin remains unknown. It is commonly stored in C:\Program Files. Malware programmers or cybercriminals write different types of malicious programs and name them as APC.

What is APC programming?

In this article An asynchronous procedure call (APC) is a function that executes asynchronously in the context of a particular thread.

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