Shulou(Shulou.com)06/02 Report--

This article mainly explains "C language re-compilation execution analysis". The explanation content in this article is simple and clear, easy to learn and understand. Please follow the idea of Xiaobian slowly and deeply to study and learn "C language re-compilation execution analysis" together.

Read the a.out command from the keyboard

When we open our terminal, the shell executes its instructions and waits for our input.

When we type "a.out" on the keyboard and hit Enter, the shell knows that we have finished typing commands. The shell instructions then read the code and data from the target file a.out into registers one by one, and copy the code and data to main memory.

flow chart is as follows

So how does it run in hardware?

Popular science popularization:

Main memory is used to store instructions and data processed by instructions.

A processor (short for CPU) is an engine that interprets (or executes) instructions stored in main memory. At any point in time, a PC(program counter) in the CPU points to a machine-language instruction in main memory.

There is DMA (Direct Memory Access) technology where data can be transferred directly from disk to main memory without going through the processor.

Write output string from memory to display

Once the code and data in the a.out object file have been loaded into main memory, the CPU begins executing machine language instructions in the main.c program's main program.

These instructions copy the bytes in the "hello,world\n" string from main memory to the register file.

3. Copy the file from the register to the display device and finally display it on the screen.

Flowchart:

So how does this work in hardware?

Thank you for reading, the above is the "C language re-compilation execution analysis" content, after the study of this article, I believe we have a deeper understanding of the C language re-compilation execution analysis, the specific use of the situation also needs to be verified by practice. Here is, Xiaobian will push more articles related to knowledge points for everyone, welcome to pay attention!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.