本書主要介紹系統軟體的執行機制和原理：應用程式在Windows和Linux編譯、連結和執行所發生的各種事項，包括：如何保存程式碼指令、程式庫檔案如何與應用程式碼靜態連結、應用程式如何載入記憶體並開始執行、如何實作動態連結、C/C++執行期程式庫的工作原理，以及如何呼叫作業系統提供的系統服務。每個技術專題都配備了大量圖、表和程式碼實例，力求將複雜的機制以簡潔的形式表達出來。本書最後還提供了一個小巧且跨平臺的C/C++執行期程式庫MiniCRT，綜合展示了與執行期程式庫相關的各種技術。(This book mainly introduces the implementation mechanism and principle of the system software: The application compiles, links and executes various things happening in Windows and Linux, including how to save the code instruction, how the library file is statically linked with the application code and how the application program is Load memory and start execution, how to implement dynamic linking, how C / C ++ runtime libraries work, and how to call system services provided by the operating system. Each technical topic is equipped with a large number of charts, tables and code examples, and strive to complex mechanisms expressed in concise form. Finally, the book also provides a compact and cross-platform C / C ++ runtime library MiniCRT, a comprehensive display of the implementation of the library associated with a variety of technologies.)