Книга: Microsoft Windows Embedded CE 6.0 Exam Preparation Kit
Process Address Space
Process Address Space
The process address space ranges from 0x00000000 through 0x7FFFFFFF, and is divided into a CPU-dependent kernel data section, four main process regions, and a 1 MB buffer between user and kernel spaces. Figure 5-7 illustrates the main regions. The first process region of 1 GB is for application code and data. The next process region of 512 MB is for the DLLs and read-only data. The next two regions of 256 MB and 255 MB are for memory-mapped objects and the shared system heap. The shared system heap is read-only for the application process, but readable and writable for the kernel.
Figure 5-7 Process space in Windows Embedded CE 6.0
Table 5-10 summarizes the virtual memory regions in user space with start and end addresses.
Table 5-10 Process memory regions
| Start Address | End Address | Description |
|---|---|---|
| 0x7FF00000 | 0x7FFFFFFF | An unmapped buffer for protection between user and kernel spaces. |
| 0x70000000 | 0x7FEFFFFF | Shared heap between the kernel and processes. |
| 0x60000000 | 0x6FFFFFFF | Memory-mapped file objects that do not correspond to an actual physical file, mainly for backward compatibility with applications that used RAM-backed map files for inter-process communication. |
| 0x40000000 | 0x5FFFFFFF | DLLs loaded into the process and read-only data. |
| 0x00010000 | 0x3FFFFFFF | Application code and data. |
| 0x00000000 | 0x00010000 | CPU-dependent user kernel data (read-only for user processes). |
Оглавление книги
- Kernel Address Space
- 2.3.5. Memory Space
- 2.3.7. Process Virtual Memory
- 6.2.3. Ring-Based Multiprocessors
- 7.3. PROCESS MANAGEMENT IN AMOEBA
- Introduction to Microprocessors and Microcontrollers
- Using Double Quotes to Resolve Variables in Strings with Embedded Spaces
- Internet Service Providers who use assigned IP addresses
- Using the kill Command to Control Processes
- namespace-uri()
- 1. Basic microprocessor systems
- Chapter 2. Four Puzzles From Cyberspace