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Linux memory layout每一個user process看到的vitrual memory共有4G(32 bit machine)
其中通常切成3G:1G
0x00000000-0xbfffffff: user process(3GB)
0xc0000000-0xffffffff: kernel space (1GB)
而user process(3G)是每支user process不同的，甚至每支user thread也是不同
&… Read More- Memory zoneReference : Understaning the Linux Kernel Chap.8
Ideal computer architecture上，任意page frame都是可以被access的
但實際上的電腦架構在硬體上會有些限制住page frame被使用
Linux kernel must deal with two hardware constraints of the 80 × 86 architecture:
• The D… Read More
- 紀錄一下/proc/pid/maps的使用在跑起來的一支程式，可用cat /proc/pid/maps 來看他的memory layout
(似乎只看的到user space的)
以下是這段code看到的資訊:
address - The starting and ending address of the region in the process's address space
permissions - rwx就不用講了，p代表的是private(not shared)，… Read More
- Booting ARM system from bootloader to linux kernel有空來讀一下
會以u-boot code當作bootloader base
開到start_kernel之前的組語部分可以參考
http://gicl.cs.drexel.edu/people/sevy/linux/ARM_Linux_boot_sequence.html… Read More
- About kernel structureDOS was designed for running only one dsedicated process. => Is the perfect for some real-time, dedicated applications.UNIX, however, was designed for multi-user, multi-tasking applications.Kernel runs in… Read More
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