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MIT 6.828 JOS学习笔记16. Lab 2.2
Part 3 Kernel Address Space JOS把32位线性地址虚拟空间划分成两个部分。其中用户环境(进程运行环境)通常占据低地址的那部分,叫用户地址空间。而操作系统内核总是占据高地址的部分,叫内核地址空间。这两个部分的分界线是定义在memlayout.h文件中的一个宏 ULIM。JO ...
分类:其他好文   时间:2016-03-31 07:04:44    阅读次数:394
linux(x86) exploit 开发系列6:使用return-to-plt绕过ASLR
What is ASLR? Address space layout randomization (ASLR) is an exploit mitigation technique that randomizes Stack address. Heap address. Shared library...
分类:系统相关   时间:2016-03-19 21:15:04    阅读次数:601
Process's address space and heap
Typically, in each process, the virtual memory available to that process is called itsaddress space. Each process's address space is typically organiz...
分类:其他好文   时间:2016-01-27 13:02:38    阅读次数:179
Windows API 之 VirtualAlloc(未完)
Reserves, commits, or changes the state of a region of pages in the virtual address space of the calling process. Memory allocated by this function is...
分类:Windows程序   时间:2015-11-17 21:57:04    阅读次数:483
数据的表示、布尔代数、C的位运算_15.09.14-第二章(2.1.8)
1、机器级程序将存储器视为一个非常大的字节数组,称为虚拟存储器virtual memory。存储器的每个字节都由一个唯一的数字来标识,称为它的地址address,所有可能地址的集合称为虚拟地址空间virtual address space。这只是一个展现给机器的概念性映像。实际上的实现是将RAM.....
分类:其他好文   时间:2015-10-26 22:13:28    阅读次数:215
Operating System: Three Easy Pieces --- Beyond Physical Memory: Mechanisms (Note)
Thus far, we have assumed that an address space is unrealistically small and fits into the physicalmemory. In fact, we have been assuming that every a...
分类:其他好文   时间:2015-10-07 08:34:19    阅读次数:170
Operating System: Three Easy Pieces --- Paging: TLB (Note)
Using paging as the core mechanism to support virtual memeory can lead to high performanceoverheads. By chopping the address space into small, fixed-s...
分类:其他好文   时间:2015-10-02 01:28:25    阅读次数:441
Position Independent Code (PIC) in shared libraries【转载】
I've described the need for special handling of shared libraries while loading them into the process's address space in aprevious article. Briefly, wh...
分类:其他好文   时间:2015-09-23 18:53:10    阅读次数:297
f2fs解析(四)f2fs的extent特性
extent的意思是“程度”,但是我还是搞不清楚要如何把“程度”和我理解的extent联系到一起。文件的偏移和page-cache的映射关系体现在address space 中的一颗基数树上;当基数树中的page真正落盘时,f2fs也有自己的block分配算法去存储这个page;当数据真正落盘之后,...
分类:其他好文   时间:2015-09-15 21:51:00    阅读次数:214
address_space 从哪里来
address_space 从哪里来这两天想弄清楚linux的内存分配,忽然看到了address_space,就想弄明白。整个内核就见到 address_space(1)和address_space(2)在这个文件里出现。include/linux/compiler.h: # define __us...
分类:其他好文   时间:2015-09-04 07:28:25    阅读次数:258
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