关于cpu_gdt_table[GDT_ENTRIES]的问题

orclc 2005-08-03 03:23:15

我在程序了作了如下声明：
extern struct desc_struct cpu_gdt_table[GDT_ENTRIES];

编译时出错，错误信息为：
array type has incomplete element type

这是为什么啊？

...全文

100 回复打赏收藏转发到动态举报

写回复

回复

切换为时间正序

请发表友善的回复…

发表回复

我们基于RH9 内核从两部分来分析Linux系统动态运行过程一：系统初始化开始，Linux进入保护模式，初始内存系统、中断系统、文件系统等，直到创建第一个用户进程。二：用户进程通过系统调用主动进入内核，CPU 接受中断请求被动执行各种中断服务。

A guide to how the FreeBSD kernel manages the IA32 processors in Protected Mode (c) 2004, Arne Vidstrom, http://vidstrom.net Version 1.0 : 2004-06-17 Table of contents 1. P REREQUISITE KNOWLEDGE ....................................................................................2 2. I NFORMATION SOURCES ..........................................................................................2 3. T HE I NTERRUPT D ESCRIPTOR T ABLE (IDT)............................................................2 3.1 The IDT definition............................................................................................2 3.2 Setting entries in the IDT.................................................................................3 3.3 A look inside the IDT with KernView ..............................................................4 3.4 Making the IDT active .....................................................................................5 4. S YSCALL HANDLING ...............................................................................................6 4.1 The INT 0x80 interrupt handler.......................................................................6 4.2 Syscall dispatching...........................................................................................8 4.3 The copyin() function.....................................................................................10 5. T HE G LOBAL D ESCRIPTOR T ABLE (GDT).............................................................12 5.1 The GDT definition........................................................................................12 5.2 Setting up the descriptors in the GDT............................................................13 5.3 Making the GDT active..................................................................................16 5.4 A look inside the GDT with KernView...........................................................17 5.5 Segment selector values in an ordinary user mode program ........................21 6. T ASK SWITCHING ..................................................................................................22 6.1 The cpu_switch() function..............................................................................22 7. V IRTUAL PAGING ..................................................................................................29 7.1 The page fault handler...................................................................................29 7.2 Virtual paging and task switching.................................................................32 8 T HE L OCAL D ESCRIPTOR T ABLE (LDT).................................................................32 8.1 A quick glance at the LDT .............................................................................32 9. M ISCELLANEOUS ..................................................................................................34 9.1 The uiomove() function..................................................................................34 1. Prerequisite knowledge This guide assumes that the reader is familiar with how the IA32 processors work in Protected Mode, with the C programming language, and with AT&T syntax IA32 assembler programming. It also assumes some knowledge about user mode system programming for FreeBSD and some general knowledge about the internal workings of the kernel. 2. Information sources The primary source of information used when writing this guide has been the FreeBSD kernel source code itself. The FreeBSD Kernel Cross-Reference at http://fxr.watson.org/ has been very valuable for doing easy searches in the kernel source code, but the source code snippets in the text comes from the /usr/src directory tree on a FreeBSD 4.9 installation. Also, the book The Design and Implementation of the 4.4 BSD Operating System, by McKusick / Bostic / Karels / Quarterman, was very useful as a general kernel overview. The references used for IA32 information are the IA-32 Intel Architecture Software Developer’s Manual from Intel, and the book Protected Mode Software Architecture

Kernel initialization. Part 8. 在原文的基础上添加了5.10.13部分的源码解读。 Scheduler initialization This is the eighth part of the Linux kernel initialization process chapter and we stopped on the setup_nr_cpu_ids function in the previous part. The main point of this part i

本书是获得了很多读者好评的Linux经典畅销书**《Linux从入门到精通》的第2版**。本书第﹖版以最新的Ubuntu 12.04为版本，循序渐进地向读者介绍了Linux 的基础应用、系统管理、网络应用、娱乐和办公、程序开发、服务器配置、系统安全等。//计算每个unit的大小，即每个group中的每个cpu占用的percpu内存大小为一个unit。//计算pcpu_nr_slots，即pcpu_slot数组的组项数量。

x86架构下Linux初始化流程中GDT建立和切换 1、代码流：_start()–>start_of_setup()–>main()–>go_to_protected_mode()–>protected_mode_jump()；函数所属文件： arch/x86/boot/head.S: _start()/start_of_setup(); //注：16位引导协议入口点...

4,465

社区成员

17,462

社区内容

发帖

与我相关

我的任务

社区管理员

加入社区

近7日
近30日
至今

加载中

查看更多榜单

社区公告

暂无公告

试试用AI创作助手写篇文章吧

+ 用AI写文章