自家种植的内核出现三重故障(Triple fault in home grown kernel)

 我正在尝试编写一个内核，主要用于娱乐目的，而且我遇到了一个问题，因为我认为这是三重故障。 在我尝试启用分页之前一切正常。 破解的代码是这样的： 
 
void switch_page_directory(page_directory_t *dir){

 current_directory = dir;
 asm volatile("mov %0, %%cr3":: "r"(&dir->tablesPhysical));

 u32int cr0;
 asm volatile("mov %%cr0, %0": "=r"(cr0));

 cr0 |= 0x80000000;//enable paging
 asm volatile("mov %0, %%cr0":: "r"(cr0)); //this line breaks


}//switch page directory
 
 为此，我一直在关注各种教程/文档，但是我用于分页的教程是http://www.jamesmolloy.co.uk/tutorial_html/6.-Paging.html 。 我不确定其他代码对于解决这个问题是有用的，但是如果有更多的我应该提供，我会非常乐意这样做。 
 
 编辑===== 
 
 我相信CS，DS和SS正在选择正确的条目，这里是用于设置它们的代码 
 
global gdt_flush     
extern gp            
gdt_flush:

    lgdt [gp]        ; Load the GDT with our 'gp' which is a special pointer
    mov ax, 0x10      ; 0x10 is the offset in the GDT to our data segment

    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov ss, ax

    jmp 0x08:flush2   ; 0x08 is the offset to our code segment: Far jump!

flush2:
    ret               ; Returns back to the C code!
 
 这里是gdt结构本身 
 
struct gdt_entry{
    unsigned short limit_low;
    unsigned short base_low;
    unsigned char base_middle;
    unsigned char access;
    unsigned char granularity;
    unsigned char base_high;
} __attribute__((packed));

struct gdt_ptr{
    unsigned short limit;
    unsigned int base;
} __attribute__((packed));

struct gdt_entry gdt[5];
struct gdt_ptr gp;
 
 IDT与此非常相似。 

I am trying to write a kernel, mostly for entertainment purposes, and I am running into a problem were I believe it is triple faulting. Everything worked before I attempted to enable paging. The code that is breaking is this: 
 
void switch_page_directory(page_directory_t *dir){

 current_directory = dir;
 asm volatile("mov %0, %%cr3":: "r"(&dir->tablesPhysical));

 u32int cr0;
 asm volatile("mov %%cr0, %0": "=r"(cr0));

 cr0 |= 0x80000000;//enable paging
 asm volatile("mov %0, %%cr0":: "r"(cr0)); //this line breaks


}//switch page directory
 
I have been following a variety of tutorials / documents for this but the one I am using to paging is thus http://www.jamesmolloy.co.uk/tutorial_html/6.-Paging.html . I am not sure what other code will be useful in figuring this out but if there is more I should provide I will be more than happy to do so.
 
Edit=====
 
I believe the CS,DS and SS are selecting correct entries here's the code used to set them
 
global gdt_flush     
extern gp            
gdt_flush:

    lgdt [gp]        ; Load the GDT with our 'gp' which is a special pointer
    mov ax, 0x10      ; 0x10 is the offset in the GDT to our data segment

    mov ds, ax
    mov es, ax
    mov fs, ax
    mov gs, ax
    mov ss, ax

    jmp 0x08:flush2   ; 0x08 is the offset to our code segment: Far jump!

flush2:
    ret               ; Returns back to the C code!
 
and here's the gdt struct itself
 
struct gdt_entry{
    unsigned short limit_low;
    unsigned short base_low;
    unsigned char base_middle;
    unsigned char access;
    unsigned char granularity;
    unsigned char base_high;
} __attribute__((packed));

struct gdt_ptr{
    unsigned short limit;
    unsigned int base;
} __attribute__((packed));

struct gdt_entry gdt[5];
struct gdt_ptr gp;
 
The IDT is very similar to this.

原文：https://stackoverflow.com/questions/4081246