OSDev.org

Posted: **Tue Aug 12, 2008 9:14 am**

try inspecting the value you're feeding LGDT with !

Posted: **Wed Aug 13, 2008 12:26 am**

Adek336 wrote:try inspecting the value you're feeding LGDT with !

i just copy someone's code (i am sorry ,forget who he is

)
but i change the function which load the gdtr..

,
any suggestion is expected....

thank you all !!

struct gdt_ptr_struct
{
	u16int limit;
	u32int base;
} __attribute__((packed));

typedef struct gdt_ptr_struct gdt_ptr_t;

gdt_ptr_t	gdt_ptr;

#define load_gdtr(n)\
__asm__("lgdt (%%eax)\n\t"\
::"a" (n));

load_gdtr((u32int)&gdt_ptr);

Posted: **Sun Aug 17, 2008 2:59 pm**

so how did you eventually make it work?

Posted: **Mon Aug 18, 2008 8:07 am**

I think this topic is worth to be added to WIKI

Posted: **Mon Aug 18, 2008 3:56 pm**

but we don't know what was the problem

(or I misunderstand the post flow)

Posted: **Tue Aug 19, 2008 6:38 pm**

Adek336 wrote:so how did you eventually make it work?

in fact , the code i had been posted work well,
maybe the problem comes from boot code which i used,

. i think. maybe
i modified the boot code, and the GDT code worked

problem of SWITCH TO USER MODE solved :-)