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Add usermode GDT entries

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This commit is contained in:
pjht 2019-02-10 13:19:04 -06:00
parent cec08e8609
commit 0534ba86e6
1 changed files with 4 additions and 2 deletions
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6
cpu/i386/gdt.c
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@ -1,5 +1,5 @@
#include <stdint.h>
#define NUM_ENTRIES 4
#define NUM_ENTRIES 5
typedef struct {
uint16_t limit_low16;
@ -21,8 +21,10 @@ gdt_description gdt_desc;
void gdt_init() {
set_entry(0,0,0,0);
set_entry(1,0,0xFFFFF,0x9E);
set_entry(1,0,0xFFFFF,0x9A);
set_entry(2,0,0xFFFFF,0x92);
set_entry(3,0,0xFFFFF,0xFA);
set_entry(4,0,0xFFFFF,0xF2);
gdt_desc.size=(sizeof(gdt_entry)*NUM_ENTRIES)-1;
gdt_desc.address=&gdt[0];
asm volatile("lgdt gdt_desc");