1.1 --- a/src/segm.c	Mon Aug 08 09:53:10 2011 +0300
     1.2 +++ b/src/segm.c	Sun Aug 14 16:57:23 2011 +0300
     1.3 @@ -21,8 +21,7 @@
     1.4  
     1.5  enum {TYPE_DATA, TYPE_CODE};
     1.6  
     1.7 -#define TSS_TYPE_BITS	0x900
     1.8 -#define TSS_BUSY		BIT_BUSY
     1.9 +#define TSS_TYPE_BITS	(BIT_ACCESSED | BIT_CODE)
    1.10  
    1.11  static void segm_desc(desc_t *desc, uint32_t base, uint32_t limit, int dpl, int type);
    1.12  static void task_desc(desc_t *desc, uint32_t base, uint32_t limit, int dpl, unsigned int busy);
    1.13 @@ -30,6 +29,7 @@
    1.14  /* these functions are implemented in segm-asm.S */
    1.15  void setup_selectors(uint16_t code, uint16_t data);
    1.16  void set_gdt(uint32_t addr, uint16_t limit);
    1.17 +void set_task_reg(uint16_t tss_selector);
    1.18  
    1.19  
    1.20  /* our global descriptor table */
    1.21 @@ -43,7 +43,6 @@
    1.22  	segm_desc(gdt + SEGM_KDATA, 0, 0xffffffff, 0, TYPE_DATA);
    1.23  	segm_desc(gdt + SEGM_UCODE, 0, 0xffffffff, 3, TYPE_CODE);
    1.24  	segm_desc(gdt + SEGM_UDATA, 0, 0xffffffff, 3, TYPE_DATA);
    1.25 -	task_desc(gdt + SEGM_TASK, 0, 0xffffffff, 3, TSS_BUSY);
    1.26  
    1.27  	set_gdt((uint32_t)gdt, sizeof gdt - 1);
    1.28  
    1.29 @@ -56,6 +55,12 @@
    1.30  	return (idx << 3) | (rpl & 3);
    1.31  }
    1.32  
    1.33 +void set_tss(uint32_t addr)
    1.34 +{
    1.35 +	task_desc(gdt + SEGM_TASK, 0, sizeof(struct tss) - 1, 3, TSS_BUSY);
    1.36 +	set_task_reg(selector(SEGM_TASK, 0));
    1.37 +}
    1.38 +
    1.39  static void segm_desc(desc_t *desc, uint32_t base, uint32_t limit, int dpl, int type)
    1.40  {
    1.41  	desc->d[0] = limit & 0xffff; /* low order 16bits of limit */