nuclear@7: 	.data
nuclear@8: 	.align 4
nuclear@8: /* memory reserved for setup_selectors */
nuclear@7: off:.long 0
nuclear@7: seg:.short 0
nuclear@8: /* memory reserved for set_gdt */
nuclear@8: lim:.short 0
nuclear@8: addr:.long 0
nuclear@7: 
nuclear@7: 	.text
nuclear@7: /* setup_selectors(uint16_t code, uint16_t data)
nuclear@7:  * loads the requested selectors to all the selector registers */
nuclear@7: 	.globl setup_selectors
nuclear@7: setup_selectors:
nuclear@8: 	/* set data selectors directly */
nuclear@7: 	movl 8(%esp), %eax
nuclear@7: 	movw %ax, %ss
nuclear@7: 	movw %ax, %es
nuclear@7: 	movw %ax, %ds
nuclear@7: 	movw %ax, %gs
nuclear@7: 	movw %ax, %fs
nuclear@8: 	/* set cs using a long jump */
nuclear@7: 	movl 4(%esp), %eax
nuclear@7: 	movw %ax, (seg)
nuclear@7: 	movl $ldcs, (off)
nuclear@7: 	ljmp *off
nuclear@7: ldcs:
nuclear@7: 	ret
nuclear@7: 
nuclear@7: /* set_gdt(uint32_t addr, uint16_t limit)
nuclear@7:  * loads the GDTR with the new address and limit for the GDT */
nuclear@7: 	.globl set_gdt
nuclear@7: set_gdt:
nuclear@7: 	movl 4(%esp), %eax
nuclear@8: 	movl %eax, (addr)
nuclear@7: 	movw 8(%esp), %ax
nuclear@8: 	movw %ax, (lim)
nuclear@8: 	lgdt (lim)	
nuclear@7: 	ret
nuclear@54: 
nuclear@54: /* set_task_reg(uint16_t tss_selector)
nuclear@54:  * loads the TSS selector in the task register */
nuclear@54: 	.globl set_task_reg
nuclear@54: set_task_reg:
nuclear@55: 	mov 4(%esp), %eax
nuclear@54: 	ltr 4(%esp)
nuclear@54: 	ret