%macro scall 4
mov rax, %1
mov rdi, %2
mov rsi, %3
mov rdx, %4
syscall
%endmacro
section .data
msg1 db 10,"Contents of GDTR: "
msg1len equ $-msg1
msg2 db 10,"------Exiting from the program!!-------"
msg2len equ $-msg2
msg3 db " : "
msg3len equ $-msg3
cnt2 db 04H
newline db 10
section .bss
g:
resd 1
resw 1
value resb 4

section .text
global _start
_start:
;------gdtr contents---------
scall 1,1,msg1,msg1len
sgdt[g]
mov bx,word[g+4] ;BASE
call conversion
mov bx,word[g+2] ;LIMIT
call conversion
mov bx,word[g]
scall 1,1,msg3,msg3len
call conversion
scall 1,1,newline,1


scall 1,1,msg2,msg2len
mov rax,60
mov rdi,0
syscall
;----------HEX to ASCII conversion-------------
conversion:
mov rdi,value
mov byte[cnt2],4H
aup:
rol bx,04
mov cl,bl
and cl,0fH
cmp cl,09H
jbe ANEXT
add cl,30H
ANEXT:
add cl,30H
mov byte[rdi],cl
inc rdi
dec byte[cnt2]
JNZ aup
scall 1,1,value,4
ret