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; Version : 0.1
; Last update : 12/8/2020
; Description : Do you need ultimate yes performance? Well, you've come to the right place.
; Copyright (C) ; 2020 Gentoo-libre Install
; Licence : GPLv3+
; Note : Assumes that the stack is at least 65536 bytes.
section .data
Yes: db 0xA,'y',0xA,'y',0xA,'y',0xA,'y' ;8 bytes as the stack is written to 8 bytes at a time
section .text
global _start
_start:
xor ecx,ecx ;0 out the counter register
ALIGN 16 ;Align the stack to 16 bytes
;; rsp is pointing to the "start" of the stack
yees: inc ecx ;increment the counter every loop
push qword[Yes] ;push 8 bytes to the stack
test ecx,512 ;Check for 8192 loops
je yees ;continue if amount is not reached
;;the stack is now full of 32768 bytes of '\ny' (maybe a bit more, but that's ignored)
mov edi,1 ;fd = STDOUT_FILENO
mov edx,4096 ;print 65536 bytes
mov rsi,rsp ;the value of rsp is the start of where the text is
yes:
mov eax,1 ;sys_write
syscall
jmp yes ;print those 65536 bytes of 'y\n' forever
;;this won't ever be reached but it's left for any future usage
exit:
mov eax, 60 ;sys_exit
xor edi, edi ;return 0
syscall ;do sys_exit
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