From d98f46ce647846b0aa30b2e16a30fd4e152a1bf5 Mon Sep 17 00:00:00 2001 From: Carlos Maiolino Date: Thu, 10 Jul 2025 22:55:07 +0200 Subject: Add new code Signed-off-by: Carlos Maiolino --- PGU/CHAP9/write-newline.s | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 PGU/CHAP9/write-newline.s (limited to 'PGU/CHAP9/write-newline.s') diff --git a/PGU/CHAP9/write-newline.s b/PGU/CHAP9/write-newline.s new file mode 100644 index 0000000..e916379 --- /dev/null +++ b/PGU/CHAP9/write-newline.s @@ -0,0 +1,29 @@ +# Just write a newline (\n) to STDOUT + +.include "linux.s" +.type write_newline, @function +.globl write_newline + +.section .data + +newline: + .ascii "\n" + +.section .text + .equ ST_FILEDES, 16 + +write_newline: + pushq %rbp + movq %rsp, %rbp + + movq $SYS_WRITE, %rax + movq ST_FILEDES(%rbp), %rdi + movq $newline, %rsi + movq $1, %rdx + syscall + + movq %rbp, %rsp + popq %rbp + ret + + -- cgit v1.2.3