Add new code

Signed-off-by: Carlos Maiolino <[email protected]>

1 files changed, 29 insertions, 0 deletions

diff --git a/PGU/CHAP6_7/write-newline.s b/PGU/CHAP6_7/write-newline.s
new file mode 100644
index 0000000..e916379
--- /dev/null
+++ b/PGU/CHAP6_7/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
+
+