From f10b2f3c88f50a5e2b6fe4a23d6e446878b40b72 Mon Sep 17 00:00:00 2001
From: Kwarde <kevin@kwarde.com>
Date: Tue, 24 Jun 2025 15:06:21 +0200
Subject: [PATCH] Save/restore rdi to r10 instead of stack in strcat(),puts()

---
 console.asm | 6 ++----
 string.asm  | 6 ++----
 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/console.asm b/console.asm
index 27649b9..77a16f1 100644
--- a/console.asm
+++ b/console.asm
@@ -27,11 +27,9 @@ puts:
 	push	rbp
 	mov	rbp, rsp
 
-	push	rdi
-	sub	rsp, 8
+	mov	r10, rdi
 	call	print
-	add	rsp, 8
-	pop	rdi
+	mov	rdi, r10
 	mov	rax, 1
 	mov	rdi, 1
 	mov	rsi, NL
diff --git a/string.asm b/string.asm
index aa17097..ce91a5a 100644
--- a/string.asm
+++ b/string.asm
@@ -54,13 +54,11 @@ strcat:
 	push	rbp
 	mov	rbp, rsp
 
-	push	rdi
-	sub	rsp, 8
+	mov	r10, rdi
 	call	strlen
 	add	rdi, rax
 	call	strcpy
-	add	rsp, 8
-	pop	rax
+	mov	rax, r10
 
 	leave
 	ret