Polish up strcpy code

2025-01-24 19:01:05 +00:00 · 2025-01-24 19:01:05 +00:00 · 7498741388
commit 7498741388
parent d23173c8de
1 changed files with 4 additions and 10 deletions
--- a/lib/strcpy.S
+++ b/lib/strcpy.S
@ -1,23 +1,17 @@
    .intel_syntax noprefix

-    .globl _start
-
    .text

-
-# String-copying routine.
-# Commented-out lines would also return the starting address of the destination address.
+# String-copying routine. Strings should be null-terminated.
+# Input: rdi = source string base, rsi = destination string base
+# No check is done for buffer overflow.
 strcpy:
-#    push rsi
-.loop:
    movb r10b, [rdi]
    cmpb r10b, 0
    je .end
    movb [rsi], r10b
    inc rdi
    inc rsi
-    jmp .loop
+    jmp strcpy
 .end:
-#    pop rax
    ret
-