kolibrios-gitea/drivers/ddk/string/strncpy.S

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/* strncpy() Author: Kees J. Bot */
/* 1 Jan 1994 */
/* char *strncpy(char *s1, const char *s2, size_t n) */
/* Copy string s2 to s1. */
/* */
#include "asm.h"
ENTRY(strncpy)
push %ebp
movl %esp, %ebp
push %esi
push %edi
movl 16(%ebp), %ecx /* Maximum length */
call _C_LABEL(_strncpy) /* Common code */
movl %edx, %ecx /* Number of bytes not copied */
rep stosb /* strncpy always copies n bytes by null padding */
movl 8(%ebp), %eax /* Return s1 */
pop %edi
pop %esi
pop %ebp
ret