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kolibrios/drivers/ddk/string/memcpy.S
Sergey Semyonov (Serge) 49cb0f914d ddk: fix strcpy
devman: scan pci root bus

git-svn-id: svn://kolibrios.org@1627 a494cfbc-eb01-0410-851d-a64ba20cac60
2010-09-26 22:57:18 +00:00

23 lines
716 B
ArmAsm

/* memcpy() Author: Kees J. Bot */
/* 2 Jan 1994 */
/* void *memcpy(void *s1, const void *s2, size_t n) */
/* Copy a chunk of memory. */
/* This routine need not handle overlap, so it does not handle overlap. */
/* One could simply call __memmove, the cost of the overlap check is */
/* negligible, but you are dealing with a programmer who believes that if */
/* anything can go wrong, it should go wrong. */
/* */
#include "asm.h"
ENTRY(memcpy)
push %ebp
movl %esp, %ebp
push %esi
push %edi
movl 8(%ebp), %edi /* String s1 */
movl 12(%ebp), %esi /* String s2 */
movl 16(%ebp), %ecx /* Length */
/* No overlap check here */
jmp _C_LABEL(_memcpy) /* Call the part of __memmove that copies up */