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