| 1,26 → 1,22 |
|---|
| # memcpy() Author: Kees J. Bot 2 Jan 1994 |
| /* 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. |
| /* 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" |
| |
| .intel_syntax |
| |
| .globl _memcpy |
| |
| .text |
| |
| .align 16 |
| _memcpy: |
| push ebp |
| mov ebp, esp |
| push esi |
| push edi |
| mov edi, [ebp+8] # String s1 |
| mov esi, [ebp+12] # String s2 |
| mov ecx, [ebp+16] # Length |
| # No overlap check here |
| jmp __memcpy # Call the part of __memmove that copies up |
| 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 */ |