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16 lines
493 B
16 lines
493 B
2 years ago
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/*
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* NOTE!!! memcpy(dest,src,n) assumes ds=es=normal data segment. This
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* goes for all kernel functions (ds=es=kernel space, fs=local data,
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* gs=null), as well as for all well-behaving user programs (ds=es=
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* user data space). This is NOT a bug, as any user program that changes
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* es deserves to die if it isn't careful.
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*/
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#define memcpy(dest,src,n) ({ \
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void * _res = dest; \
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__asm__ ("cld;rep;movsb" \
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::"D" ((long)(_res)),"S" ((long)(src)),"c" ((long) (n)) \
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); \
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_res; \
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})
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