diff options
Diffstat (limited to 'src/include/asm/memory.h')
| -rw-r--r-- | src/include/asm/memory.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/include/asm/memory.h b/src/include/asm/memory.h new file mode 100644 index 0000000..8aa6d52 --- /dev/null +++ b/src/include/asm/memory.h | |||
| @@ -0,0 +1,14 @@ | |||
| 1 | /* | ||
| 2 | * NOTE!!! memcpy(dest,src,n) assumes ds=es=normal data segment. This | ||
| 3 | * goes for all kernel functions (ds=es=kernel space, fs=local data, | ||
| 4 | * gs=null), as well as for all well-behaving user programs (ds=es= | ||
| 5 | * user data space). This is NOT a bug, as any user program that changes | ||
| 6 | * es deserves to die if it isn't careful. | ||
| 7 | */ | ||
| 8 | //#define memcpy(dest,src,n) ({ \ | ||
| 9 | //void * _res = dest; \ | ||
| 10 | //__asm__ __volatile__ ("cld;rep;movsb" \ | ||
| 11 | // ::"D" ((long)(_res)),"S" ((long)(src)),"c" ((long) (n)) \ | ||
| 12 | // ); \ | ||
| 13 | //_res; \ | ||
| 14 | //}) | ||