| static inline unsigned char get_fs_byte(const char * addr) |
| { |
| register unsigned char _v; |
| |
| __asm__ ("movb %%fs:%1,%0":"=q" (_v):"m" (*addr)); |
| return _v; |
| } |
| |
| static inline unsigned short get_fs_word(const unsigned short *addr) |
| { |
| unsigned short _v; |
| |
| __asm__ ("movw %%fs:%1,%0":"=r" (_v):"m" (*addr)); |
| return _v; |
| } |
| |
| static inline unsigned long get_fs_long(const unsigned long *addr) |
| { |
| unsigned long _v; |
| |
| __asm__ ("movl %%fs:%1,%0":"=r" (_v):"m" (*addr)); \ |
| return _v; |
| } |
| |
| static inline void put_fs_byte(char val,char *addr) |
| { |
| __asm__ ("movb %0,%%fs:%1"::"iq" (val),"m" (*addr)); |
| } |
| |
| static inline void put_fs_word(short val,short * addr) |
| { |
| __asm__ ("movw %0,%%fs:%1"::"ir" (val),"m" (*addr)); |
| } |
| |
| static inline void put_fs_long(unsigned long val,unsigned long * addr) |
| { |
| __asm__ ("movl %0,%%fs:%1"::"ir" (val),"m" (*addr)); |
| } |
| |
| static inline void memcpy_tofs(void * to, const void * from, unsigned long n) |
| { |
| __asm__("cld\n\t" |
| "push %%es\n\t" |
| "push %%fs\n\t" |
| "pop %%es\n\t" |
| "testb $1,%%cl\n\t" |
| "je 1f\n\t" |
| "movsb\n" |
| "1:\ttestb $2,%%cl\n\t" |
| "je 2f\n\t" |
| "movsw\n" |
| "2:\tshrl $2,%%ecx\n\t" |
| "rep ; movsl\n\t" |
| "pop %%es" |
| ::"c" (n),"D" ((long) to),"S" ((long) from) |
| :"cx","di","si"); |
| } |
| |
| static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) |
| { |
| __asm__("cld\n\t" |
| "testb $1,%%cl\n\t" |
| "je 1f\n\t" |
| "fs ; movsb\n" |
| "1:\ttestb $2,%%cl\n\t" |
| "je 2f\n\t" |
| "fs ; movsw\n" |
| "2:\tshrl $2,%%ecx\n\t" |
| "rep ; fs ; movsl" |
| ::"c" (n),"D" ((long) to),"S" ((long) from) |
| :"cx","di","si"); |
| } |
| |
| /* |
| * Someone who knows GNU asm better than I should double check the followig. |
| * It seems to work, but I don't know if I'm doing something subtly wrong. |
| * --- TYT, 11/24/91 |
| * [ nothing wrong here, Linus: I just changed the ax to be any reg ] |
| */ |
| |
| static inline unsigned long get_fs(void) |
| { |
| unsigned short _v; |
| __asm__("mov %%fs,%0":"=r" (_v):); |
| return _v; |
| } |
| |
| static inline unsigned long get_ds(void) |
| { |
| unsigned short _v; |
| __asm__("mov %%ds,%0":"=r" (_v):); |
| return _v; |
| } |
| |
| static inline void set_fs(unsigned long val) |
| { |
| __asm__ __volatile__("mov %0,%%fs"::"r" ((unsigned short) val)); |
| } |
| |