segment.h,v

linux-0.10 对于想了解linux内核,而又不想花太多精力的人,最好就是这种低版本,而具有核心价值的程序

head     1.1;
branch   ;
access   ;
symbols  ;
locks    tytso:1.1; strict;
comment  @ * @;


1.1
date     91.11.25.10.43.03;  author tytso;  state Exp;
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desc
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1.1
log
@Initial revision
@
text
@extern inline unsigned char get_fs_byte(const char * addr)
{
	unsigned register char _v;

	__asm__ ("movb %%fs:%1,%0":"=r" (_v):"m" (*addr));
	return _v;
}

extern inline unsigned short get_fs_word(const unsigned short *addr)
{
	unsigned short _v;

	__asm__ ("movw %%fs:%1,%0":"=r" (_v):"m" (*addr));
	return _v;
}

extern inline unsigned long get_fs_long(const unsigned long *addr)
{
	unsigned long _v;

	__asm__ ("movl %%fs:%1,%0":"=r" (_v):"m" (*addr)); \
	return _v;
}

extern inline void put_fs_byte(char val,char *addr)
{
__asm__ ("movb %0,%%fs:%1"::"r" (val),"m" (*addr));
}

extern inline void put_fs_word(short val,short * addr)
{
__asm__ ("movw %0,%%fs:%1"::"r" (val),"m" (*addr));
}

extern inline void put_fs_long(unsigned long val,unsigned long * addr)
{
__asm__ ("movl %0,%%fs:%1"::"r" (val),"m" (*addr));
}
@