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/* Copyright (C) 1995,1996 Robert de Bath <rdebath@cix.compulink.co.uk>
* This file is part of the Linux-8086 C library and is distributed
* under the GNU Library General Public License.
*/
/*
* These functions will not normally be useful for Linux-8086. But they
* can be used and may be useful in the kernel.
*/
#ifdef __AS386_16__
#ifdef L___seg_regs
unsigned int
__get_cs()
{
#asm
mov ax,cs
#endasm
}
unsigned int
__get_ds()
{
#asm
mov ax,ds
#endasm
}
unsigned int
__get_es()
{
#asm
mov ax,es
#endasm
}
void
__set_es(seg)
{
#asm
#if __FIRST_ARG_IN_AX__
mov es,ax
#else
mov bx,sp
mov es,[bx+2]
#endif
#endasm
}
#endif
#ifdef L___peek_es
int
__peek_es(off)
unsigned int off;
{
#asm
#if __FIRST_ARG_IN_AX__
mov bx,ax
#else
mov bx,sp
mov bx,[bx+2]
#endif
seg es
mov al,[bx]
xor ah,ah
#endasm
}
#endif
#ifdef L___poke_es
int
__poke_es(off, value)
unsigned int off;
int value;
{
#asm
#if __FIRST_ARG_IN_AX__
mov bx,sp
mov bx,[bx+2]
xchg ax,bx
#else
mov bx,sp
mov ax,[bx+4]
mov bx,[bx+2]
#endif
seg es
mov [bx],al
xor ah,ah
#endasm
}
#endif
#ifdef L___deek_es
int
__deek_es(off)
unsigned int off;
{
#asm
#if __FIRST_ARG_IN_AX__
mov bx,ax
#else
mov bx,sp
mov bx,[bx+2]
#endif
seg es
mov ax,[bx]
#endasm
}
#endif
#ifdef L___doke_es
int
__doke_es(off, value)
unsigned int off;
int value;
{
#asm
#if __FIRST_ARG_IN_AX__
mov bx,sp
mov bx,[bx+2]
xchg ax,bx
#else
mov bx,sp
mov ax,[bx+4]
mov bx,[bx+2]
#endif
seg es
mov [bx],ax
#endasm
}
#endif
#ifdef L___strchr_es
char *
__strchr_es(s, c)
char * s;
int c;
{
#asm
mov bx,sp
push si
#if __FIRST_ARG_IN_AX__
mov bx,[bx+2]
mov si,ax
#else
mov si,[bx+2]
mov bx,[bx+4]
#endif
xor ax,ax
#ifdef PARANOID
cld
#endif
push ds
push es
pop ds
in_loop:
lodsb
cmp al,bl
jz got_it
or al,al
jnz in_loop
pop ds
pop si
ret
got_it:
lea ax,[si-1]
pop ds
pop si
#endasm
}
#endif
#ifdef L___strchr_es
char *
__strnget_es(d, s, c)
char *d, *s;
int c;
{
int ds, es;
char *p = __strchr_es(s, '\0');
if(p != 0 && p-s < c)
c = p-s+1;
ds = __get_ds();
es = __get_es();
__movedata(es, s, ds, d, c);
}
#endif
#endif /* __AS386_16__ */
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