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#include <linux/types.h>
#include <asm/unistd.h>
/* Here are the macros which define how this platform makes
* system calls. This particular variant does _not_ set
* errno (note how it is disabled in __syscall_return) since
* these will get called before the errno symbol is dynamicly
* linked.
by the dynamic linker. The idea is that we want to be able
to call these before the errno symbol is dynamicly linked, so
we use our own version here. Note that we cannot assume any
dynamic linking at all, so we cannot return any error codes.
We just punt if there is an error. */
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
/* avoid using res which is declared to be in register d0; \
errno might expand to a function call and clobber it. */ \
/* int __err = -(res); \
errno = __err; */ \
res = -1; \
} \
return (type) (res); \
} while (0)
#define _syscall0(type,name) \
type name(void) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
__asm__ __volatile__ ("trap #0" \
: "=g" (__res) \
: "0" (__res) \
: "%d0"); \
__syscall_return(type,__res); \
}
#define _syscall1(type,name,atype,a) \
type name(atype a) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
register long __a __asm__ ("%d1") = (long)(a); \
__asm__ __volatile__ ("trap #0" \
: "=d" (__res) \
: "0" (__res), "d" (__a) \
: "%d0"); \
__syscall_return(type,__res); \
}
#define _syscall2(type,name,atype,a,btype,b) \
type name(atype a,btype b) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
register long __a __asm__ ("%d1") = (long)(a); \
register long __b __asm__ ("%d2") = (long)(b); \
__asm__ __volatile__ ("trap #0" \
: "=d" (__res) \
: "0" (__res), "d" (__a), "d" (__b) \
: "%d0"); \
__syscall_return(type,__res); \
}
#define _syscall3(type,name,atype,a,btype,b,ctype,c) \
type name(atype a,btype b,ctype c) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
register long __a __asm__ ("%d1") = (long)(a); \
register long __b __asm__ ("%d2") = (long)(b); \
register long __c __asm__ ("%d3") = (long)(c); \
__asm__ __volatile__ ("trap #0" \
: "=d" (__res) \
: "0" (__res), "d" (__a), "d" (__b), \
"d" (__c) \
: "%d0"); \
__syscall_return(type,__res); \
}
#define _syscall4(type,name,atype,a,btype,b,ctype,c,dtype,d) \
type name (atype a, btype b, ctype c, dtype d) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
register long __a __asm__ ("%d1") = (long)(a); \
register long __b __asm__ ("%d2") = (long)(b); \
register long __c __asm__ ("%d3") = (long)(c); \
register long __d __asm__ ("%d4") = (long)(d); \
__asm__ __volatile__ ("trap #0" \
: "=d" (__res) \
: "0" (__res), "d" (__a), "d" (__b), \
"d" (__c), "d" (__d) \
: "%d0"); \
__syscall_return(type,__res); \
}
#define _syscall5(type,name,atype,a,btype,b,ctype,c,dtype,d,etype,e) \
type name (atype a,btype b,ctype c,dtype d,etype e) \
{ \
register long __res __asm__ ("%d0") = __NR_##name; \
register long __a __asm__ ("%d1") = (long)(a); \
register long __b __asm__ ("%d2") = (long)(b); \
register long __c __asm__ ("%d3") = (long)(c); \
register long __d __asm__ ("%d4") = (long)(d); \
register long __e __asm__ ("%d5") = (long)(e); \
__asm__ __volatile__ ("trap #0" \
: "=d" (__res) \
: "0" (__res), "d" (__a), "d" (__b), \
"d" (__c), "d" (__d), "d" (__e) \
: "%d0"); \
__syscall_return(type,__res); \
}
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