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/* Unlike the asm/unistd.h kernel header file (which this is partly based on),
* this file must be able to cope with PIC and non-PIC code. For some arches
* there is no difference. For x86 (which has far too few registers) there is
* a difference. Regardless, including asm/unistd.h is hereby officially
* forbidden. Don't do it. It is bad for you. */
#undef __syscall_return
#define __syscall_return(type, res) \
do { \
if ((unsigned long)(res) >= (unsigned long)(-125)) { \
errno = -(res); \
res = -1; \
} \
return (type) (res); \
} while (0)
#undef _syscall0
#define _syscall0(type,name) \
type name(void) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name)); \
__syscall_return(type,__res); \
}
#if defined(__PIC__)
/*
* PIC uses %ebx, so we need to save it during system calls
*/
#undef _syscall1
#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
long __res; \
__asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"r" ((long)(arg1))); \
__syscall_return(type,__res); \
}
#undef _syscall2
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2))); \
__syscall_return(type,__res); \
}
#undef _syscall3
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3))); \
__syscall_return(type,__res); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
long __res; \
__asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"r" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3)),"S" ((long)(arg4))); \
__syscall_return(type,__res); \
}
#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
long __res; \
__asm__ volatile ("push %%ebx; movl %2,%%ebx; int $0x80; pop %%ebx" \
: "=a" (__res) \
: "0" (__NR_##name),"m" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
__syscall_return(type,__res); \
}
#else /* not doing __PIC__ */
#undef _syscall1
#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1))); \
__syscall_return(type,__res); \
}
#undef _syscall2
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1,type2 arg2) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
__syscall_return(type,__res); \
}
#undef _syscall3
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1,type2 arg2,type3 arg3) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3))); \
__syscall_return(type,__res); \
}
#undef _syscall4
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3)),"S" ((long)(arg4))); \
__syscall_return(type,__res); \
}
#undef _syscall5
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \
type5,arg5) \
type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \
{ \
long __res; \
__asm__ volatile ("int $0x80" \
: "=a" (__res) \
: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
__syscall_return(type,__res); \
}
#endif /* __PIC__ */
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