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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.
*/
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
#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__("er0"); \
__asm__ __volatile__ ("mov.l %1,er0\n\t" \
"trapa #0\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name) \
: "cc"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
return (type)__res; \
}
#define _syscall1(type, name, atype, a) \
type name(atype a) \
{ \
register long __res __asm__("er0"); \
__asm__ __volatile__ ("mov.l %2, er1\n\t" \
"mov.l %1, er0\n\t" \
"trapa #0\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name), \
"g" ((long)a) \
: "cc", "er1"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
return (type)__res; \
}
#define _syscall2(type, name, atype, a, btype, b) \
type name(atype a, btype b) \
{ \
register long __res __asm__("er0"); \
__asm__ __volatile__ ("mov.l %3, er2\n\t" \
"mov.l %2, er1\n\t" \
"mov.l %1, er0\n\t" \
"trapa #0\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name), \
"g" ((long)a), \
"g" ((long)b) \
: "cc", "er1", "er2"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
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__("er0"); \
__asm__ __volatile__ ("mov.l %4, er3\n\t" \
"mov.l %3, er2\n\t" \
"mov.l %2, er1\n\t" \
"mov.l %1, er0\n\t" \
"trapa #0\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name), \
"g" ((long)a), \
"g" ((long)b), \
"g" ((long)c) \
: "cc", "er1", "er2", "er3"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
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__("er0"); \
__asm__ __volatile__ ("mov.l %5, er4\n\t" \
"mov.l %4, er3\n\t" \
"mov.l %3, er2\n\t" \
"mov.l %2, er1\n\t" \
"mov.l %1, er0\n\t" \
"trapa #0\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name), \
"g" ((long)a), \
"g" ((long)b), \
"g" ((long)c), \
"g" ((long)d) \
: "cc", "er1", "er2", "er3", "er4"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
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__("er0"); \
__asm__ __volatile__ ( \
"mov.l er5,@-sp\n\t" \
"mov.l %5, er4\n\t" \
"mov.l %4, er3\n\t" \
"mov.l %3, er2\n\t" \
"mov.l %2, er1\n\t" \
"mov.l %1, er0\n\t" \
"mov.l %6, er5\n\t" \
"trapa #0\n\t" \
"mov.l @sp+,er5\n\t" \
: "=r" (__res) \
: "ir" (__NR_##name), \
"g" ((long)a), \
"g" ((long)b), \
"g" ((long)c), \
"g" ((long)d), \
"m" ((long)e) \
: "cc", "er1", "er2", "er3", "er4"); \
if ((unsigned long)(__res) >= (unsigned long)(-125)) { \
errno = -__res; \
__res = -1; \
} \
return (type)__res; \
}
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