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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. */
- #include <features.h>
- // TODO -- Add support for __UCLIBC_USE_UNIFIED_SYSCALL__
- #define __sys2(x) #x
- #define __sys1(x) __sys2(x)
- #ifndef __syscall
- #define __syscall(name) "swi\t" __sys1(__NR_##name) "\n\t"
- #endif
- #define __syscall_return(type, res) \
- do { \
- if ((unsigned long)(res) >= (unsigned long)(-125)) { \
- errno = -(res); \
- res = -1; \
- } \
- return (type) (res); \
- } while (0)
- #define _syscall0(type,name) \
- type name(void) { \
- long __res; \
- __asm__ __volatile__ ( \
- __syscall(name) \
- "mov %0,r0" \
- :"=r" (__res) : : "r0","lr"); \
- __syscall_return(type,__res); \
- }
- #define _syscall1(type,name,type1,arg1) \
- type name(type1 arg1) { \
- long __res; \
- __asm__ __volatile__ ( \
- "mov\tr0,%1\n\t" \
- __syscall(name) \
- "mov %0,r0" \
- : "=r" (__res) \
- : "r" ((long)(arg1)) \
- : "r0","lr"); \
- __syscall_return(type,__res); \
- }
- #define _syscall2(type,name,type1,arg1,type2,arg2) \
- type name(type1 arg1,type2 arg2) { \
- long __res; \
- __asm__ __volatile__ ( \
- "mov\tr0,%1\n\t" \
- "mov\tr1,%2\n\t" \
- __syscall(name) \
- "mov\t%0,r0" \
- : "=r" (__res) \
- : "r" ((long)(arg1)),"r" ((long)(arg2)) \
- : "r0","r1","lr"); \
- __syscall_return(type,__res); \
- }
- #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
- type name(type1 arg1,type2 arg2,type3 arg3) { \
- long __res; \
- __asm__ __volatile__ ( \
- "mov\tr0,%1\n\t" \
- "mov\tr1,%2\n\t" \
- "mov\tr2,%3\n\t" \
- __syscall(name) \
- "mov\t%0,r0" \
- : "=r" (__res) \
- : "r" ((long)(arg1)),"r" ((long)(arg2)),"r" ((long)(arg3)) \
- : "r0","r1","r2","lr"); \
- __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__ ( \
- "mov\tr0,%1\n\t" \
- "mov\tr1,%2\n\t" \
- "mov\tr2,%3\n\t" \
- "mov\tr3,%4\n\t" \
- __syscall(name) \
- "mov\t%0,r0" \
- : "=r" (__res) \
- : "r" ((long)(arg1)),"r" ((long)(arg2)), \
- "r" ((long)(arg3)),"r" ((long)(arg4)) \
- : "r0","r1","r2","r3","lr"); \
- __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__ ( \
- "mov\tr0,%1\n\t" \
- "mov\tr1,%2\n\t" \
- "mov\tr2,%3\n\t" \
- "mov\tr3,%4\n\t" \
- "mov\tr4,%5\n\t" \
- __syscall(name) \
- "mov\t%0,r0" \
- : "=r" (__res) \
- : "r" ((long)(arg1)),"r" ((long)(arg2)), \
- "r" ((long)(arg3)),"r" ((long)(arg4)), \
- "r" ((long)(arg5)) \
- : "r0","r1","r2","r3","r4","lr"); \
- __syscall_return(type,__res); \
- }
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