diff options
Diffstat (limited to 'libc/sysdeps/linux/arm/bits')
| -rw-r--r-- | libc/sysdeps/linux/arm/bits/syscalls.h | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/arm/bits/syscalls.h b/libc/sysdeps/linux/arm/bits/syscalls.h new file mode 100644 index 000000000..42b20ffea --- /dev/null +++ b/libc/sysdeps/linux/arm/bits/syscalls.h @@ -0,0 +1,119 @@ +/* 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); \ +} + |