#ifndef _BITS_SYSCALLS_H #define _BITS_SYSCALLS_H #ifndef _SYSCALL_H # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." #endif /* * This includes the `__NR_<name>' syscall numbers taken from the * Linux kernel header files. It also defines the traditional * `SYS_<name>' macros for older programs. */ #include <bits/sysnum.h> #ifndef __ASSEMBLER__ #include <errno.h> #define SYS_ify(syscall_name) (__NR_##syscall_name) #undef _syscall0 #define _syscall0(type,name) \ type name(void) \ { \ return (type)(INLINE_SYSCALL(name, 0)); \ } #undef _syscall1 #define _syscall1(type,name,type1,arg1) \ type name(type1 arg1) \ { \ return (type)(INLINE_SYSCALL(name, 1, arg1)); \ } #undef _syscall2 #define _syscall2(type,name,type1,arg1,type2,arg2) \ type name(type1 arg1, type2 arg2) \ { \ return (type)(INLINE_SYSCALL(name, 2, arg1, arg2)); \ } #undef _syscall3 #define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \ type name(type1 arg1, type2 arg2, type3 arg3) \ { \ return (type)(INLINE_SYSCALL(name, 3, arg1, \ arg2, arg3)); \ } #undef _syscall4 #define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3, \ type4,arg4) \ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \ { \ return (type)(INLINE_SYSCALL(name, 4, arg1, arg2, \ arg3, arg4)); \ } #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) \ { \ return (type)(INLINE_SYSCALL(name, 5, arg1, arg2, \ arg3, arg4, arg5)); \ } #undef _syscall6 #define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3, \ type4,arg4,type5,arg5,type6,arg6) \ type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, \ type5 arg5, type6 arg6) \ { \ return (type)(INLINE_SYSCALL(name, 6, arg1, arg2, arg3, \ arg4, arg5, arg6)); \ } #undef unlikely #define unlikely(x) __builtin_expect((x), 0) #undef INLINE_SYSCALL #define INLINE_SYSCALL(name, nr, args...) \ ({ \ unsigned _sys_result = INTERNAL_SYSCALL(name, , nr, args); \ if (unlikely(INTERNAL_SYSCALL_ERROR_P(_sys_result, ))) { \ __set_errno(INTERNAL_SYSCALL_ERRNO(_sys_result, )); \ _sys_result = (unsigned int) -1; \ } \ (int) _sys_result; \ }) #undef INTERNAL_SYSCALL_DECL #define INTERNAL_SYSCALL_DECL(err) do { } while(0) #undef INTERNAL_SYSCALL #define INTERNAL_SYSCALL(name, err, nr, args...) \ ({ \ register int _a1 __asm__("r12"); \ register int _scno __asm__("r8") = SYS_ify(name); \ LOAD_ARGS_##nr (args); \ __asm__ __volatile__("scall /* syscall " #name " */" \ : "=r" (_a1) \ : "r"(_scno) ASM_ARGS_##nr \ : "cc", "memory"); \ _a1; \ }) #undef INTERNAL_SYSCALL_ERROR_P #define INTERNAL_SYSCALL_ERROR_P(val, err) \ ((unsigned int)(val) >= 0xfffff001U) #undef INTERNAL_SYSCALL_ERRNO #define INTERNAL_SYSCALL_ERRNO(val, errr) (-(val)) #define LOAD_ARGS_0() do { } while(0) #define ASM_ARGS_0 #define LOAD_ARGS_1(a1) \ _a1 = (int) (a1); \ LOAD_ARGS_0() #define ASM_ARGS_1 ASM_ARGS_0, "r"(_a1) #define LOAD_ARGS_2(a1, a2) \ register int _a2 __asm__("r11") = (int)(a2); \ LOAD_ARGS_1(a1) #define ASM_ARGS_2 ASM_ARGS_1, "r"(_a2) #define LOAD_ARGS_3(a1, a2, a3) \ register int _a3 __asm__("r10") = (int)(a3); \ LOAD_ARGS_2(a1, a2) #define ASM_ARGS_3 ASM_ARGS_2, "r"(_a3) #define LOAD_ARGS_4(a1, a2, a3, a4) \ register int _a4 __asm__("r9") = (int)(a4); \ LOAD_ARGS_3(a1, a2, a3) #define ASM_ARGS_4 ASM_ARGS_3, "r"(_a4) #define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ register int _a5 __asm__("r5") = (int)(a5); \ LOAD_ARGS_4(a1, a2, a3, a4) #define ASM_ARGS_5 ASM_ARGS_4, "r"(_a5) #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ register int _a6 __asm__("r3") = (int)(a6); \ LOAD_ARGS_5(a1, a2, a3, a4, a5) #define ASM_ARGS_6 ASM_ARGS_5, "r"(_a6) #endif /* __ASSEMBLER__ */ #endif /* _BITS_SYSCALLS_H */