#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 __set_errno # define __set_errno(val) (*__errno_location ()) = (val) #endif #ifndef SYS_ify # define SYS_ify(syscall_name) (__NR_##syscall_name) #endif /* Some of the sneaky macros in the code were taken from glibc-2.3.2/sysdeps/unix/sysv/linux/arm/sysdep.h */ #ifndef __ASSEMBLER__ #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 _syscall7 #define _syscall7(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4, \ type5,arg5,type6,arg6,type7,arg7) \ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5, type6 arg6,type7 arg7) \ { \ return (type) (INLINE_SYSCALL(name, 7, arg1, arg2, arg3, arg4, arg5, arg6, arg7)); \ } #undef INLINE_SYSCALL #define INLINE_SYSCALL(name, nr, args...) \ ({ unsigned int _sys_result = INTERNAL_SYSCALL (name, , nr, args); \ if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sys_result, ), 0)) \ { \ __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...) \ ({ unsigned int _sys_result; \ { \ register int _a1 asm ("a1"); \ LOAD_ARGS_##nr (args) \ asm volatile ("swi %1 @ syscall " #name \ : "=r" (_a1) \ : "i" (SYS_ify(name)) ASM_ARGS_##nr \ : "memory"); \ _sys_result = _a1; \ } \ (int) _sys_result; }) #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, err) (-(val)) #define LOAD_ARGS_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 ("a2") = (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 ("a3") = (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 ("a4") = (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 _v1 asm ("v1") = (int) (a5); \ LOAD_ARGS_4 (a1, a2, a3, a4) #define ASM_ARGS_5 ASM_ARGS_4, "r" (_v1) #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ register int _v2 asm ("v2") = (int) (a6); \ LOAD_ARGS_5 (a1, a2, a3, a4, a5) #define ASM_ARGS_6 ASM_ARGS_5, "r" (_v2) #define LOAD_ARGS_7(a1, a2, a3, a4, a5, a6, a7) \ register int _v3 asm ("v3") = (int) (a7); \ LOAD_ARGS_6 (a1, a2, a3, a4, a5, a6) #define ASM_ARGS_7 ASM_ARGS_6, "r" (_v3) #endif /* __ASSEMBLER__ */ #endif /* _BITS_SYSCALLS_H */