/* Copyright (C) 1992, 1993, 1995, 1996, 1997, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper, , August 1995. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifdef __ASSEMBLER__ #include #include #endif /* There is some commonality. */ #include /* For Linux we can use the system call table in the header file /usr/include/asm/unistd.h of the kernel. But these symbols do not follow the SYS_* syntax so we have to redefine the `SYS_ify' macro here. */ #undef SYS_ify #ifdef __STDC__ # define SYS_ify(syscall_name) __NR_##syscall_name #else # define SYS_ify(syscall_name) __NR_/**/syscall_name #endif /* Define some aliases to make automatic syscall generation work properly. The SYS_* variants are for the benefit of the files in sysdeps/unix. */ #define __NR_getpid __NR_getxpid #define __NR_getuid __NR_getxuid #define __NR_getgid __NR_getxgid #define SYS_getpid __NR_getxpid #define SYS_getuid __NR_getxuid #define SYS_getgid __NR_getxgid /* * Some syscalls no Linux program should know about: */ #define __NR_osf_sigprocmask 48 #define __NR_osf_shmat 209 #define __NR_osf_getsysinfo 256 #define __NR_osf_setsysinfo 257 /* * In order to get the hidden arguments for rt_sigaction set up * properly, we need to call the assembly version. Detect this in the * INLINE_SYSCALL macro, and fail to expand inline in that case. */ #undef INLINE_SYSCALL #define INLINE_SYSCALL(name, nr, args...) \ (__NR_##name == __NR_rt_sigaction \ ? __syscall_##name(args) \ : INLINE_SYSCALL1(name, nr, args)) #define INLINE_SYSCALL1(name, nr, args...) \ ({ \ long _sc_ret, _sc_err; \ inline_syscall##nr(name, args); \ if (_sc_err) \ { \ __set_errno (_sc_ret); \ _sc_ret = -1L; \ } \ _sc_ret; \ }) #define inline_syscall_clobbers \ "$1", "$2", "$3", "$4", "$5", "$6", "$7", "$8", \ "$22", "$23", "$24", "$25", "$27", "$28", "memory" /* It is moderately important optimization-wise to limit the lifetime of the hard-register variables as much as possible. Thus we copy in/out as close to the asm as possible. */ #define inline_syscall0(name) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = __NR_##name; \ __asm__("callsys # %0 %1 <= %2" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall1(name,arg1) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ __asm__("callsys # %0 %1 <= %2 %3" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall2(name,arg1,arg2) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ __asm__("callsys # %0 %1 <= %2 %3 %4" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall3(name,arg1,arg2,arg3) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_18 __asm__("$18"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ _sc_18 = (long) (arg3); \ __asm__("callsys # %0 %1 <= %2 %3 %4 %5" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \ "r"(_sc_18) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall4(name,arg1,arg2,arg3,arg4) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_18 __asm__("$18"); \ register long _sc_19 __asm__("$19"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ _sc_18 = (long) (arg3); \ _sc_19 = (long) (arg4); \ __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \ "r"(_sc_18), "1"(_sc_19) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall5(name,arg1,arg2,arg3,arg4,arg5) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_18 __asm__("$18"); \ register long _sc_19 __asm__("$19"); \ register long _sc_20 __asm__("$20"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ _sc_18 = (long) (arg3); \ _sc_19 = (long) (arg4); \ _sc_20 = (long) (arg5); \ __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \ "r"(_sc_18), "1"(_sc_19), "r"(_sc_20) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ } #define inline_syscall6(name,arg1,arg2,arg3,arg4,arg5,arg6) \ { \ register long _sc_0 __asm__("$0"); \ register long _sc_16 __asm__("$16"); \ register long _sc_17 __asm__("$17"); \ register long _sc_18 __asm__("$18"); \ register long _sc_19 __asm__("$19"); \ register long _sc_20 __asm__("$20"); \ register long _sc_21 __asm__("$21"); \ \ _sc_0 = __NR_##name; \ _sc_16 = (long) (arg1); \ _sc_17 = (long) (arg2); \ _sc_18 = (long) (arg3); \ _sc_19 = (long) (arg4); \ _sc_20 = (long) (arg5); \ _sc_21 = (long) (arg6); \ __asm__("callsys # %0 %1 <= %2 %3 %4 %5 %6 %7 %8" \ : "=r"(_sc_0), "=r"(_sc_19) \ : "0"(_sc_0), "r"(_sc_16), "r"(_sc_17), \ "r"(_sc_18), "1"(_sc_19), "r"(_sc_20), \ "r"(_sc_21) \ : inline_syscall_clobbers); \ _sc_ret = _sc_0, _sc_err = _sc_19; \ }