/* Copyright (C) 1999, 2000, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc. This file is part of the GNU C Library. Written by Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999. Based on code originally written by David Mosberger-Tang 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. */ #ifndef _BITS_SYSCALLS_H #define _BITS_SYSCALLS_H #ifndef _SYSCALL_H # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." #endif #ifndef __ASSEMBLER__ #include <errno.h> #undef IA64_USE_NEW_STUB #define __IA64_BREAK_SYSCALL 0x100000 /* mostly taken from glibc sysdeps/unix/sysv/linux/ia64/sysdep.h */ #define BREAK_INSN_1(num) "break " #num ";;\n\t" #define BREAK_INSN(num) BREAK_INSN_1(num) /* On IA-64 we have stacked registers for passing arguments. The "out" registers end up being the called function's "in" registers. Also, since we have plenty of registers we have two return values from a syscall. r10 is set to -1 on error, whilst r8 contains the (non-negative) errno on error or the return value on success. */ # define DO_INLINE_SYSCALL_NCS(name, nr, args...) \ LOAD_ARGS_##nr (args) \ register long _r8 __asm__ ("r8"); \ register long _r10 __asm__ ("r10"); \ register long _r15 __asm__ ("r15") = name; \ long _retval; \ LOAD_REGS_##nr \ __asm __volatile (BREAK_INSN (__IA64_BREAK_SYSCALL) \ : "=r" (_r8), "=r" (_r10), "=r" (_r15) \ ASM_OUTARGS_##nr \ : "2" (_r15) ASM_ARGS_##nr \ : "memory" ASM_CLOBBERS_##nr); \ _retval = _r8; #define INLINE_SYSCALL_NCS(name, nr, args...) \ ({ \ DO_INLINE_SYSCALL_NCS (name, nr, args) \ if (_r10 == -1) \ { \ __set_errno (_retval); \ _retval = -1; \ } \ _retval; }) #define INTERNAL_SYSCALL_DECL(err) long int err #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ DO_INLINE_SYSCALL_NCS (name, nr, args) \ err = _r10; \ _retval; }) #define INTERNAL_SYSCALL_ERROR_P(val, err) (err == -1) #define INTERNAL_SYSCALL_ERRNO(val, err) (val) #define LOAD_ARGS_0() #define LOAD_REGS_0 #define LOAD_ARGS_1(a1) \ long _arg1 = (long) (a1); \ LOAD_ARGS_0 () #define LOAD_REGS_1 \ register long _out0 __asm__ ("out0") = _arg1; \ LOAD_REGS_0 #define LOAD_ARGS_2(a1, a2) \ long _arg2 = (long) (a2); \ LOAD_ARGS_1 (a1) #define LOAD_REGS_2 \ register long _out1 __asm__ ("out1") = _arg2; \ LOAD_REGS_1 #define LOAD_ARGS_3(a1, a2, a3) \ long _arg3 = (long) (a3); \ LOAD_ARGS_2 (a1, a2) #define LOAD_REGS_3 \ register long _out2 __asm__ ("out2") = _arg3; \ LOAD_REGS_2 #define LOAD_ARGS_4(a1, a2, a3, a4) \ long _arg4 = (long) (a4); \ LOAD_ARGS_3 (a1, a2, a3) #define LOAD_REGS_4 \ register long _out3 __asm__ ("out3") = _arg4; \ LOAD_REGS_3 #define LOAD_ARGS_5(a1, a2, a3, a4, a5) \ long _arg5 = (long) (a5); \ LOAD_ARGS_4 (a1, a2, a3, a4) #define LOAD_REGS_5 \ register long _out4 __asm__ ("out4") = _arg5; \ LOAD_REGS_4 #define LOAD_ARGS_6(a1, a2, a3, a4, a5, a6) \ long _arg6 = (long) (a6); \ LOAD_ARGS_5 (a1, a2, a3, a4, a5) #define LOAD_REGS_6 \ register long _out5 __asm__ ("out5") = _arg6; \ LOAD_REGS_5 #define ASM_OUTARGS_0 #define ASM_OUTARGS_1 ASM_OUTARGS_0, "=r" (_out0) #define ASM_OUTARGS_2 ASM_OUTARGS_1, "=r" (_out1) #define ASM_OUTARGS_3 ASM_OUTARGS_2, "=r" (_out2) #define ASM_OUTARGS_4 ASM_OUTARGS_3, "=r" (_out3) #define ASM_OUTARGS_5 ASM_OUTARGS_4, "=r" (_out4) #define ASM_OUTARGS_6 ASM_OUTARGS_5, "=r" (_out5) #define ASM_ARGS_0 #define ASM_ARGS_1 ASM_ARGS_0, "3" (_out0) #define ASM_ARGS_2 ASM_ARGS_1, "4" (_out1) #define ASM_ARGS_3 ASM_ARGS_2, "5" (_out2) #define ASM_ARGS_4 ASM_ARGS_3, "6" (_out3) #define ASM_ARGS_5 ASM_ARGS_4, "7" (_out4) #define ASM_ARGS_6 ASM_ARGS_5, "8" (_out5) #define ASM_CLOBBERS_0 ASM_CLOBBERS_1, "out0" #define ASM_CLOBBERS_1 ASM_CLOBBERS_2, "out1" #define ASM_CLOBBERS_2 ASM_CLOBBERS_3, "out2" #define ASM_CLOBBERS_3 ASM_CLOBBERS_4, "out3" #define ASM_CLOBBERS_4 ASM_CLOBBERS_5, "out4" #define ASM_CLOBBERS_5 ASM_CLOBBERS_6, "out5" #define ASM_CLOBBERS_6 ASM_CLOBBERS_6_COMMON , "b7" #define ASM_CLOBBERS_6_COMMON , "out6", "out7", \ /* Non-stacked integer registers, minus r8, r10, r15. */ \ "r2", "r3", "r9", "r11", "r12", "r13", "r14", "r16", "r17", "r18", \ "r19", "r20", "r21", "r22", "r23", "r24", "r25", "r26", "r27", \ "r28", "r29", "r30", "r31", \ /* Predicate registers. */ \ "p6", "p7", "p8", "p9", "p10", "p11", "p12", "p13", "p14", "p15", \ /* Non-rotating fp registers. */ \ "f6", "f7", "f8", "f9", "f10", "f11", "f12", "f13", "f14", "f15", \ /* Branch registers. */ \ "b6" #endif /* __ASSEMBLER__ */ #endif /* _BITS_SYSCALLS_H */