uclibc-ng/libc/sysdeps/linux/ia64/bits/syscalls.h

/* Copyright (C) 1999, 2000, 2002, 2003, 2004 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

/* 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 __ASSEMBLER__

#undef IA64_USE_NEW_STUB

#define SYS_ify(syscall_name)   __NR_##syscall_name

/* taken from asm-ia64/break.h */
#define __IA64_BREAK_SYSCALL	"0x100000"

#define _DO_SYSCALL(name, nr, args...) \
    LOAD_ARGS_##nr (args) \
    register long _r8 asm ("r8"); \
    register long _r10 asm ("r10"); \
    register long _r15 asm ("r15") = SYS_ify(name); \
    long _retval; \
    LOAD_REGS_##nr \
    __asm __volatile ("break " __IA64_BREAK_SYSCALL ";;\n\t" \
		: "=r" (_r8), "=r" (_r10), "=r" (_r15) ASM_OUTARGS_##nr \
		: "2" (_r15) ASM_ARGS_##nr \
		: "memory" ASM_CLOBBERS_##nr); \
    _retval = _r8; \
	if (_r10 == -1) { \
		__set_errno (_retval); \
		_retval = -1; \
	}

#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)

#ifdef IA64_USE_NEW_STUB
#define ASM_ARGS_0
#define ASM_ARGS_1	ASM_ARGS_0, "4" (_out0)
#define ASM_ARGS_2	ASM_ARGS_1, "5" (_out1)
#define ASM_ARGS_3	ASM_ARGS_2, "6" (_out2)
#define ASM_ARGS_4	ASM_ARGS_3, "7" (_out3)
#define ASM_ARGS_5	ASM_ARGS_4, "8" (_out4)
#define ASM_ARGS_6	ASM_ARGS_5, "9" (_out5)
#else
#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)
#endif

#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_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"

#ifdef IA64_USE_NEW_STUB
# define ASM_CLOBBERS_6	ASM_CLOBBERS_6_COMMON
#else
# define ASM_CLOBBERS_6	ASM_CLOBBERS_6_COMMON , "b7"
#endif



#define _syscall0(type,name) \
type name(void) \
{ \
	_DO_SYSCALL(name, 0); return (type) _retval; \
}

#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) \
{ \
	_DO_SYSCALL(name, 1, arg1); return (type) _retval; \
}

#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1, type2 arg2) \
{ \
	_DO_SYSCALL(name, 2, arg1, arg2); return (type) _retval; \
}

#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1, type2 arg2, type3 arg3) \
{ \
	_DO_SYSCALL(name, 3, arg1, arg2, arg3); return (type) _retval; \
}

#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) \
{ \
	_DO_SYSCALL(name, 4, arg1, arg2, arg3, arg4); return (type) _retval; \
}

#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) \
{ \
	_DO_SYSCALL(name, 5, arg1, arg2, arg3, arg4, arg5); return (type) _retval; \
}

#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) \
{ \
	_DO_SYSCALL(name, 6, arg1, arg2, arg3, arg4, arg5, arg6); return (type) _retval; \
}

#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */