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/* 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...) \
(__extension__ \
({ \
DO_INLINE_SYSCALL_NCS (name, nr, args) \
if (unlikely (_r10 == -1)) \
{ \
__set_errno (_retval); \
_retval = -1; \
} \
_retval; \
}) \
)
#define INTERNAL_SYSCALL_DECL(err) long int err
#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
(__extension__ \
({ \
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 */
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