138 lines
5.2 KiB
C
138 lines
5.2 KiB
C
/* $NetBSD: SYS.h,v 1.19 2009/12/14 01:07:41 matt Exp $ */
|
|
/* $FreeBSD$ */
|
|
|
|
/*-
|
|
* Copyright (c) 1996 Jonathan Stone
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Jonathan Stone for
|
|
* the NetBSD Project.
|
|
* 4. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/*-
|
|
* Copyright (c) 1991, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ralph Campbell.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* from: @(#)SYS.h 8.1 (Berkeley) 6/4/93
|
|
*/
|
|
|
|
#include <sys/syscall.h>
|
|
|
|
#include <machine/asm.h>
|
|
|
|
/*
|
|
* If compiling for shared libs, Emit sysV ABI PIC segment pseudo-ops.
|
|
*
|
|
* i) Emit .abicalls before .LEAF entrypoint, and .cpload/.cprestore after.
|
|
* ii) Do interprocedure jumps indirectly via t9, with the side-effect of
|
|
* preserving the callee's entry address in t9.
|
|
*/
|
|
#ifdef __ABICALLS__
|
|
.abicalls
|
|
# if defined(__mips_o32) || defined(__mips_o64)
|
|
# define PIC_PROLOGUE(x) SETUP_GP
|
|
# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); jr t9
|
|
# define PIC_RETURN() j ra
|
|
# else
|
|
# define PIC_PROLOGUE(x) SETUP_GP64(t3, x)
|
|
# define PIC_TAILCALL(l) PTR_LA t9, _C_LABEL(l); RESTORE_GP64; jr t9
|
|
# define PIC_RETURN() RESTORE_GP64; j ra
|
|
# endif
|
|
#else
|
|
# define PIC_PROLOGUE(x)
|
|
# define PIC_TAILCALL(l) j _C_LABEL(l)
|
|
# define PIC_RETURN() j ra
|
|
#endif /* __ABICALLS__ */
|
|
|
|
# define SYSTRAP(x) li v0,SYS_ ## x; syscall;
|
|
|
|
/*
|
|
* Do a syscall that cannot fail (sync, get{p,u,g,eu,eg)id)
|
|
*/
|
|
#define RSYSCALL_NOERROR(x) \
|
|
PSEUDO_NOERROR(x)
|
|
|
|
/*
|
|
* Do a normal syscall.
|
|
*/
|
|
#define RSYSCALL(x) \
|
|
PSEUDO(x)
|
|
|
|
/*
|
|
* Do a renamed or pseudo syscall (e.g., _exit()), where the entrypoint
|
|
* and syscall name are not the same.
|
|
*/
|
|
#define PSEUDO_NOERROR(x) \
|
|
LEAF(__sys_ ## x); \
|
|
.weak _C_LABEL(x); \
|
|
_C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
|
|
.weak _C_LABEL(__CONCAT(_,x)); \
|
|
_C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
|
|
SYSTRAP(x); \
|
|
j ra; \
|
|
END(__sys_ ## x)
|
|
|
|
#define PSEUDO(x) \
|
|
LEAF(__sys_ ## x); \
|
|
.weak _C_LABEL(x); \
|
|
_C_LABEL(x) = _C_LABEL(__CONCAT(__sys_,x)); \
|
|
.weak _C_LABEL(__CONCAT(_,x)); \
|
|
_C_LABEL(__CONCAT(_,x)) = _C_LABEL(__CONCAT(__sys_,x)); \
|
|
PIC_PROLOGUE(__sys_ ## x); \
|
|
SYSTRAP(x); \
|
|
bne a3,zero,err; \
|
|
PIC_RETURN(); \
|
|
err: \
|
|
PIC_TAILCALL(__cerror); \
|
|
END(__sys_ ## x)
|