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