142 lines
4.5 KiB
C
142 lines
4.5 KiB
C
/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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 the University of
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* California, Berkeley and its contributors.
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* 4. 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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* @(#)SYS.h 8.1 (Berkeley) 6/4/93
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*
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* from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
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* $NetBSD: SYS.h,v 1.14 2002/05/26 12:24:58 wiz Exp $
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*/
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#include <machine/asm.h>
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#include <sys/syscall.h>
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#include <machine/trap.h>
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#ifdef __STDC__
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#define _CAT(x,y) x##y
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#else
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#define _CAT(x,y) x/**/y
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#endif
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#ifdef __ELF__
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#define CERROR _C_LABEL(__cerror)
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#define CURBRK _C_LABEL(__curbrk)
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#else
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#define CERROR _ASM_LABEL(cerror)
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#define CURBRK _ASM_LABEL(curbrk)
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#endif
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/*
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* ERROR branches to cerror. This is done with a macro so that I can
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* change it to be position independent later, if need be.
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*/
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#ifdef PIC
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#define CALL(name) \
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PIC_PROLOGUE(%g1,%g2); \
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ld [%g1+name],%g2; jmp %g2; nop
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#else
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#define CALL(name) \
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sethi %hi(name),%g1; or %lo(name),%g1,%g1; jmp %g1; nop
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#endif
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#define ERROR() CALL(CERROR)
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/*
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* SYSCALL is used when further action must be taken before returning.
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* Note that it adds a `nop' over what we could do, if we only knew what
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* came at label 1....
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*/
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#define _SYSCALL(x,y) \
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ENTRY(x); mov _CAT(SYS_,y),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1:
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#define SYSCALL(x) \
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_SYSCALL(x,x)
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/*
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* RSYSCALL is used when the system call should just return. Here
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* we use the SYSCALL_G2RFLAG to put the `success' return address in %g2
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* and avoid a branch.
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*/
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#define RSYSCALL(x) \
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ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
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t ST_SYSCALL; ERROR()
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/*
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* PSEUDO(x,y) is like RSYSCALL(y) except that the name is x.
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*/
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#define PSEUDO(x,y) \
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ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
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t ST_SYSCALL; ERROR()
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/*
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* WSYSCALL(weak,strong) is like RSYSCALL(weak), except that weak is
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* a weak internal alias for the strong symbol.
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*/
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#ifdef WEAK_ALIAS
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#define WSYSCALL(weak,strong) \
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WEAK_ALIAS(weak,strong); \
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PSEUDO(strong,weak)
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#else
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#define WSYSCALL(weak,strong) \
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RSYSCALL(weak)
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#endif
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/*
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* SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls
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* that never fail.
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*
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* XXX - This should be optimized.
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*/
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#define SYSCALL_NOERROR(x) \
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ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL
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/*
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* RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls
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* that never fail.
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*
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* XXX - This should be optimized.
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*/
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#define RSYSCALL_NOERROR(x) \
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ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
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t ST_SYSCALL
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/*
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* PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y) except that the name is x.
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*/
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#define PSEUDO_NOERROR(x,y) \
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ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \
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t ST_SYSCALL
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.globl CERROR
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