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/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* 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.
*
* @(#)SYS.h 8.1 (Berkeley) 6/4/93
*
* from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp
* $NetBSD: SYS.h,v 1.19 2013/09/12 15:36:16 joerg Exp $
*/
#include <machine/asm.h>
#include <sys/syscall.h>
#include <machine/trap.h>
#ifdef __STDC__
#define _CAT(x,y) x##y
#else
#define _CAT(x,y) x/**/y
#endif
#ifdef __ELF__
#define CERROR _C_LABEL(__cerror)
#define CURBRK _C_LABEL(__curbrk)
#else
#define CERROR _ASM_LABEL(cerror)
#define CURBRK _ASM_LABEL(curbrk)
#endif
/*
* ERROR branches to cerror.
*/
#ifdef __PIC__
#define CALL(name) \
PIC_PROLOGUE(%g1, %g5); \
set name, %g5; \
ld [%g1 + %g5], %g5; \
jmp %g5; \
nop
#else
#define CALL(name) \
set name, %g1; \
jmp %g1; \
nop
#endif
#define ERROR() CALL(CERROR)
/*
* SYSCALL is used when further action must be taken before returning.
* Note that it adds a `nop' over what we could do, if we only knew
* what came at label 1....
*/
#define _SYSCALL(x,y) \
ENTRY(x); \
mov _CAT(SYS_,y), %g1; \
t ST_SYSCALL; \
bcc 1f; \
nop; \
ERROR(); \
1: /* next insn */
#define SYSCALL(x) \
_SYSCALL(x,x)
/*
* RSYSCALL is used when the system call should just return. Here we
* use the SYSCALL_G5RFLAG to put the `success' return address in %g5
* and avoid a branch.
*
* PSEUDO(x,y) is like RSYSCALL(y), except that the name is x.
*/
#define _RSYSCALL(x,y) \
ENTRY(x); \
mov (_CAT(SYS_,y)) | SYSCALL_G5RFLAG, %g1; \
add %o7, 8, %g5; \
t ST_SYSCALL; \
ERROR()
#define RSYSCALL(x) _RSYSCALL(x,x)
#define PSEUDO(x,y) _RSYSCALL(x,y)
/*
* WSYSCALL(weak,strong) is like RSYSCALL(weak),
* except that weak is a weak internal alias for the strong symbol.
*/
#ifdef WEAK_ALIAS
#define WSYSCALL(weak,strong) \
WEAK_ALIAS(weak,strong); \
PSEUDO(strong,weak)
#else
#define WSYSCALL(weak,strong) \
RSYSCALL(weak)
#endif
/*
* SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls that
* never fail.
*
* XXX - This should be optimized.
*/
#define SYSCALL_NOERROR(x) \
ENTRY(x); \
mov _CAT(SYS_,x), %g1; \
t ST_SYSCALL
/*
* RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls
* that never fail.
*
* PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y), except that the
* name is x.
*
* XXX - This should be optimized.
*/
#define _RSYSCALL_NOERROR(x,y) \
ENTRY(x); \
mov (_CAT(SYS_,y)) | SYSCALL_G5RFLAG, %g1; \
add %o7, 8, %g5; \
t ST_SYSCALL
#define RSYSCALL_NOERROR(x) _RSYSCALL_NOERROR(x,x)
#define PSEUDO_NOERROR(x,y) _RSYSCALL_NOERROR(x,y)
.globl CERROR
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