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/* $NetBSD: SYS.h,v 1.15 2013/08/19 22:13:34 matt Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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 5.5 (Berkeley) 5/7/91
*/
#define _TEXT_SECTION .section .text.hot, "ax"
#include <machine/asm.h>
#include <sys/syscall.h>
#include <arm/swi.h>
#ifndef __STDC__
#error __STDC__ not defined
#endif
#if !defined(__thumb__)
#define SYSTRAP(x) svc #SWI_OS_NETBSD | SYS_ ## x
#else
.macro emitsvc x
mov ip, r0
.ifeq \x / 256
movs r0, #\x
.else
#if defined(_ARM_ARCH_7)
movw r0, #\x
#else
.ifeq (\x & 3)
movs r0, #(\x / 4)
lsls r0, r0, #3
.else
.ifeq (\x & 1)
movs r0, #(\x / 2)
lsls r0, r0, #1
.else
movs r0, #(\x / 256)
lsls r0, r0, #8
adds r0, r0, #(\x & 255)
.endif
.endif
#endif /* !_ARM_ARCH_7 */
.endif
svc #255
.endm
#define SYSTRAP(x) emitsvc SYS_ ## x
#endif /* __thumb__ */
#define CERROR _C_LABEL(__cerror)
#define CURBRK _C_LABEL(__curbrk)
#define _SYSCALL_NOERROR(x,y) \
ENTRY(x); \
SYSTRAP(y)
#if !defined(__thumb__) || defined(_ARM_ARCH_T2)
#define _INVOKE_CERROR() bcs CERROR
#else
#define _INVOKE_CERROR() \
bcc 86f; push {r3,lr}; bl CERROR; pop {r3,pc}; 86:
#endif
#define _SYSCALL(x, y) \
_SYSCALL_NOERROR(x,y); \
_INVOKE_CERROR()
#define SYSCALL_NOERROR(x) \
_SYSCALL_NOERROR(x,x)
#define SYSCALL(x) \
_SYSCALL(x,x)
#define PSEUDO_NOERROR(x,y) \
_SYSCALL_NOERROR(x,y); \
RET; \
END(x)
#define PSEUDO(x,y) \
_SYSCALL(x,y); \
RET; \
END(x)
#define RSYSCALL_NOERROR(x) \
PSEUDO_NOERROR(x,x)
#define RSYSCALL(x) \
PSEUDO(x,x)
#ifdef WEAK_ALIAS
#define WSYSCALL(weak,strong) \
WEAK_ALIAS(weak,strong); \
PSEUDO(strong,weak)
#else
#define WSYSCALL(weak,strong) \
PSEUDO(weak,weak)
#endif
.hidden CERROR
.globl CERROR
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