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/* $OpenBSD: SYS.h,v 1.19 2015/04/07 01:27:06 guenther Exp $*/
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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
*/
#include <sys/syscall.h>
#include <machine/asm.h>
#define __CONCAT(p,x) p##x
#define __ENTRY(p,x) ENTRY(__CONCAT(p,x))
#define __END(p,x) END(__CONCAT(p,x))
#define __SYSCALLNAME(p,x) __CONCAT(p,x)
#define __ALIAS(prefix,name) WEAK_ALIAS(name,__CONCAT(prefix,name))
#ifdef __PIC__
#define CERROR __cerror#plt
#define PIC_SAVE(reg) or reg, %r25, %r0
#define PIC_RESTORE(reg) or %r25, reg, %r0
#define PIC_SETUP \
or %r11, %r0, %r1; \
or.u %r25, %r0, %hi16(.Lpic#abdiff); \
bsr.n .Lpic; \
or %r25, %r25, %lo16(.Lpic#abdiff); \
.Lpic: add %r25, %r25, %r1; \
or %r1, %r0, %r11
#if __PIC__ > 1
#define PIC_LOAD(reg,sym) \
or.u %r11, %r0, %hi16(__CONCAT(sym,#got_rel)); \
or %r11, %r11, %lo16(__CONCAT(sym,#got_rel)); \
ld reg, %r25, %r11
#define PIC_STORE(reg,sym) \
or.u %r11, %r0, %hi16(__CONCAT(sym,#got_rel)); \
or %r11, %r11, %lo16(__CONCAT(sym,#got_rel)); \
st reg, %r25, %r11
#else /* -fpic */
#define PIC_LOAD(reg,sym) \
ld %r11, %r25, __CONCAT(sym,#got_rel); \
ld reg, %r11, %r0
#define PIC_STORE(reg,sym) \
ld %r11, %r25, __CONCAT(sym,#got_rel); \
st reg, %r11, %r0
#endif
#else
#define CERROR __cerror
#endif
#define __DO_SYSCALL(x) \
or %r13, %r0, __SYSCALLNAME(SYS_,x); \
tb0 0, %r0, 450
#define __SYSCALL__NOERROR(p,x,y) \
__ENTRY(p,x); \
__ALIAS(p,x); \
__DO_SYSCALL(y)
#define __SYSCALL_HIDDEN__NOERROR(p,x,y) \
__ENTRY(p,x); \
__DO_SYSCALL(y)
#define __SYSCALL(p,x,y) \
__SYSCALL__NOERROR(p,x,y); \
br CERROR
#define __SYSCALL_HIDDEN(p,x,y) \
__SYSCALL_HIDDEN__NOERROR(p,x,y); \
br CERROR
#define __PSEUDO_NOERROR(p,x,y) \
__SYSCALL__NOERROR(p,x,y); \
jmp %r1; \
__END(p,x)
#define __PSEUDO(p,x,y) \
__SYSCALL(p,x,y); \
jmp %r1; \
__END(p,x)
#define __PSEUDO_HIDDEN(p,x,y) \
__SYSCALL_HIDDEN(p,x,y); \
jmp %r1; \
__END(p,x)
/*
* System calls entry points are really named _thread_sys_{syscall},
* and weakly aliased to the name {syscall}. This allows the thread
* library to replace system calls at link time.
*/
#define SYSCALL(x) __SYSCALL(_thread_sys_,x,x)
#define RSYSCALL(x) __PSEUDO(_thread_sys_,x,x)
#define RSYSCALL_HIDDEN(x) __PSEUDO_HIDDEN(_thread_sys_,x,x)
#define PSEUDO(x,y) __PSEUDO(_thread_sys_,x,y)
#define PSEUDO_NOERROR(x,y) __PSEUDO_NOERROR(_thread_sys_,x,y)
#define SYSENTRY(x) __ENTRY(_thread_sys_,x); \
__ALIAS(_thread_sys_,x)
#define ASMSTR .asciz
.globl __cerror
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