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/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Ralph Campbell.
*
* 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.
*
* $OpenBSD: SYS.h,v 1.12 2016/05/07 19:05:22 guenther Exp $
*/
#include <sys/syscall.h>
#include <machine/asm.h>
/*
* We define a hidden alias with the prefix "_libc_" for each global symbol
* that may be used internally. By referencing _libc_x instead of x, other
* parts of libc prevent overriding by the application and avoid unnecessary
* relocations.
*/
#define _HIDDEN(x) _libc_##x
#define _HIDDEN_ALIAS(x,y) \
STRONG_ALIAS(_HIDDEN(x),y); \
.hidden _HIDDEN(x)
#define _HIDDEN_FALIAS(x,y) \
_HIDDEN_ALIAS(x,y); \
.type _HIDDEN(x),@function
/*
* For functions implemented in ASM that aren't syscalls.
* END_STRONG(x) Like DEF_STRONG() in C; for standard/reserved C names
* END_WEAK(x) Like DEF_WEAK() in C; for non-ISO C names
*/
#define END_STRONG(x) END(x); \
_HIDDEN_FALIAS(x,x); \
.size _HIDDEN(x), . - _HIDDEN(x)
#define END_WEAK(x) END_STRONG(x); .weak x
#define CERROR __cerror
.hidden CERROR
# define __ENTRY(p,x) ENTRY(p ## x)
# define __DO_SYSCALL(x) \
li v0,SYS_ ## x; \
syscall
# define __LEAF2(p,x,sz) LEAF(p ## x, sz) \
WEAK_ALIAS(x, p ## x);
# define __END2_HIDDEN(p,x) END(p ## x); \
_HIDDEN_FALIAS(x, p ## x); \
.size _HIDDEN(x), . - _HIDDEN(x)
# define __END2(p,x) __END2_HIDDEN(p,x); \
.size x, . - x
#define __PSEUDO_NOERROR(p,x,y) \
__LEAF2(p,x, 0); \
__DO_SYSCALL(y); \
j ra; \
__END2(p,x)
#define __PSEUDO(p,x,y) \
__LEAF2(p,x,32); \
PTR_SUBU sp,32; \
SETUP_GP64(16,_HIDDEN(x)); \
__DO_SYSCALL(y); \
bne a3,zero,1f; \
RESTORE_GP64; \
PTR_ADDU sp,32; \
j ra; \
1: LA t9,CERROR; \
RESTORE_GP64; \
PTR_ADDU sp,32; \
jr t9; \
__END2(p,x)
#define __PSEUDO_HIDDEN(p,x,y) \
LEAF(p ## x,32); \
PTR_SUBU sp,32; \
SETUP_GP64(16,_HIDDEN(x)); \
__DO_SYSCALL(y); \
bne a3,zero,1f; \
RESTORE_GP64; \
PTR_ADDU sp,32; \
j ra; \
1: LA t9,CERROR; \
RESTORE_GP64; \
PTR_ADDU sp,32; \
jr t9; \
__END2_HIDDEN(p,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 SYSLEAF(x, sz) __LEAF2(_thread_sys_,x, sz)
#define SYSLEAF_HIDDEN(x, sz) LEAF(_thread_sys_ ## x, sz)
#define SYSCALL_END(x) __END2(_thread_sys_,x)
#define SYSCALL_END_HIDDEN(x) __END2_HIDDEN(_thread_sys_,x)
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