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/* $FreeBSD$ */
/* From: NetBSD: SYS.h,v 1.5 1997/05/02 18:15:15 kleink Exp */
/*
* Copyright (c) 1994, 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <machine/asm.h>
#ifdef __NETBSD_SYSCALLS
#include <sys/netbsd_syscall.h>
#else
#include <sys/syscall.h>
#endif
#define CALLSYS_ERROR(name) \
CALLSYS_NOERROR(name); \
br gp, LLABEL(name,0); \
LLABEL(name,0): \
LDGP(gp); \
beq a3, LLABEL(name,1); \
jmp zero, .cerror; \
LLABEL(name,1):
#define SYSCALL(name) \
LEAF(__CONCAT(_,name),0); /* XXX # of args? */ \
WEAK_ALIAS(name, __CONCAT(_,name)); \
CALLSYS_ERROR(name)
#define SYSCALL_NOERROR(name) \
LEAF(name,0); /* XXX # of args? */ \
CALLSYS_NOERROR(name)
#define RSYSCALL(name) \
SYSCALL(name); \
RET; \
END(__CONCAT(_,name))
#define RSYSCALL_NOERROR(name) \
SYSCALL_NOERROR(name); \
RET; \
END(name)
#define PSEUDO(label,name) \
LEAF(__CONCAT(_,label),0); /* XXX # of args? */ \
WEAK_ALIAS(label, __CONCAT(_,label)); \
CALLSYS_ERROR(name); \
RET; \
END(__CONCAT(_,label));
#define PSEUDO_NOERROR(label,name) \
LEAF(label,0); /* XXX # of args? */ \
CALLSYS_NOERROR(name); \
RET; \
END(label);
/*
* Design note:
*
* The macros PSYSCALL() and PRSYSCALL() are intended for use where a
* syscall needs to be renamed in the threaded library. When building
* a normal library, they default to the traditional SYSCALL() and
* RSYSCALL(). This avoids the need to #ifdef _THREAD_SAFE everywhere
* that the renamed function needs to be called.
*/
#ifdef _THREAD_SAFE
/*
* For the thread_safe versions, we prepend _thread_sys_ to the function
* name so that the 'C' wrapper can go around the real name.
*/
#define PCALL(name) \
CALL(___CONCAT(_thread_sys_,name))
#define PLEAF(name, args) \
LEAF(___CONCAT(_thread_sys_,name),args)
#define PEND(name) \
END(___CONCAT(_thread_sys_,name))
#define PSYSCALL(name) \
PLEAF(name,0); /* XXX # of args? */ \
WEAK_ALIAS(__CONCAT(_,name), __CONCAT(_thread_sys_,name)); \
WEAK_ALIAS(name, __CONCAT(_,name)); \
CALLSYS_ERROR(name)
#define PRSYSCALL(name) \
PLEAF(name,0); /* XXX # of args? */ \
WEAK_ALIAS(__CONCAT(_,name), __CONCAT(_thread_sys_,name)); \
WEAK_ALIAS(name, __CONCAT(_,name)); \
CALLSYS_ERROR(name) \
RET; \
PEND(name)
#define PPSEUDO(label,name) \
PLEAF(label,0); /* XXX # of args? */ \
CALLSYS_ERROR(name); \
RET; \
PEND(label)
#else
/*
* The non-threaded library defaults to traditional syscalls where
* the function name matches the syscall name.
*/
#define PSYSCALL(x) SYSCALL(x)
#define PRSYSCALL(x) RSYSCALL(x)
#define PPSEUDO(x,y) PSEUDO(x,y)
#define PLEAF(x,y) LEAF(x,y)
#define PEND(x) END(x)
#define PCALL(x) CALL(x)
#endif
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