mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-21 11:13:30 +00:00
133 lines
3.5 KiB
C
133 lines
3.5 KiB
C
/* $FreeBSD$ */
|
|
/* 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? */ \
|
|
CALLSYS_ERROR(name)
|
|
|
|
#define PRSYSCALL(name) \
|
|
PLEAF(name,0); /* XXX # of args? */ \
|
|
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
|