/* $OpenBSD: SYS.h,v 1.18 2023/12/10 16:45:52 deraadt Exp $ */ /*- * Copyright (c) 1992, 1993 * The Regents of the University of California. All rights reserved. * * This software was developed by the Computer Systems Engineering group * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and * contributed to Berkeley. * * 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. * * @(#)SYS.h 8.1 (Berkeley) 6/4/93 * * from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp * $NetBSD: SYS.h,v 1.6 2001/07/23 07:26:50 thorpej Exp $ */ #include "DEFS.h" #include <sys/syscall.h> #include <machine/trap.h> /* offsetof(struct tib, tib_errno) - offsetof(struct tib, __tib_tcb) */ #define TCB_OFFSET_ERRNO 24 #define _CAT(x,y) x##y #define __ENTRY(p,x) ENTRY(_CAT(p,x)) ; .weak x; x = _CAT(p,x) #define __ENTRY_HIDDEN(p,x) ENTRY(_CAT(p,x)) #define __END_HIDDEN(p,x) END(_CAT(p,x)); \ _HIDDEN_FALIAS(x, _CAT(p,x)); \ END(_HIDDEN(x)) #define __END(p,x) __END_HIDDEN(p,x); END(x) /* * ERROR sets the thread's errno and returns */ #define ERROR() \ st %o0, [%g7 + TCB_OFFSET_ERRNO]; \ retl; \ mov -1, %o0 /* * SYSCALL is used when further action must be taken before returning. * Note that it adds a `nop' over what we could do, if we only knew what * came at label 1.... */ #define _SYSCALL(p,x,y) \ __ENTRY(p,x); \ mov _CAT(SYS_,y),%g1; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,y), 97b); \ bcc 1f; \ nop; \ ERROR(); \ 1: #define _SYSCALL_HIDDEN(p,x,y) \ __ENTRY_HIDDEN(p,x); \ mov _CAT(SYS_,y),%g1; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,y), 97b); \ bcc 1f; \ nop; \ ERROR(); \ 1: #define __SYSCALL(p,x) \ _SYSCALL(p,x,x) #define __SYSCALL_HIDDEN(p,x) \ _SYSCALL_HIDDEN(p,x,x) /* * RSYSCALL is used when the system call should just return. Here * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2 * and avoid a branch. */ #define __RSYSCALL(p,x) \ __ENTRY(p,x); \ mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; \ add %o7,8,%g2; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,x), 97b); \ ERROR(); \ __END(p,x) #define __RSYSCALL_HIDDEN(p,x) \ __ENTRY_HIDDEN(p,x); \ mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; \ add %o7,8,%g2; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,x), 97b); \ ERROR(); \ __END_HIDDEN(p,x) /* * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x. */ #define __PSEUDO(p,x,y) \ __ENTRY(p,x); \ mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; \ add %o7,8,%g2; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,y), 97b); \ ERROR(); \ __END(p,x) /* * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls * that never fail. * * XXX - This should be optimized. */ #define __SYSCALL_NOERROR(p,x) \ __ENTRY(p,x); \ mov _CAT(SYS_,x),%g1; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,x), 97b) /* * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls * that never fail. * * XXX - This should be optimized. */ #define __RSYSCALL_NOERROR(p,x) \ __ENTRY(p,x); \ mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; \ add %o7,8,%g2; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,x), 97b); \ __END(p,x) /* * PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y) except that the name is x. */ #define __PSEUDO_NOERROR(p,x,y) \ __ENTRY(p,x); \ mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; \ add %o7,8,%g2; \ 97: t ST_SYSCALL; \ PINSYSCALL(_CAT(SYS_,y), 97b); \ __END(p,x) /* * SYSENTRY is for functions that pretend to be syscalls. */ #define SYSCALL(x) __SYSCALL(_thread_sys_,x) #define RSYSCALL(x) __RSYSCALL(_thread_sys_,x) #define RSYSCALL_HIDDEN(x) __RSYSCALL_HIDDEN(_thread_sys_,x) #define RSYSCALL_NOERROR(x,y) __RSYSCALL_NOERROR(_thread_sys_,x,y) #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) #define SYSENTRY_HIDDEN(x) __ENTRY_HIDDEN(_thread_sys_,x) #define SYSCALL_END(x) __END(_thread_sys_,x) #define SYSCALL_END_HIDDEN(x) __END_HIDDEN(_thread_sys_,x)
