Split you the syscall handling to a separate file.
This commit is contained in:
Andrew Turner
parent
0b060244ab
commit
293b5c2221
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=272356
196
sys/arm/arm/syscall.c
Normal file
196
sys/arm/arm/syscall.c
Normal file
@ -0,0 +1,196 @@
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/* $NetBSD: fault.c,v 1.45 2003/11/20 14:44:36 scw Exp $ */
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/*-
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* Copyright 2004 Olivier Houchard
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* Copyright 2003 Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Steve C. Woodford for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*-
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* Copyright (c) 1994-1997 Mark Brinicombe.
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* Copyright (c) 1994 Brini.
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* All rights reserved.
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*
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* This code is derived from software written for Brini by Mark Brinicombe
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Brini.
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* 4. The name of the company nor the name of the author may be used to
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* endorse or promote products derived from this software without specific
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* prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BRINI ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL BRINI OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* RiscBSD kernel project
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*
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* fault.c
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*
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* Fault handlers
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*
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* Created : 28/11/94
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/syscall.h>
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#include <sys/sysent.h>
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#include <sys/signalvar.h>
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#include <sys/ptrace.h>
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#include <sys/pioctl.h>
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#include <machine/frame.h>
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void swi_handler(struct trapframe *);
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static __inline void
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call_trapsignal(struct thread *td, int sig, u_long code)
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{
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ksiginfo_t ksi;
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ksiginfo_init_trap(&ksi);
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ksi.ksi_signo = sig;
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ksi.ksi_code = (int)code;
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trapsignal(td, &ksi);
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}
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int
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cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
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{
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struct proc *p;
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register_t *ap;
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int error;
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sa->code = td->td_frame->tf_r7;
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ap = &td->td_frame->tf_r0;
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if (sa->code == SYS_syscall) {
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sa->code = *ap++;
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sa->nap--;
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} else if (sa->code == SYS___syscall) {
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sa->code = ap[_QUAD_LOWWORD];
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sa->nap -= 2;
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ap += 2;
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}
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p = td->td_proc;
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if (p->p_sysent->sv_mask)
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sa->code &= p->p_sysent->sv_mask;
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if (sa->code >= p->p_sysent->sv_size)
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sa->callp = &p->p_sysent->sv_table[0];
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else
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sa->callp = &p->p_sysent->sv_table[sa->code];
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sa->narg = sa->callp->sy_narg;
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error = 0;
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memcpy(sa->args, ap, sa->nap * sizeof(register_t));
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if (sa->narg > sa->nap) {
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error = copyin((void *)td->td_frame->tf_usr_sp, sa->args +
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sa->nap, (sa->narg - sa->nap) * sizeof(register_t));
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}
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if (error == 0) {
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td->td_retval[0] = 0;
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td->td_retval[1] = 0;
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}
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return (error);
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}
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#include "../../kern/subr_syscall.c"
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static void
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syscall(struct thread *td, struct trapframe *frame)
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{
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struct syscall_args sa;
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int error;
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sa.nap = 4;
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error = syscallenter(td, &sa);
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KASSERT(error != 0 || td->td_ar == NULL,
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("returning from syscall with td_ar set!"));
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syscallret(td, error, &sa);
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}
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void
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swi_handler(struct trapframe *frame)
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{
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struct thread *td = curthread;
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td->td_frame = frame;
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td->td_pticks = 0;
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/*
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* Make sure the program counter is correctly aligned so we
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* don't take an alignment fault trying to read the opcode.
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* XXX: Fix for Thumb mode
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*/
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if (__predict_false(((frame->tf_pc - INSN_SIZE) & 3) != 0)) {
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call_trapsignal(td, SIGILL, 0);
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userret(td, frame);
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return;
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}
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/*
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* Enable interrupts if they were enabled before the exception.
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* Since all syscalls *should* come from user mode it will always
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* be safe to enable them, but check anyway.
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*/
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if (td->td_md.md_spinlock_count == 0) {
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if (__predict_true(frame->tf_spsr & PSR_I) == 0)
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enable_interrupts(PSR_I);
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if (__predict_true(frame->tf_spsr & PSR_F) == 0)
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enable_interrupts(PSR_F);
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}
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syscall(td, frame);
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}
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@ -79,28 +79,15 @@
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*/
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#include "opt_ktrace.h"
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/syscall.h>
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#include <sys/sysent.h>
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#include <sys/signalvar.h>
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#include <sys/ktr.h>
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#ifdef KTRACE
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#include <sys/uio.h>
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#include <sys/ktrace.h>
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#endif
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#include <sys/ptrace.h>
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#include <sys/pioctl.h>
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#include <vm/vm.h>
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#include <vm/pmap.h>
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@ -108,28 +95,16 @@ __FBSDID("$FreeBSD$");
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#include <vm/vm_map.h>
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#include <vm/vm_extern.h>
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#include <machine/armreg.h>
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#include <machine/cpuconf.h>
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#include <machine/vmparam.h>
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#include <machine/frame.h>
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#include <machine/cpu.h>
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#include <machine/intr.h>
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#include <machine/frame.h>
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#include <machine/machdep.h>
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#include <machine/pcb.h>
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#include <machine/proc.h>
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#include <machine/swi.h>
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#include <security/audit/audit.h>
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#include <machine/vmparam.h>
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#ifdef KDB
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#include <sys/kdb.h>
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#endif
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void swi_handler(struct trapframe *);
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#include <machine/disassem.h>
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#include <machine/machdep.h>
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extern char fusubailout[];
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#ifdef DEBUG
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@ -775,106 +750,4 @@ badaddr_read(void *addr, size_t size, void *rptr)
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/* Return EFAULT if the address was invalid, else zero */
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return (rv);
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}
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int
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cpu_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
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{
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struct proc *p;
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register_t *ap;
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int error;
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#ifdef __ARM_EABI__
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sa->code = td->td_frame->tf_r7;
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#else
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sa->code = sa->insn & 0x000fffff;
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#endif
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ap = &td->td_frame->tf_r0;
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if (sa->code == SYS_syscall) {
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sa->code = *ap++;
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sa->nap--;
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} else if (sa->code == SYS___syscall) {
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sa->code = ap[_QUAD_LOWWORD];
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sa->nap -= 2;
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ap += 2;
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}
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p = td->td_proc;
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if (p->p_sysent->sv_mask)
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sa->code &= p->p_sysent->sv_mask;
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if (sa->code >= p->p_sysent->sv_size)
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sa->callp = &p->p_sysent->sv_table[0];
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else
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sa->callp = &p->p_sysent->sv_table[sa->code];
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sa->narg = sa->callp->sy_narg;
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error = 0;
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memcpy(sa->args, ap, sa->nap * sizeof(register_t));
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if (sa->narg > sa->nap) {
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error = copyin((void *)td->td_frame->tf_usr_sp, sa->args +
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sa->nap, (sa->narg - sa->nap) * sizeof(register_t));
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}
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if (error == 0) {
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td->td_retval[0] = 0;
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td->td_retval[1] = 0;
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}
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return (error);
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}
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#include "../../kern/subr_syscall.c"
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static void
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syscall(struct thread *td, struct trapframe *frame)
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{
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struct syscall_args sa;
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int error;
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#ifndef __ARM_EABI__
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sa.insn = *(uint32_t *)(frame->tf_pc - INSN_SIZE);
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switch (sa.insn & SWI_OS_MASK) {
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case 0: /* XXX: we need our own one. */
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break;
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default:
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call_trapsignal(td, SIGILL, 0);
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userret(td, frame);
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return;
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}
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#endif
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sa.nap = 4;
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error = syscallenter(td, &sa);
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KASSERT(error != 0 || td->td_ar == NULL,
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("returning from syscall with td_ar set!"));
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syscallret(td, error, &sa);
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}
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void
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swi_handler(struct trapframe *frame)
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{
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struct thread *td = curthread;
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td->td_frame = frame;
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td->td_pticks = 0;
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/*
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* Make sure the program counter is correctly aligned so we
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* don't take an alignment fault trying to read the opcode.
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*/
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if (__predict_false(((frame->tf_pc - INSN_SIZE) & 3) != 0)) {
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call_trapsignal(td, SIGILL, 0);
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userret(td, frame);
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return;
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}
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/*
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* Enable interrupts if they were enabled before the exception.
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* Since all syscalls *should* come from user mode it will always
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* be safe to enable them, but check anyway.
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*/
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if (td->td_md.md_spinlock_count == 0) {
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if (__predict_true(frame->tf_spsr & PSR_I) == 0)
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enable_interrupts(PSR_I);
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if (__predict_true(frame->tf_spsr & PSR_F) == 0)
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enable_interrupts(PSR_F);
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}
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syscall(td, frame);
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}
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}
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@ -49,6 +49,7 @@ arm/arm/stdatomic.c standard \
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arm/arm/support.S standard
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arm/arm/swtch.S standard
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arm/arm/sys_machdep.c standard
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arm/arm/syscall.c standard
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arm/arm/trap.c standard
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arm/arm/uio_machdep.c standard
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arm/arm/undefined.c standard
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