e52b5e4bfb
- bug with order in args in mask conversion md code. - flags can be both int and long on the alpha. kludge around that, by not passing pointers to the conversion function. - something is wrong with the toolchain look at the void * cast in copyout(). - sa_restorer is in a different place on the aplha. Deal with that, by not initializing it as before. XXX: this should be changed in the MD signal definition.
534 lines
15 KiB
C
534 lines
15 KiB
C
/* $NetBSD: linux_machdep.c,v 1.21 2002/02/18 22:24:17 christos Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Eric Haszlakiewicz.
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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 the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND 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 THE FOUNDATION OR CONTRIBUTORS
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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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* Based on sys/arch/i386/i386/linux_machdep.c:
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* linux_machdep.c,v 1.42 1998/09/11 12:50:06 mycroft Exp
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* written by Frank van der Linden
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*
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: linux_machdep.c,v 1.21 2002/02/18 22:24:17 christos Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/signalvar.h>
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#include <sys/kernel.h>
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#include <sys/map.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/buf.h>
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#include <sys/reboot.h>
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#include <sys/conf.h>
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#include <sys/exec.h>
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#include <sys/file.h>
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#include <sys/callout.h>
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#include <sys/malloc.h>
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#include <sys/mbuf.h>
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#include <sys/msgbuf.h>
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#include <sys/mount.h>
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#include <sys/vnode.h>
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#include <sys/device.h>
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#include <sys/syscallargs.h>
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#include <sys/filedesc.h>
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#include <sys/exec_elf.h>
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#include <sys/ioctl.h>
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#include <uvm/uvm_extern.h>
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#include <compat/linux/common/linux_types.h>
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#include <compat/linux/common/linux_signal.h>
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#include <compat/linux/common/linux_siginfo.h>
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#include <compat/linux/common/linux_util.h>
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#include <compat/linux/common/linux_ioctl.h>
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#include <compat/linux/common/linux_exec.h>
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#include <compat/linux/common/linux_machdep.h>
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#include <compat/linux/common/linux_emuldata.h>
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#include <compat/linux/linux_syscallargs.h>
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#include <machine/alpha.h>
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#include <machine/reg.h>
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#if defined(_KERNEL_OPT)
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#include "wsdisplay.h"
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#endif
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#if (NWSDISPLAY >0)
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#include <dev/wscons/wsdisplay_usl_io.h>
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#endif
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#ifdef DEBUG
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#include <machine/sigdebug.h>
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#endif
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/*
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* Deal with some alpha-specific things in the Linux emulation code.
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*/
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void
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linux_setregs(p, epp, stack)
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struct proc *p;
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struct exec_package *epp;
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u_long stack;
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{
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#ifdef DEBUG
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struct trapframe *tfp = p->p_md.md_tf;
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#endif
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setregs(p, epp, stack);
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#ifdef DEBUG
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/*
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* Linux has registers set to zero on entry; for DEBUG kernels
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* the alpha setregs() fills registers with 0xbabefacedeadbeef.
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*/
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memset(tfp->tf_regs, 0, FRAME_SIZE * sizeof tfp->tf_regs[0]);
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#endif
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}
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void setup_linux_rt_sigframe(tf, sig, mask)
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struct trapframe *tf;
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int sig;
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sigset_t *mask;
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{
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struct proc *p = curproc;
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struct linux_rt_sigframe *sfp, sigframe;
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int onstack;
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int fsize, rndfsize;
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extern char linux_rt_sigcode[], linux_rt_esigcode[];
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/* Do we need to jump onto the signal stack? */
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onstack = (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
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(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
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/* Allocate space for the signal handler context. */
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fsize = sizeof(struct linux_rt_sigframe);
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rndfsize = ((fsize + 15) / 16) * 16;
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if (onstack)
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sfp = (struct linux_rt_sigframe *)
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((caddr_t)p->p_sigctx.ps_sigstk.ss_sp +
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p->p_sigctx.ps_sigstk.ss_size);
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else
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sfp = (struct linux_rt_sigframe *)(alpha_pal_rdusp());
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sfp = (struct linux_rt_sigframe *)((caddr_t)sfp - rndfsize);
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && (p->p_pid == sigpid))
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printf("linux_sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid,
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sig, &onstack, sfp);
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#endif /* DEBUG */
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/*
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* Build the signal context to be used by sigreturn.
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*/
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bzero(&sigframe.uc, sizeof(struct linux_ucontext));
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sigframe.uc.uc_mcontext.sc_onstack = onstack;
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/* Setup potentially partial signal mask in sc_mask. */
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/* But get all of it in uc_sigmask */
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native_to_linux_old_sigset(&sigframe.uc.uc_mcontext.sc_mask, mask);
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native_to_linux_sigset(&sigframe.uc.uc_sigmask, mask);
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sigframe.uc.uc_mcontext.sc_pc = tf->tf_regs[FRAME_PC];
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sigframe.uc.uc_mcontext.sc_ps = ALPHA_PSL_USERMODE;
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frametoreg(tf, (struct reg *)sigframe.uc.uc_mcontext.sc_regs);
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sigframe.uc.uc_mcontext.sc_regs[R_SP] = alpha_pal_rdusp();
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alpha_enable_fp(p, 1);
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sigframe.uc.uc_mcontext.sc_fpcr = alpha_read_fpcr();
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sigframe.uc.uc_mcontext.sc_fp_control = alpha_read_fp_c(p);
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alpha_pal_wrfen(0);
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sigframe.uc.uc_mcontext.sc_traparg_a0 = tf->tf_regs[FRAME_A0];
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sigframe.uc.uc_mcontext.sc_traparg_a1 = tf->tf_regs[FRAME_A1];
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sigframe.uc.uc_mcontext.sc_traparg_a2 = tf->tf_regs[FRAME_A2];
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/*
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* XXX XAX Create bogus siginfo data. This can't really
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* XXX be fixed until NetBSD has realtime signals.
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* XXX Or we do the emuldata thing.
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* XXX -erh
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*/
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bzero(&sigframe.info, sizeof(struct linux_siginfo));
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sigframe.info.lsi_signo = sig;
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sigframe.info.lsi_code = LINUX_SI_USER;
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sigframe.info.lsi_pid = p->p_pid;
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sigframe.info.lsi_uid = p->p_ucred->cr_uid; /* Use real uid here? */
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if (copyout((caddr_t)&sigframe, (caddr_t)sfp, fsize) != 0) {
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sendsig(%d): copyout failed on sig %d\n",
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p->p_pid, sig);
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#endif
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/*
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* Process has trashed its stack; give it an illegal
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* instruction to halt it in its tracks.
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*/
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sigexit(p, SIGILL);
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/* NOTREACHED */
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}
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/* Pass pointers to siginfo and ucontext in the regs */
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tf->tf_regs[FRAME_A1] = (unsigned long)&sfp->info;
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tf->tf_regs[FRAME_A2] = (unsigned long)&sfp->uc;
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/* Address of trampoline code. End up at this PC after mi_switch */
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tf->tf_regs[FRAME_PC] =
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(u_int64_t)(PS_STRINGS - (linux_rt_esigcode - linux_rt_sigcode));
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/* Adjust the stack */
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alpha_pal_wrusp((unsigned long)sfp);
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/* Remember that we're now on the signal stack. */
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if (onstack)
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p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
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}
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void setup_linux_sigframe(tf, sig, mask)
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struct trapframe *tf;
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int sig;
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sigset_t *mask;
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{
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struct proc *p = curproc;
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struct linux_sigframe *sfp, sigframe;
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int onstack;
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int fsize, rndfsize;
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extern char linux_sigcode[], linux_esigcode[];
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/* Do we need to jump onto the signal stack? */
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onstack = (p->p_sigctx.ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
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(SIGACTION(p, sig).sa_flags & SA_ONSTACK) != 0;
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/* Allocate space for the signal handler context. */
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fsize = sizeof(struct linux_sigframe);
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rndfsize = ((fsize + 15) / 16) * 16;
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if (onstack)
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sfp = (struct linux_sigframe *)
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((caddr_t)p->p_sigctx.ps_sigstk.ss_sp +
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p->p_sigctx.ps_sigstk.ss_size);
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else
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sfp = (struct linux_sigframe *)(alpha_pal_rdusp());
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sfp = (struct linux_sigframe *)((caddr_t)sfp - rndfsize);
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && (p->p_pid == sigpid))
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printf("linux_sendsig(%d): sig %d ssp %p usp %p\n", p->p_pid,
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sig, &onstack, sfp);
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#endif /* DEBUG */
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/*
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* Build the signal context to be used by sigreturn.
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*/
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bzero(&sigframe.sf_sc, sizeof(struct linux_ucontext));
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sigframe.sf_sc.sc_onstack = onstack;
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native_to_linux_old_sigset(&sigframe.sf_sc.sc_mask, mask);
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sigframe.sf_sc.sc_pc = tf->tf_regs[FRAME_PC];
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sigframe.sf_sc.sc_ps = ALPHA_PSL_USERMODE;
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frametoreg(tf, (struct reg *)sigframe.sf_sc.sc_regs);
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sigframe.sf_sc.sc_regs[R_SP] = alpha_pal_rdusp();
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if (p == fpcurproc) {
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alpha_pal_wrfen(1);
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savefpstate(&p->p_addr->u_pcb.pcb_fp);
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alpha_pal_wrfen(0);
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sigframe.sf_sc.sc_fpcr = p->p_addr->u_pcb.pcb_fp.fpr_cr;
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fpcurproc = NULL;
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}
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/* XXX ownedfp ? etc...? */
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sigframe.sf_sc.sc_traparg_a0 = tf->tf_regs[FRAME_A0];
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sigframe.sf_sc.sc_traparg_a1 = tf->tf_regs[FRAME_A1];
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sigframe.sf_sc.sc_traparg_a2 = tf->tf_regs[FRAME_A2];
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if (copyout((caddr_t)&sigframe, (caddr_t)sfp, fsize) != 0) {
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#ifdef DEBUG
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sendsig(%d): copyout failed on sig %d\n",
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p->p_pid, sig);
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#endif
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/*
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* Process has trashed its stack; give it an illegal
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* instruction to halt it in its tracks.
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*/
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sigexit(p, SIGILL);
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/* NOTREACHED */
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}
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/* Pass pointers to sigcontext in the regs */
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tf->tf_regs[FRAME_A1] = 0;
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tf->tf_regs[FRAME_A2] = (unsigned long)&sfp->sf_sc;
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/* Address of trampoline code. End up at this PC after mi_switch */
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tf->tf_regs[FRAME_PC] =
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(u_int64_t)(PS_STRINGS - (linux_esigcode - linux_sigcode));
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/* Adjust the stack */
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alpha_pal_wrusp((unsigned long)sfp);
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/* Remember that we're now on the signal stack. */
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if (onstack)
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p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
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}
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/*
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* Send an interrupt to process.
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*
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* Stack is set up to allow sigcode stored
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* in u. to call routine, followed by kcall
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* to sigreturn routine below. After sigreturn
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* resets the signal mask, the stack, and the
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* frame pointer, it returns to the user
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* specified pc, psl.
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*/
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void
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linux_sendsig(catcher, sig, mask, code)
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sig_t catcher;
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int sig;
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sigset_t *mask;
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u_long code;
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{
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struct proc *p = curproc;
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struct trapframe *tf = p->p_md.md_tf;
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#ifdef notyet
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struct linux_emuldata *edp;
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/* Setup the signal frame (and part of the trapframe) */
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/*OLD: if (p->p_sigacts->ps_siginfo & sigmask(sig))*/
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/* XXX XAX this is broken now. need someplace to store what
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XXX XAX kind of signal handler a signal has.*/
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#if 0
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edp = (struct linux_emuldata *)p->p_emuldata;
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#else
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edp = 0;
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#endif
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if (edp && sigismember(&edp->ps_siginfo, sig))
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setup_linux_rt_sigframe(tf, sig, mask);
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else
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#endif /* notyet */
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setup_linux_sigframe(tf, sig, mask);
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/* Signal handler for trampoline code */
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tf->tf_regs[FRAME_T12] = (u_int64_t)catcher;
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tf->tf_regs[FRAME_A0] = native_to_linux_sig[sig];
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/*
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* Linux has a custom restorer option. To support it we would
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* need to store an array of restorers and a sigcode block
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* which knew to use it. Doesn't seem worth the trouble.
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* -erh
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*/
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#ifdef DEBUG
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if (sigdebug & SDB_FOLLOW)
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printf("sendsig(%d): pc %lx, catcher %lx\n", p->p_pid,
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tf->tf_regs[FRAME_PC], tf->tf_regs[FRAME_A3]);
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if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
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printf("sendsig(%d): sig %d returns\n", p->p_pid, sig);
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#endif
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}
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/*
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* System call to cleanup state after a signal
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* has been taken. Reset signal mask and
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* stack state from context left by sendsig (above).
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* Return to previous pc as specified by context
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* left by sendsig.
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* Linux real-time signals use a different sigframe,
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* but the sigcontext is the same.
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*/
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int
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linux_restore_sigcontext(struct proc *p, struct linux_sigcontext context,
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sigset_t *mask)
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{
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/*
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* Linux doesn't (yet) have alternate signal stacks.
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* However, the OSF/1 sigcontext which they use has
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* an onstack member. This could be needed in the future.
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*/
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if (context.sc_onstack & LINUX_SA_ONSTACK)
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p->p_sigctx.ps_sigstk.ss_flags |= SS_ONSTACK;
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else
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p->p_sigctx.ps_sigstk.ss_flags &= ~SS_ONSTACK;
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/* Reset the signal mask */
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(void) sigprocmask1(p, SIG_SETMASK, mask, 0);
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/*
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* Check for security violations.
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* Linux doesn't allow any changes to the PSL.
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*/
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if (context.sc_ps != ALPHA_PSL_USERMODE)
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return(EINVAL);
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p->p_md.md_tf->tf_regs[FRAME_PC] = context.sc_pc;
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p->p_md.md_tf->tf_regs[FRAME_PS] = context.sc_ps;
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regtoframe((struct reg *)context.sc_regs, p->p_md.md_tf);
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alpha_pal_wrusp(context.sc_regs[R_SP]);
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if (p == fpcurproc)
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fpcurproc = NULL;
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/* Restore fp regs and fpr_cr */
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bcopy((struct fpreg *)context.sc_fpregs, &p->p_addr->u_pcb.pcb_fp,
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sizeof(struct fpreg));
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/* XXX sc_ownedfp ? */
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/* XXX sc_fp_control ? */
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#ifdef DEBUG
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if (sigdebug & SDB_FOLLOW)
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printf("linux_rt_sigreturn(%d): returns\n", p->p_pid);
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#endif
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return (EJUSTRETURN);
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}
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int
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linux_sys_rt_sigreturn(p, v, retval)
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struct proc *p;
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void *v;
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register_t *retval;
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{
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struct linux_sys_rt_sigreturn_args /* {
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syscallarg(struct linux_rt_sigframe *) sfp;
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} */ *uap = v;
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struct linux_rt_sigframe *sfp, sigframe;
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sigset_t mask;
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/*
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* The trampoline code hands us the context.
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* It is unsafe to keep track of it ourselves, in the event that a
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* program jumps out of a signal handler.
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*/
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sfp = SCARG(uap, sfp);
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if (ALIGN(sfp) != (u_int64_t)sfp)
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return(EINVAL);
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/*
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* Fetch the frame structure.
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*/
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if (copyin((caddr_t)sfp, &sigframe,
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sizeof(struct linux_rt_sigframe)) != 0)
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return (EFAULT);
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/* Grab the signal mask */
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linux_to_native_sigset(&mask, &sigframe.uc.uc_sigmask);
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return(linux_restore_sigcontext(p, sigframe.uc.uc_mcontext, &mask));
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}
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int
|
|
linux_sys_sigreturn(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_sigreturn_args /* {
|
|
syscallarg(struct linux_sigframe *) sfp;
|
|
} */ *uap = v;
|
|
struct linux_sigframe *sfp, frame;
|
|
sigset_t mask;
|
|
|
|
/*
|
|
* The trampoline code hands us the context.
|
|
* It is unsafe to keep track of it ourselves, in the event that a
|
|
* program jumps out of a signal handler.
|
|
*/
|
|
|
|
sfp = SCARG(uap, sfp);
|
|
if (ALIGN(sfp) != (u_int64_t)sfp)
|
|
return(EINVAL);
|
|
|
|
/*
|
|
* Fetch the frame structure.
|
|
*/
|
|
if (copyin((caddr_t)sfp, &frame, sizeof(struct linux_sigframe)) != 0)
|
|
return(EFAULT);
|
|
|
|
/* Grab the signal mask. */
|
|
/* XXX use frame.extramask */
|
|
linux_old_to_native_sigset(&mask, frame.sf_sc.sc_mask);
|
|
|
|
return(linux_restore_sigcontext(p, frame.sf_sc, &mask));
|
|
}
|
|
|
|
/*
|
|
* We come here in a last attempt to satisfy a Linux ioctl() call
|
|
*/
|
|
/* XXX XAX update this, add maps, etc... */
|
|
int
|
|
linux_machdepioctl(p, v, retval)
|
|
struct proc *p;
|
|
void *v;
|
|
register_t *retval;
|
|
{
|
|
struct linux_sys_ioctl_args /* {
|
|
syscallarg(int) fd;
|
|
syscallarg(u_long) com;
|
|
syscallarg(caddr_t) data;
|
|
} */ *uap = v;
|
|
struct sys_ioctl_args bia;
|
|
u_long com;
|
|
|
|
SCARG(&bia, fd) = SCARG(uap, fd);
|
|
SCARG(&bia, data) = SCARG(uap, data);
|
|
com = SCARG(uap, com);
|
|
|
|
switch (com) {
|
|
default:
|
|
printf("linux_machdepioctl: invalid ioctl %08lx\n", com);
|
|
return EINVAL;
|
|
}
|
|
SCARG(&bia, com) = com;
|
|
return sys_ioctl(p, &bia, retval);
|
|
}
|
|
|
|
/* XXX XAX fix this */
|
|
dev_t
|
|
linux_fakedev(dev, raw)
|
|
dev_t dev;
|
|
int raw;
|
|
{
|
|
return dev;
|
|
}
|
|
|