193 lines
5.9 KiB
C
193 lines
5.9 KiB
C
/* $NetBSD: md-sparc.c,v 1.2 1995/09/05 02:51:08 tls Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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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 University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)md-sparc.c 8.1 (Berkeley) 6/6/93";
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#else
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static char rcsid[] = "$NetBSD: md-sparc.c,v 1.2 1995/09/05 02:51:08 tls Exp $";
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/proc.h>
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#include <sys/user.h>
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#include <sys/sysctl.h>
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#include <machine/vmparam.h>
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#include <kvm.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include "extern.h"
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#ifndef offsetof
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#define offsetof(s, f) ((int)&((s *)0)->f)
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#endif
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static void
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shift_page(fd, off, ssize)
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register int fd;
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register off_t off;
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register int ssize;
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{
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char buffer[NBPG];
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(void)lseek(fd, (off_t)-NBPG, SEEK_END);
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for (; ssize > 0; ssize -= NBPG) {
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(void)read(fd, buffer, NBPG);
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(void)write(fd, buffer, NBPG);
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(void)lseek(fd, (off_t)-2 * NBPG, SEEK_CUR);
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}
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}
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/*
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* Fix up the core image for the sparc. We need to flush any register
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* windows that are cached in the pcb out to the user stack.
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* Also, we need to get the trap frame and possible floating point state
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* from the top of the kernel stack and store it in the pcb.
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*/
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void
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md_core(kd, fd, ki)
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kvm_t *kd;
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int fd;
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struct kinfo_proc *ki;
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{
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register struct rwindow *rw;
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register int nsaved, cc, ssize;
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register off_t off, s;
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register u_long sp;
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struct pcb pcb;
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struct trapframe tf;
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/*
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* Before anything else read the trapframe. Synchronizing here
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* is impossible if the process is running.
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*/
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cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_tf,
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/* XXX */
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(void *)&tf, sizeof(tf));
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if (cc < 0)
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err(1, "kvm_read: %s (reading kernel trapframe)",
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kvm_geterr(kd));
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if (cc != sizeof(tf))
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err(1, "cannot read kernel trapframe");
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/*
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* Write out the real trap frame.
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*/
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off = offsetof(struct user, u_md);
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off += offsetof(struct md_coredump, md_tf);
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if (lseek(fd, off, SEEK_SET) == -1)
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err(1, "lseek: %s", strerror(errno));
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(void)write(fd, &tf, sizeof(tf));
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if (ki->kp_proc.p_md.md_fpstate != 0) {
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/*
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* If floating point state is present, write it out too.
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* It comes right after the trapframe so we don't need to seek.
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*/
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struct fpstate fs;
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cc = kvm_read(kd, (u_long)ki->kp_proc.p_md.md_fpstate,
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(void *)&fs, sizeof(fs));
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if (cc < 0)
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err(1, "kvm_read: %s (fpu state)", kvm_geterr(kd));
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if (cc != sizeof(fs))
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err(1, "cannot read fpu state");
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(void)write(fd, (char *)&fs, sizeof(fs));
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}
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/*
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* Read pcb.
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*/
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if (lseek(fd, (off_t)offsetof(struct user, u_pcb), SEEK_SET) == -1)
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err(1, "lseek: %s", strerror(errno));
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cc = read(fd, (char *)&pcb, sizeof(pcb));
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if (cc != sizeof(pcb)) {
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if (cc < 0)
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err(1, "read: %s", strerror(errno));
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err(1, "couldn't read pcb from core file");
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}
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/*
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* Write any unsaved windows to the appropriate stack locations.
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*/
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nsaved = pcb.pcb_nsaved;
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if (nsaved == 0)
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return;
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rw = &pcb.pcb_rw[0];
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off = ctob(UPAGES + ki->kp_eproc.e_vm.vm_dsize);
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ssize = ctob(ki->kp_eproc.e_vm.vm_ssize);
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sp = tf.tf_out[6];
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for (; --nsaved >= 0; ++rw) {
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/*
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* Copy register window into appropriate stack location.
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*/
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s = ssize - (USRSTACK - sp);
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if (s < 0) {
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if (s < -NBPG)
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err(1, "cannot copy pcb windows to stack");
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/*
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* It's possible to be missing the bottomost
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* page because a stack page hasn't been allocated
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* for the register save area. Shift over
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* the stack segment by a page, and update
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* the u-area to reflect the new stack size. YECH!
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*/
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shift_page(fd, off, ssize);
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ssize += NBPG;
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s += NBPG;
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++ki->kp_eproc.e_vm.vm_ssize;
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(void)lseek(fd,
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(off_t)offsetof(struct user, u_kproc.kp_eproc.e_vm),
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SEEK_SET);
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(void)write(fd,
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&ki->kp_eproc.e_vm, sizeof(ki->kp_eproc.e_vm));
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}
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if (lseek(fd, off + s, SEEK_SET) == -1)
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err(1, "cannot copy pcb windows to stack");
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(void)write(fd, rw, sizeof(*rw));
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sp = rw->rw_in[6];
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}
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}
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