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+/*
+ * Copyright (c) 1993
+ * The Regents of the University of California. All rights reserved.
+ * Copyright (c) 1993 Jan-Simon Pendry
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Jan-Simon Pendry.
+ *
+ * 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. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. 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.
+ *
+ * @(#)procfs_machdep.c 8.3 (Berkeley) 1/27/94
+ *
+ * From:
+ * $Id: procfs_machdep.c,v 1.10 1997/07/20 08:37:22 bde Exp $
+ */
+
+/*
+ * Functions to be implemented here are:
+ *
+ * procfs_read_regs(proc, regs)
+ * Get the current user-visible register set from the process
+ * and copy it into the regs structure (<machine/reg.h>).
+ * The process is stopped at the time read_regs is called.
+ *
+ * procfs_write_regs(proc, regs)
+ * Update the current register set from the passed in regs
+ * structure. Take care to avoid clobbering special CPU
+ * registers or privileged bits in the PSL.
+ * Depending on the architecture this may have fix-up work to do,
+ * especially if the IAR or PCW are modified.
+ * The process is stopped at the time write_regs is called.
+ *
+ * procfs_read_fpregs, procfs_write_fpregs
+ * deal with the floating point register set, otherwise as above.
+ *
+ * procfs_sstep(proc)
+ * Arrange for the process to trap after executing a single instruction.
+ *
+ */
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/ptrace.h>
+#include <sys/vnode.h>
+#include <machine/reg.h>
+#include <machine/md_var.h>
+#include <miscfs/procfs/procfs.h>
+
+#include <vm/vm.h>
+#include <sys/lock.h>
+#include <vm/pmap.h>
+#include <vm/vm_map.h>
+
+#include <sys/user.h>
+
+int
+procfs_read_regs(p, regs)
+ struct proc *p;
+ struct reg *regs;
+{
+ if ((p->p_flag & P_INMEM) == 0)
+ return (EIO);
+ return (fill_regs(p, regs));
+}
+
+int
+procfs_write_regs(p, regs)
+ struct proc *p;
+ struct reg *regs;
+{
+ if ((p->p_flag & P_INMEM) == 0)
+ return (EIO);
+ return (set_regs(p, regs));
+}
+
+/*
+ * Ptrace doesn't support fpregs at all, and there are no security holes
+ * or translations for fpregs, so we can just copy them.
+ */
+
+int
+procfs_read_fpregs(p, fpregs)
+ struct proc *p;
+ struct fpreg *fpregs;
+{
+ if ((p->p_flag & P_INMEM) == 0)
+ return (EIO);
+
+ if (p == fpcurproc) {
+ alpha_pal_wrfen(1);
+ savefpstate(&p->p_addr->u_pcb.pcb_fp);
+ alpha_pal_wrfen(0);
+ }
+
+ bcopy(&p->p_addr->u_pcb.pcb_fp, fpregs, sizeof *fpregs);
+ return (0);
+}
+
+int
+procfs_write_fpregs(p, fpregs)
+ struct proc *p;
+ struct fpreg *fpregs;
+{
+ if ((p->p_flag & P_INMEM) == 0)
+ return (EIO);
+
+ if (p == fpcurproc)
+ fpcurproc = NULL;
+
+ bcopy(fpregs, &p->p_addr->u_pcb.pcb_fp, sizeof *fpregs);
+ return (0);
+}
+
+int
+procfs_sstep(p)
+ struct proc *p;
+{
+ return (EINVAL);
+}