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Diffstat (limited to 'sys/alpha/alpha/procfs_machdep.c')
-rw-r--r-- | sys/alpha/alpha/procfs_machdep.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/sys/alpha/alpha/procfs_machdep.c b/sys/alpha/alpha/procfs_machdep.c new file mode 100644 index 000000000000..11898d0cf3cb --- /dev/null +++ b/sys/alpha/alpha/procfs_machdep.c @@ -0,0 +1,146 @@ +/* + * 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); +} |