projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 984263bc MD |
1 | /*- |
| 2 | * Copyright (c) 1999 Brian Scott Dean, brdean@unx.sas.com. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Jan-Simon Pendry under the following copyrights and conditions: | |
| 7 | * | |
| 8 | * Copyright (c) 1993 Jan-Simon Pendry | |
| 9 | * Copyright (c) 1993 | |
| 10 | * The Regents of the University of California. All rights reserved. | |
| 11 | * | |
| 12 | * This code is derived from software contributed to Berkeley by | |
| 13 | * Jan-Simon Pendry. | |
| 14 | * | |
| 15 | * Redistribution and use in source and binary forms, with or without | |
| 16 | * modification, are permitted provided that the following conditions | |
| 17 | * are met: | |
| 18 | * 1. Redistributions of source code must retain the above copyright | |
| 19 | * notice, this list of conditions and the following disclaimer. | |
| 20 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 21 | * notice, this list of conditions and the following disclaimer in the | |
| 22 | * documentation and/or other materials provided with the distribution. | |
| dc71b7ab | 23 | * 3. Neither the name of the University nor the names of its contributors |
| 984263bc MD |
24 | * may be used to endorse or promote products derived from this software |
| 25 | * without specific prior written permission. | |
| 26 | * | |
| 27 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 28 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 29 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 30 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 31 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 32 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 33 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 34 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 35 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 36 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 37 | * SUCH DAMAGE. | |
| 38 | * | |
| 39 | * $FreeBSD: src/sys/miscfs/procfs/procfs_dbregs.c,v 1.4.2.3 2002/01/22 17:22:59 nectar Exp $ | |
| 40 | */ | |
| 41 | ||
| 42 | #include <sys/param.h> | |
| 13dd34d8 | 43 | #include <sys/uio.h> |
| 984263bc | 44 | #include <sys/proc.h> |
| 2b3f93ea | 45 | #include <sys/caps.h> |
| 984263bc | 46 | #include <sys/vnode.h> |
| 527fddf7 | 47 | #include <sys/reg.h> |
| 1f2de5d4 | 48 | #include <vfs/procfs/procfs.h> |
| 984263bc MD |
49 | #include <vm/vm.h> |
| 50 | ||
| 51 | int | |
| c7e98b2f | 52 | procfs_dodbregs(struct proc *curp, struct lwp *lp, struct pfsnode *pfs, |
| ac424f9b | 53 | struct uio *uio) |
| 984263bc | 54 | { |
| c7e98b2f | 55 | struct proc *p = lp->lwp_proc; |
| 984263bc MD |
56 | int error; |
| 57 | struct dbreg r; | |
| 984263bc | 58 | |
| 13dd34d8 | 59 | /* Can't trace a process that's currently exec'ing. */ |
| 4643740a | 60 | if ((p->p_flags & P_INEXEC) != 0) |
| 984263bc | 61 | return EAGAIN; |
| 41c20dac | 62 | if (!CHECKIO(curp, p) || p_trespass(curp->p_ucred, p->p_ucred)) |
| 984263bc | 63 | return (EPERM); |
| c7e98b2f SS |
64 | LWPHOLD(lp); |
| 65 | error = procfs_read_dbregs(lp, &r); | |
| 984263bc | 66 | if (error == 0) |
| 25e80b06 | 67 | error = uiomove_frombuf(&r, sizeof(r), uio); |
| 984263bc | 68 | if (error == 0 && uio->uio_rw == UIO_WRITE) { |
| c7e98b2f | 69 | if (lp->lwp_stat != LSSTOP) |
| 984263bc MD |
70 | error = EBUSY; |
| 71 | else | |
| c7e98b2f | 72 | error = procfs_write_dbregs(lp, &r); |
| 984263bc | 73 | } |
| c7e98b2f | 74 | LWPRELE(lp); |
| 984263bc | 75 | uio->uio_offset = 0; |
| 47538602 | 76 | |
| 984263bc MD |
77 | return (error); |
| 78 | } | |
| 79 | ||
| 80 | int | |
| c7e98b2f | 81 | procfs_validdbregs(struct lwp *lp) |
| 984263bc | 82 | { |
| 4643740a | 83 | return ((lp->lwp_proc->p_flags & P_SYSTEM) == 0); |
| 984263bc | 84 | } |