1a76d60f0SBruce Evans /*- 2df8bae1dSRodney W. Grimes * Copyright (c) 1993 Jan-Simon Pendry 3df8bae1dSRodney W. Grimes * Copyright (c) 1993 4df8bae1dSRodney W. Grimes * The Regents of the University of California. All rights reserved. 5df8bae1dSRodney W. Grimes * 6df8bae1dSRodney W. Grimes * This code is derived from software contributed to Berkeley by 7df8bae1dSRodney W. Grimes * Jan-Simon Pendry. 8df8bae1dSRodney W. Grimes * 9df8bae1dSRodney W. Grimes * Redistribution and use in source and binary forms, with or without 10df8bae1dSRodney W. Grimes * modification, are permitted provided that the following conditions 11df8bae1dSRodney W. Grimes * are met: 12df8bae1dSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright 13df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer. 14df8bae1dSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright 15df8bae1dSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the 16df8bae1dSRodney W. Grimes * documentation and/or other materials provided with the distribution. 17df8bae1dSRodney W. Grimes * 3. All advertising materials mentioning features or use of this software 18df8bae1dSRodney W. Grimes * must display the following acknowledgement: 19df8bae1dSRodney W. Grimes * This product includes software developed by the University of 20df8bae1dSRodney W. Grimes * California, Berkeley and its contributors. 21df8bae1dSRodney W. Grimes * 4. Neither the name of the University nor the names of its contributors 22df8bae1dSRodney W. Grimes * may be used to endorse or promote products derived from this software 23df8bae1dSRodney W. Grimes * without specific prior written permission. 24df8bae1dSRodney W. Grimes * 25df8bae1dSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26df8bae1dSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27df8bae1dSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28df8bae1dSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29df8bae1dSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30df8bae1dSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31df8bae1dSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32df8bae1dSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33df8bae1dSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34df8bae1dSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35df8bae1dSRodney W. Grimes * SUCH DAMAGE. 36df8bae1dSRodney W. Grimes * 37996c772fSJohn Dyson * @(#)procfs_fpregs.c 8.2 (Berkeley) 6/15/94 38df8bae1dSRodney W. Grimes * 39996c772fSJohn Dyson * From: 40a76d60f0SBruce Evans * $Id: procfs_regs.c,v 3.2 1993/12/15 09:40:17 jsp Exp $ 41c3aac50fSPeter Wemm * $FreeBSD$ 42df8bae1dSRodney W. Grimes */ 43df8bae1dSRodney W. Grimes 44df8bae1dSRodney W. Grimes #include <sys/param.h> 45fb919e4dSMark Murray #include <sys/systm.h> 46fb919e4dSMark Murray #include <sys/lock.h> 47fb919e4dSMark Murray #include <sys/mutex.h> 48df8bae1dSRodney W. Grimes #include <sys/proc.h> 493da32491SDag-Erling Smørgrav #include <sys/ptrace.h> 503a669c52SDag-Erling Smørgrav #include <sys/uio.h> 51fb919e4dSMark Murray 52df8bae1dSRodney W. Grimes #include <machine/reg.h> 53fb919e4dSMark Murray 543a669c52SDag-Erling Smørgrav #include <fs/pseudofs/pseudofs.h> 5599d300a1SRuslan Ermilov #include <fs/procfs/procfs.h> 56fb919e4dSMark Murray 57df8bae1dSRodney W. Grimes int 583a669c52SDag-Erling Smørgrav procfs_doprocfpregs(PFS_FILL_ARGS) 59df8bae1dSRodney W. Grimes { 60df8bae1dSRodney W. Grimes int error; 61df8bae1dSRodney W. Grimes struct fpreg r; 62df8bae1dSRodney W. Grimes char *kv; 63df8bae1dSRodney W. Grimes int kl; 64df8bae1dSRodney W. Grimes 65ff7299d9SJohn Baldwin PROC_LOCK(p); 66f44d9e24SJohn Baldwin if (p_candebug(td, p)) { 67ff7299d9SJohn Baldwin PROC_UNLOCK(p); 68a76d60f0SBruce Evans return (EPERM); 69ff7299d9SJohn Baldwin } 70df8bae1dSRodney W. Grimes kl = sizeof(r); 71df8bae1dSRodney W. Grimes kv = (char *) &r; 72df8bae1dSRodney W. Grimes 73df8bae1dSRodney W. Grimes kv += uio->uio_offset; 74df8bae1dSRodney W. Grimes kl -= uio->uio_offset; 75df8bae1dSRodney W. Grimes if (kl > uio->uio_resid) 76df8bae1dSRodney W. Grimes kl = uio->uio_resid; 77df8bae1dSRodney W. Grimes 78ff7299d9SJohn Baldwin _PHOLD(p); 79df8bae1dSRodney W. Grimes if (kl < 0) 80df8bae1dSRodney W. Grimes error = EINVAL; 81df8bae1dSRodney W. Grimes else 82a76d60f0SBruce Evans /* XXXKSE: */ 83079b7badSJulian Elischer error = proc_read_fpregs(FIRST_THREAD_IN_PROC(p), &r); 84df8bae1dSRodney W. Grimes if (error == 0) 85df8bae1dSRodney W. Grimes error = uiomove(kv, kl, uio); 86df8bae1dSRodney W. Grimes if (error == 0 && uio->uio_rw == UIO_WRITE) { 87df8bae1dSRodney W. Grimes if (p->p_stat != SSTOP) 88df8bae1dSRodney W. Grimes error = EBUSY; 89df8bae1dSRodney W. Grimes else 90a76d60f0SBruce Evans /* XXXKSE: */ 91079b7badSJulian Elischer error = proc_write_fpregs(FIRST_THREAD_IN_PROC(p), &r); 92df8bae1dSRodney W. Grimes } 93ff7299d9SJohn Baldwin _PRELE(p); 94ff7299d9SJohn Baldwin PROC_UNLOCK(p); 95df8bae1dSRodney W. Grimes 96df8bae1dSRodney W. Grimes uio->uio_offset = 0; 97df8bae1dSRodney W. Grimes return (error); 98df8bae1dSRodney W. Grimes } 99