1 /* $NetBSD: freebsd_misc.c,v 1.32 2007/12/20 23:02:47 dsl Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Frank van der Linden 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Frank van der Linden 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * FreeBSD compatibility module. Try to deal with various FreeBSD system calls. 36 */ 37 38 #include <sys/cdefs.h> 39 __KERNEL_RCSID(0, "$NetBSD: freebsd_misc.c,v 1.32 2007/12/20 23:02:47 dsl Exp $"); 40 41 #if defined(_KERNEL_OPT) 42 #include "opt_ntp.h" 43 #endif 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/proc.h> 48 #include <sys/mount.h> 49 #include <sys/signal.h> 50 #include <sys/signalvar.h> 51 #include <sys/malloc.h> 52 #include <sys/mman.h> 53 #include <sys/ktrace.h> 54 55 #include <sys/syscallargs.h> 56 57 #include <compat/freebsd/freebsd_syscallargs.h> 58 #include <compat/common/compat_util.h> 59 #include <compat/freebsd/freebsd_rtprio.h> 60 #include <compat/freebsd/freebsd_timex.h> 61 #include <compat/freebsd/freebsd_signal.h> 62 #include <compat/freebsd/freebsd_mman.h> 63 64 int 65 freebsd_sys_msync(struct lwp *l, const struct freebsd_sys_msync_args *uap, register_t *retval) 66 { 67 /* { 68 syscallarg(void *) addr; 69 syscallarg(size_t) len; 70 syscallarg(int) flags; 71 } */ 72 struct sys___msync13_args bma; 73 74 /* 75 * FreeBSD-2.0-RELEASE's msync(2) is compatible with NetBSD's. 76 * FreeBSD-2.0.5-RELEASE's msync(2) has addtional argument `flags', 77 * but syscall number is not changed. :-< 78 */ 79 SCARG(&bma, addr) = SCARG(uap, addr); 80 SCARG(&bma, len) = SCARG(uap, len); 81 SCARG(&bma, flags) = SCARG(uap, flags); 82 return sys___msync13(l, &bma, retval); 83 } 84 85 int 86 freebsd_sys_mmap(struct lwp *l, const struct freebsd_sys_mmap_args *uap, register_t *retval) 87 { 88 /* { 89 syscallarg(void *) addr; 90 syscallarg(size_t) len; 91 syscallarg(int) prot; 92 syscallarg(int) flags; 93 syscallarg(int) fd; 94 syscallarg(long) pad; 95 syscallarg(off_t) pos; 96 } */ 97 struct sys_mmap_args bma; 98 int flags, prot, fd; 99 off_t pos; 100 101 prot = SCARG(uap, prot); 102 flags = SCARG(uap, flags); 103 fd = SCARG(uap, fd); 104 pos = SCARG(uap, pos); 105 106 /* 107 * If using MAP_STACK on FreeBSD: 108 * 109 * + fd has to be -1 110 * + prot must have read and write 111 * + MAP_STACK implies MAP_ANON 112 * + MAP_STACK implies offset of 0 113 */ 114 if (flags & FREEBSD_MAP_STACK) { 115 if ((fd != -1) 116 ||((prot & (PROT_READ|PROT_WRITE))!=(PROT_READ|PROT_WRITE))) 117 return (EINVAL); 118 119 flags |= (MAP_ANON | MAP_FIXED); 120 flags &= ~FREEBSD_MAP_STACK; 121 122 pos = 0; 123 } 124 125 SCARG(&bma, addr) = SCARG(uap, addr); 126 SCARG(&bma, len) = SCARG(uap, len); 127 SCARG(&bma, prot) = prot; 128 SCARG(&bma, flags) = flags; 129 SCARG(&bma, fd) = fd; 130 SCARG(&bma, pos) = pos; 131 132 return sys_mmap(l, &bma, retval); 133 } 134 135 /* just a place holder */ 136 137 int 138 freebsd_sys_rtprio(struct lwp *l, const struct freebsd_sys_rtprio_args *uap, register_t *retval) 139 { 140 /* { 141 syscallarg(int) function; 142 syscallarg(pid_t) pid; 143 syscallarg(struct freebsd_rtprio *) rtp; 144 } */ 145 146 return ENOSYS; /* XXX */ 147 } 148 149 #ifdef NTP 150 int 151 freebsd_ntp_adjtime(struct lwp *l, const struct freebsd_ntp_adjtime_args *uap, register_t *retval) 152 { 153 /* { 154 syscallarg(struct freebsd_timex *) tp; 155 } */ 156 157 return ENOSYS; /* XXX */ 158 } 159 #endif 160 161 int 162 freebsd_sys_sigaction4(struct lwp *l, const struct freebsd_sys_sigaction4_args *uap, register_t *retval) 163 { 164 /* { 165 syscallarg(int) signum; 166 syscallarg(const struct freebsd_sigaction4 *) nsa; 167 syscallarg(struct freebsd_sigaction4 *) osa; 168 } */ 169 struct freebsd_sigaction4 nesa, oesa; 170 struct sigaction nbsa, obsa; 171 int error; 172 173 if (SCARG(uap, nsa)) { 174 error = copyin(SCARG(uap, nsa), &nesa, sizeof(nesa)); 175 if (error) 176 return (error); 177 nbsa.sa_handler = nesa.freebsd_sa_handler; 178 nbsa.sa_mask = nesa.freebsd_sa_mask; 179 nbsa.sa_flags = nesa.freebsd_sa_flags; 180 } 181 error = sigaction1(l, SCARG(uap, signum), 182 SCARG(uap, nsa) ? &nbsa : 0, SCARG(uap, osa) ? &obsa : 0, 183 NULL, 0); 184 if (error) 185 return (error); 186 if (SCARG(uap, osa)) { 187 oesa.freebsd_sa_handler = obsa.sa_handler; 188 oesa.freebsd_sa_mask = obsa.sa_mask; 189 oesa.freebsd_sa_flags = obsa.sa_flags; 190 error = copyout(&oesa, SCARG(uap, osa), sizeof(oesa)); 191 if (error) 192 return (error); 193 } 194 return (0); 195 } 196 197 int 198 freebsd_sys_utrace(struct lwp *l, const struct freebsd_sys_utrace_args *uap, register_t *retval) 199 { 200 /* { 201 syscallarg(void *) addr; 202 syscallarg(size_t) len; 203 } */ 204 205 return ktruser("FreeBSD utrace", SCARG(uap, addr), SCARG(uap, len), 206 0); 207 } 208