linux_ipccall.c revision 1.24.4.1
1 /* $NetBSD: linux_ipccall.c,v 1.24.4.1 2005/04/29 11:28:40 kent Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Frank van der Linden and Eric Haszlakiewicz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: linux_ipccall.c,v 1.24.4.1 2005/04/29 11:28:40 kent Exp $"); 41 42 #if defined(_KERNEL_OPT) 43 #include "opt_sysv.h" 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/shm.h> 48 #include <sys/sem.h> 49 #include <sys/msg.h> 50 #include <sys/proc.h> 51 #include <sys/systm.h> 52 53 /* real syscalls */ 54 #include <sys/mount.h> 55 #include <sys/sa.h> 56 #include <sys/syscallargs.h> 57 58 /* sys_ipc + args prototype */ 59 #include <compat/linux/common/linux_types.h> 60 #include <compat/linux/common/linux_signal.h> 61 62 #include <compat/linux/linux_syscallargs.h> 63 #include <compat/linux/linux_syscall.h> 64 65 /* general ipc defines */ 66 #include <compat/linux/common/linux_ipc.h> 67 68 /* prototypes for real/normal linux-emul syscalls */ 69 #include <compat/linux/common/linux_msg.h> 70 #include <compat/linux/common/linux_shm.h> 71 #include <compat/linux/common/linux_sem.h> 72 73 /* prototypes for sys_ipc stuff */ 74 #include <compat/linux/common/linux_ipccall.h> 75 76 /* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */ 77 /* Not used on: alpha */ 78 79 /* 80 * Stuff to deal with the SysV ipc/shm/semaphore interface in Linux. 81 * The main difference is, that Linux handles it all via one 82 * system call, which has the usual maximum amount of 5 arguments. 83 * This results in a kludge for calls that take 6 of them. 84 * 85 * The SYSV??? options have to be enabled to get the appropriate 86 * functions to work. 87 */ 88 89 int 90 linux_sys_ipc(l, v, retval) 91 struct lwp *l; 92 void *v; 93 register_t *retval; 94 { 95 struct linux_sys_ipc_args /* { 96 syscallarg(int) what; 97 syscallarg(int) a1; 98 syscallarg(int) a2; 99 syscallarg(int) a3; 100 syscallarg(caddr_t) ptr; 101 } */ *uap = v; 102 103 switch (SCARG(uap, what)) { 104 #ifdef SYSVSEM 105 case LINUX_SYS_semop: 106 return linux_semop(l, uap, retval); 107 case LINUX_SYS_semget: 108 return linux_semget(l, uap, retval); 109 case LINUX_SYS_semctl: { 110 struct linux_sys_semctl_args bsa; 111 union linux_semun arg; 112 int error; 113 114 SCARG(&bsa, semid) = SCARG(uap, a1); 115 SCARG(&bsa, semnum) = SCARG(uap, a2); 116 SCARG(&bsa, cmd) = SCARG(uap, a3); 117 /* Convert from (union linux_semun *) to (union linux_semun) */ 118 if ((error = copyin(SCARG(uap, ptr), &arg, sizeof arg))) 119 return error; 120 SCARG(&bsa, arg) = arg; 121 122 return linux_sys_semctl(l, &bsa, retval); 123 } 124 #endif 125 #ifdef SYSVMSG 126 case LINUX_SYS_msgsnd: 127 return linux_msgsnd(l, uap, retval); 128 case LINUX_SYS_msgrcv: 129 return linux_msgrcv(l, uap, retval); 130 case LINUX_SYS_msgget: 131 return linux_msgget(l, uap, retval); 132 case LINUX_SYS_msgctl: { 133 struct linux_sys_msgctl_args bsa; 134 135 SCARG(&bsa, msqid) = SCARG(uap, a1); 136 SCARG(&bsa, cmd) = SCARG(uap, a2); 137 SCARG(&bsa, buf) = (struct linux_msqid_ds *)SCARG(uap, ptr); 138 139 return linux_sys_msgctl(l, &bsa, retval); 140 } 141 #endif 142 #ifdef SYSVSHM 143 case LINUX_SYS_shmat: { 144 struct linux_sys_shmat_args bsa; 145 146 SCARG(&bsa, shmid) = SCARG(uap, a1); 147 SCARG(&bsa, shmaddr) = (void *)SCARG(uap, ptr); 148 SCARG(&bsa, shmflg) = SCARG(uap, a2); 149 /* XXX passing pointer inside int here */ 150 SCARG(&bsa, raddr) = (u_long *)SCARG(uap, a3); 151 152 return linux_sys_shmat(l, &bsa, retval); 153 } 154 case LINUX_SYS_shmdt: 155 return linux_shmdt(l, uap, retval); 156 case LINUX_SYS_shmget: 157 return linux_shmget(l, uap, retval); 158 case LINUX_SYS_shmctl: { 159 struct linux_sys_shmctl_args bsa; 160 161 SCARG(&bsa, shmid) = SCARG(uap, a1); 162 SCARG(&bsa, cmd) = SCARG(uap, a2); 163 SCARG(&bsa, buf) = (struct linux_shmid_ds *)SCARG(uap, ptr); 164 165 return linux_sys_shmctl(l, &bsa, retval); 166 } 167 #endif 168 default: 169 return ENOSYS; 170 } 171 } 172 173 #ifdef SYSVSEM 174 inline int 175 linux_semop(l, uap, retval) 176 struct lwp *l; 177 struct linux_sys_ipc_args /* { 178 syscallarg(int) what; 179 syscallarg(int) a1; 180 syscallarg(int) a2; 181 syscallarg(int) a3; 182 syscallarg(caddr_t) ptr; 183 } */ *uap; 184 register_t *retval; 185 { 186 struct sys_semop_args bsa; 187 188 SCARG(&bsa, semid) = SCARG(uap, a1); 189 SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr); 190 SCARG(&bsa, nsops) = SCARG(uap, a2); 191 192 return sys_semop(l, &bsa, retval); 193 } 194 195 inline int 196 linux_semget(l, uap, retval) 197 struct lwp *l; 198 struct linux_sys_ipc_args /* { 199 syscallarg(int) what; 200 syscallarg(int) a1; 201 syscallarg(int) a2; 202 syscallarg(int) a3; 203 syscallarg(caddr_t) ptr; 204 } */ *uap; 205 register_t *retval; 206 { 207 struct sys_semget_args bsa; 208 209 SCARG(&bsa, key) = (key_t)SCARG(uap, a1); 210 SCARG(&bsa, nsems) = SCARG(uap, a2); 211 SCARG(&bsa, semflg) = SCARG(uap, a3); 212 213 return sys_semget(l, &bsa, retval); 214 } 215 216 #endif /* SYSVSEM */ 217 218 #ifdef SYSVMSG 219 220 inline int 221 linux_msgsnd(l, uap, retval) 222 struct lwp *l; 223 struct linux_sys_ipc_args /* { 224 syscallarg(int) what; 225 syscallarg(int) a1; 226 syscallarg(int) a2; 227 syscallarg(int) a3; 228 syscallarg(caddr_t) ptr; 229 } */ *uap; 230 register_t *retval; 231 { 232 struct sys_msgsnd_args bma; 233 234 SCARG(&bma, msqid) = SCARG(uap, a1); 235 SCARG(&bma, msgp) = SCARG(uap, ptr); 236 SCARG(&bma, msgsz) = SCARG(uap, a2); 237 SCARG(&bma, msgflg) = SCARG(uap, a3); 238 239 return sys_msgsnd(l, &bma, retval); 240 } 241 242 inline int 243 linux_msgrcv(l, uap, retval) 244 struct lwp *l; 245 struct linux_sys_ipc_args /* { 246 syscallarg(int) what; 247 syscallarg(int) a1; 248 syscallarg(int) a2; 249 syscallarg(int) a3; 250 syscallarg(caddr_t) ptr; 251 } */ *uap; 252 register_t *retval; 253 { 254 struct sys_msgrcv_args bma; 255 struct linux_msgrcv_msgarg kluge; 256 int error; 257 258 if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge))) 259 return error; 260 261 SCARG(&bma, msqid) = SCARG(uap, a1); 262 SCARG(&bma, msgp) = kluge.msg; 263 SCARG(&bma, msgsz) = SCARG(uap, a2); 264 SCARG(&bma, msgtyp) = kluge.type; 265 SCARG(&bma, msgflg) = SCARG(uap, a3); 266 267 return sys_msgrcv(l, &bma, retval); 268 } 269 270 inline int 271 linux_msgget(l, uap, retval) 272 struct lwp *l; 273 struct linux_sys_ipc_args /* { 274 syscallarg(int) what; 275 syscallarg(int) a1; 276 syscallarg(int) a2; 277 syscallarg(int) a3; 278 syscallarg(caddr_t) ptr; 279 } */ *uap; 280 register_t *retval; 281 { 282 struct sys_msgget_args bma; 283 284 SCARG(&bma, key) = (key_t)SCARG(uap, a1); 285 SCARG(&bma, msgflg) = SCARG(uap, a2); 286 287 return sys_msgget(l, &bma, retval); 288 } 289 290 #endif /* SYSVMSG */ 291 292 #ifdef SYSVSHM 293 /* 294 * shmdt(): this could have been mapped directly, if it wasn't for 295 * the extra indirection by the linux_ipc system call. 296 */ 297 inline int 298 linux_shmdt(l, uap, retval) 299 struct lwp *l; 300 struct linux_sys_ipc_args /* { 301 syscallarg(int) what; 302 syscallarg(int) a1; 303 syscallarg(int) a2; 304 syscallarg(int) a3; 305 syscallarg(caddr_t) ptr; 306 } */ *uap; 307 register_t *retval; 308 { 309 struct sys_shmdt_args bsa; 310 311 SCARG(&bsa, shmaddr) = SCARG(uap, ptr); 312 313 return sys_shmdt(l, &bsa, retval); 314 } 315 316 /* 317 * Same story as shmdt. 318 */ 319 inline int 320 linux_shmget(l, uap, retval) 321 struct lwp *l; 322 struct linux_sys_ipc_args /* { 323 syscallarg(int) what; 324 syscallarg(int) a1; 325 syscallarg(int) a2; 326 syscallarg(int) a3; 327 syscallarg(caddr_t) ptr; 328 } */ *uap; 329 register_t *retval; 330 { 331 struct sys_shmget_args bsa; 332 333 SCARG(&bsa, key) = SCARG(uap, a1); 334 SCARG(&bsa, size) = SCARG(uap, a2); 335 SCARG(&bsa, shmflg) = SCARG(uap, a3); 336 337 return linux_sys_shmget(l, &bsa, retval); 338 } 339 340 #endif /* SYSVSHM */ 341
Indexes created Tue Sep 23 14:10:03 GMT 2025