linux_ipccall.c revision 1.18
1 /* $NetBSD: linux_ipccall.c,v 1.18 1999/01/03 04:30:56 erh 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/types.h> 40 #include <sys/param.h> 41 #include <sys/shm.h> 42 #include <sys/sem.h> 43 #include <sys/msg.h> 44 #include <sys/proc.h> 45 #include <sys/systm.h> 46 47 /* real syscalls */ 48 #include <sys/mount.h> 49 #include <sys/syscallargs.h> 50 51 52 /* sys_ipc + args prototype */ 53 #include <compat/linux/common/linux_types.h> 54 #include <compat/linux/common/linux_signal.h> 55 56 #include <compat/linux/linux_syscallargs.h> 57 #include <compat/linux/linux_syscall.h> 58 59 /* general ipc defines */ 60 #include <compat/linux/common/linux_ipc.h> 61 62 /* prototypes for real/normal linux-emul syscalls */ 63 #include <compat/linux/common/linux_msg.h> 64 #include <compat/linux/common/linux_shm.h> 65 #include <compat/linux/common/linux_sem.h> 66 67 /* prototypes for sys_ipc stuff */ 68 #include <compat/linux/common/linux_ipccall.h> 69 70 71 /* Used on: arm, i386, m68k, mips, ppc, sparc, sparc64 */ 72 /* Not used on: alpha */ 73 74 /* 75 * Stuff to deal with the SysV ipc/shm/semaphore interface in Linux. 76 * The main difference is, that Linux handles it all via one 77 * system call, which has the usual maximum amount of 5 arguments. 78 * This results in a kludge for calls that take 6 of them. 79 * 80 * The SYSV??? options have to be enabled to get the appropriate 81 * functions to work. 82 */ 83 84 int 85 linux_sys_ipc(p, v, retval) 86 struct proc *p; 87 void *v; 88 register_t *retval; 89 { 90 struct linux_sys_ipc_args /* { 91 syscallarg(int) what; 92 syscallarg(int) a1; 93 syscallarg(int) a2; 94 syscallarg(int) a3; 95 syscallarg(caddr_t) ptr; 96 } */ *uap = v; 97 98 switch (SCARG(uap, what)) { 99 #ifdef SYSVSEM 100 case LINUX_SYS_semop: 101 return linux_semop(p, uap, retval); 102 case LINUX_SYS_semget: 103 return linux_semget(p, uap, retval); 104 case LINUX_SYS_semctl: { 105 struct linux_sys_semctl_args bsa; 106 union linux_semun arg; 107 int error; 108 109 SCARG(&bsa, semid) = SCARG(uap, a1); 110 SCARG(&bsa, semnum) = SCARG(uap, a2); 111 SCARG(&bsa, cmd) = SCARG(uap, a3); 112 /* Convert from (union linux_semun *) to (union linux_semun) */ 113 if ((error = copyin(SCARG(uap, ptr), &arg, sizeof arg))) 114 return error; 115 SCARG(&bsa, arg) = arg; 116 117 return linux_sys_semctl(p, &bsa, retval); 118 } 119 #endif 120 #ifdef SYSVMSG 121 case LINUX_SYS_msgsnd: 122 return linux_msgsnd(p, uap, retval); 123 case LINUX_SYS_msgrcv: 124 return linux_msgrcv(p, uap, retval); 125 case LINUX_SYS_msgget: 126 return linux_msgget(p, uap, retval); 127 case LINUX_SYS_msgctl: { 128 struct linux_sys_msgctl_args bsa; 129 130 SCARG(&bsa, msqid) = SCARG(uap, a1); 131 SCARG(&bsa, cmd) = SCARG(uap, a2); 132 SCARG(&bsa, buf) = (struct linux_msqid_ds *)SCARG(uap, ptr); 133 134 return linux_sys_msgctl(p, &bsa, retval); 135 } 136 #endif 137 #ifdef SYSVSHM 138 case LINUX_SYS_shmat: { 139 struct linux_sys_shmat_args bsa; 140 141 SCARG(&bsa, shmid) = SCARG(uap, a1); 142 SCARG(&bsa, shmaddr) = (void *)SCARG(uap, ptr); 143 SCARG(&bsa, shmflg) = SCARG(uap, a2); 144 /* XXX passing pointer inside int here */ 145 SCARG(&bsa, raddr) = (u_long *)SCARG(uap, a3); 146 147 return linux_sys_shmat(p, &bsa, retval); 148 } 149 case LINUX_SYS_shmdt: 150 return linux_shmdt(p, uap, retval); 151 case LINUX_SYS_shmget: 152 return linux_shmget(p, uap, retval); 153 case LINUX_SYS_shmctl: { 154 struct linux_sys_shmctl_args bsa; 155 156 SCARG(&bsa, shmid) = SCARG(uap, a1); 157 SCARG(&bsa, cmd) = SCARG(uap, a2); 158 SCARG(&bsa, buf) = (struct linux_shmid_ds *)SCARG(uap, ptr); 159 160 return linux_sys_shmctl(p, &bsa, retval); 161 } 162 #endif 163 default: 164 return ENOSYS; 165 } 166 } 167 168 #ifdef SYSVSEM 169 inline int 170 linux_semop(p, uap, retval) 171 struct proc *p; 172 struct linux_sys_ipc_args /* { 173 syscallarg(int) what; 174 syscallarg(int) a1; 175 syscallarg(int) a2; 176 syscallarg(int) a3; 177 syscallarg(caddr_t) ptr; 178 } */ *uap; 179 register_t *retval; 180 { 181 struct sys_semop_args bsa; 182 183 SCARG(&bsa, semid) = SCARG(uap, a1); 184 SCARG(&bsa, sops) = (struct sembuf *)SCARG(uap, ptr); 185 SCARG(&bsa, nsops) = SCARG(uap, a2); 186 187 return sys_semop(p, &bsa, retval); 188 } 189 190 inline int 191 linux_semget(p, uap, retval) 192 struct proc *p; 193 struct linux_sys_ipc_args /* { 194 syscallarg(int) what; 195 syscallarg(int) a1; 196 syscallarg(int) a2; 197 syscallarg(int) a3; 198 syscallarg(caddr_t) ptr; 199 } */ *uap; 200 register_t *retval; 201 { 202 struct sys_semget_args bsa; 203 204 SCARG(&bsa, key) = (key_t)SCARG(uap, a1); 205 SCARG(&bsa, nsems) = SCARG(uap, a2); 206 SCARG(&bsa, semflg) = SCARG(uap, a3); 207 208 return sys_semget(p, &bsa, retval); 209 } 210 211 #endif /* SYSVSEM */ 212 213 #ifdef SYSVMSG 214 215 inline int 216 linux_msgsnd(p, uap, retval) 217 struct proc *p; 218 struct linux_sys_ipc_args /* { 219 syscallarg(int) what; 220 syscallarg(int) a1; 221 syscallarg(int) a2; 222 syscallarg(int) a3; 223 syscallarg(caddr_t) ptr; 224 } */ *uap; 225 register_t *retval; 226 { 227 struct sys_msgsnd_args bma; 228 229 SCARG(&bma, msqid) = SCARG(uap, a1); 230 SCARG(&bma, msgp) = SCARG(uap, ptr); 231 SCARG(&bma, msgsz) = SCARG(uap, a2); 232 SCARG(&bma, msgflg) = SCARG(uap, a3); 233 234 return sys_msgsnd(p, &bma, retval); 235 } 236 237 inline int 238 linux_msgrcv(p, uap, retval) 239 struct proc *p; 240 struct linux_sys_ipc_args /* { 241 syscallarg(int) what; 242 syscallarg(int) a1; 243 syscallarg(int) a2; 244 syscallarg(int) a3; 245 syscallarg(caddr_t) ptr; 246 } */ *uap; 247 register_t *retval; 248 { 249 struct sys_msgrcv_args bma; 250 struct linux_msgrcv_msgarg kluge; 251 int error; 252 253 if ((error = copyin(SCARG(uap, ptr), &kluge, sizeof kluge))) 254 return error; 255 256 SCARG(&bma, msqid) = SCARG(uap, a1); 257 SCARG(&bma, msgp) = kluge.msg; 258 SCARG(&bma, msgsz) = SCARG(uap, a2); 259 SCARG(&bma, msgtyp) = kluge.type; 260 SCARG(&bma, msgflg) = SCARG(uap, a3); 261 262 return sys_msgrcv(p, &bma, retval); 263 } 264 265 inline int 266 linux_msgget(p, uap, retval) 267 struct proc *p; 268 struct linux_sys_ipc_args /* { 269 syscallarg(int) what; 270 syscallarg(int) a1; 271 syscallarg(int) a2; 272 syscallarg(int) a3; 273 syscallarg(caddr_t) ptr; 274 } */ *uap; 275 register_t *retval; 276 { 277 struct sys_msgget_args bma; 278 279 SCARG(&bma, key) = (key_t)SCARG(uap, a1); 280 SCARG(&bma, msgflg) = SCARG(uap, a2); 281 282 return sys_msgget(p, &bma, retval); 283 } 284 285 #endif /* SYSVMSG */ 286 287 #ifdef SYSVSHM 288 /* 289 * shmdt(): this could have been mapped directly, if it wasn't for 290 * the extra indirection by the linux_ipc system call. 291 */ 292 inline int 293 linux_shmdt(p, uap, retval) 294 struct proc *p; 295 struct linux_sys_ipc_args /* { 296 syscallarg(int) what; 297 syscallarg(int) a1; 298 syscallarg(int) a2; 299 syscallarg(int) a3; 300 syscallarg(caddr_t) ptr; 301 } */ *uap; 302 register_t *retval; 303 { 304 struct sys_shmdt_args bsa; 305 306 SCARG(&bsa, shmaddr) = SCARG(uap, ptr); 307 308 return sys_shmdt(p, &bsa, retval); 309 } 310 311 /* 312 * Same story as shmdt. 313 */ 314 inline int 315 linux_shmget(p, uap, retval) 316 struct proc *p; 317 struct linux_sys_ipc_args /* { 318 syscallarg(int) what; 319 syscallarg(int) a1; 320 syscallarg(int) a2; 321 syscallarg(int) a3; 322 syscallarg(caddr_t) ptr; 323 } */ *uap; 324 register_t *retval; 325 { 326 struct sys_shmget_args bsa; 327 328 SCARG(&bsa, key) = SCARG(uap, a1); 329 SCARG(&bsa, size) = SCARG(uap, a2); 330 SCARG(&bsa, shmflg) = SCARG(uap, a3); 331 332 return sys_shmget(p, &bsa, retval); 333 } 334 335 #endif /* SYSVSHM */ 336
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