svr4_sysvec.c revision 183040
1/*- 2 * Copyright (c) 1998 Mark Newton 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by Christos Zoulas. 16 * 4. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include <sys/cdefs.h> 32__FBSDID("$FreeBSD: head/sys/compat/svr4/svr4_sysvec.c 183040 2008-09-15 15:09:35Z ed $"); 33 34/* XXX we use functions that might not exist. */ 35#include "opt_compat.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/proc.h> 40#include <sys/sysent.h> 41#include <sys/imgact.h> 42#include <sys/imgact_elf.h> 43#include <sys/fcntl.h> 44#include <sys/lock.h> 45#include <sys/malloc.h> 46#include <sys/module.h> 47#include <sys/mutex.h> 48#include <sys/namei.h> 49#include <sys/socket.h> 50#include <sys/syscallsubr.h> 51#include <sys/vnode.h> 52#include <vm/vm.h> 53#include <sys/exec.h> 54#include <sys/kernel.h> 55#include <machine/cpu.h> 56#include <netinet/in.h> 57 58#include <compat/svr4/svr4.h> 59#include <compat/svr4/svr4_types.h> 60#include <compat/svr4/svr4_syscall.h> 61#include <compat/svr4/svr4_signal.h> 62#include <compat/svr4/svr4_socket.h> 63#include <compat/svr4/svr4_sockio.h> 64#include <compat/svr4/svr4_errno.h> 65#include <compat/svr4/svr4_proto.h> 66#include <compat/svr4/svr4_siginfo.h> 67#include <compat/svr4/svr4_util.h> 68 69int bsd_to_svr4_errno[ELAST+1] = { 70 0, 71 SVR4_EPERM, 72 SVR4_ENOENT, 73 SVR4_ESRCH, 74 SVR4_EINTR, 75 SVR4_EIO, 76 SVR4_ENXIO, 77 SVR4_E2BIG, 78 SVR4_ENOEXEC, 79 SVR4_EBADF, 80 SVR4_ECHILD, 81 SVR4_EDEADLK, 82 SVR4_ENOMEM, 83 SVR4_EACCES, 84 SVR4_EFAULT, 85 SVR4_ENOTBLK, 86 SVR4_EBUSY, 87 SVR4_EEXIST, 88 SVR4_EXDEV, 89 SVR4_ENODEV, 90 SVR4_ENOTDIR, 91 SVR4_EISDIR, 92 SVR4_EINVAL, 93 SVR4_ENFILE, 94 SVR4_EMFILE, 95 SVR4_ENOTTY, 96 SVR4_ETXTBSY, 97 SVR4_EFBIG, 98 SVR4_ENOSPC, 99 SVR4_ESPIPE, 100 SVR4_EROFS, 101 SVR4_EMLINK, 102 SVR4_EPIPE, 103 SVR4_EDOM, 104 SVR4_ERANGE, 105 SVR4_EAGAIN, 106 SVR4_EINPROGRESS, 107 SVR4_EALREADY, 108 SVR4_ENOTSOCK, 109 SVR4_EDESTADDRREQ, 110 SVR4_EMSGSIZE, 111 SVR4_EPROTOTYPE, 112 SVR4_ENOPROTOOPT, 113 SVR4_EPROTONOSUPPORT, 114 SVR4_ESOCKTNOSUPPORT, 115 SVR4_EOPNOTSUPP, 116 SVR4_EPFNOSUPPORT, 117 SVR4_EAFNOSUPPORT, 118 SVR4_EADDRINUSE, 119 SVR4_EADDRNOTAVAIL, 120 SVR4_ENETDOWN, 121 SVR4_ENETUNREACH, 122 SVR4_ENETRESET, 123 SVR4_ECONNABORTED, 124 SVR4_ECONNRESET, 125 SVR4_ENOBUFS, 126 SVR4_EISCONN, 127 SVR4_ENOTCONN, 128 SVR4_ESHUTDOWN, 129 SVR4_ETOOMANYREFS, 130 SVR4_ETIMEDOUT, 131 SVR4_ECONNREFUSED, 132 SVR4_ELOOP, 133 SVR4_ENAMETOOLONG, 134 SVR4_EHOSTDOWN, 135 SVR4_EHOSTUNREACH, 136 SVR4_ENOTEMPTY, 137 SVR4_EPROCLIM, 138 SVR4_EUSERS, 139 SVR4_EDQUOT, 140 SVR4_ESTALE, 141 SVR4_EREMOTE, 142 SVR4_EBADRPC, 143 SVR4_ERPCMISMATCH, 144 SVR4_EPROGUNAVAIL, 145 SVR4_EPROGMISMATCH, 146 SVR4_EPROCUNAVAIL, 147 SVR4_ENOLCK, 148 SVR4_ENOSYS, 149 SVR4_EFTYPE, 150 SVR4_EAUTH, 151 SVR4_ENEEDAUTH, 152 SVR4_EIDRM, 153 SVR4_ENOMSG, 154}; 155 156 157static int svr4_fixup(register_t **stack_base, struct image_params *imgp); 158 159extern struct sysent svr4_sysent[]; 160#undef szsigcode 161#undef sigcode 162 163extern int svr4_szsigcode; 164extern char svr4_sigcode[]; 165 166struct sysentvec svr4_sysvec = { 167 SVR4_SYS_MAXSYSCALL, 168 svr4_sysent, 169 0xff, 170 SVR4_NSIG-1, /* NB: signal trans table indexed with signno-1 */ 171 bsd_to_svr4_sig+1, 172 ELAST, /* ELAST */ 173 bsd_to_svr4_errno, 174 NULL, 175 svr4_fixup, 176 svr4_sendsig, 177 svr4_sigcode, 178 &svr4_szsigcode, 179 NULL, 180 "SVR4", 181 elf32_coredump, 182 NULL, 183 SVR4_MINSIGSTKSZ, 184 PAGE_SIZE, 185 VM_MIN_ADDRESS, 186 VM_MAXUSER_ADDRESS, 187 USRSTACK, 188 PS_STRINGS, 189 VM_PROT_ALL, 190 exec_copyout_strings, 191 exec_setregs, 192 NULL 193}; 194 195const char svr4_emul_path[] = "/compat/svr4"; 196 197Elf32_Brandinfo svr4_brand = { 198 ELFOSABI_SYSV, 199 EM_386, /* XXX only implemented for x86 so far. */ 200 "SVR4", 201 svr4_emul_path, 202 "/lib/libc.so.1", 203 &svr4_sysvec, 204 NULL, 205}; 206 207static int 208svr4_fixup(register_t **stack_base, struct image_params *imgp) 209{ 210 Elf32_Auxargs *args; 211 register_t *pos; 212 213 KASSERT(curthread->td_proc == imgp->proc, 214 ("unsafe svr4_fixup(), should be curproc")); 215 args = (Elf32_Auxargs *)imgp->auxargs; 216 pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2); 217 218 if (args->trace) 219 AUXARGS_ENTRY(pos, AT_DEBUG, 1); 220 if (args->execfd != -1) 221 AUXARGS_ENTRY(pos, AT_EXECFD, args->execfd); 222 AUXARGS_ENTRY(pos, AT_PHDR, args->phdr); 223 AUXARGS_ENTRY(pos, AT_PHENT, args->phent); 224 AUXARGS_ENTRY(pos, AT_PHNUM, args->phnum); 225 AUXARGS_ENTRY(pos, AT_PAGESZ, args->pagesz); 226 AUXARGS_ENTRY(pos, AT_FLAGS, args->flags); 227 AUXARGS_ENTRY(pos, AT_ENTRY, args->entry); 228 AUXARGS_ENTRY(pos, AT_BASE, args->base); 229 AUXARGS_ENTRY(pos, AT_UID, imgp->proc->p_ucred->cr_ruid); 230 AUXARGS_ENTRY(pos, AT_EUID, imgp->proc->p_ucred->cr_svuid); 231 AUXARGS_ENTRY(pos, AT_GID, imgp->proc->p_ucred->cr_rgid); 232 AUXARGS_ENTRY(pos, AT_EGID, imgp->proc->p_ucred->cr_svgid); 233 AUXARGS_ENTRY(pos, AT_NULL, 0); 234 235 free(imgp->auxargs, M_TEMP); 236 imgp->auxargs = NULL; 237 238 (*stack_base)--; 239 **stack_base = (register_t)imgp->args->argc; 240 return 0; 241} 242 243/* 244 * Search an alternate path before passing pathname arguments on 245 * to system calls. Useful for keeping a separate 'emulation tree'. 246 * 247 * If cflag is set, we check if an attempt can be made to create 248 * the named file, i.e. we check if the directory it should 249 * be in exists. 250 */ 251int 252svr4_emul_find(struct thread *td, char *path, enum uio_seg pathseg, 253 char **pbuf, int create) 254{ 255 256 return (kern_alternate_path(td, svr4_emul_path, path, pathseg, pbuf, 257 create, AT_FDCWD)); 258} 259 260static int 261svr4_elf_modevent(module_t mod, int type, void *data) 262{ 263 int error; 264 265 error = 0; 266 267 switch(type) { 268 case MOD_LOAD: 269 if (elf32_insert_brand_entry(&svr4_brand) < 0) { 270 printf("cannot insert svr4 elf brand handler\n"); 271 error = EINVAL; 272 break; 273 } 274 if (bootverbose) 275 printf("svr4 ELF exec handler installed\n"); 276 svr4_sockcache_init(); 277 break; 278 case MOD_UNLOAD: 279 /* Only allow the emulator to be removed if it isn't in use. */ 280 if (elf32_brand_inuse(&svr4_brand) != 0) { 281 error = EBUSY; 282 } else if (elf32_remove_brand_entry(&svr4_brand) < 0) { 283 error = EINVAL; 284 } 285 286 if (error) { 287 printf("Could not deinstall ELF interpreter entry (error %d)\n", 288 error); 289 break; 290 } 291 if (bootverbose) 292 printf("svr4 ELF exec handler removed\n"); 293 svr4_sockcache_destroy(); 294 break; 295 default: 296 return (EOPNOTSUPP); 297 break; 298 } 299 return error; 300} 301 302static moduledata_t svr4_elf_mod = { 303 "svr4elf", 304 svr4_elf_modevent, 305 0 306}; 307DECLARE_MODULE(svr4elf, svr4_elf_mod, SI_SUB_EXEC, SI_ORDER_ANY); 308MODULE_DEPEND(svr4elf, streams, 1, 1, 1); 309