1 /*- 2 * Copyright (c) 1982, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 * 7 * @(#)kern_exec.c 8.3 (Berkeley) 09/23/93 8 */ 9 10 #include <sys/param.h> 11 #include <sys/systm.h> 12 #include <sys/filedesc.h> 13 #include <sys/kernel.h> 14 #include <sys/proc.h> 15 #include <sys/mount.h> 16 #include <sys/malloc.h> 17 #include <sys/namei.h> 18 #include <sys/vnode.h> 19 #include <sys/file.h> 20 #include <sys/acct.h> 21 #include <sys/exec.h> 22 #include <sys/ktrace.h> 23 #include <sys/resourcevar.h> 24 25 #include <machine/cpu.h> 26 #include <machine/reg.h> 27 28 #include <sys/mman.h> 29 #include <vm/vm.h> 30 #include <vm/vm_param.h> 31 #include <vm/vm_map.h> 32 #include <vm/vm_kern.h> 33 #include <vm/vm_pager.h> 34 35 #include <sys/signalvar.h> 36 37 #ifdef HPUXCOMPAT 38 #include <sys/user.h> /* for pcb */ 39 #include <hp/hpux/hpux_exec.h> 40 #endif 41 42 #ifdef COPY_SIGCODE 43 extern char sigcode[], esigcode[]; 44 #define szsigcode (esigcode - sigcode) 45 #else 46 #define szsigcode 0 47 #endif 48 49 /* 50 * exec system call 51 */ 52 execve(p, uap, retval) 53 register struct proc *p; 54 register struct execve_args *uap; 55 int *retval; 56 { 57 register struct ucred *cred = p->p_ucred; 58 register struct filedesc *fdp = p->p_fd; 59 int na, ne, ucp, ap, cc, ssize; 60 register char *cp; 61 register int nc; 62 unsigned len; 63 int indir, uid, gid; 64 char *sharg; 65 struct vnode *vp; 66 int resid, error, paged = 0; 67 vm_offset_t execargs = 0; 68 struct vattr vattr; 69 char cfarg[MAXINTERP]; 70 union { 71 char ex_shell[MAXINTERP]; /* #! and interpreter name */ 72 struct exec ex_exec; 73 #ifdef HPUXCOMPAT 74 struct hpux_exec ex_hexec; 75 #endif 76 } exdata; 77 #ifdef HPUXCOMPAT 78 struct hpux_exec hhead; 79 #endif 80 struct nameidata nd; 81 struct ps_strings ps; 82 83 NDINIT(&nd, LOOKUP, FOLLOW | SAVENAME, UIO_USERSPACE, 84 uap->fname, p); 85 if (error = namei(&nd)) 86 return (error); 87 vp = nd.ni_vp; 88 LEASE_CHECK(vp, p, cred, LEASE_READ); 89 VOP_LOCK(vp); 90 indir = 0; 91 uid = cred->cr_uid; 92 gid = cred->cr_gid; 93 if (error = VOP_GETATTR(vp, &vattr, cred, p)) 94 goto bad; 95 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 96 error = EACCES; 97 goto bad; 98 } 99 if ((vp->v_mount->mnt_flag & MNT_NOSUID) == 0) { 100 if (vattr.va_mode & VSUID) 101 uid = vattr.va_uid; 102 if (vattr.va_mode & VSGID) 103 gid = vattr.va_gid; 104 } 105 106 again: 107 if (error = VOP_ACCESS(vp, VEXEC, cred, p)) 108 goto bad; 109 if ((p->p_flag & P_TRACED) && (error = VOP_ACCESS(vp, VREAD, cred, p))) 110 goto bad; 111 if (vp->v_type != VREG || 112 (vattr.va_mode & (VEXEC|(VEXEC>>3)|(VEXEC>>6))) == 0) { 113 error = EACCES; 114 goto bad; 115 } 116 117 /* 118 * Read in first few bytes of file for segment sizes, magic number: 119 * OMAGIC = plain executable 120 * NMAGIC = RO text 121 * ZMAGIC = demand paged RO text 122 * Also an ASCII line beginning with #! is 123 * the file name of a ``shell'' and arguments may be prepended 124 * to the argument list if given here. 125 * 126 * SHELL NAMES ARE LIMITED IN LENGTH. 127 * 128 * ONLY ONE ARGUMENT MAY BE PASSED TO THE SHELL FROM 129 * THE ASCII LINE. 130 */ 131 exdata.ex_shell[0] = '\0'; /* for zero length files */ 132 error = vn_rdwr(UIO_READ, vp, (caddr_t)&exdata, sizeof (exdata), 133 (off_t)0, UIO_SYSSPACE, (IO_UNIT|IO_NODELOCKED), cred, &resid, 134 (struct proc *)0); 135 if (error) 136 goto bad; 137 #ifndef lint 138 if (resid > sizeof(exdata) - sizeof(exdata.ex_exec) && 139 exdata.ex_shell[0] != '#') { 140 error = ENOEXEC; 141 goto bad; 142 } 143 #endif 144 #if defined(hp300) || defined(luna68k) 145 switch ((int)exdata.ex_exec.a_mid) { 146 147 /* 148 * An ancient hp200 or hp300 binary, shouldn't happen anymore. 149 * Mark as invalid. 150 */ 151 case MID_ZERO: 152 exdata.ex_exec.a_magic = 0; 153 break; 154 155 /* 156 * HP200 series has a smaller page size so we cannot 157 * demand-load or even write protect text, so we just 158 * treat as OMAGIC. 159 */ 160 case MID_HP200: 161 exdata.ex_exec.a_magic = OMAGIC; 162 break; 163 164 case MID_HP300: 165 break; 166 167 #ifdef HPUXCOMPAT 168 case MID_HPUX: 169 /* 170 * Save a.out header. This is eventually saved in the pcb, 171 * but we cannot do that yet in case the exec fails before 172 * the image is overlayed. 173 */ 174 bcopy((caddr_t)&exdata.ex_hexec, 175 (caddr_t)&hhead, sizeof hhead); 176 /* 177 * Shuffle important fields to their BSD locations. 178 * Note that the order in which this is done is important. 179 */ 180 exdata.ex_exec.a_text = exdata.ex_hexec.ha_text; 181 exdata.ex_exec.a_data = exdata.ex_hexec.ha_data; 182 exdata.ex_exec.a_bss = exdata.ex_hexec.ha_bss; 183 exdata.ex_exec.a_entry = exdata.ex_hexec.ha_entry; 184 /* 185 * For ZMAGIC files, make sizes consistant with those 186 * generated by BSD ld. 187 */ 188 if (exdata.ex_exec.a_magic == ZMAGIC) { 189 exdata.ex_exec.a_text = 190 ctob(btoc(exdata.ex_exec.a_text)); 191 nc = exdata.ex_exec.a_data + exdata.ex_exec.a_bss; 192 exdata.ex_exec.a_data = 193 ctob(btoc(exdata.ex_exec.a_data)); 194 nc -= (int)exdata.ex_exec.a_data; 195 exdata.ex_exec.a_bss = (nc < 0) ? 0 : nc; 196 } 197 break; 198 #endif 199 } 200 #endif 201 switch ((int)exdata.ex_exec.a_magic) { 202 203 case OMAGIC: 204 #ifdef COFF 205 if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) { 206 error = ENOEXEC; 207 goto bad; 208 } 209 #endif 210 #ifdef sparc 211 if (exdata.ex_exec.a_mid != MID_SUN_SPARC) { 212 error = ENOEXEC; 213 goto bad; 214 } 215 #endif 216 exdata.ex_exec.a_data += exdata.ex_exec.a_text; 217 exdata.ex_exec.a_text = 0; 218 break; 219 220 case ZMAGIC: 221 paged = 1; 222 /* FALLTHROUGH */ 223 224 case NMAGIC: 225 #ifdef COFF 226 if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) { 227 error = ENOEXEC; 228 goto bad; 229 } 230 #endif 231 #ifdef sparc 232 if (exdata.ex_exec.a_mid != MID_SUN_SPARC) { 233 error = ENOEXEC; 234 goto bad; 235 } 236 #endif 237 if (exdata.ex_exec.a_text == 0) { 238 error = ENOEXEC; 239 goto bad; 240 } 241 break; 242 243 default: 244 if (exdata.ex_shell[0] != '#' || 245 exdata.ex_shell[1] != '!' || 246 indir) { 247 error = ENOEXEC; 248 goto bad; 249 } 250 for (cp = &exdata.ex_shell[2];; ++cp) { 251 if (cp >= &exdata.ex_shell[MAXINTERP]) { 252 error = ENOEXEC; 253 goto bad; 254 } 255 if (*cp == '\n') { 256 *cp = '\0'; 257 break; 258 } 259 if (*cp == '\t') 260 *cp = ' '; 261 } 262 cp = &exdata.ex_shell[2]; 263 while (*cp == ' ') 264 cp++; 265 nd.ni_dirp = cp; 266 while (*cp && *cp != ' ') 267 cp++; 268 cfarg[0] = '\0'; 269 if (*cp) { 270 *cp++ = '\0'; 271 while (*cp == ' ') 272 cp++; 273 if (*cp) 274 bcopy((caddr_t)cp, (caddr_t)cfarg, MAXINTERP); 275 } 276 indir = 1; 277 vput(vp); 278 nd.ni_segflg = UIO_SYSSPACE; 279 if (error = namei(&nd)) 280 return (error); 281 vp = nd.ni_vp; 282 LEASE_CHECK(vp, p, cred, LEASE_READ); 283 VOP_LOCK(vp); 284 if (error = VOP_GETATTR(vp, &vattr, cred, p)) 285 goto bad; 286 uid = cred->cr_uid; /* shell scripts can't be setuid */ 287 gid = cred->cr_gid; 288 goto again; 289 } 290 291 /* 292 * Collect arguments on "file" in swap space. 293 */ 294 na = 0; 295 ne = 0; 296 nc = 0; 297 cc = NCARGS; 298 execargs = kmem_alloc_wait(exec_map, NCARGS); 299 #ifdef DIAGNOSTIC 300 if (execargs == (vm_offset_t)0) 301 panic("execve: kmem_alloc_wait"); 302 #endif 303 cp = (char *) execargs; 304 /* 305 * Copy arguments into file in argdev area. 306 */ 307 if (uap->argp) for (;;) { 308 ap = NULL; 309 sharg = NULL; 310 if (indir && na == 0) { 311 sharg = nd.ni_cnd.cn_nameptr; 312 ap = (int)sharg; 313 uap->argp++; /* ignore argv[0] */ 314 } else if (indir && (na == 1 && cfarg[0])) { 315 sharg = cfarg; 316 ap = (int)sharg; 317 } else if (indir && (na == 1 || na == 2 && cfarg[0])) 318 ap = (int)uap->fname; 319 else if (uap->argp) { 320 ap = fuword((caddr_t)uap->argp); 321 uap->argp++; 322 } 323 if (ap == NULL && uap->envp) { 324 uap->argp = NULL; 325 if ((ap = fuword((caddr_t)uap->envp)) != NULL) 326 uap->envp++, ne++; 327 } 328 if (ap == NULL) 329 break; 330 na++; 331 if (ap == -1) { 332 error = EFAULT; 333 goto bad; 334 } 335 do { 336 if (nc >= NCARGS-1) { 337 error = E2BIG; 338 break; 339 } 340 if (sharg) { 341 error = copystr(sharg, cp, (unsigned)cc, &len); 342 sharg += len; 343 } else { 344 error = copyinstr((caddr_t)ap, cp, (unsigned)cc, 345 &len); 346 ap += len; 347 } 348 cp += len; 349 nc += len; 350 cc -= len; 351 } while (error == ENAMETOOLONG); 352 if (error) 353 goto bad; 354 } 355 356 /* 357 * XXX the following is excessively bogus 358 * 359 * Compute initial process stack size and location of argc 360 * and character strings. `nc' is currently just the number 361 * of characters of arg and env strings. 362 * 363 * nc = size of ps_strings structure + 364 * size of signal code + 365 * 4 bytes of NULL pointer + 366 * nc, 367 * rounded to nearest integer; 368 * ucp = USRSTACK - nc; [user characters pointer] 369 * apsize = padding (if any) + 370 * 4 bytes of NULL pointer + 371 * ne 4-byte pointers to env strings + 372 * 4 bytes of NULL pointer + 373 * (na-ne) 4-byte pointers to arg strings + 374 * 4 bytes of argc; 375 * (this is the same as nc + (na+3)*4) 376 * ap = ucp - apsize; [user address of argc] 377 * ssize = ssize + nc + machine-dependent space; 378 */ 379 nc = (sizeof(ps) + szsigcode + 4 + nc + NBPW-1) & ~(NBPW - 1); 380 #if defined(sparc) || defined(mips) 381 ucp = USRSTACK; 382 ssize = ALIGN(nc + (na + 3) * NBPW); 383 ap = ucp - ssize; 384 ucp -= nc; 385 #ifdef sparc 386 ssize += sizeof(struct rwindow); 387 #endif 388 #else 389 ssize = (na + 3) * NBPW; 390 ucp = USRSTACK - nc; 391 ap = ucp - ssize; 392 ssize += nc; 393 #endif 394 error = getxfile(p, vp, &exdata.ex_exec, paged, ssize, uid, gid); 395 if (error) 396 goto bad; 397 vput(vp); 398 vp = NULL; 399 400 #ifdef HPUXCOMPAT 401 /* 402 * We are now committed to the exec so we can save the exec 403 * header in the pcb where we can dump it if necessary in core() 404 */ 405 if (p->p_md.md_flags & MDP_HPUX) 406 bcopy((caddr_t)&hhead, 407 (caddr_t)p->p_addr->u_md.md_exec, sizeof hhead); 408 #endif 409 410 /* 411 * Copy back arglist. 412 */ 413 cpu_setstack(p, ap); 414 (void) suword((caddr_t)ap, na-ne); 415 nc = 0; 416 cp = (char *) execargs; 417 cc = NCARGS; 418 ps.ps_argvstr = (char *)ucp; /* first argv string */ 419 ps.ps_nargvstr = na - ne; /* argc */ 420 for (;;) { 421 ap += NBPW; 422 if (na == ne) { 423 (void) suword((caddr_t)ap, 0); 424 ap += NBPW; 425 ps.ps_envstr = (char *)ucp; 426 ps.ps_nenvstr = ne; 427 } 428 if (--na < 0) 429 break; 430 (void) suword((caddr_t)ap, ucp); 431 do { 432 error = copyoutstr(cp, (caddr_t)ucp, (unsigned)cc, 433 &len); 434 ucp += len; 435 cp += len; 436 nc += len; 437 cc -= len; 438 } while (error == ENAMETOOLONG); 439 if (error == EFAULT) 440 panic("exec: EFAULT"); 441 } 442 (void) suword((caddr_t)ap, 0); 443 (void) copyout((caddr_t)&ps, (caddr_t)PS_STRINGS, sizeof(ps)); 444 445 execsigs(p); 446 447 for (nc = fdp->fd_lastfile; nc >= 0; --nc) { 448 if (fdp->fd_ofileflags[nc] & UF_EXCLOSE) { 449 (void) closef(fdp->fd_ofiles[nc], p); 450 fdp->fd_ofiles[nc] = NULL; 451 fdp->fd_ofileflags[nc] = 0; 452 if (nc < fdp->fd_freefile) 453 fdp->fd_freefile = nc; 454 } 455 fdp->fd_ofileflags[nc] &= ~UF_MAPPED; 456 } 457 /* 458 * Adjust fd_lastfile to account for descriptors closed above. 459 * Don't decrement fd_lastfile past 0, as it's unsigned. 460 */ 461 while (fdp->fd_lastfile > 0 && fdp->fd_ofiles[fdp->fd_lastfile] == NULL) 462 fdp->fd_lastfile--; 463 setregs(p, exdata.ex_exec.a_entry, retval); 464 #ifdef COPY_SIGCODE 465 /* 466 * Install sigcode at top of user stack. 467 */ 468 copyout((caddr_t)sigcode, (caddr_t)PS_STRINGS - szsigcode, szsigcode); 469 #endif 470 /* 471 * Remember file name for accounting. 472 */ 473 p->p_acflag &= ~AFORK; 474 if (nd.ni_cnd.cn_namelen > MAXCOMLEN) 475 nd.ni_cnd.cn_namelen = MAXCOMLEN; 476 bcopy((caddr_t)nd.ni_cnd.cn_nameptr, (caddr_t)p->p_comm, 477 (unsigned)nd.ni_cnd.cn_namelen); 478 p->p_comm[nd.ni_cnd.cn_namelen] = '\0'; 479 cpu_exec(p); 480 bad: 481 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 482 if (execargs) 483 kmem_free_wakeup(exec_map, execargs, NCARGS); 484 if (vp) 485 vput(vp); 486 return (error); 487 } 488 489 /* 490 * Read in and set up memory for executed file. 491 */ 492 getxfile(p, vp, ep, paged, ssize, uid, gid) 493 register struct proc *p; 494 register struct vnode *vp; 495 register struct exec *ep; 496 int paged, ssize, uid, gid; 497 { 498 register struct ucred *cred = p->p_ucred; 499 register struct vmspace *vm = p->p_vmspace; 500 vm_offset_t addr; 501 vm_size_t xts, size; 502 segsz_t ds; 503 off_t toff; 504 int error = 0; 505 506 #ifdef HPUXCOMPAT 507 if (ep->a_mid == MID_HPUX) 508 toff = paged ? CLBYTES : sizeof(struct hpux_exec); 509 else 510 #endif 511 #ifdef COFF 512 toff = N_TXTOFF(*ep); 513 #else 514 #ifdef sparc 515 if (ep->a_mid == MID_SUN_SPARC) 516 toff = paged ? 0 : sizeof(struct exec); 517 else 518 #endif 519 if (paged) 520 #ifdef mips 521 toff = 0; 522 #else 523 toff = CLBYTES; 524 #endif 525 else 526 toff = sizeof (struct exec); 527 #endif 528 if (ep->a_text != 0 && (vp->v_flag & VTEXT) == 0 && 529 vp->v_writecount != 0) 530 return (ETXTBSY); 531 532 /* 533 * Compute text and data sizes and make sure not too large. 534 * Text size is rounded to an ``ld page''; data+bss is left 535 * in machine pages. Check data and bss separately as they 536 * may overflow when summed together. (XXX not done yet) 537 */ 538 xts = roundup(ep->a_text, __LDPGSZ); 539 ds = clrnd(btoc(ep->a_data + ep->a_bss)); 540 541 /* 542 * If we're sharing the address space, allocate a new space 543 * and release our reference to the old one. Otherwise, 544 * empty out the existing vmspace. 545 */ 546 #ifdef sparc 547 kill_user_windows(p); /* before addrs go away */ 548 #endif 549 if (vm->vm_refcnt > 1) { 550 p->p_vmspace = vmspace_alloc(VM_MIN_ADDRESS, 551 VM_MAXUSER_ADDRESS, 1); 552 vmspace_free(vm); 553 vm = p->p_vmspace; 554 } else { 555 #ifdef SYSVSHM 556 if (vm->vm_shm) 557 shmexit(p); 558 #endif 559 (void) vm_map_remove(&vm->vm_map, VM_MIN_ADDRESS, 560 VM_MAXUSER_ADDRESS); 561 } 562 /* 563 * If parent is waiting for us to exec or exit, 564 * P_PPWAIT will be set; clear it and wakeup parent. 565 */ 566 if (p->p_flag & P_PPWAIT) { 567 p->p_flag &= ~P_PPWAIT; 568 wakeup((caddr_t) p->p_pptr); 569 } 570 #if defined(HP380) || defined(LUNA2) 571 /* default to copyback caching on 68040 */ 572 if (mmutype == MMU_68040) 573 p->p_md.md_flags |= (MDP_CCBDATA|MDP_CCBSTACK); 574 #endif 575 #ifdef HPUXCOMPAT 576 p->p_md.md_flags &= ~(MDP_HPUX|MDP_HPUXMMAP); 577 /* note that we are an HP-UX binary */ 578 if (ep->a_mid == MID_HPUX) 579 p->p_md.md_flags |= MDP_HPUX; 580 /* deal with miscellaneous attributes */ 581 if (ep->a_trsize & HPUXM_VALID) { 582 if (ep->a_trsize & HPUXM_DATAWT) 583 p->p_md.md_flags &= ~MDP_CCBDATA; 584 if (ep->a_trsize & HPUXM_STKWT) 585 p->p_md.md_flags &= ~MDP_CCBSTACK; 586 } 587 #endif 588 #ifdef ULTRIXCOMPAT 589 /* 590 * Always start out as an ULTRIX process. 591 * A system call in crt0.o will change us to BSD system calls later. 592 */ 593 p->p_md.md_flags |= MDP_ULTRIX; 594 #endif 595 p->p_flag |= P_EXEC; 596 #ifndef COFF 597 addr = VM_MIN_ADDRESS; 598 if (vm_allocate(&vm->vm_map, &addr, xts + ctob(ds), FALSE)) { 599 uprintf("Cannot allocate text+data space\n"); 600 error = ENOMEM; /* XXX */ 601 goto badmap; 602 } 603 vm->vm_taddr = (caddr_t)VM_MIN_ADDRESS; 604 vm->vm_daddr = (caddr_t)(VM_MIN_ADDRESS + xts); 605 #else /* COFF */ 606 addr = (vm_offset_t)ep->ex_aout.codeStart; 607 vm->vm_taddr = (caddr_t)addr; 608 if (vm_allocate(&vm->vm_map, &addr, xts, FALSE)) { 609 uprintf("Cannot allocate text space\n"); 610 error = ENOMEM; /* XXX */ 611 goto badmap; 612 } 613 addr = (vm_offset_t)ep->ex_aout.heapStart; 614 vm->vm_daddr = (caddr_t)addr; 615 if (vm_allocate(&vm->vm_map, &addr, round_page(ctob(ds)), FALSE)) { 616 uprintf("Cannot allocate data space\n"); 617 error = ENOMEM; /* XXX */ 618 goto badmap; 619 } 620 #endif /* COFF */ 621 size = round_page(MAXSSIZ); /* XXX */ 622 #ifdef i386 623 addr = trunc_page(USRSTACK - size) - NBPG; /* XXX */ 624 #else 625 addr = trunc_page(USRSTACK - size); 626 #endif 627 if (vm_allocate(&vm->vm_map, &addr, size, FALSE)) { 628 uprintf("Cannot allocate stack space\n"); 629 error = ENOMEM; /* XXX */ 630 goto badmap; 631 } 632 size -= round_page(p->p_rlimit[RLIMIT_STACK].rlim_cur); 633 if (vm_map_protect(&vm->vm_map, addr, addr+size, VM_PROT_NONE, FALSE)) { 634 uprintf("Cannot protect stack space\n"); 635 error = ENOMEM; 636 goto badmap; 637 } 638 vm->vm_maxsaddr = (caddr_t)addr; 639 640 if (paged == 0) { 641 /* 642 * Read in data segment. 643 */ 644 (void) vn_rdwr(UIO_READ, vp, vm->vm_daddr, (int) ep->a_data, 645 (off_t)(toff + ep->a_text), UIO_USERSPACE, 646 (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p); 647 /* 648 * Read in text segment if necessary (0410), 649 * and read-protect it. 650 */ 651 if (ep->a_text > 0) { 652 error = vn_rdwr(UIO_READ, vp, vm->vm_taddr, 653 (int)ep->a_text, toff, UIO_USERSPACE, 654 (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p); 655 (void) vm_map_protect(&vm->vm_map, 656 (vm_offset_t)vm->vm_taddr, 657 (vm_offset_t)vm->vm_taddr + trunc_page(ep->a_text), 658 VM_PROT_READ|VM_PROT_EXECUTE, FALSE); 659 } 660 } else { 661 /* 662 * Allocate a region backed by the exec'ed vnode. 663 */ 664 #ifndef COFF 665 addr = VM_MIN_ADDRESS; 666 size = round_page(xts + ep->a_data); 667 error = vm_mmap(&vm->vm_map, &addr, size, 668 VM_PROT_ALL, VM_PROT_ALL, 669 MAP_COPY|MAP_FIXED, 670 (caddr_t)vp, (vm_offset_t)toff); 671 (void) vm_map_protect(&vm->vm_map, addr, addr + xts, 672 VM_PROT_READ|VM_PROT_EXECUTE, FALSE); 673 #else /* COFF */ 674 addr = (vm_offset_t)vm->vm_taddr; 675 size = xts; 676 error = vm_mmap(&vm->vm_map, &addr, size, 677 VM_PROT_READ|VM_PROT_EXECUTE, VM_PROT_ALL, 678 MAP_COPY|MAP_FIXED, 679 (caddr_t)vp, (vm_offset_t)toff); 680 toff += size; 681 addr = (vm_offset_t)vm->vm_daddr; 682 size = round_page(ep->a_data); 683 error = vm_mmap(&vm->vm_map, &addr, size, 684 VM_PROT_ALL, VM_PROT_ALL, 685 MAP_COPY|MAP_FIXED, 686 (caddr_t)vp, (vm_offset_t)toff); 687 #endif /* COFF */ 688 vp->v_flag |= VTEXT; 689 } 690 if (error) { 691 badmap: 692 killproc(p, "VM allocation in exec"); 693 p->p_flag |= P_NOSWAP; 694 return(error); 695 } 696 697 /* 698 * set SUID/SGID protections, if no tracing 699 */ 700 p->p_flag &= ~P_SUGID; 701 if ((p->p_flag & P_TRACED) == 0) { 702 if (uid != cred->cr_uid || gid != cred->cr_gid) { 703 p->p_ucred = cred = crcopy(cred); 704 /* 705 * If process is being ktraced, turn off - unless 706 * root set it. 707 */ 708 if (p->p_tracep && !(p->p_traceflag & KTRFAC_ROOT)) { 709 vrele(p->p_tracep); 710 p->p_tracep = NULL; 711 p->p_traceflag = 0; 712 } 713 cred->cr_uid = uid; 714 cred->cr_gid = gid; 715 p->p_flag |= P_SUGID; 716 } 717 } else 718 psignal(p, SIGTRAP); 719 p->p_cred->p_svuid = cred->cr_uid; 720 p->p_cred->p_svgid = cred->cr_gid; 721 vm->vm_tsize = btoc(xts); 722 vm->vm_dsize = ds; 723 vm->vm_ssize = btoc(ssize); 724 if (p->p_flag & P_PROFIL) 725 stopprofclock(p); 726 #if defined(tahoe) 727 /* move this when tahoe cpu_exec is created */ 728 p->p_addr->u_pcb.pcb_savacc.faddr = (float *)NULL; 729 #endif 730 return (0); 731 } 732