1 /*- 2 * Copyright (c) 1982, 1986, 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 * 7 * @(#)kern_exec.c 7.71 (Berkeley) 02/13/93 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 #include <sys/kinfo_proc.h> 37 38 #ifdef HPUXCOMPAT 39 #include <sys/user.h> /* for pcb */ 40 #include <hp/hpux/hpux_exec.h> 41 #endif 42 43 #ifdef COPY_SIGCODE 44 extern char sigcode[], esigcode[]; 45 #define szsigcode (esigcode - sigcode) 46 #else 47 #define szsigcode 0 48 #endif 49 50 /* 51 * exec system call 52 */ 53 struct execve_args { 54 char *fname; 55 char **argp; 56 char **envp; 57 }; 58 /* ARGSUSED */ 59 execve(p, uap, retval) 60 register struct proc *p; 61 register struct execve_args *uap; 62 int *retval; 63 { 64 register struct ucred *cred = p->p_ucred; 65 register struct filedesc *fdp = p->p_fd; 66 int na, ne, ucp, ap, cc, ssize; 67 register char *cp; 68 register int nc; 69 unsigned len; 70 int indir, uid, gid; 71 char *sharg; 72 struct vnode *vp; 73 int resid, error, paged = 0; 74 vm_offset_t execargs = 0; 75 struct vattr vattr; 76 char cfarg[MAXINTERP]; 77 union { 78 char ex_shell[MAXINTERP]; /* #! and interpreter name */ 79 struct exec ex_exec; 80 #ifdef HPUXCOMPAT 81 struct hpux_exec ex_hexec; 82 #endif 83 } exdata; 84 #ifdef HPUXCOMPAT 85 struct hpux_exec hhead; 86 #endif 87 struct nameidata nd; 88 struct ps_strings ps; 89 90 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF | SAVENAME, UIO_USERSPACE, 91 uap->fname, p); 92 if (error = namei(&nd)) 93 return (error); 94 vp = nd.ni_vp; 95 indir = 0; 96 uid = cred->cr_uid; 97 gid = cred->cr_gid; 98 if (error = VOP_GETATTR(vp, &vattr, cred, p)) 99 goto bad; 100 if (vp->v_mount->mnt_flag & MNT_NOEXEC) { 101 error = EACCES; 102 goto bad; 103 } 104 if ((vp->v_mount->mnt_flag & MNT_NOSUID) == 0) { 105 if (vattr.va_mode & VSUID) 106 uid = vattr.va_uid; 107 if (vattr.va_mode & VSGID) 108 gid = vattr.va_gid; 109 } 110 111 again: 112 if (error = VOP_ACCESS(vp, VEXEC, cred, p)) 113 goto bad; 114 if ((p->p_flag & STRC) && (error = VOP_ACCESS(vp, VREAD, cred, p))) 115 goto bad; 116 if (vp->v_type != VREG || 117 (vattr.va_mode & (VEXEC|(VEXEC>>3)|(VEXEC>>6))) == 0) { 118 error = EACCES; 119 goto bad; 120 } 121 122 /* 123 * Read in first few bytes of file for segment sizes, magic number: 124 * OMAGIC = plain executable 125 * NMAGIC = RO text 126 * ZMAGIC = demand paged RO text 127 * Also an ASCII line beginning with #! is 128 * the file name of a ``shell'' and arguments may be prepended 129 * to the argument list if given here. 130 * 131 * SHELL NAMES ARE LIMITED IN LENGTH. 132 * 133 * ONLY ONE ARGUMENT MAY BE PASSED TO THE SHELL FROM 134 * THE ASCII LINE. 135 */ 136 exdata.ex_shell[0] = '\0'; /* for zero length files */ 137 error = vn_rdwr(UIO_READ, vp, (caddr_t)&exdata, sizeof (exdata), 138 (off_t)0, UIO_SYSSPACE, (IO_UNIT|IO_NODELOCKED), cred, &resid, 139 (struct proc *)0); 140 if (error) 141 goto bad; 142 #ifndef lint 143 if (resid > sizeof(exdata) - sizeof(exdata.ex_exec) && 144 exdata.ex_shell[0] != '#') { 145 error = ENOEXEC; 146 goto bad; 147 } 148 #endif 149 #if defined(hp300) || defined(luna68k) 150 switch ((int)exdata.ex_exec.a_mid) { 151 152 /* 153 * An ancient hp200 or hp300 binary, shouldn't happen anymore. 154 * Mark as invalid. 155 */ 156 case MID_ZERO: 157 exdata.ex_exec.a_magic = 0; 158 break; 159 160 /* 161 * HP200 series has a smaller page size so we cannot 162 * demand-load or even write protect text, so we just 163 * treat as OMAGIC. 164 */ 165 case MID_HP200: 166 exdata.ex_exec.a_magic = OMAGIC; 167 break; 168 169 case MID_HP300: 170 break; 171 172 #ifdef HPUXCOMPAT 173 case MID_HPUX: 174 /* 175 * Save a.out header. This is eventually saved in the pcb, 176 * but we cannot do that yet in case the exec fails before 177 * the image is overlayed. 178 */ 179 bcopy((caddr_t)&exdata.ex_hexec, 180 (caddr_t)&hhead, sizeof hhead); 181 /* 182 * Shuffle important fields to their BSD locations. 183 * Note that the order in which this is done is important. 184 */ 185 exdata.ex_exec.a_text = exdata.ex_hexec.ha_text; 186 exdata.ex_exec.a_data = exdata.ex_hexec.ha_data; 187 exdata.ex_exec.a_bss = exdata.ex_hexec.ha_bss; 188 exdata.ex_exec.a_entry = exdata.ex_hexec.ha_entry; 189 /* 190 * For ZMAGIC files, make sizes consistant with those 191 * generated by BSD ld. 192 */ 193 if (exdata.ex_exec.a_magic == ZMAGIC) { 194 exdata.ex_exec.a_text = 195 ctob(btoc(exdata.ex_exec.a_text)); 196 nc = exdata.ex_exec.a_data + exdata.ex_exec.a_bss; 197 exdata.ex_exec.a_data = 198 ctob(btoc(exdata.ex_exec.a_data)); 199 nc -= (int)exdata.ex_exec.a_data; 200 exdata.ex_exec.a_bss = (nc < 0) ? 0 : nc; 201 } 202 break; 203 #endif 204 } 205 #endif 206 switch ((int)exdata.ex_exec.a_magic) { 207 208 case OMAGIC: 209 #ifdef COFF 210 if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) { 211 error = ENOEXEC; 212 goto bad; 213 } 214 #endif 215 #ifdef sparc 216 if (exdata.ex_exec.a_mid != MID_SUN_SPARC) { 217 error = ENOEXEC; 218 goto bad; 219 } 220 #endif 221 exdata.ex_exec.a_data += exdata.ex_exec.a_text; 222 exdata.ex_exec.a_text = 0; 223 break; 224 225 case ZMAGIC: 226 paged = 1; 227 /* FALLTHROUGH */ 228 229 case NMAGIC: 230 #ifdef COFF 231 if (exdata.ex_exec.ex_fhdr.magic != COFF_MAGIC) { 232 error = ENOEXEC; 233 goto bad; 234 } 235 #endif 236 #ifdef sparc 237 if (exdata.ex_exec.a_mid != MID_SUN_SPARC) { 238 error = ENOEXEC; 239 goto bad; 240 } 241 #endif 242 if (exdata.ex_exec.a_text == 0) { 243 error = ENOEXEC; 244 goto bad; 245 } 246 break; 247 248 default: 249 if (exdata.ex_shell[0] != '#' || 250 exdata.ex_shell[1] != '!' || 251 indir) { 252 error = ENOEXEC; 253 goto bad; 254 } 255 for (cp = &exdata.ex_shell[2];; ++cp) { 256 if (cp >= &exdata.ex_shell[MAXINTERP]) { 257 error = ENOEXEC; 258 goto bad; 259 } 260 if (*cp == '\n') { 261 *cp = '\0'; 262 break; 263 } 264 if (*cp == '\t') 265 *cp = ' '; 266 } 267 cp = &exdata.ex_shell[2]; 268 while (*cp == ' ') 269 cp++; 270 nd.ni_dirp = cp; 271 while (*cp && *cp != ' ') 272 cp++; 273 cfarg[0] = '\0'; 274 if (*cp) { 275 *cp++ = '\0'; 276 while (*cp == ' ') 277 cp++; 278 if (*cp) 279 bcopy((caddr_t)cp, (caddr_t)cfarg, MAXINTERP); 280 } 281 indir = 1; 282 vput(vp); 283 nd.ni_segflg = UIO_SYSSPACE; 284 if (error = namei(&nd)) 285 return (error); 286 vp = nd.ni_vp; 287 if (error = VOP_GETATTR(vp, &vattr, cred, p)) 288 goto bad; 289 uid = cred->cr_uid; /* shell scripts can't be setuid */ 290 gid = cred->cr_gid; 291 goto again; 292 } 293 294 /* 295 * Collect arguments on "file" in swap space. 296 */ 297 na = 0; 298 ne = 0; 299 nc = 0; 300 cc = NCARGS; 301 execargs = kmem_alloc_wait(exec_map, NCARGS); 302 #ifdef DIAGNOSTIC 303 if (execargs == (vm_offset_t)0) 304 panic("execve: kmem_alloc_wait"); 305 #endif 306 cp = (char *) execargs; 307 /* 308 * Copy arguments into file in argdev area. 309 */ 310 if (uap->argp) for (;;) { 311 ap = NULL; 312 sharg = NULL; 313 if (indir && na == 0) { 314 sharg = nd.ni_cnd.cn_nameptr; 315 ap = (int)sharg; 316 uap->argp++; /* ignore argv[0] */ 317 } else if (indir && (na == 1 && cfarg[0])) { 318 sharg = cfarg; 319 ap = (int)sharg; 320 } else if (indir && (na == 1 || na == 2 && cfarg[0])) 321 ap = (int)uap->fname; 322 else if (uap->argp) { 323 ap = fuword((caddr_t)uap->argp); 324 uap->argp++; 325 } 326 if (ap == NULL && uap->envp) { 327 uap->argp = NULL; 328 if ((ap = fuword((caddr_t)uap->envp)) != NULL) 329 uap->envp++, ne++; 330 } 331 if (ap == NULL) 332 break; 333 na++; 334 if (ap == -1) { 335 error = EFAULT; 336 goto bad; 337 } 338 do { 339 if (nc >= NCARGS-1) { 340 error = E2BIG; 341 break; 342 } 343 if (sharg) { 344 error = copystr(sharg, cp, (unsigned)cc, &len); 345 sharg += len; 346 } else { 347 error = copyinstr((caddr_t)ap, cp, (unsigned)cc, 348 &len); 349 ap += len; 350 } 351 cp += len; 352 nc += len; 353 cc -= len; 354 } while (error == ENAMETOOLONG); 355 if (error) 356 goto bad; 357 } 358 359 /* 360 * XXX the following is excessively bogus 361 * 362 * Compute initial process stack size and location of argc 363 * and character strings. `nc' is currently just the number 364 * of characters of arg and env strings. 365 * 366 * nc = size of ps_strings structure + 367 * size of signal code + 368 * 4 bytes of NULL pointer + 369 * nc, 370 * rounded to nearest integer; 371 * ucp = USRSTACK - nc; [user characters pointer] 372 * apsize = padding (if any) + 373 * 4 bytes of NULL pointer + 374 * ne 4-byte pointers to env strings + 375 * 4 bytes of NULL pointer + 376 * (na-ne) 4-byte pointers to arg strings + 377 * 4 bytes of argc; 378 * (this is the same as nc + (na+3)*4) 379 * ap = ucp - apsize; [user address of argc] 380 * ssize = ssize + nc + machine-dependent space; 381 */ 382 nc = (sizeof(ps) + szsigcode + 4 + nc + NBPW-1) & ~(NBPW - 1); 383 #if defined(sparc) || defined(mips) 384 ucp = USRSTACK; 385 ssize = ALIGN(nc + (na + 3) * NBPW); 386 ap = ucp - ssize; 387 ucp -= nc; 388 #ifdef sparc 389 ssize += sizeof(struct rwindow); 390 #endif 391 #else 392 ssize = (na + 3) * NBPW; 393 ucp = USRSTACK - nc; 394 ap = ucp - ssize; 395 ssize += nc; 396 #endif 397 error = getxfile(p, vp, &exdata.ex_exec, paged, ssize, uid, gid); 398 if (error) 399 goto bad; 400 vput(vp); 401 vp = NULL; 402 403 #ifdef HPUXCOMPAT 404 /* 405 * We are now committed to the exec so we can save the exec 406 * header in the pcb where we can dump it if necessary in core() 407 */ 408 if (p->p_md.md_flags & MDP_HPUX) 409 bcopy((caddr_t)&hhead, 410 (caddr_t)p->p_addr->u_md.md_exec, sizeof hhead); 411 #endif 412 413 /* 414 * Copy back arglist. 415 */ 416 cpu_setstack(p, ap); 417 (void) suword((caddr_t)ap, na-ne); 418 nc = 0; 419 cp = (char *) execargs; 420 cc = NCARGS; 421 ps.ps_argvstr = (char *)ucp; /* first argv string */ 422 ps.ps_nargvstr = na - ne; /* argc */ 423 for (;;) { 424 ap += NBPW; 425 if (na == ne) { 426 (void) suword((caddr_t)ap, 0); 427 ap += NBPW; 428 ps.ps_envstr = (char *)ucp; 429 ps.ps_nenvstr = ne; 430 } 431 if (--na < 0) 432 break; 433 (void) suword((caddr_t)ap, ucp); 434 do { 435 error = copyoutstr(cp, (caddr_t)ucp, (unsigned)cc, 436 &len); 437 ucp += len; 438 cp += len; 439 nc += len; 440 cc -= len; 441 } while (error == ENAMETOOLONG); 442 if (error == EFAULT) 443 panic("exec: EFAULT"); 444 } 445 (void) suword((caddr_t)ap, 0); 446 (void) copyout((caddr_t)&ps, (caddr_t)PS_STRINGS, sizeof(ps)); 447 448 execsigs(p); 449 450 for (nc = fdp->fd_lastfile; nc >= 0; --nc) { 451 if (fdp->fd_ofileflags[nc] & UF_EXCLOSE) { 452 (void) closef(fdp->fd_ofiles[nc], p); 453 fdp->fd_ofiles[nc] = NULL; 454 fdp->fd_ofileflags[nc] = 0; 455 if (nc < fdp->fd_freefile) 456 fdp->fd_freefile = nc; 457 } 458 fdp->fd_ofileflags[nc] &= ~UF_MAPPED; 459 } 460 /* 461 * Adjust fd_lastfile to account for descriptors closed above. 462 * Don't decrement fd_lastfile past 0, as it's unsigned. 463 */ 464 while (fdp->fd_lastfile > 0 && fdp->fd_ofiles[fdp->fd_lastfile] == NULL) 465 fdp->fd_lastfile--; 466 setregs(p, exdata.ex_exec.a_entry, retval); 467 #ifdef COPY_SIGCODE 468 /* 469 * Install sigcode at top of user stack. 470 */ 471 copyout((caddr_t)sigcode, (caddr_t)PS_STRINGS - szsigcode, szsigcode); 472 #endif 473 /* 474 * Remember file name for accounting. 475 */ 476 p->p_acflag &= ~AFORK; 477 if (nd.ni_cnd.cn_namelen > MAXCOMLEN) 478 nd.ni_cnd.cn_namelen = MAXCOMLEN; 479 bcopy((caddr_t)nd.ni_cnd.cn_nameptr, (caddr_t)p->p_comm, 480 (unsigned)nd.ni_cnd.cn_namelen); 481 p->p_comm[nd.ni_cnd.cn_namelen] = '\0'; 482 cpu_exec(p); 483 bad: 484 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 485 if (execargs) 486 kmem_free_wakeup(exec_map, execargs, NCARGS); 487 if (vp) 488 vput(vp); 489 return (error); 490 } 491 492 /* 493 * Read in and set up memory for executed file. 494 */ 495 getxfile(p, vp, ep, paged, ssize, uid, gid) 496 register struct proc *p; 497 register struct vnode *vp; 498 register struct exec *ep; 499 int paged, ssize, uid, gid; 500 { 501 register struct ucred *cred = p->p_ucred; 502 register struct vmspace *vm = p->p_vmspace; 503 vm_offset_t addr; 504 vm_size_t xts, size; 505 segsz_t ds; 506 off_t toff; 507 int error = 0; 508 509 #ifdef HPUXCOMPAT 510 if (ep->a_mid == MID_HPUX) 511 toff = paged ? CLBYTES : sizeof(struct hpux_exec); 512 else 513 #endif 514 #ifdef COFF 515 toff = N_TXTOFF(*ep); 516 #else 517 #ifdef sparc 518 if (ep->a_mid == MID_SUN_SPARC) 519 toff = paged ? 0 : sizeof(struct exec); 520 else 521 #endif 522 if (paged) 523 #ifdef mips 524 toff = 0; 525 #else 526 toff = CLBYTES; 527 #endif 528 else 529 toff = sizeof (struct exec); 530 #endif 531 if (ep->a_text != 0 && (vp->v_flag & VTEXT) == 0 && 532 vp->v_writecount != 0) 533 return (ETXTBSY); 534 535 /* 536 * Compute text and data sizes and make sure not too large. 537 * Text size is rounded to an ``ld page''; data+bss is left 538 * in machine pages. Check data and bss separately as they 539 * may overflow when summed together. (XXX not done yet) 540 */ 541 xts = roundup(ep->a_text, __LDPGSZ); 542 ds = clrnd(btoc(ep->a_data + ep->a_bss)); 543 544 /* 545 * If we're sharing the address space, allocate a new space 546 * and release our reference to the old one. Otherwise, 547 * empty out the existing vmspace. 548 */ 549 #ifdef sparc 550 kill_user_windows(p); /* before addrs go away */ 551 #endif 552 if (vm->vm_refcnt > 1) { 553 p->p_vmspace = vmspace_alloc(VM_MIN_ADDRESS, 554 VM_MAXUSER_ADDRESS, 1); 555 vmspace_free(vm); 556 vm = p->p_vmspace; 557 } else { 558 #ifdef SYSVSHM 559 if (vm->vm_shm) 560 shmexit(p); 561 #endif 562 (void) vm_map_remove(&vm->vm_map, VM_MIN_ADDRESS, 563 VM_MAXUSER_ADDRESS); 564 } 565 /* 566 * If parent is waiting for us to exec or exit, 567 * SPPWAIT will be set; clear it and wakeup parent. 568 */ 569 if (p->p_flag & SPPWAIT) { 570 p->p_flag &= ~SPPWAIT; 571 wakeup((caddr_t) p->p_pptr); 572 } 573 #if defined(HP380) 574 /* default to copyback caching on 68040 */ 575 if (mmutype == MMU_68040) 576 p->p_md.md_flags |= (MDP_CCBDATA|MDP_CCBSTACK); 577 #endif 578 #ifdef HPUXCOMPAT 579 p->p_md.md_flags &= ~(MDP_HPUX|MDP_HPUXMMAP); 580 /* note that we are an HP-UX binary */ 581 if (ep->a_mid == MID_HPUX) 582 p->p_md.md_flags |= MDP_HPUX; 583 /* deal with miscellaneous attributes */ 584 if (ep->a_trsize & HPUXM_VALID) { 585 if (ep->a_trsize & HPUXM_DATAWT) 586 p->p_md.md_flags &= ~MDP_CCBDATA; 587 if (ep->a_trsize & HPUXM_STKWT) 588 p->p_md.md_flags &= ~MDP_CCBSTACK; 589 } 590 #endif 591 #ifdef ULTRIXCOMPAT 592 /* 593 * Always start out as an ULTRIX process. 594 * A system call in crt0.o will change us to BSD system calls later. 595 */ 596 p->p_md.md_flags |= MDP_ULTRIX; 597 #endif 598 p->p_flag |= SEXEC; 599 #ifndef COFF 600 addr = VM_MIN_ADDRESS; 601 if (vm_allocate(&vm->vm_map, &addr, xts + ctob(ds), FALSE)) { 602 uprintf("Cannot allocate text+data space\n"); 603 error = ENOMEM; /* XXX */ 604 goto badmap; 605 } 606 vm->vm_taddr = (caddr_t)VM_MIN_ADDRESS; 607 vm->vm_daddr = (caddr_t)(VM_MIN_ADDRESS + xts); 608 #else /* COFF */ 609 addr = (vm_offset_t)ep->ex_aout.codeStart; 610 vm->vm_taddr = (caddr_t)addr; 611 if (vm_allocate(&vm->vm_map, &addr, xts, FALSE)) { 612 uprintf("Cannot allocate text space\n"); 613 error = ENOMEM; /* XXX */ 614 goto badmap; 615 } 616 addr = (vm_offset_t)ep->ex_aout.heapStart; 617 vm->vm_daddr = (caddr_t)addr; 618 if (vm_allocate(&vm->vm_map, &addr, round_page(ctob(ds)), FALSE)) { 619 uprintf("Cannot allocate data space\n"); 620 error = ENOMEM; /* XXX */ 621 goto badmap; 622 } 623 #endif /* COFF */ 624 size = round_page(MAXSSIZ); /* XXX */ 625 #ifdef i386 626 addr = trunc_page(USRSTACK - size) - NBPG; /* XXX */ 627 #else 628 addr = trunc_page(USRSTACK - size); 629 #endif 630 if (vm_allocate(&vm->vm_map, &addr, size, FALSE)) { 631 uprintf("Cannot allocate stack space\n"); 632 error = ENOMEM; /* XXX */ 633 goto badmap; 634 } 635 size -= round_page(p->p_rlimit[RLIMIT_STACK].rlim_cur); 636 if (vm_map_protect(&vm->vm_map, addr, addr+size, VM_PROT_NONE, FALSE)) { 637 uprintf("Cannot protect stack space\n"); 638 error = ENOMEM; 639 goto badmap; 640 } 641 vm->vm_maxsaddr = (caddr_t)addr; 642 643 if (paged == 0) { 644 /* 645 * Read in data segment. 646 */ 647 (void) vn_rdwr(UIO_READ, vp, vm->vm_daddr, (int) ep->a_data, 648 (off_t)(toff + ep->a_text), UIO_USERSPACE, 649 (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p); 650 /* 651 * Read in text segment if necessary (0410), 652 * and read-protect it. 653 */ 654 if (ep->a_text > 0) { 655 error = vn_rdwr(UIO_READ, vp, vm->vm_taddr, 656 (int)ep->a_text, toff, UIO_USERSPACE, 657 (IO_UNIT|IO_NODELOCKED), cred, (int *)0, p); 658 (void) vm_map_protect(&vm->vm_map, 659 (vm_offset_t)vm->vm_taddr, 660 (vm_offset_t)vm->vm_taddr + trunc_page(ep->a_text), 661 VM_PROT_READ|VM_PROT_EXECUTE, FALSE); 662 } 663 } else { 664 /* 665 * Allocate a region backed by the exec'ed vnode. 666 */ 667 #ifndef COFF 668 addr = VM_MIN_ADDRESS; 669 size = round_page(xts + ep->a_data); 670 error = vm_mmap(&vm->vm_map, &addr, size, VM_PROT_ALL, 671 MAP_COPY|MAP_FIXED, 672 (caddr_t)vp, (vm_offset_t)toff); 673 (void) vm_map_protect(&vm->vm_map, addr, addr + xts, 674 VM_PROT_READ|VM_PROT_EXECUTE, FALSE); 675 #else /* COFF */ 676 addr = (vm_offset_t)vm->vm_taddr; 677 size = xts; 678 error = vm_mmap(&vm->vm_map, &addr, size, 679 VM_PROT_READ|VM_PROT_EXECUTE, 680 MAP_COPY|MAP_FIXED, 681 (caddr_t)vp, (vm_offset_t)toff); 682 toff += size; 683 addr = (vm_offset_t)vm->vm_daddr; 684 size = round_page(ep->a_data); 685 error = vm_mmap(&vm->vm_map, &addr, size, VM_PROT_ALL, 686 MAP_COPY|MAP_FIXED, 687 (caddr_t)vp, (vm_offset_t)toff); 688 #endif /* COFF */ 689 vp->v_flag |= VTEXT; 690 } 691 if (error) { 692 badmap: 693 killproc(p, "VM allocation in exec"); 694 p->p_flag |= SKEEP; 695 return(error); 696 } 697 698 /* 699 * set SUID/SGID protections, if no tracing 700 */ 701 p->p_flag &= ~SUGID; 702 if ((p->p_flag & STRC) == 0) { 703 if (uid != cred->cr_uid || gid != cred->cr_gid) { 704 p->p_ucred = cred = crcopy(cred); 705 /* 706 * If process is being ktraced, turn off - unless 707 * root set it. 708 */ 709 if (p->p_tracep && !(p->p_traceflag & KTRFAC_ROOT)) { 710 vrele(p->p_tracep); 711 p->p_tracep = NULL; 712 p->p_traceflag = 0; 713 } 714 cred->cr_uid = uid; 715 cred->cr_gid = gid; 716 p->p_flag |= SUGID; 717 } 718 } else 719 psignal(p, SIGTRAP); 720 p->p_cred->p_svuid = cred->cr_uid; 721 p->p_cred->p_svgid = cred->cr_gid; 722 vm->vm_tsize = btoc(xts); 723 vm->vm_dsize = ds; 724 vm->vm_ssize = btoc(ssize); 725 if (p->p_flag & SPROFIL) 726 stopprofclock(p); 727 #if defined(tahoe) 728 /* move this when tahoe cpu_exec is created */ 729 p->p_addr->u_pcb.pcb_savacc.faddr = (float *)NULL; 730 #endif 731 return (0); 732 } 733