Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/compat/pecoff/imgact_pecoff.c
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1 /*- 2 * Copyright (c) 2000 Masaru OKI 3 * Copyright (c) 1994, 1995, 1998 Scott Bartram 4 * Copyright (c) 1994 Adam Glass 5 * Copyright (c) 1993, 1994 Christopher G. Demetriou 6 * 7 * originally from NetBSD kern/exec_ecoff.c 8 * 9 * Copyright (c) 2000 Takanori Watanabe 10 * Copyright (c) 2000 KUROSAWA Takahiro 11 * Copyright (c) 1995-1996 Sen Schmidt 12 * Copyright (c) 1996 Peter Wemm 13 * All rights reserved. 14 * 15 * originally from FreeBSD kern/imgact_elf.c 16 * 17 * Redistribution and use in source and binary forms, with or without 18 * modification, are permitted provided that the following conditions 19 * are met: 20 * 1. Redistributions of source code must retain the above copyright 21 * notice, this list of conditions and the following disclaimer. 22 * 2. Redistributions in binary form must reproduce the above copyright 23 * notice, this list of conditions and the following disclaimer in the 24 * documentation and/or other materials provided with the distribution. 25 * 3. All advertising materials mentioning features or use of this software 26 * must display the following acknowledgement: 27 * This product includes software developed by Masaru OKI. 28 * 4. The name of the author may not be used to endorse or promote products 29 * derived from this software without specific prior written permission 30 * 31 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 32 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 33 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 34 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 35 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 36 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 37 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 38 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 39 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 40 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 41 */ 42 43 #include <sys/cdefs.h> 44 __FBSDID("$FreeBSD: releng/6.0/sys/compat/pecoff/imgact_pecoff.c 142196 2005-02-22 01:26:48Z sam $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/imgact.h> 49 #include <sys/lock.h> 50 #include <sys/malloc.h> 51 #include <sys/mman.h> 52 #include <sys/mutex.h> 53 #include <sys/namei.h> 54 #include <sys/proc.h> 55 #include <sys/signalvar.h> 56 #include <sys/sysent.h> 57 #include <sys/vnode.h> 58 59 #include <machine/reg.h> 60 61 #include <vm/vm.h> 62 #include <vm/vm_kern.h> 63 #include <vm/vm_param.h> 64 #include <vm/pmap.h> 65 #include <vm/vm_map.h> 66 #include <vm/vm_object.h> 67 #include <vm/vm_extern.h> 68 69 #include <sys/exec.h> 70 #include <sys/kernel.h> 71 #include <sys/module.h> 72 #include <machine/cpu.h> 73 #include <sys/syscall.h> 74 #include <sys/sysent.h> 75 #include <machine/md_var.h> 76 #include <machine/pecoff_machdep.h> 77 #include <compat/pecoff/imgact_pecoff.h> 78 79 #include "opt_pecoff.h" 80 81 #define PECOFF_PE_SIGNATURE "PE\0\0" 82 static int pecoff_fixup(register_t **, struct image_params *); 83 #ifndef PECOFF_DEBUG 84 #define DPRINTF(a) 85 #else 86 #define DPRINTF(a) printf a 87 #endif 88 static struct sysentvec pecoff_sysvec = { 89 SYS_MAXSYSCALL, 90 sysent, 91 0, 92 0, 93 NULL, 94 0, 95 NULL, 96 NULL, 97 pecoff_fixup, 98 sendsig, 99 sigcode, 100 &szsigcode, 101 0, 102 "FreeBSD PECoff", 103 NULL, 104 NULL, 105 MINSIGSTKSZ, 106 PAGE_SIZE, 107 VM_MIN_ADDRESS, 108 VM_MAXUSER_ADDRESS, 109 USRSTACK, 110 PS_STRINGS, 111 VM_PROT_ALL, 112 exec_copyout_strings, 113 exec_setregs, 114 NULL 115 116 }; 117 118 static const char signature[] = PECOFF_PE_SIGNATURE; 119 120 static int 121 exec_pecoff_coff_prep_omagic(struct image_params *, 122 struct coff_filehdr *, 123 struct coff_aouthdr *, int peoffs); 124 static int 125 exec_pecoff_coff_prep_nmagic(struct image_params *, 126 struct coff_filehdr *, 127 struct coff_aouthdr *, int peoffs); 128 static int 129 exec_pecoff_coff_prep_zmagic(struct image_params *, 130 struct coff_filehdr *, 131 struct coff_aouthdr *, int peoffs); 132 133 static int 134 exec_pecoff_coff_makecmds(struct image_params *, 135 struct coff_filehdr *, int); 136 137 static int pecoff_signature(struct thread *, struct vnode *, const struct pecoff_dos_filehdr *); 138 static int pecoff_read_from(struct thread *, struct vnode *, int, caddr_t, int); 139 static int 140 pecoff_load_section(struct thread * td, 141 struct vmspace * vmspace, struct vnode * vp, 142 vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, 143 vm_prot_t prot); 144 145 static int 146 pecoff_fixup(register_t ** stack_base, struct image_params * imgp) 147 { 148 int len = sizeof(struct pecoff_args); 149 struct pecoff_imghdr *ap; 150 register_t *pos; 151 152 pos = *stack_base + (imgp->args->argc + imgp->args->envc + 2); 153 ap = (struct pecoff_imghdr *) imgp->auxargs; 154 if (copyout(ap, pos, len)) { 155 return 0; 156 } 157 free(ap, M_TEMP); 158 imgp->auxargs = NULL; 159 (*stack_base)--; 160 suword(*stack_base, (long) imgp->args->argc); 161 return 0; 162 } 163 164 static int 165 pecoff_load_section(struct thread * td, struct vmspace * vmspace, struct vnode * vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot) 166 { 167 size_t map_len; 168 vm_offset_t map_addr; 169 int error, rv; 170 size_t copy_len; 171 size_t copy_map_len; 172 size_t copy_start; 173 vm_object_t object; 174 vm_offset_t copy_map_offset; 175 vm_offset_t file_addr; 176 vm_offset_t data_buf = 0; 177 178 object = vp->v_object; 179 error = 0; 180 181 map_addr = trunc_page((vm_offset_t) vmaddr); 182 file_addr = trunc_page(offset); 183 DPRINTF(("SECARG:%x %p %x %x\n", offset, vmaddr, memsz, filsz)); 184 if (file_addr != offset) { 185 /* 186 * The section is not on page boundary. We can't use 187 * vm_map_insert(). Use copyin instead. 188 */ 189 map_len = round_page(memsz); 190 copy_len = filsz; 191 copy_map_offset = file_addr; 192 copy_map_len = round_page(offset + filsz) - file_addr; 193 copy_start = offset - file_addr; 194 195 DPRINTF(("offset=%x vmaddr=%lx filsz=%x memsz=%x\n", 196 offset, (long)vmaddr, filsz, memsz)); 197 DPRINTF(("map_len=%x copy_len=%x copy_map_offset=%x" 198 " copy_map_len=%x copy_start=%x\n", 199 map_len, copy_len, copy_map_offset, 200 copy_map_len, copy_start)); 201 } else { 202 203 map_len = trunc_page(filsz); 204 205 if (map_len != 0) { 206 vm_object_reference(object); 207 vm_map_lock(&vmspace->vm_map); 208 rv = vm_map_insert(&vmspace->vm_map, 209 object, 210 file_addr, /* file offset */ 211 map_addr, /* virtual start */ 212 map_addr + map_len, /* virtual end */ 213 prot, 214 VM_PROT_ALL, 215 MAP_COPY_ON_WRITE | MAP_PREFAULT); 216 217 vm_map_unlock(&vmspace->vm_map); 218 if (rv != KERN_SUCCESS) { 219 vm_object_deallocate(object); 220 return EINVAL; 221 } 222 /* we can stop now if we've covered it all */ 223 if (memsz == filsz) 224 return 0; 225 226 } 227 copy_map_offset = trunc_page(offset + filsz); 228 copy_map_len = PAGE_SIZE; 229 copy_start = 0; 230 copy_len = (offset + filsz) - trunc_page(offset + filsz); 231 map_addr = trunc_page((vm_offset_t) vmaddr + filsz); 232 map_len = round_page((vm_offset_t) vmaddr + memsz) - map_addr; 233 234 } 235 236 if (map_len != 0) { 237 vm_map_lock(&vmspace->vm_map); 238 rv = vm_map_insert(&vmspace->vm_map, NULL, 0, 239 map_addr, map_addr + map_len, 240 VM_PROT_ALL, VM_PROT_ALL, 0); 241 vm_map_unlock(&vmspace->vm_map); 242 DPRINTF(("EMP-rv:%d,%x %x\n", rv, map_addr, map_addr + map_len)); 243 if (rv != KERN_SUCCESS) { 244 return EINVAL; 245 } 246 } 247 DPRINTF(("COPYARG %x %x\n", map_addr, copy_len)); 248 if (copy_len != 0) { 249 vm_object_reference(object); 250 rv = vm_map_find(exec_map, 251 object, 252 copy_map_offset, 253 &data_buf, 254 copy_map_len, 255 TRUE, 256 VM_PROT_READ, 257 VM_PROT_ALL, 258 MAP_COPY_ON_WRITE | MAP_PREFAULT_PARTIAL); 259 if (rv != KERN_SUCCESS) { 260 vm_object_deallocate(object); 261 return EINVAL; 262 } 263 /* send the page fragment to user space */ 264 265 error = copyout((caddr_t) data_buf + copy_start, 266 (caddr_t) map_addr, copy_len); 267 vm_map_remove(exec_map, data_buf, data_buf + copy_map_len); 268 DPRINTF(("%d\n", error)); 269 if (error) 270 return (error); 271 } 272 /* 273 * set it to the specified protection 274 */ 275 vm_map_protect(&vmspace->vm_map, map_addr, 276 map_addr + map_len, prot, 277 FALSE); 278 return error; 279 280 } 281 static int 282 pecoff_load_file(struct thread * td, const char *file, u_long * addr, u_long * entry, u_long * ldexport) 283 { 284 285 struct nameidata nd; 286 struct pecoff_dos_filehdr dh; 287 struct coff_filehdr *fp = 0; 288 struct coff_aouthdr *ap; 289 struct pecoff_opthdr *wp; 290 struct coff_scnhdr *sh = 0; 291 struct vmspace *vmspace = td->td_proc->p_vmspace; 292 struct vattr attr; 293 struct image_params image_params, *imgp; 294 int peofs; 295 int error, i, scnsiz; 296 297 imgp = &image_params; 298 /* 299 * Initialize part of the common data 300 */ 301 imgp->proc = td->td_proc; 302 imgp->execlabel = NULL; 303 imgp->attr = &attr; 304 imgp->firstpage = NULL; 305 306 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW, UIO_SYSSPACE, file, td); 307 308 if ((error = namei(&nd)) != 0) { 309 nd.ni_vp = NULL; 310 goto fail; 311 } 312 NDFREE(&nd, NDF_ONLY_PNBUF); 313 imgp->vp = nd.ni_vp; 314 315 /* 316 * Check permissions, modes, uid, etc on the file, and "open" it. 317 */ 318 error = exec_check_permissions(imgp); 319 VOP_UNLOCK(nd.ni_vp, 0, td); 320 if (error) 321 goto fail; 322 if ((error = pecoff_read_from(td, imgp->vp, 0, (caddr_t) & dh, sizeof(dh))) != 0) 323 goto fail; 324 if ((error = pecoff_signature(td, imgp->vp, &dh) != 0)) 325 goto fail; 326 fp = malloc(PECOFF_HDR_SIZE, M_TEMP, M_WAITOK); 327 peofs = dh.d_peofs + sizeof(signature) - 1; 328 if ((error = pecoff_read_from(td, imgp->vp, peofs, (caddr_t) fp, PECOFF_HDR_SIZE) != 0)) 329 goto fail; 330 if (COFF_BADMAG(fp)) { 331 error = ENOEXEC; 332 goto fail; 333 } 334 ap = (void *) ((char *) fp + sizeof(struct coff_filehdr)); 335 wp = (void *) ((char *) ap + sizeof(struct coff_aouthdr)); 336 /* read section header */ 337 scnsiz = sizeof(struct coff_scnhdr) * fp->f_nscns; 338 sh = malloc(scnsiz, M_TEMP, M_WAITOK); 339 if ((error = pecoff_read_from(td, imgp->vp, peofs + PECOFF_HDR_SIZE, 340 (caddr_t) sh, scnsiz)) != 0) 341 goto fail; 342 343 /* 344 * Read Section infomation and map sections. 345 */ 346 347 for (i = 0; i < fp->f_nscns; i++) { 348 int prot = 0; 349 350 if (sh[i].s_flags & COFF_STYP_DISCARD) 351 continue; 352 /* XXX ? */ 353 if ((sh[i].s_flags & COFF_STYP_TEXT) && 354 (sh[i].s_flags & COFF_STYP_EXEC) == 0) 355 continue; 356 if ((sh[i].s_flags & (COFF_STYP_TEXT | COFF_STYP_DATA | COFF_STYP_BSS)) == 0) 357 continue; 358 359 prot |= (sh[i].s_flags & COFF_STYP_READ) ? VM_PROT_READ : 0; 360 prot |= (sh[i].s_flags & COFF_STYP_WRITE) ? VM_PROT_WRITE : 0; 361 prot |= (sh[i].s_flags & COFF_STYP_EXEC) ? VM_PROT_EXECUTE : 0; 362 363 sh[i].s_vaddr += wp->w_base; /* RVA --> VA */ 364 if ((error = pecoff_load_section(td, vmspace, imgp->vp, sh[i].s_scnptr 365 ,(caddr_t) sh[i].s_vaddr, 366 sh[i].s_paddr, sh[i].s_size 367 ,prot)) != 0) 368 goto fail; 369 370 } 371 *entry = wp->w_base + ap->a_entry; 372 *addr = wp->w_base; 373 *ldexport = wp->w_imghdr[0].i_vaddr + wp->w_base; 374 fail: 375 if (fp) 376 free(fp, M_TEMP); 377 if (sh) 378 free(sh, M_TEMP); 379 if (nd.ni_vp) 380 vrele(nd.ni_vp); 381 382 return error; 383 } 384 static int 385 exec_pecoff_coff_prep_omagic(struct image_params * imgp, 386 struct coff_filehdr * fp, 387 struct coff_aouthdr * ap, int peofs) 388 { 389 return ENOEXEC; 390 } 391 static int 392 exec_pecoff_coff_prep_nmagic(struct image_params * imgp, 393 struct coff_filehdr * fp, 394 struct coff_aouthdr * ap, int peofs) 395 { 396 return ENOEXEC; 397 } 398 static int 399 exec_pecoff_coff_prep_zmagic(struct image_params * imgp, 400 struct coff_filehdr * fp, 401 struct coff_aouthdr * ap, int peofs) 402 { 403 int scnsiz = sizeof(struct coff_scnhdr) * fp->f_nscns; 404 int error = ENOEXEC, i; 405 int prot; 406 u_long text_size = 0, data_size = 0, dsize; 407 u_long text_addr = 0, data_addr = VM_MAXUSER_ADDRESS; 408 u_long ldexport, ldbase; 409 struct pecoff_opthdr *wp; 410 struct coff_scnhdr *sh; 411 struct vmspace *vmspace; 412 struct pecoff_args *argp = NULL; 413 414 sh = malloc(scnsiz, M_TEMP, M_WAITOK); 415 416 wp = (void *) ((char *) ap + sizeof(struct coff_aouthdr)); 417 error = pecoff_read_from(FIRST_THREAD_IN_PROC(imgp->proc), imgp->vp, 418 peofs + PECOFF_HDR_SIZE, (caddr_t) sh, scnsiz); 419 exec_new_vmspace(imgp, &pecoff_sysvec); 420 vmspace = imgp->proc->p_vmspace; 421 for (i = 0; i < fp->f_nscns; i++) { 422 prot = VM_PROT_WRITE; /* XXX for relocation? */ 423 prot |= (sh[i].s_flags & COFF_STYP_READ) ? VM_PROT_READ : 0; 424 prot |= (sh[i].s_flags & COFF_STYP_WRITE) ? VM_PROT_WRITE : 0; 425 prot |= (sh[i].s_flags & COFF_STYP_EXEC) ? VM_PROT_EXECUTE : 0; 426 sh[i].s_vaddr += wp->w_base; 427 if (sh[i].s_flags & COFF_STYP_DISCARD) 428 continue; 429 if ((sh[i].s_flags & COFF_STYP_TEXT) != 0) { 430 431 error = pecoff_load_section( 432 FIRST_THREAD_IN_PROC(imgp->proc), 433 vmspace, imgp->vp, sh[i].s_scnptr, 434 (caddr_t) sh[i].s_vaddr, sh[i].s_paddr, 435 sh[i].s_size ,prot); 436 DPRINTF(("ERROR%d\n", error)); 437 if (error) 438 goto fail; 439 text_addr = trunc_page(sh[i].s_vaddr); 440 text_size = trunc_page(sh[i].s_size + sh[i].s_vaddr - text_addr); 441 442 } 443 if ((sh[i].s_flags & (COFF_STYP_DATA|COFF_STYP_BSS)) != 0) { 444 if (pecoff_load_section( 445 FIRST_THREAD_IN_PROC(imgp->proc), vmspace, 446 imgp->vp, sh[i].s_scnptr, (caddr_t) sh[i].s_vaddr, 447 sh[i].s_paddr, sh[i].s_size, prot) != 0) 448 goto fail; 449 data_addr = min(trunc_page(sh[i].s_vaddr), data_addr); 450 dsize = round_page(sh[i].s_vaddr + sh[i].s_paddr) 451 - data_addr; 452 data_size = max(dsize, data_size); 453 454 } 455 } 456 vmspace->vm_tsize = text_size >> PAGE_SHIFT; 457 vmspace->vm_taddr = (caddr_t) (uintptr_t) text_addr; 458 vmspace->vm_dsize = data_size >> PAGE_SHIFT; 459 vmspace->vm_daddr = (caddr_t) (uintptr_t) data_addr; 460 argp = malloc(sizeof(struct pecoff_args), M_TEMP, M_WAITOK); 461 if (argp == NULL) { 462 error = ENOMEM; 463 goto fail; 464 } 465 argp->a_base = wp->w_base; 466 argp->a_entry = wp->w_base + ap->a_entry; 467 argp->a_end = data_addr + data_size; 468 argp->a_subsystem = wp->w_subvers; 469 error = pecoff_load_file(FIRST_THREAD_IN_PROC(imgp->proc), 470 "/usr/libexec/ld.so.dll", &ldbase, &imgp->entry_addr, &ldexport); 471 if (error) 472 goto fail; 473 474 argp->a_ldbase = ldbase; 475 argp->a_ldexport = ldexport; 476 memcpy(argp->a_imghdr, wp->w_imghdr, sizeof(struct pecoff_imghdr) * 16); 477 for (i = 0; i < 16; i++) { 478 argp->a_imghdr[i].i_vaddr += wp->w_base; 479 } 480 imgp->proc->p_sysent = &pecoff_sysvec; 481 imgp->auxargs = argp; 482 imgp->auxarg_size = sizeof(struct pecoff_args); 483 imgp->interpreted = 0; 484 485 if (sh != NULL) 486 free(sh, M_TEMP); 487 return 0; 488 fail: 489 error = (error) ? error : ENOEXEC; 490 if (sh != NULL) 491 free(sh, M_TEMP); 492 if (argp != NULL) 493 free(argp, M_TEMP); 494 495 return error; 496 } 497 498 int 499 exec_pecoff_coff_makecmds(struct image_params * imgp, 500 struct coff_filehdr * fp, int peofs) 501 { 502 struct coff_aouthdr *ap; 503 int error; 504 505 if (COFF_BADMAG(fp)) { 506 return ENOEXEC; 507 } 508 ap = (void *) ((char *) fp + sizeof(struct coff_filehdr)); 509 switch (ap->a_magic) { 510 case COFF_OMAGIC: 511 error = exec_pecoff_coff_prep_omagic(imgp, fp, ap, peofs); 512 break; 513 case COFF_NMAGIC: 514 error = exec_pecoff_coff_prep_nmagic(imgp, fp, ap, peofs); 515 break; 516 case COFF_ZMAGIC: 517 error = exec_pecoff_coff_prep_zmagic(imgp, fp, ap, peofs); 518 break; 519 default: 520 return ENOEXEC; 521 } 522 523 return error; 524 } 525 526 static int 527 pecoff_signature(td, vp, dp) 528 struct thread *td; 529 struct vnode *vp; 530 const struct pecoff_dos_filehdr *dp; 531 { 532 int error; 533 char buf[512]; 534 char *pesig; 535 if (DOS_BADMAG(dp)) { 536 return ENOEXEC; 537 } 538 error = pecoff_read_from(td, vp, dp->d_peofs, buf, sizeof(buf)); 539 if (error) { 540 return error; 541 } 542 pesig = buf; 543 if (memcmp(pesig, signature, sizeof(signature) - 1) == 0) { 544 return 0; 545 } 546 return EFTYPE; 547 } 548 int 549 pecoff_read_from(td, vp, pos, buf, siz) 550 struct thread *td; 551 struct vnode *vp; 552 int pos; 553 caddr_t buf; 554 int siz; 555 { 556 int error; 557 size_t resid; 558 559 error = vn_rdwr(UIO_READ, vp, buf, siz, pos, 560 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED, 561 &resid, td); 562 if (error) 563 return error; 564 565 if (resid != 0) { 566 return ENOEXEC; 567 } 568 return 0; 569 } 570 571 static int 572 imgact_pecoff(struct image_params * imgp) 573 { 574 const struct pecoff_dos_filehdr *dp = (const struct pecoff_dos_filehdr *) 575 imgp->image_header; 576 struct coff_filehdr *fp; 577 int error, peofs; 578 struct thread *td = curthread; 579 580 error = pecoff_signature(FIRST_THREAD_IN_PROC(imgp->proc), 581 imgp->vp, dp); 582 if (error) { 583 return -1; 584 } 585 VOP_UNLOCK(imgp->vp, 0, td); 586 587 peofs = dp->d_peofs + sizeof(signature) - 1; 588 fp = malloc(PECOFF_HDR_SIZE, M_TEMP, M_WAITOK); 589 error = pecoff_read_from(FIRST_THREAD_IN_PROC(imgp->proc), 590 imgp->vp, peofs, (caddr_t) fp, PECOFF_HDR_SIZE); 591 if (error) 592 goto fail; 593 594 error = exec_pecoff_coff_makecmds(imgp, fp, peofs); 595 fail: 596 free(fp, M_TEMP); 597 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY, td); 598 return error; 599 } 600 601 static struct execsw pecoff_execsw = {imgact_pecoff, "FreeBSD PEcoff"}; 602 EXEC_SET(pecoff, pecoff_execsw);
Cache object: b5a1e237e0711af95e4111c83c90c0f6
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