Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]
FreeBSD/Linux Kernel Cross Reference
sys/compat/pecoff/imgact_pecoff.c
Version:
- FREEBSD - FREEBSD-13-STABLE - FREEBSD-13-0 - FREEBSD-12-STABLE - FREEBSD-12-0 - FREEBSD-11-STABLE - FREEBSD-11-0 - FREEBSD-10-STABLE - FREEBSD-10-0 - FREEBSD-9-STABLE - FREEBSD-9-0 - FREEBSD-8-STABLE - FREEBSD-8-0 - FREEBSD-7-STABLE - FREEBSD-7-0 - FREEBSD-6-STABLE - FREEBSD-6-0 - FREEBSD-5-STABLE - FREEBSD-5-0 - FREEBSD-4-STABLE - FREEBSD-3-STABLE - FREEBSD22 - l41 - OPENBSD - linux-2.6 - MK84 - PLAN9 - xnu-8792
SearchContext: - none - 3 - 10
SearchContext: - none - 3 - 10
1 /* $NetBSD$ */ 2 /* $FreeBSD: releng/5.1/sys/compat/pecoff/imgact_pecoff.c 111119 2003-02-19 05:47:46Z imp $ */ 3 4 /* 5 * Copyright (c) 2000 Masaru OKI 6 * Copyright (c) 1994, 1995, 1998 Scott Bartram 7 * Copyright (c) 1994 Adam Glass 8 * Copyright (c) 1993, 1994 Christopher G. Demetriou 9 * 10 * originally from NetBSD kern/exec_ecoff.c 11 * 12 * Copyright (c) 2000 Takanori Watanabe 13 * Copyright (c) 2000 KUROSAWA Takahiro 14 * Copyright (c) 1995-1996 Sen Schmidt 15 * Copyright (c) 1996 Peter Wemm 16 * All rights reserved. 17 * 18 * originally from FreeBSD kern/imgact_elf.c 19 * 20 * Redistribution and use in source and binary forms, with or without 21 * modification, are permitted provided that the following conditions 22 * are met: 23 * 1. Redistributions of source code must retain the above copyright 24 * notice, this list of conditions and the following disclaimer. 25 * 2. Redistributions in binary form must reproduce the above copyright 26 * notice, this list of conditions and the following disclaimer in the 27 * documentation and/or other materials provided with the distribution. 28 * 3. All advertising materials mentioning features or use of this software 29 * must display the following acknowledgement: 30 * This product includes software developed by Masaru OKI. 31 * 4. The name of the author may not be used to endorse or promote products 32 * derived from this software without specific prior written permission 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 35 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 36 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 37 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 38 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 39 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 40 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 41 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 42 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 43 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 44 */ 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/user.h> 70 #include <sys/exec.h> 71 #include <sys/kernel.h> 72 #include <sys/module.h> 73 #include <machine/cpu.h> 74 #include <sys/syscall.h> 75 #include <sys/sysent.h> 76 #include <machine/md_var.h> 77 #include <machine/pecoff_machdep.h> 78 #include <compat/pecoff/imgact_pecoff.h> 79 80 #include "opt_pecoff.h" 81 82 #define PECOFF_PE_SIGNATURE "PE\0\0" 83 static int pecoff_fixup(register_t **, struct image_params *); 84 static int 85 pecoff_coredump(register struct thread *, register struct vnode *, 86 off_t); 87 #ifndef PECOFF_DEBUG 88 #define DPRINTF(a) 89 #else 90 #define DPRINTF(a) printf a 91 #endif 92 static struct sysentvec pecoff_sysvec = { 93 SYS_MAXSYSCALL, 94 sysent, 95 0, 96 0, 97 NULL, 98 0, 99 NULL, 100 NULL, 101 pecoff_fixup, 102 sendsig, 103 sigcode, 104 &szsigcode, 105 0, 106 "FreeBSD PECoff", 107 pecoff_coredump, 108 NULL, 109 MINSIGSTKSZ, 110 PAGE_SIZE, 111 VM_MIN_ADDRESS, 112 VM_MAXUSER_ADDRESS, 113 USRSTACK, 114 PS_STRINGS, 115 VM_PROT_ALL, 116 exec_copyout_strings, 117 exec_setregs 118 119 }; 120 121 static const char signature[] = PECOFF_PE_SIGNATURE; 122 123 static int 124 exec_pecoff_coff_prep_omagic(struct image_params *, 125 struct coff_filehdr *, 126 struct coff_aouthdr *, int peoffs); 127 static int 128 exec_pecoff_coff_prep_nmagic(struct image_params *, 129 struct coff_filehdr *, 130 struct coff_aouthdr *, int peoffs); 131 static int 132 exec_pecoff_coff_prep_zmagic(struct image_params *, 133 struct coff_filehdr *, 134 struct coff_aouthdr *, int peoffs); 135 136 static int 137 exec_pecoff_coff_makecmds(struct image_params *, 138 struct coff_filehdr *, int); 139 140 static int pecoff_signature(struct thread *, struct vnode *, const struct pecoff_dos_filehdr *); 141 static int pecoff_read_from(struct thread *, struct vnode *, int, caddr_t, int); 142 static int 143 pecoff_load_section(struct thread * td, 144 struct vmspace * vmspace, struct vnode * vp, 145 vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, 146 vm_prot_t prot); 147 148 static int 149 pecoff_fixup(register_t ** stack_base, struct image_params * imgp) 150 { 151 int len = sizeof(struct pecoff_args); 152 struct pecoff_imghdr *ap; 153 register_t *pos; 154 155 pos = *stack_base + (imgp->argc + imgp->envc + 2); 156 ap = (struct pecoff_imghdr *) imgp->auxargs; 157 if (copyout(ap, pos, len)) { 158 return 0; 159 } 160 free(ap, M_TEMP); 161 imgp->auxargs = NULL; 162 (*stack_base)--; 163 suword(*stack_base, (long) imgp->argc); 164 return 0; 165 } 166 167 168 static int 169 pecoff_coredump(register struct thread * td, register struct vnode * vp, 170 off_t limit) 171 { 172 register struct ucred *cred = td->td_ucred; 173 struct proc *p = td->td_proc; 174 register struct vmspace *vm = p->p_vmspace; 175 char *tempuser; 176 int error; 177 #ifdef PECOFF_DEBUG 178 struct vm_map *map; 179 struct vm_map_entry *ent; 180 struct reg regs; 181 182 #endif 183 if (ctob((uarea_pages + kstack_pages) + vm->vm_dsize + vm->vm_ssize) >= 184 limit) 185 return (EFAULT); 186 tempuser = malloc(ctob(uarea_pages + kstack_pages), M_TEMP, 187 M_WAITOK | M_ZERO); 188 if (tempuser == NULL) 189 return (ENOMEM); 190 PROC_LOCK(p); 191 fill_kinfo_proc(p, &p->p_uarea->u_kproc); 192 PROC_UNLOCK(p); 193 bcopy(p->p_uarea, tempuser, sizeof(struct user)); 194 bcopy(td->td_frame, 195 tempuser + ctob(uarea_pages) + 196 ((caddr_t)td->td_frame - (caddr_t)td->td_kstack), 197 sizeof(struct trapframe)); 198 #if PECOFF_DEBUG 199 fill_regs(td, ®s); 200 printf("EIP%x\n", regs.r_eip); 201 printf("EAX%x EBX%x ECX%x EDI%x\n", 202 regs.r_eax, regs.r_ebx, regs.r_ecx, regs.r_edi); 203 map = &vm->vm_map; 204 ent = &map->header; 205 printf("%p %p %p\n", ent, ent->prev, ent->next); 206 #endif 207 error = vn_rdwr(UIO_WRITE, vp, (caddr_t)tempuser, 208 ctob(uarea_pages + kstack_pages), 209 (off_t)0, UIO_SYSSPACE, IO_UNIT, cred, NOCRED, 210 (int *)NULL, td); 211 free(tempuser, M_TEMP); 212 if (error == 0) 213 error = vn_rdwr_inchunks(UIO_WRITE, vp, vm->vm_daddr, 214 (int)ctob(vm->vm_dsize), 215 (off_t)ctob((uarea_pages + kstack_pages)), 216 UIO_USERSPACE, IO_UNIT, cred, NOCRED, (int *)NULL, td); 217 if (error == 0) 218 error = vn_rdwr_inchunks(UIO_WRITE, vp, 219 (caddr_t)trunc_page(USRSTACK - ctob(vm->vm_ssize)), 220 round_page(ctob(vm->vm_ssize)), 221 (off_t)ctob((uarea_pages + kstack_pages)) + 222 ctob(vm->vm_dsize), 223 UIO_USERSPACE, IO_UNIT, cred, NOCRED, (int *)NULL, td); 224 return (error); 225 226 } 227 228 static int 229 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) 230 { 231 size_t map_len; 232 vm_offset_t map_addr; 233 int error, rv; 234 size_t copy_len; 235 size_t copy_map_len; 236 size_t copy_start; 237 vm_object_t object; 238 vm_offset_t copy_map_offset; 239 vm_offset_t file_addr; 240 vm_offset_t data_buf = 0; 241 242 object = vp->v_object; 243 error = 0; 244 245 map_addr = trunc_page((vm_offset_t) vmaddr); 246 file_addr = trunc_page(offset); 247 DPRINTF(("SECARG:%x %p %x %x\n", offset, vmaddr, memsz, filsz)); 248 if (file_addr != offset) { 249 /* 250 * The section is not on page boundary. We can't use 251 * vm_map_insert(). Use copyin instead. 252 */ 253 map_len = round_page(memsz); 254 copy_len = filsz; 255 copy_map_offset = file_addr; 256 copy_map_len = round_page(offset + filsz) - file_addr; 257 copy_start = offset - file_addr; 258 259 DPRINTF(("offset=%x vmaddr=%lx filsz=%x memsz=%x\n", 260 offset, (long)vmaddr, filsz, memsz)); 261 DPRINTF(("map_len=%x copy_len=%x copy_map_offset=%x" 262 " copy_map_len=%x copy_start=%x\n", 263 map_len, copy_len, copy_map_offset, 264 copy_map_len, copy_start)); 265 } else { 266 267 map_len = trunc_page(filsz); 268 269 if (map_len != 0) { 270 vm_object_reference(object); 271 vm_map_lock(&vmspace->vm_map); 272 rv = vm_map_insert(&vmspace->vm_map, 273 object, 274 file_addr, /* file offset */ 275 map_addr, /* virtual start */ 276 map_addr + map_len, /* virtual end */ 277 prot, 278 VM_PROT_ALL, 279 MAP_COPY_ON_WRITE | MAP_PREFAULT); 280 281 vm_map_unlock(&vmspace->vm_map); 282 if (rv != KERN_SUCCESS) { 283 vm_object_deallocate(object); 284 return EINVAL; 285 } 286 /* we can stop now if we've covered it all */ 287 if (memsz == filsz) 288 return 0; 289 290 } 291 copy_map_offset = trunc_page(offset + filsz); 292 copy_map_len = PAGE_SIZE; 293 copy_start = 0; 294 copy_len = (offset + filsz) - trunc_page(offset + filsz); 295 map_addr = trunc_page((vm_offset_t) vmaddr + filsz); 296 map_len = round_page((vm_offset_t) vmaddr + memsz) - map_addr; 297 298 } 299 300 if (map_len != 0) { 301 vm_map_lock(&vmspace->vm_map); 302 rv = vm_map_insert(&vmspace->vm_map, NULL, 0, 303 map_addr, map_addr + map_len, 304 VM_PROT_ALL, VM_PROT_ALL, 0); 305 vm_map_unlock(&vmspace->vm_map); 306 DPRINTF(("EMP-rv:%d,%x %x\n", rv, map_addr, map_addr + map_len)); 307 if (rv != KERN_SUCCESS) { 308 return EINVAL; 309 } 310 } 311 DPRINTF(("COPYARG %x %x\n", map_addr, copy_len)); 312 if (copy_len != 0) { 313 vm_object_reference(object); 314 rv = vm_map_find(exec_map, 315 object, 316 copy_map_offset, 317 &data_buf, 318 copy_map_len, 319 TRUE, 320 VM_PROT_READ, 321 VM_PROT_ALL, 322 MAP_COPY_ON_WRITE | MAP_PREFAULT_PARTIAL); 323 if (rv != KERN_SUCCESS) { 324 vm_object_deallocate(object); 325 return EINVAL; 326 } 327 /* send the page fragment to user space */ 328 329 error = copyout((caddr_t) data_buf + copy_start, 330 (caddr_t) map_addr, copy_len); 331 vm_map_remove(exec_map, data_buf, data_buf + copy_map_len); 332 DPRINTF(("%d\n", error)); 333 if (error) 334 return (error); 335 } 336 /* 337 * set it to the specified protection 338 */ 339 vm_map_protect(&vmspace->vm_map, map_addr, 340 map_addr + map_len, prot, 341 FALSE); 342 return error; 343 344 } 345 static int 346 pecoff_load_file(struct thread * td, const char *file, u_long * addr, u_long * entry, u_long * ldexport) 347 { 348 349 struct nameidata nd; 350 struct pecoff_dos_filehdr dh; 351 struct coff_filehdr *fp = 0; 352 struct coff_aouthdr *ap; 353 struct pecoff_opthdr *wp; 354 struct coff_scnhdr *sh = 0; 355 struct vmspace *vmspace = td->td_proc->p_vmspace; 356 struct vattr attr; 357 struct image_params image_params, *imgp; 358 int peofs; 359 int error, i, scnsiz; 360 361 imgp = &image_params; 362 /* 363 * Initialize part of the common data 364 */ 365 imgp->proc = td->td_proc; 366 imgp->userspace_argv = NULL; 367 imgp->userspace_envv = NULL; 368 imgp->execlabel = NULL; 369 imgp->attr = &attr; 370 imgp->firstpage = NULL; 371 372 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW, UIO_SYSSPACE, file, td); 373 374 if ((error = namei(&nd)) != 0) { 375 nd.ni_vp = NULL; 376 goto fail; 377 } 378 NDFREE(&nd, NDF_ONLY_PNBUF); 379 imgp->vp = nd.ni_vp; 380 381 /* 382 * Check permissions, modes, uid, etc on the file, and "open" it. 383 */ 384 error = exec_check_permissions(imgp); 385 if (error) { 386 VOP_UNLOCK(nd.ni_vp, 0, td); 387 goto fail; 388 } 389 VOP_UNLOCK(nd.ni_vp, 0, td); 390 if (error) 391 goto fail; 392 if ((error = pecoff_read_from(td, imgp->vp, 0, (caddr_t) & dh, sizeof(dh))) != 0) 393 goto fail; 394 if ((error = pecoff_signature(td, imgp->vp, &dh) != 0)) 395 goto fail; 396 fp = malloc(PECOFF_HDR_SIZE, M_TEMP, M_WAITOK); 397 peofs = dh.d_peofs + sizeof(signature) - 1; 398 if ((error = pecoff_read_from(td, imgp->vp, peofs, (caddr_t) fp, PECOFF_HDR_SIZE) != 0)) 399 goto fail; 400 if (COFF_BADMAG(fp)) { 401 error = ENOEXEC; 402 goto fail; 403 } 404 ap = (void *) ((char *) fp + sizeof(struct coff_filehdr)); 405 wp = (void *) ((char *) ap + sizeof(struct coff_aouthdr)); 406 /* read section header */ 407 scnsiz = sizeof(struct coff_scnhdr) * fp->f_nscns; 408 sh = malloc(scnsiz, M_TEMP, M_WAITOK); 409 if ((error = pecoff_read_from(td, imgp->vp, peofs + PECOFF_HDR_SIZE, 410 (caddr_t) sh, scnsiz)) != 0) 411 goto fail; 412 413 /* 414 * Read Section infomation and map sections. 415 */ 416 417 for (i = 0; i < fp->f_nscns; i++) { 418 int prot = 0; 419 420 if (sh[i].s_flags & COFF_STYP_DISCARD) 421 continue; 422 /* XXX ? */ 423 if ((sh[i].s_flags & COFF_STYP_TEXT) && 424 (sh[i].s_flags & COFF_STYP_EXEC) == 0) 425 continue; 426 if ((sh[i].s_flags & (COFF_STYP_TEXT | COFF_STYP_DATA | COFF_STYP_BSS)) == 0) 427 continue; 428 429 prot |= (sh[i].s_flags & COFF_STYP_READ) ? VM_PROT_READ : 0; 430 prot |= (sh[i].s_flags & COFF_STYP_WRITE) ? VM_PROT_WRITE : 0; 431 prot |= (sh[i].s_flags & COFF_STYP_EXEC) ? VM_PROT_EXECUTE : 0; 432 433 sh[i].s_vaddr += wp->w_base; /* RVA --> VA */ 434 if ((error = pecoff_load_section(td, vmspace, imgp->vp, sh[i].s_scnptr 435 ,(caddr_t) sh[i].s_vaddr, 436 sh[i].s_paddr, sh[i].s_size 437 ,prot)) != 0) 438 goto fail; 439 440 } 441 *entry = wp->w_base + ap->a_entry; 442 *addr = wp->w_base; 443 *ldexport = wp->w_imghdr[0].i_vaddr + wp->w_base; 444 fail: 445 if (fp) 446 free(fp, M_TEMP); 447 if (sh) 448 free(sh, M_TEMP); 449 if (nd.ni_vp) 450 vrele(nd.ni_vp); 451 452 return error; 453 } 454 static int 455 exec_pecoff_coff_prep_omagic(struct image_params * imgp, 456 struct coff_filehdr * fp, 457 struct coff_aouthdr * ap, int peofs) 458 { 459 return ENOEXEC; 460 } 461 static int 462 exec_pecoff_coff_prep_nmagic(struct image_params * imgp, 463 struct coff_filehdr * fp, 464 struct coff_aouthdr * ap, int peofs) 465 { 466 return ENOEXEC; 467 } 468 static int 469 exec_pecoff_coff_prep_zmagic(struct image_params * imgp, 470 struct coff_filehdr * fp, 471 struct coff_aouthdr * ap, int peofs) 472 { 473 int scnsiz = sizeof(struct coff_scnhdr) * fp->f_nscns; 474 int error = ENOEXEC, i; 475 int prot; 476 u_long text_size = 0, data_size = 0, dsize; 477 u_long text_addr = 0, data_addr = VM_MAXUSER_ADDRESS; 478 u_long ldexport, ldbase; 479 struct pecoff_opthdr *wp; 480 struct coff_scnhdr *sh; 481 struct vmspace *vmspace; 482 struct pecoff_args *argp = NULL; 483 484 sh = malloc(scnsiz, M_TEMP, M_WAITOK); 485 486 wp = (void *) ((char *) ap + sizeof(struct coff_aouthdr)); 487 error = pecoff_read_from(FIRST_THREAD_IN_PROC(imgp->proc), imgp->vp, 488 peofs + PECOFF_HDR_SIZE, (caddr_t) sh, scnsiz); 489 if ((error = exec_extract_strings(imgp)) != 0) 490 goto fail; 491 exec_new_vmspace(imgp, &pecoff_sysvec); 492 vmspace = imgp->proc->p_vmspace; 493 for (i = 0; i < fp->f_nscns; i++) { 494 prot = VM_PROT_WRITE; /* XXX for relocation? */ 495 prot |= (sh[i].s_flags & COFF_STYP_READ) ? VM_PROT_READ : 0; 496 prot |= (sh[i].s_flags & COFF_STYP_WRITE) ? VM_PROT_WRITE : 0; 497 prot |= (sh[i].s_flags & COFF_STYP_EXEC) ? VM_PROT_EXECUTE : 0; 498 sh[i].s_vaddr += wp->w_base; 499 if (sh[i].s_flags & COFF_STYP_DISCARD) 500 continue; 501 if ((sh[i].s_flags & COFF_STYP_TEXT) != 0) { 502 503 error = pecoff_load_section( 504 FIRST_THREAD_IN_PROC(imgp->proc), 505 vmspace, imgp->vp, sh[i].s_scnptr, 506 (caddr_t) sh[i].s_vaddr, sh[i].s_paddr, 507 sh[i].s_size ,prot); 508 DPRINTF(("ERROR%d\n", error)); 509 if (error) 510 goto fail; 511 text_addr = trunc_page(sh[i].s_vaddr); 512 text_size = trunc_page(sh[i].s_size + sh[i].s_vaddr - text_addr); 513 514 } 515 if ((sh[i].s_flags & (COFF_STYP_DATA|COFF_STYP_BSS)) != 0) { 516 if (pecoff_load_section( 517 FIRST_THREAD_IN_PROC(imgp->proc), vmspace, 518 imgp->vp, sh[i].s_scnptr, (caddr_t) sh[i].s_vaddr, 519 sh[i].s_paddr, sh[i].s_size, prot) != 0) 520 goto fail; 521 data_addr = min(trunc_page(sh[i].s_vaddr), data_addr); 522 dsize = round_page(sh[i].s_vaddr + sh[i].s_paddr) 523 - data_addr; 524 data_size = max(dsize, data_size); 525 526 } 527 } 528 vmspace->vm_tsize = text_size >> PAGE_SHIFT; 529 vmspace->vm_taddr = (caddr_t) (uintptr_t) text_addr; 530 vmspace->vm_dsize = data_size >> PAGE_SHIFT; 531 vmspace->vm_daddr = (caddr_t) (uintptr_t) data_addr; 532 argp = malloc(sizeof(struct pecoff_args), M_TEMP, M_WAITOK); 533 if (argp == NULL) { 534 error = ENOMEM; 535 goto fail; 536 } 537 argp->a_base = wp->w_base; 538 argp->a_entry = wp->w_base + ap->a_entry; 539 argp->a_end = data_addr + data_size; 540 argp->a_subsystem = wp->w_subvers; 541 error = pecoff_load_file(FIRST_THREAD_IN_PROC(imgp->proc), 542 "/usr/libexec/ld.so.dll", &ldbase, &imgp->entry_addr, &ldexport); 543 if (error) 544 goto fail; 545 546 argp->a_ldbase = ldbase; 547 argp->a_ldexport = ldexport; 548 memcpy(argp->a_imghdr, wp->w_imghdr, sizeof(struct pecoff_imghdr) * 16); 549 for (i = 0; i < 16; i++) { 550 argp->a_imghdr[i].i_vaddr += wp->w_base; 551 } 552 imgp->proc->p_sysent = &pecoff_sysvec; 553 if (error) 554 goto fail; 555 imgp->auxargs = argp; 556 imgp->auxarg_size = sizeof(struct pecoff_args); 557 imgp->interpreted = 0; 558 559 if (sh != NULL) 560 free(sh, M_TEMP); 561 return 0; 562 fail: 563 error = (error) ? error : ENOEXEC; 564 if (sh != NULL) 565 free(sh, M_TEMP); 566 if (argp != NULL) 567 free(argp, M_TEMP); 568 569 return error; 570 } 571 572 int 573 exec_pecoff_coff_makecmds(struct image_params * imgp, 574 struct coff_filehdr * fp, int peofs) 575 { 576 struct coff_aouthdr *ap; 577 int error; 578 579 if (COFF_BADMAG(fp)) { 580 return ENOEXEC; 581 } 582 ap = (void *) ((char *) fp + sizeof(struct coff_filehdr)); 583 switch (ap->a_magic) { 584 case COFF_OMAGIC: 585 error = exec_pecoff_coff_prep_omagic(imgp, fp, ap, peofs); 586 break; 587 case COFF_NMAGIC: 588 error = exec_pecoff_coff_prep_nmagic(imgp, fp, ap, peofs); 589 break; 590 case COFF_ZMAGIC: 591 error = exec_pecoff_coff_prep_zmagic(imgp, fp, ap, peofs); 592 break; 593 default: 594 return ENOEXEC; 595 } 596 597 return error; 598 } 599 600 static int 601 pecoff_signature(td, vp, dp) 602 struct thread *td; 603 struct vnode *vp; 604 const struct pecoff_dos_filehdr *dp; 605 { 606 int error; 607 char buf[512]; 608 char *pesig; 609 if (DOS_BADMAG(dp)) { 610 return ENOEXEC; 611 } 612 error = pecoff_read_from(td, vp, dp->d_peofs, buf, sizeof(buf)); 613 if (error) { 614 return error; 615 } 616 pesig = buf; 617 if (memcmp(pesig, signature, sizeof(signature) - 1) == 0) { 618 return 0; 619 } 620 return EFTYPE; 621 } 622 int 623 pecoff_read_from(td, vp, pos, buf, siz) 624 struct thread *td; 625 struct vnode *vp; 626 int pos; 627 caddr_t buf; 628 int siz; 629 { 630 int error; 631 size_t resid; 632 633 error = vn_rdwr(UIO_READ, vp, buf, siz, pos, 634 UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED, 635 &resid, td); 636 if (error) 637 return error; 638 639 if (resid != 0) { 640 return ENOEXEC; 641 } 642 return 0; 643 } 644 645 static int 646 imgact_pecoff(struct image_params * imgp) 647 { 648 const struct pecoff_dos_filehdr *dp = (const struct pecoff_dos_filehdr *) 649 imgp->image_header; 650 struct coff_filehdr *fp; 651 int error, peofs; 652 struct thread *td = curthread; 653 654 error = pecoff_signature(FIRST_THREAD_IN_PROC(imgp->proc), 655 imgp->vp, dp); 656 if (error) { 657 return -1; 658 } 659 VOP_UNLOCK(imgp->vp, 0, td); 660 661 peofs = dp->d_peofs + sizeof(signature) - 1; 662 fp = malloc(PECOFF_HDR_SIZE, M_TEMP, M_WAITOK); 663 error = pecoff_read_from(FIRST_THREAD_IN_PROC(imgp->proc), 664 imgp->vp, peofs, (caddr_t) fp, PECOFF_HDR_SIZE); 665 if (error) 666 goto fail; 667 668 error = exec_pecoff_coff_makecmds(imgp, fp, peofs); 669 fail: 670 free(fp, M_TEMP); 671 vn_lock(imgp->vp, LK_EXCLUSIVE | LK_RETRY, td); 672 return error; 673 } 674 675 static struct execsw pecoff_execsw = {imgact_pecoff, "FreeBSD PEcoff"}; 676 EXEC_SET(pecoff, pecoff_execsw);
Cache object: 91aa2f079c67ab01fbb71632238b0e91
[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]