imgact_coff.c revision 27537
160484Sobrien/*- 2218822Sdim * Copyright (c) 1994 Sean Eric Fagan 3218822Sdim * Copyright (c) 1994 S�ren Schmidt 460484Sobrien * All rights reserved. 560484Sobrien * 660484Sobrien * Redistribution and use in source and binary forms, with or without 760484Sobrien * modification, are permitted provided that the following conditions 860484Sobrien * are met: 960484Sobrien * 1. Redistributions of source code must retain the above copyright 1060484Sobrien * notice, this list of conditions and the following disclaimer 1160484Sobrien * in this position and unchanged. 1260484Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1360484Sobrien * notice, this list of conditions and the following disclaimer in the 1460484Sobrien * documentation and/or other materials provided with the distribution. 1560484Sobrien * 3. The name of the author may not be used to endorse or promote products 1660484Sobrien * derived from this software withough specific prior written permission 1760484Sobrien * 1860484Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19218822Sdim * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 2060484Sobrien * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 2160484Sobrien * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2260484Sobrien * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2360484Sobrien * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2460484Sobrien * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2560484Sobrien * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2660484Sobrien * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2760484Sobrien * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2860484Sobrien * 2989857Sobrien * $Id: imgact_coff.c,v 1.24 1997/04/13 01:48:13 dyson Exp $ 3089857Sobrien */ 3189857Sobrien 3289857Sobrien#include <sys/param.h> 3389857Sobrien#include <sys/systm.h> 3489857Sobrien#include <sys/mman.h> 3589857Sobrien#include <sys/imgact.h> 3689857Sobrien#include <sys/kernel.h> 3789857Sobrien#include <sys/fcntl.h> 38130561Sobrien#include <sys/malloc.h> 3960484Sobrien#include <sys/mount.h> 40218822Sdim#include <sys/namei.h> 41218822Sdim#include <sys/vnode.h> 42218822Sdim 4389857Sobrien#include <vm/vm.h> 4477298Sobrien#include <vm/vm_prot.h> 4589857Sobrien#include <vm/pmap.h> 4689857Sobrien#include <vm/vm_map.h> 4777298Sobrien#include <vm/vm_kern.h> 4877298Sobrien#include <vm/vm_extern.h> 49218822Sdim 50218822Sdim#include <i386/ibcs2/coff.h> 51218822Sdim#include <i386/ibcs2/ibcs2_util.h> 52218822Sdim 5377298Sobrienextern struct sysentvec ibcs2_svr3_sysvec; 5477298Sobrien 5577298Sobrienextern int coff_load_file __P((struct proc *p, char *name)); 5689857Sobrienextern int exec_coff_imgact __P((struct image_params *imgp)); 57218822Sdim 58218822Sdimstatic int load_coff_section __P((struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)); 59218822Sdim 6077298Sobrienstatic int 6160484Sobrienload_coff_section(vmspace, vp, offset, vmaddr, memsz, filsz, prot) 6289857Sobrien struct vmspace *vmspace; 6389857Sobrien struct vnode *vp; 6489857Sobrien vm_offset_t offset; 6589857Sobrien caddr_t vmaddr; 6689857Sobrien size_t memsz, filsz; 6789857Sobrien vm_prot_t prot; 6860484Sobrien{ 6960484Sobrien size_t map_len; 7060484Sobrien vm_offset_t map_offset; 7160484Sobrien vm_offset_t map_addr; 7260484Sobrien int error; 73218822Sdim unsigned char *data_buf = 0; 74218822Sdim size_t copy_len; 75218822Sdim 76218822Sdim map_offset = trunc_page(offset); 77218822Sdim map_addr = trunc_page(vmaddr); 7860484Sobrien 7960484Sobrien if (memsz > filsz) { 8060484Sobrien /* 8160484Sobrien * We have the stupid situation that 8260484Sobrien * the section is longer than it is on file, 8360484Sobrien * which means it has zero-filled areas, and 8477298Sobrien * we have to work for it. Stupid iBCS! 8577298Sobrien */ 8660484Sobrien map_len = trunc_page(offset + filsz) - trunc_page(map_offset); 87218822Sdim } else { 88218822Sdim /* 89218822Sdim * The only stuff we care about is on disk, and we 90218822Sdim * don't care if we map in more than is really there. 91218822Sdim */ 92218822Sdim map_len = round_page(offset + filsz) - trunc_page(map_offset); 93218822Sdim } 94218822Sdim 95218822Sdim DPRINTF(("%s(%d): vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, " 96218822Sdim "VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n", 97218822Sdim __FILE__, __LINE__, map_addr, map_len, prot, map_offset)); 98218822Sdim 99218822Sdim if (error = vm_mmap(&vmspace->vm_map, 10060484Sobrien &map_addr, 10177298Sobrien map_len, 10260484Sobrien prot, 103218822Sdim VM_PROT_ALL, 104218822Sdim MAP_PRIVATE | MAP_FIXED, 105218822Sdim (caddr_t) vp, 106218822Sdim map_offset)) 107218822Sdim return error; 108218822Sdim 109218822Sdim if (memsz == filsz) { 110218822Sdim /* We're done! */ 111218822Sdim return 0; 112218822Sdim } 113218822Sdim 114218822Sdim /* 115218822Sdim * Now we have screwball stuff, to accomodate stupid COFF. 116218822Sdim * We have to map the remaining bit of the file into the kernel's 117218822Sdim * memory map, allocate some anonymous memory, copy that last 118218822Sdim * bit into it, and then we're done. *sigh* 119218822Sdim * For clean-up reasons, we actally map in the file last. 120218822Sdim */ 121218822Sdim 122218822Sdim copy_len = (offset + filsz) - trunc_page(offset + filsz); 123218822Sdim map_addr = trunc_page(vmaddr + filsz); 124218822Sdim map_len = round_page(vmaddr + memsz) - map_addr; 125218822Sdim 126218822Sdim DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx,0x%x, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n", __FILE__, __LINE__, map_addr, map_len)); 127218822Sdim 128218822Sdim if (map_len != 0) { 129218822Sdim error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr, 130218822Sdim map_len, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0); 131218822Sdim if (error) 132218822Sdim return error; 133218822Sdim } 134218822Sdim 135218822Sdim if (error = vm_mmap(kernel_map, 136218822Sdim (vm_offset_t *) &data_buf, 137218822Sdim PAGE_SIZE, 138218822Sdim VM_PROT_READ, 139218822Sdim VM_PROT_READ, 140218822Sdim 0, 141218822Sdim (caddr_t) vp, 142218822Sdim trunc_page(offset + filsz))) 143218822Sdim return error; 144218822Sdim 145218822Sdim error = copyout(data_buf, (caddr_t) map_addr, copy_len); 146218822Sdim 147218822Sdim if (vm_map_remove(kernel_map, 148218822Sdim (vm_offset_t) data_buf, 149218822Sdim (vm_offset_t) data_buf + PAGE_SIZE)) 150218822Sdim panic("load_coff_section vm_map_remove failed"); 151218822Sdim 152218822Sdim return error; 153218822Sdim} 154218822Sdim 155218822Sdimint 156218822Sdimcoff_load_file(struct proc *p, char *name) 157218822Sdim{ 158218822Sdim struct vmspace *vmspace = p->p_vmspace; 159218822Sdim int error; 160218822Sdim struct nameidata nd; 161218822Sdim struct vnode *vp; 162218822Sdim struct vattr attr; 163218822Sdim struct filehdr *fhdr; 164218822Sdim struct aouthdr *ahdr; 165218822Sdim struct scnhdr *scns; 166218822Sdim char *ptr = 0; 167218822Sdim int nscns; 168218822Sdim unsigned long text_offset = 0, text_address = 0, text_size = 0; 169218822Sdim unsigned long data_offset = 0, data_address = 0, data_size = 0; 170218822Sdim unsigned long bss_size = 0; 171218822Sdim int i; 172218822Sdim 173218822Sdim /* XXX use of 'curproc' should be 'p'?*/ 174218822Sdim NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME, UIO_SYSSPACE, name, curproc); 175218822Sdim 176218822Sdim error = namei(&nd); 177218822Sdim if (error) 178218822Sdim return error; 179218822Sdim 180218822Sdim vp = nd.ni_vp; 181218822Sdim if (vp == NULL) 182218822Sdim return ENOEXEC; 183218822Sdim 184218822Sdim if (vp->v_writecount) { 185218822Sdim error = ETXTBSY; 186218822Sdim goto fail; 187218822Sdim } 188218822Sdim 189218822Sdim if (error = VOP_GETATTR(vp, &attr, p->p_ucred, p)) 190218822Sdim goto fail; 191218822Sdim 192218822Sdim if ((vp->v_mount->mnt_flag & MNT_NOEXEC) 193218822Sdim || ((attr.va_mode & 0111) == 0) 194218822Sdim || (attr.va_type != VREG)) 195218822Sdim goto fail; 196218822Sdim 197218822Sdim if (attr.va_size == 0) { 198218822Sdim error = ENOEXEC; 199218822Sdim goto fail; 200218822Sdim } 201218822Sdim 202218822Sdim if (error = VOP_ACCESS(vp, VEXEC, p->p_ucred, p)) 203218822Sdim goto fail; 204218822Sdim 205218822Sdim if (error = VOP_OPEN(vp, FREAD, p->p_ucred, p)) 206218822Sdim goto fail; 207218822Sdim 208218822Sdim /* 209218822Sdim * Lose the lock on the vnode. It's no longer needed, and must not 210218822Sdim * exist for the pagefault paging to work below. 211218822Sdim */ 212218822Sdim VOP_UNLOCK(vp, 0, p); 213218822Sdim 214218822Sdim if (error = vm_mmap(kernel_map, 215218822Sdim (vm_offset_t *) &ptr, 216218822Sdim PAGE_SIZE, 217218822Sdim VM_PROT_READ, 218218822Sdim VM_PROT_READ, 219218822Sdim 0, 220218822Sdim (caddr_t) vp, 221218822Sdim 0)) 222218822Sdim goto fail; 223218822Sdim 224218822Sdim fhdr = (struct filehdr *)ptr; 225218822Sdim 226218822Sdim if (fhdr->f_magic != I386_COFF) { 227218822Sdim error = ENOEXEC; 228218822Sdim goto dealloc_and_fail; 229218822Sdim } 230218822Sdim 231218822Sdim nscns = fhdr->f_nscns; 232218822Sdim 233218822Sdim if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) { 234218822Sdim /* 235218822Sdim * XXX -- just fail. I'm so lazy. 236218822Sdim */ 23777298Sobrien error = ENOEXEC; 23860484Sobrien goto dealloc_and_fail; 239218822Sdim } 240218822Sdim 241218822Sdim ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr)); 242218822Sdim 243218822Sdim scns = (struct scnhdr*)(ptr + sizeof(struct filehdr) 244218822Sdim + sizeof(struct aouthdr)); 245218822Sdim 246218822Sdim for (i = 0; i < nscns; i++) { 247218822Sdim if (scns[i].s_flags & STYP_NOLOAD) 248218822Sdim continue; 249218822Sdim else if (scns[i].s_flags & STYP_TEXT) { 250218822Sdim text_address = scns[i].s_vaddr; 251218822Sdim text_size = scns[i].s_size; 252218822Sdim text_offset = scns[i].s_scnptr; 253218822Sdim } 254218822Sdim else if (scns[i].s_flags & STYP_DATA) { 255218822Sdim data_address = scns[i].s_vaddr; 256218822Sdim data_size = scns[i].s_size; 257218822Sdim data_offset = scns[i].s_scnptr; 258218822Sdim } else if (scns[i].s_flags & STYP_BSS) { 259218822Sdim bss_size = scns[i].s_size; 260218822Sdim } 261218822Sdim } 262218822Sdim 263218822Sdim if (error = load_coff_section(vmspace, vp, text_offset, 264218822Sdim (caddr_t)text_address, 265218822Sdim text_size, text_size, 266218822Sdim VM_PROT_READ | VM_PROT_EXECUTE)) { 267218822Sdim goto dealloc_and_fail; 268218822Sdim } 269218822Sdim if (error = load_coff_section(vmspace, vp, data_offset, 270218822Sdim (caddr_t)data_address, 271218822Sdim data_size + bss_size, data_size, 272218822Sdim VM_PROT_ALL)) { 273218822Sdim goto dealloc_and_fail; 274218822Sdim } 275218822Sdim 276218822Sdim error = 0; 277218822Sdim 278130561Sobrien dealloc_and_fail: 279130561Sobrien if (vm_map_remove(kernel_map, 280218822Sdim (vm_offset_t) ptr, 281218822Sdim (vm_offset_t) ptr + PAGE_SIZE)) 282218822Sdim panic(__FUNCTION__ " vm_map_remove failed"); 283218822Sdim 284218822Sdim fail: 285218822Sdim vput(nd.ni_vp); 286218822Sdim FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 28777298Sobrien return error; 288} 289 290int 291exec_coff_imgact(imgp) 292 struct image_params *imgp; 293{ 294 const struct filehdr *fhdr = (const struct filehdr*)imgp->image_header; 295 const struct aouthdr *ahdr; 296 const struct scnhdr *scns; 297 int i; 298 struct vmspace *vmspace; 299 int nscns; 300 int error; 301 unsigned long text_offset = 0, text_address = 0, text_size = 0; 302 unsigned long data_offset = 0, data_address = 0, data_size = 0; 303 unsigned long bss_size = 0; 304 caddr_t hole; 305 306 if (fhdr->f_magic != I386_COFF || 307 !(fhdr->f_flags & F_EXEC)) { 308 309 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__)); 310 return -1; 311 } 312 313 nscns = fhdr->f_nscns; 314 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) { 315 /* 316 * For now, return an error -- need to be able to 317 * read in all of the section structures. 318 */ 319 320 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__)); 321 return -1; 322 } 323 324 ahdr = (const struct aouthdr*) 325 ((const char*)(imgp->image_header) + sizeof(struct filehdr)); 326 imgp->entry_addr = ahdr->entry; 327 328 scns = (const struct scnhdr*) 329 ((const char*)(imgp->image_header) + sizeof(struct filehdr) + 330 sizeof(struct aouthdr)); 331 332 if (error = exec_extract_strings(imgp)) { 333 DPRINTF(("%s(%d): return %d\n", __FILE__, __LINE__, error)); 334 return error; 335 } 336 337 exec_new_vmspace(imgp); 338 vmspace = imgp->proc->p_vmspace; 339 340 for (i = 0; i < nscns; i++) { 341 342 DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, " 343 "scns[i].s_scnptr = %d\n", i, scns[i].s_name, 344 scns[i].s_vaddr, scns[i].s_scnptr)); 345 if (scns[i].s_flags & STYP_NOLOAD) { 346 /* 347 * A section that is not loaded, for whatever 348 * reason. It takes precedance over other flag 349 * bits... 350 */ 351 continue; 352 } else if (scns[i].s_flags & STYP_TEXT) { 353 text_address = scns[i].s_vaddr; 354 text_size = scns[i].s_size; 355 text_offset = scns[i].s_scnptr; 356 } else if (scns[i].s_flags & STYP_DATA) { 357 /* .data section */ 358 data_address = scns[i].s_vaddr; 359 data_size = scns[i].s_size; 360 data_offset = scns[i].s_scnptr; 361 } else if (scns[i].s_flags & STYP_BSS) { 362 /* .bss section */ 363 bss_size = scns[i].s_size; 364 } else if (scns[i].s_flags & STYP_LIB) { 365 char *buf = 0; 366 int foff = trunc_page(scns[i].s_scnptr); 367 int off = scns[i].s_scnptr - foff; 368 int len = round_page(scns[i].s_size + PAGE_SIZE); 369 int j; 370 371 if (error = vm_mmap(kernel_map, 372 (vm_offset_t *) &buf, 373 len, 374 VM_PROT_READ, 375 VM_PROT_READ, 376 0, 377 (caddr_t) imgp->vp, 378 foff)) { 379 return ENOEXEC; 380 } 381 if(scns[i].s_size) { 382 char *libbuf; 383 int emul_path_len = strlen(ibcs2_emul_path); 384 385 libbuf = malloc(MAXPATHLEN + emul_path_len, 386 M_TEMP, M_WAITOK); 387 strcpy(libbuf, ibcs2_emul_path); 388 389 for (j = off; j < scns[i].s_size + off; j++) { 390 char *libname; 391 392 libname = buf + j + 4 * *(long*)(buf + j + 4); 393 j += 4* *(long*)(buf + j); 394 395 DPRINTF(("%s(%d): shared library %s\n", 396 __FILE__, __LINE__, libname)); 397 strcpy(&libbuf[emul_path_len], libname); 398 error = coff_load_file(imgp->proc, libbuf); 399 if (error) 400 error = coff_load_file(imgp->proc, 401 libname); 402 if (error) 403 break; 404 } 405 free(libbuf, M_TEMP); 406 } 407 if (vm_map_remove(kernel_map, 408 (vm_offset_t) buf, 409 (vm_offset_t) buf + len)) 410 panic("exec_coff_imgact vm_map_remove failed"); 411 if (error) 412 return error; 413 } 414 } 415 /* 416 * Map in .text now 417 */ 418 419 DPRINTF(("%s(%d): load_coff_section(vmspace, " 420 "imgp->vp, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n", 421 __FILE__, __LINE__, text_offset, text_address, 422 text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE)); 423 if (error = load_coff_section(vmspace, imgp->vp, 424 text_offset, (caddr_t)text_address, 425 text_size, text_size, 426 VM_PROT_READ | VM_PROT_EXECUTE)) { 427 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error)); 428 return error; 429 } 430 /* 431 * Map in .data and .bss now 432 */ 433 434 435 DPRINTF(("%s(%d): load_coff_section(vmspace, " 436 "imgp->vp, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n", 437 __FILE__, __LINE__, data_offset, data_address, 438 data_size + bss_size, data_size, VM_PROT_ALL)); 439 if (error = load_coff_section(vmspace, imgp->vp, 440 data_offset, (caddr_t)data_address, 441 data_size + bss_size, data_size, 442 VM_PROT_ALL)) { 443 444 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error)); 445 return error; 446 } 447 448 imgp->interpreted = 0; 449 imgp->proc->p_sysent = &ibcs2_svr3_sysvec; 450 451 vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT; 452 vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT; 453 vmspace->vm_taddr = (caddr_t)text_address; 454 vmspace->vm_daddr = (caddr_t)data_address; 455 456 hole = (caddr_t)trunc_page(vmspace->vm_daddr) + ctob(vmspace->vm_dsize); 457 458 459 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n", 460 __FILE__, __LINE__, hole)); 461 DPRINTF(("imgact: error = %d\n", error)); 462 463 error = vm_map_find(&vmspace->vm_map, NULL, 0, 464 (vm_offset_t *) &hole, PAGE_SIZE, FALSE, 465 VM_PROT_ALL, VM_PROT_ALL, 0); 466 467 DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n", 468 ctob(vmspace->vm_dsize), vmspace->vm_daddr, 469 ctob(vmspace->vm_dsize) + vmspace->vm_daddr )); 470 DPRINTF(("%s(%d): returning successfully!\n", __FILE__, __LINE__)); 471 472 /* Indicate that this file should not be modified */ 473 imgp->vp->v_flag |= VTEXT; 474 return 0; 475} 476 477/* 478 * Tell kern_execve.c about it, with a little help from the linker. 479 * Since `const' objects end up in the text segment, TEXT_SET is the 480 * correct directive to use. 481 */ 482const struct execsw coff_execsw = { exec_coff_imgact, "coff" }; 483TEXT_SET(execsw_set, coff_execsw); 484