sys/emulation/ibcs2/coff/imgact_coff.c

   1 /*-
   2  * Copyright (c) 1994 Sean Eric Fagan
   3  * Copyright (c) 1994 Søren Schmidt
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer
  11  *    in this position and unchanged.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software withough specific prior written permission
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  *
  29  * $FreeBSD: src/sys/i386/ibcs2/imgact_coff.c,v 1.40 1999/12/15 23:01:47 eivind Exp $
  30  * $DragonFly: src/sys/emulation/ibcs2/coff/Attic/imgact_coff.c,v 1.10 2004/03/01 06:33:15 dillon Exp $
  31  */
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/mman.h>
  36 #include <sys/imgact.h>
  37 #include <sys/kernel.h>
  38 #include <sys/fcntl.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mount.h>
  41 #include <sys/proc.h>
  42 #include <sys/namei.h>
  43 #include <sys/vnode.h>
  44
  45 #include <vm/vm.h>
  46 #include <vm/pmap.h>
  47 #include <vm/vm_map.h>
  48 #include <vm/vm_kern.h>
  49 #include <vm/vm_extern.h>
  50 #include <vm/vm_zone.h>
  51
  52 #include "../i386/coff.h"
  53 #include "../i386/ibcs2_util.h"
  54
  55 extern struct sysentvec ibcs2_svr3_sysvec;
  56
  57 static int coff_load_file (struct thread *td, char *name);
  58 static int exec_coff_imgact (struct image_params *imgp);
  59
  60 static int load_coff_section (struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset, caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot);
  61
  62 static int
  63 load_coff_section(struct vmspace *vmspace, struct vnode *vp, vm_offset_t offset,
  64                   caddr_t vmaddr, size_t memsz, size_t filsz, vm_prot_t prot)
  65 {
  66         size_t map_len;
  67         vm_offset_t map_offset;
  68         vm_offset_t map_addr;
  69         int error;
  70         unsigned char *data_buf = 0;
  71         size_t copy_len;
  72
  73         map_offset = trunc_page(offset);
  74         map_addr = trunc_page((vm_offset_t)vmaddr);
  75
  76         if (memsz > filsz) {
  77                 /*
  78                  * We have the stupid situation that
  79                  * the section is longer than it is on file,
  80                  * which means it has zero-filled areas, and
  81                  * we have to work for it.  Stupid iBCS!
  82                  */
  83                 map_len = trunc_page(offset + filsz) - trunc_page(map_offset);
  84         } else {
  85                 /*
  86                  * The only stuff we care about is on disk, and we
  87                  * don't care if we map in more than is really there.
  88                  */
  89                 map_len = round_page(offset + filsz) - trunc_page(map_offset);
  90         }
  91
  92         DPRINTF(("%s(%d):  vm_mmap(&vmspace->vm_map, &0x%08lx, 0x%x, 0x%x, "
  93                 "VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED, vp, 0x%x)\n",
  94                 __FILE__, __LINE__, map_addr, map_len, prot, map_offset));
  95
  96         if ((error = vm_mmap(&vmspace->vm_map,
  97                              &map_addr,
  98                              map_len,
  99                              prot,
 100                              VM_PROT_ALL,
 101                              MAP_PRIVATE | MAP_FIXED,
 102                              (caddr_t) vp,
 103                              map_offset)) != 0)
 104                 return error;
 105
 106         if (memsz == filsz) {
 107                 /* We're done! */
 108                 return 0;
 109         }
 110
 111         /*
 112          * Now we have screwball stuff, to accomodate stupid COFF.
 113          * We have to map the remaining bit of the file into the kernel's
 114          * memory map, allocate some anonymous memory, copy that last
 115          * bit into it, and then we're done. *sigh*
 116          * For clean-up reasons, we actally map in the file last.
 117          */
 118
 119         copy_len = (offset + filsz) - trunc_page(offset + filsz);
 120         map_addr = trunc_page((vm_offset_t)vmaddr + filsz);
 121         map_len = round_page((vm_offset_t)vmaddr + memsz) - map_addr;
 122
 123         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));
 124
 125         if (map_len != 0) {
 126                 error = vm_map_find(&vmspace->vm_map, NULL, 0, &map_addr,
 127                                     map_len, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
 128                 if (error)
 129                         return error;
 130         }
 131
 132         if ((error = vm_mmap(kernel_map,
 133                             (vm_offset_t *) &data_buf,
 134                             PAGE_SIZE,
 135                             VM_PROT_READ,
 136                             VM_PROT_READ,
 137                             0,
 138                             (caddr_t) vp,
 139                             trunc_page(offset + filsz))) != 0)
 140                 return error;
 141
 142         error = copyout(data_buf, (caddr_t) map_addr, copy_len);
 143
 144         if (vm_map_remove(kernel_map,
 145                           (vm_offset_t) data_buf,
 146                           (vm_offset_t) data_buf + PAGE_SIZE))
 147                 panic("load_coff_section vm_map_remove failed");
 148
 149         return error;
 150 }
 151
 152 static int
 153 coff_load_file(struct thread *td, char *name)
 154 {
 155         struct vmspace *vmspace;
 156         int error;
 157         struct nameidata nd;
 158         struct vnode *vp;
 159         struct vattr attr;
 160         struct filehdr *fhdr;
 161         struct aouthdr *ahdr;
 162         struct scnhdr *scns;
 163         char *ptr = 0;
 164         int nscns;
 165         unsigned long text_offset = 0, text_address = 0, text_size = 0;
 166         unsigned long data_offset = 0, data_address = 0, data_size = 0;
 167         unsigned long bss_size = 0;
 168         struct ucred *cred;
 169         int i;
 170
 171         KKASSERT(td->td_proc);
 172         cred = td->td_proc->p_ucred;
 173         vmspace = td->td_proc->p_vmspace;
 174
 175         /* XXX use of 'curthread' should be 'td'?*/
 176         NDINIT(&nd, NAMEI_LOOKUP, CNP_LOCKLEAF | CNP_FOLLOW | CNP_SAVENAME, UIO_SYSSPACE, name, curthread);
 177
 178         error = namei(&nd);
 179         if (error)
 180                 return error;
 181
 182         vp = nd.ni_vp;
 183         if (vp == NULL)
 184                 return ENOEXEC;
 185
 186         if (vp->v_writecount) {
 187                 error = ETXTBSY;
 188                 goto fail;
 189         }
 190
 191         if ((error = VOP_GETATTR(vp, &attr, td)) != 0)
 192                 goto fail;
 193
 194         if ((vp->v_mount->mnt_flag & MNT_NOEXEC)
 195             || ((attr.va_mode & 0111) == 0)
 196             || (attr.va_type != VREG))
 197                 goto fail;
 198
 199         if (attr.va_size == 0) {
 200                 error = ENOEXEC;
 201                 goto fail;
 202         }
 203
 204         if ((error = VOP_ACCESS(vp, VEXEC, cred, td)) != 0)
 205                 goto fail;
 206
 207         if ((error = VOP_OPEN(vp, FREAD, cred, td)) != 0)
 208                 goto fail;
 209
 210         /*
 211          * Lose the lock on the vnode. It's no longer needed, and must not
 212          * exist for the pagefault paging to work below.
 213          */
 214         VOP_UNLOCK(vp, NULL, 0, td);
 215
 216         if ((error = vm_mmap(kernel_map,
 217                             (vm_offset_t *) &ptr,
 218                             PAGE_SIZE,
 219                             VM_PROT_READ,
 220                             VM_PROT_READ,
 221                             0,
 222                             (caddr_t) vp,
 223                             0)) != 0)
 224                 goto unlocked_fail;
 225
 226         fhdr = (struct filehdr *)ptr;
 227
 228         if (fhdr->f_magic != I386_COFF) {
 229                 error = ENOEXEC;
 230                 goto dealloc_and_fail;
 231         }
 232
 233         nscns = fhdr->f_nscns;
 234
 235         if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
 236                 /*
 237                  * XXX -- just fail.  I'm so lazy.
 238                  */
 239                 error = ENOEXEC;
 240                 goto dealloc_and_fail;
 241         }
 242
 243         ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr));
 244
 245         scns = (struct scnhdr*)(ptr + sizeof(struct filehdr)
 246                           + sizeof(struct aouthdr));
 247
 248         for (i = 0; i < nscns; i++) {
 249                 if (scns[i].s_flags & STYP_NOLOAD)
 250                         continue;
 251                 else if (scns[i].s_flags & STYP_TEXT) {
 252                         text_address = scns[i].s_vaddr;
 253                         text_size = scns[i].s_size;
 254                         text_offset = scns[i].s_scnptr;
 255                 }
 256                 else if (scns[i].s_flags & STYP_DATA) {
 257                         data_address = scns[i].s_vaddr;
 258                         data_size = scns[i].s_size;
 259                         data_offset = scns[i].s_scnptr;
 260                 } else if (scns[i].s_flags & STYP_BSS) {
 261                         bss_size = scns[i].s_size;
 262                 }
 263         }
 264
 265         if ((error = load_coff_section(vmspace, vp, text_offset,
 266                                       (caddr_t)(void *)(uintptr_t)text_address,
 267                                       text_size, text_size,
 268                                       VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
 269                 goto dealloc_and_fail;
 270         }
 271         if ((error = load_coff_section(vmspace, vp, data_offset,
 272                                       (caddr_t)(void *)(uintptr_t)data_address,
 273                                       data_size + bss_size, data_size,
 274                                       VM_PROT_ALL)) != 0) {
 275                 goto dealloc_and_fail;
 276         }
 277
 278         error = 0;
 279
 280  dealloc_and_fail:
 281         if (vm_map_remove(kernel_map,
 282                           (vm_offset_t) ptr,
 283                           (vm_offset_t) ptr + PAGE_SIZE))
 284                 panic(__FUNCTION__ " vm_map_remove failed");
 285
 286  fail:
 287         VOP_UNLOCK(vp, NULL, 0, td);
 288  unlocked_fail:
 289         NDFREE(&nd, NDF_ONLY_PNBUF);
 290         vrele(nd.ni_vp);
 291         return error;
 292 }
 293
 294 static int
 295 exec_coff_imgact(imgp)
 296         struct image_params *imgp;
 297 {
 298         const struct filehdr *fhdr = (const struct filehdr*)imgp->image_header;
 299         const struct aouthdr *ahdr;
 300         const struct scnhdr *scns;
 301         int i;
 302         struct vmspace *vmspace;
 303         int nscns;
 304         int error;
 305         unsigned long text_offset = 0, text_address = 0, text_size = 0;
 306         unsigned long data_offset = 0, data_address = 0, data_size = 0;
 307         unsigned long bss_size = 0;
 308         caddr_t hole;
 309
 310         if (fhdr->f_magic != I386_COFF ||
 311             !(fhdr->f_flags & F_EXEC)) {
 312
 313                  DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
 314                  return -1;
 315         }
 316
 317         nscns = fhdr->f_nscns;
 318         if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) {
 319                 /*
 320                  * For now, return an error -- need to be able to
 321                  * read in all of the section structures.
 322                  */
 323
 324                 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__));
 325                 return -1;
 326         }
 327
 328         ahdr = (const struct aouthdr*)
 329                ((const char*)(imgp->image_header) + sizeof(struct filehdr));
 330         imgp->entry_addr = ahdr->entry;
 331
 332         scns = (const struct scnhdr*)
 333                ((const char*)(imgp->image_header) + sizeof(struct filehdr) +
 334                 sizeof(struct aouthdr));
 335
 336         exec_new_vmspace(imgp, NULL);
 337         vmspace = imgp->proc->p_vmspace;
 338
 339         for (i = 0; i < nscns; i++) {
 340
 341           DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, "
 342                    "scns[i].s_scnptr = %d\n", i, scns[i].s_name,
 343                    scns[i].s_vaddr, scns[i].s_scnptr));
 344           if (scns[i].s_flags & STYP_NOLOAD) {
 345                 /*
 346                  * A section that is not loaded, for whatever
 347                  * reason.  It takes precedance over other flag
 348                  * bits...
 349                  */
 350                 continue;
 351           } else if (scns[i].s_flags & STYP_TEXT) {
 352                 text_address = scns[i].s_vaddr;
 353                 text_size = scns[i].s_size;
 354                 text_offset = scns[i].s_scnptr;
 355           } else if (scns[i].s_flags & STYP_DATA) {
 356                 /* .data section */
 357                 data_address = scns[i].s_vaddr;
 358                 data_size = scns[i].s_size;
 359                 data_offset = scns[i].s_scnptr;
 360           } else if (scns[i].s_flags & STYP_BSS) {
 361                 /* .bss section */
 362                 bss_size = scns[i].s_size;
 363           } else if (scns[i].s_flags & STYP_LIB) {
 364                 char *buf = 0;
 365                 int foff = trunc_page(scns[i].s_scnptr);
 366                 int off = scns[i].s_scnptr - foff;
 367                 int len = round_page(scns[i].s_size + PAGE_SIZE);
 368                 int j;
 369
 370                 if ((error = vm_mmap(kernel_map,
 371                                     (vm_offset_t *) &buf,
 372                                     len,
 373                                     VM_PROT_READ,
 374                                     VM_PROT_READ,
 375                                     0,
 376                                     (caddr_t) imgp->vp,
 377                                     foff)) != 0) {
 378                         return ENOEXEC;
 379                 }
 380                 if(scns[i].s_size) {
 381                         char *libbuf;
 382                         int emul_path_len = strlen(ibcs2_emul_path);
 383
 384                         libbuf = malloc(MAXPATHLEN + emul_path_len,
 385                                         M_TEMP, M_WAITOK);
 386                         strcpy(libbuf, ibcs2_emul_path);
 387
 388                         for (j = off; j < scns[i].s_size + off; j++) {
 389                                 char *libname;
 390
 391                                 libname = buf + j + 4 * *(long*)(buf + j + 4);
 392                                 j += 4* *(long*)(buf + j);
 393
 394                                 DPRINTF(("%s(%d):  shared library %s\n",
 395                                          __FILE__, __LINE__, libname));
 396                                 strcpy(&libbuf[emul_path_len], libname);
 397                                 error = coff_load_file(imgp->proc->p_thread, libbuf);
 398                                 if (error)
 399                                         error = coff_load_file(
 400                                                     imgp->proc->p_thread,
 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,
 425                                       (caddr_t)(void *)(uintptr_t)text_address,
 426                                       text_size, text_size,
 427                                       VM_PROT_READ | VM_PROT_EXECUTE)) != 0) {
 428                 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
 429                 return error;
 430         }
 431         /*
 432          * Map in .data and .bss now
 433          */
 434
 435
 436         DPRINTF(("%s(%d): load_coff_section(vmspace, "
 437                 "imgp->vp, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n",
 438                 __FILE__, __LINE__, data_offset, data_address,
 439                 data_size + bss_size, data_size, VM_PROT_ALL));
 440         if ((error = load_coff_section(vmspace, imgp->vp,
 441                                       data_offset,
 442                                       (caddr_t)(void *)(uintptr_t)data_address,
 443                                       data_size + bss_size, data_size,
 444                                       VM_PROT_ALL)) != 0) {
 445
 446                 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error));
 447                 return error;
 448         }
 449
 450         imgp->interpreted = 0;
 451         imgp->proc->p_sysent = &ibcs2_svr3_sysvec;
 452
 453         vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT;
 454         vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT;
 455         vmspace->vm_taddr = (caddr_t)(void *)(uintptr_t)text_address;
 456         vmspace->vm_daddr = (caddr_t)(void *)(uintptr_t)data_address;
 457
 458         hole = (caddr_t)trunc_page((vm_offset_t)vmspace->vm_daddr) + ctob(vmspace->vm_dsize);
 459
 460
 461         DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0)\n",
 462                 __FILE__, __LINE__, hole));
 463         DPRINTF(("imgact: error = %d\n", error));
 464
 465         error = vm_map_find(&vmspace->vm_map, NULL, 0,
 466                             (vm_offset_t *) &hole, PAGE_SIZE, FALSE,
 467                                 VM_PROT_ALL, VM_PROT_ALL, 0);
 468
 469         DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n",
 470                 ctob(vmspace->vm_dsize), vmspace->vm_daddr,
 471                 ctob(vmspace->vm_dsize) + vmspace->vm_daddr ));
 472         DPRINTF(("%s(%d):  returning successfully!\n", __FILE__, __LINE__));
 473
 474         /* Indicate that this file should not be modified */
 475         imgp->vp->v_flag |= VTEXT;
 476         return 0;
 477 }
 478
 479 /*
 480  * Tell kern_execve.c about it, with a little help from the linker.
 481  */
 482 static struct execsw coff_execsw = { exec_coff_imgact, "coff" };
 483 EXEC_SET(coff, coff_execsw);