imgact_coff.c revision 11397
1/*- 2 * Copyright (c) 1994 Sean Eric Fagan 3 * Copyright (c) 1994 S�ren 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 * $Id: imgact_coff.c,v 1.7 1995/09/13 02:12:51 sef Exp $ 30 */ 31 32#include <sys/param.h> 33#include <sys/systm.h> 34#include <sys/resourcevar.h> 35#include <sys/exec.h> 36#include <sys/mman.h> 37#include <sys/imgact.h> 38#include <sys/kernel.h> 39#include <sys/file.h> 40#include <sys/malloc.h> 41#include <sys/mount.h> 42#include <sys/sysent.h> 43#include <vm/vm.h> 44#include <vm/vm_kern.h> 45 46#include <i386/ibcs2/coff.h> 47#include <i386/ibcs2/ibcs2_util.h> 48 49extern struct sysentvec ibcs2_svr3_sysvec; 50 51extern int coff_load_file __P((struct proc *p, char *name)); 52extern int exec_coff_imgact __P((struct image_params *iparams)); 53 54static 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)); 55 56 57static int 58load_coff_section(vmspace, vp, offset, vmaddr, memsz, filsz, prot) 59 struct vmspace *vmspace; 60 struct vnode *vp; 61 vm_offset_t offset; 62 caddr_t vmaddr; 63 size_t memsz, filsz; 64 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(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_FILE | 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_FILE | MAP_PRIVATE | MAP_FIXED, 102 (caddr_t) vp, 103 map_offset)) 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(vmaddr + filsz); 121 map_len = round_page(memsz) - trunc_page(filsz); 122 123 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx,0x%x, FALSE)\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); 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 MAP_FILE, 138 (caddr_t) vp, 139 trunc_page(offset + filsz))) 140 return error; 141 142 bcopy(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 0; 150} 151 152int 153coff_load_file(struct proc *p, char *name) 154{ 155 struct vmspace *vmspace = p->p_vmspace; 156 int error; 157 struct nameidata nd; 158 struct vnode *vnodep; 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 int i; 169 170 /* XXX use of 'curproc' should be 'p'?*/ 171 NDINIT(&nd, LOOKUP, LOCKLEAF | FOLLOW | SAVENAME, UIO_SYSSPACE, name, curproc); 172 173 error = namei(&nd); 174 if (error) 175 return error; 176 177 vnodep = nd.ni_vp; 178 if (vnodep == NULL) 179 return ENOEXEC; 180 181 if (vnodep->v_writecount) { 182 error = ETXTBSY; 183 goto fail; 184 } 185 186 if (error = VOP_GETATTR(vnodep, &attr, p->p_ucred, p)) 187 goto fail; 188 189 if ((vnodep->v_mount->mnt_flag & MNT_NOEXEC) 190 || ((attr.va_mode & 0111) == 0) 191 || (attr.va_type != VREG)) 192 goto fail; 193 194 if (attr.va_size == 0) { 195 error = ENOEXEC; 196 goto fail; 197 } 198 199 if (error = VOP_ACCESS(vnodep, VEXEC, p->p_ucred, p)) 200 goto fail; 201 202 if (error = VOP_OPEN(vnodep, FREAD, p->p_ucred, p)) 203 goto fail; 204 205 /* 206 * Lose the lock on the vnode. It's no longer needed, and must not 207 * exist for the pagefault paging to work below. 208 */ 209 VOP_UNLOCK(vnodep); 210 211 if (error = vm_mmap(kernel_map, 212 (vm_offset_t *) &ptr, 213 PAGE_SIZE, 214 VM_PROT_READ, 215 VM_PROT_READ, 216 MAP_FILE, 217 (caddr_t) vnodep, 218 0)) 219 goto fail; 220 221 fhdr = (struct filehdr *)ptr; 222 223 if (fhdr->f_magic != I386_COFF) { 224 error = ENOEXEC; 225 goto dealloc_and_fail; 226 } 227 228 nscns = fhdr->f_nscns; 229 230 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) { 231 /* 232 * XXX -- just fail. I'm so lazy. 233 */ 234 error = ENOEXEC; 235 goto dealloc_and_fail; 236 } 237 238 ahdr = (struct aouthdr*)(ptr + sizeof(struct filehdr)); 239 240 scns = (struct scnhdr*)(ptr + sizeof(struct filehdr) 241 + sizeof(struct aouthdr)); 242 243 for (i = 0; i < nscns; i++) { 244 if (scns[i].s_flags & STYP_NOLOAD) 245 continue; 246 else if (scns[i].s_flags & STYP_TEXT) { 247 text_address = scns[i].s_vaddr; 248 text_size = scns[i].s_size; 249 text_offset = scns[i].s_scnptr; 250 } 251 else if (scns[i].s_flags & STYP_DATA) { 252 data_address = scns[i].s_vaddr; 253 data_size = scns[i].s_size; 254 data_offset = scns[i].s_scnptr; 255 } else if (scns[i].s_flags & STYP_BSS) { 256 bss_size = scns[i].s_size; 257 } 258 } 259 260 if (error = load_coff_section(vmspace, vnodep, text_offset, 261 (caddr_t)text_address, 262 text_size, text_size, 263 VM_PROT_READ | VM_PROT_EXECUTE)) { 264 goto dealloc_and_fail; 265 } 266 if (error = load_coff_section(vmspace, vnodep, data_offset, 267 (caddr_t)data_address, 268 data_size + bss_size, data_size, 269 VM_PROT_ALL)) { 270 goto dealloc_and_fail; 271 } 272 273 error = 0; 274 275 dealloc_and_fail: 276 if (vm_map_remove(kernel_map, 277 (vm_offset_t) ptr, 278 (vm_offset_t) ptr + PAGE_SIZE)) 279 panic(__FUNCTION__ " vm_map_remove failed"); 280 281 fail: 282 vput(nd.ni_vp); 283 FREE(nd.ni_cnd.cn_pnbuf, M_NAMEI); 284 return error; 285} 286 287int 288exec_coff_imgact(iparams) 289 struct image_params *iparams; 290{ 291 struct filehdr *fhdr = (struct filehdr*)iparams->image_header; 292 struct aouthdr *ahdr; 293 struct scnhdr *scns; 294 int i; 295 struct vmspace *vmspace = iparams->proc->p_vmspace; 296 unsigned long vmaddr; 297 int nscns; 298 int error, len; 299 unsigned long text_offset = 0, text_address = 0, text_size = 0; 300 unsigned long data_offset = 0, data_address = 0, data_size = 0; 301 unsigned long bss_size = 0; 302 int need_hack_p; 303 unsigned long data_end; 304 unsigned long data_map_start, data_map_len, data_map_addr = 0; 305 unsigned long bss_address, bss_map_start, data_copy_len, bss_map_len; 306 unsigned char *data_buf = 0; 307 caddr_t hole; 308 309 if (fhdr->f_magic != I386_COFF || 310 !(fhdr->f_flags & F_EXEC)) { 311 312 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__)); 313 return -1; 314 } 315 316 nscns = fhdr->f_nscns; 317 if ((nscns * sizeof(struct scnhdr)) > PAGE_SIZE) { 318 /* 319 * For now, return an error -- need to be able to 320 * read in all of the section structures. 321 */ 322 323 DPRINTF(("%s(%d): return -1\n", __FILE__, __LINE__)); 324 return -1; 325 } 326 327 ahdr = (struct aouthdr*)((char*)(iparams->image_header) + 328 sizeof(struct filehdr)); 329 iparams->entry_addr = ahdr->entry; 330 331 scns = (struct scnhdr*)((char*)(iparams->image_header) + 332 sizeof(struct filehdr) + 333 sizeof(struct aouthdr)); 334 335 if (error = exec_extract_strings(iparams)) { 336 DPRINTF(("%s(%d): return %d\n", __FILE__, __LINE__, error)); 337 return error; 338 } 339 340 exec_new_vmspace(iparams); 341 342 for (i = 0; i < nscns; i++) { 343 344 DPRINTF(("i = %d, scns[i].s_name = %s, scns[i].s_vaddr = %08lx, " 345 "scns[i].s_scnptr = %d\n", i, scns[i].s_name, 346 scns[i].s_vaddr, scns[i].s_scnptr)); 347 if (scns[i].s_flags & STYP_NOLOAD) { 348 /* 349 * A section that is not loaded, for whatever 350 * reason. It takes precedance over other flag 351 * bits... 352 */ 353 continue; 354 } else if (scns[i].s_flags & STYP_TEXT) { 355 text_address = scns[i].s_vaddr; 356 text_size = scns[i].s_size; 357 text_offset = scns[i].s_scnptr; 358 } else if (scns[i].s_flags & STYP_DATA) { 359 /* .data section */ 360 data_address = scns[i].s_vaddr; 361 data_size = scns[i].s_size; 362 data_offset = scns[i].s_scnptr; 363 } else if (scns[i].s_flags & STYP_BSS) { 364 /* .bss section */ 365 bss_size = scns[i].s_size; 366 } else if (scns[i].s_flags & STYP_LIB) { 367 char *buf = 0, *ptr; 368 int foff = trunc_page(scns[i].s_scnptr); 369 int off = scns[i].s_scnptr - foff; 370 int len = round_page(scns[i].s_size + PAGE_SIZE); 371 int j; 372 373 if (error = vm_mmap(kernel_map, 374 (vm_offset_t *) &buf, 375 len, 376 VM_PROT_READ, 377 VM_PROT_READ, 378 MAP_FILE, 379 (caddr_t) iparams->vnodep, 380 foff)) { 381 return ENOEXEC; 382 } 383 for (j = off; j < scns[i].s_size + off; j++) { 384 char *libname; 385 char libbuf[40]; 386 387 libname = buf + j + 4 * *(long*)(buf + j + 4); 388 j += 4* *(long*)(buf + j); 389 390 DPRINTF(("%s(%d): shared library %s\n", 391 __FILE__, __LINE__, libname)); 392 strcpy(libbuf, "/emul/ibcs2"); 393 strcpy(&libbuf[11], libname); 394 error = coff_load_file(iparams->proc, libbuf); 395 if (error) 396 error = coff_load_file(iparams->proc, libname); 397 if (error) 398 break; 399 } 400 if (vm_map_remove(kernel_map, 401 (vm_offset_t) buf, 402 (vm_offset_t) buf + len)) 403 panic("exec_coff_imgact vm_map_remove failed"); 404 if (error) 405 return error; 406 } 407 } 408 /* 409 * Map in .text now 410 */ 411 412 DPRINTF(("%s(%d): load_coff_section(vmspace, " 413 "iparams->vnodep, %08lx, %08lx, 0x%x, 0x%x, 0x%x)\n", 414 __FILE__, __LINE__, text_offset, text_address, 415 text_size, text_size, VM_PROT_READ | VM_PROT_EXECUTE)); 416 if (error = load_coff_section(vmspace, iparams->vnodep, 417 text_offset, (caddr_t)text_address, 418 text_size, text_size, 419 VM_PROT_READ | VM_PROT_EXECUTE)) { 420 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error)); 421 return error; 422 } 423 /* 424 * Map in .data and .bss now 425 */ 426 427 428 DPRINTF(("%s(%d): load_coff_section(vmspace, " 429 "iparams->vnodep, 0x%08lx, 0x%08lx, 0x%x, 0x%x, 0x%x)\n", 430 __FILE__, __LINE__, data_offset, data_address, 431 data_size + bss_size, data_size, VM_PROT_ALL)); 432 if (error = load_coff_section(vmspace, iparams->vnodep, 433 data_offset, (caddr_t)data_address, 434 data_size + bss_size, data_size, 435 VM_PROT_ALL)) { 436 437 DPRINTF(("%s(%d): error = %d\n", __FILE__, __LINE__, error)); 438 return error; 439 } 440 441 iparams->interpreted = 0; 442 iparams->proc->p_sysent = &ibcs2_svr3_sysvec; 443 444 vmspace->vm_tsize = round_page(text_size) >> PAGE_SHIFT; 445 vmspace->vm_dsize = round_page(data_size + bss_size) >> PAGE_SHIFT; 446 vmspace->vm_taddr = (caddr_t)text_address; 447 vmspace->vm_daddr = (caddr_t)data_address; 448 449 hole = (caddr_t)trunc_page(vmspace->vm_daddr) + ctob(vmspace->vm_dsize); 450 451 452 DPRINTF(("%s(%d): vm_map_find(&vmspace->vm_map, NULL, 0, &0x%08lx, PAGE_SIZE, FALSE)\n", 453 __FILE__, __LINE__, hole)); 454 DPRINTF(("imgact: error = %d\n", error)); 455 456 error = vm_map_find(&vmspace->vm_map, NULL, 0, 457 (vm_offset_t *) &hole, PAGE_SIZE, FALSE); 458 459 DPRINTF(("IBCS2: start vm_dsize = 0x%x, vm_daddr = 0x%x end = 0x%x\n", 460 ctob(vmspace->vm_dsize), vmspace->vm_daddr, 461 ctob(vmspace->vm_dsize) + vmspace->vm_daddr )); 462 DPRINTF(("%s(%d): returning successfully!\n", __FILE__, __LINE__)); 463 464 /* Indicate that this file should not be modified */ 465 iparams->vnodep->v_flag |= VTEXT; 466 return 0; 467} 468 469/* 470 * Tell kern_execve.c about it, with a little help from the linker. 471 * Since `const' objects end up in the text segment, TEXT_SET is the 472 * correct directive to use. 473 */ 474const struct execsw coff_execsw = { exec_coff_imgact, "coff" }; 475TEXT_SET(execsw_set, coff_execsw); 476