fs/binfmt_elf_fdpic.c

   1 /* binfmt_elf_fdpic.c: FDPIC ELF binary format
   2  *
   3  * Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  * Derived from binfmt_elf.c
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version
  10  * 2 of the License, or (at your option) any later version.
  11  */
  12
  13 #include <linux/module.h>
  14
  15 #include <linux/fs.h>
  16 #include <linux/stat.h>
  17 #include <linux/sched.h>
  18 #include <linux/mm.h>
  19 #include <linux/mman.h>
  20 #include <linux/errno.h>
  21 #include <linux/signal.h>
  22 #include <linux/binfmts.h>
  23 #include <linux/string.h>
  24 #include <linux/file.h>
  25 #include <linux/fcntl.h>
  26 #include <linux/slab.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/security.h>
  29 #include <linux/highmem.h>
  30 #include <linux/highuid.h>
  31 #include <linux/personality.h>
  32 #include <linux/ptrace.h>
  33 #include <linux/init.h>
  34 #include <linux/elf.h>
  35 #include <linux/elf-fdpic.h>
  36 #include <linux/elfcore.h>
  37
  38 #include <asm/uaccess.h>
  39 #include <asm/param.h>
  40 #include <asm/pgalloc.h>
  41
  42 typedef char *elf_caddr_t;
  43
  44 #if 0
  45 #define kdebug(fmt, ...) printk("FDPIC "fmt"\n" ,##__VA_ARGS__ )
  46 #else
  47 #define kdebug(fmt, ...) do {} while(0)
  48 #endif
  49
  50 #if 0
  51 #define kdcore(fmt, ...) printk("FDPIC "fmt"\n" ,##__VA_ARGS__ )
  52 #else
  53 #define kdcore(fmt, ...) do {} while(0)
  54 #endif
  55
  56 MODULE_LICENSE("GPL");
  57
  58 static int load_elf_fdpic_binary(struct linux_binprm *, struct pt_regs *);
  59 static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *);
  60 static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *,
  61                               struct mm_struct *, const char *);
  62
  63 static int create_elf_fdpic_tables(struct linux_binprm *, struct mm_struct *,
  64                                    struct elf_fdpic_params *,
  65                                    struct elf_fdpic_params *);
  66
  67 #ifndef CONFIG_MMU
  68 static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *,
  69                                             unsigned long *);
  70 static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *,
  71                                                    struct file *,
  72                                                    struct mm_struct *);
  73 #endif
  74
  75 static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *,
  76                                              struct file *, struct mm_struct *);
  77
  78 #ifdef CONFIG_ELF_CORE
  79 static int elf_fdpic_core_dump(struct coredump_params *cprm);
  80 #endif
  81
  82 static struct linux_binfmt elf_fdpic_format = {
  83         .module         = THIS_MODULE,
  84         .load_binary    = load_elf_fdpic_binary,
  85 #ifdef CONFIG_ELF_CORE
  86         .core_dump      = elf_fdpic_core_dump,
  87 #endif
  88         .min_coredump   = ELF_EXEC_PAGESIZE,
  89 };
  90
  91 static int __init init_elf_fdpic_binfmt(void)
  92 {
  93         return register_binfmt(&elf_fdpic_format);
  94 }
  95
  96 static void __exit exit_elf_fdpic_binfmt(void)
  97 {
  98         unregister_binfmt(&elf_fdpic_format);
  99 }
 100
 101 core_initcall(init_elf_fdpic_binfmt);
 102 module_exit(exit_elf_fdpic_binfmt);
 103
 104 static int is_elf_fdpic(struct elfhdr *hdr, struct file *file)
 105 {
 106         if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0)
 107                 return 0;
 108         if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN)
 109                 return 0;
 110         if (!elf_check_arch(hdr) || !elf_check_fdpic(hdr))
 111                 return 0;
 112         if (!file->f_op || !file->f_op->mmap)
 113                 return 0;
 114         return 1;
 115 }
 116
 117 /*****************************************************************************/
 118 /*
 119  * read the program headers table into memory
 120  */
 121 static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params,
 122                                  struct file *file)
 123 {
 124         struct elf32_phdr *phdr;
 125         unsigned long size;
 126         int retval, loop;
 127
 128         if (params->hdr.e_phentsize != sizeof(struct elf_phdr))
 129                 return -ENOMEM;
 130         if (params->hdr.e_phnum > 65536U / sizeof(struct elf_phdr))
 131                 return -ENOMEM;
 132
 133         size = params->hdr.e_phnum * sizeof(struct elf_phdr);
 134         params->phdrs = kmalloc(size, GFP_KERNEL);
 135         if (!params->phdrs)
 136                 return -ENOMEM;
 137
 138         retval = kernel_read(file, params->hdr.e_phoff,
 139                              (char *) params->phdrs, size);
 140         if (unlikely(retval != size))
 141                 return retval < 0 ? retval : -ENOEXEC;
 142
 143         /* determine stack size for this binary */
 144         phdr = params->phdrs;
 145         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
 146                 if (phdr->p_type != PT_GNU_STACK)
 147                         continue;
 148
 149                 if (phdr->p_flags & PF_X)
 150                         params->flags |= ELF_FDPIC_FLAG_EXEC_STACK;
 151                 else
 152                         params->flags |= ELF_FDPIC_FLAG_NOEXEC_STACK;
 153
 154                 params->stack_size = phdr->p_memsz;
 155                 break;
 156         }
 157
 158         return 0;
 159 }
 160
 161 /*****************************************************************************/
 162 /*
 163  * load an fdpic binary into various bits of memory
 164  */
 165 static int load_elf_fdpic_binary(struct linux_binprm *bprm,
 166                                  struct pt_regs *regs)
 167 {
 168         struct elf_fdpic_params exec_params, interp_params;
 169         struct elf_phdr *phdr;
 170         unsigned long stack_size, entryaddr;
 171 #ifdef ELF_FDPIC_PLAT_INIT
 172         unsigned long dynaddr;
 173 #endif
 174 #ifndef CONFIG_MMU
 175         unsigned long stack_prot;
 176 #endif
 177         struct file *interpreter = NULL; /* to shut gcc up */
 178         char *interpreter_name = NULL;
 179         int executable_stack;
 180         int retval, i;
 181
 182         kdebug("____ LOAD %d ____", current->pid);
 183
 184         memset(&exec_params, 0, sizeof(exec_params));
 185         memset(&interp_params, 0, sizeof(interp_params));
 186
 187         exec_params.hdr = *(struct elfhdr *) bprm->buf;
 188         exec_params.flags = ELF_FDPIC_FLAG_PRESENT | ELF_FDPIC_FLAG_EXECUTABLE;
 189
 190         /* check that this is a binary we know how to deal with */
 191         retval = -ENOEXEC;
 192         if (!is_elf_fdpic(&exec_params.hdr, bprm->file))
 193                 goto error;
 194
 195         /* read the program header table */
 196         retval = elf_fdpic_fetch_phdrs(&exec_params, bprm->file);
 197         if (retval < 0)
 198                 goto error;
 199
 200         /* scan for a program header that specifies an interpreter */
 201         phdr = exec_params.phdrs;
 202
 203         for (i = 0; i < exec_params.hdr.e_phnum; i++, phdr++) {
 204                 switch (phdr->p_type) {
 205                 case PT_INTERP:
 206                         retval = -ENOMEM;
 207                         if (phdr->p_filesz > PATH_MAX)
 208                                 goto error;
 209                         retval = -ENOENT;
 210                         if (phdr->p_filesz < 2)
 211                                 goto error;
 212
 213                         /* read the name of the interpreter into memory */
 214                         interpreter_name = kmalloc(phdr->p_filesz, GFP_KERNEL);
 215                         if (!interpreter_name)
 216                                 goto error;
 217
 218                         retval = kernel_read(bprm->file,
 219                                              phdr->p_offset,
 220                                              interpreter_name,
 221                                              phdr->p_filesz);
 222                         if (unlikely(retval != phdr->p_filesz)) {
 223                                 if (retval >= 0)
 224                                         retval = -ENOEXEC;
 225                                 goto error;
 226                         }
 227
 228                         retval = -ENOENT;
 229                         if (interpreter_name[phdr->p_filesz - 1] != '\0')
 230                                 goto error;
 231
 232                         kdebug("Using ELF interpreter %s", interpreter_name);
 233
 234                         /* replace the program with the interpreter */
 235                         interpreter = open_exec(interpreter_name);
 236                         retval = PTR_ERR(interpreter);
 237                         if (IS_ERR(interpreter)) {
 238                                 interpreter = NULL;
 239                                 goto error;
 240                         }
 241
 242                         /*
 243                          * If the binary is not readable then enforce
 244                          * mm->dumpable = 0 regardless of the interpreter's
 245                          * permissions.
 246                          */
 247                         if (file_permission(interpreter, MAY_READ) < 0)
 248                                 bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
 249
 250                         retval = kernel_read(interpreter, 0, bprm->buf,
 251                                              BINPRM_BUF_SIZE);
 252                         if (unlikely(retval != BINPRM_BUF_SIZE)) {
 253                                 if (retval >= 0)
 254                                         retval = -ENOEXEC;
 255                                 goto error;
 256                         }
 257
 258                         interp_params.hdr = *((struct elfhdr *) bprm->buf);
 259                         break;
 260
 261                 case PT_LOAD:
 262 #ifdef CONFIG_MMU
 263                         if (exec_params.load_addr == 0)
 264                                 exec_params.load_addr = phdr->p_vaddr;
 265 #endif
 266                         break;
 267                 }
 268
 269         }
 270
 271         if (elf_check_const_displacement(&exec_params.hdr))
 272                 exec_params.flags |= ELF_FDPIC_FLAG_CONSTDISP;
 273
 274         /* perform insanity checks on the interpreter */
 275         if (interpreter_name) {
 276                 retval = -ELIBBAD;
 277                 if (!is_elf_fdpic(&interp_params.hdr, interpreter))
 278                         goto error;
 279
 280                 interp_params.flags = ELF_FDPIC_FLAG_PRESENT;
 281
 282                 /* read the interpreter's program header table */
 283                 retval = elf_fdpic_fetch_phdrs(&interp_params, interpreter);
 284                 if (retval < 0)
 285                         goto error;
 286         }
 287
 288         stack_size = exec_params.stack_size;
 289         if (exec_params.flags & ELF_FDPIC_FLAG_EXEC_STACK)
 290                 executable_stack = EXSTACK_ENABLE_X;
 291         else if (exec_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK)
 292                 executable_stack = EXSTACK_DISABLE_X;
 293         else
 294                 executable_stack = EXSTACK_DEFAULT;
 295
 296         if (stack_size == 0) {
 297                 stack_size = interp_params.stack_size;
 298                 if (interp_params.flags & ELF_FDPIC_FLAG_EXEC_STACK)
 299                         executable_stack = EXSTACK_ENABLE_X;
 300                 else if (interp_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK)
 301                         executable_stack = EXSTACK_DISABLE_X;
 302                 else
 303                         executable_stack = EXSTACK_DEFAULT;
 304         }
 305
 306         retval = -ENOEXEC;
 307         if (stack_size == 0)
 308                 goto error;
 309
 310         if (elf_check_const_displacement(&interp_params.hdr))
 311                 interp_params.flags |= ELF_FDPIC_FLAG_CONSTDISP;
 312
 313         /* flush all traces of the currently running executable */
 314         retval = flush_old_exec(bprm);
 315         if (retval)
 316                 goto error;
 317
 318         /* there's now no turning back... the old userspace image is dead,
 319          * defunct, deceased, etc. after this point we have to exit via
 320          * error_kill */
 321         set_personality(PER_LINUX_FDPIC);
 322         if (elf_read_implies_exec(&exec_params.hdr, executable_stack))
 323                 current->personality |= READ_IMPLIES_EXEC;
 324
 325         setup_new_exec(bprm);
 326
 327         set_binfmt(&elf_fdpic_format);
 328
 329         current->mm->start_code = 0;
 330         current->mm->end_code = 0;
 331         current->mm->start_stack = 0;
 332         current->mm->start_data = 0;
 333         current->mm->end_data = 0;
 334         current->mm->context.exec_fdpic_loadmap = 0;
 335         current->mm->context.interp_fdpic_loadmap = 0;
 336
 337         current->flags &= ~PF_FORKNOEXEC;
 338
 339 #ifdef CONFIG_MMU
 340         elf_fdpic_arch_lay_out_mm(&exec_params,
 341                                   &interp_params,
 342                                   &current->mm->start_stack,
 343                                   &current->mm->start_brk);
 344
 345         retval = setup_arg_pages(bprm, current->mm->start_stack,
 346                                  executable_stack);
 347         if (retval < 0) {
 348                 send_sig(SIGKILL, current, 0);
 349                 goto error_kill;
 350         }
 351 #endif
 352
 353         /* load the executable and interpreter into memory */
 354         retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm,
 355                                     "executable");
 356         if (retval < 0)
 357                 goto error_kill;
 358
 359         if (interpreter_name) {
 360                 retval = elf_fdpic_map_file(&interp_params, interpreter,
 361                                             current->mm, "interpreter");
 362                 if (retval < 0) {
 363                         printk(KERN_ERR "Unable to load interpreter\n");
 364                         goto error_kill;
 365                 }
 366
 367                 allow_write_access(interpreter);
 368                 fput(interpreter);
 369                 interpreter = NULL;
 370         }
 371
 372 #ifdef CONFIG_MMU
 373         if (!current->mm->start_brk)
 374                 current->mm->start_brk = current->mm->end_data;
 375
 376         current->mm->brk = current->mm->start_brk =
 377                 PAGE_ALIGN(current->mm->start_brk);
 378
 379 #else
 380         /* create a stack and brk area big enough for everyone
 381          * - the brk heap starts at the bottom and works up
 382          * - the stack starts at the top and works down
 383          */
 384         stack_size = (stack_size + PAGE_SIZE - 1) & PAGE_MASK;
 385         if (stack_size < PAGE_SIZE * 2)
 386                 stack_size = PAGE_SIZE * 2;
 387
 388         stack_prot = PROT_READ | PROT_WRITE;
 389         if (executable_stack == EXSTACK_ENABLE_X ||
 390             (executable_stack == EXSTACK_DEFAULT && VM_STACK_FLAGS & VM_EXEC))
 391                 stack_prot |= PROT_EXEC;
 392
 393         down_write(&current->mm->mmap_sem);
 394         current->mm->start_brk = do_mmap(NULL, 0, stack_size, stack_prot,
 395                                          MAP_PRIVATE | MAP_ANONYMOUS |
 396                                          MAP_UNINITIALIZED | MAP_GROWSDOWN,
 397                                          0);
 398
 399         if (IS_ERR_VALUE(current->mm->start_brk)) {
 400                 up_write(&current->mm->mmap_sem);
 401                 retval = current->mm->start_brk;
 402                 current->mm->start_brk = 0;
 403                 goto error_kill;
 404         }
 405
 406         up_write(&current->mm->mmap_sem);
 407
 408         current->mm->brk = current->mm->start_brk;
 409         current->mm->context.end_brk = current->mm->start_brk;
 410         current->mm->context.end_brk +=
 411                 (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0;
 412         current->mm->start_stack = current->mm->start_brk + stack_size;
 413 #endif
 414
 415         install_exec_creds(bprm);
 416         current->flags &= ~PF_FORKNOEXEC;
 417         if (create_elf_fdpic_tables(bprm, current->mm,
 418                                     &exec_params, &interp_params) < 0)
 419                 goto error_kill;
 420
 421         kdebug("- start_code  %lx", current->mm->start_code);
 422         kdebug("- end_code    %lx", current->mm->end_code);
 423         kdebug("- start_data  %lx", current->mm->start_data);
 424         kdebug("- end_data    %lx", current->mm->end_data);
 425         kdebug("- start_brk   %lx", current->mm->start_brk);
 426         kdebug("- brk         %lx", current->mm->brk);
 427         kdebug("- start_stack %lx", current->mm->start_stack);
 428
 429 #ifdef ELF_FDPIC_PLAT_INIT
 430         /*
 431          * The ABI may specify that certain registers be set up in special
 432          * ways (on i386 %edx is the address of a DT_FINI function, for
 433          * example.  This macro performs whatever initialization to
 434          * the regs structure is required.
 435          */
 436         dynaddr = interp_params.dynamic_addr ?: exec_params.dynamic_addr;
 437         ELF_FDPIC_PLAT_INIT(regs, exec_params.map_addr, interp_params.map_addr,
 438                             dynaddr);
 439 #endif
 440
 441         /* everything is now ready... get the userspace context ready to roll */
 442         entryaddr = interp_params.entry_addr ?: exec_params.entry_addr;
 443         start_thread(regs, entryaddr, current->mm->start_stack);
 444
 445         retval = 0;
 446
 447 error:
 448         if (interpreter) {
 449                 allow_write_access(interpreter);
 450                 fput(interpreter);
 451         }
 452         kfree(interpreter_name);
 453         kfree(exec_params.phdrs);
 454         kfree(exec_params.loadmap);
 455         kfree(interp_params.phdrs);
 456         kfree(interp_params.loadmap);
 457         return retval;
 458
 459         /* unrecoverable error - kill the process */
 460 error_kill:
 461         send_sig(SIGSEGV, current, 0);
 462         goto error;
 463
 464 }
 465
 466 /*****************************************************************************/
 467
 468 #ifndef ELF_BASE_PLATFORM
 469 /*
 470  * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture.
 471  * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value
 472  * will be copied to the user stack in the same manner as AT_PLATFORM.
 473  */
 474 #define ELF_BASE_PLATFORM NULL
 475 #endif
 476
 477 /*
 478  * present useful information to the program by shovelling it onto the new
 479  * process's stack
 480  */
 481 static int create_elf_fdpic_tables(struct linux_binprm *bprm,
 482                                    struct mm_struct *mm,
 483                                    struct elf_fdpic_params *exec_params,
 484                                    struct elf_fdpic_params *interp_params)
 485 {
 486         const struct cred *cred = current_cred();
 487         unsigned long sp, csp, nitems;
 488         elf_caddr_t __user *argv, *envp;
 489         size_t platform_len = 0, len;
 490         char *k_platform, *k_base_platform;
 491         char __user *u_platform, *u_base_platform, *p;
 492         long hwcap;
 493         int loop;
 494         int nr; /* reset for each csp adjustment */
 495
 496 #ifdef CONFIG_MMU
 497         /* In some cases (e.g. Hyper-Threading), we want to avoid L1 evictions
 498          * by the processes running on the same package. One thing we can do is
 499          * to shuffle the initial stack for them, so we give the architecture
 500          * an opportunity to do so here.
 501          */
 502         sp = arch_align_stack(bprm->p);
 503 #else
 504         sp = mm->start_stack;
 505
 506         /* stack the program arguments and environment */
 507         if (elf_fdpic_transfer_args_to_stack(bprm, &sp) < 0)
 508                 return -EFAULT;
 509 #endif
 510
 511         hwcap = ELF_HWCAP;
 512
 513         /*
 514          * If this architecture has a platform capability string, copy it
 515          * to userspace.  In some cases (Sparc), this info is impossible
 516          * for userspace to get any other way, in others (i386) it is
 517          * merely difficult.
 518          */
 519         k_platform = ELF_PLATFORM;
 520         u_platform = NULL;
 521
 522         if (k_platform) {
 523                 platform_len = strlen(k_platform) + 1;
 524                 sp -= platform_len;
 525                 u_platform = (char __user *) sp;
 526                 if (__copy_to_user(u_platform, k_platform, platform_len) != 0)
 527                         return -EFAULT;
 528         }
 529
 530         /*
 531          * If this architecture has a "base" platform capability
 532          * string, copy it to userspace.
 533          */
 534         k_base_platform = ELF_BASE_PLATFORM;
 535         u_base_platform = NULL;
 536
 537         if (k_base_platform) {
 538                 platform_len = strlen(k_base_platform) + 1;
 539                 sp -= platform_len;
 540                 u_base_platform = (char __user *) sp;
 541                 if (__copy_to_user(u_base_platform, k_base_platform, platform_len) != 0)
 542                         return -EFAULT;
 543         }
 544
 545         sp &= ~7UL;
 546
 547         /* stack the load map(s) */
 548         len = sizeof(struct elf32_fdpic_loadmap);
 549         len += sizeof(struct elf32_fdpic_loadseg) * exec_params->loadmap->nsegs;
 550         sp = (sp - len) & ~7UL;
 551         exec_params->map_addr = sp;
 552
 553         if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0)
 554                 return -EFAULT;
 555
 556         current->mm->context.exec_fdpic_loadmap = (unsigned long) sp;
 557
 558         if (interp_params->loadmap) {
 559                 len = sizeof(struct elf32_fdpic_loadmap);
 560                 len += sizeof(struct elf32_fdpic_loadseg) *
 561                         interp_params->loadmap->nsegs;
 562                 sp = (sp - len) & ~7UL;
 563                 interp_params->map_addr = sp;
 564
 565                 if (copy_to_user((void __user *) sp, interp_params->loadmap,
 566                                  len) != 0)
 567                         return -EFAULT;
 568
 569                 current->mm->context.interp_fdpic_loadmap = (unsigned long) sp;
 570         }
 571
 572         /* force 16 byte _final_ alignment here for generality */
 573 #define DLINFO_ITEMS 15
 574
 575         nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) +
 576                 (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH;
 577
 578         if (bprm->interp_flags & BINPRM_FLAGS_EXECFD)
 579                 nitems++;
 580
 581         csp = sp;
 582         sp -= nitems * 2 * sizeof(unsigned long);
 583         sp -= (bprm->envc + 1) * sizeof(char *);        /* envv[] */
 584         sp -= (bprm->argc + 1) * sizeof(char *);        /* argv[] */
 585         sp -= 1 * sizeof(unsigned long);                /* argc */
 586
 587         csp -= sp & 15UL;
 588         sp -= sp & 15UL;
 589
 590         /* put the ELF interpreter info on the stack */
 591 #define NEW_AUX_ENT(id, val)                                            \
 592         do {                                                            \
 593                 struct { unsigned long _id, _val; } __user *ent;        \
 594                                                                         \
 595                 ent = (void __user *) csp;                              \
 596                 __put_user((id), &ent[nr]._id);                         \
 597                 __put_user((val), &ent[nr]._val);                       \
 598                 nr++;                                                   \
 599         } while (0)
 600
 601         nr = 0;
 602         csp -= 2 * sizeof(unsigned long);
 603         NEW_AUX_ENT(AT_NULL, 0);
 604         if (k_platform) {
 605                 nr = 0;
 606                 csp -= 2 * sizeof(unsigned long);
 607                 NEW_AUX_ENT(AT_PLATFORM,
 608                             (elf_addr_t) (unsigned long) u_platform);
 609         }
 610
 611         if (k_base_platform) {
 612                 nr = 0;
 613                 csp -= 2 * sizeof(unsigned long);
 614                 NEW_AUX_ENT(AT_BASE_PLATFORM,
 615                             (elf_addr_t) (unsigned long) u_base_platform);
 616         }
 617
 618         if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) {
 619                 nr = 0;
 620                 csp -= 2 * sizeof(unsigned long);
 621                 NEW_AUX_ENT(AT_EXECFD, bprm->interp_data);
 622         }
 623
 624         nr = 0;
 625         csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long);
 626         NEW_AUX_ENT(AT_HWCAP,   hwcap);
 627         NEW_AUX_ENT(AT_PAGESZ,  PAGE_SIZE);
 628         NEW_AUX_ENT(AT_CLKTCK,  CLOCKS_PER_SEC);
 629         NEW_AUX_ENT(AT_PHDR,    exec_params->ph_addr);
 630         NEW_AUX_ENT(AT_PHENT,   sizeof(struct elf_phdr));
 631         NEW_AUX_ENT(AT_PHNUM,   exec_params->hdr.e_phnum);
 632         NEW_AUX_ENT(AT_BASE,    interp_params->elfhdr_addr);
 633         NEW_AUX_ENT(AT_FLAGS,   0);
 634         NEW_AUX_ENT(AT_ENTRY,   exec_params->entry_addr);
 635         NEW_AUX_ENT(AT_UID,     (elf_addr_t) cred->uid);
 636         NEW_AUX_ENT(AT_EUID,    (elf_addr_t) cred->euid);
 637         NEW_AUX_ENT(AT_GID,     (elf_addr_t) cred->gid);
 638         NEW_AUX_ENT(AT_EGID,    (elf_addr_t) cred->egid);
 639         NEW_AUX_ENT(AT_SECURE,  security_bprm_secureexec(bprm));
 640         NEW_AUX_ENT(AT_EXECFN,  bprm->exec);
 641
 642 #ifdef ARCH_DLINFO
 643         nr = 0;
 644         csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long);
 645
 646         /* ARCH_DLINFO must come last so platform specific code can enforce
 647          * special alignment requirements on the AUXV if necessary (eg. PPC).
 648          */
 649         ARCH_DLINFO;
 650 #endif
 651 #undef NEW_AUX_ENT
 652
 653         /* allocate room for argv[] and envv[] */
 654         csp -= (bprm->envc + 1) * sizeof(elf_caddr_t);
 655         envp = (elf_caddr_t __user *) csp;
 656         csp -= (bprm->argc + 1) * sizeof(elf_caddr_t);
 657         argv = (elf_caddr_t __user *) csp;
 658
 659         /* stack argc */
 660         csp -= sizeof(unsigned long);
 661         __put_user(bprm->argc, (unsigned long __user *) csp);
 662
 663         BUG_ON(csp != sp);
 664
 665         /* fill in the argv[] array */
 666 #ifdef CONFIG_MMU
 667         current->mm->arg_start = bprm->p;
 668 #else
 669         current->mm->arg_start = current->mm->start_stack -
 670                 (MAX_ARG_PAGES * PAGE_SIZE - bprm->p);
 671 #endif
 672
 673         p = (char __user *) current->mm->arg_start;
 674         for (loop = bprm->argc; loop > 0; loop--) {
 675                 __put_user((elf_caddr_t) p, argv++);
 676                 len = strnlen_user(p, MAX_ARG_STRLEN);
 677                 if (!len || len > MAX_ARG_STRLEN)
 678                         return -EINVAL;
 679                 p += len;
 680         }
 681         __put_user(NULL, argv);
 682         current->mm->arg_end = (unsigned long) p;
 683
 684         /* fill in the envv[] array */
 685         current->mm->env_start = (unsigned long) p;
 686         for (loop = bprm->envc; loop > 0; loop--) {
 687                 __put_user((elf_caddr_t)(unsigned long) p, envp++);
 688                 len = strnlen_user(p, MAX_ARG_STRLEN);
 689                 if (!len || len > MAX_ARG_STRLEN)
 690                         return -EINVAL;
 691                 p += len;
 692         }
 693         __put_user(NULL, envp);
 694         current->mm->env_end = (unsigned long) p;
 695
 696         mm->start_stack = (unsigned long) sp;
 697         return 0;
 698 }
 699
 700 /*****************************************************************************/
 701 /*
 702  * transfer the program arguments and environment from the holding pages onto
 703  * the stack
 704  */
 705 #ifndef CONFIG_MMU
 706 static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm,
 707                                             unsigned long *_sp)
 708 {
 709         unsigned long index, stop, sp;
 710         char *src;
 711         int ret = 0;
 712
 713         stop = bprm->p >> PAGE_SHIFT;
 714         sp = *_sp;
 715
 716         for (index = MAX_ARG_PAGES - 1; index >= stop; index--) {
 717                 src = kmap(bprm->page[index]);
 718                 sp -= PAGE_SIZE;
 719                 if (copy_to_user((void *) sp, src, PAGE_SIZE) != 0)
 720                         ret = -EFAULT;
 721                 kunmap(bprm->page[index]);
 722                 if (ret < 0)
 723                         goto out;
 724         }
 725
 726         *_sp = (*_sp - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p)) & ~15;
 727
 728 out:
 729         return ret;
 730 }
 731 #endif
 732
 733 /*****************************************************************************/
 734 /*
 735  * load the appropriate binary image (executable or interpreter) into memory
 736  * - we assume no MMU is available
 737  * - if no other PIC bits are set in params->hdr->e_flags
 738  *   - we assume that the LOADable segments in the binary are independently relocatable
 739  *   - we assume R/O executable segments are shareable
 740  * - else
 741  *   - we assume the loadable parts of the image to require fixed displacement
 742  *   - the image is not shareable
 743  */
 744 static int elf_fdpic_map_file(struct elf_fdpic_params *params,
 745                               struct file *file,
 746                               struct mm_struct *mm,
 747                               const char *what)
 748 {
 749         struct elf32_fdpic_loadmap *loadmap;
 750 #ifdef CONFIG_MMU
 751         struct elf32_fdpic_loadseg *mseg;
 752 #endif
 753         struct elf32_fdpic_loadseg *seg;
 754         struct elf32_phdr *phdr;
 755         unsigned long load_addr, stop;
 756         unsigned nloads, tmp;
 757         size_t size;
 758         int loop, ret;
 759
 760         /* allocate a load map table */
 761         nloads = 0;
 762         for (loop = 0; loop < params->hdr.e_phnum; loop++)
 763                 if (params->phdrs[loop].p_type == PT_LOAD)
 764                         nloads++;
 765
 766         if (nloads == 0)
 767                 return -ELIBBAD;
 768
 769         size = sizeof(*loadmap) + nloads * sizeof(*seg);
 770         loadmap = kzalloc(size, GFP_KERNEL);
 771         if (!loadmap)
 772                 return -ENOMEM;
 773
 774         params->loadmap = loadmap;
 775
 776         loadmap->version = ELF32_FDPIC_LOADMAP_VERSION;
 777         loadmap->nsegs = nloads;
 778
 779         load_addr = params->load_addr;
 780         seg = loadmap->segs;
 781
 782         /* map the requested LOADs into the memory space */
 783         switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) {
 784         case ELF_FDPIC_FLAG_CONSTDISP:
 785         case ELF_FDPIC_FLAG_CONTIGUOUS:
 786 #ifndef CONFIG_MMU
 787                 ret = elf_fdpic_map_file_constdisp_on_uclinux(params, file, mm);
 788                 if (ret < 0)
 789                         return ret;
 790                 break;
 791 #endif
 792         default:
 793                 ret = elf_fdpic_map_file_by_direct_mmap(params, file, mm);
 794                 if (ret < 0)
 795                         return ret;
 796                 break;
 797         }
 798
 799         /* map the entry point */
 800         if (params->hdr.e_entry) {
 801                 seg = loadmap->segs;
 802                 for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
 803                         if (params->hdr.e_entry >= seg->p_vaddr &&
 804                             params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) {
 805                                 params->entry_addr =
 806                                         (params->hdr.e_entry - seg->p_vaddr) +
 807                                         seg->addr;
 808                                 break;
 809                         }
 810                 }
 811         }
 812
 813         /* determine where the program header table has wound up if mapped */
 814         stop = params->hdr.e_phoff;
 815         stop += params->hdr.e_phnum * sizeof (struct elf_phdr);
 816         phdr = params->phdrs;
 817
 818         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
 819                 if (phdr->p_type != PT_LOAD)
 820                         continue;
 821
 822                 if (phdr->p_offset > params->hdr.e_phoff ||
 823                     phdr->p_offset + phdr->p_filesz < stop)
 824                         continue;
 825
 826                 seg = loadmap->segs;
 827                 for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
 828                         if (phdr->p_vaddr >= seg->p_vaddr &&
 829                             phdr->p_vaddr + phdr->p_filesz <=
 830                             seg->p_vaddr + seg->p_memsz) {
 831                                 params->ph_addr =
 832                                         (phdr->p_vaddr - seg->p_vaddr) +
 833                                         seg->addr +
 834                                         params->hdr.e_phoff - phdr->p_offset;
 835                                 break;
 836                         }
 837                 }
 838                 break;
 839         }
 840
 841         /* determine where the dynamic section has wound up if there is one */
 842         phdr = params->phdrs;
 843         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
 844                 if (phdr->p_type != PT_DYNAMIC)
 845                         continue;
 846
 847                 seg = loadmap->segs;
 848                 for (loop = loadmap->nsegs; loop > 0; loop--, seg++) {
 849                         if (phdr->p_vaddr >= seg->p_vaddr &&
 850                             phdr->p_vaddr + phdr->p_memsz <=
 851                             seg->p_vaddr + seg->p_memsz) {
 852                                 params->dynamic_addr =
 853                                         (phdr->p_vaddr - seg->p_vaddr) +
 854                                         seg->addr;
 855
 856                                 /* check the dynamic section contains at least
 857                                  * one item, and that the last item is a NULL
 858                                  * entry */
 859                                 if (phdr->p_memsz == 0 ||
 860                                     phdr->p_memsz % sizeof(Elf32_Dyn) != 0)
 861                                         goto dynamic_error;
 862
 863                                 tmp = phdr->p_memsz / sizeof(Elf32_Dyn);
 864                                 if (((Elf32_Dyn *)
 865                                      params->dynamic_addr)[tmp - 1].d_tag != 0)
 866                                         goto dynamic_error;
 867                                 break;
 868                         }
 869                 }
 870                 break;
 871         }
 872
 873         /* now elide adjacent segments in the load map on MMU linux
 874          * - on uClinux the holes between may actually be filled with system
 875          *   stuff or stuff from other processes
 876          */
 877 #ifdef CONFIG_MMU
 878         nloads = loadmap->nsegs;
 879         mseg = loadmap->segs;
 880         seg = mseg + 1;
 881         for (loop = 1; loop < nloads; loop++) {
 882                 /* see if we have a candidate for merging */
 883                 if (seg->p_vaddr - mseg->p_vaddr == seg->addr - mseg->addr) {
 884                         load_addr = PAGE_ALIGN(mseg->addr + mseg->p_memsz);
 885                         if (load_addr == (seg->addr & PAGE_MASK)) {
 886                                 mseg->p_memsz +=
 887                                         load_addr -
 888                                         (mseg->addr + mseg->p_memsz);
 889                                 mseg->p_memsz += seg->addr & ~PAGE_MASK;
 890                                 mseg->p_memsz += seg->p_memsz;
 891                                 loadmap->nsegs--;
 892                                 continue;
 893                         }
 894                 }
 895
 896                 mseg++;
 897                 if (mseg != seg)
 898                         *mseg = *seg;
 899         }
 900 #endif
 901
 902         kdebug("Mapped Object [%s]:", what);
 903         kdebug("- elfhdr   : %lx", params->elfhdr_addr);
 904         kdebug("- entry    : %lx", params->entry_addr);
 905         kdebug("- PHDR[]   : %lx", params->ph_addr);
 906         kdebug("- DYNAMIC[]: %lx", params->dynamic_addr);
 907         seg = loadmap->segs;
 908         for (loop = 0; loop < loadmap->nsegs; loop++, seg++)
 909                 kdebug("- LOAD[%d] : %08x-%08x [va=%x ms=%x]",
 910                        loop,
 911                        seg->addr, seg->addr + seg->p_memsz - 1,
 912                        seg->p_vaddr, seg->p_memsz);
 913
 914         return 0;
 915
 916 dynamic_error:
 917         printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu)\n",
 918                what, file->f_path.dentry->d_inode->i_ino);
 919         return -ELIBBAD;
 920 }
 921
 922 /*****************************************************************************/
 923 /*
 924  * map a file with constant displacement under uClinux
 925  */
 926 #ifndef CONFIG_MMU
 927 static int elf_fdpic_map_file_constdisp_on_uclinux(
 928         struct elf_fdpic_params *params,
 929         struct file *file,
 930         struct mm_struct *mm)
 931 {
 932         struct elf32_fdpic_loadseg *seg;
 933         struct elf32_phdr *phdr;
 934         unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags;
 935         loff_t fpos;
 936         int loop, ret;
 937
 938         load_addr = params->load_addr;
 939         seg = params->loadmap->segs;
 940
 941         /* determine the bounds of the contiguous overall allocation we must
 942          * make */
 943         phdr = params->phdrs;
 944         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
 945                 if (params->phdrs[loop].p_type != PT_LOAD)
 946                         continue;
 947
 948                 if (base > phdr->p_vaddr)
 949                         base = phdr->p_vaddr;
 950                 if (top < phdr->p_vaddr + phdr->p_memsz)
 951                         top = phdr->p_vaddr + phdr->p_memsz;
 952         }
 953
 954         /* allocate one big anon block for everything */
 955         mflags = MAP_PRIVATE;
 956         if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE)
 957                 mflags |= MAP_EXECUTABLE;
 958
 959         down_write(&mm->mmap_sem);
 960         maddr = do_mmap(NULL, load_addr, top - base,
 961                         PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0);
 962         up_write(&mm->mmap_sem);
 963         if (IS_ERR_VALUE(maddr))
 964                 return (int) maddr;
 965
 966         if (load_addr != 0)
 967                 load_addr += PAGE_ALIGN(top - base);
 968
 969         /* and then load the file segments into it */
 970         phdr = params->phdrs;
 971         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
 972                 if (params->phdrs[loop].p_type != PT_LOAD)
 973                         continue;
 974
 975                 fpos = phdr->p_offset;
 976
 977                 seg->addr = maddr + (phdr->p_vaddr - base);
 978                 seg->p_vaddr = phdr->p_vaddr;
 979                 seg->p_memsz = phdr->p_memsz;
 980
 981                 ret = file->f_op->read(file, (void *) seg->addr,
 982                                        phdr->p_filesz, &fpos);
 983                 if (ret < 0)
 984                         return ret;
 985
 986                 /* map the ELF header address if in this segment */
 987                 if (phdr->p_offset == 0)
 988                         params->elfhdr_addr = seg->addr;
 989
 990                 /* clear any space allocated but not loaded */
 991                 if (phdr->p_filesz < phdr->p_memsz) {
 992                         ret = clear_user((void *) (seg->addr + phdr->p_filesz),
 993                                          phdr->p_memsz - phdr->p_filesz);
 994                         if (ret)
 995                                 return ret;
 996                 }
 997
 998                 if (mm) {
 999                         if (phdr->p_flags & PF_X) {
1000                                 if (!mm->start_code) {
1001                                         mm->start_code = seg->addr;
1002                                         mm->end_code = seg->addr +
1003                                                 phdr->p_memsz;
1004                                 }
1005                         } else if (!mm->start_data) {
1006                                 mm->start_data = seg->addr;
1007 #ifndef CONFIG_MMU
1008                                 mm->end_data = seg->addr + phdr->p_memsz;
1009 #endif
1010                         }
1011
1012 #ifdef CONFIG_MMU
1013                         if (seg->addr + phdr->p_memsz > mm->end_data)
1014                                 mm->end_data = seg->addr + phdr->p_memsz;
1015 #endif
1016                 }
1017
1018                 seg++;
1019         }
1020
1021         return 0;
1022 }
1023 #endif
1024
1025 /*****************************************************************************/
1026 /*
1027  * map a binary by direct mmap() of the individual PT_LOAD segments
1028  */
1029 static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params,
1030                                              struct file *file,
1031                                              struct mm_struct *mm)
1032 {
1033         struct elf32_fdpic_loadseg *seg;
1034         struct elf32_phdr *phdr;
1035         unsigned long load_addr, delta_vaddr;
1036         int loop, dvset, ret;
1037
1038         load_addr = params->load_addr;
1039         delta_vaddr = 0;
1040         dvset = 0;
1041
1042         seg = params->loadmap->segs;
1043
1044         /* deal with each load segment separately */
1045         phdr = params->phdrs;
1046         for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) {
1047                 unsigned long maddr, disp, excess, excess1;
1048                 int prot = 0, flags;
1049
1050                 if (phdr->p_type != PT_LOAD)
1051                         continue;
1052
1053                 kdebug("[LOAD] va=%lx of=%lx fs=%lx ms=%lx",
1054                        (unsigned long) phdr->p_vaddr,
1055                        (unsigned long) phdr->p_offset,
1056                        (unsigned long) phdr->p_filesz,
1057                        (unsigned long) phdr->p_memsz);
1058
1059                 /* determine the mapping parameters */
1060                 if (phdr->p_flags & PF_R) prot |= PROT_READ;
1061                 if (phdr->p_flags & PF_W) prot |= PROT_WRITE;
1062                 if (phdr->p_flags & PF_X) prot |= PROT_EXEC;
1063
1064                 flags = MAP_PRIVATE | MAP_DENYWRITE;
1065                 if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE)
1066                         flags |= MAP_EXECUTABLE;
1067
1068                 maddr = 0;
1069
1070                 switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) {
1071                 case ELF_FDPIC_FLAG_INDEPENDENT:
1072                         /* PT_LOADs are independently locatable */
1073                         break;
1074
1075                 case ELF_FDPIC_FLAG_HONOURVADDR:
1076                         /* the specified virtual address must be honoured */
1077                         maddr = phdr->p_vaddr;
1078                         flags |= MAP_FIXED;
1079                         break;
1080
1081                 case ELF_FDPIC_FLAG_CONSTDISP:
1082                         /* constant displacement
1083                          * - can be mapped anywhere, but must be mapped as a
1084                          *   unit
1085                          */
1086                         if (!dvset) {
1087                                 maddr = load_addr;
1088                                 delta_vaddr = phdr->p_vaddr;
1089                                 dvset = 1;
1090                         } else {
1091                                 maddr = load_addr + phdr->p_vaddr - delta_vaddr;
1092                                 flags |= MAP_FIXED;
1093                         }
1094                         break;
1095
1096                 case ELF_FDPIC_FLAG_CONTIGUOUS:
1097                         /* contiguity handled later */
1098                         break;
1099
1100                 default:
1101                         BUG();
1102                 }
1103
1104                 maddr &= PAGE_MASK;
1105
1106                 /* create the mapping */
1107                 disp = phdr->p_vaddr & ~PAGE_MASK;
1108                 down_write(&mm->mmap_sem);
1109                 maddr = do_mmap(file, maddr, phdr->p_memsz + disp, prot, flags,
1110                                 phdr->p_offset - disp);
1111                 up_write(&mm->mmap_sem);
1112
1113                 kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx",
1114                        loop, phdr->p_memsz + disp, prot, flags,
1115                        phdr->p_offset - disp, maddr);
1116
1117                 if (IS_ERR_VALUE(maddr))
1118                         return (int) maddr;
1119
1120                 if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) ==
1121                     ELF_FDPIC_FLAG_CONTIGUOUS)
1122                         load_addr += PAGE_ALIGN(phdr->p_memsz + disp);
1123
1124                 seg->addr = maddr + disp;
1125                 seg->p_vaddr = phdr->p_vaddr;
1126                 seg->p_memsz = phdr->p_memsz;
1127
1128                 /* map the ELF header address if in this segment */
1129                 if (phdr->p_offset == 0)
1130                         params->elfhdr_addr = seg->addr;
1131
1132                 /* clear the bit between beginning of mapping and beginning of
1133                  * PT_LOAD */
1134                 if (prot & PROT_WRITE && disp > 0) {
1135                         kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp);
1136                         ret = clear_user((void __user *) maddr, disp);
1137                         if (ret)
1138                                 return ret;
1139                         maddr += disp;
1140                 }
1141
1142                 /* clear any space allocated but not loaded
1143                  * - on uClinux we can just clear the lot
1144                  * - on MMU linux we'll get a SIGBUS beyond the last page
1145                  *   extant in the file
1146                  */
1147                 excess = phdr->p_memsz - phdr->p_filesz;
1148                 excess1 = PAGE_SIZE - ((maddr + phdr->p_filesz) & ~PAGE_MASK);
1149
1150 #ifdef CONFIG_MMU
1151                 if (excess > excess1) {
1152                         unsigned long xaddr = maddr + phdr->p_filesz + excess1;
1153                         unsigned long xmaddr;
1154
1155                         flags |= MAP_FIXED | MAP_ANONYMOUS;
1156                         down_write(&mm->mmap_sem);
1157                         xmaddr = do_mmap(NULL, xaddr, excess - excess1,
1158                                          prot, flags, 0);
1159                         up_write(&mm->mmap_sem);
1160
1161                         kdebug("mmap[%d] <anon>"
1162                                " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx",
1163                                loop, xaddr, excess - excess1, prot, flags,
1164                                xmaddr);
1165
1166                         if (xmaddr != xaddr)
1167                                 return -ENOMEM;
1168                 }
1169
1170                 if (prot & PROT_WRITE && excess1 > 0) {
1171                         kdebug("clear[%d] ad=%lx sz=%lx",
1172                                loop, maddr + phdr->p_filesz, excess1);
1173                         ret = clear_user((void __user *) maddr + phdr->p_filesz,
1174                                          excess1);
1175                         if (ret)
1176                                 return ret;
1177                 }
1178
1179 #else
1180                 if (excess > 0) {
1181                         kdebug("clear[%d] ad=%lx sz=%lx",
1182                                loop, maddr + phdr->p_filesz, excess);
1183                         ret = clear_user((void *) maddr + phdr->p_filesz, excess);
1184                         if (ret)
1185                                 return ret;
1186                 }
1187 #endif
1188
1189                 if (mm) {
1190                         if (phdr->p_flags & PF_X) {
1191                                 if (!mm->start_code) {
1192                                         mm->start_code = maddr;
1193                                         mm->end_code = maddr + phdr->p_memsz;
1194                                 }
1195                         } else if (!mm->start_data) {
1196                                 mm->start_data = maddr;
1197                                 mm->end_data = maddr + phdr->p_memsz;
1198                         }
1199                 }
1200
1201                 seg++;
1202         }
1203
1204         return 0;
1205 }
1206
1207 /*****************************************************************************/
1208 /*
1209  * ELF-FDPIC core dumper
1210  *
1211  * Modelled on fs/exec.c:aout_core_dump()
1212  * Jeremy Fitzhardinge <jeremy@sw.oz.au>
1213  *
1214  * Modelled on fs/binfmt_elf.c core dumper
1215  */
1216 #ifdef CONFIG_ELF_CORE
1217
1218 /*
1219  * These are the only things you should do on a core-file: use only these
1220  * functions to write out all the necessary info.
1221  */
1222 static int dump_write(struct file *file, const void *addr, int nr)
1223 {
1224         return file->f_op->write(file, addr, nr, &file->f_pos) == nr;
1225 }
1226
1227 static int dump_seek(struct file *file, loff_t off)
1228 {
1229         if (file->f_op->llseek) {
1230                 if (file->f_op->llseek(file, off, SEEK_SET) != off)
1231                         return 0;
1232         } else {
1233                 file->f_pos = off;
1234         }
1235         return 1;
1236 }
1237
1238 /*
1239  * Decide whether a segment is worth dumping; default is yes to be
1240  * sure (missing info is worse than too much; etc).
1241  * Personally I'd include everything, and use the coredump limit...
1242  *
1243  * I think we should skip something. But I am not sure how. H.J.
1244  */
1245 static int maydump(struct vm_area_struct *vma, unsigned long mm_flags)
1246 {
1247         int dump_ok;
1248
1249         /* Do not dump I/O mapped devices or special mappings */
1250         if (vma->vm_flags & (VM_IO | VM_RESERVED)) {
1251                 kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags);
1252                 return 0;
1253         }
1254
1255         /* If we may not read the contents, don't allow us to dump
1256          * them either. "dump_write()" can't handle it anyway.
1257          */
1258         if (!(vma->vm_flags & VM_READ)) {
1259                 kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags);
1260                 return 0;
1261         }
1262
1263         /* By default, dump shared memory if mapped from an anonymous file. */
1264         if (vma->vm_flags & VM_SHARED) {
1265                 if (vma->vm_file->f_path.dentry->d_inode->i_nlink == 0) {
1266                         dump_ok = test_bit(MMF_DUMP_ANON_SHARED, &mm_flags);
1267                         kdcore("%08lx: %08lx: %s (share)", vma->vm_start,
1268                                vma->vm_flags, dump_ok ? "yes" : "no");
1269                         return dump_ok;
1270                 }
1271
1272                 dump_ok = test_bit(MMF_DUMP_MAPPED_SHARED, &mm_flags);
1273                 kdcore("%08lx: %08lx: %s (share)", vma->vm_start,
1274                        vma->vm_flags, dump_ok ? "yes" : "no");
1275                 return dump_ok;
1276         }
1277
1278 #ifdef CONFIG_MMU
1279         /* By default, if it hasn't been written to, don't write it out */
1280         if (!vma->anon_vma) {
1281                 dump_ok = test_bit(MMF_DUMP_MAPPED_PRIVATE, &mm_flags);
1282                 kdcore("%08lx: %08lx: %s (!anon)", vma->vm_start,
1283                        vma->vm_flags, dump_ok ? "yes" : "no");
1284                 return dump_ok;
1285         }
1286 #endif
1287
1288         dump_ok = test_bit(MMF_DUMP_ANON_PRIVATE, &mm_flags);
1289         kdcore("%08lx: %08lx: %s", vma->vm_start, vma->vm_flags,
1290                dump_ok ? "yes" : "no");
1291         return dump_ok;
1292 }
1293
1294 /* An ELF note in memory */
1295 struct memelfnote
1296 {
1297         const char *name;
1298         int type;
1299         unsigned int datasz;
1300         void *data;
1301 };
1302
1303 static int notesize(struct memelfnote *en)
1304 {
1305         int sz;
1306
1307         sz = sizeof(struct elf_note);
1308         sz += roundup(strlen(en->name) + 1, 4);
1309         sz += roundup(en->datasz, 4);
1310
1311         return sz;
1312 }
1313
1314 /* #define DEBUG */
1315
1316 #define DUMP_WRITE(addr, nr)    \
1317         do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
1318 #define DUMP_SEEK(off)  \
1319         do { if (!dump_seek(file, (off))) return 0; } while(0)
1320
1321 static int writenote(struct memelfnote *men, struct file *file)
1322 {
1323         struct elf_note en;
1324
1325         en.n_namesz = strlen(men->name) + 1;
1326         en.n_descsz = men->datasz;
1327         en.n_type = men->type;
1328
1329         DUMP_WRITE(&en, sizeof(en));
1330         DUMP_WRITE(men->name, en.n_namesz);
1331         /* XXX - cast from long long to long to avoid need for libgcc.a */
1332         DUMP_SEEK(roundup((unsigned long)file->f_pos, 4));      /* XXX */
1333         DUMP_WRITE(men->data, men->datasz);
1334         DUMP_SEEK(roundup((unsigned long)file->f_pos, 4));      /* XXX */
1335
1336         return 1;
1337 }
1338 #undef DUMP_WRITE
1339 #undef DUMP_SEEK
1340
1341 #define DUMP_WRITE(addr, nr)                            \
1342         if ((size += (nr)) > cprm->limit ||             \
1343             !dump_write(cprm->file, (addr), (nr)))      \
1344                 goto end_coredump;
1345
1346 static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs)
1347 {
1348         memcpy(elf->e_ident, ELFMAG, SELFMAG);
1349         elf->e_ident[EI_CLASS] = ELF_CLASS;
1350         elf->e_ident[EI_DATA] = ELF_DATA;
1351         elf->e_ident[EI_VERSION] = EV_CURRENT;
1352         elf->e_ident[EI_OSABI] = ELF_OSABI;
1353         memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
1354
1355         elf->e_type = ET_CORE;
1356         elf->e_machine = ELF_ARCH;
1357         elf->e_version = EV_CURRENT;
1358         elf->e_entry = 0;
1359         elf->e_phoff = sizeof(struct elfhdr);
1360         elf->e_shoff = 0;
1361         elf->e_flags = ELF_FDPIC_CORE_EFLAGS;
1362         elf->e_ehsize = sizeof(struct elfhdr);
1363         elf->e_phentsize = sizeof(struct elf_phdr);
1364         elf->e_phnum = segs;
1365         elf->e_shentsize = 0;
1366         elf->e_shnum = 0;
1367         elf->e_shstrndx = 0;
1368         return;
1369 }
1370
1371 static inline void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
1372 {
1373         phdr->p_type = PT_NOTE;
1374         phdr->p_offset = offset;
1375         phdr->p_vaddr = 0;
1376         phdr->p_paddr = 0;
1377         phdr->p_filesz = sz;
1378         phdr->p_memsz = 0;
1379         phdr->p_flags = 0;
1380         phdr->p_align = 0;
1381         return;
1382 }
1383
1384 static inline void fill_note(struct memelfnote *note, const char *name, int type,
1385                 unsigned int sz, void *data)
1386 {
1387         note->name = name;
1388         note->type = type;
1389         note->datasz = sz;
1390         note->data = data;
1391         return;
1392 }
1393
1394 /*
1395  * fill up all the fields in prstatus from the given task struct, except
1396  * registers which need to be filled up seperately.
1397  */
1398 static void fill_prstatus(struct elf_prstatus *prstatus,
1399                           struct task_struct *p, long signr)
1400 {
1401         prstatus->pr_info.si_signo = prstatus->pr_cursig = signr;
1402         prstatus->pr_sigpend = p->pending.signal.sig[0];
1403         prstatus->pr_sighold = p->blocked.sig[0];
1404         rcu_read_lock();
1405         prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent));
1406         rcu_read_unlock();
1407         prstatus->pr_pid = task_pid_vnr(p);
1408         prstatus->pr_pgrp = task_pgrp_vnr(p);
1409         prstatus->pr_sid = task_session_vnr(p);
1410         if (thread_group_leader(p)) {
1411                 struct task_cputime cputime;
1412
1413                 /*
1414                  * This is the record for the group leader.  It shows the
1415                  * group-wide total, not its individual thread total.
1416                  */
1417                 thread_group_cputime(p, &cputime);
1418                 cputime_to_timeval(cputime.utime, &prstatus->pr_utime);
1419                 cputime_to_timeval(cputime.stime, &prstatus->pr_stime);
1420         } else {
1421                 cputime_to_timeval(p->utime, &prstatus->pr_utime);
1422                 cputime_to_timeval(p->stime, &prstatus->pr_stime);
1423         }
1424         cputime_to_timeval(p->signal->cutime, &prstatus->pr_cutime);
1425         cputime_to_timeval(p->signal->cstime, &prstatus->pr_cstime);
1426
1427         prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap;
1428         prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap;
1429 }
1430
1431 static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p,
1432                        struct mm_struct *mm)
1433 {
1434         const struct cred *cred;
1435         unsigned int i, len;
1436
1437         /* first copy the parameters from user space */
1438         memset(psinfo, 0, sizeof(struct elf_prpsinfo));
1439
1440         len = mm->arg_end - mm->arg_start;
1441         if (len >= ELF_PRARGSZ)
1442                 len = ELF_PRARGSZ - 1;
1443         if (copy_from_user(&psinfo->pr_psargs,
1444                            (const char __user *) mm->arg_start, len))
1445                 return -EFAULT;
1446         for (i = 0; i < len; i++)
1447                 if (psinfo->pr_psargs[i] == 0)
1448                         psinfo->pr_psargs[i] = ' ';
1449         psinfo->pr_psargs[len] = 0;
1450
1451         rcu_read_lock();
1452         psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent));
1453         rcu_read_unlock();
1454         psinfo->pr_pid = task_pid_vnr(p);
1455         psinfo->pr_pgrp = task_pgrp_vnr(p);
1456         psinfo->pr_sid = task_session_vnr(p);
1457
1458         i = p->state ? ffz(~p->state) + 1 : 0;
1459         psinfo->pr_state = i;
1460         psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i];
1461         psinfo->pr_zomb = psinfo->pr_sname == 'Z';
1462         psinfo->pr_nice = task_nice(p);
1463         psinfo->pr_flag = p->flags;
1464         rcu_read_lock();
1465         cred = __task_cred(p);
1466         SET_UID(psinfo->pr_uid, cred->uid);
1467         SET_GID(psinfo->pr_gid, cred->gid);
1468         rcu_read_unlock();
1469         strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname));
1470
1471         return 0;
1472 }
1473
1474 /* Here is the structure in which status of each thread is captured. */
1475 struct elf_thread_status
1476 {
1477         struct list_head list;
1478         struct elf_prstatus prstatus;   /* NT_PRSTATUS */
1479         elf_fpregset_t fpu;             /* NT_PRFPREG */
1480         struct task_struct *thread;
1481 #ifdef ELF_CORE_COPY_XFPREGS
1482         elf_fpxregset_t xfpu;           /* ELF_CORE_XFPREG_TYPE */
1483 #endif
1484         struct memelfnote notes[3];
1485         int num_notes;
1486 };
1487
1488 /*
1489  * In order to add the specific thread information for the elf file format,
1490  * we need to keep a linked list of every thread's pr_status and then create
1491  * a single section for them in the final core file.
1492  */
1493 static int elf_dump_thread_status(long signr, struct elf_thread_status *t)
1494 {
1495         struct task_struct *p = t->thread;
1496         int sz = 0;
1497
1498         t->num_notes = 0;
1499
1500         fill_prstatus(&t->prstatus, p, signr);
1501         elf_core_copy_task_regs(p, &t->prstatus.pr_reg);
1502
1503         fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus),
1504                   &t->prstatus);
1505         t->num_notes++;
1506         sz += notesize(&t->notes[0]);
1507
1508         t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu);
1509         if (t->prstatus.pr_fpvalid) {
1510                 fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu),
1511                           &t->fpu);
1512                 t->num_notes++;
1513                 sz += notesize(&t->notes[1]);
1514         }
1515
1516 #ifdef ELF_CORE_COPY_XFPREGS
1517         if (elf_core_copy_task_xfpregs(p, &t->xfpu)) {
1518                 fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE,
1519                           sizeof(t->xfpu), &t->xfpu);
1520                 t->num_notes++;
1521                 sz += notesize(&t->notes[2]);
1522         }
1523 #endif
1524         return sz;
1525 }
1526
1527 /*
1528  * dump the segments for an MMU process
1529  */
1530 #ifdef CONFIG_MMU
1531 static int elf_fdpic_dump_segments(struct file *file, size_t *size,
1532                            unsigned long *limit, unsigned long mm_flags)
1533 {
1534         struct vm_area_struct *vma;
1535         int err = 0;
1536
1537         for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
1538                 unsigned long addr;
1539
1540                 if (!maydump(vma, mm_flags))
1541                         continue;
1542
1543                 for (addr = vma->vm_start; addr < vma->vm_end;
1544                                                         addr += PAGE_SIZE) {
1545                         struct page *page = get_dump_page(addr);
1546                         if (page) {
1547                                 void *kaddr = kmap(page);
1548                                 *size += PAGE_SIZE;
1549                                 if (*size > *limit)
1550                                         err = -EFBIG;
1551                                 else if (!dump_write(file, kaddr, PAGE_SIZE))
1552                                         err = -EIO;
1553                                 kunmap(page);
1554                                 page_cache_release(page);
1555                         } else if (!dump_seek(file, file->f_pos + PAGE_SIZE))
1556                                 err = -EFBIG;
1557                         if (err)
1558                                 goto out;
1559                 }
1560         }
1561 out:
1562         return err;
1563 }
1564 #endif
1565
1566 /*
1567  * dump the segments for a NOMMU process
1568  */
1569 #ifndef CONFIG_MMU
1570 static int elf_fdpic_dump_segments(struct file *file, size_t *size,
1571                            unsigned long *limit, unsigned long mm_flags)
1572 {
1573         struct vm_area_struct *vma;
1574
1575         for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
1576                 if (!maydump(vma, mm_flags))
1577                         continue;
1578
1579                 if ((*size += PAGE_SIZE) > *limit)
1580                         return -EFBIG;
1581
1582                 if (!dump_write(file, (void *) vma->vm_start,
1583                                 vma->vm_end - vma->vm_start))
1584                         return -EIO;
1585         }
1586
1587         return 0;
1588 }
1589 #endif
1590
1591 /*
1592  * Actual dumper
1593  *
1594  * This is a two-pass process; first we find the offsets of the bits,
1595  * and then they are actually written out.  If we run out of core limit
1596  * we just truncate.
1597  */
1598 static int elf_fdpic_core_dump(struct coredump_params *cprm)
1599 {
1600 #define NUM_NOTES       6
1601         int has_dumped = 0;
1602         mm_segment_t fs;
1603         int segs;
1604         size_t size = 0;
1605         int i;
1606         struct vm_area_struct *vma;
1607         struct elfhdr *elf = NULL;
1608         loff_t offset = 0, dataoff;
1609         int numnote;
1610         struct memelfnote *notes = NULL;
1611         struct elf_prstatus *prstatus = NULL;   /* NT_PRSTATUS */
1612         struct elf_prpsinfo *psinfo = NULL;     /* NT_PRPSINFO */
1613         LIST_HEAD(thread_list);
1614         struct list_head *t;
1615         elf_fpregset_t *fpu = NULL;
1616 #ifdef ELF_CORE_COPY_XFPREGS
1617         elf_fpxregset_t *xfpu = NULL;
1618 #endif
1619         int thread_status_size = 0;
1620         elf_addr_t *auxv;
1621         unsigned long mm_flags;
1622
1623         /*
1624          * We no longer stop all VM operations.
1625          *
1626          * This is because those proceses that could possibly change map_count
1627          * or the mmap / vma pages are now blocked in do_exit on current
1628          * finishing this core dump.
1629          *
1630          * Only ptrace can touch these memory addresses, but it doesn't change
1631          * the map_count or the pages allocated. So no possibility of crashing
1632          * exists while dumping the mm->vm_next areas to the core file.
1633          */
1634
1635         /* alloc memory for large data structures: too large to be on stack */
1636         elf = kmalloc(sizeof(*elf), GFP_KERNEL);
1637         if (!elf)
1638                 goto cleanup;
1639         prstatus = kzalloc(sizeof(*prstatus), GFP_KERNEL);
1640         if (!prstatus)
1641                 goto cleanup;
1642         psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL);
1643         if (!psinfo)
1644                 goto cleanup;
1645         notes = kmalloc(NUM_NOTES * sizeof(struct memelfnote), GFP_KERNEL);
1646         if (!notes)
1647                 goto cleanup;
1648         fpu = kmalloc(sizeof(*fpu), GFP_KERNEL);
1649         if (!fpu)
1650                 goto cleanup;
1651 #ifdef ELF_CORE_COPY_XFPREGS
1652         xfpu = kmalloc(sizeof(*xfpu), GFP_KERNEL);
1653         if (!xfpu)
1654                 goto cleanup;
1655 #endif
1656
1657         if (cprm->signr) {
1658                 struct core_thread *ct;
1659                 struct elf_thread_status *tmp;
1660
1661                 for (ct = current->mm->core_state->dumper.next;
1662                                                 ct; ct = ct->next) {
1663                         tmp = kzalloc(sizeof(*tmp), GFP_KERNEL);
1664                         if (!tmp)
1665                                 goto cleanup;
1666
1667                         tmp->thread = ct->task;
1668                         list_add(&tmp->list, &thread_list);
1669                 }
1670
1671                 list_for_each(t, &thread_list) {
1672                         struct elf_thread_status *tmp;
1673                         int sz;
1674
1675                         tmp = list_entry(t, struct elf_thread_status, list);
1676                         sz = elf_dump_thread_status(cprm->signr, tmp);
1677                         thread_status_size += sz;
1678                 }
1679         }
1680
1681         /* now collect the dump for the current */
1682         fill_prstatus(prstatus, current, cprm->signr);
1683         elf_core_copy_regs(&prstatus->pr_reg, cprm->regs);
1684
1685         segs = current->mm->map_count;
1686 #ifdef ELF_CORE_EXTRA_PHDRS
1687         segs += ELF_CORE_EXTRA_PHDRS;
1688 #endif
1689
1690         /* Set up header */
1691         fill_elf_fdpic_header(elf, segs + 1);   /* including notes section */
1692
1693         has_dumped = 1;
1694         current->flags |= PF_DUMPCORE;
1695
1696         /*
1697          * Set up the notes in similar form to SVR4 core dumps made
1698          * with info from their /proc.
1699          */
1700
1701         fill_note(notes + 0, "CORE", NT_PRSTATUS, sizeof(*prstatus), prstatus);
1702         fill_psinfo(psinfo, current->group_leader, current->mm);
1703         fill_note(notes + 1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
1704
1705         numnote = 2;
1706
1707         auxv = (elf_addr_t *) current->mm->saved_auxv;
1708
1709         i = 0;
1710         do
1711                 i += 2;
1712         while (auxv[i - 2] != AT_NULL);
1713         fill_note(&notes[numnote++], "CORE", NT_AUXV,
1714                   i * sizeof(elf_addr_t), auxv);
1715
1716         /* Try to dump the FPU. */
1717         if ((prstatus->pr_fpvalid =
1718              elf_core_copy_task_fpregs(current, cprm->regs, fpu)))
1719                 fill_note(notes + numnote++,
1720                           "CORE", NT_PRFPREG, sizeof(*fpu), fpu);
1721 #ifdef ELF_CORE_COPY_XFPREGS
1722         if (elf_core_copy_task_xfpregs(current, xfpu))
1723                 fill_note(notes + numnote++,
1724                           "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu);
1725 #endif
1726
1727         fs = get_fs();
1728         set_fs(KERNEL_DS);
1729
1730         DUMP_WRITE(elf, sizeof(*elf));
1731         offset += sizeof(*elf);                         /* Elf header */
1732         offset += (segs+1) * sizeof(struct elf_phdr);   /* Program headers */
1733
1734         /* Write notes phdr entry */
1735         {
1736                 struct elf_phdr phdr;
1737                 int sz = 0;
1738
1739                 for (i = 0; i < numnote; i++)
1740                         sz += notesize(notes + i);
1741
1742                 sz += thread_status_size;
1743
1744                 fill_elf_note_phdr(&phdr, sz, offset);
1745                 offset += sz;
1746                 DUMP_WRITE(&phdr, sizeof(phdr));
1747         }
1748
1749         /* Page-align dumped data */
1750         dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE);
1751
1752         /*
1753          * We must use the same mm->flags while dumping core to avoid
1754          * inconsistency between the program headers and bodies, otherwise an
1755          * unusable core file can be generated.
1756          */
1757         mm_flags = current->mm->flags;
1758
1759         /* write program headers for segments dump */
1760         for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
1761                 struct elf_phdr phdr;
1762                 size_t sz;
1763
1764                 sz = vma->vm_end - vma->vm_start;
1765
1766                 phdr.p_type = PT_LOAD;
1767                 phdr.p_offset = offset;
1768                 phdr.p_vaddr = vma->vm_start;
1769                 phdr.p_paddr = 0;
1770                 phdr.p_filesz = maydump(vma, mm_flags) ? sz : 0;
1771                 phdr.p_memsz = sz;
1772                 offset += phdr.p_filesz;
1773                 phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
1774                 if (vma->vm_flags & VM_WRITE)
1775                         phdr.p_flags |= PF_W;
1776                 if (vma->vm_flags & VM_EXEC)
1777                         phdr.p_flags |= PF_X;
1778                 phdr.p_align = ELF_EXEC_PAGESIZE;
1779
1780                 DUMP_WRITE(&phdr, sizeof(phdr));
1781         }
1782
1783 #ifdef ELF_CORE_WRITE_EXTRA_PHDRS
1784         ELF_CORE_WRITE_EXTRA_PHDRS;
1785 #endif
1786
1787         /* write out the notes section */
1788         for (i = 0; i < numnote; i++)
1789                 if (!writenote(notes + i, cprm->file))
1790                         goto end_coredump;
1791
1792         /* write out the thread status notes section */
1793         list_for_each(t, &thread_list) {
1794                 struct elf_thread_status *tmp =
1795                                 list_entry(t, struct elf_thread_status, list);
1796
1797                 for (i = 0; i < tmp->num_notes; i++)
1798                         if (!writenote(&tmp->notes[i], cprm->file))
1799                                 goto end_coredump;
1800         }
1801
1802         if (!dump_seek(cprm->file, dataoff))
1803                 goto end_coredump;
1804
1805         if (elf_fdpic_dump_segments(cprm->file, &size, &cprm->limit,
1806                                     mm_flags) < 0)
1807                 goto end_coredump;
1808
1809 #ifdef ELF_CORE_WRITE_EXTRA_DATA
1810         ELF_CORE_WRITE_EXTRA_DATA;
1811 #endif
1812
1813         if (cprm->file->f_pos != offset) {
1814                 /* Sanity check */
1815                 printk(KERN_WARNING
1816                        "elf_core_dump: file->f_pos (%lld) != offset (%lld)\n",
1817                        cprm->file->f_pos, offset);
1818         }
1819
1820 end_coredump:
1821         set_fs(fs);
1822
1823 cleanup:
1824         while (!list_empty(&thread_list)) {
1825                 struct list_head *tmp = thread_list.next;
1826                 list_del(tmp);
1827                 kfree(list_entry(tmp, struct elf_thread_status, list));
1828         }
1829
1830         kfree(elf);
1831         kfree(prstatus);
1832         kfree(psinfo);
1833         kfree(notes);
1834         kfree(fpu);
1835 #ifdef ELF_CORE_COPY_XFPREGS
1836         kfree(xfpu);
1837 #endif
1838         return has_dumped;
1839 #undef NUM_NOTES
1840 }
1841
1842 #endif          /* CONFIG_ELF_CORE */