Blame view
fs/binfmt_elf_fdpic.c
47.1 KB
1da177e4c Linux-2.6.12-rc2 |
1 2 |
/* binfmt_elf_fdpic.c: FDPIC ELF binary format * |
8a2ab7f5d [PATCH] FDPIC: Ad... |
3 |
* Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved. |
1da177e4c Linux-2.6.12-rc2 |
4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 |
* Written by David Howells (dhowells@redhat.com) * Derived from binfmt_elf.c * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #include <linux/module.h> #include <linux/fs.h> #include <linux/stat.h> #include <linux/sched.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/errno.h> #include <linux/signal.h> #include <linux/binfmts.h> #include <linux/string.h> #include <linux/file.h> #include <linux/fcntl.h> #include <linux/slab.h> |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
27 |
#include <linux/pagemap.h> |
5edc2a512 binfmt_elf_fdpic:... |
28 |
#include <linux/security.h> |
1da177e4c Linux-2.6.12-rc2 |
29 |
#include <linux/highmem.h> |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
30 |
#include <linux/highuid.h> |
1da177e4c Linux-2.6.12-rc2 |
31 32 33 |
#include <linux/personality.h> #include <linux/ptrace.h> #include <linux/init.h> |
1da177e4c Linux-2.6.12-rc2 |
34 35 36 |
#include <linux/elf.h> #include <linux/elf-fdpic.h> #include <linux/elfcore.h> |
088e7af73 coredump: move du... |
37 |
#include <linux/coredump.h> |
1da177e4c Linux-2.6.12-rc2 |
38 39 40 41 42 43 |
#include <asm/uaccess.h> #include <asm/param.h> #include <asm/pgalloc.h> typedef char *elf_caddr_t; |
1da177e4c Linux-2.6.12-rc2 |
44 45 46 47 48 49 50 |
#if 0 #define kdebug(fmt, ...) printk("FDPIC "fmt" " ,##__VA_ARGS__ ) #else #define kdebug(fmt, ...) do {} while(0) #endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
51 52 53 54 55 56 |
#if 0 #define kdcore(fmt, ...) printk("FDPIC "fmt" " ,##__VA_ARGS__ ) #else #define kdcore(fmt, ...) do {} while(0) #endif |
1da177e4c Linux-2.6.12-rc2 |
57 |
MODULE_LICENSE("GPL"); |
71613c3b8 get rid of pt_reg... |
58 |
static int load_elf_fdpic_binary(struct linux_binprm *); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
59 60 61 |
static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *, struct file *); static int elf_fdpic_map_file(struct elf_fdpic_params *, struct file *, struct mm_struct *, const char *); |
1da177e4c Linux-2.6.12-rc2 |
62 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
63 64 65 |
static int create_elf_fdpic_tables(struct linux_binprm *, struct mm_struct *, struct elf_fdpic_params *, struct elf_fdpic_params *); |
1da177e4c Linux-2.6.12-rc2 |
66 67 |
#ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
68 69 70 71 72 |
static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *, unsigned long *); static int elf_fdpic_map_file_constdisp_on_uclinux(struct elf_fdpic_params *, struct file *, struct mm_struct *); |
1da177e4c Linux-2.6.12-rc2 |
73 |
#endif |
8a2ab7f5d [PATCH] FDPIC: Ad... |
74 75 |
static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *, struct file *, struct mm_struct *); |
1da177e4c Linux-2.6.12-rc2 |
76 |
|
698ba7b5a elf: kill USE_ELF... |
77 |
#ifdef CONFIG_ELF_CORE |
f6151dfea mm: introduce cor... |
78 |
static int elf_fdpic_core_dump(struct coredump_params *cprm); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
79 |
#endif |
1da177e4c Linux-2.6.12-rc2 |
80 81 82 |
static struct linux_binfmt elf_fdpic_format = { .module = THIS_MODULE, .load_binary = load_elf_fdpic_binary, |
698ba7b5a elf: kill USE_ELF... |
83 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
84 85 |
.core_dump = elf_fdpic_core_dump, #endif |
1da177e4c Linux-2.6.12-rc2 |
86 87 |
.min_coredump = ELF_EXEC_PAGESIZE, }; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
88 89 |
static int __init init_elf_fdpic_binfmt(void) { |
8fc3dc5a3 __register_binfmt... |
90 91 |
register_binfmt(&elf_fdpic_format); return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
92 |
} |
1da177e4c Linux-2.6.12-rc2 |
93 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
94 95 96 97 |
static void __exit exit_elf_fdpic_binfmt(void) { unregister_binfmt(&elf_fdpic_format); } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
98 |
core_initcall(init_elf_fdpic_binfmt); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
99 |
module_exit(exit_elf_fdpic_binfmt); |
1da177e4c Linux-2.6.12-rc2 |
100 101 102 103 104 105 106 107 108 |
static int is_elf_fdpic(struct elfhdr *hdr, struct file *file) { if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0) return 0; if (hdr->e_type != ET_EXEC && hdr->e_type != ET_DYN) return 0; if (!elf_check_arch(hdr) || !elf_check_fdpic(hdr)) return 0; |
72c2d5319 file->f_op is nev... |
109 |
if (!file->f_op->mmap) |
1da177e4c Linux-2.6.12-rc2 |
110 111 112 113 114 115 116 117 |
return 0; return 1; } /*****************************************************************************/ /* * read the program headers table into memory */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
118 119 |
static int elf_fdpic_fetch_phdrs(struct elf_fdpic_params *params, struct file *file) |
1da177e4c Linux-2.6.12-rc2 |
120 121 122 123 124 125 126 127 128 129 130 131 132 133 |
{ struct elf32_phdr *phdr; unsigned long size; int retval, loop; if (params->hdr.e_phentsize != sizeof(struct elf_phdr)) return -ENOMEM; if (params->hdr.e_phnum > 65536U / sizeof(struct elf_phdr)) return -ENOMEM; size = params->hdr.e_phnum * sizeof(struct elf_phdr); params->phdrs = kmalloc(size, GFP_KERNEL); if (!params->phdrs) return -ENOMEM; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
134 135 |
retval = kernel_read(file, params->hdr.e_phoff, (char *) params->phdrs, size); |
e1d2c8b69 fdpic: check that... |
136 137 |
if (unlikely(retval != size)) return retval < 0 ? retval : -ENOEXEC; |
1da177e4c Linux-2.6.12-rc2 |
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 |
/* determine stack size for this binary */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_GNU_STACK) continue; if (phdr->p_flags & PF_X) params->flags |= ELF_FDPIC_FLAG_EXEC_STACK; else params->flags |= ELF_FDPIC_FLAG_NOEXEC_STACK; params->stack_size = phdr->p_memsz; break; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
155 |
} |
1da177e4c Linux-2.6.12-rc2 |
156 157 158 159 160 |
/*****************************************************************************/ /* * load an fdpic binary into various bits of memory */ |
71613c3b8 get rid of pt_reg... |
161 |
static int load_elf_fdpic_binary(struct linux_binprm *bprm) |
1da177e4c Linux-2.6.12-rc2 |
162 163 |
{ struct elf_fdpic_params exec_params, interp_params; |
71613c3b8 get rid of pt_reg... |
164 |
struct pt_regs *regs = current_pt_regs(); |
1da177e4c Linux-2.6.12-rc2 |
165 |
struct elf_phdr *phdr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
166 |
unsigned long stack_size, entryaddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
167 168 169 |
#ifdef ELF_FDPIC_PLAT_INIT unsigned long dynaddr; #endif |
04e4f2b18 FDPIC: Respect PT... |
170 171 172 |
#ifndef CONFIG_MMU unsigned long stack_prot; #endif |
1da177e4c Linux-2.6.12-rc2 |
173 174 175 176 |
struct file *interpreter = NULL; /* to shut gcc up */ char *interpreter_name = NULL; int executable_stack; int retval, i; |
aa289b472 [PATCH] FDPIC: fi... |
177 |
kdebug("____ LOAD %d ____", current->pid); |
1da177e4c Linux-2.6.12-rc2 |
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 |
memset(&exec_params, 0, sizeof(exec_params)); memset(&interp_params, 0, sizeof(interp_params)); exec_params.hdr = *(struct elfhdr *) bprm->buf; exec_params.flags = ELF_FDPIC_FLAG_PRESENT | ELF_FDPIC_FLAG_EXECUTABLE; /* check that this is a binary we know how to deal with */ retval = -ENOEXEC; if (!is_elf_fdpic(&exec_params.hdr, bprm->file)) goto error; /* read the program header table */ retval = elf_fdpic_fetch_phdrs(&exec_params, bprm->file); if (retval < 0) goto error; /* scan for a program header that specifies an interpreter */ phdr = exec_params.phdrs; for (i = 0; i < exec_params.hdr.e_phnum; i++, phdr++) { switch (phdr->p_type) { case PT_INTERP: retval = -ENOMEM; if (phdr->p_filesz > PATH_MAX) goto error; retval = -ENOENT; if (phdr->p_filesz < 2) goto error; /* read the name of the interpreter into memory */ |
792db3af3 [PATCH] fs/binfmt... |
208 |
interpreter_name = kmalloc(phdr->p_filesz, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
209 210 211 212 213 214 215 |
if (!interpreter_name) goto error; retval = kernel_read(bprm->file, phdr->p_offset, interpreter_name, phdr->p_filesz); |
e1d2c8b69 fdpic: check that... |
216 217 218 |
if (unlikely(retval != phdr->p_filesz)) { if (retval >= 0) retval = -ENOEXEC; |
1da177e4c Linux-2.6.12-rc2 |
219 |
goto error; |
e1d2c8b69 fdpic: check that... |
220 |
} |
1da177e4c Linux-2.6.12-rc2 |
221 222 223 224 225 226 227 228 229 230 231 232 233 234 |
retval = -ENOENT; if (interpreter_name[phdr->p_filesz - 1] != '\0') goto error; kdebug("Using ELF interpreter %s", interpreter_name); /* replace the program with the interpreter */ interpreter = open_exec(interpreter_name); retval = PTR_ERR(interpreter); if (IS_ERR(interpreter)) { interpreter = NULL; goto error; } |
1fb844961 [PATCH] core-dump... |
235 236 237 238 239 |
/* * If the binary is not readable then enforce * mm->dumpable = 0 regardless of the interpreter's * permissions. */ |
1b5d783c9 consolidate BINPR... |
240 |
would_dump(bprm, interpreter); |
1fb844961 [PATCH] core-dump... |
241 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
242 243 |
retval = kernel_read(interpreter, 0, bprm->buf, BINPRM_BUF_SIZE); |
e1d2c8b69 fdpic: check that... |
244 245 246 |
if (unlikely(retval != BINPRM_BUF_SIZE)) { if (retval >= 0) retval = -ENOEXEC; |
1da177e4c Linux-2.6.12-rc2 |
247 |
goto error; |
e1d2c8b69 fdpic: check that... |
248 |
} |
1da177e4c Linux-2.6.12-rc2 |
249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 |
interp_params.hdr = *((struct elfhdr *) bprm->buf); break; case PT_LOAD: #ifdef CONFIG_MMU if (exec_params.load_addr == 0) exec_params.load_addr = phdr->p_vaddr; #endif break; } } if (elf_check_const_displacement(&exec_params.hdr)) exec_params.flags |= ELF_FDPIC_FLAG_CONSTDISP; /* perform insanity checks on the interpreter */ if (interpreter_name) { retval = -ELIBBAD; if (!is_elf_fdpic(&interp_params.hdr, interpreter)) goto error; interp_params.flags = ELF_FDPIC_FLAG_PRESENT; /* read the interpreter's program header table */ retval = elf_fdpic_fetch_phdrs(&interp_params, interpreter); if (retval < 0) goto error; } stack_size = exec_params.stack_size; |
1da177e4c Linux-2.6.12-rc2 |
281 282 283 284 |
if (exec_params.flags & ELF_FDPIC_FLAG_EXEC_STACK) executable_stack = EXSTACK_ENABLE_X; else if (exec_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK) executable_stack = EXSTACK_DISABLE_X; |
1da177e4c Linux-2.6.12-rc2 |
285 286 |
else executable_stack = EXSTACK_DEFAULT; |
8e8b63a68 fdpic: ignore the... |
287 288 289 290 291 292 293 294 295 |
if (stack_size == 0) { stack_size = interp_params.stack_size; if (interp_params.flags & ELF_FDPIC_FLAG_EXEC_STACK) executable_stack = EXSTACK_ENABLE_X; else if (interp_params.flags & ELF_FDPIC_FLAG_NOEXEC_STACK) executable_stack = EXSTACK_DISABLE_X; else executable_stack = EXSTACK_DEFAULT; } |
1da177e4c Linux-2.6.12-rc2 |
296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 |
retval = -ENOEXEC; if (stack_size == 0) goto error; if (elf_check_const_displacement(&interp_params.hdr)) interp_params.flags |= ELF_FDPIC_FLAG_CONSTDISP; /* flush all traces of the currently running executable */ retval = flush_old_exec(bprm); if (retval) goto error; /* there's now no turning back... the old userspace image is dead, * defunct, deceased, etc. after this point we have to exit via * error_kill */ set_personality(PER_LINUX_FDPIC); |
04e4f2b18 FDPIC: Respect PT... |
312 313 |
if (elf_read_implies_exec(&exec_params.hdr, executable_stack)) current->personality |= READ_IMPLIES_EXEC; |
221af7f87 Split 'flush_old_... |
314 315 |
setup_new_exec(bprm); |
1da177e4c Linux-2.6.12-rc2 |
316 317 318 319 320 321 322 323 324 |
set_binfmt(&elf_fdpic_format); current->mm->start_code = 0; current->mm->end_code = 0; current->mm->start_stack = 0; current->mm->start_data = 0; current->mm->end_data = 0; current->mm->context.exec_fdpic_loadmap = 0; current->mm->context.interp_fdpic_loadmap = 0; |
1da177e4c Linux-2.6.12-rc2 |
325 326 327 328 329 |
#ifdef CONFIG_MMU elf_fdpic_arch_lay_out_mm(&exec_params, &interp_params, ¤t->mm->start_stack, ¤t->mm->start_brk); |
1da177e4c Linux-2.6.12-rc2 |
330 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
331 332 |
retval = setup_arg_pages(bprm, current->mm->start_stack, executable_stack); |
1da177e4c Linux-2.6.12-rc2 |
333 334 335 336 337 338 339 |
if (retval < 0) { send_sig(SIGKILL, current, 0); goto error_kill; } #endif /* load the executable and interpreter into memory */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
340 341 |
retval = elf_fdpic_map_file(&exec_params, bprm->file, current->mm, "executable"); |
1da177e4c Linux-2.6.12-rc2 |
342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 |
if (retval < 0) goto error_kill; if (interpreter_name) { retval = elf_fdpic_map_file(&interp_params, interpreter, current->mm, "interpreter"); if (retval < 0) { printk(KERN_ERR "Unable to load interpreter "); goto error_kill; } allow_write_access(interpreter); fput(interpreter); interpreter = NULL; } #ifdef CONFIG_MMU if (!current->mm->start_brk) current->mm->start_brk = current->mm->end_data; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
362 363 |
current->mm->brk = current->mm->start_brk = PAGE_ALIGN(current->mm->start_brk); |
1da177e4c Linux-2.6.12-rc2 |
364 365 366 367 368 369 370 371 372 |
#else /* create a stack and brk area big enough for everyone * - the brk heap starts at the bottom and works up * - the stack starts at the top and works down */ stack_size = (stack_size + PAGE_SIZE - 1) & PAGE_MASK; if (stack_size < PAGE_SIZE * 2) stack_size = PAGE_SIZE * 2; |
04e4f2b18 FDPIC: Respect PT... |
373 374 375 376 |
stack_prot = PROT_READ | PROT_WRITE; if (executable_stack == EXSTACK_ENABLE_X || (executable_stack == EXSTACK_DEFAULT && VM_STACK_FLAGS & VM_EXEC)) stack_prot |= PROT_EXEC; |
6be5ceb02 VM: add "vm_mmap(... |
377 |
current->mm->start_brk = vm_mmap(NULL, 0, stack_size, stack_prot, |
ea6376395 nommu: fix malloc... |
378 379 |
MAP_PRIVATE | MAP_ANONYMOUS | MAP_UNINITIALIZED | MAP_GROWSDOWN, |
1da177e4c Linux-2.6.12-rc2 |
380 |
0); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
381 |
if (IS_ERR_VALUE(current->mm->start_brk)) { |
1da177e4c Linux-2.6.12-rc2 |
382 383 384 385 |
retval = current->mm->start_brk; current->mm->start_brk = 0; goto error_kill; } |
1da177e4c Linux-2.6.12-rc2 |
386 387 |
current->mm->brk = current->mm->start_brk; current->mm->context.end_brk = current->mm->start_brk; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
388 389 |
current->mm->context.end_brk += (stack_size > PAGE_SIZE) ? (stack_size - PAGE_SIZE) : 0; |
1da177e4c Linux-2.6.12-rc2 |
390 391 |
current->mm->start_stack = current->mm->start_brk + stack_size; #endif |
a6f76f23d CRED: Make execve... |
392 |
install_exec_creds(bprm); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
393 394 |
if (create_elf_fdpic_tables(bprm, current->mm, &exec_params, &interp_params) < 0) |
1da177e4c Linux-2.6.12-rc2 |
395 |
goto error_kill; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
396 397 398 399 400 401 402 |
kdebug("- start_code %lx", current->mm->start_code); kdebug("- end_code %lx", current->mm->end_code); kdebug("- start_data %lx", current->mm->start_data); kdebug("- end_data %lx", current->mm->end_data); kdebug("- start_brk %lx", current->mm->start_brk); kdebug("- brk %lx", current->mm->brk); kdebug("- start_stack %lx", current->mm->start_stack); |
1da177e4c Linux-2.6.12-rc2 |
403 404 405 406 407 408 409 410 |
#ifdef ELF_FDPIC_PLAT_INIT /* * The ABI may specify that certain registers be set up in special * ways (on i386 %edx is the address of a DT_FINI function, for * example. This macro performs whatever initialization to * the regs structure is required. */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
411 412 413 |
dynaddr = interp_params.dynamic_addr ?: exec_params.dynamic_addr; ELF_FDPIC_PLAT_INIT(regs, exec_params.map_addr, interp_params.map_addr, dynaddr); |
1da177e4c Linux-2.6.12-rc2 |
414 415 416 |
#endif /* everything is now ready... get the userspace context ready to roll */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
417 418 |
entryaddr = interp_params.entry_addr ?: exec_params.entry_addr; start_thread(regs, entryaddr, current->mm->start_stack); |
1da177e4c Linux-2.6.12-rc2 |
419 |
|
1da177e4c Linux-2.6.12-rc2 |
420 421 422 423 424 425 426 |
retval = 0; error: if (interpreter) { allow_write_access(interpreter); fput(interpreter); } |
f99d49adf [PATCH] kfree cle... |
427 428 429 430 431 |
kfree(interpreter_name); kfree(exec_params.phdrs); kfree(exec_params.loadmap); kfree(interp_params.phdrs); kfree(interp_params.loadmap); |
1da177e4c Linux-2.6.12-rc2 |
432 433 434 |
return retval; /* unrecoverable error - kill the process */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
435 |
error_kill: |
1da177e4c Linux-2.6.12-rc2 |
436 437 |
send_sig(SIGSEGV, current, 0); goto error; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
438 |
} |
1da177e4c Linux-2.6.12-rc2 |
439 440 |
/*****************************************************************************/ |
ec23847d6 binfmt_elf_fdpic:... |
441 442 443 444 445 446 447 448 449 |
#ifndef ELF_BASE_PLATFORM /* * AT_BASE_PLATFORM indicates the "real" hardware/microarchitecture. * If the arch defines ELF_BASE_PLATFORM (in asm/elf.h), the value * will be copied to the user stack in the same manner as AT_PLATFORM. */ #define ELF_BASE_PLATFORM NULL #endif |
1da177e4c Linux-2.6.12-rc2 |
450 |
/* |
c7637941d binfmt_elf_fdpic:... |
451 452 |
* present useful information to the program by shovelling it onto the new * process's stack |
1da177e4c Linux-2.6.12-rc2 |
453 454 455 456 457 458 |
*/ static int create_elf_fdpic_tables(struct linux_binprm *bprm, struct mm_struct *mm, struct elf_fdpic_params *exec_params, struct elf_fdpic_params *interp_params) { |
86a264abe CRED: Wrap curren... |
459 |
const struct cred *cred = current_cred(); |
1da177e4c Linux-2.6.12-rc2 |
460 |
unsigned long sp, csp, nitems; |
530018bf3 [PATCH] frv: binf... |
461 |
elf_caddr_t __user *argv, *envp; |
1da177e4c Linux-2.6.12-rc2 |
462 |
size_t platform_len = 0, len; |
ec23847d6 binfmt_elf_fdpic:... |
463 464 |
char *k_platform, *k_base_platform; char __user *u_platform, *u_base_platform, *p; |
1da177e4c Linux-2.6.12-rc2 |
465 |
int loop; |
9b14ec35f binfmt_elf_fdpic:... |
466 |
int nr; /* reset for each csp adjustment */ |
1da177e4c Linux-2.6.12-rc2 |
467 |
|
1da177e4c Linux-2.6.12-rc2 |
468 |
#ifdef CONFIG_MMU |
c7637941d binfmt_elf_fdpic:... |
469 470 471 472 473 474 |
/* In some cases (e.g. Hyper-Threading), we want to avoid L1 evictions * by the processes running on the same package. One thing we can do is * to shuffle the initial stack for them, so we give the architecture * an opportunity to do so here. */ sp = arch_align_stack(bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
475 476 477 478 479 480 481 |
#else sp = mm->start_stack; /* stack the program arguments and environment */ if (elf_fdpic_transfer_args_to_stack(bprm, &sp) < 0) return -EFAULT; #endif |
ec23847d6 binfmt_elf_fdpic:... |
482 483 484 485 486 487 |
/* * If this architecture has a platform capability string, copy it * to userspace. In some cases (Sparc), this info is impossible * for userspace to get any other way, in others (i386) it is * merely difficult. */ |
1da177e4c Linux-2.6.12-rc2 |
488 |
k_platform = ELF_PLATFORM; |
1aeb21d62 [PATCH] FDPIC: Fi... |
489 |
u_platform = NULL; |
1da177e4c Linux-2.6.12-rc2 |
490 491 492 493 |
if (k_platform) { platform_len = strlen(k_platform) + 1; sp -= platform_len; |
530018bf3 [PATCH] frv: binf... |
494 |
u_platform = (char __user *) sp; |
1da177e4c Linux-2.6.12-rc2 |
495 496 497 |
if (__copy_to_user(u_platform, k_platform, platform_len) != 0) return -EFAULT; } |
ec23847d6 binfmt_elf_fdpic:... |
498 499 500 501 502 503 504 505 506 507 508 509 510 511 |
/* * If this architecture has a "base" platform capability * string, copy it to userspace. */ k_base_platform = ELF_BASE_PLATFORM; u_base_platform = NULL; if (k_base_platform) { platform_len = strlen(k_base_platform) + 1; sp -= platform_len; u_base_platform = (char __user *) sp; if (__copy_to_user(u_base_platform, k_base_platform, platform_len) != 0) return -EFAULT; } |
1da177e4c Linux-2.6.12-rc2 |
512 513 514 515 516 517 518 |
sp &= ~7UL; /* stack the load map(s) */ len = sizeof(struct elf32_fdpic_loadmap); len += sizeof(struct elf32_fdpic_loadseg) * exec_params->loadmap->nsegs; sp = (sp - len) & ~7UL; exec_params->map_addr = sp; |
530018bf3 [PATCH] frv: binf... |
519 |
if (copy_to_user((void __user *) sp, exec_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
520 521 522 523 524 525 |
return -EFAULT; current->mm->context.exec_fdpic_loadmap = (unsigned long) sp; if (interp_params->loadmap) { len = sizeof(struct elf32_fdpic_loadmap); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
526 527 |
len += sizeof(struct elf32_fdpic_loadseg) * interp_params->loadmap->nsegs; |
1da177e4c Linux-2.6.12-rc2 |
528 529 |
sp = (sp - len) & ~7UL; interp_params->map_addr = sp; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
530 531 |
if (copy_to_user((void __user *) sp, interp_params->loadmap, len) != 0) |
1da177e4c Linux-2.6.12-rc2 |
532 533 534 535 536 537 |
return -EFAULT; current->mm->context.interp_fdpic_loadmap = (unsigned long) sp; } /* force 16 byte _final_ alignment here for generality */ |
5edc2a512 binfmt_elf_fdpic:... |
538 |
#define DLINFO_ITEMS 15 |
1da177e4c Linux-2.6.12-rc2 |
539 |
|
ec23847d6 binfmt_elf_fdpic:... |
540 541 |
nitems = 1 + DLINFO_ITEMS + (k_platform ? 1 : 0) + (k_base_platform ? 1 : 0) + AT_VECTOR_SIZE_ARCH; |
1da177e4c Linux-2.6.12-rc2 |
542 |
|
5edc2a512 binfmt_elf_fdpic:... |
543 544 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) nitems++; |
1da177e4c Linux-2.6.12-rc2 |
545 546 547 548 549 550 551 552 553 554 |
csp = sp; sp -= nitems * 2 * sizeof(unsigned long); sp -= (bprm->envc + 1) * sizeof(char *); /* envv[] */ sp -= (bprm->argc + 1) * sizeof(char *); /* argv[] */ sp -= 1 * sizeof(unsigned long); /* argc */ csp -= sp & 15UL; sp -= sp & 15UL; /* put the ELF interpreter info on the stack */ |
9b14ec35f binfmt_elf_fdpic:... |
555 |
#define NEW_AUX_ENT(id, val) \ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
556 557 558 559 560 561 |
do { \ struct { unsigned long _id, _val; } __user *ent; \ \ ent = (void __user *) csp; \ __put_user((id), &ent[nr]._id); \ __put_user((val), &ent[nr]._val); \ |
9b14ec35f binfmt_elf_fdpic:... |
562 |
nr++; \ |
1da177e4c Linux-2.6.12-rc2 |
563 |
} while (0) |
9b14ec35f binfmt_elf_fdpic:... |
564 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
565 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
566 |
NEW_AUX_ENT(AT_NULL, 0); |
1da177e4c Linux-2.6.12-rc2 |
567 |
if (k_platform) { |
9b14ec35f binfmt_elf_fdpic:... |
568 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
569 |
csp -= 2 * sizeof(unsigned long); |
9b14ec35f binfmt_elf_fdpic:... |
570 |
NEW_AUX_ENT(AT_PLATFORM, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
571 |
(elf_addr_t) (unsigned long) u_platform); |
1da177e4c Linux-2.6.12-rc2 |
572 |
} |
ec23847d6 binfmt_elf_fdpic:... |
573 574 575 576 577 578 |
if (k_base_platform) { nr = 0; csp -= 2 * sizeof(unsigned long); NEW_AUX_ENT(AT_BASE_PLATFORM, (elf_addr_t) (unsigned long) u_base_platform); } |
5edc2a512 binfmt_elf_fdpic:... |
579 580 581 582 583 |
if (bprm->interp_flags & BINPRM_FLAGS_EXECFD) { nr = 0; csp -= 2 * sizeof(unsigned long); NEW_AUX_ENT(AT_EXECFD, bprm->interp_data); } |
9b14ec35f binfmt_elf_fdpic:... |
584 |
nr = 0; |
1da177e4c Linux-2.6.12-rc2 |
585 |
csp -= DLINFO_ITEMS * 2 * sizeof(unsigned long); |
2171364d1 powerpc: Add HWCA... |
586 587 588 589 |
NEW_AUX_ENT(AT_HWCAP, ELF_HWCAP); #ifdef ELF_HWCAP2 NEW_AUX_ENT(AT_HWCAP2, ELF_HWCAP2); #endif |
9b14ec35f binfmt_elf_fdpic:... |
590 591 592 593 594 595 596 597 |
NEW_AUX_ENT(AT_PAGESZ, PAGE_SIZE); NEW_AUX_ENT(AT_CLKTCK, CLOCKS_PER_SEC); NEW_AUX_ENT(AT_PHDR, exec_params->ph_addr); NEW_AUX_ENT(AT_PHENT, sizeof(struct elf_phdr)); NEW_AUX_ENT(AT_PHNUM, exec_params->hdr.e_phnum); NEW_AUX_ENT(AT_BASE, interp_params->elfhdr_addr); NEW_AUX_ENT(AT_FLAGS, 0); NEW_AUX_ENT(AT_ENTRY, exec_params->entry_addr); |
ebc887b27 userns: Convert b... |
598 599 600 601 |
NEW_AUX_ENT(AT_UID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->uid)); NEW_AUX_ENT(AT_EUID, (elf_addr_t) from_kuid_munged(cred->user_ns, cred->euid)); NEW_AUX_ENT(AT_GID, (elf_addr_t) from_kgid_munged(cred->user_ns, cred->gid)); NEW_AUX_ENT(AT_EGID, (elf_addr_t) from_kgid_munged(cred->user_ns, cred->egid)); |
5edc2a512 binfmt_elf_fdpic:... |
602 603 |
NEW_AUX_ENT(AT_SECURE, security_bprm_secureexec(bprm)); NEW_AUX_ENT(AT_EXECFN, bprm->exec); |
1da177e4c Linux-2.6.12-rc2 |
604 605 |
#ifdef ARCH_DLINFO |
9b14ec35f binfmt_elf_fdpic:... |
606 607 |
nr = 0; csp -= AT_VECTOR_SIZE_ARCH * 2 * sizeof(unsigned long); |
1da177e4c Linux-2.6.12-rc2 |
608 609 610 611 612 613 614 615 616 |
/* ARCH_DLINFO must come last so platform specific code can enforce * special alignment requirements on the AUXV if necessary (eg. PPC). */ ARCH_DLINFO; #endif #undef NEW_AUX_ENT /* allocate room for argv[] and envv[] */ csp -= (bprm->envc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
617 |
envp = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
618 |
csp -= (bprm->argc + 1) * sizeof(elf_caddr_t); |
530018bf3 [PATCH] frv: binf... |
619 |
argv = (elf_caddr_t __user *) csp; |
1da177e4c Linux-2.6.12-rc2 |
620 621 622 |
/* stack argc */ csp -= sizeof(unsigned long); |
530018bf3 [PATCH] frv: binf... |
623 |
__put_user(bprm->argc, (unsigned long __user *) csp); |
1da177e4c Linux-2.6.12-rc2 |
624 |
|
88bcd5126 BUG_ON() Conversi... |
625 |
BUG_ON(csp != sp); |
1da177e4c Linux-2.6.12-rc2 |
626 627 628 629 630 |
/* fill in the argv[] array */ #ifdef CONFIG_MMU current->mm->arg_start = bprm->p; #else |
8a2ab7f5d [PATCH] FDPIC: Ad... |
631 632 |
current->mm->arg_start = current->mm->start_stack - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p); |
1da177e4c Linux-2.6.12-rc2 |
633 |
#endif |
530018bf3 [PATCH] frv: binf... |
634 |
p = (char __user *) current->mm->arg_start; |
1da177e4c Linux-2.6.12-rc2 |
635 636 |
for (loop = bprm->argc; loop > 0; loop--) { __put_user((elf_caddr_t) p, argv++); |
b6a2fea39 mm: variable leng... |
637 638 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
639 640 641 642 643 644 645 646 647 648 |
return -EINVAL; p += len; } __put_user(NULL, argv); current->mm->arg_end = (unsigned long) p; /* fill in the envv[] array */ current->mm->env_start = (unsigned long) p; for (loop = bprm->envc; loop > 0; loop--) { __put_user((elf_caddr_t)(unsigned long) p, envp++); |
b6a2fea39 mm: variable leng... |
649 650 |
len = strnlen_user(p, MAX_ARG_STRLEN); if (!len || len > MAX_ARG_STRLEN) |
1da177e4c Linux-2.6.12-rc2 |
651 652 653 654 655 656 657 658 |
return -EINVAL; p += len; } __put_user(NULL, envp); current->mm->env_end = (unsigned long) p; mm->start_stack = (unsigned long) sp; return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
659 |
} |
1da177e4c Linux-2.6.12-rc2 |
660 661 662 663 664 665 666 |
/*****************************************************************************/ /* * transfer the program arguments and environment from the holding pages onto * the stack */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
667 668 |
static int elf_fdpic_transfer_args_to_stack(struct linux_binprm *bprm, unsigned long *_sp) |
1da177e4c Linux-2.6.12-rc2 |
669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 |
{ unsigned long index, stop, sp; char *src; int ret = 0; stop = bprm->p >> PAGE_SHIFT; sp = *_sp; for (index = MAX_ARG_PAGES - 1; index >= stop; index--) { src = kmap(bprm->page[index]); sp -= PAGE_SIZE; if (copy_to_user((void *) sp, src, PAGE_SIZE) != 0) ret = -EFAULT; kunmap(bprm->page[index]); if (ret < 0) goto out; } *_sp = (*_sp - (MAX_ARG_PAGES * PAGE_SIZE - bprm->p)) & ~15; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
688 |
out: |
1da177e4c Linux-2.6.12-rc2 |
689 |
return ret; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
690 |
} |
1da177e4c Linux-2.6.12-rc2 |
691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 |
#endif /*****************************************************************************/ /* * load the appropriate binary image (executable or interpreter) into memory * - we assume no MMU is available * - if no other PIC bits are set in params->hdr->e_flags * - we assume that the LOADable segments in the binary are independently relocatable * - we assume R/O executable segments are shareable * - else * - we assume the loadable parts of the image to require fixed displacement * - the image is not shareable */ static int elf_fdpic_map_file(struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm, const char *what) { struct elf32_fdpic_loadmap *loadmap; #ifdef CONFIG_MMU struct elf32_fdpic_loadseg *mseg; #endif struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, stop; unsigned nloads, tmp; size_t size; int loop, ret; /* allocate a load map table */ nloads = 0; for (loop = 0; loop < params->hdr.e_phnum; loop++) if (params->phdrs[loop].p_type == PT_LOAD) nloads++; if (nloads == 0) return -ELIBBAD; size = sizeof(*loadmap) + nloads * sizeof(*seg); |
b87576d59 fs: Convert kmall... |
730 |
loadmap = kzalloc(size, GFP_KERNEL); |
1da177e4c Linux-2.6.12-rc2 |
731 732 733 734 |
if (!loadmap) return -ENOMEM; params->loadmap = loadmap; |
1da177e4c Linux-2.6.12-rc2 |
735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 |
loadmap->version = ELF32_FDPIC_LOADMAP_VERSION; loadmap->nsegs = nloads; load_addr = params->load_addr; seg = loadmap->segs; /* map the requested LOADs into the memory space */ switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) { case ELF_FDPIC_FLAG_CONSTDISP: case ELF_FDPIC_FLAG_CONTIGUOUS: #ifndef CONFIG_MMU ret = elf_fdpic_map_file_constdisp_on_uclinux(params, file, mm); if (ret < 0) return ret; break; #endif default: ret = elf_fdpic_map_file_by_direct_mmap(params, file, mm); if (ret < 0) return ret; break; } /* map the entry point */ if (params->hdr.e_entry) { seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (params->hdr.e_entry >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
764 |
params->hdr.e_entry < seg->p_vaddr + seg->p_memsz) { |
1da177e4c Linux-2.6.12-rc2 |
765 |
params->entry_addr = |
8a2ab7f5d [PATCH] FDPIC: Ad... |
766 767 |
(params->hdr.e_entry - seg->p_vaddr) + seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
768 769 770 771 772 773 |
break; } } } /* determine where the program header table has wound up if mapped */ |
8a2ab7f5d [PATCH] FDPIC: Ad... |
774 775 |
stop = params->hdr.e_phoff; stop += params->hdr.e_phnum * sizeof (struct elf_phdr); |
1da177e4c Linux-2.6.12-rc2 |
776 777 778 779 780 781 782 783 784 785 786 787 788 |
phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_LOAD) continue; if (phdr->p_offset > params->hdr.e_phoff || phdr->p_offset + phdr->p_filesz < stop) continue; seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (phdr->p_vaddr >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
789 790 791 792 793 |
phdr->p_vaddr + phdr->p_filesz <= seg->p_vaddr + seg->p_memsz) { params->ph_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr + |
1da177e4c Linux-2.6.12-rc2 |
794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 |
params->hdr.e_phoff - phdr->p_offset; break; } } break; } /* determine where the dynamic section has wound up if there is one */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (phdr->p_type != PT_DYNAMIC) continue; seg = loadmap->segs; for (loop = loadmap->nsegs; loop > 0; loop--, seg++) { if (phdr->p_vaddr >= seg->p_vaddr && |
8a2ab7f5d [PATCH] FDPIC: Ad... |
810 811 812 813 814 815 816 817 818 |
phdr->p_vaddr + phdr->p_memsz <= seg->p_vaddr + seg->p_memsz) { params->dynamic_addr = (phdr->p_vaddr - seg->p_vaddr) + seg->addr; /* check the dynamic section contains at least * one item, and that the last item is a NULL * entry */ |
1da177e4c Linux-2.6.12-rc2 |
819 820 821 822 823 |
if (phdr->p_memsz == 0 || phdr->p_memsz % sizeof(Elf32_Dyn) != 0) goto dynamic_error; tmp = phdr->p_memsz / sizeof(Elf32_Dyn); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
824 825 |
if (((Elf32_Dyn *) params->dynamic_addr)[tmp - 1].d_tag != 0) |
1da177e4c Linux-2.6.12-rc2 |
826 827 828 829 830 831 832 833 |
goto dynamic_error; break; } } break; } /* now elide adjacent segments in the load map on MMU linux |
8a2ab7f5d [PATCH] FDPIC: Ad... |
834 835 |
* - on uClinux the holes between may actually be filled with system * stuff or stuff from other processes |
1da177e4c Linux-2.6.12-rc2 |
836 837 838 839 840 841 842 843 844 845 |
*/ #ifdef CONFIG_MMU nloads = loadmap->nsegs; mseg = loadmap->segs; seg = mseg + 1; for (loop = 1; loop < nloads; loop++) { /* see if we have a candidate for merging */ if (seg->p_vaddr - mseg->p_vaddr == seg->addr - mseg->addr) { load_addr = PAGE_ALIGN(mseg->addr + mseg->p_memsz); if (load_addr == (seg->addr & PAGE_MASK)) { |
8a2ab7f5d [PATCH] FDPIC: Ad... |
846 847 848 |
mseg->p_memsz += load_addr - (mseg->addr + mseg->p_memsz); |
1da177e4c Linux-2.6.12-rc2 |
849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 |
mseg->p_memsz += seg->addr & ~PAGE_MASK; mseg->p_memsz += seg->p_memsz; loadmap->nsegs--; continue; } } mseg++; if (mseg != seg) *mseg = *seg; } #endif kdebug("Mapped Object [%s]:", what); kdebug("- elfhdr : %lx", params->elfhdr_addr); kdebug("- entry : %lx", params->entry_addr); kdebug("- PHDR[] : %lx", params->ph_addr); kdebug("- DYNAMIC[]: %lx", params->dynamic_addr); seg = loadmap->segs; for (loop = 0; loop < loadmap->nsegs; loop++, seg++) kdebug("- LOAD[%d] : %08x-%08x [va=%x ms=%x]", loop, seg->addr, seg->addr + seg->p_memsz - 1, seg->p_vaddr, seg->p_memsz); return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
875 |
dynamic_error: |
1da177e4c Linux-2.6.12-rc2 |
876 877 |
printk("ELF FDPIC %s with invalid DYNAMIC section (inode=%lu) ", |
496ad9aa8 new helper: file_... |
878 |
what, file_inode(file)->i_ino); |
1da177e4c Linux-2.6.12-rc2 |
879 |
return -ELIBBAD; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
880 |
} |
1da177e4c Linux-2.6.12-rc2 |
881 882 883 884 885 886 |
/*****************************************************************************/ /* * map a file with constant displacement under uClinux */ #ifndef CONFIG_MMU |
8a2ab7f5d [PATCH] FDPIC: Ad... |
887 888 889 890 |
static int elf_fdpic_map_file_constdisp_on_uclinux( struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm) |
1da177e4c Linux-2.6.12-rc2 |
891 892 893 894 |
{ struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, base = ULONG_MAX, top = 0, maddr = 0, mflags; |
1da177e4c Linux-2.6.12-rc2 |
895 896 897 898 |
int loop, ret; load_addr = params->load_addr; seg = params->loadmap->segs; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
899 900 |
/* determine the bounds of the contiguous overall allocation we must * make */ |
1da177e4c Linux-2.6.12-rc2 |
901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 |
phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (params->phdrs[loop].p_type != PT_LOAD) continue; if (base > phdr->p_vaddr) base = phdr->p_vaddr; if (top < phdr->p_vaddr + phdr->p_memsz) top = phdr->p_vaddr + phdr->p_memsz; } /* allocate one big anon block for everything */ mflags = MAP_PRIVATE; if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE) mflags |= MAP_EXECUTABLE; |
6be5ceb02 VM: add "vm_mmap(... |
916 |
maddr = vm_mmap(NULL, load_addr, top - base, |
1da177e4c Linux-2.6.12-rc2 |
917 |
PROT_READ | PROT_WRITE | PROT_EXEC, mflags, 0); |
8a2ab7f5d [PATCH] FDPIC: Ad... |
918 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
919 920 921 922 923 924 925 926 927 928 |
return (int) maddr; if (load_addr != 0) load_addr += PAGE_ALIGN(top - base); /* and then load the file segments into it */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { if (params->phdrs[loop].p_type != PT_LOAD) continue; |
1da177e4c Linux-2.6.12-rc2 |
929 930 931 |
seg->addr = maddr + (phdr->p_vaddr - base); seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; |
3dc20cb28 new helper: read_... |
932 933 |
ret = read_code(file, seg->addr, phdr->p_offset, phdr->p_filesz); |
1da177e4c Linux-2.6.12-rc2 |
934 935 936 937 938 939 940 941 |
if (ret < 0) return ret; /* map the ELF header address if in this segment */ if (phdr->p_offset == 0) params->elfhdr_addr = seg->addr; /* clear any space allocated but not loaded */ |
ab4ad5551 bin_elf_fdpic: ch... |
942 |
if (phdr->p_filesz < phdr->p_memsz) { |
e30c7c3b3 binfmt_elf_fdpic:... |
943 944 945 |
if (clear_user((void *) (seg->addr + phdr->p_filesz), phdr->p_memsz - phdr->p_filesz)) return -EFAULT; |
ab4ad5551 bin_elf_fdpic: ch... |
946 |
} |
1da177e4c Linux-2.6.12-rc2 |
947 948 949 |
if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
950 951 952 953 954 |
if (!mm->start_code) { mm->start_code = seg->addr; mm->end_code = seg->addr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
955 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
956 |
mm->start_data = seg->addr; |
1da177e4c Linux-2.6.12-rc2 |
957 |
mm->end_data = seg->addr + phdr->p_memsz; |
1da177e4c Linux-2.6.12-rc2 |
958 |
} |
1da177e4c Linux-2.6.12-rc2 |
959 960 961 962 963 964 |
} seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
965 |
} |
1da177e4c Linux-2.6.12-rc2 |
966 967 968 969 970 971 972 973 974 975 976 977 978 |
#endif /*****************************************************************************/ /* * map a binary by direct mmap() of the individual PT_LOAD segments */ static int elf_fdpic_map_file_by_direct_mmap(struct elf_fdpic_params *params, struct file *file, struct mm_struct *mm) { struct elf32_fdpic_loadseg *seg; struct elf32_phdr *phdr; unsigned long load_addr, delta_vaddr; |
e30c7c3b3 binfmt_elf_fdpic:... |
979 |
int loop, dvset; |
1da177e4c Linux-2.6.12-rc2 |
980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 |
load_addr = params->load_addr; delta_vaddr = 0; dvset = 0; seg = params->loadmap->segs; /* deal with each load segment separately */ phdr = params->phdrs; for (loop = 0; loop < params->hdr.e_phnum; loop++, phdr++) { unsigned long maddr, disp, excess, excess1; int prot = 0, flags; if (phdr->p_type != PT_LOAD) continue; kdebug("[LOAD] va=%lx of=%lx fs=%lx ms=%lx", (unsigned long) phdr->p_vaddr, (unsigned long) phdr->p_offset, (unsigned long) phdr->p_filesz, (unsigned long) phdr->p_memsz); /* determine the mapping parameters */ if (phdr->p_flags & PF_R) prot |= PROT_READ; if (phdr->p_flags & PF_W) prot |= PROT_WRITE; if (phdr->p_flags & PF_X) prot |= PROT_EXEC; flags = MAP_PRIVATE | MAP_DENYWRITE; if (params->flags & ELF_FDPIC_FLAG_EXECUTABLE) flags |= MAP_EXECUTABLE; maddr = 0; switch (params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) { case ELF_FDPIC_FLAG_INDEPENDENT: /* PT_LOADs are independently locatable */ break; case ELF_FDPIC_FLAG_HONOURVADDR: /* the specified virtual address must be honoured */ maddr = phdr->p_vaddr; flags |= MAP_FIXED; break; case ELF_FDPIC_FLAG_CONSTDISP: /* constant displacement |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1026 1027 |
* - can be mapped anywhere, but must be mapped as a * unit |
1da177e4c Linux-2.6.12-rc2 |
1028 1029 1030 1031 1032 |
*/ if (!dvset) { maddr = load_addr; delta_vaddr = phdr->p_vaddr; dvset = 1; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1033 |
} else { |
1da177e4c Linux-2.6.12-rc2 |
1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 |
maddr = load_addr + phdr->p_vaddr - delta_vaddr; flags |= MAP_FIXED; } break; case ELF_FDPIC_FLAG_CONTIGUOUS: /* contiguity handled later */ break; default: BUG(); } maddr &= PAGE_MASK; /* create the mapping */ disp = phdr->p_vaddr & ~PAGE_MASK; |
6be5ceb02 VM: add "vm_mmap(... |
1051 |
maddr = vm_mmap(file, maddr, phdr->p_memsz + disp, prot, flags, |
1da177e4c Linux-2.6.12-rc2 |
1052 |
phdr->p_offset - disp); |
1da177e4c Linux-2.6.12-rc2 |
1053 1054 |
kdebug("mmap[%d] <file> sz=%lx pr=%x fl=%x of=%lx --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1055 1056 |
loop, phdr->p_memsz + disp, prot, flags, phdr->p_offset - disp, maddr); |
1da177e4c Linux-2.6.12-rc2 |
1057 |
|
8a2ab7f5d [PATCH] FDPIC: Ad... |
1058 |
if (IS_ERR_VALUE(maddr)) |
1da177e4c Linux-2.6.12-rc2 |
1059 |
return (int) maddr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1060 1061 |
if ((params->flags & ELF_FDPIC_FLAG_ARRANGEMENT) == ELF_FDPIC_FLAG_CONTIGUOUS) |
1da177e4c Linux-2.6.12-rc2 |
1062 1063 1064 1065 1066 1067 1068 1069 1070 |
load_addr += PAGE_ALIGN(phdr->p_memsz + disp); seg->addr = maddr + disp; seg->p_vaddr = phdr->p_vaddr; seg->p_memsz = phdr->p_memsz; /* map the ELF header address if in this segment */ if (phdr->p_offset == 0) params->elfhdr_addr = seg->addr; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1071 1072 |
/* clear the bit between beginning of mapping and beginning of * PT_LOAD */ |
1da177e4c Linux-2.6.12-rc2 |
1073 1074 |
if (prot & PROT_WRITE && disp > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr, disp); |
e30c7c3b3 binfmt_elf_fdpic:... |
1075 1076 |
if (clear_user((void __user *) maddr, disp)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 |
maddr += disp; } /* clear any space allocated but not loaded * - on uClinux we can just clear the lot * - on MMU linux we'll get a SIGBUS beyond the last page * extant in the file */ excess = phdr->p_memsz - phdr->p_filesz; excess1 = PAGE_SIZE - ((maddr + phdr->p_filesz) & ~PAGE_MASK); #ifdef CONFIG_MMU |
1da177e4c Linux-2.6.12-rc2 |
1089 1090 1091 1092 1093 |
if (excess > excess1) { unsigned long xaddr = maddr + phdr->p_filesz + excess1; unsigned long xmaddr; flags |= MAP_FIXED | MAP_ANONYMOUS; |
6be5ceb02 VM: add "vm_mmap(... |
1094 |
xmaddr = vm_mmap(NULL, xaddr, excess - excess1, |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1095 |
prot, flags, 0); |
1da177e4c Linux-2.6.12-rc2 |
1096 1097 1098 |
kdebug("mmap[%d] <anon>" " ad=%lx sz=%lx pr=%x fl=%x of=0 --> %08lx", |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1099 1100 |
loop, xaddr, excess - excess1, prot, flags, xmaddr); |
1da177e4c Linux-2.6.12-rc2 |
1101 1102 1103 1104 1105 1106 1107 1108 |
if (xmaddr != xaddr) return -ENOMEM; } if (prot & PROT_WRITE && excess1 > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess1); |
e30c7c3b3 binfmt_elf_fdpic:... |
1109 1110 1111 |
if (clear_user((void __user *) maddr + phdr->p_filesz, excess1)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1112 1113 1114 1115 1116 1117 |
} #else if (excess > 0) { kdebug("clear[%d] ad=%lx sz=%lx", loop, maddr + phdr->p_filesz, excess); |
e30c7c3b3 binfmt_elf_fdpic:... |
1118 1119 |
if (clear_user((void *) maddr + phdr->p_filesz, excess)) return -EFAULT; |
1da177e4c Linux-2.6.12-rc2 |
1120 1121 1122 1123 1124 |
} #endif if (mm) { if (phdr->p_flags & PF_X) { |
aa289b472 [PATCH] FDPIC: fi... |
1125 1126 1127 1128 |
if (!mm->start_code) { mm->start_code = maddr; mm->end_code = maddr + phdr->p_memsz; } |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1129 |
} else if (!mm->start_data) { |
1da177e4c Linux-2.6.12-rc2 |
1130 1131 1132 1133 1134 1135 1136 1137 1138 |
mm->start_data = maddr; mm->end_data = maddr + phdr->p_memsz; } } seg++; } return 0; |
8a2ab7f5d [PATCH] FDPIC: Ad... |
1139 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 |
/*****************************************************************************/ /* * ELF-FDPIC core dumper * * Modelled on fs/exec.c:aout_core_dump() * Jeremy Fitzhardinge <jeremy@sw.oz.au> * * Modelled on fs/binfmt_elf.c core dumper */ |
698ba7b5a elf: kill USE_ELF... |
1150 |
#ifdef CONFIG_ELF_CORE |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1151 1152 |
/* |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1153 1154 1155 1156 1157 1158 |
* Decide whether a segment is worth dumping; default is yes to be * sure (missing info is worse than too much; etc). * Personally I'd include everything, and use the coredump limit... * * I think we should skip something. But I am not sure how. H.J. */ |
ee78b0a61 coredump masking:... |
1159 |
static int maydump(struct vm_area_struct *vma, unsigned long mm_flags) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1160 |
{ |
ee78b0a61 coredump masking:... |
1161 |
int dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1162 |
/* Do not dump I/O mapped devices or special mappings */ |
314e51b98 mm: kill vma flag... |
1163 |
if (vma->vm_flags & VM_IO) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 |
kdcore("%08lx: %08lx: no (IO)", vma->vm_start, vma->vm_flags); return 0; } /* If we may not read the contents, don't allow us to dump * them either. "dump_write()" can't handle it anyway. */ if (!(vma->vm_flags & VM_READ)) { kdcore("%08lx: %08lx: no (!read)", vma->vm_start, vma->vm_flags); return 0; } |
ee78b0a61 coredump masking:... |
1175 |
/* By default, dump shared memory if mapped from an anonymous file. */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1176 |
if (vma->vm_flags & VM_SHARED) { |
496ad9aa8 new helper: file_... |
1177 |
if (file_inode(vma->vm_file)->i_nlink == 0) { |
ee78b0a61 coredump masking:... |
1178 1179 1180 1181 |
dump_ok = test_bit(MMF_DUMP_ANON_SHARED, &mm_flags); kdcore("%08lx: %08lx: %s (share)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1182 |
} |
ee78b0a61 coredump masking:... |
1183 1184 1185 1186 |
dump_ok = test_bit(MMF_DUMP_MAPPED_SHARED, &mm_flags); kdcore("%08lx: %08lx: %s (share)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1187 1188 1189 |
} #ifdef CONFIG_MMU |
ee78b0a61 coredump masking:... |
1190 |
/* By default, if it hasn't been written to, don't write it out */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1191 |
if (!vma->anon_vma) { |
ee78b0a61 coredump masking:... |
1192 1193 1194 1195 |
dump_ok = test_bit(MMF_DUMP_MAPPED_PRIVATE, &mm_flags); kdcore("%08lx: %08lx: %s (!anon)", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1196 1197 |
} #endif |
ee78b0a61 coredump masking:... |
1198 1199 1200 1201 |
dump_ok = test_bit(MMF_DUMP_ANON_PRIVATE, &mm_flags); kdcore("%08lx: %08lx: %s", vma->vm_start, vma->vm_flags, dump_ok ? "yes" : "no"); return dump_ok; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 |
} /* An ELF note in memory */ struct memelfnote { const char *name; int type; unsigned int datasz; void *data; }; static int notesize(struct memelfnote *en) { int sz; sz = sizeof(struct elf_note); sz += roundup(strlen(en->name) + 1, 4); sz += roundup(en->datasz, 4); return sz; } /* #define DEBUG */ |
e6c1baa9b convert the rest ... |
1225 |
static int writenote(struct memelfnote *men, struct coredump_params *cprm) |
05f47fda9 coredump: unify d... |
1226 1227 |
{ struct elf_note en; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1228 1229 1230 |
en.n_namesz = strlen(men->name) + 1; en.n_descsz = men->datasz; en.n_type = men->type; |
e6c1baa9b convert the rest ... |
1231 |
return dump_emit(cprm, &en, sizeof(en)) && |
22a8cb824 new helper: dump_... |
1232 1233 |
dump_emit(cprm, men->name, en.n_namesz) && dump_align(cprm, 4) && dump_emit(cprm, men->data, men->datasz) && dump_align(cprm, 4); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1234 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1235 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 |
static inline void fill_elf_fdpic_header(struct elfhdr *elf, int segs) { memcpy(elf->e_ident, ELFMAG, SELFMAG); elf->e_ident[EI_CLASS] = ELF_CLASS; elf->e_ident[EI_DATA] = ELF_DATA; elf->e_ident[EI_VERSION] = EV_CURRENT; elf->e_ident[EI_OSABI] = ELF_OSABI; memset(elf->e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD); elf->e_type = ET_CORE; elf->e_machine = ELF_ARCH; elf->e_version = EV_CURRENT; elf->e_entry = 0; elf->e_phoff = sizeof(struct elfhdr); elf->e_shoff = 0; elf->e_flags = ELF_FDPIC_CORE_EFLAGS; elf->e_ehsize = sizeof(struct elfhdr); elf->e_phentsize = sizeof(struct elf_phdr); elf->e_phnum = segs; elf->e_shentsize = 0; elf->e_shnum = 0; elf->e_shstrndx = 0; return; } static inline void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset) { phdr->p_type = PT_NOTE; phdr->p_offset = offset; phdr->p_vaddr = 0; phdr->p_paddr = 0; phdr->p_filesz = sz; phdr->p_memsz = 0; phdr->p_flags = 0; phdr->p_align = 0; return; } static inline void fill_note(struct memelfnote *note, const char *name, int type, unsigned int sz, void *data) { note->name = name; note->type = type; note->datasz = sz; note->data = data; return; } /* * fill up all the fields in prstatus from the given task struct, except |
3ad2f3fbb tree-wide: Assort... |
1286 |
* registers which need to be filled up separately. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1287 1288 1289 1290 1291 1292 1293 |
*/ static void fill_prstatus(struct elf_prstatus *prstatus, struct task_struct *p, long signr) { prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; prstatus->pr_sigpend = p->pending.signal.sig[0]; prstatus->pr_sighold = p->blocked.sig[0]; |
3b34fc588 elf_core_dump: us... |
1294 1295 1296 |
rcu_read_lock(); prstatus->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1297 |
prstatus->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1298 1299 |
prstatus->pr_pgrp = task_pgrp_vnr(p); prstatus->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1300 |
if (thread_group_leader(p)) { |
2515ddc6d binfmt_elf_fdpic:... |
1301 |
struct task_cputime cputime; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1302 |
/* |
2515ddc6d binfmt_elf_fdpic:... |
1303 1304 |
* This is the record for the group leader. It shows the * group-wide total, not its individual thread total. |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1305 |
*/ |
2515ddc6d binfmt_elf_fdpic:... |
1306 1307 1308 |
thread_group_cputime(p, &cputime); cputime_to_timeval(cputime.utime, &prstatus->pr_utime); cputime_to_timeval(cputime.stime, &prstatus->pr_stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1309 |
} else { |
6fac4829c cputime: Use acce... |
1310 1311 1312 1313 1314 |
cputime_t utime, stime; task_cputime(p, &utime, &stime); cputime_to_timeval(utime, &prstatus->pr_utime); cputime_to_timeval(stime, &prstatus->pr_stime); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 |
} cputime_to_timeval(p->signal->cutime, &prstatus->pr_cutime); cputime_to_timeval(p->signal->cstime, &prstatus->pr_cstime); prstatus->pr_exec_fdpic_loadmap = p->mm->context.exec_fdpic_loadmap; prstatus->pr_interp_fdpic_loadmap = p->mm->context.interp_fdpic_loadmap; } static int fill_psinfo(struct elf_prpsinfo *psinfo, struct task_struct *p, struct mm_struct *mm) { |
c69e8d9c0 CRED: Use RCU to ... |
1326 |
const struct cred *cred; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 |
unsigned int i, len; /* first copy the parameters from user space */ memset(psinfo, 0, sizeof(struct elf_prpsinfo)); len = mm->arg_end - mm->arg_start; if (len >= ELF_PRARGSZ) len = ELF_PRARGSZ - 1; if (copy_from_user(&psinfo->pr_psargs, (const char __user *) mm->arg_start, len)) return -EFAULT; for (i = 0; i < len; i++) if (psinfo->pr_psargs[i] == 0) psinfo->pr_psargs[i] = ' '; psinfo->pr_psargs[len] = 0; |
3b34fc588 elf_core_dump: us... |
1342 1343 1344 |
rcu_read_lock(); psinfo->pr_ppid = task_pid_vnr(rcu_dereference(p->real_parent)); rcu_read_unlock(); |
b488893a3 pid namespaces: c... |
1345 |
psinfo->pr_pid = task_pid_vnr(p); |
b488893a3 pid namespaces: c... |
1346 1347 |
psinfo->pr_pgrp = task_pgrp_vnr(p); psinfo->pr_sid = task_session_vnr(p); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1348 1349 1350 1351 1352 1353 1354 |
i = p->state ? ffz(~p->state) + 1 : 0; psinfo->pr_state = i; psinfo->pr_sname = (i > 5) ? '.' : "RSDTZW"[i]; psinfo->pr_zomb = psinfo->pr_sname == 'Z'; psinfo->pr_nice = task_nice(p); psinfo->pr_flag = p->flags; |
c69e8d9c0 CRED: Use RCU to ... |
1355 1356 |
rcu_read_lock(); cred = __task_cred(p); |
ebc887b27 userns: Convert b... |
1357 1358 |
SET_UID(psinfo->pr_uid, from_kuid_munged(cred->user_ns, cred->uid)); SET_GID(psinfo->pr_gid, from_kgid_munged(cred->user_ns, cred->gid)); |
c69e8d9c0 CRED: Use RCU to ... |
1359 |
rcu_read_unlock(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 |
strncpy(psinfo->pr_fname, p->comm, sizeof(psinfo->pr_fname)); return 0; } /* Here is the structure in which status of each thread is captured. */ struct elf_thread_status { struct list_head list; struct elf_prstatus prstatus; /* NT_PRSTATUS */ elf_fpregset_t fpu; /* NT_PRFPREG */ struct task_struct *thread; #ifdef ELF_CORE_COPY_XFPREGS |
5b20cd80b x86: replace NT_P... |
1373 |
elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 |
#endif struct memelfnote notes[3]; int num_notes; }; /* * In order to add the specific thread information for the elf file format, * we need to keep a linked list of every thread's pr_status and then create * a single section for them in the final core file. */ static int elf_dump_thread_status(long signr, struct elf_thread_status *t) { struct task_struct *p = t->thread; int sz = 0; t->num_notes = 0; fill_prstatus(&t->prstatus, p, signr); elf_core_copy_task_regs(p, &t->prstatus.pr_reg); fill_note(&t->notes[0], "CORE", NT_PRSTATUS, sizeof(t->prstatus), &t->prstatus); t->num_notes++; sz += notesize(&t->notes[0]); t->prstatus.pr_fpvalid = elf_core_copy_task_fpregs(p, NULL, &t->fpu); if (t->prstatus.pr_fpvalid) { fill_note(&t->notes[1], "CORE", NT_PRFPREG, sizeof(t->fpu), &t->fpu); t->num_notes++; sz += notesize(&t->notes[1]); } #ifdef ELF_CORE_COPY_XFPREGS if (elf_core_copy_task_xfpregs(p, &t->xfpu)) { |
5b20cd80b x86: replace NT_P... |
1409 1410 |
fill_note(&t->notes[2], "LINUX", ELF_CORE_XFPREG_TYPE, sizeof(t->xfpu), &t->xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1411 1412 1413 1414 1415 1416 |
t->num_notes++; sz += notesize(&t->notes[2]); } #endif return sz; } |
8d9032bbe elf coredump: add... |
1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 |
static void fill_extnum_info(struct elfhdr *elf, struct elf_shdr *shdr4extnum, elf_addr_t e_shoff, int segs) { elf->e_shoff = e_shoff; elf->e_shentsize = sizeof(*shdr4extnum); elf->e_shnum = 1; elf->e_shstrndx = SHN_UNDEF; memset(shdr4extnum, 0, sizeof(*shdr4extnum)); shdr4extnum->sh_type = SHT_NULL; shdr4extnum->sh_size = elf->e_shnum; shdr4extnum->sh_link = elf->e_shstrndx; shdr4extnum->sh_info = segs; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1432 1433 1434 |
/* * dump the segments for an MMU process */ |
e6c1baa9b convert the rest ... |
1435 |
static bool elf_fdpic_dump_segments(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1436 1437 1438 1439 1440 |
{ struct vm_area_struct *vma; for (vma = current->mm->mmap; vma; vma = vma->vm_next) { unsigned long addr; |
e6c1baa9b convert the rest ... |
1441 |
if (!maydump(vma, cprm->mm_flags)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1442 |
continue; |
e6c1baa9b convert the rest ... |
1443 |
#ifdef CONFIG_MMU |
f3e8fccd0 mm: add get_dump_... |
1444 1445 |
for (addr = vma->vm_start; addr < vma->vm_end; addr += PAGE_SIZE) { |
e6c1baa9b convert the rest ... |
1446 |
bool res; |
f3e8fccd0 mm: add get_dump_... |
1447 1448 1449 |
struct page *page = get_dump_page(addr); if (page) { void *kaddr = kmap(page); |
e6c1baa9b convert the rest ... |
1450 |
res = dump_emit(cprm, kaddr, PAGE_SIZE); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1451 1452 |
kunmap(page); page_cache_release(page); |
e6c1baa9b convert the rest ... |
1453 |
} else { |
9b56d5438 dump_skip(): dump... |
1454 |
res = dump_skip(cprm, PAGE_SIZE); |
e6c1baa9b convert the rest ... |
1455 1456 1457 |
} if (!res) return false; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1458 |
} |
e6c1baa9b convert the rest ... |
1459 1460 |
#else if (!dump_emit(cprm, (void *) vma->vm_start, |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1461 |
vma->vm_end - vma->vm_start)) |
e6c1baa9b convert the rest ... |
1462 1463 |
return false; #endif |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1464 |
} |
e6c1baa9b convert the rest ... |
1465 |
return true; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1466 |
} |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1467 |
|
8d9032bbe elf coredump: add... |
1468 1469 1470 1471 |
static size_t elf_core_vma_data_size(unsigned long mm_flags) { struct vm_area_struct *vma; size_t size = 0; |
47568d4c5 FDPIC: For-loop i... |
1472 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) |
8d9032bbe elf coredump: add... |
1473 1474 1475 1476 |
if (maydump(vma, mm_flags)) size += vma->vm_end - vma->vm_start; return size; } |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1477 1478 1479 1480 1481 1482 1483 |
/* * Actual dumper * * This is a two-pass process; first we find the offsets of the bits, * and then they are actually written out. If we run out of core limit * we just truncate. */ |
f6151dfea mm: introduce cor... |
1484 |
static int elf_fdpic_core_dump(struct coredump_params *cprm) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1485 1486 1487 1488 1489 |
{ #define NUM_NOTES 6 int has_dumped = 0; mm_segment_t fs; int segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1490 1491 1492 |
int i; struct vm_area_struct *vma; struct elfhdr *elf = NULL; |
9b56d5438 dump_skip(): dump... |
1493 |
loff_t offset = 0, dataoff; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1494 1495 1496 1497 |
int numnote; struct memelfnote *notes = NULL; struct elf_prstatus *prstatus = NULL; /* NT_PRSTATUS */ struct elf_prpsinfo *psinfo = NULL; /* NT_PRPSINFO */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1498 1499 1500 1501 1502 1503 1504 |
LIST_HEAD(thread_list); struct list_head *t; elf_fpregset_t *fpu = NULL; #ifdef ELF_CORE_COPY_XFPREGS elf_fpxregset_t *xfpu = NULL; #endif int thread_status_size = 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1505 |
elf_addr_t *auxv; |
93eb211e6 elf coredump: mak... |
1506 |
struct elf_phdr *phdr4note = NULL; |
8d9032bbe elf coredump: add... |
1507 1508 1509 |
struct elf_shdr *shdr4extnum = NULL; Elf_Half e_phnum; elf_addr_t e_shoff; |
afabada95 elf{,_fdpic} core... |
1510 1511 |
struct core_thread *ct; struct elf_thread_status *tmp; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 |
/* * We no longer stop all VM operations. * * This is because those proceses that could possibly change map_count * or the mmap / vma pages are now blocked in do_exit on current * finishing this core dump. * * Only ptrace can touch these memory addresses, but it doesn't change * the map_count or the pages allocated. So no possibility of crashing * exists while dumping the mm->vm_next areas to the core file. */ /* alloc memory for large data structures: too large to be on stack */ elf = kmalloc(sizeof(*elf), GFP_KERNEL); if (!elf) goto cleanup; prstatus = kzalloc(sizeof(*prstatus), GFP_KERNEL); if (!prstatus) goto cleanup; psinfo = kmalloc(sizeof(*psinfo), GFP_KERNEL); if (!psinfo) goto cleanup; notes = kmalloc(NUM_NOTES * sizeof(struct memelfnote), GFP_KERNEL); if (!notes) goto cleanup; fpu = kmalloc(sizeof(*fpu), GFP_KERNEL); if (!fpu) goto cleanup; #ifdef ELF_CORE_COPY_XFPREGS xfpu = kmalloc(sizeof(*xfpu), GFP_KERNEL); if (!xfpu) goto cleanup; #endif |
afabada95 elf{,_fdpic} core... |
1546 1547 1548 1549 1550 |
for (ct = current->mm->core_state->dumper.next; ct; ct = ct->next) { tmp = kzalloc(sizeof(*tmp), GFP_KERNEL); if (!tmp) goto cleanup; |
182c515fd coredump: elf_fdp... |
1551 |
|
afabada95 elf{,_fdpic} core... |
1552 1553 1554 |
tmp->thread = ct->task; list_add(&tmp->list, &thread_list); } |
182c515fd coredump: elf_fdp... |
1555 |
|
afabada95 elf{,_fdpic} core... |
1556 1557 1558 |
list_for_each(t, &thread_list) { struct elf_thread_status *tmp; int sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1559 |
|
afabada95 elf{,_fdpic} core... |
1560 1561 1562 |
tmp = list_entry(t, struct elf_thread_status, list); sz = elf_dump_thread_status(cprm->siginfo->si_signo, tmp); thread_status_size += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1563 1564 1565 |
} /* now collect the dump for the current */ |
5ab1c309b coredump: pass si... |
1566 |
fill_prstatus(prstatus, current, cprm->siginfo->si_signo); |
f6151dfea mm: introduce cor... |
1567 |
elf_core_copy_regs(&prstatus->pr_reg, cprm->regs); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1568 |
|
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1569 |
segs = current->mm->map_count; |
1fcccbac8 elf coredump: rep... |
1570 |
segs += elf_core_extra_phdrs(); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1571 |
|
8d9032bbe elf coredump: add... |
1572 1573 1574 1575 1576 1577 1578 |
/* for notes section */ segs++; /* If segs > PN_XNUM(0xffff), then e_phnum overflows. To avoid * this, kernel supports extended numbering. Have a look at * include/linux/elf.h for further information. */ e_phnum = segs > PN_XNUM ? PN_XNUM : segs; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1579 |
/* Set up header */ |
8d9032bbe elf coredump: add... |
1580 |
fill_elf_fdpic_header(elf, e_phnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1581 1582 |
has_dumped = 1; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 |
/* * Set up the notes in similar form to SVR4 core dumps made * with info from their /proc. */ fill_note(notes + 0, "CORE", NT_PRSTATUS, sizeof(*prstatus), prstatus); fill_psinfo(psinfo, current->group_leader, current->mm); fill_note(notes + 1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo); numnote = 2; auxv = (elf_addr_t *) current->mm->saved_auxv; i = 0; do i += 2; while (auxv[i - 2] != AT_NULL); fill_note(¬es[numnote++], "CORE", NT_AUXV, i * sizeof(elf_addr_t), auxv); /* Try to dump the FPU. */ if ((prstatus->pr_fpvalid = |
f6151dfea mm: introduce cor... |
1605 |
elf_core_copy_task_fpregs(current, cprm->regs, fpu))) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1606 1607 1608 1609 1610 |
fill_note(notes + numnote++, "CORE", NT_PRFPREG, sizeof(*fpu), fpu); #ifdef ELF_CORE_COPY_XFPREGS if (elf_core_copy_task_xfpregs(current, xfpu)) fill_note(notes + numnote++, |
5b20cd80b x86: replace NT_P... |
1611 |
"LINUX", ELF_CORE_XFPREG_TYPE, sizeof(*xfpu), xfpu); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1612 1613 1614 1615 |
#endif fs = get_fs(); set_fs(KERNEL_DS); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1616 |
offset += sizeof(*elf); /* Elf header */ |
8d9032bbe elf coredump: add... |
1617 |
offset += segs * sizeof(struct elf_phdr); /* Program headers */ |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1618 1619 1620 |
/* Write notes phdr entry */ { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1621 1622 1623 1624 1625 1626 |
int sz = 0; for (i = 0; i < numnote; i++) sz += notesize(notes + i); sz += thread_status_size; |
93eb211e6 elf coredump: mak... |
1627 1628 |
phdr4note = kmalloc(sizeof(*phdr4note), GFP_KERNEL); if (!phdr4note) |
088e7af73 coredump: move du... |
1629 |
goto end_coredump; |
93eb211e6 elf coredump: mak... |
1630 1631 1632 |
fill_elf_note_phdr(phdr4note, sz, offset); offset += sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1633 1634 1635 1636 |
} /* Page-align dumped data */ dataoff = offset = roundup(offset, ELF_EXEC_PAGESIZE); |
30736a4d4 coredump: pass mm... |
1637 |
offset += elf_core_vma_data_size(cprm->mm_flags); |
8d9032bbe elf coredump: add... |
1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 |
offset += elf_core_extra_data_size(); e_shoff = offset; if (e_phnum == PN_XNUM) { shdr4extnum = kmalloc(sizeof(*shdr4extnum), GFP_KERNEL); if (!shdr4extnum) goto end_coredump; fill_extnum_info(elf, shdr4extnum, e_shoff, segs); } offset = dataoff; |
e6c1baa9b convert the rest ... |
1649 |
if (!dump_emit(cprm, elf, sizeof(*elf))) |
93eb211e6 elf coredump: mak... |
1650 |
goto end_coredump; |
e6c1baa9b convert the rest ... |
1651 |
if (!dump_emit(cprm, phdr4note, sizeof(*phdr4note))) |
93eb211e6 elf coredump: mak... |
1652 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1653 |
/* write program headers for segments dump */ |
8feae1311 NOMMU: Make VMAs ... |
1654 |
for (vma = current->mm->mmap; vma; vma = vma->vm_next) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1655 1656 |
struct elf_phdr phdr; size_t sz; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1657 1658 1659 1660 1661 1662 |
sz = vma->vm_end - vma->vm_start; phdr.p_type = PT_LOAD; phdr.p_offset = offset; phdr.p_vaddr = vma->vm_start; phdr.p_paddr = 0; |
30736a4d4 coredump: pass mm... |
1663 |
phdr.p_filesz = maydump(vma, cprm->mm_flags) ? sz : 0; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1664 1665 1666 1667 1668 1669 1670 1671 |
phdr.p_memsz = sz; offset += phdr.p_filesz; phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0; if (vma->vm_flags & VM_WRITE) phdr.p_flags |= PF_W; if (vma->vm_flags & VM_EXEC) phdr.p_flags |= PF_X; phdr.p_align = ELF_EXEC_PAGESIZE; |
e6c1baa9b convert the rest ... |
1672 |
if (!dump_emit(cprm, &phdr, sizeof(phdr))) |
088e7af73 coredump: move du... |
1673 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1674 |
} |
506f21c55 switch elf_core_w... |
1675 |
if (!elf_core_write_extra_phdrs(cprm, offset)) |
1fcccbac8 elf coredump: rep... |
1676 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1677 1678 1679 |
/* write out the notes section */ for (i = 0; i < numnote; i++) |
e6c1baa9b convert the rest ... |
1680 |
if (!writenote(notes + i, cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1681 1682 1683 1684 1685 1686 1687 1688 |
goto end_coredump; /* write out the thread status notes section */ list_for_each(t, &thread_list) { struct elf_thread_status *tmp = list_entry(t, struct elf_thread_status, list); for (i = 0; i < tmp->num_notes; i++) |
e6c1baa9b convert the rest ... |
1689 |
if (!writenote(&tmp->notes[i], cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1690 1691 |
goto end_coredump; } |
9b56d5438 dump_skip(): dump... |
1692 |
if (!dump_skip(cprm, dataoff - cprm->written)) |
f3e8fccd0 mm: add get_dump_... |
1693 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1694 |
|
e6c1baa9b convert the rest ... |
1695 |
if (!elf_fdpic_dump_segments(cprm)) |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1696 |
goto end_coredump; |
aa3e7eaf0 switch elf_core_w... |
1697 |
if (!elf_core_write_extra_data(cprm)) |
1fcccbac8 elf coredump: rep... |
1698 |
goto end_coredump; |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1699 |
|
8d9032bbe elf coredump: add... |
1700 |
if (e_phnum == PN_XNUM) { |
e6c1baa9b convert the rest ... |
1701 |
if (!dump_emit(cprm, shdr4extnum, sizeof(*shdr4extnum))) |
8d9032bbe elf coredump: add... |
1702 1703 |
goto end_coredump; } |
2f48912d1 binfmt_elf_fdpic:... |
1704 |
if (cprm->file->f_pos != offset) { |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1705 1706 1707 1708 |
/* Sanity check */ printk(KERN_WARNING "elf_core_dump: file->f_pos (%lld) != offset (%lld) ", |
2f48912d1 binfmt_elf_fdpic:... |
1709 |
cprm->file->f_pos, offset); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 |
} end_coredump: set_fs(fs); cleanup: while (!list_empty(&thread_list)) { struct list_head *tmp = thread_list.next; list_del(tmp); kfree(list_entry(tmp, struct elf_thread_status, list)); } |
93eb211e6 elf coredump: mak... |
1721 |
kfree(phdr4note); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1722 1723 1724 1725 1726 |
kfree(elf); kfree(prstatus); kfree(psinfo); kfree(notes); kfree(fpu); |
bcb65a797 FDPIC: Fix memory... |
1727 |
kfree(shdr4extnum); |
6d8c4e3b0 [PATCH] FDPIC: Ad... |
1728 1729 1730 1731 1732 1733 |
#ifdef ELF_CORE_COPY_XFPREGS kfree(xfpu); #endif return has_dumped; #undef NUM_NOTES } |
698ba7b5a elf: kill USE_ELF... |
1734 |
#endif /* CONFIG_ELF_CORE */ |