125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Standard libdwfl callbacks for debugging the running Linux kernel. 225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Copyright (C) 2005-2011 Red Hat, Inc. 325b3c049e70834cf33790a28643ab058b507b35cBen Cheng This file is part of Red Hat elfutils. 425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 525b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 625b3c049e70834cf33790a28643ab058b507b35cBen Cheng it under the terms of the GNU General Public License as published by the 725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Free Software Foundation; version 2 of the License. 825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 1025b3c049e70834cf33790a28643ab058b507b35cBen Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 1125b3c049e70834cf33790a28643ab058b507b35cBen Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 1225b3c049e70834cf33790a28643ab058b507b35cBen Cheng General Public License for more details. 1325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1425b3c049e70834cf33790a28643ab058b507b35cBen Cheng You should have received a copy of the GNU General Public License along 1525b3c049e70834cf33790a28643ab058b507b35cBen Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 1625b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 1725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 1825b3c049e70834cf33790a28643ab058b507b35cBen Cheng In addition, as a special exception, Red Hat, Inc. gives You the 1925b3c049e70834cf33790a28643ab058b507b35cBen Cheng additional right to link the code of Red Hat elfutils with code licensed 2025b3c049e70834cf33790a28643ab058b507b35cBen Cheng under any Open Source Initiative certified open source license 2125b3c049e70834cf33790a28643ab058b507b35cBen Cheng (http://www.opensource.org/licenses/index.php) which requires the 2225b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribution of source code with any binary distribution and to 2325b3c049e70834cf33790a28643ab058b507b35cBen Cheng distribute linked combinations of the two. Non-GPL Code permitted under 2425b3c049e70834cf33790a28643ab058b507b35cBen Cheng this exception must only link to the code of Red Hat elfutils through 2525b3c049e70834cf33790a28643ab058b507b35cBen Cheng those well defined interfaces identified in the file named EXCEPTION 2625b3c049e70834cf33790a28643ab058b507b35cBen Cheng found in the source code files (the "Approved Interfaces"). The files 2725b3c049e70834cf33790a28643ab058b507b35cBen Cheng of Non-GPL Code may instantiate templates or use macros or inline 2825b3c049e70834cf33790a28643ab058b507b35cBen Cheng functions from the Approved Interfaces without causing the resulting 2925b3c049e70834cf33790a28643ab058b507b35cBen Cheng work to be covered by the GNU General Public License. Only Red Hat, 3025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Inc. may make changes or additions to the list of Approved Interfaces. 3125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat's grant of this exception is conditioned upon your not adding 3225b3c049e70834cf33790a28643ab058b507b35cBen Cheng any new exceptions. If you wish to add a new Approved Interface or 3325b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception, please contact Red Hat. You must obey the GNU General Public 3425b3c049e70834cf33790a28643ab058b507b35cBen Cheng License in all respects for all of the Red Hat elfutils code and other 3525b3c049e70834cf33790a28643ab058b507b35cBen Cheng code used in conjunction with Red Hat elfutils except the Non-GPL Code 3625b3c049e70834cf33790a28643ab058b507b35cBen Cheng covered by this exception. If you modify this file, you may extend this 3725b3c049e70834cf33790a28643ab058b507b35cBen Cheng exception to your version of the file, but you are not obligated to do 3825b3c049e70834cf33790a28643ab058b507b35cBen Cheng so. If you do not wish to provide this exception without modification, 3925b3c049e70834cf33790a28643ab058b507b35cBen Cheng you must delete this exception statement from your version and license 4025b3c049e70834cf33790a28643ab058b507b35cBen Cheng this file solely under the GPL without exception. 4125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 4225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Red Hat elfutils is an included package of the Open Invention Network. 4325b3c049e70834cf33790a28643ab058b507b35cBen Cheng An included package of the Open Invention Network is a package for which 4425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Open Invention Network licensees cross-license their patents. No patent 4525b3c049e70834cf33790a28643ab058b507b35cBen Cheng license is granted, either expressly or impliedly, by designation as an 4625b3c049e70834cf33790a28643ab058b507b35cBen Cheng included package. Should you wish to participate in the Open Invention 4725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Network licensing program, please visit www.openinventionnetwork.com 4825b3c049e70834cf33790a28643ab058b507b35cBen Cheng <http://www.openinventionnetwork.com>. */ 4925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5025b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* We include this before config.h because it can't handle _FILE_OFFSET_BITS. 5125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Everything we need here is fine if its declarations just come first. */ 5225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 538701663f8720eaae76448f5d61890e142a67eba1Ben Cheng/* TODO ANDROID - defined in AndroidConfig.h. */ 548701663f8720eaae76448f5d61890e142a67eba1Ben Cheng#undef _FILE_OFFSET_BITS 558701663f8720eaae76448f5d61890e142a67eba1Ben Cheng 5625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <fts.h> 5725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 5825b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <config.h> 5925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 6025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include "libdwflP.h" 6125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <inttypes.h> 6225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <errno.h> 6325b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <stdio.h> 6425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <stdio_ext.h> 6525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <string.h> 6625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <stdlib.h> 6725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <sys/utsname.h> 6825b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <fcntl.h> 6925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#include <unistd.h> 7025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define KERNEL_MODNAME "kernel" 7325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define MODULEDIRFMT "/lib/modules/%s" 7525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 7625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define KNOTESFILE "/sys/kernel/notes" 7725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define MODNOTESFMT "/sys/module/%s/notes" 7825b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define KSYMSFILE "/proc/kallsyms" 7925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define MODULELIST "/proc/modules" 8025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define SECADDRDIRFMT "/sys/module/%s/sections/" 8125b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define MODULE_SECT_NAME_LEN 32 /* Minimum any linux/module.h has had. */ 8225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 8425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#if defined (USE_ZLIB) || defined (USE_BZLIB) || defined (USE_LZMA) 8525b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic const char *vmlinux_suffixes[] = 8625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 8725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef USE_ZLIB 8825b3c049e70834cf33790a28643ab058b507b35cBen Cheng ".gz", 8925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 9025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef USE_BZLIB 9125b3c049e70834cf33790a28643ab058b507b35cBen Cheng ".bz2", 9225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 9325b3c049e70834cf33790a28643ab058b507b35cBen Cheng#ifdef USE_LZMA 9425b3c049e70834cf33790a28643ab058b507b35cBen Cheng ".xz", 9525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 9625b3c049e70834cf33790a28643ab058b507b35cBen Cheng }; 9725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 9825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 9925b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Try to open the given file as it is or under the debuginfo directory. */ 10025b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 10125b3c049e70834cf33790a28643ab058b507b35cBen Chengtry_kernel_name (Dwfl *dwfl, char **fname, bool try_debug) 10225b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 10325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (*fname == NULL) 10425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 10525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 10625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Don't bother trying *FNAME itself here if the path will cause it to be 10725b3c049e70834cf33790a28643ab058b507b35cBen Cheng tried because we give its own basename as DEBUGLINK_FILE. */ 10825b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = ((((dwfl->callbacks->debuginfo_path 10925b3c049e70834cf33790a28643ab058b507b35cBen Cheng ? *dwfl->callbacks->debuginfo_path : NULL) 11025b3c049e70834cf33790a28643ab058b507b35cBen Cheng ?: DEFAULT_DEBUGINFO_PATH)[0] == ':') ? -1 11125b3c049e70834cf33790a28643ab058b507b35cBen Cheng : TEMP_FAILURE_RETRY (open64 (*fname, O_RDONLY))); 11225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 11325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 11425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 11525b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *debugfname = NULL; 11625b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module fakemod = { .dwfl = dwfl }; 11725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* First try the file's unadorned basename as DEBUGLINK_FILE, 11825b3c049e70834cf33790a28643ab058b507b35cBen Cheng to look for "vmlinux" files. */ 11925b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = INTUSE(dwfl_standard_find_debuginfo) (&fakemod, NULL, NULL, 0, 12025b3c049e70834cf33790a28643ab058b507b35cBen Cheng *fname, basename (*fname), 0, 12125b3c049e70834cf33790a28643ab058b507b35cBen Cheng &debugfname); 12225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0 && try_debug) 12325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Next, let the call use the default of basename + ".debug", 12425b3c049e70834cf33790a28643ab058b507b35cBen Cheng to look for "vmlinux.debug" files. */ 12525b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = INTUSE(dwfl_standard_find_debuginfo) (&fakemod, NULL, NULL, 0, 12625b3c049e70834cf33790a28643ab058b507b35cBen Cheng *fname, NULL, 0, 12725b3c049e70834cf33790a28643ab058b507b35cBen Cheng &debugfname); 12825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (debugfname != NULL) 12925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 13025b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*fname); 13125b3c049e70834cf33790a28643ab058b507b35cBen Cheng *fname = debugfname; 13225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 13325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 13425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 13525b3c049e70834cf33790a28643ab058b507b35cBen Cheng#if defined (USE_ZLIB) || defined (USE_BZLIB) || defined (USE_LZMA) 13625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 13725b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t i = 0; 13825b3c049e70834cf33790a28643ab058b507b35cBen Cheng i < sizeof vmlinux_suffixes / sizeof vmlinux_suffixes[0]; 13925b3c049e70834cf33790a28643ab058b507b35cBen Cheng ++i) 14025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 14125b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *zname; 14225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&zname, "%s%s", *fname, vmlinux_suffixes[i]) > 0) 14325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 14425b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = TEMP_FAILURE_RETRY (open64 (zname, O_RDONLY)); 14525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 14625b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (zname); 14725b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 14825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 14925b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*fname); 15025b3c049e70834cf33790a28643ab058b507b35cBen Cheng *fname = zname; 15125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 15425b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 15525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 15625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 15725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 15825b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*fname); 15925b3c049e70834cf33790a28643ab058b507b35cBen Cheng *fname = NULL; 16025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 16125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 16225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 16325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 16425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 16525b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic inline const char * 16625b3c049e70834cf33790a28643ab058b507b35cBen Chengkernel_release (void) 16725b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 16825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Cache the `uname -r` string we'll use. */ 16925b3c049e70834cf33790a28643ab058b507b35cBen Cheng static struct utsname utsname; 17025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (utsname.release[0] == '\0' && uname (&utsname) != 0) 17125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return NULL; 17225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return utsname.release; 17325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 17425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 17525b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 17625b3c049e70834cf33790a28643ab058b507b35cBen Chengfind_kernel_elf (Dwfl *dwfl, const char *release, char **fname) 17725b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 17825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if ((release[0] == '/' 17925b3c049e70834cf33790a28643ab058b507b35cBen Cheng ? asprintf (fname, "%s/vmlinux", release) 18025b3c049e70834cf33790a28643ab058b507b35cBen Cheng : asprintf (fname, "/boot/vmlinux-%s", release)) < 0) 18125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 18225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 18325b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = try_kernel_name (dwfl, fname, true); 18425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0 && release[0] != '/') 18525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 18625b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*fname); 18725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (fname, MODULEDIRFMT "/vmlinux", release) < 0) 18825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 18925b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = try_kernel_name (dwfl, fname, true); 19025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 19125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 19225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 19325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 19425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 19525b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 19625b3c049e70834cf33790a28643ab058b507b35cBen Chengget_release (Dwfl *dwfl, const char **release) 19725b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 19825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (dwfl == NULL) 19925b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 20025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 20125b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *release_string = release == NULL ? NULL : *release; 20225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (release_string == NULL) 20325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 20425b3c049e70834cf33790a28643ab058b507b35cBen Cheng release_string = kernel_release (); 20525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (release_string == NULL) 20625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 20725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (release != NULL) 20825b3c049e70834cf33790a28643ab058b507b35cBen Cheng *release = release_string; 20925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 21025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 21125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 21225b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 21325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 21425b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 21525b3c049e70834cf33790a28643ab058b507b35cBen Chengreport_kernel (Dwfl *dwfl, const char **release, 21625b3c049e70834cf33790a28643ab058b507b35cBen Cheng int (*predicate) (const char *module, const char *file)) 21725b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 21825b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = get_release (dwfl, release); 21925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (result != 0)) 22025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 22125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 22225b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *fname; 22325b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = find_kernel_elf (dwfl, *release, &fname); 22425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 22525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 22625b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = ((predicate != NULL && !(*predicate) (KERNEL_MODNAME, NULL)) 22725b3c049e70834cf33790a28643ab058b507b35cBen Cheng ? 0 : errno ?: ENOENT); 22825b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 22925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 23025b3c049e70834cf33790a28643ab058b507b35cBen Cheng bool report = true; 23125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 23225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (predicate != NULL) 23325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 23425b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Let the predicate decide whether to use this one. */ 23525b3c049e70834cf33790a28643ab058b507b35cBen Cheng int want = (*predicate) (KERNEL_MODNAME, fname); 23625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (want < 0) 23725b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = errno; 23825b3c049e70834cf33790a28643ab058b507b35cBen Cheng report = want > 0; 23925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 24025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 24125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (report) 24225b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 24325b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module *mod = INTUSE(dwfl_report_elf) (dwfl, KERNEL_MODNAME, 24425b3c049e70834cf33790a28643ab058b507b35cBen Cheng fname, fd, 0); 24525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (mod == NULL) 24625b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 24725b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 24825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The kernel is ET_EXEC, but always treat it as relocatable. */ 24925b3c049e70834cf33790a28643ab058b507b35cBen Cheng mod->e_type = ET_DYN; 25025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 25125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 25225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!report || result < 0) 25325b3c049e70834cf33790a28643ab058b507b35cBen Cheng close (fd); 25425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 25525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 25625b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (fname); 25725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 25825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 25925b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 26025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 26125b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Look for a kernel debug archive. If we find one, report all its modules. 26225b3c049e70834cf33790a28643ab058b507b35cBen Cheng If not, return ENOENT. */ 26325b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 26425b3c049e70834cf33790a28643ab058b507b35cBen Chengreport_kernel_archive (Dwfl *dwfl, const char **release, 26525b3c049e70834cf33790a28643ab058b507b35cBen Cheng int (*predicate) (const char *module, const char *file)) 26625b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 26725b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = get_release (dwfl, release); 26825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (result != 0)) 26925b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 27025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 27125b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *archive; 27225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely ((*release)[0] == '/' 27325b3c049e70834cf33790a28643ab058b507b35cBen Cheng ? asprintf (&archive, "%s/debug.a", *release) 27425b3c049e70834cf33790a28643ab058b507b35cBen Cheng : asprintf (&archive, MODULEDIRFMT "/debug.a", *release)) < 0) 27525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return ENOMEM; 27625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 27725b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = try_kernel_name (dwfl, &archive, false); 27825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 27925b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = errno ?: ENOENT; 28025b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 28125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 28225b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We have the archive file open! */ 28325b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module *last = __libdwfl_report_offline (dwfl, NULL, archive, fd, 28425b3c049e70834cf33790a28643ab058b507b35cBen Cheng true, predicate); 28525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (unlikely (last == NULL)) 28625b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 28725b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 28825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 28925b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Find the kernel and move it to the head of the list. */ 29025b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module **tailp = &dwfl->modulelist, **prevp = tailp; 29125b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (Dwfl_Module *m = *prevp; m != NULL; m = *(prevp = &m->next)) 29225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!m->gc && m->e_type != ET_REL && !strcmp (m->name, "kernel")) 29325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 29425b3c049e70834cf33790a28643ab058b507b35cBen Cheng *prevp = m->next; 29525b3c049e70834cf33790a28643ab058b507b35cBen Cheng m->next = *tailp; 29625b3c049e70834cf33790a28643ab058b507b35cBen Cheng *tailp = m; 29725b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 29825b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 29925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 30025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 30125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 30225b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (archive); 30325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 30425b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 30525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 30625b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic size_t 30725b3c049e70834cf33790a28643ab058b507b35cBen Chengcheck_suffix (const FTSENT *f, size_t namelen) 30825b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 30925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#define TRY(sfx) \ 31025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if ((namelen ? f->fts_namelen == namelen + sizeof sfx - 1 \ 31125b3c049e70834cf33790a28643ab058b507b35cBen Cheng : f->fts_namelen >= sizeof sfx) \ 31225b3c049e70834cf33790a28643ab058b507b35cBen Cheng && !memcmp (f->fts_name + f->fts_namelen - (sizeof sfx - 1), \ 31325b3c049e70834cf33790a28643ab058b507b35cBen Cheng sfx, sizeof sfx)) \ 31425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return sizeof sfx - 1 31525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 31625b3c049e70834cf33790a28643ab058b507b35cBen Cheng TRY (".ko"); 31725b3c049e70834cf33790a28643ab058b507b35cBen Cheng#if USE_ZLIB 31825b3c049e70834cf33790a28643ab058b507b35cBen Cheng TRY (".ko.gz"); 31925b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 32025b3c049e70834cf33790a28643ab058b507b35cBen Cheng#if USE_BZLIB 32125b3c049e70834cf33790a28643ab058b507b35cBen Cheng TRY (".ko.bz2"); 32225b3c049e70834cf33790a28643ab058b507b35cBen Cheng#endif 32325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 32425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 32525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 32625b3c049e70834cf33790a28643ab058b507b35cBen Cheng#undef TRY 32725b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 32825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 32925b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Report a kernel and all its modules found on disk, for offline use. 33025b3c049e70834cf33790a28643ab058b507b35cBen Cheng If RELEASE starts with '/', it names a directory to look in; 33125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if not, it names a directory to find under /lib/modules/; 33225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if null, /lib/modules/`uname -r` is used. 33325b3c049e70834cf33790a28643ab058b507b35cBen Cheng Returns zero on success, -1 if dwfl_report_module failed, 33425b3c049e70834cf33790a28643ab058b507b35cBen Cheng or an errno code if finding the files on disk failed. */ 33525b3c049e70834cf33790a28643ab058b507b35cBen Chengint 33625b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_linux_kernel_report_offline (Dwfl *dwfl, const char *release, 33725b3c049e70834cf33790a28643ab058b507b35cBen Cheng int (*predicate) (const char *module, 33825b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *file)) 33925b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 34025b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = report_kernel_archive (dwfl, &release, predicate); 34125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result != ENOENT) 34225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 34325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 34425b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* First report the kernel. */ 34525b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = report_kernel (dwfl, &release, predicate); 34625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == 0) 34725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 34825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Do "find /lib/modules/RELEASE -name *.ko". */ 34925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 35025b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *modulesdir[] = { NULL, NULL }; 35125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (release[0] == '/') 35225b3c049e70834cf33790a28643ab058b507b35cBen Cheng modulesdir[0] = (char *) release; 35325b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 35425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 35525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&modulesdir[0], MODULEDIRFMT, release) < 0) 35625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 35725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 35825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 35925b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTS *fts = fts_open (modulesdir, FTS_NOSTAT | FTS_LOGICAL, NULL); 36025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (modulesdir[0] == (char *) release) 36125b3c049e70834cf33790a28643ab058b507b35cBen Cheng modulesdir[0] = NULL; 36225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fts == NULL) 36325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 36425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (modulesdir[0]); 36525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 36625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 36725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 36825b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTSENT *f; 36925b3c049e70834cf33790a28643ab058b507b35cBen Cheng while ((f = fts_read (fts)) != NULL) 37025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 37125b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Skip a "source" subtree, which tends to be large. 37225b3c049e70834cf33790a28643ab058b507b35cBen Cheng This insane hard-coding of names is what depmod does too. */ 37325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f->fts_namelen == sizeof "source" - 1 37425b3c049e70834cf33790a28643ab058b507b35cBen Cheng && !strcmp (f->fts_name, "source")) 37525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 37625b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_set (fts, f, FTS_SKIP); 37725b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 37825b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 37925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 38025b3c049e70834cf33790a28643ab058b507b35cBen Cheng switch (f->fts_info) 38125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 38225b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_F: 38325b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SL: 38425b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NSOK:; 38525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* See if this file name matches "*.ko". */ 38625b3c049e70834cf33790a28643ab058b507b35cBen Cheng const size_t suffix = check_suffix (f, 0); 38725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (suffix) 38825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 38925b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We have a .ko file to report. Following the algorithm 39025b3c049e70834cf33790a28643ab058b507b35cBen Cheng by which the kernel makefiles set KBUILD_MODNAME, we 39125b3c049e70834cf33790a28643ab058b507b35cBen Cheng replace all ',' or '-' with '_' in the file name and 39225b3c049e70834cf33790a28643ab058b507b35cBen Cheng call that the module name. Modules could well be 39325b3c049e70834cf33790a28643ab058b507b35cBen Cheng built using different embedded names than their file 39425b3c049e70834cf33790a28643ab058b507b35cBen Cheng names. To handle that, we would have to look at the 39525b3c049e70834cf33790a28643ab058b507b35cBen Cheng __this_module.name contents in the module's text. */ 39625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 39725b3c049e70834cf33790a28643ab058b507b35cBen Cheng char name[f->fts_namelen - suffix + 1]; 39825b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (size_t i = 0; i < f->fts_namelen - 3U; ++i) 39925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f->fts_name[i] == '-' || f->fts_name[i] == ',') 40025b3c049e70834cf33790a28643ab058b507b35cBen Cheng name[i] = '_'; 40125b3c049e70834cf33790a28643ab058b507b35cBen Cheng else 40225b3c049e70834cf33790a28643ab058b507b35cBen Cheng name[i] = f->fts_name[i]; 40325b3c049e70834cf33790a28643ab058b507b35cBen Cheng name[f->fts_namelen - suffix] = '\0'; 40425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 40525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (predicate != NULL) 40625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 40725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Let the predicate decide whether to use this one. */ 40825b3c049e70834cf33790a28643ab058b507b35cBen Cheng int want = (*predicate) (name, f->fts_path); 40925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (want < 0) 41025b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 41125b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 41225b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 41325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 41425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!want) 41525b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 41625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 41725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 41825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (dwfl_report_offline (dwfl, name, f->fts_path, -1) == NULL) 41925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 42025b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 42125b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 42225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 42325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 42425b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 42525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 42625b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_ERR: 42725b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_DNR: 42825b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NS: 42925b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = f->fts_errno; 43025b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 43125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 43225b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SLNONE: 43325b3c049e70834cf33790a28643ab058b507b35cBen Cheng default: 43425b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 43525b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 43625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 43725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We only get here in error cases. */ 43825b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 43925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 44025b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_close (fts); 44125b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (modulesdir[0]); 44225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 44325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 44425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 44525b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 44625b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_linux_kernel_report_offline) 44725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 44825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 44925b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Grovel around to guess the bounds of the runtime kernel image. */ 45025b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 45125b3c049e70834cf33790a28643ab058b507b35cBen Chengintuit_kernel_bounds (Dwarf_Addr *start, Dwarf_Addr *end, Dwarf_Addr *notes) 45225b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 45325b3c049e70834cf33790a28643ab058b507b35cBen Cheng FILE *f = fopen (KSYMSFILE, "r"); 45425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f == NULL) 45525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 45625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 45725b3c049e70834cf33790a28643ab058b507b35cBen Cheng (void) __fsetlocking (f, FSETLOCKING_BYCALLER); 45825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 45925b3c049e70834cf33790a28643ab058b507b35cBen Cheng *notes = 0; 46025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 46125b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *line = NULL; 46225b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t linesz = 0; 46325b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t n; 46425b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *p = NULL; 46525b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *type; 46625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 46725b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline bool read_address (Dwarf_Addr *addr) 46825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 46925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if ((n = getline (&line, &linesz, f)) < 1 || line[n - 2] == ']') 47025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 47125b3c049e70834cf33790a28643ab058b507b35cBen Cheng *addr = strtoull (line, &p, 16); 47225b3c049e70834cf33790a28643ab058b507b35cBen Cheng p += strspn (p, " \t"); 47325b3c049e70834cf33790a28643ab058b507b35cBen Cheng type = strsep (&p, " \t\n"); 47425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (type == NULL) 47525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 47625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return p != NULL && p != line; 47725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 47825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 47925b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result; 48025b3c049e70834cf33790a28643ab058b507b35cBen Cheng do 48125b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = read_address (start) ? 0 : -1; 48225b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (result == 0 && strchr ("TtRr", *type) == NULL); 48325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 48425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == 0) 48525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 48625b3c049e70834cf33790a28643ab058b507b35cBen Cheng *end = *start; 48725b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (read_address (end)) 48825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (*notes == 0 && !strcmp (p, "__start_notes\n")) 48925b3c049e70834cf33790a28643ab058b507b35cBen Cheng *notes = *end; 49025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 49125b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr round_kernel = sysconf (_SC_PAGE_SIZE); 49225b3c049e70834cf33790a28643ab058b507b35cBen Cheng *start &= -(Dwarf_Addr) round_kernel; 49325b3c049e70834cf33790a28643ab058b507b35cBen Cheng *end += round_kernel - 1; 49425b3c049e70834cf33790a28643ab058b507b35cBen Cheng *end &= -(Dwarf_Addr) round_kernel; 49525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (*start >= *end || *end - *start < round_kernel) 49625b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 49725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 49825b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (line); 49925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 50025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == -1) 50125b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = ferror_unlocked (f) ? errno : ENOEXEC; 50225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 50325b3c049e70834cf33790a28643ab058b507b35cBen Cheng fclose (f); 50425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 50525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 50625b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 50725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 50825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 50925b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Look for a build ID note in NOTESFILE and associate the ID with MOD. */ 51025b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 51125b3c049e70834cf33790a28643ab058b507b35cBen Chengcheck_notes (Dwfl_Module *mod, const char *notesfile, 51225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr vaddr, const char *secname) 51325b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 51425b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = open64 (notesfile, O_RDONLY); 51525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 51625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 1; 51725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 51825b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (Elf32_Nhdr) == sizeof (GElf_Nhdr)); 51925b3c049e70834cf33790a28643ab058b507b35cBen Cheng assert (sizeof (Elf64_Nhdr) == sizeof (GElf_Nhdr)); 52025b3c049e70834cf33790a28643ab058b507b35cBen Cheng union 52125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 52225b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Nhdr nhdr; 52325b3c049e70834cf33790a28643ab058b507b35cBen Cheng unsigned char data[8192]; 52425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } buf; 52525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 52625b3c049e70834cf33790a28643ab058b507b35cBen Cheng ssize_t n = read (fd, buf.data, sizeof buf); 52725b3c049e70834cf33790a28643ab058b507b35cBen Cheng close (fd); 52825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 52925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (n <= 0) 53025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 1; 53125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 53225b3c049e70834cf33790a28643ab058b507b35cBen Cheng unsigned char *p = buf.data; 53325b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (p < &buf.data[n]) 53425b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 53525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* No translation required since we are reading the native kernel. */ 53625b3c049e70834cf33790a28643ab058b507b35cBen Cheng GElf_Nhdr *nhdr = (void *) p; 53725b3c049e70834cf33790a28643ab058b507b35cBen Cheng p += sizeof *nhdr; 53825b3c049e70834cf33790a28643ab058b507b35cBen Cheng unsigned char *name = p; 53925b3c049e70834cf33790a28643ab058b507b35cBen Cheng p += (nhdr->n_namesz + 3) & -4U; 54025b3c049e70834cf33790a28643ab058b507b35cBen Cheng unsigned char *bits = p; 54125b3c049e70834cf33790a28643ab058b507b35cBen Cheng p += (nhdr->n_descsz + 3) & -4U; 54225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 54325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (p <= &buf.data[n] 54425b3c049e70834cf33790a28643ab058b507b35cBen Cheng && nhdr->n_type == NT_GNU_BUILD_ID 54525b3c049e70834cf33790a28643ab058b507b35cBen Cheng && nhdr->n_namesz == sizeof "GNU" 54625b3c049e70834cf33790a28643ab058b507b35cBen Cheng && !memcmp (name, "GNU", sizeof "GNU")) 54725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 54825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Found it. For a module we must figure out its VADDR now. */ 54925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 55025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (secname != NULL 55125b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (INTUSE(dwfl_linux_kernel_module_section_address) 55225b3c049e70834cf33790a28643ab058b507b35cBen Cheng (mod, NULL, mod->name, 0, secname, 0, NULL, &vaddr) != 0 55325b3c049e70834cf33790a28643ab058b507b35cBen Cheng || vaddr == (GElf_Addr) -1l)) 55425b3c049e70834cf33790a28643ab058b507b35cBen Cheng vaddr = 0; 55525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 55625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (vaddr != 0) 55725b3c049e70834cf33790a28643ab058b507b35cBen Cheng vaddr += bits - buf.data; 55825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return INTUSE(dwfl_module_report_build_id) (mod, bits, 55925b3c049e70834cf33790a28643ab058b507b35cBen Cheng nhdr->n_descsz, vaddr); 56025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 56125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 56225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 56325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 56425b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 56525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 56625b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Look for a build ID for the kernel. */ 56725b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 56825b3c049e70834cf33790a28643ab058b507b35cBen Chengcheck_kernel_notes (Dwfl_Module *kernelmod, GElf_Addr vaddr) 56925b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 57025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return check_notes (kernelmod, KNOTESFILE, vaddr, NULL) < 0 ? -1 : 0; 57125b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 57225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 57325b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Look for a build ID for a loaded kernel module. */ 57425b3c049e70834cf33790a28643ab058b507b35cBen Chengstatic int 57525b3c049e70834cf33790a28643ab058b507b35cBen Chengcheck_module_notes (Dwfl_Module *mod) 57625b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 57725b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *dirs[2] = { NULL, NULL }; 57825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&dirs[0], MODNOTESFMT, mod->name) < 0) 57925b3c049e70834cf33790a28643ab058b507b35cBen Cheng return ENOMEM; 58025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 58125b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTS *fts = fts_open (dirs, FTS_NOSTAT | FTS_LOGICAL, NULL); 58225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fts == NULL) 58325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 58425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (dirs[0]); 58525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return 0; 58625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 58725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 58825b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = 0; 58925b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTSENT *f; 59025b3c049e70834cf33790a28643ab058b507b35cBen Cheng while ((f = fts_read (fts)) != NULL) 59125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 59225b3c049e70834cf33790a28643ab058b507b35cBen Cheng switch (f->fts_info) 59325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 59425b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_F: 59525b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SL: 59625b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NSOK: 59725b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = check_notes (mod, f->fts_accpath, 0, f->fts_name); 59825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result > 0) /* Nothing found. */ 59925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 60025b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = 0; 60125b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 60225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 60325b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 60425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 60525b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_ERR: 60625b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_DNR: 60725b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = f->fts_errno; 60825b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 60925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 61025b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NS: 61125b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SLNONE: 61225b3c049e70834cf33790a28643ab058b507b35cBen Cheng default: 61325b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 61425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 61525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 61625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We only get here when finished or in error cases. */ 61725b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 61825b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 61925b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_close (fts); 62025b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (dirs[0]); 62125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 62225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 62325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 62425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 62525b3c049e70834cf33790a28643ab058b507b35cBen Chengint 62625b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_linux_kernel_report_kernel (Dwfl *dwfl) 62725b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 62825b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr start; 62925b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr end; 63025b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline Dwfl_Module *report (void) 63125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 63225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return INTUSE(dwfl_report_module) (dwfl, KERNEL_MODNAME, start, end); 63325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 63425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 63525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* This is a bit of a kludge. If we already reported the kernel, 63625b3c049e70834cf33790a28643ab058b507b35cBen Cheng don't bother figuring it out again--it never changes. */ 63725b3c049e70834cf33790a28643ab058b507b35cBen Cheng for (Dwfl_Module *m = dwfl->modulelist; m != NULL; m = m->next) 63825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!strcmp (m->name, KERNEL_MODNAME)) 63925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 64025b3c049e70834cf33790a28643ab058b507b35cBen Cheng start = m->low_addr; 64125b3c049e70834cf33790a28643ab058b507b35cBen Cheng end = m->high_addr; 64225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return report () == NULL ? -1 : 0; 64325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 64425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 64525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Try to figure out the bounds of the kernel image without 64625b3c049e70834cf33790a28643ab058b507b35cBen Cheng looking for any vmlinux file. */ 64725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr notes; 64825b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The compiler cannot deduce that if intuit_kernel_bounds returns 64925b3c049e70834cf33790a28643ab058b507b35cBen Cheng zero NOTES will be initialized. Fake the initialization. */ 65025b3c049e70834cf33790a28643ab058b507b35cBen Cheng asm ("" : "=m" (notes)); 65125b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = intuit_kernel_bounds (&start, &end, ¬es); 65225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == 0) 65325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 65425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module *mod = report (); 65525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return unlikely (mod == NULL) ? -1 : check_kernel_notes (mod, notes); 65625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 65725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result != ENOENT) 65825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 65925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 66025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Find the ELF file for the running kernel and dwfl_report_elf it. */ 66125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return report_kernel (dwfl, NULL, NULL); 66225b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 66325b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_linux_kernel_report_kernel) 66425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 66525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 66625b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Dwfl_Callbacks.find_elf for the running Linux kernel and its modules. */ 66725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 66825b3c049e70834cf33790a28643ab058b507b35cBen Chengint 66925b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_linux_kernel_find_elf (Dwfl_Module *mod, 67025b3c049e70834cf33790a28643ab058b507b35cBen Cheng void **userdata __attribute__ ((unused)), 67125b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *module_name, 67225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr base __attribute__ ((unused)), 67325b3c049e70834cf33790a28643ab058b507b35cBen Cheng char **file_name, Elf **elfp) 67425b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 67525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (mod->build_id_len > 0) 67625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 67725b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = INTUSE(dwfl_build_id_find_elf) (mod, NULL, NULL, 0, 67825b3c049e70834cf33790a28643ab058b507b35cBen Cheng file_name, elfp); 67925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd >= 0 || mod->main.elf != NULL || errno != 0) 68025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 68125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 68225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 68325b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *release = kernel_release (); 68425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (release == NULL) 68525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 68625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 68725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!strcmp (module_name, KERNEL_MODNAME)) 68825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return find_kernel_elf (mod->dwfl, release, file_name); 68925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 69025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Do "find /lib/modules/`uname -r` -name MODULE_NAME.ko". */ 69125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 69225b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *modulesdir[] = { NULL, NULL }; 69325b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&modulesdir[0], MODULEDIRFMT, release) < 0) 69425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 69525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 69625b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTS *fts = fts_open (modulesdir, FTS_NOSTAT | FTS_LOGICAL, NULL); 69725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fts == NULL) 69825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 69925b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (modulesdir[0]); 70025b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 70125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 70225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 70325b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t namelen = strlen (module_name); 70425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 70525b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* This is a kludge. There is no actual necessary relationship between 70625b3c049e70834cf33790a28643ab058b507b35cBen Cheng the name of the .ko file installed and the module name the kernel 70725b3c049e70834cf33790a28643ab058b507b35cBen Cheng knows it by when it's loaded. The kernel's only idea of the module 70825b3c049e70834cf33790a28643ab058b507b35cBen Cheng name comes from the name embedded in the object's magic 70925b3c049e70834cf33790a28643ab058b507b35cBen Cheng .gnu.linkonce.this_module section. 71025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 71125b3c049e70834cf33790a28643ab058b507b35cBen Cheng In practice, these module names match the .ko file names except for 71225b3c049e70834cf33790a28643ab058b507b35cBen Cheng some using '_' and some using '-'. So our cheap kludge is to look for 71325b3c049e70834cf33790a28643ab058b507b35cBen Cheng two files when either a '_' or '-' appears in a module name, one using 71425b3c049e70834cf33790a28643ab058b507b35cBen Cheng only '_' and one only using '-'. */ 71525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 71625b3c049e70834cf33790a28643ab058b507b35cBen Cheng char alternate_name[namelen + 1]; 71725b3c049e70834cf33790a28643ab058b507b35cBen Cheng inline bool subst_name (char from, char to) 71825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 71925b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *n = memchr (module_name, from, namelen); 72025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (n == NULL) 72125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return false; 72225b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *a = mempcpy (alternate_name, module_name, n - module_name); 72325b3c049e70834cf33790a28643ab058b507b35cBen Cheng *a++ = to; 72425b3c049e70834cf33790a28643ab058b507b35cBen Cheng ++n; 72525b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *p; 72625b3c049e70834cf33790a28643ab058b507b35cBen Cheng while ((p = memchr (n, from, namelen - (n - module_name))) != NULL) 72725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 72825b3c049e70834cf33790a28643ab058b507b35cBen Cheng a = mempcpy (a, n, p - n); 72925b3c049e70834cf33790a28643ab058b507b35cBen Cheng *a++ = to; 73025b3c049e70834cf33790a28643ab058b507b35cBen Cheng n = p + 1; 73125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 73225b3c049e70834cf33790a28643ab058b507b35cBen Cheng memcpy (a, n, namelen - (n - module_name) + 1); 73325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return true; 73425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 73525b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!subst_name ('-', '_') && !subst_name ('_', '-')) 73625b3c049e70834cf33790a28643ab058b507b35cBen Cheng alternate_name[0] = '\0'; 73725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 73825b3c049e70834cf33790a28643ab058b507b35cBen Cheng FTSENT *f; 73925b3c049e70834cf33790a28643ab058b507b35cBen Cheng int error = ENOENT; 74025b3c049e70834cf33790a28643ab058b507b35cBen Cheng while ((f = fts_read (fts)) != NULL) 74125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 74225b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* Skip a "source" subtree, which tends to be large. 74325b3c049e70834cf33790a28643ab058b507b35cBen Cheng This insane hard-coding of names is what depmod does too. */ 74425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f->fts_namelen == sizeof "source" - 1 74525b3c049e70834cf33790a28643ab058b507b35cBen Cheng && !strcmp (f->fts_name, "source")) 74625b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 74725b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_set (fts, f, FTS_SKIP); 74825b3c049e70834cf33790a28643ab058b507b35cBen Cheng continue; 74925b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 75025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 75125b3c049e70834cf33790a28643ab058b507b35cBen Cheng error = ENOENT; 75225b3c049e70834cf33790a28643ab058b507b35cBen Cheng switch (f->fts_info) 75325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 75425b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_F: 75525b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SL: 75625b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NSOK: 75725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* See if this file name is "MODULE_NAME.ko". */ 75825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (check_suffix (f, namelen) 75925b3c049e70834cf33790a28643ab058b507b35cBen Cheng && (!memcmp (f->fts_name, module_name, namelen) 76025b3c049e70834cf33790a28643ab058b507b35cBen Cheng || !memcmp (f->fts_name, alternate_name, namelen))) 76125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 76225b3c049e70834cf33790a28643ab058b507b35cBen Cheng int fd = open64 (f->fts_accpath, O_RDONLY); 76325b3c049e70834cf33790a28643ab058b507b35cBen Cheng *file_name = strdup (f->fts_path); 76425b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_close (fts); 76525b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (modulesdir[0]); 76625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (fd < 0) 76725b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (*file_name); 76825b3c049e70834cf33790a28643ab058b507b35cBen Cheng else if (*file_name == NULL) 76925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 77025b3c049e70834cf33790a28643ab058b507b35cBen Cheng close (fd); 77125b3c049e70834cf33790a28643ab058b507b35cBen Cheng fd = -1; 77225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 77325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return fd; 77425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 77525b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 77625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 77725b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_ERR: 77825b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_DNR: 77925b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_NS: 78025b3c049e70834cf33790a28643ab058b507b35cBen Cheng error = f->fts_errno; 78125b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 78225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 78325b3c049e70834cf33790a28643ab058b507b35cBen Cheng case FTS_SLNONE: 78425b3c049e70834cf33790a28643ab058b507b35cBen Cheng default: 78525b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 78625b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 78725b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 78825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 78925b3c049e70834cf33790a28643ab058b507b35cBen Cheng fts_close (fts); 79025b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (modulesdir[0]); 79125b3c049e70834cf33790a28643ab058b507b35cBen Cheng errno = error; 79225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return -1; 79325b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 79425b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_linux_kernel_find_elf) 79525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 79625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 79725b3c049e70834cf33790a28643ab058b507b35cBen Cheng/* Dwfl_Callbacks.section_address for kernel modules in the running Linux. 79825b3c049e70834cf33790a28643ab058b507b35cBen Cheng We read the information from /sys/module directly. */ 79925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 80025b3c049e70834cf33790a28643ab058b507b35cBen Chengint 80125b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_linux_kernel_module_section_address 80225b3c049e70834cf33790a28643ab058b507b35cBen Cheng(Dwfl_Module *mod __attribute__ ((unused)), 80325b3c049e70834cf33790a28643ab058b507b35cBen Cheng void **userdata __attribute__ ((unused)), 80425b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *modname, Dwarf_Addr base __attribute__ ((unused)), 80525b3c049e70834cf33790a28643ab058b507b35cBen Cheng const char *secname, Elf32_Word shndx __attribute__ ((unused)), 80625b3c049e70834cf33790a28643ab058b507b35cBen Cheng const GElf_Shdr *shdr __attribute__ ((unused)), 80725b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr *addr) 80825b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 80925b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *sysfile; 81025b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&sysfile, SECADDRDIRFMT "%s", modname, secname) < 0) 81125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_ABORT; 81225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 81325b3c049e70834cf33790a28643ab058b507b35cBen Cheng FILE *f = fopen (sysfile, "r"); 81425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (sysfile); 81525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 81625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f == NULL) 81725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 81825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (errno == ENOENT) 81925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 82025b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The .modinfo and .data.percpu sections are never kept 82125b3c049e70834cf33790a28643ab058b507b35cBen Cheng loaded in the kernel. If the kernel was compiled without 82225b3c049e70834cf33790a28643ab058b507b35cBen Cheng CONFIG_MODULE_UNLOAD, the .exit.* sections are not 82325b3c049e70834cf33790a28643ab058b507b35cBen Cheng actually loaded at all. 82425b3c049e70834cf33790a28643ab058b507b35cBen Cheng 82525b3c049e70834cf33790a28643ab058b507b35cBen Cheng Setting *ADDR to -1 tells the caller this section is 82625b3c049e70834cf33790a28643ab058b507b35cBen Cheng actually absent from memory. */ 82725b3c049e70834cf33790a28643ab058b507b35cBen Cheng 82825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (!strcmp (secname, ".modinfo") 82925b3c049e70834cf33790a28643ab058b507b35cBen Cheng || !strcmp (secname, ".data.percpu") 83025b3c049e70834cf33790a28643ab058b507b35cBen Cheng || !strncmp (secname, ".exit", 5)) 83125b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 83225b3c049e70834cf33790a28643ab058b507b35cBen Cheng *addr = (Dwarf_Addr) -1l; 83325b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_OK; 83425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 83525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 83625b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The goofy PPC64 module_frob_arch_sections function tweaks 83725b3c049e70834cf33790a28643ab058b507b35cBen Cheng the section names as a way to control other kernel code's 83825b3c049e70834cf33790a28643ab058b507b35cBen Cheng behavior, and this cruft leaks out into the /sys information. 83925b3c049e70834cf33790a28643ab058b507b35cBen Cheng The file name for ".init*" may actually look like "_init*". */ 84025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 84125b3c049e70834cf33790a28643ab058b507b35cBen Cheng const bool is_init = !strncmp (secname, ".init", 5); 84225b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (is_init) 84325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 84425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (asprintf (&sysfile, SECADDRDIRFMT "_%s", 84525b3c049e70834cf33790a28643ab058b507b35cBen Cheng modname, &secname[1]) < 0) 84625b3c049e70834cf33790a28643ab058b507b35cBen Cheng return ENOMEM; 84725b3c049e70834cf33790a28643ab058b507b35cBen Cheng f = fopen (sysfile, "r"); 84825b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (sysfile); 84925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f != NULL) 85025b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto ok; 85125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 85225b3c049e70834cf33790a28643ab058b507b35cBen Cheng 85325b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* The kernel truncates section names to MODULE_SECT_NAME_LEN - 1. 85425b3c049e70834cf33790a28643ab058b507b35cBen Cheng In case that size increases in the future, look for longer 85525b3c049e70834cf33790a28643ab058b507b35cBen Cheng truncated names first. */ 85625b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t namelen = strlen (secname); 85725b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (namelen >= MODULE_SECT_NAME_LEN) 85825b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 85925b3c049e70834cf33790a28643ab058b507b35cBen Cheng int len = asprintf (&sysfile, SECADDRDIRFMT "%s", 86025b3c049e70834cf33790a28643ab058b507b35cBen Cheng modname, secname); 86125b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (len < 0) 86225b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_ABORT; 86325b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *end = sysfile + len; 86425b3c049e70834cf33790a28643ab058b507b35cBen Cheng do 86525b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 86625b3c049e70834cf33790a28643ab058b507b35cBen Cheng *--end = '\0'; 86725b3c049e70834cf33790a28643ab058b507b35cBen Cheng f = fopen (sysfile, "r"); 86825b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (is_init && f == NULL && errno == ENOENT) 86925b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 87025b3c049e70834cf33790a28643ab058b507b35cBen Cheng sysfile[len - namelen] = '_'; 87125b3c049e70834cf33790a28643ab058b507b35cBen Cheng f = fopen (sysfile, "r"); 87225b3c049e70834cf33790a28643ab058b507b35cBen Cheng sysfile[len - namelen] = '.'; 87325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 87425b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 87525b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (f == NULL && errno == ENOENT 87625b3c049e70834cf33790a28643ab058b507b35cBen Cheng && end - &sysfile[len - namelen] >= MODULE_SECT_NAME_LEN); 87725b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (sysfile); 87825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 87925b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f != NULL) 88025b3c049e70834cf33790a28643ab058b507b35cBen Cheng goto ok; 88125b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 88225b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 88325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 88425b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_ABORT; 88525b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 88625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 88725b3c049e70834cf33790a28643ab058b507b35cBen Cheng ok: 88825b3c049e70834cf33790a28643ab058b507b35cBen Cheng (void) __fsetlocking (f, FSETLOCKING_BYCALLER); 88925b3c049e70834cf33790a28643ab058b507b35cBen Cheng 89025b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = (fscanf (f, "%" PRIx64 "\n", addr) == 1 ? 0 89125b3c049e70834cf33790a28643ab058b507b35cBen Cheng : ferror_unlocked (f) ? errno : ENOEXEC); 89225b3c049e70834cf33790a28643ab058b507b35cBen Cheng fclose (f); 89325b3c049e70834cf33790a28643ab058b507b35cBen Cheng 89425b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == 0) 89525b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_OK; 89625b3c049e70834cf33790a28643ab058b507b35cBen Cheng 89725b3c049e70834cf33790a28643ab058b507b35cBen Cheng errno = result; 89825b3c049e70834cf33790a28643ab058b507b35cBen Cheng return DWARF_CB_ABORT; 89925b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 90025b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_linux_kernel_module_section_address) 90125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 90225b3c049e70834cf33790a28643ab058b507b35cBen Chengint 90325b3c049e70834cf33790a28643ab058b507b35cBen Chengdwfl_linux_kernel_report_modules (Dwfl *dwfl) 90425b3c049e70834cf33790a28643ab058b507b35cBen Cheng{ 90525b3c049e70834cf33790a28643ab058b507b35cBen Cheng FILE *f = fopen (MODULELIST, "r"); 90625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (f == NULL) 90725b3c049e70834cf33790a28643ab058b507b35cBen Cheng return errno; 90825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 90925b3c049e70834cf33790a28643ab058b507b35cBen Cheng (void) __fsetlocking (f, FSETLOCKING_BYCALLER); 91025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 91125b3c049e70834cf33790a28643ab058b507b35cBen Cheng int result = 0; 91225b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwarf_Addr modaddr; 91325b3c049e70834cf33790a28643ab058b507b35cBen Cheng unsigned long int modsz; 91425b3c049e70834cf33790a28643ab058b507b35cBen Cheng char modname[128]; 91525b3c049e70834cf33790a28643ab058b507b35cBen Cheng char *line = NULL; 91625b3c049e70834cf33790a28643ab058b507b35cBen Cheng size_t linesz = 0; 91725b3c049e70834cf33790a28643ab058b507b35cBen Cheng /* We can't just use fscanf here because it's not easy to distinguish \n 91825b3c049e70834cf33790a28643ab058b507b35cBen Cheng from other whitespace so as to take the optional word following the 91925b3c049e70834cf33790a28643ab058b507b35cBen Cheng address but always stop at the end of the line. */ 92025b3c049e70834cf33790a28643ab058b507b35cBen Cheng while (getline (&line, &linesz, f) > 0 92125b3c049e70834cf33790a28643ab058b507b35cBen Cheng && sscanf (line, "%128s %lu %*s %*s %*s %" PRIx64 " %*s\n", 92225b3c049e70834cf33790a28643ab058b507b35cBen Cheng modname, &modsz, &modaddr) == 3) 92325b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 92425b3c049e70834cf33790a28643ab058b507b35cBen Cheng Dwfl_Module *mod = INTUSE(dwfl_report_module) (dwfl, modname, 92525b3c049e70834cf33790a28643ab058b507b35cBen Cheng modaddr, modaddr + modsz); 92625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (mod == NULL) 92725b3c049e70834cf33790a28643ab058b507b35cBen Cheng { 92825b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = -1; 92925b3c049e70834cf33790a28643ab058b507b35cBen Cheng break; 93025b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 93125b3c049e70834cf33790a28643ab058b507b35cBen Cheng 93225b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = check_module_notes (mod); 93325b3c049e70834cf33790a28643ab058b507b35cBen Cheng } 93425b3c049e70834cf33790a28643ab058b507b35cBen Cheng free (line); 93525b3c049e70834cf33790a28643ab058b507b35cBen Cheng 93625b3c049e70834cf33790a28643ab058b507b35cBen Cheng if (result == 0) 93725b3c049e70834cf33790a28643ab058b507b35cBen Cheng result = ferror_unlocked (f) ? errno : feof_unlocked (f) ? 0 : ENOEXEC; 93825b3c049e70834cf33790a28643ab058b507b35cBen Cheng 93925b3c049e70834cf33790a28643ab058b507b35cBen Cheng fclose (f); 94025b3c049e70834cf33790a28643ab058b507b35cBen Cheng 94125b3c049e70834cf33790a28643ab058b507b35cBen Cheng return result; 94225b3c049e70834cf33790a28643ab058b507b35cBen Cheng} 94325b3c049e70834cf33790a28643ab058b507b35cBen ChengINTDEF (dwfl_linux_kernel_report_modules) 944