1441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* ELF string table handling. 2cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Copyright (C) 2000, 2001, 2002, 2005 Red Hat, Inc. 3cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng This file is part of Red Hat elfutils. 4441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Written by Ulrich Drepper <drepper@redhat.com>, 2000. 5441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 6cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is free software; you can redistribute it and/or modify 7cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng it under the terms of the GNU General Public License as published by the 8cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Free Software Foundation; version 2 of the License. 9cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 10cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is distributed in the hope that it will be useful, but 11cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng WITHOUT ANY WARRANTY; without even the implied warranty of 12cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 13cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng General Public License for more details. 14cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 15cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng You should have received a copy of the GNU General Public License along 16cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng with Red Hat elfutils; if not, write to the Free Software Foundation, 17cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. 18cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 19cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng In addition, as a special exception, Red Hat, Inc. gives You the 20cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng additional right to link the code of Red Hat elfutils with code licensed 21cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng under any Open Source Initiative certified open source license 22cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng (http://www.opensource.org/licenses/index.php) which requires the 23cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng distribution of source code with any binary distribution and to 24cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng distribute linked combinations of the two. Non-GPL Code permitted under 25cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng this exception must only link to the code of Red Hat elfutils through 26cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng those well defined interfaces identified in the file named EXCEPTION 27cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng found in the source code files (the "Approved Interfaces"). The files 28cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng of Non-GPL Code may instantiate templates or use macros or inline 29cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng functions from the Approved Interfaces without causing the resulting 30cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng work to be covered by the GNU General Public License. Only Red Hat, 31cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Inc. may make changes or additions to the list of Approved Interfaces. 32cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat's grant of this exception is conditioned upon your not adding 33cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng any new exceptions. If you wish to add a new Approved Interface or 34cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng exception, please contact Red Hat. You must obey the GNU General Public 35cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng License in all respects for all of the Red Hat elfutils code and other 36cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng code used in conjunction with Red Hat elfutils except the Non-GPL Code 37cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng covered by this exception. If you modify this file, you may extend this 38cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng exception to your version of the file, but you are not obligated to do 39cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng so. If you do not wish to provide this exception without modification, 40cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng you must delete this exception statement from your version and license 41cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng this file solely under the GPL without exception. 42cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 43cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Red Hat elfutils is an included package of the Open Invention Network. 44cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng An included package of the Open Invention Network is a package for which 45cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Open Invention Network licensees cross-license their patents. No patent 46cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng license is granted, either expressly or impliedly, by designation as an 47cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng included package. Should you wish to participate in the Open Invention 48cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng Network licensing program, please visit www.openinventionnetwork.com 49cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng <http://www.openinventionnetwork.com>. */ 50441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 51441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifdef HAVE_CONFIG_H 52441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# include <config.h> 53441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 54441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 55441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <assert.h> 56441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <inttypes.h> 57441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <libelf.h> 58441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <stddef.h> 59441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <stdlib.h> 60441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <string.h> 61441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <unistd.h> 62441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <sys/param.h> 63441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 64441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include "libebl.h" 65441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <system.h> 66441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 67441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifndef MIN 68441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# define MIN(a, b) ((a) < (b) ? (a) : (b)) 69441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 70441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 71441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 72441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_Strent 73441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 74441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project const char *string; 75441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t len; 76441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_Strent *next; 77441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_Strent *left; 78441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_Strent *right; 79441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t offset; 80441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char reverse[0]; 81441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 82441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 83441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 84441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct memoryblock 85441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 86441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *next; 87441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char memory[0]; 88441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 89441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 90441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 91441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_Strtab 92441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 93441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_Strent *root; 94441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *memory; 95441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char *backp; 96441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t left; 97441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t total; 98441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project bool nullstr; 99441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 100441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_Strent null; 101441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 102441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 103441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 104441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Cache for the pagesize. We correct this value a bit so that `malloc' 105441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project is not allocating more than a page. */ 106441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic size_t ps; 107441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 108441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 109441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_Strtab * 110441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_strtabinit (bool nullstr) 111441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 112441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (ps == 0) 113441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 114441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ps = sysconf (_SC_PAGESIZE) - 2 * sizeof (void *); 115441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (sizeof (struct memoryblock) < ps); 116441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 117441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 118cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng struct Ebl_Strtab *ret 119cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng = (struct Ebl_Strtab *) calloc (1, sizeof (struct Ebl_Strtab)); 120441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (ret != NULL) 121441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 122441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->nullstr = nullstr; 123441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 124441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nullstr) 125441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 126441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->null.len = 1; 127441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->null.string = ""; 128441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 129441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 130441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 131441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return ret; 132441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 133441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 134441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 135441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic int 136441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectmorememory (struct Ebl_Strtab *st, size_t len) 137441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 138441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len < ps) 139441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project len = ps; 140cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng 141cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng struct memoryblock *newmem = (struct memoryblock *) malloc (len); 142441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (newmem == NULL) 143441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return 1; 144441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 145441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newmem->next = st->memory; 146441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->memory = newmem; 147441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = newmem->memory; 148441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left = len - offsetof (struct memoryblock, memory); 149441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 150441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return 0; 151441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 152441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 153441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 154441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectvoid 155441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_strtabfree (struct Ebl_Strtab *st) 156441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 157441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *mb = st->memory; 158441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 159441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project while (mb != NULL) 160441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 161441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project void *old = mb; 162441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project mb = mb->next; 163441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (old); 164441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 165441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 166441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (st); 167441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 168441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 169441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 170441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic struct Ebl_Strent * 171441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectnewstring (struct Ebl_Strtab *st, const char *str, size_t len) 172441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 173441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compute the amount of padding needed to make the structure aligned. */ 174cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng size_t align = ((__alignof__ (struct Ebl_Strent) 175cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng - (((uintptr_t) st->backp) 176cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng & (__alignof__ (struct Ebl_Strent) - 1))) 177cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng & (__alignof__ (struct Ebl_Strent) - 1)); 178441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 179441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Make sure there is enough room in the memory block. */ 180441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (st->left < align + sizeof (struct Ebl_Strent) + len) 181441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 182441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (morememory (st, sizeof (struct Ebl_Strent) + len)) 183441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 184441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 185441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project align = 0; 186441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 187441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 188441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Create the reserved string. */ 189cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng struct Ebl_Strent *newstr = (struct Ebl_Strent *) (st->backp + align); 190441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->string = str; 191441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->len = len; 192441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = NULL; 193441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->left = NULL; 194441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->right = NULL; 195441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->offset = 0; 196cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng for (int i = len - 2; i >= 0; --i) 197441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->reverse[i] = str[len - 2 - i]; 198441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->reverse[len - 1] = '\0'; 199441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp += align + sizeof (struct Ebl_Strent) + len; 200441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left -= align + sizeof (struct Ebl_Strent) + len; 201441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 202441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return newstr; 203441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 204441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 205441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 206441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* XXX This function should definitely be rewritten to use a balancing 207441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project tree algorith (AVL, red-black trees). For now a simple, correct 208441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project implementation is enough. */ 209441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic struct Ebl_Strent ** 210441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectsearchstring (struct Ebl_Strent **sep, struct Ebl_Strent *newstr) 211441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 212441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* More strings? */ 213441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (*sep == NULL) 214441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 215441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *sep = newstr; 216441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return sep; 217441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 218441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 219441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compare the strings. */ 220cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng int cmpres = memcmp ((*sep)->reverse, newstr->reverse, 221cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng MIN ((*sep)->len, newstr->len) - 1); 222441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (cmpres == 0) 223441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We found a matching string. */ 224441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return sep; 225441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else if (cmpres > 0) 226441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return searchstring (&(*sep)->left, newstr); 227441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 228441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return searchstring (&(*sep)->right, newstr); 229441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 230441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 231441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 232441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Add new string. The actual string is assumed to be permanent. */ 233441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_Strent * 234441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_strtabadd (struct Ebl_Strtab *st, const char *str, size_t len) 235441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 236441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compute the string length if the caller doesn't know it. */ 237441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len == 0) 238441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project len = strlen (str) + 1; 239441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 240441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Make sure all "" strings get offset 0 but only if the table was 241441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project created with a special null entry in mind. */ 242441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len == 1 && st->null.string != NULL) 243441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return &st->null; 244441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 245441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Allocate memory for the new string and its associated information. */ 246cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng struct Ebl_Strent *newstr = newstring (st, str, len); 247441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (newstr == NULL) 248441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 249441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 250441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Search in the array for the place to insert the string. If there 251441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project is no string with matching prefix and no string with matching 252441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project leading substring, create a new entry. */ 253cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng struct Ebl_Strent **sep = searchstring (&st->root, newstr); 254441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (*sep != newstr) 255441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 256441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* This is not the same entry. This means we have a prefix match. */ 257441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if ((*sep)->len > newstr->len) 258441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 259441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Check whether we already know this string. */ 260cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng for (struct Ebl_Strent *subs = (*sep)->next; subs != NULL; 261cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng subs = subs->next) 262441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (subs->len == newstr->len) 263441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 264441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have an exact match with a substring. Free the memory 265441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project we allocated. */ 266441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += st->backp - (char *) newstr; 267441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = (char *) newstr; 268441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 269441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return subs; 270441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 271441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 272441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have a new substring. This means we don't need the reverse 273441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project string of this entry anymore. */ 274441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp -= newstr->len; 275441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += newstr->len; 276441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 277441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = (*sep)->next; 278441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project (*sep)->next = newstr; 279441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 280441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else if ((*sep)->len != newstr->len) 281441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 282441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* When we get here it means that the string we are about to 283441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project add has a common prefix with a string we already have but 284441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project it is longer. In this case we have to put it first. */ 285441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->total += newstr->len - (*sep)->len; 286441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = *sep; 287441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->left = (*sep)->left; 288441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->right = (*sep)->right; 289441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *sep = newstr; 290441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 291441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 292441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 293441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have an exact match. Free the memory we allocated. */ 294441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += st->backp - (char *) newstr; 295441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = (char *) newstr; 296441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 297441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr = *sep; 298441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 299441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 300441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 301441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->total += newstr->len; 302441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 303441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return newstr; 304441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 305441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 306441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 307441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic void 308441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectcopystrings (struct Ebl_Strent *nodep, char **freep, size_t *offsetp) 309441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 310441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nodep->left != NULL) 311441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (nodep->left, freep, offsetp); 312441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 313441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Process the current node. */ 314441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project nodep->offset = *offsetp; 315441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *freep = (char *) mempcpy (*freep, nodep->string, nodep->len); 316441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *offsetp += nodep->len; 317441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 318cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng for (struct Ebl_Strent *subs = nodep->next; subs != NULL; subs = subs->next) 319441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 320441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (subs->len < nodep->len); 321441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project subs->offset = nodep->offset + nodep->len - subs->len; 322441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (subs->offset != 0 || subs->string[0] == '\0'); 323441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 324441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 325441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nodep->right != NULL) 326441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (nodep->right, freep, offsetp); 327441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 328441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 329441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 330441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectvoid 331441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_strtabfinalize (struct Ebl_Strtab *st, Elf_Data *data) 332441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 333441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t nulllen = st->nullstr ? 1 : 0; 334441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 335441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Fill in the information. */ 336441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_buf = malloc (st->total + nulllen); 337441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (data->d_buf == NULL) 338441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project abort (); 339441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 340441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* The first byte must always be zero if we created the table with a 341441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project null string. */ 342441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (st->nullstr) 343441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *((char *) data->d_buf) = '\0'; 344441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 345441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_type = ELF_T_BYTE; 346441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_size = st->total + nulllen; 347441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_off = 0; 348441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_align = 1; 349441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_version = EV_CURRENT; 350441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 351441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Now run through the tree and add all the string while also updating 352441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project the offset members of the elfstrent records. */ 353cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng char *endp = (char *) data->d_buf + nulllen; 354cc6695e2684ce93cdf8bd2da63d55d2cf49ff076Ben Cheng size_t copylen = nulllen; 355441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (st->root, &endp, ©len); 356441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (copylen == st->total + nulllen); 357441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 358441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 359441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 360441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectsize_t 361441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_strtaboffset (struct Ebl_Strent *se) 362441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 363441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return se->offset; 364441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 365441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 366441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 367441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectconst char * 368441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_string (struct Ebl_Strent *se) 369441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 370441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (se->string != NULL); 371441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 372441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return se->string; 373441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 374