1441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* ELF string table handling. 2441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project Copyright (C) 2000, 2001, 2002 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. 9441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 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 <wchar.h> 63441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <sys/param.h> 64441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 65441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include "libebl.h" 66441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#include <system.h> 67441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 68441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#ifndef MIN 69441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project# define MIN(a, b) ((a) < (b) ? (a) : (b)) 70441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project#endif 71441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 72441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 73441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_WStrent 74441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 75441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project const wchar_t *string; 76441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t len; 77441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *next; 78441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *left; 79441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *right; 80441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t offset; 81441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project wchar_t reverse[0]; 82441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 83441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 84441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 85441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct memoryblock 86441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 87441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *next; 88441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char memory[0]; 89441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 90441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 91441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 92441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_WStrtab 93441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 94441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *root; 95441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *memory; 96441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project char *backp; 97441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t left; 98441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t total; 99441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project bool nullstr; 100441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 101441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent null; 102441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project}; 103441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 104441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 105441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Cache for the pagesize. We correct this value a bit so that `malloc' 106441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project is not allocating more than a page. */ 107441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic size_t ps; 108441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 109441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 110441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_WStrtab * 111441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_wstrtabinit (bool nullstr) 112441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 113441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrtab *ret; 114441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 115441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (ps == 0) 116441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 117441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ps = sysconf (_SC_PAGESIZE) - 2 * sizeof (void *); 118441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (sizeof (struct memoryblock) < ps); 119441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 120441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 121441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret = (struct Ebl_WStrtab *) calloc (1, sizeof (struct Ebl_WStrtab)); 122441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (ret != NULL) 123441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 124441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->nullstr = nullstr; 125441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nullstr) 126441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 127441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->null.len = 1; 128441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project ret->null.string = L""; 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_WStrtab *st, size_t len) 137441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 138441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *newmem; 139441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 140441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len < ps) 141441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project len = ps; 142441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newmem = (struct memoryblock *) malloc (len); 143441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (newmem == NULL) 144441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return 1; 145441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 146441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newmem->next = st->memory; 147441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->memory = newmem; 148441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = newmem->memory; 149441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left = len - offsetof (struct memoryblock, memory); 150441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 151441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return 0; 152441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 153441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 154441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 155441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectvoid 156441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_wstrtabfree (struct Ebl_WStrtab *st) 157441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 158441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct memoryblock *mb = st->memory; 159441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 160441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project while (mb != NULL) 161441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 162441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project void *old = mb; 163441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project mb = mb->next; 164441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (old); 165441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 166441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 167441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project free (st); 168441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 169441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 170441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 171441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic struct Ebl_WStrent * 172441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectnewstring (struct Ebl_WStrtab *st, const wchar_t *str, size_t len) 173441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 174441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *newstr; 175441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t align; 176441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project int i; 177441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 178441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compute the amount of padding needed to make the structure aligned. */ 179441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project align = ((__alignof__ (struct Ebl_WStrent) 180441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project - (((uintptr_t) st->backp) 181441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project & (__alignof__ (struct Ebl_WStrent) - 1))) 182441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project & (__alignof__ (struct Ebl_WStrent) - 1)); 183441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 184441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Make sure there is enough room in the memory block. */ 185441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (st->left < align + sizeof (struct Ebl_WStrent) + len * sizeof (wchar_t)) 186441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 187441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (morememory (st, 188441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project sizeof (struct Ebl_WStrent) + len * sizeof (wchar_t))) 189441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 190441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 191441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project align = 0; 192441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 193441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 194441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Create the reserved string. */ 195441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr = (struct Ebl_WStrent *) (st->backp + align); 196441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->string = str; 197441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->len = len; 198441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = NULL; 199441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->left = NULL; 200441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->right = NULL; 201441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->offset = 0; 202441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project for (i = len - 2; i >= 0; --i) 203441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->reverse[i] = str[len - 2 - i]; 204441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->reverse[len - 1] = L'\0'; 205441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp += align + sizeof (struct Ebl_WStrent) + len * sizeof (wchar_t); 206441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left -= align + sizeof (struct Ebl_WStrent) + len * sizeof (wchar_t); 207441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 208441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return newstr; 209441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 210441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 211441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 212441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* XXX This function should definitely be rewritten to use a balancing 213441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project tree algorith (AVL, red-black trees). For now a simple, correct 214441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project implementation is enough. */ 215441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic struct Ebl_WStrent ** 216441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectsearchstring (struct Ebl_WStrent **sep, struct Ebl_WStrent *newstr) 217441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 218441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project int cmpres; 219441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 220441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* More strings? */ 221441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (*sep == NULL) 222441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 223441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *sep = newstr; 224441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return sep; 225441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 226441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 227441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compare the strings. */ 228441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project cmpres = wmemcmp ((*sep)->reverse, newstr->reverse, 229441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project MIN ((*sep)->len, newstr->len) - 1); 230441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (cmpres == 0) 231441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We found a matching string. */ 232441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return sep; 233441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else if (cmpres > 0) 234441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return searchstring (&(*sep)->left, newstr); 235441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 236441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return searchstring (&(*sep)->right, newstr); 237441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 238441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 239441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 240441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project/* Add new string. The actual string is assumed to be permanent. */ 241441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstruct Ebl_WStrent * 242441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_wstrtabadd (struct Ebl_WStrtab *st, const wchar_t *str, size_t len) 243441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 244441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *newstr; 245441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent **sep; 246441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 247441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Compute the string length if the caller doesn't know it. */ 248441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len == 0) 249441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project len = wcslen (str) + 1; 250441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 251441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Make sure all "" strings get offset 0 but only if the table was 252441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project created with a special null entry in mind. */ 253441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (len == 1 && st->null.string != NULL) 254441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return &st->null; 255441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 256441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Allocate memory for the new string and its associated information. */ 257441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr = newstring (st, str, len); 258441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (newstr == NULL) 259441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return NULL; 260441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 261441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Search in the array for the place to insert the string. If there 262441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project is no string with matching prefix and no string with matching 263441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project leading substring, create a new entry. */ 264441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project sep = searchstring (&st->root, newstr); 265441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (*sep != newstr) 266441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 267441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* This is not the same entry. This means we have a prefix match. */ 268441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if ((*sep)->len > newstr->len) 269441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 270441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *subs; 271441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 272441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Check whether we already know this string. */ 273441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project for (subs = (*sep)->next; subs != NULL; subs = subs->next) 274441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (subs->len == newstr->len) 275441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 276441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have an exact match with a substring. Free the memory 277441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project we allocated. */ 278441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += st->backp - (char *) newstr; 279441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = (char *) newstr; 280441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 281441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return subs; 282441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 283441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 284441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have a new substring. This means we don't need the reverse 285441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project string of this entry anymore. */ 286441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp -= newstr->len; 287441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += newstr->len; 288441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 289441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = (*sep)->next; 290441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project (*sep)->next = newstr; 291441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 292441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else if ((*sep)->len != newstr->len) 293441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 294441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* When we get here it means that the string we are about to 295441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project add has a common prefix with a string we already have but 296441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project it is longer. In this case we have to put it first. */ 297441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->total += newstr->len - (*sep)->len; 298441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->next = *sep; 299441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->left = (*sep)->left; 300441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr->right = (*sep)->right; 301441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *sep = newstr; 302441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 303441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 304441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 305441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* We have an exact match. Free the memory we allocated. */ 306441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->left += st->backp - (char *) newstr; 307441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->backp = (char *) newstr; 308441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 309441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project newstr = *sep; 310441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 311441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 312441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project else 313441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project st->total += newstr->len; 314441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 315441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return newstr; 316441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 317441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 318441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 319441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectstatic void 320441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectcopystrings (struct Ebl_WStrent *nodep, wchar_t **freep, size_t *offsetp) 321441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 322441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project struct Ebl_WStrent *subs; 323441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 324441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nodep->left != NULL) 325441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (nodep->left, freep, offsetp); 326441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 327441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Process the current node. */ 328441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project nodep->offset = *offsetp; 329441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *freep = wmempcpy (*freep, nodep->string, nodep->len); 330441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *offsetp += nodep->len * sizeof (wchar_t); 331441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 332441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project for (subs = nodep->next; subs != NULL; subs = subs->next) 333441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project { 334441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (subs->len < nodep->len); 335441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project subs->offset = nodep->offset + nodep->len - subs->len; 336441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (subs->offset != 0 || subs->string[0] == '\0'); 337441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project } 338441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 339441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (nodep->right != NULL) 340441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (nodep->right, freep, offsetp); 341441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 342441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 343441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 344441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectvoid 345441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_wstrtabfinalize (struct Ebl_WStrtab *st, Elf_Data *data) 346441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 347441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t copylen; 348441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project wchar_t *endp; 349441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project size_t nulllen = st->nullstr ? 1 : 0; 350441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 351441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Fill in the information. */ 352441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_buf = malloc ((st->total + nulllen) * sizeof (wchar_t)); 353441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (data->d_buf == NULL) 354441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project abort (); 355441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 356441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* The first byte must always be zero if we created the table with a 357441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project null string. */ 358441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project if (st->nullstr) 359441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project *((wchar_t *) data->d_buf) = L'\0'; 360441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 361441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_type = ELF_T_BYTE; 362441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_size = st->total + nulllen; 363441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_off = 0; 364441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_align = 1; 365441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project data->d_version = EV_CURRENT; 366441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 367441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project /* Now run through the tree and add all the string while also updating 368441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project the offset members of the elfstrent records. */ 369441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project endp = (wchar_t *) data->d_buf + nulllen; 370441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copylen = sizeof (wchar_t) * nulllen; 371441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project copystrings (st->root, &endp, ©len); 372441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project assert (copylen == (st->total + nulllen) * sizeof (wchar_t)); 373441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 374441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 375441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project 376441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectsize_t 377441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Projectebl_wstrtaboffset (struct Ebl_WStrent *se) 378441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project{ 379441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project return se->offset; 380441f72d43a9b550baa779fc82f70816da5f74f0eThe Android Open Source Project} 381