core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/elf/ElfHelper.java - cdt/org.eclipse.cdt - Git at Google

 package org.eclipse.cdt.utils.elf;

 /*
  * (c) Copyright QNX Software Systems Ltd. 2002.
  * All Rights Reserved.
  */

 import java.io.File;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.Vector;

 /**
  *  <code>ElfHelper</code> is a wrapper class for the <code>Elf</code> class
  *  to provide higher level API for sorting/searching the ELF data.
  *
  *  @see Elf
  */
 public class ElfHelper {

 	private Elf elf;
 	private Elf.ELFhdr hdr;
 	private Elf.Attribute attrib;
 	private Elf.Symbol[] dynsyms;
 	private Elf.Symbol[] symbols;
 	private Elf.Section[] sections;
 	private Elf.Dynamic[] dynamics;

 	public void dispose() {
 		if (elf != null) {
 			elf.dispose();
 			elf = null;
 		}
 	}

 	public class Sizes {
 		public long text;
 		public long data;
 		public long bss;
 		public long total;
 		public Sizes(long t, long d, long b) {
 			text = t;
 			data = d;
 			bss = b;
 			total = text + data + bss;
 		}
 	}

 	private void loadSymbols() throws IOException {
 		if (symbols == null) {
 			elf.loadSymbols();
 			symbols = elf.getSymtabSymbols();
 			dynsyms = elf.getDynamicSymbols();

 			if (symbols.length <= 0)
 				symbols = dynsyms;
 			if (dynsyms.length <= 0)
 				dynsyms = symbols;
 		}
 	}

 	private void loadSections() throws IOException {
 		if (sections == null)
 			sections = elf.getSections();
 	}

 	private void loadDynamics() throws IOException {
 		if (dynamics == null) {
 			dynamics = new Elf.Dynamic[0];
 			Elf.Section dynSect = elf.getSectionByName(".dynamic");
 			if (dynSect != null) {
 				dynamics = elf.getDynamicSections(dynSect);
 			}

 		}
 	}

 	/** Common code used by all constructors */
 	private void commonSetup() throws IOException {
 		hdr = elf.getELFhdr();
 		attrib = elf.getAttributes();
 	}

 	/**
 	 * Create a new <code>ElfHelper</code> using an existing <code>Elf</code>
 	 * object.
 	 * @param elf An existing Elf object to wrap.
 	 * @throws IOException Error processing the Elf file.
 	 */
 	public ElfHelper(Elf elf) throws IOException {
 		this.elf = elf;
 		commonSetup();
 	}

 	/**
 	 * Create a new <code>ElfHelper</code> based on the given filename.
 	 *
 	 * @param filename The file to use for creating a new Elf object.
 	 * @throws IOException Error processing the Elf file.
 	 * @see Elf#Elf( String )
 	 */
 	public ElfHelper(String filename) throws IOException {
 		elf = new Elf(filename);
 		commonSetup();
 	}

 	public ElfHelper(String filename, boolean filton) throws IOException {
 		elf = new Elf(filename, filton);
 		commonSetup();
 	}

 	/** Give back the Elf object that this helper is wrapping */
 	public Elf getElf() {
 		return elf;
 	}

 	public Elf.Symbol[] getExternalFunctions() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();
 		loadSections();

 		for (int i = 0; i < dynsyms.length; i++) {
 			if (dynsyms[i].st_bind() == Elf.Symbol.STB_GLOBAL && dynsyms[i].st_type() == Elf.Symbol.STT_FUNC) {
 				int idx = dynsyms[i].st_shndx;
 				if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
 					String name = dynsyms[i].toString();
 					if (name != null && name.trim().length() > 0)
 						v.add(dynsyms[i]);
 				} else if (idx >= 0 && sections[idx].sh_type == Elf.Section.SHT_NULL) {
 					v.add(dynsyms[i]);
 				}
 			}
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Symbol[] getExternalObjects() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();
 		loadSections();

 		for (int i = 0; i < dynsyms.length; i++) {
 			if (dynsyms[i].st_bind() == Elf.Symbol.STB_GLOBAL && dynsyms[i].st_type() == Elf.Symbol.STT_OBJECT) {
 				int idx = dynsyms[i].st_shndx;
 				if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
 					String name = dynsyms[i].toString();
 					if (name != null && name.trim().length() > 0)
 						v.add(dynsyms[i]);
 				} else if (idx >= 0 && sections[idx].sh_type == Elf.Section.SHT_NULL) {
 					v.add(dynsyms[i]);
 				}
 			}
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Symbol[] getUndefined() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();

 		for (int i = 0; i < dynsyms.length; i++) {
 			if (dynsyms[i].st_shndx == Elf.Symbol.SHN_UNDEF)
 				v.add(dynsyms[i]);
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Symbol[] getLocalFunctions() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();
 		loadSections();

 		for (int i = 0; i < symbols.length; i++) {
 			if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_FUNC) {
 				int idx = symbols[i].st_shndx;
 				if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
 					String name = symbols[i].toString();
 					if (name != null && name.trim().length() > 0)
 						v.add(symbols[i]);
 				} else if (idx >= 0 && sections[idx].sh_type != Elf.Section.SHT_NULL) {
 					v.add(symbols[i]);
 				}
 			}
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Symbol[] getLocalObjects() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();
 		loadSections();

 		for (int i = 0; i < symbols.length; i++) {
 			if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_OBJECT) {
 				int idx = symbols[i].st_shndx;
 				if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
 					String name = symbols[i].toString();
 					if (name != null && name.trim().length() > 0)
 						v.add(symbols[i]);
 				} else if (idx >= 0 && sections[idx].sh_type != Elf.Section.SHT_NULL) {
 					v.add(symbols[i]);
 				}
 			}
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Symbol[] getCommonObjects() throws IOException {
 		Vector v = new Vector();

 		loadSymbols();
 		loadSections();

 		for (int i = 0; i < symbols.length; i++) {
 			if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_OBJECT) {
 				int idx = symbols[i].st_shndx;
 				if (idx == Elf.Symbol.SHN_COMMON) {
 					v.add(symbols[i]);
 				}
 			}
 		}

 		Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
 		Arrays.sort(ret, new SymbolSortCompare());
 		return ret;
 	}

 	public Elf.Dynamic[] getNeeded() throws IOException {
 		Vector v = new Vector();

 		loadDynamics();

 		for (int i = 0; i < dynamics.length; i++) {
 			if (dynamics[i].d_tag == Elf.Dynamic.DT_NEEDED)
 				v.add(dynamics[i]);
 		}
 		return (Elf.Dynamic[]) v.toArray(new Elf.Dynamic[0]);
 	}

 	public String getSoname() throws IOException {
 		String soname = "";

 		loadDynamics();

 		for (int i = 0; i < dynamics.length; i++) {
 			if (dynamics[i].d_tag == Elf.Dynamic.DT_SONAME)
 				soname = dynamics[i].toString();
 		}
 		return soname;
 	}

 	private String getSubUsage(String full, String name) {
 		int start, end;
 		//boolean has_names = false;
 		//boolean has_languages = false;
 		start = 0;
 		end = 0;

 		for (int i = 0; i < full.length(); i++) {
 			if (full.charAt(i) == '%') {
 				if (full.charAt(i + 1) == '-') {
 					if (start == 0) {
 						int eol = full.indexOf('\n', i + 2);
 						String temp = full.substring(i + 2, eol);
 						if (temp.compareTo(name) == 0)
 							start = eol;

 						//has_names = true;
 					} else if (end == 0) {
 						end = i - 1;
 					}
 				}

 				//if( full.charAt( i+1 ) == '=' )
 				//has_languages = true;
 			}
 		}

 		if (end == 0)
 			end = full.length();

 		if (start == 0)
 			return full;

 		return full.substring(start, end);
 	}

 	public String getQnxUsage() throws IOException {

 		loadSections();

 		for (int i = 0; i < sections.length; i++) {
 			if (sections[i].toString().compareTo("QNX_usage") == 0) {
 				File file = new File(elf.getFilename());

 				String full_usage = new String(sections[i].loadSectionData());
 				String usage = getSubUsage(full_usage, file.getName());
 				StringBuffer buffer = new StringBuffer(usage);

 				for (int j = 0; j < buffer.length(); j++) {
 					if (buffer.charAt(j) == '%') {
 						if (buffer.charAt(j + 1) == 'C')
 							buffer.replace(j, j + 2, file.getName());
 					}
 				}

 				return buffer.toString();
 			}
 		}
 		return new String("");
 	}

 	public Sizes getSizes() throws IOException {
 		long text, data, bss;

 		text = 0;
 		data = 0;
 		bss = 0;

 		loadSections();

 		for (int i = 0; i < sections.length; i++) {
 			if (sections[i].sh_type != Elf.Section.SHT_NOBITS) {
 				if (sections[i].sh_flags == (Elf.Section.SHF_WRITE | Elf.Section.SHF_ALLOC)) {
 					data += sections[i].sh_size;
 				} else if ((sections[i].sh_flags & Elf.Section.SHF_ALLOC) != 0) {
 					text += sections[i].sh_size;
 				}
 			} else {
 				if (sections[i].sh_flags == (Elf.Section.SHF_WRITE | Elf.Section.SHF_ALLOC)) {
 					bss += sections[i].sh_size;
 				}
 			}
 		}

 		return new Sizes(text, data, bss);
 	}

 }
	package org.eclipse.cdt.utils.elf;

	/*
	* (c) Copyright QNX Software Systems Ltd. 2002.
	* All Rights Reserved.
	*/

	import java.io.File;
	import java.io.IOException;
	import java.util.Arrays;
	import java.util.Vector;

	/**
	* <code>ElfHelper</code> is a wrapper class for the <code>Elf</code> class
	* to provide higher level API for sorting/searching the ELF data.
	*
	* @see Elf
	*/
	public class ElfHelper {

	private Elf elf;
	private Elf.ELFhdr hdr;
	private Elf.Attribute attrib;
	private Elf.Symbol[] dynsyms;
	private Elf.Symbol[] symbols;
	private Elf.Section[] sections;
	private Elf.Dynamic[] dynamics;

	public void dispose() {
	if (elf != null) {
	elf.dispose();
	elf = null;
	}
	}

	public class Sizes {
	public long text;
	public long data;
	public long bss;
	public long total;
	public Sizes(long t, long d, long b) {
	text = t;
	data = d;
	bss = b;
	total = text + data + bss;
	}
	}

	private void loadSymbols() throws IOException {
	if (symbols == null) {
	elf.loadSymbols();
	symbols = elf.getSymtabSymbols();
	dynsyms = elf.getDynamicSymbols();

	if (symbols.length <= 0)
	symbols = dynsyms;
	if (dynsyms.length <= 0)
	dynsyms = symbols;
	}
	}

	private void loadSections() throws IOException {
	if (sections == null)
	sections = elf.getSections();
	}

	private void loadDynamics() throws IOException {
	if (dynamics == null) {
	dynamics = new Elf.Dynamic[0];
	Elf.Section dynSect = elf.getSectionByName(".dynamic");
	if (dynSect != null) {
	dynamics = elf.getDynamicSections(dynSect);
	}

	}
	}

	/** Common code used by all constructors */
	private void commonSetup() throws IOException {
	hdr = elf.getELFhdr();
	attrib = elf.getAttributes();
	}

	/**
	* Create a new <code>ElfHelper</code> using an existing <code>Elf</code>
	* object.
	* @param elf An existing Elf object to wrap.
	* @throws IOException Error processing the Elf file.
	*/
	public ElfHelper(Elf elf) throws IOException {
	this.elf = elf;
	commonSetup();
	}

	/**
	* Create a new <code>ElfHelper</code> based on the given filename.
	*
	* @param filename The file to use for creating a new Elf object.
	* @throws IOException Error processing the Elf file.
	* @see Elf#Elf( String )
	*/
	public ElfHelper(String filename) throws IOException {
	elf = new Elf(filename);
	commonSetup();
	}

	public ElfHelper(String filename, boolean filton) throws IOException {
	elf = new Elf(filename, filton);
	commonSetup();
	}

	/** Give back the Elf object that this helper is wrapping */
	public Elf getElf() {
	return elf;
	}

	public Elf.Symbol[] getExternalFunctions() throws IOException {
	Vector v = new Vector();

	loadSymbols();
	loadSections();

	for (int i = 0; i < dynsyms.length; i++) {
	if (dynsyms[i].st_bind() == Elf.Symbol.STB_GLOBAL && dynsyms[i].st_type() == Elf.Symbol.STT_FUNC) {
	int idx = dynsyms[i].st_shndx;
	if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
	String name = dynsyms[i].toString();
	if (name != null && name.trim().length() > 0)
	v.add(dynsyms[i]);
	} else if (idx >= 0 && sections[idx].sh_type == Elf.Section.SHT_NULL) {
	v.add(dynsyms[i]);
	}
	}
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Symbol[] getExternalObjects() throws IOException {
	Vector v = new Vector();

	loadSymbols();
	loadSections();

	for (int i = 0; i < dynsyms.length; i++) {
	if (dynsyms[i].st_bind() == Elf.Symbol.STB_GLOBAL && dynsyms[i].st_type() == Elf.Symbol.STT_OBJECT) {
	int idx = dynsyms[i].st_shndx;
	if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
	String name = dynsyms[i].toString();
	if (name != null && name.trim().length() > 0)
	v.add(dynsyms[i]);
	} else if (idx >= 0 && sections[idx].sh_type == Elf.Section.SHT_NULL) {
	v.add(dynsyms[i]);
	}
	}
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Symbol[] getUndefined() throws IOException {
	Vector v = new Vector();

	loadSymbols();

	for (int i = 0; i < dynsyms.length; i++) {
	if (dynsyms[i].st_shndx == Elf.Symbol.SHN_UNDEF)
	v.add(dynsyms[i]);
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Symbol[] getLocalFunctions() throws IOException {
	Vector v = new Vector();

	loadSymbols();
	loadSections();

	for (int i = 0; i < symbols.length; i++) {
	if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_FUNC) {
	int idx = symbols[i].st_shndx;
	if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
	String name = symbols[i].toString();
	if (name != null && name.trim().length() > 0)
	v.add(symbols[i]);
	} else if (idx >= 0 && sections[idx].sh_type != Elf.Section.SHT_NULL) {
	v.add(symbols[i]);
	}
	}
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Symbol[] getLocalObjects() throws IOException {
	Vector v = new Vector();

	loadSymbols();
	loadSections();

	for (int i = 0; i < symbols.length; i++) {
	if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_OBJECT) {
	int idx = symbols[i].st_shndx;
	if (idx < Elf.Symbol.SHN_HIPROC && idx > Elf.Symbol.SHN_LOPROC) {
	String name = symbols[i].toString();
	if (name != null && name.trim().length() > 0)
	v.add(symbols[i]);
	} else if (idx >= 0 && sections[idx].sh_type != Elf.Section.SHT_NULL) {
	v.add(symbols[i]);
	}
	}
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Symbol[] getCommonObjects() throws IOException {
	Vector v = new Vector();

	loadSymbols();
	loadSections();

	for (int i = 0; i < symbols.length; i++) {
	if (symbols[i].st_bind() == Elf.Symbol.STB_GLOBAL && symbols[i].st_type() == Elf.Symbol.STT_OBJECT) {
	int idx = symbols[i].st_shndx;
	if (idx == Elf.Symbol.SHN_COMMON) {
	v.add(symbols[i]);
	}
	}
	}

	Elf.Symbol[] ret = (Elf.Symbol[]) v.toArray(new Elf.Symbol[0]);
	Arrays.sort(ret, new SymbolSortCompare());
	return ret;
	}

	public Elf.Dynamic[] getNeeded() throws IOException {
	Vector v = new Vector();

	loadDynamics();

	for (int i = 0; i < dynamics.length; i++) {
	if (dynamics[i].d_tag == Elf.Dynamic.DT_NEEDED)
	v.add(dynamics[i]);
	}
	return (Elf.Dynamic[]) v.toArray(new Elf.Dynamic[0]);
	}

	public String getSoname() throws IOException {
	String soname = "";

	loadDynamics();

	for (int i = 0; i < dynamics.length; i++) {
	if (dynamics[i].d_tag == Elf.Dynamic.DT_SONAME)
	soname = dynamics[i].toString();
	}
	return soname;
	}

	private String getSubUsage(String full, String name) {
	int start, end;
	//boolean has_names = false;
	//boolean has_languages = false;
	start = 0;
	end = 0;

	for (int i = 0; i < full.length(); i++) {
	if (full.charAt(i) == '%') {
	if (full.charAt(i + 1) == '-') {
	if (start == 0) {
	int eol = full.indexOf('\n', i + 2);
	String temp = full.substring(i + 2, eol);
	if (temp.compareTo(name) == 0)
	start = eol;

	//has_names = true;
	} else if (end == 0) {
	end = i - 1;
	}
	}

	//if( full.charAt( i+1 ) == '=' )
	//has_languages = true;
	}
	}

	if (end == 0)
	end = full.length();

	if (start == 0)
	return full;

	return full.substring(start, end);
	}

	public String getQnxUsage() throws IOException {

	loadSections();

	for (int i = 0; i < sections.length; i++) {
	if (sections[i].toString().compareTo("QNX_usage") == 0) {
	File file = new File(elf.getFilename());

	String full_usage = new String(sections[i].loadSectionData());
	String usage = getSubUsage(full_usage, file.getName());
	StringBuffer buffer = new StringBuffer(usage);

	for (int j = 0; j < buffer.length(); j++) {
	if (buffer.charAt(j) == '%') {
	if (buffer.charAt(j + 1) == 'C')
	buffer.replace(j, j + 2, file.getName());
	}
	}

	return buffer.toString();
	}
	}
	return new String("");
	}

	public Sizes getSizes() throws IOException {
	long text, data, bss;

	text = 0;
	data = 0;
	bss = 0;

	loadSections();

	for (int i = 0; i < sections.length; i++) {
	if (sections[i].sh_type != Elf.Section.SHT_NOBITS) {
	if (sections[i].sh_flags == (Elf.Section.SHF_WRITE \| Elf.Section.SHF_ALLOC)) {
	data += sections[i].sh_size;
	} else if ((sections[i].sh_flags & Elf.Section.SHF_ALLOC) != 0) {
	text += sections[i].sh_size;
	}
	} else {
	if (sections[i].sh_flags == (Elf.Section.SHF_WRITE \| Elf.Section.SHF_ALLOC)) {
	bss += sections[i].sh_size;
	}
	}
	}

	return new Sizes(text, data, bss);
	}

	}