mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-28 23:31:56 +00:00
115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
/* -*- Mode: C++ -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is ``elf_symbol_table''
|
|
*
|
|
* The Initial Developer of the Original Code is Netscape
|
|
* Communications Corp. Portions created by the Initial Developer are
|
|
* Copyright (C) 2001 the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Chris Waterson <waterson@netscape.com>
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef elf_symbol_table_h__
|
|
#define elf_symbol_table_h__
|
|
|
|
/*
|
|
|
|
Utility class for reading ELF symbol tables.
|
|
|
|
*/
|
|
|
|
#include <elf.h>
|
|
#include <sys/mman.h>
|
|
|
|
#include "interval_map.h"
|
|
|
|
class elf_symbol_table {
|
|
protected:
|
|
int m_fd;
|
|
void *m_mapping;
|
|
size_t m_size;
|
|
const char *m_strtab;
|
|
const Elf32_Sym *m_symbols;
|
|
int m_nsymbols;
|
|
int m_text_shndx;
|
|
|
|
typedef interval_map<unsigned int, const Elf32_Sym *> rsymtab_t;
|
|
rsymtab_t m_rsymtab;
|
|
|
|
int verify_elf_header(const Elf32_Ehdr *hdr);
|
|
int finish();
|
|
|
|
public:
|
|
elf_symbol_table()
|
|
: m_fd(-1),
|
|
m_mapping(MAP_FAILED),
|
|
m_size(0),
|
|
m_strtab(0),
|
|
m_symbols(0),
|
|
m_nsymbols(0),
|
|
m_text_shndx(0) {}
|
|
|
|
~elf_symbol_table() { finish(); }
|
|
|
|
/**
|
|
* Read the symbol table information from the specified file. (This will
|
|
* memory-map the file.)
|
|
*
|
|
* Currently, only symbols from the `.text' section are loaded.
|
|
*/
|
|
int init(const char *file);
|
|
|
|
/**
|
|
* Determine what symbol the specified image address corresponds
|
|
* to. Addresses need not refer to a symbol's start address:
|
|
* symbol size information is used to reverse-map the address.
|
|
*/
|
|
const Elf32_Sym *lookup(unsigned int addr) const;
|
|
|
|
/**
|
|
* Determine the symbol name for the specified symbol.
|
|
*/
|
|
const char *get_symbol_name(const Elf32_Sym *sym) const;
|
|
|
|
/**
|
|
* Return `true' if the specified symbol is a function.
|
|
*/
|
|
bool is_function(const Elf32_Sym *sym) const {
|
|
return (sym->st_size > 0) &&
|
|
(ELF32_ST_TYPE(sym->st_info) == STT_FUNC) &&
|
|
(sym->st_shndx == m_text_shndx); }
|
|
|
|
typedef const Elf32_Sym *const_iterator;
|
|
|
|
const_iterator begin() const { return const_iterator(m_symbols); }
|
|
const_iterator end() const { return const_iterator(m_symbols + m_nsymbols); }
|
|
};
|
|
|
|
#endif // elf_symbol_table_h__
|