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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
// -*- Mode: C++ -*-
//
// Copyright (C) 2013-2025 Red Hat, Inc.
//
// Author: Dodji Seketeli
/// @file
///
/// This program takes parameters to open an elf file, lookup a symbol
/// in its symbol tables and report what it sees.
#include <libgen.h>
#include <elf.h>
#include <cstring>
#include <iostream>
#include <sstream>
#include "abg-config.h"
#include "abg-dwarf-reader.h"
#include "abg-ir.h"
#include "abg-tools-utils.h"
using std::cout;
using std::cerr;
using std::string;
using std::ostream;
using std::ostringstream;
using std::vector;
using abigail::ir::environment;
using abigail::dwarf::lookup_symbol_from_elf;
using abigail::elf_symbol;
using abigail::elf_symbol_sptr;
struct options
{
bool show_help;
bool display_version;
char* elf_path;
char* symbol_name;
bool demangle;
bool absolute_path;
options()
: show_help(false),
display_version(false),
elf_path(0),
symbol_name(0),
demangle(false),
absolute_path(true)
{}
};
static void
display_usage(const string& prog_name, ostream &out)
{
out << "usage: " << prog_name << " [options] <elf file> <symbol-name>\n"
<< "where [options] can be:\n"
<< " --help display this help string\n"
<< " --version|-v display program version information and exit\n"
<< " --demangle demangle the symbols from the symbol table\n"
<< " --no-absolute-path do not show absolute paths in messages\n";
}
static void
parse_command_line(int argc, char* argv[], options& opts)
{
if (argc < 2)
{
opts.show_help = true;
return;
}
for (int i = 1; i < argc; ++i)
{
if (argv[i][0] != '-')
{
if (!opts.elf_path)
opts.elf_path = argv[i];
else if (!opts.symbol_name)
opts.symbol_name = argv[i] ;
else
{
opts.show_help = true;
return;
}
}
else if (!strcmp(argv[i], "--help")
|| !strcmp(argv[i], "-h"))
{
opts.show_help = true;
return;
}
else if (!strcmp(argv[i], "--version")
|| !strcmp(argv[i], "-v"))
{
opts.display_version = true;
return;
}
else if (!strcmp(argv[i], "--demangle"))
opts.demangle = true;
else if (!strcmp(argv[i], "--no-absolute-path"))
opts.absolute_path = false;
else
opts.show_help = true;
}
}
int
main(int argc, char* argv[])
{
options opts;
parse_command_line(argc, argv, opts);
if (opts.show_help)
{
display_usage(argv[0], cout);
return 1;
}
if (opts.display_version)
{
abigail::tools_utils::emit_prefix(argv[0], cout)
<< abigail::tools_utils::get_library_version_string()
<< "\n";
return 0;
}
assert(opts.elf_path != 0
&& opts.symbol_name != 0);
string p = opts.elf_path, n = opts.symbol_name;
environment env;
vector<elf_symbol_sptr> syms;
if (!lookup_symbol_from_elf(env, p, n, opts.demangle, syms))
{
cout << "could not find symbol '"
<< opts.symbol_name
<< "' in file '";
if (opts.absolute_path)
cout << opts.elf_path << "'\n";
else
cout << basename(opts.elf_path);
return 0;
}
elf_symbol_sptr sym = syms[0];
cout << "found symbol '" << n << "'";
if (n != sym->get_name())
cout << " (" << sym->get_name() << ")";
cout << ", an instance of "
<< (elf_symbol::type) sym->get_type()
<< " of " << sym->get_binding();
if (syms.size() > 1 || !sym->get_version().is_empty())
{
cout << ", of version";
if (syms.size () > 1)
cout << "s";
cout << " ";
for (vector<elf_symbol_sptr>::const_iterator i = syms.begin();
i != syms.end();
++i)
{
if (i != syms.begin())
cout << ", ";
cout << "'" << (*i)->get_version().str() << "'";
}
}
cout << '\n';
return 0;
}
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