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<?php |
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/** |
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* This file is part of the reliforp/reli-prof package. |
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* |
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* (c) sji <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace Reli\Lib\Elf\SymbolResolver; |
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use Reli\Lib\ByteStream\ByteReaderInterface; |
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use Reli\Lib\Elf\Parser\Elf64Parser; |
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use Reli\Lib\Elf\Parser\ElfParserException; |
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use Reli\Lib\Elf\Structure\Elf64\Elf64GnuHashTable; |
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use Reli\Lib\Elf\Structure\Elf64\Elf64StringTable; |
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use Reli\Lib\Elf\Structure\Elf64\Elf64SymbolTable; |
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use Reli\Lib\Elf\Structure\Elf64\Elf64SymbolTableEntry; |
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final class Elf64DynamicSymbolResolver implements Elf64SymbolResolver |
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{ |
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/** |
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* @throws ElfParserException |
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*/ |
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public static function load(Elf64Parser $parser, ByteReaderInterface $php_binary): self |
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{ |
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$elf_header = $parser->parseElfHeader($php_binary); |
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$elf_program_header = $parser->parseProgramHeader($php_binary, $elf_header); |
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$elf_dynamic_array = $parser->parseDynamicStructureArray($php_binary, $elf_program_header->findDynamic()[0]); |
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$elf_string_table = $parser->parseStringTable($php_binary, $elf_dynamic_array); |
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$elf_gnu_hash_table = $parser->parseGnuHashTable($php_binary, $elf_dynamic_array); |
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if (is_null($elf_gnu_hash_table)) { |
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throw new ElfParserException('cannot find gnu hash table'); |
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} |
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$elf_symbol_table = $parser->parseSymbolTableFromDynamic( |
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$php_binary, |
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$elf_dynamic_array, |
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$elf_gnu_hash_table->getNumberOfSymbols() |
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); |
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return new self( |
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$elf_symbol_table, |
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$elf_gnu_hash_table, |
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$elf_string_table |
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); |
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} |
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public function __construct( |
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private Elf64SymbolTable $symbol_table, |
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private Elf64GnuHashTable $hash_table, |
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private Elf64StringTable $string_table, |
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) { |
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} |
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public function resolve(string $symbol_name): Elf64SymbolTableEntry |
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{ |
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$index = $this->hash_table->lookup($symbol_name, function (string $name, int $index) { |
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$symbol = $this->symbol_table->lookup($index); |
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return $name === $this->string_table->lookup($symbol->st_name); |
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}); |
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return $this->symbol_table->lookup($index); |
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} |
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} |
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reliforp /
reli-prof
