40 lines
982 B
Plaintext
40 lines
982 B
Plaintext
// Copyright 2017 Lovell Fuller and others.
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// SPDX-License-Identifier: Apache-2.0
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'use strict';
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const interpreterPath = (elf) => {
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if (elf.length < 64) {
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return null;
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}
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if (elf.readUInt32BE(0) !== 0x7F454C46) {
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// Unexpected magic bytes
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return null;
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}
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if (elf.readUInt8(4) !== 2) {
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// Not a 64-bit ELF
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return null;
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}
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if (elf.readUInt8(5) !== 1) {
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// Not little-endian
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return null;
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}
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const offset = elf.readUInt32LE(32);
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const size = elf.readUInt16LE(54);
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const count = elf.readUInt16LE(56);
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for (let i = 0; i < count; i++) {
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const headerOffset = offset + (i * size);
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const type = elf.readUInt32LE(headerOffset);
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if (type === 3) {
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const fileOffset = elf.readUInt32LE(headerOffset + 8);
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const fileSize = elf.readUInt32LE(headerOffset + 32);
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return elf.subarray(fileOffset, fileOffset + fileSize).toString().replace(/\0.*$/g, '');
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}
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}
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return null;
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};
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module.exports = {
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interpreterPath
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};
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