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1682f0b760
SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Expression.h"
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#include <AK/MemoryStream.h>
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#include <sys/arch/i386/regs.h>
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namespace Debug::Dwarf::Expression {
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Value evaluate(ReadonlyBytes bytes, const PtraceRegisters& regs)
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{
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InputMemoryStream stream(bytes);
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while (!stream.eof()) {
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u8 opcode = 0;
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stream >> opcode;
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switch (static_cast<Operations>(opcode)) {
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case Operations::RegEbp: {
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ssize_t offset = 0;
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stream.read_LEB128_signed(offset);
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return Value { Type::UnsignedIntetger, regs.ebp + offset };
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}
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case Operations::FbReg: {
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ssize_t offset = 0;
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stream.read_LEB128_signed(offset);
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return Value { Type::UnsignedIntetger, regs.ebp + 2 * sizeof(size_t) + offset };
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}
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default:
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dbgln("DWARF expr addr: {}", (const void*)bytes.data());
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dbgln("unsupported opcode: {}", (u8)opcode);
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VERIFY_NOT_REACHED();
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}
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}
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VERIFY_NOT_REACHED();
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}
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}
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