6e8e1cee9b
This patch switches from using a forked version of one of the libraries of goretk/gore to using the module directly. This is possible now that certain functionality has been exposed / fixed within that module making it usable for Delve.
73 lines
2.1 KiB
Go
73 lines
2.1 KiB
Go
// This file is part of GoRE.
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//
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// Copyright (C) 2019-2021 GoRE Authors
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package gore
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import (
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"bytes"
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"encoding/binary"
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"fmt"
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)
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var (
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goNoteNameELF = []byte("Go\x00\x00")
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goNoteRawStart = []byte("\xff Go build ID: \"")
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goNoteRawEnd = []byte("\"\n \xff")
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)
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func parseBuildIDFromElf(data []byte, byteOrder binary.ByteOrder) (string, error) {
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r := bytes.NewReader(data)
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var nameLen uint32
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var idLen uint32
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var tag uint32
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err := binary.Read(r, byteOrder, &nameLen)
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if err != nil {
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return "", fmt.Errorf("error when reading the BuildID name length: %w", err)
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}
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err = binary.Read(r, byteOrder, &idLen)
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if err != nil {
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return "", fmt.Errorf("error when reading the BuildID ID length: %w", err)
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}
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err = binary.Read(r, byteOrder, &tag)
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if err != nil {
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return "", fmt.Errorf("error when reading the BuildID tag: %w", err)
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}
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if tag != uint32(4) {
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return "", fmt.Errorf("build ID does not match expected value. 0x%x parsed", tag)
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}
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noteName := data[12 : 12+int(nameLen)]
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if !bytes.Equal(noteName, goNoteNameELF) {
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return "", fmt.Errorf("note name not as expected")
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}
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return string(data[16 : 16+int(idLen)]), nil
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}
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func parseBuildIDFromRaw(data []byte) (string, error) {
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idx := bytes.Index(data, goNoteRawStart)
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if idx < 0 {
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// No Build ID
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return "", nil
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}
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end := bytes.Index(data, goNoteRawEnd)
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if end < 0 {
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return "", fmt.Errorf("malformed Build ID")
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}
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return string(data[idx+len(goNoteRawStart) : end]), nil
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}
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