From afb41a37f9f6fa9e3c2d8df35fa9c9ae215299ee Mon Sep 17 00:00:00 2001
From: Josh Ferrell <josh@vector35.com>
Date: Wed, 18 Sep 2024 16:41:09 -0400
Subject: Add support for loading symbols from .gnu_debugdata

---
 view/elf/elfview.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'view/elf/elfview.cpp')

diff --git a/view/elf/elfview.cpp b/view/elf/elfview.cpp
index 677f0b67..b90b18a7 100644
--- a/view/elf/elfview.cpp
+++ b/view/elf/elfview.cpp
@@ -1325,6 +1325,8 @@ bool ElfView::Init()
 		}
 	}
 
+	ParseMiniDebugInfo();
+
 	// Process the queued symbols
 	m_symbolQueue->Process();
 	delete m_symbolQueue;
@@ -2608,6 +2610,44 @@ bool ElfView::DerefPpc64Descriptor(BinaryReader& reader, uint64_t addr, uint64_t
 }
 
 
+void ElfView::ParseMiniDebugInfo()
+{
+	Ref<Section> gnuDebugdata = GetParentView()->GetSectionByName(".gnu_debugdata");
+	if (!gnuDebugdata)
+		return;
+
+	BinaryReader debugdataReader(GetParentView());
+	debugdataReader.Seek(gnuDebugdata->GetStart());
+
+	DataBuffer compressedDebug = debugdataReader.Read(gnuDebugdata->GetLength());
+
+	DataBuffer debugElf;
+	if (!compressedDebug.XzDecompress(debugElf))
+	{
+		m_logger->LogError("Invalid .gnu_debugdata contents: Failed to decompress");
+		return;
+	}
+
+	Ref<BinaryView> debugBv = Load(debugElf, false);
+	if (!debugBv)
+	{
+		m_logger->LogError("Invalid .gnu_debugdata contents: Failed to create BinaryView");
+		return;
+	}
+
+	for (const auto& symbol : debugBv->GetSymbols())
+	{
+		DefineElfSymbol(
+			symbol->GetType(),
+			symbol->GetRawName(),
+			GetStart() + symbol->GetAddress(),
+			false,
+			symbol->GetBinding()
+		);
+	}
+}
+
+
 vector<ElfSymbolTableEntry> ElfView::ParseSymbolTable(BinaryReader& reader, const Elf64SectionHeader& symbolSection,
 	const Elf64SectionHeader& stringSection, bool dynamic, size_t startEntry)
 {
-- 
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