From 8ad74684ea249c179d76e2624668b6d2dd3a8085 Mon Sep 17 00:00:00 2001
From: Brendan Coles <bcoles@gmail.com>
Date: Mon, 22 Mar 2021 05:57:39 +0000
Subject: LibELF: DynamicObject: Add rpath and runpath helpers

---
 Userland/Libraries/LibELF/DynamicObject.cpp | 12 ++++++++++++
 Userland/Libraries/LibELF/DynamicObject.h   |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/Userland/Libraries/LibELF/DynamicObject.cpp b/Userland/Libraries/LibELF/DynamicObject.cpp
index 8d2b08ca6b..c379d21e82 100644
--- a/Userland/Libraries/LibELF/DynamicObject.cpp
+++ b/Userland/Libraries/LibELF/DynamicObject.cpp
@@ -72,6 +72,10 @@ void DynamicObject::dump() const
 
     if (m_has_soname)
         builder.appendff("DT_SONAME: {}\n", soname()); // FIXME: Validate that this string is null terminated?
+    if (m_has_rpath)
+        builder.appendff("DT_RPATH: {}\n", rpath());
+    if (m_has_runpath)
+        builder.appendff("DT_RUNPATH: {}\n", runpath());
 
     dbgln_if(DYNAMIC_LOAD_DEBUG, "Dynamic section at address {} contains {} entries:", m_dynamic_address.as_ptr(), num_dynamic_sections);
     dbgln_if(DYNAMIC_LOAD_DEBUG, "{}", builder.string_view());
@@ -163,6 +167,14 @@ void DynamicObject::parse()
         case DT_BIND_NOW:
             m_dt_flags |= DF_BIND_NOW;
             break;
+        case DT_RPATH:
+            m_rpath_index = entry.val();
+            m_has_rpath = true;
+            break;
+        case DT_RUNPATH:
+            m_runpath_index = entry.val();
+            m_has_runpath = true;
+            break;
         case DT_DEBUG:
             break;
         case DT_FLAGS_1:
diff --git a/Userland/Libraries/LibELF/DynamicObject.h b/Userland/Libraries/LibELF/DynamicObject.h
index 151f5d898d..8fa50bc18c 100644
--- a/Userland/Libraries/LibELF/DynamicObject.h
+++ b/Userland/Libraries/LibELF/DynamicObject.h
@@ -238,6 +238,8 @@ public:
     VirtualAddress plt_got_base_address() const { return m_base_address.offset(m_procedure_linkage_table_offset.value()); }
     VirtualAddress base_address() const { return m_base_address; }
 
+    StringView rpath() const { return m_has_rpath ? symbol_string_table_string(m_rpath_index) : StringView {}; }
+    StringView runpath() const { return m_has_runpath ? symbol_string_table_string(m_runpath_index) : StringView {}; }
     StringView soname() const { return m_has_soname ? symbol_string_table_string(m_soname_index) : StringView {}; }
 
     Optional<FlatPtr> tls_offset() const { return m_tls_offset; }
@@ -320,6 +322,10 @@ private:
 
     bool m_has_soname { false };
     Elf32_Word m_soname_index { 0 }; // Index into dynstr table for SONAME
+    bool m_has_rpath { false };
+    Elf32_Word m_rpath_index { 0 }; // Index into dynstr table for RPATH
+    bool m_has_runpath { false };
+    Elf32_Word m_runpath_index { 0 }; // Index into dynstr table for RUNPATH
 
     Optional<FlatPtr> m_tls_offset;
     Optional<FlatPtr> m_tls_size;
-- 
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