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LibELF: Implement GNU Hashing algorithm for dyn relocations

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This commit is contained in:
Sahan Fernando 2021-01-06 01:53:01 +11:00 • committed by Andreas Kling
parent 2444bf6d3b
commit b370ee3423
2 changed files with 88 additions and 19 deletions
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14
Libraries/LibELF/DynamicObject.h
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@ -204,15 +204,15 @@ public:
class HashSection : public Section {
public:
HashSection(const Section& section, HashType hash_type = HashType::SYSV)
HashSection(const Section& section, HashType hash_type)
: Section(section.m_dynamic, section.m_section_offset, section.m_section_size_bytes, section.m_entry_size, section.m_name)
{
switch (hash_type) {
case HashType::SYSV:
m_hash_function = &HashSection::calculate_elf_hash;
m_lookup_function = &HashSection::lookup_elf_symbol;
break;
case HashType::GNU:
m_hash_function = &HashSection::calculate_gnu_hash;
m_lookup_function = &HashSection::lookup_gnu_symbol;
break;
default:
ASSERT_NOT_REACHED();
@ -226,8 +226,11 @@ public:
u32 calculate_elf_hash(const char* name) const;
u32 calculate_gnu_hash(const char* name) const;
typedef u32 (HashSection::*HashFunction)(const char*) const;
HashFunction m_hash_function;
const DynamicObject::Symbol lookup_elf_symbol(const char* name) const;
const DynamicObject::Symbol lookup_gnu_symbol(const char* name) const;
typedef const DynamicObject::Symbol (HashSection::*LookupFunction)(const char*) const;
LookupFunction m_lookup_function;
};
unsigned symbol_count() const { return m_symbol_count; }
@ -318,6 +321,7 @@ private:
size_t m_fini_array_size { 0 };
FlatPtr m_hash_table_offset { 0 };
HashType m_hash_type { HashType::SYSV };
FlatPtr m_string_table_offset { 0 };
size_t m_size_of_string_table { 0 };