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LibELF: Split do_relocation into do_{direct,plt}_relocation

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No functional changes intended. This is in preparation of a commit that
overhauls how IFUNCs are resolved.

This commit lets us move the implementation of PLT patching from
`DynamicObject` to `DynamicLoader` where all other relocation code
lives. For this, got[2] now stores the loader's address instead of the
object's.
This commit is contained in:
Daniel Bertalan 2023-04-22 11:44:02 +02:00 • committed by Andreas Kling
parent c4e0f5e5ee
commit cd45c2d295
4 changed files with 82 additions and 56 deletions
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7
Userland/Libraries/LibELF/DynamicLoader.h
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@ -40,6 +40,8 @@ enum class ShouldInitializeWeak {
No
};
extern "C" FlatPtr _fixup_plt_entry(DynamicObject* object, u32 relocation_offset);
class DynamicLoader : public RefCounted<DynamicLoader> {
public:
static Result<NonnullRefPtr<DynamicLoader>, DlErrorMessage> try_create(int fd, DeprecatedString filepath);
@ -113,6 +115,8 @@ private:
ElfW(Phdr) m_program_header; // Explicitly a copy of the PHDR in the image
};
friend FlatPtr _fixup_plt_entry(DynamicObject*, u32);
// Stage 1
void load_program_headers();
@ -133,7 +137,8 @@ private:
Success = 1,
ResolveLater = 2,
};
RelocationResult do_relocation(DynamicObject::Relocation const&, ShouldInitializeWeak should_initialize_weak);
RelocationResult do_direct_relocation(DynamicObject::Relocation const&, ShouldInitializeWeak);
static RelocationResult do_plt_relocation(DynamicObject::Relocation const&);
void do_relr_relocations();
void find_tls_size_and_alignment();