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LibELF: Refactor how arch-specific dynamic relocation types are handled

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We currently expect that the relocation type numbers are unique across
all architectures. But RISC-V and x86_64 use the same numbers for
different relocation types (R_X86_64_COPY = R_RISCV_JUMP_SLOT = 5).

So create a generic reloc type enum which maps to the arch-specific
reloc types instead of checking for all arch reloc types individually
everywhere.
This commit is contained in:
Sönke Holz 2024-02-10 20:43:07 +01:00 • committed by Andrew Kaster
parent c216e7439f
commit f8628f94b8
6 changed files with 98 additions and 23 deletions
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3
Userland/Libraries/LibELF/Relocation.cpp
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@ -4,6 +4,7 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibELF/Arch/GenericDynamicRelocationType.h>
#include <LibELF/ELFABI.h>
#include <LibELF/Relocation.h>
@ -59,7 +60,7 @@ bool perform_relative_relocations(FlatPtr base_address)
for (unsigned i = 0; i < relocation_count; ++i) {
size_t offset_in_section = i * relocation_entry_size;
auto* relocation = (Elf_Rela*)(relocation_section_addr + offset_in_section);
VERIFY(ELF64_R_TYPE(relocation->r_info) == R_X86_64_RELATIVE || ELF64_R_TYPE(relocation->r_info) == R_AARCH64_RELATIVE);
VERIFY(static_cast<GenericDynamicRelocationType>(ELF64_R_TYPE(relocation->r_info)) == GenericDynamicRelocationType::RELATIVE);
auto* patch_address = (FlatPtr*)(base_address + relocation->r_offset);
FlatPtr relocated_address;
if (use_addend) {