Method loadRelocations

elf_reader.go:339–364

loadRelocations iterates .rel* sections and extracts relocation entries for sections of interest. Makes sure relocations point at valid sections.

(relSections map[elf.SectionIndex]*elf.Section, symbols []elf.Symbol)

// loadRelocations iterates .rel* sections and extracts relocation entries for
// sections of interest. Makes sure relocations point at valid sections.
func (ec *elfCode) loadRelocations(relSections map[elf.SectionIndex]*elf.Section, symbols []elf.Symbol) error {
	for idx, relSection := range relSections {
		section := ec.sections[idx]
		if section == nil {
			continue
		}

		rels, err := ec.loadSectionRelocations(relSection, symbols)
		if err != nil {
			return fmt.Errorf("relocation for section %q: %w", section.Name, err)
		}

		for _, rel := range rels {
			target := ec.sections[rel.Section]
			if target == nil {
				return fmt.Errorf("section %q: reference to %q in section %s: %w", section.Name, rel.Name, rel.Section, ErrNotSupported)
			}

			target.references++
		}

		section.relocations = rels
	}

	return nil
}

// loadProgramSections iterates ec's sections and emits a ProgramSpec
// for each function it finds.