Function structOpsSetAttachTo

struct_ops.go:228–250

structOpsSetAttachTo sets p.AttachTo in the expected "struct_name:memberName" format based on the struct definition. this relies on the assumption that each member in the `.struct_ops` section has a relocation at its starting byte offset.

(
	sec *elfSection,
	baseOff uint32,
	userSt *btf.Struct,
	progs map[string]*ProgramSpec)

// this relies on the assumption that each member in the
// `.struct_ops` section has a relocation at its starting byte offset.
func structOpsSetAttachTo(
	sec *elfSection,
	baseOff uint32,
	userSt *btf.Struct,
	progs map[string]*ProgramSpec) error {
	for _, m := range userSt.Members {
		memberOff := m.Offset
		sym, ok := sec.relocations[uint64(baseOff+memberOff.Bytes())]
		if !ok {
			continue
		}
		p, ok := progs[sym.Name]
		if !ok || p == nil {
			return fmt.Errorf("program %s not found", sym.Name)
		}

		if p.Type != StructOps {
			return fmt.Errorf("program %s is not StructOps", sym.Name)
		}
		p.AttachTo = userSt.Name + ":" + m.Name
	}
	return nil
}