core_reloc_nesting
.output = NESTING_DATA(core_reloc_nesting), \
.output_len = sizeof(struct core_reloc_nesting) \
void f(struct core_reloc_nesting x) {}
struct core_reloc_nesting *in = (void *)&data.in;
struct core_reloc_nesting *out = (void *)&data.out;