BA_PHDR
if (bootaux[BA_PHDR].ba_ptr == NULL)
bootaux[BA_PHDR].ba_ptr = phdrbase;
phdr = (Phdr *)bootaux[BA_PHDR].ba_ptr;
phdr = (Phdr *)(bootaux[BA_PHDR].ba_val + i * phsize);
bootaux[BA_PHDR].ba_ptr = (void *)(uintptr_t)padr;