LINUX32_VDSOPAGE_SIZE
#define LINUX32_VDSOPAGE (LINUX32_MAXUSER - LINUX32_VDSOPAGE_SIZE)
LINUX32_VDSOPAGE_SIZE, imgp);
MPASS(linux_szsigcode <= LINUX32_VDSOPAGE_SIZE);
(&linux_vdso_mapping, LINUX32_VDSOPAGE_SIZE);
linux_vdso_mapping, LINUX32_VDSOPAGE_SIZE);