STACK_RND_MASK    288 arch/x86/include/asm/elf.h #define STACK_RND_MASK (0x7ff)
STACK_RND_MASK    297 arch/x86/include/asm/elf.h #define STACK_RND_MASK (test_thread_flag(TIF_ADDR32) ? 0x7ff : 0x3fffff)