Control-flow processor exceptions (single-stepping on branches) on control-flow branch instructions (jmp/call/ret)

"single-stepping on branches" is processor hardware feature of x86/Intel architecture. When it is enabled, the processor generates a single-step debug exception only after instructions that cause a branch. This mechanism
allows a debugger to single-step on control transfers caused by branches. What does this imply to defense against control-flow hijacking attacks (e.g. ROP or JOP) ? 

Latest researching status of ROP/JOP attacks and defenses

Control Flow Hijacking, like ROP, becomes a hot topic in recent years since ever DEP(W^X enforcement) and SMEP were introduced in h/w processor. Based upon the papers that I read recently, this post just gives a brief introduction on the recent researching status (though incomplete) about control flow attacks and defenses. 

Control Flow Integrity (CFI)

Traditionally, arbitrary malicious code execution (e.g. caused by buffer overflow, stack or heap manipulation) is one of major threats in computer security. 

But due to the fact that there are many hardware-enforced security features are introduced in recent processors, for example in my previous post, the attackers are starting to explore the other advanced techniques.