Messages in this thread | | | Date | Thu, 2 Apr 2020 17:27:17 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH 4/7] objtool: Add support for return trampoline call |
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On Thu, Apr 02, 2020 at 10:22:17AM +0200, Alexandre Chartre wrote: > With retpoline, the return instruction is used to branch to an address > stored on the stack. So, unlike a regular return instruction, when a > retpoline return instruction is reached the stack has been modified > compared to what we have when the function was entered. > > Provide the mechanism to explicitly call-out such return instruction > so that objtool can correctly handle them.
https://lkml.kernel.org/r/20200331222703.GH2452@worktop.programming.kicks-ass.net
And also, the split out version:
https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git/commit/?h=core/objtool&id=ec9d9549901dfd2ff411676dfc624e50219e4d5a
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