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* kernel/bpf/core.o: warning: objtool: ___bpf_prog_run.cold()+0x7: call without frame pointer save/setup
@ 2019-08-26 14:42 He Zhe
  2019-08-26 15:11 ` Greg KH
  2019-08-26 15:18 ` Josh Poimboeuf
  0 siblings, 2 replies; 5+ messages in thread
From: He Zhe @ 2019-08-26 14:42 UTC (permalink / raw)
  To: ast, daniel, kafai, songliubraving, yhs, ndesaulniers,
	miguel.ojeda.sandonis, luc.vanoostenryck, schwidefsky, gregkh,
	mst, gor, andreyknvl, jpoimboe, liuxiaozhou, yamada.masahiro,
	linux-kernel, netdev, bpf, He Zhe

Hi All,

Since 3193c0836f20 ("bpf: Disable GCC -fgcse optimization for ___bpf_prog_run()"),
We have got the following warning,
kernel/bpf/core.o: warning: objtool: ___bpf_prog_run.cold()+0x7: call without frame pointer save/setup

If reverting the above commit, we will get the following warning,
kernel/bpf/core.o: warning: objtool: ___bpf_prog_run()+0x8b9: sibling call from callable instruction with modified stack frame
if CONFIG_RETPOLINE=n, and no warning if CONFIG_RETPOLINE=y


Zhe

^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, other threads:[~2019-08-27 14:58 UTC | newest]

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2019-08-26 14:42 kernel/bpf/core.o: warning: objtool: ___bpf_prog_run.cold()+0x7: call without frame pointer save/setup He Zhe
2019-08-26 15:11 ` Greg KH
2019-08-27  2:41   ` He Zhe
2019-08-26 15:18 ` Josh Poimboeuf
     [not found]   ` <2c416fe7-f6be-440b-b476-9fede1ea123c@windriver.com>
2019-08-27 14:58     ` Josh Poimboeuf

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