Messages in this thread | | | From | Linus Torvalds <> | Date | Mon, 29 Apr 2019 13:07:33 -0700 | Subject | Re: [PATCH 3/4] x86/ftrace: make ftrace_int3_handler() not to skip fops invocation |
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On Mon, Apr 29, 2019 at 12:24 PM Andy Lutomirski <luto@kernel.org> wrote: > > Side note: we *already* depend on sti shadow working in other parts of the kernel, namely sti->iret. > > Where? STI; IRET would be nuts.
Sorry, not 'sti;iret' but 'sti;sysexit'
> before commit 4214a16b02971c60960afd675d03544e109e0d75 > x86/asm/entry/64/compat: Use SYSRETL to return from compat mode SYSENTER > > we did sti; sysxit, but, when we discussed this, I don't recall anyone > speaking up in favor of the safely of the old code.
We still have that sti sysexit in the 32-bit code.
Linus
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