29 Apr
2019
29 Apr
'19
8:07 p.m.
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