Date: Fri, 8 Apr 2011 13:33:57 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/amd64/amd64 exception.S Message-ID: <201104081334.p38DY9EV068146@repoman.freebsd.org>
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jhb 2011-04-08 13:33:57 UTC
FreeBSD src repository
Modified files:
sys/amd64/amd64 exception.S
Log:
SVN rev 220452 on 2011-04-08 13:33:57Z by jhb
Fix a bug in the previous change to restore the fast path for syscall
return. The ast() function may cause a context switch in which case
PCB_FULL_IRET would be set in the pcb. However, the code was not
rechecking the flag after ast() returned and would not properly restore
the FSBASE and GSBASE MSRs. To fix, recheck the PCB_FULL_IRET flag after
ast() returns.
While here, trim an instruction (and memory access) from the doreti path
and fix a typo in a comment.
MFC after: 1 week
Revision Changes Path
1.154 +5 -6 src/sys/amd64/amd64/exception.S
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