Date: Thu, 2 Dec 2010 12:44:51 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/fs/procfs procfs_fpregs.c procfs_regs.c Message-ID: <201012021245.oB2Cj7Dd006661@repoman.freebsd.org>
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kib 2010-12-02 12:44:51 UTC
FreeBSD src repository
Modified files:
sys/fs/procfs procfs_fpregs.c procfs_regs.c
Log:
SVN rev 216120 on 2010-12-02 12:44:51Z by kib
For non-stopped threads, td_frame pointer is undefined. As a
consequence, fill_regs() and fill_fpregs() access random data, usually
on the thread kernel stack. Most often the td_frame points to the
previous frame saved by last kernel entry sequence, but this is not
guaranteed.
For /proc/<pid>/{regs,fpregs} read access, require the thread to be in
stopped state. Otherwise, return EBUSY as is done for write case.
Reported and tested by: pho
Approved by: des (procfs maintainer)
MFC after: 1 week
Revision Changes Path
1.36 +4 -0 src/sys/fs/procfs/procfs_fpregs.c
1.35 +4 -0 src/sys/fs/procfs/procfs_regs.c
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