src-test2/lib/libc/ia64/sys/getcontext.S, branch release/6.2.0_cvsFreeBSD source treehttps://cgit-dev.freebsd.org/src-test2/atom?h=release%2F6.2.0_cvs2007-01-11T22:54:46ZThis commit was manufactured by cvs2svn to create tag2007-01-11T22:54:46Zcvs2svncvs2svn@FreeBSD.org2007-01-11T22:54:46Zurn:sha1:201f78d6b90635d961fa373ecd706e3786333b7e
'RELENG_6_2_0_RELEASE'.
This commit was manufactured to restore the state of the 6.2-RELEASE image.
Override the default stubs for getcontext(2) and swapcontext(2) so2003-08-02T00:49:36ZMarcel Moolenaarmarcel@FreeBSD.org2003-08-02T00:49:36Zurn:sha1:8955f59879ecee09cc199abac33fdc914fbecedd
that we can flush the register stack prior to entering the kernel.
This avoids having dirty registers and saves us from having to
manually write them to the backing store from within the kernel.
In that respect, flushing the RSE is both functionally required as
well as performance optimal.
On average we had 18 dirty registers when getcontext(2) was called
from libthr. Since libthr does not switch back to a context created
by getcontext(2), not having dealt with the dirty registers was
harmless.