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author | Suresh Siddha <suresh.b.siddha@intel.com> | 2008-07-29 10:29:25 -0700 |
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committer | Ingo Molnar <mingo@elte.hu> | 2008-07-30 19:49:27 +0200 |
commit | c37b5efea43f9e500363f9973dd00e3d2cdcc685 (patch) | |
tree | 9ce635f1672099dafcd78e535b4ea18d80235d8f /samples | |
parent | bdd8caba5ed5bb7ee21c9f061597284ffeb280bf (diff) |
x86, xsave: save/restore the extended state context in sigframe
On cpu's supporting xsave/xrstor, fpstate pointer in the sigcontext, will
include the extended state information along with fpstate information. Presence
of extended state information is indicated by the presence
of FP_XSTATE_MAGIC1 at fpstate.sw_reserved.magic1 and FP_XSTATE_MAGIC2
at fpstate + (fpstate.sw_reserved.extended_size - FP_XSTATE_MAGIC2_SIZE).
Extended feature bit mask that is saved in the memory layout is represented
by the fpstate.sw_reserved.xstate_bv
For RT signal frames, UC_FP_XSTATE in the uc_flags also indicate the
presence of extended state information in the sigcontext's fpstate
pointer.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions