x86, xsave: struct _fpstate extensions to include extended state information

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Bytes 464..511 in the current 512byte layout of fxsave/fxrstor
frame, are reserved for SW usage. On cpu's supporting xsave/xrstor, these bytes
are used to extended the fpstate pointer in the sigcontext, which now includes
the extended state information along with fpstate information.

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>

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Suresh Siddha 2008-07-29 10:29:24 -07:00 • committed by Ingo Molnar

parent 9dc89c0f96

commit bdd8caba5e

3 changed files with 94 additions and 6 deletions

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7

include/asm-x86/processor.h

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87

include/asm-x86/sigcontext.h

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6

include/asm-x86/sigcontext32.h

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