1. 03 10月, 2012 1 次提交
  2. 12 2月, 2010 1 次提交
    • S
      x86, ptrace: regset extensions to support xstate · 5b3efd50
      Suresh Siddha 提交于
      Add the xstate regset support which helps extend the kernel ptrace and the
      core-dump interfaces to support AVX state etc.
      
      This regset interface is designed to support all the future state that gets
      supported using xsave/xrstor infrastructure.
      
      Looking at the memory layout saved by "xsave", one can't say which state
      is represented in the memory layout. This is because if a particular state is
      in init state, in the xsave hdr it can be represented by bit '0'. And hence
      we can't really say by the xsave header wether a state is in init state or
      the state is not saved in the memory layout.
      
      And hence the xsave memory layout available through this regset
      interface uses SW usable bytes [464..511] to convey what state is represented
      in the memory layout.
      
      First 8 bytes of the sw_usable_bytes[464..467] will be set to OS enabled xstate
      mask(which is same as the 64bit mask returned by the xgetbv's xCR0).
      
      The note NT_X86_XSTATE represents the extended state information in the
      core file, using the above mentioned memory layout.
      Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com>
      LKML-Reference: <20100211195614.802495327@sbs-t61.sc.intel.com>
      Signed-off-by: NHongjiu Lu <hjl.tools@gmail.com>
      Cc: Roland McGrath <roland@redhat.com>
      Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
      5b3efd50
  3. 23 10月, 2008 1 次提交
  4. 08 2月, 2008 1 次提交
  5. 11 10月, 2007 1 次提交