XSAVE_HDR_SIZE
#define XSAVE_YMM_OFFSET (XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET)
offs = FXSAVE_SIZE + XSAVE_HDR_SIZE;
unsigned int size = FXSAVE_SIZE + XSAVE_HDR_SIZE;
u32 ret = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
char header[XSAVE_HDR_SIZE];