kernel/fpu/signal.c

172  * 'buf_fx' is the 64-byte aligned pointer at which the [f|fx|x]save
174  *  'buf' points to the 'buf_fx' or to the fsave header followed by 'buf_fx'.
176  *	buf == buf_fx for 64-bit frames and 32-bit fsave frame.
177  *	buf != buf_fx for 32-bit frames with fxstate.
183  * the aligned state at 'buf_fx'.
188 bool copy_fpstate_to_sigframe(void __user *buf, void __user *buf_fx, int size)
192 	bool ia32_fxstate = (buf != buf_fx);
210 		struct xregs_state __user *xbuf = buf_fx;
231 	ret = copy_fpregs_to_sigframe(buf_fx);
236 		if (!__clear_user(buf_fx, fpstate->user_size))
245 	if (use_fxsr() && !save_xstate_epilog(buf_fx, ia32_fxstate, fpstate))
335 static bool __fpu_restore_sig(void __user *buf, void __user *buf_fx,
348 		if (!check_xstate_in_sigframe(buf_fx, &fx_sw_user))
359 		return restore_fpregs_from_user(buf_fx, user_xfeatures, fx_only);
396 		if (copy_sigframe_from_user_to_xstate(tsk, buf_fx))
399 		if (__copy_from_user(&fpregs->fxsave, buf_fx,
460 	void __user *buf_fx = buf;
480 		buf_fx = buf + sizeof(struct fregs_state);
493 		success = __fpu_restore_sig(buf, buf_fx, ia32_fxstate);
504 		     unsigned long *buf_fx, unsigned long *size)
508 	*buf_fx = sp = round_down(sp - frame_size, 64);