powerpc/kernel/signal_64.c

87 static void prepare_setup_sigcontext(struct task_struct *tsk)
91 	if (tsk->thread.used_vr)
92 		flush_altivec_to_thread(tsk);
94 		tsk->thread.vrsave = mfspr(SPRN_VRSAVE);
97 	flush_fp_to_thread(tsk);
100 	if (tsk->thread.used_vsr)
101 		flush_vsx_to_thread(tsk);
109 #define unsafe_setup_sigcontext(sc, tsk, signr, set, handler, ctx_has_vsx_region, label)\
111 	if (__unsafe_setup_sigcontext(sc, tsk, signr, set, handler, ctx_has_vsx_region))\
115 					struct task_struct *tsk, int signr, sigset_t *set,
129 	struct pt_regs *regs = tsk->thread.regs;
134 	BUG_ON(tsk != current);
140 	if (tsk->thread.used_vr) {
142 		unsafe_copy_to_user(v_regs, &tsk->thread.vr_state,
152 	unsafe_put_user(tsk->thread.vrsave, (u32 __user *)&v_regs[33], efault_out);
157 	unsafe_copy_fpr_to_user(&sc->fp_regs, tsk, efault_out);
170 	if (tsk->thread.used_vsr && ctx_has_vsx_region) {
172 		unsafe_copy_vsx_to_user(v_regs, tsk, efault_out);
208 				 struct task_struct *tsk,
224 	struct pt_regs *regs = tsk->thread.regs;
227 	BUG_ON(tsk != current);
237 	msr |= tsk->thread.ckpt_regs.msr & (MSR_FP | MSR_VEC | MSR_VSX);
244 	if (tsk->thread.used_vr) {
246 		err |= __copy_to_user(v_regs, &tsk->thread.ckvr_state,
253 					      &tsk->thread.vr_state,
257 					      &tsk->thread.ckvr_state,
269 		tsk->thread.ckvrsave = mfspr(SPRN_VRSAVE);
270 	err |= __put_user(tsk->thread.ckvrsave, (u32 __user *)&v_regs[33]);
272 		err |= __put_user(tsk->thread.vrsave,
275 		err |= __put_user(tsk->thread.ckvrsave,
284 	err |= copy_ckfpr_to_user(&sc->fp_regs, tsk);
286 		err |= copy_fpr_to_user(&tm_sc->fp_regs, tsk);
288 		err |= copy_ckfpr_to_user(&tm_sc->fp_regs, tsk);
296 	if (tsk->thread.used_vsr) {
300 		err |= copy_ckvsx_to_user(v_regs, tsk);
303 			err |= copy_vsx_to_user(tm_v_regs, tsk);
305 			err |= copy_ckvsx_to_user(tm_v_regs, tsk);
318 			      &tsk->thread.ckpt_regs, GP_REGS_SIZE);
333 #define unsafe_restore_sigcontext(tsk, set, sig, sc, label) do {	\
334 	if (__unsafe_restore_sigcontext(tsk, set, sig, sc))		\
337 static long notrace __unsafe_restore_sigcontext(struct task_struct *tsk, sigset_t *set,
345 	struct pt_regs *regs = tsk->thread.regs;
350 	BUG_ON(tsk != current);
395 		unsafe_copy_from_user(&tsk->thread.vr_state, v_regs,
397 		tsk->thread.used_vr = true;
398 	} else if (tsk->thread.used_vr) {
399 		memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
403 		unsafe_get_user(tsk->thread.vrsave, (u32 __user *)&v_regs[33], efault_out);
405 		tsk->thread.vrsave = 0;
407 		mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
410 	unsafe_copy_fpr_from_user(tsk, &sc->fp_regs, efault_out);
419 		unsafe_copy_vsx_from_user(tsk, v_regs, efault_out);
420 		tsk->thread.used_vsr = true;
423 			tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
437 static long restore_tm_sigcontexts(struct task_struct *tsk,
446 	struct pt_regs *regs = tsk->thread.regs;
451 	BUG_ON(tsk != current);
458 	err |= __copy_from_user(&tsk->thread.ckpt_regs, sc->gp_regs,
470 	err |= __get_user(tsk->thread.tm_tfhar, &sc->gp_regs[PT_NIP]);
486 	err |= __get_user(tsk->thread.ckpt_regs.ctr,
488 	err |= __get_user(tsk->thread.ckpt_regs.link,
490 	err |= __get_user(tsk->thread.ckpt_regs.xer,
492 	err |= __get_user(tsk->thread.ckpt_regs.ccr,
503 	 * This has to be done before copying stuff into tsk->thread.fpr/vr
519 		err |= __copy_from_user(&tsk->thread.ckvr_state, v_regs,
521 		err |= __copy_from_user(&tsk->thread.vr_state, tm_v_regs,
525 	else if (tsk->thread.used_vr) {
526 		memset(&tsk->thread.vr_state, 0, 33 * sizeof(vector128));
527 		memset(&tsk->thread.ckvr_state, 0, 33 * sizeof(vector128));
531 		err |= __get_user(tsk->thread.ckvrsave,
533 		err |= __get_user(tsk->thread.vrsave,
537 		tsk->thread.vrsave = 0;
538 		tsk->thread.ckvrsave = 0;
541 		mtspr(SPRN_VRSAVE, tsk->thread.vrsave);
544 	err |= copy_fpr_from_user(tsk, &tm_sc->fp_regs);
545 	err |= copy_ckfpr_from_user(tsk, &sc->fp_regs);
555 		err |= copy_vsx_from_user(tsk, tm_v_regs);
556 		err |= copy_ckvsx_from_user(tsk, v_regs);
557 		tsk->thread.used_vsr = true;
560 			tsk->thread.fp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
561 			tsk->thread.ckfp_state.fpr[i][TS_VSRLOWOFFSET] = 0;
567 	tsk->thread.tm_texasr |= TEXASR_FS;
597 	tm_recheckpoint(&tsk->thread);
601 		load_fp_state(&tsk->thread.fp_state);
602 		regs_set_return_msr(regs, regs->msr | (MSR_FP | tsk->thread.fpexc_mode));
605 		load_vr_state(&tsk->thread.vr_state);
614 static long restore_tm_sigcontexts(struct task_struct *tsk, struct sigcontext __user *sc,
858 		struct task_struct *tsk)
863 	struct pt_regs *regs = tsk->thread.regs;
867 	frame = get_sigframe(ksig, tsk, sizeof(*frame), 0);
874 		prepare_setup_sigcontext(tsk);
897 					    tsk, ksig->sig, NULL,
908 		unsafe_setup_sigcontext(&frame->uc.uc_mcontext, tsk, ksig->sig,
921 	tsk->thread.fp_state.fpscr = 0;
924 	if (tsk->mm->context.vdso) {
925 		regs_set_return_ip(regs, VDSO64_SYMBOL(tsk->mm->context.vdso, sigtramp_rt64));