39 static void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs,  in get_sigframe()  argument
42 	unsigned long sp = sigsp(regs->r29, ksig);  in get_sigframe()
47 static int setup_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc)  in setup_sigcontext()  argument
52 	err |= copy_to_user(&sc->sc_regs.r0, &regs->r00,  in setup_sigcontext()
55 	err |= __put_user(regs->sa0, &sc->sc_regs.sa0);  in setup_sigcontext()
56 	err |= __put_user(regs->lc0, &sc->sc_regs.lc0);  in setup_sigcontext()
57 	err |= __put_user(regs->sa1, &sc->sc_regs.sa1);  in setup_sigcontext()
58 	err |= __put_user(regs->lc1, &sc->sc_regs.lc1);  in setup_sigcontext()
59 	err |= __put_user(regs->m0, &sc->sc_regs.m0);  in setup_sigcontext()
60 	err |= __put_user(regs->m1, &sc->sc_regs.m1);  in setup_sigcontext()
61 	err |= __put_user(regs->usr, &sc->sc_regs.usr);  in setup_sigcontext()
62 	err |= __put_user(regs->preds, &sc->sc_regs.p3_0);  in setup_sigcontext()
63 	err |= __put_user(regs->gp, &sc->sc_regs.gp);  in setup_sigcontext()
64 	err |= __put_user(regs->ugp, &sc->sc_regs.ugp);  in setup_sigcontext()
66 	err |= __put_user(regs->cs0, &sc->sc_regs.cs0);  in setup_sigcontext()
67 	err |= __put_user(regs->cs1, &sc->sc_regs.cs1);  in setup_sigcontext()
69 	tmp = pt_elr(regs); err |= __put_user(tmp, &sc->sc_regs.pc);  in setup_sigcontext()
70 	tmp = pt_cause(regs); err |= __put_user(tmp, &sc->sc_regs.cause);  in setup_sigcontext()
71 	tmp = pt_badva(regs); err |= __put_user(tmp, &sc->sc_regs.badva);  in setup_sigcontext()
76 static int restore_sigcontext(struct pt_regs *regs,  in restore_sigcontext()  argument
82 	err |= copy_from_user(&regs->r00, &sc->sc_regs.r0,  in restore_sigcontext()
85 	err |= __get_user(regs->sa0, &sc->sc_regs.sa0);  in restore_sigcontext()
86 	err |= __get_user(regs->lc0, &sc->sc_regs.lc0);  in restore_sigcontext()
87 	err |= __get_user(regs->sa1, &sc->sc_regs.sa1);  in restore_sigcontext()
88 	err |= __get_user(regs->lc1, &sc->sc_regs.lc1);  in restore_sigcontext()
89 	err |= __get_user(regs->m0, &sc->sc_regs.m0);  in restore_sigcontext()
90 	err |= __get_user(regs->m1, &sc->sc_regs.m1);  in restore_sigcontext()
91 	err |= __get_user(regs->usr, &sc->sc_regs.usr);  in restore_sigcontext()
92 	err |= __get_user(regs->preds, &sc->sc_regs.p3_0);  in restore_sigcontext()
93 	err |= __get_user(regs->gp, &sc->sc_regs.gp);  in restore_sigcontext()
94 	err |= __get_user(regs->ugp, &sc->sc_regs.ugp);  in restore_sigcontext()
96 	err |= __get_user(regs->cs0, &sc->sc_regs.cs0);  in restore_sigcontext()
97 	err |= __get_user(regs->cs1, &sc->sc_regs.cs1);  in restore_sigcontext()
99 	err |= __get_user(tmp, &sc->sc_regs.pc); pt_set_elr(regs, tmp);  in restore_sigcontext()
108 			  struct pt_regs *regs)  in setup_rt_frame()  argument
114 	frame = get_sigframe(ksig, regs, sizeof(struct rt_sigframe));  in setup_rt_frame()
128 	err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);  in setup_rt_frame()
130 	err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));  in setup_rt_frame()
135 	regs->r0100 = ((unsigned long long)((unsigned long)&frame->info) << 32)  in setup_rt_frame()
137 	regs->r02 = (unsigned long) &frame->uc;  in setup_rt_frame()
138 	regs->r31 = (unsigned long) vdso->rt_signal_trampoline;  in setup_rt_frame()
139 	pt_psp(regs) = (unsigned long) frame;  in setup_rt_frame()
140 	pt_set_elr(regs, (unsigned long)ksig->ka.sa.sa_handler);  in setup_rt_frame()
148 static void handle_signal(struct ksignal *ksig, struct pt_regs *regs)  in handle_signal()  argument
158 	if (regs->syscall_nr >= 0) {  in handle_signal()
159 		switch (regs->r00) {  in handle_signal()
162 			regs->r00 = -EINTR;  in handle_signal()
166 				regs->r00 = -EINTR;  in handle_signal()
171 			regs->r06 = regs->syscall_nr;  in handle_signal()
172 			pt_set_elr(regs, pt_elr(regs) - 4);  in handle_signal()
173 			regs->r00 = regs->restart_r0;  in handle_signal()
185 	ret = setup_rt_frame(ksig, sigmask_to_save(), regs);  in handle_signal()
193 void do_signal(struct pt_regs *regs)  in do_signal()  argument
197 	if (!user_mode(regs))  in do_signal()
201 		handle_signal(&ksig, regs);  in do_signal()
209 	if (regs->syscall_nr >= 0) {  in do_signal()
210 		switch (regs->r00) {  in do_signal()
214 			regs->r06 = regs->syscall_nr;  in do_signal()
217 			regs->r06 = __NR_restart_syscall;  in do_signal()
222 		pt_set_elr(regs, pt_elr(regs) - 4);  in do_signal()
223 		regs->r00 = regs->restart_r0;  in do_signal()
237 	struct pt_regs *regs = current_pt_regs();  in sys_rt_sigreturn()  local
244 	frame = (struct rt_sigframe __user *)pt_psp(regs);  in sys_rt_sigreturn()
252 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))  in sys_rt_sigreturn()
256 	pt_psp(regs) = regs->r29;  in sys_rt_sigreturn()
258 	regs->syscall_nr = -1;  in sys_rt_sigreturn()
263 	return regs->r00;  in sys_rt_sigreturn()