1 // SPDX-License-Identifier: GPL-2.0-only
5  * Copyright (c) 2010-2012, The Linux Foundation. All rights reserved.
30 	unsigned long sp = sigsp(regs->r29, ksig);  in get_sigframe()
32 	return (void __user *)((sp - frame_size) & ~(sizeof(long long) - 1));  in get_sigframe()
40 	err |= copy_to_user(&sc->sc_regs.r0, &regs->r00,  in setup_sigcontext()
43 	err |= __put_user(regs->sa0, &sc->sc_regs.sa0);  in setup_sigcontext()
44 	err |= __put_user(regs->lc0, &sc->sc_regs.lc0);  in setup_sigcontext()
45 	err |= __put_user(regs->sa1, &sc->sc_regs.sa1);  in setup_sigcontext()
46 	err |= __put_user(regs->lc1, &sc->sc_regs.lc1);  in setup_sigcontext()
47 	err |= __put_user(regs->m0, &sc->sc_regs.m0);  in setup_sigcontext()
48 	err |= __put_user(regs->m1, &sc->sc_regs.m1);  in setup_sigcontext()
49 	err |= __put_user(regs->usr, &sc->sc_regs.usr);  in setup_sigcontext()
50 	err |= __put_user(regs->preds, &sc->sc_regs.p3_0);  in setup_sigcontext()
51 	err |= __put_user(regs->gp, &sc->sc_regs.gp);  in setup_sigcontext()
52 	err |= __put_user(regs->ugp, &sc->sc_regs.ugp);  in setup_sigcontext()
54 	err |= __put_user(regs->cs0, &sc->sc_regs.cs0);  in setup_sigcontext()
55 	err |= __put_user(regs->cs1, &sc->sc_regs.cs1);  in setup_sigcontext()
57 	tmp = pt_elr(regs); err |= __put_user(tmp, &sc->sc_regs.pc);  in setup_sigcontext()
58 	tmp = pt_cause(regs); err |= __put_user(tmp, &sc->sc_regs.cause);  in setup_sigcontext()
59 	tmp = pt_badva(regs); err |= __put_user(tmp, &sc->sc_regs.badva);  in setup_sigcontext()
70 	err |= copy_from_user(&regs->r00, &sc->sc_regs.r0,  in restore_sigcontext()
73 	err |= __get_user(regs->sa0, &sc->sc_regs.sa0);  in restore_sigcontext()
74 	err |= __get_user(regs->lc0, &sc->sc_regs.lc0);  in restore_sigcontext()
75 	err |= __get_user(regs->sa1, &sc->sc_regs.sa1);  in restore_sigcontext()
76 	err |= __get_user(regs->lc1, &sc->sc_regs.lc1);  in restore_sigcontext()
77 	err |= __get_user(regs->m0, &sc->sc_regs.m0);  in restore_sigcontext()
78 	err |= __get_user(regs->m1, &sc->sc_regs.m1);  in restore_sigcontext()
79 	err |= __get_user(regs->usr, &sc->sc_regs.usr);  in restore_sigcontext()
80 	err |= __get_user(regs->preds, &sc->sc_regs.p3_0);  in restore_sigcontext()
81 	err |= __get_user(regs->gp, &sc->sc_regs.gp);  in restore_sigcontext()
82 	err |= __get_user(regs->ugp, &sc->sc_regs.ugp);  in restore_sigcontext()
84 	err |= __get_user(regs->cs0, &sc->sc_regs.cs0);  in restore_sigcontext()
85 	err |= __get_user(regs->cs1, &sc->sc_regs.cs1);  in restore_sigcontext()
87 	err |= __get_user(tmp, &sc->sc_regs.pc); pt_set_elr(regs, tmp);  in restore_sigcontext()
100 	struct hexagon_vdso *vdso = current->mm->context.vdso;  in setup_rt_frame()
105 		return -EFAULT;  in setup_rt_frame()
107 	if (copy_siginfo_to_user(&frame->info, &ksig->info))  in setup_rt_frame()
108 		return -EFAULT;  in setup_rt_frame()
110 	/* The on-stack signal trampoline is no longer executed;  in setup_rt_frame()
114 	err |= __put_user(0x7800d166, &frame->tramp[0]);  in setup_rt_frame()
115 	err |= __put_user(0x5400c004, &frame->tramp[1]);  in setup_rt_frame()
116 	err |= setup_sigcontext(regs, &frame->uc.uc_mcontext);  in setup_rt_frame()
117 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));  in setup_rt_frame()
118 	err |= __save_altstack(&frame->uc.uc_stack, user_stack_pointer(regs));  in setup_rt_frame()
120 		return -EFAULT;  in setup_rt_frame()
123 	regs->r0100 = ((unsigned long long)((unsigned long)&frame->info) << 32)  in setup_rt_frame()
124 		| (unsigned long long)ksig->sig;  in setup_rt_frame()
125 	regs->r02 = (unsigned long) &frame->uc;  in setup_rt_frame()
126 	regs->r31 = (unsigned long) vdso->rt_signal_trampoline;  in setup_rt_frame()
128 	pt_set_elr(regs, (unsigned long)ksig->ka.sa.sa_handler);  in setup_rt_frame()
146 	if (regs->syscall_nr >= 0) {  in handle_signal()
147 		switch (regs->r00) {  in handle_signal()
148 		case -ERESTART_RESTARTBLOCK:  in handle_signal()
149 		case -ERESTARTNOHAND:  in handle_signal()
150 			regs->r00 = -EINTR;  in handle_signal()
152 		case -ERESTARTSYS:  in handle_signal()
153 			if (!(ksig->ka.sa.sa_flags & SA_RESTART)) {  in handle_signal()
154 				regs->r00 = -EINTR;  in handle_signal()
158 		case -ERESTARTNOINTR:  in handle_signal()
159 			regs->r06 = regs->syscall_nr;  in handle_signal()
160 			pt_set_elr(regs, pt_elr(regs) - 4);  in handle_signal()
161 			regs->r00 = regs->restart_r0;  in handle_signal()
163 		default:  in handle_signal()
179  * Called from return-from-event code.
197 	if (regs->syscall_nr >= 0) {  in do_signal()
198 		switch (regs->r00) {  in do_signal()
199 		case -ERESTARTNOHAND:  in do_signal()
200 		case -ERESTARTSYS:  in do_signal()
201 		case -ERESTARTNOINTR:  in do_signal()
202 			regs->r06 = regs->syscall_nr;  in do_signal()
204 		case -ERESTART_RESTARTBLOCK:  in do_signal()
205 			regs->r06 = __NR_restart_syscall;  in do_signal()
207 		default:  in do_signal()
210 		pt_set_elr(regs, pt_elr(regs) - 4);  in do_signal()
211 		regs->r00 = regs->restart_r0;  in do_signal()
220  * Architecture-specific wrappers for signal-related system calls
227 	sigset_t blocked;  in SYSCALL_DEFINE0()  local
229 	/* Always make any pending restarted system calls return -EINTR */  in SYSCALL_DEFINE0()
230 	current->restart_block.fn = do_no_restart_syscall;  in SYSCALL_DEFINE0()
235 	if (__copy_from_user(&blocked, &frame->uc.uc_sigmask, sizeof(blocked)))  in SYSCALL_DEFINE0()
238 	set_current_blocked(&blocked);  in SYSCALL_DEFINE0()
240 	if (restore_sigcontext(regs, &frame->uc.uc_mcontext))  in SYSCALL_DEFINE0()
244 	pt_psp(regs) = regs->r29;  in SYSCALL_DEFINE0()
246 	regs->syscall_nr = -1;  in SYSCALL_DEFINE0()
248 	if (restore_altstack(&frame->uc.uc_stack))  in SYSCALL_DEFINE0()
251 	return regs->r00;  in SYSCALL_DEFINE0()