1 // SPDX-License-Identifier: GPL-2.0
7  *  1997-11-02  Modified for POSIX.1b signals by Richard Henderson
69 		    __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||  in SYSCALL_DEFINE3()
70 		    __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||  in SYSCALL_DEFINE3()
71 		    __get_user(mask, &act->sa_mask))  in SYSCALL_DEFINE3()
72 			return -EFAULT;  in SYSCALL_DEFINE3()
81 		    __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||  in SYSCALL_DEFINE3()
82 		    __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||  in SYSCALL_DEFINE3()
83 		    __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))  in SYSCALL_DEFINE3()
84 			return -EFAULT;  in SYSCALL_DEFINE3()
99 		return -EINVAL;  in SYSCALL_DEFINE5()
104 			return -EFAULT;  in SYSCALL_DEFINE5()
111 			return -EFAULT;  in SYSCALL_DEFINE5()
142         [offsetof(struct rt_sigframe, uc.uc_mcontext) == 176 ? 1 : -1];
152 	struct switch_stack *sw = (struct switch_stack *)regs - 1;  in restore_sigcontext()  local
153 	long i, err = __get_user(regs->pc, &sc->sc_pc);  in restore_sigcontext()
155 	current->restart_block.fn = do_no_restart_syscall;  in restore_sigcontext()
157 	sw->r26 = (unsigned long) ret_from_sys_call;  in restore_sigcontext()
159 	err |= __get_user(regs->r0, sc->sc_regs+0);  in restore_sigcontext()
160 	err |= __get_user(regs->r1, sc->sc_regs+1);  in restore_sigcontext()
161 	err |= __get_user(regs->r2, sc->sc_regs+2);  in restore_sigcontext()
162 	err |= __get_user(regs->r3, sc->sc_regs+3);  in restore_sigcontext()
163 	err |= __get_user(regs->r4, sc->sc_regs+4);  in restore_sigcontext()
164 	err |= __get_user(regs->r5, sc->sc_regs+5);  in restore_sigcontext()
165 	err |= __get_user(regs->r6, sc->sc_regs+6);  in restore_sigcontext()
166 	err |= __get_user(regs->r7, sc->sc_regs+7);  in restore_sigcontext()
167 	err |= __get_user(regs->r8, sc->sc_regs+8);  in restore_sigcontext()
168 	err |= __get_user(sw->r9, sc->sc_regs+9);  in restore_sigcontext()
169 	err |= __get_user(sw->r10, sc->sc_regs+10);  in restore_sigcontext()
170 	err |= __get_user(sw->r11, sc->sc_regs+11);  in restore_sigcontext()
171 	err |= __get_user(sw->r12, sc->sc_regs+12);  in restore_sigcontext()
172 	err |= __get_user(sw->r13, sc->sc_regs+13);  in restore_sigcontext()
173 	err |= __get_user(sw->r14, sc->sc_regs+14);  in restore_sigcontext()
174 	err |= __get_user(sw->r15, sc->sc_regs+15);  in restore_sigcontext()
175 	err |= __get_user(regs->r16, sc->sc_regs+16);  in restore_sigcontext()
176 	err |= __get_user(regs->r17, sc->sc_regs+17);  in restore_sigcontext()
177 	err |= __get_user(regs->r18, sc->sc_regs+18);  in restore_sigcontext()
178 	err |= __get_user(regs->r19, sc->sc_regs+19);  in restore_sigcontext()
179 	err |= __get_user(regs->r20, sc->sc_regs+20);  in restore_sigcontext()
180 	err |= __get_user(regs->r21, sc->sc_regs+21);  in restore_sigcontext()
181 	err |= __get_user(regs->r22, sc->sc_regs+22);  in restore_sigcontext()
182 	err |= __get_user(regs->r23, sc->sc_regs+23);  in restore_sigcontext()
183 	err |= __get_user(regs->r24, sc->sc_regs+24);  in restore_sigcontext()
184 	err |= __get_user(regs->r25, sc->sc_regs+25);  in restore_sigcontext()
185 	err |= __get_user(regs->r26, sc->sc_regs+26);  in restore_sigcontext()
186 	err |= __get_user(regs->r27, sc->sc_regs+27);  in restore_sigcontext()
187 	err |= __get_user(regs->r28, sc->sc_regs+28);  in restore_sigcontext()
188 	err |= __get_user(regs->gp, sc->sc_regs+29);  in restore_sigcontext()
189 	err |= __get_user(usp, sc->sc_regs+30);  in restore_sigcontext()
193 		err |= __get_user(sw->fp[i], sc->sc_fpregs+i);  in restore_sigcontext()
194 	err |= __get_user(sw->fp[31], &sc->sc_fpcr);  in restore_sigcontext()
212 	if (__get_user(set.sig[0], &sc->sc_mask))  in do_sigreturn()
220 	/* Send SIGTRAP if we're single-stepping: */  in do_sigreturn()
222 		send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc,  in do_sigreturn()
238 	if (!access_ok(&frame->uc, sizeof(frame->uc)))  in do_rt_sigreturn()
240 	if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))  in do_rt_sigreturn()
245 	if (restore_sigcontext(&frame->uc.uc_mcontext, regs))  in do_rt_sigreturn()
248 	/* Send SIGTRAP if we're single-stepping: */  in do_rt_sigreturn()
250 		send_sig_fault(SIGTRAP, TRAP_BRKPT, (void __user *) regs->pc,  in do_rt_sigreturn()
267 	return (void __user *)((sigsp(sp, ksig) - frame_size) & -32ul);  in get_sigframe()
274 	struct switch_stack *sw = (struct switch_stack *)regs - 1;  in setup_sigcontext()  local
277 	err |= __put_user(on_sig_stack((unsigned long)sc), &sc->sc_onstack);  in setup_sigcontext()
278 	err |= __put_user(mask, &sc->sc_mask);  in setup_sigcontext()
279 	err |= __put_user(regs->pc, &sc->sc_pc);  in setup_sigcontext()
280 	err |= __put_user(8, &sc->sc_ps);  in setup_sigcontext()
282 	err |= __put_user(regs->r0 , sc->sc_regs+0);  in setup_sigcontext()
283 	err |= __put_user(regs->r1 , sc->sc_regs+1);  in setup_sigcontext()
284 	err |= __put_user(regs->r2 , sc->sc_regs+2);  in setup_sigcontext()
285 	err |= __put_user(regs->r3 , sc->sc_regs+3);  in setup_sigcontext()
286 	err |= __put_user(regs->r4 , sc->sc_regs+4);  in setup_sigcontext()
287 	err |= __put_user(regs->r5 , sc->sc_regs+5);  in setup_sigcontext()
288 	err |= __put_user(regs->r6 , sc->sc_regs+6);  in setup_sigcontext()
289 	err |= __put_user(regs->r7 , sc->sc_regs+7);  in setup_sigcontext()
290 	err |= __put_user(regs->r8 , sc->sc_regs+8);  in setup_sigcontext()
291 	err |= __put_user(sw->r9   , sc->sc_regs+9);  in setup_sigcontext()
292 	err |= __put_user(sw->r10  , sc->sc_regs+10);  in setup_sigcontext()
293 	err |= __put_user(sw->r11  , sc->sc_regs+11);  in setup_sigcontext()
294 	err |= __put_user(sw->r12  , sc->sc_regs+12);  in setup_sigcontext()
295 	err |= __put_user(sw->r13  , sc->sc_regs+13);  in setup_sigcontext()
296 	err |= __put_user(sw->r14  , sc->sc_regs+14);  in setup_sigcontext()
297 	err |= __put_user(sw->r15  , sc->sc_regs+15);  in setup_sigcontext()
298 	err |= __put_user(regs->r16, sc->sc_regs+16);  in setup_sigcontext()
299 	err |= __put_user(regs->r17, sc->sc_regs+17);  in setup_sigcontext()
300 	err |= __put_user(regs->r18, sc->sc_regs+18);  in setup_sigcontext()
301 	err |= __put_user(regs->r19, sc->sc_regs+19);  in setup_sigcontext()
302 	err |= __put_user(regs->r20, sc->sc_regs+20);  in setup_sigcontext()
303 	err |= __put_user(regs->r21, sc->sc_regs+21);  in setup_sigcontext()
304 	err |= __put_user(regs->r22, sc->sc_regs+22);  in setup_sigcontext()
305 	err |= __put_user(regs->r23, sc->sc_regs+23);  in setup_sigcontext()
306 	err |= __put_user(regs->r24, sc->sc_regs+24);  in setup_sigcontext()
307 	err |= __put_user(regs->r25, sc->sc_regs+25);  in setup_sigcontext()
308 	err |= __put_user(regs->r26, sc->sc_regs+26);  in setup_sigcontext()
309 	err |= __put_user(regs->r27, sc->sc_regs+27);  in setup_sigcontext()
310 	err |= __put_user(regs->r28, sc->sc_regs+28);  in setup_sigcontext()
311 	err |= __put_user(regs->gp , sc->sc_regs+29);  in setup_sigcontext()
312 	err |= __put_user(sp, sc->sc_regs+30);  in setup_sigcontext()
313 	err |= __put_user(0, sc->sc_regs+31);  in setup_sigcontext()
316 		err |= __put_user(sw->fp[i], sc->sc_fpregs+i);  in setup_sigcontext()
317 	err |= __put_user(0, sc->sc_fpregs+31);  in setup_sigcontext()
318 	err |= __put_user(sw->fp[31], &sc->sc_fpcr);  in setup_sigcontext()
320 	err |= __put_user(regs->trap_a0, &sc->sc_traparg_a0);  in setup_sigcontext()
321 	err |= __put_user(regs->trap_a1, &sc->sc_traparg_a1);  in setup_sigcontext()
322 	err |= __put_user(regs->trap_a2, &sc->sc_traparg_a2);  in setup_sigcontext()
336 		return -EFAULT;  in setup_frame()
338 	err |= setup_sigcontext(&frame->sc, regs, set->sig[0], oldsp);  in setup_frame()
340 		return -EFAULT;  in setup_frame()
344 	r26 = (unsigned long) ksig->ka.ka_restorer;  in setup_frame()
346 		err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);  in setup_frame()
347 		err |= __put_user(INSN_LDI_R0+__NR_sigreturn, frame->retcode+1);  in setup_frame()
348 		err |= __put_user(INSN_CALLSYS, frame->retcode+2);  in setup_frame()
350 		r26 = (unsigned long) frame->retcode;  in setup_frame()
358 	regs->r26 = r26;  in setup_frame()
359 	regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;  in setup_frame()
360 	regs->r16 = ksig->sig;			/* a0: signal number */  in setup_frame()
361 	regs->r17 = 0;				/* a1: exception code */  in setup_frame()
362 	regs->r18 = (unsigned long) &frame->sc;	/* a2: sigcontext pointer */  in setup_frame()
367 		current->comm, current->pid, frame, regs->pc, regs->r26);  in setup_frame()
381 		return -EFAULT;  in setup_rt_frame()
383 	err |= copy_siginfo_to_user(&frame->info, &ksig->info);  in setup_rt_frame()
386 	err |= __put_user(0, &frame->uc.uc_flags);  in setup_rt_frame()
387 	err |= __put_user(0, &frame->uc.uc_link);  in setup_rt_frame()
388 	err |= __put_user(set->sig[0], &frame->uc.uc_osf_sigmask);  in setup_rt_frame()
389 	err |= __save_altstack(&frame->uc.uc_stack, oldsp);  in setup_rt_frame()
390 	err |= setup_sigcontext(&frame->uc.uc_mcontext, regs,   in setup_rt_frame()
391 				set->sig[0], oldsp);  in setup_rt_frame()
392 	err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));  in setup_rt_frame()
394 		return -EFAULT;  in setup_rt_frame()
398 	r26 = (unsigned long) ksig->ka.ka_restorer;  in setup_rt_frame()
400 		err |= __put_user(INSN_MOV_R30_R16, frame->retcode+0);  in setup_rt_frame()
402 				  frame->retcode+1);  in setup_rt_frame()
403 		err |= __put_user(INSN_CALLSYS, frame->retcode+2);  in setup_rt_frame()
405 		r26 = (unsigned long) frame->retcode;  in setup_rt_frame()
409 		return -EFAULT;  in setup_rt_frame()
412 	regs->r26 = r26;  in setup_rt_frame()
413 	regs->r27 = regs->pc = (unsigned long) ksig->ka.sa.sa_handler;  in setup_rt_frame()
414 	regs->r16 = ksig->sig;			  /* a0: signal number */  in setup_rt_frame()
415 	regs->r17 = (unsigned long) &frame->info; /* a1: siginfo pointer */  in setup_rt_frame()
416 	regs->r18 = (unsigned long) &frame->uc;	  /* a2: ucontext pointer */  in setup_rt_frame()
421 		current->comm, current->pid, frame, regs->pc, regs->r26);  in setup_rt_frame()
437 	if (ksig->ka.sa.sa_flags & SA_SIGINFO)  in handle_signal()
449 	switch (regs->r0) {  in syscall_restart()
451 		if (!(ka->sa.sa_flags & SA_RESTART)) {  in syscall_restart()
453 			regs->r0 = EINTR;  in syscall_restart()
458 		regs->r0 = r0;	/* reset v0 and a3 and replay syscall */  in syscall_restart()
459 		regs->r19 = r19;  in syscall_restart()
460 		regs->pc -= 4;  in syscall_restart()
463 		regs->r0 = EINTR;  in syscall_restart()
475  * the kernel can handle, and then we build all the user-level signal handling
476  * stack-frames in one go after that.
490 		/* ... so re-check the single stepping. */  in do_signal()
499 			switch (regs->r0) {  in do_signal()
503 				/* Reset v0 and a3 and replay syscall.  */  in do_signal()
504 				regs->r0 = r0;  in do_signal()
505 				regs->r19 = r19;  in do_signal()
506 				regs->pc -= 4;  in do_signal()
510 				regs->r0 = __NR_restart_syscall;  in do_signal()
511 				regs->pc -= 4;  in do_signal()
518 		ptrace_set_bpt(current);	/* re-set breakpoint */  in do_signal()