1 // SPDX-License-Identifier: GPL-2.0
50 	printk(KERN_ALERT "tsk->{mm,active_mm}->context = %08lx\n",  in unhandled_fault()
51 		(tsk->mm ? tsk->mm->context : tsk->active_mm->context));  in unhandled_fault()
52 	printk(KERN_ALERT "tsk->{mm,active_mm}->pgd = %08lx\n",  in unhandled_fault()
53 		(tsk->mm ? (unsigned long) tsk->mm->pgd :  in unhandled_fault()
54 			(unsigned long) tsk->active_mm->pgd));  in unhandled_fault()
70 	       tsk->comm, task_pid_nr(tsk), address,  in show_signal_msg()
71 	       (void *)regs->pc, (void *)regs->u_regs[UREG_I7],  in show_signal_msg()
72 	       (void *)regs->u_regs[UREG_FP], code);  in show_signal_msg()
74 	print_vma_addr(KERN_CONT " in ", regs->pc);  in show_signal_msg()
94 		return regs->pc;  in compute_si_addr()
96 	if (regs->psr & PSR_PS)  in compute_si_addr()
97 		insn = *(unsigned int *) regs->pc;  in compute_si_addr()
99 		__get_user(insn, (unsigned int *) regs->pc);  in compute_si_addr()
112 asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,  in do_sparc_fault()  argument
117 	struct mm_struct *mm = tsk->mm;  in do_sparc_fault()
118 	int from_user = !(regs->psr & PSR_PS);  in do_sparc_fault()
124 		address = regs->pc;  in do_sparc_fault()
127 	 * We fault-in kernel-space virtual memory on-demand. The  in do_sparc_fault()
140 	 * If we're in an interrupt or have no user  in do_sparc_fault()
157 	if (vma->vm_start <= address)  in do_sparc_fault()
159 	if (!(vma->vm_flags & VM_GROWSDOWN))  in do_sparc_fault()
169 	if (write) {  in do_sparc_fault()
170 		if (!(vma->vm_flags & VM_WRITE))  in do_sparc_fault()
173 		/* Allow reads even for write-only mappings */  in do_sparc_fault()
174 		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))  in do_sparc_fault()
180 	if (write)  in do_sparc_fault()
210 		/* No need to mmap_read_unlock(mm) as we would  in do_sparc_fault()
240 		entry = search_exception_tables(regs->pc);  in do_sparc_fault()
242 		printk("Exception: PC<%08lx> faddr<%08lx>\n",  in do_sparc_fault()
243 		       regs->pc, address);  in do_sparc_fault()
245 			regs->pc, entry->fixup);  in do_sparc_fault()
247 		regs->pc = entry->fixup;  in do_sparc_fault()
248 		regs->npc = regs->pc + 4;  in do_sparc_fault()
275 		 * Synchronize this task's top level page-table  in do_sparc_fault()
284 		pgd = tsk->active_mm->pgd + offset;  in do_sparc_fault()
311 static void force_user_fault(unsigned long address, int write)  in force_user_fault()  argument
315 	struct mm_struct *mm = tsk->mm;  in force_user_fault()
325 	if (vma->vm_start <= address)  in force_user_fault()
327 	if (!(vma->vm_flags & VM_GROWSDOWN))  in force_user_fault()
333 	if (write) {  in force_user_fault()
334 		if (!(vma->vm_flags & VM_WRITE))  in force_user_fault()
338 		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))  in force_user_fault()
350 	__do_fault_siginfo(code, SIGSEGV, tsk->thread.kregs, address);  in force_user_fault()
355 	__do_fault_siginfo(BUS_ADRERR, SIGBUS, tsk->thread.kregs, address);  in force_user_fault()
368 	sp = current_thread_info()->rwbuf_stkptrs[0];  in window_overflow_fault()
389 	sp = regs->u_regs[UREG_FP];  in window_ret_fault()