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()
58 asmlinkage int lookup_fault(unsigned long pc, unsigned long ret_pc,  in lookup_fault()  argument
75 		insn = *((unsigned int *) pc);  in lookup_fault()
83 		insn = *((unsigned int *) pc);  in lookup_fault()
93 	regs.pc = pc;  in lookup_fault()
94 	regs.npc = pc + 4;  in lookup_fault()
118 	       tsk->comm, task_pid_nr(tsk), address,  in show_signal_msg()
119 	       (void *)regs->pc, (void *)regs->u_regs[UREG_I7],  in show_signal_msg()
120 	       (void *)regs->u_regs[UREG_FP], code);  in show_signal_msg()
122 	print_vma_addr(KERN_CONT " in ", regs->pc);  in show_signal_msg()
142 		return regs->pc;  in compute_si_addr()
144 	if (regs->psr & PSR_PS)  in compute_si_addr()
145 		insn = *(unsigned int *) regs->pc;  in compute_si_addr()
147 		__get_user(insn, (unsigned int *) regs->pc);  in compute_si_addr()
160 asmlinkage void do_sparc_fault(struct pt_regs *regs, int text_fault, int write,  in do_sparc_fault()  argument
165 	struct mm_struct *mm = tsk->mm;  in do_sparc_fault()
168 	int from_user = !(regs->psr & PSR_PS);  in do_sparc_fault()
174 		address = regs->pc;  in do_sparc_fault()
177 	 * We fault-in kernel-space virtual memory on-demand. The  in do_sparc_fault()
190 	 * If we're in an interrupt or have no user  in do_sparc_fault()
199 	down_read(&mm->mmap_sem);  in do_sparc_fault()
207 	if (vma->vm_start <= address)  in do_sparc_fault()
209 	if (!(vma->vm_flags & VM_GROWSDOWN))  in do_sparc_fault()
219 	if (write) {  in do_sparc_fault()
220 		if (!(vma->vm_flags & VM_WRITE))  in do_sparc_fault()
223 		/* Allow reads even for write-only mappings */  in do_sparc_fault()
224 		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))  in do_sparc_fault()
230 	if (write)  in do_sparc_fault()
255 			current->maj_flt++;  in do_sparc_fault()
259 			current->min_flt++;  in do_sparc_fault()
267 			/* No need to up_read(&mm->mmap_sem) as we would  in do_sparc_fault()
276 	up_read(&mm->mmap_sem);  in do_sparc_fault()
284 	up_read(&mm->mmap_sem);  in do_sparc_fault()
295 	g2 = regs->u_regs[UREG_G2];  in do_sparc_fault()
297 		fixup = search_extables_range(regs->pc, &g2);  in do_sparc_fault()
306 			printk("Exception: PC<%08lx> faddr<%08lx>\n",  in do_sparc_fault()
307 			       regs->pc, address);  in do_sparc_fault()
309 				regs->pc, fixup, g2);  in do_sparc_fault()
311 			if ((regs->pc >= (unsigned long)__memset_start &&  in do_sparc_fault()
312 			     regs->pc < (unsigned long)__memset_end) ||  in do_sparc_fault()
313 			    (regs->pc >= (unsigned long)__csum_partial_copy_start &&  in do_sparc_fault()
314 			     regs->pc < (unsigned long)__csum_partial_copy_end)) {  in do_sparc_fault()
315 				regs->u_regs[UREG_I4] = address;  in do_sparc_fault()
316 				regs->u_regs[UREG_I5] = regs->pc;  in do_sparc_fault()
318 			regs->u_regs[UREG_G2] = g2;  in do_sparc_fault()
319 			regs->pc = fixup;  in do_sparc_fault()
320 			regs->npc = regs->pc + 4;  in do_sparc_fault()
333 	up_read(&mm->mmap_sem);  in do_sparc_fault()
341 	up_read(&mm->mmap_sem);  in do_sparc_fault()
349 		 * Synchronize this task's top level page-table  in do_sparc_fault()
356 		pgd = tsk->active_mm->pgd + offset;  in do_sparc_fault()
378 static void force_user_fault(unsigned long address, int write)  in force_user_fault()  argument
382 	struct mm_struct *mm = tsk->mm;  in force_user_fault()
388 	down_read(&mm->mmap_sem);  in force_user_fault()
392 	if (vma->vm_start <= address)  in force_user_fault()
394 	if (!(vma->vm_flags & VM_GROWSDOWN))  in force_user_fault()
400 	if (write) {  in force_user_fault()
401 		if (!(vma->vm_flags & VM_WRITE))  in force_user_fault()
405 		if (!(vma->vm_flags & (VM_READ | VM_EXEC)))  in force_user_fault()
413 	up_read(&mm->mmap_sem);  in force_user_fault()
416 	up_read(&mm->mmap_sem);  in force_user_fault()
417 	__do_fault_siginfo(code, SIGSEGV, tsk->thread.kregs, address);  in force_user_fault()
421 	up_read(&mm->mmap_sem);  in force_user_fault()
422 	__do_fault_siginfo(BUS_ADRERR, SIGBUS, tsk->thread.kregs, address);  in force_user_fault()
435 	sp = current_thread_info()->rwbuf_stkptrs[0];  in window_overflow_fault()
456 	sp = regs->u_regs[UREG_FP];  in window_ret_fault()