sh/mm/fault.c

28 force_sig_info_fault(int si_signo, int si_code, unsigned long address)
30 	force_sig_fault(si_signo, si_code, (void __user *)address);
120 static inline pmd_t *vmalloc_sync_one(pgd_t *pgd, unsigned long address)
122 	unsigned index = pgd_index(address);
134 	p4d = p4d_offset(pgd, address);
135 	p4d_k = p4d_offset(pgd_k, address);
139 	pud = pud_offset(p4d, address);
140 	pud_k = pud_offset(p4d_k, address);
147 	pmd = pmd_offset(pud, address);
148 	pmd_k = pmd_offset(pud_k, address);
176 static noinline int vmalloc_fault(unsigned long address)
183 	if (!(address >= VMALLOC_START && address < __FAULT_ADDR_LIMIT))
194 	pmd_k = vmalloc_sync_one(pgd_k, address);
198 	pte_k = pte_offset_kernel(pmd_k, address);
206 show_fault_oops(struct pt_regs *regs, unsigned long address)
212 		 address < PAGE_SIZE ? "NULL pointer dereference"
214 		 address);
218 	show_pte(NULL, address);
223 	   unsigned long address)
229 	if (handle_trapped_io(regs, address))
238 	show_fault_oops(regs, address);
245 		       unsigned long address, int si_code)
254 		force_sig_info_fault(SIGSEGV, si_code, address);
259 	no_context(regs, error_code, address);
264 		     unsigned long address)
266 	__bad_area_nosemaphore(regs, error_code, address, SEGV_MAPERR);
271 	   unsigned long address, int si_code)
281 	__bad_area_nosemaphore(regs, error_code, address, si_code);
285 bad_area(struct pt_regs *regs, unsigned long error_code, unsigned long address)
287 	__bad_area(regs, error_code, address, SEGV_MAPERR);
292 		      unsigned long address)
294 	__bad_area(regs, error_code, address, SEGV_ACCERR);
298 do_sigbus(struct pt_regs *regs, unsigned long error_code, unsigned long address)
307 		no_context(regs, error_code, address);
309 	force_sig_info_fault(SIGBUS, BUS_ADRERR, address);
314 	       unsigned long address, vm_fault_t fault)
322 			no_context(regs, error_code, address);
336 			no_context(regs, error_code, address);
348 			do_sigbus(regs, error_code, address);
350 			bad_area(regs, error_code, address);
379 static int fault_in_kernel_space(unsigned long address)
381 	return address >= TASK_SIZE;
385  * This routine handles page faults.  It determines the address,
391 					unsigned long address)
413 	if (unlikely(fault_in_kernel_space(address))) {
414 		if (vmalloc_fault(address) >= 0)
419 		bad_area_nosemaphore(regs, error_code, address);
430 	perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
437 		bad_area_nosemaphore(regs, error_code, address);
442 	vma = lock_mm_and_find_vma(mm, address, regs);
444 		bad_area_nosemaphore(regs, error_code, address);
453 		bad_area_access_error(regs, error_code, address);
469 	fault = handle_mm_fault(vma, address, flags, regs);
472 		if (mm_fault_error(regs, error_code, address, fault))