arch/riscv64/arch_int.cpp

166 static void WriteRegisters(iframe* frame)
168 	uint64* regs = &frame->ra;
208 WriteTrapInfo(iframe* frame)
211 	dprintf("STrap("); WriteCause(frame->cause); dprintf(")\n");
212 	dprintf("  sstatus: "); WriteSstatus(frame->status); dprintf("\n");
216 	dprintf("  stval: 0x%" B_PRIx64 "\n", frame->tval);
220 	WriteRegisters(frame);
243 //			DumpMemory((uint64*)frame->sp, thread_get_current_thread()->kernel_stack_top - frame->sp);
353 STrap(iframe* frame)
358 	iframe oldFrame = *frame;
364 				uint64 newVal = ((int64*)frame)[i];
374 			if (frame->epc == 0)
378 	switch (frame->cause) {
382 			if (SetAccessedFlags(Stval(), frame->cause == causeStorePageFault))
387 	if (SstatusReg{.val = frame->status}.spp == modeU) {
388 		thread_get_current_thread()->arch_info.userFrame = frame;
389 		thread_get_current_thread()->arch_info.oldA0 = frame->a0;
393 		if (SstatusReg{.val = frame->status}.spp == modeU) {
409 				frame->a0 = thread_get_current_thread()->arch_info.oldA0;
410 				frame->epc -= 4;
416 	switch (frame->cause) {
419 				frame->epc);
428 			if (SstatusReg{.val = frame->status}.spp == modeU) {
451 						debug_set_page_fault_info(stval, frame->epc,
452 							(frame->cause == causeStorePageFault)
454 						frame->epc = cpu->fault_handler;
455 						frame->sp = cpu->fault_handler_stack_pointer;
462 						debug_set_page_fault_info(stval, frame->epc,
463 							frame->cause == causeStorePageFault
465 						frame->epc = (addr_t)thread->fault_handler;
471 					"address %p from ip %p\n", (void*)stval, (void*)frame->epc);
475 			if (SstatusReg{.val = frame->status}.pie == 0) {
480 					if (frame->epc != handler) {
481 						frame->epc = handler;
491 			vm_page_fault(stval, frame->epc, frame->cause == causeStorePageFault,
492 				frame->cause == causeExecPageFault,
493 				SstatusReg{.val = frame->status}.spp == modeU, &newIP);
496 				frame->epc = newIP;
522 			frame->epc += 4; // skip ecall
523 			uint64 syscall = frame->t0;
527 				memcpy(&args[0], &frame->a0,
530 					if (status_t res = user_memcpy(&args[8], (void*)frame->sp,
534 						frame->a0 = res;
552 			frame->a0 = returnValue;