/**
@brief Page fault handler
*/
asmregparm void do_page_fault(struct pt_regs * regs, long error_code)
{
unsigned long error_address = read_cr2();
bool in_user = address_in_user(error_address);
struct ko_thread *current;
//printk("PAGE fault: eip %x addr %x code %x\n", regs->ip, error_address, error_code);
/*
Access violation.
读、写和u/s异常
如果是用户模式，那么访问核心层空间时崩溃，其他地方尝试修复
如果是特权模式，都尝试修复
*/
if (error_code & PAGE_FAULT_U)
{
if (in_user == false)
goto die_cur;
}
current = kt_current();
if (unlikely(false == ks_exception(current, error_address, error_code)))
goto die_cur;
return;
die_cur:
printk("TODO: Thread deing :eip %x addr %x code %x\n", regs->ip, error_address, error_code);
//TODO kill thread
//fak_arch_x86_dump_register(regs);
kt_delete_current();
}
static bool recover(unsigned long address, int write, int present)
{
unsigned long core_error_code = 0;
if (write)
core_error_code |= PAGE_FAULT_W;
if (present)
core_error_code |= PAGE_FAULT_P;
/* Call the exception handler of section */
return ks_exception(kt_current(), address, core_error_code);
}
