void x86_syscall_handler(struct x86_iframe *frame)
{
exception_die(frame, "unhandled syscall, halting\n");
}
void x86_unhandled_exception(struct x86_iframe *frame)
{
exception_die(frame, "unhandled exception, halting\n");
}
void x86_invop_handler(struct x86_iframe *frame)
{
exception_die(frame, "unhandled invalid op, halting\n");
}
void x86_gpf_handler(struct x86_iframe *frame)
{
exception_die(frame, "unhandled gpf, halting\n");
}
void x86_pfe_handler(struct x86_iframe *frame)
{
/* Handle a page fault exception */
uint32_t error_code;
thread_t *current_thread;
error_code = frame->err_code;
#ifdef PAGE_FAULT_DEBUG_INFO
addr_t v_addr, ssp, esp, ip, rip;
v_addr = x86_get_cr2();
ssp = frame->user_ss & X86_8BYTE_MASK;
esp = frame->user_esp;
ip = frame->cs & X86_8BYTE_MASK;
rip = frame->eip;
dprintf(CRITICAL, "<PAGE FAULT> Instruction Pointer = 0x%x:0x%x\n",
(unsigned int)ip,
(unsigned int)rip);
dprintf(CRITICAL, "<PAGE FAULT> Stack Pointer = 0x%x:0x%x\n",
(unsigned int)ssp,
(unsigned int)esp);
dprintf(CRITICAL, "<PAGE FAULT> Fault Linear Address = 0x%x\n",
(unsigned int)v_addr);
dprintf(CRITICAL, "<PAGE FAULT> Error Code Value = 0x%x\n",
error_code);
dprintf(CRITICAL, "<PAGE FAULT> Error Code Type = %s %s %s%s, %s\n",
error_code & PFEX_U ? "user" : "supervisor",
error_code & PFEX_W ? "write" : "read",
error_code & PFEX_I ? "instruction" : "data",
error_code & PFEX_RSV ? " rsv" : "",
error_code & PFEX_P ? "protection violation" : "page not present");
#endif
current_thread = get_current_thread();
dump_thread(current_thread);
if (error_code & PFEX_U) {
// User mode page fault
switch (error_code) {
case 4:
case 5:
case 6:
case 7:
#ifdef PAGE_FAULT_DEBUG_INFO
thread_detach(current_thread);
#else
thread_exit(current_thread->retcode);
#endif
break;
}
} else {
// Supervisor mode page fault
switch (error_code) {
case 0:
case 1:
case 2:
case 3:
exception_die(frame, "Page Fault exception, halting\n");
break;
}
}
}
void arm_syscall_handler(struct arm_fault_frame *frame)
{
exception_die(frame, "unhandled syscall, halting\n");
}
