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[Zion] Add a way to unwind the stack and recover from user-space faults.

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Drew Galbraith 2023-11-22 18:25:08 -08:00
parent 8ceab2ad23
commit 941d7c8d59
6 changed files with 63 additions and 0 deletions
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32
zion/interrupt/interrupt.cpp
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@ -3,6 +3,7 @@
#include <stdint.h>
#include "common/port.h"
#include "common/stack_unwind.h"
#include "debug/debug.h"
#include "interrupt/apic.h"
#include "interrupt/apic_timer.h"
@ -69,15 +70,29 @@ struct InterruptFrame {
uint64_t ss;
};
bool IsUserSpace(uint64_t addr) { return (addr & (1l << 63)) == 0; }
extern "C" void isr_divide_by_zero();
extern "C" void interrupt_divide_by_zero(InterruptFrame* frame) {
dbgln("RIP: {x}", frame->rip);
StackUnwind(frame->rbp);
if (IsUserSpace(frame->rip)) {
gScheduler->CurrentProcess().Exit();
UNREACHABLE
}
panic("DIV0");
}
extern "C" void isr_invalid_opcode();
extern "C" void interrupt_invalid_opcode(InterruptFrame* frame) {
dbgln("RIP: {x}", frame->rip);
StackUnwind(frame->rbp);
if (IsUserSpace(frame->rip)) {
gScheduler->CurrentProcess().Exit();
UNREACHABLE
}
panic("INVALID OPCODE");
}
@ -96,7 +111,12 @@ extern "C" void interrupt_protection_fault(InterruptFrame* frame) {
dbgln("Index: {}", err >> 3);
dbgln("RIP: {x}", frame->rip);
dbgln("RSP: {x}", frame->rsp);
StackUnwind(frame->rbp);
if (IsUserSpace(frame->rip)) {
gScheduler->CurrentProcess().Exit();
UNREACHABLE
}
panic("GP");
}
@ -133,11 +153,23 @@ extern "C" void interrupt_page_fault(InterruptFrame* frame) {
dbgln("rip: {x}", frame->rip);
dbgln("addr: {x}", frame->cr2);
StackUnwind(frame->rbp);
if (IsUserSpace(frame->rip)) {
gScheduler->CurrentProcess().Exit();
UNREACHABLE
}
panic("PF");
}
extern "C" void isr_fpe_fault();
extern "C" void interrupt_fpe_fault(InterruptFrame* frame) {
dbgln("Floating point exception.");
if (IsUserSpace(frame->rip)) {
gScheduler->CurrentProcess().Exit();
UNREACHABLE
}
panic("Floating point exception");
}