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serial Kernel panic

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xamidev
2026-01-10 09:45:20 +01:00
parent 0f72987bc1
commit 12ab12f1b2
7 changed files with 119 additions and 2 deletions
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35
src/idt/idt.c
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@@ -53,6 +53,38 @@ void idt_init()
DEBUG("IDT initialized");
}
static inline uint64_t read_cr2(void)
{
uint64_t val;
asm volatile ("mov %%cr2, %0" : "=r"(val));
return val;
}
static void page_fault_handler(struct cpu_status_t* ctx)
{
// It could be used to remap pages etc. to fix the fault, but right now what I'm more
// interested in is getting more info out of those numbers cause i'm lost each time i have
// to read all this mess
uint64_t cr2 = read_cr2();
DEBUG("\x1b[38;5;231mPage Fault at rip=0x%p, err=%u (%s%s%s%s%s%s%s%s) when accessing addr=0x%p\x1b[0m", ctx->iret_rip, ctx->error_code,
CHECK_BIT(ctx->error_code, 0) ? "PAGE_PROTECTION_VIOLATION " : "PAGE_NOT_PRESENT ",
CHECK_BIT(ctx->error_code, 1) ? "ON_WRITE " : "ON_READ ",
CHECK_BIT(ctx->error_code, 2) ? "IN_USER_MODE" : "IN_KERNEL_MODE",
CHECK_BIT(ctx->error_code, 3) ? " WAS_RESERVED" : "",
CHECK_BIT(ctx->error_code, 4) ? " ON_INSTRUCTION_FETCH" : "",
CHECK_BIT(ctx->error_code, 5) ? " PK_VIOLATION" : "",
CHECK_BIT(ctx->error_code, 6) ? " ON_SHADOWSTACK_ACCESS" : "",
CHECK_BIT(ctx->error_code, 7) ? " SGX_VIOLATION" : "",
cr2);
/* if (CHECK_BIT(ctx->error_code, 0))
{
panic(ctx);
} */
panic(ctx);
}
struct cpu_status_t* interrupt_dispatch(struct cpu_status_t* context)
{
switch(context->vector_number)
@@ -100,7 +132,8 @@ struct cpu_status_t* interrupt_dispatch(struct cpu_status_t* context)
DEBUG("General Protection Fault!");
break;
case 14:
DEBUG("Page Fault!");
// Better debugging for page faults...
page_fault_handler(context);
break;
case 15:
DEBUG("Intel Reserved Interrupt! (Achievement unlocked: How Did We Get Here?)");