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Pass exception stack frame pointer to exception handler

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Show exception stack frame contents on exception
This commit is contained in:
Josh Holtrop 2023-11-01 21:22:54 -04:00
parent 01c73f8474
commit 2fa4193517
1 changed files with 24 additions and 3 deletions
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27
src/hulk/idt.d
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@ -9,9 +9,21 @@ import hulk.fb;
import hulk.console; import hulk.console;
import hulk.klog; import hulk.klog;
import hulk.apic; import hulk.apic;
import hulk.cpu;
struct Idt struct Idt
{ {
static struct ExceptionStackFrame
{
ulong rip;
ulong cs;
ulong rflags;
ulong rsp;
ulong ss;
}
public static enum ulong EXC_PAGE_FAULT = 14;
/* The I/O APIC is configured to map IRQ 0 to interrupt 64 (0x40). */ /* The I/O APIC is configured to map IRQ 0 to interrupt 64 (0x40). */
public static enum ulong INT_APIC_BASE = 0x40u; /* IRQ 0 */ public static enum ulong INT_APIC_BASE = 0x40u; /* IRQ 0 */
public static enum ulong INT_APIC_COUNT = 24u; public static enum ulong INT_APIC_COUNT = 24u;
@ -74,10 +86,13 @@ struct Idt
pushq %rdi pushq %rdi
pushq %rsi pushq %rsi
pushq %rax pushq %rax
pushq %rdx
mov $$", isr, ", %rdi mov $$", isr, ", %rdi
" ~ (isr_has_error_code(isr) ? "mov 0x18(%rsp), %rsi" : "") ~ " " ~ (isr_has_error_code(isr) ? "mov 0x20(%rsp), %rsi" : "") ~ "
" ~ (isr_has_error_code(isr) ? "lea 0x28(%rsp), %rdx" : "lea 0x20(%rsp), %rdx") ~ "
movabs $$isr, %rax movabs $$isr, %rax
callq *%rax callq *%rax
popq %rdx
popq %rax popq %rax
popq %rsi popq %rsi
popq %rdi popq %rdi
@ -102,7 +117,7 @@ struct Idt
} }
} }
public extern(C) void isr(ulong vector, ulong arg) public extern(C) void isr(ulong vector, ulong arg, Idt.ExceptionStackFrame * stack_frame)
{ {
if ((vector >= Idt.INT_APIC_BASE) && (vector < (Idt.INT_APIC_BASE + Idt.INT_APIC_COUNT))) if ((vector >= Idt.INT_APIC_BASE) && (vector < (Idt.INT_APIC_BASE + Idt.INT_APIC_COUNT)))
{ {
@ -122,7 +137,13 @@ public extern(C) void isr(ulong vector, ulong arg)
default: default:
Console.clear(); Console.clear();
Fb.clear(0xFF8000u); Fb.clear(0xFF8000u);
Klog.writefln("ISR %u, 0x%x", vector, arg); Klog.writefln("ISR %u, error code 0x%x", vector, arg);
Klog.writefln("RIP = 0x%p", stack_frame.rip);
Klog.writefln("CS = 0x%x", stack_frame.cs);
Klog.writefln("RFLAGS = 0x%x", stack_frame.rflags);
Klog.writefln("RSP = 0x%x", stack_frame.rsp);
Klog.writefln("SS = 0x%x", stack_frame.ss);
Klog.writefln("CR2 = 0x%p", read_cr2());
__asm("cli", ""); __asm("cli", "");
for (;;) for (;;)
{ {