From aa68f53d2502e0ea81c8e9c95e37d9847cb6cb16 Mon Sep 17 00:00:00 2001
From: Felix Morgner <felix.morgner@ost.ch>
Date: Thu, 26 Mar 2026 17:15:26 +0100
Subject: arch/cpu: fix interrupt dispatch

---
 arch/x86_64/src/cpu/interrupts.cpp | 34 +++++++++++++++++++++-------------
 1 file changed, 21 insertions(+), 13 deletions(-)

(limited to 'arch')

diff --git a/arch/x86_64/src/cpu/interrupts.cpp b/arch/x86_64/src/cpu/interrupts.cpp
index 2f23f07..907f289 100644
--- a/arch/x86_64/src/cpu/interrupts.cpp
+++ b/arch/x86_64/src/cpu/interrupts.cpp
@@ -134,25 +134,33 @@ namespace arch::cpu
     {
       auto [number, code] = frame->interrupt;
 
-      if (number < number_of_exception_vectors && !dispatch_exception(frame))
+      if (number < number_of_exception_vectors)
       {
-        if (has_error_code(static_cast<exception>(number)))
+        if (!dispatch_exception(frame))
         {
-          kstd::println(kstd::print_sink::stderr,
-                        "[x86_64:CPU] Unhandled exception number {:#04x} received with code {:#04x}", number, code);
-        }
-        else
-        {
-          kstd::println(kstd::print_sink::stderr, "[x86_64:CPU] Unhandled exception number {:#04x} received", number);
+          if (has_error_code(static_cast<exception>(number)))
+          {
+            kstd::println(kstd::print_sink::stderr,
+                          "[x86_64:CPU] Unhandled exception number {:#04x} received with code {:#04x}", number, code);
+          }
+          else
+          {
+            kstd::println(kstd::print_sink::stderr, "[x86_64:CPU] Unhandled exception number {:#04x} received", number);
+          }
         }
       }
-      else if (number >= number_of_exception_vectors &&
-               kapi::interrupts::dispatch(number) == kapi::interrupts::status::unhandled)
+      else
       {
-        kstd::println(kstd::print_sink::stderr, "[x86_64:CPU] Unhandled interrupt {:#04x}", number);
-      }
+        auto irq_number = number - number_of_exception_vectors;
 
-      acknowledge_pic_interrupt(frame);
+        if (kapi::interrupts::dispatch(irq_number) == kapi::interrupts::status::unhandled)
+        {
+          kstd::println(kstd::print_sink::stderr, "[x86_64:CPU] Unhandled interrupt {:#04x} (IRQ{})", number,
+                        irq_number);
+        }
+
+        acknowledge_pic_interrupt(frame);
+      }
     }
   }
 
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