kernel: implement dev zero and null

1 files changed, 13 insertions, 4 deletions

diff --git a/kernel/kapi/devices/error.cpp b/kernel/kapi/devices/error.cpp
index 9d814fbe..40320551 100644
--- a/kernel/kapi/devices/error.cpp
+++ b/kernel/kapi/devices/error.cpp
@@ -3,7 +3,6 @@
 #include <kstd/system_error.hpp>
 
 #include <string_view>
-#include <utility>
 
 namespace kapi::devices
 {
@@ -23,6 +22,10 @@ namespace kapi::devices
         {
           case driver_match_errc::no_match:
             return "driver does not match this device";
+          case driver_match_errc::no_device_signature:
+            return "missing device signature";
+          case driver_match_errc::invalid_device_signature:
+            return "device signature is invalid";
           default:
             return "unknown driver matching error";
         }
@@ -30,11 +33,17 @@ namespace kapi::devices
 
       [[nodiscard]] auto default_error_condition(int value) const noexcept -> kstd::error_condition override
       {
-        if (value == std::to_underlying(driver_match_errc::no_match))
+        switch (static_cast<driver_match_errc>(value))
         {
-          return make_error_condition(kstd::errc::not_supported);
+          case driver_match_errc::no_match:
+          case driver_match_errc::no_device_signature:
+            return make_error_condition(kstd::errc::not_supported);
+            break;
+          case driver_match_errc::invalid_device_signature:
+            return make_error_condition(kstd::errc::invalid_argument);
+          default:
+            return kstd::error_category::default_error_condition(value);
         }
-        return kstd::error_category::default_error_condition(value);
       }
 
     } constexpr driver_match_category_instance{};