add CatchAllDebugBucket as a syscall for debugging, add a basic network card plus ethernet driver (wip)

code/kernel/kmain.c

@@ -13,6 +13,7 @@
 #include <ke_irq.h>
 #include <ke_dpc.h>
 #include <ke_syscall.h>
+#include <ethernet.h>
 #include <ke_debug.h>
 #include <ke_util.h>
 #include <ldr_image.h>
@@ -401,10 +402,15 @@ void SystemInitThread(void* arg) {
     args->hal->Screen.Clear(0x000000);
 
     // Print memory status now that the system is fully alive
-    DbgPrint("Memory Status:\n");
-    DbgPrint("  -> Free (PMM):   %.2f MB\n", (float)MmFreeFrameCount() * PAGE_SIZE / (1024.0f * 1024.0f));
-    DbgPrint("  -> Kernel Pool:  %.2f MB\n", (float)MmGetKernelPoolUsage() / (1024.0f * 1024.0f));
-    DbgPrint("  -> User Heap:    %.2f MB\n", (float)MmGetUserHeapUsage() / (1024.0f * 1024.0f));
+    DbgPrint(
+        "Memory Status:\n"
+        "  -> Free (PMM):   %.2f MB\n"
+        "  -> Kernel Pool:  %.2f MB\n"
+        "  -> User Heap:    %.2f MB\n",
+        (float)MmFreeFrameCount() * PAGE_SIZE / (1024.0f * 1024.0f),
+        (float)MmGetKernelPoolUsage() / (1024.0f * 1024.0f),
+        (float)MmGetUserHeapUsage() / (1024.0f * 1024.0f)
+    );
 
     if (args->bootInfo->Debug & 2)
         KiRunKernelSelfTests(args->hal);
@@ -432,6 +438,59 @@ void SystemInitThread(void* arg) {
     MmFreePool(args);
 }
 
+// for debug! for science!
+uint64_t KeCatchAllDebugBucket(uint64_t a0, uint64_t a1, uint64_t a2, uint64_t a3, uint64_t a4, uint64_t a5) {
+    if (a0 == 0) {
+        DbgPrint(
+            "Memory Status:\n"
+            "  -> Free (PMM):   %.2f MB\n"
+            "  -> Kernel Pool:  %.2f MB\n"
+            "  -> User Heap:    %.2f MB\n",
+            (float)MmFreeFrameCount() * PAGE_SIZE / (1024.0f * 1024.0f),
+            (float)MmGetKernelPoolUsage() / (1024.0f * 1024.0f),
+            (float)MmGetUserHeapUsage() / (1024.0f * 1024.0f)
+        );
+        return 0;
+    }
+
+    if (a0 == 1) {
+        uint32_t deviceIndex = (uint32_t)a1;
+        uint32_t targetIp;
+
+        // Usage from shell debug mode:
+        //   1,0,10,0,2,2       ping 10.0.2.2 on eth0
+        //   1,0,167772674,0,0,0 ping packed IPv4 0x0A000202 on eth0
+        //   1,0,0,0,0,0        ping the default QEMU gateway 10.0.2.2
+        if (a2 == 0 && a3 == 0 && a4 == 0 && a5 == 0) {
+            targetIp = NET_IPV4_ADDR(10, 0, 2, 2);
+        } else if (a3 == 0 && a4 == 0 && a5 == 0 && a2 > 0xFFu) {
+            targetIp = (uint32_t)a2;
+        } else {
+            if (a2 > 0xFFu || a3 > 0xFFu || a4 > 0xFFu || a5 > 0xFFu) {
+                DbgPrint("DebugBucket[1]: invalid IPv4 octet(s): %llu.%llu.%llu.%llu\n",
+                         a2, a3, a4, a5);
+                return STATUS_INVALID_PARAMETER;
+            }
+            targetIp = NET_IPV4_ADDR((uint8_t)a2, (uint8_t)a3,
+                                     (uint8_t)a4, (uint8_t)a5);
+        }
+
+        DbgPrint("DebugBucket[1]: ping eth%u %u.%u.%u.%u\n",
+                 deviceIndex,
+                 (targetIp >> 24) & 0xFFu,
+                 (targetIp >> 16) & 0xFFu,
+                 (targetIp >> 8) & 0xFFu,
+                 targetIp & 0xFFu);
+
+        KSTATUS status = NetPingIpv4(deviceIndex, targetIp);
+        DbgPrint("DebugBucket[1]: NetPingIpv4 returned 0x%X\n", status);
+        return status;
+    }
+
+    DbgPrint("DebugBucket: unknown command %llu\n", a0);
+    return STATUS_INVALID_PARAMETER;
+}
+
 // ---------------------------------------------------------------------------
 // Main Kernel Entry
 // ---------------------------------------------------------------------------
@@ -495,7 +554,7 @@ extern void KernelMain(BOOT_INFO* bootInfo) {
 
     HalRegisterScheduler(KeSchedulerTick);
 
-    KeSyscallSetHal(hal);
+    KeSyscallInit(hal, KeCatchAllDebugBucket);
 
     //
     // Dynamic Linking & Driver Execution