MHR-5: initial commit.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>

2 files changed, 64 insertions, 0 deletions

diff --git a/Private/DriverKit/KernelPrint.c b/Private/DriverKit/KernelPrint.c
new file mode 100644
index 00000000..32e20f4f
--- /dev/null
+++ b/Private/DriverKit/KernelPrint.c
@@ -0,0 +1,19 @@
+/* -------------------------------------------
+
+    Copyright Mahrouss Logic
+
+    Purpose: Kernel Text I/O.
+
+------------------------------------------- */
+
+#include "DriverKit/KernelPrint.h"
+
+#ifdef __x86_64__
+static void kernelPrintCharAMD64(const char ch) {
+    __asm__ volatile("outb %%al, %1" : : "a"(ch), "Nd"(0x3F8) : "memory");
+}
+#endif // if __x86_64__
+
+DK_EXTERN void kernelPrintChar(const char ch) {
+    kernelPrintChar(ch);
+}
diff --git a/Private/DriverKit/KernelPrint.h b/Private/DriverKit/KernelPrint.h
new file mode 100644
index 00000000..7e25e304
--- /dev/null
+++ b/Private/DriverKit/KernelPrint.h
@@ -0,0 +1,45 @@
+/* -------------------------------------------
+
+    Copyright Mahrouss Logic
+
+    Purpose: Kernel Text I/O.
+
+------------------------------------------- */
+
+#pragma once
+
+#if defined(__cplusplus)
+#define DK_EXTERN extern "C"
+#else
+#define DK_EXTERN extern
+#endif // defined(__cplusplus)
+
+#include <stdint.h>
+#include <stddef.h>
+
+/// @brief print character into UART.
+DK_EXTERN void kernelPrintChar(const char ch);
+
+static inline size_t kernelStringLength(const char* str) {
+    size_t index = 0;
+
+    while (str[index] != 0) {
+        ++index;
+    }
+
+    return index;
+}
+
+/// @brief print string to UART.
+static inline void kernelPrintStr(const char* message) {
+    if (!message) return;
+    if (*message == 0) return;
+
+    size_t index = 0;
+    size_t len = kernelStringLength(message);
+
+    while (index < len) {
+      kernelPrintChar(message[index]);
+      ++index;
+    }
+}