Merged in MHR-23 (pull request #12)

MHR-23: Merge work.

1 files changed, 68 insertions, 0 deletions

diff --git a/Kernel/KernelKit/MSDOS.hpp b/Kernel/KernelKit/MSDOS.hpp
new file mode 100644
index 00000000..8b27ca58
--- /dev/null
+++ b/Kernel/KernelKit/MSDOS.hpp
@@ -0,0 +1,68 @@
+/* -------------------------------------------
+
+    Copyright SoftwareLabs
+
+    File: MSDOS.hpp
+    Purpose: MS-DOS header for NewOS.
+
+    Revision History:
+
+    30/01/24: Added file (amlel)
+
+------------------------------------------- */
+
+#ifndef __MSDOS_EXEC__
+#define __MSDOS_EXEC__
+
+#include <KernelKit/PE.hxx>
+#include <NewKit/Defines.hpp>
+
+// Last Rev
+// Sat Feb 24 CET 2024
+
+#define kMagMz0 'M'
+#define kMagMz1 'Z'
+
+typedef NewOS::UInt32 DosWord;
+typedef NewOS::Long	  DosLong;
+
+typedef struct _DosHeader
+{
+	NewOS::UInt8 eMagic[2];
+	DosWord		 eMagLen;
+	DosWord		 ePagesCount;
+	DosWord		 eCrlc;
+	DosWord		 eCParHdr;
+	DosWord		 eMinAlloc;
+	DosWord		 eMaxAlloc;
+	DosWord		 eStackSeg;
+	DosWord		 eStackPtr;
+	DosWord		 eChksum;
+	DosWord		 eIp;
+	DosWord		 eCs;
+	DosWord		 eLfarlc;
+	DosWord		 eOvno;
+	DosWord		 eRes[4];
+	DosWord		 eOemid;
+	DosWord		 eOeminfo;
+	DosWord		 eRes2[10];
+	DosLong		 eLfanew;
+} DosHeader, *DosHeaderPtr;
+
+namespace NewOS
+{
+	/// @brief Find the PE header inside the the blob.
+	inline auto rt_find_exec_header(DosHeaderPtr ptrDos) -> VoidPtr
+	{
+		if (!ptrDos)
+			return nullptr;
+		if (ptrDos->eMagic[0] != kMagMz0)
+			return nullptr;
+		if (ptrDos->eMagic[1] != kMagMz1)
+			return nullptr;
+
+		return (VoidPtr)(&ptrDos->eLfanew + 1);
+	}
+} // namespace NewOS
+
+#endif /* ifndef __MSDOS_EXEC__ */