Migrate KE subsystem to C++

xtoskrnl/ke/bootinfo.cc

@@ -0,0 +1,149 @@
+/**
+ * PROJECT:         ExectOS
+ * COPYRIGHT:       See COPYING.md in the top level directory
+ * FILE:            xtoskrnl/ke/bootinfo.cc
+ * DESCRIPTION:     Bootloader-provided system information handling support
+ * DEVELOPERS:      Aiken Harris <harraiken91@gmail.com>
+ */
+
+#include <xtos.hh>
+
+
+/* Kernel Library */
+namespace KE
+{
+
+XTAPI
+PVOID
+BootInformation::GetDebugPrint(VOID)
+{
+    return InitializationBlock->LoaderInformation.DbgPrint;
+}
+
+/**
+ * Retrieves the system firmware type (BIOS or UEFI).
+ *
+ * @return This routine returns the type of the system firmware.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+SYSTEM_FIRMWARE_TYPE
+BootInformation::GetFirmwareType(VOID)
+{
+    return InitializationBlock->FirmwareInformation.FirmwareType;
+}
+
+/**
+ * Retrieves a pointer to the specified kernel parameter within the kernel parameters list.
+ *
+ * @param ParameterName
+ *        Supplies a pointer to a null-terminated wide string specifying the name of the parameter to search for.
+ *
+ * @param Parameter
+ *        Supplies a pointer to a variable that receives a pointer to the matching parameter, or NULL if not found.
+ *
+ * @return This routine returns a status code.
+ *
+ * @since XT 1.0
+ */
+XTAPI
+XTSTATUS
+BootInformation::GetKernelParameter(IN PCWSTR ParameterName,
+                                    OUT PCWSTR *Parameter)
+{
+    PCWSTR Match, SearchStart;
+    SIZE_T ParameterNameLength;
+
+    /* Validate input parameters */
+    if(!ParameterName || !Parameter)
+    {
+        /* Invalid input parameters, return error */
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    /* Get the length of the parameter name we are looking for */
+    ParameterNameLength = RtlWideStringLength(ParameterName, 0);
+    if(ParameterNameLength == 0)
+    {
+        /* Do not allow empty parameter names */
+        return STATUS_INVALID_PARAMETER;
+    }
+
+    /* Assume the requested parameter is not present in the kernel parameters */
+    *Parameter = nullptr;
+
+    /* Start searching from the beginning of the list */
+    SearchStart = InitializationBlock->KernelParameters;
+
+    /* Search for the parameter name */
+    while((Match = RtlFindWideStringInsensitive(SearchStart, ParameterName)))
+    {
+        /* Check if the match is at the start of the string or preceded by a space */
+        if(Match == InitializationBlock->KernelParameters || *(Match - 1) == L' ')
+        {
+            /* Check the character after the match to avoid matching prefixes */
+            if(Match[ParameterNameLength] == L'\0' ||
+               Match[ParameterNameLength] == L' ' ||
+               Match[ParameterNameLength] == L'=')
+            {
+                /* A valid parameter was found, return a pointer to it */
+                *Parameter = Match;
+                return STATUS_SUCCESS;
+            }
+        }
+
+        /* The match was a substring of a larger token, continue searching */
+        SearchStart = Match + 1;
+    }
+
+    /* Parameter not found */
+    return STATUS_NOT_FOUND;
+}
+
+/**
+ *
+ *
+ *
+ *
+ */
+XTAPI
+PLIST_ENTRY
+BootInformation::GetSystemResources(VOID)
+{
+    return &InitializationBlock->SystemResourcesListHead;
+}
+
+/**
+ *
+ *
+ *
+ *
+ */
+XTAPI
+VOID
+BootInformation::SetInitializationBlock(IN PKERNEL_INITIALIZATION_BLOCK Block)
+{
+    InitializationBlock = Block;
+}
+
+} /* namespace */
+
+
+/* TEMPORARY FOR COMPATIBILITY WITH C CODE */
+XTCLINK
+XTAPI
+XTSTATUS
+KeGetKernelParameter(IN PCWSTR ParameterName,
+                   OUT PCWSTR *Parameter)
+{
+    return KE::BootInformation::GetKernelParameter(ParameterName, Parameter);
+}
+
+XTCLINK
+XTAPI
+PKERNEL_INITIALIZATION_BLOCK
+KeGetInitializationBlock(VOID)
+{
+    return KE::BootInformation::GetInitializationBlock();
+}