From 5339d016c07bf717ee388f4feb73544087324af0 Mon Sep 17 00:00:00 2001
From: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Date: Sat, 6 Jan 2024 09:14:11 +0100
Subject: git: port from mercurial repo.

Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
---
 Source/CodeManager.cxx | 144 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 144 insertions(+)
 create mode 100644 Source/CodeManager.cxx

(limited to 'Source/CodeManager.cxx')

diff --git a/Source/CodeManager.cxx b/Source/CodeManager.cxx
new file mode 100644
index 00000000..47c7bd1b
--- /dev/null
+++ b/Source/CodeManager.cxx
@@ -0,0 +1,144 @@
+/*
+ *	========================================================
+ *
+ *	hCore
+ * 	Copyright Mahrouss Logic, all rights reserved.
+ *
+ * 	========================================================
+ */
+
+#include <KernelKit/FileManager.hpp>
+#include <KernelKit/CodeManager.hpp>
+#include <KernelKit/DebugOutput.hpp>
+#include <KernelKit/ProcessManager.hpp>
+#include <NewKit/KHeap.hpp>
+#include <NewKit/String.hpp>
+#include <NewKit/OwnPtr.hpp>
+#include <NewKit/ErrorID.hpp>
+
+namespace hCore
+{
+    namespace Detail
+    {
+        UInt32 rt_get_pef_platform(void)
+        {
+#ifdef __powerpc
+            return kPefArchPower;
+#elif defined(__arc__)
+	    return kPefArchARC;
+#elif defined(__x86_64__)
+            return kPefArchAMD64;
+#else
+            return kPefArchInvalid;
+#endif // __POWER || __x86_64__
+        }
+    }
+
+    PEFLoader::PEFLoader(const char* path)
+        : fCachedBlob(nullptr), fBad(false)
+    {
+        OwnPtr<FileStream<char>> file;
+		
+        file.New(const_cast<Char*>(path));
+
+        if (StringBuilder::Equals(file->MIME(), this->MIME()))
+        {
+        	fPath = StringBuilder::Construct(path).Leak();
+        	
+            fCachedBlob = file->ReadAll();
+
+            PEFContainer* container = reinterpret_cast<PEFContainer*>(fCachedBlob);
+
+            auto fFree = [&]() -> void {
+                kcout << "CodeManager: Warning: Bad executable, program will not be started!\n";
+                fBad = true;
+
+                kernel_delete_ptr(fCachedBlob);
+                
+                fCachedBlob = nullptr;
+            };
+
+            if (container->Cpu == Detail::rt_get_pef_platform() &&
+                container->Magic[0] == kPefMagic[0] &&
+                container->Magic[1] == kPefMagic[1] &&
+                container->Magic[2] == kPefMagic[2] &&
+                container->Abi == kPefAbi)
+            {
+                if (container->Kind != kPefKindObject &&
+                    container->Kind != kPefKindDebug)
+                {
+                    kcout << "CodeManager: Info: Good executable. can proceed.\n";
+                    return;
+                }
+            }
+
+            fFree();
+        }
+    }
+
+    PEFLoader::~PEFLoader()
+    {
+        if (fCachedBlob)
+            kernel_delete_ptr(fCachedBlob);
+    }
+
+    VoidPtr PEFLoader::FindSymbol(const char* name, Int32 kind)
+    {
+        if (!fCachedBlob ||
+            fBad)
+            return nullptr;
+
+        PEFContainer* container = reinterpret_cast<PEFContainer*>(fCachedBlob);
+
+        PEFCommandHeader* container_header = reinterpret_cast<PEFCommandHeader*>((UIntPtr)fCachedBlob + sizeof(PEFContainer));
+
+        for (SizeT index = 0; index < container->Count; ++index)
+        {
+            kcout << "Iterating over container at index: " << StringBuilder::FromInt("%", index) << ", name: " << container_header->Name << "\n";
+
+            if (StringBuilder::Equals(container_header->Name, name))
+            {
+                kcout << "Found potential container, checking for validity.\n";
+
+                if (container_header->Kind == kind)
+                    return static_cast<UIntPtr*>(fCachedBlob) + container_header->Offset;
+
+                continue;
+            }
+        }
+
+        return nullptr;
+    }
+
+    ErrorOr<VoidPtr> PEFLoader::LoadStart()
+    {
+        if (auto sym = this->FindSymbol("__start", kPefCode); sym)
+            return ErrorOr<VoidPtr>(sym);
+
+        return ErrorOr<VoidPtr>(ME_EXEC_ERROR);
+    }
+
+    bool PEFLoader::IsLoaded() noexcept { return !fBad && fCachedBlob; }
+
+    namespace Utils
+    {
+        bool execute_from_image(PEFLoader& exec)
+        {
+            auto errOrStart = exec.LoadStart();
+
+            if (errOrStart.Error() != 0)
+                return false;
+
+            Process proc(errOrStart.Leak().Leak());
+            Ref<Process> refProc = proc;
+
+            return ProcessManager::Shared().Leak().Add(refProc);
+        }
+    }
+
+    const char* PEFLoader::Path() { return fPath.Leak().CData(); }
+
+    const char* PEFLoader::Format() { return "PEF"; }
+
+    const char* PEFLoader::MIME() { return "application/x-exec"; }
+} // namespace hCore
-- 
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