progress: ImGui Port - Desktop UI + ImGui rendering performance overhaul

Full ImGui desktop environment (desktop.pas):
- Gradient wallpaper, taskbar with clock, start menu
- Desktop icons with click-to-open
- Windowed apps: System Info, Terminal, File Browser, Task Manager
- Terminal dispatches to registered kernel commands with output capture

Performance: Software rasterizer rewrite (imgui.pas, imgbridge.c)
- Quad detection: merge consecutive triangle pairs into fast rect fills
- 3 new fast-path rect fillers (solid/gradient/textured) using REP STOSD
  and 16.16 fixed-point integer inner loops
- Triangle rasterizer rewritten with fixed-point edge functions
- Back-buffer clear: DrawPixel loop -> REP STOSD (~200x faster)
- Render stat debug counters added

ISR-safe input buffering (imgbridge.c)
- Keyboard/mouse events buffered in lock-free ring buffers from ISR context
- Drained once per frame from main loop to prevent data races

Other changes:
- imguitypes.pas: InputTextFlags renumbered for cimgui 1.91+
- video.pas: backBufferLocation getter added
- kernel.pas: VFS init moved earlier, main loop uses desktop_frame,
  mouse hook uses ISR-safe buffering
- lmemorymanager.pas: kalloc/kfree exported with public aliases for C linkage
- scheduler.pas: Root_Task moved to interface for desktop task manager
- terminal.pas: freeParams exposed in interface

.drone.yml

@@ -50,17 +50,3 @@ steps:
       - |
         curl -X PUT https://gitea.spexeah.com/api/packages/Spexeah/generic/asuro-iso/latest/Asuro.iso \
         -H "Authorization: token $GITEA_TOKEN" --upload-file "Asuro-$(git rev-parse --short HEAD).iso"
-
-  - name: msg status
-    image: appleboy/drone-discord
-    failure: ignore
-    depends_on:
-      - compile
-    when:
-      status: [success, failure, changed]
-    settings:
-      webhook_id:
-        from_secret: discord_webhook_id
-      webhook_token:
-        from_secret: discord_webhook_secret
-      message: "**Asuro Build**\n\n{{#success build.status}}✅ Build successful!\n\n{{else}}❌ Build failed!\n\n{{/success}}Repository: `{{repo.namespace}}/{{repo.name}}`\nBranch: `{{commit.branch}}`\nCommit: `{{commit.sha}}`\nAuthor: `{{commit.author}} <{{commit.email}}>`\n\nGitea Diff: [Link](<{{commit.link}}>)\nDrone Build: [Link](<{{build.link}}>)\n\nMessage: {{commit.message}}"

.gitignore

@@ -11,7 +11,3 @@
 /*.img
 src/include/asuro.pas
 localenv.json
-/lvgl/
-dockerout.txt
-AGENTS.md
-*.log

.mailmap

@@ -1,13 +0,0 @@
-# Map all Aaron identities to a single preferred identity
-Aaron Hance <[email protected]> aaron <aaron@6dbc8c32-bb84-406f-8558-d1cf31a0ab0c>
-Aaron Hance <[email protected]> aaronhance <[email protected]>
-Aaron Hance <[email protected]> aaron hance <[email protected]>
-Aaron Hance <[email protected]> Aaron <[email protected]>
-
-# Map all Kieron identities to a single preferred identity
-Kieron Morris <[email protected]> kieron <kieron@6dbc8c32-bb84-406f-8558-d1cf31a0ab0c>
-Kieron Morris <[email protected]> Kieron <[email protected]>
-Kieron Morris <[email protected]> t3hn3rd <[email protected]>
-
-# Map goose's multiple identities
-goose <goose@6dbc8c32-bb84-406f-8558-d1cf31a0ab0c> goose <[email protected]>

Dockerfile

@@ -5,11 +5,14 @@ VOLUME ["/code"]
 ENV DEBIAN_FRONTEND=noninteractive
 RUN dpkg --add-architecture i386
 RUN apt-get update && apt-get install -y \
-	curl dos2unix wget git make nasm binutils xorriso grub-pc-bin gcc gcc-multilib && \
+	curl dos2unix wget git make nasm binutils xorriso grub-pc-bin \
+	gcc-multilib g++-multilib && \
 	apt-get clean my room
 
+RUN git clone --depth=1 --recurse-submodules https://github.com/cimgui/cimgui.git /cimgui
+
 SHELL ["/bin/bash", "-c"]
-ARG FPC_VERSION=3.2.2
+ARG FPC_VERSION=2.6.4
 RUN curl -sL https://sourceforge.net/projects/freepascal/files/Linux/$FPC_VERSION/fpc-$FPC_VERSION.i386-linux.tar/download | tar -xf - && \
 	pushd fpc-$FPC_VERSION.i386-linux && ./install.sh && popd && \
 	rm -rf fpc-$FPC_VERSION.i386-linux

compile.sh

@@ -7,7 +7,7 @@ echo "Asuro Compilation"
 echo " "
 
 #Compile Stub.asm
-rm -f lib/*
+rm lib/*
 
 runOrFail() {
 	local binary=$1
@@ -23,7 +23,7 @@ runOrFail() {
 declare -a run_steps=(
 	"compile_stub.sh" "Failed to compile stub!"
 	"compile_vergen.sh" "Versions failed to compile"
-	"compile_lvgl.sh" "Failed to compile LVGL!"
+	"compile_imgui.sh" "Failed to compile ImGui!"
 	"compile_sources.sh" "Failed to compile FPC Sources!"
 	"compile_link.sh" "Failed linking!"
 	"compile_isogen.sh" "Failed to create ISO!"

compile_imgui.sh

@@ -0,0 +1,90 @@
+#!/usr/bin/env bash
+echo " "
+echo "======================="
+echo " "
+echo "Compiling ImGui (cimgui)..."
+echo " "
+
+IMGUI_DIR=/cimgui
+IMGUI_SRC=$IMGUI_DIR/imgui
+BRIDGE_SRC=src/driver/video/imgui
+
+# Flags shared by all C/C++ compilation units:
+#   -m32              -> i386 target
+#   -ffreestanding    -> no implicit stdlib inclusion
+#   -fno-builtin      -> don't inline memcpy/memset/etc. so our stubs are used
+#   -O2               -> optimise for speed
+#   -ffunction-sections -fdata-sections -> allow --gc-sections in linker
+C_FLAGS="-m32 -ffreestanding -fno-builtin -O2 -ffunction-sections -fdata-sections"
+
+# Extra flags for C++ translation units (cimgui/imgui sources):
+#   -fno-exceptions         -> no stack-unwinding machinery
+#   -fno-rtti               -> no typeinfo / dynamic_cast
+#   -fno-use-cxa-atexit     -> don't emit __cxa_atexit calls for static dtors
+#   -fno-threadsafe-statics -> no guard-variable emission for local statics
+# NOTE: *not* -ffreestanding / -fno-builtin here — imgui includes <cmath> and
+#       other hosted headers that refuse to compile in freestanding mode.
+#       The object files are archived into a static lib and linked freestanding;
+#       any hosted-stdlib calls (malloc/free/sin/cos/…) resolve to crtshim.c.
+CPP_FLAGS="-m32 -O2 -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti -fno-use-cxa-atexit -fno-threadsafe-statics -fno-stack-protector -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=0 -DNDEBUG -DIMGUI_ENABLE_STB_TRUETYPE"
+
+INCLUDE="-I$IMGUI_DIR -I$IMGUI_SRC"
+
+echo "Compiling C runtime shim..."
+gcc $C_FLAGS $INCLUDE \
+    -c $BRIDGE_SRC/crtshim.c \
+    -o lib/imgui_crtshim.o || { echo "Failed: crtshim.c"; exit 1; }
+
+echo "Compiling render bridge..."
+# imgbridge is compiled as C++ so it sees cimgui.h function declarations
+# (C++ mode is required; the .c extension is overridden with -x c++)
+g++ $CPP_FLAGS $INCLUDE \
+    -x c++ \
+    -DCIMGUI_DEFINE_ENUMS_AND_STRUCTS \
+    -c $BRIDGE_SRC/imgbridge.c \
+    -o lib/imgui_bridge.o || { echo "Failed: imgbridge.c"; exit 1; }
+
+echo "Compiling cimgui wrapper..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_DIR/cimgui.cpp \
+    -o lib/imgui_cimgui.o || { echo "Failed: cimgui.cpp"; exit 1; }
+
+echo "Compiling imgui core..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_SRC/imgui.cpp \
+    -o lib/imgui_core.o || { echo "Failed: imgui.cpp"; exit 1; }
+
+echo "Compiling imgui draw..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_SRC/imgui_draw.cpp \
+    -o lib/imgui_draw.o || { echo "Failed: imgui_draw.cpp"; exit 1; }
+
+echo "Compiling imgui tables..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_SRC/imgui_tables.cpp \
+    -o lib/imgui_tables.o || { echo "Failed: imgui_tables.cpp"; exit 1; }
+
+echo "Compiling imgui widgets..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_SRC/imgui_widgets.cpp \
+    -o lib/imgui_widgets.o || { echo "Failed: imgui_widgets.cpp"; exit 1; }
+
+echo "Compiling imgui demo..."
+g++ $CPP_FLAGS $INCLUDE \
+    -c $IMGUI_SRC/imgui_demo.cpp \
+    -o lib/imgui_demo.o || { echo "Failed: imgui_demo.cpp"; exit 1; }
+
+echo "Archiving cimgui.a..."
+# NOTE: imgui_bridge.o and imgui_crtshim.o are NOT in the archive because
+# compile_link.sh already picks them up individually via find lib/ -name "*.o".
+# Including them here would cause duplicate symbol errors.
+ar rcs lib/cimgui.a \
+    lib/imgui_cimgui.o \
+    lib/imgui_core.o \
+    lib/imgui_draw.o \
+    lib/imgui_tables.o \
+    lib/imgui_widgets.o \
+    lib/imgui_demo.o || { echo "Failed: ar"; exit 1; }
+
+echo "ImGui compiled successfully."
+exit 0

compile_link.sh

@@ -14,9 +14,6 @@ done;
 objstring=lib/stub.o" "$objstring 
 echo "Object Files: "$objstring
 echo " "
-
-# Find libgcc for i386 (needed by LVGL compiled with gcc)
 LIBGCC=$(gcc -m32 -print-libgcc-file-name)
-echo "libgcc: ${LIBGCC}"
+ld -m elf_i386 -s --gc-sections -Tlinker.script -o bin/kernel.bin $objstring \
-
+    --start-group lib/cimgui.a $LIBGCC --end-group
-ld -m elf_i386 -s --gc-sections -Tlinker.script -o bin/kernel.bin $objstring --start-group lib/liblvgl.a ${LIBGCC} --end-group

compile_lvgl.sh

@@ -1,117 +0,0 @@
-#!/usr/bin/env bash
-# compile_lvgl.sh — Download LVGL v9.2 source and compile into lib/liblvgl.a
-# Clone & compile in /tmp (fast container-local fs).
-# Copy source + objects to /lvgl (host mount) for debugging.
-set -e
-
-LVGL_VERSION="v9.2.2"
-LVGL_REPO="https://github.com/lvgl/lvgl.git"
-LVGL_DIR="/tmp/lvgl"
-OBJ_DIR="/tmp/lvgl_obj"
-CONF_DIR="$(pwd)/lvglh"
-OUT_DIR="$(pwd)/lib"
-
-CC="gcc"
-CFLAGS="-m32 -march=i686 -ffreestanding \
-    -fno-builtin -fno-stack-protector -fno-pic -fno-pie \
-    -O2 -Wall -Wno-unused-function -Wno-unused-variable \
-    -I${CONF_DIR} \
-    -I${LVGL_DIR} \
-    -I${LVGL_DIR}/.. \
-    -DLV_CONF_INCLUDE_SIMPLE"
-
-echo " "
-echo "======================="
-echo " "
-echo "Compiling LVGL..."
-echo " "
-
-# Clone LVGL into /tmp (container-local)
-rm -rf "$LVGL_DIR"
-echo "Downloading LVGL ${LVGL_VERSION}..."
-git clone --depth 1 --branch "${LVGL_VERSION}" "${LVGL_REPO}" "${LVGL_DIR}" 2>&1
-echo "Download complete."
-
-# Gather all LVGL .c source files (core library only, no demos/examples)
-SOURCES=$(find "${LVGL_DIR}/src" -name '*.c' -not -path '*/test/*')
-TOTAL=$(echo "$SOURCES" | wc -l)
-echo "Found ${TOTAL} LVGL source files."
-
-# Compile each .c file to .o (container-local)
-rm -rf "$OBJ_DIR"
-mkdir -p "$OBJ_DIR"
-
-COUNT=0
-ERRORS=0
-for src in $SOURCES; do
-    COUNT=$((COUNT + 1))
-    rel="${src#${LVGL_DIR}/src/}"
-    obj_path="${OBJ_DIR}/${rel%.c}.o"
-    mkdir -p "$(dirname "$obj_path")"
-
-    if ! $CC $CFLAGS -c "$src" -o "$obj_path" 2>&1; then
-        echo "FAILED: $rel"
-        ERRORS=$((ERRORS + 1))
-    fi
-
-    if [ $((COUNT % 50)) -eq 0 ]; then
-        echo "  Compiled ${COUNT}/${TOTAL}..."
-    fi
-done
-
-echo "Compiled ${COUNT} files (${ERRORS} errors)."
-
-if [ "$ERRORS" -ne 0 ]; then
-    echo "LVGL compilation FAILED with ${ERRORS} errors."
-    exit 1
-fi
-
-# Archive into static library
-OBJECTS=$(find "$OBJ_DIR" -name '*.o')
-ar rcs "${OUT_DIR}/liblvgl.a" $OBJECTS
-echo "Created ${OUT_DIR}/liblvgl.a"
-
-# Compile custom LVGL extension files from lvglh/
-LVGLH_SOURCES=$(find "${CONF_DIR}" -name '*.c' 2>/dev/null || true)
-if [ -n "$LVGLH_SOURCES" ]; then
-    echo " "
-    echo "Compiling custom LVGL files from lvglh/..."
-    LVGLH_OBJ_DIR="/tmp/lvglh_obj"
-    rm -rf "$LVGLH_OBJ_DIR"
-    mkdir -p "$LVGLH_OBJ_DIR"
-    HCOUNT=0
-    HERRORS=0
-    for src in $LVGLH_SOURCES; do
-        HCOUNT=$((HCOUNT + 1))
-        rel="${src#${CONF_DIR}/}"
-        obj_path="${LVGLH_OBJ_DIR}/${rel%.c}.o"
-        mkdir -p "$(dirname "$obj_path")"
-        echo "  [lvglh] $rel"
-        if ! $CC $CFLAGS -c "$src" -o "$obj_path" 2>&1; then
-            echo "  FAILED: $rel"
-            HERRORS=$((HERRORS + 1))
-        fi
-    done
-    echo "Compiled ${HCOUNT} custom files (${HERRORS} errors)."
-    if [ "$HERRORS" -ne 0 ]; then
-        echo "Custom LVGL compilation FAILED."
-        exit 1
-    fi
-    # Append custom objects into the existing archive
-    HOBJECTS=$(find "$LVGLH_OBJ_DIR" -name '*.o')
-    ar rcs "${OUT_DIR}/liblvgl.a" $HOBJECTS
-    echo "Updated ${OUT_DIR}/liblvgl.a with custom objects."
-else
-    echo "No custom LVGL files in lvglh/."
-fi
-
-# Copy source + objects to /lvgl host mount for debugging
-echo "Copying LVGL source and objects to host mount..."
-rm -rf /lvgl/* /lvgl/.[!.]* /lvgl/..?* 2>/dev/null || true
-cp -a "$LVGL_DIR/src" /lvgl/src
-cp -a "$OBJ_DIR" /lvgl/obj
-echo "Done."
-
-echo " "
-echo "LVGL compilation complete."
-echo " "

compile_sources.sh

@@ -4,4 +4,4 @@ echo "======================="
 echo " "
 echo "Compiling FPC Sources..."
 echo " "
-fpc -Aelf -gw -g -gl -n -v0ew -O3 -OpPENTIUM3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/* -Fusrc/driver/net/* src/kernel.pas
+fpc -Aelf -gw -g -gl -n -vlewn -O3 -Op3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/driver/video/* -Fusrc/driver/video/imgui/* src/kernel.pas

docker-compose.yml

@@ -3,4 +3,3 @@ services:
     build: .
     volumes:
       - .:/code
-      - ./lvgl:/lvgl

dockerout.txt

@@ -0,0 +1,20 @@
+4023:CIMGUI_API float igGetWindowDpiScale(void);
+4081:CIMGUI_API const ImVec4_c* igGetStyleColorVec4(ImGuiCol idx);
+4082:CIMGUI_API ImVec2_c igGetCursorScreenPos(void);
+4084:CIMGUI_API ImVec2_c igGetContentRegionAvail(void);
+4085:CIMGUI_API ImVec2_c igGetCursorPos(void);
+4086:CIMGUI_API float igGetCursorPosX(void);
+4087:CIMGUI_API float igGetCursorPosY(void);
+4091:CIMGUI_API ImVec2_c igGetCursorStartPos(void);
+4350:CIMGUI_API void igBeginDisabled(bool disabled);
+4372:CIMGUI_API ImVec2_c igGetItemRectMin(void);
+4373:CIMGUI_API ImVec2_c igGetItemRectMax(void);
+4374:CIMGUI_API ImVec2_c igGetItemRectSize(void);
+4377:CIMGUI_API ImDrawList* igGetBackgroundDrawList(ImGuiViewport* viewport);
+4378:CIMGUI_API ImDrawList* igGetForegroundDrawList_ViewportPtr(ImGuiViewport* viewport);
+4387:CIMGUI_API ImVec2_c igCalcTextSize(const char* text,const char* text_end,bool hide_text_after_double_hash,float wrap_width);
+4388:CIMGUI_API ImVec4_c igColorConvertU32ToFloat4(ImU32 in);
+4405:CIMGUI_API bool igIsMouseDoubleClicked_Nil(ImGuiMouseButton button);
+5092:CIMGUI_API ImDrawList* igGetForegroundDrawList_WindowPtr(ImGuiWindow* window);
+5161:CIMGUI_API void igBeginDisabledOverrideReenable(void);
+5244:CIMGUI_API bool igIsMouseDoubleClicked_ID(ImGuiMouseButton button,ImGuiID owner_id);

src/console.pas

@@ -838,6 +838,18 @@ const
 	MAX_WINDOWS = 255; //< Maximum number of Windows open.
     DefaultWND  = 0;   //< The Window assigned for output when no Window is specified. (Default).
 
+type
+    TWNDCaptureCallback = procedure(s: pchar);
+
+var
+    WND_CaptureActive   : boolean = false;
+    WND_CaptureHWND     : uint32 = 0;
+    WND_CaptureBuf      : array[0..511] of char;
+    WND_CaptureBufIdx   : uint32 = 0;
+    WND_CaptureCallback : TWNDCaptureCallback = nil;
+
+procedure flushCapture;
+
 implementation
 
 uses
@@ -2259,6 +2271,7 @@ var
    x,y: Byte;
 
 begin
+     if WND_CaptureActive and (WND = WND_CaptureHWND) then exit;
      if WindowManager.Windows[WND] <> nil then begin
         for y:=0 to Console_Properties.MAX_CELL_Y do begin
             for x:=0 to Console_Properties.MAX_CELL_X do begin
@@ -2419,8 +2432,26 @@ begin
      console.writeintlnexWND(i, Console_Properties.Default_Attribute, WND);
 end;
 
+procedure flushCapture;
+begin
+    if WND_CaptureActive and (WND_CaptureCallback <> nil) and (WND_CaptureBufIdx > 0) then begin
+        WND_CaptureBuf[WND_CaptureBufIdx] := #0;
+        WND_CaptureCallback(@WND_CaptureBuf[0]);
+        WND_CaptureBufIdx := 0;
+        WND_CaptureBuf[0] := #0;
+    end;
+end;
+
 procedure writecharexWND(character: char; attributes: uint32; WND : uint32); 
 begin
+    if WND_CaptureActive and (WND = WND_CaptureHWND) and (WND_CaptureCallback <> nil) then begin
+        if WND_CaptureBufIdx < 511 then begin
+            WND_CaptureBuf[WND_CaptureBufIdx] := character;
+            inc(WND_CaptureBufIdx);
+            WND_CaptureBuf[WND_CaptureBufIdx] := #0;
+        end;
+        exit;
+    end;
     if WindowManager.Windows[WND] <> nil then begin
         WindowManager.Windows[WND]^.Buffer[WindowManager.Windows[WND]^.Cursor.Y][WindowManager.Windows[WND]^.Cursor.X].Character:= character;
         WindowManager.Windows[WND]^.Buffer[WindowManager.Windows[WND]^.Cursor.Y][WindowManager.Windows[WND]^.Cursor.X].Attributes:= attributes;
@@ -2603,6 +2634,13 @@ end;
 
 procedure backspaceWND(WND : uint32);
 begin
+     if WND_CaptureActive and (WND = WND_CaptureHWND) then begin
+        if WND_CaptureBufIdx > 0 then begin
+            dec(WND_CaptureBufIdx);
+            WND_CaptureBuf[WND_CaptureBufIdx] := #0;
+        end;
+        exit;
+     end;
      if WindowManager.Windows[WND] <> nil then begin
         Dec(WindowManager.Windows[WND]^.Cursor.X);
         writecharWND(' ', WND);
@@ -2659,6 +2697,13 @@ end;
 
 procedure _safeincrement_y_WND(WND : uint32);
 begin
+     if WND_CaptureActive and (WND = WND_CaptureHWND) and (WND_CaptureCallback <> nil) then begin
+        WND_CaptureBuf[WND_CaptureBufIdx] := #0;
+        WND_CaptureCallback(@WND_CaptureBuf[0]);
+        WND_CaptureBufIdx := 0;
+        WND_CaptureBuf[0] := #0;
+        exit;
+     end;
      if WindowManager.Windows[WND] <> nil then begin
         WindowManager.Windows[WND]^.Cursor.Y:= WindowManager.Windows[WND]^.Cursor.Y+1;
         if WindowManager.Windows[WND]^.Cursor.Y > WindowManager.Windows[WND]^.WND_H-1 then begin

src/driver/interface/serial.pas

@@ -58,19 +58,16 @@ begin
 end;
 
 function sinb(port : uint16) : uint8;
-var
-     tmp : uint8;
 begin
      asm
           PUSH EAX
           PUSH EDX
           MOV DX, port
           IN AL, DX
-          MOV tmp, AL
+          MOV sinb, AL
           POP EDX
           POP EAX
      end;
-     sinb := tmp;
      io_wait;
 end;
 

src/driver/net/l5/dhcp.pas

@@ -491,26 +491,22 @@ begin
         
         { Create a new header to the use in our DHCP REQUEST packet }
         SendHeader:= createHeader();
-        CopyIPv4(@getIPv4Config^.Address[0], puint8(@SendHeader^.Client_IP[0]));
+        CopyIPv4(puint8(@Header^.Your_IP[0]), puint8(@SendHeader^.Client_IP[0]));
         CopyIPv4(puint8(@Header^.Server_IP[0]), puint8(@SendHeader^.Server_IP[0]));
         processHeader(SendHeader);
 
         { Setup Options }
         SendOptions:= newOptions();
-
         { Create a message type option and assign it the value REQUEST }
         SendMsgType:= ord(TDHCPMessageType.REQUEST);
         NewOption(SendOptions, TDHCPOpCode.DHCP_MESSAGE_TYPE, void(@SendMsgType), 1, false);
-
         { Create a Requested IP option and assign it the value from the OFFER packet header }
-        NewOption(SendOptions, TDHCPOpCode.REQUESTED_IP_ADDRESS, void(@Header^.Your_IP[0]), 4, false);
+        NewOption(SendOptions, TDHCPOpCode.REQUESTED_IP_ADDRESS, void(@SendHeader^.Client_IP[0]), 4, false);
-
         { Create a Server Identifier Option and assign it the value from the OFFER packet options }
         Option:= getOptionByOpcode(Options, TDHCPOpCode.SERVER_IDENTIFIER);
         if Option <> nil then begin
             NewOption(SendOptions, TDHCPOpCode.SERVER_IDENTIFIER, void(@Option^.Value[0]), 4, false);
         end;
-
         { Create a Parameter Request List, Request the following: Netmask, Gateway, DNS Name & DNS Server }
         RequestParams[0]:= Ord(TDHCPOpCode.SUBNET_MASK);
         RequestParams[1]:= Ord(TDHCPOpCode.ROUTER);
@@ -526,13 +522,9 @@ begin
         MAC:= getMAC();
         packetCtx:= PPacketContext(Kalloc(sizeof(TPacketContext)));
         packetCtx^.TTL:= 128;
-
-        { Copy over MAC - src: broadcast - dst: DHCP Server }
-        copyMAC(MAC, @packetCtx^.MAC.Source[0]);
         copyMAC(@BROADCAST_MAC[0], @packetCtx^.MAC.Destination[0]);
-        
+        copyMAC(MAC, @packetCtx^.MAC.Source[0]);
-        { Copy over IP - src: NULL - dst: Broadcast }
+        copyIPv4(@NULL_IP[0], @packetCtx^.IP.Source[0]);
-        CopyIPv4(@getIPv4Config^.Address[0], @packetCtx^.IP.Source[0]);
         copyIPv4(@BROADCAST_IP[0], @packetCtx^.IP.Destination[0]);
 
         { Setup UDPContext (UDP) & copy in the correct details }
@@ -578,7 +570,7 @@ begin
 
     { Check the frame is for us and then process }
     MAC:= getMAC;
-    if MACEqual(@context^.PacketContext^.MAC.Destination[0], MAC) or MACEqual(@context^.PacketContext^.MAC.Destination[0], BROADCAST_MAC) then begin
+    if MACEqual(@context^.PacketContext^.MAC.Destination[0], MAC) then begin
         Outputln('DHCP','Frame is addressed to us.');
         { Check the message type is client specific }
         If Header^.Message_Type = $02 then begin
@@ -663,7 +655,7 @@ begin
         copyMAC(@BROADCAST_MAC[0], @packetCtx^.MAC.Destination[0]);
         MAC:= getMAC;
         copyMAC(MAC, @packetCtx^.MAC.Source[0]);
-        CopyIPv4(@getIPv4Config^.Address[0], @packetCtx^.IP.Source[0]);
+        copyIPv4(@NULL_IP[0], @packetCtx^.IP.Source[0]);
         copyIPv4(@BROADCAST_IP[0], @packetCtx^.IP.Destination[0]);
 
         { Setup UDPContext (UDP) }

src/driver/storage/vfs.pas

@@ -92,6 +92,7 @@ var
     Root              : PVFSObject;
     CurrentDirectory  : pchar = nil;
     PushPopDirectory  : PLinkedListBase;
+    MountDepth        : uint32 = 0;
 
 procedure init();
 Function OpenFile(Filename : pchar; OpenMode : TOpenMode; WriteMode : TWriteMode; Lock : Boolean; Error : PError) : TFileHandle;
@@ -104,6 +105,7 @@ function GetDirectories(Handle : uint32; Path : pchar) : PHashMap;
 function PathValid(Path : pchar) : TIsPathValid;
 function changeDirectory(Path : pchar) : TIsPathValid;
 function getWorkingDirectory : pchar;
+function GetDirectoryListing(Path : pchar) : PHashMap;
 
 //VFS Functions
 function newVirtualDirectory(Path : pchar) : TError;
@@ -288,6 +290,7 @@ begin
             NewObj:= PVFSObject(hashmap.get(ht, item));                                            
             if NewObj = nil then begin                                                              
                 GetObjectFromPath:= nil;
+                STRLL_Free(SplitPath);
                 tracer.push_trace('vfs.GetObjectFromPath.shortexit_1');
                 exit;
             end;                                                                                    
@@ -304,6 +307,7 @@ begin
         end;
     end;                                                                                           
     GetObjectFromPath:= Obj;
+    STRLL_Free(SplitPath);
     tracer.push_trace('vfs.GetObjectFromPath.exit');
 end;
 
@@ -348,7 +352,17 @@ begin
                 GetDirectoryListing:= nil;
             end; 
             otMOUNT:begin
-                GetDirectoryListing:= GetDirectoryListing(PVFSMount(Obj^.Reference)^.Path);
+                { Safety: cap mount-follow depth to prevent infinite recursion
+                  from circular mounts.  Use a simple static counter. }
+                if MountDepth < 16 then begin
+                    Inc(MountDepth);
+                    GetDirectoryListing:= GetDirectoryListing(PVFSMount(Obj^.Reference)^.Path);
+                    Dec(MountDepth);
+                end else
+                    GetDirectoryListing:= nil;
+            end;
+            else begin
+                GetDirectoryListing:= nil;
             end;
         end;
     end else begin
@@ -420,7 +434,7 @@ begin
 
     NewObj^.Reference:= void(NewDev);
 
-    hashmap.add(ht, stringCopy(DeviceName), void(NewDev));
+    hashmap.add(ht, stringCopy(DeviceName), void(NewObj));
 end;
 
 { Filesystem Functions }

src/driver/video/doublebuffer.pas

@@ -32,7 +32,8 @@ implementation
 function allocateBackBuffer(Width : uint32; Height : uint32; BitsPerPixel : uint8) : uint64;
 begin
     tracer.push_trace('doublebuffer.allocateBackBuffer.enter');
-    allocateBackBuffer:= uint64(klalloc((Width * Height * BitsPerPixel) div 8));
+    //This doesn't currently work... Needs a rework of lmemorymanager
+    allocateBackBuffer:= uint64(klalloc((Width * Height) * BitsPerPixel));
     tracer.push_trace('doublebuffer.allocateBackBuffer.exit');
 end;
 
@@ -53,13 +54,8 @@ end;
 
 procedure Flush(FrontBuffer : PVideoBuffer; BackBuffer : PVideoBuffer);
 var
-    idx : uint32;
     Back,Front : uint32;
-    BufferSize : uint32;
+    Count64 : uint32;
-
-const
-    //COPY_WIDTH = 64; //Use this for 64bit copies
-    COPY_WIDTH = 128; //Use this for SSE copies
 
 begin
     //tracer.push_trace('doublebuffer.Flush.enter');
@@ -67,11 +63,32 @@ begin
     if ((FrontBuffer^.Width > BackBuffer^.Width) or (FrontBuffer^.Height > BackBuffer^.Height)) then exit;
     Back:= BackBuffer^.Location;
     Front:= FrontBuffer^.Location;
-    BufferSize:= ( ( BackBuffer^.Width * BackBuffer^.Height * BackBuffer^.BitsPerPixel) div COPY_WIDTH ) - 1;
+    { Number of 64-byte blocks: total_bytes / 64 = (W * H * BPP/8) / 64 }
-    for idx:=0 to BufferSize do begin
+    Count64:= ( BackBuffer^.Width * BackBuffer^.Height * BackBuffer^.BitsPerPixel) div 512;
-        //Front[idx]:= Back[idx];
+    if Count64 = 0 then exit;
-        // -- TODO: Get SSE working here for 128bit copies --
+    { Bulk SSE copy: 4 x MOVAPS (64 bytes) per iteration.
-        __SSE_128_memcpy(Back + (idx * 16), Front + (idx * 16));  
+      4x fewer loop iterations than the old per-16-byte function-call loop. }
+    asm
+        PUSH ESI
+        PUSH EDI
+        MOV ESI, Back
+        MOV EDI, Front
+        MOV ECX, Count64
+    @sseloop:
+        MOVAPS XMM0, [ESI]
+        MOVAPS XMM1, [ESI + 16]
+        MOVAPS XMM2, [ESI + 32]
+        MOVAPS XMM3, [ESI + 48]
+        MOVAPS [EDI], XMM0
+        MOVAPS [EDI + 16], XMM1
+        MOVAPS [EDI + 32], XMM2
+        MOVAPS [EDI + 48], XMM3
+        ADD ESI, 64
+        ADD EDI, 64
+        DEC ECX
+        JNZ @sseloop
+        POP EDI
+        POP ESI
     end;
     //tracer.push_trace('doublebuffer.Flush.exit');
 end;