Added drivers

Generic/ExampleDriver/Example.cpp

@@ -0,0 +1,73 @@
+#include "../../../Kernel/DAPI.hpp"
+#include "../../../Kernel/Fex.hpp"
+
+extern "C" int DriverEntry(KernelAPI *Data);
+int CallbackHandler(KernelCallback *Data);
+
+/*                           The driver is
+ *       This is a driver     for Fennix     Driver Entry Extended Header
+ *              *                   *              *             */
+HEAD(FexFormatType_Driver, FexOSType_Fennix, DriverEntry);
+
+// Ignore the warning about missing field initializers
+#pragma GCC diagnostic ignored "-Wmissing-field-initializers"
+
+// Extended header which is used to give additional information to the kernel
+__attribute__((section(".extended"))) FexExtended ExtendedHeader = {
+    .Driver = {
+        .Name = "Example Driver",
+        .Type = FexDriverType_Generic,
+        .Callback = CallbackHandler,
+        .Bind = {
+            .Type = BIND_INTERRUPT,
+            .Interrupt = {
+                .Vector = 0xFE,
+            }}}};
+
+// Global variable that holds the kernel API
+KernelAPI *KAPI;
+
+/* --------------------------------------------------------------------------------------------------------- */
+
+// Driver entry point. This is called at initialization. "Data" argument points to the kernel API structure.
+int DriverEntry(KernelAPI *Data)
+{
+    // Check if kernel API is valid
+    if (!Data)
+        return INVALID_KERNEL_API;
+
+    // // Check if kernel API version is valid. this is important because the kernel API may change in the future.
+    if (Data->Version.Major < 0 || Data->Version.Minor < 0 || Data->Version.Patch < 0)
+        return KERNEL_API_VERSION_NOT_SUPPORTED;
+
+    // Set the global variable to the kernel API
+    KAPI = Data;
+
+    // We print "Hello World!" to UART.
+    KAPI->Util.DebugPrint(((char *)"Hello World!" + KAPI->Info.Offset), KAPI->Info.DriverUID);
+    return OK;
+}
+
+// This is called when the driver is bound to an interrupt, process, or PCI device or when the kernel wants to send a message to the driver.
+int CallbackHandler(KernelCallback *Data)
+{
+    switch (Data->Reason)
+    {
+    case AcknowledgeReason:
+    {
+        KAPI->Util.DebugPrint(((char *)"Kernel acknowledged the driver." + KAPI->Info.Offset), KAPI->Info.DriverUID);
+        break;
+    }
+    case InterruptReason:
+    {
+        KAPI->Util.DebugPrint(((char *)"Interrupt received." + KAPI->Info.Offset), KAPI->Info.DriverUID);
+        break;
+    }
+    default:
+    {
+        KAPI->Util.DebugPrint(((char *)"Unknown reason." + KAPI->Info.Offset), KAPI->Info.DriverUID);
+        break;
+    }
+    }
+    return OK;
+}

Generic/ExampleDriver/Makefile

@@ -0,0 +1,100 @@
+# Config file
+include ../../../Makefile.conf
+
+FILENAME = ExampleDriver.fex
+
+CC = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)gcc
+CPP = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)g++
+LD = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)ld
+AS = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)as
+OBJDUMP = ../../../$(COMPILER_PATH)/$(COMPILER_ARCH)objdump
+
+GIT_COMMIT = $(shell git rev-parse HEAD)
+GIT_COMMIT_SHORT = $(shell git rev-parse --short HEAD)
+
+ifeq ($(OSARCH), amd64)
+S_SOURCES = $(shell find ./ -type f -name '*.S' -not -path "./arch/i686/*" -not -path "./arch/aarch64/*")
+C_SOURCES = $(shell find ./ -type f -name '*.c' -not -path "./arch/i686/*" -not -path "./arch/aarch64/*")
+CPP_SOURCES = $(shell find ./ -type f -name '*.cpp' -not -path "./arch/i686/*" -not -path "./arch/aarch64/*")
+else ifeq ($(OSARCH), i686)
+S_SOURCES = $(shell find ./ -type f -name '*.S' -not -path "./arch/amd64/*" -not -path "./arch/aarch64/*")
+C_SOURCES = $(shell find ./ -type f -name '*.c' -not -path "./arch/amd64/*" -not -path "./arch/aarch64/*")
+CPP_SOURCES = $(shell find ./ -type f -name '*.cpp' -not -path "./arch/amd64/*" -not -path "./arch/aarch64/*")
+else ifeq ($(OSARCH), aarch64)
+S_SOURCES = $(shell find ./ -type f -name '*.S' -not -path "./arch/amd64/*" -not -path "./arch/i686/*")
+C_SOURCES = $(shell find ./ -type f -name '*.c' -not -path "./arch/amd64/*" -not -path "./arch/i686/*")
+CPP_SOURCES = $(shell find ./ -type f -name '*.cpp' -not -path "./arch/amd64/*" -not -path "./arch/i686/*")
+endif
+HEADERS = $(sort $(dir $(wildcard ../../include/*)))
+OBJ = $(C_SOURCES:.c=.o) $(CPP_SOURCES:.cpp=.o) $(ASM_SOURCES:.asm=.o) $(S_SOURCES:.S=.o) $(PSF_SOURCES:.psf=.o) $(BMP_SOURCES:.bmp=.o)
+INCLUDE_DIR = ../../include
+
+LDFLAGS := 									\
+	-fPIC -fno-pie 							\
+	-Wl,-static,--no-dynamic-linker,-ztext 	\
+	-nostdlib -nodefaultlibs -nolibc  		\
+	-zmax-page-size=0x1000					\
+	-Wl,-Map file.map -shared
+
+WARNCFLAG = -Wall -Wextra
+
+CFLAGS :=										\
+	-I$(INCLUDE_DIR)							\
+	-DGIT_COMMIT='"$(GIT_COMMIT)"'				\
+	-DGIT_COMMIT_SHORT='"$(GIT_COMMIT_SHORT)"'
+
+ifeq ($(OSARCH), amd64)
+
+CFLAGS += -fPIC -fno-pie -mno-80387 -mno-mmx -mno-3dnow	\
+		  -mno-red-zone -mno-sse -mno-sse2				\
+		  -march=x86-64 -pipe -ffunction-sections		\
+		  -mcmodel=kernel -msoft-float -fno-builtin
+LDFLAGS += -Tarch/amd64/linker.ld
+
+else ifeq ($(OSARCH), i686)
+
+CFLAGS += -fPIC -fno-pie -mno-80387 -mno-mmx -mno-3dnow			\
+		  -mno-red-zone -mno-sse -mno-sse2 -ffunction-sections	\
+		  -march=i686 -pipe -msoft-float -fno-builtin
+LDFLAGS += -Tarch/i686/linker.ld
+
+else ifeq ($(OSARCH), aarch64)
+
+CFLAGS += -pipe -fno-builtin -fPIC
+LDFLAGS += -Tarch/aarch64/linker.ld
+
+endif
+
+build: $(FILENAME)
+ifeq ($(OSARCH), amd64)
+	$(OBJDUMP) -b binary -D -m i386:x86-64 -d $(FILENAME) > file_dump.map
+else ifeq ($(OSARCH), i686)
+
+else ifeq ($(OSARCH), aarch64)
+
+endif
+	mv $(FILENAME) ../../out/$(FILENAME)
+
+$(FILENAME): $(OBJ)
+	$(CC) $(LDFLAGS) $(OBJ) -o $@
+
+%.o: %.c $(HEADERS)
+	$(info Compiling $<)
+	$(CC) $(CFLAGS) $(WARNCFLAG) -std=c17 -c $< -o $@
+
+%.o: %.cpp $(HEADERS)
+	$(info Compiling $<)
+	$(CPP) $(CFLAGS) $(WARNCFLAG) -std=c++20 -fexceptions -c $< -o $@ -fno-rtti
+
+%.o: %.S
+	$(info Compiling $<)
+ifeq ($(OSARCH), amd64)
+	$(AS) -o $@ $<
+else ifeq ($(OSARCH), i686)
+	$(AS) -o $@ $<
+else ifeq ($(OSARCH), aarch64)
+	$(AS) -o $@ $<
+endif
+
+clean:
+	rm -f *.o file.map file_dump.map $(OBJ)

Generic/ExampleDriver/arch/amd64/linker.ld

@@ -0,0 +1,40 @@
+OUTPUT_FORMAT(binary)
+OUTPUT_ARCH(i386:x86-64)
+
+ENTRY(DriverEntry)
+
+SECTIONS
+{
+    .header :
+    {
+        *(.header .header.*)
+        *(.extended .extended.*)
+    }
+
+    .text :
+    {
+        *(.text .text.*)
+    }
+
+    .data :
+    {
+        *(.data .data.*)
+    }
+
+    .rodata :
+    {
+        *(.rodata .rodata.*)
+    }
+
+    .bss :
+    {
+        *(COMMON)
+        *(.bss .bss.*)
+    }
+
+    /DISCARD/ :
+    {
+        *(.eh_frame)
+        *(.note .note.*)
+    }
+}