Basic start of a Wii U Toolchain.

Makefile

@@ -0,0 +1,26 @@
+WUT_ROOT := $(CURDIR)
+TARGETS := crt rpl
+
+all:
+	@for dir in $(TARGETS); do \
+		echo; \
+		echo Entering Directory $$dir; \
+		$(MAKE) --no-print-directory -C $$dir; \
+		echo Leaving Directory $$dir; \
+	done
+
+clean:
+	@rm -rf lib
+	@for dir in $(TARGETS); do \
+		echo Cleaning $$dir; \
+		$(MAKE) --no-print-directory -C $$dir clean; \
+	done
+
+install:
+	@mkdir -p lib
+	@for dir in $(TARGETS); do \
+		echo Installing $$dir; \
+		$(MAKE) --no-print-directory -C $$dir install; \
+	done
+
+.PHONY: all clean install

crt/Makefile

@@ -0,0 +1,24 @@
+WUT_ROOT := $(CURDIR)/..
+include $(WUT_ROOT)/rules/ppc.mk
+
+CFILES  := $(wildcard *.c)
+SFILES  := $(wildcard *.S)
+CRT0    := crt0.o
+
+STUBS   := $(SFILES:.S=.o) $(CFILES:.c=.o)
+
+all: $(STUBS) $(CRT0)
+
+clean:
+	@echo "[RM] $(notdir $(CRT0))"
+	@rm -f $(STUBS) $(CRT0)
+
+install: all
+	@mkdir -p $(WUT_ROOT)/lib
+	@cp -f *.o $(WUT_ROOT)/lib
+
+%.o: %.S
+	@echo "[CC]  $(notdir $<)"
+	@$(CC) $(CFLAGS) -c $< -o $@
+
+.PHONY: all clean

crt/crt0.S

@@ -0,0 +1,10 @@
+.extern main
+.extern _Exit
+.global _start
+_start:
+	bl main
+	b _Exit
+
+.global __eabi
+__eabi:
+	blr

include/coreinit_crt.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void
+_Exit();
+
+#ifdef __cplusplus
+}
+#endif

include/coreinit_debug.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void
+OSFatal(const char *msg);
+
+#ifdef __cplusplus
+}
+#endif

include/gx2_init.h

@@ -0,0 +1,12 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void
+GX2Init();
+
+#ifdef __cplusplus
+}
+#endif

rpl/Makefile

@@ -0,0 +1,25 @@
+WUT_ROOT := $(CURDIR)/..
+TARGETS := libcoreinit libgx2
+
+all:
+	@for dir in $(TARGETS); do \
+		echo; \
+		echo Entering Directory $$dir; \
+		$(MAKE) --no-print-directory -C $$dir; \
+		echo Leaving Directory $$dir; \
+	done
+
+clean:
+	@for dir in $(TARGETS); do \
+		echo Cleaning $$dir; \
+		$(MAKE) --no-print-directory -C $$dir clean; \
+	done
+
+install: all
+	@mkdir -p $(WUT_ROOT)/lib
+	@for dir in $(TARGETS); do \
+		echo Installing $$dir; \
+		cp $$dir/*.a $(WUT_ROOT)/lib; \
+	done
+
+.PHONY: all install clean

rpl/common/lib.c

@@ -0,0 +1,20 @@
+#include "config.h"
+
+typedef struct {
+	const char* name;
+	const void* fstub;
+} __attribute__((__packed__)) rpl_header;
+
+static const void* fstub[0] __attribute__((section(".data.rplFuncStubs")));
+static const const char name[] __attribute__((section(".rodata.rplNames"))) = LIBRARY_NAME;
+
+static rpl_header header __attribute__((section(".lib.rplLibs"))) = {
+	name,
+	fstub,
+};
+
+#define EXPORT(name) \
+	extern void* name; \
+	const void* name##_stub __attribute__((section(".data.rplFuncStubs"))) = &name; \
+
+#include "exports.h"

rpl/common/rules.mk

@@ -0,0 +1,68 @@
+.SUFFIXES:
+
+TARGET  := $(notdir $(CURDIR))
+BUILD   := build
+SOURCE  := ../common .
+INCLUDE := .
+DATA    := data
+LIBS    :=
+
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+WUT_ROOT := $(CURDIR)/../..
+else
+WUT_ROOT := $(CURDIR)/../../..
+endif
+include $(WUT_ROOT)/rules/ppc.mk
+
+LD        := $(PREFIX)ld
+RPLCFLAGS := -Wno-unused-variable -fPIC -fpic -fno-builtin
+CFLAGS    += -O2 -Wall -std=c11 $(RPLCFLAGS)
+ODEPS     := stub.o lib.o
+
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+
+export OUTPUT   := $(CURDIR)/$(TARGET)
+export VPATH    := $(foreach dir,$(SOURCE),$(CURDIR)/$(dir)) \
+                   $(foreach dir,$(DATA),$(CURDIR)/$(dir))
+export BUILDDIR := $(CURDIR)/$(BUILD)
+export DEPSDIR  := $(BUILDDIR)
+
+CFILES    := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.c)))
+CXXFILES  := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES    := $(foreach dir,$(SOURCE),$(notdir $(wildcard $(dir)/*.S)))
+
+export OFILES := $(CFILES:.c=.o) \
+                 $(CXXFILES:.cpp=.o) \
+                 $(SFILES:.S=.o)
+
+export INCLUDES := $(foreach dir,$(INCLUDE),-I$(CURDIR)/$(dir)) \
+                   -I$(CURDIR)/$(BUILD)
+
+.PHONY: $(BUILD) clean
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+clean:
+	@echo "[RM] $(notdir $(OUTPUT))"
+	@rm -rf $(BUILD) $(OUTPUT).elf $(OUTPUT).a
+
+else
+
+DEPENDS := $(OFILES:.o=.d)
+OFILES  := $(filter-out $(ODEPS),$(OFILES))
+
+$(OUTPUT).a: rpl.o $(OFILES)
+
+lib.o: lib.c
+	@echo "[CC]  $(notdir $<)"
+	@$(CC) $(DEPSOPTIONS) $(RPLCFLAGS) -S $(INCLUDES) $< -o lib.S
+	@$(CC) $(DEPSOPTIONS) $(RPLCFLAGS) -c lib.S -o $@
+
+rpl.o: $(ODEPS)
+	@$(LD) $(LDFLAGS) -r $(ODEPS) -o $@
+
+-include $(DEPENDS)
+
+endif

rpl/common/stub.S

@@ -0,0 +1,13 @@
+#include "config.h"
+
+#define EXPORT(name) \
+.align 2; \
+.section ".rplTramp.text","ax"; \
+	.global name; \
+	name: \
+		li %r0, 0; \
+		oris %r0, %r0, 0; \
+		mtctr %r0; \
+		bctr; \
+
+#include "exports.h"

rpl/libcoreinit/Makefile

@@ -0,0 +1,2 @@
+-include ../common/rules.mk
+-include ../../common/rules.mk

rpl/libcoreinit/config.h

@@ -0,0 +1,2 @@
+#define LIBRARY_NAME "coreinit.rpl"
+#define LIBRARY_SYMBOL coreinit

rpl/libcoreinit/exports.h

@@ -0,0 +1,2 @@
+EXPORT(_Exit);
+EXPORT(OSFatal);

rpl/libgx2/Makefile

@@ -0,0 +1,2 @@
+-include ../common/rules.mk
+-include ../../common/rules.mk

rpl/libgx2/config.h

@@ -0,0 +1,2 @@
+#define LIBRARY_NAME "gx2.rpl"
+#define LIBRARY_SYMBOL gx2

rpl/libgx2/exports.h

@@ -0,0 +1 @@
+EXPORT(GX2Init);

rules/base.mk

@@ -0,0 +1,54 @@
+ifeq ($(strip $(DEVKITPRO)),)
+$(error "Please ensure DEVKITPRO is in your environment.")
+endif
+
+ifeq ($(strip $(DEVKITPPC)),)
+$(error "Please ensure DEVKITPPC is in your environment.")
+endif
+
+export PORTLIBS := $(DEVKITPRO)/portlibs/ppc
+export PATH := $(DEVKITPPC)/bin:$(PORTLIBS)/bin:$(PATH)
+
+PREFIX  := powerpc-eabi-
+OBJCOPY := $(PREFIX)objcopy
+AR      := $(PREFIX)ar
+AS      := $(PREFIX)gcc
+CC      := $(PREFIX)gcc
+CXX     := $(PREFIX)g++
+STRIP   := $(PREFIX)strip
+
+ifeq ($(findstring $(PREFIX),$(LD)),)
+LD := $(CC)
+endif
+
+DEPSOPTIONS = -MMD -MP -MF $(DEPSDIR)/$*.d
+
+ifdef VERBOSE
+DEPSOPTIONS += -v
+endif
+
+%.o: %.c
+	@echo "[CC]  $(notdir $<)"
+	@$(CC) $(DEPSOPTIONS) $(CFLAGS) $(INCLUDES) -c $< -o $@
+
+%.o: %.cpp
+	@echo "[CXX] $(notdir $<)"
+	@$(CXX) $(DEPSOPTIONS) $(CXXFLAGS) $(INCLUDES) -c $< -o $@
+
+%.o: %.s
+	@echo "[CC]  $(notdir $<)"
+	@$(AS) $(DEPSOPTIONS) -x assembler-with-cpp $(ASFLAGS) $(INCLUDES) -c $< -o $@
+
+%.o: %.S
+	@echo "[CC]  $(notdir $<)"
+	@$(AS) $(DEPSOPTIONS) -x assembler-with-cpp $(ASFLAGS) $(INCLUDES) -c $< -o $@
+
+%.a:
+	@echo "[AR]  $(notdir $@)"
+	@$(AR) -rcs $@ $^
+
+%.elf:
+	@echo "[LD]  $(notdir $@)"
+	@echo "[LD]  $(LIBPATHS)"
+	@echo "[LD]  $(LDFLAGS)"
+	@$(LD) -v $^ $(LIBPATHS) $(LIBS) $(LDFLAGS) -o $@

rules/ppc.mk

@@ -0,0 +1,9 @@
+LIBPATHS  := -L$(WUT_ROOT)/lib
+CFLAGS    := -I$(WUT_ROOT)/include -fno-builtin -ffreestanding
+CXXFLAGS  := $(CFLAGS)
+LDFLAGS   := -nostdlib -nostartfiles -T $(WUT_ROOT)/rules/rpl.ld
+
+include $(WUT_ROOT)/rules/base.mk
+
+%.rpx: %.elf
+	@$(STRIP) $< -o $(BUILDDIR)/$(notdir $<)

rules/rpl.ld

@@ -0,0 +1,66 @@
+OUTPUT_FORMAT("elf32-powerpc")
+OUTPUT_ARCH(powerpc:common)
+
+ENTRY(_start)
+
+MEMORY {
+	system (rw) : ORIGIN = 0x01000000, LENGTH = 32M
+	code (rwx) : ORIGIN = 0x02000000, LENGTH = 224M
+	data (rw) : ORIGIN = 0x10000000, LENGTH = 800M
+}
+
+PHDRS {
+}
+
+SECTIONS {
+	. = ORIGIN(code);
+
+	/* Standard code section */
+	.text . : { *(.text .stub .text.*) }
+
+	/*
+	 * Trampolines for each RPL function, have the same symbol name of
+	 * than the function they should import.
+	 *
+	 * There will be 2 relocations in each trampoline pointing to the
+	 * function stub inside the .data.rplFuncStubs, we can edit these
+	 * relocation entries to use the RPL import during conversion to RPL.
+	 *
+	 *   li    r0, func_stub@lo -> .data.rplFuncStubs
+	 *   oris  r0, func_stub@hi -> .data.rplFuncStubs
+	 *   mtctr r0
+	 *   bctr
+	 */
+	.rplTramp.text . : {
+		*(.rplTramp.text)
+		*(SORT(.rplTramp.text.*))
+	}
+	
+	/* Standard data sections */
+	. = ORIGIN(data);
+
+	.rodata . : { *(.rodata .rodata.*) }
+	.data . : { *(.data) }
+	.bss . : { *(.bss) }
+
+	/* System stuff is for our elf2rpl converter to go through */
+	. = ORIGIN(system);
+
+	/*
+     * Contains the name of RPLs, referenced by .lib.rplLibs
+     */
+	.rodata.rplNames . : { KEEP (*(.rodata.rplNames)) }
+
+	/*
+	 * List of RPL libraries to import, in format:
+	 *   uint32_t nameAddress -> .rodata.rplNames
+	 *   uint32_t firstFuncEntry -> .data.rplFuncStubs
+	 */
+	.lib.rplLibs . : { KEEP (*(.lib.rplLibs)) }
+
+	/*
+     * List of functions an RPL exports, in format:
+     *   uint32_t trampAddress
+	 */
+	.data.rplFuncStubs . : { KEEP (*(.data.rplFuncStubs)) }
+}

rules/rpl.mk

@@ -0,0 +1,12 @@
+LIBPATHS  := -L$(WUT_ROOT)/lib
+CFLAGS    := -I$(WUT_ROOT)/include -fno-builtin -ffreestanding
+CXXFLAGS  := $(CFLAGS)
+LDFLAGS   := -nostdlib -nostartfiles $(WUT_ROOT)/lib/crt0.o -T $(WUT_ROOT)/rules/rpl.ld
+
+include $(WUT_ROOT)/rules/base.mk
+
+%.rpx: %.elf
+	@$(STRIP) $< -o $(BUILDDIR)/$(notdir $<)
+
+%.rpl: %.elf
+	@$(STRIP) $< -o $(BUILDDIR)/$(notdir $<)