thumb mode for mini

Makefile

@@ -1,7 +1,8 @@
 include ../../starlet.mk
 
 ASFLAGS += -D_LANGUAGE_ASSEMBLY
-CFLAGS += -DCAN_HAZ_IRQ -DCAN_HAZ_IPC
+CFLAGS += -DCAN_HAZ_IRQ -DCAN_HAZ_IPC -mthumb-interwork
+THUMBFLAGS = -mthumb
 LDSCRIPT = mini.ld
 LIBS = -lgcc
 
@@ -10,10 +11,11 @@ MAKEBIN = python ../makebin.py
 
 TARGET = armboot.elf
 TARGET_BIN = armboot.bin
-OBJS = start.o main.o ipc.o vsprintf.o string.o gecko.o memory.o memory_asm.o \
-	utils_asm.o utils.o ff.o diskio.o sdhc.o powerpc_elf.o powerpc.o panic.o \
-	irq.o irq_asm.o exception.o exception_asm.o seeprom.o crypto.o nand.o \
-	boot2.o ldhack.o sdmmc.o
+OBJS = start.o memory.o memory_asm.o utils_asm.o panic.o irq_asm.o ipc.o \
+	exception_asm.o nand.o exception.o ldhack.o
+THUMB_OBJS = sdmmc.o sdhc.o boot2.o powerpc.o powerpc_elf.o diskio.o ff.o \
+	     crypto.o seeprom.o utils.o main.o vsprintf.o string.o \
+	     gecko.o irq.o
 
 include ../../common.mk
 
@@ -21,6 +23,11 @@ all: $(TARGET_BIN)
 
 main.o: main.c git_version.h
 
+$(THUMB_OBJS): %.o : %.c
+	@echo "  COMPILE[T]   $<"
+	@mkdir -p $(DEPDIR)
+	@$(CC) $(CFLAGS) $(THUMBFLAGS) $(DEFINES) -Wp,-MMD,$(DEPDIR)/$(*F).d,-MQ,"$@",-MP -c $< -o $@
+
 $(TARGET_BIN): $(TARGET) $(ELFLOADER) 
 	@echo  "MAKEBIN	$@"
 	@$(MAKEBIN) $(ELFLOADER) $< $@

start.S

@@ -104,7 +104,8 @@ done_bss2:
 	bl	debug_output
 	@ take the plunge
 	mov	r0, r4
-	bl	_main
+	ldr	r4, =(_main+1)
+	blx	r4
 	@ _main returned! Go to whatever address it returned...
 	mov	pc, r0