Zack Buhman
e449090df0
This includes several improvements to the link flags, link script, common makefile, etc.. Previously bss initialization in m68k start was incorrect. m68k can now call static initializers if necessary.
116 lines
3.3 KiB
Makefile
116 lines
3.3 KiB
Makefile
LIB ?= .
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OPT ?= -Og
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AARCH = --isa=sh2 --big
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AFLAGS = -g -gdwarf-4 --fatal-warnings
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CARCH = -m2 -mb
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CFLAGS += -falign-functions=4 -ffunction-sections -fdata-sections -fshort-enums -ffreestanding -nostdlib
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CFLAGS += -Wall -Werror -Wfatal-errors -Wno-error=unused-variable -g -gdwarf-4 $(OPT)
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LDFLAGS = --gc-sections --print-gc-sections --no-warn-rwx-segment --print-memory-usage --entry=_start --orphan-handling=error
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CXXFLAGS = -std=c++20 -fno-exceptions -fno-non-call-exceptions -fno-rtti -fno-threadsafe-statics
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TARGET = sh2-none-elf-
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CC = $(TARGET)gcc
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CXX = $(TARGET)g++
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AS = $(TARGET)as
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LD = $(TARGET)ld
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OBJCOPY = $(TARGET)objcopy
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OBJDUMP = $(TARGET)objdump
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define BUILD_BINARY_O
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$(OBJCOPY) \
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-I binary -O elf32-sh -B sh2 \
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--rename-section .data=.data.$(basename $@) \
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$< $@
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endef
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$(LIB)/sys_%.o: $(LIB)/segasmp/lib/sys_%.o
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$(OBJCOPY) -I coff-sh -O elf32-sh -g \
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--rename-section .text=.text.$* \
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$< $@
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SYS_IP_OBJ += $(LIB)/sys_id.o
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SYS_IP_OBJ += $(LIB)/sys_sec.o
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SYS_IP_OBJ += $(LIB)/sys_area.o $(LIB)/sys_areb.o $(LIB)/sys_aree.o $(LIB)/sys_arej.o
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SYS_IP_OBJ += $(LIB)/sys_arek.o $(LIB)/sys_arel.o $(LIB)/sys_aret.o $(LIB)/sys_areu.o
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SYS_IP_OBJ += $(LIB)/sys_init.o
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SYS_IP_OBJ += $(LIB)/smpsys.o
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%.o: %.s
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$(AS) $(AFLAGS) $(AARCH) $< -o $@
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%.o: %.S
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$(CC) $(CFLAGS) $(CARCH) -c $< -o $@
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%.o: %.c
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$(CC) $(CFLAGS) $(CARCH) -c $< -o $@
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%.o: %.cpp
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$(CXX) $(CFLAGS) $(CXXFLAGS) $(CARCH) -c $< -o $@
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%.elf:
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$(LD) $(LDFLAGS) -T $(LIB)/sh2.lds $^ -o $@
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%.bin: %.elf
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$(OBJCOPY) -O binary $< $@
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%.bin.o: %.bin
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$(OBJCOPY) \
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-I binary -O elf32-sh -B sh \
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--rename-section .data=.rodata,alloc,load,readonly,data,contents \
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$< $@
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sys_ip.elf: $(SYS_IP_OBJ)
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$(LD) --print-memory-usage -T $(LIB)/sys_ip.lds $^ -o $@
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# mkisofs sorts file names alphabetically, it does not place the files in the
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# generated directory descriptors the order given on the command-line.
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#
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# The "1st read file" must be physically placed at index [2] (after the "self"
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# and "parent" entries) of the root directory, and so must be alphabetically
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# lowest in the list of files.
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#
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# Additionally, the sega bios appears to reject disks that have a single
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# file. This is presumably incomplete enforcement of the "required" smp_cpy.txt,
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# smp_abs.txt, and smp_bib.txt files. A disk with a single file is presumed
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# invalid (but >=2 files appears to be ok). The content of these files does not
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# appear to be checked.
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#
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# Rather than insert a dummy file to "trick" the bios, I decided to include
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# these files as specified in the manual (perhaps there are some bios versions
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# that do check this).
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#
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# `-graft-points` is used to enable the "path grafting" pathspec syntax.
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%.iso: %.bin sys_ip.bin
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mkisofs \
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-sysid "SEGA SEGASATURN" \
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-volid "SAMPLE_GAME_TITLE" \
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-volset "SAMPLE_GAME_TITLE" \
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-publisher "SEGA ENTERPRISES, LTD." \
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-preparer "SEGA ENTERPRISES, LTD." \
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-copyright "smp_cpy.txt" \
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-abstract "smp_abs.txt" \
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-biblio "smp_bib.txt" \
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-sectype data \
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-G sys_ip.bin \
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-o $@ \
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-graft-points \
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/0$(notdir ${<})=./${<} \
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/=$(LIB)/segasmp/smp_cpy.txt \
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/=$(LIB)/segasmp/smp_abs.txt \
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/=$(LIB)/segasmp/smp_bib.txt
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%.cue: %.iso
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@echo "FILE \"$(notdir ${<})\" BINARY" > $@
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@echo " TRACK 01 MODE1/2048" >> $@
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@echo " INDEX 01 00:00:00" >> $@
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clean:
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rm -f *.iso *.o *.bin *.elf *.cue
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.SUFFIXES:
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.INTERMEDIATE:
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.SECONDARY:
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.PHONY: all clean
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