用于开源处理器OpenRISC精简版AltOR32的软件开发，使用的工具链为or1k-elf-gcc，Makefile和连接脚本为：
1 #***********************************************************************************************
2 # File : Makefile
3 # Author : Lyu Yang
4 # Date :
5 # Description : Makefile for OpenRISC
6 #***********************************************************************************************
7
8 TARGET = main
9
10 CROSS_COMPILE = or1k-elf-
11
12 INCLUDE_DIRS = -I ./
13 LIBRARY_DIRS = -L ./
14
15 CC = $(CROSS_COMPILE)gcc
16 CFLAGS = $(INCLUDE_DIRS) -mno-delay -c -msoft-div -msoft-float -msoft-mul -mno-ror -mno-cmov -mno-sext -Os
17
18 CXX = $(CROSS_COMPILE)g++
19 CXXFLAGS = $(INCLUDE_DIRS) -c -mno-delay -msoft-float -msoft-mul -mno-ror -mno-cmov -mno-sext -Os
20
21 AS = $(CROSS_COMPILE)as
22 ASFLAGS = -c
23
24 LD = $(CROSS_COMPILE)ld
25 LDFLAGS = $(LIBRARY_DIRS) -T./openrisc.lds -Map $(TARGET).map -nostartfiles -nodefaultlibs -nostdlib
26
27 OBJCP = $(CROSS_COMPILE)objcopy
28 OBJCPFLAGS = -O binary -j .text -j .rodata -j .data -j .bss
29
30 AR = $(CROSS_COMPILE)ar
31 ARFLAGS = cr
32
33 DUMP = $(CROSS_COMPILE)objdump
34 DUMPFLAG = --disassemble --syms --all-header
35
36 SIZE = $(CROSS_COMPILE)size
37
38 # Static library files
39 OBJS_LIB +=
40
41 # User should list all object files
42 OBJS += $(patsubst %.S, %.o, $(wildcard *.S))
43 OBJS += $(patsubst %.c, %.o, $(wildcard *.c))
44
45 # Make
46 .PHONY: all clean debug
47 all: $(TARGET).elf $(TARGET).bin $(TARGET).asm $(TARGET).mif
48 $(SIZE) $(TARGET).elf
49
50 %.o: %.S
51 $(AS) $(ASFLAGS) $^ -o $@
52
53 %.o: %.c
54 $(CC) $(CFLAGS) $^ -o $@
55
56 $(TARGET).elf: $(OBJS)
57 $(LD) $(LDFLAGS) $(OBJS_LIB) -o $@ $^
58
59 $(TARGET).asm: $(TARGET).elf
60 $(DUMP) $(DUMPFLAG) $(TARGET).elf > $(TARGET).asm
61
62 $(TARGET).bin: $(TARGET).elf
63 $(OBJCP) $(OBJCPFLAGS) $< $@
64
65 $(TARGET).mif: $(TARGET).bin
66 ./bin2fpga/bin2fpga 4096 $<
67
68 clean:
69 rm -rf *.o *.asm *.elf *.bin *.mif *.map *.coe data.txt
70
71 debug:
72 $(CROSS_COMPILE)gdb $(TARGET).elf -x gdbinit.txt
1 /* Linker script for OpenRISC */
2
3 OUTPUT_FORMAT("elf32-or1k")
4 OUTPUT_ARCH(or1k)
5 ENTRY(_reset)
6
7 MEMORY
8 {
9 RAM (rwx) : ORIGIN = 0x0, LENGTH = 0x4000
10 DRAM (rwx) : ORIGIN = 0x10000000, LENGTH = 0x10000000
11 }
12
13
14 SECTIONS
15 {
16 .text :
17 {
18 _stext = .;
19 stext = .;
20 *(.text)
21 *(.text.*)
22 . = ALIGN(4);
23 _etext = .;
24 etext = .;
25 } > RAM
26
27 .rodata :
28 {
29 _sdata = .;
30 sdata = .;
31 . = ALIGN(4);
32 *(.rodata)
33 *(.rodata.*)
34 } > RAM
35
36 .data :
37 {
38 *(.sdata)
39 *(.data)
40 *(.rwdata)
41 *(.got.plt) *(.got)
42 *(.shdata)
43 *(.data.* .gnu.linkonce.d.*)
44 . = ALIGN (4);
45 _edata = .;
46 edata = .;
47 } > RAM
48
49 .bss :
50 {
51 . = ALIGN(4);
52 __bss_start = .;
53 *(.sbss .sbss.*)
54 *(.bss .bss.*)
55 *(COMMON)
56 . = ALIGN (4);
57 __bss_end = .;
58 } > RAM
59 }
60
61 /* Stack base address */
62 __stack_pointer = 0x4000;