《操作系统》的实验代码。
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  1. PROJ := challenge
  2. EMPTY :=
  3. SPACE := $(EMPTY) $(EMPTY)
  4. SLASH := /
  5. V := @
  6. #need llvm/cang-3.5+
  7. #USELLVM := 1
  8. # try to infer the correct GCCPREFX
  9. ifndef GCCPREFIX
  10. GCCPREFIX := $(shell if i386-elf-objdump -i 2>&1 | grep '^elf32-i386$$' >/dev/null 2>&1; \
  11. then echo 'i386-elf-'; \
  12. elif objdump -i 2>&1 | grep 'elf32-i386' >/dev/null 2>&1; \
  13. then echo ''; \
  14. else echo "***" 1>&2; \
  15. echo "*** Error: Couldn't find an i386-elf version of GCC/binutils." 1>&2; \
  16. echo "*** Is the directory with i386-elf-gcc in your PATH?" 1>&2; \
  17. echo "*** If your i386-elf toolchain is installed with a command" 1>&2; \
  18. echo "*** prefix other than 'i386-elf-', set your GCCPREFIX" 1>&2; \
  19. echo "*** environment variable to that prefix and run 'make' again." 1>&2; \
  20. echo "*** To turn off this error, run 'gmake GCCPREFIX= ...'." 1>&2; \
  21. echo "***" 1>&2; exit 1; fi)
  22. endif
  23. # try to infer the correct QEMU
  24. ifndef QEMU
  25. QEMU := $(shell if which qemu-system-i386 > /dev/null; \
  26. then echo 'qemu-system-i386'; exit; \
  27. elif which i386-elf-qemu > /dev/null; \
  28. then echo 'i386-elf-qemu'; exit; \
  29. elif which qemu > /dev/null; \
  30. then echo 'qemu'; exit; \
  31. else \
  32. echo "***" 1>&2; \
  33. echo "*** Error: Couldn't find a working QEMU executable." 1>&2; \
  34. echo "*** Is the directory containing the qemu binary in your PATH" 1>&2; \
  35. echo "***" 1>&2; exit 1; fi)
  36. endif
  37. # eliminate default suffix rules
  38. .SUFFIXES: .c .S .h
  39. # delete target files if there is an error (or make is interrupted)
  40. .DELETE_ON_ERROR:
  41. # define compiler and flags
  42. ifndef USELLVM
  43. HOSTCC := gcc
  44. HOSTCFLAGS := -g -Wall -O2
  45. CC := $(GCCPREFIX)gcc
  46. CFLAGS := -fno-builtin -Wall -ggdb -m32 -gstabs -nostdinc $(DEFS)
  47. CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
  48. else
  49. HOSTCC := clang
  50. HOSTCFLAGS := -g -Wall -O2
  51. CC := clang
  52. CFLAGS := -fno-builtin -Wall -g -m32 -mno-sse -nostdinc $(DEFS)
  53. CFLAGS += $(shell $(CC) -fno-stack-protector -E -x c /dev/null >/dev/null 2>&1 && echo -fno-stack-protector)
  54. endif
  55. CTYPE := c S
  56. LD := $(GCCPREFIX)ld
  57. LDFLAGS := -m $(shell $(LD) -V | grep elf_i386 2>/dev/null)
  58. LDFLAGS += -nostdlib
  59. OBJCOPY := $(GCCPREFIX)objcopy
  60. OBJDUMP := $(GCCPREFIX)objdump
  61. COPY := cp
  62. MKDIR := mkdir -p
  63. MV := mv
  64. RM := rm -f
  65. AWK := awk
  66. SED := sed
  67. SH := sh
  68. TR := tr
  69. TOUCH := touch -c
  70. OBJDIR := obj
  71. BINDIR := bin
  72. ALLOBJS :=
  73. ALLDEPS :=
  74. TARGETS :=
  75. include tools/function.mk
  76. listf_cc = $(call listf,$(1),$(CTYPE))
  77. # for cc
  78. add_files_cc = $(call add_files,$(1),$(CC),$(CFLAGS) $(3),$(2),$(4))
  79. create_target_cc = $(call create_target,$(1),$(2),$(3),$(CC),$(CFLAGS))
  80. # for hostcc
  81. add_files_host = $(call add_files,$(1),$(HOSTCC),$(HOSTCFLAGS),$(2),$(3))
  82. create_target_host = $(call create_target,$(1),$(2),$(3),$(HOSTCC),$(HOSTCFLAGS))
  83. cgtype = $(patsubst %.$(2),%.$(3),$(1))
  84. objfile = $(call toobj,$(1))
  85. asmfile = $(call cgtype,$(call toobj,$(1)),o,asm)
  86. outfile = $(call cgtype,$(call toobj,$(1)),o,out)
  87. symfile = $(call cgtype,$(call toobj,$(1)),o,sym)
  88. # for match pattern
  89. match = $(shell echo $(2) | $(AWK) '{for(i=1;i<=NF;i++){if(match("$(1)","^"$$(i)"$$")){exit 1;}}}'; echo $$?)
  90. # >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
  91. # include kernel/user
  92. INCLUDE += libs/
  93. CFLAGS += $(addprefix -I,$(INCLUDE))
  94. LIBDIR += libs
  95. $(call add_files_cc,$(call listf_cc,$(LIBDIR)),libs,)
  96. # -------------------------------------------------------------------
  97. # kernel
  98. KINCLUDE += kern/debug/ \
  99. kern/driver/ \
  100. kern/trap/ \
  101. kern/mm/
  102. KSRCDIR += kern/init \
  103. kern/libs \
  104. kern/debug \
  105. kern/driver \
  106. kern/trap \
  107. kern/mm
  108. KCFLAGS += $(addprefix -I,$(KINCLUDE))
  109. $(call add_files_cc,$(call listf_cc,$(KSRCDIR)),kernel,$(KCFLAGS))
  110. KOBJS = $(call read_packet,kernel libs)
  111. # create kernel target
  112. kernel = $(call totarget,kernel)
  113. $(kernel): tools/kernel.ld
  114. $(kernel): $(KOBJS)
  115. @echo + ld $@
  116. $(V)$(LD) $(LDFLAGS) -T tools/kernel.ld -o $@ $(KOBJS)
  117. @$(OBJDUMP) -S $@ > $(call asmfile,kernel)
  118. @$(OBJDUMP) -t $@ | $(SED) '1,/SYMBOL TABLE/d; s/ .* / /; /^$$/d' > $(call symfile,kernel)
  119. $(call create_target,kernel)
  120. # -------------------------------------------------------------------
  121. # create bootblock
  122. bootfiles = $(call listf_cc,boot)
  123. $(foreach f,$(bootfiles),$(call cc_compile,$(f),$(CC),$(CFLAGS) -Os -nostdinc))
  124. bootblock = $(call totarget,bootblock)
  125. $(bootblock): $(call toobj,$(bootfiles)) | $(call totarget,sign)
  126. @echo + ld $@
  127. $(V)$(LD) $(LDFLAGS) -N -e start -Ttext 0x7C00 $^ -o $(call toobj,bootblock)
  128. @$(OBJDUMP) -S $(call objfile,bootblock) > $(call asmfile,bootblock)
  129. @$(OBJCOPY) -S -O binary $(call objfile,bootblock) $(call outfile,bootblock)
  130. @$(call totarget,sign) $(call outfile,bootblock) $(bootblock)
  131. $(call create_target,bootblock)
  132. # -------------------------------------------------------------------
  133. # create 'sign' tools
  134. $(call add_files_host,tools/sign.c,sign,sign)
  135. $(call create_target_host,sign,sign)
  136. # -------------------------------------------------------------------
  137. # create ucore.img
  138. UCOREIMG := $(call totarget,ucore.img)
  139. $(UCOREIMG): $(kernel) $(bootblock)
  140. $(V)dd if=/dev/zero of=$@ count=10000
  141. $(V)dd if=$(bootblock) of=$@ conv=notrunc
  142. $(V)dd if=$(kernel) of=$@ seek=1 conv=notrunc
  143. $(call create_target,ucore.img)
  144. # >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
  145. $(call finish_all)
  146. IGNORE_ALLDEPS = clean \
  147. dist-clean \
  148. grade \
  149. touch \
  150. print-.+ \
  151. handin
  152. ifeq ($(call match,$(MAKECMDGOALS),$(IGNORE_ALLDEPS)),0)
  153. -include $(ALLDEPS)
  154. endif
  155. # files for grade script
  156. TARGETS: $(TARGETS)
  157. .DEFAULT_GOAL := TARGETS
  158. .PHONY: qemu qemu-nox debug debug-nox
  159. qemu-mon: $(UCOREIMG)
  160. $(V)$(QEMU) -monitor stdio -hda $< -serial null
  161. qemu: $(UCOREIMG)
  162. $(V)$(QEMU) -parallel stdio -hda $< -serial null
  163. qemu-nox: $(UCOREIMG)
  164. $(V)$(QEMU) -serial mon:stdio -hda $< -nographic
  165. TERMINAL :=gnome-terminal
  166. debug: $(UCOREIMG)
  167. $(V)$(QEMU) -S -s -parallel stdio -hda $< -serial null &
  168. $(V)sleep 2
  169. $(V)$(TERMINAL) -e "gdb -q -tui -x tools/gdbinit"
  170. debug-nox: $(UCOREIMG)
  171. $(V)$(QEMU) -S -s -serial mon:stdio -hda $< -nographic &
  172. $(V)sleep 2
  173. $(V)$(TERMINAL) -e "gdb -q -x tools/gdbinit"
  174. .PHONY: grade touch
  175. GRADE_GDB_IN := .gdb.in
  176. GRADE_QEMU_OUT := .qemu.out
  177. HANDIN := proj$(PROJ)-handin.tar.gz
  178. TOUCH_FILES := kern/trap/trap.c
  179. MAKEOPTS := --quiet --no-print-directory
  180. grade:
  181. $(V)$(MAKE) $(MAKEOPTS) clean
  182. $(V)$(SH) tools/grade.sh
  183. touch:
  184. $(V)$(foreach f,$(TOUCH_FILES),$(TOUCH) $(f))
  185. print-%:
  186. @echo $($(shell echo $(patsubst print-%,%,$@) | $(TR) [a-z] [A-Z]))
  187. .PHONY: clean dist-clean handin packall tags
  188. clean:
  189. $(V)$(RM) $(GRADE_GDB_IN) $(GRADE_QEMU_OUT) cscope* tags
  190. -$(RM) -r $(OBJDIR) $(BINDIR)
  191. dist-clean: clean
  192. -$(RM) $(HANDIN)
  193. handin: packall
  194. @echo Please visit http://learn.tsinghua.edu.cn and upload $(HANDIN). Thanks!
  195. packall: clean
  196. @$(RM) -f $(HANDIN)
  197. @tar -czf $(HANDIN) `find . -type f -o -type d | grep -v '^\.*$$' | grep -vF '$(HANDIN)'`
  198. tags:
  199. @echo TAGS ALL
  200. $(V)rm -f cscope.files cscope.in.out cscope.out cscope.po.out tags
  201. $(V)find . -type f -name "*.[chS]" >cscope.files
  202. $(V)cscope -bq
  203. $(V)ctags -L cscope.files