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018 CC=gcc
019 AR=ar
020 CP=cp
021 STRIP=strip
022 OBJCOPY=objcopy
023 CFLAGS = -Wall -nostdinc -ffreestanding -I. -I.. -O
024 LIBGCC = $(shell $(CC) -print-libgcc-file-name)
025 LDFLAGS = -Wl,--warn-common -nostdlib -Wl,-Tldscript.lds
026
027
028 all: userprogs.kimg
029
030 -include .mkvars
031
032 PROGS := init myprog1 myprog2 myprog3 myprog4 myprog5 myprog6 \
033 myprog7 myprog8 myprog9 myprog10 myprog11 myprog12 \
034 myprog13 myprog14 banner fstest devtest shell
035
036 # Build dependencies of the programs
037 init: fstest_utils.o
038 fstest: fstest_utils.o
039 devtest: fstest_utils.o
040 shell: fstest_utils.o
041 $(PROGS) : % : %.o crt.o libc.a
042
043 PWD := $(shell pwd | sed 's/"/\\\"/g;s/\$$/\\\$$/g')
044
045
046 $(PROGS):
047 $(CC) -static $(LDFLAGS) -o $@ $^ $(LIBGCC)
048
049
050 libc.a: libc.o string.o stdarg.o debug.o
051
052
053 userprogs.kimg: $(PROGS)
054 @echo "# Generating ELF images for inclusion into the kernel image: $@"
055 @echo "SECTIONS { .userprogs . : { " > .userprogs.lds
056 @i=0 ; \
057 for f in $^ ; do \
058 i=`expr $$i + 1` ; \
059 echo "extern char _begin_userprog$$i, _end_userprog$$i;" \
060 > .userprog$$i.c ; \
061 echo "char *_userprog"$$i"_entry[]" >> .userprog$$i.c ; \
062 echo " __attribute__((section(\".userprogs_table\")))" \
063 >> .userprog$$i.c ; \
064 echo " = { \"$$f\", &_begin_userprog$$i, &_end_userprog$$i };" \
065 >> .userprog$$i.c ; \
066 $(CC) $(CFLAGS) -c .userprog$$i.c -o .userprog$$i.o ; \
067 $(CP) $$f $$f.strip && $(STRIP) -sx $$f.strip ; \
068 $(OBJCOPY) --add-section .userprog$$i=$$f.strip .userprog$$i.o \
069 .userprog$$i.kimg ; \
070 echo " . = ALIGN(4096);" >> .userprogs.lds ; \
071 echo " _begin_userprog$$i = .;" >> .userprogs.lds ; \
072 echo " .userprog$$i.kimg(.userprog$$i);" >> .userprogs.lds ; \
073 echo " _end_userprog$$i = .;" >> .userprogs.lds ; \
074 echo " .userprog$$i.kimg(.rodata); .userprog$$i.kimg(.data);" \
075 >> .userprogs.lds ; \
076 done
077 @echo " _userprogs_table = .; *(.userprogs_table) ; LONG(0);" \
078 >> .userprogs.lds
079 @echo "} /DISCARD/ : { *(.text) *(.data) *(.bss) } }" \
080 >> .userprogs.lds
081 @$(LD) -r -o $@ -T.userprogs.lds
082
083
084 %.a:
085 $(AR) rcv $@ $^
086
087
088 %.o: %.c
089 $(CC) "-I$(PWD)" -c "$<" $(CFLAGS) -o "$@"
090
091
092 %.o: %.S
093 $(CC) "-I$(PWD)" -c "$<" $(CFLAGS) -DASM_SOURCE=1 -o "$@"
094
095
096 clean:
097 $(RM) *.o *.a *~ $(PROGS) *.kimg *.strip
098 $(RM) .userprog*