Compiling Xv6 on Mac OS X
First, to download the source code of xv6(x86 version 6, which is a re-implementation of Unix version 6) by following command：
$ git clone git://pdos.csail.mit.edu/xv6/xv6.git
Now, to prepare the toolchain and build it, then compling xv6.
$ wget -c http://ftpmirror.gnu.org/binutils/binutils-2.21.1.tar.bz2
$ wget -c http://ftpmirror.gnu.org/gcc/gcc-4.5.1/gcc-core-4.5.1.tar.bz2
$ wget -c http://ftpmirror.gnu.org/gdb/gdb-6.8a.tar.gz
$ tar jxvf binutils-2.21.1.tar.bz2 && cd binutils-2.21.1
$ ./configure --target=i386-jos-elf --disable-nls && make && sudo make install
$ cd../ && tar jxvf gcc-core-4.5.1.tar.bz2 && cd gcc-4.5.1 && mkdir build && cd build && ../configure --with-gmp=/opt/local --with-mpfr=/opt/local --with-mpc=/opt/local --target=i386-jos-elf --disable-nls --without-headers --with-newlib --disable-threads --disable-shared --disable-libmudflap --disable-libssp && time make
then you should(or maybe) get the following error message：
⋯
Undefined symbols for architecture x86_64:
"_iconv", referenced from:
_convert_using_iconv in libcpp.a(charset.o)
(maybe you meant: __cpp_destroy_iconv, _cpp_init_iconv )
"_iconv_close", referenced from:
__cpp_destroy_iconv in libcpp.a(charset.o)
__cpp_convert_input in libcpp.a(charset.o)
"_iconv_open", referenced from:
_init_iconv_desc in libcpp.a(charset.o)
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make[2]: *** [cc1-dummy] Error 1
make[2]: Leaving directory `/Users/jackie/test/opensource/xv6/resources/gcc-4.5.1/host-x86_64-apple-darwin12.3.0/gcc'
make[1]: *** [all-gcc] Error 2
make[1]: Leaving directory `/Users/jackie/test/opensource/xv6/resources/gcc-4.5.1'
make: *** [all] Error 2
real 9m36.001s
user 7m0.802s
sys 1m0.791s
To fix this issue，you should to modify these files 「./intl/loadmsgcat.c」、「./libcpp/charset.c」 and 「./gcc/pretty-print.c」. To replace the 「iconv()／iconv_open()／iconv_close()」 functions by 「libiconv()／libiconv_open()／libiconv_close()」 in these c files then compiling again.
$ make && sudo make install
$ cd../ && tar zxvf gdb-6.8a.tar.gz && cd gdb-6.8
$ ./configure --target=i386-jos-elf --program-prefix=i386-jos-elf- --disable-werror && make && sudo make install
After finish building tool-chain, you can compilg xv6 now...
$ cd../ && make TOOLPREFIX=i386-jos-elf-
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -fno-pic -O -nostdinc -I. -c bootmain.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -fno-pic -nostdinc -I. -c bootasm.S
i386-jos-elf-ld -m elf_i386 -N -e start -Ttext 0x7C00 -o bootblock.o bootasm.o bootmain.o
i386-jos-elf-objdump -S bootblock.o > bootblock.asm
i386-jos-elf-objcopy -S -O binary -j .text bootblock.o bootblock
./sign.pl bootblock
boot block is 429 bytes (max 510)
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o bio.o bio.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o console.o console.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o exec.o exec.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o file.o file.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o fs.o fs.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o ide.o ide.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o ioapic.o ioapic.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o kalloc.o kalloc.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o kbd.o kbd.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o lapic.o lapic.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o log.o log.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o main.o main.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o mp.o mp.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o picirq.o picirq.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o pipe.o pipe.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o proc.o proc.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o spinlock.o spinlock.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o string.o string.c
i386-jos-elf-gcc -m32 -gdwarf-2 -Wa,-divide -c -o swtch.o swtch.S
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o syscall.o syscall.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o sysfile.o sysfile.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o sysproc.o sysproc.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o timer.o timer.c
i386-jos-elf-gcc -m32 -gdwarf-2 -Wa,-divide -c -o trapasm.o trapasm.S
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o trap.o trap.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o uart.o uart.c
perl vectors.pl > vectors.S
i386-jos-elf-gcc -m32 -gdwarf-2 -Wa,-divide -c -o vectors.o vectors.S
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o vm.o vm.c
i386-jos-elf-gcc -m32 -gdwarf-2 -Wa,-divide -c -o entry.o entry.S
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -fno-pic -nostdinc -I. -c entryother.S
i386-jos-elf-ld -m elf_i386 -N -e start -Ttext 0x7000 -o bootblockother.o entryother.o
i386-jos-elf-objcopy -S -O binary -j .text bootblockother.o entryother
i386-jos-elf-objdump -S bootblockother.o > entryother.asm
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -nostdinc -I. -c initcode.S
i386-jos-elf-ld -m elf_i386 -N -e start -Ttext 0 -o initcode.out initcode.o
i386-jos-elf-objcopy -S -O binary initcode.out initcode
i386-jos-elf-objdump -S initcode.o > initcode.asm
i386-jos-elf-ld -m elf_i386 -T kernel.ld -o kernel entry.o bio.o console.o exec.o file.o fs.o ide.o ioapic.o kalloc.o kbd.o lapic.o log.o main.o mp.o picirq.o pipe.o proc.o spinlock.o string.o swtch.o syscall.o sysfile.o sysproc.o timer.o trapasm.o trap.o uart.o vectors.o vm.o -b binary initcode entryother
i386-jos-elf-objdump -S kernel > kernel.asm
i386-jos-elf-objdump -t kernel | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > kernel.sym
gcc -m32 -Werror -Wall -o mkfs mkfs.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o ulib.o ulib.c
i386-jos-elf-gcc -m32 -gdwarf-2 -Wa,-divide -c -o usys.o usys.S
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o printf.o printf.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o umalloc.o umalloc.c
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o cat.o cat.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _cat cat.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _cat > cat.asm
i386-jos-elf-objdump -t _cat | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > cat.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o echo.o echo.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _echo echo.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _echo > echo.asm
i386-jos-elf-objdump -t _echo | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > echo.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o forktest.o forktest.c
# forktest has less library code linked in - needs to be small
# in order to be able to max out the proc table.
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _forktest forktest.o ulib.o usys.o
i386-jos-elf-objdump -S _forktest > forktest.asm
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o grep.o grep.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _grep grep.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _grep > grep.asm
i386-jos-elf-objdump -t _grep | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > grep.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o init.o init.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _init init.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _init > init.asm
i386-jos-elf-objdump -t _init | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > init.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o kill.o kill.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _kill kill.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _kill > kill.asm
i386-jos-elf-objdump -t _kill | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > kill.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o ln.o ln.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _ln ln.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _ln > ln.asm
i386-jos-elf-objdump -t _ln | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > ln.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o ls.o ls.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _ls ls.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _ls > ls.asm
i386-jos-elf-objdump -t _ls | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > ls.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o mkdir.o mkdir.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _mkdir mkdir.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _mkdir > mkdir.asm
i386-jos-elf-objdump -t _mkdir | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > mkdir.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o rm.o rm.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _rm rm.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _rm > rm.asm
i386-jos-elf-objdump -t _rm | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > rm.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o sh.o sh.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _sh sh.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _sh > sh.asm
i386-jos-elf-objdump -t _sh | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > sh.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o stressfs.o stressfs.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _stressfs stressfs.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _stressfs > stressfs.asm
i386-jos-elf-objdump -t _stressfs | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > stressfs.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o usertests.o usertests.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _usertests usertests.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _usertests > usertests.asm
i386-jos-elf-objdump -t _usertests | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > usertests.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o wc.o wc.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _wc wc.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _wc > wc.asm
i386-jos-elf-objdump -t _wc | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > wc.sym
i386-jos-elf-gcc -fno-pic -static -fno-builtin -fno-strict-aliasing -Wall -MD -ggdb -m32 -Werror -fno-omit-frame-pointer -fno-stack-protector -c -o zombie.o zombie.c
i386-jos-elf-ld -m elf_i386 -N -e main -Ttext 0 -o _zombie zombie.o ulib.o usys.o printf.o umalloc.o
i386-jos-elf-objdump -S _zombie > zombie.asm
i386-jos-elf-objdump -t _zombie | sed '1,/SYMBOL TABLE/d; s/ .* / /; /^$/d' > zombie.sym
./mkfs fs.img README _cat _echo _forktest _grep _init _kill _ln _ls _mkdir _rm _sh _stressfs _usertests _wc _zombie
used 29 (bit 1 ninode 26) free 29 log 10 total 1024
balloc: first 447 blocks have been allocated
balloc: write bitmap block at sector 28
dd if=/dev/zero of=xv6.img count=10000
10000+0 records in
10000+0 records out
5120000 bytes (5.1 MB) copied, 0.047726 s, 107 MB/s
dd if=bootblock of=xv6.img conv=notrunc
1+0 records in
1+0 records out
512 bytes (512 B) copied, 7.2e-05 s, 7.1 MB/s
dd if=kernel of=xv6.img seek=1 conv=notrunc
306+1 records in
306+1 records out
156849 bytes (157 kB) copied, 0.001244 s, 126 MB/s
rm wc.o grep.o mkdir.o rm.o ln.o stressfs.o kill.o echo.o init.o usertests.o zombie.o cat.o sh.o ls.o
$
It's done.
You can also using Makefile or shell script only to build the tool-chain without do anything by manual.
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