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This is a userland Mach-O loader for linux.
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* Usage
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% make release
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% ./ld-mac mac_binary [options...]
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You need OpenCFLite (http://sourceforge.net/projects/opencflite/)
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installed if you want to run some programs such as dsymutil.
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opencflite-476.17.2 is recommended.
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* How to use compiler tool chains of Xcode
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Get xcode_3.2.6_and_ios_sdk_4.3__final.dmg (or another xcode package).
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% git clone git@github.com:shinh/maloader.git
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% ./maloader/unpack_xcode.sh xcode_3.2.6_and_ios_sdk_4.3__final.dmg
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% sudo cp -a xcode_3.2.6_and_ios_sdk_4.3__final/root /usr/i686-apple-darwin10
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% cd maloader
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% make release
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% ./ld-mac /usr/i686-apple-darwin10/usr/bin/gcc mach/hello.c
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% ./ld-mac a.out
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* How to run Mach-O binaries using binfmt_misc
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% ./binfmt_misc.sh
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% /usr/i686-apple-darwin10/usr/bin/gcc mach/hello.c
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% ./a.out
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To remove the entries, run the following command:
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% ./binfmt_misc.sh stop
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* How to try 32bit support
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% make clean
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% make all BITS=32
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If you see permission errors like
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ld-mac: ./mach/hello.c.bin mmap(file) failed: Operation not permitted
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you should run the following command to allow users to mmap files to
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addresses less than 0x10000.
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% sudo sh -c 'echo 4096 > /proc/sys/vm/mmap_min_addr'
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Or, running ld-mac as a super user would also work.
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* How to run both 64bit Mach-O and 32bit Mach-O binaries
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% make both
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% ./binfmt_misc.sh start `pwd`/ld-mac.sh
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% /usr/i686-apple-darwin10/usr/bin/gcc -arch i386 mach/hello.c -o hello32
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% /usr/i686-apple-darwin10/usr/bin/gcc -arch x86_64 mach/hello.c -o hello64
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% /usr/i686-apple-darwin10/usr/bin/gcc -arch i386 -arch x86_64 mach/hello.c -o hello
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% ./hello32
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Hello, 32bit world!
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% ./hello64
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Hello, 64bit world!
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% ./hello
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Hello, 64bit world!
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% LD_MAC_BITS=32 ./hello
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Hello, 32bit world!
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* Which programs should work
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OK
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- gcc-4.2 (link with -g requires OpenCFLite)
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- otool
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- nm
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- dyldinfo
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- dwarfdump
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- strip
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- size
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- dsymutil (need OpenCFLite)
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- cpp-4.2
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- clang
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-- clang-70 (xcode 3.2.6): OK, but linking wasn't checked due to lack of sysroot
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-- clang-137 (xcode 4.0): OK
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not OK
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- llvm-gcc
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- gnumake and bsdmake
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- lex and flex
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- ar
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- m4
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- gdb
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- libtool
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- nasm and ndisasm (i386)
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- mpicc, mpicxx, and mpic++
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This is a userspace compatibility layer for runniing Darwin/OS X binaries on Linux.
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For more information, visit http://darling.dolezel.info
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* Notice
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- Running all Mac binaries isn't my goal. Only command line tools such
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as compiler tool chain can be executed by this loader.
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- A slide about this: http://shinh.skr.jp/slide/ldmac/000.html
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* TODO
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- read dwarf for better backtracing
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- make llvm-gcc work
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- make ld in xcode4 work
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- improve 32bit support
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- handle dwarf and C++ exception
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* License
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Simplified BSD License.
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Note that all files in "include" directory and some files in "libmac"
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were copied from Apple's Libc-594.9.1.
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http://www.opensource.apple.com/release/mac-os-x-1064/