Date: Fri, 15 Nov 2002 02:42:20 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Alfred Perlstein <bright@mu.org> Cc: Nate Lawson <nate@root.org>, hackers@FreeBSD.ORG Subject: Success! (Re: cvs commit: src/bin/sleep sleep.c) Message-ID: <200211151042.gAFAgKjP008277@apollo.backplane.com> References: <200211142257.gAEMvdxX071776@apollo.backplane.com> <Pine.BSF.4.21.0211141538440.44091-100000@root.org> <20021115004017.GE50692@elvis.mu.org>
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I have sucessfully created a mini-C-like library and
compiled /bin/sleep against it. (This is in stable,
by the way, so its still a bit bigger then it needs to be).
My minic library is:
apollo:/usr/src/lib/libminic# ls -la
total 30
drwxr-xr-x 2 root wheel 512 Nov 15 02:17 .
drwxr-xr-x 59 root wheel 1536 Nov 15 00:17 ..
-rw-r--r-- 1 root wheel 3410 Nov 15 02:16 Makefile
-rw-r--r-- 1 root wheel 2076 Nov 15 02:02 __error.c
-rw-r--r-- 1 root wheel 1812 Nov 15 00:19 __main.c
-rw-r--r-- 1 root wheel 1701 Nov 15 02:26 ctype.c
-rw-r--r-- 1 root wheel 940 Nov 15 01:58 exit.c
-rw-r--r-- 1 root wheel 192 Nov 15 01:43 minic.h
-rw-r--r-- 1 root wheel 827 Nov 15 02:01 panic.c
-rw-r--r-- 1 root wheel 7471 Nov 15 01:43 pfmt.c
-rw-r--r-- 1 root wheel 736 Nov 15 01:52 printf.c
-rw-r--r-- 1 root wheel 1336 Nov 15 01:51 sprintf.c
-rw-r--r-- 1 root wheel 1089 Nov 15 01:41 stdio.c
Not quite complete, so I haven't posted a patch set
yet. I still need to implement more dummy stdio, maybe
add some really simple buffering, and add a few more size
prefixes to pfmt, but basically that's all that I have left
to do. The Makefile does all the magic to pull in parts of
libc and libstand. The static binary for sleep is:
apollo:/usr/src/bin/sleep# ls -la obj/sleep
-rwxr-xr-x 1 root wheel 12085 Nov 15 02:26 sleep
apollo:/usr/src/bin/sleep# size obj/sleep
text data bss dec hex filename
6699 604 76 7379 1cd3 obj/sleep
The libminic shared library is also tiny, only 47K.
I expect when all is said and done it will wind up
being around 70K.
apollo:/usr/src/bin/sleep# ls -la /usr/lib/*minic*
-r--r--r-- 1 root wheel 226976 Nov 15 02:26 /usr/lib/libminic.a
lrwxr-xr-x 1 root wheel 13 Nov 15 02:26 /usr/lib/libminic.so -> libminic.so.2
-r--r--r-- 1 root wheel 47120 Nov 15 02:26 /usr/lib/libminic.so.2
The only thing I need to deal with is how to construct
the link line without libc and with all the proper crt's.
I could use some help there.
Here is the nm output for the sleep binary.
-Matt
w _DYNAMIC
w __deregister_frame_info
w __register_frame_info
080480ac ? _init
080480b8 T _start
0804813c t __do_global_dtors_aux
0804813c t gcc2_compiled.
08048190 t fini_dummy
08048198 t frame_dummy
080481bc t init_dummy
080481c4 T main
080481c4 t gcc2_compiled.
08048314 T usage
08048338 T strtol
080484d8 T getopt
08048654 T __maskrune
080486c4 T __isctype
080486e0 T atexit
08048710 T exit
08048734 T __exit
08048734 W _exit
08048748 T _nanosleep
08048748 W nanosleep
08048754 T strchr
08048770 T malloc
08048804 T free
08048864 T calloc
080488a8 T realloc
0804890c T reallocf
08048938 T mallocstats
08048960 T znalloc
080489d0 T zfree
08048ac4 T zextendPool
08048b10 T zallocstats
08048b84 T panic
08048bbc T printf
08048bd0 T vprintf
08048bec T __srget
08048c30 T __swbuf
08048c60 T putchar
08048c68 T fwrite
08048c9c T fprintf
08048cb8 T bzero
08048d18 T bcopy
08048df0 T sbrk
08048e1c T .cerror
08048e30 T __pfmt
08049454 T strcpy
08049478 T memset
080494f8 T __error_unthreaded
080494f8 W __error
0804950c T _write
0804950c W write
08049520 T _read
08049520 W read
0804952c t __do_global_ctors_aux
0804952c t gcc2_compiled.
08049554 t init_dummy
0804955c ? _fini
080495a0 r copyright
08049620 r rcsid
0804aae0 D __progname
0804aae4 d p.3
0804aae8 d completed.4
0804aaec D opterr
0804aaec d force_to_data
0804aaf0 D optind
0804ab00 D QCharAry
0804ac00 D __sF
0804ad08 D __stdinp
0804ad0c D __stdoutp
0804ad10 D __stderrp
0804ad20 D .minbrk
0804ad24 D .curbrk
0804ad28 ? __EH_FRAME_BEGIN__
0804ad28 ? __FRAME_END__
0804ad28 d force_to_data
0804ad2c ? __CTOR_LIST__
0804ad30 ? __CTOR_END__
0804ad34 ? __DTOR_LIST__
0804ad38 ? __DTOR_END__
0804ad3c A __bss_start
0804ad3c A _edata
0804ad3c b object.11
0804ad74 B environ
0804ad78 B optarg
0804ad7c B optreset
0804ad80 B optopt
0804ad84 B errno
0804ad88 A _end
0804ad88 A end
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