Annotation of dietlibc/CHANGES, revision 1.113
1.74 fefe 1: 0.10:
2: update getpagesize.
3: add personality.
1.75 fefe 4: add "%*s" and "%*.*s" support to vsnprintf.
1.76 fefe 5: add putchar (apparently arm-linux-gcc will substitute printf("\n")
6: with putchar('\n') behind your back...?!
1.77 fefe 7: import include/scsi/ from glibc.
1.78 fefe 8: add iopl.
1.80 fefe 9: add execl and sigdelset prototypes.
10: add getopt_long stuff to getopt.h (may compile but won't link).
1.81 fefe 11: add RPC headers (no code yet).
1.82 fefe 12: add mlockall, munlockall
1.83 fefe 13: make "diet gcc foo.c" work.
14: added Sun RPC code and removed as many warnings as possible in a
15: heroic act of self-mutilation.
16: added getproto* and getdtablesize for the RPC cruft :-(
1.84 fefe 17: added getpass. mount from util-linux actually compiles now!
18: fix the sig*set routines. mount actually works now *bg*
19: fix fwrite dividing by zero when trying to fwrite n records of size 0.
1.85 fefe 20: added an initial regex implementation (3500 bytes!!!).
1.87 fefe 21: add llseek and lseek64 with optional lseek fall-back.
1.88 fefe 22: add res_init.
23: add asprintf (ugh, what an ugly function).
1.89 fefe 24: expanded arpa/nameser.h to include backwards compatibility defines
1.90 fefe 25: add ut_name alias to ut_host in struct utmp.
26: add inet_ntop, inet_pton, gethostbyname2.
1.92 fefe 27: add sysinfo, recvmsg, sendmsg.
1.93 fefe 28: add endmntent, getmntent, setmntent.
1.94 fefe 29: fix fnmatch (thanks, Guillaume Cottenceau!)
1.96 fefe 30: add setenv.
31: remove __restrict from mntent.h, add __restrict__ removal alias for
32: older gcc versions in sys/cdefs.h.
33: add rlim_t, sig_atomic_t declarations.
34: add sigsetjmp #define for __sigsetjmp (oops).
35: (Thanks to Chris Siebenmann for these three bug reports)
1.97 fefe 36: add a gruesome hack to printf floating point to accept %f and kludge
37: together support for %.2f. Don't look at the code, please!
1.98 fefe 38: fixed tcsetpgrp (oops, this is embarassing! Thanks, Chris Siebenmann)
1.99 fefe 39: imported fix for entlib by Jeff Garzik.
1.100 fefe 40: add glob implementation from Guillaume Cottenceau (Thanks!!)
41: add libdl fragments from Olaf (Yeah! One step closer to dynamic linking!)
1.101 fefe 42: add REG_ICASE and word start/end handling to my regular expressions.
43: my regular expressions now actually match substrings (i.e. "foobar" to "bar").
1.102 fefe 44: wrap getcwd to comply to man page (the syscall returns the number of
45: bytes, not the buffer)
46: add realpath.
1.103 fefe 47: fix vfprintf.
1.104 fefe 48: fix *scanf %s zero termination.
49: add abs, labs, llabs.
1.105 fefe 50: add <sys/io.h>, ioperm syscall.
51: add flock to <sys/file.h>
1.106 fefe 52: fixes to bsearch and the regular expressions.
1.107 fefe 53: add fake herror.
1.108 fefe 54: add scandir and alphasort.
1.109 fefe 55: add killpg
1.110 fefe 56: implemented a gross hack to make libpthread compile when
57: dietfeatures.h does not define WANT_THREAD_SAFE (it's empty then).
1.111 fefe 58: add getaddrinfo and freeaddrinfo (man, what a fucked up interface!)
1.112 fefe 59: fix sigsuspend (syscall had completely fscked up arguments!)
1.113 ! fefe 60: RLIM_INFINITY from the kernel is broken. Thanks to Chris Siebenmann
! 61: for sending a patch.
1.74 fefe 62:
1.73 fefe 63: 0.9:
1.65 fefe 64: fixed initgroups (oops)
1.66 fefe 65: Cleanup appending file open for stdio (thanks, James Antill)
66: imported vfprintf fix from James Antill.
1.67 fefe 67: add fnmatch
68: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 69: Olaf added character classes to *scanf.
1.69 fefe 70: Put object and library files into a separate directory (bin-$ARCH).
71: Add "cross" make target to make all architectures.
72: Add "diet" program and man page.
1.70 fefe 73: Add getgrnam, getgrgid
1.71 fefe 74: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 75: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 76:
1.64 fefe 77: 0.8:
1.34 fefe 78: vsnprintf(0,...) estimated the length of strings with a padding width
79: incorrectly.
1.35 fefe 80: new reboot() from Olaf.
1.36 fefe 81: added prototypes for getsockopt and setsockopt.
1.39 fefe 82: added experimental sem* and shm*
1.38 fefe 83: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 84: added setvbuf (only changes mode, not buffer)
1.41 fefe 85: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
86: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 87: added qsort() and bsearch(). Benchmark on 1000 random ints:
88: glibc: 679414 cycles qsort and 3352 cycles bsearch
89: diet libc: 300010 cycles qsort, 553 cycles bsearch
90: I have no idea why glibc is so slow.
1.43 fefe 91: added __isnan (references by libm.a from glibc).
92: added popen() and pclose(). Now the diet libc can link slsh (from
93: S-Lang!)
1.44 fefe 94: corrected usleep. It was more of an msleep until now.
1.45 fefe 95: corrected __dtostr (it looped when trying to format "0.0").
96: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 97: added ungetc (does it work?)
1.47 fefe 98: added inet_aton (yuck!)
1.50 fefe 99: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 100: added h_errno and __h_errno_location
101: added inet_ntoa
1.49 fefe 102: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 103: add bcopy, index, rindex macros
104: add isgraph and isxdigit
1.52 fefe 105: add strftime (ugh!!!)
1.53 olaf 106: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 107: Jeff Garzik contributed a spec file. I put it in contrib and hope
108: everbody knows what to do with it...
109: Olaf checked in a ton of libpthread stuff.
1.55 fefe 110: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 111: add large file backwards compatibility support (so gzip will run on
112: kernel 2.2 and 2.0)
1.57 fefe 113: added shutdown
1.58 fefe 114: added nice
115: added pseudo-locale support for is* (they are now weak aliases,
116: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
117: overwrite the default is* functions.
1.59 fefe 118: added liblatin1.a
1.60 fefe 119: added tzfile implementation (does it work for anyone else?)
1.61 fefe 120: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 121: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
122: Thanks!
1.63 fefe 123: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 124:
1.21 fefe 125: 0.7.2:
126: added several prototypes to already implemented functions and
127: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 128: added prototypes for process group and dup syscalls. Thanks to
129: Abraham again. He also contributed an implementation for daemon(),
130: an ugly BSD hack. I decided to diversify the lib/ directory a
131: little and now created a libugly/ directory for stuff like system()
132: and daemon() ;-)
133: added libstdio and moved all that stdio crap from lib/ there. The
134: idea is to start separating now what we will separate for shared
135: libraries anyway.
1.26 fefe 136: optimized x86 unified-syscall by Olaf.
1.27 fefe 137: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
138: limits.h instead)
139: added remove.c and enough cruft to limits.h to make it compile lzo,
140: lzop and bzip2.
1.28 fefe 141: added mktime, asctime_r, asctime and ctime (needed for gzip).
142: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 143: format some day (man tzfile, ugh!) :-(
1.29 fefe 144: added unlink prototype to unistd.h.
145: added gmtime and gmtime_r.
1.31 fefe 146: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 147: removed readdir glibc compatibility cruft.
1.31 fefe 148: removed stat glibc compatibility cruft.
1.32 fefe 149: oops, my fread was broken for pipes.
1.33 fefe 150: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 151:
1.9 fefe 152: 0.7.1:
1.11 fefe 153: optimized away the static arrays from __ltostr and __lltostr.
154: optimized away the static arrays (and more!) from strtoul and strtoull.
155: added system (by Olaf).
1.12 fefe 156: added tolower and toupper
1.13 fefe 157: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 158: added clone for mips (by Olaf).
159: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 160: added pause for all (by Olaf).
1.17 fefe 161: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 162: added isupper and islower.
163: added putc and putchar as macros.
1.17 fefe 164: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
165: insightful discussions and patches I partially used for the last three)
1.18 fefe 166: added getpriority and setpriority (also by Abraham)
1.19 fefe 167: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 168: oi, setjmp and longjmp were broken on other platforms, too!
169: Thanks to Sébastien Côté for reporting this.
1.9 fefe 170:
171: 0.7:
1.6 olaf 172: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 173: Initial dynamic loading glue for i386, also by Olaf.
174: We don't have a dynamic loader yet, so this is not yet usable.
175: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
176: vsprintf, writev, all by Olaf.
1.2 fefe 177: imported readdir fix from Guillaume. Mhh, can the kernel interface
178: really be this broken?
1.3 fefe 179: Found a kludgy way to detect whether the kernel includes define struct
180: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
181: not work for you, please tell me!
1.4 fefe 182: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 183: Fixed stdio line buffering. The code was already there but I forgot
184: to mark stdio and stdout as line buffered. This should really be
185: done dynamically using isatty, though.
1.8 fefe 186: Removed superfluous "if (1)" in execvp.c
1.1 cvs 187:
188: 0.6.14:
189: *scanf did not append the 0 byte for %s.
190: added creat and changed creat to call open directly instead of open64.
191: did for fread what 0.6.10 did for fwrite.
192: repaired buffered stdio a little (line buffering is still not
193: supported).
194: [All of these bugs have been reported by Guillaume. Thanks!]
195: added __pure__ to strchr and strrchr in <string.h>
196:
197: 0.6.13:
198: included COPYING to make clear that the diet libc is covered by the
199: GNU General Public License (and _not_ the LGPL). That means that
200: you need to obtain a license from me if you want to use the diet
201: libc in a proprietary program that you want to distribute.
202: The x86 unified syscall swapped arguments #4 and #5 and noone
203: noticed until now! Thanks to Guillaume Cottenceau for reporting
204: this!
205: The malloc had a subtle bug with small allocations that could cause
206: segfault. Guillaume reported it, Olaf fixed it.
207:
208: 0.6.12:
209: added assert, statfs and fstatfs
210: added include/net/if.h so fget compiles again.
211:
212: 0.6.11:
213: added putenv.
214:
215: 0.6.10:
216: fixed fwrite. It returned the number of bytes written, not the number
217: of records. Thanks to Albert D. Cahalan for pointing this out.
218: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
219: added brk and sbrk. harold@nb.com.sg made me do it.
220:
221: 0.6.9:
222: fixed execvp not to return on ENOENT
223: did for {open|read|close|seek|tell}dir what I did for stat before.
224: The glibc compatibility part is currently non-functional.
225: fixed white space handling in sscanf " (" would not match " (".
226: fixed printf to accept 'l' flag.
227: fixed getpwuid (ignored last line)
228:
229: 0.6.8:
230: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
231: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
232: added strlcpy and strlcat from OpenBSD.
233: added stat64, fstat64 and lstat64.
234: added endian.h and made ending of strlen.c endianness-aware
235: added string routines size tweak to dietfeatures.h. Most of the
236: string routines have been unrolled. This is up to three times as
237: fast but creates up to three times larger code. Now you can disable
238: the unrolling.
239: added sendfile.
240: I also added pread. It works on x86 and sparc but not on ppc and mips.
241: I have no idea what's going on. strace disagrees with the kernel.
242: Can anyone help? I asked the Linux kernel mailing list for help, too.
243: added a few aliases of the type __libc_open for open. nm on
244: libpthreads.so indicates that we will need them.
245:
246: 0.6.7:
247: the sources now compile without warnings with -Wall.
248: printf now prints "(null)" when %s is passed NULL. This can be
249: removed with WANT_NULL_PRINTF in dietfeatures.h
250: added vfprintf, execl, ttyname.
251: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
252: __dietfstat so they can use the normal kernel struct stat.
253: stat, lstat and fstat are now C wrappers that convert to the glibc
254: struct stat. So we can avoid that overhead for programs that use
255: dietlibc headers.
256:
257: 0.6.6:
258: changed the Makefiles so you can now set CFLAGS on the command line
259: added memccmp (analogous to memccpy) and strncmp.
260: Olaf fixed another bug in the sparc unified syscall.
261: Paul Clifford contributed a C version of his strlen.S that is much
262: more efficient than the previous strlen on all platforms! It also
263: looks like technology from Roswell. ;-}
264: added a "real" stdio. Well, almost. Please contribute!
265: added dietfeatures.h so you can remove features you don't need.
266: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
267: stdio now works with simple programs and minigzip from libz.
268: stdio uses some major trickery to avoid linking the stdio, stderr and
269: stdout (and reserving space for them) when they are not used.
270:
271: 0.6.5:
272: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
273: most of them bugs in the new header files, but also missing sigset
274: functions.
275: Paul Clifford contributed an assembly strlen.S for ARM and fixed
276: several bugs.
277: Fixed ppc/setjmp and mips/pipe.
278: Olaf contributed a new sparc unified syscall.
279:
280: 0.6.4:
281: declared is* static inline in getservent.
282: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
283: changed strlen to return 0 when passed NULL.
284: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
285: Scientist who actually implemented this without access to a MIPS
286: box, just from reading the architecture manual. And it worked out
287: of the box.
288: started a set of system includes, mainly so that I can use lcc and
289: my alpha-linux cross compiler (which is unable to cross-compile
290: glibc). diet libc can now be compiled without any include files
291: from a normal libc. The includes do declare more than diet libc
292: currently delivers and they are still far from complete for real
293: applications.
294: I will only add assembly versions that are smaller _and_ faster than
295: the C version. Larger routines are only accepted if they are called
296: very often and are substantially faster.
297: added i386 assembly strchr, which is smaller and faster than the old
298: version. It is, however, larger than the version contributed by
299: proton (thanks, anyway).
300: added i386 strlen (31% faster, 14% smaller)
301: "make t" will now create a map file called "mapfile".
302:
303: 0.6.3:
304: added sys_errlist, strerror and perror
305: added isblank
306: added atol
307:
308: 0.6.2:
309: mmap for ARM didn't compile. Thanks, Paul!
310:
311: 0.6.1:
312: split mmap into the architecture specific subdirectories.
313: getenv now copes with environ==NULL, thanks Paul Clifford.
314: Paul also contributed a smaller ARM startup code.
315:
316: 0.6:
317: strcat returned the wrong result. Thanks, Dietz Pröpper.
318: strtod now understands a negative exponent (oops, thanks Bertram Barth)
319: Port to arm-linux-gnu, but on the Netwinder I use for testing the
320: __dtostr does not work (I have no idea why!)
321: The MIPS port now uses (much smaller) non-PIC code. That means that
322: the applications you link against diet libc also have to be compiled
323: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
324: Thanks to Ralf Bächle for helping me with this!
325: I made subdirectories for the architectures and use VPATH to override
326: VPATH so that make finds the source file automatically. That should
327: simplify the sources greatly.
328: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
329: ARM and MIPS now also have setjmp and longjmp
330: "compile" and "load" are now make targets. Use them for djb programs.
331: added contrib/elftrunc.c which will remove unnecessary ELF headers.
332: Again, contributed from Olaf. Great work!
333:
334: 0.5.12:
335: printf also does signed numbers.
336: If you don't use atexit, dietlibc now does not link exit, only _exit.
337: *printf now correctly returns the number of bytes written.
338: Olaf contributed experimental sscanf and vsscanf implementations.
339: If passed NULL as buffer, snprintf will not write anything but still
340: return the number of bytes it would have written.
341: Initial MIPS port! (Oh, the agony!)
342: No setjmp and longjmp support yet! Please contribute!
343: I even implemented unified syscalls for MIPS. Still, MIPS code is
344: almost twice the size of SPARC code. If anyone knows why: please
345: tell me!
346:
347: 0.5.11:
348: I implemented new unified syscalls for x86, sparc and ppc, this time based
349: on .s files and not .c files, and I moved the syscalls into
350: subdirectores to clean the dietlibc sources up a little.
351: A binary consisting of printf("%s is %d\n","olaf",23) is now
352: 2864 bytes on sparc
353: 2488 bytes on intel
354: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
355: to make a few more applications work.
356: Olaf Dreesen also implemented some unified syscall stuff for x86.
357: He discovered that with our unified syscall interface it actually
358: costs <10 bytes total to make all system calls thread safe!
359: I implemented atexit() (can register up to 4 callbacks).
360: I implemented strtod and __dtostr (the opposite). Now we can add
361: floating point support to vsnprintf and sscanf!
362:
363: 0.5.10:
364: I actually saw that I can not only merge the errno handling code of
365: the system calls on x86, I can also merge the rest (including the
366: arguments) except for setting the system call number. All those
367: system calls are now just a jump to a unified system call handler.
368: I got rid of x86openclose again. The savings are substantial:
369: chown from embutils went from 7664 to 7184 bytes!
370: If I'd move the system call wrappers to assembly language, I could
371: even reduce the alignment (does not matter since it's just a jump
372: anyway) and get rid of the "ret" behind each jump (one byte per
373: system call!)
374:
375: 0.5.9:
376: added memchr, strpbrk, strstr, strtol, isspace (hehe)
377: fixed strdup
378: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
379: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
380: (no signed integers, only strings and unsigned integers (but
381: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
382: that code must be wonderful, I don't understand it at all *bg*)
383: Olaf's printf does understand padding like in "%08d" and "%8d" and
384: automatically pads pointers with '0'.
385: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
386: Thanks to proton for inspiration on this.
387: The new x86 start code also does not reference exit any more, thus saving
388: 64 bytes for executables that don't call exit explicitly.
389: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
390: Moved errno and environ to start.S, saving no byte binary size but
391: speeding up compilation and slightly shortening dietlibc.a ;-)
392: For x86: joined open and close into one assembler file, sharing the
393: errno handling. This is a feasibility test and it actually saves a
394: few bytes. I think I will reimplement the _syscall[1-6] macros on
395: all platforms now to share the errno handling code for them.
396:
397: 0.5.8:
398: fixed strchr to be able to look for 0.
399:
400: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
401: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
402: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
403: contributed by Olaf Dreesen)
404:
405: added execvp, getcwd
406:
407: fixed __xmknod
408:
409: Note: can it be that the ftw interface really is so broken that I
410: cannot implement it without having to implement some searching data
411: structure? I included an experimental ftw implementation that will
412: not follow symlinks.
413:
414: 0.5.7:
415: oops, if_nametoindex was broken!
416:
417: 0.5.6:
418: ported to ppc-linux.
419: fixed i386 sigsetjmp (I mistyped the function name)
420: included sigjmp.c
421:
422: 0.5.5:
423: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
424: actually, it wasn't fork that wasn't working for sparc, it was pipe.
425: I fixed it now.
426: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
427: fixed readdir to use getdents and not the intel inline asm
428:
429: 0.5.4:
430: ported to sparclinux (sparc32 only). Beware: does not work yet.
431: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
432:
433: 0.5.3:
434: added tcsetattr and getenv to compile e3
435:
436: 0.5.2:
437: added vhangup, tcgetattr, isatty and memcmp for fgetty
438: (http://www.fefe.de/fgetty/)
439: added localtime from uC-libc.
440:
441: 0.5.1:
442: stat and friends actually work now. Yuck! Another case of
443: translation between kernel and userland. Why can't the kernel
444: people and the libc people simply agree on a standard?
445: removed many unnecessary includes to speed up compilation.
446: added -fomit-frame-pointer and i386 compilation target to reduce code size.
447: inlined socketcall to reduce code size.
448: "load" and "compile" are examples for djb code.
449:
450: 0.5:
451: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
452: each object file is now treated with "strip -x -R .note -R .comment"
453: split each system call into a separate object file
454: added ntohs, htons, alarm, if_indextoname and if_nametoindex
455:
456: 0.4.1:
457: oops, the strchr implementation was wrong. Thanks Jens Laas!
458:
459: 0.4:
460: copied opendir and friends from uC-libc.
461: added getservent and getservby* in gerservent.c
462:
463: 0.3:
464: remove readdir system call
465: added getdents system call
466: added getpwnam/getpwuid implementation in getpwnam.c
467: added a few string functions (in str*.c)
468:
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