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