Annotation of dietlibc/CHANGES, revision 1.60
1.34 fefe 1: 0.7.3:
2: vsnprintf(0,...) estimated the length of strings with a padding width
3: incorrectly.
1.35 fefe 4: new reboot() from Olaf.
1.36 fefe 5: added prototypes for getsockopt and setsockopt.
1.39 fefe 6: added experimental sem* and shm*
1.38 fefe 7: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 8: added setvbuf (only changes mode, not buffer)
1.41 fefe 9: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
10: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 11: added qsort() and bsearch(). Benchmark on 1000 random ints:
12: glibc: 679414 cycles qsort and 3352 cycles bsearch
13: diet libc: 300010 cycles qsort, 553 cycles bsearch
14: I have no idea why glibc is so slow.
1.43 fefe 15: added __isnan (references by libm.a from glibc).
16: added popen() and pclose(). Now the diet libc can link slsh (from
17: S-Lang!)
1.44 fefe 18: corrected usleep. It was more of an msleep until now.
1.45 fefe 19: corrected __dtostr (it looped when trying to format "0.0").
20: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 21: added ungetc (does it work?)
1.47 fefe 22: added inet_aton (yuck!)
1.50 fefe 23: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 24: added h_errno and __h_errno_location
25: added inet_ntoa
1.49 fefe 26: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 27: add bcopy, index, rindex macros
28: add isgraph and isxdigit
1.52 fefe 29: add strftime (ugh!!!)
1.53 olaf 30: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 31: Jeff Garzik contributed a spec file. I put it in contrib and hope
32: everbody knows what to do with it...
33: Olaf checked in a ton of libpthread stuff.
1.55 fefe 34: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 35: add large file backwards compatibility support (so gzip will run on
36: kernel 2.2 and 2.0)
1.57 fefe 37: added shutdown
1.58 fefe 38: added nice
39: added pseudo-locale support for is* (they are now weak aliases,
40: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
41: overwrite the default is* functions.
1.59 fefe 42: added liblatin1.a
1.60 ! fefe 43: added tzfile implementation (does it work for anyone else?)
1.34 fefe 44:
1.21 fefe 45: 0.7.2:
46: added several prototypes to already implemented functions and
47: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 48: added prototypes for process group and dup syscalls. Thanks to
49: Abraham again. He also contributed an implementation for daemon(),
50: an ugly BSD hack. I decided to diversify the lib/ directory a
51: little and now created a libugly/ directory for stuff like system()
52: and daemon() ;-)
53: added libstdio and moved all that stdio crap from lib/ there. The
54: idea is to start separating now what we will separate for shared
55: libraries anyway.
1.26 fefe 56: optimized x86 unified-syscall by Olaf.
1.27 fefe 57: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
58: limits.h instead)
59: added remove.c and enough cruft to limits.h to make it compile lzo,
60: lzop and bzip2.
1.28 fefe 61: added mktime, asctime_r, asctime and ctime (needed for gzip).
62: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 63: format some day (man tzfile, ugh!) :-(
1.29 fefe 64: added unlink prototype to unistd.h.
65: added gmtime and gmtime_r.
1.31 fefe 66: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 67: removed readdir glibc compatibility cruft.
1.31 fefe 68: removed stat glibc compatibility cruft.
1.32 fefe 69: oops, my fread was broken for pipes.
1.33 fefe 70: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 71:
1.9 fefe 72: 0.7.1:
1.11 fefe 73: optimized away the static arrays from __ltostr and __lltostr.
74: optimized away the static arrays (and more!) from strtoul and strtoull.
75: added system (by Olaf).
1.12 fefe 76: added tolower and toupper
1.13 fefe 77: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 78: added clone for mips (by Olaf).
79: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 80: added pause for all (by Olaf).
1.17 fefe 81: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 82: added isupper and islower.
83: added putc and putchar as macros.
1.17 fefe 84: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
85: insightful discussions and patches I partially used for the last three)
1.18 fefe 86: added getpriority and setpriority (also by Abraham)
1.19 fefe 87: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 88: oi, setjmp and longjmp were broken on other platforms, too!
89: Thanks to Sébastien Côté for reporting this.
1.9 fefe 90:
91: 0.7:
1.6 olaf 92: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 93: Initial dynamic loading glue for i386, also by Olaf.
94: We don't have a dynamic loader yet, so this is not yet usable.
95: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
96: vsprintf, writev, all by Olaf.
1.2 fefe 97: imported readdir fix from Guillaume. Mhh, can the kernel interface
98: really be this broken?
1.3 fefe 99: Found a kludgy way to detect whether the kernel includes define struct
100: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
101: not work for you, please tell me!
1.4 fefe 102: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 103: Fixed stdio line buffering. The code was already there but I forgot
104: to mark stdio and stdout as line buffered. This should really be
105: done dynamically using isatty, though.
1.8 fefe 106: Removed superfluous "if (1)" in execvp.c
1.1 cvs 107:
108: 0.6.14:
109: *scanf did not append the 0 byte for %s.
110: added creat and changed creat to call open directly instead of open64.
111: did for fread what 0.6.10 did for fwrite.
112: repaired buffered stdio a little (line buffering is still not
113: supported).
114: [All of these bugs have been reported by Guillaume. Thanks!]
115: added __pure__ to strchr and strrchr in <string.h>
116:
117: 0.6.13:
118: included COPYING to make clear that the diet libc is covered by the
119: GNU General Public License (and _not_ the LGPL). That means that
120: you need to obtain a license from me if you want to use the diet
121: libc in a proprietary program that you want to distribute.
122: The x86 unified syscall swapped arguments #4 and #5 and noone
123: noticed until now! Thanks to Guillaume Cottenceau for reporting
124: this!
125: The malloc had a subtle bug with small allocations that could cause
126: segfault. Guillaume reported it, Olaf fixed it.
127:
128: 0.6.12:
129: added assert, statfs and fstatfs
130: added include/net/if.h so fget compiles again.
131:
132: 0.6.11:
133: added putenv.
134:
135: 0.6.10:
136: fixed fwrite. It returned the number of bytes written, not the number
137: of records. Thanks to Albert D. Cahalan for pointing this out.
138: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
139: added brk and sbrk. harold@nb.com.sg made me do it.
140:
141: 0.6.9:
142: fixed execvp not to return on ENOENT
143: did for {open|read|close|seek|tell}dir what I did for stat before.
144: The glibc compatibility part is currently non-functional.
145: fixed white space handling in sscanf " (" would not match " (".
146: fixed printf to accept 'l' flag.
147: fixed getpwuid (ignored last line)
148:
149: 0.6.8:
150: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
151: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
152: added strlcpy and strlcat from OpenBSD.
153: added stat64, fstat64 and lstat64.
154: added endian.h and made ending of strlen.c endianness-aware
155: added string routines size tweak to dietfeatures.h. Most of the
156: string routines have been unrolled. This is up to three times as
157: fast but creates up to three times larger code. Now you can disable
158: the unrolling.
159: added sendfile.
160: I also added pread. It works on x86 and sparc but not on ppc and mips.
161: I have no idea what's going on. strace disagrees with the kernel.
162: Can anyone help? I asked the Linux kernel mailing list for help, too.
163: added a few aliases of the type __libc_open for open. nm on
164: libpthreads.so indicates that we will need them.
165:
166: 0.6.7:
167: the sources now compile without warnings with -Wall.
168: printf now prints "(null)" when %s is passed NULL. This can be
169: removed with WANT_NULL_PRINTF in dietfeatures.h
170: added vfprintf, execl, ttyname.
171: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
172: __dietfstat so they can use the normal kernel struct stat.
173: stat, lstat and fstat are now C wrappers that convert to the glibc
174: struct stat. So we can avoid that overhead for programs that use
175: dietlibc headers.
176:
177: 0.6.6:
178: changed the Makefiles so you can now set CFLAGS on the command line
179: added memccmp (analogous to memccpy) and strncmp.
180: Olaf fixed another bug in the sparc unified syscall.
181: Paul Clifford contributed a C version of his strlen.S that is much
182: more efficient than the previous strlen on all platforms! It also
183: looks like technology from Roswell. ;-}
184: added a "real" stdio. Well, almost. Please contribute!
185: added dietfeatures.h so you can remove features you don't need.
186: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
187: stdio now works with simple programs and minigzip from libz.
188: stdio uses some major trickery to avoid linking the stdio, stderr and
189: stdout (and reserving space for them) when they are not used.
190:
191: 0.6.5:
192: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
193: most of them bugs in the new header files, but also missing sigset
194: functions.
195: Paul Clifford contributed an assembly strlen.S for ARM and fixed
196: several bugs.
197: Fixed ppc/setjmp and mips/pipe.
198: Olaf contributed a new sparc unified syscall.
199:
200: 0.6.4:
201: declared is* static inline in getservent.
202: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
203: changed strlen to return 0 when passed NULL.
204: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
205: Scientist who actually implemented this without access to a MIPS
206: box, just from reading the architecture manual. And it worked out
207: of the box.
208: started a set of system includes, mainly so that I can use lcc and
209: my alpha-linux cross compiler (which is unable to cross-compile
210: glibc). diet libc can now be compiled without any include files
211: from a normal libc. The includes do declare more than diet libc
212: currently delivers and they are still far from complete for real
213: applications.
214: I will only add assembly versions that are smaller _and_ faster than
215: the C version. Larger routines are only accepted if they are called
216: very often and are substantially faster.
217: added i386 assembly strchr, which is smaller and faster than the old
218: version. It is, however, larger than the version contributed by
219: proton (thanks, anyway).
220: added i386 strlen (31% faster, 14% smaller)
221: "make t" will now create a map file called "mapfile".
222:
223: 0.6.3:
224: added sys_errlist, strerror and perror
225: added isblank
226: added atol
227:
228: 0.6.2:
229: mmap for ARM didn't compile. Thanks, Paul!
230:
231: 0.6.1:
232: split mmap into the architecture specific subdirectories.
233: getenv now copes with environ==NULL, thanks Paul Clifford.
234: Paul also contributed a smaller ARM startup code.
235:
236: 0.6:
237: strcat returned the wrong result. Thanks, Dietz Pröpper.
238: strtod now understands a negative exponent (oops, thanks Bertram Barth)
239: Port to arm-linux-gnu, but on the Netwinder I use for testing the
240: __dtostr does not work (I have no idea why!)
241: The MIPS port now uses (much smaller) non-PIC code. That means that
242: the applications you link against diet libc also have to be compiled
243: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
244: Thanks to Ralf Bächle for helping me with this!
245: I made subdirectories for the architectures and use VPATH to override
246: VPATH so that make finds the source file automatically. That should
247: simplify the sources greatly.
248: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
249: ARM and MIPS now also have setjmp and longjmp
250: "compile" and "load" are now make targets. Use them for djb programs.
251: added contrib/elftrunc.c which will remove unnecessary ELF headers.
252: Again, contributed from Olaf. Great work!
253:
254: 0.5.12:
255: printf also does signed numbers.
256: If you don't use atexit, dietlibc now does not link exit, only _exit.
257: *printf now correctly returns the number of bytes written.
258: Olaf contributed experimental sscanf and vsscanf implementations.
259: If passed NULL as buffer, snprintf will not write anything but still
260: return the number of bytes it would have written.
261: Initial MIPS port! (Oh, the agony!)
262: No setjmp and longjmp support yet! Please contribute!
263: I even implemented unified syscalls for MIPS. Still, MIPS code is
264: almost twice the size of SPARC code. If anyone knows why: please
265: tell me!
266:
267: 0.5.11:
268: I implemented new unified syscalls for x86, sparc and ppc, this time based
269: on .s files and not .c files, and I moved the syscalls into
270: subdirectores to clean the dietlibc sources up a little.
271: A binary consisting of printf("%s is %d\n","olaf",23) is now
272: 2864 bytes on sparc
273: 2488 bytes on intel
274: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
275: to make a few more applications work.
276: Olaf Dreesen also implemented some unified syscall stuff for x86.
277: He discovered that with our unified syscall interface it actually
278: costs <10 bytes total to make all system calls thread safe!
279: I implemented atexit() (can register up to 4 callbacks).
280: I implemented strtod and __dtostr (the opposite). Now we can add
281: floating point support to vsnprintf and sscanf!
282:
283: 0.5.10:
284: I actually saw that I can not only merge the errno handling code of
285: the system calls on x86, I can also merge the rest (including the
286: arguments) except for setting the system call number. All those
287: system calls are now just a jump to a unified system call handler.
288: I got rid of x86openclose again. The savings are substantial:
289: chown from embutils went from 7664 to 7184 bytes!
290: If I'd move the system call wrappers to assembly language, I could
291: even reduce the alignment (does not matter since it's just a jump
292: anyway) and get rid of the "ret" behind each jump (one byte per
293: system call!)
294:
295: 0.5.9:
296: added memchr, strpbrk, strstr, strtol, isspace (hehe)
297: fixed strdup
298: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
299: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
300: (no signed integers, only strings and unsigned integers (but
301: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
302: that code must be wonderful, I don't understand it at all *bg*)
303: Olaf's printf does understand padding like in "%08d" and "%8d" and
304: automatically pads pointers with '0'.
305: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
306: Thanks to proton for inspiration on this.
307: The new x86 start code also does not reference exit any more, thus saving
308: 64 bytes for executables that don't call exit explicitly.
309: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
310: Moved errno and environ to start.S, saving no byte binary size but
311: speeding up compilation and slightly shortening dietlibc.a ;-)
312: For x86: joined open and close into one assembler file, sharing the
313: errno handling. This is a feasibility test and it actually saves a
314: few bytes. I think I will reimplement the _syscall[1-6] macros on
315: all platforms now to share the errno handling code for them.
316:
317: 0.5.8:
318: fixed strchr to be able to look for 0.
319:
320: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
321: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
322: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
323: contributed by Olaf Dreesen)
324:
325: added execvp, getcwd
326:
327: fixed __xmknod
328:
329: Note: can it be that the ftw interface really is so broken that I
330: cannot implement it without having to implement some searching data
331: structure? I included an experimental ftw implementation that will
332: not follow symlinks.
333:
334: 0.5.7:
335: oops, if_nametoindex was broken!
336:
337: 0.5.6:
338: ported to ppc-linux.
339: fixed i386 sigsetjmp (I mistyped the function name)
340: included sigjmp.c
341:
342: 0.5.5:
343: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
344: actually, it wasn't fork that wasn't working for sparc, it was pipe.
345: I fixed it now.
346: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
347: fixed readdir to use getdents and not the intel inline asm
348:
349: 0.5.4:
350: ported to sparclinux (sparc32 only). Beware: does not work yet.
351: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
352:
353: 0.5.3:
354: added tcsetattr and getenv to compile e3
355:
356: 0.5.2:
357: added vhangup, tcgetattr, isatty and memcmp for fgetty
358: (http://www.fefe.de/fgetty/)
359: added localtime from uC-libc.
360:
361: 0.5.1:
362: stat and friends actually work now. Yuck! Another case of
363: translation between kernel and userland. Why can't the kernel
364: people and the libc people simply agree on a standard?
365: removed many unnecessary includes to speed up compilation.
366: added -fomit-frame-pointer and i386 compilation target to reduce code size.
367: inlined socketcall to reduce code size.
368: "load" and "compile" are examples for djb code.
369:
370: 0.5:
371: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
372: each object file is now treated with "strip -x -R .note -R .comment"
373: split each system call into a separate object file
374: added ntohs, htons, alarm, if_indextoname and if_nametoindex
375:
376: 0.4.1:
377: oops, the strchr implementation was wrong. Thanks Jens Laas!
378:
379: 0.4:
380: copied opendir and friends from uC-libc.
381: added getservent and getservby* in gerservent.c
382:
383: 0.3:
384: remove readdir system call
385: added getdents system call
386: added getpwnam/getpwuid implementation in getpwnam.c
387: added a few string functions (in str*.c)
388:
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