Annotation of dietlibc/CHANGES, revision 1.67
1.65 fefe 1: 0.8.1:
2: fixed initgroups (oops)
1.66 fefe 3: Cleanup appending file open for stdio (thanks, James Antill)
4: imported vfprintf fix from James Antill.
1.67 ! fefe 5: add fnmatch
! 6: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.65 fefe 7:
1.64 fefe 8: 0.8:
1.34 fefe 9: vsnprintf(0,...) estimated the length of strings with a padding width
10: incorrectly.
1.35 fefe 11: new reboot() from Olaf.
1.36 fefe 12: added prototypes for getsockopt and setsockopt.
1.39 fefe 13: added experimental sem* and shm*
1.38 fefe 14: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 15: added setvbuf (only changes mode, not buffer)
1.41 fefe 16: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
17: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 18: added qsort() and bsearch(). Benchmark on 1000 random ints:
19: glibc: 679414 cycles qsort and 3352 cycles bsearch
20: diet libc: 300010 cycles qsort, 553 cycles bsearch
21: I have no idea why glibc is so slow.
1.43 fefe 22: added __isnan (references by libm.a from glibc).
23: added popen() and pclose(). Now the diet libc can link slsh (from
24: S-Lang!)
1.44 fefe 25: corrected usleep. It was more of an msleep until now.
1.45 fefe 26: corrected __dtostr (it looped when trying to format "0.0").
27: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 28: added ungetc (does it work?)
1.47 fefe 29: added inet_aton (yuck!)
1.50 fefe 30: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 31: added h_errno and __h_errno_location
32: added inet_ntoa
1.49 fefe 33: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 34: add bcopy, index, rindex macros
35: add isgraph and isxdigit
1.52 fefe 36: add strftime (ugh!!!)
1.53 olaf 37: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 38: Jeff Garzik contributed a spec file. I put it in contrib and hope
39: everbody knows what to do with it...
40: Olaf checked in a ton of libpthread stuff.
1.55 fefe 41: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 42: add large file backwards compatibility support (so gzip will run on
43: kernel 2.2 and 2.0)
1.57 fefe 44: added shutdown
1.58 fefe 45: added nice
46: added pseudo-locale support for is* (they are now weak aliases,
47: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
48: overwrite the default is* functions.
1.59 fefe 49: added liblatin1.a
1.60 fefe 50: added tzfile implementation (does it work for anyone else?)
1.61 fefe 51: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 52: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
53: Thanks!
1.63 fefe 54: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 55:
1.21 fefe 56: 0.7.2:
57: added several prototypes to already implemented functions and
58: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 59: added prototypes for process group and dup syscalls. Thanks to
60: Abraham again. He also contributed an implementation for daemon(),
61: an ugly BSD hack. I decided to diversify the lib/ directory a
62: little and now created a libugly/ directory for stuff like system()
63: and daemon() ;-)
64: added libstdio and moved all that stdio crap from lib/ there. The
65: idea is to start separating now what we will separate for shared
66: libraries anyway.
1.26 fefe 67: optimized x86 unified-syscall by Olaf.
1.27 fefe 68: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
69: limits.h instead)
70: added remove.c and enough cruft to limits.h to make it compile lzo,
71: lzop and bzip2.
1.28 fefe 72: added mktime, asctime_r, asctime and ctime (needed for gzip).
73: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 74: format some day (man tzfile, ugh!) :-(
1.29 fefe 75: added unlink prototype to unistd.h.
76: added gmtime and gmtime_r.
1.31 fefe 77: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 78: removed readdir glibc compatibility cruft.
1.31 fefe 79: removed stat glibc compatibility cruft.
1.32 fefe 80: oops, my fread was broken for pipes.
1.33 fefe 81: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 82:
1.9 fefe 83: 0.7.1:
1.11 fefe 84: optimized away the static arrays from __ltostr and __lltostr.
85: optimized away the static arrays (and more!) from strtoul and strtoull.
86: added system (by Olaf).
1.12 fefe 87: added tolower and toupper
1.13 fefe 88: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 89: added clone for mips (by Olaf).
90: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 91: added pause for all (by Olaf).
1.17 fefe 92: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 93: added isupper and islower.
94: added putc and putchar as macros.
1.17 fefe 95: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
96: insightful discussions and patches I partially used for the last three)
1.18 fefe 97: added getpriority and setpriority (also by Abraham)
1.19 fefe 98: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 99: oi, setjmp and longjmp were broken on other platforms, too!
100: Thanks to Sébastien Côté for reporting this.
1.9 fefe 101:
102: 0.7:
1.6 olaf 103: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 104: Initial dynamic loading glue for i386, also by Olaf.
105: We don't have a dynamic loader yet, so this is not yet usable.
106: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
107: vsprintf, writev, all by Olaf.
1.2 fefe 108: imported readdir fix from Guillaume. Mhh, can the kernel interface
109: really be this broken?
1.3 fefe 110: Found a kludgy way to detect whether the kernel includes define struct
111: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
112: not work for you, please tell me!
1.4 fefe 113: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 114: Fixed stdio line buffering. The code was already there but I forgot
115: to mark stdio and stdout as line buffered. This should really be
116: done dynamically using isatty, though.
1.8 fefe 117: Removed superfluous "if (1)" in execvp.c
1.1 cvs 118:
119: 0.6.14:
120: *scanf did not append the 0 byte for %s.
121: added creat and changed creat to call open directly instead of open64.
122: did for fread what 0.6.10 did for fwrite.
123: repaired buffered stdio a little (line buffering is still not
124: supported).
125: [All of these bugs have been reported by Guillaume. Thanks!]
126: added __pure__ to strchr and strrchr in <string.h>
127:
128: 0.6.13:
129: included COPYING to make clear that the diet libc is covered by the
130: GNU General Public License (and _not_ the LGPL). That means that
131: you need to obtain a license from me if you want to use the diet
132: libc in a proprietary program that you want to distribute.
133: The x86 unified syscall swapped arguments #4 and #5 and noone
134: noticed until now! Thanks to Guillaume Cottenceau for reporting
135: this!
136: The malloc had a subtle bug with small allocations that could cause
137: segfault. Guillaume reported it, Olaf fixed it.
138:
139: 0.6.12:
140: added assert, statfs and fstatfs
141: added include/net/if.h so fget compiles again.
142:
143: 0.6.11:
144: added putenv.
145:
146: 0.6.10:
147: fixed fwrite. It returned the number of bytes written, not the number
148: of records. Thanks to Albert D. Cahalan for pointing this out.
149: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
150: added brk and sbrk. harold@nb.com.sg made me do it.
151:
152: 0.6.9:
153: fixed execvp not to return on ENOENT
154: did for {open|read|close|seek|tell}dir what I did for stat before.
155: The glibc compatibility part is currently non-functional.
156: fixed white space handling in sscanf " (" would not match " (".
157: fixed printf to accept 'l' flag.
158: fixed getpwuid (ignored last line)
159:
160: 0.6.8:
161: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
162: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
163: added strlcpy and strlcat from OpenBSD.
164: added stat64, fstat64 and lstat64.
165: added endian.h and made ending of strlen.c endianness-aware
166: added string routines size tweak to dietfeatures.h. Most of the
167: string routines have been unrolled. This is up to three times as
168: fast but creates up to three times larger code. Now you can disable
169: the unrolling.
170: added sendfile.
171: I also added pread. It works on x86 and sparc but not on ppc and mips.
172: I have no idea what's going on. strace disagrees with the kernel.
173: Can anyone help? I asked the Linux kernel mailing list for help, too.
174: added a few aliases of the type __libc_open for open. nm on
175: libpthreads.so indicates that we will need them.
176:
177: 0.6.7:
178: the sources now compile without warnings with -Wall.
179: printf now prints "(null)" when %s is passed NULL. This can be
180: removed with WANT_NULL_PRINTF in dietfeatures.h
181: added vfprintf, execl, ttyname.
182: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
183: __dietfstat so they can use the normal kernel struct stat.
184: stat, lstat and fstat are now C wrappers that convert to the glibc
185: struct stat. So we can avoid that overhead for programs that use
186: dietlibc headers.
187:
188: 0.6.6:
189: changed the Makefiles so you can now set CFLAGS on the command line
190: added memccmp (analogous to memccpy) and strncmp.
191: Olaf fixed another bug in the sparc unified syscall.
192: Paul Clifford contributed a C version of his strlen.S that is much
193: more efficient than the previous strlen on all platforms! It also
194: looks like technology from Roswell. ;-}
195: added a "real" stdio. Well, almost. Please contribute!
196: added dietfeatures.h so you can remove features you don't need.
197: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
198: stdio now works with simple programs and minigzip from libz.
199: stdio uses some major trickery to avoid linking the stdio, stderr and
200: stdout (and reserving space for them) when they are not used.
201:
202: 0.6.5:
203: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
204: most of them bugs in the new header files, but also missing sigset
205: functions.
206: Paul Clifford contributed an assembly strlen.S for ARM and fixed
207: several bugs.
208: Fixed ppc/setjmp and mips/pipe.
209: Olaf contributed a new sparc unified syscall.
210:
211: 0.6.4:
212: declared is* static inline in getservent.
213: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
214: changed strlen to return 0 when passed NULL.
215: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
216: Scientist who actually implemented this without access to a MIPS
217: box, just from reading the architecture manual. And it worked out
218: of the box.
219: started a set of system includes, mainly so that I can use lcc and
220: my alpha-linux cross compiler (which is unable to cross-compile
221: glibc). diet libc can now be compiled without any include files
222: from a normal libc. The includes do declare more than diet libc
223: currently delivers and they are still far from complete for real
224: applications.
225: I will only add assembly versions that are smaller _and_ faster than
226: the C version. Larger routines are only accepted if they are called
227: very often and are substantially faster.
228: added i386 assembly strchr, which is smaller and faster than the old
229: version. It is, however, larger than the version contributed by
230: proton (thanks, anyway).
231: added i386 strlen (31% faster, 14% smaller)
232: "make t" will now create a map file called "mapfile".
233:
234: 0.6.3:
235: added sys_errlist, strerror and perror
236: added isblank
237: added atol
238:
239: 0.6.2:
240: mmap for ARM didn't compile. Thanks, Paul!
241:
242: 0.6.1:
243: split mmap into the architecture specific subdirectories.
244: getenv now copes with environ==NULL, thanks Paul Clifford.
245: Paul also contributed a smaller ARM startup code.
246:
247: 0.6:
248: strcat returned the wrong result. Thanks, Dietz Pröpper.
249: strtod now understands a negative exponent (oops, thanks Bertram Barth)
250: Port to arm-linux-gnu, but on the Netwinder I use for testing the
251: __dtostr does not work (I have no idea why!)
252: The MIPS port now uses (much smaller) non-PIC code. That means that
253: the applications you link against diet libc also have to be compiled
254: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
255: Thanks to Ralf Bächle for helping me with this!
256: I made subdirectories for the architectures and use VPATH to override
257: VPATH so that make finds the source file automatically. That should
258: simplify the sources greatly.
259: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
260: ARM and MIPS now also have setjmp and longjmp
261: "compile" and "load" are now make targets. Use them for djb programs.
262: added contrib/elftrunc.c which will remove unnecessary ELF headers.
263: Again, contributed from Olaf. Great work!
264:
265: 0.5.12:
266: printf also does signed numbers.
267: If you don't use atexit, dietlibc now does not link exit, only _exit.
268: *printf now correctly returns the number of bytes written.
269: Olaf contributed experimental sscanf and vsscanf implementations.
270: If passed NULL as buffer, snprintf will not write anything but still
271: return the number of bytes it would have written.
272: Initial MIPS port! (Oh, the agony!)
273: No setjmp and longjmp support yet! Please contribute!
274: I even implemented unified syscalls for MIPS. Still, MIPS code is
275: almost twice the size of SPARC code. If anyone knows why: please
276: tell me!
277:
278: 0.5.11:
279: I implemented new unified syscalls for x86, sparc and ppc, this time based
280: on .s files and not .c files, and I moved the syscalls into
281: subdirectores to clean the dietlibc sources up a little.
282: A binary consisting of printf("%s is %d\n","olaf",23) is now
283: 2864 bytes on sparc
284: 2488 bytes on intel
285: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
286: to make a few more applications work.
287: Olaf Dreesen also implemented some unified syscall stuff for x86.
288: He discovered that with our unified syscall interface it actually
289: costs <10 bytes total to make all system calls thread safe!
290: I implemented atexit() (can register up to 4 callbacks).
291: I implemented strtod and __dtostr (the opposite). Now we can add
292: floating point support to vsnprintf and sscanf!
293:
294: 0.5.10:
295: I actually saw that I can not only merge the errno handling code of
296: the system calls on x86, I can also merge the rest (including the
297: arguments) except for setting the system call number. All those
298: system calls are now just a jump to a unified system call handler.
299: I got rid of x86openclose again. The savings are substantial:
300: chown from embutils went from 7664 to 7184 bytes!
301: If I'd move the system call wrappers to assembly language, I could
302: even reduce the alignment (does not matter since it's just a jump
303: anyway) and get rid of the "ret" behind each jump (one byte per
304: system call!)
305:
306: 0.5.9:
307: added memchr, strpbrk, strstr, strtol, isspace (hehe)
308: fixed strdup
309: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
310: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
311: (no signed integers, only strings and unsigned integers (but
312: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
313: that code must be wonderful, I don't understand it at all *bg*)
314: Olaf's printf does understand padding like in "%08d" and "%8d" and
315: automatically pads pointers with '0'.
316: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
317: Thanks to proton for inspiration on this.
318: The new x86 start code also does not reference exit any more, thus saving
319: 64 bytes for executables that don't call exit explicitly.
320: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
321: Moved errno and environ to start.S, saving no byte binary size but
322: speeding up compilation and slightly shortening dietlibc.a ;-)
323: For x86: joined open and close into one assembler file, sharing the
324: errno handling. This is a feasibility test and it actually saves a
325: few bytes. I think I will reimplement the _syscall[1-6] macros on
326: all platforms now to share the errno handling code for them.
327:
328: 0.5.8:
329: fixed strchr to be able to look for 0.
330:
331: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
332: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
333: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
334: contributed by Olaf Dreesen)
335:
336: added execvp, getcwd
337:
338: fixed __xmknod
339:
340: Note: can it be that the ftw interface really is so broken that I
341: cannot implement it without having to implement some searching data
342: structure? I included an experimental ftw implementation that will
343: not follow symlinks.
344:
345: 0.5.7:
346: oops, if_nametoindex was broken!
347:
348: 0.5.6:
349: ported to ppc-linux.
350: fixed i386 sigsetjmp (I mistyped the function name)
351: included sigjmp.c
352:
353: 0.5.5:
354: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
355: actually, it wasn't fork that wasn't working for sparc, it was pipe.
356: I fixed it now.
357: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
358: fixed readdir to use getdents and not the intel inline asm
359:
360: 0.5.4:
361: ported to sparclinux (sparc32 only). Beware: does not work yet.
362: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
363:
364: 0.5.3:
365: added tcsetattr and getenv to compile e3
366:
367: 0.5.2:
368: added vhangup, tcgetattr, isatty and memcmp for fgetty
369: (http://www.fefe.de/fgetty/)
370: added localtime from uC-libc.
371:
372: 0.5.1:
373: stat and friends actually work now. Yuck! Another case of
374: translation between kernel and userland. Why can't the kernel
375: people and the libc people simply agree on a standard?
376: removed many unnecessary includes to speed up compilation.
377: added -fomit-frame-pointer and i386 compilation target to reduce code size.
378: inlined socketcall to reduce code size.
379: "load" and "compile" are examples for djb code.
380:
381: 0.5:
382: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
383: each object file is now treated with "strip -x -R .note -R .comment"
384: split each system call into a separate object file
385: added ntohs, htons, alarm, if_indextoname and if_nametoindex
386:
387: 0.4.1:
388: oops, the strchr implementation was wrong. Thanks Jens Laas!
389:
390: 0.4:
391: copied opendir and friends from uC-libc.
392: added getservent and getservby* in gerservent.c
393:
394: 0.3:
395: remove readdir system call
396: added getdents system call
397: added getpwnam/getpwuid implementation in getpwnam.c
398: added a few string functions (in str*.c)
399:
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