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