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