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