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