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