Annotation of dietlibc/CHANGES, revision 1.80
1.74 fefe 1: 0.10:
2: update getpagesize.
3: add personality.
1.75 fefe 4: add "%*s" and "%*.*s" support to vsnprintf.
1.76 fefe 5: add putchar (apparently arm-linux-gcc will substitute printf("\n")
6: with putchar('\n') behind your back...?!
1.77 fefe 7: import include/scsi/ from glibc.
1.78 fefe 8: add iopl.
1.80 ! fefe 9: add execl and sigdelset prototypes.
! 10: add getopt_long stuff to getopt.h (may compile but won't link).
1.74 fefe 11:
1.73 fefe 12: 0.9:
1.65 fefe 13: fixed initgroups (oops)
1.66 fefe 14: Cleanup appending file open for stdio (thanks, James Antill)
15: imported vfprintf fix from James Antill.
1.67 fefe 16: add fnmatch
17: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 18: Olaf added character classes to *scanf.
1.69 fefe 19: Put object and library files into a separate directory (bin-$ARCH).
20: Add "cross" make target to make all architectures.
21: Add "diet" program and man page.
1.70 fefe 22: Add getgrnam, getgrgid
1.71 fefe 23: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 24: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 25:
1.64 fefe 26: 0.8:
1.34 fefe 27: vsnprintf(0,...) estimated the length of strings with a padding width
28: incorrectly.
1.35 fefe 29: new reboot() from Olaf.
1.36 fefe 30: added prototypes for getsockopt and setsockopt.
1.39 fefe 31: added experimental sem* and shm*
1.38 fefe 32: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 33: added setvbuf (only changes mode, not buffer)
1.41 fefe 34: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
35: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 36: added qsort() and bsearch(). Benchmark on 1000 random ints:
37: glibc: 679414 cycles qsort and 3352 cycles bsearch
38: diet libc: 300010 cycles qsort, 553 cycles bsearch
39: I have no idea why glibc is so slow.
1.43 fefe 40: added __isnan (references by libm.a from glibc).
41: added popen() and pclose(). Now the diet libc can link slsh (from
42: S-Lang!)
1.44 fefe 43: corrected usleep. It was more of an msleep until now.
1.45 fefe 44: corrected __dtostr (it looped when trying to format "0.0").
45: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 46: added ungetc (does it work?)
1.47 fefe 47: added inet_aton (yuck!)
1.50 fefe 48: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 49: added h_errno and __h_errno_location
50: added inet_ntoa
1.49 fefe 51: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 52: add bcopy, index, rindex macros
53: add isgraph and isxdigit
1.52 fefe 54: add strftime (ugh!!!)
1.53 olaf 55: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 56: Jeff Garzik contributed a spec file. I put it in contrib and hope
57: everbody knows what to do with it...
58: Olaf checked in a ton of libpthread stuff.
1.55 fefe 59: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 60: add large file backwards compatibility support (so gzip will run on
61: kernel 2.2 and 2.0)
1.57 fefe 62: added shutdown
1.58 fefe 63: added nice
64: added pseudo-locale support for is* (they are now weak aliases,
65: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
66: overwrite the default is* functions.
1.59 fefe 67: added liblatin1.a
1.60 fefe 68: added tzfile implementation (does it work for anyone else?)
1.61 fefe 69: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 70: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
71: Thanks!
1.63 fefe 72: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 73:
1.21 fefe 74: 0.7.2:
75: added several prototypes to already implemented functions and
76: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 77: added prototypes for process group and dup syscalls. Thanks to
78: Abraham again. He also contributed an implementation for daemon(),
79: an ugly BSD hack. I decided to diversify the lib/ directory a
80: little and now created a libugly/ directory for stuff like system()
81: and daemon() ;-)
82: added libstdio and moved all that stdio crap from lib/ there. The
83: idea is to start separating now what we will separate for shared
84: libraries anyway.
1.26 fefe 85: optimized x86 unified-syscall by Olaf.
1.27 fefe 86: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
87: limits.h instead)
88: added remove.c and enough cruft to limits.h to make it compile lzo,
89: lzop and bzip2.
1.28 fefe 90: added mktime, asctime_r, asctime and ctime (needed for gzip).
91: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 92: format some day (man tzfile, ugh!) :-(
1.29 fefe 93: added unlink prototype to unistd.h.
94: added gmtime and gmtime_r.
1.31 fefe 95: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 96: removed readdir glibc compatibility cruft.
1.31 fefe 97: removed stat glibc compatibility cruft.
1.32 fefe 98: oops, my fread was broken for pipes.
1.33 fefe 99: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 100:
1.9 fefe 101: 0.7.1:
1.11 fefe 102: optimized away the static arrays from __ltostr and __lltostr.
103: optimized away the static arrays (and more!) from strtoul and strtoull.
104: added system (by Olaf).
1.12 fefe 105: added tolower and toupper
1.13 fefe 106: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 107: added clone for mips (by Olaf).
108: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 109: added pause for all (by Olaf).
1.17 fefe 110: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 111: added isupper and islower.
112: added putc and putchar as macros.
1.17 fefe 113: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
114: insightful discussions and patches I partially used for the last three)
1.18 fefe 115: added getpriority and setpriority (also by Abraham)
1.19 fefe 116: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 117: oi, setjmp and longjmp were broken on other platforms, too!
118: Thanks to Sébastien Côté for reporting this.
1.9 fefe 119:
120: 0.7:
1.6 olaf 121: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 122: Initial dynamic loading glue for i386, also by Olaf.
123: We don't have a dynamic loader yet, so this is not yet usable.
124: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
125: vsprintf, writev, all by Olaf.
1.2 fefe 126: imported readdir fix from Guillaume. Mhh, can the kernel interface
127: really be this broken?
1.3 fefe 128: Found a kludgy way to detect whether the kernel includes define struct
129: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
130: not work for you, please tell me!
1.4 fefe 131: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 132: Fixed stdio line buffering. The code was already there but I forgot
133: to mark stdio and stdout as line buffered. This should really be
134: done dynamically using isatty, though.
1.8 fefe 135: Removed superfluous "if (1)" in execvp.c
1.1 cvs 136:
137: 0.6.14:
138: *scanf did not append the 0 byte for %s.
139: added creat and changed creat to call open directly instead of open64.
140: did for fread what 0.6.10 did for fwrite.
141: repaired buffered stdio a little (line buffering is still not
142: supported).
143: [All of these bugs have been reported by Guillaume. Thanks!]
144: added __pure__ to strchr and strrchr in <string.h>
145:
146: 0.6.13:
147: included COPYING to make clear that the diet libc is covered by the
148: GNU General Public License (and _not_ the LGPL). That means that
149: you need to obtain a license from me if you want to use the diet
150: libc in a proprietary program that you want to distribute.
151: The x86 unified syscall swapped arguments #4 and #5 and noone
152: noticed until now! Thanks to Guillaume Cottenceau for reporting
153: this!
154: The malloc had a subtle bug with small allocations that could cause
155: segfault. Guillaume reported it, Olaf fixed it.
156:
157: 0.6.12:
158: added assert, statfs and fstatfs
159: added include/net/if.h so fget compiles again.
160:
161: 0.6.11:
162: added putenv.
163:
164: 0.6.10:
165: fixed fwrite. It returned the number of bytes written, not the number
166: of records. Thanks to Albert D. Cahalan for pointing this out.
167: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
168: added brk and sbrk. harold@nb.com.sg made me do it.
169:
170: 0.6.9:
171: fixed execvp not to return on ENOENT
172: did for {open|read|close|seek|tell}dir what I did for stat before.
173: The glibc compatibility part is currently non-functional.
174: fixed white space handling in sscanf " (" would not match " (".
175: fixed printf to accept 'l' flag.
176: fixed getpwuid (ignored last line)
177:
178: 0.6.8:
179: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
180: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
181: added strlcpy and strlcat from OpenBSD.
182: added stat64, fstat64 and lstat64.
183: added endian.h and made ending of strlen.c endianness-aware
184: added string routines size tweak to dietfeatures.h. Most of the
185: string routines have been unrolled. This is up to three times as
186: fast but creates up to three times larger code. Now you can disable
187: the unrolling.
188: added sendfile.
189: I also added pread. It works on x86 and sparc but not on ppc and mips.
190: I have no idea what's going on. strace disagrees with the kernel.
191: Can anyone help? I asked the Linux kernel mailing list for help, too.
192: added a few aliases of the type __libc_open for open. nm on
193: libpthreads.so indicates that we will need them.
194:
195: 0.6.7:
196: the sources now compile without warnings with -Wall.
197: printf now prints "(null)" when %s is passed NULL. This can be
198: removed with WANT_NULL_PRINTF in dietfeatures.h
199: added vfprintf, execl, ttyname.
200: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
201: __dietfstat so they can use the normal kernel struct stat.
202: stat, lstat and fstat are now C wrappers that convert to the glibc
203: struct stat. So we can avoid that overhead for programs that use
204: dietlibc headers.
205:
206: 0.6.6:
207: changed the Makefiles so you can now set CFLAGS on the command line
208: added memccmp (analogous to memccpy) and strncmp.
209: Olaf fixed another bug in the sparc unified syscall.
210: Paul Clifford contributed a C version of his strlen.S that is much
211: more efficient than the previous strlen on all platforms! It also
212: looks like technology from Roswell. ;-}
213: added a "real" stdio. Well, almost. Please contribute!
214: added dietfeatures.h so you can remove features you don't need.
215: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
216: stdio now works with simple programs and minigzip from libz.
217: stdio uses some major trickery to avoid linking the stdio, stderr and
218: stdout (and reserving space for them) when they are not used.
219:
220: 0.6.5:
221: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
222: most of them bugs in the new header files, but also missing sigset
223: functions.
224: Paul Clifford contributed an assembly strlen.S for ARM and fixed
225: several bugs.
226: Fixed ppc/setjmp and mips/pipe.
227: Olaf contributed a new sparc unified syscall.
228:
229: 0.6.4:
230: declared is* static inline in getservent.
231: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
232: changed strlen to return 0 when passed NULL.
233: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
234: Scientist who actually implemented this without access to a MIPS
235: box, just from reading the architecture manual. And it worked out
236: of the box.
237: started a set of system includes, mainly so that I can use lcc and
238: my alpha-linux cross compiler (which is unable to cross-compile
239: glibc). diet libc can now be compiled without any include files
240: from a normal libc. The includes do declare more than diet libc
241: currently delivers and they are still far from complete for real
242: applications.
243: I will only add assembly versions that are smaller _and_ faster than
244: the C version. Larger routines are only accepted if they are called
245: very often and are substantially faster.
246: added i386 assembly strchr, which is smaller and faster than the old
247: version. It is, however, larger than the version contributed by
248: proton (thanks, anyway).
249: added i386 strlen (31% faster, 14% smaller)
250: "make t" will now create a map file called "mapfile".
251:
252: 0.6.3:
253: added sys_errlist, strerror and perror
254: added isblank
255: added atol
256:
257: 0.6.2:
258: mmap for ARM didn't compile. Thanks, Paul!
259:
260: 0.6.1:
261: split mmap into the architecture specific subdirectories.
262: getenv now copes with environ==NULL, thanks Paul Clifford.
263: Paul also contributed a smaller ARM startup code.
264:
265: 0.6:
266: strcat returned the wrong result. Thanks, Dietz Pröpper.
267: strtod now understands a negative exponent (oops, thanks Bertram Barth)
268: Port to arm-linux-gnu, but on the Netwinder I use for testing the
269: __dtostr does not work (I have no idea why!)
270: The MIPS port now uses (much smaller) non-PIC code. That means that
271: the applications you link against diet libc also have to be compiled
272: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
273: Thanks to Ralf Bächle for helping me with this!
274: I made subdirectories for the architectures and use VPATH to override
275: VPATH so that make finds the source file automatically. That should
276: simplify the sources greatly.
277: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
278: ARM and MIPS now also have setjmp and longjmp
279: "compile" and "load" are now make targets. Use them for djb programs.
280: added contrib/elftrunc.c which will remove unnecessary ELF headers.
281: Again, contributed from Olaf. Great work!
282:
283: 0.5.12:
284: printf also does signed numbers.
285: If you don't use atexit, dietlibc now does not link exit, only _exit.
286: *printf now correctly returns the number of bytes written.
287: Olaf contributed experimental sscanf and vsscanf implementations.
288: If passed NULL as buffer, snprintf will not write anything but still
289: return the number of bytes it would have written.
290: Initial MIPS port! (Oh, the agony!)
291: No setjmp and longjmp support yet! Please contribute!
292: I even implemented unified syscalls for MIPS. Still, MIPS code is
293: almost twice the size of SPARC code. If anyone knows why: please
294: tell me!
295:
296: 0.5.11:
297: I implemented new unified syscalls for x86, sparc and ppc, this time based
298: on .s files and not .c files, and I moved the syscalls into
299: subdirectores to clean the dietlibc sources up a little.
300: A binary consisting of printf("%s is %d\n","olaf",23) is now
301: 2864 bytes on sparc
302: 2488 bytes on intel
303: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
304: to make a few more applications work.
305: Olaf Dreesen also implemented some unified syscall stuff for x86.
306: He discovered that with our unified syscall interface it actually
307: costs <10 bytes total to make all system calls thread safe!
308: I implemented atexit() (can register up to 4 callbacks).
309: I implemented strtod and __dtostr (the opposite). Now we can add
310: floating point support to vsnprintf and sscanf!
311:
312: 0.5.10:
313: I actually saw that I can not only merge the errno handling code of
314: the system calls on x86, I can also merge the rest (including the
315: arguments) except for setting the system call number. All those
316: system calls are now just a jump to a unified system call handler.
317: I got rid of x86openclose again. The savings are substantial:
318: chown from embutils went from 7664 to 7184 bytes!
319: If I'd move the system call wrappers to assembly language, I could
320: even reduce the alignment (does not matter since it's just a jump
321: anyway) and get rid of the "ret" behind each jump (one byte per
322: system call!)
323:
324: 0.5.9:
325: added memchr, strpbrk, strstr, strtol, isspace (hehe)
326: fixed strdup
327: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
328: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
329: (no signed integers, only strings and unsigned integers (but
330: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
331: that code must be wonderful, I don't understand it at all *bg*)
332: Olaf's printf does understand padding like in "%08d" and "%8d" and
333: automatically pads pointers with '0'.
334: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
335: Thanks to proton for inspiration on this.
336: The new x86 start code also does not reference exit any more, thus saving
337: 64 bytes for executables that don't call exit explicitly.
338: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
339: Moved errno and environ to start.S, saving no byte binary size but
340: speeding up compilation and slightly shortening dietlibc.a ;-)
341: For x86: joined open and close into one assembler file, sharing the
342: errno handling. This is a feasibility test and it actually saves a
343: few bytes. I think I will reimplement the _syscall[1-6] macros on
344: all platforms now to share the errno handling code for them.
345:
346: 0.5.8:
347: fixed strchr to be able to look for 0.
348:
349: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
350: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
351: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
352: contributed by Olaf Dreesen)
353:
354: added execvp, getcwd
355:
356: fixed __xmknod
357:
358: Note: can it be that the ftw interface really is so broken that I
359: cannot implement it without having to implement some searching data
360: structure? I included an experimental ftw implementation that will
361: not follow symlinks.
362:
363: 0.5.7:
364: oops, if_nametoindex was broken!
365:
366: 0.5.6:
367: ported to ppc-linux.
368: fixed i386 sigsetjmp (I mistyped the function name)
369: included sigjmp.c
370:
371: 0.5.5:
372: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
373: actually, it wasn't fork that wasn't working for sparc, it was pipe.
374: I fixed it now.
375: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
376: fixed readdir to use getdents and not the intel inline asm
377:
378: 0.5.4:
379: ported to sparclinux (sparc32 only). Beware: does not work yet.
380: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
381:
382: 0.5.3:
383: added tcsetattr and getenv to compile e3
384:
385: 0.5.2:
386: added vhangup, tcgetattr, isatty and memcmp for fgetty
387: (http://www.fefe.de/fgetty/)
388: added localtime from uC-libc.
389:
390: 0.5.1:
391: stat and friends actually work now. Yuck! Another case of
392: translation between kernel and userland. Why can't the kernel
393: people and the libc people simply agree on a standard?
394: removed many unnecessary includes to speed up compilation.
395: added -fomit-frame-pointer and i386 compilation target to reduce code size.
396: inlined socketcall to reduce code size.
397: "load" and "compile" are examples for djb code.
398:
399: 0.5:
400: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
401: each object file is now treated with "strip -x -R .note -R .comment"
402: split each system call into a separate object file
403: added ntohs, htons, alarm, if_indextoname and if_nametoindex
404:
405: 0.4.1:
406: oops, the strchr implementation was wrong. Thanks Jens Laas!
407:
408: 0.4:
409: copied opendir and friends from uC-libc.
410: added getservent and getservby* in gerservent.c
411:
412: 0.3:
413: remove readdir system call
414: added getdents system call
415: added getpwnam/getpwuid implementation in getpwnam.c
416: added a few string functions (in str*.c)
417:
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