Annotation of dietlibc/CHANGES, revision 1.81
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).
1.81 ! fefe 11: add RPC headers (no code yet).
1.74 fefe 12:
1.73 fefe 13: 0.9:
1.65 fefe 14: fixed initgroups (oops)
1.66 fefe 15: Cleanup appending file open for stdio (thanks, James Antill)
16: imported vfprintf fix from James Antill.
1.67 fefe 17: add fnmatch
18: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 19: Olaf added character classes to *scanf.
1.69 fefe 20: Put object and library files into a separate directory (bin-$ARCH).
21: Add "cross" make target to make all architectures.
22: Add "diet" program and man page.
1.70 fefe 23: Add getgrnam, getgrgid
1.71 fefe 24: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 25: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 26:
1.64 fefe 27: 0.8:
1.34 fefe 28: vsnprintf(0,...) estimated the length of strings with a padding width
29: incorrectly.
1.35 fefe 30: new reboot() from Olaf.
1.36 fefe 31: added prototypes for getsockopt and setsockopt.
1.39 fefe 32: added experimental sem* and shm*
1.38 fefe 33: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 34: added setvbuf (only changes mode, not buffer)
1.41 fefe 35: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
36: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 37: added qsort() and bsearch(). Benchmark on 1000 random ints:
38: glibc: 679414 cycles qsort and 3352 cycles bsearch
39: diet libc: 300010 cycles qsort, 553 cycles bsearch
40: I have no idea why glibc is so slow.
1.43 fefe 41: added __isnan (references by libm.a from glibc).
42: added popen() and pclose(). Now the diet libc can link slsh (from
43: S-Lang!)
1.44 fefe 44: corrected usleep. It was more of an msleep until now.
1.45 fefe 45: corrected __dtostr (it looped when trying to format "0.0").
46: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 47: added ungetc (does it work?)
1.47 fefe 48: added inet_aton (yuck!)
1.50 fefe 49: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 50: added h_errno and __h_errno_location
51: added inet_ntoa
1.49 fefe 52: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 53: add bcopy, index, rindex macros
54: add isgraph and isxdigit
1.52 fefe 55: add strftime (ugh!!!)
1.53 olaf 56: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 57: Jeff Garzik contributed a spec file. I put it in contrib and hope
58: everbody knows what to do with it...
59: Olaf checked in a ton of libpthread stuff.
1.55 fefe 60: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 61: add large file backwards compatibility support (so gzip will run on
62: kernel 2.2 and 2.0)
1.57 fefe 63: added shutdown
1.58 fefe 64: added nice
65: added pseudo-locale support for is* (they are now weak aliases,
66: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
67: overwrite the default is* functions.
1.59 fefe 68: added liblatin1.a
1.60 fefe 69: added tzfile implementation (does it work for anyone else?)
1.61 fefe 70: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 71: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
72: Thanks!
1.63 fefe 73: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 74:
1.21 fefe 75: 0.7.2:
76: added several prototypes to already implemented functions and
77: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 78: added prototypes for process group and dup syscalls. Thanks to
79: Abraham again. He also contributed an implementation for daemon(),
80: an ugly BSD hack. I decided to diversify the lib/ directory a
81: little and now created a libugly/ directory for stuff like system()
82: and daemon() ;-)
83: added libstdio and moved all that stdio crap from lib/ there. The
84: idea is to start separating now what we will separate for shared
85: libraries anyway.
1.26 fefe 86: optimized x86 unified-syscall by Olaf.
1.27 fefe 87: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
88: limits.h instead)
89: added remove.c and enough cruft to limits.h to make it compile lzo,
90: lzop and bzip2.
1.28 fefe 91: added mktime, asctime_r, asctime and ctime (needed for gzip).
92: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 93: format some day (man tzfile, ugh!) :-(
1.29 fefe 94: added unlink prototype to unistd.h.
95: added gmtime and gmtime_r.
1.31 fefe 96: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 97: removed readdir glibc compatibility cruft.
1.31 fefe 98: removed stat glibc compatibility cruft.
1.32 fefe 99: oops, my fread was broken for pipes.
1.33 fefe 100: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 101:
1.9 fefe 102: 0.7.1:
1.11 fefe 103: optimized away the static arrays from __ltostr and __lltostr.
104: optimized away the static arrays (and more!) from strtoul and strtoull.
105: added system (by Olaf).
1.12 fefe 106: added tolower and toupper
1.13 fefe 107: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 108: added clone for mips (by Olaf).
109: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 110: added pause for all (by Olaf).
1.17 fefe 111: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 112: added isupper and islower.
113: added putc and putchar as macros.
1.17 fefe 114: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
115: insightful discussions and patches I partially used for the last three)
1.18 fefe 116: added getpriority and setpriority (also by Abraham)
1.19 fefe 117: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 118: oi, setjmp and longjmp were broken on other platforms, too!
119: Thanks to Sébastien Côté for reporting this.
1.9 fefe 120:
121: 0.7:
1.6 olaf 122: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 123: Initial dynamic loading glue for i386, also by Olaf.
124: We don't have a dynamic loader yet, so this is not yet usable.
125: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
126: vsprintf, writev, all by Olaf.
1.2 fefe 127: imported readdir fix from Guillaume. Mhh, can the kernel interface
128: really be this broken?
1.3 fefe 129: Found a kludgy way to detect whether the kernel includes define struct
130: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
131: not work for you, please tell me!
1.4 fefe 132: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 133: Fixed stdio line buffering. The code was already there but I forgot
134: to mark stdio and stdout as line buffered. This should really be
135: done dynamically using isatty, though.
1.8 fefe 136: Removed superfluous "if (1)" in execvp.c
1.1 cvs 137:
138: 0.6.14:
139: *scanf did not append the 0 byte for %s.
140: added creat and changed creat to call open directly instead of open64.
141: did for fread what 0.6.10 did for fwrite.
142: repaired buffered stdio a little (line buffering is still not
143: supported).
144: [All of these bugs have been reported by Guillaume. Thanks!]
145: added __pure__ to strchr and strrchr in <string.h>
146:
147: 0.6.13:
148: included COPYING to make clear that the diet libc is covered by the
149: GNU General Public License (and _not_ the LGPL). That means that
150: you need to obtain a license from me if you want to use the diet
151: libc in a proprietary program that you want to distribute.
152: The x86 unified syscall swapped arguments #4 and #5 and noone
153: noticed until now! Thanks to Guillaume Cottenceau for reporting
154: this!
155: The malloc had a subtle bug with small allocations that could cause
156: segfault. Guillaume reported it, Olaf fixed it.
157:
158: 0.6.12:
159: added assert, statfs and fstatfs
160: added include/net/if.h so fget compiles again.
161:
162: 0.6.11:
163: added putenv.
164:
165: 0.6.10:
166: fixed fwrite. It returned the number of bytes written, not the number
167: of records. Thanks to Albert D. Cahalan for pointing this out.
168: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
169: added brk and sbrk. harold@nb.com.sg made me do it.
170:
171: 0.6.9:
172: fixed execvp not to return on ENOENT
173: did for {open|read|close|seek|tell}dir what I did for stat before.
174: The glibc compatibility part is currently non-functional.
175: fixed white space handling in sscanf " (" would not match " (".
176: fixed printf to accept 'l' flag.
177: fixed getpwuid (ignored last line)
178:
179: 0.6.8:
180: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
181: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
182: added strlcpy and strlcat from OpenBSD.
183: added stat64, fstat64 and lstat64.
184: added endian.h and made ending of strlen.c endianness-aware
185: added string routines size tweak to dietfeatures.h. Most of the
186: string routines have been unrolled. This is up to three times as
187: fast but creates up to three times larger code. Now you can disable
188: the unrolling.
189: added sendfile.
190: I also added pread. It works on x86 and sparc but not on ppc and mips.
191: I have no idea what's going on. strace disagrees with the kernel.
192: Can anyone help? I asked the Linux kernel mailing list for help, too.
193: added a few aliases of the type __libc_open for open. nm on
194: libpthreads.so indicates that we will need them.
195:
196: 0.6.7:
197: the sources now compile without warnings with -Wall.
198: printf now prints "(null)" when %s is passed NULL. This can be
199: removed with WANT_NULL_PRINTF in dietfeatures.h
200: added vfprintf, execl, ttyname.
201: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
202: __dietfstat so they can use the normal kernel struct stat.
203: stat, lstat and fstat are now C wrappers that convert to the glibc
204: struct stat. So we can avoid that overhead for programs that use
205: dietlibc headers.
206:
207: 0.6.6:
208: changed the Makefiles so you can now set CFLAGS on the command line
209: added memccmp (analogous to memccpy) and strncmp.
210: Olaf fixed another bug in the sparc unified syscall.
211: Paul Clifford contributed a C version of his strlen.S that is much
212: more efficient than the previous strlen on all platforms! It also
213: looks like technology from Roswell. ;-}
214: added a "real" stdio. Well, almost. Please contribute!
215: added dietfeatures.h so you can remove features you don't need.
216: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
217: stdio now works with simple programs and minigzip from libz.
218: stdio uses some major trickery to avoid linking the stdio, stderr and
219: stdout (and reserving space for them) when they are not used.
220:
221: 0.6.5:
222: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
223: most of them bugs in the new header files, but also missing sigset
224: functions.
225: Paul Clifford contributed an assembly strlen.S for ARM and fixed
226: several bugs.
227: Fixed ppc/setjmp and mips/pipe.
228: Olaf contributed a new sparc unified syscall.
229:
230: 0.6.4:
231: declared is* static inline in getservent.
232: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
233: changed strlen to return 0 when passed NULL.
234: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
235: Scientist who actually implemented this without access to a MIPS
236: box, just from reading the architecture manual. And it worked out
237: of the box.
238: started a set of system includes, mainly so that I can use lcc and
239: my alpha-linux cross compiler (which is unable to cross-compile
240: glibc). diet libc can now be compiled without any include files
241: from a normal libc. The includes do declare more than diet libc
242: currently delivers and they are still far from complete for real
243: applications.
244: I will only add assembly versions that are smaller _and_ faster than
245: the C version. Larger routines are only accepted if they are called
246: very often and are substantially faster.
247: added i386 assembly strchr, which is smaller and faster than the old
248: version. It is, however, larger than the version contributed by
249: proton (thanks, anyway).
250: added i386 strlen (31% faster, 14% smaller)
251: "make t" will now create a map file called "mapfile".
252:
253: 0.6.3:
254: added sys_errlist, strerror and perror
255: added isblank
256: added atol
257:
258: 0.6.2:
259: mmap for ARM didn't compile. Thanks, Paul!
260:
261: 0.6.1:
262: split mmap into the architecture specific subdirectories.
263: getenv now copes with environ==NULL, thanks Paul Clifford.
264: Paul also contributed a smaller ARM startup code.
265:
266: 0.6:
267: strcat returned the wrong result. Thanks, Dietz Pröpper.
268: strtod now understands a negative exponent (oops, thanks Bertram Barth)
269: Port to arm-linux-gnu, but on the Netwinder I use for testing the
270: __dtostr does not work (I have no idea why!)
271: The MIPS port now uses (much smaller) non-PIC code. That means that
272: the applications you link against diet libc also have to be compiled
273: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
274: Thanks to Ralf Bächle for helping me with this!
275: I made subdirectories for the architectures and use VPATH to override
276: VPATH so that make finds the source file automatically. That should
277: simplify the sources greatly.
278: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
279: ARM and MIPS now also have setjmp and longjmp
280: "compile" and "load" are now make targets. Use them for djb programs.
281: added contrib/elftrunc.c which will remove unnecessary ELF headers.
282: Again, contributed from Olaf. Great work!
283:
284: 0.5.12:
285: printf also does signed numbers.
286: If you don't use atexit, dietlibc now does not link exit, only _exit.
287: *printf now correctly returns the number of bytes written.
288: Olaf contributed experimental sscanf and vsscanf implementations.
289: If passed NULL as buffer, snprintf will not write anything but still
290: return the number of bytes it would have written.
291: Initial MIPS port! (Oh, the agony!)
292: No setjmp and longjmp support yet! Please contribute!
293: I even implemented unified syscalls for MIPS. Still, MIPS code is
294: almost twice the size of SPARC code. If anyone knows why: please
295: tell me!
296:
297: 0.5.11:
298: I implemented new unified syscalls for x86, sparc and ppc, this time based
299: on .s files and not .c files, and I moved the syscalls into
300: subdirectores to clean the dietlibc sources up a little.
301: A binary consisting of printf("%s is %d\n","olaf",23) is now
302: 2864 bytes on sparc
303: 2488 bytes on intel
304: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
305: to make a few more applications work.
306: Olaf Dreesen also implemented some unified syscall stuff for x86.
307: He discovered that with our unified syscall interface it actually
308: costs <10 bytes total to make all system calls thread safe!
309: I implemented atexit() (can register up to 4 callbacks).
310: I implemented strtod and __dtostr (the opposite). Now we can add
311: floating point support to vsnprintf and sscanf!
312:
313: 0.5.10:
314: I actually saw that I can not only merge the errno handling code of
315: the system calls on x86, I can also merge the rest (including the
316: arguments) except for setting the system call number. All those
317: system calls are now just a jump to a unified system call handler.
318: I got rid of x86openclose again. The savings are substantial:
319: chown from embutils went from 7664 to 7184 bytes!
320: If I'd move the system call wrappers to assembly language, I could
321: even reduce the alignment (does not matter since it's just a jump
322: anyway) and get rid of the "ret" behind each jump (one byte per
323: system call!)
324:
325: 0.5.9:
326: added memchr, strpbrk, strstr, strtol, isspace (hehe)
327: fixed strdup
328: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
329: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
330: (no signed integers, only strings and unsigned integers (but
331: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
332: that code must be wonderful, I don't understand it at all *bg*)
333: Olaf's printf does understand padding like in "%08d" and "%8d" and
334: automatically pads pointers with '0'.
335: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
336: Thanks to proton for inspiration on this.
337: The new x86 start code also does not reference exit any more, thus saving
338: 64 bytes for executables that don't call exit explicitly.
339: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
340: Moved errno and environ to start.S, saving no byte binary size but
341: speeding up compilation and slightly shortening dietlibc.a ;-)
342: For x86: joined open and close into one assembler file, sharing the
343: errno handling. This is a feasibility test and it actually saves a
344: few bytes. I think I will reimplement the _syscall[1-6] macros on
345: all platforms now to share the errno handling code for them.
346:
347: 0.5.8:
348: fixed strchr to be able to look for 0.
349:
350: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
351: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
352: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
353: contributed by Olaf Dreesen)
354:
355: added execvp, getcwd
356:
357: fixed __xmknod
358:
359: Note: can it be that the ftw interface really is so broken that I
360: cannot implement it without having to implement some searching data
361: structure? I included an experimental ftw implementation that will
362: not follow symlinks.
363:
364: 0.5.7:
365: oops, if_nametoindex was broken!
366:
367: 0.5.6:
368: ported to ppc-linux.
369: fixed i386 sigsetjmp (I mistyped the function name)
370: included sigjmp.c
371:
372: 0.5.5:
373: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
374: actually, it wasn't fork that wasn't working for sparc, it was pipe.
375: I fixed it now.
376: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
377: fixed readdir to use getdents and not the intel inline asm
378:
379: 0.5.4:
380: ported to sparclinux (sparc32 only). Beware: does not work yet.
381: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
382:
383: 0.5.3:
384: added tcsetattr and getenv to compile e3
385:
386: 0.5.2:
387: added vhangup, tcgetattr, isatty and memcmp for fgetty
388: (http://www.fefe.de/fgetty/)
389: added localtime from uC-libc.
390:
391: 0.5.1:
392: stat and friends actually work now. Yuck! Another case of
393: translation between kernel and userland. Why can't the kernel
394: people and the libc people simply agree on a standard?
395: removed many unnecessary includes to speed up compilation.
396: added -fomit-frame-pointer and i386 compilation target to reduce code size.
397: inlined socketcall to reduce code size.
398: "load" and "compile" are examples for djb code.
399:
400: 0.5:
401: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
402: each object file is now treated with "strip -x -R .note -R .comment"
403: split each system call into a separate object file
404: added ntohs, htons, alarm, if_indextoname and if_nametoindex
405:
406: 0.4.1:
407: oops, the strchr implementation was wrong. Thanks Jens Laas!
408:
409: 0.4:
410: copied opendir and friends from uC-libc.
411: added getservent and getservby* in gerservent.c
412:
413: 0.3:
414: remove readdir system call
415: added getdents system call
416: added getpwnam/getpwuid implementation in getpwnam.c
417: added a few string functions (in str*.c)
418:
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