Annotation of dietlibc/CHANGES, revision 1.90
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).
1.82 fefe 12: add mlockall, munlockall
1.83 fefe 13: make "diet gcc foo.c" work.
14: added Sun RPC code and removed as many warnings as possible in a
15: heroic act of self-mutilation.
16: added getproto* and getdtablesize for the RPC cruft :-(
1.84 fefe 17: added getpass. mount from util-linux actually compiles now!
18: fix the sig*set routines. mount actually works now *bg*
19: fix fwrite dividing by zero when trying to fwrite n records of size 0.
1.85 fefe 20: added an initial regex implementation (3500 bytes!!!).
1.87 fefe 21: add llseek and lseek64 with optional lseek fall-back.
1.88 fefe 22: add res_init.
23: add asprintf (ugh, what an ugly function).
1.89 fefe 24: expanded arpa/nameser.h to include backwards compatibility defines
1.90 ! fefe 25: add ut_name alias to ut_host in struct utmp.
! 26: add inet_ntop, inet_pton, gethostbyname2.
1.74 fefe 27:
1.73 fefe 28: 0.9:
1.65 fefe 29: fixed initgroups (oops)
1.66 fefe 30: Cleanup appending file open for stdio (thanks, James Antill)
31: imported vfprintf fix from James Antill.
1.67 fefe 32: add fnmatch
33: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 34: Olaf added character classes to *scanf.
1.69 fefe 35: Put object and library files into a separate directory (bin-$ARCH).
36: Add "cross" make target to make all architectures.
37: Add "diet" program and man page.
1.70 fefe 38: Add getgrnam, getgrgid
1.71 fefe 39: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 40: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 41:
1.64 fefe 42: 0.8:
1.34 fefe 43: vsnprintf(0,...) estimated the length of strings with a padding width
44: incorrectly.
1.35 fefe 45: new reboot() from Olaf.
1.36 fefe 46: added prototypes for getsockopt and setsockopt.
1.39 fefe 47: added experimental sem* and shm*
1.38 fefe 48: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 49: added setvbuf (only changes mode, not buffer)
1.41 fefe 50: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
51: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 52: added qsort() and bsearch(). Benchmark on 1000 random ints:
53: glibc: 679414 cycles qsort and 3352 cycles bsearch
54: diet libc: 300010 cycles qsort, 553 cycles bsearch
55: I have no idea why glibc is so slow.
1.43 fefe 56: added __isnan (references by libm.a from glibc).
57: added popen() and pclose(). Now the diet libc can link slsh (from
58: S-Lang!)
1.44 fefe 59: corrected usleep. It was more of an msleep until now.
1.45 fefe 60: corrected __dtostr (it looped when trying to format "0.0").
61: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 62: added ungetc (does it work?)
1.47 fefe 63: added inet_aton (yuck!)
1.50 fefe 64: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 65: added h_errno and __h_errno_location
66: added inet_ntoa
1.49 fefe 67: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 68: add bcopy, index, rindex macros
69: add isgraph and isxdigit
1.52 fefe 70: add strftime (ugh!!!)
1.53 olaf 71: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 72: Jeff Garzik contributed a spec file. I put it in contrib and hope
73: everbody knows what to do with it...
74: Olaf checked in a ton of libpthread stuff.
1.55 fefe 75: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 76: add large file backwards compatibility support (so gzip will run on
77: kernel 2.2 and 2.0)
1.57 fefe 78: added shutdown
1.58 fefe 79: added nice
80: added pseudo-locale support for is* (they are now weak aliases,
81: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
82: overwrite the default is* functions.
1.59 fefe 83: added liblatin1.a
1.60 fefe 84: added tzfile implementation (does it work for anyone else?)
1.61 fefe 85: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 86: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
87: Thanks!
1.63 fefe 88: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 89:
1.21 fefe 90: 0.7.2:
91: added several prototypes to already implemented functions and
92: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 93: added prototypes for process group and dup syscalls. Thanks to
94: Abraham again. He also contributed an implementation for daemon(),
95: an ugly BSD hack. I decided to diversify the lib/ directory a
96: little and now created a libugly/ directory for stuff like system()
97: and daemon() ;-)
98: added libstdio and moved all that stdio crap from lib/ there. The
99: idea is to start separating now what we will separate for shared
100: libraries anyway.
1.26 fefe 101: optimized x86 unified-syscall by Olaf.
1.27 fefe 102: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
103: limits.h instead)
104: added remove.c and enough cruft to limits.h to make it compile lzo,
105: lzop and bzip2.
1.28 fefe 106: added mktime, asctime_r, asctime and ctime (needed for gzip).
107: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 108: format some day (man tzfile, ugh!) :-(
1.29 fefe 109: added unlink prototype to unistd.h.
110: added gmtime and gmtime_r.
1.31 fefe 111: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 112: removed readdir glibc compatibility cruft.
1.31 fefe 113: removed stat glibc compatibility cruft.
1.32 fefe 114: oops, my fread was broken for pipes.
1.33 fefe 115: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 116:
1.9 fefe 117: 0.7.1:
1.11 fefe 118: optimized away the static arrays from __ltostr and __lltostr.
119: optimized away the static arrays (and more!) from strtoul and strtoull.
120: added system (by Olaf).
1.12 fefe 121: added tolower and toupper
1.13 fefe 122: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 123: added clone for mips (by Olaf).
124: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 125: added pause for all (by Olaf).
1.17 fefe 126: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 127: added isupper and islower.
128: added putc and putchar as macros.
1.17 fefe 129: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
130: insightful discussions and patches I partially used for the last three)
1.18 fefe 131: added getpriority and setpriority (also by Abraham)
1.19 fefe 132: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 133: oi, setjmp and longjmp were broken on other platforms, too!
134: Thanks to Sébastien Côté for reporting this.
1.9 fefe 135:
136: 0.7:
1.6 olaf 137: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 138: Initial dynamic loading glue for i386, also by Olaf.
139: We don't have a dynamic loader yet, so this is not yet usable.
140: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
141: vsprintf, writev, all by Olaf.
1.2 fefe 142: imported readdir fix from Guillaume. Mhh, can the kernel interface
143: really be this broken?
1.3 fefe 144: Found a kludgy way to detect whether the kernel includes define struct
145: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
146: not work for you, please tell me!
1.4 fefe 147: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 148: Fixed stdio line buffering. The code was already there but I forgot
149: to mark stdio and stdout as line buffered. This should really be
150: done dynamically using isatty, though.
1.8 fefe 151: Removed superfluous "if (1)" in execvp.c
1.1 cvs 152:
153: 0.6.14:
154: *scanf did not append the 0 byte for %s.
155: added creat and changed creat to call open directly instead of open64.
156: did for fread what 0.6.10 did for fwrite.
157: repaired buffered stdio a little (line buffering is still not
158: supported).
159: [All of these bugs have been reported by Guillaume. Thanks!]
160: added __pure__ to strchr and strrchr in <string.h>
161:
162: 0.6.13:
163: included COPYING to make clear that the diet libc is covered by the
164: GNU General Public License (and _not_ the LGPL). That means that
165: you need to obtain a license from me if you want to use the diet
166: libc in a proprietary program that you want to distribute.
167: The x86 unified syscall swapped arguments #4 and #5 and noone
168: noticed until now! Thanks to Guillaume Cottenceau for reporting
169: this!
170: The malloc had a subtle bug with small allocations that could cause
171: segfault. Guillaume reported it, Olaf fixed it.
172:
173: 0.6.12:
174: added assert, statfs and fstatfs
175: added include/net/if.h so fget compiles again.
176:
177: 0.6.11:
178: added putenv.
179:
180: 0.6.10:
181: fixed fwrite. It returned the number of bytes written, not the number
182: of records. Thanks to Albert D. Cahalan for pointing this out.
183: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
184: added brk and sbrk. harold@nb.com.sg made me do it.
185:
186: 0.6.9:
187: fixed execvp not to return on ENOENT
188: did for {open|read|close|seek|tell}dir what I did for stat before.
189: The glibc compatibility part is currently non-functional.
190: fixed white space handling in sscanf " (" would not match " (".
191: fixed printf to accept 'l' flag.
192: fixed getpwuid (ignored last line)
193:
194: 0.6.8:
195: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
196: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
197: added strlcpy and strlcat from OpenBSD.
198: added stat64, fstat64 and lstat64.
199: added endian.h and made ending of strlen.c endianness-aware
200: added string routines size tweak to dietfeatures.h. Most of the
201: string routines have been unrolled. This is up to three times as
202: fast but creates up to three times larger code. Now you can disable
203: the unrolling.
204: added sendfile.
205: I also added pread. It works on x86 and sparc but not on ppc and mips.
206: I have no idea what's going on. strace disagrees with the kernel.
207: Can anyone help? I asked the Linux kernel mailing list for help, too.
208: added a few aliases of the type __libc_open for open. nm on
209: libpthreads.so indicates that we will need them.
210:
211: 0.6.7:
212: the sources now compile without warnings with -Wall.
213: printf now prints "(null)" when %s is passed NULL. This can be
214: removed with WANT_NULL_PRINTF in dietfeatures.h
215: added vfprintf, execl, ttyname.
216: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
217: __dietfstat so they can use the normal kernel struct stat.
218: stat, lstat and fstat are now C wrappers that convert to the glibc
219: struct stat. So we can avoid that overhead for programs that use
220: dietlibc headers.
221:
222: 0.6.6:
223: changed the Makefiles so you can now set CFLAGS on the command line
224: added memccmp (analogous to memccpy) and strncmp.
225: Olaf fixed another bug in the sparc unified syscall.
226: Paul Clifford contributed a C version of his strlen.S that is much
227: more efficient than the previous strlen on all platforms! It also
228: looks like technology from Roswell. ;-}
229: added a "real" stdio. Well, almost. Please contribute!
230: added dietfeatures.h so you can remove features you don't need.
231: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
232: stdio now works with simple programs and minigzip from libz.
233: stdio uses some major trickery to avoid linking the stdio, stderr and
234: stdout (and reserving space for them) when they are not used.
235:
236: 0.6.5:
237: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
238: most of them bugs in the new header files, but also missing sigset
239: functions.
240: Paul Clifford contributed an assembly strlen.S for ARM and fixed
241: several bugs.
242: Fixed ppc/setjmp and mips/pipe.
243: Olaf contributed a new sparc unified syscall.
244:
245: 0.6.4:
246: declared is* static inline in getservent.
247: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
248: changed strlen to return 0 when passed NULL.
249: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
250: Scientist who actually implemented this without access to a MIPS
251: box, just from reading the architecture manual. And it worked out
252: of the box.
253: started a set of system includes, mainly so that I can use lcc and
254: my alpha-linux cross compiler (which is unable to cross-compile
255: glibc). diet libc can now be compiled without any include files
256: from a normal libc. The includes do declare more than diet libc
257: currently delivers and they are still far from complete for real
258: applications.
259: I will only add assembly versions that are smaller _and_ faster than
260: the C version. Larger routines are only accepted if they are called
261: very often and are substantially faster.
262: added i386 assembly strchr, which is smaller and faster than the old
263: version. It is, however, larger than the version contributed by
264: proton (thanks, anyway).
265: added i386 strlen (31% faster, 14% smaller)
266: "make t" will now create a map file called "mapfile".
267:
268: 0.6.3:
269: added sys_errlist, strerror and perror
270: added isblank
271: added atol
272:
273: 0.6.2:
274: mmap for ARM didn't compile. Thanks, Paul!
275:
276: 0.6.1:
277: split mmap into the architecture specific subdirectories.
278: getenv now copes with environ==NULL, thanks Paul Clifford.
279: Paul also contributed a smaller ARM startup code.
280:
281: 0.6:
282: strcat returned the wrong result. Thanks, Dietz Pröpper.
283: strtod now understands a negative exponent (oops, thanks Bertram Barth)
284: Port to arm-linux-gnu, but on the Netwinder I use for testing the
285: __dtostr does not work (I have no idea why!)
286: The MIPS port now uses (much smaller) non-PIC code. That means that
287: the applications you link against diet libc also have to be compiled
288: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
289: Thanks to Ralf Bächle for helping me with this!
290: I made subdirectories for the architectures and use VPATH to override
291: VPATH so that make finds the source file automatically. That should
292: simplify the sources greatly.
293: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
294: ARM and MIPS now also have setjmp and longjmp
295: "compile" and "load" are now make targets. Use them for djb programs.
296: added contrib/elftrunc.c which will remove unnecessary ELF headers.
297: Again, contributed from Olaf. Great work!
298:
299: 0.5.12:
300: printf also does signed numbers.
301: If you don't use atexit, dietlibc now does not link exit, only _exit.
302: *printf now correctly returns the number of bytes written.
303: Olaf contributed experimental sscanf and vsscanf implementations.
304: If passed NULL as buffer, snprintf will not write anything but still
305: return the number of bytes it would have written.
306: Initial MIPS port! (Oh, the agony!)
307: No setjmp and longjmp support yet! Please contribute!
308: I even implemented unified syscalls for MIPS. Still, MIPS code is
309: almost twice the size of SPARC code. If anyone knows why: please
310: tell me!
311:
312: 0.5.11:
313: I implemented new unified syscalls for x86, sparc and ppc, this time based
314: on .s files and not .c files, and I moved the syscalls into
315: subdirectores to clean the dietlibc sources up a little.
316: A binary consisting of printf("%s is %d\n","olaf",23) is now
317: 2864 bytes on sparc
318: 2488 bytes on intel
319: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
320: to make a few more applications work.
321: Olaf Dreesen also implemented some unified syscall stuff for x86.
322: He discovered that with our unified syscall interface it actually
323: costs <10 bytes total to make all system calls thread safe!
324: I implemented atexit() (can register up to 4 callbacks).
325: I implemented strtod and __dtostr (the opposite). Now we can add
326: floating point support to vsnprintf and sscanf!
327:
328: 0.5.10:
329: I actually saw that I can not only merge the errno handling code of
330: the system calls on x86, I can also merge the rest (including the
331: arguments) except for setting the system call number. All those
332: system calls are now just a jump to a unified system call handler.
333: I got rid of x86openclose again. The savings are substantial:
334: chown from embutils went from 7664 to 7184 bytes!
335: If I'd move the system call wrappers to assembly language, I could
336: even reduce the alignment (does not matter since it's just a jump
337: anyway) and get rid of the "ret" behind each jump (one byte per
338: system call!)
339:
340: 0.5.9:
341: added memchr, strpbrk, strstr, strtol, isspace (hehe)
342: fixed strdup
343: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
344: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
345: (no signed integers, only strings and unsigned integers (but
346: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
347: that code must be wonderful, I don't understand it at all *bg*)
348: Olaf's printf does understand padding like in "%08d" and "%8d" and
349: automatically pads pointers with '0'.
350: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
351: Thanks to proton for inspiration on this.
352: The new x86 start code also does not reference exit any more, thus saving
353: 64 bytes for executables that don't call exit explicitly.
354: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
355: Moved errno and environ to start.S, saving no byte binary size but
356: speeding up compilation and slightly shortening dietlibc.a ;-)
357: For x86: joined open and close into one assembler file, sharing the
358: errno handling. This is a feasibility test and it actually saves a
359: few bytes. I think I will reimplement the _syscall[1-6] macros on
360: all platforms now to share the errno handling code for them.
361:
362: 0.5.8:
363: fixed strchr to be able to look for 0.
364:
365: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
366: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
367: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
368: contributed by Olaf Dreesen)
369:
370: added execvp, getcwd
371:
372: fixed __xmknod
373:
374: Note: can it be that the ftw interface really is so broken that I
375: cannot implement it without having to implement some searching data
376: structure? I included an experimental ftw implementation that will
377: not follow symlinks.
378:
379: 0.5.7:
380: oops, if_nametoindex was broken!
381:
382: 0.5.6:
383: ported to ppc-linux.
384: fixed i386 sigsetjmp (I mistyped the function name)
385: included sigjmp.c
386:
387: 0.5.5:
388: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
389: actually, it wasn't fork that wasn't working for sparc, it was pipe.
390: I fixed it now.
391: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
392: fixed readdir to use getdents and not the intel inline asm
393:
394: 0.5.4:
395: ported to sparclinux (sparc32 only). Beware: does not work yet.
396: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
397:
398: 0.5.3:
399: added tcsetattr and getenv to compile e3
400:
401: 0.5.2:
402: added vhangup, tcgetattr, isatty and memcmp for fgetty
403: (http://www.fefe.de/fgetty/)
404: added localtime from uC-libc.
405:
406: 0.5.1:
407: stat and friends actually work now. Yuck! Another case of
408: translation between kernel and userland. Why can't the kernel
409: people and the libc people simply agree on a standard?
410: removed many unnecessary includes to speed up compilation.
411: added -fomit-frame-pointer and i386 compilation target to reduce code size.
412: inlined socketcall to reduce code size.
413: "load" and "compile" are examples for djb code.
414:
415: 0.5:
416: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
417: each object file is now treated with "strip -x -R .note -R .comment"
418: split each system call into a separate object file
419: added ntohs, htons, alarm, if_indextoname and if_nametoindex
420:
421: 0.4.1:
422: oops, the strchr implementation was wrong. Thanks Jens Laas!
423:
424: 0.4:
425: copied opendir and friends from uC-libc.
426: added getservent and getservby* in gerservent.c
427:
428: 0.3:
429: remove readdir system call
430: added getdents system call
431: added getpwnam/getpwuid implementation in getpwnam.c
432: added a few string functions (in str*.c)
433:
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