Annotation of dietlibc/CHANGES, revision 1.99
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.
1.92 fefe 27: add sysinfo, recvmsg, sendmsg.
1.93 fefe 28: add endmntent, getmntent, setmntent.
1.94 fefe 29: fix fnmatch (thanks, Guillaume Cottenceau!)
1.96 fefe 30: add setenv.
31: remove __restrict from mntent.h, add __restrict__ removal alias for
32: older gcc versions in sys/cdefs.h.
33: add rlim_t, sig_atomic_t declarations.
34: add sigsetjmp #define for __sigsetjmp (oops).
35: (Thanks to Chris Siebenmann for these three bug reports)
1.97 fefe 36: add a gruesome hack to printf floating point to accept %f and kludge
37: together support for %.2f. Don't look at the code, please!
1.98 fefe 38: fixed tcsetpgrp (oops, this is embarassing! Thanks, Chris Siebenmann)
1.99 ! fefe 39: imported fix for entlib by Jeff Garzik.
1.74 fefe 40:
1.73 fefe 41: 0.9:
1.65 fefe 42: fixed initgroups (oops)
1.66 fefe 43: Cleanup appending file open for stdio (thanks, James Antill)
44: imported vfprintf fix from James Antill.
1.67 fefe 45: add fnmatch
46: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 47: Olaf added character classes to *scanf.
1.69 fefe 48: Put object and library files into a separate directory (bin-$ARCH).
49: Add "cross" make target to make all architectures.
50: Add "diet" program and man page.
1.70 fefe 51: Add getgrnam, getgrgid
1.71 fefe 52: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 53: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 54:
1.64 fefe 55: 0.8:
1.34 fefe 56: vsnprintf(0,...) estimated the length of strings with a padding width
57: incorrectly.
1.35 fefe 58: new reboot() from Olaf.
1.36 fefe 59: added prototypes for getsockopt and setsockopt.
1.39 fefe 60: added experimental sem* and shm*
1.38 fefe 61: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 62: added setvbuf (only changes mode, not buffer)
1.41 fefe 63: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
64: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 65: added qsort() and bsearch(). Benchmark on 1000 random ints:
66: glibc: 679414 cycles qsort and 3352 cycles bsearch
67: diet libc: 300010 cycles qsort, 553 cycles bsearch
68: I have no idea why glibc is so slow.
1.43 fefe 69: added __isnan (references by libm.a from glibc).
70: added popen() and pclose(). Now the diet libc can link slsh (from
71: S-Lang!)
1.44 fefe 72: corrected usleep. It was more of an msleep until now.
1.45 fefe 73: corrected __dtostr (it looped when trying to format "0.0").
74: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 75: added ungetc (does it work?)
1.47 fefe 76: added inet_aton (yuck!)
1.50 fefe 77: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 78: added h_errno and __h_errno_location
79: added inet_ntoa
1.49 fefe 80: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 81: add bcopy, index, rindex macros
82: add isgraph and isxdigit
1.52 fefe 83: add strftime (ugh!!!)
1.53 olaf 84: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 85: Jeff Garzik contributed a spec file. I put it in contrib and hope
86: everbody knows what to do with it...
87: Olaf checked in a ton of libpthread stuff.
1.55 fefe 88: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 89: add large file backwards compatibility support (so gzip will run on
90: kernel 2.2 and 2.0)
1.57 fefe 91: added shutdown
1.58 fefe 92: added nice
93: added pseudo-locale support for is* (they are now weak aliases,
94: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
95: overwrite the default is* functions.
1.59 fefe 96: added liblatin1.a
1.60 fefe 97: added tzfile implementation (does it work for anyone else?)
1.61 fefe 98: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 99: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
100: Thanks!
1.63 fefe 101: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 102:
1.21 fefe 103: 0.7.2:
104: added several prototypes to already implemented functions and
105: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 106: added prototypes for process group and dup syscalls. Thanks to
107: Abraham again. He also contributed an implementation for daemon(),
108: an ugly BSD hack. I decided to diversify the lib/ directory a
109: little and now created a libugly/ directory for stuff like system()
110: and daemon() ;-)
111: added libstdio and moved all that stdio crap from lib/ there. The
112: idea is to start separating now what we will separate for shared
113: libraries anyway.
1.26 fefe 114: optimized x86 unified-syscall by Olaf.
1.27 fefe 115: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
116: limits.h instead)
117: added remove.c and enough cruft to limits.h to make it compile lzo,
118: lzop and bzip2.
1.28 fefe 119: added mktime, asctime_r, asctime and ctime (needed for gzip).
120: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 121: format some day (man tzfile, ugh!) :-(
1.29 fefe 122: added unlink prototype to unistd.h.
123: added gmtime and gmtime_r.
1.31 fefe 124: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 125: removed readdir glibc compatibility cruft.
1.31 fefe 126: removed stat glibc compatibility cruft.
1.32 fefe 127: oops, my fread was broken for pipes.
1.33 fefe 128: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 129:
1.9 fefe 130: 0.7.1:
1.11 fefe 131: optimized away the static arrays from __ltostr and __lltostr.
132: optimized away the static arrays (and more!) from strtoul and strtoull.
133: added system (by Olaf).
1.12 fefe 134: added tolower and toupper
1.13 fefe 135: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 136: added clone for mips (by Olaf).
137: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 138: added pause for all (by Olaf).
1.17 fefe 139: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 140: added isupper and islower.
141: added putc and putchar as macros.
1.17 fefe 142: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
143: insightful discussions and patches I partially used for the last three)
1.18 fefe 144: added getpriority and setpriority (also by Abraham)
1.19 fefe 145: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 146: oi, setjmp and longjmp were broken on other platforms, too!
147: Thanks to Sébastien Côté for reporting this.
1.9 fefe 148:
149: 0.7:
1.6 olaf 150: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 151: Initial dynamic loading glue for i386, also by Olaf.
152: We don't have a dynamic loader yet, so this is not yet usable.
153: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
154: vsprintf, writev, all by Olaf.
1.2 fefe 155: imported readdir fix from Guillaume. Mhh, can the kernel interface
156: really be this broken?
1.3 fefe 157: Found a kludgy way to detect whether the kernel includes define struct
158: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
159: not work for you, please tell me!
1.4 fefe 160: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 161: Fixed stdio line buffering. The code was already there but I forgot
162: to mark stdio and stdout as line buffered. This should really be
163: done dynamically using isatty, though.
1.8 fefe 164: Removed superfluous "if (1)" in execvp.c
1.1 cvs 165:
166: 0.6.14:
167: *scanf did not append the 0 byte for %s.
168: added creat and changed creat to call open directly instead of open64.
169: did for fread what 0.6.10 did for fwrite.
170: repaired buffered stdio a little (line buffering is still not
171: supported).
172: [All of these bugs have been reported by Guillaume. Thanks!]
173: added __pure__ to strchr and strrchr in <string.h>
174:
175: 0.6.13:
176: included COPYING to make clear that the diet libc is covered by the
177: GNU General Public License (and _not_ the LGPL). That means that
178: you need to obtain a license from me if you want to use the diet
179: libc in a proprietary program that you want to distribute.
180: The x86 unified syscall swapped arguments #4 and #5 and noone
181: noticed until now! Thanks to Guillaume Cottenceau for reporting
182: this!
183: The malloc had a subtle bug with small allocations that could cause
184: segfault. Guillaume reported it, Olaf fixed it.
185:
186: 0.6.12:
187: added assert, statfs and fstatfs
188: added include/net/if.h so fget compiles again.
189:
190: 0.6.11:
191: added putenv.
192:
193: 0.6.10:
194: fixed fwrite. It returned the number of bytes written, not the number
195: of records. Thanks to Albert D. Cahalan for pointing this out.
196: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
197: added brk and sbrk. harold@nb.com.sg made me do it.
198:
199: 0.6.9:
200: fixed execvp not to return on ENOENT
201: did for {open|read|close|seek|tell}dir what I did for stat before.
202: The glibc compatibility part is currently non-functional.
203: fixed white space handling in sscanf " (" would not match " (".
204: fixed printf to accept 'l' flag.
205: fixed getpwuid (ignored last line)
206:
207: 0.6.8:
208: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
209: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
210: added strlcpy and strlcat from OpenBSD.
211: added stat64, fstat64 and lstat64.
212: added endian.h and made ending of strlen.c endianness-aware
213: added string routines size tweak to dietfeatures.h. Most of the
214: string routines have been unrolled. This is up to three times as
215: fast but creates up to three times larger code. Now you can disable
216: the unrolling.
217: added sendfile.
218: I also added pread. It works on x86 and sparc but not on ppc and mips.
219: I have no idea what's going on. strace disagrees with the kernel.
220: Can anyone help? I asked the Linux kernel mailing list for help, too.
221: added a few aliases of the type __libc_open for open. nm on
222: libpthreads.so indicates that we will need them.
223:
224: 0.6.7:
225: the sources now compile without warnings with -Wall.
226: printf now prints "(null)" when %s is passed NULL. This can be
227: removed with WANT_NULL_PRINTF in dietfeatures.h
228: added vfprintf, execl, ttyname.
229: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
230: __dietfstat so they can use the normal kernel struct stat.
231: stat, lstat and fstat are now C wrappers that convert to the glibc
232: struct stat. So we can avoid that overhead for programs that use
233: dietlibc headers.
234:
235: 0.6.6:
236: changed the Makefiles so you can now set CFLAGS on the command line
237: added memccmp (analogous to memccpy) and strncmp.
238: Olaf fixed another bug in the sparc unified syscall.
239: Paul Clifford contributed a C version of his strlen.S that is much
240: more efficient than the previous strlen on all platforms! It also
241: looks like technology from Roswell. ;-}
242: added a "real" stdio. Well, almost. Please contribute!
243: added dietfeatures.h so you can remove features you don't need.
244: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
245: stdio now works with simple programs and minigzip from libz.
246: stdio uses some major trickery to avoid linking the stdio, stderr and
247: stdout (and reserving space for them) when they are not used.
248:
249: 0.6.5:
250: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
251: most of them bugs in the new header files, but also missing sigset
252: functions.
253: Paul Clifford contributed an assembly strlen.S for ARM and fixed
254: several bugs.
255: Fixed ppc/setjmp and mips/pipe.
256: Olaf contributed a new sparc unified syscall.
257:
258: 0.6.4:
259: declared is* static inline in getservent.
260: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
261: changed strlen to return 0 when passed NULL.
262: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
263: Scientist who actually implemented this without access to a MIPS
264: box, just from reading the architecture manual. And it worked out
265: of the box.
266: started a set of system includes, mainly so that I can use lcc and
267: my alpha-linux cross compiler (which is unable to cross-compile
268: glibc). diet libc can now be compiled without any include files
269: from a normal libc. The includes do declare more than diet libc
270: currently delivers and they are still far from complete for real
271: applications.
272: I will only add assembly versions that are smaller _and_ faster than
273: the C version. Larger routines are only accepted if they are called
274: very often and are substantially faster.
275: added i386 assembly strchr, which is smaller and faster than the old
276: version. It is, however, larger than the version contributed by
277: proton (thanks, anyway).
278: added i386 strlen (31% faster, 14% smaller)
279: "make t" will now create a map file called "mapfile".
280:
281: 0.6.3:
282: added sys_errlist, strerror and perror
283: added isblank
284: added atol
285:
286: 0.6.2:
287: mmap for ARM didn't compile. Thanks, Paul!
288:
289: 0.6.1:
290: split mmap into the architecture specific subdirectories.
291: getenv now copes with environ==NULL, thanks Paul Clifford.
292: Paul also contributed a smaller ARM startup code.
293:
294: 0.6:
295: strcat returned the wrong result. Thanks, Dietz Pröpper.
296: strtod now understands a negative exponent (oops, thanks Bertram Barth)
297: Port to arm-linux-gnu, but on the Netwinder I use for testing the
298: __dtostr does not work (I have no idea why!)
299: The MIPS port now uses (much smaller) non-PIC code. That means that
300: the applications you link against diet libc also have to be compiled
301: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
302: Thanks to Ralf Bächle for helping me with this!
303: I made subdirectories for the architectures and use VPATH to override
304: VPATH so that make finds the source file automatically. That should
305: simplify the sources greatly.
306: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
307: ARM and MIPS now also have setjmp and longjmp
308: "compile" and "load" are now make targets. Use them for djb programs.
309: added contrib/elftrunc.c which will remove unnecessary ELF headers.
310: Again, contributed from Olaf. Great work!
311:
312: 0.5.12:
313: printf also does signed numbers.
314: If you don't use atexit, dietlibc now does not link exit, only _exit.
315: *printf now correctly returns the number of bytes written.
316: Olaf contributed experimental sscanf and vsscanf implementations.
317: If passed NULL as buffer, snprintf will not write anything but still
318: return the number of bytes it would have written.
319: Initial MIPS port! (Oh, the agony!)
320: No setjmp and longjmp support yet! Please contribute!
321: I even implemented unified syscalls for MIPS. Still, MIPS code is
322: almost twice the size of SPARC code. If anyone knows why: please
323: tell me!
324:
325: 0.5.11:
326: I implemented new unified syscalls for x86, sparc and ppc, this time based
327: on .s files and not .c files, and I moved the syscalls into
328: subdirectores to clean the dietlibc sources up a little.
329: A binary consisting of printf("%s is %d\n","olaf",23) is now
330: 2864 bytes on sparc
331: 2488 bytes on intel
332: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
333: to make a few more applications work.
334: Olaf Dreesen also implemented some unified syscall stuff for x86.
335: He discovered that with our unified syscall interface it actually
336: costs <10 bytes total to make all system calls thread safe!
337: I implemented atexit() (can register up to 4 callbacks).
338: I implemented strtod and __dtostr (the opposite). Now we can add
339: floating point support to vsnprintf and sscanf!
340:
341: 0.5.10:
342: I actually saw that I can not only merge the errno handling code of
343: the system calls on x86, I can also merge the rest (including the
344: arguments) except for setting the system call number. All those
345: system calls are now just a jump to a unified system call handler.
346: I got rid of x86openclose again. The savings are substantial:
347: chown from embutils went from 7664 to 7184 bytes!
348: If I'd move the system call wrappers to assembly language, I could
349: even reduce the alignment (does not matter since it's just a jump
350: anyway) and get rid of the "ret" behind each jump (one byte per
351: system call!)
352:
353: 0.5.9:
354: added memchr, strpbrk, strstr, strtol, isspace (hehe)
355: fixed strdup
356: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
357: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
358: (no signed integers, only strings and unsigned integers (but
359: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
360: that code must be wonderful, I don't understand it at all *bg*)
361: Olaf's printf does understand padding like in "%08d" and "%8d" and
362: automatically pads pointers with '0'.
363: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
364: Thanks to proton for inspiration on this.
365: The new x86 start code also does not reference exit any more, thus saving
366: 64 bytes for executables that don't call exit explicitly.
367: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
368: Moved errno and environ to start.S, saving no byte binary size but
369: speeding up compilation and slightly shortening dietlibc.a ;-)
370: For x86: joined open and close into one assembler file, sharing the
371: errno handling. This is a feasibility test and it actually saves a
372: few bytes. I think I will reimplement the _syscall[1-6] macros on
373: all platforms now to share the errno handling code for them.
374:
375: 0.5.8:
376: fixed strchr to be able to look for 0.
377:
378: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
379: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
380: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
381: contributed by Olaf Dreesen)
382:
383: added execvp, getcwd
384:
385: fixed __xmknod
386:
387: Note: can it be that the ftw interface really is so broken that I
388: cannot implement it without having to implement some searching data
389: structure? I included an experimental ftw implementation that will
390: not follow symlinks.
391:
392: 0.5.7:
393: oops, if_nametoindex was broken!
394:
395: 0.5.6:
396: ported to ppc-linux.
397: fixed i386 sigsetjmp (I mistyped the function name)
398: included sigjmp.c
399:
400: 0.5.5:
401: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
402: actually, it wasn't fork that wasn't working for sparc, it was pipe.
403: I fixed it now.
404: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
405: fixed readdir to use getdents and not the intel inline asm
406:
407: 0.5.4:
408: ported to sparclinux (sparc32 only). Beware: does not work yet.
409: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
410:
411: 0.5.3:
412: added tcsetattr and getenv to compile e3
413:
414: 0.5.2:
415: added vhangup, tcgetattr, isatty and memcmp for fgetty
416: (http://www.fefe.de/fgetty/)
417: added localtime from uC-libc.
418:
419: 0.5.1:
420: stat and friends actually work now. Yuck! Another case of
421: translation between kernel and userland. Why can't the kernel
422: people and the libc people simply agree on a standard?
423: removed many unnecessary includes to speed up compilation.
424: added -fomit-frame-pointer and i386 compilation target to reduce code size.
425: inlined socketcall to reduce code size.
426: "load" and "compile" are examples for djb code.
427:
428: 0.5:
429: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
430: each object file is now treated with "strip -x -R .note -R .comment"
431: split each system call into a separate object file
432: added ntohs, htons, alarm, if_indextoname and if_nametoindex
433:
434: 0.4.1:
435: oops, the strchr implementation was wrong. Thanks Jens Laas!
436:
437: 0.4:
438: copied opendir and friends from uC-libc.
439: added getservent and getservby* in gerservent.c
440:
441: 0.3:
442: remove readdir system call
443: added getdents system call
444: added getpwnam/getpwuid implementation in getpwnam.c
445: added a few string functions (in str*.c)
446:
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