Annotation of dietlibc/CHANGES, revision 1.103
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.
1.100 fefe 40: add glob implementation from Guillaume Cottenceau (Thanks!!)
41: add libdl fragments from Olaf (Yeah! One step closer to dynamic linking!)
1.101 fefe 42: add REG_ICASE and word start/end handling to my regular expressions.
43: my regular expressions now actually match substrings (i.e. "foobar" to "bar").
1.102 fefe 44: wrap getcwd to comply to man page (the syscall returns the number of
45: bytes, not the buffer)
46: add realpath.
1.103 ! fefe 47: fix vfprintf.
1.74 fefe 48:
1.73 fefe 49: 0.9:
1.65 fefe 50: fixed initgroups (oops)
1.66 fefe 51: Cleanup appending file open for stdio (thanks, James Antill)
52: imported vfprintf fix from James Antill.
1.67 fefe 53: add fnmatch
54: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 55: Olaf added character classes to *scanf.
1.69 fefe 56: Put object and library files into a separate directory (bin-$ARCH).
57: Add "cross" make target to make all architectures.
58: Add "diet" program and man page.
1.70 fefe 59: Add getgrnam, getgrgid
1.71 fefe 60: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 61: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 62:
1.64 fefe 63: 0.8:
1.34 fefe 64: vsnprintf(0,...) estimated the length of strings with a padding width
65: incorrectly.
1.35 fefe 66: new reboot() from Olaf.
1.36 fefe 67: added prototypes for getsockopt and setsockopt.
1.39 fefe 68: added experimental sem* and shm*
1.38 fefe 69: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 70: added setvbuf (only changes mode, not buffer)
1.41 fefe 71: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
72: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 73: added qsort() and bsearch(). Benchmark on 1000 random ints:
74: glibc: 679414 cycles qsort and 3352 cycles bsearch
75: diet libc: 300010 cycles qsort, 553 cycles bsearch
76: I have no idea why glibc is so slow.
1.43 fefe 77: added __isnan (references by libm.a from glibc).
78: added popen() and pclose(). Now the diet libc can link slsh (from
79: S-Lang!)
1.44 fefe 80: corrected usleep. It was more of an msleep until now.
1.45 fefe 81: corrected __dtostr (it looped when trying to format "0.0").
82: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 83: added ungetc (does it work?)
1.47 fefe 84: added inet_aton (yuck!)
1.50 fefe 85: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 86: added h_errno and __h_errno_location
87: added inet_ntoa
1.49 fefe 88: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 89: add bcopy, index, rindex macros
90: add isgraph and isxdigit
1.52 fefe 91: add strftime (ugh!!!)
1.53 olaf 92: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 93: Jeff Garzik contributed a spec file. I put it in contrib and hope
94: everbody knows what to do with it...
95: Olaf checked in a ton of libpthread stuff.
1.55 fefe 96: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 97: add large file backwards compatibility support (so gzip will run on
98: kernel 2.2 and 2.0)
1.57 fefe 99: added shutdown
1.58 fefe 100: added nice
101: added pseudo-locale support for is* (they are now weak aliases,
102: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
103: overwrite the default is* functions.
1.59 fefe 104: added liblatin1.a
1.60 fefe 105: added tzfile implementation (does it work for anyone else?)
1.61 fefe 106: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 107: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
108: Thanks!
1.63 fefe 109: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 110:
1.21 fefe 111: 0.7.2:
112: added several prototypes to already implemented functions and
113: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 114: added prototypes for process group and dup syscalls. Thanks to
115: Abraham again. He also contributed an implementation for daemon(),
116: an ugly BSD hack. I decided to diversify the lib/ directory a
117: little and now created a libugly/ directory for stuff like system()
118: and daemon() ;-)
119: added libstdio and moved all that stdio crap from lib/ there. The
120: idea is to start separating now what we will separate for shared
121: libraries anyway.
1.26 fefe 122: optimized x86 unified-syscall by Olaf.
1.27 fefe 123: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
124: limits.h instead)
125: added remove.c and enough cruft to limits.h to make it compile lzo,
126: lzop and bzip2.
1.28 fefe 127: added mktime, asctime_r, asctime and ctime (needed for gzip).
128: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 129: format some day (man tzfile, ugh!) :-(
1.29 fefe 130: added unlink prototype to unistd.h.
131: added gmtime and gmtime_r.
1.31 fefe 132: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 133: removed readdir glibc compatibility cruft.
1.31 fefe 134: removed stat glibc compatibility cruft.
1.32 fefe 135: oops, my fread was broken for pipes.
1.33 fefe 136: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 137:
1.9 fefe 138: 0.7.1:
1.11 fefe 139: optimized away the static arrays from __ltostr and __lltostr.
140: optimized away the static arrays (and more!) from strtoul and strtoull.
141: added system (by Olaf).
1.12 fefe 142: added tolower and toupper
1.13 fefe 143: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 144: added clone for mips (by Olaf).
145: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 146: added pause for all (by Olaf).
1.17 fefe 147: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 148: added isupper and islower.
149: added putc and putchar as macros.
1.17 fefe 150: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
151: insightful discussions and patches I partially used for the last three)
1.18 fefe 152: added getpriority and setpriority (also by Abraham)
1.19 fefe 153: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 154: oi, setjmp and longjmp were broken on other platforms, too!
155: Thanks to Sébastien Côté for reporting this.
1.9 fefe 156:
157: 0.7:
1.6 olaf 158: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 159: Initial dynamic loading glue for i386, also by Olaf.
160: We don't have a dynamic loader yet, so this is not yet usable.
161: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
162: vsprintf, writev, all by Olaf.
1.2 fefe 163: imported readdir fix from Guillaume. Mhh, can the kernel interface
164: really be this broken?
1.3 fefe 165: Found a kludgy way to detect whether the kernel includes define struct
166: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
167: not work for you, please tell me!
1.4 fefe 168: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 169: Fixed stdio line buffering. The code was already there but I forgot
170: to mark stdio and stdout as line buffered. This should really be
171: done dynamically using isatty, though.
1.8 fefe 172: Removed superfluous "if (1)" in execvp.c
1.1 cvs 173:
174: 0.6.14:
175: *scanf did not append the 0 byte for %s.
176: added creat and changed creat to call open directly instead of open64.
177: did for fread what 0.6.10 did for fwrite.
178: repaired buffered stdio a little (line buffering is still not
179: supported).
180: [All of these bugs have been reported by Guillaume. Thanks!]
181: added __pure__ to strchr and strrchr in <string.h>
182:
183: 0.6.13:
184: included COPYING to make clear that the diet libc is covered by the
185: GNU General Public License (and _not_ the LGPL). That means that
186: you need to obtain a license from me if you want to use the diet
187: libc in a proprietary program that you want to distribute.
188: The x86 unified syscall swapped arguments #4 and #5 and noone
189: noticed until now! Thanks to Guillaume Cottenceau for reporting
190: this!
191: The malloc had a subtle bug with small allocations that could cause
192: segfault. Guillaume reported it, Olaf fixed it.
193:
194: 0.6.12:
195: added assert, statfs and fstatfs
196: added include/net/if.h so fget compiles again.
197:
198: 0.6.11:
199: added putenv.
200:
201: 0.6.10:
202: fixed fwrite. It returned the number of bytes written, not the number
203: of records. Thanks to Albert D. Cahalan for pointing this out.
204: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
205: added brk and sbrk. harold@nb.com.sg made me do it.
206:
207: 0.6.9:
208: fixed execvp not to return on ENOENT
209: did for {open|read|close|seek|tell}dir what I did for stat before.
210: The glibc compatibility part is currently non-functional.
211: fixed white space handling in sscanf " (" would not match " (".
212: fixed printf to accept 'l' flag.
213: fixed getpwuid (ignored last line)
214:
215: 0.6.8:
216: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
217: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
218: added strlcpy and strlcat from OpenBSD.
219: added stat64, fstat64 and lstat64.
220: added endian.h and made ending of strlen.c endianness-aware
221: added string routines size tweak to dietfeatures.h. Most of the
222: string routines have been unrolled. This is up to three times as
223: fast but creates up to three times larger code. Now you can disable
224: the unrolling.
225: added sendfile.
226: I also added pread. It works on x86 and sparc but not on ppc and mips.
227: I have no idea what's going on. strace disagrees with the kernel.
228: Can anyone help? I asked the Linux kernel mailing list for help, too.
229: added a few aliases of the type __libc_open for open. nm on
230: libpthreads.so indicates that we will need them.
231:
232: 0.6.7:
233: the sources now compile without warnings with -Wall.
234: printf now prints "(null)" when %s is passed NULL. This can be
235: removed with WANT_NULL_PRINTF in dietfeatures.h
236: added vfprintf, execl, ttyname.
237: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
238: __dietfstat so they can use the normal kernel struct stat.
239: stat, lstat and fstat are now C wrappers that convert to the glibc
240: struct stat. So we can avoid that overhead for programs that use
241: dietlibc headers.
242:
243: 0.6.6:
244: changed the Makefiles so you can now set CFLAGS on the command line
245: added memccmp (analogous to memccpy) and strncmp.
246: Olaf fixed another bug in the sparc unified syscall.
247: Paul Clifford contributed a C version of his strlen.S that is much
248: more efficient than the previous strlen on all platforms! It also
249: looks like technology from Roswell. ;-}
250: added a "real" stdio. Well, almost. Please contribute!
251: added dietfeatures.h so you can remove features you don't need.
252: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
253: stdio now works with simple programs and minigzip from libz.
254: stdio uses some major trickery to avoid linking the stdio, stderr and
255: stdout (and reserving space for them) when they are not used.
256:
257: 0.6.5:
258: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
259: most of them bugs in the new header files, but also missing sigset
260: functions.
261: Paul Clifford contributed an assembly strlen.S for ARM and fixed
262: several bugs.
263: Fixed ppc/setjmp and mips/pipe.
264: Olaf contributed a new sparc unified syscall.
265:
266: 0.6.4:
267: declared is* static inline in getservent.
268: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
269: changed strlen to return 0 when passed NULL.
270: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
271: Scientist who actually implemented this without access to a MIPS
272: box, just from reading the architecture manual. And it worked out
273: of the box.
274: started a set of system includes, mainly so that I can use lcc and
275: my alpha-linux cross compiler (which is unable to cross-compile
276: glibc). diet libc can now be compiled without any include files
277: from a normal libc. The includes do declare more than diet libc
278: currently delivers and they are still far from complete for real
279: applications.
280: I will only add assembly versions that are smaller _and_ faster than
281: the C version. Larger routines are only accepted if they are called
282: very often and are substantially faster.
283: added i386 assembly strchr, which is smaller and faster than the old
284: version. It is, however, larger than the version contributed by
285: proton (thanks, anyway).
286: added i386 strlen (31% faster, 14% smaller)
287: "make t" will now create a map file called "mapfile".
288:
289: 0.6.3:
290: added sys_errlist, strerror and perror
291: added isblank
292: added atol
293:
294: 0.6.2:
295: mmap for ARM didn't compile. Thanks, Paul!
296:
297: 0.6.1:
298: split mmap into the architecture specific subdirectories.
299: getenv now copes with environ==NULL, thanks Paul Clifford.
300: Paul also contributed a smaller ARM startup code.
301:
302: 0.6:
303: strcat returned the wrong result. Thanks, Dietz Pröpper.
304: strtod now understands a negative exponent (oops, thanks Bertram Barth)
305: Port to arm-linux-gnu, but on the Netwinder I use for testing the
306: __dtostr does not work (I have no idea why!)
307: The MIPS port now uses (much smaller) non-PIC code. That means that
308: the applications you link against diet libc also have to be compiled
309: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
310: Thanks to Ralf Bächle for helping me with this!
311: I made subdirectories for the architectures and use VPATH to override
312: VPATH so that make finds the source file automatically. That should
313: simplify the sources greatly.
314: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
315: ARM and MIPS now also have setjmp and longjmp
316: "compile" and "load" are now make targets. Use them for djb programs.
317: added contrib/elftrunc.c which will remove unnecessary ELF headers.
318: Again, contributed from Olaf. Great work!
319:
320: 0.5.12:
321: printf also does signed numbers.
322: If you don't use atexit, dietlibc now does not link exit, only _exit.
323: *printf now correctly returns the number of bytes written.
324: Olaf contributed experimental sscanf and vsscanf implementations.
325: If passed NULL as buffer, snprintf will not write anything but still
326: return the number of bytes it would have written.
327: Initial MIPS port! (Oh, the agony!)
328: No setjmp and longjmp support yet! Please contribute!
329: I even implemented unified syscalls for MIPS. Still, MIPS code is
330: almost twice the size of SPARC code. If anyone knows why: please
331: tell me!
332:
333: 0.5.11:
334: I implemented new unified syscalls for x86, sparc and ppc, this time based
335: on .s files and not .c files, and I moved the syscalls into
336: subdirectores to clean the dietlibc sources up a little.
337: A binary consisting of printf("%s is %d\n","olaf",23) is now
338: 2864 bytes on sparc
339: 2488 bytes on intel
340: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
341: to make a few more applications work.
342: Olaf Dreesen also implemented some unified syscall stuff for x86.
343: He discovered that with our unified syscall interface it actually
344: costs <10 bytes total to make all system calls thread safe!
345: I implemented atexit() (can register up to 4 callbacks).
346: I implemented strtod and __dtostr (the opposite). Now we can add
347: floating point support to vsnprintf and sscanf!
348:
349: 0.5.10:
350: I actually saw that I can not only merge the errno handling code of
351: the system calls on x86, I can also merge the rest (including the
352: arguments) except for setting the system call number. All those
353: system calls are now just a jump to a unified system call handler.
354: I got rid of x86openclose again. The savings are substantial:
355: chown from embutils went from 7664 to 7184 bytes!
356: If I'd move the system call wrappers to assembly language, I could
357: even reduce the alignment (does not matter since it's just a jump
358: anyway) and get rid of the "ret" behind each jump (one byte per
359: system call!)
360:
361: 0.5.9:
362: added memchr, strpbrk, strstr, strtol, isspace (hehe)
363: fixed strdup
364: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
365: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
366: (no signed integers, only strings and unsigned integers (but
367: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
368: that code must be wonderful, I don't understand it at all *bg*)
369: Olaf's printf does understand padding like in "%08d" and "%8d" and
370: automatically pads pointers with '0'.
371: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
372: Thanks to proton for inspiration on this.
373: The new x86 start code also does not reference exit any more, thus saving
374: 64 bytes for executables that don't call exit explicitly.
375: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
376: Moved errno and environ to start.S, saving no byte binary size but
377: speeding up compilation and slightly shortening dietlibc.a ;-)
378: For x86: joined open and close into one assembler file, sharing the
379: errno handling. This is a feasibility test and it actually saves a
380: few bytes. I think I will reimplement the _syscall[1-6] macros on
381: all platforms now to share the errno handling code for them.
382:
383: 0.5.8:
384: fixed strchr to be able to look for 0.
385:
386: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
387: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
388: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
389: contributed by Olaf Dreesen)
390:
391: added execvp, getcwd
392:
393: fixed __xmknod
394:
395: Note: can it be that the ftw interface really is so broken that I
396: cannot implement it without having to implement some searching data
397: structure? I included an experimental ftw implementation that will
398: not follow symlinks.
399:
400: 0.5.7:
401: oops, if_nametoindex was broken!
402:
403: 0.5.6:
404: ported to ppc-linux.
405: fixed i386 sigsetjmp (I mistyped the function name)
406: included sigjmp.c
407:
408: 0.5.5:
409: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
410: actually, it wasn't fork that wasn't working for sparc, it was pipe.
411: I fixed it now.
412: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
413: fixed readdir to use getdents and not the intel inline asm
414:
415: 0.5.4:
416: ported to sparclinux (sparc32 only). Beware: does not work yet.
417: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
418:
419: 0.5.3:
420: added tcsetattr and getenv to compile e3
421:
422: 0.5.2:
423: added vhangup, tcgetattr, isatty and memcmp for fgetty
424: (http://www.fefe.de/fgetty/)
425: added localtime from uC-libc.
426:
427: 0.5.1:
428: stat and friends actually work now. Yuck! Another case of
429: translation between kernel and userland. Why can't the kernel
430: people and the libc people simply agree on a standard?
431: removed many unnecessary includes to speed up compilation.
432: added -fomit-frame-pointer and i386 compilation target to reduce code size.
433: inlined socketcall to reduce code size.
434: "load" and "compile" are examples for djb code.
435:
436: 0.5:
437: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
438: each object file is now treated with "strip -x -R .note -R .comment"
439: split each system call into a separate object file
440: added ntohs, htons, alarm, if_indextoname and if_nametoindex
441:
442: 0.4.1:
443: oops, the strchr implementation was wrong. Thanks Jens Laas!
444:
445: 0.4:
446: copied opendir and friends from uC-libc.
447: added getservent and getservby* in gerservent.c
448:
449: 0.3:
450: remove readdir system call
451: added getdents system call
452: added getpwnam/getpwuid implementation in getpwnam.c
453: added a few string functions (in str*.c)
454:
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