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