Annotation of dietlibc/CHANGES, revision 1.86
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!!!).
1.86 ! fefe 21: add llseek.
1.74 fefe 22:
1.73 fefe 23: 0.9:
1.65 fefe 24: fixed initgroups (oops)
1.66 fefe 25: Cleanup appending file open for stdio (thanks, James Antill)
26: imported vfprintf fix from James Antill.
1.67 fefe 27: add fnmatch
28: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 29: Olaf added character classes to *scanf.
1.69 fefe 30: Put object and library files into a separate directory (bin-$ARCH).
31: Add "cross" make target to make all architectures.
32: Add "diet" program and man page.
1.70 fefe 33: Add getgrnam, getgrgid
1.71 fefe 34: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 35: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 36:
1.64 fefe 37: 0.8:
1.34 fefe 38: vsnprintf(0,...) estimated the length of strings with a padding width
39: incorrectly.
1.35 fefe 40: new reboot() from Olaf.
1.36 fefe 41: added prototypes for getsockopt and setsockopt.
1.39 fefe 42: added experimental sem* and shm*
1.38 fefe 43: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 44: added setvbuf (only changes mode, not buffer)
1.41 fefe 45: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
46: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 47: added qsort() and bsearch(). Benchmark on 1000 random ints:
48: glibc: 679414 cycles qsort and 3352 cycles bsearch
49: diet libc: 300010 cycles qsort, 553 cycles bsearch
50: I have no idea why glibc is so slow.
1.43 fefe 51: added __isnan (references by libm.a from glibc).
52: added popen() and pclose(). Now the diet libc can link slsh (from
53: S-Lang!)
1.44 fefe 54: corrected usleep. It was more of an msleep until now.
1.45 fefe 55: corrected __dtostr (it looped when trying to format "0.0").
56: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 57: added ungetc (does it work?)
1.47 fefe 58: added inet_aton (yuck!)
1.50 fefe 59: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 60: added h_errno and __h_errno_location
61: added inet_ntoa
1.49 fefe 62: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 63: add bcopy, index, rindex macros
64: add isgraph and isxdigit
1.52 fefe 65: add strftime (ugh!!!)
1.53 olaf 66: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 67: Jeff Garzik contributed a spec file. I put it in contrib and hope
68: everbody knows what to do with it...
69: Olaf checked in a ton of libpthread stuff.
1.55 fefe 70: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 71: add large file backwards compatibility support (so gzip will run on
72: kernel 2.2 and 2.0)
1.57 fefe 73: added shutdown
1.58 fefe 74: added nice
75: added pseudo-locale support for is* (they are now weak aliases,
76: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
77: overwrite the default is* functions.
1.59 fefe 78: added liblatin1.a
1.60 fefe 79: added tzfile implementation (does it work for anyone else?)
1.61 fefe 80: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 81: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
82: Thanks!
1.63 fefe 83: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 84:
1.21 fefe 85: 0.7.2:
86: added several prototypes to already implemented functions and
87: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 88: added prototypes for process group and dup syscalls. Thanks to
89: Abraham again. He also contributed an implementation for daemon(),
90: an ugly BSD hack. I decided to diversify the lib/ directory a
91: little and now created a libugly/ directory for stuff like system()
92: and daemon() ;-)
93: added libstdio and moved all that stdio crap from lib/ there. The
94: idea is to start separating now what we will separate for shared
95: libraries anyway.
1.26 fefe 96: optimized x86 unified-syscall by Olaf.
1.27 fefe 97: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
98: limits.h instead)
99: added remove.c and enough cruft to limits.h to make it compile lzo,
100: lzop and bzip2.
1.28 fefe 101: added mktime, asctime_r, asctime and ctime (needed for gzip).
102: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 103: format some day (man tzfile, ugh!) :-(
1.29 fefe 104: added unlink prototype to unistd.h.
105: added gmtime and gmtime_r.
1.31 fefe 106: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 107: removed readdir glibc compatibility cruft.
1.31 fefe 108: removed stat glibc compatibility cruft.
1.32 fefe 109: oops, my fread was broken for pipes.
1.33 fefe 110: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 111:
1.9 fefe 112: 0.7.1:
1.11 fefe 113: optimized away the static arrays from __ltostr and __lltostr.
114: optimized away the static arrays (and more!) from strtoul and strtoull.
115: added system (by Olaf).
1.12 fefe 116: added tolower and toupper
1.13 fefe 117: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 118: added clone for mips (by Olaf).
119: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 120: added pause for all (by Olaf).
1.17 fefe 121: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 122: added isupper and islower.
123: added putc and putchar as macros.
1.17 fefe 124: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
125: insightful discussions and patches I partially used for the last three)
1.18 fefe 126: added getpriority and setpriority (also by Abraham)
1.19 fefe 127: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 128: oi, setjmp and longjmp were broken on other platforms, too!
129: Thanks to Sébastien Côté for reporting this.
1.9 fefe 130:
131: 0.7:
1.6 olaf 132: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 133: Initial dynamic loading glue for i386, also by Olaf.
134: We don't have a dynamic loader yet, so this is not yet usable.
135: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
136: vsprintf, writev, all by Olaf.
1.2 fefe 137: imported readdir fix from Guillaume. Mhh, can the kernel interface
138: really be this broken?
1.3 fefe 139: Found a kludgy way to detect whether the kernel includes define struct
140: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
141: not work for you, please tell me!
1.4 fefe 142: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 143: Fixed stdio line buffering. The code was already there but I forgot
144: to mark stdio and stdout as line buffered. This should really be
145: done dynamically using isatty, though.
1.8 fefe 146: Removed superfluous "if (1)" in execvp.c
1.1 cvs 147:
148: 0.6.14:
149: *scanf did not append the 0 byte for %s.
150: added creat and changed creat to call open directly instead of open64.
151: did for fread what 0.6.10 did for fwrite.
152: repaired buffered stdio a little (line buffering is still not
153: supported).
154: [All of these bugs have been reported by Guillaume. Thanks!]
155: added __pure__ to strchr and strrchr in <string.h>
156:
157: 0.6.13:
158: included COPYING to make clear that the diet libc is covered by the
159: GNU General Public License (and _not_ the LGPL). That means that
160: you need to obtain a license from me if you want to use the diet
161: libc in a proprietary program that you want to distribute.
162: The x86 unified syscall swapped arguments #4 and #5 and noone
163: noticed until now! Thanks to Guillaume Cottenceau for reporting
164: this!
165: The malloc had a subtle bug with small allocations that could cause
166: segfault. Guillaume reported it, Olaf fixed it.
167:
168: 0.6.12:
169: added assert, statfs and fstatfs
170: added include/net/if.h so fget compiles again.
171:
172: 0.6.11:
173: added putenv.
174:
175: 0.6.10:
176: fixed fwrite. It returned the number of bytes written, not the number
177: of records. Thanks to Albert D. Cahalan for pointing this out.
178: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
179: added brk and sbrk. harold@nb.com.sg made me do it.
180:
181: 0.6.9:
182: fixed execvp not to return on ENOENT
183: did for {open|read|close|seek|tell}dir what I did for stat before.
184: The glibc compatibility part is currently non-functional.
185: fixed white space handling in sscanf " (" would not match " (".
186: fixed printf to accept 'l' flag.
187: fixed getpwuid (ignored last line)
188:
189: 0.6.8:
190: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
191: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
192: added strlcpy and strlcat from OpenBSD.
193: added stat64, fstat64 and lstat64.
194: added endian.h and made ending of strlen.c endianness-aware
195: added string routines size tweak to dietfeatures.h. Most of the
196: string routines have been unrolled. This is up to three times as
197: fast but creates up to three times larger code. Now you can disable
198: the unrolling.
199: added sendfile.
200: I also added pread. It works on x86 and sparc but not on ppc and mips.
201: I have no idea what's going on. strace disagrees with the kernel.
202: Can anyone help? I asked the Linux kernel mailing list for help, too.
203: added a few aliases of the type __libc_open for open. nm on
204: libpthreads.so indicates that we will need them.
205:
206: 0.6.7:
207: the sources now compile without warnings with -Wall.
208: printf now prints "(null)" when %s is passed NULL. This can be
209: removed with WANT_NULL_PRINTF in dietfeatures.h
210: added vfprintf, execl, ttyname.
211: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
212: __dietfstat so they can use the normal kernel struct stat.
213: stat, lstat and fstat are now C wrappers that convert to the glibc
214: struct stat. So we can avoid that overhead for programs that use
215: dietlibc headers.
216:
217: 0.6.6:
218: changed the Makefiles so you can now set CFLAGS on the command line
219: added memccmp (analogous to memccpy) and strncmp.
220: Olaf fixed another bug in the sparc unified syscall.
221: Paul Clifford contributed a C version of his strlen.S that is much
222: more efficient than the previous strlen on all platforms! It also
223: looks like technology from Roswell. ;-}
224: added a "real" stdio. Well, almost. Please contribute!
225: added dietfeatures.h so you can remove features you don't need.
226: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
227: stdio now works with simple programs and minigzip from libz.
228: stdio uses some major trickery to avoid linking the stdio, stderr and
229: stdout (and reserving space for them) when they are not used.
230:
231: 0.6.5:
232: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
233: most of them bugs in the new header files, but also missing sigset
234: functions.
235: Paul Clifford contributed an assembly strlen.S for ARM and fixed
236: several bugs.
237: Fixed ppc/setjmp and mips/pipe.
238: Olaf contributed a new sparc unified syscall.
239:
240: 0.6.4:
241: declared is* static inline in getservent.
242: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
243: changed strlen to return 0 when passed NULL.
244: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
245: Scientist who actually implemented this without access to a MIPS
246: box, just from reading the architecture manual. And it worked out
247: of the box.
248: started a set of system includes, mainly so that I can use lcc and
249: my alpha-linux cross compiler (which is unable to cross-compile
250: glibc). diet libc can now be compiled without any include files
251: from a normal libc. The includes do declare more than diet libc
252: currently delivers and they are still far from complete for real
253: applications.
254: I will only add assembly versions that are smaller _and_ faster than
255: the C version. Larger routines are only accepted if they are called
256: very often and are substantially faster.
257: added i386 assembly strchr, which is smaller and faster than the old
258: version. It is, however, larger than the version contributed by
259: proton (thanks, anyway).
260: added i386 strlen (31% faster, 14% smaller)
261: "make t" will now create a map file called "mapfile".
262:
263: 0.6.3:
264: added sys_errlist, strerror and perror
265: added isblank
266: added atol
267:
268: 0.6.2:
269: mmap for ARM didn't compile. Thanks, Paul!
270:
271: 0.6.1:
272: split mmap into the architecture specific subdirectories.
273: getenv now copes with environ==NULL, thanks Paul Clifford.
274: Paul also contributed a smaller ARM startup code.
275:
276: 0.6:
277: strcat returned the wrong result. Thanks, Dietz Pröpper.
278: strtod now understands a negative exponent (oops, thanks Bertram Barth)
279: Port to arm-linux-gnu, but on the Netwinder I use for testing the
280: __dtostr does not work (I have no idea why!)
281: The MIPS port now uses (much smaller) non-PIC code. That means that
282: the applications you link against diet libc also have to be compiled
283: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
284: Thanks to Ralf Bächle for helping me with this!
285: I made subdirectories for the architectures and use VPATH to override
286: VPATH so that make finds the source file automatically. That should
287: simplify the sources greatly.
288: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
289: ARM and MIPS now also have setjmp and longjmp
290: "compile" and "load" are now make targets. Use them for djb programs.
291: added contrib/elftrunc.c which will remove unnecessary ELF headers.
292: Again, contributed from Olaf. Great work!
293:
294: 0.5.12:
295: printf also does signed numbers.
296: If you don't use atexit, dietlibc now does not link exit, only _exit.
297: *printf now correctly returns the number of bytes written.
298: Olaf contributed experimental sscanf and vsscanf implementations.
299: If passed NULL as buffer, snprintf will not write anything but still
300: return the number of bytes it would have written.
301: Initial MIPS port! (Oh, the agony!)
302: No setjmp and longjmp support yet! Please contribute!
303: I even implemented unified syscalls for MIPS. Still, MIPS code is
304: almost twice the size of SPARC code. If anyone knows why: please
305: tell me!
306:
307: 0.5.11:
308: I implemented new unified syscalls for x86, sparc and ppc, this time based
309: on .s files and not .c files, and I moved the syscalls into
310: subdirectores to clean the dietlibc sources up a little.
311: A binary consisting of printf("%s is %d\n","olaf",23) is now
312: 2864 bytes on sparc
313: 2488 bytes on intel
314: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
315: to make a few more applications work.
316: Olaf Dreesen also implemented some unified syscall stuff for x86.
317: He discovered that with our unified syscall interface it actually
318: costs <10 bytes total to make all system calls thread safe!
319: I implemented atexit() (can register up to 4 callbacks).
320: I implemented strtod and __dtostr (the opposite). Now we can add
321: floating point support to vsnprintf and sscanf!
322:
323: 0.5.10:
324: I actually saw that I can not only merge the errno handling code of
325: the system calls on x86, I can also merge the rest (including the
326: arguments) except for setting the system call number. All those
327: system calls are now just a jump to a unified system call handler.
328: I got rid of x86openclose again. The savings are substantial:
329: chown from embutils went from 7664 to 7184 bytes!
330: If I'd move the system call wrappers to assembly language, I could
331: even reduce the alignment (does not matter since it's just a jump
332: anyway) and get rid of the "ret" behind each jump (one byte per
333: system call!)
334:
335: 0.5.9:
336: added memchr, strpbrk, strstr, strtol, isspace (hehe)
337: fixed strdup
338: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
339: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
340: (no signed integers, only strings and unsigned integers (but
341: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
342: that code must be wonderful, I don't understand it at all *bg*)
343: Olaf's printf does understand padding like in "%08d" and "%8d" and
344: automatically pads pointers with '0'.
345: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
346: Thanks to proton for inspiration on this.
347: The new x86 start code also does not reference exit any more, thus saving
348: 64 bytes for executables that don't call exit explicitly.
349: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
350: Moved errno and environ to start.S, saving no byte binary size but
351: speeding up compilation and slightly shortening dietlibc.a ;-)
352: For x86: joined open and close into one assembler file, sharing the
353: errno handling. This is a feasibility test and it actually saves a
354: few bytes. I think I will reimplement the _syscall[1-6] macros on
355: all platforms now to share the errno handling code for them.
356:
357: 0.5.8:
358: fixed strchr to be able to look for 0.
359:
360: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
361: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
362: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
363: contributed by Olaf Dreesen)
364:
365: added execvp, getcwd
366:
367: fixed __xmknod
368:
369: Note: can it be that the ftw interface really is so broken that I
370: cannot implement it without having to implement some searching data
371: structure? I included an experimental ftw implementation that will
372: not follow symlinks.
373:
374: 0.5.7:
375: oops, if_nametoindex was broken!
376:
377: 0.5.6:
378: ported to ppc-linux.
379: fixed i386 sigsetjmp (I mistyped the function name)
380: included sigjmp.c
381:
382: 0.5.5:
383: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
384: actually, it wasn't fork that wasn't working for sparc, it was pipe.
385: I fixed it now.
386: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
387: fixed readdir to use getdents and not the intel inline asm
388:
389: 0.5.4:
390: ported to sparclinux (sparc32 only). Beware: does not work yet.
391: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
392:
393: 0.5.3:
394: added tcsetattr and getenv to compile e3
395:
396: 0.5.2:
397: added vhangup, tcgetattr, isatty and memcmp for fgetty
398: (http://www.fefe.de/fgetty/)
399: added localtime from uC-libc.
400:
401: 0.5.1:
402: stat and friends actually work now. Yuck! Another case of
403: translation between kernel and userland. Why can't the kernel
404: people and the libc people simply agree on a standard?
405: removed many unnecessary includes to speed up compilation.
406: added -fomit-frame-pointer and i386 compilation target to reduce code size.
407: inlined socketcall to reduce code size.
408: "load" and "compile" are examples for djb code.
409:
410: 0.5:
411: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
412: each object file is now treated with "strip -x -R .note -R .comment"
413: split each system call into a separate object file
414: added ntohs, htons, alarm, if_indextoname and if_nametoindex
415:
416: 0.4.1:
417: oops, the strchr implementation was wrong. Thanks Jens Laas!
418:
419: 0.4:
420: copied opendir and friends from uC-libc.
421: added getservent and getservby* in gerservent.c
422:
423: 0.3:
424: remove readdir system call
425: added getdents system call
426: added getpwnam/getpwuid implementation in getpwnam.c
427: added a few string functions (in str*.c)
428:
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