Annotation of dietlibc/CHANGES, revision 1.75
1.74 fefe 1: 0.10:
2: update getpagesize.
3: add personality.
1.75 ! fefe 4: add "%*s" and "%*.*s" support to vsnprintf.
1.74 fefe 5:
1.73 fefe 6: 0.9:
1.65 fefe 7: fixed initgroups (oops)
1.66 fefe 8: Cleanup appending file open for stdio (thanks, James Antill)
9: imported vfprintf fix from James Antill.
1.67 fefe 10: add fnmatch
11: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 12: Olaf added character classes to *scanf.
1.69 fefe 13: Put object and library files into a separate directory (bin-$ARCH).
14: Add "cross" make target to make all architectures.
15: Add "diet" program and man page.
1.70 fefe 16: Add getgrnam, getgrgid
1.71 fefe 17: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 18: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 19:
1.64 fefe 20: 0.8:
1.34 fefe 21: vsnprintf(0,...) estimated the length of strings with a padding width
22: incorrectly.
1.35 fefe 23: new reboot() from Olaf.
1.36 fefe 24: added prototypes for getsockopt and setsockopt.
1.39 fefe 25: added experimental sem* and shm*
1.38 fefe 26: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 27: added setvbuf (only changes mode, not buffer)
1.41 fefe 28: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
29: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 30: added qsort() and bsearch(). Benchmark on 1000 random ints:
31: glibc: 679414 cycles qsort and 3352 cycles bsearch
32: diet libc: 300010 cycles qsort, 553 cycles bsearch
33: I have no idea why glibc is so slow.
1.43 fefe 34: added __isnan (references by libm.a from glibc).
35: added popen() and pclose(). Now the diet libc can link slsh (from
36: S-Lang!)
1.44 fefe 37: corrected usleep. It was more of an msleep until now.
1.45 fefe 38: corrected __dtostr (it looped when trying to format "0.0").
39: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 40: added ungetc (does it work?)
1.47 fefe 41: added inet_aton (yuck!)
1.50 fefe 42: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 43: added h_errno and __h_errno_location
44: added inet_ntoa
1.49 fefe 45: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 46: add bcopy, index, rindex macros
47: add isgraph and isxdigit
1.52 fefe 48: add strftime (ugh!!!)
1.53 olaf 49: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 50: Jeff Garzik contributed a spec file. I put it in contrib and hope
51: everbody knows what to do with it...
52: Olaf checked in a ton of libpthread stuff.
1.55 fefe 53: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 54: add large file backwards compatibility support (so gzip will run on
55: kernel 2.2 and 2.0)
1.57 fefe 56: added shutdown
1.58 fefe 57: added nice
58: added pseudo-locale support for is* (they are now weak aliases,
59: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
60: overwrite the default is* functions.
1.59 fefe 61: added liblatin1.a
1.60 fefe 62: added tzfile implementation (does it work for anyone else?)
1.61 fefe 63: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 64: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
65: Thanks!
1.63 fefe 66: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 67:
1.21 fefe 68: 0.7.2:
69: added several prototypes to already implemented functions and
70: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 71: added prototypes for process group and dup syscalls. Thanks to
72: Abraham again. He also contributed an implementation for daemon(),
73: an ugly BSD hack. I decided to diversify the lib/ directory a
74: little and now created a libugly/ directory for stuff like system()
75: and daemon() ;-)
76: added libstdio and moved all that stdio crap from lib/ there. The
77: idea is to start separating now what we will separate for shared
78: libraries anyway.
1.26 fefe 79: optimized x86 unified-syscall by Olaf.
1.27 fefe 80: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
81: limits.h instead)
82: added remove.c and enough cruft to limits.h to make it compile lzo,
83: lzop and bzip2.
1.28 fefe 84: added mktime, asctime_r, asctime and ctime (needed for gzip).
85: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 86: format some day (man tzfile, ugh!) :-(
1.29 fefe 87: added unlink prototype to unistd.h.
88: added gmtime and gmtime_r.
1.31 fefe 89: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 90: removed readdir glibc compatibility cruft.
1.31 fefe 91: removed stat glibc compatibility cruft.
1.32 fefe 92: oops, my fread was broken for pipes.
1.33 fefe 93: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 94:
1.9 fefe 95: 0.7.1:
1.11 fefe 96: optimized away the static arrays from __ltostr and __lltostr.
97: optimized away the static arrays (and more!) from strtoul and strtoull.
98: added system (by Olaf).
1.12 fefe 99: added tolower and toupper
1.13 fefe 100: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 101: added clone for mips (by Olaf).
102: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 103: added pause for all (by Olaf).
1.17 fefe 104: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 105: added isupper and islower.
106: added putc and putchar as macros.
1.17 fefe 107: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
108: insightful discussions and patches I partially used for the last three)
1.18 fefe 109: added getpriority and setpriority (also by Abraham)
1.19 fefe 110: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 111: oi, setjmp and longjmp were broken on other platforms, too!
112: Thanks to Sébastien Côté for reporting this.
1.9 fefe 113:
114: 0.7:
1.6 olaf 115: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 116: Initial dynamic loading glue for i386, also by Olaf.
117: We don't have a dynamic loader yet, so this is not yet usable.
118: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
119: vsprintf, writev, all by Olaf.
1.2 fefe 120: imported readdir fix from Guillaume. Mhh, can the kernel interface
121: really be this broken?
1.3 fefe 122: Found a kludgy way to detect whether the kernel includes define struct
123: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
124: not work for you, please tell me!
1.4 fefe 125: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 126: Fixed stdio line buffering. The code was already there but I forgot
127: to mark stdio and stdout as line buffered. This should really be
128: done dynamically using isatty, though.
1.8 fefe 129: Removed superfluous "if (1)" in execvp.c
1.1 cvs 130:
131: 0.6.14:
132: *scanf did not append the 0 byte for %s.
133: added creat and changed creat to call open directly instead of open64.
134: did for fread what 0.6.10 did for fwrite.
135: repaired buffered stdio a little (line buffering is still not
136: supported).
137: [All of these bugs have been reported by Guillaume. Thanks!]
138: added __pure__ to strchr and strrchr in <string.h>
139:
140: 0.6.13:
141: included COPYING to make clear that the diet libc is covered by the
142: GNU General Public License (and _not_ the LGPL). That means that
143: you need to obtain a license from me if you want to use the diet
144: libc in a proprietary program that you want to distribute.
145: The x86 unified syscall swapped arguments #4 and #5 and noone
146: noticed until now! Thanks to Guillaume Cottenceau for reporting
147: this!
148: The malloc had a subtle bug with small allocations that could cause
149: segfault. Guillaume reported it, Olaf fixed it.
150:
151: 0.6.12:
152: added assert, statfs and fstatfs
153: added include/net/if.h so fget compiles again.
154:
155: 0.6.11:
156: added putenv.
157:
158: 0.6.10:
159: fixed fwrite. It returned the number of bytes written, not the number
160: of records. Thanks to Albert D. Cahalan for pointing this out.
161: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
162: added brk and sbrk. harold@nb.com.sg made me do it.
163:
164: 0.6.9:
165: fixed execvp not to return on ENOENT
166: did for {open|read|close|seek|tell}dir what I did for stat before.
167: The glibc compatibility part is currently non-functional.
168: fixed white space handling in sscanf " (" would not match " (".
169: fixed printf to accept 'l' flag.
170: fixed getpwuid (ignored last line)
171:
172: 0.6.8:
173: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
174: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
175: added strlcpy and strlcat from OpenBSD.
176: added stat64, fstat64 and lstat64.
177: added endian.h and made ending of strlen.c endianness-aware
178: added string routines size tweak to dietfeatures.h. Most of the
179: string routines have been unrolled. This is up to three times as
180: fast but creates up to three times larger code. Now you can disable
181: the unrolling.
182: added sendfile.
183: I also added pread. It works on x86 and sparc but not on ppc and mips.
184: I have no idea what's going on. strace disagrees with the kernel.
185: Can anyone help? I asked the Linux kernel mailing list for help, too.
186: added a few aliases of the type __libc_open for open. nm on
187: libpthreads.so indicates that we will need them.
188:
189: 0.6.7:
190: the sources now compile without warnings with -Wall.
191: printf now prints "(null)" when %s is passed NULL. This can be
192: removed with WANT_NULL_PRINTF in dietfeatures.h
193: added vfprintf, execl, ttyname.
194: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
195: __dietfstat so they can use the normal kernel struct stat.
196: stat, lstat and fstat are now C wrappers that convert to the glibc
197: struct stat. So we can avoid that overhead for programs that use
198: dietlibc headers.
199:
200: 0.6.6:
201: changed the Makefiles so you can now set CFLAGS on the command line
202: added memccmp (analogous to memccpy) and strncmp.
203: Olaf fixed another bug in the sparc unified syscall.
204: Paul Clifford contributed a C version of his strlen.S that is much
205: more efficient than the previous strlen on all platforms! It also
206: looks like technology from Roswell. ;-}
207: added a "real" stdio. Well, almost. Please contribute!
208: added dietfeatures.h so you can remove features you don't need.
209: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
210: stdio now works with simple programs and minigzip from libz.
211: stdio uses some major trickery to avoid linking the stdio, stderr and
212: stdout (and reserving space for them) when they are not used.
213:
214: 0.6.5:
215: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
216: most of them bugs in the new header files, but also missing sigset
217: functions.
218: Paul Clifford contributed an assembly strlen.S for ARM and fixed
219: several bugs.
220: Fixed ppc/setjmp and mips/pipe.
221: Olaf contributed a new sparc unified syscall.
222:
223: 0.6.4:
224: declared is* static inline in getservent.
225: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
226: changed strlen to return 0 when passed NULL.
227: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
228: Scientist who actually implemented this without access to a MIPS
229: box, just from reading the architecture manual. And it worked out
230: of the box.
231: started a set of system includes, mainly so that I can use lcc and
232: my alpha-linux cross compiler (which is unable to cross-compile
233: glibc). diet libc can now be compiled without any include files
234: from a normal libc. The includes do declare more than diet libc
235: currently delivers and they are still far from complete for real
236: applications.
237: I will only add assembly versions that are smaller _and_ faster than
238: the C version. Larger routines are only accepted if they are called
239: very often and are substantially faster.
240: added i386 assembly strchr, which is smaller and faster than the old
241: version. It is, however, larger than the version contributed by
242: proton (thanks, anyway).
243: added i386 strlen (31% faster, 14% smaller)
244: "make t" will now create a map file called "mapfile".
245:
246: 0.6.3:
247: added sys_errlist, strerror and perror
248: added isblank
249: added atol
250:
251: 0.6.2:
252: mmap for ARM didn't compile. Thanks, Paul!
253:
254: 0.6.1:
255: split mmap into the architecture specific subdirectories.
256: getenv now copes with environ==NULL, thanks Paul Clifford.
257: Paul also contributed a smaller ARM startup code.
258:
259: 0.6:
260: strcat returned the wrong result. Thanks, Dietz Pröpper.
261: strtod now understands a negative exponent (oops, thanks Bertram Barth)
262: Port to arm-linux-gnu, but on the Netwinder I use for testing the
263: __dtostr does not work (I have no idea why!)
264: The MIPS port now uses (much smaller) non-PIC code. That means that
265: the applications you link against diet libc also have to be compiled
266: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
267: Thanks to Ralf Bächle for helping me with this!
268: I made subdirectories for the architectures and use VPATH to override
269: VPATH so that make finds the source file automatically. That should
270: simplify the sources greatly.
271: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
272: ARM and MIPS now also have setjmp and longjmp
273: "compile" and "load" are now make targets. Use them for djb programs.
274: added contrib/elftrunc.c which will remove unnecessary ELF headers.
275: Again, contributed from Olaf. Great work!
276:
277: 0.5.12:
278: printf also does signed numbers.
279: If you don't use atexit, dietlibc now does not link exit, only _exit.
280: *printf now correctly returns the number of bytes written.
281: Olaf contributed experimental sscanf and vsscanf implementations.
282: If passed NULL as buffer, snprintf will not write anything but still
283: return the number of bytes it would have written.
284: Initial MIPS port! (Oh, the agony!)
285: No setjmp and longjmp support yet! Please contribute!
286: I even implemented unified syscalls for MIPS. Still, MIPS code is
287: almost twice the size of SPARC code. If anyone knows why: please
288: tell me!
289:
290: 0.5.11:
291: I implemented new unified syscalls for x86, sparc and ppc, this time based
292: on .s files and not .c files, and I moved the syscalls into
293: subdirectores to clean the dietlibc sources up a little.
294: A binary consisting of printf("%s is %d\n","olaf",23) is now
295: 2864 bytes on sparc
296: 2488 bytes on intel
297: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
298: to make a few more applications work.
299: Olaf Dreesen also implemented some unified syscall stuff for x86.
300: He discovered that with our unified syscall interface it actually
301: costs <10 bytes total to make all system calls thread safe!
302: I implemented atexit() (can register up to 4 callbacks).
303: I implemented strtod and __dtostr (the opposite). Now we can add
304: floating point support to vsnprintf and sscanf!
305:
306: 0.5.10:
307: I actually saw that I can not only merge the errno handling code of
308: the system calls on x86, I can also merge the rest (including the
309: arguments) except for setting the system call number. All those
310: system calls are now just a jump to a unified system call handler.
311: I got rid of x86openclose again. The savings are substantial:
312: chown from embutils went from 7664 to 7184 bytes!
313: If I'd move the system call wrappers to assembly language, I could
314: even reduce the alignment (does not matter since it's just a jump
315: anyway) and get rid of the "ret" behind each jump (one byte per
316: system call!)
317:
318: 0.5.9:
319: added memchr, strpbrk, strstr, strtol, isspace (hehe)
320: fixed strdup
321: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
322: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
323: (no signed integers, only strings and unsigned integers (but
324: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
325: that code must be wonderful, I don't understand it at all *bg*)
326: Olaf's printf does understand padding like in "%08d" and "%8d" and
327: automatically pads pointers with '0'.
328: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
329: Thanks to proton for inspiration on this.
330: The new x86 start code also does not reference exit any more, thus saving
331: 64 bytes for executables that don't call exit explicitly.
332: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
333: Moved errno and environ to start.S, saving no byte binary size but
334: speeding up compilation and slightly shortening dietlibc.a ;-)
335: For x86: joined open and close into one assembler file, sharing the
336: errno handling. This is a feasibility test and it actually saves a
337: few bytes. I think I will reimplement the _syscall[1-6] macros on
338: all platforms now to share the errno handling code for them.
339:
340: 0.5.8:
341: fixed strchr to be able to look for 0.
342:
343: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
344: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
345: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
346: contributed by Olaf Dreesen)
347:
348: added execvp, getcwd
349:
350: fixed __xmknod
351:
352: Note: can it be that the ftw interface really is so broken that I
353: cannot implement it without having to implement some searching data
354: structure? I included an experimental ftw implementation that will
355: not follow symlinks.
356:
357: 0.5.7:
358: oops, if_nametoindex was broken!
359:
360: 0.5.6:
361: ported to ppc-linux.
362: fixed i386 sigsetjmp (I mistyped the function name)
363: included sigjmp.c
364:
365: 0.5.5:
366: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
367: actually, it wasn't fork that wasn't working for sparc, it was pipe.
368: I fixed it now.
369: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
370: fixed readdir to use getdents and not the intel inline asm
371:
372: 0.5.4:
373: ported to sparclinux (sparc32 only). Beware: does not work yet.
374: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
375:
376: 0.5.3:
377: added tcsetattr and getenv to compile e3
378:
379: 0.5.2:
380: added vhangup, tcgetattr, isatty and memcmp for fgetty
381: (http://www.fefe.de/fgetty/)
382: added localtime from uC-libc.
383:
384: 0.5.1:
385: stat and friends actually work now. Yuck! Another case of
386: translation between kernel and userland. Why can't the kernel
387: people and the libc people simply agree on a standard?
388: removed many unnecessary includes to speed up compilation.
389: added -fomit-frame-pointer and i386 compilation target to reduce code size.
390: inlined socketcall to reduce code size.
391: "load" and "compile" are examples for djb code.
392:
393: 0.5:
394: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
395: each object file is now treated with "strip -x -R .note -R .comment"
396: split each system call into a separate object file
397: added ntohs, htons, alarm, if_indextoname and if_nametoindex
398:
399: 0.4.1:
400: oops, the strchr implementation was wrong. Thanks Jens Laas!
401:
402: 0.4:
403: copied opendir and friends from uC-libc.
404: added getservent and getservby* in gerservent.c
405:
406: 0.3:
407: remove readdir system call
408: added getdents system call
409: added getpwnam/getpwuid implementation in getpwnam.c
410: added a few string functions (in str*.c)
411:
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