Annotation of dietlibc/CHANGES, revision 1.82
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
1.74 fefe 13:
1.73 fefe 14: 0.9:
1.65 fefe 15: fixed initgroups (oops)
1.66 fefe 16: Cleanup appending file open for stdio (thanks, James Antill)
17: imported vfprintf fix from James Antill.
1.67 fefe 18: add fnmatch
19: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 20: Olaf added character classes to *scanf.
1.69 fefe 21: Put object and library files into a separate directory (bin-$ARCH).
22: Add "cross" make target to make all architectures.
23: Add "diet" program and man page.
1.70 fefe 24: Add getgrnam, getgrgid
1.71 fefe 25: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 26: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 27:
1.64 fefe 28: 0.8:
1.34 fefe 29: vsnprintf(0,...) estimated the length of strings with a padding width
30: incorrectly.
1.35 fefe 31: new reboot() from Olaf.
1.36 fefe 32: added prototypes for getsockopt and setsockopt.
1.39 fefe 33: added experimental sem* and shm*
1.38 fefe 34: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 35: added setvbuf (only changes mode, not buffer)
1.41 fefe 36: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
37: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 38: added qsort() and bsearch(). Benchmark on 1000 random ints:
39: glibc: 679414 cycles qsort and 3352 cycles bsearch
40: diet libc: 300010 cycles qsort, 553 cycles bsearch
41: I have no idea why glibc is so slow.
1.43 fefe 42: added __isnan (references by libm.a from glibc).
43: added popen() and pclose(). Now the diet libc can link slsh (from
44: S-Lang!)
1.44 fefe 45: corrected usleep. It was more of an msleep until now.
1.45 fefe 46: corrected __dtostr (it looped when trying to format "0.0").
47: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 48: added ungetc (does it work?)
1.47 fefe 49: added inet_aton (yuck!)
1.50 fefe 50: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 51: added h_errno and __h_errno_location
52: added inet_ntoa
1.49 fefe 53: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 54: add bcopy, index, rindex macros
55: add isgraph and isxdigit
1.52 fefe 56: add strftime (ugh!!!)
1.53 olaf 57: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 58: Jeff Garzik contributed a spec file. I put it in contrib and hope
59: everbody knows what to do with it...
60: Olaf checked in a ton of libpthread stuff.
1.55 fefe 61: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 62: add large file backwards compatibility support (so gzip will run on
63: kernel 2.2 and 2.0)
1.57 fefe 64: added shutdown
1.58 fefe 65: added nice
66: added pseudo-locale support for is* (they are now weak aliases,
67: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
68: overwrite the default is* functions.
1.59 fefe 69: added liblatin1.a
1.60 fefe 70: added tzfile implementation (does it work for anyone else?)
1.61 fefe 71: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 72: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
73: Thanks!
1.63 fefe 74: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 75:
1.21 fefe 76: 0.7.2:
77: added several prototypes to already implemented functions and
78: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 79: added prototypes for process group and dup syscalls. Thanks to
80: Abraham again. He also contributed an implementation for daemon(),
81: an ugly BSD hack. I decided to diversify the lib/ directory a
82: little and now created a libugly/ directory for stuff like system()
83: and daemon() ;-)
84: added libstdio and moved all that stdio crap from lib/ there. The
85: idea is to start separating now what we will separate for shared
86: libraries anyway.
1.26 fefe 87: optimized x86 unified-syscall by Olaf.
1.27 fefe 88: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
89: limits.h instead)
90: added remove.c and enough cruft to limits.h to make it compile lzo,
91: lzop and bzip2.
1.28 fefe 92: added mktime, asctime_r, asctime and ctime (needed for gzip).
93: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 94: format some day (man tzfile, ugh!) :-(
1.29 fefe 95: added unlink prototype to unistd.h.
96: added gmtime and gmtime_r.
1.31 fefe 97: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 98: removed readdir glibc compatibility cruft.
1.31 fefe 99: removed stat glibc compatibility cruft.
1.32 fefe 100: oops, my fread was broken for pipes.
1.33 fefe 101: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 102:
1.9 fefe 103: 0.7.1:
1.11 fefe 104: optimized away the static arrays from __ltostr and __lltostr.
105: optimized away the static arrays (and more!) from strtoul and strtoull.
106: added system (by Olaf).
1.12 fefe 107: added tolower and toupper
1.13 fefe 108: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 109: added clone for mips (by Olaf).
110: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 111: added pause for all (by Olaf).
1.17 fefe 112: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 113: added isupper and islower.
114: added putc and putchar as macros.
1.17 fefe 115: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
116: insightful discussions and patches I partially used for the last three)
1.18 fefe 117: added getpriority and setpriority (also by Abraham)
1.19 fefe 118: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 119: oi, setjmp and longjmp were broken on other platforms, too!
120: Thanks to Sébastien Côté for reporting this.
1.9 fefe 121:
122: 0.7:
1.6 olaf 123: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 124: Initial dynamic loading glue for i386, also by Olaf.
125: We don't have a dynamic loader yet, so this is not yet usable.
126: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
127: vsprintf, writev, all by Olaf.
1.2 fefe 128: imported readdir fix from Guillaume. Mhh, can the kernel interface
129: really be this broken?
1.3 fefe 130: Found a kludgy way to detect whether the kernel includes define struct
131: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
132: not work for you, please tell me!
1.4 fefe 133: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 134: Fixed stdio line buffering. The code was already there but I forgot
135: to mark stdio and stdout as line buffered. This should really be
136: done dynamically using isatty, though.
1.8 fefe 137: Removed superfluous "if (1)" in execvp.c
1.1 cvs 138:
139: 0.6.14:
140: *scanf did not append the 0 byte for %s.
141: added creat and changed creat to call open directly instead of open64.
142: did for fread what 0.6.10 did for fwrite.
143: repaired buffered stdio a little (line buffering is still not
144: supported).
145: [All of these bugs have been reported by Guillaume. Thanks!]
146: added __pure__ to strchr and strrchr in <string.h>
147:
148: 0.6.13:
149: included COPYING to make clear that the diet libc is covered by the
150: GNU General Public License (and _not_ the LGPL). That means that
151: you need to obtain a license from me if you want to use the diet
152: libc in a proprietary program that you want to distribute.
153: The x86 unified syscall swapped arguments #4 and #5 and noone
154: noticed until now! Thanks to Guillaume Cottenceau for reporting
155: this!
156: The malloc had a subtle bug with small allocations that could cause
157: segfault. Guillaume reported it, Olaf fixed it.
158:
159: 0.6.12:
160: added assert, statfs and fstatfs
161: added include/net/if.h so fget compiles again.
162:
163: 0.6.11:
164: added putenv.
165:
166: 0.6.10:
167: fixed fwrite. It returned the number of bytes written, not the number
168: of records. Thanks to Albert D. Cahalan for pointing this out.
169: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
170: added brk and sbrk. harold@nb.com.sg made me do it.
171:
172: 0.6.9:
173: fixed execvp not to return on ENOENT
174: did for {open|read|close|seek|tell}dir what I did for stat before.
175: The glibc compatibility part is currently non-functional.
176: fixed white space handling in sscanf " (" would not match " (".
177: fixed printf to accept 'l' flag.
178: fixed getpwuid (ignored last line)
179:
180: 0.6.8:
181: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
182: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
183: added strlcpy and strlcat from OpenBSD.
184: added stat64, fstat64 and lstat64.
185: added endian.h and made ending of strlen.c endianness-aware
186: added string routines size tweak to dietfeatures.h. Most of the
187: string routines have been unrolled. This is up to three times as
188: fast but creates up to three times larger code. Now you can disable
189: the unrolling.
190: added sendfile.
191: I also added pread. It works on x86 and sparc but not on ppc and mips.
192: I have no idea what's going on. strace disagrees with the kernel.
193: Can anyone help? I asked the Linux kernel mailing list for help, too.
194: added a few aliases of the type __libc_open for open. nm on
195: libpthreads.so indicates that we will need them.
196:
197: 0.6.7:
198: the sources now compile without warnings with -Wall.
199: printf now prints "(null)" when %s is passed NULL. This can be
200: removed with WANT_NULL_PRINTF in dietfeatures.h
201: added vfprintf, execl, ttyname.
202: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
203: __dietfstat so they can use the normal kernel struct stat.
204: stat, lstat and fstat are now C wrappers that convert to the glibc
205: struct stat. So we can avoid that overhead for programs that use
206: dietlibc headers.
207:
208: 0.6.6:
209: changed the Makefiles so you can now set CFLAGS on the command line
210: added memccmp (analogous to memccpy) and strncmp.
211: Olaf fixed another bug in the sparc unified syscall.
212: Paul Clifford contributed a C version of his strlen.S that is much
213: more efficient than the previous strlen on all platforms! It also
214: looks like technology from Roswell. ;-}
215: added a "real" stdio. Well, almost. Please contribute!
216: added dietfeatures.h so you can remove features you don't need.
217: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
218: stdio now works with simple programs and minigzip from libz.
219: stdio uses some major trickery to avoid linking the stdio, stderr and
220: stdout (and reserving space for them) when they are not used.
221:
222: 0.6.5:
223: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
224: most of them bugs in the new header files, but also missing sigset
225: functions.
226: Paul Clifford contributed an assembly strlen.S for ARM and fixed
227: several bugs.
228: Fixed ppc/setjmp and mips/pipe.
229: Olaf contributed a new sparc unified syscall.
230:
231: 0.6.4:
232: declared is* static inline in getservent.
233: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
234: changed strlen to return 0 when passed NULL.
235: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
236: Scientist who actually implemented this without access to a MIPS
237: box, just from reading the architecture manual. And it worked out
238: of the box.
239: started a set of system includes, mainly so that I can use lcc and
240: my alpha-linux cross compiler (which is unable to cross-compile
241: glibc). diet libc can now be compiled without any include files
242: from a normal libc. The includes do declare more than diet libc
243: currently delivers and they are still far from complete for real
244: applications.
245: I will only add assembly versions that are smaller _and_ faster than
246: the C version. Larger routines are only accepted if they are called
247: very often and are substantially faster.
248: added i386 assembly strchr, which is smaller and faster than the old
249: version. It is, however, larger than the version contributed by
250: proton (thanks, anyway).
251: added i386 strlen (31% faster, 14% smaller)
252: "make t" will now create a map file called "mapfile".
253:
254: 0.6.3:
255: added sys_errlist, strerror and perror
256: added isblank
257: added atol
258:
259: 0.6.2:
260: mmap for ARM didn't compile. Thanks, Paul!
261:
262: 0.6.1:
263: split mmap into the architecture specific subdirectories.
264: getenv now copes with environ==NULL, thanks Paul Clifford.
265: Paul also contributed a smaller ARM startup code.
266:
267: 0.6:
268: strcat returned the wrong result. Thanks, Dietz Pröpper.
269: strtod now understands a negative exponent (oops, thanks Bertram Barth)
270: Port to arm-linux-gnu, but on the Netwinder I use for testing the
271: __dtostr does not work (I have no idea why!)
272: The MIPS port now uses (much smaller) non-PIC code. That means that
273: the applications you link against diet libc also have to be compiled
274: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
275: Thanks to Ralf Bächle for helping me with this!
276: I made subdirectories for the architectures and use VPATH to override
277: VPATH so that make finds the source file automatically. That should
278: simplify the sources greatly.
279: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
280: ARM and MIPS now also have setjmp and longjmp
281: "compile" and "load" are now make targets. Use them for djb programs.
282: added contrib/elftrunc.c which will remove unnecessary ELF headers.
283: Again, contributed from Olaf. Great work!
284:
285: 0.5.12:
286: printf also does signed numbers.
287: If you don't use atexit, dietlibc now does not link exit, only _exit.
288: *printf now correctly returns the number of bytes written.
289: Olaf contributed experimental sscanf and vsscanf implementations.
290: If passed NULL as buffer, snprintf will not write anything but still
291: return the number of bytes it would have written.
292: Initial MIPS port! (Oh, the agony!)
293: No setjmp and longjmp support yet! Please contribute!
294: I even implemented unified syscalls for MIPS. Still, MIPS code is
295: almost twice the size of SPARC code. If anyone knows why: please
296: tell me!
297:
298: 0.5.11:
299: I implemented new unified syscalls for x86, sparc and ppc, this time based
300: on .s files and not .c files, and I moved the syscalls into
301: subdirectores to clean the dietlibc sources up a little.
302: A binary consisting of printf("%s is %d\n","olaf",23) is now
303: 2864 bytes on sparc
304: 2488 bytes on intel
305: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
306: to make a few more applications work.
307: Olaf Dreesen also implemented some unified syscall stuff for x86.
308: He discovered that with our unified syscall interface it actually
309: costs <10 bytes total to make all system calls thread safe!
310: I implemented atexit() (can register up to 4 callbacks).
311: I implemented strtod and __dtostr (the opposite). Now we can add
312: floating point support to vsnprintf and sscanf!
313:
314: 0.5.10:
315: I actually saw that I can not only merge the errno handling code of
316: the system calls on x86, I can also merge the rest (including the
317: arguments) except for setting the system call number. All those
318: system calls are now just a jump to a unified system call handler.
319: I got rid of x86openclose again. The savings are substantial:
320: chown from embutils went from 7664 to 7184 bytes!
321: If I'd move the system call wrappers to assembly language, I could
322: even reduce the alignment (does not matter since it's just a jump
323: anyway) and get rid of the "ret" behind each jump (one byte per
324: system call!)
325:
326: 0.5.9:
327: added memchr, strpbrk, strstr, strtol, isspace (hehe)
328: fixed strdup
329: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
330: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
331: (no signed integers, only strings and unsigned integers (but
332: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
333: that code must be wonderful, I don't understand it at all *bg*)
334: Olaf's printf does understand padding like in "%08d" and "%8d" and
335: automatically pads pointers with '0'.
336: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
337: Thanks to proton for inspiration on this.
338: The new x86 start code also does not reference exit any more, thus saving
339: 64 bytes for executables that don't call exit explicitly.
340: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
341: Moved errno and environ to start.S, saving no byte binary size but
342: speeding up compilation and slightly shortening dietlibc.a ;-)
343: For x86: joined open and close into one assembler file, sharing the
344: errno handling. This is a feasibility test and it actually saves a
345: few bytes. I think I will reimplement the _syscall[1-6] macros on
346: all platforms now to share the errno handling code for them.
347:
348: 0.5.8:
349: fixed strchr to be able to look for 0.
350:
351: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
352: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
353: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
354: contributed by Olaf Dreesen)
355:
356: added execvp, getcwd
357:
358: fixed __xmknod
359:
360: Note: can it be that the ftw interface really is so broken that I
361: cannot implement it without having to implement some searching data
362: structure? I included an experimental ftw implementation that will
363: not follow symlinks.
364:
365: 0.5.7:
366: oops, if_nametoindex was broken!
367:
368: 0.5.6:
369: ported to ppc-linux.
370: fixed i386 sigsetjmp (I mistyped the function name)
371: included sigjmp.c
372:
373: 0.5.5:
374: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
375: actually, it wasn't fork that wasn't working for sparc, it was pipe.
376: I fixed it now.
377: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
378: fixed readdir to use getdents and not the intel inline asm
379:
380: 0.5.4:
381: ported to sparclinux (sparc32 only). Beware: does not work yet.
382: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
383:
384: 0.5.3:
385: added tcsetattr and getenv to compile e3
386:
387: 0.5.2:
388: added vhangup, tcgetattr, isatty and memcmp for fgetty
389: (http://www.fefe.de/fgetty/)
390: added localtime from uC-libc.
391:
392: 0.5.1:
393: stat and friends actually work now. Yuck! Another case of
394: translation between kernel and userland. Why can't the kernel
395: people and the libc people simply agree on a standard?
396: removed many unnecessary includes to speed up compilation.
397: added -fomit-frame-pointer and i386 compilation target to reduce code size.
398: inlined socketcall to reduce code size.
399: "load" and "compile" are examples for djb code.
400:
401: 0.5:
402: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
403: each object file is now treated with "strip -x -R .note -R .comment"
404: split each system call into a separate object file
405: added ntohs, htons, alarm, if_indextoname and if_nametoindex
406:
407: 0.4.1:
408: oops, the strchr implementation was wrong. Thanks Jens Laas!
409:
410: 0.4:
411: copied opendir and friends from uC-libc.
412: added getservent and getservby* in gerservent.c
413:
414: 0.3:
415: remove readdir system call
416: added getdents system call
417: added getpwnam/getpwuid implementation in getpwnam.c
418: added a few string functions (in str*.c)
419:
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