Annotation of dietlibc/CHANGES, revision 1.83
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 :-(
1.74 fefe 17:
1.73 fefe 18: 0.9:
1.65 fefe 19: fixed initgroups (oops)
1.66 fefe 20: Cleanup appending file open for stdio (thanks, James Antill)
21: imported vfprintf fix from James Antill.
1.67 fefe 22: add fnmatch
23: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 24: Olaf added character classes to *scanf.
1.69 fefe 25: Put object and library files into a separate directory (bin-$ARCH).
26: Add "cross" make target to make all architectures.
27: Add "diet" program and man page.
1.70 fefe 28: Add getgrnam, getgrgid
1.71 fefe 29: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 30: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 31:
1.64 fefe 32: 0.8:
1.34 fefe 33: vsnprintf(0,...) estimated the length of strings with a padding width
34: incorrectly.
1.35 fefe 35: new reboot() from Olaf.
1.36 fefe 36: added prototypes for getsockopt and setsockopt.
1.39 fefe 37: added experimental sem* and shm*
1.38 fefe 38: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 39: added setvbuf (only changes mode, not buffer)
1.41 fefe 40: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
41: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 42: added qsort() and bsearch(). Benchmark on 1000 random ints:
43: glibc: 679414 cycles qsort and 3352 cycles bsearch
44: diet libc: 300010 cycles qsort, 553 cycles bsearch
45: I have no idea why glibc is so slow.
1.43 fefe 46: added __isnan (references by libm.a from glibc).
47: added popen() and pclose(). Now the diet libc can link slsh (from
48: S-Lang!)
1.44 fefe 49: corrected usleep. It was more of an msleep until now.
1.45 fefe 50: corrected __dtostr (it looped when trying to format "0.0").
51: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 52: added ungetc (does it work?)
1.47 fefe 53: added inet_aton (yuck!)
1.50 fefe 54: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 55: added h_errno and __h_errno_location
56: added inet_ntoa
1.49 fefe 57: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 58: add bcopy, index, rindex macros
59: add isgraph and isxdigit
1.52 fefe 60: add strftime (ugh!!!)
1.53 olaf 61: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 62: Jeff Garzik contributed a spec file. I put it in contrib and hope
63: everbody knows what to do with it...
64: Olaf checked in a ton of libpthread stuff.
1.55 fefe 65: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 66: add large file backwards compatibility support (so gzip will run on
67: kernel 2.2 and 2.0)
1.57 fefe 68: added shutdown
1.58 fefe 69: added nice
70: added pseudo-locale support for is* (they are now weak aliases,
71: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
72: overwrite the default is* functions.
1.59 fefe 73: added liblatin1.a
1.60 fefe 74: added tzfile implementation (does it work for anyone else?)
1.61 fefe 75: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 76: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
77: Thanks!
1.63 fefe 78: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 79:
1.21 fefe 80: 0.7.2:
81: added several prototypes to already implemented functions and
82: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 83: added prototypes for process group and dup syscalls. Thanks to
84: Abraham again. He also contributed an implementation for daemon(),
85: an ugly BSD hack. I decided to diversify the lib/ directory a
86: little and now created a libugly/ directory for stuff like system()
87: and daemon() ;-)
88: added libstdio and moved all that stdio crap from lib/ there. The
89: idea is to start separating now what we will separate for shared
90: libraries anyway.
1.26 fefe 91: optimized x86 unified-syscall by Olaf.
1.27 fefe 92: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
93: limits.h instead)
94: added remove.c and enough cruft to limits.h to make it compile lzo,
95: lzop and bzip2.
1.28 fefe 96: added mktime, asctime_r, asctime and ctime (needed for gzip).
97: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 98: format some day (man tzfile, ugh!) :-(
1.29 fefe 99: added unlink prototype to unistd.h.
100: added gmtime and gmtime_r.
1.31 fefe 101: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 102: removed readdir glibc compatibility cruft.
1.31 fefe 103: removed stat glibc compatibility cruft.
1.32 fefe 104: oops, my fread was broken for pipes.
1.33 fefe 105: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 106:
1.9 fefe 107: 0.7.1:
1.11 fefe 108: optimized away the static arrays from __ltostr and __lltostr.
109: optimized away the static arrays (and more!) from strtoul and strtoull.
110: added system (by Olaf).
1.12 fefe 111: added tolower and toupper
1.13 fefe 112: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 113: added clone for mips (by Olaf).
114: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 115: added pause for all (by Olaf).
1.17 fefe 116: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 117: added isupper and islower.
118: added putc and putchar as macros.
1.17 fefe 119: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
120: insightful discussions and patches I partially used for the last three)
1.18 fefe 121: added getpriority and setpriority (also by Abraham)
1.19 fefe 122: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 123: oi, setjmp and longjmp were broken on other platforms, too!
124: Thanks to Sébastien Côté for reporting this.
1.9 fefe 125:
126: 0.7:
1.6 olaf 127: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 128: Initial dynamic loading glue for i386, also by Olaf.
129: We don't have a dynamic loader yet, so this is not yet usable.
130: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
131: vsprintf, writev, all by Olaf.
1.2 fefe 132: imported readdir fix from Guillaume. Mhh, can the kernel interface
133: really be this broken?
1.3 fefe 134: Found a kludgy way to detect whether the kernel includes define struct
135: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
136: not work for you, please tell me!
1.4 fefe 137: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 138: Fixed stdio line buffering. The code was already there but I forgot
139: to mark stdio and stdout as line buffered. This should really be
140: done dynamically using isatty, though.
1.8 fefe 141: Removed superfluous "if (1)" in execvp.c
1.1 cvs 142:
143: 0.6.14:
144: *scanf did not append the 0 byte for %s.
145: added creat and changed creat to call open directly instead of open64.
146: did for fread what 0.6.10 did for fwrite.
147: repaired buffered stdio a little (line buffering is still not
148: supported).
149: [All of these bugs have been reported by Guillaume. Thanks!]
150: added __pure__ to strchr and strrchr in <string.h>
151:
152: 0.6.13:
153: included COPYING to make clear that the diet libc is covered by the
154: GNU General Public License (and _not_ the LGPL). That means that
155: you need to obtain a license from me if you want to use the diet
156: libc in a proprietary program that you want to distribute.
157: The x86 unified syscall swapped arguments #4 and #5 and noone
158: noticed until now! Thanks to Guillaume Cottenceau for reporting
159: this!
160: The malloc had a subtle bug with small allocations that could cause
161: segfault. Guillaume reported it, Olaf fixed it.
162:
163: 0.6.12:
164: added assert, statfs and fstatfs
165: added include/net/if.h so fget compiles again.
166:
167: 0.6.11:
168: added putenv.
169:
170: 0.6.10:
171: fixed fwrite. It returned the number of bytes written, not the number
172: of records. Thanks to Albert D. Cahalan for pointing this out.
173: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
174: added brk and sbrk. harold@nb.com.sg made me do it.
175:
176: 0.6.9:
177: fixed execvp not to return on ENOENT
178: did for {open|read|close|seek|tell}dir what I did for stat before.
179: The glibc compatibility part is currently non-functional.
180: fixed white space handling in sscanf " (" would not match " (".
181: fixed printf to accept 'l' flag.
182: fixed getpwuid (ignored last line)
183:
184: 0.6.8:
185: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
186: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
187: added strlcpy and strlcat from OpenBSD.
188: added stat64, fstat64 and lstat64.
189: added endian.h and made ending of strlen.c endianness-aware
190: added string routines size tweak to dietfeatures.h. Most of the
191: string routines have been unrolled. This is up to three times as
192: fast but creates up to three times larger code. Now you can disable
193: the unrolling.
194: added sendfile.
195: I also added pread. It works on x86 and sparc but not on ppc and mips.
196: I have no idea what's going on. strace disagrees with the kernel.
197: Can anyone help? I asked the Linux kernel mailing list for help, too.
198: added a few aliases of the type __libc_open for open. nm on
199: libpthreads.so indicates that we will need them.
200:
201: 0.6.7:
202: the sources now compile without warnings with -Wall.
203: printf now prints "(null)" when %s is passed NULL. This can be
204: removed with WANT_NULL_PRINTF in dietfeatures.h
205: added vfprintf, execl, ttyname.
206: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
207: __dietfstat so they can use the normal kernel struct stat.
208: stat, lstat and fstat are now C wrappers that convert to the glibc
209: struct stat. So we can avoid that overhead for programs that use
210: dietlibc headers.
211:
212: 0.6.6:
213: changed the Makefiles so you can now set CFLAGS on the command line
214: added memccmp (analogous to memccpy) and strncmp.
215: Olaf fixed another bug in the sparc unified syscall.
216: Paul Clifford contributed a C version of his strlen.S that is much
217: more efficient than the previous strlen on all platforms! It also
218: looks like technology from Roswell. ;-}
219: added a "real" stdio. Well, almost. Please contribute!
220: added dietfeatures.h so you can remove features you don't need.
221: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
222: stdio now works with simple programs and minigzip from libz.
223: stdio uses some major trickery to avoid linking the stdio, stderr and
224: stdout (and reserving space for them) when they are not used.
225:
226: 0.6.5:
227: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
228: most of them bugs in the new header files, but also missing sigset
229: functions.
230: Paul Clifford contributed an assembly strlen.S for ARM and fixed
231: several bugs.
232: Fixed ppc/setjmp and mips/pipe.
233: Olaf contributed a new sparc unified syscall.
234:
235: 0.6.4:
236: declared is* static inline in getservent.
237: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
238: changed strlen to return 0 when passed NULL.
239: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
240: Scientist who actually implemented this without access to a MIPS
241: box, just from reading the architecture manual. And it worked out
242: of the box.
243: started a set of system includes, mainly so that I can use lcc and
244: my alpha-linux cross compiler (which is unable to cross-compile
245: glibc). diet libc can now be compiled without any include files
246: from a normal libc. The includes do declare more than diet libc
247: currently delivers and they are still far from complete for real
248: applications.
249: I will only add assembly versions that are smaller _and_ faster than
250: the C version. Larger routines are only accepted if they are called
251: very often and are substantially faster.
252: added i386 assembly strchr, which is smaller and faster than the old
253: version. It is, however, larger than the version contributed by
254: proton (thanks, anyway).
255: added i386 strlen (31% faster, 14% smaller)
256: "make t" will now create a map file called "mapfile".
257:
258: 0.6.3:
259: added sys_errlist, strerror and perror
260: added isblank
261: added atol
262:
263: 0.6.2:
264: mmap for ARM didn't compile. Thanks, Paul!
265:
266: 0.6.1:
267: split mmap into the architecture specific subdirectories.
268: getenv now copes with environ==NULL, thanks Paul Clifford.
269: Paul also contributed a smaller ARM startup code.
270:
271: 0.6:
272: strcat returned the wrong result. Thanks, Dietz Pröpper.
273: strtod now understands a negative exponent (oops, thanks Bertram Barth)
274: Port to arm-linux-gnu, but on the Netwinder I use for testing the
275: __dtostr does not work (I have no idea why!)
276: The MIPS port now uses (much smaller) non-PIC code. That means that
277: the applications you link against diet libc also have to be compiled
278: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
279: Thanks to Ralf Bächle for helping me with this!
280: I made subdirectories for the architectures and use VPATH to override
281: VPATH so that make finds the source file automatically. That should
282: simplify the sources greatly.
283: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
284: ARM and MIPS now also have setjmp and longjmp
285: "compile" and "load" are now make targets. Use them for djb programs.
286: added contrib/elftrunc.c which will remove unnecessary ELF headers.
287: Again, contributed from Olaf. Great work!
288:
289: 0.5.12:
290: printf also does signed numbers.
291: If you don't use atexit, dietlibc now does not link exit, only _exit.
292: *printf now correctly returns the number of bytes written.
293: Olaf contributed experimental sscanf and vsscanf implementations.
294: If passed NULL as buffer, snprintf will not write anything but still
295: return the number of bytes it would have written.
296: Initial MIPS port! (Oh, the agony!)
297: No setjmp and longjmp support yet! Please contribute!
298: I even implemented unified syscalls for MIPS. Still, MIPS code is
299: almost twice the size of SPARC code. If anyone knows why: please
300: tell me!
301:
302: 0.5.11:
303: I implemented new unified syscalls for x86, sparc and ppc, this time based
304: on .s files and not .c files, and I moved the syscalls into
305: subdirectores to clean the dietlibc sources up a little.
306: A binary consisting of printf("%s is %d\n","olaf",23) is now
307: 2864 bytes on sparc
308: 2488 bytes on intel
309: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
310: to make a few more applications work.
311: Olaf Dreesen also implemented some unified syscall stuff for x86.
312: He discovered that with our unified syscall interface it actually
313: costs <10 bytes total to make all system calls thread safe!
314: I implemented atexit() (can register up to 4 callbacks).
315: I implemented strtod and __dtostr (the opposite). Now we can add
316: floating point support to vsnprintf and sscanf!
317:
318: 0.5.10:
319: I actually saw that I can not only merge the errno handling code of
320: the system calls on x86, I can also merge the rest (including the
321: arguments) except for setting the system call number. All those
322: system calls are now just a jump to a unified system call handler.
323: I got rid of x86openclose again. The savings are substantial:
324: chown from embutils went from 7664 to 7184 bytes!
325: If I'd move the system call wrappers to assembly language, I could
326: even reduce the alignment (does not matter since it's just a jump
327: anyway) and get rid of the "ret" behind each jump (one byte per
328: system call!)
329:
330: 0.5.9:
331: added memchr, strpbrk, strstr, strtol, isspace (hehe)
332: fixed strdup
333: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
334: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
335: (no signed integers, only strings and unsigned integers (but
336: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
337: that code must be wonderful, I don't understand it at all *bg*)
338: Olaf's printf does understand padding like in "%08d" and "%8d" and
339: automatically pads pointers with '0'.
340: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
341: Thanks to proton for inspiration on this.
342: The new x86 start code also does not reference exit any more, thus saving
343: 64 bytes for executables that don't call exit explicitly.
344: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
345: Moved errno and environ to start.S, saving no byte binary size but
346: speeding up compilation and slightly shortening dietlibc.a ;-)
347: For x86: joined open and close into one assembler file, sharing the
348: errno handling. This is a feasibility test and it actually saves a
349: few bytes. I think I will reimplement the _syscall[1-6] macros on
350: all platforms now to share the errno handling code for them.
351:
352: 0.5.8:
353: fixed strchr to be able to look for 0.
354:
355: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
356: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
357: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
358: contributed by Olaf Dreesen)
359:
360: added execvp, getcwd
361:
362: fixed __xmknod
363:
364: Note: can it be that the ftw interface really is so broken that I
365: cannot implement it without having to implement some searching data
366: structure? I included an experimental ftw implementation that will
367: not follow symlinks.
368:
369: 0.5.7:
370: oops, if_nametoindex was broken!
371:
372: 0.5.6:
373: ported to ppc-linux.
374: fixed i386 sigsetjmp (I mistyped the function name)
375: included sigjmp.c
376:
377: 0.5.5:
378: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
379: actually, it wasn't fork that wasn't working for sparc, it was pipe.
380: I fixed it now.
381: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
382: fixed readdir to use getdents and not the intel inline asm
383:
384: 0.5.4:
385: ported to sparclinux (sparc32 only). Beware: does not work yet.
386: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
387:
388: 0.5.3:
389: added tcsetattr and getenv to compile e3
390:
391: 0.5.2:
392: added vhangup, tcgetattr, isatty and memcmp for fgetty
393: (http://www.fefe.de/fgetty/)
394: added localtime from uC-libc.
395:
396: 0.5.1:
397: stat and friends actually work now. Yuck! Another case of
398: translation between kernel and userland. Why can't the kernel
399: people and the libc people simply agree on a standard?
400: removed many unnecessary includes to speed up compilation.
401: added -fomit-frame-pointer and i386 compilation target to reduce code size.
402: inlined socketcall to reduce code size.
403: "load" and "compile" are examples for djb code.
404:
405: 0.5:
406: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
407: each object file is now treated with "strip -x -R .note -R .comment"
408: split each system call into a separate object file
409: added ntohs, htons, alarm, if_indextoname and if_nametoindex
410:
411: 0.4.1:
412: oops, the strchr implementation was wrong. Thanks Jens Laas!
413:
414: 0.4:
415: copied opendir and friends from uC-libc.
416: added getservent and getservby* in gerservent.c
417:
418: 0.3:
419: remove readdir system call
420: added getdents system call
421: added getpwnam/getpwuid implementation in getpwnam.c
422: added a few string functions (in str*.c)
423:
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