Annotation of dietlibc/CHANGES, revision 1.98
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!!!).
1.87 fefe 21: add llseek and lseek64 with optional lseek fall-back.
1.88 fefe 22: add res_init.
23: add asprintf (ugh, what an ugly function).
1.89 fefe 24: expanded arpa/nameser.h to include backwards compatibility defines
1.90 fefe 25: add ut_name alias to ut_host in struct utmp.
26: add inet_ntop, inet_pton, gethostbyname2.
1.92 fefe 27: add sysinfo, recvmsg, sendmsg.
1.93 fefe 28: add endmntent, getmntent, setmntent.
1.94 fefe 29: fix fnmatch (thanks, Guillaume Cottenceau!)
1.96 fefe 30: add setenv.
31: remove __restrict from mntent.h, add __restrict__ removal alias for
32: older gcc versions in sys/cdefs.h.
33: add rlim_t, sig_atomic_t declarations.
34: add sigsetjmp #define for __sigsetjmp (oops).
35: (Thanks to Chris Siebenmann for these three bug reports)
1.97 fefe 36: add a gruesome hack to printf floating point to accept %f and kludge
37: together support for %.2f. Don't look at the code, please!
1.98 ! fefe 38: fixed tcsetpgrp (oops, this is embarassing! Thanks, Chris Siebenmann)
1.74 fefe 39:
1.73 fefe 40: 0.9:
1.65 fefe 41: fixed initgroups (oops)
1.66 fefe 42: Cleanup appending file open for stdio (thanks, James Antill)
43: imported vfprintf fix from James Antill.
1.67 fefe 44: add fnmatch
45: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 46: Olaf added character classes to *scanf.
1.69 fefe 47: Put object and library files into a separate directory (bin-$ARCH).
48: Add "cross" make target to make all architectures.
49: Add "diet" program and man page.
1.70 fefe 50: Add getgrnam, getgrgid
1.71 fefe 51: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 52: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 53:
1.64 fefe 54: 0.8:
1.34 fefe 55: vsnprintf(0,...) estimated the length of strings with a padding width
56: incorrectly.
1.35 fefe 57: new reboot() from Olaf.
1.36 fefe 58: added prototypes for getsockopt and setsockopt.
1.39 fefe 59: added experimental sem* and shm*
1.38 fefe 60: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 61: added setvbuf (only changes mode, not buffer)
1.41 fefe 62: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
63: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 64: added qsort() and bsearch(). Benchmark on 1000 random ints:
65: glibc: 679414 cycles qsort and 3352 cycles bsearch
66: diet libc: 300010 cycles qsort, 553 cycles bsearch
67: I have no idea why glibc is so slow.
1.43 fefe 68: added __isnan (references by libm.a from glibc).
69: added popen() and pclose(). Now the diet libc can link slsh (from
70: S-Lang!)
1.44 fefe 71: corrected usleep. It was more of an msleep until now.
1.45 fefe 72: corrected __dtostr (it looped when trying to format "0.0").
73: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 74: added ungetc (does it work?)
1.47 fefe 75: added inet_aton (yuck!)
1.50 fefe 76: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 77: added h_errno and __h_errno_location
78: added inet_ntoa
1.49 fefe 79: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 80: add bcopy, index, rindex macros
81: add isgraph and isxdigit
1.52 fefe 82: add strftime (ugh!!!)
1.53 olaf 83: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 84: Jeff Garzik contributed a spec file. I put it in contrib and hope
85: everbody knows what to do with it...
86: Olaf checked in a ton of libpthread stuff.
1.55 fefe 87: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 88: add large file backwards compatibility support (so gzip will run on
89: kernel 2.2 and 2.0)
1.57 fefe 90: added shutdown
1.58 fefe 91: added nice
92: added pseudo-locale support for is* (they are now weak aliases,
93: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
94: overwrite the default is* functions.
1.59 fefe 95: added liblatin1.a
1.60 fefe 96: added tzfile implementation (does it work for anyone else?)
1.61 fefe 97: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 98: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
99: Thanks!
1.63 fefe 100: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 101:
1.21 fefe 102: 0.7.2:
103: added several prototypes to already implemented functions and
104: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 105: added prototypes for process group and dup syscalls. Thanks to
106: Abraham again. He also contributed an implementation for daemon(),
107: an ugly BSD hack. I decided to diversify the lib/ directory a
108: little and now created a libugly/ directory for stuff like system()
109: and daemon() ;-)
110: added libstdio and moved all that stdio crap from lib/ there. The
111: idea is to start separating now what we will separate for shared
112: libraries anyway.
1.26 fefe 113: optimized x86 unified-syscall by Olaf.
1.27 fefe 114: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
115: limits.h instead)
116: added remove.c and enough cruft to limits.h to make it compile lzo,
117: lzop and bzip2.
1.28 fefe 118: added mktime, asctime_r, asctime and ctime (needed for gzip).
119: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 120: format some day (man tzfile, ugh!) :-(
1.29 fefe 121: added unlink prototype to unistd.h.
122: added gmtime and gmtime_r.
1.31 fefe 123: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 124: removed readdir glibc compatibility cruft.
1.31 fefe 125: removed stat glibc compatibility cruft.
1.32 fefe 126: oops, my fread was broken for pipes.
1.33 fefe 127: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 128:
1.9 fefe 129: 0.7.1:
1.11 fefe 130: optimized away the static arrays from __ltostr and __lltostr.
131: optimized away the static arrays (and more!) from strtoul and strtoull.
132: added system (by Olaf).
1.12 fefe 133: added tolower and toupper
1.13 fefe 134: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 135: added clone for mips (by Olaf).
136: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 137: added pause for all (by Olaf).
1.17 fefe 138: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 139: added isupper and islower.
140: added putc and putchar as macros.
1.17 fefe 141: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
142: insightful discussions and patches I partially used for the last three)
1.18 fefe 143: added getpriority and setpriority (also by Abraham)
1.19 fefe 144: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 145: oi, setjmp and longjmp were broken on other platforms, too!
146: Thanks to Sébastien Côté for reporting this.
1.9 fefe 147:
148: 0.7:
1.6 olaf 149: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 150: Initial dynamic loading glue for i386, also by Olaf.
151: We don't have a dynamic loader yet, so this is not yet usable.
152: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
153: vsprintf, writev, all by Olaf.
1.2 fefe 154: imported readdir fix from Guillaume. Mhh, can the kernel interface
155: really be this broken?
1.3 fefe 156: Found a kludgy way to detect whether the kernel includes define struct
157: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
158: not work for you, please tell me!
1.4 fefe 159: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 160: Fixed stdio line buffering. The code was already there but I forgot
161: to mark stdio and stdout as line buffered. This should really be
162: done dynamically using isatty, though.
1.8 fefe 163: Removed superfluous "if (1)" in execvp.c
1.1 cvs 164:
165: 0.6.14:
166: *scanf did not append the 0 byte for %s.
167: added creat and changed creat to call open directly instead of open64.
168: did for fread what 0.6.10 did for fwrite.
169: repaired buffered stdio a little (line buffering is still not
170: supported).
171: [All of these bugs have been reported by Guillaume. Thanks!]
172: added __pure__ to strchr and strrchr in <string.h>
173:
174: 0.6.13:
175: included COPYING to make clear that the diet libc is covered by the
176: GNU General Public License (and _not_ the LGPL). That means that
177: you need to obtain a license from me if you want to use the diet
178: libc in a proprietary program that you want to distribute.
179: The x86 unified syscall swapped arguments #4 and #5 and noone
180: noticed until now! Thanks to Guillaume Cottenceau for reporting
181: this!
182: The malloc had a subtle bug with small allocations that could cause
183: segfault. Guillaume reported it, Olaf fixed it.
184:
185: 0.6.12:
186: added assert, statfs and fstatfs
187: added include/net/if.h so fget compiles again.
188:
189: 0.6.11:
190: added putenv.
191:
192: 0.6.10:
193: fixed fwrite. It returned the number of bytes written, not the number
194: of records. Thanks to Albert D. Cahalan for pointing this out.
195: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
196: added brk and sbrk. harold@nb.com.sg made me do it.
197:
198: 0.6.9:
199: fixed execvp not to return on ENOENT
200: did for {open|read|close|seek|tell}dir what I did for stat before.
201: The glibc compatibility part is currently non-functional.
202: fixed white space handling in sscanf " (" would not match " (".
203: fixed printf to accept 'l' flag.
204: fixed getpwuid (ignored last line)
205:
206: 0.6.8:
207: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
208: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
209: added strlcpy and strlcat from OpenBSD.
210: added stat64, fstat64 and lstat64.
211: added endian.h and made ending of strlen.c endianness-aware
212: added string routines size tweak to dietfeatures.h. Most of the
213: string routines have been unrolled. This is up to three times as
214: fast but creates up to three times larger code. Now you can disable
215: the unrolling.
216: added sendfile.
217: I also added pread. It works on x86 and sparc but not on ppc and mips.
218: I have no idea what's going on. strace disagrees with the kernel.
219: Can anyone help? I asked the Linux kernel mailing list for help, too.
220: added a few aliases of the type __libc_open for open. nm on
221: libpthreads.so indicates that we will need them.
222:
223: 0.6.7:
224: the sources now compile without warnings with -Wall.
225: printf now prints "(null)" when %s is passed NULL. This can be
226: removed with WANT_NULL_PRINTF in dietfeatures.h
227: added vfprintf, execl, ttyname.
228: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
229: __dietfstat so they can use the normal kernel struct stat.
230: stat, lstat and fstat are now C wrappers that convert to the glibc
231: struct stat. So we can avoid that overhead for programs that use
232: dietlibc headers.
233:
234: 0.6.6:
235: changed the Makefiles so you can now set CFLAGS on the command line
236: added memccmp (analogous to memccpy) and strncmp.
237: Olaf fixed another bug in the sparc unified syscall.
238: Paul Clifford contributed a C version of his strlen.S that is much
239: more efficient than the previous strlen on all platforms! It also
240: looks like technology from Roswell. ;-}
241: added a "real" stdio. Well, almost. Please contribute!
242: added dietfeatures.h so you can remove features you don't need.
243: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
244: stdio now works with simple programs and minigzip from libz.
245: stdio uses some major trickery to avoid linking the stdio, stderr and
246: stdout (and reserving space for them) when they are not used.
247:
248: 0.6.5:
249: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
250: most of them bugs in the new header files, but also missing sigset
251: functions.
252: Paul Clifford contributed an assembly strlen.S for ARM and fixed
253: several bugs.
254: Fixed ppc/setjmp and mips/pipe.
255: Olaf contributed a new sparc unified syscall.
256:
257: 0.6.4:
258: declared is* static inline in getservent.
259: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
260: changed strlen to return 0 when passed NULL.
261: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
262: Scientist who actually implemented this without access to a MIPS
263: box, just from reading the architecture manual. And it worked out
264: of the box.
265: started a set of system includes, mainly so that I can use lcc and
266: my alpha-linux cross compiler (which is unable to cross-compile
267: glibc). diet libc can now be compiled without any include files
268: from a normal libc. The includes do declare more than diet libc
269: currently delivers and they are still far from complete for real
270: applications.
271: I will only add assembly versions that are smaller _and_ faster than
272: the C version. Larger routines are only accepted if they are called
273: very often and are substantially faster.
274: added i386 assembly strchr, which is smaller and faster than the old
275: version. It is, however, larger than the version contributed by
276: proton (thanks, anyway).
277: added i386 strlen (31% faster, 14% smaller)
278: "make t" will now create a map file called "mapfile".
279:
280: 0.6.3:
281: added sys_errlist, strerror and perror
282: added isblank
283: added atol
284:
285: 0.6.2:
286: mmap for ARM didn't compile. Thanks, Paul!
287:
288: 0.6.1:
289: split mmap into the architecture specific subdirectories.
290: getenv now copes with environ==NULL, thanks Paul Clifford.
291: Paul also contributed a smaller ARM startup code.
292:
293: 0.6:
294: strcat returned the wrong result. Thanks, Dietz Pröpper.
295: strtod now understands a negative exponent (oops, thanks Bertram Barth)
296: Port to arm-linux-gnu, but on the Netwinder I use for testing the
297: __dtostr does not work (I have no idea why!)
298: The MIPS port now uses (much smaller) non-PIC code. That means that
299: the applications you link against diet libc also have to be compiled
300: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
301: Thanks to Ralf Bächle for helping me with this!
302: I made subdirectories for the architectures and use VPATH to override
303: VPATH so that make finds the source file automatically. That should
304: simplify the sources greatly.
305: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
306: ARM and MIPS now also have setjmp and longjmp
307: "compile" and "load" are now make targets. Use them for djb programs.
308: added contrib/elftrunc.c which will remove unnecessary ELF headers.
309: Again, contributed from Olaf. Great work!
310:
311: 0.5.12:
312: printf also does signed numbers.
313: If you don't use atexit, dietlibc now does not link exit, only _exit.
314: *printf now correctly returns the number of bytes written.
315: Olaf contributed experimental sscanf and vsscanf implementations.
316: If passed NULL as buffer, snprintf will not write anything but still
317: return the number of bytes it would have written.
318: Initial MIPS port! (Oh, the agony!)
319: No setjmp and longjmp support yet! Please contribute!
320: I even implemented unified syscalls for MIPS. Still, MIPS code is
321: almost twice the size of SPARC code. If anyone knows why: please
322: tell me!
323:
324: 0.5.11:
325: I implemented new unified syscalls for x86, sparc and ppc, this time based
326: on .s files and not .c files, and I moved the syscalls into
327: subdirectores to clean the dietlibc sources up a little.
328: A binary consisting of printf("%s is %d\n","olaf",23) is now
329: 2864 bytes on sparc
330: 2488 bytes on intel
331: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
332: to make a few more applications work.
333: Olaf Dreesen also implemented some unified syscall stuff for x86.
334: He discovered that with our unified syscall interface it actually
335: costs <10 bytes total to make all system calls thread safe!
336: I implemented atexit() (can register up to 4 callbacks).
337: I implemented strtod and __dtostr (the opposite). Now we can add
338: floating point support to vsnprintf and sscanf!
339:
340: 0.5.10:
341: I actually saw that I can not only merge the errno handling code of
342: the system calls on x86, I can also merge the rest (including the
343: arguments) except for setting the system call number. All those
344: system calls are now just a jump to a unified system call handler.
345: I got rid of x86openclose again. The savings are substantial:
346: chown from embutils went from 7664 to 7184 bytes!
347: If I'd move the system call wrappers to assembly language, I could
348: even reduce the alignment (does not matter since it's just a jump
349: anyway) and get rid of the "ret" behind each jump (one byte per
350: system call!)
351:
352: 0.5.9:
353: added memchr, strpbrk, strstr, strtol, isspace (hehe)
354: fixed strdup
355: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
356: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
357: (no signed integers, only strings and unsigned integers (but
358: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
359: that code must be wonderful, I don't understand it at all *bg*)
360: Olaf's printf does understand padding like in "%08d" and "%8d" and
361: automatically pads pointers with '0'.
362: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
363: Thanks to proton for inspiration on this.
364: The new x86 start code also does not reference exit any more, thus saving
365: 64 bytes for executables that don't call exit explicitly.
366: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
367: Moved errno and environ to start.S, saving no byte binary size but
368: speeding up compilation and slightly shortening dietlibc.a ;-)
369: For x86: joined open and close into one assembler file, sharing the
370: errno handling. This is a feasibility test and it actually saves a
371: few bytes. I think I will reimplement the _syscall[1-6] macros on
372: all platforms now to share the errno handling code for them.
373:
374: 0.5.8:
375: fixed strchr to be able to look for 0.
376:
377: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
378: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
379: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
380: contributed by Olaf Dreesen)
381:
382: added execvp, getcwd
383:
384: fixed __xmknod
385:
386: Note: can it be that the ftw interface really is so broken that I
387: cannot implement it without having to implement some searching data
388: structure? I included an experimental ftw implementation that will
389: not follow symlinks.
390:
391: 0.5.7:
392: oops, if_nametoindex was broken!
393:
394: 0.5.6:
395: ported to ppc-linux.
396: fixed i386 sigsetjmp (I mistyped the function name)
397: included sigjmp.c
398:
399: 0.5.5:
400: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
401: actually, it wasn't fork that wasn't working for sparc, it was pipe.
402: I fixed it now.
403: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
404: fixed readdir to use getdents and not the intel inline asm
405:
406: 0.5.4:
407: ported to sparclinux (sparc32 only). Beware: does not work yet.
408: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
409:
410: 0.5.3:
411: added tcsetattr and getenv to compile e3
412:
413: 0.5.2:
414: added vhangup, tcgetattr, isatty and memcmp for fgetty
415: (http://www.fefe.de/fgetty/)
416: added localtime from uC-libc.
417:
418: 0.5.1:
419: stat and friends actually work now. Yuck! Another case of
420: translation between kernel and userland. Why can't the kernel
421: people and the libc people simply agree on a standard?
422: removed many unnecessary includes to speed up compilation.
423: added -fomit-frame-pointer and i386 compilation target to reduce code size.
424: inlined socketcall to reduce code size.
425: "load" and "compile" are examples for djb code.
426:
427: 0.5:
428: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
429: each object file is now treated with "strip -x -R .note -R .comment"
430: split each system call into a separate object file
431: added ntohs, htons, alarm, if_indextoname and if_nametoindex
432:
433: 0.4.1:
434: oops, the strchr implementation was wrong. Thanks Jens Laas!
435:
436: 0.4:
437: copied opendir and friends from uC-libc.
438: added getservent and getservby* in gerservent.c
439:
440: 0.3:
441: remove readdir system call
442: added getdents system call
443: added getpwnam/getpwuid implementation in getpwnam.c
444: added a few string functions (in str*.c)
445:
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