Annotation of dietlibc/CHANGES, revision 1.95
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!)
1.95 ! fefe 30: add setenv
1.74 fefe 31:
1.73 fefe 32: 0.9:
1.65 fefe 33: fixed initgroups (oops)
1.66 fefe 34: Cleanup appending file open for stdio (thanks, James Antill)
35: imported vfprintf fix from James Antill.
1.67 fefe 36: add fnmatch
37: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 38: Olaf added character classes to *scanf.
1.69 fefe 39: Put object and library files into a separate directory (bin-$ARCH).
40: Add "cross" make target to make all architectures.
41: Add "diet" program and man page.
1.70 fefe 42: Add getgrnam, getgrgid
1.71 fefe 43: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 44: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 45:
1.64 fefe 46: 0.8:
1.34 fefe 47: vsnprintf(0,...) estimated the length of strings with a padding width
48: incorrectly.
1.35 fefe 49: new reboot() from Olaf.
1.36 fefe 50: added prototypes for getsockopt and setsockopt.
1.39 fefe 51: added experimental sem* and shm*
1.38 fefe 52: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 53: added setvbuf (only changes mode, not buffer)
1.41 fefe 54: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
55: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 56: added qsort() and bsearch(). Benchmark on 1000 random ints:
57: glibc: 679414 cycles qsort and 3352 cycles bsearch
58: diet libc: 300010 cycles qsort, 553 cycles bsearch
59: I have no idea why glibc is so slow.
1.43 fefe 60: added __isnan (references by libm.a from glibc).
61: added popen() and pclose(). Now the diet libc can link slsh (from
62: S-Lang!)
1.44 fefe 63: corrected usleep. It was more of an msleep until now.
1.45 fefe 64: corrected __dtostr (it looped when trying to format "0.0").
65: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 66: added ungetc (does it work?)
1.47 fefe 67: added inet_aton (yuck!)
1.50 fefe 68: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 69: added h_errno and __h_errno_location
70: added inet_ntoa
1.49 fefe 71: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 72: add bcopy, index, rindex macros
73: add isgraph and isxdigit
1.52 fefe 74: add strftime (ugh!!!)
1.53 olaf 75: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 76: Jeff Garzik contributed a spec file. I put it in contrib and hope
77: everbody knows what to do with it...
78: Olaf checked in a ton of libpthread stuff.
1.55 fefe 79: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 80: add large file backwards compatibility support (so gzip will run on
81: kernel 2.2 and 2.0)
1.57 fefe 82: added shutdown
1.58 fefe 83: added nice
84: added pseudo-locale support for is* (they are now weak aliases,
85: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
86: overwrite the default is* functions.
1.59 fefe 87: added liblatin1.a
1.60 fefe 88: added tzfile implementation (does it work for anyone else?)
1.61 fefe 89: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 90: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
91: Thanks!
1.63 fefe 92: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 93:
1.21 fefe 94: 0.7.2:
95: added several prototypes to already implemented functions and
96: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 97: added prototypes for process group and dup syscalls. Thanks to
98: Abraham again. He also contributed an implementation for daemon(),
99: an ugly BSD hack. I decided to diversify the lib/ directory a
100: little and now created a libugly/ directory for stuff like system()
101: and daemon() ;-)
102: added libstdio and moved all that stdio crap from lib/ there. The
103: idea is to start separating now what we will separate for shared
104: libraries anyway.
1.26 fefe 105: optimized x86 unified-syscall by Olaf.
1.27 fefe 106: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
107: limits.h instead)
108: added remove.c and enough cruft to limits.h to make it compile lzo,
109: lzop and bzip2.
1.28 fefe 110: added mktime, asctime_r, asctime and ctime (needed for gzip).
111: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 112: format some day (man tzfile, ugh!) :-(
1.29 fefe 113: added unlink prototype to unistd.h.
114: added gmtime and gmtime_r.
1.31 fefe 115: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 116: removed readdir glibc compatibility cruft.
1.31 fefe 117: removed stat glibc compatibility cruft.
1.32 fefe 118: oops, my fread was broken for pipes.
1.33 fefe 119: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 120:
1.9 fefe 121: 0.7.1:
1.11 fefe 122: optimized away the static arrays from __ltostr and __lltostr.
123: optimized away the static arrays (and more!) from strtoul and strtoull.
124: added system (by Olaf).
1.12 fefe 125: added tolower and toupper
1.13 fefe 126: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 127: added clone for mips (by Olaf).
128: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 129: added pause for all (by Olaf).
1.17 fefe 130: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 131: added isupper and islower.
132: added putc and putchar as macros.
1.17 fefe 133: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
134: insightful discussions and patches I partially used for the last three)
1.18 fefe 135: added getpriority and setpriority (also by Abraham)
1.19 fefe 136: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 137: oi, setjmp and longjmp were broken on other platforms, too!
138: Thanks to Sébastien Côté for reporting this.
1.9 fefe 139:
140: 0.7:
1.6 olaf 141: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 142: Initial dynamic loading glue for i386, also by Olaf.
143: We don't have a dynamic loader yet, so this is not yet usable.
144: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
145: vsprintf, writev, all by Olaf.
1.2 fefe 146: imported readdir fix from Guillaume. Mhh, can the kernel interface
147: really be this broken?
1.3 fefe 148: Found a kludgy way to detect whether the kernel includes define struct
149: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
150: not work for you, please tell me!
1.4 fefe 151: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 152: Fixed stdio line buffering. The code was already there but I forgot
153: to mark stdio and stdout as line buffered. This should really be
154: done dynamically using isatty, though.
1.8 fefe 155: Removed superfluous "if (1)" in execvp.c
1.1 cvs 156:
157: 0.6.14:
158: *scanf did not append the 0 byte for %s.
159: added creat and changed creat to call open directly instead of open64.
160: did for fread what 0.6.10 did for fwrite.
161: repaired buffered stdio a little (line buffering is still not
162: supported).
163: [All of these bugs have been reported by Guillaume. Thanks!]
164: added __pure__ to strchr and strrchr in <string.h>
165:
166: 0.6.13:
167: included COPYING to make clear that the diet libc is covered by the
168: GNU General Public License (and _not_ the LGPL). That means that
169: you need to obtain a license from me if you want to use the diet
170: libc in a proprietary program that you want to distribute.
171: The x86 unified syscall swapped arguments #4 and #5 and noone
172: noticed until now! Thanks to Guillaume Cottenceau for reporting
173: this!
174: The malloc had a subtle bug with small allocations that could cause
175: segfault. Guillaume reported it, Olaf fixed it.
176:
177: 0.6.12:
178: added assert, statfs and fstatfs
179: added include/net/if.h so fget compiles again.
180:
181: 0.6.11:
182: added putenv.
183:
184: 0.6.10:
185: fixed fwrite. It returned the number of bytes written, not the number
186: of records. Thanks to Albert D. Cahalan for pointing this out.
187: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
188: added brk and sbrk. harold@nb.com.sg made me do it.
189:
190: 0.6.9:
191: fixed execvp not to return on ENOENT
192: did for {open|read|close|seek|tell}dir what I did for stat before.
193: The glibc compatibility part is currently non-functional.
194: fixed white space handling in sscanf " (" would not match " (".
195: fixed printf to accept 'l' flag.
196: fixed getpwuid (ignored last line)
197:
198: 0.6.8:
199: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
200: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
201: added strlcpy and strlcat from OpenBSD.
202: added stat64, fstat64 and lstat64.
203: added endian.h and made ending of strlen.c endianness-aware
204: added string routines size tweak to dietfeatures.h. Most of the
205: string routines have been unrolled. This is up to three times as
206: fast but creates up to three times larger code. Now you can disable
207: the unrolling.
208: added sendfile.
209: I also added pread. It works on x86 and sparc but not on ppc and mips.
210: I have no idea what's going on. strace disagrees with the kernel.
211: Can anyone help? I asked the Linux kernel mailing list for help, too.
212: added a few aliases of the type __libc_open for open. nm on
213: libpthreads.so indicates that we will need them.
214:
215: 0.6.7:
216: the sources now compile without warnings with -Wall.
217: printf now prints "(null)" when %s is passed NULL. This can be
218: removed with WANT_NULL_PRINTF in dietfeatures.h
219: added vfprintf, execl, ttyname.
220: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
221: __dietfstat so they can use the normal kernel struct stat.
222: stat, lstat and fstat are now C wrappers that convert to the glibc
223: struct stat. So we can avoid that overhead for programs that use
224: dietlibc headers.
225:
226: 0.6.6:
227: changed the Makefiles so you can now set CFLAGS on the command line
228: added memccmp (analogous to memccpy) and strncmp.
229: Olaf fixed another bug in the sparc unified syscall.
230: Paul Clifford contributed a C version of his strlen.S that is much
231: more efficient than the previous strlen on all platforms! It also
232: looks like technology from Roswell. ;-}
233: added a "real" stdio. Well, almost. Please contribute!
234: added dietfeatures.h so you can remove features you don't need.
235: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
236: stdio now works with simple programs and minigzip from libz.
237: stdio uses some major trickery to avoid linking the stdio, stderr and
238: stdout (and reserving space for them) when they are not used.
239:
240: 0.6.5:
241: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
242: most of them bugs in the new header files, but also missing sigset
243: functions.
244: Paul Clifford contributed an assembly strlen.S for ARM and fixed
245: several bugs.
246: Fixed ppc/setjmp and mips/pipe.
247: Olaf contributed a new sparc unified syscall.
248:
249: 0.6.4:
250: declared is* static inline in getservent.
251: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
252: changed strlen to return 0 when passed NULL.
253: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
254: Scientist who actually implemented this without access to a MIPS
255: box, just from reading the architecture manual. And it worked out
256: of the box.
257: started a set of system includes, mainly so that I can use lcc and
258: my alpha-linux cross compiler (which is unable to cross-compile
259: glibc). diet libc can now be compiled without any include files
260: from a normal libc. The includes do declare more than diet libc
261: currently delivers and they are still far from complete for real
262: applications.
263: I will only add assembly versions that are smaller _and_ faster than
264: the C version. Larger routines are only accepted if they are called
265: very often and are substantially faster.
266: added i386 assembly strchr, which is smaller and faster than the old
267: version. It is, however, larger than the version contributed by
268: proton (thanks, anyway).
269: added i386 strlen (31% faster, 14% smaller)
270: "make t" will now create a map file called "mapfile".
271:
272: 0.6.3:
273: added sys_errlist, strerror and perror
274: added isblank
275: added atol
276:
277: 0.6.2:
278: mmap for ARM didn't compile. Thanks, Paul!
279:
280: 0.6.1:
281: split mmap into the architecture specific subdirectories.
282: getenv now copes with environ==NULL, thanks Paul Clifford.
283: Paul also contributed a smaller ARM startup code.
284:
285: 0.6:
286: strcat returned the wrong result. Thanks, Dietz Pröpper.
287: strtod now understands a negative exponent (oops, thanks Bertram Barth)
288: Port to arm-linux-gnu, but on the Netwinder I use for testing the
289: __dtostr does not work (I have no idea why!)
290: The MIPS port now uses (much smaller) non-PIC code. That means that
291: the applications you link against diet libc also have to be compiled
292: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
293: Thanks to Ralf Bächle for helping me with this!
294: I made subdirectories for the architectures and use VPATH to override
295: VPATH so that make finds the source file automatically. That should
296: simplify the sources greatly.
297: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
298: ARM and MIPS now also have setjmp and longjmp
299: "compile" and "load" are now make targets. Use them for djb programs.
300: added contrib/elftrunc.c which will remove unnecessary ELF headers.
301: Again, contributed from Olaf. Great work!
302:
303: 0.5.12:
304: printf also does signed numbers.
305: If you don't use atexit, dietlibc now does not link exit, only _exit.
306: *printf now correctly returns the number of bytes written.
307: Olaf contributed experimental sscanf and vsscanf implementations.
308: If passed NULL as buffer, snprintf will not write anything but still
309: return the number of bytes it would have written.
310: Initial MIPS port! (Oh, the agony!)
311: No setjmp and longjmp support yet! Please contribute!
312: I even implemented unified syscalls for MIPS. Still, MIPS code is
313: almost twice the size of SPARC code. If anyone knows why: please
314: tell me!
315:
316: 0.5.11:
317: I implemented new unified syscalls for x86, sparc and ppc, this time based
318: on .s files and not .c files, and I moved the syscalls into
319: subdirectores to clean the dietlibc sources up a little.
320: A binary consisting of printf("%s is %d\n","olaf",23) is now
321: 2864 bytes on sparc
322: 2488 bytes on intel
323: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
324: to make a few more applications work.
325: Olaf Dreesen also implemented some unified syscall stuff for x86.
326: He discovered that with our unified syscall interface it actually
327: costs <10 bytes total to make all system calls thread safe!
328: I implemented atexit() (can register up to 4 callbacks).
329: I implemented strtod and __dtostr (the opposite). Now we can add
330: floating point support to vsnprintf and sscanf!
331:
332: 0.5.10:
333: I actually saw that I can not only merge the errno handling code of
334: the system calls on x86, I can also merge the rest (including the
335: arguments) except for setting the system call number. All those
336: system calls are now just a jump to a unified system call handler.
337: I got rid of x86openclose again. The savings are substantial:
338: chown from embutils went from 7664 to 7184 bytes!
339: If I'd move the system call wrappers to assembly language, I could
340: even reduce the alignment (does not matter since it's just a jump
341: anyway) and get rid of the "ret" behind each jump (one byte per
342: system call!)
343:
344: 0.5.9:
345: added memchr, strpbrk, strstr, strtol, isspace (hehe)
346: fixed strdup
347: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
348: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
349: (no signed integers, only strings and unsigned integers (but
350: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
351: that code must be wonderful, I don't understand it at all *bg*)
352: Olaf's printf does understand padding like in "%08d" and "%8d" and
353: automatically pads pointers with '0'.
354: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
355: Thanks to proton for inspiration on this.
356: The new x86 start code also does not reference exit any more, thus saving
357: 64 bytes for executables that don't call exit explicitly.
358: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
359: Moved errno and environ to start.S, saving no byte binary size but
360: speeding up compilation and slightly shortening dietlibc.a ;-)
361: For x86: joined open and close into one assembler file, sharing the
362: errno handling. This is a feasibility test and it actually saves a
363: few bytes. I think I will reimplement the _syscall[1-6] macros on
364: all platforms now to share the errno handling code for them.
365:
366: 0.5.8:
367: fixed strchr to be able to look for 0.
368:
369: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
370: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
371: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
372: contributed by Olaf Dreesen)
373:
374: added execvp, getcwd
375:
376: fixed __xmknod
377:
378: Note: can it be that the ftw interface really is so broken that I
379: cannot implement it without having to implement some searching data
380: structure? I included an experimental ftw implementation that will
381: not follow symlinks.
382:
383: 0.5.7:
384: oops, if_nametoindex was broken!
385:
386: 0.5.6:
387: ported to ppc-linux.
388: fixed i386 sigsetjmp (I mistyped the function name)
389: included sigjmp.c
390:
391: 0.5.5:
392: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
393: actually, it wasn't fork that wasn't working for sparc, it was pipe.
394: I fixed it now.
395: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
396: fixed readdir to use getdents and not the intel inline asm
397:
398: 0.5.4:
399: ported to sparclinux (sparc32 only). Beware: does not work yet.
400: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
401:
402: 0.5.3:
403: added tcsetattr and getenv to compile e3
404:
405: 0.5.2:
406: added vhangup, tcgetattr, isatty and memcmp for fgetty
407: (http://www.fefe.de/fgetty/)
408: added localtime from uC-libc.
409:
410: 0.5.1:
411: stat and friends actually work now. Yuck! Another case of
412: translation between kernel and userland. Why can't the kernel
413: people and the libc people simply agree on a standard?
414: removed many unnecessary includes to speed up compilation.
415: added -fomit-frame-pointer and i386 compilation target to reduce code size.
416: inlined socketcall to reduce code size.
417: "load" and "compile" are examples for djb code.
418:
419: 0.5:
420: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
421: each object file is now treated with "strip -x -R .note -R .comment"
422: split each system call into a separate object file
423: added ntohs, htons, alarm, if_indextoname and if_nametoindex
424:
425: 0.4.1:
426: oops, the strchr implementation was wrong. Thanks Jens Laas!
427:
428: 0.4:
429: copied opendir and friends from uC-libc.
430: added getservent and getservby* in gerservent.c
431:
432: 0.3:
433: remove readdir system call
434: added getdents system call
435: added getpwnam/getpwuid implementation in getpwnam.c
436: added a few string functions (in str*.c)
437:
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