Annotation of dietlibc/CHANGES, revision 1.91
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.
1.91 ! fefe 27: add sysinfo.
1.74 fefe 28:
1.73 fefe 29: 0.9:
1.65 fefe 30: fixed initgroups (oops)
1.66 fefe 31: Cleanup appending file open for stdio (thanks, James Antill)
32: imported vfprintf fix from James Antill.
1.67 fefe 33: add fnmatch
34: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 35: Olaf added character classes to *scanf.
1.69 fefe 36: Put object and library files into a separate directory (bin-$ARCH).
37: Add "cross" make target to make all architectures.
38: Add "diet" program and man page.
1.70 fefe 39: Add getgrnam, getgrgid
1.71 fefe 40: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 41: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 42:
1.64 fefe 43: 0.8:
1.34 fefe 44: vsnprintf(0,...) estimated the length of strings with a padding width
45: incorrectly.
1.35 fefe 46: new reboot() from Olaf.
1.36 fefe 47: added prototypes for getsockopt and setsockopt.
1.39 fefe 48: added experimental sem* and shm*
1.38 fefe 49: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 50: added setvbuf (only changes mode, not buffer)
1.41 fefe 51: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
52: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 53: added qsort() and bsearch(). Benchmark on 1000 random ints:
54: glibc: 679414 cycles qsort and 3352 cycles bsearch
55: diet libc: 300010 cycles qsort, 553 cycles bsearch
56: I have no idea why glibc is so slow.
1.43 fefe 57: added __isnan (references by libm.a from glibc).
58: added popen() and pclose(). Now the diet libc can link slsh (from
59: S-Lang!)
1.44 fefe 60: corrected usleep. It was more of an msleep until now.
1.45 fefe 61: corrected __dtostr (it looped when trying to format "0.0").
62: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 63: added ungetc (does it work?)
1.47 fefe 64: added inet_aton (yuck!)
1.50 fefe 65: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 66: added h_errno and __h_errno_location
67: added inet_ntoa
1.49 fefe 68: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 69: add bcopy, index, rindex macros
70: add isgraph and isxdigit
1.52 fefe 71: add strftime (ugh!!!)
1.53 olaf 72: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 73: Jeff Garzik contributed a spec file. I put it in contrib and hope
74: everbody knows what to do with it...
75: Olaf checked in a ton of libpthread stuff.
1.55 fefe 76: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 77: add large file backwards compatibility support (so gzip will run on
78: kernel 2.2 and 2.0)
1.57 fefe 79: added shutdown
1.58 fefe 80: added nice
81: added pseudo-locale support for is* (they are now weak aliases,
82: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
83: overwrite the default is* functions.
1.59 fefe 84: added liblatin1.a
1.60 fefe 85: added tzfile implementation (does it work for anyone else?)
1.61 fefe 86: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 87: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
88: Thanks!
1.63 fefe 89: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 90:
1.21 fefe 91: 0.7.2:
92: added several prototypes to already implemented functions and
93: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 94: added prototypes for process group and dup syscalls. Thanks to
95: Abraham again. He also contributed an implementation for daemon(),
96: an ugly BSD hack. I decided to diversify the lib/ directory a
97: little and now created a libugly/ directory for stuff like system()
98: and daemon() ;-)
99: added libstdio and moved all that stdio crap from lib/ there. The
100: idea is to start separating now what we will separate for shared
101: libraries anyway.
1.26 fefe 102: optimized x86 unified-syscall by Olaf.
1.27 fefe 103: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
104: limits.h instead)
105: added remove.c and enough cruft to limits.h to make it compile lzo,
106: lzop and bzip2.
1.28 fefe 107: added mktime, asctime_r, asctime and ctime (needed for gzip).
108: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 109: format some day (man tzfile, ugh!) :-(
1.29 fefe 110: added unlink prototype to unistd.h.
111: added gmtime and gmtime_r.
1.31 fefe 112: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 113: removed readdir glibc compatibility cruft.
1.31 fefe 114: removed stat glibc compatibility cruft.
1.32 fefe 115: oops, my fread was broken for pipes.
1.33 fefe 116: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 117:
1.9 fefe 118: 0.7.1:
1.11 fefe 119: optimized away the static arrays from __ltostr and __lltostr.
120: optimized away the static arrays (and more!) from strtoul and strtoull.
121: added system (by Olaf).
1.12 fefe 122: added tolower and toupper
1.13 fefe 123: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 124: added clone for mips (by Olaf).
125: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 126: added pause for all (by Olaf).
1.17 fefe 127: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 128: added isupper and islower.
129: added putc and putchar as macros.
1.17 fefe 130: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
131: insightful discussions and patches I partially used for the last three)
1.18 fefe 132: added getpriority and setpriority (also by Abraham)
1.19 fefe 133: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 134: oi, setjmp and longjmp were broken on other platforms, too!
135: Thanks to Sébastien Côté for reporting this.
1.9 fefe 136:
137: 0.7:
1.6 olaf 138: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 139: Initial dynamic loading glue for i386, also by Olaf.
140: We don't have a dynamic loader yet, so this is not yet usable.
141: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
142: vsprintf, writev, all by Olaf.
1.2 fefe 143: imported readdir fix from Guillaume. Mhh, can the kernel interface
144: really be this broken?
1.3 fefe 145: Found a kludgy way to detect whether the kernel includes define struct
146: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
147: not work for you, please tell me!
1.4 fefe 148: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 149: Fixed stdio line buffering. The code was already there but I forgot
150: to mark stdio and stdout as line buffered. This should really be
151: done dynamically using isatty, though.
1.8 fefe 152: Removed superfluous "if (1)" in execvp.c
1.1 cvs 153:
154: 0.6.14:
155: *scanf did not append the 0 byte for %s.
156: added creat and changed creat to call open directly instead of open64.
157: did for fread what 0.6.10 did for fwrite.
158: repaired buffered stdio a little (line buffering is still not
159: supported).
160: [All of these bugs have been reported by Guillaume. Thanks!]
161: added __pure__ to strchr and strrchr in <string.h>
162:
163: 0.6.13:
164: included COPYING to make clear that the diet libc is covered by the
165: GNU General Public License (and _not_ the LGPL). That means that
166: you need to obtain a license from me if you want to use the diet
167: libc in a proprietary program that you want to distribute.
168: The x86 unified syscall swapped arguments #4 and #5 and noone
169: noticed until now! Thanks to Guillaume Cottenceau for reporting
170: this!
171: The malloc had a subtle bug with small allocations that could cause
172: segfault. Guillaume reported it, Olaf fixed it.
173:
174: 0.6.12:
175: added assert, statfs and fstatfs
176: added include/net/if.h so fget compiles again.
177:
178: 0.6.11:
179: added putenv.
180:
181: 0.6.10:
182: fixed fwrite. It returned the number of bytes written, not the number
183: of records. Thanks to Albert D. Cahalan for pointing this out.
184: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
185: added brk and sbrk. harold@nb.com.sg made me do it.
186:
187: 0.6.9:
188: fixed execvp not to return on ENOENT
189: did for {open|read|close|seek|tell}dir what I did for stat before.
190: The glibc compatibility part is currently non-functional.
191: fixed white space handling in sscanf " (" would not match " (".
192: fixed printf to accept 'l' flag.
193: fixed getpwuid (ignored last line)
194:
195: 0.6.8:
196: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
197: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
198: added strlcpy and strlcat from OpenBSD.
199: added stat64, fstat64 and lstat64.
200: added endian.h and made ending of strlen.c endianness-aware
201: added string routines size tweak to dietfeatures.h. Most of the
202: string routines have been unrolled. This is up to three times as
203: fast but creates up to three times larger code. Now you can disable
204: the unrolling.
205: added sendfile.
206: I also added pread. It works on x86 and sparc but not on ppc and mips.
207: I have no idea what's going on. strace disagrees with the kernel.
208: Can anyone help? I asked the Linux kernel mailing list for help, too.
209: added a few aliases of the type __libc_open for open. nm on
210: libpthreads.so indicates that we will need them.
211:
212: 0.6.7:
213: the sources now compile without warnings with -Wall.
214: printf now prints "(null)" when %s is passed NULL. This can be
215: removed with WANT_NULL_PRINTF in dietfeatures.h
216: added vfprintf, execl, ttyname.
217: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
218: __dietfstat so they can use the normal kernel struct stat.
219: stat, lstat and fstat are now C wrappers that convert to the glibc
220: struct stat. So we can avoid that overhead for programs that use
221: dietlibc headers.
222:
223: 0.6.6:
224: changed the Makefiles so you can now set CFLAGS on the command line
225: added memccmp (analogous to memccpy) and strncmp.
226: Olaf fixed another bug in the sparc unified syscall.
227: Paul Clifford contributed a C version of his strlen.S that is much
228: more efficient than the previous strlen on all platforms! It also
229: looks like technology from Roswell. ;-}
230: added a "real" stdio. Well, almost. Please contribute!
231: added dietfeatures.h so you can remove features you don't need.
232: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
233: stdio now works with simple programs and minigzip from libz.
234: stdio uses some major trickery to avoid linking the stdio, stderr and
235: stdout (and reserving space for them) when they are not used.
236:
237: 0.6.5:
238: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
239: most of them bugs in the new header files, but also missing sigset
240: functions.
241: Paul Clifford contributed an assembly strlen.S for ARM and fixed
242: several bugs.
243: Fixed ppc/setjmp and mips/pipe.
244: Olaf contributed a new sparc unified syscall.
245:
246: 0.6.4:
247: declared is* static inline in getservent.
248: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
249: changed strlen to return 0 when passed NULL.
250: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
251: Scientist who actually implemented this without access to a MIPS
252: box, just from reading the architecture manual. And it worked out
253: of the box.
254: started a set of system includes, mainly so that I can use lcc and
255: my alpha-linux cross compiler (which is unable to cross-compile
256: glibc). diet libc can now be compiled without any include files
257: from a normal libc. The includes do declare more than diet libc
258: currently delivers and they are still far from complete for real
259: applications.
260: I will only add assembly versions that are smaller _and_ faster than
261: the C version. Larger routines are only accepted if they are called
262: very often and are substantially faster.
263: added i386 assembly strchr, which is smaller and faster than the old
264: version. It is, however, larger than the version contributed by
265: proton (thanks, anyway).
266: added i386 strlen (31% faster, 14% smaller)
267: "make t" will now create a map file called "mapfile".
268:
269: 0.6.3:
270: added sys_errlist, strerror and perror
271: added isblank
272: added atol
273:
274: 0.6.2:
275: mmap for ARM didn't compile. Thanks, Paul!
276:
277: 0.6.1:
278: split mmap into the architecture specific subdirectories.
279: getenv now copes with environ==NULL, thanks Paul Clifford.
280: Paul also contributed a smaller ARM startup code.
281:
282: 0.6:
283: strcat returned the wrong result. Thanks, Dietz Pröpper.
284: strtod now understands a negative exponent (oops, thanks Bertram Barth)
285: Port to arm-linux-gnu, but on the Netwinder I use for testing the
286: __dtostr does not work (I have no idea why!)
287: The MIPS port now uses (much smaller) non-PIC code. That means that
288: the applications you link against diet libc also have to be compiled
289: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
290: Thanks to Ralf Bächle for helping me with this!
291: I made subdirectories for the architectures and use VPATH to override
292: VPATH so that make finds the source file automatically. That should
293: simplify the sources greatly.
294: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
295: ARM and MIPS now also have setjmp and longjmp
296: "compile" and "load" are now make targets. Use them for djb programs.
297: added contrib/elftrunc.c which will remove unnecessary ELF headers.
298: Again, contributed from Olaf. Great work!
299:
300: 0.5.12:
301: printf also does signed numbers.
302: If you don't use atexit, dietlibc now does not link exit, only _exit.
303: *printf now correctly returns the number of bytes written.
304: Olaf contributed experimental sscanf and vsscanf implementations.
305: If passed NULL as buffer, snprintf will not write anything but still
306: return the number of bytes it would have written.
307: Initial MIPS port! (Oh, the agony!)
308: No setjmp and longjmp support yet! Please contribute!
309: I even implemented unified syscalls for MIPS. Still, MIPS code is
310: almost twice the size of SPARC code. If anyone knows why: please
311: tell me!
312:
313: 0.5.11:
314: I implemented new unified syscalls for x86, sparc and ppc, this time based
315: on .s files and not .c files, and I moved the syscalls into
316: subdirectores to clean the dietlibc sources up a little.
317: A binary consisting of printf("%s is %d\n","olaf",23) is now
318: 2864 bytes on sparc
319: 2488 bytes on intel
320: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
321: to make a few more applications work.
322: Olaf Dreesen also implemented some unified syscall stuff for x86.
323: He discovered that with our unified syscall interface it actually
324: costs <10 bytes total to make all system calls thread safe!
325: I implemented atexit() (can register up to 4 callbacks).
326: I implemented strtod and __dtostr (the opposite). Now we can add
327: floating point support to vsnprintf and sscanf!
328:
329: 0.5.10:
330: I actually saw that I can not only merge the errno handling code of
331: the system calls on x86, I can also merge the rest (including the
332: arguments) except for setting the system call number. All those
333: system calls are now just a jump to a unified system call handler.
334: I got rid of x86openclose again. The savings are substantial:
335: chown from embutils went from 7664 to 7184 bytes!
336: If I'd move the system call wrappers to assembly language, I could
337: even reduce the alignment (does not matter since it's just a jump
338: anyway) and get rid of the "ret" behind each jump (one byte per
339: system call!)
340:
341: 0.5.9:
342: added memchr, strpbrk, strstr, strtol, isspace (hehe)
343: fixed strdup
344: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
345: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
346: (no signed integers, only strings and unsigned integers (but
347: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
348: that code must be wonderful, I don't understand it at all *bg*)
349: Olaf's printf does understand padding like in "%08d" and "%8d" and
350: automatically pads pointers with '0'.
351: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
352: Thanks to proton for inspiration on this.
353: The new x86 start code also does not reference exit any more, thus saving
354: 64 bytes for executables that don't call exit explicitly.
355: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
356: Moved errno and environ to start.S, saving no byte binary size but
357: speeding up compilation and slightly shortening dietlibc.a ;-)
358: For x86: joined open and close into one assembler file, sharing the
359: errno handling. This is a feasibility test and it actually saves a
360: few bytes. I think I will reimplement the _syscall[1-6] macros on
361: all platforms now to share the errno handling code for them.
362:
363: 0.5.8:
364: fixed strchr to be able to look for 0.
365:
366: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
367: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
368: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
369: contributed by Olaf Dreesen)
370:
371: added execvp, getcwd
372:
373: fixed __xmknod
374:
375: Note: can it be that the ftw interface really is so broken that I
376: cannot implement it without having to implement some searching data
377: structure? I included an experimental ftw implementation that will
378: not follow symlinks.
379:
380: 0.5.7:
381: oops, if_nametoindex was broken!
382:
383: 0.5.6:
384: ported to ppc-linux.
385: fixed i386 sigsetjmp (I mistyped the function name)
386: included sigjmp.c
387:
388: 0.5.5:
389: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
390: actually, it wasn't fork that wasn't working for sparc, it was pipe.
391: I fixed it now.
392: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
393: fixed readdir to use getdents and not the intel inline asm
394:
395: 0.5.4:
396: ported to sparclinux (sparc32 only). Beware: does not work yet.
397: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
398:
399: 0.5.3:
400: added tcsetattr and getenv to compile e3
401:
402: 0.5.2:
403: added vhangup, tcgetattr, isatty and memcmp for fgetty
404: (http://www.fefe.de/fgetty/)
405: added localtime from uC-libc.
406:
407: 0.5.1:
408: stat and friends actually work now. Yuck! Another case of
409: translation between kernel and userland. Why can't the kernel
410: people and the libc people simply agree on a standard?
411: removed many unnecessary includes to speed up compilation.
412: added -fomit-frame-pointer and i386 compilation target to reduce code size.
413: inlined socketcall to reduce code size.
414: "load" and "compile" are examples for djb code.
415:
416: 0.5:
417: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
418: each object file is now treated with "strip -x -R .note -R .comment"
419: split each system call into a separate object file
420: added ntohs, htons, alarm, if_indextoname and if_nametoindex
421:
422: 0.4.1:
423: oops, the strchr implementation was wrong. Thanks Jens Laas!
424:
425: 0.4:
426: copied opendir and friends from uC-libc.
427: added getservent and getservby* in gerservent.c
428:
429: 0.3:
430: remove readdir system call
431: added getdents system call
432: added getpwnam/getpwuid implementation in getpwnam.c
433: added a few string functions (in str*.c)
434:
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