Annotation of dietlibc/CHANGES, revision 1.45
1.34 fefe 1: 0.7.3:
2: vsnprintf(0,...) estimated the length of strings with a padding width
3: incorrectly.
1.35 fefe 4: new reboot() from Olaf.
1.36 fefe 5: added prototypes for getsockopt and setsockopt.
1.39 fefe 6: added experimental sem* and shm*
1.38 fefe 7: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 8: added setvbuf (only changes mode, not buffer)
1.41 fefe 9: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
10: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 11: added qsort() and bsearch(). Benchmark on 1000 random ints:
12: glibc: 679414 cycles qsort and 3352 cycles bsearch
13: diet libc: 300010 cycles qsort, 553 cycles bsearch
14: I have no idea why glibc is so slow.
1.43 fefe 15: added __isnan (references by libm.a from glibc).
16: added popen() and pclose(). Now the diet libc can link slsh (from
17: S-Lang!)
1.44 fefe 18: corrected usleep. It was more of an msleep until now.
1.45 ! fefe 19: corrected __dtostr (it looped when trying to format "0.0").
! 20: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.34 fefe 21:
1.21 fefe 22: 0.7.2:
23: added several prototypes to already implemented functions and
24: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 25: added prototypes for process group and dup syscalls. Thanks to
26: Abraham again. He also contributed an implementation for daemon(),
27: an ugly BSD hack. I decided to diversify the lib/ directory a
28: little and now created a libugly/ directory for stuff like system()
29: and daemon() ;-)
30: added libstdio and moved all that stdio crap from lib/ there. The
31: idea is to start separating now what we will separate for shared
32: libraries anyway.
1.26 fefe 33: optimized x86 unified-syscall by Olaf.
1.27 fefe 34: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
35: limits.h instead)
36: added remove.c and enough cruft to limits.h to make it compile lzo,
37: lzop and bzip2.
1.28 fefe 38: added mktime, asctime_r, asctime and ctime (needed for gzip).
39: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 40: format some day (man tzfile, ugh!) :-(
1.29 fefe 41: added unlink prototype to unistd.h.
42: added gmtime and gmtime_r.
1.31 fefe 43: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 44: removed readdir glibc compatibility cruft.
1.31 fefe 45: removed stat glibc compatibility cruft.
1.32 fefe 46: oops, my fread was broken for pipes.
1.33 fefe 47: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 48:
1.9 fefe 49: 0.7.1:
1.11 fefe 50: optimized away the static arrays from __ltostr and __lltostr.
51: optimized away the static arrays (and more!) from strtoul and strtoull.
52: added system (by Olaf).
1.12 fefe 53: added tolower and toupper
1.13 fefe 54: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 55: added clone for mips (by Olaf).
56: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 57: added pause for all (by Olaf).
1.17 fefe 58: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 59: added isupper and islower.
60: added putc and putchar as macros.
1.17 fefe 61: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
62: insightful discussions and patches I partially used for the last three)
1.18 fefe 63: added getpriority and setpriority (also by Abraham)
1.19 fefe 64: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 65: oi, setjmp and longjmp were broken on other platforms, too!
66: Thanks to Sébastien Côté for reporting this.
1.9 fefe 67:
68: 0.7:
1.6 olaf 69: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 70: Initial dynamic loading glue for i386, also by Olaf.
71: We don't have a dynamic loader yet, so this is not yet usable.
72: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
73: vsprintf, writev, all by Olaf.
1.2 fefe 74: imported readdir fix from Guillaume. Mhh, can the kernel interface
75: really be this broken?
1.3 fefe 76: Found a kludgy way to detect whether the kernel includes define struct
77: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
78: not work for you, please tell me!
1.4 fefe 79: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 80: Fixed stdio line buffering. The code was already there but I forgot
81: to mark stdio and stdout as line buffered. This should really be
82: done dynamically using isatty, though.
1.8 fefe 83: Removed superfluous "if (1)" in execvp.c
1.1 cvs 84:
85: 0.6.14:
86: *scanf did not append the 0 byte for %s.
87: added creat and changed creat to call open directly instead of open64.
88: did for fread what 0.6.10 did for fwrite.
89: repaired buffered stdio a little (line buffering is still not
90: supported).
91: [All of these bugs have been reported by Guillaume. Thanks!]
92: added __pure__ to strchr and strrchr in <string.h>
93:
94: 0.6.13:
95: included COPYING to make clear that the diet libc is covered by the
96: GNU General Public License (and _not_ the LGPL). That means that
97: you need to obtain a license from me if you want to use the diet
98: libc in a proprietary program that you want to distribute.
99: The x86 unified syscall swapped arguments #4 and #5 and noone
100: noticed until now! Thanks to Guillaume Cottenceau for reporting
101: this!
102: The malloc had a subtle bug with small allocations that could cause
103: segfault. Guillaume reported it, Olaf fixed it.
104:
105: 0.6.12:
106: added assert, statfs and fstatfs
107: added include/net/if.h so fget compiles again.
108:
109: 0.6.11:
110: added putenv.
111:
112: 0.6.10:
113: fixed fwrite. It returned the number of bytes written, not the number
114: of records. Thanks to Albert D. Cahalan for pointing this out.
115: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
116: added brk and sbrk. harold@nb.com.sg made me do it.
117:
118: 0.6.9:
119: fixed execvp not to return on ENOENT
120: did for {open|read|close|seek|tell}dir what I did for stat before.
121: The glibc compatibility part is currently non-functional.
122: fixed white space handling in sscanf " (" would not match " (".
123: fixed printf to accept 'l' flag.
124: fixed getpwuid (ignored last line)
125:
126: 0.6.8:
127: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
128: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
129: added strlcpy and strlcat from OpenBSD.
130: added stat64, fstat64 and lstat64.
131: added endian.h and made ending of strlen.c endianness-aware
132: added string routines size tweak to dietfeatures.h. Most of the
133: string routines have been unrolled. This is up to three times as
134: fast but creates up to three times larger code. Now you can disable
135: the unrolling.
136: added sendfile.
137: I also added pread. It works on x86 and sparc but not on ppc and mips.
138: I have no idea what's going on. strace disagrees with the kernel.
139: Can anyone help? I asked the Linux kernel mailing list for help, too.
140: added a few aliases of the type __libc_open for open. nm on
141: libpthreads.so indicates that we will need them.
142:
143: 0.6.7:
144: the sources now compile without warnings with -Wall.
145: printf now prints "(null)" when %s is passed NULL. This can be
146: removed with WANT_NULL_PRINTF in dietfeatures.h
147: added vfprintf, execl, ttyname.
148: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
149: __dietfstat so they can use the normal kernel struct stat.
150: stat, lstat and fstat are now C wrappers that convert to the glibc
151: struct stat. So we can avoid that overhead for programs that use
152: dietlibc headers.
153:
154: 0.6.6:
155: changed the Makefiles so you can now set CFLAGS on the command line
156: added memccmp (analogous to memccpy) and strncmp.
157: Olaf fixed another bug in the sparc unified syscall.
158: Paul Clifford contributed a C version of his strlen.S that is much
159: more efficient than the previous strlen on all platforms! It also
160: looks like technology from Roswell. ;-}
161: added a "real" stdio. Well, almost. Please contribute!
162: added dietfeatures.h so you can remove features you don't need.
163: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
164: stdio now works with simple programs and minigzip from libz.
165: stdio uses some major trickery to avoid linking the stdio, stderr and
166: stdout (and reserving space for them) when they are not used.
167:
168: 0.6.5:
169: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
170: most of them bugs in the new header files, but also missing sigset
171: functions.
172: Paul Clifford contributed an assembly strlen.S for ARM and fixed
173: several bugs.
174: Fixed ppc/setjmp and mips/pipe.
175: Olaf contributed a new sparc unified syscall.
176:
177: 0.6.4:
178: declared is* static inline in getservent.
179: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
180: changed strlen to return 0 when passed NULL.
181: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
182: Scientist who actually implemented this without access to a MIPS
183: box, just from reading the architecture manual. And it worked out
184: of the box.
185: started a set of system includes, mainly so that I can use lcc and
186: my alpha-linux cross compiler (which is unable to cross-compile
187: glibc). diet libc can now be compiled without any include files
188: from a normal libc. The includes do declare more than diet libc
189: currently delivers and they are still far from complete for real
190: applications.
191: I will only add assembly versions that are smaller _and_ faster than
192: the C version. Larger routines are only accepted if they are called
193: very often and are substantially faster.
194: added i386 assembly strchr, which is smaller and faster than the old
195: version. It is, however, larger than the version contributed by
196: proton (thanks, anyway).
197: added i386 strlen (31% faster, 14% smaller)
198: "make t" will now create a map file called "mapfile".
199:
200: 0.6.3:
201: added sys_errlist, strerror and perror
202: added isblank
203: added atol
204:
205: 0.6.2:
206: mmap for ARM didn't compile. Thanks, Paul!
207:
208: 0.6.1:
209: split mmap into the architecture specific subdirectories.
210: getenv now copes with environ==NULL, thanks Paul Clifford.
211: Paul also contributed a smaller ARM startup code.
212:
213: 0.6:
214: strcat returned the wrong result. Thanks, Dietz Pröpper.
215: strtod now understands a negative exponent (oops, thanks Bertram Barth)
216: Port to arm-linux-gnu, but on the Netwinder I use for testing the
217: __dtostr does not work (I have no idea why!)
218: The MIPS port now uses (much smaller) non-PIC code. That means that
219: the applications you link against diet libc also have to be compiled
220: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
221: Thanks to Ralf Bächle for helping me with this!
222: I made subdirectories for the architectures and use VPATH to override
223: VPATH so that make finds the source file automatically. That should
224: simplify the sources greatly.
225: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
226: ARM and MIPS now also have setjmp and longjmp
227: "compile" and "load" are now make targets. Use them for djb programs.
228: added contrib/elftrunc.c which will remove unnecessary ELF headers.
229: Again, contributed from Olaf. Great work!
230:
231: 0.5.12:
232: printf also does signed numbers.
233: If you don't use atexit, dietlibc now does not link exit, only _exit.
234: *printf now correctly returns the number of bytes written.
235: Olaf contributed experimental sscanf and vsscanf implementations.
236: If passed NULL as buffer, snprintf will not write anything but still
237: return the number of bytes it would have written.
238: Initial MIPS port! (Oh, the agony!)
239: No setjmp and longjmp support yet! Please contribute!
240: I even implemented unified syscalls for MIPS. Still, MIPS code is
241: almost twice the size of SPARC code. If anyone knows why: please
242: tell me!
243:
244: 0.5.11:
245: I implemented new unified syscalls for x86, sparc and ppc, this time based
246: on .s files and not .c files, and I moved the syscalls into
247: subdirectores to clean the dietlibc sources up a little.
248: A binary consisting of printf("%s is %d\n","olaf",23) is now
249: 2864 bytes on sparc
250: 2488 bytes on intel
251: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
252: to make a few more applications work.
253: Olaf Dreesen also implemented some unified syscall stuff for x86.
254: He discovered that with our unified syscall interface it actually
255: costs <10 bytes total to make all system calls thread safe!
256: I implemented atexit() (can register up to 4 callbacks).
257: I implemented strtod and __dtostr (the opposite). Now we can add
258: floating point support to vsnprintf and sscanf!
259:
260: 0.5.10:
261: I actually saw that I can not only merge the errno handling code of
262: the system calls on x86, I can also merge the rest (including the
263: arguments) except for setting the system call number. All those
264: system calls are now just a jump to a unified system call handler.
265: I got rid of x86openclose again. The savings are substantial:
266: chown from embutils went from 7664 to 7184 bytes!
267: If I'd move the system call wrappers to assembly language, I could
268: even reduce the alignment (does not matter since it's just a jump
269: anyway) and get rid of the "ret" behind each jump (one byte per
270: system call!)
271:
272: 0.5.9:
273: added memchr, strpbrk, strstr, strtol, isspace (hehe)
274: fixed strdup
275: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
276: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
277: (no signed integers, only strings and unsigned integers (but
278: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
279: that code must be wonderful, I don't understand it at all *bg*)
280: Olaf's printf does understand padding like in "%08d" and "%8d" and
281: automatically pads pointers with '0'.
282: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
283: Thanks to proton for inspiration on this.
284: The new x86 start code also does not reference exit any more, thus saving
285: 64 bytes for executables that don't call exit explicitly.
286: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
287: Moved errno and environ to start.S, saving no byte binary size but
288: speeding up compilation and slightly shortening dietlibc.a ;-)
289: For x86: joined open and close into one assembler file, sharing the
290: errno handling. This is a feasibility test and it actually saves a
291: few bytes. I think I will reimplement the _syscall[1-6] macros on
292: all platforms now to share the errno handling code for them.
293:
294: 0.5.8:
295: fixed strchr to be able to look for 0.
296:
297: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
298: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
299: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
300: contributed by Olaf Dreesen)
301:
302: added execvp, getcwd
303:
304: fixed __xmknod
305:
306: Note: can it be that the ftw interface really is so broken that I
307: cannot implement it without having to implement some searching data
308: structure? I included an experimental ftw implementation that will
309: not follow symlinks.
310:
311: 0.5.7:
312: oops, if_nametoindex was broken!
313:
314: 0.5.6:
315: ported to ppc-linux.
316: fixed i386 sigsetjmp (I mistyped the function name)
317: included sigjmp.c
318:
319: 0.5.5:
320: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
321: actually, it wasn't fork that wasn't working for sparc, it was pipe.
322: I fixed it now.
323: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
324: fixed readdir to use getdents and not the intel inline asm
325:
326: 0.5.4:
327: ported to sparclinux (sparc32 only). Beware: does not work yet.
328: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
329:
330: 0.5.3:
331: added tcsetattr and getenv to compile e3
332:
333: 0.5.2:
334: added vhangup, tcgetattr, isatty and memcmp for fgetty
335: (http://www.fefe.de/fgetty/)
336: added localtime from uC-libc.
337:
338: 0.5.1:
339: stat and friends actually work now. Yuck! Another case of
340: translation between kernel and userland. Why can't the kernel
341: people and the libc people simply agree on a standard?
342: removed many unnecessary includes to speed up compilation.
343: added -fomit-frame-pointer and i386 compilation target to reduce code size.
344: inlined socketcall to reduce code size.
345: "load" and "compile" are examples for djb code.
346:
347: 0.5:
348: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
349: each object file is now treated with "strip -x -R .note -R .comment"
350: split each system call into a separate object file
351: added ntohs, htons, alarm, if_indextoname and if_nametoindex
352:
353: 0.4.1:
354: oops, the strchr implementation was wrong. Thanks Jens Laas!
355:
356: 0.4:
357: copied opendir and friends from uC-libc.
358: added getservent and getservby* in gerservent.c
359:
360: 0.3:
361: remove readdir system call
362: added getdents system call
363: added getpwnam/getpwuid implementation in getpwnam.c
364: added a few string functions (in str*.c)
365:
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