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