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