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