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