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