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