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