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