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