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