Annotation of dietlibc/CHANGES, revision 1.165
1.164 fefe 1: 0.12:
2: more contributions from Frank Klemm.
1.165 ! fefe 3: iconv can now do UCS-2, too.
1.164 fefe 4:
1.115 fefe 5: 0.11:
6: fix major oops in DNS routines (only with WANT_FULL_RESOLV_CONF enabled).
1.116 fefe 7: fix vsscanf bug (Thanks, David Chappell).
1.117 fefe 8: add floor, ceil and memchr prototypes.
9: add __builtin_expect and expect #defines for gcc versions below 3.0
1.118 fefe 10: cleaner errno vs __errno_location handling
11: add placeholder iconv (iconv_open will always return EINVAL)
12: try to remove kernel 2.4 header dependency in IPv6 sockaddr_in6
13: initialization of getaddrinfo.
1.119 fefe 14: fix vsnprintf %X (printed lower case)
1.120 fefe 15: I wrote a new getopt. It appears to actually work (it is POSIX
16: compliant, it does not sort argv like the GNU version) and is only
17: a little over 300 bytes on x86.
1.121 fefe 18: Guillaume Cottenceau just wrote me that strncat should be even more
19: broken than it already is: it should append n bytes AND THEN \0!
20: I wonder how many programmers have produces off-by-one errors here...
1.122 fefe 21: Fix regexec offset return. autoconf now believes that diet libc has
22: POSIX regular expressions.
1.123 fefe 23: Fix fnmatch (a/b/* matched a/b/c/d even if FNM_PATHNAME was set)
1.124 fefe 24: Fix regular expression match for x* when there is no x at all.
1.125 fefe 25: Fix memory leak in error case in gethostbyname(2|). Thanks, Dietz Pröpper.
1.126 fefe 26: Add %h to vsnprintf.
1.127 fefe 27: Add FAQ.
1.128 fefe 28: Make %h work for signed numbers and add %hh to vsnprintf.
29: initgroups ignored the group argument :-(
30: remove printf references and nested functions from glob.
1.129 fefe 31: added an errno in libpthread that will display a prominent linker
32: warning.
1.131 fefe 33: started getting rid of kernel headers. Big task! :-(
1.130 fefe 34: add res_mkquery. The diet libc can now compile and link mtr.
1.132 olaf 35: Olaf: added a lot of code in libdl (not yet complete), changed the
36: startup code to make it work with his libdl and ld.so (needs still work
37: too)
1.134 fefe 38: __dns_readstartfiles only took the first domain or search path.
39: Thanks, Anthony de Boer
1.133 olaf 40: Olaf: added clone and a new unified_syscall for PowerPC
41: also dynlinker is now available (i386 only at this time)
1.135 fefe 42: crufted together a stdarg.h implementation from the various gcc headers.
1.136 fefe 43: implement getopt_long (ugh, the GNU people need professional help)
1.137 fefe 44: fixed word delimiters in regex (they looked for space, i.e. "," did
45: not work as delimiter)
1.138 fefe 46: errno.h now declares sys_errlist and sys_nerr.
1.143 fefe 47: added mkdtemp.
1.142 fefe 48: Uwe Ohse reported all of the following bugs:
49: ttyname should return 0 if !isatty.
50: realpath returns NULL if "." cannot be opened
51: putenv erroneously accepted (and mishandled) entries without "=".
52: popen returned 255 instead of 127 if /bin/sh could not be run.
53: fgetc did not set the internal EOF indicator on EOF.
54: bsearch contained an assumption about integer arithmetic overflow
55: behavior.
56: system did not set SIGCHLD and thus contained a race.
57: popen did not set close-on-exec and could leak an fd on malloc error.
1.147 fefe 58: daemon did not check whether open returns an fd below 3
59: perror did not save errno.
1.144 olaf 60: Olaf: Peter Jones reported some problems with perror; strerror had the
61: same problem.
62: Peter also posted a patch to atexit/exit. With some modifications it is
63: now implemented.
1.145 fefe 64: Unbuffered stdio and ungetc can no longer be disabled. I will try to
65: implement part of it using ELF weak symbols.
1.146 fefe 66: Added minimal sysconf (tehe) from David Chappell.
1.148 fefe 67: Added overflow handling for strtoul and strtol.
1.149 fefe 68: Added WANT_ETC_HOSTS in dietfeatures.h and made gethostbyname/2 use
69: it before falling back to DNS if enabled.
1.150 fefe 70: Added a littie backwards compatibility cruft for gpm (man, do these
71: sources stink!)
1.151 fefe 72: Added openpty.
1.152 fefe 73: Squeeze a few bytes off the is* routines, courtesy of Peter Jones.
1.154 fefe 74: Fix fseek return value.
1.155 fefe 75: Add dirname and basename.
1.156 fefe 76: Add a few i386 math routines contributed by Frank Klemm.
1.157 fefe 77: Fixed getservent (did not allow _ and - in the aliases).
78: Thanks, Oden Eriksson
1.158 fefe 79: Added a float.h so configure believes we have ANSI header files.
80: Fix a lot more stdio bugs that Uwe Ohse pointed out.
1.162 fefe 81: Olaf: has added a new scanf and printf core that is suitable for all
1.159 olaf 82: scanf and printf function implementations
1.160 fefe 83: Imported a few more functions and optimizations from Frank Klemm (he
84: also rewrote dtostr to have more precision)
1.161 olaf 85: Olaf: checked in a new sig* function family (based on rt_sig*).
86: legacy <2.2 signal-handling doesn't work at the moment.
1.163 fefe 87: Made rudimentary iconv that can convert back and forth between
88: iso-8859-1, utf-8 and ucs-4 (for debugging).
89: Thanks to Markus Kuhn for the excellent utf-8(7)!
1.115 fefe 90:
1.74 fefe 91: 0.10:
92: update getpagesize.
93: add personality.
1.75 fefe 94: add "%*s" and "%*.*s" support to vsnprintf.
1.76 fefe 95: add putchar (apparently arm-linux-gcc will substitute printf("\n")
96: with putchar('\n') behind your back...?!
1.77 fefe 97: import include/scsi/ from glibc.
1.78 fefe 98: add iopl.
1.80 fefe 99: add execl and sigdelset prototypes.
100: add getopt_long stuff to getopt.h (may compile but won't link).
1.81 fefe 101: add RPC headers (no code yet).
1.82 fefe 102: add mlockall, munlockall
1.83 fefe 103: make "diet gcc foo.c" work.
104: added Sun RPC code and removed as many warnings as possible in a
105: heroic act of self-mutilation.
106: added getproto* and getdtablesize for the RPC cruft :-(
1.84 fefe 107: added getpass. mount from util-linux actually compiles now!
108: fix the sig*set routines. mount actually works now *bg*
109: fix fwrite dividing by zero when trying to fwrite n records of size 0.
1.85 fefe 110: added an initial regex implementation (3500 bytes!!!).
1.87 fefe 111: add llseek and lseek64 with optional lseek fall-back.
1.88 fefe 112: add res_init.
113: add asprintf (ugh, what an ugly function).
1.89 fefe 114: expanded arpa/nameser.h to include backwards compatibility defines
1.90 fefe 115: add ut_name alias to ut_host in struct utmp.
116: add inet_ntop, inet_pton, gethostbyname2.
1.92 fefe 117: add sysinfo, recvmsg, sendmsg.
1.93 fefe 118: add endmntent, getmntent, setmntent.
1.94 fefe 119: fix fnmatch (thanks, Guillaume Cottenceau!)
1.96 fefe 120: add setenv.
121: remove __restrict from mntent.h, add __restrict__ removal alias for
122: older gcc versions in sys/cdefs.h.
123: add rlim_t, sig_atomic_t declarations.
124: add sigsetjmp #define for __sigsetjmp (oops).
125: (Thanks to Chris Siebenmann for these three bug reports)
1.97 fefe 126: add a gruesome hack to printf floating point to accept %f and kludge
127: together support for %.2f. Don't look at the code, please!
1.98 fefe 128: fixed tcsetpgrp (oops, this is embarassing! Thanks, Chris Siebenmann)
1.99 fefe 129: imported fix for entlib by Jeff Garzik.
1.100 fefe 130: add glob implementation from Guillaume Cottenceau (Thanks!!)
131: add libdl fragments from Olaf (Yeah! One step closer to dynamic linking!)
1.101 fefe 132: add REG_ICASE and word start/end handling to my regular expressions.
133: my regular expressions now actually match substrings (i.e. "foobar" to "bar").
1.102 fefe 134: wrap getcwd to comply to man page (the syscall returns the number of
135: bytes, not the buffer)
136: add realpath.
1.103 fefe 137: fix vfprintf.
1.104 fefe 138: fix *scanf %s zero termination.
139: add abs, labs, llabs.
1.105 fefe 140: add <sys/io.h>, ioperm syscall.
141: add flock to <sys/file.h>
1.106 fefe 142: fixes to bsearch and the regular expressions.
1.107 fefe 143: add fake herror.
1.108 fefe 144: add scandir and alphasort.
1.109 fefe 145: add killpg
1.110 fefe 146: implemented a gross hack to make libpthread compile when
147: dietfeatures.h does not define WANT_THREAD_SAFE (it's empty then).
1.111 fefe 148: add getaddrinfo and freeaddrinfo (man, what a fucked up interface!)
1.112 fefe 149: fix sigsuspend (syscall had completely fscked up arguments!)
1.113 fefe 150: RLIM_INFINITY from the kernel is broken. Thanks to Chris Siebenmann
151: for sending a patch.
1.114 fefe 152: add getserv*.
153: add WANT_FULL_RESOLV_CONF so that the DNS routines use "domain" and
154: "search" from resolv.conf.
1.74 fefe 155:
1.73 fefe 156: 0.9:
1.65 fefe 157: fixed initgroups (oops)
1.66 fefe 158: Cleanup appending file open for stdio (thanks, James Antill)
159: imported vfprintf fix from James Antill.
1.67 fefe 160: add fnmatch
161: change index, rindex and bcmp as weak ELF symbols (were #defined before)
1.68 fefe 162: Olaf added character classes to *scanf.
1.69 fefe 163: Put object and library files into a separate directory (bin-$ARCH).
164: Add "cross" make target to make all architectures.
165: Add "diet" program and man page.
1.70 fefe 166: Add getgrnam, getgrgid
1.71 fefe 167: Add cfmakeraw (Thanks, Antonio Musumeci)
1.72 fefe 168: localtime won't call gettimeofday when the tzfile parser is used.
1.65 fefe 169:
1.64 fefe 170: 0.8:
1.34 fefe 171: vsnprintf(0,...) estimated the length of strings with a padding width
172: incorrectly.
1.35 fefe 173: new reboot() from Olaf.
1.36 fefe 174: added prototypes for getsockopt and setsockopt.
1.39 fefe 175: added experimental sem* and shm*
1.38 fefe 176: define EXIT_SUCCESS and EXIT_FAILURE
1.40 fefe 177: added setvbuf (only changes mode, not buffer)
1.41 fefe 178: added dietwarning.h (woohoo, linker warnings!) and used it to warn of
179: insecurity (system, sprintf) or bloat (printf and stdio).
1.42 fefe 180: added qsort() and bsearch(). Benchmark on 1000 random ints:
181: glibc: 679414 cycles qsort and 3352 cycles bsearch
182: diet libc: 300010 cycles qsort, 553 cycles bsearch
183: I have no idea why glibc is so slow.
1.43 fefe 184: added __isnan (references by libm.a from glibc).
185: added popen() and pclose(). Now the diet libc can link slsh (from
186: S-Lang!)
1.44 fefe 187: corrected usleep. It was more of an msleep until now.
1.45 fefe 188: corrected __dtostr (it looped when trying to format "0.0").
189: several fixes to stdio (thanks to S-Lang's excellent test suite!)
1.46 fefe 190: added ungetc (does it work?)
1.47 fefe 191: added inet_aton (yuck!)
1.50 fefe 192: added gethostbyname, gethostbyaddr, gethostbyname_r and gethostbyaddr_r
1.48 fefe 193: added h_errno and __h_errno_location
194: added inet_ntoa
1.49 fefe 195: added setpgrp and getpgrp, strsignal and execv (thanks, Olaf)
1.51 fefe 196: add bcopy, index, rindex macros
197: add isgraph and isxdigit
1.52 fefe 198: add strftime (ugh!!!)
1.53 olaf 199: Olaf fixed strftime, gmtime_r leap year bug.
1.54 fefe 200: Jeff Garzik contributed a spec file. I put it in contrib and hope
201: everbody knows what to do with it...
202: Olaf checked in a ton of libpthread stuff.
1.55 fefe 203: added mkstemp using /dev/urandom (harder to guess than getpid()).
1.56 fefe 204: add large file backwards compatibility support (so gzip will run on
205: kernel 2.2 and 2.0)
1.57 fefe 206: added shutdown
1.58 fefe 207: added nice
208: added pseudo-locale support for is* (they are now weak aliases,
209: isupper -> __isupper_ascii etc). So, for example, liblatin1 can
210: overwrite the default is* functions.
1.59 fefe 211: added liblatin1.a
1.60 fefe 212: added tzfile implementation (does it work for anyone else?)
1.61 fefe 213: added syslog(3) (thanks to Rene Müller!)
1.62 fefe 214: Jeff Garzik contributed getgr*, getpw* and getsp* in one tiny package.
215: Thanks!
1.63 fefe 216: merged duplicate code in execv and execvp into exec_lib.o
1.34 fefe 217:
1.21 fefe 218: 0.7.2:
219: added several prototypes to already implemented functions and
220: <sys/reboot.h>. Thanks for Abraham for pointing this out.
1.22 fefe 221: added prototypes for process group and dup syscalls. Thanks to
222: Abraham again. He also contributed an implementation for daemon(),
223: an ugly BSD hack. I decided to diversify the lib/ directory a
224: little and now created a libugly/ directory for stuff like system()
225: and daemon() ;-)
226: added libstdio and moved all that stdio crap from lib/ there. The
227: idea is to start separating now what we will separate for shared
228: libraries anyway.
1.26 fefe 229: optimized x86 unified-syscall by Olaf.
1.27 fefe 230: added limits.h, removed __ARCHBITS from endian.h (use __WORDSIZE from
231: limits.h instead)
232: added remove.c and enough cruft to limits.h to make it compile lzo,
233: lzop and bzip2.
1.28 fefe 234: added mktime, asctime_r, asctime and ctime (needed for gzip).
235: Someone will need to implement a reader for the glibc localtime file
1.31 fefe 236: format some day (man tzfile, ugh!) :-(
1.29 fefe 237: added unlink prototype to unistd.h.
238: added gmtime and gmtime_r.
1.31 fefe 239: fixed sparc unified syscall error handling (please upgrade!).
1.30 fefe 240: removed readdir glibc compatibility cruft.
1.31 fefe 241: removed stat glibc compatibility cruft.
1.32 fefe 242: oops, my fread was broken for pipes.
1.33 fefe 243: Olaf found a bug in pipe() for sparc, too.
1.21 fefe 244:
1.9 fefe 245: 0.7.1:
1.11 fefe 246: optimized away the static arrays from __ltostr and __lltostr.
247: optimized away the static arrays (and more!) from strtoul and strtoull.
248: added system (by Olaf).
1.12 fefe 249: added tolower and toupper
1.13 fefe 250: added getopt from Olaf (~600 bytes on x86!)
1.14 fefe 251: added clone for mips (by Olaf).
252: fixed longjmp and setjmp on sparc not to require glibc include files.
1.15 olaf 253: added pause for all (by Olaf).
1.17 fefe 254: added __attribute__ ((__const__)) to ctype.h
1.16 fefe 255: added isupper and islower.
256: added putc and putchar as macros.
1.17 fefe 257: added strcasecmp and strncasecmp (thanks to Abraham vd Merwe for
258: insightful discussions and patches I partially used for the last three)
1.18 fefe 259: added getpriority and setpriority (also by Abraham)
1.19 fefe 260: oops, I broke strtoul in a recent optimization attempt.
1.20 fefe 261: oi, setjmp and longjmp were broken on other platforms, too!
262: Thanks to Sébastien Côté for reporting this.
1.9 fefe 263:
264: 0.7:
1.6 olaf 265: clone support for i386,alpha,arm and sparc by Olaf.
1.1 cvs 266: Initial dynamic loading glue for i386, also by Olaf.
267: We don't have a dynamic loader yet, so this is not yet usable.
268: added readv, sigdelset, sigaltstack, sigfillset, sigismember, usleep,
269: vsprintf, writev, all by Olaf.
1.2 fefe 270: imported readdir fix from Guillaume. Mhh, can the kernel interface
271: really be this broken?
1.3 fefe 272: Found a kludgy way to detect whether the kernel includes define struct
273: stat64 (they also define STAT64_HAS_BROKEN_ST_INO). If this does
274: not work for you, please tell me!
1.4 fefe 275: Removed bogus __seek_types enum, it's a bunch of #defines now.
1.7 fefe 276: Fixed stdio line buffering. The code was already there but I forgot
277: to mark stdio and stdout as line buffered. This should really be
278: done dynamically using isatty, though.
1.8 fefe 279: Removed superfluous "if (1)" in execvp.c
1.1 cvs 280:
281: 0.6.14:
282: *scanf did not append the 0 byte for %s.
283: added creat and changed creat to call open directly instead of open64.
284: did for fread what 0.6.10 did for fwrite.
285: repaired buffered stdio a little (line buffering is still not
286: supported).
287: [All of these bugs have been reported by Guillaume. Thanks!]
288: added __pure__ to strchr and strrchr in <string.h>
289:
290: 0.6.13:
291: included COPYING to make clear that the diet libc is covered by the
292: GNU General Public License (and _not_ the LGPL). That means that
293: you need to obtain a license from me if you want to use the diet
294: libc in a proprietary program that you want to distribute.
295: The x86 unified syscall swapped arguments #4 and #5 and noone
296: noticed until now! Thanks to Guillaume Cottenceau for reporting
297: this!
298: The malloc had a subtle bug with small allocations that could cause
299: segfault. Guillaume reported it, Olaf fixed it.
300:
301: 0.6.12:
302: added assert, statfs and fstatfs
303: added include/net/if.h so fget compiles again.
304:
305: 0.6.11:
306: added putenv.
307:
308: 0.6.10:
309: fixed fwrite. It returned the number of bytes written, not the number
310: of records. Thanks to Albert D. Cahalan for pointing this out.
311: fixed fgets. It returned EOF on empty lines. Thanks, Erik Frey.
312: added brk and sbrk. harold@nb.com.sg made me do it.
313:
314: 0.6.9:
315: fixed execvp not to return on ENOENT
316: did for {open|read|close|seek|tell}dir what I did for stat before.
317: The glibc compatibility part is currently non-functional.
318: fixed white space handling in sscanf " (" would not match " (".
319: fixed printf to accept 'l' flag.
320: fixed getpwuid (ignored last line)
321:
322: 0.6.8:
323: Olaf contributed initial thread-safe syscalls for i386, alpha, sparc,
324: mips and arm. I did the one for ppc. They can be enabled in dietfeatures.h.
325: added strlcpy and strlcat from OpenBSD.
326: added stat64, fstat64 and lstat64.
327: added endian.h and made ending of strlen.c endianness-aware
328: added string routines size tweak to dietfeatures.h. Most of the
329: string routines have been unrolled. This is up to three times as
330: fast but creates up to three times larger code. Now you can disable
331: the unrolling.
332: added sendfile.
333: I also added pread. It works on x86 and sparc but not on ppc and mips.
334: I have no idea what's going on. strace disagrees with the kernel.
335: Can anyone help? I asked the Linux kernel mailing list for help, too.
336: added a few aliases of the type __libc_open for open. nm on
337: libpthreads.so indicates that we will need them.
338:
339: 0.6.7:
340: the sources now compile without warnings with -Wall.
341: printf now prints "(null)" when %s is passed NULL. This can be
342: removed with WANT_NULL_PRINTF in dietfeatures.h
343: added vfprintf, execl, ttyname.
344: stat, lstat and fstat are now #defined to __dietstat, __dietlstat and
345: __dietfstat so they can use the normal kernel struct stat.
346: stat, lstat and fstat are now C wrappers that convert to the glibc
347: struct stat. So we can avoid that overhead for programs that use
348: dietlibc headers.
349:
350: 0.6.6:
351: changed the Makefiles so you can now set CFLAGS on the command line
352: added memccmp (analogous to memccpy) and strncmp.
353: Olaf fixed another bug in the sparc unified syscall.
354: Paul Clifford contributed a C version of his strlen.S that is much
355: more efficient than the previous strlen on all platforms! It also
356: looks like technology from Roswell. ;-}
357: added a "real" stdio. Well, almost. Please contribute!
358: added dietfeatures.h so you can remove features you don't need.
359: removed debug code from vsnprintf that changed \0 to ' ' (argh!).
360: stdio now works with simple programs and minigzip from libz.
361: stdio uses some major trickery to avoid linking the stdio, stderr and
362: stdout (and reserving space for them) when they are not used.
363:
364: 0.6.5:
365: Red Plait <redplait@ixcelerator.com> found several bugs in diet libc,
366: most of them bugs in the new header files, but also missing sigset
367: functions.
368: Paul Clifford contributed an assembly strlen.S for ARM and fixed
369: several bugs.
370: Fixed ppc/setjmp and mips/pipe.
371: Olaf contributed a new sparc unified syscall.
372:
373: 0.6.4:
374: declared is* static inline in getservent.
375: added assert_fail, strtoul, isalpha, isdigit, isalnum, isascii.
376: changed strlen to return 0 when passed NULL.
377: new, much smaller unified syscall for MIPS. Thanks to Olaf the Mad
378: Scientist who actually implemented this without access to a MIPS
379: box, just from reading the architecture manual. And it worked out
380: of the box.
381: started a set of system includes, mainly so that I can use lcc and
382: my alpha-linux cross compiler (which is unable to cross-compile
383: glibc). diet libc can now be compiled without any include files
384: from a normal libc. The includes do declare more than diet libc
385: currently delivers and they are still far from complete for real
386: applications.
387: I will only add assembly versions that are smaller _and_ faster than
388: the C version. Larger routines are only accepted if they are called
389: very often and are substantially faster.
390: added i386 assembly strchr, which is smaller and faster than the old
391: version. It is, however, larger than the version contributed by
392: proton (thanks, anyway).
393: added i386 strlen (31% faster, 14% smaller)
394: "make t" will now create a map file called "mapfile".
395:
396: 0.6.3:
397: added sys_errlist, strerror and perror
398: added isblank
399: added atol
400:
401: 0.6.2:
402: mmap for ARM didn't compile. Thanks, Paul!
403:
404: 0.6.1:
405: split mmap into the architecture specific subdirectories.
406: getenv now copes with environ==NULL, thanks Paul Clifford.
407: Paul also contributed a smaller ARM startup code.
408:
409: 0.6:
410: strcat returned the wrong result. Thanks, Dietz Pröpper.
411: strtod now understands a negative exponent (oops, thanks Bertram Barth)
412: Port to arm-linux-gnu, but on the Netwinder I use for testing the
413: __dtostr does not work (I have no idea why!)
414: The MIPS port now uses (much smaller) non-PIC code. That means that
415: the applications you link against diet libc also have to be compiled
416: non-PIC. I suggest copying the CFLAGS from the diet libc Makefile.
417: Thanks to Ralf Bächle for helping me with this!
418: I made subdirectories for the architectures and use VPATH to override
419: VPATH so that make finds the source file automatically. That should
420: simplify the sources greatly.
421: Olaf Dreesen contributed Alpha support including setjmp and longjmp!
422: ARM and MIPS now also have setjmp and longjmp
423: "compile" and "load" are now make targets. Use them for djb programs.
424: added contrib/elftrunc.c which will remove unnecessary ELF headers.
425: Again, contributed from Olaf. Great work!
426:
427: 0.5.12:
428: printf also does signed numbers.
429: If you don't use atexit, dietlibc now does not link exit, only _exit.
430: *printf now correctly returns the number of bytes written.
431: Olaf contributed experimental sscanf and vsscanf implementations.
432: If passed NULL as buffer, snprintf will not write anything but still
433: return the number of bytes it would have written.
434: Initial MIPS port! (Oh, the agony!)
435: No setjmp and longjmp support yet! Please contribute!
436: I even implemented unified syscalls for MIPS. Still, MIPS code is
437: almost twice the size of SPARC code. If anyone knows why: please
438: tell me!
439:
440: 0.5.11:
441: I implemented new unified syscalls for x86, sparc and ppc, this time based
442: on .s files and not .c files, and I moved the syscalls into
443: subdirectores to clean the dietlibc sources up a little.
444: A binary consisting of printf("%s is %d\n","olaf",23) is now
445: 2864 bytes on sparc
446: 2488 bytes on intel
447: I kludgily implemented fprintf(stdout,... and fprintf(stderr,...
448: to make a few more applications work.
449: Olaf Dreesen also implemented some unified syscall stuff for x86.
450: He discovered that with our unified syscall interface it actually
451: costs <10 bytes total to make all system calls thread safe!
452: I implemented atexit() (can register up to 4 callbacks).
453: I implemented strtod and __dtostr (the opposite). Now we can add
454: floating point support to vsnprintf and sscanf!
455:
456: 0.5.10:
457: I actually saw that I can not only merge the errno handling code of
458: the system calls on x86, I can also merge the rest (including the
459: arguments) except for setting the system call number. All those
460: system calls are now just a jump to a unified system call handler.
461: I got rid of x86openclose again. The savings are substantial:
462: chown from embutils went from 7664 to 7184 bytes!
463: If I'd move the system call wrappers to assembly language, I could
464: even reduce the alignment (does not matter since it's just a jump
465: anyway) and get rid of the "ret" behind each jump (one byte per
466: system call!)
467:
468: 0.5.9:
469: added memchr, strpbrk, strstr, strtol, isspace (hehe)
470: fixed strdup
471: fixed return values for strcpy and strcat (thanks to Norbert Berzen)
472: Olaf Dreesen contributed a strtol and initial {sn|vsn|}printf implementation
473: (no signed integers, only strings and unsigned integers (but
474: supporting octal, hex and decimal). Thanks, Olaf! (by the way:
475: that code must be wonderful, I don't understand it at all *bg*)
476: Olaf's printf does understand padding like in "%08d" and "%8d" and
477: automatically pads pointers with '0'.
478: Rewrote the x86 start code, old: 22 instructions, new: 12 instructions.
479: Thanks to proton for inspiration on this.
480: The new x86 start code also does not reference exit any more, thus saving
481: 64 bytes for executables that don't call exit explicitly.
482: [insert maniacal laughter] EVERY BYTE COUNTS!1!! ;-)
483: Moved errno and environ to start.S, saving no byte binary size but
484: speeding up compilation and slightly shortening dietlibc.a ;-)
485: For x86: joined open and close into one assembler file, sharing the
486: errno handling. This is a feasibility test and it actually saves a
487: few bytes. I think I will reimplement the _syscall[1-6] macros on
488: all platforms now to share the errno handling code for them.
489:
490: 0.5.8:
491: fixed strchr to be able to look for 0.
492:
493: added _llseek, ftruncate, getpgid, getresgid, getresuid, getsid,
494: memccpy, memmove, mprotect, setregid, setresgid, setresuid, setreuid,
495: strncpy, swapon, truncate, strtok, strtok_r, strspn, strcspn (all
496: contributed by Olaf Dreesen)
497:
498: added execvp, getcwd
499:
500: fixed __xmknod
501:
502: Note: can it be that the ftw interface really is so broken that I
503: cannot implement it without having to implement some searching data
504: structure? I included an experimental ftw implementation that will
505: not follow symlinks.
506:
507: 0.5.7:
508: oops, if_nametoindex was broken!
509:
510: 0.5.6:
511: ported to ppc-linux.
512: fixed i386 sigsetjmp (I mistyped the function name)
513: included sigjmp.c
514:
515: 0.5.5:
516: added wait, sys_siglist, longjmp/setjmp/sigsetjmp for i386 and sparc
517: actually, it wasn't fork that wasn't working for sparc, it was pipe.
518: I fixed it now.
519: dietlibc/SPARC assumes -msupersparc (does not provide div, mul, etc)
520: fixed readdir to use getdents and not the intel inline asm
521:
522: 0.5.4:
523: ported to sparclinux (sparc32 only). Beware: does not work yet.
524: added raise, abort, readlink, strcat, geteuid, geteuid, wait3, access
525:
526: 0.5.3:
527: added tcsetattr and getenv to compile e3
528:
529: 0.5.2:
530: added vhangup, tcgetattr, isatty and memcmp for fgetty
531: (http://www.fefe.de/fgetty/)
532: added localtime from uC-libc.
533:
534: 0.5.1:
535: stat and friends actually work now. Yuck! Another case of
536: translation between kernel and userland. Why can't the kernel
537: people and the libc people simply agree on a standard?
538: removed many unnecessary includes to speed up compilation.
539: added -fomit-frame-pointer and i386 compilation target to reduce code size.
540: inlined socketcall to reduce code size.
541: "load" and "compile" are examples for djb code.
542:
543: 0.5:
544: Olaf Dreesen contributed a much smaller implementation of malloc and friends.
545: each object file is now treated with "strip -x -R .note -R .comment"
546: split each system call into a separate object file
547: added ntohs, htons, alarm, if_indextoname and if_nametoindex
548:
549: 0.4.1:
550: oops, the strchr implementation was wrong. Thanks Jens Laas!
551:
552: 0.4:
553: copied opendir and friends from uC-libc.
554: added getservent and getservby* in gerservent.c
555:
556: 0.3:
557: remove readdir system call
558: added getdents system call
559: added getpwnam/getpwuid implementation in getpwnam.c
560: added a few string functions (in str*.c)
561:
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