1For version 0.16.*. 2 3> Sorry forgot to flip this back: perror and strerror are back to using 4 the /lib/liberror.txt file for all 8086 Elks modes. Only i386 has the 5 file linked. Elksemu now traps accesses to this file and substitutes 6 a fake. 7 8> Added vararg macros to new preprocessor. 9 10> Builtin CPP removed for __BCC__ compile, bcc-cc1 fit in 16bit but 11 crashes. Thirty two bit works fine, gcc or bcc. (almost any 32bit.) 12 13> Added __BCC_VERSION__ macro, defined by bcc.c contains hex version no. 14 15> Bugfix for offsets generated by #asm when using -O option to bcc-cc1. 16 Extra compile option ASM_USES_CALLEE_REGS. 17 18> Extra checking and bugfix for mixing char values with long shifts. 19 20> WARNING to distributions: I've altered the install scripts and paths 21 you will want to check them. Altered paths for bcc.c and normal 22 installs, defaults should now be good for distributions where bcc is a 23 cross compiler. If you set the PREFIX to / it'll install to suggested 24 Native paths. As86_encap moved to LIBDIR. 25 26> I've altered 'perror' and 'strerror' to be normal when compiled for 27 everything except libc_f.a. Only with that library will it look for the 28 liberror.txt file and it now looks in "/lib/liberror.txt" only. 29 This means there's no need to install it anywhere except ELKS itself. 30 31> Change -Mg option to use uclibc as glibc2 seems to have stopped working. 32 33> ar.c switch to using strerror. 34 35> Move elksemu, it's used like a shared library but is best treated like 36 an emulator so it's now installed in DISTBIN. Also on Linux-386 it's 37 compiled using the system compiler. 38 39> Use the POSIX -R argument to cp rather than the normal standard -r because 40 some new systems have decided to stop supporting their '-r' option. 41 42> Oops, the constant error strings in the assembler were char pointers not 43 char arrays, small waste of space. 44 45> Allow for Linux-2.6 32bit dev_t. 46 47> More changes so it compiles better on 'other' machines. 48 Removed some GNU-Make'isms in the top header file. 49 50> It seems that CYGWin's problem with _P is inherited from BSD. It also 51 seems most of my problems come from BSD recently, haven't they realised 52 that they down own the 'Unix Standard' anymore and haven't since SYSV 53 got popular. 54 55> Some changes for cygwin, it isn't quite as nasty as compiling for minix 56 but it doesn't miss by much! 57 58> Compiling for the 'tcc' complier, nice and easy. 59 60> Hitting bcc.c again, bcc-cpp now the default. 61 62> Some bugfixes for DEC Alpha -- 64 bit longs! 63 Constant folding still done with 64bit longs though. 64 65> The fopen function (and friends) is now a real function not a macro. 66 67> Ctype.h updated to ansi. 68 69> Libraries appear to compile properly with -O and -ansi now. 70 71> Copt's hash string table adjusted; should now have fewer pathological cases. 72 73> Order of copt's rule processing reversed; it now works from the top of a 74 rule file to the bottom. Also comment lines may be include in the match 75 lines. !BCC_EOS added to bcc-cc1 for 'end of statment'. 76 77> bcc-cc1's asm("") now works in declare mode too. 78 79> New independed cpp added, has both K&R and Ansi modes. 80 Changes made to the embedded cpp too to try and fix some bad bits. 81 82> Conditional assembler added around push and pop of 'si' and 'di' if the 83 optimiser (and as86's optimiser) are to be run. 84 85> Signed keyword added to bcc-cc1 for 'signed char' also works with other 86 int types but is usually just a noiseword. 87 88> As86 macro syntax altered, you now don't have to include any brackets. 89 90> Gcc warnings in ar86 cleaned up. 91 92> Mk_dist now makes incremental patch files too. 93 94> Update magic file. 95 96> Various updates to the bios libc, the vt52 and ansi emulations are 97 now seperated (and can be both included if needed) and don't have 98 to be linked. Conio functions work properly in bios and msdos. 99 100> Added -v (version) 101 102> as86 and ld86 now delete their binary outputs if there were errors. 103 104> Added more 'set' commands generated by '#asm' lines. The new ones begin 105 with '.' rather than '_' an are based off the 'bp' register rather than 106 the 'sp' register. 107 108> Various unused, test and old document files removed. 109 110> as86 modified to use normal malloc routines - no longer has limited 111 input file size. 112 113> as6809 repaired, appears to work. 114 115> as86 error display adjusted, some errors demoted to warnings. 116 117> Complete re-write of bcc.c driver program. Should now be easier to 118 modify, does have more versatility so that things that were formerly 119 compile time options are all run time. 120 121> #asm and #endasm now interact with statment processing inside functions. 122 If statments and case labels no longer need special layout however #asm 123 must be placed between statments now. 124 125> The __heap_top virtual constant added, allows the -H option to be used 126 with the -d option in the linker. 127 128> Conio routines added, merged with bios_getc/bios_putc routines which 129 now no longer exist under those names. 130 131> monitor.out now copes with very old zimages, like the memtest86 program, 132 and has 'Retry' prompt for disk errors. 133 134> msdos.s and tarboot.s loading of non-a.out executables adjusted for 135 dos BIN like files. 136 137> Standalone library startup adjusted to allow execution of a '-d' 138 executable from DOS, if __argr.x.cflag is set this is running under 139 DOS. 140 141> Compile for DOS again, disable cpm86 headers under DOS. 142 143> Minor bugfix for as86 binary output re sizeof(int)/K&R problem. 144 145For version 0.16.0. 146 147> As major bugs seem to be absent 0.16.0 is escaping. 148 149> Seperated the multi-pass optimisation from the jump extension. We now have 150 the -j back to it's old meaning and -O added to help shorten instructions. 151 152> Fix for nested conditionals in the assembler. 153 154> Fix for listing to unusual locations; assembler tried to list non-existant 155 lines. 156 157> Removed lots of warning from the ar86 code. (__STDC__ flags too) 158 159> Stop trying to strip scripts on install. 160 161> Remove non-working versions of malloc and stdio from libc directories. 162 163> Lots of changes in the 'bootblocks' example code. 164 165> Updated 'make distribution' to be all in the distribution. 166 167> bin86 Makefile adjusted so that the as86 script isn't installed with -s. 168 169For version 0.15.0. 170 171> Added support for archives to nm86/objdump86 and size86. 172 173> ar86 added. Used for Linux because RedHat is broken. 174 175> Bugfixes on utmpent and friends. 176 177> A bit more in the manpages on how to use the assembler etc. 178 179> Bug fixes in stdio, fp->mode cached too much, buffer type mixup. 180 181> Altered initial make variables, you only need to modify 'PREFIX=' to allow 182 installs into /usr/local. 183 184> The BIOS library has a simple MSDOS fs file reader now, based on the code 185 from monitor.out. 186 187> Added bin86-0.... source distribution archive. 188 189> Fixed bug in -t option to as/bcc (for moving the text segment) 190 191> Lines that have a unexpected character are now listed by the assembler 192 not just ignored. 193 194> Added assembly externals in as86_encap generated code. 195 196> I appear to have bcc generating a consistant set of code fragments for 197 floating point operations. No floating libs though ... 198 199> Lots of bootblocks changes including 200 Added lsys.com to install the dosfs boot sector under dos. 201 monitor.out now (finally!) loads zImage files. 202 Monitor.out now works with a TAR "filesystem" on a floppy. 203 Added two compile time options (-DTARFLOPPY and -DDOSFLOPPY) for smaller 204 executables to only boot linux-386 from a floppy. 205 Makeboot can install the mbr. 206 Removed the ELKS specific code from the minixfs loader, added a helper 207 program to load and relocate ELKS. 208 One config file for booting a [b]zImage. 209 DOSFS boot can boot any named file. 210 211> Fixed/avoided some problems with the optimiser breaking hand optimised code. 212 213> I've made some alterations to the header files in an effort to merge the 214 ELKS kernel files with fewer problems. 215 216> Oops, Claudio says that qsort went the wrong way, hmm. 217 218> Added some more library code for MSDOS programs, there's still more to go. 219 220> Removed the 'libc-8086' distribution tgz file. 221 222For version 0.14.0. 223 224> Objdump86 utility added, also includes nm86 and size86 that work on 225 as86's object files and elks executables. 226 227> Added ability to put ELKSSRC=/././. on initial make command line. 228 229> Some bug fixes and buffering improvements for stdio2. 230 231> Changed output of linker -m option to be more verbose (useful). 232 233> Linker errors are now directed to STDERR on unix/elks. 234 235> Alterations to elksemu and the C library to be closer to elks, 0.13.1+ 236 should not need a patch to work with 0.0.60+ ELKS. 237 238> Link symbol dump now flags local variables differently to exported. 239 240> Fixes for libc/misc/crypt.c, they do change the values of the encrypted 241 password so beware. 242 243> as86_encap now uses a static array and #defines. 244 245> Added -t <digit> flag to as86 and bcc to move the text segment 246 for this object into another one. 247 248> Moved segments 4..14 so that instead of being attached above the 249 data segment they now sit between the text and data segments in 250 the final a.out, this is where they'd be needed for medium model. 251 252> Added -x option to bcc to prevent it linking in crt0.o. 253 254> Added various improvemnts to the optimiser, I don't think it'll generate 255 illegal code now for "-O", "-O1", or "-Oi". The last inlines the functions 256 __get_es(), __seg_es(), __poke_es(), __peek_es() etc. 257 258> Code generator improvement for integer multiply and shifts. (Including 259 making it far less keen to do multiple shifts instead of a multiply. 260 261> Code generator fix to remove incorrect (but accepted by the assembler) 262 addressing modes like: mov ax,#_ar[bx] 263 264> Been messing with boot block stuff again, still can't get it to load 265 zImages (bzImages ok tho). Minix.c can't load an ELKS kernel either, 266 it's looking like there isn't actually enough room :-( 267 268> Fix to elksemu for breakages caused by glibc. 269 270> Other fixes to elksemu for execve(), dup(), readdir() etc functions. 271 272For version 0.13.0. 273 274> Removed too eager 'typeconv.c' warning. 275 276> Well, I just broken everything! To be exact if Dev86 sees a directory 277 called ${ELKSSRC:-/usr/src/elks}/include it'll assume that is the 278 equlivent of libc/kinclude and use that in preference. I've sent off 279 a patch so that elks-0.0.* should be compatible but meantime there 280 are bound to be lots of problems caused by shuffling of include files. 281 (Later: Actually doesn't seem too bad) 282 283> Added '-g' to gcc options, make sure install has '-s' to strip symbols. 284 285> Grrrr, missing files in bootblocks directory, I didn't have them all. 286 OK, as part of the dist script I'll have to do a 'make other' ... 287 Some other bits there too ... 288 289> Minor alteration to opening files in ld to fix problem when share.exe 290 loaded under dos. 291 292> Added Config.dflt for default libc configuration flags. I can now 293 re-introduce Joel's standard I/O functions ... but they haven't 294 been updated in a while ... 295 296> Addition to minix.c to use allow BB to determine the track size by 297 trial and error (not intuit from superblock) to allow mis-sized 298 filesystems on a floppy. Also add some error retries to the floppy 299 version. 300 301> Squeeze the minix BB a bit more, DOTS is now working again. 302 303> Can now do 'use16 8086' in assembler instead of 'use16 86' also 304 'use16 80386' 305 306> Add 'make install-ln', this installs _symbolic_links_ to the dev 307 directory in the normal directories. This means you don't have 308 to do a make install after re-compiling. But it also means the 309 'install' is dependent on the dev dirs. 310 311> Add ability to use overrides on the command line of the initial make, 312 and have them saved, for CC, CFLAGS, LDFLAGS, PREFIX, BINDIR and LIBDIR. 313 Includes minor alteration to bcc.c and as86_encap. 314 315> Added in 'objchop' as an option in the ld directory. 316 317> The cpu type warnings were worrying some people so I've set the 318 initial value of the '-w' flag to off, use -w- to turn them back on. 319 The -W flag to bcc now does this too. 320 321> Added the ELKS_SETUP from Ken Yap to minix.c. 322 323> Added __ELKS__, __8086__ and __i386__ #defines for relevent bcc configs. 324 325> Clarified some of the copyrights, esp for Bruce's stuff. 326 327> Added a few changes to clean up compiles on an AIX/RS6000. It still 328 needs gnu-make installed and is only tested with gcc though. 329 (Because of IBM's recent contribution to increasing the popularity of GCC) 330 331For version 0.12.0. 332 333> Notice the change in the version numbers, as long as I'm releasing the 334 upto the minute patches I thought I'd better give everyone a way of 335 keeping track. So now the 0.X.0 are the main releases, the 0.X.Y are 336 interim patches. 337 338> I've added a new output binary for ld86, it can now do the broken 339 relocatable a.out that bin86 produces. I don't like this but it 340 does let me move ld86 back to /usr/bin without breaking DOSEMU. 341 Note! If you've installed vsn 0.0.11 or earlier you will need to 342 uninstall it before installing this one. 343 344> Altered makefiles for GNU-make 3.74, GNU-make no longer generates 345 automatic 'rm' commands so I have to do it manually. 346 347> Altered makefiles again, starting to get non GNU makefile working. 348 349> Added some cleanups to ifdef.c. (voids etc) 350 351> Assembler now understands monadic '-' and '+' operations (for copt). 352 353> Improved the type conversion functions, they should now work on most 354 machines. There may still be some problems with sizeof(long) == 8 tho, 355 added some warnings/traps. 356 357> Improved the auto-detection and auto-rejection of <a.out.h> ld is more 358 likely to compile even if a.out.h is completely incompatible (leaving 359 out native support). 360 361> Fix for stdio, there was a problem if the OS only did a partial write. 362 363> Alter align() macros to use ssize_t iff both __STDC__ and _POSIX_SOURCE 364 are defined. 365 366> Add some changes for compiling under AIX. Assember and BCC appear to work, 367 ld has problems with AIX's 'ar' command - problem: AIX's make and gmake 368 won't like the smell of a standard following ar86 command ... hmmm. 369 370> Changes in bootblocks, minix.c can now be compiled for a hard disk (works 371 on dosemu, dunno about the real thing tho), fixes for mbr.s re preboot 372 facility. Addition to minix.c to fix number of sectors in bpb for floppy. 373 374For version 0.0.11. 375 376> New, most recent, version of unproto inserted. 377 378> AAARG! First_arg_in_ax breaks stdarg.h! As a consequence printf wasn't 379 working, now why didn't _you_ notice! OK. printf now uses varargs, that 380 is more likely to work and does for printf & scanf. 381 382> Added -Mc for 'caller saves' _without_ first_arg_in_ax. As this uses the 383 normal libc there are likely to be problems with library -> user callbacks. 384 385> Added -Ml for 386 'Large linux' compile. 386 387> Added -Mn for 'normal' elks compiles so the default for dos can be -Md 388 389> Brand new, an optimiser has been added, it's in its early stages yet 390 the 8086 (plain -O) version seems ok. The 386 generator (-O3) is definitly 391 missing some requirements. It's probably not a good idea to use -Ml and -O. 392 (Later: The 8086 can generate bad code it seems, oh well) 393 394> Some changes to the makefile, minix make will now _try_ to compile bcc, 395 it doesn't seem to succeed yet though. Also because of this I've gone 396 back over the headers, should be better on non-ansi or non-posix systems 397 now. BTW: minix make has no chance with compiling libc so I've added 398 another zip archive containing just the compiled libcs. 399 400> Add the -a-, -j-, -g-, -u- and -w- flags to as86; specifically for -w- 401 to allow easy enabling of assembler warnings while using bcc. 402 403> Bugfix for assembler 'ifc' pseudo op. 404 405> Bugfix for preprocessor and unterminated last line of included file. 406 407> Add minix syscall detector to elksemu, I may make it into an emulator ... 408 409> I've split of the 8086 ELKS and i386 Linux libc stuff into seperate 410 directories. I expect Chad will want to take over the 8086 one for a while. 411 Plus some other files moved around to help new users. 412 413For version 0.0.10. 414 415> Some serious changes to the makefiles, practically a rewrite of them. 416 'make', 'make all', 'make install', 'make clean' and 'make realclean' 417 do the expected things. 'make distribution' should let you create the 418 partial and binary dirtributions from the full source. 419 420> The makefiles now allow multiple libc binaries to co-exist. 421 422> The makefiles now allow a _full_ compile without installing anything. 423 424> In part because of the makefile changes a lot of files in the library 425 have been moved, this is a large portion of the patch size. 426 427> ifdef.c added as part of makefile changes, I'm not quite sure if I like 428 this way of doing things but it's ok for the mo. 429 430> MSDOS, in the output of *.bin files from as86 skipped areas have zeros 431 written not semi-random bytes. 432 433> MSDOS (+ other machines where sizeof(char*) != sizeof(int)) problem with 434 macros resolved, they appear to work correctly now. 435 436> NCC added, this is a different version of bcc with libs and include dirs 437 in the same format as the MSDOS driver. 438 This is used for 'uninstalled' compiling and also if you do: 439 $ ln -s `pwd`/bcc/ncc $HOME/bin/bcc 440 The bcc will use the 'uninstalled' include and library files for when you 441 don't have root access. 442 443> -H option added to ld86, this controls the size of the heap or 'chmem' 444 field in the executable. 445 446> BOOT-Blocks, makeboot can be compiled as a DOS COM, bootblock for msdos 447 filesystem completed, this will allow lilo, monitor.out or any Linux-86 448 standalone executable to be executed from an msdos floppy. Makeboot 449 can also install several other types of bootblock. 450 451> Monitor.out now includes 'bzimage' command, which will boot a Linux-i386 452 bzImage with command line and initrd. 453 454> 'skip.s' bootblock fixed. 455 456> A few more functions now work in 'standalone' mode, malloc() especially. 457 458-Rob 459 460For version 0.0.9. 461 462> The debian stuff has been removed again, Christoph want's to keep contol 463 of the debian specific files. 464 465> I've done some changes to the makefiles, it'll now honour CC=XXX on the 466 make command line. 467 468> The assembler now works again compiled under bcc, it tried to allocate 469 too much memory. 470 471> Major change to the assembler, '-j' not auto-sizes jumps this requires 472 a change to at least 3 passes. Sometimes it'll say it needs another -j 473 because lengthing jumps cause others to fail, two -j's will give it lots 474 of passes :-) 475 476> The second large change is an effort to identify when instructions are 477 not right for a specific processor and generate a warning. The use16 478 and use32 instructions now have an optional argument of a processor 479 type (86,186..686). Also bcc has a '-W' to remove the -w it passes to 480 the assembler. 481 482> Altered the way bcc deals with LOCALPREFIX, now under DOS it picks this 483 up based on the path to the executable. 484 485> Fixed a bug introduced by the 'cpp in asm' change in 0.0.8, bcc-cc1 486 wasn't compiling under bcc. 487 488> Two new bootblocks in the 'examples' mbr.s is an MBR (no really :-)) 489 msdos.s is unfinished but even this far allows lilo to be used on an 490 MSDOS filesystem floppy. 491 492> Changed ld to _check_ the magic on files inside an archive, this cures 493 the problem caused by long names inserted by gnu-ar. Also it notices 494 if an archive has been included in an archive and will link that too. 495 496> Changed ld to do a final check that it knows what sort of a.out.h file 497 it's got, if this fails '-N' is disabled. 498 499> Ld changed so for 16 bit exes the heap is limited to 32k. 500 501> getcwd and execvp added, sash should now work. Also added to the 386-lib 502 except execvp won't run scripts without '#!' 503 504> Nasty bug with syscalls of > 3 args in 386 code fixed, none of them would 505 have been working correctly. 506 507For version 0.0.8. 508 509> Christoph Lameter <clameter@debian.org> has provided a patch for 510 installation using the debian packaging, I've probably broken it :-) 511 512> Doselks has been added in, it's not that big really. 513 514> Triggered by the debian stuff the makefiles can now create a pure 515 binary installation tree, nothing needed in /usr/src. If kinclude is 516 configured out the include directory will reference /usr/src/linuxmt 517 518> Some good changes to the linker today, it will generate a Linux-386 519 (That's right, growed up linux) executable. It's still very fragile 520 but it does work. The '-r' option now works, but unlike bin86-0.3 521 it creates a _Linux_ OMAGIC file. This means that bcc -G works, the 522 names are mangled by ld86 such that if it was compiled with ELF the 523 OMAGIC will successfully link in an ELF environment. Beware older 524 versions of GCC-binutils can segfault in this situation. 525 526> Bit of sneakyness for the assembler, org will accept negative values ... 527 528> Made a few changes to idcc, I think I'll translate it to C soon. 529 530> Fixed a couple of problems with the preprocessor WRT hashes not at the 531 start of a line and quotes in ifdef'd out code. 532 533> Missed a bet in the kernel patch and module, the old one wouldn't 534 execute impure executables it will now. 535 536> Fixed matching bug in elksemu, A piece of code was commented out for 537 some reason ... oops. 538 539> Some of the error reporting in the linker has improved, if it can't 540 open libc it now says so! 541 542> Some 386 specific stuff has been added to libc, mainly the syscall 543 generator, startup stuff and BCC's 386 floating point code. 544 545> Change in malloc, Linux-386 limits +ve brk() changes to 32Mb, the malloc 546 will now allow for this ... Phew! grab.c will grab about 3Gb of virtual 547 memory, with 1Gb chunks, when compiled in 386 mode! One oddity, glibc 548 (quite an old one) hangs when trying to free if grab.c is compiled static. 549 550> Hunted down the most important 16 bit dependancies in dis88, it seems to 551 generate a reasonable output file now. Plus a couple of fiddles in the 552 disassembler, personally I prefer Hex and I've added a couple of markers 553 for 386 code (use opr32, use adr32, seg fs/gs) and the -f flag to force 554 disassembly of any file. 555 556> The i386 compile uncovered a bug in alloca, In fact the move to 386 has 557 been amazingly painless, practically everything so far has worked first 558 time or nearly so ... Wow! 559 560> Added minimal dirent to i386-lib, elksemu now compiles under BCC-386 561 AND WORKS! 562 563> Trying to compile bash, it does some hackish stuff with the preprocessor 564 and uncovered a couple of problems, fixed. Now I need more float stuff. 565 566> Added for bcc-cc1, code between #asm and #endasm _is_ scanned for #defined 567 words and functions, it didn't effect the libc at all. Of course we now 568 need some way to put multiple instructions in one #define, I've nominated 569 '^' as the statement terminator, I didn't have many choices :-( 570 571> Added '-t' for bcc-cc1 when bcc gets -S 572 573-Rob 574 575For version 0.0.7. 576 577I've been making quite a few changes to the assembler: 578 The 'include' or 'get' command now works. 579 The '-b' and '-s' options are now quite useful for bootblocks 580 or encapsulated code. 581 The standard input is now a valid source for the assemble 582 (but only on 'big' machines). 583 Various other functions now work, macros, 'jmp near', 584 'jmpi qword $100000,$1000', and other bug fixes. 585 As86_encap script added. 586 Some of the 256 char line limits have been removed for non-bcc compiles. 587 588The linker will now fail more gracefully for reversed 'org's and complain 589about too large segments. 590 591Bcc-cc1 will now compile under itself, with some limitations, and appears 592to generate correct output. There are problems tho in that I think the 593heap<->stack saftey margin is too short and I've disconnected all code for 594floating point features. 595 596The components will all compile and seem to work quite well using MSC 5.1 597under dos and will probably compile using other dos compilers. BCC cannot 598compile itself under dos because the libs to fake the unix syscalls under 599dos are currently too large. 600 601A number of fixes have been added that were apperently in another version 602of the tools to aid operation on other machines, there's now a better chance 603of these programs working on 'big-endian' machines. 604 605Various bits and pieces have been added to the libs, including some time 606functions (but these need a _small_ way of dealing with "DST"). 607 608-Rob 609