3 * Added c99 data-type compliance.
4 * Added general x86-64 support.
5 * Added win64 (x86-64 COFF) output format.
6 * Added __BITS__ standard macro.
7 * Renamed the elf output format to elf32 for clarity.
8 * Added elf64 and macho (MacOS X) output formats.
9 * Added Numeric constants in DQ directive.
10 * Added oword, do and reso pseudo operands.
11 * Added 8-bit floating-point format.
12 * Correct the generation of floating-point constants.
13 * Added Floating-point option control.
14 * Added Infinity and NaN floating point support.
15 * Added ELF Symbol Visibility support.
16 * Added Setting OSABI value in ELF header directive.
17 * Added Generate Makefile Dependencies option.
18 * Added Unlimited Optimization Passes option.
19 * Added %IFN and %ELIFN support.
20 * Added Logical Negation Operator.
21 * Enhanced Stack Relative Preprocessor Directives.
22 * Enhanced ELF Debug Formats.
23 * Enhanced Send Errors to a File option.
24 * Added SSSE3, SSE4.1, SSE4.2, SSE5 support.
25 * Added a large number of additional instructions.
26 * Significant performance improvements.
31 * fix outas86's .bss handling
32 * "make spotless" no longer deletes config.h.in.
33 * %(el)if(n)idn insensitivity to string quotes difference (#809300).
34 * (nasm.c) __OUTPUT_FORMAT__ changed to string value instead of symbol.
38 * Add Makefile for 16-bit DOS binaries under OpenWatcom, and modify
39 mkdep.pl to be able to generate completely pathless dependencies, as
40 required by OpenWatcom wmake (it supports path searches, but not
42 * Fix the STR instruction.
43 * Fix the ELF output format, which was broken under certain
44 circumstances due to the addition of stabs support.
45 * Quick-fix Borland format debug-info for -f obj
46 * Fix for %rep with no arguments (#560568)
47 * Fix concatenation of preprocessor function call (#794686)
48 * Fix long label causes coredump (#677841)
49 * Use autoheader as well as autoconf to keep configure from generating
50 ridiculously long command lines.
51 * Make sure that all of the formats which support debugging output
52 actually will suppress debugging output when -g not specified.
56 * Paths given in "-I" switch searched for "incbin"ed as
57 well as "%include"ed files.
58 * Added stabs debugging for the ELF output format, patch from
60 * Fix output/outbin.c to allow origin > 80000000h.
61 * Make -U switch work.
62 * Fix the use of relative offsets with explicit prefixes, e.g. "a32 loop foo".
63 * Remove "backslash()".
64 * Fix the SMSW and SLDT instructions.
65 * -O2 and -O3 are no longer aliases for -O10 and -O15. If you mean the
66 latter, please say so! :)
70 * Update rdoff - librarian/archiver - common rec - docs!
71 * Fix signed/unsigned problems.
72 * Fix JMP FAR label and CALL FAR label.
73 * Add new multisection support - map files - fix align bug
74 * Fix sysexit, movhps/movlps reg,reg bugs in insns.dat
75 * "Q" or "O" suffixes indicate octal
76 * Support Prescott new instructions (PNI).
77 * Cyrix XSTORE instruction.
81 * Fix build failure on 16-bit DOS (Makefile.bc3 workaround for compiler bug.)
82 * Fix dependencies and compiler warnings.
83 * Add "const" in a number of places.
84 * Add -X option to specify error reporting format (use -Xvc to
85 integrate with Microsoft Visual Studio.)
86 * Minor changes for code legibility.
87 * Drop use of tmpnam() in rdoff (security fix.)
91 * Correct additional address-size vs. operand-size confusions.
92 * Generate dependencies for all Makefiles automatically.
93 * Add support for unimplemented (but theoretically available)
94 registers such as tr0 and cr5. Segment registers 6 and 7 are called
95 segr6 and segr7 for the operations which they can be represented.
96 * Correct some disassembler bugs related to redundant address-size prefixes.
97 Some work still remains in this area.
98 * Correctly generate an error for things like "SEG eax".
99 * Add the JMPE instruction, enabled by "CPU IA64".
100 * Correct compilation on newer gcc/glibc platforms.
101 * Issue an error on things like "jmp far eax".
107 * New __NASM_PATCHLEVEL__ and __NASM_VERSION_ID__ standard macros to
108 round out the version-query macros. version.pl now understands
109 X.YYplWW or X.YY.ZZplWW as a version number, equivalent to
110 X.YY.ZZ.WW (or X.YY.0.WW, as appropriate).
111 * New keyword "strict" to disable the optimization of specific
113 * Fix the handing of size overrides with JMP instructions
114 (instructions such as "jmp dword foo".)
115 * Fix the handling of "ABSOLUTE label", where "label" points into a
117 * Fix OBJ output format with lots of externs.
118 * More documentation updates.
119 * Add -Ov option to get verbose information about optimizations.
120 * Undo a braindead change which broke %elif directives.
127 * Fix NASM crashing when %macro directives were left unterminated.
128 * Lots of documentation updates.
129 * Complete rewrite of the PostScript/PDF documentation generator.
130 * The MS Visual C++ Makefile was updated and corrected.
131 * Recognize .rodata as a standard section name in ELF.
132 * Fix some obsolete Perl4-isms in Perl scripts.
133 * Fix configure.in to work with autoconf 2.5x.
134 * Fix a couple of "make cleaner" misses.
135 * Make the normal "./configure && make" work with Cygwin.
141 * Correctly build in a separate object directory again.
142 * Derive all references to the version number from the version file.
143 * New standard macros __NASM_SUBMINOR__ and __NASM_VER__ macros.
144 * Lots of Makefile updates and bug fixes.
145 * New %ifmacro directive to test for multiline macros.
146 * Documentation updates.
147 * Fixes for 16-bit OBJ format output.
148 * Changed the NASM environment variable to NASMENV.
154 * Changed doc files a lot: completely removed old READMExx and
155 Wishlist files, incorporating all information in CHANGES and TODO.
156 * I waited a long time to rename zoutieee.c to (original) outieee.c
157 * moved all output modules to output/ subdirectory.
158 * Added 'make strip' target to strip debug info from nasm & ndisasm.
159 * Added INSTALL file with installation instructions.
160 * Added -v option description to nasm man.
161 * Added dist makefile target to produce source distributions.
162 * 16-bit support for ELF output format (GNU extension, but useful.)
168 * Fastcooked this for Debian's Woody release:
169 Frank applied the INCBIN bug patch to 0.98.25alt and called
170 it 0.98.28 to not confuse poor little apt-get.
176 * Reorganised files even better from 0.98.25alt
182 * Prettified the source tree. Moved files to more reasonable places.
183 * Added findleak.pl script to misc/ directory.
184 * Attempted to fix doc.
189 * Line continuation character '\'
190 * Docs inadvertantly reverted - "dos packaging".
196 * FIXME: Someone, document this please.
202 * Documentation - Ndisasm doc added to Nasm.doc.
208 * Attempted to remove rdoff version1
209 * Lino Mastrodomenico's patches to preproc.c (%$$ bug?).
215 * Update rdoff2 - attempt to remove v1.
221 * Optimization fixes.
227 * Optimization fixes.
233 * H. J. Lu's patch back out.
239 * Added ".rdata" to "-f win32".
245 * H. J. Lu's "bogus elf" patch. (Red Hat problem?)
251 * Fix whitespace before "[section ..." bug.
257 * Fix fixes to memory leaks.
263 * (there was no '.13)
268 * Update optimization (new function of "-O1")
269 * Changes to test/bintest.asm (?).
274 * Optimization changes.
276 * (there was no '.10)
281 * Add multiple sections support to "-f bin".
282 * Changed GLOBAL_TEMP_BASE in outelf.c from 6 to 15.
283 * Add "-v" as an alias to the "-r" switch.
284 * Remove "#ifdef" from Tasm compatibility options.
285 * Remove redundant size-overrides on "mov ds, ex", etc.
286 * Fixes to SSE2, other insns.dat (?).
287 * Enable uppercase "I" and "P" switches.
288 * Case insinsitive "seg" and "wrt".
289 * Update install.sh (?).
290 * Allocate tokens in blocks.
291 * Improve "invalid effective address" messages.
296 * Add "%strlen" and "%substr" macro operators
297 * Fixed broken c16.mac.
298 * Unterminated string error reported.
299 * Fixed bugs as per 0.98bf
302 0.98.09b with John Coffman patches released 28-Oct-2001
303 -------------------------------------------------------
305 Changes from 0.98.07 release to 98.09b as of 28-Oct-2001
307 * More closely compatible with 0.98 when -O0 is implied
308 or specified. Not strictly identical, since backward
309 branches in range of short offsets are recognized, and signed
310 byte values with no explicit size specification will be
311 assembled as a single byte.
313 * More forgiving with the PUSH instruction. 0.98 requires
314 a size to be specified always. 0.98.09b will imply the size
315 from the current BITS setting (16 or 32).
317 * Changed definition of the optimization flag:
319 -O0 strict two-pass assembly, JMP and Jcc are
320 handled more like 0.98, except that back-
321 ward JMPs are short, if possible.
323 -O1 strict two-pass assembly, but forward
324 branches are assembled with code guaranteed
325 to reach; may produce larger code than
326 -O0, but will produce successful assembly
327 more often if branch offset sizes are not
330 -O2 multi-pass optimization, minimize branch
331 offsets; also will minimize signed immed-
332 iate bytes, overriding size specification.
334 -O3 like -O2, but more passes taken, if needed
337 0.98.07 released 01/28/01
338 -------------------------
340 * Added Stepane Denis' SSE2 instructions to a *working*
341 version of the code - some earlier versions were based on
342 broken code - sorry 'bout that. version "0.98.07"
348 * Cosmetic modifications to nasm.c, nasm.h,
352 0.98.06f released 01/18/01
353 --------------------------
355 * - Add "metalbrain"s jecxz bug fix in insns.dat
356 - alter nasmdoc.src to match - version "0.98.06f"
359 0.98.06e released 01/09/01
360 --------------------------
362 * Removed the "outforms.h" file - it appears to be
363 someone's old backup of "outform.h". version "0.98.06e"
369 * fbk - finally added the fix for the "multiple %includes bug",
370 known since 7/27/99 - reported originally (?) and sent to
371 us by Austin Lunnen - he reports that John Fine had a fix
372 within the day. Here it is...
374 * Nelson Rush resigns from the group. Big thanks to Nelson for
375 his leadership and enthusiasm in getting these changes
376 incorporated into Nasm!
378 * fbk - [list +], [list -] directives - ineptly implemented, should
379 be re-written or removed, perhaps.
381 * Brian Raiter / fbk - "elfso bug" fix - applied to aoutb format
382 as well - testing might be desirable...
388 * James Seter - -postfix, -prefix command line switches.
389 * Yuri Zaporogets - rdoff utility changes.
395 * GAS-like palign (Panos Minos)
396 * FIXME: Someone, fill this in with details
400 ----------------------------------
402 * Fixed - elf and aoutb bug - shared libraries
403 - multiple "%include" bug in "-f obj"
405 - unrecognized option bug in ndisasm
407 0.98.03 with John Coffman's changes released 27-Jul-2000
408 --------------------------------------------------------
410 * Added signed byte optimizations for the 0x81/0x83 class
411 of instructions: ADC, ADD, AND, CMP, OR, SBB, SUB, XOR:
412 when used as 'ADD reg16,imm' or 'ADD reg32,imm.' Also
413 optimization of signed byte form of 'PUSH imm' and 'IMUL
414 reg,imm'/'IMUL reg,reg,imm.' No size specification is needed.
416 * Added multi-pass JMP and Jcc offset optimization. Offsets
417 on forward references will preferentially use the short form,
418 without the need to code a specific size (short or near) for
419 the branch. Added instructions for 'Jcc label' to use the
420 form 'Jnotcc $+3/JMP label', in cases where a short offset
421 is out of bounds. If compiling for a 386 or higher CPU, then
422 the 386 form of Jcc will be used instead.
424 This feature is controlled by a new command-line switch: "O",
425 (upper case letter O). "-O0" reverts the assembler to no
426 extra optimization passes, "-O1" allows up to 5 extra passes,
427 and "-O2"(default), allows up to 10 extra optimization passes.
429 * Added a new directive: 'cpu XXX', where XXX is any of:
430 8086, 186, 286, 386, 486, 586, pentium, 686, PPro, P2, P3 or
431 Katmai. All are case insensitive. All instructions will
432 be selected only if they apply to the selected cpu or lower.
433 Corrected a couple of bugs in cpu-dependence in 'insns.dat'.
435 * Added to 'standard.mac', the "use16" and "use32" forms of
436 the "bits 16/32" directive. This is nothing new, just conforms
437 to a lot of other assemblers. (minor)
439 * Changed label allocation from 320/32 (10000 labels @ 200K+)
440 to 32/37 (1000 labels); makes running under DOS much easier.
441 Since additional label space is allocated dynamically, this
442 should have no effect on large programs with lots of labels.
443 The 37 is a prime, believed to be better for hashing. (minor)
445 * Integrated patchfile 0.98-0.98.01. I call this version
446 0.98.03, for historical reasons: 0.98.02 was trashed.
448 --John Coffman <johninsd@san.rr.com> 27-Jul-2000
451 Kendall Bennett's SciTech MGL changes
452 -------------------------------------
453 Note that you must define "TASM_COMPAT" at compile-time
454 to get the Tasm Ideal Mode compatibility.
456 All changes can be compiled in and out using the TASM_COMPAT macros,
457 and when compiled without TASM_COMPAT defined we get the exact same
458 binary as the unmodified 0.98 sources.
460 standard.mac, macros.c:
461 . Added macros to ignore TASM directives before first include
464 . Added extern declaration for tasm_compatible_mode
467 . Added global variable tasm_compatible_mode
468 . Added command line switch for TASM compatible mode (-t)
469 . Changed version command line to reflect when compiled with TASM additions
470 . Added response file processing to allow all arguments on a single
471 line (response file is @resp rather than -@resp for NASM format).
474 . Changes islocal() macro to support TASM style @@local labels.
475 . Added islocalchar() macro to support TASM style @@local labels.
478 . Added support for TASM style memory references (ie: mov [DWORD eax],10
479 rather than the NASM style mov DWORD [eax],10).
482 . Added new directives, %arg, %local, %stacksize to directives table
483 . Added support for TASM style directives without a leading % symbol.
485 Integrated a block of changes from Andrew Zabolotny <bit@eltech.ru>:
487 * A new keyword %xdefine and its case-insensitive counterpart %ixdefine.
488 They work almost the same way as %define and %idefine but expand
489 the definition immediately, not on the invocation. Something like a cross
490 between %define and %assign. The "x" suffix stands for "eXpand", so
491 "xdefine" can be deciphered as "expand-and-define". Thus you can do
497 %xdefine %1 dword [esp+ofs]
501 * Changed the place where the expansion of %$name macros are expanded.
502 Now they are converted into ..@ctxnum.name form when detokenizing, so
503 there are no quirks as before when using %$name arguments to macros,
504 in macros etc. For example:
513 Now last line will be expanded into "hello" as expected. This also allows
514 for lots of goodies, a good example are extended "proc" macros included
517 * Added a check for "cstk" in smacro_defined() before calling get_ctx() -
518 this allows for things like:
523 to work without warnings even in no context.
525 * Added a check for "cstk" in %if*ctx and %elif*ctx directives -
526 this allows to use %ifctx without excessive warnings. If there is
527 no active context, %ifctx goes through "false" branch.
529 * Removed "user error: " prefix with %error directive: it just clobbers the
530 output and has absolutely no functionality. Besides, this allows to write
531 macros that does not differ from built-in functions in any way.
533 * Added expansion of string that is output by %error directive. Now you
536 %define hello(x) Hello, x!
539 %error "hello(%$name)"
541 Same happened with %include directive.
543 * Now all directives that expect an identifier will try to expand and
544 concatenate everything without whitespaces in between before usage.
545 For example, with "unfixed" nasm the commands
548 %define __%$abc goodbye
551 would produce "incorrect" output: last line will expand to
555 Not quite what you expected, eh? :-) The answer is that preprocessor
556 treats the %define construct as if it would be
558 %define __ %$abc goodbye
560 (note the white space between __ and %$abc). After my "fix" it
561 will "correctly" expand into
565 as expected. Note that I use quotes around words "correct", "incorrect"
566 etc because this is rather a feature not a bug; however current behaviour
567 is more logical (and allows more advanced macro usage :-).
569 Same change was applied to:
570 %push,%macro,%imacro,%define,%idefine,%xdefine,%ixdefine,
571 %assign,%iassign,%undef
573 * A new directive [WARNING {+|-}warning-id] have been added. It works only
574 if the assembly phase is enabled (i.e. it doesn't work with nasm -e).
576 * A new warning type: macro-selfref. By default this warning is disabled;
577 when enabled NASM warns when a macro self-references itself; for example
578 the following source:
580 [WARNING macro-selfref]
591 will produce a warning, but if we remove the first line we won't see it
592 anymore (which is The Right Thing To Do {tm} IMHO since C preprocessor
593 eats such constructs without warnings at all).
595 * Added a "error" routine to preprocessor which always will set ERR_PASS1
596 bit in severity_code. This removes annoying repeated errors on first
597 and second passes from preprocessor.
599 * Added the %+ operator in single-line macros for concatenating two
600 identifiers. Usage example:
602 %define _myfunc _otherfunc
603 %define cextern(x) _ %+ x
606 After first expansion, third line will become "_myfunc". After this
607 expansion is performed again so it becomes "_otherunc".
609 * Now if preprocessor is in a non-emmitting state, no warning or error
610 will be emmitted. Example:
615 put anything you want between these two brackets,
616 even macro-parameter references %1 or local labels %$zz
617 or macro-local labels %%zz - no warning will be emmitted.
620 * Context-local variables on expansion as a last resort are looked up
621 in outer contexts. For example, the following piece:
631 will expand correctly the fourth line to [esp]; if we'll define another
632 %$a inside the "inner" context, it will take precedence over outer
633 definition. However, this modification has been applied only to
634 expand_smacro and not to smacro_define: as a consequence expansion
635 looks in outer contexts, but %ifdef won't look in outer contexts.
637 This behaviour is needed because we don't want nested contexts to
638 act on already defined local macros. Example:
640 %define %$arg1 [esp+4]
646 In this example the "if" mmacro enters into the "if" context, so %$arg1
647 is not valid anymore inside "if". Of course it could be worked around
648 by using explicitely %$$arg1 but this is ugly IMHO.
650 * Fixed memory leak in %undef. The origline wasn't freed before
653 * Fixed trap in preprocessor when line expanded to empty set of tokens.
654 This happens, for example, in the following case:
663 All changes since NASM 0.98p3 have been produced by H. Peter Anvin <hpa@zytor.com>.
665 * The documentation comment delimiter is \# not #.
666 * Allow EQU definitions to refer to external labels; reported by
668 * Re-enable support for RDOFF v1; reported by Pedro Gimeno.
669 * Updated License file per OK from Simon and Julian.
675 * Update documentation (although the instruction set reference will
676 have to wait; I don't want to hold up the 0.98 release for it.)
677 * Verified that the NASM implementation of the PEXTRW and PMOVMSKB
678 instructions is correct. The encoding differs from what the Intel
679 manuals document, but the Pentium III behaviour matches NASM, not
681 * Fix handling of implicit sizes in PSHUFW and PINSRW, reported by
683 * Resurrect the -s option, which was removed when changing the
684 diagnostic output to stdout.
690 * Fix for "DB" when NASM is running on a bigendian machine.
691 * Invoke insns.pl once for each output script, making Makefile.in
693 * Improve the Unix configure-based makefiles to make package
695 * Included an RPM .spec file for building RPM (RedHat Package Manager)
696 packages on Linux or Unix systems.
697 * Fix Makefile dependency problems.
698 * Change src/rdsrc.pl to include sectioning information in info
699 output; required for install-info to work.
700 * Updated the RDOFF distribution to version 2 from Jules; minor
701 massaging to make it compile in my environment.
702 * Split doc files that can be built by anyone with a Perl interpreter off
703 into a separate archive.
704 * "Dress rehearsal" release!
710 * Fixed opcodes with a third byte-sized immediate argument to not
711 complain if given "byte" on the immediate.
712 * Allow %undef to remove single-line macros with arguments. This
713 matches the behaviour of #undef in the C preprocessor.
714 * Allow -d, -u, -i and -p to be specified as -D, -U, -I and -P for
715 compatibility with most C compilers and preprocessors. This allows
716 Makefile options to be shared between cc and nasm, for example.
718 * Went through the list of Katmai instructions and hopefully fixed the
719 (rather few) mistakes in it.
720 * (Hopefully) fixed a number of disassembler bugs related to ambiguous
721 instructions (disambiguated by -p) and SSE instructions with REP.
722 * Fix for bug reported by Mark Junger: "call dword 0x12345678" should
723 work and may add an OSP (affected CALL, JMP, Jcc).
724 * Fix for environments when "stderr" isn't a compile-time constant.
730 * Took officially over coordination of the 0.98 release; so drop
731 the p3.x notation. Skipped p4 and p5 to avoid confusion with John
732 Fine's J4 and J5 releases.
733 * Update the documentation; however, it still doesn't include
734 documentation for the various new instructions. I somehow wonder if
735 it makes sense to have an instruction set reference in the assembler
736 manual when Intel et al have PDF versions of their manuals online.
737 * Recognize "idt" or "centaur" for the -p option to ndisasm.
738 * Changed error messages back to stderr where they belong, but add an
739 -E option to redirect them elsewhere (the DOS shell cannot redirect
741 * -M option to generate Makefile dependencies (based on code from Alex
743 * %undef preprocessor directive, and -u option, that undefines a
745 * OS/2 Makefile (Mkfiles/Makefile.os2) for Borland under OS/2; from
747 * Various minor bugfixes (reported by):
748 - Dangling %s in preproc.c (Martin Junker)
749 * THERE ARE KNOWN BUGS IN SSE AND THE OTHER KATMAI INSTRUCTIONS. I am
750 on a trip and didn't bring the Katmai instruction reference, so I
751 can't work on them right now.
752 * Updated the License file per agreement with Simon and Jules to
753 include a GPL distribution clause.
759 * (Hopefully) fixed the canned Makefiles to include the outrdf2 and
761 * Renamed changes.asm to changed.asm.
767 * Fixed a bunch of instructions that were added in 0.98p3.5 which had
768 memory operands, and the address-size prefix was missing from the
775 * Merged in changes from John S. Fine's 0.98-J5 release. John's based
776 0.98-J5 on my 0.98p3.3 release; this merges the changes.
777 * Expanded the instructions flag field to a long so we can fit more
778 flags; mark SSE (KNI) and AMD or Katmai-specific instructions as
780 * Fix the "PRIV" flag on a bunch of instructions, and create new
781 "PROT" flag for protected-mode-only instructions (orthogonal to if
782 the instruction is privileged!) and new "SMM" flag for SMM-only
784 * Added AMD-only SYSCALL and SYSRET instructions.
785 * Make SSE actually work, and add new Katmai MMX instructions.
786 * Added a -p (preferred vendor) option to ndisasm so that it can
787 distinguish e.g. Cyrix opcodes also used in SSE. For example:
789 ndisasm -p cyrix aliased.bin
790 00000000 670F514310 paddsiw mm0,[ebx+0x10]
791 00000005 670F514320 paddsiw mm0,[ebx+0x20]
792 ndisasm -p intel aliased.bin
793 00000000 670F514310 sqrtps xmm0,[ebx+0x10]
794 00000005 670F514320 sqrtps xmm0,[ebx+0x20]
795 * Added a bunch of Cyrix-specific instructions.
801 * Made at least an attempt to modify all the additional Makefiles (in
802 the Mkfiles directory). I can't test it, but this was the best I
804 * DOS DJGPP+"Opus Make" Makefile from John S. Fine.
805 * changes.asm changes from John S. Fine.
811 * Patch from Conan Brink to allow nesting of %rep directives.
812 * If we're going to allow INT01 as an alias for INT1/ICEBP (one of
813 Jules 0.98p3 changes), then we should allow INT03 as an alias for INT3
815 * Updated changes.asm to include the latest changes.
816 * Tried to clean up the <CR>s that had snuck in from a DOS/Windows
817 environment into my Unix environment, and try to make sure than
818 DOS/Windows users get them back.
819 * We would silently generate broken tools if insns.dat wasn't sorted
820 properly. Change insns.pl so that the order doesn't matter.
821 * Fix bug in insns.pl (introduced by me) which would cause conditional
822 instructions to have an extra "cc" in disassembly, e.g. "jnz"
823 disassembled as "jccnz".
829 * Merged in John S. Fine's changes from his 0.98-J4 prerelease; see
830 http://www.csoft.net/cz/johnfine/
831 * Changed previous "spotless" Makefile target (appropriate for distribution)
832 to "distclean", and added "cleaner" target which is same as "clean"
833 except deletes files generated by Perl scripts; "spotless" is union.
834 * Removed BASIC programs from distribution. Get a Perl interpreter
836 * Calling this "pre-release 3.2" rather than "p3-hpa2" because of
837 John's contributions.
838 * Actually link in the IEEE output format (zoutieee.c); fix a bunch of
839 compiler warnings in that file. Note I don't know what IEEE output
840 is supposed to look like, so these changes were made "blind".
846 * Merged nasm098p3.zip with nasm-0.97.tar.gz to create a fully
847 buildable version for Unix systems (Makefile.in updates, etc.)
848 * Changed insns.pl to create the instruction tables in nasm.h and
849 names.c, so that a new instruction can be added by adding it *only*
851 * Added the following new instructions: SYSENTER, SYSEXIT, FXSAVE,
852 FXRSTOR, UD1, UD2 (the latter two are two opcodes that Intel
853 guarantee will never be used; one of them is documented as UD2 in
854 Intel documentation, the other one just as "Undefined Opcode" --
855 calling it UD1 seemed to make sense.)
856 * MAX_SYMBOL was defined to be 9, but LOADALL286 and LOADALL386 are 10
857 characters long. Now MAX_SYMBOL is derived from insns.dat.
858 * A note on the BASIC programs included: forget them. insns.bas is
859 already out of date. Get yourself a Perl interpreter for your
860 platform of choice at:
862 http://www.cpan.org/ports/index.html
868 added response file support, improved command line handling, new layout
871 fixed limit checking bug, 'OUT byte nn, reg' bug, and a couple of rdoff
872 related bugs, updated Wishlist; 0.98 Prerelease 3.
878 fixed bug in outcoff.c to do with truncating section names longer
879 than 8 characters, referencing beyond end of string; 0.98 pre-release 2
882 0.98 pre-released May 1999
883 --------------------------
885 Fixed a bug whereby STRUC didn't work at all in RDF.
887 Fixed a problem with group specification in PUBDEFs in OBJ.
889 Improved ease of adding new output formats. Contribution due to
892 Fixed a bug in relocations in the `bin' format: was showing up when
893 a relocatable reference crossed an 8192-byte boundary in any output
896 Fixed a bug in local labels: local-label lookups were inconsistent
897 between passes one and two if an EQU occurred between the definition
898 of a global label and the subsequent use of a local label local to
901 Fixed a seg-fault in the preprocessor (again) which happened when
902 you use a blank line as the first line of a multi-line macro
903 definition and then defined a label on the same line as a call to
906 Fixed a stale-pointer bug in the handling of the NASM environment
907 variable. Thanks to Thomas McWilliams.
909 ELF had a hard limit on the number of sections which caused
910 segfaults when transgressed. Fixed.
912 Added ability for ndisasm to read from stdin by using `-' as the
915 ndisasm wasn't outputting the TO keyword. Fixed.
917 Fixed error cascade on bogus expression in %if - an error in
918 evaluation was causing the entire %if to be discarded, thus creating
919 trouble later when the %else or %endif was encountered.
921 Forward reference tracking was instruction-granular not operand-
922 granular, which was causing 286-specific code to be generated
923 needlessly on code of the form `shr word [forwardref],1'. Thanks to
924 Jim Hague for sending a patch.
926 All messages now appear on stdout, as sending them to stderr serves
927 no useful purpose other than to make redirection difficult.
929 Fixed the problem with EQUs pointing to an external symbol - this
930 now generates an error message.
932 Allowed multiple size prefixes to an operand, of which only the first
933 is taken into account.
935 Incorporated John Fine's changes, including fixes of a large number
936 of preprocessor bugs, some small problems in OBJ, and a reworking of
937 label handling to define labels before their line is assembled, rather
940 Reformatted a lot of the source code to be more readable. Included
941 'coding.txt' as a guideline for how to format code for contributors.
943 Stopped nested %reps causing a panic - they now cause a slightly more
944 friendly error message instead.
946 Fixed floating point constant problems (patch by Pedro Gimeno)
948 Fixed the return value of insn_size() not being checked for -1, indicating
951 Incorporated 3D now instructions.
953 Fixed the 'mov eax, eax + ebx' bug.
955 Fixed the GLOBAL EQU bug in ELF. Released developers release 3.
957 Incorporated John Fine's command line parsing changes
959 Incorporated David Lindauer's OMF debug support
961 Made changes for LCC 4.0 support (__NASM_CDecl__, removed register size
962 specification warning when sizes agree).
964 Released NASM 0.98 Pre-release 1
967 0.97 released December 1997
968 ---------------------------
970 This was entirely a bug-fix release to 0.96, which seems to have got
973 Fixed stupid mistake in OBJ which caused `MOV EAX,<constant>' to
974 fail. Caused by an error in the `MOV EAX,<segment>' support.
976 ndisasm hung at EOF when compiled with lcc on Linux because lcc on
977 Linux somehow breaks feof(). ndisasm now does not rely on feof().
979 A heading in the documentation was missing due to a markup error in
982 Fixed failure to update all pointers on realloc() within extended-
983 operand code in parser.c. Was causing wrong behaviour and seg faults
984 on lines such as `dd 0.0,0.0,0.0,0.0,...'
986 Fixed a subtle preprocessor bug whereby invoking one multi-line
987 macro on the first line of the expansion of another, when the second
988 had been invoked with a label defined before it, didn't expand the
991 Added internal.doc back in to the distribution archives - it was
992 missing in 0.96 *blush*
994 Fixed bug causing 0.96 to be unable to assemble its own test files,
995 specifically objtest.asm. *blush again*
997 Fixed seg-faults and bogus error messages caused by mismatching
998 %rep and %endrep within multi-line macro definitions.
1000 Fixed a problem with buffer overrun in OBJ, which was causing
1001 corruption at ends of long PUBDEF records.
1003 Separated DOS archives into main-program and documentation to reduce
1007 0.96 released November 1997
1008 ---------------------------
1010 Fixed a bug whereby, if `nasm sourcefile' would cause a filename
1011 collision warning and put output into `nasm.out', then `nasm
1012 sourcefile -o outputfile' still gave the warning even though the
1015 Fixed name pollution under Digital UNIX: one of its header files
1016 defined R_SP, which broke the enum in nasm.h.
1018 Fixed minor instruction table problems: FUCOM and FUCOMP didn't have
1019 two-operand forms; NDISASM didn't recognise the longer register
1020 forms of PUSH and POP (eg FF F3 for PUSH BX); TEST mem,imm32 was
1021 flagged as undocumented; the 32-bit forms of CMOV had 16-bit operand
1022 size prefixes; `AAD imm' and `AAM imm' are no longer flagged as
1023 undocumented because the Intel Architecture reference documents
1026 Fixed a problem with the local-label mechanism, whereby strange
1027 types of symbol (EQUs, auto-defined OBJ segment base symbols)
1028 interfered with the `previous global label' value and screwed up
1031 Fixed a bug whereby the stub preprocessor didn't communicate with
1032 the listing file generator, so that the -a and -l options in
1033 conjunction would produce a useless listing file.
1035 Merged `os2' object file format back into `obj', after discovering
1036 that `obj' _also_ shouldn't have a link pass separator in a module
1037 containing a non-trivial MODEND. Flat segments are now declared
1038 using the FLAT attribute. `os2' is no longer a valid object format
1041 Removed the fixed-size temporary storage in the evaluator. Very very
1042 long expressions (like `mov ax,1+1+1+1+...' for two hundred 1s or
1043 so) should now no longer crash NASM.
1045 Fixed a bug involving segfaults on disassembly of MMX instructions,
1046 by changing the meaning of one of the operand-type flags in nasm.h.
1047 This may cause other apparently unrelated MMX problems; it needs to
1048 be tested thoroughly.
1050 Fixed some buffer overrun problems with large OBJ output files.
1051 Thanks to DJ Delorie for the bug report and fix.
1053 Made preprocess-only mode actually listen to the %line markers as it
1054 prints them, so that it can report errors more sanely.
1056 Re-designed the evaluator to keep more sensible track of expressions
1057 involving forward references: can now cope with previously-nightmare
1063 Added the ALIGN and ALIGNB standard macros.
1065 Added PIC support in ELF: use of WRT to obtain the four extra
1066 relocation types needed.
1068 Added the ability for output file formats to define their own
1069 extensions to the GLOBAL, COMMON and EXTERN directives.
1071 Implemented common-variable alignment, and global-symbol type and
1072 size declarations, in ELF.
1074 Implemented NEAR and FAR keywords for common variables, plus
1075 far-common element size specification, in OBJ.
1077 Added a feature whereby EXTERNs and COMMONs in OBJ can be given a
1078 default WRT specification (either a segment or a group).
1080 Transformed the Unix NASM archive into an auto-configuring package.
1082 Added a sanity-check for people applying SEG to things which are
1083 already segment bases: this previously went unnoticed by the SEG
1084 processing and caused OBJ-driver panics later.
1086 Added the ability, in OBJ format, to deal with `MOV EAX,<segment>'
1087 type references: OBJ doesn't directly support dword-size segment
1088 base fixups, but as long as the low two bytes of the constant term
1089 are zero, a word-size fixup can be generated instead and it will
1092 Added the ability to specify sections' alignment requirements in
1093 Win32 object files and pure binary files.
1095 Added preprocess-time expression evaluation: the %assign (and
1096 %iassign) directive and the bare %if (and %elif) conditional. Added
1097 relational operators to the evaluator, for use only in %if
1098 constructs: the standard relationals = < > <= >= <> (and C-like
1099 synonyms == and !=) plus low-precedence logical operators &&, ^^ and
1102 Added a preprocessor repeat construct: %rep / %exitrep / %endrep.
1104 Added the __FILE__ and __LINE__ standard macros.
1106 Added a sanity check for number constants being greater than
1107 0xFFFFFFFF. The warning can be disabled.
1109 Added the %0 token whereby a variadic multi-line macro can tell how
1110 many parameters it's been given in a specific invocation.
1112 Added %rotate, allowing multi-line macro parameters to be cycled.
1114 Added the `*' option for the maximum parameter count on multi-line
1115 macros, allowing them to take arbitrarily many parameters.
1117 Added the ability for the user-level forms of EXTERN, GLOBAL and
1118 COMMON to take more than one argument.
1120 Added the IMPORT and EXPORT directives in OBJ format, to deal with
1123 Added some more preprocessor %if constructs: %ifidn / %ifidni (exact
1124 textual identity), and %ifid / %ifnum / %ifstr (token type testing).
1126 Added the ability to distinguish SHL AX,1 (the 8086 version) from
1127 SHL AX,BYTE 1 (the 286-and-upwards version whose constant happens to
1130 Added NetBSD/FreeBSD/OpenBSD's variant of a.out format, complete
1131 with PIC shared library features.
1133 Changed NASM's idiosyncratic handling of FCLEX, FDISI, FENI, FINIT,
1134 FSAVE, FSTCW, FSTENV, and FSTSW to bring it into line with the
1135 otherwise accepted standard. The previous behaviour, though it was a
1136 deliberate feature, was a deliberate feature based on a
1137 misunderstanding. Apologies for the inconvenience.
1139 Improved the flexibility of ABSOLUTE: you can now give it an
1140 expression rather than being restricted to a constant, and it can
1141 take relocatable arguments as well.
1143 Added the ability for a variable to be declared as EXTERN multiple
1144 times, and the subsequent definitions are just ignored.
1146 We now allow instruction prefixes (CS, DS, LOCK, REPZ etc) to be
1147 alone on a line (without a following instruction).
1149 Improved sanity checks on whether the arguments to EXTERN, GLOBAL
1150 and COMMON are valid identifiers.
1152 Added misc/exebin.mac to allow direct generation of .EXE files by
1153 hacking up an EXE header using DB and DW; also added test/binexe.asm
1154 to demonstrate the use of this. Thanks to Yann Guidon for
1155 contributing the EXE header code.
1157 ndisasm forgot to check whether the input file had been successfully
1158 opened. Now it does. Doh!
1160 Added the Cyrix extensions to the MMX instruction set.
1162 Added a hinting mechanism to allow [EAX+EBX] and [EBX+EAX] to be
1163 assembled differently. This is important since [ESI+EBP] and
1164 [EBP+ESI] have different default base segment registers.
1166 Added support for the PharLap OMF extension for 4096-byte segment
1170 0.95 released July 1997
1171 -----------------------
1173 Fixed yet another ELF bug. This one manifested if the user relied on
1174 the default segment, and attempted to define global symbols without
1175 first explicitly declaring the target segment.
1177 Added makefiles (for NASM and the RDF tools) to build Win32 console
1178 apps under Symantec C++. Donated by Mark Junker.
1180 Added `macros.bas' and `insns.bas', QBasic versions of the Perl
1181 scripts that convert `standard.mac' to `macros.c' and convert
1182 `insns.dat' to `insnsa.c' and `insnsd.c'. Also thanks to Mark
1185 Changed the diassembled forms of the conditional instructions so
1186 that JB is now emitted as JC, and other similar changes. Suggested
1187 list by Ulrich Doewich.
1189 Added `@' to the list of valid characters to begin an identifier
1192 Documentary changes, notably the addition of the `Common Problems'
1193 section in nasm.doc.
1195 Fixed a bug relating to 32-bit PC-relative fixups in OBJ.
1197 Fixed a bug in perm_copy() in labels.c which was causing exceptions
1198 in cleanup_labels() on some systems.
1200 Positivity sanity check in TIMES argument changed from a warning to
1201 an error following a further complaint.
1203 Changed the acceptable limits on byte and word operands to allow
1204 things like `~10111001b' to work.
1206 Fixed a major problem in the preprocessor which caused seg-faults if
1207 macro definitions contained blank lines or comment-only lines.
1209 Fixed inadequate error checking on the commas separating the
1210 arguments to `db', `dw' etc.
1212 Fixed a crippling bug in the handling of macros with operand counts
1213 defined with a `+' modifier.
1215 Fixed a bug whereby object file formats which stored the input file
1216 name in the output file (such as OBJ and COFF) weren't doing so
1217 correctly when the output file name was specified on the command
1220 Removed [INC] and [INCLUDE] support for good, since they were
1223 Fixed a bug in OBJ which caused all fixups to be output in 16-bit
1224 (old-format) FIXUPP records, rather than putting the 32-bit ones in
1225 FIXUPP32 (new-format) records.
1227 Added, tentatively, OS/2 object file support (as a minor variant on
1230 Updates to Fox Cutter's Borland C makefile, Makefile.bc2.
1232 Removed a spurious second fclose() on the output file.
1234 Added the `-s' command line option to redirect all messages which
1235 would go to stderr (errors, help text) to stdout instead.
1237 Added the `-w' command line option to selectively suppress some
1238 classes of assembly warning messages.
1240 Added the `-p' pre-include and `-d' pre-define command-line options.
1242 Added an include file search path: the `-i' command line option.
1244 Fixed a silly little preprocessor bug whereby starting a line with a
1245 `%!' environment-variable reference caused an `unknown directive'
1248 Added the long-awaited listing file support: the `-l' command line
1251 Fixed a problem with OBJ format whereby, in the absence of any
1252 explicit segment definition, non-global symbols declared in the
1253 implicit default segment generated spurious EXTDEF records in the
1256 Added the NASM environment variable.
1258 From this version forward, Win32 console-mode binaries will be
1259 included in the DOS distribution in addition to the 16-bit binaries.
1260 Added Makefile.vc for this purpose.
1262 Added `return 0;' to test/objlink.c to prevent compiler warnings.
1264 Added the __NASM_MAJOR__ and __NASM_MINOR__ standard defines.
1266 Added an alternative memory-reference syntax in which prefixing an
1267 operand with `&' is equivalent to enclosing it in square brackets,
1268 at the request of Fox Cutter.
1270 Errors in pass two now cause the program to return a non-zero error
1271 code, which they didn't before.
1273 Fixed the single-line macro cycle detection, which didn't work at
1274 all on macros with no parameters (caused an infinite loop). Also
1275 changed the behaviour of single-line macro cycle detection to work
1276 like cpp, so that macros like `extrn' as given in the documentation
1279 Fixed the implementation of WRT, which was too restrictive in that
1280 you couldn't do `mov ax,[di+abc wrt dgroup]' because (di+abc) wasn't
1281 a relocatable reference.
1284 0.94 released April 1997
1285 ------------------------
1287 Major item: added the macro processor.
1289 Added undocumented instructions SMI, IBTS, XBTS and LOADALL286. Also
1290 reorganised CMPXCHG instruction into early-486 and Pentium forms.
1291 Thanks to Thobias Jones for the information.
1293 Fixed two more stupid bugs in ELF, which were causing `ld' to
1294 continue to seg-fault in a lot of non-trivial cases.
1296 Fixed a seg-fault in the label manager.
1298 Stopped FBLD and FBSTP from _requiring_ the TWORD keyword, which is
1299 the only option for BCD loads/stores in any case.
1301 Ensured FLDCW, FSTCW and FSTSW can cope with the WORD keyword, if
1302 anyone bothers to provide it. Previously they complained unless no
1303 keyword at all was present.
1305 Some forms of FDIV/FDIVR and FSUB/FSUBR were still inverted: a
1306 vestige of a bug that I thought had been fixed in 0.92. This was
1307 fixed, hopefully for good this time...
1309 Another minor phase error (insofar as a phase error can _ever_ be
1310 minor) fixed, this one occurring in code of the form
1311 rol ax,forward_reference
1312 forward_reference equ 1
1314 The number supplied to TIMES is now sanity-checked for positivity,
1315 and also may be greater than 64K (which previously didn't work on
1318 Added Watcom C makefiles, and misc/pmw.bat, donated by Dominik Behr.
1320 Added the INCBIN pseudo-opcode.
1322 Due to the advent of the preprocessor, the [INCLUDE] and [INC]
1323 directives have become obsolete. They are still supported in this
1324 version, with a warning, but won't be in the next.
1326 Fixed a bug in OBJ format, which caused incorrect object records to
1327 be output when absolute labels were made global.
1329 Updates to RDOFF subdirectory, and changes to outrdf.c.
1332 0.93 released January 1997
1333 --------------------------
1335 This release went out in a great hurry after semi-crippling bugs
1338 Really _did_ fix the stack overflows this time. *blush*
1340 Had problems with EA instruction sizes changing between passes, when
1341 an offset contained a forward reference and so 4 bytes were
1342 allocated for the offset in pass one; by pass two the symbol had
1343 been defined and happened to be a small absolute value, so only 1
1344 byte got allocated, causing instruction size mismatch between passes
1345 and hence incorrect address calculations. Fixed.
1347 Stupid bug in the revised ELF section generation fixed (associated
1348 string-table section for .symtab was hard-coded as 7, even when this
1349 didn't fit with the real section table). Was causing `ld' to
1350 seg-fault under Linux.
1352 Included a new Borland C makefile, Makefile.bc2, donated by Fox
1353 Cutter <lmb@comtch.iea.com>.
1356 0.92 released January 1997
1357 --------------------------
1359 The FDIVP/FDIVRP and FSUBP/FSUBRP pairs had been inverted: this was
1360 fixed. This also affected the LCC driver.
1362 Fixed a bug regarding 32-bit effective addresses of the form
1363 [other_register+ESP].
1365 Documentary changes, notably documentation of the fact that Borland
1366 Win32 compilers use `obj' rather than `win32' object format.
1368 Fixed the COMENT record in OBJ files, which was formatted
1371 Fixed a bug causing segfaults in large RDF files.
1373 OBJ format now strips initial periods from segment and group
1374 definitions, in order to avoid complications with the local label
1377 Fixed a bug in disassembling far calls and jumps in NDISASM.
1379 Added support for user-defined sections in COFF and ELF files.
1381 Compiled the DOS binaries with a sensible amount of stack, to
1382 prevent stack overflows on any arithmetic expression containing
1385 Fixed a bug in handling of files that do not terminate in a newline.
1388 0.91 released November 1996
1389 ---------------------------
1392 Support for RDF added.
1393 Support for DBG debugging format added.
1394 Support for 32-bit extensions to Microsoft OBJ format added.
1395 Revised for Borland C: some variable names changed, makefile added.
1396 LCC support revised to actually work.
1397 JMP/CALL NEAR/FAR notation added.
1398 `a16', `o16', `a32' and `o32' prefixes added.
1399 Range checking on short jumps implemented.
1400 MMX instruction support added.
1401 Negative floating point constant support added.
1402 Memory handling improved to bypass 64K barrier under DOS.
1403 $ prefix to force treatment of reserved words as identifiers added.
1404 Default-size mechanism for object formats added.
1405 Compile-time configurability added.
1406 `#', `@', `~' and `?' are now valid characters in labels.
1407 `-e' and `-k' options in NDISASM added.
1410 0.90 released October 1996
1411 --------------------------
1413 First release version. First support for object file output. Other
1414 changes from previous version (0.3x) too numerous to document.
projects / platform / upstream / nasm.git / blob