3 * Fix the handling of MMX registers with explicit "qword" tags on
4 memory (broken in 2.00 due to 64-bit changes.)
5 * Fix the PREFETCH instructions.
6 * Fix the documentation.
7 * Fix debugging info when using "-f elf" (backwards alias for "-f
9 * Man pages for rdoff tools (from the Debian project.)
13 * Added c99 data-type compliance.
14 * Added general x86-64 support.
15 * Added win64 (x86-64 COFF) output format.
16 * Added __BITS__ standard macro.
17 * Renamed the elf output format to elf32 for clarity.
18 * Added elf64 and macho (MacOS X) output formats.
19 * Added Numeric constants in DQ directive.
20 * Added oword, do and reso pseudo operands.
21 * Allow underscores in numbers.
22 * Added 8-, 16- and 128-bit floating-point formats.
23 * Added binary, octal and hexadecimal floating-point.
24 * Correct the generation of floating-point constants.
25 * Added Floating-point option control.
26 * Added Infinity and NaN floating point support.
27 * Added ELF Symbol Visibility support.
28 * Added Setting OSABI value in ELF header directive.
29 * Added Generate Makefile Dependencies option.
30 * Added Unlimited Optimization Passes option.
31 * Added %IFN and %ELIFN support.
32 * Added Logical Negation Operator.
33 * Enhanced Stack Relative Preprocessor Directives.
34 * Enhanced ELF Debug Formats.
35 * Enhanced Send Errors to a File option.
36 * Added SSSE3, SSE4.1, SSE4.2, SSE5 support.
37 * Added a large number of additional instructions.
38 * Significant performance improvements.
43 * fix outas86's .bss handling
44 * "make spotless" no longer deletes config.h.in.
45 * %(el)if(n)idn insensitivity to string quotes difference (#809300).
46 * (nasm.c) __OUTPUT_FORMAT__ changed to string value instead of symbol.
50 * Add Makefile for 16-bit DOS binaries under OpenWatcom, and modify
51 mkdep.pl to be able to generate completely pathless dependencies, as
52 required by OpenWatcom wmake (it supports path searches, but not
54 * Fix the STR instruction.
55 * Fix the ELF output format, which was broken under certain
56 circumstances due to the addition of stabs support.
57 * Quick-fix Borland format debug-info for -f obj
58 * Fix for %rep with no arguments (#560568)
59 * Fix concatenation of preprocessor function call (#794686)
60 * Fix long label causes coredump (#677841)
61 * Use autoheader as well as autoconf to keep configure from generating
62 ridiculously long command lines.
63 * Make sure that all of the formats which support debugging output
64 actually will suppress debugging output when -g not specified.
68 * Paths given in "-I" switch searched for "incbin"ed as
69 well as "%include"ed files.
70 * Added stabs debugging for the ELF output format, patch from
72 * Fix output/outbin.c to allow origin > 80000000h.
73 * Make -U switch work.
74 * Fix the use of relative offsets with explicit prefixes, e.g. "a32 loop foo".
75 * Remove "backslash()".
76 * Fix the SMSW and SLDT instructions.
77 * -O2 and -O3 are no longer aliases for -O10 and -O15. If you mean the
78 latter, please say so! :)
82 * Update rdoff - librarian/archiver - common rec - docs!
83 * Fix signed/unsigned problems.
84 * Fix JMP FAR label and CALL FAR label.
85 * Add new multisection support - map files - fix align bug
86 * Fix sysexit, movhps/movlps reg,reg bugs in insns.dat
87 * "Q" or "O" suffixes indicate octal
88 * Support Prescott new instructions (PNI).
89 * Cyrix XSTORE instruction.
93 * Fix build failure on 16-bit DOS (Makefile.bc3 workaround for compiler bug.)
94 * Fix dependencies and compiler warnings.
95 * Add "const" in a number of places.
96 * Add -X option to specify error reporting format (use -Xvc to
97 integrate with Microsoft Visual Studio.)
98 * Minor changes for code legibility.
99 * Drop use of tmpnam() in rdoff (security fix.)
103 * Correct additional address-size vs. operand-size confusions.
104 * Generate dependencies for all Makefiles automatically.
105 * Add support for unimplemented (but theoretically available)
106 registers such as tr0 and cr5. Segment registers 6 and 7 are called
107 segr6 and segr7 for the operations which they can be represented.
108 * Correct some disassembler bugs related to redundant address-size prefixes.
109 Some work still remains in this area.
110 * Correctly generate an error for things like "SEG eax".
111 * Add the JMPE instruction, enabled by "CPU IA64".
112 * Correct compilation on newer gcc/glibc platforms.
113 * Issue an error on things like "jmp far eax".
119 * New __NASM_PATCHLEVEL__ and __NASM_VERSION_ID__ standard macros to
120 round out the version-query macros. version.pl now understands
121 X.YYplWW or X.YY.ZZplWW as a version number, equivalent to
122 X.YY.ZZ.WW (or X.YY.0.WW, as appropriate).
123 * New keyword "strict" to disable the optimization of specific
125 * Fix the handing of size overrides with JMP instructions
126 (instructions such as "jmp dword foo".)
127 * Fix the handling of "ABSOLUTE label", where "label" points into a
129 * Fix OBJ output format with lots of externs.
130 * More documentation updates.
131 * Add -Ov option to get verbose information about optimizations.
132 * Undo a braindead change which broke %elif directives.
139 * Fix NASM crashing when %macro directives were left unterminated.
140 * Lots of documentation updates.
141 * Complete rewrite of the PostScript/PDF documentation generator.
142 * The MS Visual C++ Makefile was updated and corrected.
143 * Recognize .rodata as a standard section name in ELF.
144 * Fix some obsolete Perl4-isms in Perl scripts.
145 * Fix configure.in to work with autoconf 2.5x.
146 * Fix a couple of "make cleaner" misses.
147 * Make the normal "./configure && make" work with Cygwin.
153 * Correctly build in a separate object directory again.
154 * Derive all references to the version number from the version file.
155 * New standard macros __NASM_SUBMINOR__ and __NASM_VER__ macros.
156 * Lots of Makefile updates and bug fixes.
157 * New %ifmacro directive to test for multiline macros.
158 * Documentation updates.
159 * Fixes for 16-bit OBJ format output.
160 * Changed the NASM environment variable to NASMENV.
166 * Changed doc files a lot: completely removed old READMExx and
167 Wishlist files, incorporating all information in CHANGES and TODO.
168 * I waited a long time to rename zoutieee.c to (original) outieee.c
169 * moved all output modules to output/ subdirectory.
170 * Added 'make strip' target to strip debug info from nasm & ndisasm.
171 * Added INSTALL file with installation instructions.
172 * Added -v option description to nasm man.
173 * Added dist makefile target to produce source distributions.
174 * 16-bit support for ELF output format (GNU extension, but useful.)
180 * Fastcooked this for Debian's Woody release:
181 Frank applied the INCBIN bug patch to 0.98.25alt and called
182 it 0.98.28 to not confuse poor little apt-get.
188 * Reorganised files even better from 0.98.25alt
194 * Prettified the source tree. Moved files to more reasonable places.
195 * Added findleak.pl script to misc/ directory.
196 * Attempted to fix doc.
201 * Line continuation character '\'
202 * Docs inadvertantly reverted - "dos packaging".
208 * FIXME: Someone, document this please.
214 * Documentation - Ndisasm doc added to Nasm.doc.
220 * Attempted to remove rdoff version1
221 * Lino Mastrodomenico's patches to preproc.c (%$$ bug?).
227 * Update rdoff2 - attempt to remove v1.
233 * Optimization fixes.
239 * Optimization fixes.
245 * H. J. Lu's patch back out.
251 * Added ".rdata" to "-f win32".
257 * H. J. Lu's "bogus elf" patch. (Red Hat problem?)
263 * Fix whitespace before "[section ..." bug.
269 * Fix fixes to memory leaks.
275 * (there was no '.13)
280 * Update optimization (new function of "-O1")
281 * Changes to test/bintest.asm (?).
286 * Optimization changes.
288 * (there was no '.10)
293 * Add multiple sections support to "-f bin".
294 * Changed GLOBAL_TEMP_BASE in outelf.c from 6 to 15.
295 * Add "-v" as an alias to the "-r" switch.
296 * Remove "#ifdef" from Tasm compatibility options.
297 * Remove redundant size-overrides on "mov ds, ex", etc.
298 * Fixes to SSE2, other insns.dat (?).
299 * Enable uppercase "I" and "P" switches.
300 * Case insinsitive "seg" and "wrt".
301 * Update install.sh (?).
302 * Allocate tokens in blocks.
303 * Improve "invalid effective address" messages.
308 * Add "%strlen" and "%substr" macro operators
309 * Fixed broken c16.mac.
310 * Unterminated string error reported.
311 * Fixed bugs as per 0.98bf
314 0.98.09b with John Coffman patches released 28-Oct-2001
315 -------------------------------------------------------
317 Changes from 0.98.07 release to 98.09b as of 28-Oct-2001
319 * More closely compatible with 0.98 when -O0 is implied
320 or specified. Not strictly identical, since backward
321 branches in range of short offsets are recognized, and signed
322 byte values with no explicit size specification will be
323 assembled as a single byte.
325 * More forgiving with the PUSH instruction. 0.98 requires
326 a size to be specified always. 0.98.09b will imply the size
327 from the current BITS setting (16 or 32).
329 * Changed definition of the optimization flag:
331 -O0 strict two-pass assembly, JMP and Jcc are
332 handled more like 0.98, except that back-
333 ward JMPs are short, if possible.
335 -O1 strict two-pass assembly, but forward
336 branches are assembled with code guaranteed
337 to reach; may produce larger code than
338 -O0, but will produce successful assembly
339 more often if branch offset sizes are not
342 -O2 multi-pass optimization, minimize branch
343 offsets; also will minimize signed immed-
344 iate bytes, overriding size specification.
346 -O3 like -O2, but more passes taken, if needed
349 0.98.07 released 01/28/01
350 -------------------------
352 * Added Stepane Denis' SSE2 instructions to a *working*
353 version of the code - some earlier versions were based on
354 broken code - sorry 'bout that. version "0.98.07"
360 * Cosmetic modifications to nasm.c, nasm.h,
364 0.98.06f released 01/18/01
365 --------------------------
367 * - Add "metalbrain"s jecxz bug fix in insns.dat
368 - alter nasmdoc.src to match - version "0.98.06f"
371 0.98.06e released 01/09/01
372 --------------------------
374 * Removed the "outforms.h" file - it appears to be
375 someone's old backup of "outform.h". version "0.98.06e"
381 * fbk - finally added the fix for the "multiple %includes bug",
382 known since 7/27/99 - reported originally (?) and sent to
383 us by Austin Lunnen - he reports that John Fine had a fix
384 within the day. Here it is...
386 * Nelson Rush resigns from the group. Big thanks to Nelson for
387 his leadership and enthusiasm in getting these changes
388 incorporated into Nasm!
390 * fbk - [list +], [list -] directives - ineptly implemented, should
391 be re-written or removed, perhaps.
393 * Brian Raiter / fbk - "elfso bug" fix - applied to aoutb format
394 as well - testing might be desirable...
400 * James Seter - -postfix, -prefix command line switches.
401 * Yuri Zaporogets - rdoff utility changes.
407 * GAS-like palign (Panos Minos)
408 * FIXME: Someone, fill this in with details
412 ----------------------------------
414 * Fixed - elf and aoutb bug - shared libraries
415 - multiple "%include" bug in "-f obj"
417 - unrecognized option bug in ndisasm
419 0.98.03 with John Coffman's changes released 27-Jul-2000
420 --------------------------------------------------------
422 * Added signed byte optimizations for the 0x81/0x83 class
423 of instructions: ADC, ADD, AND, CMP, OR, SBB, SUB, XOR:
424 when used as 'ADD reg16,imm' or 'ADD reg32,imm.' Also
425 optimization of signed byte form of 'PUSH imm' and 'IMUL
426 reg,imm'/'IMUL reg,reg,imm.' No size specification is needed.
428 * Added multi-pass JMP and Jcc offset optimization. Offsets
429 on forward references will preferentially use the short form,
430 without the need to code a specific size (short or near) for
431 the branch. Added instructions for 'Jcc label' to use the
432 form 'Jnotcc $+3/JMP label', in cases where a short offset
433 is out of bounds. If compiling for a 386 or higher CPU, then
434 the 386 form of Jcc will be used instead.
436 This feature is controlled by a new command-line switch: "O",
437 (upper case letter O). "-O0" reverts the assembler to no
438 extra optimization passes, "-O1" allows up to 5 extra passes,
439 and "-O2"(default), allows up to 10 extra optimization passes.
441 * Added a new directive: 'cpu XXX', where XXX is any of:
442 8086, 186, 286, 386, 486, 586, pentium, 686, PPro, P2, P3 or
443 Katmai. All are case insensitive. All instructions will
444 be selected only if they apply to the selected cpu or lower.
445 Corrected a couple of bugs in cpu-dependence in 'insns.dat'.
447 * Added to 'standard.mac', the "use16" and "use32" forms of
448 the "bits 16/32" directive. This is nothing new, just conforms
449 to a lot of other assemblers. (minor)
451 * Changed label allocation from 320/32 (10000 labels @ 200K+)
452 to 32/37 (1000 labels); makes running under DOS much easier.
453 Since additional label space is allocated dynamically, this
454 should have no effect on large programs with lots of labels.
455 The 37 is a prime, believed to be better for hashing. (minor)
457 * Integrated patchfile 0.98-0.98.01. I call this version
458 0.98.03, for historical reasons: 0.98.02 was trashed.
460 --John Coffman <johninsd@san.rr.com> 27-Jul-2000
463 Kendall Bennett's SciTech MGL changes
464 -------------------------------------
465 Note that you must define "TASM_COMPAT" at compile-time
466 to get the Tasm Ideal Mode compatibility.
468 All changes can be compiled in and out using the TASM_COMPAT macros,
469 and when compiled without TASM_COMPAT defined we get the exact same
470 binary as the unmodified 0.98 sources.
472 standard.mac, macros.c:
473 . Added macros to ignore TASM directives before first include
476 . Added extern declaration for tasm_compatible_mode
479 . Added global variable tasm_compatible_mode
480 . Added command line switch for TASM compatible mode (-t)
481 . Changed version command line to reflect when compiled with TASM additions
482 . Added response file processing to allow all arguments on a single
483 line (response file is @resp rather than -@resp for NASM format).
486 . Changes islocal() macro to support TASM style @@local labels.
487 . Added islocalchar() macro to support TASM style @@local labels.
490 . Added support for TASM style memory references (ie: mov [DWORD eax],10
491 rather than the NASM style mov DWORD [eax],10).
494 . Added new directives, %arg, %local, %stacksize to directives table
495 . Added support for TASM style directives without a leading % symbol.
497 Integrated a block of changes from Andrew Zabolotny <bit@eltech.ru>:
499 * A new keyword %xdefine and its case-insensitive counterpart %ixdefine.
500 They work almost the same way as %define and %idefine but expand
501 the definition immediately, not on the invocation. Something like a cross
502 between %define and %assign. The "x" suffix stands for "eXpand", so
503 "xdefine" can be deciphered as "expand-and-define". Thus you can do
509 %xdefine %1 dword [esp+ofs]
513 * Changed the place where the expansion of %$name macros are expanded.
514 Now they are converted into ..@ctxnum.name form when detokenizing, so
515 there are no quirks as before when using %$name arguments to macros,
516 in macros etc. For example:
525 Now last line will be expanded into "hello" as expected. This also allows
526 for lots of goodies, a good example are extended "proc" macros included
529 * Added a check for "cstk" in smacro_defined() before calling get_ctx() -
530 this allows for things like:
535 to work without warnings even in no context.
537 * Added a check for "cstk" in %if*ctx and %elif*ctx directives -
538 this allows to use %ifctx without excessive warnings. If there is
539 no active context, %ifctx goes through "false" branch.
541 * Removed "user error: " prefix with %error directive: it just clobbers the
542 output and has absolutely no functionality. Besides, this allows to write
543 macros that does not differ from built-in functions in any way.
545 * Added expansion of string that is output by %error directive. Now you
548 %define hello(x) Hello, x!
551 %error "hello(%$name)"
553 Same happened with %include directive.
555 * Now all directives that expect an identifier will try to expand and
556 concatenate everything without whitespaces in between before usage.
557 For example, with "unfixed" nasm the commands
560 %define __%$abc goodbye
563 would produce "incorrect" output: last line will expand to
567 Not quite what you expected, eh? :-) The answer is that preprocessor
568 treats the %define construct as if it would be
570 %define __ %$abc goodbye
572 (note the white space between __ and %$abc). After my "fix" it
573 will "correctly" expand into
577 as expected. Note that I use quotes around words "correct", "incorrect"
578 etc because this is rather a feature not a bug; however current behaviour
579 is more logical (and allows more advanced macro usage :-).
581 Same change was applied to:
582 %push,%macro,%imacro,%define,%idefine,%xdefine,%ixdefine,
583 %assign,%iassign,%undef
585 * A new directive [WARNING {+|-}warning-id] have been added. It works only
586 if the assembly phase is enabled (i.e. it doesn't work with nasm -e).
588 * A new warning type: macro-selfref. By default this warning is disabled;
589 when enabled NASM warns when a macro self-references itself; for example
590 the following source:
592 [WARNING macro-selfref]
603 will produce a warning, but if we remove the first line we won't see it
604 anymore (which is The Right Thing To Do {tm} IMHO since C preprocessor
605 eats such constructs without warnings at all).
607 * Added a "error" routine to preprocessor which always will set ERR_PASS1
608 bit in severity_code. This removes annoying repeated errors on first
609 and second passes from preprocessor.
611 * Added the %+ operator in single-line macros for concatenating two
612 identifiers. Usage example:
614 %define _myfunc _otherfunc
615 %define cextern(x) _ %+ x
618 After first expansion, third line will become "_myfunc". After this
619 expansion is performed again so it becomes "_otherunc".
621 * Now if preprocessor is in a non-emmitting state, no warning or error
622 will be emmitted. Example:
627 put anything you want between these two brackets,
628 even macro-parameter references %1 or local labels %$zz
629 or macro-local labels %%zz - no warning will be emmitted.
632 * Context-local variables on expansion as a last resort are looked up
633 in outer contexts. For example, the following piece:
643 will expand correctly the fourth line to [esp]; if we'll define another
644 %$a inside the "inner" context, it will take precedence over outer
645 definition. However, this modification has been applied only to
646 expand_smacro and not to smacro_define: as a consequence expansion
647 looks in outer contexts, but %ifdef won't look in outer contexts.
649 This behaviour is needed because we don't want nested contexts to
650 act on already defined local macros. Example:
652 %define %$arg1 [esp+4]
658 In this example the "if" mmacro enters into the "if" context, so %$arg1
659 is not valid anymore inside "if". Of course it could be worked around
660 by using explicitely %$$arg1 but this is ugly IMHO.
662 * Fixed memory leak in %undef. The origline wasn't freed before
665 * Fixed trap in preprocessor when line expanded to empty set of tokens.
666 This happens, for example, in the following case:
675 All changes since NASM 0.98p3 have been produced by H. Peter Anvin <hpa@zytor.com>.
677 * The documentation comment delimiter is \# not #.
678 * Allow EQU definitions to refer to external labels; reported by
680 * Re-enable support for RDOFF v1; reported by Pedro Gimeno.
681 * Updated License file per OK from Simon and Julian.
687 * Update documentation (although the instruction set reference will
688 have to wait; I don't want to hold up the 0.98 release for it.)
689 * Verified that the NASM implementation of the PEXTRW and PMOVMSKB
690 instructions is correct. The encoding differs from what the Intel
691 manuals document, but the Pentium III behaviour matches NASM, not
693 * Fix handling of implicit sizes in PSHUFW and PINSRW, reported by
695 * Resurrect the -s option, which was removed when changing the
696 diagnostic output to stdout.
702 * Fix for "DB" when NASM is running on a bigendian machine.
703 * Invoke insns.pl once for each output script, making Makefile.in
705 * Improve the Unix configure-based makefiles to make package
707 * Included an RPM .spec file for building RPM (RedHat Package Manager)
708 packages on Linux or Unix systems.
709 * Fix Makefile dependency problems.
710 * Change src/rdsrc.pl to include sectioning information in info
711 output; required for install-info to work.
712 * Updated the RDOFF distribution to version 2 from Jules; minor
713 massaging to make it compile in my environment.
714 * Split doc files that can be built by anyone with a Perl interpreter off
715 into a separate archive.
716 * "Dress rehearsal" release!
722 * Fixed opcodes with a third byte-sized immediate argument to not
723 complain if given "byte" on the immediate.
724 * Allow %undef to remove single-line macros with arguments. This
725 matches the behaviour of #undef in the C preprocessor.
726 * Allow -d, -u, -i and -p to be specified as -D, -U, -I and -P for
727 compatibility with most C compilers and preprocessors. This allows
728 Makefile options to be shared between cc and nasm, for example.
730 * Went through the list of Katmai instructions and hopefully fixed the
731 (rather few) mistakes in it.
732 * (Hopefully) fixed a number of disassembler bugs related to ambiguous
733 instructions (disambiguated by -p) and SSE instructions with REP.
734 * Fix for bug reported by Mark Junger: "call dword 0x12345678" should
735 work and may add an OSP (affected CALL, JMP, Jcc).
736 * Fix for environments when "stderr" isn't a compile-time constant.
742 * Took officially over coordination of the 0.98 release; so drop
743 the p3.x notation. Skipped p4 and p5 to avoid confusion with John
744 Fine's J4 and J5 releases.
745 * Update the documentation; however, it still doesn't include
746 documentation for the various new instructions. I somehow wonder if
747 it makes sense to have an instruction set reference in the assembler
748 manual when Intel et al have PDF versions of their manuals online.
749 * Recognize "idt" or "centaur" for the -p option to ndisasm.
750 * Changed error messages back to stderr where they belong, but add an
751 -E option to redirect them elsewhere (the DOS shell cannot redirect
753 * -M option to generate Makefile dependencies (based on code from Alex
755 * %undef preprocessor directive, and -u option, that undefines a
757 * OS/2 Makefile (Mkfiles/Makefile.os2) for Borland under OS/2; from
759 * Various minor bugfixes (reported by):
760 - Dangling %s in preproc.c (Martin Junker)
761 * THERE ARE KNOWN BUGS IN SSE AND THE OTHER KATMAI INSTRUCTIONS. I am
762 on a trip and didn't bring the Katmai instruction reference, so I
763 can't work on them right now.
764 * Updated the License file per agreement with Simon and Jules to
765 include a GPL distribution clause.
771 * (Hopefully) fixed the canned Makefiles to include the outrdf2 and
773 * Renamed changes.asm to changed.asm.
779 * Fixed a bunch of instructions that were added in 0.98p3.5 which had
780 memory operands, and the address-size prefix was missing from the
787 * Merged in changes from John S. Fine's 0.98-J5 release. John's based
788 0.98-J5 on my 0.98p3.3 release; this merges the changes.
789 * Expanded the instructions flag field to a long so we can fit more
790 flags; mark SSE (KNI) and AMD or Katmai-specific instructions as
792 * Fix the "PRIV" flag on a bunch of instructions, and create new
793 "PROT" flag for protected-mode-only instructions (orthogonal to if
794 the instruction is privileged!) and new "SMM" flag for SMM-only
796 * Added AMD-only SYSCALL and SYSRET instructions.
797 * Make SSE actually work, and add new Katmai MMX instructions.
798 * Added a -p (preferred vendor) option to ndisasm so that it can
799 distinguish e.g. Cyrix opcodes also used in SSE. For example:
801 ndisasm -p cyrix aliased.bin
802 00000000 670F514310 paddsiw mm0,[ebx+0x10]
803 00000005 670F514320 paddsiw mm0,[ebx+0x20]
804 ndisasm -p intel aliased.bin
805 00000000 670F514310 sqrtps xmm0,[ebx+0x10]
806 00000005 670F514320 sqrtps xmm0,[ebx+0x20]
807 * Added a bunch of Cyrix-specific instructions.
813 * Made at least an attempt to modify all the additional Makefiles (in
814 the Mkfiles directory). I can't test it, but this was the best I
816 * DOS DJGPP+"Opus Make" Makefile from John S. Fine.
817 * changes.asm changes from John S. Fine.
823 * Patch from Conan Brink to allow nesting of %rep directives.
824 * If we're going to allow INT01 as an alias for INT1/ICEBP (one of
825 Jules 0.98p3 changes), then we should allow INT03 as an alias for INT3
827 * Updated changes.asm to include the latest changes.
828 * Tried to clean up the <CR>s that had snuck in from a DOS/Windows
829 environment into my Unix environment, and try to make sure than
830 DOS/Windows users get them back.
831 * We would silently generate broken tools if insns.dat wasn't sorted
832 properly. Change insns.pl so that the order doesn't matter.
833 * Fix bug in insns.pl (introduced by me) which would cause conditional
834 instructions to have an extra "cc" in disassembly, e.g. "jnz"
835 disassembled as "jccnz".
841 * Merged in John S. Fine's changes from his 0.98-J4 prerelease; see
842 http://www.csoft.net/cz/johnfine/
843 * Changed previous "spotless" Makefile target (appropriate for distribution)
844 to "distclean", and added "cleaner" target which is same as "clean"
845 except deletes files generated by Perl scripts; "spotless" is union.
846 * Removed BASIC programs from distribution. Get a Perl interpreter
848 * Calling this "pre-release 3.2" rather than "p3-hpa2" because of
849 John's contributions.
850 * Actually link in the IEEE output format (zoutieee.c); fix a bunch of
851 compiler warnings in that file. Note I don't know what IEEE output
852 is supposed to look like, so these changes were made "blind".
858 * Merged nasm098p3.zip with nasm-0.97.tar.gz to create a fully
859 buildable version for Unix systems (Makefile.in updates, etc.)
860 * Changed insns.pl to create the instruction tables in nasm.h and
861 names.c, so that a new instruction can be added by adding it *only*
863 * Added the following new instructions: SYSENTER, SYSEXIT, FXSAVE,
864 FXRSTOR, UD1, UD2 (the latter two are two opcodes that Intel
865 guarantee will never be used; one of them is documented as UD2 in
866 Intel documentation, the other one just as "Undefined Opcode" --
867 calling it UD1 seemed to make sense.)
868 * MAX_SYMBOL was defined to be 9, but LOADALL286 and LOADALL386 are 10
869 characters long. Now MAX_SYMBOL is derived from insns.dat.
870 * A note on the BASIC programs included: forget them. insns.bas is
871 already out of date. Get yourself a Perl interpreter for your
872 platform of choice at:
874 http://www.cpan.org/ports/index.html
880 added response file support, improved command line handling, new layout
883 fixed limit checking bug, 'OUT byte nn, reg' bug, and a couple of rdoff
884 related bugs, updated Wishlist; 0.98 Prerelease 3.
890 fixed bug in outcoff.c to do with truncating section names longer
891 than 8 characters, referencing beyond end of string; 0.98 pre-release 2
894 0.98 pre-released May 1999
895 --------------------------
897 Fixed a bug whereby STRUC didn't work at all in RDF.
899 Fixed a problem with group specification in PUBDEFs in OBJ.
901 Improved ease of adding new output formats. Contribution due to
904 Fixed a bug in relocations in the `bin' format: was showing up when
905 a relocatable reference crossed an 8192-byte boundary in any output
908 Fixed a bug in local labels: local-label lookups were inconsistent
909 between passes one and two if an EQU occurred between the definition
910 of a global label and the subsequent use of a local label local to
913 Fixed a seg-fault in the preprocessor (again) which happened when
914 you use a blank line as the first line of a multi-line macro
915 definition and then defined a label on the same line as a call to
918 Fixed a stale-pointer bug in the handling of the NASM environment
919 variable. Thanks to Thomas McWilliams.
921 ELF had a hard limit on the number of sections which caused
922 segfaults when transgressed. Fixed.
924 Added ability for ndisasm to read from stdin by using `-' as the
927 ndisasm wasn't outputting the TO keyword. Fixed.
929 Fixed error cascade on bogus expression in %if - an error in
930 evaluation was causing the entire %if to be discarded, thus creating
931 trouble later when the %else or %endif was encountered.
933 Forward reference tracking was instruction-granular not operand-
934 granular, which was causing 286-specific code to be generated
935 needlessly on code of the form `shr word [forwardref],1'. Thanks to
936 Jim Hague for sending a patch.
938 All messages now appear on stdout, as sending them to stderr serves
939 no useful purpose other than to make redirection difficult.
941 Fixed the problem with EQUs pointing to an external symbol - this
942 now generates an error message.
944 Allowed multiple size prefixes to an operand, of which only the first
945 is taken into account.
947 Incorporated John Fine's changes, including fixes of a large number
948 of preprocessor bugs, some small problems in OBJ, and a reworking of
949 label handling to define labels before their line is assembled, rather
952 Reformatted a lot of the source code to be more readable. Included
953 'coding.txt' as a guideline for how to format code for contributors.
955 Stopped nested %reps causing a panic - they now cause a slightly more
956 friendly error message instead.
958 Fixed floating point constant problems (patch by Pedro Gimeno)
960 Fixed the return value of insn_size() not being checked for -1, indicating
963 Incorporated 3D now instructions.
965 Fixed the 'mov eax, eax + ebx' bug.
967 Fixed the GLOBAL EQU bug in ELF. Released developers release 3.
969 Incorporated John Fine's command line parsing changes
971 Incorporated David Lindauer's OMF debug support
973 Made changes for LCC 4.0 support (__NASM_CDecl__, removed register size
974 specification warning when sizes agree).
976 Released NASM 0.98 Pre-release 1
979 0.97 released December 1997
980 ---------------------------
982 This was entirely a bug-fix release to 0.96, which seems to have got
985 Fixed stupid mistake in OBJ which caused `MOV EAX,<constant>' to
986 fail. Caused by an error in the `MOV EAX,<segment>' support.
988 ndisasm hung at EOF when compiled with lcc on Linux because lcc on
989 Linux somehow breaks feof(). ndisasm now does not rely on feof().
991 A heading in the documentation was missing due to a markup error in
994 Fixed failure to update all pointers on realloc() within extended-
995 operand code in parser.c. Was causing wrong behaviour and seg faults
996 on lines such as `dd 0.0,0.0,0.0,0.0,...'
998 Fixed a subtle preprocessor bug whereby invoking one multi-line
999 macro on the first line of the expansion of another, when the second
1000 had been invoked with a label defined before it, didn't expand the
1003 Added internal.doc back in to the distribution archives - it was
1004 missing in 0.96 *blush*
1006 Fixed bug causing 0.96 to be unable to assemble its own test files,
1007 specifically objtest.asm. *blush again*
1009 Fixed seg-faults and bogus error messages caused by mismatching
1010 %rep and %endrep within multi-line macro definitions.
1012 Fixed a problem with buffer overrun in OBJ, which was causing
1013 corruption at ends of long PUBDEF records.
1015 Separated DOS archives into main-program and documentation to reduce
1019 0.96 released November 1997
1020 ---------------------------
1022 Fixed a bug whereby, if `nasm sourcefile' would cause a filename
1023 collision warning and put output into `nasm.out', then `nasm
1024 sourcefile -o outputfile' still gave the warning even though the
1027 Fixed name pollution under Digital UNIX: one of its header files
1028 defined R_SP, which broke the enum in nasm.h.
1030 Fixed minor instruction table problems: FUCOM and FUCOMP didn't have
1031 two-operand forms; NDISASM didn't recognise the longer register
1032 forms of PUSH and POP (eg FF F3 for PUSH BX); TEST mem,imm32 was
1033 flagged as undocumented; the 32-bit forms of CMOV had 16-bit operand
1034 size prefixes; `AAD imm' and `AAM imm' are no longer flagged as
1035 undocumented because the Intel Architecture reference documents
1038 Fixed a problem with the local-label mechanism, whereby strange
1039 types of symbol (EQUs, auto-defined OBJ segment base symbols)
1040 interfered with the `previous global label' value and screwed up
1043 Fixed a bug whereby the stub preprocessor didn't communicate with
1044 the listing file generator, so that the -a and -l options in
1045 conjunction would produce a useless listing file.
1047 Merged `os2' object file format back into `obj', after discovering
1048 that `obj' _also_ shouldn't have a link pass separator in a module
1049 containing a non-trivial MODEND. Flat segments are now declared
1050 using the FLAT attribute. `os2' is no longer a valid object format
1053 Removed the fixed-size temporary storage in the evaluator. Very very
1054 long expressions (like `mov ax,1+1+1+1+...' for two hundred 1s or
1055 so) should now no longer crash NASM.
1057 Fixed a bug involving segfaults on disassembly of MMX instructions,
1058 by changing the meaning of one of the operand-type flags in nasm.h.
1059 This may cause other apparently unrelated MMX problems; it needs to
1060 be tested thoroughly.
1062 Fixed some buffer overrun problems with large OBJ output files.
1063 Thanks to DJ Delorie for the bug report and fix.
1065 Made preprocess-only mode actually listen to the %line markers as it
1066 prints them, so that it can report errors more sanely.
1068 Re-designed the evaluator to keep more sensible track of expressions
1069 involving forward references: can now cope with previously-nightmare
1075 Added the ALIGN and ALIGNB standard macros.
1077 Added PIC support in ELF: use of WRT to obtain the four extra
1078 relocation types needed.
1080 Added the ability for output file formats to define their own
1081 extensions to the GLOBAL, COMMON and EXTERN directives.
1083 Implemented common-variable alignment, and global-symbol type and
1084 size declarations, in ELF.
1086 Implemented NEAR and FAR keywords for common variables, plus
1087 far-common element size specification, in OBJ.
1089 Added a feature whereby EXTERNs and COMMONs in OBJ can be given a
1090 default WRT specification (either a segment or a group).
1092 Transformed the Unix NASM archive into an auto-configuring package.
1094 Added a sanity-check for people applying SEG to things which are
1095 already segment bases: this previously went unnoticed by the SEG
1096 processing and caused OBJ-driver panics later.
1098 Added the ability, in OBJ format, to deal with `MOV EAX,<segment>'
1099 type references: OBJ doesn't directly support dword-size segment
1100 base fixups, but as long as the low two bytes of the constant term
1101 are zero, a word-size fixup can be generated instead and it will
1104 Added the ability to specify sections' alignment requirements in
1105 Win32 object files and pure binary files.
1107 Added preprocess-time expression evaluation: the %assign (and
1108 %iassign) directive and the bare %if (and %elif) conditional. Added
1109 relational operators to the evaluator, for use only in %if
1110 constructs: the standard relationals = < > <= >= <> (and C-like
1111 synonyms == and !=) plus low-precedence logical operators &&, ^^ and
1114 Added a preprocessor repeat construct: %rep / %exitrep / %endrep.
1116 Added the __FILE__ and __LINE__ standard macros.
1118 Added a sanity check for number constants being greater than
1119 0xFFFFFFFF. The warning can be disabled.
1121 Added the %0 token whereby a variadic multi-line macro can tell how
1122 many parameters it's been given in a specific invocation.
1124 Added %rotate, allowing multi-line macro parameters to be cycled.
1126 Added the `*' option for the maximum parameter count on multi-line
1127 macros, allowing them to take arbitrarily many parameters.
1129 Added the ability for the user-level forms of EXTERN, GLOBAL and
1130 COMMON to take more than one argument.
1132 Added the IMPORT and EXPORT directives in OBJ format, to deal with
1135 Added some more preprocessor %if constructs: %ifidn / %ifidni (exact
1136 textual identity), and %ifid / %ifnum / %ifstr (token type testing).
1138 Added the ability to distinguish SHL AX,1 (the 8086 version) from
1139 SHL AX,BYTE 1 (the 286-and-upwards version whose constant happens to
1142 Added NetBSD/FreeBSD/OpenBSD's variant of a.out format, complete
1143 with PIC shared library features.
1145 Changed NASM's idiosyncratic handling of FCLEX, FDISI, FENI, FINIT,
1146 FSAVE, FSTCW, FSTENV, and FSTSW to bring it into line with the
1147 otherwise accepted standard. The previous behaviour, though it was a
1148 deliberate feature, was a deliberate feature based on a
1149 misunderstanding. Apologies for the inconvenience.
1151 Improved the flexibility of ABSOLUTE: you can now give it an
1152 expression rather than being restricted to a constant, and it can
1153 take relocatable arguments as well.
1155 Added the ability for a variable to be declared as EXTERN multiple
1156 times, and the subsequent definitions are just ignored.
1158 We now allow instruction prefixes (CS, DS, LOCK, REPZ etc) to be
1159 alone on a line (without a following instruction).
1161 Improved sanity checks on whether the arguments to EXTERN, GLOBAL
1162 and COMMON are valid identifiers.
1164 Added misc/exebin.mac to allow direct generation of .EXE files by
1165 hacking up an EXE header using DB and DW; also added test/binexe.asm
1166 to demonstrate the use of this. Thanks to Yann Guidon for
1167 contributing the EXE header code.
1169 ndisasm forgot to check whether the input file had been successfully
1170 opened. Now it does. Doh!
1172 Added the Cyrix extensions to the MMX instruction set.
1174 Added a hinting mechanism to allow [EAX+EBX] and [EBX+EAX] to be
1175 assembled differently. This is important since [ESI+EBP] and
1176 [EBP+ESI] have different default base segment registers.
1178 Added support for the PharLap OMF extension for 4096-byte segment
1182 0.95 released July 1997
1183 -----------------------
1185 Fixed yet another ELF bug. This one manifested if the user relied on
1186 the default segment, and attempted to define global symbols without
1187 first explicitly declaring the target segment.
1189 Added makefiles (for NASM and the RDF tools) to build Win32 console
1190 apps under Symantec C++. Donated by Mark Junker.
1192 Added `macros.bas' and `insns.bas', QBasic versions of the Perl
1193 scripts that convert `standard.mac' to `macros.c' and convert
1194 `insns.dat' to `insnsa.c' and `insnsd.c'. Also thanks to Mark
1197 Changed the diassembled forms of the conditional instructions so
1198 that JB is now emitted as JC, and other similar changes. Suggested
1199 list by Ulrich Doewich.
1201 Added `@' to the list of valid characters to begin an identifier
1204 Documentary changes, notably the addition of the `Common Problems'
1205 section in nasm.doc.
1207 Fixed a bug relating to 32-bit PC-relative fixups in OBJ.
1209 Fixed a bug in perm_copy() in labels.c which was causing exceptions
1210 in cleanup_labels() on some systems.
1212 Positivity sanity check in TIMES argument changed from a warning to
1213 an error following a further complaint.
1215 Changed the acceptable limits on byte and word operands to allow
1216 things like `~10111001b' to work.
1218 Fixed a major problem in the preprocessor which caused seg-faults if
1219 macro definitions contained blank lines or comment-only lines.
1221 Fixed inadequate error checking on the commas separating the
1222 arguments to `db', `dw' etc.
1224 Fixed a crippling bug in the handling of macros with operand counts
1225 defined with a `+' modifier.
1227 Fixed a bug whereby object file formats which stored the input file
1228 name in the output file (such as OBJ and COFF) weren't doing so
1229 correctly when the output file name was specified on the command
1232 Removed [INC] and [INCLUDE] support for good, since they were
1235 Fixed a bug in OBJ which caused all fixups to be output in 16-bit
1236 (old-format) FIXUPP records, rather than putting the 32-bit ones in
1237 FIXUPP32 (new-format) records.
1239 Added, tentatively, OS/2 object file support (as a minor variant on
1242 Updates to Fox Cutter's Borland C makefile, Makefile.bc2.
1244 Removed a spurious second fclose() on the output file.
1246 Added the `-s' command line option to redirect all messages which
1247 would go to stderr (errors, help text) to stdout instead.
1249 Added the `-w' command line option to selectively suppress some
1250 classes of assembly warning messages.
1252 Added the `-p' pre-include and `-d' pre-define command-line options.
1254 Added an include file search path: the `-i' command line option.
1256 Fixed a silly little preprocessor bug whereby starting a line with a
1257 `%!' environment-variable reference caused an `unknown directive'
1260 Added the long-awaited listing file support: the `-l' command line
1263 Fixed a problem with OBJ format whereby, in the absence of any
1264 explicit segment definition, non-global symbols declared in the
1265 implicit default segment generated spurious EXTDEF records in the
1268 Added the NASM environment variable.
1270 From this version forward, Win32 console-mode binaries will be
1271 included in the DOS distribution in addition to the 16-bit binaries.
1272 Added Makefile.vc for this purpose.
1274 Added `return 0;' to test/objlink.c to prevent compiler warnings.
1276 Added the __NASM_MAJOR__ and __NASM_MINOR__ standard defines.
1278 Added an alternative memory-reference syntax in which prefixing an
1279 operand with `&' is equivalent to enclosing it in square brackets,
1280 at the request of Fox Cutter.
1282 Errors in pass two now cause the program to return a non-zero error
1283 code, which they didn't before.
1285 Fixed the single-line macro cycle detection, which didn't work at
1286 all on macros with no parameters (caused an infinite loop). Also
1287 changed the behaviour of single-line macro cycle detection to work
1288 like cpp, so that macros like `extrn' as given in the documentation
1291 Fixed the implementation of WRT, which was too restrictive in that
1292 you couldn't do `mov ax,[di+abc wrt dgroup]' because (di+abc) wasn't
1293 a relocatable reference.
1296 0.94 released April 1997
1297 ------------------------
1299 Major item: added the macro processor.
1301 Added undocumented instructions SMI, IBTS, XBTS and LOADALL286. Also
1302 reorganised CMPXCHG instruction into early-486 and Pentium forms.
1303 Thanks to Thobias Jones for the information.
1305 Fixed two more stupid bugs in ELF, which were causing `ld' to
1306 continue to seg-fault in a lot of non-trivial cases.
1308 Fixed a seg-fault in the label manager.
1310 Stopped FBLD and FBSTP from _requiring_ the TWORD keyword, which is
1311 the only option for BCD loads/stores in any case.
1313 Ensured FLDCW, FSTCW and FSTSW can cope with the WORD keyword, if
1314 anyone bothers to provide it. Previously they complained unless no
1315 keyword at all was present.
1317 Some forms of FDIV/FDIVR and FSUB/FSUBR were still inverted: a
1318 vestige of a bug that I thought had been fixed in 0.92. This was
1319 fixed, hopefully for good this time...
1321 Another minor phase error (insofar as a phase error can _ever_ be
1322 minor) fixed, this one occurring in code of the form
1323 rol ax,forward_reference
1324 forward_reference equ 1
1326 The number supplied to TIMES is now sanity-checked for positivity,
1327 and also may be greater than 64K (which previously didn't work on
1330 Added Watcom C makefiles, and misc/pmw.bat, donated by Dominik Behr.
1332 Added the INCBIN pseudo-opcode.
1334 Due to the advent of the preprocessor, the [INCLUDE] and [INC]
1335 directives have become obsolete. They are still supported in this
1336 version, with a warning, but won't be in the next.
1338 Fixed a bug in OBJ format, which caused incorrect object records to
1339 be output when absolute labels were made global.
1341 Updates to RDOFF subdirectory, and changes to outrdf.c.
1344 0.93 released January 1997
1345 --------------------------
1347 This release went out in a great hurry after semi-crippling bugs
1350 Really _did_ fix the stack overflows this time. *blush*
1352 Had problems with EA instruction sizes changing between passes, when
1353 an offset contained a forward reference and so 4 bytes were
1354 allocated for the offset in pass one; by pass two the symbol had
1355 been defined and happened to be a small absolute value, so only 1
1356 byte got allocated, causing instruction size mismatch between passes
1357 and hence incorrect address calculations. Fixed.
1359 Stupid bug in the revised ELF section generation fixed (associated
1360 string-table section for .symtab was hard-coded as 7, even when this
1361 didn't fit with the real section table). Was causing `ld' to
1362 seg-fault under Linux.
1364 Included a new Borland C makefile, Makefile.bc2, donated by Fox
1365 Cutter <lmb@comtch.iea.com>.
1368 0.92 released January 1997
1369 --------------------------
1371 The FDIVP/FDIVRP and FSUBP/FSUBRP pairs had been inverted: this was
1372 fixed. This also affected the LCC driver.
1374 Fixed a bug regarding 32-bit effective addresses of the form
1375 [other_register+ESP].
1377 Documentary changes, notably documentation of the fact that Borland
1378 Win32 compilers use `obj' rather than `win32' object format.
1380 Fixed the COMENT record in OBJ files, which was formatted
1383 Fixed a bug causing segfaults in large RDF files.
1385 OBJ format now strips initial periods from segment and group
1386 definitions, in order to avoid complications with the local label
1389 Fixed a bug in disassembling far calls and jumps in NDISASM.
1391 Added support for user-defined sections in COFF and ELF files.
1393 Compiled the DOS binaries with a sensible amount of stack, to
1394 prevent stack overflows on any arithmetic expression containing
1397 Fixed a bug in handling of files that do not terminate in a newline.
1400 0.91 released November 1996
1401 ---------------------------
1404 Support for RDF added.
1405 Support for DBG debugging format added.
1406 Support for 32-bit extensions to Microsoft OBJ format added.
1407 Revised for Borland C: some variable names changed, makefile added.
1408 LCC support revised to actually work.
1409 JMP/CALL NEAR/FAR notation added.
1410 `a16', `o16', `a32' and `o32' prefixes added.
1411 Range checking on short jumps implemented.
1412 MMX instruction support added.
1413 Negative floating point constant support added.
1414 Memory handling improved to bypass 64K barrier under DOS.
1415 $ prefix to force treatment of reserved words as identifiers added.
1416 Default-size mechanism for object formats added.
1417 Compile-time configurability added.
1418 `#', `@', `~' and `?' are now valid characters in labels.
1419 `-e' and `-k' options in NDISASM added.
1422 0.90 released October 1996
1423 --------------------------
1425 First release version. First support for object file output. Other
1426 changes from previous version (0.3x) too numerous to document.