3 * Additional fixes for MMX operands with explicit "qword", as well as
4 (hopefully) SSE operands with "oword".
5 * Fix handling of truncated strings with DO.
6 * Fix segfaults due to memory overwrites when floating-point constants
8 * Fix segfaults due to missing include files.
9 * Fix OpenWatcom Makefiles for DOS and OS/2.
10 * Add autogenerated instruction list back into the documentation.
11 * ELF: Fix segfault when generating stabs, and no symbols have been
13 * ELF: Experimental support for DWARF debugging information.
14 * New compile date and time standard macros.
15 * %ifnum now returns true for negative numbers.
16 * Add support for the XSAVE instruction group.
17 * Makefile for Netware/gcc.
18 * Fix issue with some warnings getting emitted way too many times.
19 * Autogenerated instruction list added to the documentation.
23 * Fix the handling of MMX registers with explicit "qword" tags on
24 memory (broken in 2.00 due to 64-bit changes.)
25 * Fix the PREFETCH instructions.
26 * Fix the documentation.
27 * Fix debugging info when using "-f elf" (backwards alias for "-f
29 * Man pages for rdoff tools (from the Debian project.)
30 * ELF: handle large numbers of sections.
31 * Fix corrupt output when the optimizer runs out of passes.
35 * Added c99 data-type compliance.
36 * Added general x86-64 support.
37 * Added win64 (x86-64 COFF) output format.
38 * Added __BITS__ standard macro.
39 * Renamed the elf output format to elf32 for clarity.
40 * Added elf64 and macho (MacOS X) output formats.
41 * Added Numeric constants in DQ directive.
42 * Added oword, do and reso pseudo operands.
43 * Allow underscores in numbers.
44 * Added 8-, 16- and 128-bit floating-point formats.
45 * Added binary, octal and hexadecimal floating-point.
46 * Correct the generation of floating-point constants.
47 * Added Floating-point option control.
48 * Added Infinity and NaN floating point support.
49 * Added ELF Symbol Visibility support.
50 * Added Setting OSABI value in ELF header directive.
51 * Added Generate Makefile Dependencies option.
52 * Added Unlimited Optimization Passes option.
53 * Added %IFN and %ELIFN support.
54 * Added Logical Negation Operator.
55 * Enhanced Stack Relative Preprocessor Directives.
56 * Enhanced ELF Debug Formats.
57 * Enhanced Send Errors to a File option.
58 * Added SSSE3, SSE4.1, SSE4.2, SSE5 support.
59 * Added a large number of additional instructions.
60 * Significant performance improvements.
65 * fix outas86's .bss handling
66 * "make spotless" no longer deletes config.h.in.
67 * %(el)if(n)idn insensitivity to string quotes difference (#809300).
68 * (nasm.c) __OUTPUT_FORMAT__ changed to string value instead of symbol.
72 * Add Makefile for 16-bit DOS binaries under OpenWatcom, and modify
73 mkdep.pl to be able to generate completely pathless dependencies, as
74 required by OpenWatcom wmake (it supports path searches, but not
76 * Fix the STR instruction.
77 * Fix the ELF output format, which was broken under certain
78 circumstances due to the addition of stabs support.
79 * Quick-fix Borland format debug-info for -f obj
80 * Fix for %rep with no arguments (#560568)
81 * Fix concatenation of preprocessor function call (#794686)
82 * Fix long label causes coredump (#677841)
83 * Use autoheader as well as autoconf to keep configure from generating
84 ridiculously long command lines.
85 * Make sure that all of the formats which support debugging output
86 actually will suppress debugging output when -g not specified.
90 * Paths given in "-I" switch searched for "incbin"ed as
91 well as "%include"ed files.
92 * Added stabs debugging for the ELF output format, patch from
94 * Fix output/outbin.c to allow origin > 80000000h.
95 * Make -U switch work.
96 * Fix the use of relative offsets with explicit prefixes, e.g. "a32 loop foo".
97 * Remove "backslash()".
98 * Fix the SMSW and SLDT instructions.
99 * -O2 and -O3 are no longer aliases for -O10 and -O15. If you mean the
100 latter, please say so! :)
104 * Update rdoff - librarian/archiver - common rec - docs!
105 * Fix signed/unsigned problems.
106 * Fix JMP FAR label and CALL FAR label.
107 * Add new multisection support - map files - fix align bug
108 * Fix sysexit, movhps/movlps reg,reg bugs in insns.dat
109 * "Q" or "O" suffixes indicate octal
110 * Support Prescott new instructions (PNI).
111 * Cyrix XSTORE instruction.
115 * Fix build failure on 16-bit DOS (Makefile.bc3 workaround for compiler bug.)
116 * Fix dependencies and compiler warnings.
117 * Add "const" in a number of places.
118 * Add -X option to specify error reporting format (use -Xvc to
119 integrate with Microsoft Visual Studio.)
120 * Minor changes for code legibility.
121 * Drop use of tmpnam() in rdoff (security fix.)
125 * Correct additional address-size vs. operand-size confusions.
126 * Generate dependencies for all Makefiles automatically.
127 * Add support for unimplemented (but theoretically available)
128 registers such as tr0 and cr5. Segment registers 6 and 7 are called
129 segr6 and segr7 for the operations which they can be represented.
130 * Correct some disassembler bugs related to redundant address-size prefixes.
131 Some work still remains in this area.
132 * Correctly generate an error for things like "SEG eax".
133 * Add the JMPE instruction, enabled by "CPU IA64".
134 * Correct compilation on newer gcc/glibc platforms.
135 * Issue an error on things like "jmp far eax".
141 * New __NASM_PATCHLEVEL__ and __NASM_VERSION_ID__ standard macros to
142 round out the version-query macros. version.pl now understands
143 X.YYplWW or X.YY.ZZplWW as a version number, equivalent to
144 X.YY.ZZ.WW (or X.YY.0.WW, as appropriate).
145 * New keyword "strict" to disable the optimization of specific
147 * Fix the handing of size overrides with JMP instructions
148 (instructions such as "jmp dword foo".)
149 * Fix the handling of "ABSOLUTE label", where "label" points into a
151 * Fix OBJ output format with lots of externs.
152 * More documentation updates.
153 * Add -Ov option to get verbose information about optimizations.
154 * Undo a braindead change which broke %elif directives.
161 * Fix NASM crashing when %macro directives were left unterminated.
162 * Lots of documentation updates.
163 * Complete rewrite of the PostScript/PDF documentation generator.
164 * The MS Visual C++ Makefile was updated and corrected.
165 * Recognize .rodata as a standard section name in ELF.
166 * Fix some obsolete Perl4-isms in Perl scripts.
167 * Fix configure.in to work with autoconf 2.5x.
168 * Fix a couple of "make cleaner" misses.
169 * Make the normal "./configure && make" work with Cygwin.
175 * Correctly build in a separate object directory again.
176 * Derive all references to the version number from the version file.
177 * New standard macros __NASM_SUBMINOR__ and __NASM_VER__ macros.
178 * Lots of Makefile updates and bug fixes.
179 * New %ifmacro directive to test for multiline macros.
180 * Documentation updates.
181 * Fixes for 16-bit OBJ format output.
182 * Changed the NASM environment variable to NASMENV.
188 * Changed doc files a lot: completely removed old READMExx and
189 Wishlist files, incorporating all information in CHANGES and TODO.
190 * I waited a long time to rename zoutieee.c to (original) outieee.c
191 * moved all output modules to output/ subdirectory.
192 * Added 'make strip' target to strip debug info from nasm & ndisasm.
193 * Added INSTALL file with installation instructions.
194 * Added -v option description to nasm man.
195 * Added dist makefile target to produce source distributions.
196 * 16-bit support for ELF output format (GNU extension, but useful.)
202 * Fastcooked this for Debian's Woody release:
203 Frank applied the INCBIN bug patch to 0.98.25alt and called
204 it 0.98.28 to not confuse poor little apt-get.
210 * Reorganised files even better from 0.98.25alt
216 * Prettified the source tree. Moved files to more reasonable places.
217 * Added findleak.pl script to misc/ directory.
218 * Attempted to fix doc.
223 * Line continuation character '\'
224 * Docs inadvertantly reverted - "dos packaging".
230 * FIXME: Someone, document this please.
236 * Documentation - Ndisasm doc added to Nasm.doc.
242 * Attempted to remove rdoff version1
243 * Lino Mastrodomenico's patches to preproc.c (%$$ bug?).
249 * Update rdoff2 - attempt to remove v1.
255 * Optimization fixes.
261 * Optimization fixes.
267 * H. J. Lu's patch back out.
273 * Added ".rdata" to "-f win32".
279 * H. J. Lu's "bogus elf" patch. (Red Hat problem?)
285 * Fix whitespace before "[section ..." bug.
291 * Fix fixes to memory leaks.
297 * (there was no '.13)
302 * Update optimization (new function of "-O1")
303 * Changes to test/bintest.asm (?).
308 * Optimization changes.
310 * (there was no '.10)
315 * Add multiple sections support to "-f bin".
316 * Changed GLOBAL_TEMP_BASE in outelf.c from 6 to 15.
317 * Add "-v" as an alias to the "-r" switch.
318 * Remove "#ifdef" from Tasm compatibility options.
319 * Remove redundant size-overrides on "mov ds, ex", etc.
320 * Fixes to SSE2, other insns.dat (?).
321 * Enable uppercase "I" and "P" switches.
322 * Case insinsitive "seg" and "wrt".
323 * Update install.sh (?).
324 * Allocate tokens in blocks.
325 * Improve "invalid effective address" messages.
330 * Add "%strlen" and "%substr" macro operators
331 * Fixed broken c16.mac.
332 * Unterminated string error reported.
333 * Fixed bugs as per 0.98bf
336 0.98.09b with John Coffman patches released 28-Oct-2001
337 -------------------------------------------------------
339 Changes from 0.98.07 release to 98.09b as of 28-Oct-2001
341 * More closely compatible with 0.98 when -O0 is implied
342 or specified. Not strictly identical, since backward
343 branches in range of short offsets are recognized, and signed
344 byte values with no explicit size specification will be
345 assembled as a single byte.
347 * More forgiving with the PUSH instruction. 0.98 requires
348 a size to be specified always. 0.98.09b will imply the size
349 from the current BITS setting (16 or 32).
351 * Changed definition of the optimization flag:
353 -O0 strict two-pass assembly, JMP and Jcc are
354 handled more like 0.98, except that back-
355 ward JMPs are short, if possible.
357 -O1 strict two-pass assembly, but forward
358 branches are assembled with code guaranteed
359 to reach; may produce larger code than
360 -O0, but will produce successful assembly
361 more often if branch offset sizes are not
364 -O2 multi-pass optimization, minimize branch
365 offsets; also will minimize signed immed-
366 iate bytes, overriding size specification.
368 -O3 like -O2, but more passes taken, if needed
371 0.98.07 released 01/28/01
372 -------------------------
374 * Added Stepane Denis' SSE2 instructions to a *working*
375 version of the code - some earlier versions were based on
376 broken code - sorry 'bout that. version "0.98.07"
382 * Cosmetic modifications to nasm.c, nasm.h,
386 0.98.06f released 01/18/01
387 --------------------------
389 * - Add "metalbrain"s jecxz bug fix in insns.dat
390 - alter nasmdoc.src to match - version "0.98.06f"
393 0.98.06e released 01/09/01
394 --------------------------
396 * Removed the "outforms.h" file - it appears to be
397 someone's old backup of "outform.h". version "0.98.06e"
403 * fbk - finally added the fix for the "multiple %includes bug",
404 known since 7/27/99 - reported originally (?) and sent to
405 us by Austin Lunnen - he reports that John Fine had a fix
406 within the day. Here it is...
408 * Nelson Rush resigns from the group. Big thanks to Nelson for
409 his leadership and enthusiasm in getting these changes
410 incorporated into Nasm!
412 * fbk - [list +], [list -] directives - ineptly implemented, should
413 be re-written or removed, perhaps.
415 * Brian Raiter / fbk - "elfso bug" fix - applied to aoutb format
416 as well - testing might be desirable...
422 * James Seter - -postfix, -prefix command line switches.
423 * Yuri Zaporogets - rdoff utility changes.
429 * GAS-like palign (Panos Minos)
430 * FIXME: Someone, fill this in with details
434 ----------------------------------
436 * Fixed - elf and aoutb bug - shared libraries
437 - multiple "%include" bug in "-f obj"
439 - unrecognized option bug in ndisasm
441 0.98.03 with John Coffman's changes released 27-Jul-2000
442 --------------------------------------------------------
444 * Added signed byte optimizations for the 0x81/0x83 class
445 of instructions: ADC, ADD, AND, CMP, OR, SBB, SUB, XOR:
446 when used as 'ADD reg16,imm' or 'ADD reg32,imm.' Also
447 optimization of signed byte form of 'PUSH imm' and 'IMUL
448 reg,imm'/'IMUL reg,reg,imm.' No size specification is needed.
450 * Added multi-pass JMP and Jcc offset optimization. Offsets
451 on forward references will preferentially use the short form,
452 without the need to code a specific size (short or near) for
453 the branch. Added instructions for 'Jcc label' to use the
454 form 'Jnotcc $+3/JMP label', in cases where a short offset
455 is out of bounds. If compiling for a 386 or higher CPU, then
456 the 386 form of Jcc will be used instead.
458 This feature is controlled by a new command-line switch: "O",
459 (upper case letter O). "-O0" reverts the assembler to no
460 extra optimization passes, "-O1" allows up to 5 extra passes,
461 and "-O2"(default), allows up to 10 extra optimization passes.
463 * Added a new directive: 'cpu XXX', where XXX is any of:
464 8086, 186, 286, 386, 486, 586, pentium, 686, PPro, P2, P3 or
465 Katmai. All are case insensitive. All instructions will
466 be selected only if they apply to the selected cpu or lower.
467 Corrected a couple of bugs in cpu-dependence in 'insns.dat'.
469 * Added to 'standard.mac', the "use16" and "use32" forms of
470 the "bits 16/32" directive. This is nothing new, just conforms
471 to a lot of other assemblers. (minor)
473 * Changed label allocation from 320/32 (10000 labels @ 200K+)
474 to 32/37 (1000 labels); makes running under DOS much easier.
475 Since additional label space is allocated dynamically, this
476 should have no effect on large programs with lots of labels.
477 The 37 is a prime, believed to be better for hashing. (minor)
479 * Integrated patchfile 0.98-0.98.01. I call this version
480 0.98.03, for historical reasons: 0.98.02 was trashed.
482 --John Coffman <johninsd@san.rr.com> 27-Jul-2000
485 Kendall Bennett's SciTech MGL changes
486 -------------------------------------
487 Note that you must define "TASM_COMPAT" at compile-time
488 to get the Tasm Ideal Mode compatibility.
490 All changes can be compiled in and out using the TASM_COMPAT macros,
491 and when compiled without TASM_COMPAT defined we get the exact same
492 binary as the unmodified 0.98 sources.
494 standard.mac, macros.c:
495 . Added macros to ignore TASM directives before first include
498 . Added extern declaration for tasm_compatible_mode
501 . Added global variable tasm_compatible_mode
502 . Added command line switch for TASM compatible mode (-t)
503 . Changed version command line to reflect when compiled with TASM additions
504 . Added response file processing to allow all arguments on a single
505 line (response file is @resp rather than -@resp for NASM format).
508 . Changes islocal() macro to support TASM style @@local labels.
509 . Added islocalchar() macro to support TASM style @@local labels.
512 . Added support for TASM style memory references (ie: mov [DWORD eax],10
513 rather than the NASM style mov DWORD [eax],10).
516 . Added new directives, %arg, %local, %stacksize to directives table
517 . Added support for TASM style directives without a leading % symbol.
519 Integrated a block of changes from Andrew Zabolotny <bit@eltech.ru>:
521 * A new keyword %xdefine and its case-insensitive counterpart %ixdefine.
522 They work almost the same way as %define and %idefine but expand
523 the definition immediately, not on the invocation. Something like a cross
524 between %define and %assign. The "x" suffix stands for "eXpand", so
525 "xdefine" can be deciphered as "expand-and-define". Thus you can do
531 %xdefine %1 dword [esp+ofs]
535 * Changed the place where the expansion of %$name macros are expanded.
536 Now they are converted into ..@ctxnum.name form when detokenizing, so
537 there are no quirks as before when using %$name arguments to macros,
538 in macros etc. For example:
547 Now last line will be expanded into "hello" as expected. This also allows
548 for lots of goodies, a good example are extended "proc" macros included
551 * Added a check for "cstk" in smacro_defined() before calling get_ctx() -
552 this allows for things like:
557 to work without warnings even in no context.
559 * Added a check for "cstk" in %if*ctx and %elif*ctx directives -
560 this allows to use %ifctx without excessive warnings. If there is
561 no active context, %ifctx goes through "false" branch.
563 * Removed "user error: " prefix with %error directive: it just clobbers the
564 output and has absolutely no functionality. Besides, this allows to write
565 macros that does not differ from built-in functions in any way.
567 * Added expansion of string that is output by %error directive. Now you
570 %define hello(x) Hello, x!
573 %error "hello(%$name)"
575 Same happened with %include directive.
577 * Now all directives that expect an identifier will try to expand and
578 concatenate everything without whitespaces in between before usage.
579 For example, with "unfixed" nasm the commands
582 %define __%$abc goodbye
585 would produce "incorrect" output: last line will expand to
589 Not quite what you expected, eh? :-) The answer is that preprocessor
590 treats the %define construct as if it would be
592 %define __ %$abc goodbye
594 (note the white space between __ and %$abc). After my "fix" it
595 will "correctly" expand into
599 as expected. Note that I use quotes around words "correct", "incorrect"
600 etc because this is rather a feature not a bug; however current behaviour
601 is more logical (and allows more advanced macro usage :-).
603 Same change was applied to:
604 %push,%macro,%imacro,%define,%idefine,%xdefine,%ixdefine,
605 %assign,%iassign,%undef
607 * A new directive [WARNING {+|-}warning-id] have been added. It works only
608 if the assembly phase is enabled (i.e. it doesn't work with nasm -e).
610 * A new warning type: macro-selfref. By default this warning is disabled;
611 when enabled NASM warns when a macro self-references itself; for example
612 the following source:
614 [WARNING macro-selfref]
625 will produce a warning, but if we remove the first line we won't see it
626 anymore (which is The Right Thing To Do {tm} IMHO since C preprocessor
627 eats such constructs without warnings at all).
629 * Added a "error" routine to preprocessor which always will set ERR_PASS1
630 bit in severity_code. This removes annoying repeated errors on first
631 and second passes from preprocessor.
633 * Added the %+ operator in single-line macros for concatenating two
634 identifiers. Usage example:
636 %define _myfunc _otherfunc
637 %define cextern(x) _ %+ x
640 After first expansion, third line will become "_myfunc". After this
641 expansion is performed again so it becomes "_otherunc".
643 * Now if preprocessor is in a non-emmitting state, no warning or error
644 will be emmitted. Example:
649 put anything you want between these two brackets,
650 even macro-parameter references %1 or local labels %$zz
651 or macro-local labels %%zz - no warning will be emmitted.
654 * Context-local variables on expansion as a last resort are looked up
655 in outer contexts. For example, the following piece:
665 will expand correctly the fourth line to [esp]; if we'll define another
666 %$a inside the "inner" context, it will take precedence over outer
667 definition. However, this modification has been applied only to
668 expand_smacro and not to smacro_define: as a consequence expansion
669 looks in outer contexts, but %ifdef won't look in outer contexts.
671 This behaviour is needed because we don't want nested contexts to
672 act on already defined local macros. Example:
674 %define %$arg1 [esp+4]
680 In this example the "if" mmacro enters into the "if" context, so %$arg1
681 is not valid anymore inside "if". Of course it could be worked around
682 by using explicitely %$$arg1 but this is ugly IMHO.
684 * Fixed memory leak in %undef. The origline wasn't freed before
687 * Fixed trap in preprocessor when line expanded to empty set of tokens.
688 This happens, for example, in the following case:
697 All changes since NASM 0.98p3 have been produced by H. Peter Anvin <hpa@zytor.com>.
699 * The documentation comment delimiter is \# not #.
700 * Allow EQU definitions to refer to external labels; reported by
702 * Re-enable support for RDOFF v1; reported by Pedro Gimeno.
703 * Updated License file per OK from Simon and Julian.
709 * Update documentation (although the instruction set reference will
710 have to wait; I don't want to hold up the 0.98 release for it.)
711 * Verified that the NASM implementation of the PEXTRW and PMOVMSKB
712 instructions is correct. The encoding differs from what the Intel
713 manuals document, but the Pentium III behaviour matches NASM, not
715 * Fix handling of implicit sizes in PSHUFW and PINSRW, reported by
717 * Resurrect the -s option, which was removed when changing the
718 diagnostic output to stdout.
724 * Fix for "DB" when NASM is running on a bigendian machine.
725 * Invoke insns.pl once for each output script, making Makefile.in
727 * Improve the Unix configure-based makefiles to make package
729 * Included an RPM .spec file for building RPM (RedHat Package Manager)
730 packages on Linux or Unix systems.
731 * Fix Makefile dependency problems.
732 * Change src/rdsrc.pl to include sectioning information in info
733 output; required for install-info to work.
734 * Updated the RDOFF distribution to version 2 from Jules; minor
735 massaging to make it compile in my environment.
736 * Split doc files that can be built by anyone with a Perl interpreter off
737 into a separate archive.
738 * "Dress rehearsal" release!
744 * Fixed opcodes with a third byte-sized immediate argument to not
745 complain if given "byte" on the immediate.
746 * Allow %undef to remove single-line macros with arguments. This
747 matches the behaviour of #undef in the C preprocessor.
748 * Allow -d, -u, -i and -p to be specified as -D, -U, -I and -P for
749 compatibility with most C compilers and preprocessors. This allows
750 Makefile options to be shared between cc and nasm, for example.
752 * Went through the list of Katmai instructions and hopefully fixed the
753 (rather few) mistakes in it.
754 * (Hopefully) fixed a number of disassembler bugs related to ambiguous
755 instructions (disambiguated by -p) and SSE instructions with REP.
756 * Fix for bug reported by Mark Junger: "call dword 0x12345678" should
757 work and may add an OSP (affected CALL, JMP, Jcc).
758 * Fix for environments when "stderr" isn't a compile-time constant.
764 * Took officially over coordination of the 0.98 release; so drop
765 the p3.x notation. Skipped p4 and p5 to avoid confusion with John
766 Fine's J4 and J5 releases.
767 * Update the documentation; however, it still doesn't include
768 documentation for the various new instructions. I somehow wonder if
769 it makes sense to have an instruction set reference in the assembler
770 manual when Intel et al have PDF versions of their manuals online.
771 * Recognize "idt" or "centaur" for the -p option to ndisasm.
772 * Changed error messages back to stderr where they belong, but add an
773 -E option to redirect them elsewhere (the DOS shell cannot redirect
775 * -M option to generate Makefile dependencies (based on code from Alex
777 * %undef preprocessor directive, and -u option, that undefines a
779 * OS/2 Makefile (Mkfiles/Makefile.os2) for Borland under OS/2; from
781 * Various minor bugfixes (reported by):
782 - Dangling %s in preproc.c (Martin Junker)
783 * THERE ARE KNOWN BUGS IN SSE AND THE OTHER KATMAI INSTRUCTIONS. I am
784 on a trip and didn't bring the Katmai instruction reference, so I
785 can't work on them right now.
786 * Updated the License file per agreement with Simon and Jules to
787 include a GPL distribution clause.
793 * (Hopefully) fixed the canned Makefiles to include the outrdf2 and
795 * Renamed changes.asm to changed.asm.
801 * Fixed a bunch of instructions that were added in 0.98p3.5 which had
802 memory operands, and the address-size prefix was missing from the
809 * Merged in changes from John S. Fine's 0.98-J5 release. John's based
810 0.98-J5 on my 0.98p3.3 release; this merges the changes.
811 * Expanded the instructions flag field to a long so we can fit more
812 flags; mark SSE (KNI) and AMD or Katmai-specific instructions as
814 * Fix the "PRIV" flag on a bunch of instructions, and create new
815 "PROT" flag for protected-mode-only instructions (orthogonal to if
816 the instruction is privileged!) and new "SMM" flag for SMM-only
818 * Added AMD-only SYSCALL and SYSRET instructions.
819 * Make SSE actually work, and add new Katmai MMX instructions.
820 * Added a -p (preferred vendor) option to ndisasm so that it can
821 distinguish e.g. Cyrix opcodes also used in SSE. For example:
823 ndisasm -p cyrix aliased.bin
824 00000000 670F514310 paddsiw mm0,[ebx+0x10]
825 00000005 670F514320 paddsiw mm0,[ebx+0x20]
826 ndisasm -p intel aliased.bin
827 00000000 670F514310 sqrtps xmm0,[ebx+0x10]
828 00000005 670F514320 sqrtps xmm0,[ebx+0x20]
829 * Added a bunch of Cyrix-specific instructions.
835 * Made at least an attempt to modify all the additional Makefiles (in
836 the Mkfiles directory). I can't test it, but this was the best I
838 * DOS DJGPP+"Opus Make" Makefile from John S. Fine.
839 * changes.asm changes from John S. Fine.
845 * Patch from Conan Brink to allow nesting of %rep directives.
846 * If we're going to allow INT01 as an alias for INT1/ICEBP (one of
847 Jules 0.98p3 changes), then we should allow INT03 as an alias for INT3
849 * Updated changes.asm to include the latest changes.
850 * Tried to clean up the <CR>s that had snuck in from a DOS/Windows
851 environment into my Unix environment, and try to make sure than
852 DOS/Windows users get them back.
853 * We would silently generate broken tools if insns.dat wasn't sorted
854 properly. Change insns.pl so that the order doesn't matter.
855 * Fix bug in insns.pl (introduced by me) which would cause conditional
856 instructions to have an extra "cc" in disassembly, e.g. "jnz"
857 disassembled as "jccnz".
863 * Merged in John S. Fine's changes from his 0.98-J4 prerelease; see
864 http://www.csoft.net/cz/johnfine/
865 * Changed previous "spotless" Makefile target (appropriate for distribution)
866 to "distclean", and added "cleaner" target which is same as "clean"
867 except deletes files generated by Perl scripts; "spotless" is union.
868 * Removed BASIC programs from distribution. Get a Perl interpreter
870 * Calling this "pre-release 3.2" rather than "p3-hpa2" because of
871 John's contributions.
872 * Actually link in the IEEE output format (zoutieee.c); fix a bunch of
873 compiler warnings in that file. Note I don't know what IEEE output
874 is supposed to look like, so these changes were made "blind".
880 * Merged nasm098p3.zip with nasm-0.97.tar.gz to create a fully
881 buildable version for Unix systems (Makefile.in updates, etc.)
882 * Changed insns.pl to create the instruction tables in nasm.h and
883 names.c, so that a new instruction can be added by adding it *only*
885 * Added the following new instructions: SYSENTER, SYSEXIT, FXSAVE,
886 FXRSTOR, UD1, UD2 (the latter two are two opcodes that Intel
887 guarantee will never be used; one of them is documented as UD2 in
888 Intel documentation, the other one just as "Undefined Opcode" --
889 calling it UD1 seemed to make sense.)
890 * MAX_SYMBOL was defined to be 9, but LOADALL286 and LOADALL386 are 10
891 characters long. Now MAX_SYMBOL is derived from insns.dat.
892 * A note on the BASIC programs included: forget them. insns.bas is
893 already out of date. Get yourself a Perl interpreter for your
894 platform of choice at:
896 http://www.cpan.org/ports/index.html
902 added response file support, improved command line handling, new layout
905 fixed limit checking bug, 'OUT byte nn, reg' bug, and a couple of rdoff
906 related bugs, updated Wishlist; 0.98 Prerelease 3.
912 fixed bug in outcoff.c to do with truncating section names longer
913 than 8 characters, referencing beyond end of string; 0.98 pre-release 2
916 0.98 pre-released May 1999
917 --------------------------
919 Fixed a bug whereby STRUC didn't work at all in RDF.
921 Fixed a problem with group specification in PUBDEFs in OBJ.
923 Improved ease of adding new output formats. Contribution due to
926 Fixed a bug in relocations in the `bin' format: was showing up when
927 a relocatable reference crossed an 8192-byte boundary in any output
930 Fixed a bug in local labels: local-label lookups were inconsistent
931 between passes one and two if an EQU occurred between the definition
932 of a global label and the subsequent use of a local label local to
935 Fixed a seg-fault in the preprocessor (again) which happened when
936 you use a blank line as the first line of a multi-line macro
937 definition and then defined a label on the same line as a call to
940 Fixed a stale-pointer bug in the handling of the NASM environment
941 variable. Thanks to Thomas McWilliams.
943 ELF had a hard limit on the number of sections which caused
944 segfaults when transgressed. Fixed.
946 Added ability for ndisasm to read from stdin by using `-' as the
949 ndisasm wasn't outputting the TO keyword. Fixed.
951 Fixed error cascade on bogus expression in %if - an error in
952 evaluation was causing the entire %if to be discarded, thus creating
953 trouble later when the %else or %endif was encountered.
955 Forward reference tracking was instruction-granular not operand-
956 granular, which was causing 286-specific code to be generated
957 needlessly on code of the form `shr word [forwardref],1'. Thanks to
958 Jim Hague for sending a patch.
960 All messages now appear on stdout, as sending them to stderr serves
961 no useful purpose other than to make redirection difficult.
963 Fixed the problem with EQUs pointing to an external symbol - this
964 now generates an error message.
966 Allowed multiple size prefixes to an operand, of which only the first
967 is taken into account.
969 Incorporated John Fine's changes, including fixes of a large number
970 of preprocessor bugs, some small problems in OBJ, and a reworking of
971 label handling to define labels before their line is assembled, rather
974 Reformatted a lot of the source code to be more readable. Included
975 'coding.txt' as a guideline for how to format code for contributors.
977 Stopped nested %reps causing a panic - they now cause a slightly more
978 friendly error message instead.
980 Fixed floating point constant problems (patch by Pedro Gimeno)
982 Fixed the return value of insn_size() not being checked for -1, indicating
985 Incorporated 3D now instructions.
987 Fixed the 'mov eax, eax + ebx' bug.
989 Fixed the GLOBAL EQU bug in ELF. Released developers release 3.
991 Incorporated John Fine's command line parsing changes
993 Incorporated David Lindauer's OMF debug support
995 Made changes for LCC 4.0 support (__NASM_CDecl__, removed register size
996 specification warning when sizes agree).
998 Released NASM 0.98 Pre-release 1
1001 0.97 released December 1997
1002 ---------------------------
1004 This was entirely a bug-fix release to 0.96, which seems to have got
1007 Fixed stupid mistake in OBJ which caused `MOV EAX,<constant>' to
1008 fail. Caused by an error in the `MOV EAX,<segment>' support.
1010 ndisasm hung at EOF when compiled with lcc on Linux because lcc on
1011 Linux somehow breaks feof(). ndisasm now does not rely on feof().
1013 A heading in the documentation was missing due to a markup error in
1014 the indexing. Fixed.
1016 Fixed failure to update all pointers on realloc() within extended-
1017 operand code in parser.c. Was causing wrong behaviour and seg faults
1018 on lines such as `dd 0.0,0.0,0.0,0.0,...'
1020 Fixed a subtle preprocessor bug whereby invoking one multi-line
1021 macro on the first line of the expansion of another, when the second
1022 had been invoked with a label defined before it, didn't expand the
1025 Added internal.doc back in to the distribution archives - it was
1026 missing in 0.96 *blush*
1028 Fixed bug causing 0.96 to be unable to assemble its own test files,
1029 specifically objtest.asm. *blush again*
1031 Fixed seg-faults and bogus error messages caused by mismatching
1032 %rep and %endrep within multi-line macro definitions.
1034 Fixed a problem with buffer overrun in OBJ, which was causing
1035 corruption at ends of long PUBDEF records.
1037 Separated DOS archives into main-program and documentation to reduce
1041 0.96 released November 1997
1042 ---------------------------
1044 Fixed a bug whereby, if `nasm sourcefile' would cause a filename
1045 collision warning and put output into `nasm.out', then `nasm
1046 sourcefile -o outputfile' still gave the warning even though the
1049 Fixed name pollution under Digital UNIX: one of its header files
1050 defined R_SP, which broke the enum in nasm.h.
1052 Fixed minor instruction table problems: FUCOM and FUCOMP didn't have
1053 two-operand forms; NDISASM didn't recognise the longer register
1054 forms of PUSH and POP (eg FF F3 for PUSH BX); TEST mem,imm32 was
1055 flagged as undocumented; the 32-bit forms of CMOV had 16-bit operand
1056 size prefixes; `AAD imm' and `AAM imm' are no longer flagged as
1057 undocumented because the Intel Architecture reference documents
1060 Fixed a problem with the local-label mechanism, whereby strange
1061 types of symbol (EQUs, auto-defined OBJ segment base symbols)
1062 interfered with the `previous global label' value and screwed up
1065 Fixed a bug whereby the stub preprocessor didn't communicate with
1066 the listing file generator, so that the -a and -l options in
1067 conjunction would produce a useless listing file.
1069 Merged `os2' object file format back into `obj', after discovering
1070 that `obj' _also_ shouldn't have a link pass separator in a module
1071 containing a non-trivial MODEND. Flat segments are now declared
1072 using the FLAT attribute. `os2' is no longer a valid object format
1075 Removed the fixed-size temporary storage in the evaluator. Very very
1076 long expressions (like `mov ax,1+1+1+1+...' for two hundred 1s or
1077 so) should now no longer crash NASM.
1079 Fixed a bug involving segfaults on disassembly of MMX instructions,
1080 by changing the meaning of one of the operand-type flags in nasm.h.
1081 This may cause other apparently unrelated MMX problems; it needs to
1082 be tested thoroughly.
1084 Fixed some buffer overrun problems with large OBJ output files.
1085 Thanks to DJ Delorie for the bug report and fix.
1087 Made preprocess-only mode actually listen to the %line markers as it
1088 prints them, so that it can report errors more sanely.
1090 Re-designed the evaluator to keep more sensible track of expressions
1091 involving forward references: can now cope with previously-nightmare
1097 Added the ALIGN and ALIGNB standard macros.
1099 Added PIC support in ELF: use of WRT to obtain the four extra
1100 relocation types needed.
1102 Added the ability for output file formats to define their own
1103 extensions to the GLOBAL, COMMON and EXTERN directives.
1105 Implemented common-variable alignment, and global-symbol type and
1106 size declarations, in ELF.
1108 Implemented NEAR and FAR keywords for common variables, plus
1109 far-common element size specification, in OBJ.
1111 Added a feature whereby EXTERNs and COMMONs in OBJ can be given a
1112 default WRT specification (either a segment or a group).
1114 Transformed the Unix NASM archive into an auto-configuring package.
1116 Added a sanity-check for people applying SEG to things which are
1117 already segment bases: this previously went unnoticed by the SEG
1118 processing and caused OBJ-driver panics later.
1120 Added the ability, in OBJ format, to deal with `MOV EAX,<segment>'
1121 type references: OBJ doesn't directly support dword-size segment
1122 base fixups, but as long as the low two bytes of the constant term
1123 are zero, a word-size fixup can be generated instead and it will
1126 Added the ability to specify sections' alignment requirements in
1127 Win32 object files and pure binary files.
1129 Added preprocess-time expression evaluation: the %assign (and
1130 %iassign) directive and the bare %if (and %elif) conditional. Added
1131 relational operators to the evaluator, for use only in %if
1132 constructs: the standard relationals = < > <= >= <> (and C-like
1133 synonyms == and !=) plus low-precedence logical operators &&, ^^ and
1136 Added a preprocessor repeat construct: %rep / %exitrep / %endrep.
1138 Added the __FILE__ and __LINE__ standard macros.
1140 Added a sanity check for number constants being greater than
1141 0xFFFFFFFF. The warning can be disabled.
1143 Added the %0 token whereby a variadic multi-line macro can tell how
1144 many parameters it's been given in a specific invocation.
1146 Added %rotate, allowing multi-line macro parameters to be cycled.
1148 Added the `*' option for the maximum parameter count on multi-line
1149 macros, allowing them to take arbitrarily many parameters.
1151 Added the ability for the user-level forms of EXTERN, GLOBAL and
1152 COMMON to take more than one argument.
1154 Added the IMPORT and EXPORT directives in OBJ format, to deal with
1157 Added some more preprocessor %if constructs: %ifidn / %ifidni (exact
1158 textual identity), and %ifid / %ifnum / %ifstr (token type testing).
1160 Added the ability to distinguish SHL AX,1 (the 8086 version) from
1161 SHL AX,BYTE 1 (the 286-and-upwards version whose constant happens to
1164 Added NetBSD/FreeBSD/OpenBSD's variant of a.out format, complete
1165 with PIC shared library features.
1167 Changed NASM's idiosyncratic handling of FCLEX, FDISI, FENI, FINIT,
1168 FSAVE, FSTCW, FSTENV, and FSTSW to bring it into line with the
1169 otherwise accepted standard. The previous behaviour, though it was a
1170 deliberate feature, was a deliberate feature based on a
1171 misunderstanding. Apologies for the inconvenience.
1173 Improved the flexibility of ABSOLUTE: you can now give it an
1174 expression rather than being restricted to a constant, and it can
1175 take relocatable arguments as well.
1177 Added the ability for a variable to be declared as EXTERN multiple
1178 times, and the subsequent definitions are just ignored.
1180 We now allow instruction prefixes (CS, DS, LOCK, REPZ etc) to be
1181 alone on a line (without a following instruction).
1183 Improved sanity checks on whether the arguments to EXTERN, GLOBAL
1184 and COMMON are valid identifiers.
1186 Added misc/exebin.mac to allow direct generation of .EXE files by
1187 hacking up an EXE header using DB and DW; also added test/binexe.asm
1188 to demonstrate the use of this. Thanks to Yann Guidon for
1189 contributing the EXE header code.
1191 ndisasm forgot to check whether the input file had been successfully
1192 opened. Now it does. Doh!
1194 Added the Cyrix extensions to the MMX instruction set.
1196 Added a hinting mechanism to allow [EAX+EBX] and [EBX+EAX] to be
1197 assembled differently. This is important since [ESI+EBP] and
1198 [EBP+ESI] have different default base segment registers.
1200 Added support for the PharLap OMF extension for 4096-byte segment
1204 0.95 released July 1997
1205 -----------------------
1207 Fixed yet another ELF bug. This one manifested if the user relied on
1208 the default segment, and attempted to define global symbols without
1209 first explicitly declaring the target segment.
1211 Added makefiles (for NASM and the RDF tools) to build Win32 console
1212 apps under Symantec C++. Donated by Mark Junker.
1214 Added `macros.bas' and `insns.bas', QBasic versions of the Perl
1215 scripts that convert `standard.mac' to `macros.c' and convert
1216 `insns.dat' to `insnsa.c' and `insnsd.c'. Also thanks to Mark
1219 Changed the diassembled forms of the conditional instructions so
1220 that JB is now emitted as JC, and other similar changes. Suggested
1221 list by Ulrich Doewich.
1223 Added `@' to the list of valid characters to begin an identifier
1226 Documentary changes, notably the addition of the `Common Problems'
1227 section in nasm.doc.
1229 Fixed a bug relating to 32-bit PC-relative fixups in OBJ.
1231 Fixed a bug in perm_copy() in labels.c which was causing exceptions
1232 in cleanup_labels() on some systems.
1234 Positivity sanity check in TIMES argument changed from a warning to
1235 an error following a further complaint.
1237 Changed the acceptable limits on byte and word operands to allow
1238 things like `~10111001b' to work.
1240 Fixed a major problem in the preprocessor which caused seg-faults if
1241 macro definitions contained blank lines or comment-only lines.
1243 Fixed inadequate error checking on the commas separating the
1244 arguments to `db', `dw' etc.
1246 Fixed a crippling bug in the handling of macros with operand counts
1247 defined with a `+' modifier.
1249 Fixed a bug whereby object file formats which stored the input file
1250 name in the output file (such as OBJ and COFF) weren't doing so
1251 correctly when the output file name was specified on the command
1254 Removed [INC] and [INCLUDE] support for good, since they were
1257 Fixed a bug in OBJ which caused all fixups to be output in 16-bit
1258 (old-format) FIXUPP records, rather than putting the 32-bit ones in
1259 FIXUPP32 (new-format) records.
1261 Added, tentatively, OS/2 object file support (as a minor variant on
1264 Updates to Fox Cutter's Borland C makefile, Makefile.bc2.
1266 Removed a spurious second fclose() on the output file.
1268 Added the `-s' command line option to redirect all messages which
1269 would go to stderr (errors, help text) to stdout instead.
1271 Added the `-w' command line option to selectively suppress some
1272 classes of assembly warning messages.
1274 Added the `-p' pre-include and `-d' pre-define command-line options.
1276 Added an include file search path: the `-i' command line option.
1278 Fixed a silly little preprocessor bug whereby starting a line with a
1279 `%!' environment-variable reference caused an `unknown directive'
1282 Added the long-awaited listing file support: the `-l' command line
1285 Fixed a problem with OBJ format whereby, in the absence of any
1286 explicit segment definition, non-global symbols declared in the
1287 implicit default segment generated spurious EXTDEF records in the
1290 Added the NASM environment variable.
1292 From this version forward, Win32 console-mode binaries will be
1293 included in the DOS distribution in addition to the 16-bit binaries.
1294 Added Makefile.vc for this purpose.
1296 Added `return 0;' to test/objlink.c to prevent compiler warnings.
1298 Added the __NASM_MAJOR__ and __NASM_MINOR__ standard defines.
1300 Added an alternative memory-reference syntax in which prefixing an
1301 operand with `&' is equivalent to enclosing it in square brackets,
1302 at the request of Fox Cutter.
1304 Errors in pass two now cause the program to return a non-zero error
1305 code, which they didn't before.
1307 Fixed the single-line macro cycle detection, which didn't work at
1308 all on macros with no parameters (caused an infinite loop). Also
1309 changed the behaviour of single-line macro cycle detection to work
1310 like cpp, so that macros like `extrn' as given in the documentation
1313 Fixed the implementation of WRT, which was too restrictive in that
1314 you couldn't do `mov ax,[di+abc wrt dgroup]' because (di+abc) wasn't
1315 a relocatable reference.
1318 0.94 released April 1997
1319 ------------------------
1321 Major item: added the macro processor.
1323 Added undocumented instructions SMI, IBTS, XBTS and LOADALL286. Also
1324 reorganised CMPXCHG instruction into early-486 and Pentium forms.
1325 Thanks to Thobias Jones for the information.
1327 Fixed two more stupid bugs in ELF, which were causing `ld' to
1328 continue to seg-fault in a lot of non-trivial cases.
1330 Fixed a seg-fault in the label manager.
1332 Stopped FBLD and FBSTP from _requiring_ the TWORD keyword, which is
1333 the only option for BCD loads/stores in any case.
1335 Ensured FLDCW, FSTCW and FSTSW can cope with the WORD keyword, if
1336 anyone bothers to provide it. Previously they complained unless no
1337 keyword at all was present.
1339 Some forms of FDIV/FDIVR and FSUB/FSUBR were still inverted: a
1340 vestige of a bug that I thought had been fixed in 0.92. This was
1341 fixed, hopefully for good this time...
1343 Another minor phase error (insofar as a phase error can _ever_ be
1344 minor) fixed, this one occurring in code of the form
1345 rol ax,forward_reference
1346 forward_reference equ 1
1348 The number supplied to TIMES is now sanity-checked for positivity,
1349 and also may be greater than 64K (which previously didn't work on
1352 Added Watcom C makefiles, and misc/pmw.bat, donated by Dominik Behr.
1354 Added the INCBIN pseudo-opcode.
1356 Due to the advent of the preprocessor, the [INCLUDE] and [INC]
1357 directives have become obsolete. They are still supported in this
1358 version, with a warning, but won't be in the next.
1360 Fixed a bug in OBJ format, which caused incorrect object records to
1361 be output when absolute labels were made global.
1363 Updates to RDOFF subdirectory, and changes to outrdf.c.
1366 0.93 released January 1997
1367 --------------------------
1369 This release went out in a great hurry after semi-crippling bugs
1372 Really _did_ fix the stack overflows this time. *blush*
1374 Had problems with EA instruction sizes changing between passes, when
1375 an offset contained a forward reference and so 4 bytes were
1376 allocated for the offset in pass one; by pass two the symbol had
1377 been defined and happened to be a small absolute value, so only 1
1378 byte got allocated, causing instruction size mismatch between passes
1379 and hence incorrect address calculations. Fixed.
1381 Stupid bug in the revised ELF section generation fixed (associated
1382 string-table section for .symtab was hard-coded as 7, even when this
1383 didn't fit with the real section table). Was causing `ld' to
1384 seg-fault under Linux.
1386 Included a new Borland C makefile, Makefile.bc2, donated by Fox
1387 Cutter <lmb@comtch.iea.com>.
1390 0.92 released January 1997
1391 --------------------------
1393 The FDIVP/FDIVRP and FSUBP/FSUBRP pairs had been inverted: this was
1394 fixed. This also affected the LCC driver.
1396 Fixed a bug regarding 32-bit effective addresses of the form
1397 [other_register+ESP].
1399 Documentary changes, notably documentation of the fact that Borland
1400 Win32 compilers use `obj' rather than `win32' object format.
1402 Fixed the COMENT record in OBJ files, which was formatted
1405 Fixed a bug causing segfaults in large RDF files.
1407 OBJ format now strips initial periods from segment and group
1408 definitions, in order to avoid complications with the local label
1411 Fixed a bug in disassembling far calls and jumps in NDISASM.
1413 Added support for user-defined sections in COFF and ELF files.
1415 Compiled the DOS binaries with a sensible amount of stack, to
1416 prevent stack overflows on any arithmetic expression containing
1419 Fixed a bug in handling of files that do not terminate in a newline.
1422 0.91 released November 1996
1423 ---------------------------
1426 Support for RDF added.
1427 Support for DBG debugging format added.
1428 Support for 32-bit extensions to Microsoft OBJ format added.
1429 Revised for Borland C: some variable names changed, makefile added.
1430 LCC support revised to actually work.
1431 JMP/CALL NEAR/FAR notation added.
1432 `a16', `o16', `a32' and `o32' prefixes added.
1433 Range checking on short jumps implemented.
1434 MMX instruction support added.
1435 Negative floating point constant support added.
1436 Memory handling improved to bypass 64K barrier under DOS.
1437 $ prefix to force treatment of reserved words as identifiers added.
1438 Default-size mechanism for object formats added.
1439 Compile-time configurability added.
1440 `#', `@', `~' and `?' are now valid characters in labels.
1441 `-e' and `-k' options in NDISASM added.
1444 0.90 released October 1996
1445 --------------------------
1447 First release version. First support for object file output. Other
1448 changes from previous version (0.3x) too numerous to document.
projects / platform / upstream / nasm.git / blob