0.98.33 ------- * New __NASM_PATCHLEVEL__ and __NASM_VERSION_ID__ standard macros to round out the version-query macros. version.pl now understands X.YYplWW or X.YY.ZZplWW as a version number, equivalent to X.YY.ZZ.WW (or X.YY.0.WW, as appropriate). * New keyword "strict" to disable the optimization of a specific operand. * Fix the handing of size overrides with JMP instructions (instructions such as "jmp dword foo".) 0.98.32 ------- * Fix NASM crashing when %macro directives were left unterminated. * Lots of documentation updates. * Complete rewrite of the PostScript/PDF documentation generator. * The MS Visual C++ Makefile was updated and corrected. * Recognize .rodata as a standard section name in ELF. * Fix some obsolete Perl4-isms in Perl scripts. * Fix configure.in to work with autoconf 2.5x. * Fix a couple of "make cleaner" misses. * Make the normal "./configure && make" work with Cygwin. 0.98.31 ------- * Correctly build in a separate object directory again. * Derive all references to the version number from the version file. * New standard macros __NASM_SUBMINOR__ and __NASM_VER__ macros. * Lots of Makefile updates and bug fixes. * New %ifmacro directive to test for multiline macros. * Documentation updates. * Fixes for 16-bit OBJ format output. * Changed the NASM environment variable to NASMENV. 0.98.30 ------- * Changed doc files a lot: completely removed old READMExx and Wishlist files, incorporating all information in CHANGES and TODO. * I waited a long time to rename zoutieee.c to (original) outieee.c * moved all output modules to output/ subdirectory. * Added 'make strip' target to strip debug info from nasm & ndisasm. * Added INSTALL file with installation instructions. * Added -v option description to nasm man. * Added dist makefile target to produce source distributions. * 16-bit support for ELF output format (GNU extension, but useful.) 0.98.28 ------- * Fastcooked this for Debian's Woody release: Frank applied the INCBIN bug patch to 0.98.25alt and called it 0.98.28 to not confuse poor little apt-get. 0.98.26 ------- * Reorganised files even better from 0.98.25alt 0.98.25alt ---------- * Prettified the source tree. Moved files to more reasonable places. * Added findleak.pl script to misc/ directory. * FIXME: Frank, document this please. 0.98.25 ------- * FIXME: Frank, document this please. 0.98.24p1 --------- * FIXME: Frank, document this please. 0.98.24 ------- * FIXME: Frank, document this please. 0.98.23 ------- * FIXME: Frank, document this please. 0.98.22 ------- * FIXME: Frank, document this please. 0.98.21 ------- * FIXME: Frank, document this please. 0.98.20 ------- * FIXME: Frank, document this please. 0.98.19 ------- * FIXME: Frank, document this please. 0.98.18 ------- * FIXME: Frank, document this please. 0.98.17 ------- * FIXME: Frank, document this please. 0.98.16 ------- * FIXME: Frank, document this please. 0.98.14 ------- * FIXME: Frank, document this please. 0.98.12 ------- * FIXME: Frank, document this please. 0.98.09 ------- * FIXME: Frank, document this please. 0.98.08 ------- * FIXME: Frank, document this please. 0.98.09b with John Coffman patches released 28-Oct-2001 ------------------------------------------------------- Changes from 0.98.07 release to 98.09b as of 28-Oct-2001 * More closely compatible with 0.98 when -O0 is implied or specified. Not strictly identical, since backward branches in range of short offsets are recognized, and signed byte values with no explicit size specification will be assembled as a single byte. * More forgiving with the PUSH instruction. 0.98 requires a size to be specified always. 0.98.09b will imply the size from the current BITS setting (16 or 32). * Changed definition of the optimization flag: -O0 strict two-pass assembly, JMP and Jcc are handled more like 0.98, except that back- ward JMPs are short, if possible. -O1 strict two-pass assembly, but forward branches are assembled with code guaranteed to reach; may produce larger code than -O0, but will produce successful assembly more often if branch offset sizes are not specified. -O2 multi-pass optimization, minimize branch offsets; also will minimize signed immed- iate bytes, overriding size specification. -O3 like -O2, but more passes taken, if needed 0.98.07 released 01/28/01 ------------------------- * fbk - added Stepane Denis' SSE2 instructions to a *working* version of the code - some earlier versions were based on broken code - sorry 'bout that. version "0.98.07" 01/28/01 -------- * fbk - cosmetic modifications to nasm.c, nasm.h, AUTHORS, MODIFIED 0.98.06f released 01/18/01 -------------------------- * fbk - "metalbrain"s jecxz bug fix in insns.dat - alter nasmdoc.src to match - version "0.98.06f" 0.98.06e released 01/09/01 -------------------------- * fbk - removed the "outforms.h" file - it appears to be someone's old backup of "outform.h". version "0.98.06e" 01/09/01 -------- * fbk - finally added the fix for the "multiple %includes bug", known since 7/27/99 - reported originally (?) and sent to us by Austin Lunnen - he reports that John Fine had a fix within the day. Here it is... * Nelson Rush resigns from the group. Big thanks to Nelson for his leadership and enthusiasm in getting these changes incorporated into Nasm! * fbk - [list +], [list -] directives - ineptly implemented, should be re-written or removed, perhaps. * Brian Raiter / fbk - "elfso bug" fix - applied to aoutb format as well - testing might be desirable... 08/07/00 -------- * James Seter - -postfix, -prefix command line switches. * Yuri Zaporogets - rdoff utility changes. 0.98p1 ------ * GAS-like palign (Panos Minos) * FIXME: Frank, fill this in with details 0.98bf (bug-fixed, aka brain-fuck) ---------------------------------- * FIXME: Frank, fill this in 0.98.03 with John Coffman's changes released 27-Jul-2000 -------------------------------------------------------- * Added signed byte optimizations for the 0x81/0x83 class of instructions: ADC, ADD, AND, CMP, OR, SBB, SUB, XOR: when used as 'ADD reg16,imm' or 'ADD reg32,imm.' Also optimization of signed byte form of 'PUSH imm' and 'IMUL reg,imm'/'IMUL reg,reg,imm.' No size specification is needed. * Added multi-pass JMP and Jcc offset optimization. Offsets on forward references will preferentially use the short form, without the need to code a specific size (short or near) for the branch. Added instructions for 'Jcc label' to use the form 'Jnotcc $+3/JMP label', in cases where a short offset is out of bounds. If compiling for a 386 or higher CPU, then the 386 form of Jcc will be used instead. This feature is controlled by a new command-line switch: "O", (upper case letter O). "-O0" reverts the assembler to no extra optimization passes, "-O1" allows up to 5 extra passes, and "-O2"(default), allows up to 10 extra optimization passes. * Added a new directive: 'cpu XXX', where XXX is any of: 8086, 186, 286, 386, 486, 586, pentium, 686, PPro, P2, P3 or Katmai. All are case insensitive. All instructions will be selected only if they apply to the selected cpu or lower. Corrected a couple of bugs in cpu-dependence in 'insns.dat'. * Added to 'standard.mac', the "use16" and "use32" forms of the "bits 16/32" directive. This is nothing new, just conforms to a lot of other assemblers. (minor) * Changed label allocation from 320/32 (10000 labels @ 200K+) to 32/37 (1000 labels); makes running under DOS much easier. Since additional label space is allocated dynamically, this should have no effect on large programs with lots of labels. The 37 is a prime, believed to be better for hashing. (minor) * Integrated patchfile 0.98-0.98.01. I call this version 0.98.03, for historical reasons: 0.98.02 was trashed. --John Coffman 27-Jul-2000 Kendall Bennett's SciTech MGL changes ------------------------------------- Note that you must define "TASM_COMPAT" at compile-time to get the Tasm Ideal Mode compatibility. All changes can be compiled in and out using the TASM_COMPAT macros, and when compiled without TASM_COMPAT defined we get the exact same binary as the unmodified 0.98 sources. standard.mac, macros.c: . Added macros to ignore TASM directives before first include nasm.h: . Added extern declaration for tasm_compatible_mode nasm.c: . Added global variable tasm_compatible_mode . Added command line switch for TASM compatible mode (-t) . Changed version command line to reflect when compiled with TASM additions . Added response file processing to allow all arguments on a single line (response file is @resp rather than -@resp for NASM format). labels.c: . Changes islocal() macro to support TASM style @@local labels. . Added islocalchar() macro to support TASM style @@local labels. parser.c: . Added support for TASM style memory references (ie: mov [DWORD eax],10 rather than the NASM style mov DWORD [eax],10). preproc.c: . Added new directives, %arg, %local, %stacksize to directives table . Added support for TASM style directives without a leading % symbol. Integrated a block of changes from Andrew Zabolotny : * A new keyword %xdefine and its case-insensitive counterpart %ixdefine. They work almost the same way as %define and %idefine but expand the definition immediately, not on the invocation. Something like a cross between %define and %assign. The "x" suffix stands for "eXpand", so "xdefine" can be deciphered as "expand-and-define". Thus you can do things like this: %assign ofs 0 %macro arg 1 %xdefine %1 dword [esp+ofs] %assign ofs ofs+4 %endmacro * Changed the place where the expansion of %$name macros are expanded. Now they are converted into ..@ctxnum.name form when detokenizing, so there are no quirks as before when using %$name arguments to macros, in macros etc. For example: %macro abc 1 %define %1 hello %endm abc %$here %$here Now last line will be expanded into "hello" as expected. This also allows for lots of goodies, a good example are extended "proc" macros included in this archive. * Added a check for "cstk" in smacro_defined() before calling get_ctx() - this allows for things like: %ifdef %$abc %endif to work without warnings even in no context. * Added a check for "cstk" in %if*ctx and %elif*ctx directives - this allows to use %ifctx without excessive warnings. If there is no active context, %ifctx goes through "false" branch. * Removed "user error: " prefix with %error directive: it just clobbers the output and has absolutely no functionality. Besides, this allows to write macros that does not differ from built-in functions in any way. * Added expansion of string that is output by %error directive. Now you can do things like: %define hello(x) Hello, x! %define %$name andy %error "hello(%$name)" Same happened with %include directive. * Now all directives that expect an identifier will try to expand and concatenate everything without whitespaces in between before usage. For example, with "unfixed" nasm the commands %define %$abc hello %define __%$abc goodbye __%$abc would produce "incorrect" output: last line will expand to hello goodbyehello Not quite what you expected, eh? :-) The answer is that preprocessor treats the %define construct as if it would be %define __ %$abc goodbye (note the white space between __ and %$abc). After my "fix" it will "correctly" expand into goodbye as expected. Note that I use quotes around words "correct", "incorrect" etc because this is rather a feature not a bug; however current behaviour is more logical (and allows more advanced macro usage :-). Same change was applied to: %push,%macro,%imacro,%define,%idefine,%xdefine,%ixdefine, %assign,%iassign,%undef * A new directive [WARNING {+|-}warning-id] have been added. It works only if the assembly phase is enabled (i.e. it doesn't work with nasm -e). * A new warning type: macro-selfref. By default this warning is disabled; when enabled NASM warns when a macro self-references itself; for example the following source: [WARNING macro-selfref] %macro push 1-* %rep %0 push %1 %rotate 1 %endrep %endmacro push eax,ebx,ecx will produce a warning, but if we remove the first line we won't see it anymore (which is The Right Thing To Do {tm} IMHO since C preprocessor eats such constructs without warnings at all). * Added a "error" routine to preprocessor which always will set ERR_PASS1 bit in severity_code. This removes annoying repeated errors on first and second passes from preprocessor. * Added the %+ operator in single-line macros for concatenating two identifiers. Usage example: %define _myfunc _otherfunc %define cextern(x) _ %+ x cextern (myfunc) After first expansion, third line will become "_myfunc". After this expansion is performed again so it becomes "_otherunc". * Now if preprocessor is in a non-emmitting state, no warning or error will be emmitted. Example: %if 1 mov eax,ebx %else put anything you want between these two brackets, even macro-parameter references %1 or local labels %$zz or macro-local labels %%zz - no warning will be emmitted. %endif * Context-local variables on expansion as a last resort are looked up in outer contexts. For example, the following piece: %push outer %define %$a [esp] %push inner %$a %pop %pop will expand correctly the fourth line to [esp]; if we'll define another %$a inside the "inner" context, it will take precedence over outer definition. However, this modification has been applied only to expand_smacro and not to smacro_define: as a consequence expansion looks in outer contexts, but %ifdef won't look in outer contexts. This behaviour is needed because we don't want nested contexts to act on already defined local macros. Example: %define %$arg1 [esp+4] test eax,eax if nz mov eax,%$arg1 endif In this example the "if" mmacro enters into the "if" context, so %$arg1 is not valid anymore inside "if". Of course it could be worked around by using explicitely %$$arg1 but this is ugly IMHO. * Fixed memory leak in %undef. The origline wasn't freed before exiting on success. * Fixed trap in preprocessor when line expanded to empty set of tokens. This happens, for example, in the following case: #define SOMETHING SOMETHING 0.98 ---- All changes since NASM 0.98p3 have been produced by H. Peter Anvin . * The documentation comment delimiter is \# not #. * Allow EQU definitions to refer to external labels; reported by Pedro Gimeno. * Re-enable support for RDOFF v1; reported by Pedro Gimeno. * Updated License file per OK from Simon and Julian. 0.98p9 ------ * Update documentation (although the instruction set reference will have to wait; I don't want to hold up the 0.98 release for it.) * Verified that the NASM implementation of the PEXTRW and PMOVMSKB instructions is correct. The encoding differs from what the Intel manuals document, but the Pentium III behaviour matches NASM, not the Intel manuals. * Fix handling of implicit sizes in PSHUFW and PINSRW, reported by Stefan Hoffmeister. * Resurrect the -s option, which was removed when changing the diagnostic output to stdout. 0.98p8 ------ * Fix for "DB" when NASM is running on a bigendian machine. * Invoke insns.pl once for each output script, making Makefile.in legal for "make -j". * Improve the Unix configure-based makefiles to make package creation easier. * Included an RPM .spec file for building RPM (RedHat Package Manager) packages on Linux or Unix systems. * Fix Makefile dependency problems. * Change src/rdsrc.pl to include sectioning information in info output; required for install-info to work. * Updated the RDOFF distribution to version 2 from Jules; minor massaging to make it compile in my environment. * Split doc files that can be built by anyone with a Perl interpreter off into a separate archive. * "Dress rehearsal" release! 0.98p7 ------ * Fixed opcodes with a third byte-sized immediate argument to not complain if given "byte" on the immediate. * Allow %undef to remove single-line macros with arguments. This matches the behaviour of #undef in the C preprocessor. * Allow -d, -u, -i and -p to be specified as -D, -U, -I and -P for compatibility with most C compilers and preprocessors. This allows Makefile options to be shared between cc and nasm, for example. * Minor cleanups. * Went through the list of Katmai instructions and hopefully fixed the (rather few) mistakes in it. * (Hopefully) fixed a number of disassembler bugs related to ambiguous instructions (disambiguated by -p) and SSE instructions with REP. * Fix for bug reported by Mark Junger: "call dword 0x12345678" should work and may add an OSP (affected CALL, JMP, Jcc). * Fix for environments when "stderr" isn't a compile-time constant. 0.98p6 ------ * Took officially over coordination of the 0.98 release; so drop the p3.x notation. Skipped p4 and p5 to avoid confusion with John Fine's J4 and J5 releases. * Update the documentation; however, it still doesn't include documentation for the various new instructions. I somehow wonder if it makes sense to have an instruction set reference in the assembler manual when Intel et al have PDF versions of their manuals online. * Recognize "idt" or "centaur" for the -p option to ndisasm. * Changed error messages back to stderr where they belong, but add an -E option to redirect them elsewhere (the DOS shell cannot redirect stderr.) * -M option to generate Makefile dependencies (based on code from Alex Verstak.) * %undef preprocessor directive, and -u option, that undefines a single-line macro. * OS/2 Makefile (Mkfiles/Makefile.os2) for Borland under OS/2; from Chuck Crayne. * Various minor bugfixes (reported by): - Dangling %s in preproc.c (Martin Junker) * THERE ARE KNOWN BUGS IN SSE AND THE OTHER KATMAI INSTRUCTIONS. I am on a trip and didn't bring the Katmai instruction reference, so I can't work on them right now. * Updated the License file per agreement with Simon and Jules to include a GPL distribution clause. 0.98p3.7 -------- * (Hopefully) fixed the canned Makefiles to include the outrdf2 and zoutieee modules. * Renamed changes.asm to changed.asm. 0.98p3.6 -------- * Fixed a bunch of instructions that were added in 0.98p3.5 which had memory operands, and the address-size prefix was missing from the instruction pattern. 0.98p3.5 -------- * Merged in changes from John S. Fine's 0.98-J5 release. John's based 0.98-J5 on my 0.98p3.3 release; this merges the changes. * Expanded the instructions flag field to a long so we can fit more flags; mark SSE (KNI) and AMD or Katmai-specific instructions as such. * Fix the "PRIV" flag on a bunch of instructions, and create new "PROT" flag for protected-mode-only instructions (orthogonal to if the instruction is privileged!) and new "SMM" flag for SMM-only instructions. * Added AMD-only SYSCALL and SYSRET instructions. * Make SSE actually work, and add new Katmai MMX instructions. * Added a -p (preferred vendor) option to ndisasm so that it can distinguish e.g. Cyrix opcodes also used in SSE. For example: ndisasm -p cyrix aliased.bin 00000000 670F514310 paddsiw mm0,[ebx+0x10] 00000005 670F514320 paddsiw mm0,[ebx+0x20] ndisasm -p intel aliased.bin 00000000 670F514310 sqrtps xmm0,[ebx+0x10] 00000005 670F514320 sqrtps xmm0,[ebx+0x20] * Added a bunch of Cyrix-specific instructions. 0.98p3.4 -------- * Made at least an attempt to modify all the additional Makefiles (in the Mkfiles directory). I can't test it, but this was the best I could do. * DOS DJGPP+"Opus Make" Makefile from John S. Fine. * changes.asm changes from John S. Fine. 0.98p3.3 -------- * Patch from Conan Brink to allow nesting of %rep directives. * If we're going to allow INT01 as an alias for INT1/ICEBP (one of Jules 0.98p3 changes), then we should allow INT03 as an alias for INT3 as well. * Updated changes.asm to include the latest changes. * Tried to clean up the s that had snuck in from a DOS/Windows environment into my Unix environment, and try to make sure than DOS/Windows users get them back. * We would silently generate broken tools if insns.dat wasn't sorted properly. Change insns.pl so that the order doesn't matter. * Fix bug in insns.pl (introduced by me) which would cause conditional instructions to have an extra "cc" in disassembly, e.g. "jnz" disassembled as "jccnz". 0.98p3.2 -------- * Merged in John S. Fine's changes from his 0.98-J4 prerelease; see http://www.csoft.net/cz/johnfine/ * Changed previous "spotless" Makefile target (appropriate for distribution) to "distclean", and added "cleaner" target which is same as "clean" except deletes files generated by Perl scripts; "spotless" is union. * Removed BASIC programs from distribution. Get a Perl interpreter instead (see below.) * Calling this "pre-release 3.2" rather than "p3-hpa2" because of John's contributions. * Actually link in the IEEE output format (zoutieee.c); fix a bunch of compiler warnings in that file. Note I don't know what IEEE output is supposed to look like, so these changes were made "blind". 0.98p3-hpa ---------- * Merged nasm098p3.zip with nasm-0.97.tar.gz to create a fully buildable version for Unix systems (Makefile.in updates, etc.) * Changed insns.pl to create the instruction tables in nasm.h and names.c, so that a new instruction can be added by adding it *only* to insns.dat. * Added the following new instructions: SYSENTER, SYSEXIT, FXSAVE, FXRSTOR, UD1, UD2 (the latter two are two opcodes that Intel guarantee will never be used; one of them is documented as UD2 in Intel documentation, the other one just as "Undefined Opcode" -- calling it UD1 seemed to make sense.) * MAX_SYMBOL was defined to be 9, but LOADALL286 and LOADALL386 are 10 characters long. Now MAX_SYMBOL is derived from insns.dat. * A note on the BASIC programs included: forget them. insns.bas is already out of date. Get yourself a Perl interpreter for your platform of choice at: http://www.cpan.org/ports/index.html 0.98 pre-release 3 ------------------- added response file support, improved command line handling, new layout help screen fixed limit checking bug, 'OUT byte nn, reg' bug, and a couple of rdoff related bugs, updated Wishlist; 0.98 Prerelease 3. 0.98 pre-release 2 ------------------- fixed bug in outcoff.c to do with truncating section names longer than 8 characters, referencing beyond end of string; 0.98 pre-release 2 0.98 pre-released May 1999 -------------------------- Fixed a bug whereby STRUC didn't work at all in RDF. Fixed a problem with group specification in PUBDEFs in OBJ. Improved ease of adding new output formats. Contribution due to Fox Cutter. Fixed a bug in relocations in the `bin' format: was showing up when a relocatable reference crossed an 8192-byte boundary in any output section. Fixed a bug in local labels: local-label lookups were inconsistent between passes one and two if an EQU occurred between the definition of a global label and the subsequent use of a local label local to that global. Fixed a seg-fault in the preprocessor (again) which happened when you use a blank line as the first line of a multi-line macro definition and then defined a label on the same line as a call to that macro. Fixed a stale-pointer bug in the handling of the NASM environment variable. Thanks to Thomas McWilliams. ELF had a hard limit on the number of sections which caused segfaults when transgressed. Fixed. Added ability for ndisasm to read from stdin by using `-' as the filename. ndisasm wasn't outputting the TO keyword. Fixed. Fixed error cascade on bogus expression in %if - an error in evaluation was causing the entire %if to be discarded, thus creating trouble later when the %else or %endif was encountered. Forward reference tracking was instruction-granular not operand- granular, which was causing 286-specific code to be generated needlessly on code of the form `shr word [forwardref],1'. Thanks to Jim Hague for sending a patch. All messages now appear on stdout, as sending them to stderr serves no useful purpose other than to make redirection difficult. Fixed the problem with EQUs pointing to an external symbol - this now generates an error message. Allowed multiple size prefixes to an operand, of which only the first is taken into account. Incorporated John Fine's changes, including fixes of a large number of preprocessor bugs, some small problems in OBJ, and a reworking of label handling to define labels before their line is assembled, rather than after. Reformatted a lot of the source code to be more readable. Included 'coding.txt' as a guideline for how to format code for contributors. Stopped nested %reps causing a panic - they now cause a slightly more friendly error message instead. Fixed floating point constant problems (patch by Pedro Gimeno) Fixed the return value of insn_size() not being checked for -1, indicating an error. Incorporated 3D now instructions. Fixed the 'mov eax, eax + ebx' bug. Fixed the GLOBAL EQU bug in ELF. Released developers release 3. Incorporated John Fine's command line parsing changes Incorporated David Lindauer's OMF debug support Made changes for LCC 4.0 support (__NASM_CDecl__, removed register size specification warning when sizes agree). Released NASM 0.98 Pre-release 1 0.97 released December 1997 --------------------------- This was entirely a bug-fix release to 0.96, which seems to have got cursed. Silly me. Fixed stupid mistake in OBJ which caused `MOV EAX,' to fail. Caused by an error in the `MOV EAX,' support. ndisasm hung at EOF when compiled with lcc on Linux because lcc on Linux somehow breaks feof(). ndisasm now does not rely on feof(). A heading in the documentation was missing due to a markup error in the indexing. Fixed. Fixed failure to update all pointers on realloc() within extended- operand code in parser.c. Was causing wrong behaviour and seg faults on lines such as `dd 0.0,0.0,0.0,0.0,...' Fixed a subtle preprocessor bug whereby invoking one multi-line macro on the first line of the expansion of another, when the second had been invoked with a label defined before it, didn't expand the inner macro. Added internal.doc back in to the distribution archives - it was missing in 0.96 *blush* Fixed bug causing 0.96 to be unable to assemble its own test files, specifically objtest.asm. *blush again* Fixed seg-faults and bogus error messages caused by mismatching %rep and %endrep within multi-line macro definitions. Fixed a problem with buffer overrun in OBJ, which was causing corruption at ends of long PUBDEF records. Separated DOS archives into main-program and documentation to reduce download size. 0.96 released November 1997 --------------------------- Fixed a bug whereby, if `nasm sourcefile' would cause a filename collision warning and put output into `nasm.out', then `nasm sourcefile -o outputfile' still gave the warning even though the `-o' was honoured. Fixed name pollution under Digital UNIX: one of its header files defined R_SP, which broke the enum in nasm.h. Fixed minor instruction table problems: FUCOM and FUCOMP didn't have two-operand forms; NDISASM didn't recognise the longer register forms of PUSH and POP (eg FF F3 for PUSH BX); TEST mem,imm32 was flagged as undocumented; the 32-bit forms of CMOV had 16-bit operand size prefixes; `AAD imm' and `AAM imm' are no longer flagged as undocumented because the Intel Architecture reference documents them. Fixed a problem with the local-label mechanism, whereby strange types of symbol (EQUs, auto-defined OBJ segment base symbols) interfered with the `previous global label' value and screwed up local labels. Fixed a bug whereby the stub preprocessor didn't communicate with the listing file generator, so that the -a and -l options in conjunction would produce a useless listing file. Merged `os2' object file format back into `obj', after discovering that `obj' _also_ shouldn't have a link pass separator in a module containing a non-trivial MODEND. Flat segments are now declared using the FLAT attribute. `os2' is no longer a valid object format name: use `obj'. Removed the fixed-size temporary storage in the evaluator. Very very long expressions (like `mov ax,1+1+1+1+...' for two hundred 1s or so) should now no longer crash NASM. Fixed a bug involving segfaults on disassembly of MMX instructions, by changing the meaning of one of the operand-type flags in nasm.h. This may cause other apparently unrelated MMX problems; it needs to be tested thoroughly. Fixed some buffer overrun problems with large OBJ output files. Thanks to DJ Delorie for the bug report and fix. Made preprocess-only mode actually listen to the %line markers as it prints them, so that it can report errors more sanely. Re-designed the evaluator to keep more sensible track of expressions involving forward references: can now cope with previously-nightmare situations such as mov ax,foo | bar foo equ 1 bar equ 2 Added the ALIGN and ALIGNB standard macros. Added PIC support in ELF: use of WRT to obtain the four extra relocation types needed. Added the ability for output file formats to define their own extensions to the GLOBAL, COMMON and EXTERN directives. Implemented common-variable alignment, and global-symbol type and size declarations, in ELF. Implemented NEAR and FAR keywords for common variables, plus far-common element size specification, in OBJ. Added a feature whereby EXTERNs and COMMONs in OBJ can be given a default WRT specification (either a segment or a group). Transformed the Unix NASM archive into an auto-configuring package. Added a sanity-check for people applying SEG to things which are already segment bases: this previously went unnoticed by the SEG processing and caused OBJ-driver panics later. Added the ability, in OBJ format, to deal with `MOV EAX,' type references: OBJ doesn't directly support dword-size segment base fixups, but as long as the low two bytes of the constant term are zero, a word-size fixup can be generated instead and it will work. Added the ability to specify sections' alignment requirements in Win32 object files and pure binary files. Added preprocess-time expression evaluation: the %assign (and %iassign) directive and the bare %if (and %elif) conditional. Added relational operators to the evaluator, for use only in %if constructs: the standard relationals = < > <= >= <> (and C-like synonyms == and !=) plus low-precedence logical operators &&, ^^ and ||. Added a preprocessor repeat construct: %rep / %exitrep / %endrep. Added the __FILE__ and __LINE__ standard macros. Added a sanity check for number constants being greater than 0xFFFFFFFF. The warning can be disabled. Added the %0 token whereby a variadic multi-line macro can tell how many parameters it's been given in a specific invocation. Added %rotate, allowing multi-line macro parameters to be cycled. Added the `*' option for the maximum parameter count on multi-line macros, allowing them to take arbitrarily many parameters. Added the ability for the user-level forms of EXTERN, GLOBAL and COMMON to take more than one argument. Added the IMPORT and EXPORT directives in OBJ format, to deal with Windows DLLs. Added some more preprocessor %if constructs: %ifidn / %ifidni (exact textual identity), and %ifid / %ifnum / %ifstr (token type testing). Added the ability to distinguish SHL AX,1 (the 8086 version) from SHL AX,BYTE 1 (the 286-and-upwards version whose constant happens to be 1). Added NetBSD/FreeBSD/OpenBSD's variant of a.out format, complete with PIC shared library features. Changed NASM's idiosyncratic handling of FCLEX, FDISI, FENI, FINIT, FSAVE, FSTCW, FSTENV, and FSTSW to bring it into line with the otherwise accepted standard. The previous behaviour, though it was a deliberate feature, was a deliberate feature based on a misunderstanding. Apologies for the inconvenience. Improved the flexibility of ABSOLUTE: you can now give it an expression rather than being restricted to a constant, and it can take relocatable arguments as well. Added the ability for a variable to be declared as EXTERN multiple times, and the subsequent definitions are just ignored. We now allow instruction prefixes (CS, DS, LOCK, REPZ etc) to be alone on a line (without a following instruction). Improved sanity checks on whether the arguments to EXTERN, GLOBAL and COMMON are valid identifiers. Added misc/exebin.mac to allow direct generation of .EXE files by hacking up an EXE header using DB and DW; also added test/binexe.asm to demonstrate the use of this. Thanks to Yann Guidon for contributing the EXE header code. ndisasm forgot to check whether the input file had been successfully opened. Now it does. Doh! Added the Cyrix extensions to the MMX instruction set. Added a hinting mechanism to allow [EAX+EBX] and [EBX+EAX] to be assembled differently. This is important since [ESI+EBP] and [EBP+ESI] have different default base segment registers. Added support for the PharLap OMF extension for 4096-byte segment alignment. 0.95 released July 1997 ----------------------- Fixed yet another ELF bug. This one manifested if the user relied on the default segment, and attempted to define global symbols without first explicitly declaring the target segment. Added makefiles (for NASM and the RDF tools) to build Win32 console apps under Symantec C++. Donated by Mark Junker. Added `macros.bas' and `insns.bas', QBasic versions of the Perl scripts that convert `standard.mac' to `macros.c' and convert `insns.dat' to `insnsa.c' and `insnsd.c'. Also thanks to Mark Junker. Changed the diassembled forms of the conditional instructions so that JB is now emitted as JC, and other similar changes. Suggested list by Ulrich Doewich. Added `@' to the list of valid characters to begin an identifier with. Documentary changes, notably the addition of the `Common Problems' section in nasm.doc. Fixed a bug relating to 32-bit PC-relative fixups in OBJ. Fixed a bug in perm_copy() in labels.c which was causing exceptions in cleanup_labels() on some systems. Positivity sanity check in TIMES argument changed from a warning to an error following a further complaint. Changed the acceptable limits on byte and word operands to allow things like `~10111001b' to work. Fixed a major problem in the preprocessor which caused seg-faults if macro definitions contained blank lines or comment-only lines. Fixed inadequate error checking on the commas separating the arguments to `db', `dw' etc. Fixed a crippling bug in the handling of macros with operand counts defined with a `+' modifier. Fixed a bug whereby object file formats which stored the input file name in the output file (such as OBJ and COFF) weren't doing so correctly when the output file name was specified on the command line. Removed [INC] and [INCLUDE] support for good, since they were obsolete anyway. Fixed a bug in OBJ which caused all fixups to be output in 16-bit (old-format) FIXUPP records, rather than putting the 32-bit ones in FIXUPP32 (new-format) records. Added, tentatively, OS/2 object file support (as a minor variant on OBJ). Updates to Fox Cutter's Borland C makefile, Makefile.bc2. Removed a spurious second fclose() on the output file. Added the `-s' command line option to redirect all messages which would go to stderr (errors, help text) to stdout instead. Added the `-w' command line option to selectively suppress some classes of assembly warning messages. Added the `-p' pre-include and `-d' pre-define command-line options. Added an include file search path: the `-i' command line option. Fixed a silly little preprocessor bug whereby starting a line with a `%!' environment-variable reference caused an `unknown directive' error. Added the long-awaited listing file support: the `-l' command line option. Fixed a problem with OBJ format whereby, in the absence of any explicit segment definition, non-global symbols declared in the implicit default segment generated spurious EXTDEF records in the output. Added the NASM environment variable. From this version forward, Win32 console-mode binaries will be included in the DOS distribution in addition to the 16-bit binaries. Added Makefile.vc for this purpose. Added `return 0;' to test/objlink.c to prevent compiler warnings. Added the __NASM_MAJOR__ and __NASM_MINOR__ standard defines. Added an alternative memory-reference syntax in which prefixing an operand with `&' is equivalent to enclosing it in square brackets, at the request of Fox Cutter. Errors in pass two now cause the program to return a non-zero error code, which they didn't before. Fixed the single-line macro cycle detection, which didn't work at all on macros with no parameters (caused an infinite loop). Also changed the behaviour of single-line macro cycle detection to work like cpp, so that macros like `extrn' as given in the documentation can be implemented. Fixed the implementation of WRT, which was too restrictive in that you couldn't do `mov ax,[di+abc wrt dgroup]' because (di+abc) wasn't a relocatable reference. 0.94 released April 1997 ------------------------ Major item: added the macro processor. Added undocumented instructions SMI, IBTS, XBTS and LOADALL286. Also reorganised CMPXCHG instruction into early-486 and Pentium forms. Thanks to Thobias Jones for the information. Fixed two more stupid bugs in ELF, which were causing `ld' to continue to seg-fault in a lot of non-trivial cases. Fixed a seg-fault in the label manager. Stopped FBLD and FBSTP from _requiring_ the TWORD keyword, which is the only option for BCD loads/stores in any case. Ensured FLDCW, FSTCW and FSTSW can cope with the WORD keyword, if anyone bothers to provide it. Previously they complained unless no keyword at all was present. Some forms of FDIV/FDIVR and FSUB/FSUBR were still inverted: a vestige of a bug that I thought had been fixed in 0.92. This was fixed, hopefully for good this time... Another minor phase error (insofar as a phase error can _ever_ be minor) fixed, this one occurring in code of the form rol ax,forward_reference forward_reference equ 1 The number supplied to TIMES is now sanity-checked for positivity, and also may be greater than 64K (which previously didn't work on 16-bit systems). Added Watcom C makefiles, and misc/pmw.bat, donated by Dominik Behr. Added the INCBIN pseudo-opcode. Due to the advent of the preprocessor, the [INCLUDE] and [INC] directives have become obsolete. They are still supported in this version, with a warning, but won't be in the next. Fixed a bug in OBJ format, which caused incorrect object records to be output when absolute labels were made global. Updates to RDOFF subdirectory, and changes to outrdf.c. 0.93 released January 1997 -------------------------- This release went out in a great hurry after semi-crippling bugs were found in 0.92. Really _did_ fix the stack overflows this time. *blush* Had problems with EA instruction sizes changing between passes, when an offset contained a forward reference and so 4 bytes were allocated for the offset in pass one; by pass two the symbol had been defined and happened to be a small absolute value, so only 1 byte got allocated, causing instruction size mismatch between passes and hence incorrect address calculations. Fixed. Stupid bug in the revised ELF section generation fixed (associated string-table section for .symtab was hard-coded as 7, even when this didn't fit with the real section table). Was causing `ld' to seg-fault under Linux. Included a new Borland C makefile, Makefile.bc2, donated by Fox Cutter . 0.92 released January 1997 -------------------------- The FDIVP/FDIVRP and FSUBP/FSUBRP pairs had been inverted: this was fixed. This also affected the LCC driver. Fixed a bug regarding 32-bit effective addresses of the form [other_register+ESP]. Documentary changes, notably documentation of the fact that Borland Win32 compilers use `obj' rather than `win32' object format. Fixed the COMENT record in OBJ files, which was formatted incorrectly. Fixed a bug causing segfaults in large RDF files. OBJ format now strips initial periods from segment and group definitions, in order to avoid complications with the local label syntax. Fixed a bug in disassembling far calls and jumps in NDISASM. Added support for user-defined sections in COFF and ELF files. Compiled the DOS binaries with a sensible amount of stack, to prevent stack overflows on any arithmetic expression containing parentheses. Fixed a bug in handling of files that do not terminate in a newline. 0.91 released November 1996 --------------------------- Loads of bug fixes. Support for RDF added. Support for DBG debugging format added. Support for 32-bit extensions to Microsoft OBJ format added. Revised for Borland C: some variable names changed, makefile added. LCC support revised to actually work. JMP/CALL NEAR/FAR notation added. `a16', `o16', `a32' and `o32' prefixes added. Range checking on short jumps implemented. MMX instruction support added. Negative floating point constant support added. Memory handling improved to bypass 64K barrier under DOS. $ prefix to force treatment of reserved words as identifiers added. Default-size mechanism for object formats added. Compile-time configurability added. `#', `@', `~' and `?' are now valid characters in labels. `-e' and `-k' options in NDISASM added. 0.90 released October 1996 -------------------------- First release version. First support for object file output. Other changes from previous version (0.3x) too numerous to document.