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authorAnas Nashif <anas.nashif@intel.com>2012-11-05 12:56:51 -0800
committerAnas Nashif <anas.nashif@intel.com>2012-11-05 12:56:51 -0800
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+NASM TODO list
+==============
+
+This, like the AUTHORS file, is intended for easy readability by both human
+and machine, thus the format.
+
+ F: feature
+ V: version you should expect it by
+ R: responsible person or - if unassigned
+ C: % complete
+ D: description
+ D: maybe on multiple lines
+
+Anything that doesn't start with /^[FVRCD]:/ should be ignored.
+
+ F:-line triggers new entry.
+ Empty V,R,C assume: V: ?, R: -, C: 0%
+
+=============
+
+F: Extended x64 Support
+D: Full FPU/MMX/SSE* instruction support for x64
+
+F: ELF64 output format
+D: Support for assembling code to the ELF64 output format
+
+F: NDISASM x64 Support
+D: Ability to disassemble respective x64 code
+
+F: General x64 Support
+V: 0.99.00
+R: Keith Kanios
+C: 99%
+D: Support for assembling 64-bit code to various output formats
+
+F: win64 (x86-64 COFF) output format
+V: 0.99.00
+R: Keith Kanios
+C: 99%
+D: Support for assembling code to the win64 output format
+
+F: c99 data-type compliance
+V: 0.99.00
+R: Keith Kanios
+C: 99%
+D: Revamped entire source-code base data-types for compliance
+D: with c99 (inttypes.h)
+
+F: __BITS__ Standard Macro
+V: 0.99.00
+R: Keith Kanios
+C: 100%
+D: __BITS__ standard macro that returns current [BITS XX] mode
+
+F: i18n via gettext
+D: kkanios: be careful about that, stick to UTF-8 if anything
+
+F: Convert shallow code model to deep code model
+D: Tired of messing between lots of unrelated files (especially .c/.h stuff)
+
+F: Automated dependency generation for Makefile
+D: Current looks awful and will break if anything changes.
+
+F: Move output modules out*.c to output/ subdir
+R: madfire
+C: 100%
+
+== THESE ARE FROM old NASM's Wishlist
+== THEY NEED SEVERE REVISING (seems they weren't updated for a couple of years or so)
+
+F: Check misc/ide.cfg into RCS as Watcom IDE enhancement thingy
+V: 0.98
+D: (nop@dlc.fi)
+
+F: Package the Linux Assembler HOWTO
+V: 0.98
+
+F: 3DNow!, SSE and other extensions need documenting
+V: 0.98
+D: hpa: Does it really make sense to have a whole instruction set
+D: reference packaged with the assembler?
+D: kkanios: Yes, for me it was a great help... and still is.
+
+F: prototypes of lrotate don't match in test/*. Fix.
+V: 0.98
+
+F: Build djgpp binaries for 0.98 onwards. Look into PMODE/W as a stub
+V: 0.98
+D: it might be a lot better than CWSDPMI. It's in PMW133.ZIP.
+
+F: %undef operator that goes along with %define
+V: ?
+C: 100%
+
+F: Fix `%error' giving error messages twice.
+V: 0.99
+D: Not especially important, as changes planned for 1.1x below will make
+D: the preprocessor be only called once.
+
+F: Sort out problems with OBJ
+V: 0.99
+D: * TLINK32 doesn't seem to like SEGDEF32 et al. So for that, we
+D: should avoid xxx32 records wherever we can.
+D: * However, didn't we change _to_ using xxx32 at some stage? Try
+D: to remember why and when.
+D: * Apparently Delphi's linker has trouble with two or more
+D: globals being defined inside a PUBDEF32. Don't even know if it
+D: _can_ cope with a PUBDEF16.
+D: * Might need extra flags. *sigh*
+
+F: Symbol table output may possibly be useful.
+V: 0.99
+D: Ken Martwick (kenm@efn.org) wants the following format:
+D: labelname type offset(hex) repetition count
+D: Possibly include xref addresses after repetition count?
+
+F: ELF fixes
+V: 0.99
+D: There are various other bugs in outelf.c that make certain kinds
+D: of relocation not work. See zbrown.asm. Looks like we may have to do
+D: a major rewrite of parts of it. Compare some NASM code output with
+D: equivalent GAS code output. Look at the ELF spec. Generally fix things.
+
+F: ELF fixes
+V: 0.99
+D: NASM is currently using a kludge in ELF that involves defining
+D: a symbol at a zero absolute offset. This isn't needed, as the
+D: documented solution to the problem that this solves is to use
+D: SHN_UNDEF.
+
+F: Debug information, in all formats it can be usefully done in.
+V: 0.99
+D: * including line-number record support.
+D: * "George C. Lindauer" <gclind01@starbase.spd.louisville.edu>
+D: wants to have some say in how this goes through.
+D: * Andrew Crabtree <andrewc@rosemail.rose.hp.com> wants to help out.
+
+F: Think about a line-continuation character.
+V: 0.99
+
+F: Consider allowing declaration of two labels on the same line,
+V: 0.99
+D: syntax 'label1[:] label2[:] ... instruction'.
+D: Need to investigate feasibility.
+
+F: Quoting of quotes by doubling them, in string and char constants.
+V: 0.99
+
+F: Two-operand syntax for SEGMENT/SECTION macro to avoid warnings
+D: of ignored section parameters on reissue of __SECT__.
+D: Or maybe skip the warning if the given parameters are identical to
+D: what was actually stored. Investigate.
+V: 0.99
+
+F: Apparently we are not missing a PSRAQ instruction, because it
+D: doesn't exist. Check that it doesn't exist as an undocumented
+D: instruction, or something stupid like that.
+V: 0.99
+
+F: Any assembled form starting 0x80 can also start 0x82.
+V: 1.00
+D: ndisasm should know this. New special code in instruction encodings, probably.
+
+F: Pointing an EQU at an external symbol now generates an error.
+V: 1.05
+D: There may be a better way of handling this; we should look into it.
+D: Ideally, the label mechanism should be changed to cope with one
+D: label being declared relative to another - that may work, but could be
+D: a pain to implement (or is it? it may be easy enough that you just
+D: need to declare a new offset in the same segment...) This should be done
+D: before v1.0 is released. There is a comment regarding this in labels.c,
+D: towards the end of the file, which discusses ways of fixing this.
+
+F: nested %rep used to cause a panic.
+V: 1.10
+D: Now a more informative error message is produced. This problem whould
+D: be fixed before v1.0.
+D: See comment in switch() statement block for PP_REP in do_directive()
+D: in preproc.c (line 1585, or thereabouts)
+
+F: Contribution
+D: zgraeme.tar contains improved hash table routines
+D: contributed by Graeme Defty <graeme@HK.Super.NET> for use in the
+D: label manager.
+
+F: Contribution
+D: zsyntax.zip contains a syntax-highlighting mode for
+D: NASM, for use with the Aurora text editor (??).
+
+F: Contribution
+D: zvim.zip contains a syntax-highlighting mode for NASM, for use with vim.
+
+F: Contribution
+D: zkendal1.zip and zkendal2.zip contain Kendall
+D: Bennett's (<KendallB@scitechsoft.com>) alternative syntax stuff,
+D: providing an alternative syntax mode for NASM which allows a macro
+D: set to be written that allows the same source files to be
+D: assembled with NASM and TASM.
+R: Kendall Bennett
+C: 100%
+
+F: Add the UD2 instruction.
+C: 100%
+
+F: Add the four instructions documented in 24368901.pdf (Intel's own document).
+C: 100%
+
+F: Some means of avoiding MOV memoffs,EAX which apparently the
+D: Pentium pairing detector thinks modifies EAX. Similar means of
+D: choosing instruction encodings where necessary.
+V: 1.10?
+
+F: The example of ..@ makes it clear that a ..@ label isn't just
+D: local, but doesn't make it clear that it isn't just global either.
+
+F: hpa wants an evaluator operator for ceil(log2(x)).
+
+F: Extra reloc types in ELF
+D: R_386_16 type 20, PC16 is 21, 8 is 22, PC8 is 23.
+D: Add support for the 16s at least.
+
+F: Lazy section creation or selective section output
+D: in COFF/win32 at least and probably other formats: don't bother to emit a section
+D: if it contains no data. Particularly the default auto-created
+D: section. We believe zero-length sections crash at least WLINK (in win32).
+
+F: Make the flags field in `struct itemplate' in insns.h a long instead of an int.
+C: 100%?
+
+F: Implement %ifref to check whether a single-line macro has ever been expanded since (last re) definition. Or maybe not. We'll see.
+
+F: add pointer to \k{insLEAVE} and \k{insENTER} in chapters about mixed-language programming.
+
+F: Some equivalent to TASM's GLOBAL directive
+D: ie something which defines a symbol as external if it doesn't end up being defined
+D: but defines it as public if it does end up being defined.
+
+F: Documentation doesn't explain about C++ name mangling.
+
+F: see if BITS can be made to do anything sensible in obj (eg set the default new-segment property to Use32).
+
+F: OBJ: coalesce consecutive offset and segment fixups for the same location into full-32bit-pointer fixups.
+D: This is apparently necessary because some twazzock in the PowerBASIC development
+D: team didn't design to support the OMF spec the way the rest of the
+D: world sees it.
+
+F: Allow % to be separated from the rest of a preproc directive, for alternative directive indentation styles.
+
+F: __DATE__, __TIME__, and text variants of __NASM_MAJOR__ and __NASM_MINOR__.
+
+F: Warn on TIMES combined with multi-line macros.
+V: 1.00
+D: TIMES gets applied to first line only - should bring to users' attention.
+
+F: Re-work the evaluator, again, with a per-object-format fixup
+D: routine, so as to be able to cope with section offsets "really"
+D: being pure numbers; should be able to allow at _least_ the two
+D: common idioms
+D: TIMES 510-$ DB 0 ; bootsector
+D: MOV AX,(PROG_END-100H)/16 ; .COM TSR
+D: Would need to call the fixup throughout the evaluator, and the
+D: fixup would have to be allowed to return UNKNOWN on pass one if it
+D: had to. (_Always_ returning UNKNOWN on pass one, though a lovely
+D: clean design, breaks the first of the above examples.)
+V: 1.10
+
+F: Preprocessor identifier concatenation?
+V: 1.10
+
+F: Arbitrary section names in `bin'.
+V: 0.98.09
+D: Is this necessary? Is it even desirable?
+D: hpa: Desirable, yes. Necessary? Probably not, but there are definitely cases where it becomes quite useful.
+R: madfire
+C: 100%
+
+F: Ability to read from a pipe.
+V: 1.10
+D: Obviously not useful under dos, so memory problems with storing
+D: entire input file aren't a problem either.
+
+F: File caching under DOS/32 bit...
+V: 1.10?
+D: maybe even implement discardable buffers that get thrown away
+D: when we get a NULL returned from malloc(). Only really useful under
+D: DOS. Think about it.
+
+F: possibly spool out the pre-processed stuff to a file, to avoid having to re-process it.
+V: 1.10?
+D: Possible problems with preprocessor values not known on pass 1? Have a look...
+
+F: Or maybe we can spool out a pre-parsed version...?
+V: 1.10
+D: Need to investigate feasibility. Does the results from the parser
+D: change from pass 1 to pass 2? Would it be feasible to alter it so that
+D: the parser returns an invariant result, and this is then processed
+D: afterwards to resolve label references, etc?
+
+F: Subsection support?
+
+F: A good ALIGN mechanism, similar to GAS's.
+V: 0.98p1
+D: GAS pads out space by means of the following (32-bit) instructions:
+D: 8DB42600000000 lea esi,[esi+0x0]
+D: 8DB600000000 lea esi,[esi+0x0]
+D: 8D742600 lea esi,[esi+0x0]
+D: 8D7600 lea esi,[esi+0x0]
+D: 8D36 lea esi,[esi]
+D: 90 nop
+D: It uses up to two of these instructions to do up to 14-byte pads;
+D: when more than 14 bytes are needed, it issues a (short) jump to
+D: the end of the padded section and then NOPs the rest. Come up with
+D: a similar scheme for 16 bit mode, and also come up with a way to
+D: use it - internal to the assembler, so that programs using ALIGN
+D: don't knock over preprocess-only mode.
+D: Also re-work the macro form so that when given one argument in a
+D: code section it calls this feature.
+R: Panos Minos
+C: 100%?
+
+F: Possibly a means whereby FP constants can be specified as immediate operands to non-FP instructions.
+D: * Possible syntax: MOV EAX,FLOAT 1.2 to get a single-precision FP
+D: constant. Then maybe MOV EAX,HI_FLOAT 1.2 and MOV EAX,LO_FLOAT
+D: 1.2 to get the two halves of a double-precision one. Best to
+D: ignore extended-precision in case it bites.
+D: * Alternatively, maybe MOV EAX,FLOAT(4,0-4,1.2) to get bytes 0-4
+D: (ie 0-3) of a 4-byte constant. Then HI_FLOAT is FLOAT(8,4-8,x)
+D: and LO_FLOAT is FLOAT(8,0-4,x). But this version allows two-byte
+D: chunks, one-byte chunks, even stranger chunks, and pieces of
+D: ten-byte reals to be bandied around as well.
+
+F: A UNION macro might be quite cool
+D: now that ABSOLUTE is sane enough to be able to handle it.
+
+F: An equivalent to gcc's ## stringify operator, plus string concatenation
+D: somehow implemented without undue ugliness, so as
+D: to be able to do `%include "/my/path/%1"' in a macro, or something
+D: similar...
+
+F: Actually _do_ something with the processor, privileged and
+D: undocumented flags in the instruction table. When this happens,
+D: consider allowing PMULHRW to map to either of the Cyrix or AMD
+D: versions?
+D: hpa: The -p option to ndisasm now uses this to some extent.
+V: 1.10
+
+F: Maybe NEC V20/V30 instructions? ?
+D: hpa: What are they? Should be trivial to implement.
+
+F: Yet more object formats.
+D: * Possibly direct support for .EXE files?
+V: 1.10
+
+F: Symbol map in binary format. Format-specific options...
+V: 1.10?
+
+F: REDESIGN: Think about EQU dependency, and about start-point specification in OBJ. Possibly re-think directive support.
+V: 1.20?
+
+F: Think about a wrapper program like gcc?
+V: 2.00?
+D: Possibly invent a _patch_ for gcc so that it can take .asm files on the command line?
+D: If a wrapper happens, think about adding an option to cause the
+D: resulting executable file to be executed immediately, thus
+D: allowing NASM source files to have #!... (probably silly)
+
+F: Multi-platform support?
+D: If so: definitely Alpha; possibly Java byte code;
+D: probably ARM/StrongARM; maybe Sparc; maybe Mips; maybe
+D: Vax. Perhaps Z80 and 6502, just for a laugh?
+
+F: Consider a 'verbose' option that prints information about the resulting object file onto stdout.
+
+F: Line numbers in the .lst file don't match the line numbers in the input.
+D: They probably should, rather than the current matching of the post-preprocessor line numbers.
+