diff options
Diffstat (limited to 'Changes')
| -rw-r--r-- | Changes | 166 |
1 files changed, 164 insertions, 2 deletions
@@ -129,8 +129,8 @@ be output when absolute labels were made global. Updates to RDOFF subdirectory, and changes to outrdf.c. -0.95 released July 1997 ------------------------ +0.95 not released yet +--------------------- Fixed yet another ELF bug. This one manifested if the user relied on the default segment, and attempted to define global symbols without @@ -241,3 +241,165 @@ 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. + +0.96 not released yet +--------------------- + +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,<segment>' +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. |