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nasm/macros/standard.mac
H. Peter Anvin 90b1ccff86 Drop unnecessary EXTERN symbols 
Currently, NASM always issues as an unknown symbol any symbol declared
EXTERN. This is highly undesirable when using common header files,
as it might cause the linker to pull in a bunch of unnecessary
modules, depending on how smart the linker is.

Add a new REQUIRED directive which behaves like the old EXTERN, for
the use cases which might still need this behavior.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
2019-09-12 20:21:03 -04:00

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;; --------------------------------------------------------------------------
;;
;; Copyright 1996-2019 The NASM Authors - All Rights Reserved
;; See the file AUTHORS included with the NASM distribution for
;; the specific copyright holders.
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following
;; conditions are met:
;;
;; * Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; * Redistributions in binary form must reproduce the above
;; copyright notice, this list of conditions and the following
;; disclaimer in the documentation and/or other materials provided
;; with the distribution.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
;; CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
;; INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
;; MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
;; CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
;; SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
;; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
;; HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
;; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
;; OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
;; EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;
;; --------------------------------------------------------------------------
; Standard macro set for NASM -*- nasm -*-
; Macros to make NASM ignore some TASM directives
STD: tasm
%idefine IDEAL
%idefine JUMPS
%idefine P386
%idefine P486
%idefine P586
%idefine END
; The normal standard macros
STD: nasm
; Note that although some user-level forms of directives are defined
; here, not all of them are: the user-level form of a format-specific
; directive should be defined in the module for that directive.
%define __?SECT?__ ; it ought to be defined, even if as nothing
%defalias __SECT__ __?SECT?__
%imacro section 1+.nolist
%define __?SECT?__ [section %1]
__?SECT?__
%endmacro
%imacro segment 1+.nolist
%define __?SECT?__ [segment %1]
__?SECT?__
%endmacro
%define __?SECTALIGN_ALIGN_UPDATES_SECTION?__ 1
%imacro sectalign 1+.nolist
%ifidni %1,off
%define __?SECTALIGN_ALIGN_UPDATES_SECTION?__ 0
%elifidni %1,on
%define __?SECTALIGN_ALIGN_UPDATES_SECTION?__ 1
%else
[sectalign %1]
%endif
%endmacro
%defalias __SECTALIGN_ALIGN_UPDATES_SECTION__ __?SECTALIGN_ALIGN_UPDATES_SECTION?__
%imacro absolute 1+.nolist
%define __?SECT?__ [absolute %1]
__?SECT?__
%endmacro
%imacro struc 1-2.nolist 0
%push
%define %$strucname %1
[absolute %2]
%$strucname: ; allow definition of `.member' to work sanely
%endmacro
%imacro endstruc 0.nolist
%{$strucname}_size equ ($-%$strucname)
%pop
__?SECT?__
%endmacro
%imacro istruc 1.nolist
%push
%define %$strucname %1
%$strucstart:
%endmacro
%imacro at 1-2+.nolist
times (%1-%$strucname)-($-%$strucstart) db 0
%2
%endmacro
%imacro iend 0.nolist
times %{$strucname}_size-($-%$strucstart) db 0
%pop
%endmacro
%imacro align 1-2+.nolist nop
%if __?SECTALIGN_ALIGN_UPDATES_SECTION?__
sectalign %1
%endif
times (((%1) - (($-$$) % (%1))) % (%1)) %2
%endmacro
%imacro alignb 1-2+.nolist
%if __?SECTALIGN_ALIGN_UPDATES_SECTION?__
sectalign %1
%endif
%ifempty %2
[warning push]
[warning -zeroing]
resb (((%1) - (($-$$) % (%1))) % (%1))
[warning pop]
%else
times (((%1) - (($-$$) % (%1))) % (%1)) %2
%endif
%endmacro
%imacro bits 1+.nolist
[bits %1]
%endmacro
%imacro use16 0.nolist
[bits 16]
%endmacro
%imacro use32 0.nolist
[bits 32]
%endmacro
%imacro use64 0.nolist
[bits 64]
%endmacro
%imacro extern 1-*.nolist
%rep %0
[extern %1]
%rotate 1
%endrep
%endmacro
%imacro static 1-*.nolist
%rep %0
[static %1]
%rotate 1
%endrep
%endmacro
%imacro global 1-*.nolist
%rep %0
[global %1]
%rotate 1
%endrep
%endmacro
%imacro required 1-*.nolist
%rep %0
[required %1]
%rotate 1
%endrep
%endmacro
%imacro common 1-*.nolist
%rep %0
[common %1]
%rotate 1
%endrep
%endmacro
%imacro cpu 1+.nolist
[cpu %1]
%endmacro
%define __?FLOAT_DAZ?__ nodaz
%define __?FLOAT_ROUND?__ near
; __?FLOAT?__ contains the whole floating-point configuration so it can
; be saved and restored
%define __?FLOAT?__ __?FLOAT_DAZ?__,__?FLOAT_ROUND?__
%defalias __FLOAT_DAZ__ __?FLOAT_DAZ?__
%defalias __FLOAT_ROUND__ __?FLOAT_ROUND?__
%defalias __FLOAT__ __?FLOAT?__
%imacro float 1-*.nolist
%rep %0
[float %1]
%ifidni %1,daz
%define __?FLOAT_DAZ?__ daz
%elifidni %1,nodaz
%define __?FLOAT_DAZ?__ nodaz
%elifidni %1,near
%define __?FLOAT_ROUND?__ near
%elifidni %1,up
%define __?FLOAT_ROUND?__ up
%elifidni %1,down
%define __?FLOAT_ROUND?__ down
%elifidni %1,zero
%define __?FLOAT_ROUND?__ zero
%elifidni %1,default
%define __?FLOAT_DAZ?__ nodaz
%define __?FLOAT_ROUND?__ near
%endif
%rotate 1
%endrep
%endmacro
%imacro default 1+.nolist
[default %1]
%endmacro
%imacro userel 0.nolist
[default rel]
%endmacro
%imacro useabs 0.nolist
[default abs]
%endmacro
%imacro usebnd 0.nolist
[default bnd]
%endmacro
%imacro usenobnd 0.nolist
[default nobnd]
%endmacro
%imacro incbin 1-2+.nolist 0
%push
%pathsearch %$dep %1
%depend %$dep
%? %$dep,%2
%pop
%endmacro
; Compatibility macro aliases
%defalias __NASM_MAJOR__ __?NASM_MAJOR?__
%defalias __NASM_MINOR__ __?NASM_MINOR?__
%defalias __NASM_SUBMINOR__ __?NASM_SUBMINOR?__
%defalias __NASM_PATCHLEVEL__ __?NASM_PATCHLEVEL?__
%defalias __NASM_SNAPSHOT__ __?NASM_SNAPSHOT?__
%defalias __NASM_VERSION_ID__ __?NASM_VERSION_ID?__
%defalias __NASM_VER__ __?NASM_VER?__
%defalias __OUTPUT_FORMAT__ __?OUTPUT_FORMAT?__
%defalias __DEBUG_FORMAT__ __?DEBUG_FORMAT?__
%defalias __DATE__ __?DATE?__
%defalias __DATE_NUM__ __?DATE_NUM?__
%defalias __TIME__ __?TIME?__
%defalias __TIME_NUM__ __?TIME_NUM?__
%defalias __UTC_DATE__ __?UTC_DATE?__
%defalias __UTC_DATE_NUM__ __?UTC_DATE_NUM?__
%defalias __UTC_TIME__ __?UTC_TIME?__
%defalias __UTC_TIME_NUM__ __?UTC_TIME_NUM?__
%defalias __POSIX_TIME__ __?POSIX_TIME?__
%defalias __FILE__ __?FILE?__
%defalias __LINE__ __?LINE?__
%defalias __BITS__ __?BITS?__
%defalias __PTR__ __?PTR?__
%defalias __PASS__ __?PASS?__
; Backwards compatiblity aliases for tokens. The extra level of indirection here
; means %aliases on|off will do the right thing for these as well.
%idefine __?infinity?__ %?
%idefine __?nan?__ %?
%idefine __?qnan?__ %?
%idefine __?snan?__ %?
%idefine __?float8?__ %?
%idefine __?float16?__ %?
%idefine __?float32?__ %?
%idefine __?float64?__ %?
%idefine __?float80m?__ %?
%idefine __?float80e?__ %?
%idefine __?float128l?__ %?
%idefine __?float128h?__ %?
%idefine __?utf16?__ %?
%idefine __?utf16le?__ %?
%idefine __?utf16be?__ %?
%idefine __?utf32?__ %?
%idefine __?utf32le?__ %?
%idefine __?utf32be?__ %?
%idefine __?ilog2e?__ %?
%idefine __?ilog2w?__ %?
%idefine __?ilog2f?__ %?
%idefine __?ilog2c?__ %?
%idefalias __infinity__ __?infinity?__
%idefalias __nan__ __?nan?__
%idefalias __qnan__ __?qnan?__
%idefalias __snan__ __?snan?__
%idefalias __float8__ __?float8?__
%idefalias __float16__ __?float16?__
%idefalias __float32__ __?float32?__
%idefalias __float64__ __?float64?__
%idefalias __float80m__ __?float80m?__
%idefalias __float80e__ __?float80e?__
%idefalias __float128l__ __?float128l?__
%idefalias __float128h__ __?float128h?__
%idefalias __utf16__ __?utf16?__
%idefalias __utf16le__ __?utf16le?__
%idefalias __utf16be__ __?utf16be?__
%idefalias __utf32__ __?utf32?__
%idefalias __utf32le__ __?utf32le?__
%idefalias __utf32be__ __?utf32be?__
%idefalias __ilog2e__ __?ilog2e?__
%idefalias __ilog2w__ __?ilog2w?__
%idefalias __ilog2f__ __?ilog2f?__
%idefalias __ilog2c__ __?ilog2c?__
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