92 lines
2.4 KiB
Factor
Executable File
92 lines
2.4 KiB
Factor
Executable File
! Copyright (C) 2007, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: arrays byte-arrays byte-vectors generic assocs hashtables
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io.binary kernel kernel.private math namespaces make sequences
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words quotations strings alien.accessors alien.strings layouts
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system combinators math.bitwise words.private math.order
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accessors growable cpu.architecture compiler.constants ;
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IN: compiler.codegen.fixup
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GENERIC: fixup* ( obj -- )
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: code-format ( -- n ) 22 getenv ;
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: compiled-offset ( -- n ) building get length code-format * ;
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SYMBOL: relocation-table
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SYMBOL: label-table
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M: label fixup* compiled-offset >>offset drop ;
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TUPLE: label-fixup label class ;
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: label-fixup ( label class -- ) \ label-fixup boa , ;
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M: label-fixup fixup*
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dup class>> rc-absolute?
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[ "Absolute labels not supported" throw ] when
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[ label>> ] [ class>> ] bi compiled-offset 4 - rot
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3array label-table get push ;
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TUPLE: rel-fixup class type ;
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: rel-fixup ( class type -- ) \ rel-fixup boa , ;
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: push-4 ( value vector -- )
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[ length ] [ B{ 0 0 0 0 } swap push-all ] [ underlying>> ] tri
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swap set-alien-unsigned-4 ;
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M: rel-fixup fixup*
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[ type>> ]
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[ class>> ]
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[ class>> rc-absolute-cell = cell 4 ? compiled-offset swap - ] tri
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{ 0 24 28 } bitfield
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relocation-table get push-4 ;
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M: integer fixup* , ;
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SYMBOL: literal-table
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: add-literal ( obj -- ) literal-table get push ;
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: add-dlsym-literals ( symbol dll -- )
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[ string>symbol add-literal ] [ add-literal ] bi* ;
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: rel-dlsym ( name dll class -- )
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[ add-dlsym-literals ] dip rt-dlsym rel-fixup ;
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: rel-word ( word class -- )
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[ add-literal ] dip rt-xt rel-fixup ;
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: rel-primitive ( word class -- )
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[ def>> first add-literal ] dip rt-primitive rel-fixup ;
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: rel-immediate ( literal class -- )
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[ add-literal ] dip rt-immediate rel-fixup ;
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: rel-this ( class -- )
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rt-this rel-fixup ;
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: rel-here ( offset class -- )
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[ add-literal ] dip rt-here rel-fixup ;
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: init-fixup ( -- )
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BV{ } clone relocation-table set
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V{ } clone label-table set ;
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: resolve-labels ( labels -- labels' )
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[
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first3 offset>>
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[ "Unresolved label" throw ] unless*
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3array
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] map concat ;
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: fixup ( fixup-directives -- code )
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[
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init-fixup
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[ fixup* ] each
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literal-table get >array
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relocation-table get >byte-array
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label-table get resolve-labels
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] { } make 4array ;
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