Fixed the ``relocation error'' that happens in 64-bit mode. What
used to be a relative jump from one code object to another is now
turned into a pc-relative jump, where the jump targets are stored
somewhere at the bottom of the code that performs the jump:
old code sequence:
call-relative (Ltarget - L0)
L0: ...
new code sequence:
call-pc-relative (L1 - L0)
L0: ...
...
L1: <8-byte Ltarget>
This commit is contained in:
Abdulaziz Ghuloum
parent
69207de752
commit
820eb7dcb9
Binary file not shown.
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@ -2480,12 +2480,7 @@
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(define (compile-call-frame framesize livemask-vec multiarg-rp call-sequence)
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(let ([L_CALL (label (gensym))]
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[padding
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(- call-instruction-size
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(instruction-size call-sequence))])
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(when (< padding 0)
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(error 'compile-call-frame "call sequence too long" call-sequence))
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(let ([L_CALL (label (gensym))])
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(list 'seq
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(if (or (= framesize 0) (= framesize 1))
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'(seq)
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@ -2495,9 +2490,9 @@
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`(int ,(* framesize wordsize))
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'(current-frame-offset)
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multiarg-rp
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`(byte-vector ,(make-vector padding 0))
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L_CALL
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call-sequence
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`(pad ,call-instruction-size
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,L_CALL
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,call-sequence)
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(if (or (= framesize 0) (= framesize 1))
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'(seq)
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`(addl ,(* (fxsub1 framesize) wordsize) ,fpr)))))
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@ -16,7 +16,7 @@
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(library (ikarus.intel-assembler)
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(export instruction-size assemble-sources code-entry-adjustment)
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(export assemble-sources code-entry-adjustment)
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(import
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(ikarus)
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(rnrs bytevectors)
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@ -400,6 +400,21 @@
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(die 'convert-instruction "incorrect args" a))])))]
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[(eq? (car a) 'seq)
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(fold convert-instruction ac (cdr a))]
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[(eq? (car a) 'pad)
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(let ()
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(define (find-prefix x ls)
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(let f ([ls ls])
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(cond
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[(eq? ls x) '()]
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[else
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(let ([a (car ls)])
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(if (and (pair? a) (eq? (car a) 'bottom-code))
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(f (cdr ls))
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(cons a (f (cdr ls)))))])))
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(let ([n (cadr a)] [code (cddr a)])
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(let ([ls (fold convert-instruction ac code)])
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(let ([m (compute-code-size (find-prefix ac ls))])
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(append (make-list (- n m) 0) ls)))))]
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[else (die 'convert-instruction "unknown instruction" a)]))
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(define (RM /d dst ac)
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@ -562,6 +577,19 @@
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(cons (car ls) (f (cdr ls))))))
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ls)
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(define (jmp-pc-relative code0 code1 dst ac)
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(when (= wordsize 4)
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(error 'intel-assembler "no pc-relative jumps in 32-bit mode"))
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(let ([g (gensym)])
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(CODE code0
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(CODE code1
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(cons*
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`(local-relative . ,g)
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`(bottom-code
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(label . ,g)
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(label-addr . ,(label-name dst)))
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ac)))))
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(add-instructions instr ac
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[(ret) (CODE #xC3 ac)]
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[(cltd) (C #x99 ac)]
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@ -719,14 +747,22 @@
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(cond
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[(reg? dst) (CR* #xF7 '/3 dst ac)]
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[else (die who "invalid" instr)])]
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[(local-jmp dst) (CODE #xE9 (IMM32 dst ac))]
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[(jmp dst)
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(cond
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[(imm? dst) (CODE #xE9 (IMM32 dst ac))]
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[(imm? dst)
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(if (= wordsize 4)
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(CODE #xE9 (IMM32 dst ac))
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(jmp-pc-relative #xFF #x25 dst ac))]
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[(mem? dst) (CR* #xFF '/4 dst ac)]
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[else (die who "invalid jmp target" dst)])]
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[(local-call dst) (CODE #xE8 (IMM32 dst ac))]
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[(call dst)
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(cond
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[(imm? dst) (CODE #xE8 (IMM32 dst ac))]
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[(imm? dst)
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(if (= wordsize 4)
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(CODE #xE8 (IMM32 dst ac))
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(jmp-pc-relative #xFF #x15 dst ac))]
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[(mem? dst) (CR* #xFF '/2 dst ac)]
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[(reg? dst) (CR* #xFF '/2 dst ac)]
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[else (die who "invalid jmp target" dst)])]
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@ -812,7 +848,7 @@
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))
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(define compute-code-size
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(define compute-code-size
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(lambda (ls)
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(fold (lambda (x ac)
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(if (fixnum? x)
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@ -824,12 +860,13 @@
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[(label) ac]
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[(word reloc-word reloc-word+ label-addr
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current-frame-offset foreign-label)
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(+ ac wordsize)]
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(fx+ ac wordsize)]
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[(bottom-code)
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(fx+ ac (compute-code-size (cdr x)))]
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[else (die 'compute-code-size "unknown instr" x)])))
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0
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ls)))
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(define set-label-loc!
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(lambda (x loc)
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(when (getprop x '*label-loc*)
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@ -841,7 +878,6 @@
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(or (getprop x '*label-loc*)
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(die 'compile "undefined label" x))))
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(define unset-label-loc!
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(lambda (x)
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(remprop x '*label-loc*)))
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@ -868,22 +904,57 @@
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(code-set! code (fx+ idx 7) (fxlogand (fxsra x 53) #xFF))])]
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[else (die 'set-code-word! "unhandled" x)])))
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(define (preoptimize-local-jumps ls)
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(define locals '())
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(define g (gensym))
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(define mark
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(lambda (x)
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(when (pair? x)
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(case (car x)
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[(label)
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(let ([name (label-name x)])
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(putprop name g 'local)
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(set! locals (cons name locals)))]
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[(seq pad)
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(for-each mark (cdr x))]))))
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(define (local-label? x)
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(and (label? x) (eq? (getprop (label-name x) g) 'local)))
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(define opt
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(lambda (x)
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(when (pair? x)
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(case (car x)
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[(call)
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(when (local-label? (cadr x))
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(set-car! x 'local-call))]
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[(jmp)
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(when (local-label? (cadr x))
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(set-car! x 'local-jmp))]
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[(seq pad)
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(for-each opt (cdr x))]))))
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(for-each mark ls)
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(for-each opt ls)
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(for-each (lambda (x) (remprop x g)) locals))
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(define (optimize-local-jumps ls)
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(define locals '())
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(define g (gensym))
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(for-each
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(lambda (x)
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(when (and (pair? x) (eq? (car x) 'label))
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(putprop (cdr x) g 'local)
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(set! locals (cons (cdr x) locals))))
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ls)
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(for-each
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(lambda (x)
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(when (and (pair? x)
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(eq? (car x) 'relative)
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(eq? (getprop (cdr x) g) 'local))
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(set-car! x 'local-relative)))
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ls)
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(define (mark x)
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(when (pair? x)
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(case (car x)
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[(label)
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(putprop (cdr x) g 'local)
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(set! locals (cons (cdr x) locals))]
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[(bottom-code) (for-each mark (cdr x))])))
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(define (opt x)
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(when (pair? x)
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(case (car x)
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[(relative)
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(when (eq? (getprop (cdr x) g) 'local)
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(set-car! x 'local-relative))]
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[(bottom-code) (for-each opt (cdr x))])))
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(for-each mark ls)
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(for-each opt ls)
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(for-each (lambda (x) (remprop x g)) locals)
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ls)
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@ -892,47 +963,52 @@
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(define whack-instructions
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(lambda (x ls)
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(define f
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(lambda (ls idx reloc)
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(lambda (ls idx reloc bot*)
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(cond
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[(null? ls) reloc]
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[(null? ls)
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(if (null? bot*)
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reloc
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(f (car bot*) idx reloc (cdr bot*)))]
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[else
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(let ([a (car ls)])
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(if (fixnum? a)
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(begin
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(code-set! x idx a)
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(f (cdr ls) (fxadd1 idx) reloc))
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(f (cdr ls) (fxadd1 idx) reloc bot*))
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(case (car a)
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[(byte)
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(code-set! x idx (cdr a))
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(f (cdr ls) (fx+ idx 1) reloc)]
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(f (cdr ls) (fx+ idx 1) reloc bot*)]
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[(relative local-relative)
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(f (cdr ls) (fx+ idx 4) (cons (cons idx a) reloc))]
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(f (cdr ls) (fx+ idx 4) (cons (cons idx a) reloc) bot*)]
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[(reloc-word reloc-word+ label-addr foreign-label)
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(f (cdr ls) (fx+ idx wordsize) (cons (cons idx a) reloc))]
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(f (cdr ls) (fx+ idx wordsize) (cons (cons idx a) reloc) bot*)]
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[(word)
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(let ([v (cdr a)])
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(set-code-word! x idx v)
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(f (cdr ls) (fx+ idx wordsize) reloc))]
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(f (cdr ls) (fx+ idx wordsize) reloc bot*))]
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[(current-frame-offset)
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(set-code-word! x idx idx) ;;; FIXME 64bit
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(f (cdr ls) (fx+ idx wordsize) reloc)]
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(f (cdr ls) (fx+ idx wordsize) reloc bot*)]
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[(label)
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(set-label-loc! (cdr a) (list x idx))
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(f (cdr ls) idx reloc)]
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(f (cdr ls) idx reloc bot*)]
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[(bottom-code)
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(f (cdr ls) idx reloc (cons (cdr a) bot*))]
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[else
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(die 'whack-instructions "unknown instr" a)])))])))
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(f ls 0 '())))
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(f ls 0 '() '())))
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(define compute-reloc-size
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(define compute-reloc-size
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(lambda (ls)
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(fold (lambda (x ac)
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(if (fixnum? x)
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ac
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(case (car x)
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[(word byte label current-frame-offset local-relative) ac]
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[(reloc-word foreign-label) (fx+ ac 2)]
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[(relative reloc-word+ label-addr) (fx+ ac 3)]
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[(word byte label current-frame-offset local-relative) ac]
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[(bottom-code) (fx+ ac (compute-reloc-size (cdr x)))]
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[else (die 'compute-reloc-size "unknown instr" x)])))
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0
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ls)))
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@ -1031,14 +1107,6 @@
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[else (die 'whack-reloc "invalid reloc type" type)]))
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)))
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(define (instruction-size x)
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(unless (and (pair? x) (getprop (car x) *cogen*))
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(die 'instruction-size "not an instruction" x))
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;;; limitations: does not work if the instruction contains
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;;; a jump to a local label, and the jump is later optimized
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;;; to a short jump.
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(compute-code-size
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(convert-instruction x '())))
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(define assemble-sources
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@ -1056,6 +1124,8 @@
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(let ([closure-size* (map car ls*)]
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[code-name* (map code-name ls*)]
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[ls* (map code-list ls*)])
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(when (= wordsize 8)
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(for-each preoptimize-local-jumps ls*))
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(let* ([ls* (map convert-instructions ls*)]
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[ls* (map optimize-local-jumps ls*)])
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(let ([n* (map compute-code-size ls*)]
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@ -1 +1 @@
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1865
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1866
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