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; Part of Scheme 48 1.9. See file COPYING for notices and license.
; Authors: David Frese, Mike Sperber
;; Image reader that reads images into the BIBOP GC
(define (really-read-image format reverse-byte-order? port)
(enum-case image-format format
((two-space)
(really-read-image-portable format reverse-byte-order? port))
((bibop)
(really-read-image-bibop-native reverse-byte-order? port))
(else
(read-lost "invalid image format" port))))
(define (really-read-image-bibop-native reverse-byte-order? port)
;; debugging
;;(describe-small)
;;(describe-large)
;;(describe-weaks)
(let* ((small-delta (address-difference (s48-get-new-small-start-addr)
(get-small-img-start-addr)))
(small-new-hp (address+ (get-small-img-hp-addr) small-delta))
(large-delta (address-difference (s48-get-new-large-start-addr)
(get-large-img-start-addr)))
(large-new-hp (address+ (get-large-img-hp-addr) large-delta))
(weaks-delta (address-difference (s48-get-new-weaks-start-addr)
(get-weaks-img-start-addr)))
(weaks-new-hp (address+ (get-weaks-img-hp-addr) weaks-delta)))
(cond
((got-error? (really-read-weaks-image port))
(read-lost "error reading weaks area from image" port))
((got-error? (really-read-large-image port))
(read-lost "error reading large area from image" port))
((got-error? (really-read-small-image port))
(read-lost "error reading small area from image" port))
(else
(receive (ch eof? status)
(read-char port)
(cond ((error? status)
(read-lost "Error reading from image file" port))
((not eof?)
(read-lost "Image file has extraneous data after image" port))
((error? (close-input-port port))
(read-lost "Error closing image file" port))
(else
(if reverse-byte-order?
(begin
(reverse-byte-order! (s48-get-new-small-start-addr) small-new-hp)
(reverse-byte-order! (s48-get-new-large-start-addr) large-new-hp)
(reverse-byte-order! (s48-get-new-weaks-start-addr) weaks-new-hp)))
;; here we have to adjust along the new sizes of the areas
;; TODO: the adjustment must depend on where the
;; addresses point to (small, large, weaks). If the
;; delta's differ, it won't work like it is, so for now
;; we make sure they are equal
(if (not (and (= small-delta large-delta)
(= large-delta weaks-delta)))
(error "Bug: Cannot load image, because the deltas of all parts aren't equal. Notify the authors."))
(if (not (= small-delta 0))
(begin
(set-startup-procedure! (adjust (get-startup-procedure) small-delta))
(set-symbols! (adjust (get-symbols) small-delta))
(set-imported-bindings! (adjust (get-imported-bindings) small-delta))
(set-exported-bindings! (adjust (get-exported-bindings) small-delta))
(set-resumer-records! (adjust (get-resumer-records) small-delta))
(relocate-symbol-table-two-space! (get-symbols) small-delta)
(relocate-binding-table-two-space! (get-imported-bindings) small-delta)
(relocate-binding-table-two-space! (get-exported-bindings) small-delta)
(relocate-image small-delta (s48-get-new-small-start-addr) small-new-hp)))
(if (not (= large-delta 0))
(begin
;; debugging
;;(notify-large-delta)
(relocate-image large-delta (s48-get-new-large-start-addr) large-new-hp)
(unspecific)))
(if (not (= weaks-delta 0))
(begin
;; debugging
;;(notify-weaks-delta)
(relocate-image weaks-delta (s48-get-new-weaks-start-addr) weaks-new-hp)
(unspecific)))
0)))))))
(define s48-get-new-small-end-addr
(external "s48_get_new_small_end_addr" (=> () address)))
(define s48-get-new-large-end-addr
(external "s48_get_new_large_end_addr" (=> () address)))
(define s48-get-new-weaks-end-addr
(external "s48_get_new_weaks_end_addr" (=> () address)))
(define s48-get-new-small-size
(external "s48_get_new_small_size" (=> () integer)))
(define s48-get-new-large-size
(external "s48_get_new_large_size" (=> () integer)))
(define s48-get-new-weaks-size
(external "s48_get_new_weaks_size" (=> () integer)))
(define (get-small-img-whole-size)
(address-difference (get-small-img-end-addr)
(get-small-img-start-addr)))
(define (get-large-img-whole-size)
(address-difference (get-large-img-end-addr)
(get-large-img-start-addr)))
(define (get-weaks-img-whole-size)
(address-difference (get-weaks-img-end-addr)
(get-weaks-img-start-addr)))
(define (initialize-image-areas!)
(s48-initialize-image-areas (get-small-img-whole-size)
(address-difference (get-small-img-hp-addr)
(get-small-img-start-addr))
(get-large-img-whole-size)
(address-difference (get-large-img-hp-addr)
(get-large-img-start-addr))
(get-weaks-img-whole-size)
(address-difference (get-weaks-img-hp-addr)
(get-weaks-img-start-addr))))
; debugging
(define (describe-small)
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-string "SMALL DATA ")
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-string "(get-small-img-start-addr): ")
(write-out-integer (address->integer (get-small-img-start-addr)))
(write-out-newline)
(write-out-string "(get-small-img-hp-addr): ")
(write-out-integer (address->integer (get-small-img-hp-addr)))
(write-out-newline)
(write-out-string "(get-small-img-end-addr): ")
(write-out-integer (address->integer (get-small-img-end-addr)))
(write-out-newline)
(write-out-string "PAGES: ")
(write-out-integer (quotient (address-difference (get-small-img-end-addr)
(get-small-img-start-addr))
4096))
(write-out-newline)
(write-out-string "(get-new-small-start-addr): ")
(write-out-integer (address->integer (s48-get-new-small-start-addr)))
(write-out-newline)
(write-out-string "(get-new-small-end-addr): ")
(write-out-integer (address->integer (s48-get-new-small-end-addr)))
(write-out-newline)
(write-out-string "PAGES: : ")
(write-out-integer (quotient (address-difference (s48-get-new-small-end-addr)
(s48-get-new-small-start-addr))
4096))
(write-out-newline)
(write-out-string "(get-new-small-size): ")
(write-out-integer (s48-get-new-small-size))
(write-out-newline)
(write-out-string "(get-small-img-heap-size): ")
(write-out-integer (cells->a-units (get-small-img-heap-size)))
(write-out-newline)
)
(define (describe-large)
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-string "LARGE DATA ")
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-newline)
(write-out-string "(get-large-img-start-addr): ")
(write-out-integer (address->integer (get-large-img-start-addr)))
(write-out-newline)
(write-out-string "(get-large-img-end-addr): ")
(write-out-integer (address->integer (get-large-img-end-addr)))
(write-out-newline)
(write-out-string "PAGES: ")
(write-out-integer (quotient (address-difference (get-large-img-end-addr)
(get-large-img-start-addr))
4096))
(write-out-newline)
(write-out-string "(get-new-large-start-addr): ")
(write-out-integer (address->integer (s48-get-new-large-start-addr)))
(write-out-newline)
(write-out-string "(get-new-large-end-addr): ")
(write-out-integer (address->integer (s48-get-new-large-end-addr)))
(write-out-newline)
(write-out-string "PAGES: : ")
(write-out-integer (quotient (s48-get-new-large-size) 4096))
(write-out-newline)
(write-out-string "(get-new-large-size): ")
(write-out-integer (s48-get-new-large-size))
(write-out-newline)
(write-out-string "(get-large-img-heap-size): ")
(write-out-integer (cells->a-units (get-large-img-heap-size)))
(write-out-newline))
(define (describe-weaks)
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-string "WEAKS DATA ")
(write-out-newline)
(write-out-string "-----------")
(write-out-newline)
(write-out-newline)
(write-out-string "(get-weaks-img-start-addr): ")
(write-out-integer (address->integer (get-weaks-img-start-addr)))
(write-out-newline)
(write-out-string "(get-weaks-img-end-addr): ")
(write-out-integer (address->integer (get-weaks-img-end-addr)))
(write-out-newline)
(write-out-string "PAGES: ")
(write-out-integer (quotient (address-difference (get-weaks-img-end-addr)
(get-weaks-img-start-addr))
4096))
(write-out-newline)
(write-out-string "(get-new-weaks-start-addr): ")
(write-out-integer (address->integer (s48-get-new-weaks-start-addr)))
(write-out-newline)
(write-out-string "(get-new-weaks-end-addr): ")
(write-out-integer (address->integer (s48-get-new-weaks-end-addr)))
(write-out-newline)
(write-out-string "PAGES: : ")
(write-out-integer (quotient (s48-get-new-weaks-size) 4096))
(write-out-newline)
(write-out-string "(get-new-weaks-size): ")
(write-out-integer (s48-get-new-weaks-size))
(write-out-newline)
(write-out-string "(get-weaks-img-heap-size): ")
(write-out-integer (cells->a-units (get-weaks-img-heap-size)))
(write-out-newline))
(define (notify-small-delta)
(break "ADJUST SMALL DELTA"))
(define (notify-large-delta)
(break "ADJUST LARGE DELTA"))
(define (notify-weaks-delta)
(break "ADJUST WEAKS DELTA"))
(define (break str)
(write-out-newline)
(write-out-string str)
(write-out-newline))
; Utilities for portable reader
(define (read-image-area new-start-addr img-heap-size port)
(receive (okay? string)
(image-read-block port
new-start-addr
(cells->a-units img-heap-size))
(cond ((not okay?)
(read-lost string port))
(else 0))))
(define (really-read-small-image port)
(read-image-area (s48-get-new-small-start-addr)
(get-small-img-heap-size)
port))
(define (really-read-large-image port)
(read-image-area (s48-get-new-large-start-addr)
(get-large-img-heap-size)
port))
(define (really-read-weaks-image port)
(read-image-area (s48-get-new-weaks-start-addr)
(get-weaks-img-heap-size)
port))
|
