version 1.10, 2002/12/27 17:19:33
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version 1.21, 2010/05/13 09:39:07
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\ Compare nonrelocatable images and produce a relocatable image |
\ Compare nonrelocatable images and produce a relocatable image |
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\ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1996,1997,1998,2002,2003,2004,2007 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
\ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
\ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
\ of the License, or (at your option) any later version. |
\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
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\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
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\ You should have received a copy of the GNU General Public License |
\ You should have received a copy of the GNU General Public License |
\ along with this program; if not, write to the Free Software |
\ along with this program. If not, see http://www.gnu.org/licenses/. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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s" address-unit-bits" environment? drop constant bits/au |
s" address-unit-bits" environment? drop constant bits/au |
6 constant dodoes-tag |
7 constant dodoes-tag |
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: write-cell { w^ w file-id -- ior } |
: write-cell { w^ w file-id -- ior } |
\ write a cell to the file |
\ write a cell to the file |
Line 43 s" address-unit-bits" environment? drop
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Line 42 s" address-unit-bits" environment? drop
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if |
if |
." : images have the same base address; producing only a data-relocatable image" cr |
." : images have the same base address; producing only a data-relocatable image" cr |
else |
else |
offset abs expected-offset <> abort" images produced by different engines" |
\ the following sanity check produces false positices with exec-shield |
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\ offset abs expected-offset <> abort" images produced by different engines" |
." offset=" offset . cr |
." offset=" offset . cr |
0 image1 i-field + ! 0 image2 i-field + ! |
0 image1 i-field + ! 0 image2 i-field + ! |
endif |
endif |
base offset ; |
base offset ; |
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: >tag ( index -- tag ) |
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dup dodoes-tag 2 + > IF |
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$21 1 DO dup tag-offsets I cells + @ < IF |
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tag-offsets I 1- cells + @ - I 1- 9 lshift + negate |
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UNLOOP EXIT THEN LOOP |
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THEN -2 swap - ; |
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: compare-images { image1 image2 reloc-bits size file-id -- } |
: compare-images { image1 image2 reloc-bits size file-id -- } |
\G compares image1 and image2 (of size cells) and sets reloc-bits. |
\G compares image1 and image2 (of size cells) and sets reloc-bits. |
Line 71 s" address-unit-bits" environment? drop
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Line 77 s" address-unit-bits" environment? drop
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coffset 0<> cell1 coffset + cell2 = and |
coffset 0<> cell1 coffset + cell2 = and |
if |
if |
cell1 cbase - cell / { tag } |
cell1 cbase - cell / { tag } |
tag dodoes-tag = |
tag >tag $4000 xor file-id write-cell throw |
if |
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\ make sure that the next cell will not be tagged |
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\ !! can probably be optimized away with hybrid threading |
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dbase negate image1 i 1+ th +! |
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dbase doffset + negate image2 i 1+ th +! |
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endif |
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-2 tag $4000 or - file-id write-cell throw |
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i reloc-bits set-bit |
i reloc-bits set-bit |
else |
else |
xoffset 0<> cell1 xoffset + cell2 = and |
xoffset 0<> cell1 xoffset + cell2 = and |
if |
if |
cell1 xbase - cell / { tag } |
cell1 xbase - cell / { tag } |
tag dodoes-tag = |
tag >tag file-id write-cell throw |
if |
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\ make sure that the next cell will not be tagged |
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\ !! can probably be optimized away with hybrid threading |
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dbase negate image1 i 1+ th +! |
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dbase doffset + negate image2 i 1+ th +! |
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endif |
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-2 tag - file-id write-cell throw |
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i reloc-bits set-bit |
i reloc-bits set-bit |
else |
else |
cell1 file-id write-cell throw |
cell1 file-id write-cell throw |
Line 106 s" address-unit-bits" environment? drop
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Line 98 s" address-unit-bits" environment? drop
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: comp-image ( "image-file1" "image-file2" "new-image" -- ) |
: comp-image ( "image-file1" "image-file2" "new-image" -- ) |
name slurp-file { image1 size1 } |
name slurp-file { image1 size1 } |
image1 size1 s" Gforth3" search 0= abort" not a Gforth image" |
image1 size1 s" Gforth4" search 0= abort" not a Gforth image" |
drop 8 + image1 - { header-offset } |
drop 8 + image1 - { header-offset } |
size1 aligned size1 <> abort" unaligned image size" |
size1 aligned size1 <> abort" unaligned image size" |
image1 header-offset + 2 cells + @ header-offset + size1 <> abort" header gives wrong size" |
image1 header-offset + 2 cells + @ header-offset + size1 <> abort" header gives wrong size" |