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| 1 : | anton | 1.1 | \ Compare nonrelocatable images and produce a relocatable image |
| 2 : | |||
| 3 : | anton | 1.3 | \ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. |
| 4 : | anton | 1.1 | |
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ of the License, or (at your option) any later version. | ||
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | s" address-unit-bits" environment? drop constant bits/au | ||
| 22 : | 6 constant dodoes-tag | ||
| 23 : | |||
| 24 : | : write-cell { w^ w file-id -- ior } | ||
| 25 : | \ write a cell to the file | ||
| 26 : | w cell file-id write-file ; | ||
| 27 : | |||
| 28 : | : th ( addr1 n -- addr2 ) | ||
| 29 : | cells + ; | ||
| 30 : | |||
| 31 : | : set-bit { u addr -- } | ||
| 32 : | \ set bit u in bit-vector addr | ||
| 33 : | u bits/au /mod | ||
| 34 : | >r 1 bits/au 1- rot - lshift | ||
| 35 : | r> addr + cset ; | ||
| 36 : | |||
| 37 : | : compare-images { image1 image2 reloc-bits size file-id -- } | ||
| 38 : | \G compares image1 and image2 (of size cells) and sets reloc-bits. | ||
| 39 : | \G offset is the difference for relocated addresses | ||
| 40 : | \ this definition is certainly to long and too complex, but is | ||
| 41 : | \ hard to factor. | ||
| 42 : | image1 @ image2 @ over - { dbase doffset } | ||
| 43 : | doffset 0= abort" images have the same dictionary base address" | ||
| 44 : | ." data offset=" doffset . cr | ||
| 45 : | image1 cell+ @ image2 cell+ @ over - { cbase coffset } | ||
| 46 : | coffset 0= | ||
| 47 : | if | ||
| 48 : | ." images have the same code base address; producing only a data-relocatable image" cr | ||
| 49 : | else | ||
| 50 : | pazsan | 1.2 | coffset abs 22 cells <> abort" images produced by different engines" |
| 51 : | anton | 1.1 | ." code offset=" coffset . cr |
| 52 : | 0 image1 cell+ ! 0 image2 cell+ ! | ||
| 53 : | endif | ||
| 54 : | size 0 | ||
| 55 : | u+do | ||
| 56 : | image1 i th @ image2 i th @ { cell1 cell2 } | ||
| 57 : | cell1 doffset + cell2 = | ||
| 58 : | if | ||
| 59 : | cell1 dbase - file-id write-cell throw | ||
| 60 : | i reloc-bits set-bit | ||
| 61 : | else | ||
| 62 : | coffset 0<> cell1 coffset + cell2 = and | ||
| 63 : | if | ||
| 64 : | cell1 cbase - cell / { tag } | ||
| 65 : | tag dodoes-tag = | ||
| 66 : | if | ||
| 67 : | \ make sure that the next cell will not be tagged | ||
| 68 : | dbase negate image1 i 1+ th +! | ||
| 69 : | dbase doffset + negate image2 i 1+ th +! | ||
| 70 : | endif | ||
| 71 : | -2 tag - file-id write-cell throw | ||
| 72 : | i reloc-bits set-bit | ||
| 73 : | else | ||
| 74 : | cell1 file-id write-cell throw | ||
| 75 : | cell1 cell2 <> | ||
| 76 : | if | ||
| 77 : | 0 i th 9 u.r cell1 17 u.r cell2 17 u.r cr | ||
| 78 : | endif | ||
| 79 : | endif | ||
| 80 : | endif | ||
| 81 : | loop ; | ||
| 82 : | |||
| 83 : | : slurp-file ( c-addr1 u1 -- c-addr2 u2 ) | ||
| 84 : | \ c-addr1 u1 is the filename, c-addr2 u2 is the file's contents | ||
| 85 : | r/o bin open-file throw >r | ||
| 86 : | r@ file-size throw abort" file too large" | ||
| 87 : | dup allocate throw swap | ||
| 88 : | 2dup r@ read-file throw over <> abort" could not read whole file" | ||
| 89 : | r> close-file throw ; | ||
| 90 : | |||
| 91 : | : comp-image ( "image-file1" "image-file2" "new-image" -- ) | ||
| 92 : | name slurp-file { image1 size1 } | ||
| 93 : | pazsan | 1.4 | image1 size1 s" Gforth2" search 0= abort" not a Gforth image" |
| 94 : | anton | 1.1 | drop 8 + image1 - { header-offset } |
| 95 : | size1 aligned size1 <> abort" unaligned image size" | ||
| 96 : | size1 image1 header-offset + 2 cells + @ header-offset + <> abort" header gives wrong size" | ||
| 97 : | name slurp-file { image2 size2 } | ||
| 98 : | size1 size2 <> abort" image sizes differ" | ||
| 99 : | name ( "new-image" ) w/o bin create-file throw { outfile } | ||
| 100 : | size1 header-offset - 1- cell / bits/au / 1+ { reloc-size } | ||
| 101 : | reloc-size allocate throw { reloc-bits } | ||
| 102 : | reloc-bits reloc-size erase | ||
| 103 : | image1 header-offset outfile write-file throw | ||
| 104 : | base @ hex | ||
| 105 : | image1 header-offset + image2 header-offset + reloc-bits | ||
| 106 : | size1 header-offset - aligned cell / outfile compare-images | ||
| 107 : | base ! | ||
| 108 : | reloc-bits reloc-size outfile write-file throw | ||
| 109 : | outfile close-file throw ; | ||
| 110 : | |||
| 111 : |
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