| \ Compare nonrelocatable images and produce a relocatable image |
\ Compare nonrelocatable images and produce a relocatable image |
| |
|
| \ Copyright (C) 1996,1997,1998 Free Software Foundation, Inc. |
\ Copyright (C) 1996,1997,1998,2002 Free Software Foundation, Inc. |
| |
|
| \ This file is part of Gforth. |
\ This file is part of Gforth. |
| |
|
| |
|
| \ 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, write to the Free Software |
| \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
| |
|
| s" address-unit-bits" environment? drop constant bits/au |
s" address-unit-bits" environment? drop constant bits/au |
| 6 constant dodoes-tag |
6 constant dodoes-tag |
| : th ( addr1 n -- addr2 ) |
: th ( addr1 n -- addr2 ) |
| cells + ; |
cells + ; |
| |
|
| |
: bset ( bmask c-addr -- ) |
| |
tuck c@ or swap c! ; |
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|
| : set-bit { u addr -- } |
: set-bit { u addr -- } |
| \ set bit u in bit-vector addr |
\ set bit u in bit-vector addr |
| u bits/au /mod |
u bits/au /mod |
| >r 1 bits/au 1- rot - lshift |
>r 1 bits/au 1- rot - lshift |
| r> addr + cset ; |
r> addr + bset ; |
| |
|
| |
: image-data { image1 image2 i-field expected-offset -- base offset } |
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image1 i-field + @ image2 i-field + @ over - { base offset } |
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offset 0= |
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if |
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." : images have the same base address; producing only a data-relocatable image" cr |
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else |
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offset abs expected-offset <> abort" images produced by different engines" |
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." offset=" offset . cr |
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0 image1 i-field + ! 0 image2 i-field + ! |
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endif |
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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. |
| image1 @ image2 @ over - { dbase doffset } |
image1 @ image2 @ over - { dbase doffset } |
| doffset 0= abort" images have the same dictionary base address" |
doffset 0= abort" images have the same dictionary base address" |
| ." data offset=" doffset . cr |
." data offset=" doffset . cr |
| image1 cell+ @ image2 cell+ @ over - { cbase coffset } |
." code" image1 image2 cell 26 cells image-data { cbase coffset } |
| coffset 0= |
." xt" image1 image2 11 cells 22 cells image-data { xbase xoffset } |
| if |
|
| ." images have the same code base address; producing only a data-relocatable image" cr |
|
| else |
|
| coffset abs 22 cells <> abort" images produced by different engines" |
|
| ." code offset=" coffset . cr |
|
| 0 image1 cell+ ! 0 image2 cell+ ! |
|
| endif |
|
| size 0 |
size 0 |
| u+do |
u+do |
| image1 i th @ image2 i th @ { cell1 cell2 } |
image1 i th @ image2 i th @ { cell1 cell2 } |
| tag dodoes-tag = |
tag dodoes-tag = |
| if |
if |
| \ make sure that the next cell will not be tagged |
\ make sure that the next cell will not be tagged |
| |
\ !! can probably be optimized away with hybrid threading |
| |
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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tag >tag $4000 xor file-id write-cell throw |
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i reloc-bits set-bit |
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else |
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xoffset 0<> cell1 xoffset + cell2 = and |
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if |
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cell1 xbase - cell / { tag } |
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tag dodoes-tag = |
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if |
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\ make sure that the next cell will not be tagged |
| |
\ !! can probably be optimized away with hybrid threading |
| dbase negate image1 i 1+ th +! |
dbase negate image1 i 1+ th +! |
| dbase doffset + negate image2 i 1+ th +! |
dbase doffset + negate image2 i 1+ th +! |
| endif |
endif |
| -2 tag - file-id write-cell throw |
tag >tag file-id write-cell throw |
| i reloc-bits set-bit |
i reloc-bits set-bit |
| else |
else |
| cell1 file-id write-cell throw |
cell1 file-id write-cell throw |
| endif |
endif |
| endif |
endif |
| endif |
endif |
| |
endif |
| loop ; |
loop ; |
| |
|
| : slurp-file ( c-addr1 u1 -- c-addr2 u2 ) |
|
| \ c-addr1 u1 is the filename, c-addr2 u2 is the file's contents |
|
| r/o bin open-file throw >r |
|
| r@ file-size throw abort" file too large" |
|
| dup allocate throw swap |
|
| 2dup r@ read-file throw over <> abort" could not read whole file" |
|
| r> close-file throw ; |
|
| |
|
| : 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" Gforth1" search 0= abort" not a Gforth image" |
image1 size1 s" Gforth3" 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" |
| size1 image1 header-offset + 2 cells + @ header-offset + <> abort" header gives wrong size" |
image1 header-offset + 2 cells + @ header-offset + size1 <> abort" header gives wrong size" |
| name slurp-file { image2 size2 } |
name slurp-file { image2 size2 } |
| size1 size2 <> abort" image sizes differ" |
size1 size2 <> abort" image sizes differ" |
| name ( "new-image" ) w/o bin create-file throw { outfile } |
name ( "new-image" ) w/o bin create-file throw { outfile } |
