mirror of
https://github.com/hsoft/collapseos.git
synced 2024-12-29 13:48:04 +11:00
94cb76520a
Previously, it was impossible to cross-compile Collapse OS from a binary-offsetted Collapse OS because stable ABI wordrefs would have a wrongly offsetted address. This solves the problem by replacing those wordrefs by direct, hardcoded stable ABI offset references.
17 lines
791 B
Plaintext
17 lines
791 B
Plaintext
Stable wordrefs are there for more complicated reasons. When
|
|
cross-compiling Collapse OS, we use immediate words from the
|
|
host and some of them compile wordrefs (IF compiles (?br),
|
|
LOOP compiles (loop), etc.). These compiled wordref need to
|
|
be stable across binaries, so they're part of the stable ABI.
|
|
|
|
Another layer of complexity is the fact that some binaries
|
|
don't begin at offset 0. In that case, the stable ABI doesn't
|
|
begin at 0 either. The EXECUTE word has a special handling of
|
|
those case where any wordref < 0x100 has the binary offset
|
|
applied to it.
|
|
|
|
But that's not the end of our problems. If an offsetted binary
|
|
cross compiles a binary with a different offset, stable ABI
|
|
references will be > 0x100 and be broken.
|
|
(cont.)
|