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collapseos/blk/091
Virgil Dupras 94cb76520a Refer to stable wordref by direct offset in "hot zone" immediates
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.
2020-07-05 07:09:11 -04:00

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Stable ABI
Across all architectures, some offset are referred to by off-
sets that don't change (well, not without some binary manipu-
lation). Here's the complete list of these references:
04 BOOT addr 06 (uflw) addr 08 LATEST
42 EXIT wordref 53 (br) wordref 67 (?br) wordref
80 (loop) wordref a9 2>R wordref bf (n) wordref
d4 (s) wordref
BOOT and (uflw) exist because they are referred to before those
words are defined (in core words). LATEST is a critical part
of the initialization sequence.
(cont.)