| commit | 367c8215d99054892740ad74c690b106c45ebf60 | |
| author | Quentin Carbonneaux <quentin@c9x.me> | |
| Sun, 5 Dec 2021 20:25:00 +0000 (5 21:25 +0100) | ||
| committer | Quentin Carbonneaux <quentin@c9x.me> | |
| Sun, 5 Dec 2021 21:06:23 +0000 (5 22:06 +0100) | ||
| tree | 3ef0d974a740524e684b73ea26c59cafb4ca9416 | treesnapshot (tar.gz zip) |
| parent | bf153b359e9ce3ebef9bca899eb7ed5bd9045c11 | commitdiff |
arm64: fix slots with offset >32k
When slots are used with a large offset,
the emitter generates invalid assembly
code. That is caught later on by the
assembler, but it prevents compilation
of programs with large stack frames.
When a slot offset is too large to be
expressed as a constant offset to x29
(the frame pointer), emitins() inserts
a late Oaddr instruction to x16 and
replaces the large slot reference with
x16.
This change also gave me the opportunity
to refactor the save/restore logic for
callee-save registers.
This fixes the following Hare issue:
https://todo.sr.ht/~sircmpwn/hare/387
When slots are used with a large offset,
the emitter generates invalid assembly
code. That is caught later on by the
assembler, but it prevents compilation
of programs with large stack frames.
When a slot offset is too large to be
expressed as a constant offset to x29
(the frame pointer), emitins() inserts
a late Oaddr instruction to x16 and
replaces the large slot reference with
x16.
This change also gave me the opportunity
to refactor the save/restore logic for
callee-save registers.
This fixes the following Hare issue:
https://todo.sr.ht/~sircmpwn/hare/387
| arm64/emit.c | diffblobblamehistory |