diff options
| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-17 09:10:43 +0200 |
|---|---|---|
| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-17 09:10:43 +0200 |
| commit | f2ec263023649e596c5076df32c2d328bc9393d2 (patch) | |
| tree | 5dd86caab46e552bd2e62bf9c4fb1a7504a44db4 /results/scraper/fex/311 | |
| parent | 63d2e9d409831aa8582787234cae4741847504b7 (diff) | |
| download | qemu-analysis-main.tar.gz qemu-analysis-main.zip | |
Diffstat (limited to 'results/scraper/fex/311')
| -rw-r--r-- | results/scraper/fex/311 | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/results/scraper/fex/311 b/results/scraper/fex/311 new file mode 100644 index 000000000..b62de0769 --- /dev/null +++ b/results/scraper/fex/311 @@ -0,0 +1,7 @@ +Unaligned atomic memory ops support +Currently x86 instructions translated to the atomic IR ops aren't expecting an alignment. +Compilers will go out of their way to avoid these unaligned atomics on the x86 side due to the "big ring lock" but they can still be done. +ARMv8.4-LSE resolves this issue mostly where it relaxes the atomic alignment problem. + +But we still need to work with unaligned atomics on older ARMv8 versions, and doesn't resolve the problem of an unaligned atomic crossing a cacheline (x86 works in this instance). +Will need a backpatch + fallback handling, or if it happens non-frequently, handle it in the signal handler and dispatch a threaded recompiled replacement. \ No newline at end of file |