commit: f0be5cfbd0fe4f62fe0ee70abef4044247984a7b Author: Sam James <sam <AT> gentoo <DOT> org> AuthorDate: Sat Jan 22 20:48:47 2022 +0000 Commit: Sam James <sam <AT> gentoo <DOT> org> CommitDate: Mon Feb 21 05:15:25 2022 +0000 URL: https://gitweb.gentoo.org/proj/devmanual.git/commit/?id=f0be5cfb
archs/sparc: mention SIGBUS/unaligned access and link to tracker bug Bug: https://bugs.gentoo.org/371525 Signed-off-by: Sam James <sam <AT> gentoo.org> Closes: https://github.com/gentoo/devmanual/pull/266 Signed-off-by: Sam James <sam <AT> gentoo.org> archs/sparc/text.xml | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/archs/sparc/text.xml b/archs/sparc/text.xml index 20ce4b8..2b00f54 100644 --- a/archs/sparc/text.xml +++ b/archs/sparc/text.xml @@ -10,6 +10,20 @@ hardware (Sun UltraSparc systems with <c>v9</c> CPUs). <c>v8</c> processors and 2.4 kernels should still work with Gentoo, but they are no longer supported by the Gentoo/SPARC team. </p> + +<p> +SPARC systems are notoriously strict on aligned access: this is the most common +type of bug seen on SPARC (other than big-endian related issues), causing a +<c>SIGBUS</c> signal to be sent to the errant process. Known issues should be +linked to +<uri link="https://bugs.gentoo.org/371525";>the related tracker bug</uri>. +</p> + +<p> +This is usually due to supposedly clever pointer casts and type punning tricks +by the code authors. +</p> + </body> <section>
