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