Bug 205597

Summary:	[mips] __clear_cache causes calling process to abort
Product:	Base System	Reporter:	David Chisnall <theraven>
Component:	misc	Assignee:	freebsd-bugs (Nobody) <bugs>
Status:	New ---
Severity:	Affects Some People	CC:	Andrew, brooks, dnelson_1901
Priority:	---
Version:	CURRENT
Hardware:	mips
OS:	Any

Description David Chisnall freebsd_committer

2015-12-25 13:39:00 UTC

The __clear_cache function (from libgcc / libcompier-rt) ought to issue a system call that flushes instruction caches.  Instead, it aborts.  This makes it impossible to correctly implement self-modifying code on MIPS (where i-cache is not guaranteed to be coherent with d-cache).