emaste ad717aa158 Split kern_break from sys_break and use it in linuxulator
Previously the linuxulator's linux_brk invoked the FreeBSD sys_break
syscall implementation directly.  Instead, move the bulk of the existing
implementation to kern_break, and call that from both sys_break and
linux_brk.

This also addresses a minor bug in linux_brk in that we now return the
actual (rounded up) break address, rather than the requested value.

Reviewed by:	brooks (earlier version)
Sponsored by:	Turing Robotic Industries
Differential Revision:	https://reviews.freebsd.org/D16019
2018-06-27 14:45:13 +00:00
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