src/contrib/cortex-strings, branch stable/13FreeBSD source treehttps://cgit-dev.freebsd.org/src/atom?h=stable%2F132017-08-26T15:08:27ZWork around a bug in QEMU when loading data with a load pair instruction2017-08-26T15:08:27ZAndrew Turnerandrew@FreeBSD.org2017-08-26T15:08:27Zurn:sha1:8657387683946d0c03e09fe77029edfe309eeb20
where the source register is also the first destination register.
If this is the case, and we raise an exception in the middle of the
instruction, for example the load is across two pages and the second page
isn't mapped, QEMU will have overwritten the address with invalid data.
This is a valid behaviour in most cases, with the exception of when a
destination register is also use in address generation. As such switch
the order of the registers to ensure the address register is second so it
will be written to second, after any exceptions have happened.
This has been acknowledged in upstream QEMU, however as the workaround is
simple also handle it here.
Sponsored by: DARPA, AFRL
Fix the asm on the memchr and strchr functions.2016-09-19T14:36:16ZAndrew Turnerandrew@FreeBSD.org2016-09-19T14:36:16Zurn:sha1:27044e1770e79240a116c8d48ac0afc82b02de96
Add an alias from index to strchr as is done in the libc C implementation.
Obtained from: ABT Systems Ltd
Sponsored by: The FreeBSD Foundation
Import the Linaro Cortex Strings library into contrib.2016-09-19T13:12:09ZAndrew Turnerandrew@FreeBSD.org2016-09-19T13:12:09Zurn:sha1:09a53ad8f1318c5daae6cfb19d97f4f6459f0013
Sponsored by: The FreeBSD Foundation