Will Deacon d54e81f9af arm64: entry: avoid writing lr explicitly for constructing return paths
Using an explicit adr instruction to set the link register to point at
ret_fast_syscall/ret_to_user can defeat branch and return stack predictors.

Instead, use the standard calling instructions (bl, blr) and have an
unconditional branch as the following instruction.

Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-11-14 10:42:15 +00:00
..
2014-10-26 11:35:51 -07:00