CVSROOT: /cvs
Module name: src
Changes by: kette...@cvs.openbsd.org 2023/01/09 06:45:55
Modified files:
libexec/ld.so/hppa: ldasm.S
Log message:
In preparation for upcoming execute-only support, change the magic branch
instruction used by __canonicalize_funcptr_for_compare() from "bl" into "b".
This allows __canonicalize_funcptr_for_compare() to execute the branch
instead of decoding the instruction to find the address of _dl_bind().
This is the first step in the transition to a new ABI. Once an updated
ld.so has been installed, we can change __canonicalize_funcptr_for_compare()
(which lives in libgcc) and rebuild everything with a new libgcc. Only
then we can actually make ld.so executable-only.
ok deraadt@, miod@
