Hi all, Note: I'm new to that mailinglist... On AArch64 X18 is used as a platform register for some platforms, so to generate portable executables it should not be used by the compiler. The use case i have for this is Wine. Windows arm64 programs use X18 as TLS register, thus it shouldn't be changed, otherwise it leads to a crash. I worked on a patch [1], but realized that X17 is a bad choice (IP registers should be avoided on arm64 for the chain register it seems...), so I wonder which register would be better. Something from X9-X15?
See also the bug report containing the patch: [1] https://bugs.winehq.org/show_bug.cgi?id=38780
