On Sat, Oct 26, 2019 at 06:28:58PM +0100, Timothy Coltman wrote: > However, compiling with the "dynarec" option turned on gives an access > denied error when you run the emulator (the "mprotect" line in > "set_memory_executable" of "ArmDynarec.c"). This is OS X 10.14.6, with > the latest software updates. This looks like an Apple change or > something, as previous versions of the emulator did work with dynamic > compilation turned on. It seems to object to PROT_EXEC - no idea why, > though reading around suggests it may be something to do with sandboxing.
Apple is tightening up the use of code generated at runtime, since code injection is a common attack pathway. It's not possible to do it at all on iOS, for example. For macOS, it appears you need to pass MAP_JIT to mmap() and also have the feature enabled at code signing time: https://github.com/dotnet/coreclr/issues/18617 I think you also need pages RW or RX - macOS has almost no pages that are RWX and I suspect they want to keep it that way. Theo _______________________________________________ RPCEmu mailing list RPCEmu@riscos.info http://www.riscos.info/cgi-bin/mailman/listinfo/rpcemu
