FWIW: I checked gcc for the NIOS processor.
Same has 32 general purpose registers (similar to ARM) Here <R26>+offset is used to access any global (and static) variables, while <R23>+offset is used to access any threadvars. Obviously the OS just sees that these registers (like all others) are preemption-safe while the program is running. I don't know how the initial values of there registers are set (by the OS or by the program/thread initialization RTL function).
I suppose with this paradigm, pointers to threadvars should work (other than with X86/32-Linux), as the threadvars - other than with X86 - simply have have different effective user space addresses with the different threads they are used in. Thus even cross-thread usage of pointers to threadvars would be consistent (other then with X86/32 Linux and Windows).
-Michael _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
