Hi Dave, Keith, Dave, My patch should not be needed with gcc 2.96. I have seen the oops in the kdba_setjmp when I had broken Makefiles. In particular if the CONFIG_FRAME_POINTER should be controlling the -fomit-frame-pointer option. If you are using -fomit-frame-pointer then CONFIG_FRAME_POINTER should not be defined.
We just started building kernels with gcc 3.1 from the RedHat 8.0 beta and thats where we started seeing the problem I described. I like the idea of the compiler getting rid of the frame pointer save for leaf functions so I hope we can solve this. Keith, I just tried my version of setjmp with an old egcs-2.91.66 and you are correct that it is broken. I will try to figure out when this was fixed. I wonder if its broken the same way in all the older compilers? I could do an explicit save of ebp and use it if __builtin_frame_address returns trash. Sigh. Jim Houston - Concurrent Computer Corp.
