On 13.11.2016 19:56, Jeff Law wrote: > On 11/13/2016 11:37 AM, Helge Deller wrote: >> If you are going to change the ABI, maybe we can add more things as well? >> Which comes to my mind here is for example an optimized mcount() function >> which allows changing the return pointer (see -mmcount-ra-address on MIPS) ? > As in twiddling RP to return to a different point? No, that's not the use case for me. I was working on the ftrace functionality in the Linux kernel. I'd need to look up the full details again, but as far as I remember one of the tracers wants to know the function to which the caller of mcount() would return, so some kind of simple __builtin_return_address(2). Helge -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
