Zachary Turner <divisortheory@xxxxxxxxx> writes: > What happens if you run valgrind on your hello world executable? I get 32 errors about dependencies on uninitialized variables, much as you mentioned. I took a look at the first several. They were all tests of %gs:0xc, which is the multiple_threads field in the TCB. That field is in memory allocated by sbrk, which is guaranteed to be zero. So I think although valgrind may be correctly reporting that the program did not set the field, I think it is wrong in thinking that the value is not known. Ian
