As the comment says, on most RISC platforms, the return address need not be on the stack in the first place. In fact, in all ones currently supported by Qt, it's passed in a register to the callee, which has the option of simply saving it in a callee-save register when calling leaf functions. Even if it is using a frame pointer, the compiler can simply use any register. That means unwinding the stack is not possible in the absence of either debug information or stack-unwind information, neither of which backtrace(3) will use. Strictly speaking, even on x86 the compiler can use the RBP register for any purpose and thus make getting the backtrace() impossible, but in practice it seems to work. Fixes: QTBUG-121389 Pick-to: 6.7 Change-Id: I5dd50a1a7ca5424d9e7afffd17acbd01ef916f5d Reviewed-by: Thiago Macieira <thiago.macieira@intel.com> Reviewed-by: Joerg Bornemann <joerg.bornemann@qt.io>