Oct. 16, 2020
11:49 a.m.
OK, I'll bite. You *are* getting the function name and offset, what additional knowledge do you get from knowing the VA?
I was hoping to use the VA to calculate the C source line where the fault happens, by substracting the function's VA from the module load address as revealed by cat /proc/modules, adding the offset within the function and then passing the offset to addr2line. I've just realised I might as well load the module object file into gdb and do 'info line *(func+offset)'. But how would I do this just with addr2line ?
What architecture is this on? Stack unwinding is architecture-dependent, so it may just be the unwinder for that arch doesn't output the virtual address.
It's a QEMU VM, 'uname -m' claims it's i686.