Using registers to specify memory to read with LLDB

Question

I'm trying to teach myself assembly, and am using LLDB to debug. So far, so good, but I'm wondering whether there's a quick way to inspect the memory at an address stored in a register?

Of course, I can do

register read rbp

(for example), and then use the address via

memory read <address> ...

but really I'd like to use the register name directly in the arguments to the 'memory' command (possibly with an offset). That seems like a natural thing to want to do, but so far I haven't been able to find anything about this.

Answer 1

You can use

(lldb) x $eax
0x799be060: f0 e6 1c 01 04 00 00 00 88 23 04 00 98 23 04 00  .........#...#..
0x799be070: a8 23 04 00 b8 23 04 00 00 00 00 00 00 00 00 00  .#...#..........

To see the memory contents displayed as eg 4 floats, use

(lldb) x/4f $eax
0x799be060: 0.0000000000000000000000000000000000000288183643
0x799be064: 0.00000000000000000000000000000000000000000000560519386
0x799be068: 0.000000000000000000000000000000000000000380088195
0x799be06c: 0.000000000000000000000000000000000000000380110616