I wonder if that's a difference in the level of support for risc-v in gdb vs lldb, or maybe that lldb has had less effort put into the "I'm a system debugger" u

I wonder if that's a difference in the level of support for risc-v in gdb vs lldb, or maybe that lldb has had less effort put into the "I'm a system debugger" use case, or just an interoperability thing where the QEMU gdb stub mostly gets tested against gdb and not against lldb ? (One of the unfortunate things about the gdb remote protocol is that there is no kind of test suite or conformance test for implementations of it as either a debug-stub or as a debugger, so testing is often limited to "does this stub work with the debugger I happened to test it against". I'm pretty sure most QEMU developers use gdb, not lldb, when using the gdbstub.)