qemu-mips -g 1234 -trace 'gdb*' test

lldb test
(lldb) target create "test"
Current executable set to 'test' (mipsr2).
(lldb) platform select remote-gdb-server
  Platform: remote-gdb-server
 Connected: no
(lldb) platform connect connect://localhost:1234
  Platform: remote-gdb-server
  Hostname: (null)
 Connected: yes
(lldb) b main
Breakpoint 1: where = test`main + 28 at test.c:4, address = 0x0040055c
(lldb) r
error: process launch failed: Lost debug server connection