gdb_helpers

define amd64_bt
  set $$base = $rsp + 0x40
  # GPRs, then exception frame
  set $rax = ($$base as *const usize)[ 0]
  set $rcx = ($$base as *const usize)[ 1]
  set $rdx = ($$base as *const usize)[ 2]
  set $rvx = ($$base as *const usize)[ 3]
  # Skip RSP
  set $rbp = ($$base as *const usize)[ 5]
  set $rsi = ($$base as *const usize)[ 6]
  set $rdi = ($$base as *const usize)[ 7]
  set $r8  = ($$base as *const usize)[ 8]
  set $r9  = ($$base as *const usize)[ 9]
  set $r10 = ($$base as *const usize)[10]
  set $r11 = ($$base as *const usize)[11]
  set $r12 = ($$base as *const usize)[12]
  set $r13 = ($$base as *const usize)[13]
  set $r14 = ($$base as *const usize)[14]
  set $r15 = ($$base as *const usize)[15]
  # intnum = 16
  # err_code = 17
  set $rip = ($$base as *const usize)[17]
  # cs = 19
  # rflags = 20
  set $rsp = ($$base as *const usize)[20]
end