diff options
Diffstat (limited to 'gdb/i960-tdep.c')
| -rw-r--r-- | gdb/i960-tdep.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/gdb/i960-tdep.c b/gdb/i960-tdep.c index 820e502..98718a3 100644 --- a/gdb/i960-tdep.c +++ b/gdb/i960-tdep.c @@ -122,6 +122,24 @@ check_host (void) } } +/* Is this register part of the register window system? A yes answer + implies that 1) The name of this register will not be the same in + other frames, and 2) This register is automatically "saved" upon + subroutine calls and thus there is no need to search more than one + stack frame for it. + + On the i960, in fact, the name of this register in another frame is + "mud" -- there is no overlap between the windows. Each window is + simply saved into the stack (true for our purposes, after having been + flushed; normally they reside on-chip and are restored from on-chip + without ever going to memory). */ + +static int +register_in_window_p (int regnum) +{ + return regnum <= R15_REGNUM; +} + /* i960_find_saved_register () Return the address in which frame FRAME's value of register REGNUM @@ -154,7 +172,7 @@ i960_find_saved_register (struct frame_info *frame, int regnum) stack pointer saved for *this* frame; this is returned from the next frame. */ - if (REGISTER_IN_WINDOW_P (regnum)) + if (register_in_window_p (regnum)) { frame1 = get_next_frame (frame); if (!frame1) |