gdb/gdb-6.8-bz436037-reg-no-longer-active.patch
2020-01-13 15:19:20 +08:00

31 lines
1012 B
Diff

diff --git a/gdb/valops.c b/gdb/valops.c
--- a/gdb/valops.c
+++ b/gdb/valops.c
@@ -1092,6 +1092,8 @@ value_assign (struct value *toval, struct value *fromval)
struct gdbarch *gdbarch;
int value_reg;
+ value_reg = VALUE_REGNUM (toval);
+
/* Figure out which frame this is in currently.
We use VALUE_FRAME_ID for obtaining the value's frame id instead of
@@ -1101,8 +1103,14 @@ value_assign (struct value *toval, struct value *fromval)
frame. */
frame = frame_find_by_id (VALUE_FRAME_ID (toval));
- value_reg = VALUE_REGNUM (toval);
-
+ /* "set $reg+=1" should work on programs with no debug info,
+ but frame_find_by_id returns NULL here (RH bug 436037).
+ Use current frame, it represents CPU state in this case.
+ If frame_find_by_id is changed to do it internally
+ (it is contemplated there), remove this. */
+ if (!frame)
+ frame = get_current_frame ();
+ /* Probably never happens. */
if (!frame)
error (_("Value being assigned to is no longer active."));