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-rw-r--r--gdb/frame-unwind.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/gdb/frame-unwind.h b/gdb/frame-unwind.h
index 12d6dd2..74c0a4a 100644
--- a/gdb/frame-unwind.h
+++ b/gdb/frame-unwind.h
@@ -118,6 +118,14 @@ typedef void (frame_prev_register_ftype) (struct frame_info *next_frame,
CORE_ADDR *addrp,
int *realnump, void *valuep);
+/* Assuming the frame chain: (outer) prev <-> this <-> next (inner);
+ use the NEXT frame, and its register unwind method, to return the PREV
+ frame's program-counter. */
+
+typedef CORE_ADDR (frame_prev_pc_ftype) (struct frame_info *next_frame,
+ void **this_prologue_cache);
+
+
struct frame_unwind
{
/* The frame's type. Should this instead be a collection of
@@ -129,6 +137,7 @@ struct frame_unwind
frame_prev_register_ftype *prev_register;
const struct frame_data *unwind_data;
frame_sniffer_ftype *sniffer;
+ frame_prev_pc_ftype *prev_pc;
};
/* Register a frame unwinder, _prepending_ it to the front of the