/* FRAME_CHAIN takes a frame's nominal address
and produces the frame's chain-pointer.
- FRAME_CHAIN_COMBINE takes the chain pointer and the frame's nominal address
- and produces the nominal address of the caller frame.
-
However, if FRAME_CHAIN_VALID returns zero,
- it means the given frame is the outermost one and has no caller.
- In that case, FRAME_CHAIN_COMBINE is not used. */
+ it means the given frame is the outermost one and has no caller. */
/* We cache information about saved registers in the frame structure,
to save us from having to re-scan function prologues every time
#define FRAME_CHAIN(thisframe) \
(read_memory_integer (FRAME_FP(thisframe), 4) & ~0xf)
-#define FRAME_CHAIN_COMBINE(chain, thisframe) (chain)
-
/* FRAME_CHAIN_VALID returns zero if the given frame is the outermost one
- and has no caller. In that case, FRAME_CHAIN_COMBINE is not used.
+ and has no caller.
On the i960, each various target system type must define FRAME_CHAIN_VALID,
since it differs between NINDY and VxWorks, the two currently supported