p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (p[0] == (SCM)0)
/* skip over not-yet-active frame */
p += 3;
else
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (p[0] == (SCM)0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)
p = SCM_FRAME_STACK_ADDRESS (SCM_VM_FRAME_FP (frame));
while (p <= sp)
{
- if (p + 1 < sp && p[1] == (SCM)0)
+ if (p[0] == (SCM)0)
/* skip over not-yet-active frame */
p += 3;
else if (n == i)
{
/* NB: if you change this, see frames.c:vm-frame-num-locals */
/* and frames.h, vm-engine.c, etc of course */
- PUSH ((SCM)fp); /* dynamic link */
- PUSH (0); /* mvra */
- PUSH (0); /* ra */
+
+ /* We don't initialize the dynamic link here because we don't actually
+ know that this frame will point to the current fp: it could be
+ placed elsewhere on the stack if captured in a partial
+ continuation, and invoked from some other context. */
+ PUSH (0); /* dynamic link */
+ PUSH (0); /* mvra */
+ PUSH (0); /* ra */
NEXT;
}
}
CACHE_PROGRAM ();
- fp = sp - nargs + 1;
- ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
- ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
- SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
- SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, 0);
+
+ {
+ SCM *old_fp = fp;
+
+ fp = sp - nargs + 1;
+
+ ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
+ ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
+ ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
+ SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
+ SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
+ SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, 0);
+ }
+
ip = SCM_C_OBJCODE_BASE (bp);
PUSH_CONTINUATION_HOOK ();
APPLY_HOOK ();
}
CACHE_PROGRAM ();
- fp = sp - nargs + 1;
- ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
- ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
- SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
- SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, mvra);
+
+ {
+ SCM *old_fp = fp;
+
+ fp = sp - nargs + 1;
+
+ ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
+ ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
+ ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
+ SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
+ SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
+ SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, mvra);
+ }
+
ip = SCM_C_OBJCODE_BASE (bp);
PUSH_CONTINUATION_HOOK ();
APPLY_HOOK ();