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authorAndy Wingo <wingo@pobox.com>2008-09-13 19:15:20 +0200
committerAndy Wingo <wingo@pobox.com>2008-09-13 19:22:28 +0200
commitda320011a31f4b58570d8cb7e67cde39133572eb (patch)
tree85626c75e2be87d1e1dd0301eeff20c280f82e0b /libguile/frames.c
parent28106f547dc88723e02a38de7d4dc4ffc6434590 (diff)
downloadguile-da320011a31f4b58570d8cb7e67cde39133572eb.tar.gz
add a multiple values return address to stack frames
* libguile/frames.c (frame-mv-return-address): New accessor. * libguile/frames.h: Update frame diagram. (SCM_FRAME_UPPER_ADDRESS): Update for data area growing by one pointer. (SCM_FRAME_MV_RETURN_ADDRESS): New macro. * libguile/vm-engine.h (NEW_FRAME): Update for frame getting bigger by a pointer. In a normal NEW_FRAME, set the MV return address to NULL, to indicate that this continuation does not accept multiple values. * libguile/vm-i-system.c (tail-call): Update frame replacement code to understand the MV return address. (return): Make room for the MVRA.
Diffstat (limited to 'libguile/frames.c')
-rw-r--r--libguile/frames.c12
1 files changed, 12 insertions, 0 deletions
diff --git a/libguile/frames.c b/libguile/frames.c
index c4f2f275d..36f057f7e 100644
--- a/libguile/frames.c
+++ b/libguile/frames.c
@@ -151,6 +151,18 @@ SCM_DEFINE (scm_frame_return_address, "frame-return-address", 1, 0, 0,
}
#undef FUNC_NAME
+SCM_DEFINE (scm_frame_mv_return_address, "frame-mv-return-address", 1, 0, 0,
+ (SCM frame),
+ "")
+#define FUNC_NAME s_scm_frame_mv_return_address
+{
+ SCM_VALIDATE_HEAP_FRAME (1, frame);
+ return scm_from_ulong ((unsigned long)
+ (SCM_FRAME_MV_RETURN_ADDRESS
+ (SCM_HEAP_FRAME_POINTER (frame))));
+}
+#undef FUNC_NAME
+
SCM_DEFINE (scm_frame_dynamic_link, "frame-dynamic-link", 1, 0, 0,
(SCM frame),
"")