* i386-cygwin-tdep.c (i386_cygwin_frame_chain): New function.

	(i386_cygwin_init_abi): Set i386_cygwin_frame_chain as new
	frame_chain function.
	* Makefile.in: Add dependencies due to above change.

3 files changed, 39 insertions, 1 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 01f2f33..642634f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,12 @@
 2003-04-10  Corinna Vinschen  <vinschen@redhat.com>
 
+	* i386-cygwin-tdep.c (i386_cygwin_frame_chain): New function.
+	(i386_cygwin_init_abi): Set i386_cygwin_frame_chain as new
+	frame_chain function.
+	* Makefile.in: Add dependencies due to above change.
+
+2003-04-10  Corinna Vinschen  <vinschen@redhat.com>
+
 	* blockframe.c (legacy_frame_chain_valid): Move call to
 	DEPRECATED_FRAME_CHAIN_VALID before calls to inside_entry_func and
 	inside_entry_file.
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 21255fe..4a13551 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -1798,7 +1798,7 @@ i386gnu-tdep.o: i386gnu-tdep.c $(defs_h) $(i386_tdep_h) $(osabi_h)
 i386ly-tdep.o: i386ly-tdep.c $(defs_h) $(gdbcore_h) $(inferior_h) \
 	$(regcache_h) $(target_h) $(i386_tdep_h) $(osabi_h)
 i386-cygwin-tdep.o: i386-cygwin-tdep.c $(defs_h) $(gdb_string_h) \
-	$(i386_tdep_h) $(osabi_h)
+	$(i386_tdep_h) $(osabi_h) $(gdbcore_h) $(frame_h) $(dummy_frame_h)
 i386nbsd-tdep.o: i386nbsd-tdep.c $(defs_h) $(gdbtypes_h) $(gdbcore_h) \
 	$(regcache_h) $(arch_utils_h) $(i386_tdep_h) $(i387_tdep_h) \
 	$(nbsd_tdep_h) $(solib_svr4_h) $(osabi_h)
diff --git a/gdb/i386-cygwin-tdep.c b/gdb/i386-cygwin-tdep.c
index b07911b..5911ec9 100644
--- a/gdb/i386-cygwin-tdep.c
+++ b/gdb/i386-cygwin-tdep.c
@@ -20,8 +20,37 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 #include "defs.h"
 
 #include "gdb_string.h"
+#include "gdbcore.h"
 #include "i386-tdep.h"
 #include "osabi.h"
+#include "frame.h"
+#include "dummy-frame.h"
+
+static int
+i386_cygwin_frame_chain_valid (CORE_ADDR chain, struct frame_info *thisframe)
+{
+  /* In the context where this is used, we get the saved PC before we've
+     successfully unwound far enough to be sure what we've got (it may
+     be a signal handler caller).  If we're dealing with a signal
+     handler caller, this will return valid, which is fine.  If not,
+     it'll make the correct test.  */
+  return ((get_frame_type (thisframe) == SIGTRAMP_FRAME) || chain != 0);
+}
+/* Return the chain-pointer for FRAME.  In the case of the i386, the
+   frame's nominal address is the address of a 4-byte word containing
+   the calling frame's address.  */
+static CORE_ADDR
+i386_cygwin_frame_chain (struct frame_info *frame)
+{
+  if (pc_in_dummy_frame (get_frame_pc (frame)))
+    return get_frame_base (frame);
+
+  if (get_frame_type (frame) == SIGTRAMP_FRAME
+      || i386_frameless_signal_p (frame))
+    return get_frame_base (frame);
+
+  return read_memory_unsigned_integer (get_frame_base (frame), 4);
+}
 
 static void
 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
@@ -29,6 +58,8 @@ i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 
   tdep->struct_return = reg_struct_return;
+  set_gdbarch_deprecated_frame_chain (gdbarch, i386_cygwin_frame_chain);
+  set_gdbarch_deprecated_frame_chain_valid (gdbarch, i386_cygwin_frame_chain_valid);
 }
 
 static enum gdb_osabi