* testsuite/lib/libstdc++.exp: Load target-supports-dg.exp.

[pf3gnuchains/gcc-fork.git] / gcc / unwind-sjlj.c

diff --git a/gcc/unwind-sjlj.c b/gcc/unwind-sjlj.c
index 8d9766f..0dd4a83 100644 (file)
--- a/gcc/unwind-sjlj.c
+++ b/gcc/unwind-sjlj.c
@@ -1,5 +1,5 @@
-/* DWARF2 exception handling and frame unwind runtime interface routines.
-   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
+/* SJLJ exception handling and frame unwind runtime interface routines.
+   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
    Free Software Foundation, Inc.
 
    This file is part of GCC.
@@ -9,6 +9,15 @@
    the Free Software Foundation; either version 2, or (at your option)
    any later version.
 
+   In addition to the permissions in the GNU General Public License, the
+   Free Software Foundation gives you unlimited permission to link the
+   compiled version of this file into combinations with other programs,
+   and to distribute those combinations without any restriction coming
+   from the use of this file.  (The General Public License restrictions
+   do apply in other respects; for example, they cover modification of
+   the file, and distribution when not linked into a combined
+   executable.)
+
    GCC is distributed in the hope that it will be useful, but WITHOUT
    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
@@ -173,10 +182,10 @@ _Unwind_GetGR (struct _Unwind_Context *context, int index)
 /* Get the value of the CFA as saved in CONTEXT.  */
 
 _Unwind_Word
-_Unwind_GetCFA (struct _Unwind_Context *context)
+_Unwind_GetCFA (struct _Unwind_Context *context __attribute__((unused)))
 {
   /* ??? Ideally __builtin_setjmp places the CFA in the jmpbuf.  */
-  return NULL;
+  return (_Unwind_Word) 0;
 }
 
 void
@@ -214,7 +223,7 @@ _Unwind_GetRegionStart (struct _Unwind_Context *context __attribute__((unused))
 }
 
 void *
-_Unwind_FindEnclosingFunction (void *pc)
+_Unwind_FindEnclosingFunction (void *pc __attribute__((unused)))
 {
   return NULL;
 }
@@ -261,16 +270,13 @@ uw_init_context (struct _Unwind_Context *context)
   context->fc = _Unwind_SjLj_GetContext ();
 }
 
-/* ??? There appear to be bugs in integrate.c wrt __builtin_longjmp and
-   virtual-stack-vars.  An inline version of this segfaults on SPARC.  */
-#define uw_install_context(CURRENT, TARGET)            \
-  do                                                   \
-    {                                                  \
-      _Unwind_SjLj_SetContext ((TARGET)->fc);          \
-      longjmp ((TARGET)->fc->jbuf, 1);                 \
-    }                                                  \
-  while (0)
-
+static void __attribute__((noreturn))
+uw_install_context (struct _Unwind_Context *current __attribute__((unused)),
+                    struct _Unwind_Context *target)
+{
+  _Unwind_SjLj_SetContext (target->fc);
+  longjmp (target->fc->jbuf, 1);
+}
 
 static inline _Unwind_Ptr
 uw_identify_context (struct _Unwind_Context *context)