tm.texi (LIBGCC2_UNWIND_ATTRIBUTE): Document.

2007-09-14  Sandra Loosemore  <sandra@codesourcery.com>
	    Nigel Stephens  <nigel@mips.com>

	gcc/
	* doc/tm.texi (LIBGCC2_UNWIND_ATTRIBUTE): Document.
	* unwind-generic.h (LIBGCC2_UNWIND_ATTRIBUTE): Define.
	(_Unwind_RaiseException): Add LIBGCC2_UNWIND_ATTRIBUTE to
	declaration.
	(_Unwind_ForcedUnwind): Likewise.
	(_Unwind_Resume): Likewise.
	(_Unwind_Resume_or_Rethrow): Likewise.
	(_Unwind_Backtrace): Likewise.
	(_Unwind_SjLj_RaiseException): Likewise.
	(_Unwind_SjLj_ForcedUnwind): Likewise.
	(_Unwind_SjLj_Resume): Likewise.
	(_Unwind_SjLj_Resume_or_Rethrow): Likewise.
	* unwind.inc (_Unwind_RaiseException): Add LIBGCC2_UNWIND_ATTRIBUTE
	to definition.
	(_Unwind_ForcedUnwind): Likewise.
	(_Unwind_Resume): Likewise.
	(_Unwind_Resume_or_Rethrow): Likewise.
	(_Unwind_Backtrace): Likewise.
	* unwind-compat.c (_Unwind_Backtrace): Likewise.
	(_Unwind_ForcedUnwind): Likewise.
	(_Unwind_RaiseException): Likewise.
	(_Unwind_Resume): Likewise.
	(_Unwind_Resume_or_Rethrow): Likewise.

	* config/mips/mips.h (LIBGCC2_UNWIND_ATTRIBUTE): Define to force
	nomips16 mode when IN_LIBGCC2 with hard float.

Co-Authored-By: Nigel Stephens <nigel@mips.com>

From-SVN: r128501

1 files changed, 24 insertions, 13 deletions

diff --git a/gcc/unwind-generic.h b/gcc/unwind-generic.h
index 4d5d14d..cebd663 100644
--- a/gcc/unwind-generic.h
+++ b/gcc/unwind-generic.h
@@ -108,6 +108,12 @@ typedef int _Unwind_Action;
 #define _UA_FORCE_UNWIND	8
 #define _UA_END_OF_STACK	16
 
+/* The target can override this macro to define any back-end-specific
+   attributes required for the lowest-level stack frame.  */
+#ifndef LIBGCC2_UNWIND_ATTRIBUTE
+#define LIBGCC2_UNWIND_ATTRIBUTE
+#endif
+
 /* This is an opaque type used to refer to a system-specific data
    structure used by the system unwinder. This context is created and
    destroyed by the system, and passed to the personality routine
@@ -115,7 +121,8 @@ typedef int _Unwind_Action;
 struct _Unwind_Context;
 
 /* Raise an exception, passing along the given exception object.  */
-extern _Unwind_Reason_Code _Unwind_RaiseException (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_RaiseException (struct _Unwind_Exception *);
 
 /* Raise an exception for forced unwinding.  */
 
@@ -123,20 +130,21 @@ typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
      (int, _Unwind_Action, _Unwind_Exception_Class,
       struct _Unwind_Exception *, struct _Unwind_Context *, void *);
 
-extern _Unwind_Reason_Code _Unwind_ForcedUnwind (struct _Unwind_Exception *,
-						 _Unwind_Stop_Fn,
-						 void *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
 
 /* Helper to invoke the exception_cleanup routine.  */
 extern void _Unwind_DeleteException (struct _Unwind_Exception *);
 
 /* Resume propagation of an existing exception.  This is used after
    e.g. executing cleanup code, and not to implement rethrowing.  */
-extern void _Unwind_Resume (struct _Unwind_Exception *);
+extern void LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_Resume (struct _Unwind_Exception *);
 
 /* @@@ Resume propagation of an FORCE_UNWIND exception, or to rethrow
    a normal exception that was handled.  */
-extern _Unwind_Reason_Code _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_Resume_or_Rethrow (struct _Unwind_Exception *);
 
 /* @@@ Use unwind data to perform a stack backtrace.  The trace callback
    is called for every stack frame in the call chain, but no cleanup
@@ -144,7 +152,8 @@ extern _Unwind_Reason_Code _Unwind_Resume_or_Rethrow (struct _Unwind_Exception *
 typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)
      (struct _Unwind_Context *, void *);
 
-extern _Unwind_Reason_Code _Unwind_Backtrace (_Unwind_Trace_Fn, void *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_Backtrace (_Unwind_Trace_Fn, void *);
 
 /* These functions are used for communicating information about the unwind
    context (i.e. the unwind descriptors and the user register state) between
@@ -191,12 +200,14 @@ struct SjLj_Function_Context;
 extern void _Unwind_SjLj_Register (struct SjLj_Function_Context *);
 extern void _Unwind_SjLj_Unregister (struct SjLj_Function_Context *);
 
-extern _Unwind_Reason_Code _Unwind_SjLj_RaiseException
-     (struct _Unwind_Exception *);
-extern _Unwind_Reason_Code _Unwind_SjLj_ForcedUnwind
-     (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
-extern void _Unwind_SjLj_Resume (struct _Unwind_Exception *);
-extern _Unwind_Reason_Code _Unwind_SjLj_Resume_or_Rethrow (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_SjLj_RaiseException (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_SjLj_ForcedUnwind (struct _Unwind_Exception *, _Unwind_Stop_Fn, void *);
+extern void LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_SjLj_Resume (struct _Unwind_Exception *);
+extern _Unwind_Reason_Code LIBGCC2_UNWIND_ATTRIBUTE
+_Unwind_SjLj_Resume_or_Rethrow (struct _Unwind_Exception *);
 
 /* @@@ The following provide access to the base addresses for text
    and data-relative addressing in the LDSA.  In order to stay link