Update.

2000-01-05  Philip Blundell  <philb@gnu.org>

	* sysdeps/arm/frame.h: New file.
	* sysdeps/generic/frame.h: Likewise.
	* sysdeps/generic/segfault.c (struct layout): Delete definition;
	include the above file instead.
	* sysdeps/generic/backtrace.c (struct layout): Likewise.
	(__backtrace): Use ADVANCE_STACK_FRAME.
	* sysdeps/unix/sysv/linux/arm/sigcontextinfo.h
	(ADVANCE_STACK_FRAME): New macro.
	(GET_FRAME): Apply above to returned value.

	* sysdeps/unix/sysv/linux/arm/bits/armsigctx.h: Add `fault_address'.

3 files changed, 35 insertions, 15 deletions

diff --git a/sysdeps/generic/backtrace.c b/sysdeps/generic/backtrace.c
index 2d329e19cf..3eae3f44f7 100644
--- a/sysdeps/generic/backtrace.c
+++ b/sysdeps/generic/backtrace.c
@@ -19,7 +19,8 @@
    Boston, MA 02111-1307, USA.  */
 
 #include <execinfo.h>
-
+#include <frame.h>
+#include <sigcontextinfo.h>
 
 /* This is a global variable set at program start time.  It marks the
    highest used stack address.  */
@@ -49,11 +50,11 @@ extern void *__libc_stack_end;
 # define INNER_THAN <
 #endif
 
-struct layout
-{
-  struct layout *next;
-  void *return_address;
-};
+/* By default assume the `next' pointer in struct layout points to the
+   next struct layout.  */
+#ifndef ADVANCE_STACK_FRAME
+# define ADVANCE_STACK_FRAME(next) ((struct layout *) (next))
+#endif
 
 int
 __backtrace (array, size)
@@ -81,7 +82,7 @@ __backtrace (array, size)
 
       array[cnt++] = current->return_address;
 
-      current = current->next;
+      current = ADVANCE_STACK_FRAME (current->next);
     }
 
   return cnt;
diff --git a/sysdeps/generic/frame.h b/sysdeps/generic/frame.h
new file mode 100644
index 0000000000..7ad7a64aab
--- /dev/null
+++ b/sysdeps/generic/frame.h
@@ -0,0 +1,24 @@
+/* Definition of stack frame structure.  Generic version.
+   Copyright (C) 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+struct layout
+{
+  void *next;
+  void *return_address;
+};
diff --git a/sysdeps/generic/segfault.c b/sysdeps/generic/segfault.c
index b1bb178d7a..41e3aa54d8 100644
--- a/sysdeps/generic/segfault.c
+++ b/sysdeps/generic/segfault.c
@@ -28,6 +28,9 @@
 #include <unistd.h>
 #include <stdio-common/_itoa.h>
 
+/* Get the definition of "struct layout".  */
+#include <frame.h>
+
 /* This file defines macros to access the content of the sigcontext element
    passed up by the signal handler.  */
 #include <sigcontextinfo.h>
@@ -72,14 +75,6 @@ extern void *__libc_stack_end;
 /* We'll use tis a lot.  */
 #define WRITE_STRING(s) write (fd, s, strlen (s))
 
-
-struct layout
-{
-  void *next;
-  void *return_address;
-};
-
-
 /* Name of the output file.  */
 static const char *fname;