1 files changed, 72 insertions, 0 deletions
diff --git a/libdw/dwarf_func_file.c b/libdw/dwarf_func_file.c
new file mode 100644
index 00000000..d5302df0
--- /dev/null
+++ b/libdw/dwarf_func_file.c
@@ -0,0 +1,72 @@
+/* Return file name containing definition of the given function.
+   Copyright (C) 2005 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2005.
+
+   This program is Open Source software; you can redistribute it and/or
+   modify it under the terms of the Open Software License version 1.0 as
+   published by the Open Source Initiative.
+
+   You should have received a copy of the Open Software License along
+   with this program; if not, you may obtain a copy of the Open Software
+   License version 1.0 from http://www.opensource.org/licenses/osl.php or
+   by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
+   3001 King Ranch Road, Ukiah, CA 95482.   */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <dwarf.h>
+#include "libdwP.h"
+
+
+const char *
+dwarf_func_file (Dwarf_Func *func)
+{
+  Dwarf_Attribute attr_mem;
+  Dwarf_Sword idx = 0;
+  Dwarf_Die *die = func->die;
+
+  if (INTUSE(dwarf_formsdata) (INTUSE(dwarf_attr) (die, DW_AT_decl_file,
+						   &attr_mem), &idx) != 0)
+    return NULL;
+
+  /* Zero means no source file information available.  */
+  if (idx == 0)
+    {
+      __libdw_seterrno (DWARF_E_NO_ENTRY);
+      return NULL;
+    }
+
+  /* Get the array of source files for the CU.  */
+  struct Dwarf_CU  *cu = die->cu;
+  if (cu->lines == NULL)
+    {
+      Dwarf_Lines *lines;
+      size_t nlines;
+
+      /* Let the more generic function do the work.  It'll create more
+	 data but that will be needed in an real program anyway.  */
+      (void) INTUSE(dwarf_getsrclines) (func->cudie, &lines, &nlines);
+      assert (cu->lines != NULL);
+    }
+
+  if (cu->lines == (void *) -1l)
+    {
+      /* If the file index is not zero, there must be file information
+	 available.  */
+      __libdw_seterrno (DWARF_E_INVALID_DWARF);
+      return NULL;
+    }
+
+  assert (cu->files != NULL && cu->files != (void *) -1l);
+
+  if (idx >= cu->files->nfiles)
+    {
+      __libdw_seterrno (DWARF_E_INVALID_DWARF);
+      return NULL;
+    }
+
+  return cu->files->info[idx].name;
+}