Adjust for monotone.

1 files changed, 58 insertions, 0 deletions

diff --git a/libdw/dwarf_formstring.c b/libdw/dwarf_formstring.c
new file mode 100644
index 00000000..eac1cc05
--- /dev/null
+++ b/libdw/dwarf_formstring.c
@@ -0,0 +1,58 @@
+/* Return string associated with given attribute.
+   Copyright (C) 2003, 2004, 2005 Red Hat, Inc.
+   Written by Ulrich Drepper <[email protected]>, 2003.
+
+   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 <dwarf.h>
+#include "libdwP.h"
+
+
+const char *
+dwarf_formstring (attrp)
+     Dwarf_Attribute *attrp;
+{
+  /* Ignore earlier errors.  */
+  if (attrp == NULL)
+    return NULL;
+
+  /* We found it.  Now determine where the string is stored.  */
+  if (attrp->form == DW_FORM_string)
+    /* A simple inlined string.  */
+    return (const char *) attrp->valp;
+
+  Dwarf *dbg = attrp->cu->dbg;
+
+  if (unlikely (attrp->form != DW_FORM_strp)
+      || dbg->sectiondata[IDX_debug_str] == NULL)
+    {
+    invalid_error:
+      __libdw_seterrno (DWARF_E_NO_STRING);
+      return NULL;
+    }
+
+  uint64_t off;
+  // XXX We need better boundary checks.
+  if (attrp->cu->offset_size == 8)
+    off = read_8ubyte_unaligned (dbg, attrp->valp);
+  else
+    off = read_4ubyte_unaligned (dbg, attrp->valp);
+
+  if (off  >= dbg->sectiondata[IDX_debug_str]->d_size)
+    goto invalid_error;
+
+  return (const char *) dbg->sectiondata[IDX_debug_str]->d_buf + off;
+}
+INTDEF(dwarf_formstring)