1 files changed, 94 insertions, 0 deletions
diff --git a/libdw/dwarf_getattrs.c b/libdw/dwarf_getattrs.c
new file mode 100644
index 00000000..4ead80cc
--- /dev/null
+++ b/libdw/dwarf_getattrs.c
@@ -0,0 +1,94 @@
+/* Get attributes of the DIE.
+   Copyright (C) 2004 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2004.
+
+   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 "libdwP.h"
+
+
+ptrdiff_t
+dwarf_getattrs (Dwarf_Die *die, int (*callback) (Dwarf_Attribute *, void *),
+		void *arg, ptrdiff_t offset)
+{
+  if (die == NULL)
+    return -1l;
+
+  unsigned char *die_addr = die->addr;
+
+  /* Get the abbreviation code.  */
+  unsigned int u128;
+  get_uleb128 (u128, die_addr);
+
+  if (die->abbrev == NULL)
+    /* Find the abbreviation.  */
+    die->abbrev = __libdw_findabbrev (die->cu, u128);
+
+  if (die->abbrev == (Dwarf_Abbrev *) -1l)
+    {
+      __libdw_seterrno (DWARF_E_INVALID_DWARF);
+      return -1l;
+    }
+
+  /* This is where the attributes start.  */
+  unsigned char *attrp = die->abbrev->attrp + offset;
+
+  /* Go over the list of attributes.  */
+  Dwarf *dbg = die->cu->dbg;
+  while (1)
+    {
+      /* Are we still in bounds?  */
+      if (unlikely (attrp
+		    >= ((unsigned char *) dbg->sectiondata[IDX_debug_abbrev]->d_buf
+			+ dbg->sectiondata[IDX_debug_abbrev]->d_size)))
+	{
+	  __libdw_seterrno (DWARF_E_INVALID_DWARF);
+	  return -1;
+	}
+
+      /* Get attribute name and form.  */
+      Dwarf_Attribute attr;
+      // XXX Fix bound checks
+      get_uleb128 (attr.code, attrp);
+      get_uleb128 (attr.form, attrp);
+
+      /* We can stop if we found the attribute with value zero.  */
+      if (attr.code == 0 && attr.form == 0)
+        return 0;
+
+      /* Fill in the rest.  */
+      attr.valp = die_addr;
+      attr.cu = die->cu;
+
+      /* Now call the callback function.  */
+      if (callback (&attr, arg) != DWARF_CB_OK)
+	return attrp - die->abbrev->attrp;
+
+      /* Skip over the rest of this attribute (if there is any).  */
+      if (attr.form != 0)
+	{
+	  size_t len = __libdw_form_val_len (dbg, die->cu, attr.form,
+					     die_addr);
+
+	  if (unlikely (len == (size_t) -1l))
+	    /* Something wrong with the file.  */
+	    return -1l;
+
+	  // XXX We need better boundary checks.
+	  die_addr += len;
+	}
+    }
+  /* NOTREACHED */
+}