1 files changed, 123 insertions, 0 deletions
diff --git a/libdwarf/dwarf_child.c b/libdwarf/dwarf_child.c
new file mode 100644
index 00000000..ee9c8336
--- /dev/null
+++ b/libdwarf/dwarf_child.c
@@ -0,0 +1,123 @@
+/* Return child of die.
+   Copyright (C) 2000, 2001, 2002 Red Hat, Inc.
+   Written by Ulrich Drepper <drepper@redhat.com>, 2000.
+
+   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 <stdlib.h>
+
+#include <libdwarfP.h>
+
+
+int
+dwarf_child (die, return_kid, error)
+     Dwarf_Die die;
+     Dwarf_Die *return_kid;
+     Dwarf_Error *error;
+{
+  Dwarf_Debug dbg = die->cu->dbg;
+  Dwarf_Abbrev abbrev;
+  Dwarf_Small *attrp;
+  Dwarf_Small *die_addr;
+  Dwarf_Word u128;
+  Dwarf_Die new_die;
+
+  if (! die->abbrev->has_children)
+    return DW_DLV_NO_ENTRY;
+
+  /* Address of the given die.  */
+  die_addr = die->addr;
+
+  /* Get abbrev code.  */
+  get_uleb128 (u128, die_addr);
+  /*  And get the abbreviation itself.  */
+  abbrev = __libdwarf_get_abbrev (dbg, die->cu, u128, error);
+  if (abbrev == NULL)
+    return DW_DLV_ERROR;
+
+  /* This is where the attributes start.  */
+  attrp = abbrev->attrp;
+
+  /* Skip over the attributes of the given die.  */
+  while (1)
+    {
+      Dwarf_Word attr_name;
+      Dwarf_Word attr_form;
+
+      /* Are we still in bounds?  */
+      if (unlikely (attrp
+		    >= ((Dwarf_Small *)dbg->sections[IDX_debug_abbrev].addr
+			+ dbg->sections[IDX_debug_abbrev].size)))
+	{
+	  __libdwarf_error (dbg, error, DW_E_INVALID_DWARF);
+	  return DW_DLV_ERROR;
+	}
+
+      /* Get attribute name and form.
+
+	 XXX We don't check whether this reads beyond the end of the
+	 section.  */
+      get_uleb128 (attr_name, attrp);
+      get_uleb128 (attr_form, attrp);
+
+      /* We can stop if we found the attribute with value zero.  */
+      if (attr_name == 0 && attr_form == 0)
+	break;
+
+      /* Skip over the rest of this attribute (if there is any).  */
+      if (attr_form != 0)
+	{
+	  size_t len;
+
+	  if (unlikely (__libdwarf_form_val_len (dbg, die->cu, attr_form,
+						 die_addr, &len, error)
+			!= DW_DLV_OK))
+	    return DW_DLV_ERROR;
+
+	  die_addr += len;
+	}
+    }
+
+  /* Allocate the die structure for the result.  */
+  new_die = (Dwarf_Die) malloc (sizeof (struct Dwarf_Die_s));
+  if (new_die == NULL)
+    {
+      __libdwarf_error (dbg, error, DW_E_NOMEM);
+      return DW_DLV_ERROR;
+    }
+#ifdef DWARF_DEBUG
+  new_die->memtag = DW_DLA_DIE;
+#endif
+
+  /* Remember the address.  */
+  new_die->addr = die_addr;
+
+  /* And the compile unit.  */
+  new_die->cu = die->cu;
+
+  /* 7.5.2  Debugging Information Entry
+
+     Each debugging information entry begins with an unsigned LEB128
+     number containing the abbreviation code for the entry.  */
+  get_uleb128 (u128, die_addr);
+
+  /* Find the abbreviation.  */
+  new_die->abbrev = __libdwarf_get_abbrev (dbg, die->cu, u128, error);
+  if (new_die->abbrev == NULL)
+    return DW_DLV_ERROR;
+
+  *return_kid = new_die;
+  return DW_DLV_OK;
+}