libkern/kxld/kxld_demangle.c

   1 /*
   2  * Copyright (c) 2009 Apple Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #if !KERNEL
  30
  31 #include <stdlib.h>
  32
  33 /* This demangler is part of the C++ ABI.  We don't include it directly from
  34  * <cxxabi.h> so that we can avoid using C++ in the kernel linker.
  35  */
  36 extern char *
  37 __cxa_demangle(const char* __mangled_name, char* __output_buffer,
  38                size_t* __length, int* __status);
  39
  40 #endif /* !KERNEL */
  41
  42 #include "kxld_demangle.h"
  43
  44 /*******************************************************************************
  45 *******************************************************************************/
  46 const char *
  47 kxld_demangle(const char *str, char **buffer __unused, size_t *length __unused)
  48 {
  49 #if KERNEL
  50     return str;
  51 #else
  52     const char *rval = NULL;
  53     char *demangled = NULL;
  54     int status;
  55
  56     rval = str;
  57
  58     if (!buffer || !length) goto finish;
  59
  60     /* Symbol names in the symbol table have an extra '_' prepended to them,
  61      * so we skip the first character to make the demangler happy.
  62      */
  63     demangled = __cxa_demangle(str+1, *buffer, length, &status);
  64     if (!demangled || status) goto finish;
  65
  66     *buffer = demangled;
  67     rval = demangled;
  68 finish:
  69     return rval;
  70 #endif
  71 }
  72