libunwind/src/Unwind-EHABI.h

   1 //===----------------------------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #ifndef __UNWIND_EHABI_H__
  11 #define __UNWIND_EHABI_H__
  12
  13 #include <__libunwind_config.h>
  14
  15 #if defined(_LIBUNWIND_ARM_EHABI)
  16
  17 #include <stdint.h>
  18 #include <unwind.h>
  19
  20 // Unable to unwind in the ARM index table (section 5 EHABI).
  21 #define UNW_EXIDX_CANTUNWIND 0x1
  22
  23 static inline uint32_t signExtendPrel31(uint32_t data) {
  24   return data | ((data & 0x40000000u) << 1);
  25 }
  26
  27 static inline uint32_t readPrel31(const uint32_t *data) {
  28   return (((uint32_t)(uintptr_t)data) + signExtendPrel31(*data));
  29 }
  30
  31 #if defined(__cplusplus)
  32 extern "C" {
  33 #endif
  34
  35 extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr0(
  36     _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
  37
  38 extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr1(
  39     _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
  40
  41 extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr2(
  42     _Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
  43
  44 #if defined(__cplusplus)
  45 } // extern "C"
  46 #endif
  47
  48 #endif // defined(_LIBUNWIND_ARM_EHABI)
  49
  50 #endif  // __UNWIND_EHABI_H__