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third_party: Add libunwind (#1053)

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Added libunwind from LLVM 17.0.6.
The library includes functions required for C++ exception handling.
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Trung Nguyen 2024-01-06 15:04:30 +07:00 • committed by GitHub
parent 91de6f1f5d
commit b09096691a
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50
third_party/libunwind/Unwind-EHABI.h vendored Normal file
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//
//===----------------------------------------------------------------------===//
#ifndef __UNWIND_EHABI_H__
#define __UNWIND_EHABI_H__
#include "third_party/libunwind/include/__libunwind_config.h"
#if defined(_LIBUNWIND_ARM_EHABI)
#include "libc/isystem/stdint.h"
#include "third_party/libunwind/include/unwind.h"
// Unable to unwind in the ARM index table (section 5 EHABI).
#define UNW_EXIDX_CANTUNWIND 0x1
static inline uint32_t signExtendPrel31(uint32_t data) {
return data | ((data & 0x40000000u) << 1);
}
static inline uint32_t readPrel31(const uint32_t *data) {
return (((uint32_t)(uintptr_t)data) + signExtendPrel31(*data));
}
#if defined(__cplusplus)
extern "C" {
#endif
extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr0(
_Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr1(
_Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
extern _Unwind_Reason_Code __aeabi_unwind_cpp_pr2(
_Unwind_State state, _Unwind_Control_Block *ucbp, _Unwind_Context *context);
#if defined(__cplusplus)
} // extern "C"
#endif
#endif // defined(_LIBUNWIND_ARM_EHABI)
#endif // __UNWIND_EHABI_H__