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#include "config.h"
11
12
13// static linker symbols to prevent wrong two level namespace for _Unwind symbols
14#if defined(__arm__)
15   #define NOT_HERE_BEFORE_5_0(sym)     \
16       extern const char sym##_tmp30 __asm("$ld$hide$os3.0$_" #sym ); \
17       __attribute__((visibility("default"))) const char sym##_tmp30 = 0; \
18       extern const char sym##_tmp31 __asm("$ld$hide$os3.1$_" #sym ); \
19          __attribute__((visibility("default"))) const char sym##_tmp31 = 0; \
20       extern const char sym##_tmp32 __asm("$ld$hide$os3.2$_" #sym );\
21           __attribute__((visibility("default"))) const char sym##_tmp32 = 0; \
22       extern const char sym##_tmp40 __asm("$ld$hide$os4.0$_" #sym ); \
23          __attribute__((visibility("default"))) const char sym##_tmp40 = 0; \
24       extern const char sym##_tmp41 __asm("$ld$hide$os4.1$_" #sym ); \
25          __attribute__((visibility("default"))) const char sym##_tmp41 = 0; \
26       extern const char sym##_tmp42 __asm("$ld$hide$os4.2$_" #sym ); \
27          __attribute__((visibility("default"))) const char sym##_tmp42 = 0; \
28       extern const char sym##_tmp43 __asm("$ld$hide$os4.3$_" #sym ); \
29          __attribute__((visibility("default"))) const char sym##_tmp43 = 0;
30#elif defined(__aarch64__)
31  #define NOT_HERE_BEFORE_10_6(sym)
32  #define NEVER_HERE(sym)
33#else
34  #define NOT_HERE_BEFORE_10_6(sym) \
35    extern const char sym##_tmp4 __asm("$ld$hide$os10.4$_" #sym ); \
36          __attribute__((visibility("default"))) const char sym##_tmp4 = 0; \
37    extern const char sym##_tmp5 __asm("$ld$hide$os10.5$_" #sym ); \
38          __attribute__((visibility("default"))) const char sym##_tmp5 = 0;
39  #define NEVER_HERE(sym) \
40    extern const char sym##_tmp4 __asm("$ld$hide$os10.4$_" #sym ); \
41          __attribute__((visibility("default"))) const char sym##_tmp4 = 0; \
42    extern const char sym##_tmp5 __asm("$ld$hide$os10.5$_" #sym ); \
43          __attribute__((visibility("default"))) const char sym##_tmp5 = 0; \
44    extern const char sym##_tmp6 __asm("$ld$hide$os10.6$_" #sym ); \
45          __attribute__((visibility("default"))) const char sym##_tmp6 = 0;
46#endif
47
48
49#if defined(_LIBUNWIND_BUILD_ZERO_COST_APIS)
50
51//
52// symbols in libSystem.dylib in 10.6 and later, but are in libgcc_s.dylib in
53// earlier versions
54//
55NOT_HERE_BEFORE_10_6(_Unwind_DeleteException)
56NOT_HERE_BEFORE_10_6(_Unwind_Find_FDE)
57NOT_HERE_BEFORE_10_6(_Unwind_ForcedUnwind)
58NOT_HERE_BEFORE_10_6(_Unwind_GetGR)
59NOT_HERE_BEFORE_10_6(_Unwind_GetIP)
60NOT_HERE_BEFORE_10_6(_Unwind_GetLanguageSpecificData)
61NOT_HERE_BEFORE_10_6(_Unwind_GetRegionStart)
62NOT_HERE_BEFORE_10_6(_Unwind_RaiseException)
63NOT_HERE_BEFORE_10_6(_Unwind_Resume)
64NOT_HERE_BEFORE_10_6(_Unwind_SetGR)
65NOT_HERE_BEFORE_10_6(_Unwind_SetIP)
66NOT_HERE_BEFORE_10_6(_Unwind_Backtrace)
67NOT_HERE_BEFORE_10_6(_Unwind_FindEnclosingFunction)
68NOT_HERE_BEFORE_10_6(_Unwind_GetCFA)
69NOT_HERE_BEFORE_10_6(_Unwind_GetDataRelBase)
70NOT_HERE_BEFORE_10_6(_Unwind_GetTextRelBase)
71NOT_HERE_BEFORE_10_6(_Unwind_Resume_or_Rethrow)
72NOT_HERE_BEFORE_10_6(_Unwind_GetIPInfo)
73NOT_HERE_BEFORE_10_6(__register_frame)
74NOT_HERE_BEFORE_10_6(__deregister_frame)
75
76//
77// symbols in libSystem.dylib for compatibility, but we don't want any new code
78// using them
79//
80NEVER_HERE(__register_frame_info_bases)
81NEVER_HERE(__register_frame_info)
82NEVER_HERE(__register_frame_info_table_bases)
83NEVER_HERE(__register_frame_info_table)
84NEVER_HERE(__register_frame_table)
85NEVER_HERE(__deregister_frame_info)
86NEVER_HERE(__deregister_frame_info_bases)
87
88#endif // defined(_LIBUNWIND_BUILD_ZERO_COST_APIS)
89
90
91
92
93#if defined(_LIBUNWIND_BUILD_SJLJ_APIS)
94//
95// symbols in libSystem.dylib in iOS 5.0 and later, but are in libgcc_s.dylib in
96// earlier versions
97//
98NOT_HERE_BEFORE_5_0(_Unwind_GetLanguageSpecificData)
99NOT_HERE_BEFORE_5_0(_Unwind_GetRegionStart)
100NOT_HERE_BEFORE_5_0(_Unwind_GetIP)
101NOT_HERE_BEFORE_5_0(_Unwind_SetGR)
102NOT_HERE_BEFORE_5_0(_Unwind_SetIP)
103NOT_HERE_BEFORE_5_0(_Unwind_DeleteException)
104NOT_HERE_BEFORE_5_0(_Unwind_SjLj_Register)
105NOT_HERE_BEFORE_5_0(_Unwind_GetGR)
106NOT_HERE_BEFORE_5_0(_Unwind_GetIPInfo)
107NOT_HERE_BEFORE_5_0(_Unwind_GetCFA)
108NOT_HERE_BEFORE_5_0(_Unwind_SjLj_Resume)
109NOT_HERE_BEFORE_5_0(_Unwind_SjLj_RaiseException)
110NOT_HERE_BEFORE_5_0(_Unwind_SjLj_Resume_or_Rethrow)
111NOT_HERE_BEFORE_5_0(_Unwind_SjLj_Unregister)
112
113#endif // defined(_LIBUNWIND_BUILD_SJLJ_APIS)
114