1 | /* -----------------------------------------------------------------*-C-*- |
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2 | libffi 3.4.2 |
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3 | - Copyright (c) 2011, 2014, 2019, 2021 Anthony Green |
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4 | - Copyright (c) 1996-2003, 2007, 2008 Red Hat, Inc. |
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5 | |
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6 | Permission is hereby granted, free of charge, to any person |
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7 | obtaining a copy of this software and associated documentation |
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8 | files (the ``Software''), to deal in the Software without |
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9 | restriction, including without limitation the rights to use, copy, |
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10 | modify, merge, publish, distribute, sublicense, and/or sell copies |
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11 | of the Software, and to permit persons to whom the Software is |
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12 | furnished to do so, subject to the following conditions: |
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13 | |
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14 | The above copyright notice and this permission notice shall be |
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15 | included in all copies or substantial portions of the Software. |
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16 | |
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17 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, |
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18 | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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19 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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20 | NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT |
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21 | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
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22 | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
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23 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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24 | DEALINGS IN THE SOFTWARE. |
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25 | |
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26 | ----------------------------------------------------------------------- */ |
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27 | |
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28 | /* ------------------------------------------------------------------- |
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29 | Most of the API is documented in doc/libffi.texi. |
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30 | |
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31 | The raw API is designed to bypass some of the argument packing and |
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32 | unpacking on architectures for which it can be avoided. Routines |
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33 | are provided to emulate the raw API if the underlying platform |
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34 | doesn't allow faster implementation. |
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35 | |
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36 | More details on the raw API can be found in: |
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37 | |
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38 | http://gcc.gnu.org/ml/java/1999-q3/msg00138.html |
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39 | |
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40 | and |
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41 | |
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42 | http://gcc.gnu.org/ml/java/1999-q3/msg00174.html |
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43 | -------------------------------------------------------------------- */ |
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44 | |
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45 | #ifndef LIBFFI_H |
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46 | #define LIBFFI_H |
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47 | |
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48 | #ifdef __cplusplus |
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49 | extern "C" { |
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50 | #endif |
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51 | |
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52 | /* Specify which architecture libffi is configured for. */ |
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53 | #ifndef AARCH64 |
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54 | #define AARCH64 |
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55 | #endif |
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56 | |
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57 | /* ---- System configuration information --------------------------------- */ |
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58 | |
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59 | #include <ffitarget.h> |
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60 | |
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61 | #ifndef LIBFFI_ASM |
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62 | |
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63 | #if defined(_MSC_VER) && !defined(__clang__) |
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64 | #define __attribute__(X) |
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65 | #endif |
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66 | |
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67 | #include <stddef.h> |
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68 | #include <limits.h> |
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69 | |
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70 | /* LONG_LONG_MAX is not always defined (not if STRICT_ANSI, for example). |
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71 | But we can find it either under the correct ANSI name, or under GNU |
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72 | C's internal name. */ |
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73 | |
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74 | #define FFI_64_BIT_MAX 9223372036854775807 |
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75 | |
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76 | #ifdef LONG_LONG_MAX |
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77 | # define FFI_LONG_LONG_MAX LONG_LONG_MAX |
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78 | #else |
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79 | # ifdef LLONG_MAX |
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80 | # define FFI_LONG_LONG_MAX LLONG_MAX |
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81 | # ifdef _AIX52 /* or newer has C99 LLONG_MAX */ |
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82 | # undef FFI_64_BIT_MAX |
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83 | # define FFI_64_BIT_MAX 9223372036854775807LL |
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84 | # endif /* _AIX52 or newer */ |
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85 | # else |
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86 | # ifdef __GNUC__ |
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87 | # define FFI_LONG_LONG_MAX __LONG_LONG_MAX__ |
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88 | # endif |
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89 | # ifdef _AIX /* AIX 5.1 and earlier have LONGLONG_MAX */ |
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90 | # ifndef __PPC64__ |
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91 | # if defined (__IBMC__) || defined (__IBMCPP__) |
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92 | # define FFI_LONG_LONG_MAX LONGLONG_MAX |
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93 | # endif |
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94 | # endif /* __PPC64__ */ |
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95 | # undef FFI_64_BIT_MAX |
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96 | # define FFI_64_BIT_MAX 9223372036854775807LL |
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97 | # endif |
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98 | # endif |
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99 | #endif |
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100 | |
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101 | /* The closure code assumes that this works on pointers, i.e. a size_t |
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102 | can hold a pointer. */ |
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103 | |
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104 | typedef struct _ffi_type |
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105 | { |
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106 | size_t size; |
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107 | unsigned short alignment; |
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108 | unsigned short type; |
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109 | struct _ffi_type **elements; |
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110 | } ffi_type; |
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111 | |
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112 | /* Need minimal decorations for DLLs to work on Windows. GCC has |
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113 | autoimport and autoexport. Always mark externally visible symbols |
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114 | as dllimport for MSVC clients, even if it means an extra indirection |
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115 | when using the static version of the library. |
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116 | Besides, as a workaround, they can define FFI_BUILDING if they |
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117 | *know* they are going to link with the static library. */ |
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118 | #if defined _MSC_VER |
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119 | # if defined FFI_BUILDING_DLL /* Building libffi.DLL with msvcc.sh */ |
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120 | # define FFI_API __declspec(dllexport) |
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121 | # elif !defined FFI_BUILDING /* Importing libffi.DLL */ |
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122 | # define FFI_API __declspec(dllimport) |
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123 | # else /* Building/linking static library */ |
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124 | # define FFI_API |
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125 | # endif |
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126 | #else |
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127 | # define FFI_API |
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128 | #endif |
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129 | |
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130 | /* The externally visible type declarations also need the MSVC DLL |
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131 | decorations, or they will not be exported from the object file. */ |
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132 | #if defined LIBFFI_HIDE_BASIC_TYPES |
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133 | # define FFI_EXTERN FFI_API |
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134 | #else |
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135 | # define FFI_EXTERN extern FFI_API |
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136 | #endif |
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137 | |
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138 | #ifndef LIBFFI_HIDE_BASIC_TYPES |
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139 | #if SCHAR_MAX == 127 |
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140 | # define ffi_type_uchar ffi_type_uint8 |
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141 | # define ffi_type_schar ffi_type_sint8 |
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142 | #else |
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143 | #error "char size not supported" |
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144 | #endif |
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145 | |
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146 | #if SHRT_MAX == 32767 |
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147 | # define ffi_type_ushort ffi_type_uint16 |
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148 | # define ffi_type_sshort ffi_type_sint16 |
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149 | #elif SHRT_MAX == 2147483647 |
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150 | # define ffi_type_ushort ffi_type_uint32 |
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151 | # define ffi_type_sshort ffi_type_sint32 |
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152 | #else |
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153 | #error "short size not supported" |
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154 | #endif |
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155 | |
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156 | #if INT_MAX == 32767 |
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157 | # define ffi_type_uint ffi_type_uint16 |
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158 | # define ffi_type_sint ffi_type_sint16 |
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159 | #elif INT_MAX == 2147483647 |
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160 | # define ffi_type_uint ffi_type_uint32 |
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161 | # define ffi_type_sint ffi_type_sint32 |
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162 | #elif INT_MAX == 9223372036854775807 |
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163 | # define ffi_type_uint ffi_type_uint64 |
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164 | # define ffi_type_sint ffi_type_sint64 |
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165 | #else |
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166 | #error "int size not supported" |
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167 | #endif |
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168 | |
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169 | #if LONG_MAX == 2147483647 |
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170 | # if FFI_LONG_LONG_MAX != FFI_64_BIT_MAX |
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171 | #error "no 64-bit data type supported" |
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172 | # endif |
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173 | #elif LONG_MAX != FFI_64_BIT_MAX |
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174 | #error "long size not supported" |
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175 | #endif |
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176 | |
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177 | #if LONG_MAX == 2147483647 |
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178 | # define ffi_type_ulong ffi_type_uint32 |
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179 | # define ffi_type_slong ffi_type_sint32 |
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180 | #elif LONG_MAX == FFI_64_BIT_MAX |
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181 | # define ffi_type_ulong ffi_type_uint64 |
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182 | # define ffi_type_slong ffi_type_sint64 |
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183 | #else |
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184 | #error "long size not supported" |
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185 | #endif |
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186 | |
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187 | /* These are defined in types.c. */ |
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188 | FFI_EXTERN ffi_type ffi_type_void; |
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189 | FFI_EXTERN ffi_type ffi_type_uint8; |
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190 | FFI_EXTERN ffi_type ffi_type_sint8; |
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191 | FFI_EXTERN ffi_type ffi_type_uint16; |
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192 | FFI_EXTERN ffi_type ffi_type_sint16; |
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193 | FFI_EXTERN ffi_type ffi_type_uint32; |
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194 | FFI_EXTERN ffi_type ffi_type_sint32; |
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195 | FFI_EXTERN ffi_type ffi_type_uint64; |
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196 | FFI_EXTERN ffi_type ffi_type_sint64; |
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197 | FFI_EXTERN ffi_type ffi_type_float; |
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198 | FFI_EXTERN ffi_type ffi_type_double; |
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199 | FFI_EXTERN ffi_type ffi_type_pointer; |
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200 | |
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201 | #if 0 |
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202 | FFI_EXTERN ffi_type ffi_type_longdouble; |
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203 | #else |
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204 | #define ffi_type_longdouble ffi_type_double |
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205 | #endif |
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206 | |
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207 | #ifdef FFI_TARGET_HAS_COMPLEX_TYPE |
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208 | FFI_EXTERN ffi_type ffi_type_complex_float; |
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209 | FFI_EXTERN ffi_type ffi_type_complex_double; |
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210 | #if 0 |
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211 | FFI_EXTERN ffi_type ffi_type_complex_longdouble; |
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212 | #else |
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213 | #define ffi_type_complex_longdouble ffi_type_complex_double |
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214 | #endif |
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215 | #endif |
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216 | #endif /* LIBFFI_HIDE_BASIC_TYPES */ |
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217 | |
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218 | typedef enum { |
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219 | FFI_OK = 0, |
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220 | FFI_BAD_TYPEDEF, |
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221 | FFI_BAD_ABI, |
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222 | FFI_BAD_ARGTYPE |
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223 | } ffi_status; |
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224 | |
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225 | typedef struct { |
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226 | ffi_abi abi; |
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227 | unsigned nargs; |
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228 | ffi_type **arg_types; |
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229 | ffi_type *rtype; |
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230 | unsigned bytes; |
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231 | unsigned flags; |
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232 | #ifdef FFI_EXTRA_CIF_FIELDS |
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233 | FFI_EXTRA_CIF_FIELDS; |
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234 | #endif |
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235 | } ffi_cif; |
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236 | |
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237 | /* ---- Definitions for the raw API -------------------------------------- */ |
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238 | |
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239 | #ifndef FFI_SIZEOF_ARG |
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240 | # if LONG_MAX == 2147483647 |
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241 | # define FFI_SIZEOF_ARG 4 |
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242 | # elif LONG_MAX == FFI_64_BIT_MAX |
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243 | # define FFI_SIZEOF_ARG 8 |
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244 | # endif |
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245 | #endif |
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246 | |
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247 | #ifndef FFI_SIZEOF_JAVA_RAW |
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248 | # define FFI_SIZEOF_JAVA_RAW FFI_SIZEOF_ARG |
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249 | #endif |
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250 | |
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251 | typedef union { |
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252 | ffi_sarg sint; |
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253 | ffi_arg uint; |
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254 | float flt; |
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255 | char data[FFI_SIZEOF_ARG]; |
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256 | void* ptr; |
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257 | } ffi_raw; |
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258 | |
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259 | #if FFI_SIZEOF_JAVA_RAW == 4 && FFI_SIZEOF_ARG == 8 |
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260 | /* This is a special case for mips64/n32 ABI (and perhaps others) where |
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261 | sizeof(void *) is 4 and FFI_SIZEOF_ARG is 8. */ |
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262 | typedef union { |
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263 | signed int sint; |
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264 | unsigned int uint; |
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265 | float flt; |
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266 | char data[FFI_SIZEOF_JAVA_RAW]; |
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267 | void* ptr; |
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268 | } ffi_java_raw; |
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269 | #else |
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270 | typedef ffi_raw ffi_java_raw; |
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271 | #endif |
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272 | |
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273 | |
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274 | FFI_API |
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275 | void ffi_raw_call (ffi_cif *cif, |
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276 | void (*fn)(void), |
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277 | void *rvalue, |
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278 | ffi_raw *avalue); |
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279 | |
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280 | FFI_API void ffi_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_raw *raw); |
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281 | FFI_API void ffi_raw_to_ptrarray (ffi_cif *cif, ffi_raw *raw, void **args); |
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282 | FFI_API size_t ffi_raw_size (ffi_cif *cif); |
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283 | |
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284 | /* This is analogous to the raw API, except it uses Java parameter |
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285 | packing, even on 64-bit machines. I.e. on 64-bit machines longs |
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286 | and doubles are followed by an empty 64-bit word. */ |
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287 | |
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288 | #if !FFI_NATIVE_RAW_API |
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289 | FFI_API |
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290 | void ffi_java_raw_call (ffi_cif *cif, |
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291 | void (*fn)(void), |
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292 | void *rvalue, |
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293 | ffi_java_raw *avalue) __attribute__((deprecated)); |
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294 | #endif |
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295 | |
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296 | FFI_API |
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297 | void ffi_java_ptrarray_to_raw (ffi_cif *cif, void **args, ffi_java_raw *raw) __attribute__((deprecated)); |
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298 | FFI_API |
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299 | void ffi_java_raw_to_ptrarray (ffi_cif *cif, ffi_java_raw *raw, void **args) __attribute__((deprecated)); |
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300 | FFI_API |
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301 | size_t ffi_java_raw_size (ffi_cif *cif) __attribute__((deprecated)); |
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302 | |
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303 | /* ---- Definitions for closures ----------------------------------------- */ |
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304 | |
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305 | #if FFI_CLOSURES |
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306 | |
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307 | #ifdef _MSC_VER |
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308 | __declspec(align(8)) |
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309 | #endif |
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310 | typedef struct { |
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311 | #if 1 |
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312 | void *trampoline_table; |
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313 | void *trampoline_table_entry; |
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314 | #else |
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315 | union { |
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316 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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317 | void *ftramp; |
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318 | }; |
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319 | #endif |
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320 | ffi_cif *cif; |
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321 | void (*fun)(ffi_cif*,void*,void**,void*); |
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322 | void *user_data; |
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323 | } ffi_closure |
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324 | #ifdef __GNUC__ |
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325 | __attribute__((aligned (8))) |
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326 | #endif |
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327 | ; |
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328 | |
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329 | #ifndef __GNUC__ |
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330 | # ifdef __sgi |
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331 | # pragma pack 0 |
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332 | # endif |
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333 | #endif |
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334 | |
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335 | FFI_API void *ffi_closure_alloc (size_t size, void **code); |
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336 | FFI_API void ffi_closure_free (void *); |
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337 | |
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338 | #if defined(PA_LINUX) || defined(PA_HPUX) |
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339 | #define FFI_CLOSURE_PTR(X) ((void *)((unsigned int)(X) | 2)) |
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340 | #define FFI_RESTORE_PTR(X) ((void *)((unsigned int)(X) & ~3)) |
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341 | #else |
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342 | #define FFI_CLOSURE_PTR(X) (X) |
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343 | #define FFI_RESTORE_PTR(X) (X) |
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344 | #endif |
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345 | |
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346 | FFI_API ffi_status |
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347 | ffi_prep_closure (ffi_closure*, |
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348 | ffi_cif *, |
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349 | void (*fun)(ffi_cif*,void*,void**,void*), |
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350 | void *user_data) |
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351 | #if defined(__GNUC__) && (((__GNUC__ * 100) + __GNUC_MINOR__) >= 405) |
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352 | __attribute__((deprecated ("use ffi_prep_closure_loc instead"))) |
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353 | #elif defined(__GNUC__) && __GNUC__ >= 3 |
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354 | __attribute__((deprecated)) |
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355 | #endif |
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356 | ; |
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357 | |
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358 | FFI_API ffi_status |
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359 | ffi_prep_closure_loc (ffi_closure*, |
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360 | ffi_cif *, |
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361 | void (*fun)(ffi_cif*,void*,void**,void*), |
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362 | void *user_data, |
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363 | void*codeloc); |
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364 | |
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365 | #ifdef __sgi |
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366 | # pragma pack 8 |
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367 | #endif |
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368 | typedef struct { |
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369 | #if 1 |
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370 | void *trampoline_table; |
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371 | void *trampoline_table_entry; |
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372 | #else |
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373 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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374 | #endif |
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375 | ffi_cif *cif; |
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376 | |
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377 | #if !FFI_NATIVE_RAW_API |
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378 | |
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379 | /* If this is enabled, then a raw closure has the same layout |
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380 | as a regular closure. We use this to install an intermediate |
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381 | handler to do the transaltion, void** -> ffi_raw*. */ |
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382 | |
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383 | void (*translate_args)(ffi_cif*,void*,void**,void*); |
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384 | void *this_closure; |
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385 | |
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386 | #endif |
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387 | |
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388 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*); |
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389 | void *user_data; |
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390 | |
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391 | } ffi_raw_closure; |
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392 | |
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393 | typedef struct { |
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394 | #if 1 |
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395 | void *trampoline_table; |
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396 | void *trampoline_table_entry; |
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397 | #else |
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398 | char tramp[FFI_TRAMPOLINE_SIZE]; |
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399 | #endif |
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400 | |
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401 | ffi_cif *cif; |
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402 | |
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403 | #if !FFI_NATIVE_RAW_API |
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404 | |
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405 | /* If this is enabled, then a raw closure has the same layout |
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406 | as a regular closure. We use this to install an intermediate |
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407 | handler to do the translation, void** -> ffi_raw*. */ |
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408 | |
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409 | void (*translate_args)(ffi_cif*,void*,void**,void*); |
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410 | void *this_closure; |
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411 | |
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412 | #endif |
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413 | |
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414 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*); |
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415 | void *user_data; |
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416 | |
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417 | } ffi_java_raw_closure; |
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418 | |
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419 | FFI_API ffi_status |
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420 | ffi_prep_raw_closure (ffi_raw_closure*, |
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421 | ffi_cif *cif, |
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422 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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423 | void *user_data); |
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424 | |
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425 | FFI_API ffi_status |
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426 | ffi_prep_raw_closure_loc (ffi_raw_closure*, |
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427 | ffi_cif *cif, |
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428 | void (*fun)(ffi_cif*,void*,ffi_raw*,void*), |
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429 | void *user_data, |
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430 | void *codeloc); |
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431 | |
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432 | #if !FFI_NATIVE_RAW_API |
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433 | FFI_API ffi_status |
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434 | ffi_prep_java_raw_closure (ffi_java_raw_closure*, |
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435 | ffi_cif *cif, |
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436 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*), |
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437 | void *user_data) __attribute__((deprecated)); |
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438 | |
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439 | FFI_API ffi_status |
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440 | ffi_prep_java_raw_closure_loc (ffi_java_raw_closure*, |
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441 | ffi_cif *cif, |
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442 | void (*fun)(ffi_cif*,void*,ffi_java_raw*,void*), |
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443 | void *user_data, |
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444 | void *codeloc) __attribute__((deprecated)); |
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445 | #endif |
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446 | |
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447 | #endif /* FFI_CLOSURES */ |
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448 | |
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449 | #if FFI_GO_CLOSURES |
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450 | |
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451 | typedef struct { |
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452 | void *tramp; |
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453 | ffi_cif *cif; |
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454 | void (*fun)(ffi_cif*,void*,void**,void*); |
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455 | } ffi_go_closure; |
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456 | |
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457 | FFI_API ffi_status ffi_prep_go_closure (ffi_go_closure*, ffi_cif *, |
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458 | void (*fun)(ffi_cif*,void*,void**,void*)); |
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459 | |
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460 | FFI_API void ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue, |
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461 | void **avalue, void *closure); |
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462 | |
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463 | #endif /* FFI_GO_CLOSURES */ |
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464 | |
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465 | /* ---- Public interface definition -------------------------------------- */ |
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466 | |
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467 | FFI_API |
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468 | ffi_status ffi_prep_cif(ffi_cif *cif, |
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469 | ffi_abi abi, |
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470 | unsigned int nargs, |
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471 | ffi_type *rtype, |
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472 | ffi_type **atypes); |
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473 | |
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474 | FFI_API |
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475 | ffi_status ffi_prep_cif_var(ffi_cif *cif, |
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476 | ffi_abi abi, |
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477 | unsigned int nfixedargs, |
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478 | unsigned int ntotalargs, |
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479 | ffi_type *rtype, |
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480 | ffi_type **atypes); |
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481 | |
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482 | FFI_API |
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483 | void ffi_call(ffi_cif *cif, |
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484 | void (*fn)(void), |
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485 | void *rvalue, |
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486 | void **avalue); |
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487 | |
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488 | FFI_API |
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489 | ffi_status ffi_get_struct_offsets (ffi_abi abi, ffi_type *struct_type, |
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490 | size_t *offsets); |
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491 | |
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492 | /* Useful for eliminating compiler warnings. */ |
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493 | #define FFI_FN(f) ((void (*)(void))f) |
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494 | |
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495 | /* ---- Definitions shared with assembly code ---------------------------- */ |
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496 | |
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497 | #endif |
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498 | |
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499 | /* If these change, update src/mips/ffitarget.h. */ |
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500 | #define FFI_TYPE_VOID 0 |
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501 | #define FFI_TYPE_INT 1 |
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502 | #define FFI_TYPE_FLOAT 2 |
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503 | #define FFI_TYPE_DOUBLE 3 |
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504 | #if 0 |
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505 | #define FFI_TYPE_LONGDOUBLE 4 |
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506 | #else |
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507 | #define FFI_TYPE_LONGDOUBLE FFI_TYPE_DOUBLE |
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508 | #endif |
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509 | #define FFI_TYPE_UINT8 5 |
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510 | #define FFI_TYPE_SINT8 6 |
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511 | #define FFI_TYPE_UINT16 7 |
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512 | #define FFI_TYPE_SINT16 8 |
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513 | #define FFI_TYPE_UINT32 9 |
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514 | #define FFI_TYPE_SINT32 10 |
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515 | #define FFI_TYPE_UINT64 11 |
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516 | #define FFI_TYPE_SINT64 12 |
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517 | #define FFI_TYPE_STRUCT 13 |
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518 | #define FFI_TYPE_POINTER 14 |
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519 | #define FFI_TYPE_COMPLEX 15 |
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520 | |
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521 | /* This should always refer to the last type code (for sanity checks). */ |
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522 | #define FFI_TYPE_LAST FFI_TYPE_COMPLEX |
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523 | |
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524 | #ifdef __cplusplus |
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525 | } |
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526 | #endif |
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527 | |
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528 | #endif |
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