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1 /*
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2
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3 Package: dyncall
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4 Library: dyncall
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5 File: dyncall/dyncall_callvm_x64.c
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6 Description:
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7 License:
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8
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339
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9 Copyright (c) 2007-2020 Daniel Adler <dadler@uni-goettingen.de>,
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10 Tassilo Philipp <tphilipp@potion-studios.com>
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11
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12 Permission to use, copy, modify, and distribute this software for any
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13 purpose with or without fee is hereby granted, provided that the above
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14 copyright notice and this permission notice appear in all copies.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23
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24 */
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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 /* MS Windows x64 calling convention, AMD64 SystemV ABI. */
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30
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31
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32 #include "dyncall_callvm_x64.h"
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33 #include "dyncall_alloc.h"
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34 #include "dyncall_struct.h"
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35
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36
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37 static void dc_callvm_free_x64(DCCallVM* in_self)
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38 {
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39 dcFreeMem(in_self);
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40 }
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41
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42
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43 static void dc_callvm_reset_x64(DCCallVM* in_self)
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44 {
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45 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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46 dcVecReset(&self->mVecHead);
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84
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47 self->mRegCount.i = self->mRegCount.f = 0;
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0
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48 }
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49
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50
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51 static void dc_callvm_argLongLong_x64(DCCallVM* in_self, DClonglong x)
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52 {
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53 /* A long long always has 64 bits on the supported x64 platforms (lp64 on unix and llp64 on windows). */
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54 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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55 if(self->mRegCount.i < numIntRegs)
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56 self->mRegData.i[self->mRegCount.i++] = x;
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57 else
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58 dcVecAppend(&self->mVecHead, &x, sizeof(DClonglong));
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59 }
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60
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61
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62 static void dc_callvm_argBool_x64(DCCallVM* in_self, DCbool x)
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63 {
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64 dc_callvm_argLongLong_x64(in_self, (DClonglong)x);
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65 }
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66
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67
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68 static void dc_callvm_argChar_x64(DCCallVM* in_self, DCchar x)
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69 {
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70 dc_callvm_argLongLong_x64(in_self, x);
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71 }
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72
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73
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74 static void dc_callvm_argShort_x64(DCCallVM* in_self, DCshort x)
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75 {
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76 dc_callvm_argLongLong_x64(in_self, x);
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77 }
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78
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79
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80 static void dc_callvm_argInt_x64(DCCallVM* in_self, DCint x)
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81 {
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82 dc_callvm_argLongLong_x64(in_self, x);
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83 }
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84
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85
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86 static void dc_callvm_argLong_x64(DCCallVM* in_self, DClong x)
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87 {
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88 dc_callvm_argLongLong_x64(in_self, x);
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89 }
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90
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91
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92 static void dc_callvm_argFloat_x64(DCCallVM* in_self, DCfloat x)
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93 {
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94 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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95
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96 /* Although not promoted to doubles, floats are stored with 64bits in this API.*/
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97 union {
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98 DCdouble d;
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99 DCfloat f;
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100 } f;
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101 f.f = x;
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102
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103 if(self->mRegCount.f < numFloatRegs)
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104 *(DCfloat*)&self->mRegData.f[self->mRegCount.f++] = x;
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105 else
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106 dcVecAppend(&self->mVecHead, &f.f, sizeof(DCdouble));
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107 }
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108
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109
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110 static void dc_callvm_argDouble_x64(DCCallVM* in_self, DCdouble x)
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111 {
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112 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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113 if(self->mRegCount.f < numFloatRegs)
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114 self->mRegData.f[self->mRegCount.f++] = x;
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115 else
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116 dcVecAppend(&self->mVecHead, &x, sizeof(DCdouble));
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117 }
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118
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119
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120 static void dc_callvm_argPointer_x64(DCCallVM* in_self, DCpointer x)
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121 {
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122 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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123 if(self->mRegCount.i < numIntRegs)
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124 *(DCpointer*)&self->mRegData.i[self->mRegCount.i++] = x;
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125 else
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126 dcVecAppend(&self->mVecHead, &x, sizeof(DCpointer));
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127 }
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128
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129 static void dc_callvm_argStruct_x64(DCCallVM* in_self, DCstruct* s, DCpointer x)
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130 {
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131 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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132 dcVecAppend(&self->mVecHead, x, s->size);
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133 /*printf("dc_callvm_argStruct_x64 size = %d\n", (int)s->size);@@@*/
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134 if (s->size <= 64)
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135 dcArgStructUnroll(in_self, s, x);
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136 /*else@@@*/
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137 /* dcVecAppend(&self->mVecHead, &x, sizeof(DCpointer));@@@*/
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138 }
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139
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140
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141 /* Call. */
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142 void dc_callvm_call_x64(DCCallVM* in_self, DCpointer target)
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143 {
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144 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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145 #if defined(DC_UNIX)
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146 dcCall_x64_sysv(
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147 #else
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148 dcCall_x64_win64(
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149 #endif
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150 dcVecSize(&self->mVecHead), /* Size of stack data. */
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151 dcVecData(&self->mVecHead), /* Pointer to stack arguments. */
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152 self->mRegData.i, /* Pointer to register arguments (ints on SysV). */
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153 #if defined(DC_UNIX)
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154 self->mRegData.f, /* Pointer to floating point register arguments. */
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155 #endif
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156 target
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157 );
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158 }
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159
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160
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84
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161 static void dc_callvm_mode_x64(DCCallVM* in_self, DCint mode);
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162
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0
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163 DCCallVM_vt gVT_x64 =
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164 {
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165 &dc_callvm_free_x64
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166 , &dc_callvm_reset_x64
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167 , &dc_callvm_mode_x64
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168 , &dc_callvm_argBool_x64
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169 , &dc_callvm_argChar_x64
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339
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170 , &dc_callvm_argShort_x64
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171 , &dc_callvm_argInt_x64
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172 , &dc_callvm_argLong_x64
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173 , &dc_callvm_argLongLong_x64
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174 , &dc_callvm_argFloat_x64
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175 , &dc_callvm_argDouble_x64
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176 , &dc_callvm_argPointer_x64
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177 , &dc_callvm_argStruct_x64
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178 , (DCvoidvmfunc*) &dc_callvm_call_x64
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179 , (DCboolvmfunc*) &dc_callvm_call_x64
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180 , (DCcharvmfunc*) &dc_callvm_call_x64
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181 , (DCshortvmfunc*) &dc_callvm_call_x64
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182 , (DCintvmfunc*) &dc_callvm_call_x64
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183 , (DClongvmfunc*) &dc_callvm_call_x64
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184 , (DClonglongvmfunc*) &dc_callvm_call_x64
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185 , (DCfloatvmfunc*) &dc_callvm_call_x64
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186 , (DCdoublevmfunc*) &dc_callvm_call_x64
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187 , (DCpointervmfunc*) &dc_callvm_call_x64
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188 , NULL /* callStruct */
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189 };
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190
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339
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191
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192 /* --- syscall ------------------------------------------------------------- */
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193
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194 #include <assert.h>
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341
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195 void dc_callvm_call_x64_syscall_sysv(DCCallVM* in_self, DCpointer target)
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196 {
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347
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197 DCCallVM_x64* self;
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198
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199 /* syscalls can have up to 6 args, required to be "Only values of class INTEGER or class MEMORY" (from */
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347
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200 /* SysV manual), so we can use self->mRegData.i directly; verify this has space for at least 6 values, though. */
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201 assert(numIntRegs >= 6);
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202
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203 self = (DCCallVM_x64*)in_self;
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204 dcCall_x64_syscall_sysv(self->mRegData.i, target);
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205 }
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206
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341
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207 DCCallVM_vt gVT_x64_syscall_sysv =
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339
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208 {
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209 &dc_callvm_free_x64
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210 , &dc_callvm_reset_x64
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211 , &dc_callvm_mode_x64
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212 , &dc_callvm_argBool_x64
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213 , &dc_callvm_argChar_x64
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214 , &dc_callvm_argShort_x64
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215 , &dc_callvm_argInt_x64
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216 , &dc_callvm_argLong_x64
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217 , &dc_callvm_argLongLong_x64
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218 , &dc_callvm_argFloat_x64
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219 , &dc_callvm_argDouble_x64
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220 , &dc_callvm_argPointer_x64
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221 , NULL /* argStruct */
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341
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222 , (DCvoidvmfunc*) &dc_callvm_call_x64_syscall_sysv
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223 , (DCboolvmfunc*) &dc_callvm_call_x64_syscall_sysv
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224 , (DCcharvmfunc*) &dc_callvm_call_x64_syscall_sysv
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225 , (DCshortvmfunc*) &dc_callvm_call_x64_syscall_sysv
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226 , (DCintvmfunc*) &dc_callvm_call_x64_syscall_sysv
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227 , (DClongvmfunc*) &dc_callvm_call_x64_syscall_sysv
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228 , (DClonglongvmfunc*) &dc_callvm_call_x64_syscall_sysv
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229 , (DCfloatvmfunc*) &dc_callvm_call_x64_syscall_sysv
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230 , (DCdoublevmfunc*) &dc_callvm_call_x64_syscall_sysv
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231 , (DCpointervmfunc*) &dc_callvm_call_x64_syscall_sysv
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339
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232 , NULL /* callStruct */
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233 };
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234
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235
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236
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237 /* mode */
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238
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239 static void dc_callvm_mode_x64(DCCallVM* in_self, DCint mode)
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240 {
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241 DCCallVM_x64* self = (DCCallVM_x64*)in_self;
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242 DCCallVM_vt* vt;
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0
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243
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244 switch(mode) {
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245 case DC_CALL_C_DEFAULT:
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246 #if defined(DC_UNIX)
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247 case DC_CALL_C_X64_SYSV:
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248 #else
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249 case DC_CALL_C_X64_WIN64:
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250 #endif
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251 case DC_CALL_C_ELLIPSIS:
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252 case DC_CALL_C_ELLIPSIS_VARARGS:
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253 vt = &gVT_x64;
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254 break;
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339
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255 case DC_CALL_SYS_DEFAULT:
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256 # if defined DC_UNIX
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257 case DC_CALL_SYS_X64_SYSCALL_SYSV:
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341
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258 vt = &gVT_x64_syscall_sysv; break;
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259 # else
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260 self->mInterface.mError = DC_ERROR_UNSUPPORTED_MODE; return;
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261 # endif
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262 default:
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263 self->mInterface.mError = DC_ERROR_UNSUPPORTED_MODE;
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264 return;
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265 }
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266 dc_callvm_base_init(&self->mInterface, vt);
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267 }
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268
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269 /* Public API. */
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270 DCCallVM* dcNewCallVM(DCsize size)
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271 {
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272 DCCallVM_x64* p = (DCCallVM_x64*)dcAllocMem(sizeof(DCCallVM_x64)+size);
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273
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274 dc_callvm_mode_x64((DCCallVM*)p, DC_CALL_C_DEFAULT);
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275
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276 /* Since we store register parameters in DCCallVM_x64 directly, adjust the stack size. */
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277 size -= sizeof(DCRegData_x64);
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278 size = (((signed long)size) < 0) ? 0 : size;
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279 dcVecInit(&p->mVecHead, size);
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280 dc_callvm_reset_x64((DCCallVM*)p);
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281
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282 return (DCCallVM*)p;
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0
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283 }
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284
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