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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_arm32_arm_armhf.c
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6 Description: ARM 'armhf' ABI implementation
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7 License:
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8
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9 Copyright (c) 2007-2015 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 #include "dyncall_callvm_arm32_arm_armhf.h"
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28 #include "dyncall_alloc.h"
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29
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30
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31 static DCCallVM* dc_callvm_new_arm32_armhf(DCCallVM_vt* vt, DCsize size)
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32 {
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33 /* Store at least 16 bytes (4 words) for internal spill area. Assembly code depends on it. */
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34 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)dcAllocMem(sizeof(DCCallVM_arm32_armhf)+size+16);
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35 dc_callvm_base_init(&p->mInterface, vt);
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36 dcVecInit(&p->mVecHead, size);
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37 p->i = 0;
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38 p->s = 0;
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39 p->d = 0;
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40 return (DCCallVM*)p;
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41 }
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42
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43 static void mode(DCCallVM* in_self,DCint mode);
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44
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45 static void deinit(DCCallVM* in_self)
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46 {
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47 dcFreeMem(in_self);
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48 }
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49
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50
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51 static void reset(DCCallVM* in_p)
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52 {
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53 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_p;
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54 p->i = 0;
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55 p->s = 0;
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56 p->d = 0;
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57 dcVecResize(&p->mVecHead, 16);
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58 }
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59
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60 static void a_int(DCCallVM* in_self, DCint x)
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61 {
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62 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_self;
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63 if (p->i < 16) {
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64 * (DCint*) dcVecAt(&p->mVecHead, p->i) = x;
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65 p->i += 4;
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66 } else {
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67 dcVecAppend(&p->mVecHead, &x, sizeof(DCint));
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68 }
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69 }
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70
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71 static void a_bool (DCCallVM* in_self, DCbool x) { a_int(in_self, (DCint)x); }
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72 static void a_char (DCCallVM* in_self, DCchar x) { a_int(in_self, x); }
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73 static void a_short (DCCallVM* in_self, DCshort x) { a_int(in_self, x); }
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74 static void a_long (DCCallVM* in_self, DClong x) { a_int(in_self, x); }
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75 static void a_longlong(DCCallVM* in_self, DClonglong x)
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76 {
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77 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_self;
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78
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79 p->i = (p->i+4) & -8;
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80 if (p->i < 16) {
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81 * (DClonglong*) dcVecAt(&p->mVecHead, p->i) = x;
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82 p->i += 8;
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83 } else {
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84 /* 64 bit values need to be aligned on 8 byte boundaries */
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85 dcVecSkip(&p->mVecHead, dcVecSize(&p->mVecHead) & 4);
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86 dcVecAppend(&p->mVecHead, &x, sizeof(DClonglong));
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87 }
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88 }
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89 static void a_pointer(DCCallVM* in_p, DCpointer x) { a_int(in_p, (DCint) x ); }
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90
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91 static void a_float(DCCallVM* in_p, DCfloat x)
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92 {
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93 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_p;
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94 if (p->s < 16) {
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95 p->S[p->s++] = x;
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96 if (p->d < p->s) {
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97 p->d = (p->s+1) & ~(1U);
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98 } else {
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99 p->s = p->d;
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100 }
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101 } else {
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102 dcVecAppend(&p->mVecHead, &x, sizeof(DCfloat));
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103 }
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104 }
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105
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106 static void a_double(DCCallVM* in_p, DCdouble x)
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107 {
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108 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_p;
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109 if (p->d < 16) {
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110 * (double*) &p->S[p->d] = x;
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111 p->d += 2;
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112 if (!(p->s & 1)) {
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113 /* if s is even it always equals d.
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114 otherwise, s points to an odd float register.
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115 */
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116 p->s = p->d;
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117 }
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118 } else {
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119 p->s = 16;
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120 union {
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121 DCdouble d;
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122 DCchar b[8];
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123 } v; // ,w;
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124 v.d = x;
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125 #if 0
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126 w.b[0] = v.b[7];
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127 w.b[1] = v.b[6];
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128 w.b[2] = v.b[5];
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129 w.b[3] = v.b[4];
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130 w.b[4] = v.b[3];
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131 w.b[5] = v.b[2];
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132 w.b[6] = v.b[1];
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133 w.b[7] = v.b[0];
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134 #endif
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135 /* 64 bit values need to be aligned on 8 byte boundaries */
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136 dcVecSkip(&p->mVecHead, dcVecSize(&p->mVecHead) & 4);
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137 dcVecAppend(&p->mVecHead, &v.b[0], sizeof(DCdouble));
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138 }
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139 }
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140
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141 void call(DCCallVM* in_p, DCpointer target)
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142 {
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143 DCCallVM_arm32_armhf* p = (DCCallVM_arm32_armhf*)in_p;
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144 dcCall_arm32_armhf(target, dcVecData(&p->mVecHead), dcVecSize(&p->mVecHead), &p->S[0]);
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145 }
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146
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147 DCCallVM_vt vt_armhf =
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148 {
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149 &deinit
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150 , &reset
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151 , &mode
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152 , &a_bool
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153 , &a_char
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154 , &a_short
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155 , &a_int
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156 , &a_long
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157 , &a_longlong
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158 , &a_float
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159 , &a_double
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160 , &a_pointer
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161 , NULL /* argStruct */
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162 , (DCvoidvmfunc*) &call
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163 , (DCboolvmfunc*) &call
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164 , (DCcharvmfunc*) &call
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165 , (DCshortvmfunc*) &call
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166 , (DCintvmfunc*) &call
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167 , (DClongvmfunc*) &call
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168 , (DClonglongvmfunc*) &call
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169 , (DCfloatvmfunc*) &call
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170 , (DCdoublevmfunc*) &call
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171 , (DCpointervmfunc*) &call
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172 , NULL /* callStruct */
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173 };
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174
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175 DCCallVM* dcNewCallVM(DCsize size)
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176 {
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177 #if defined(DC__ABI_ARM_EABI)
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178 return dc_callvm_new_arm32_arm(&eabi, size);
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179 #elif defined(DC__ABI_ARM_HF)
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180 return dc_callvm_new_arm32_armhf(&vt_armhf, size);
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181 #elif defined(DC__ABI_ARM_OABI)
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182 return dc_callvm_new_arm32_arm(&oabi, size);
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183 #else
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184 #error unknown ARM abi
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185 #endif
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186 }
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187
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188 static void mode(DCCallVM* in_self,DCint mode)
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189 {
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190 DCCallVM_arm32_armhf* self = (DCCallVM_arm32_armhf*) in_self;
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191 DCCallVM_vt* vt;
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192 switch(mode) {
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193 case DC_CALL_C_DEFAULT:
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194 case DC_CALL_C_ELLIPSIS:
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195 case DC_CALL_C_ELLIPSIS_VARARGS:
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196 case DC_CALL_C_ARM_ARMHF:
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197 vt = &vt_armhf;
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198 break;
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199 default:
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200 in_self->mError = DC_ERROR_UNSUPPORTED_MODE;
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201 return;
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202 }
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203 self->mInterface.mVTpointer = vt;
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204 }
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205
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