1 | // |
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2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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3 | // |
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4 | // The contents of this file are covered under the licence agreement in the |
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5 | // file "LICENCE" distributed with Cforall. |
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6 | // |
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7 | // invoke.h -- |
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8 | // |
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9 | // Author : Thierry Delisle |
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10 | // Created On : Tue Jan 17 12:27:26 2016 |
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11 | // Last Modified By : Peter A. Buhr |
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12 | // Last Modified On : Fri Mar 30 22:33:59 2018 |
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13 | // Update Count : 30 |
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14 | // |
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15 | |
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16 | #include "bits/containers.h" |
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17 | #include "bits/defs.h" |
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18 | #include "bits/locks.h" |
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19 | |
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20 | #define TL_GET( member ) kernelThreadData.member |
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21 | #define TL_SET( member, value ) kernelThreadData.member = value; |
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22 | |
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23 | #ifdef __cforall |
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24 | extern "C" { |
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25 | #endif |
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26 | |
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27 | #if ! defined(__CFA_INVOKE_PRIVATE__) |
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28 | #ifndef _INVOKE_H_ |
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29 | #define _INVOKE_H_ |
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30 | |
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31 | #ifdef __cforall |
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32 | extern "Cforall" { |
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33 | static inline struct thread_desc * & get_next( struct thread_desc & this ); |
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34 | static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this ); |
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35 | |
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36 | extern thread_local struct KernelThreadData { |
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37 | struct coroutine_desc * volatile this_coroutine; |
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38 | struct thread_desc * volatile this_thread; |
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39 | struct processor * volatile this_processor; |
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40 | |
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41 | struct { |
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42 | volatile unsigned short disable_count; |
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43 | volatile bool enabled; |
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44 | volatile bool in_progress; |
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45 | } preemption_state; |
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46 | } kernelThreadData; |
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47 | } |
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48 | |
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49 | static inline struct coroutine_desc * volatile active_coroutine() { return TL_GET( this_coroutine ); } |
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50 | static inline struct thread_desc * volatile active_thread() { return TL_GET( this_thread ); } |
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51 | static inline struct processor * volatile active_processor() { return TL_GET( this_processor ); } |
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52 | #endif |
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53 | |
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54 | struct coStack_t { |
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55 | size_t size; // size of stack |
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56 | void * storage; // pointer to stack |
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57 | void * limit; // stack grows towards stack limit |
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58 | void * base; // base of stack |
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59 | void * context; // address of cfa_context_t |
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60 | void * top; // address of top of storage |
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61 | bool userStack; // whether or not the user allocated the stack |
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62 | }; |
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63 | |
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64 | enum coroutine_state { Halted, Start, Inactive, Active, Primed }; |
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65 | |
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66 | struct coroutine_desc { |
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67 | struct coStack_t stack; // stack information of the coroutine |
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68 | const char * name; // textual name for coroutine/task, initialized by uC++ generated code |
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69 | int errno_; // copy of global UNIX variable errno |
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70 | enum coroutine_state state; // current execution status for coroutine |
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71 | struct coroutine_desc * starter; // first coroutine to resume this one |
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72 | struct coroutine_desc * last; // last coroutine to resume this one |
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73 | }; |
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74 | |
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75 | struct __waitfor_mask_t { |
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76 | // the index of the accepted function, -1 if none |
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77 | short * accepted; |
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78 | |
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79 | // list of acceptable functions, null if any |
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80 | __small_array_t(struct __acceptable_t) __cfa_anonymous_object; |
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81 | }; |
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82 | |
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83 | struct monitor_desc { |
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84 | // spinlock to protect internal data |
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85 | struct __spinlock_t lock; |
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86 | |
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87 | // current owner of the monitor |
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88 | struct thread_desc * owner; |
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89 | |
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90 | // queue of threads that are blocked waiting for the monitor |
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91 | __queue_t(struct thread_desc) entry_queue; |
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92 | |
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93 | // stack of conditions to run next once we exit the monitor |
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94 | __stack_t(struct __condition_criterion_t) signal_stack; |
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95 | |
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96 | // monitor routines can be called recursively, we need to keep track of that |
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97 | unsigned int recursion; |
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98 | |
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99 | // mask used to know if some thread is waiting for something while holding the monitor |
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100 | struct __waitfor_mask_t mask; |
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101 | |
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102 | // node used to signal the dtor in a waitfor dtor |
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103 | struct __condition_node_t * dtor_node; |
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104 | }; |
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105 | |
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106 | struct __monitor_group_t { |
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107 | // currently held monitors |
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108 | __small_array_t(monitor_desc*) __cfa_anonymous_object; |
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109 | |
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110 | // last function that acquired monitors |
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111 | fptr_t func; |
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112 | }; |
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113 | |
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114 | struct thread_desc { |
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115 | // Core threading fields |
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116 | // coroutine body used to store context |
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117 | struct coroutine_desc self_cor; |
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118 | |
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119 | // current active context |
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120 | struct coroutine_desc * curr_cor; |
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121 | |
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122 | // monitor body used for mutual exclusion |
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123 | struct monitor_desc self_mon; |
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124 | |
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125 | // pointer to monitor with sufficient lifetime for current monitors |
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126 | struct monitor_desc * self_mon_p; |
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127 | |
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128 | // monitors currently held by this thread |
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129 | struct __monitor_group_t monitors; |
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130 | |
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131 | // Link lists fields |
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132 | // instrusive link field for threads |
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133 | struct thread_desc * next; |
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134 | |
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135 | __cfaabi_dbg_debug_do( |
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136 | // instrusive link field for debugging |
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137 | struct thread_desc * dbg_next; |
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138 | struct thread_desc * dbg_prev; |
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139 | ) |
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140 | }; |
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141 | |
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142 | #ifdef __cforall |
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143 | extern "Cforall" { |
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144 | static inline thread_desc * & get_next( thread_desc & this ) { |
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145 | return this.next; |
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146 | } |
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147 | |
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148 | static inline struct __condition_criterion_t * & get_next( struct __condition_criterion_t & this ); |
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149 | |
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150 | static inline void ?{}(__monitor_group_t & this) { |
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151 | (this.data){NULL}; |
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152 | (this.size){0}; |
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153 | (this.func){NULL}; |
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154 | } |
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155 | |
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156 | static inline void ?{}(__monitor_group_t & this, struct monitor_desc ** data, __lock_size_t size, fptr_t func) { |
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157 | (this.data){data}; |
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158 | (this.size){size}; |
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159 | (this.func){func}; |
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160 | } |
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161 | |
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162 | static inline bool ?==?( const __monitor_group_t & lhs, const __monitor_group_t & rhs ) { |
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163 | if( (lhs.data != 0) != (rhs.data != 0) ) return false; |
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164 | if( lhs.size != rhs.size ) return false; |
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165 | if( lhs.func != rhs.func ) return false; |
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166 | |
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167 | // Check that all the monitors match |
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168 | for( int i = 0; i < lhs.size; i++ ) { |
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169 | // If not a match, check next function |
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170 | if( lhs[i] != rhs[i] ) return false; |
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171 | } |
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172 | |
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173 | return true; |
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174 | } |
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175 | |
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176 | static inline void ?=?(__monitor_group_t & lhs, const __monitor_group_t & rhs) { |
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177 | lhs.data = rhs.data; |
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178 | lhs.size = rhs.size; |
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179 | lhs.func = rhs.func; |
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180 | } |
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181 | } |
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182 | #endif |
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183 | |
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184 | #endif //_INVOKE_H_ |
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185 | #else //! defined(__CFA_INVOKE_PRIVATE__) |
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186 | #ifndef _INVOKE_PRIVATE_H_ |
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187 | #define _INVOKE_PRIVATE_H_ |
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188 | |
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189 | struct machine_context_t { |
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190 | void *SP; |
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191 | void *FP; |
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192 | void *PC; |
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193 | }; |
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194 | |
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195 | // assembler routines that performs the context switch |
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196 | extern void CtxInvokeStub( void ); |
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197 | void CtxSwitch( void * from, void * to ) asm ("CtxSwitch"); |
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198 | |
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199 | #if defined( __i386 ) |
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200 | #define CtxGet( ctx ) __asm__ ( \ |
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201 | "movl %%esp,%0\n" \ |
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202 | "movl %%ebp,%1\n" \ |
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203 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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204 | #elif defined( __x86_64 ) |
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205 | #define CtxGet( ctx ) __asm__ ( \ |
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206 | "movq %%rsp,%0\n" \ |
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207 | "movq %%rbp,%1\n" \ |
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208 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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209 | #elif defined( __ARM_ARCH ) |
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210 | #define CtxGet( ctx ) __asm__ ( \ |
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211 | "mov %0,%%sp\n" \ |
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212 | "mov %1,%%r11\n" \ |
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213 | : "=rm" (ctx.SP), "=rm" (ctx.FP) ) |
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214 | #else |
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215 | #error unknown hardware architecture |
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216 | #endif |
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217 | |
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218 | #endif //_INVOKE_PRIVATE_H_ |
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219 | #endif //! defined(__CFA_INVOKE_PRIVATE__) |
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220 | #ifdef __cforall |
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221 | } |
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222 | #endif |
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223 | |
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224 | // Local Variables: // |
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225 | // mode: c // |
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226 | // tab-width: 4 // |
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227 | // End: // |
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