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1027 | palkovsky | 1 | /* |
2 | * Copyright (C) 2006 Ondrej Palkovsky |
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3 | * All rights reserved. |
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4 | * |
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5 | * Redistribution and use in source and binary forms, with or without |
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6 | * modification, are permitted provided that the following conditions |
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7 | * are met: |
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8 | * |
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9 | * - Redistributions of source code must retain the above copyright |
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10 | * notice, this list of conditions and the following disclaimer. |
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11 | * - Redistributions in binary form must reproduce the above copyright |
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12 | * notice, this list of conditions and the following disclaimer in the |
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13 | * documentation and/or other materials provided with the distribution. |
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14 | * - The name of the author may not be used to endorse or promote products |
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15 | * derived from this software without specific prior written permission. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | */ |
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28 | |||
29 | #include <arch.h> |
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30 | #include <proc/task.h> |
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1288 | jermar | 31 | #include <proc/thread.h> |
1027 | palkovsky | 32 | #include <errno.h> |
33 | #include <memstr.h> |
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34 | #include <debug.h> |
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35 | #include <ipc/ipc.h> |
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36 | #include <ipc/sysipc.h> |
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1281 | palkovsky | 37 | #include <ipc/irq.h> |
1072 | palkovsky | 38 | #include <ipc/ipcrsc.h> |
1258 | palkovsky | 39 | #include <arch/interrupt.h> |
1027 | palkovsky | 40 | #include <print.h> |
1288 | jermar | 41 | #include <syscall/copy.h> |
1297 | jermar | 42 | #include <security/cap.h> |
1329 | palkovsky | 43 | #include <mm/as.h> |
1027 | palkovsky | 44 | |
1084 | palkovsky | 45 | #define GET_CHECK_PHONE(phone,phoneid,err) { \ |
46 | if (phoneid > IPC_MAX_PHONES) { err; } \ |
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47 | phone = &TASK->phones[phoneid]; \ |
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48 | } |
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49 | |||
1090 | palkovsky | 50 | #define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src))) |
1084 | palkovsky | 51 | |
1040 | palkovsky | 52 | /** Return true if the method is a system method */ |
53 | static inline int is_system_method(__native method) |
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54 | { |
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55 | if (method <= IPC_M_LAST_SYSTEM) |
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56 | return 1; |
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57 | return 0; |
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58 | } |
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59 | |||
60 | /** Return true if the message with this method is forwardable |
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61 | * |
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62 | * - some system messages may be forwarded, for some of them |
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63 | * it is useless |
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64 | */ |
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65 | static inline int is_forwardable(__native method) |
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66 | { |
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1359 | jermar | 67 | if (method == IPC_M_PHONE_HUNGUP || method == IPC_M_AS_AREA_SEND) |
1086 | palkovsky | 68 | return 0; /* This message is meant only for the receiver */ |
1040 | palkovsky | 69 | return 1; |
70 | } |
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71 | |||
1027 | palkovsky | 72 | /****************************************************/ |
73 | /* Functions that preprocess answer before sending |
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74 | * it to the recepient |
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75 | */ |
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76 | |||
77 | /** Return true if the caller (ipc_answer) should save |
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1088 | palkovsky | 78 | * the old call contents for answer_preprocess |
1027 | palkovsky | 79 | */ |
1088 | palkovsky | 80 | static inline int answer_need_old(call_t *call) |
1027 | palkovsky | 81 | { |
1086 | palkovsky | 82 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
1027 | palkovsky | 83 | return 1; |
1086 | palkovsky | 84 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO) |
1060 | palkovsky | 85 | return 1; |
1359 | jermar | 86 | if (IPC_GET_METHOD(call->data) == IPC_M_AS_AREA_SEND) |
1329 | palkovsky | 87 | return 1; |
1027 | palkovsky | 88 | return 0; |
89 | } |
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90 | |||
91 | /** Interpret process answer as control information */ |
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1329 | palkovsky | 92 | static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata) |
1027 | palkovsky | 93 | { |
94 | int phoneid; |
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95 | |||
1088 | palkovsky | 96 | if (IPC_GET_RETVAL(answer->data) == EHANGUP) { |
1141 | palkovsky | 97 | /* In case of forward, hangup the forwared phone, |
98 | * not the originator |
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99 | */ |
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100 | spinlock_lock(&answer->data.phone->lock); |
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101 | spinlock_lock(&TASK->answerbox.lock); |
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102 | if (answer->data.phone->callee) { |
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103 | list_remove(&answer->data.phone->list); |
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104 | answer->data.phone->callee = 0; |
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105 | } |
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106 | spinlock_unlock(&TASK->answerbox.lock); |
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107 | spinlock_unlock(&answer->data.phone->lock); |
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1088 | palkovsky | 108 | } |
109 | |||
110 | if (!olddata) |
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1329 | palkovsky | 111 | return 0; |
1088 | palkovsky | 112 | |
1086 | palkovsky | 113 | if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) { |
1040 | palkovsky | 114 | phoneid = IPC_GET_ARG3(*olddata); |
1027 | palkovsky | 115 | if (IPC_GET_RETVAL(answer->data)) { |
116 | /* The connection was not accepted */ |
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117 | phone_dealloc(phoneid); |
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1040 | palkovsky | 118 | } else { |
1090 | palkovsky | 119 | /* The connection was accepted */ |
1040 | palkovsky | 120 | phone_connect(phoneid,&answer->sender->answerbox); |
1090 | palkovsky | 121 | /* Set 'phone identification' as arg3 of response */ |
122 | IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]); |
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1027 | palkovsky | 123 | } |
1086 | palkovsky | 124 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) { |
1060 | palkovsky | 125 | /* If the users accepted call, connect */ |
126 | if (!IPC_GET_RETVAL(answer->data)) { |
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127 | ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata), |
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128 | &TASK->answerbox); |
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129 | } |
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1359 | jermar | 130 | } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_AREA_SEND) { |
131 | if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle as_area receipt */ |
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1329 | palkovsky | 132 | return as_area_steal(answer->sender, |
133 | IPC_GET_ARG2(*olddata),IPC_GET_ARG3(*olddata), |
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134 | IPC_GET_ARG1(answer->data)); |
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135 | } |
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1027 | palkovsky | 136 | } |
1329 | palkovsky | 137 | return 0; |
1027 | palkovsky | 138 | } |
139 | |||
1090 | palkovsky | 140 | /** Called before the request is sent |
141 | * |
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142 | * @return 0 - no error, -1 - report error to user |
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143 | */ |
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144 | static int request_preprocess(call_t *call) |
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145 | { |
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146 | int newphid; |
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1329 | palkovsky | 147 | size_t size; |
1090 | palkovsky | 148 | |
149 | switch (IPC_GET_METHOD(call->data)) { |
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150 | case IPC_M_CONNECT_ME_TO: |
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151 | newphid = phone_alloc(); |
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152 | if (newphid < 0) |
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153 | return ELIMIT; |
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154 | /* Set arg3 for server */ |
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155 | IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]); |
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156 | call->flags |= IPC_CALL_CONN_ME_TO; |
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157 | call->private = newphid; |
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158 | break; |
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1359 | jermar | 159 | case IPC_M_AS_AREA_SEND: |
1329 | palkovsky | 160 | size = as_get_size(IPC_GET_ARG2(call->data)); |
161 | if (!size) { |
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162 | return EPERM; |
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163 | } |
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164 | IPC_SET_ARG3(call->data, size); |
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165 | break; |
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1090 | palkovsky | 166 | default: |
167 | break; |
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168 | } |
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169 | return 0; |
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170 | } |
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171 | |||
1027 | palkovsky | 172 | /****************************************************/ |
173 | /* Functions called to process received call/answer |
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174 | * before passing to uspace |
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175 | */ |
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176 | |||
177 | /** Do basic kernel processing of received call answer */ |
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1090 | palkovsky | 178 | static void process_answer(call_t *call) |
1027 | palkovsky | 179 | { |
1088 | palkovsky | 180 | if (IPC_GET_RETVAL(call->data) == EHANGUP && \ |
181 | call->flags & IPC_CALL_FORWARDED) |
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182 | IPC_SET_RETVAL(call->data, EFORWARD); |
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1090 | palkovsky | 183 | |
184 | if (call->flags & IPC_CALL_CONN_ME_TO) { |
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185 | if (IPC_GET_RETVAL(call->data)) |
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186 | phone_dealloc(call->private); |
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187 | else |
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188 | IPC_SET_ARG3(call->data, call->private); |
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189 | } |
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1027 | palkovsky | 190 | } |
191 | |||
192 | /** Do basic kernel processing of received call request |
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193 | * |
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194 | * @return 0 - the call should be passed to userspace, 1 - ignore call |
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195 | */ |
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196 | static int process_request(answerbox_t *box,call_t *call) |
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197 | { |
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198 | int phoneid; |
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199 | |||
1086 | palkovsky | 200 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) { |
1040 | palkovsky | 201 | phoneid = phone_alloc(); |
1027 | palkovsky | 202 | if (phoneid < 0) { /* Failed to allocate phone */ |
203 | IPC_SET_RETVAL(call->data, ELIMIT); |
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204 | ipc_answer(box,call); |
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205 | return -1; |
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206 | } |
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207 | IPC_SET_ARG3(call->data, phoneid); |
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208 | } |
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209 | return 0; |
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210 | } |
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211 | |||
212 | /** Send a call over IPC, wait for reply, return to user |
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213 | * |
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214 | * @return Call identification, returns -1 on fatal error, |
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215 | -2 on 'Too many async request, handle answers first |
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216 | */ |
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217 | __native sys_ipc_call_sync_fast(__native phoneid, __native method, |
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1086 | palkovsky | 218 | __native arg1, ipc_data_t *data) |
1027 | palkovsky | 219 | { |
220 | call_t call; |
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221 | phone_t *phone; |
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1090 | palkovsky | 222 | int res; |
1027 | palkovsky | 223 | |
1084 | palkovsky | 224 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1027 | palkovsky | 225 | |
1084 | palkovsky | 226 | ipc_call_static_init(&call); |
1027 | palkovsky | 227 | IPC_SET_METHOD(call.data, method); |
228 | IPC_SET_ARG1(call.data, arg1); |
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229 | |||
1090 | palkovsky | 230 | if (!(res=request_preprocess(&call))) { |
231 | ipc_call_sync(phone, &call); |
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232 | process_answer(&call); |
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233 | } else |
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234 | IPC_SET_RETVAL(call.data, res); |
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1086 | palkovsky | 235 | STRUCT_TO_USPACE(&data->args, &call.data.args); |
1027 | palkovsky | 236 | |
237 | return 0; |
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238 | } |
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239 | |||
240 | /** Synchronous IPC call allowing to send whole message */ |
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1086 | palkovsky | 241 | __native sys_ipc_call_sync(__native phoneid, ipc_data_t *question, |
242 | ipc_data_t *reply) |
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1027 | palkovsky | 243 | { |
244 | call_t call; |
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245 | phone_t *phone; |
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1090 | palkovsky | 246 | int res; |
1288 | jermar | 247 | int rc; |
1027 | palkovsky | 248 | |
1084 | palkovsky | 249 | ipc_call_static_init(&call); |
1288 | jermar | 250 | rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args)); |
251 | if (rc != 0) |
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252 | return (__native) rc; |
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1040 | palkovsky | 253 | |
1084 | palkovsky | 254 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
1072 | palkovsky | 255 | |
1090 | palkovsky | 256 | if (!(res=request_preprocess(&call))) { |
257 | ipc_call_sync(phone, &call); |
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258 | process_answer(&call); |
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259 | } else |
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260 | IPC_SET_RETVAL(call.data, res); |
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1027 | palkovsky | 261 | |
1288 | jermar | 262 | rc = STRUCT_TO_USPACE(&reply->args, &call.data.args); |
263 | if (rc != 0) |
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264 | return rc; |
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1027 | palkovsky | 265 | |
266 | return 0; |
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267 | } |
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268 | |||
269 | /** Check that the task did not exceed allowed limit |
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270 | * |
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271 | * @return 0 - Limit OK, -1 - limit exceeded |
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272 | */ |
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273 | static int check_call_limit(void) |
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274 | { |
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275 | if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) { |
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276 | atomic_dec(&TASK->active_calls); |
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277 | return -1; |
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278 | } |
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279 | return 0; |
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280 | } |
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281 | |||
282 | /** Send an asynchronous call over ipc |
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283 | * |
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284 | * @return Call identification, returns -1 on fatal error, |
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285 | -2 on 'Too many async request, handle answers first |
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286 | */ |
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287 | __native sys_ipc_call_async_fast(__native phoneid, __native method, |
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288 | __native arg1, __native arg2) |
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289 | { |
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290 | call_t *call; |
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291 | phone_t *phone; |
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1090 | palkovsky | 292 | int res; |
1027 | palkovsky | 293 | |
294 | if (check_call_limit()) |
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295 | return IPC_CALLRET_TEMPORARY; |
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296 | |||
1090 | palkovsky | 297 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1072 | palkovsky | 298 | |
1258 | palkovsky | 299 | call = ipc_call_alloc(0); |
1027 | palkovsky | 300 | IPC_SET_METHOD(call->data, method); |
301 | IPC_SET_ARG1(call->data, arg1); |
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302 | IPC_SET_ARG2(call->data, arg2); |
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303 | |||
1090 | palkovsky | 304 | if (!(res=request_preprocess(call))) |
305 | ipc_call(phone, call); |
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306 | else |
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307 | ipc_backsend_err(phone, call, res); |
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1027 | palkovsky | 308 | |
309 | return (__native) call; |
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310 | } |
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311 | |||
312 | /** Synchronous IPC call allowing to send whole message |
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313 | * |
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314 | * @return The same as sys_ipc_call_async |
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315 | */ |
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1086 | palkovsky | 316 | __native sys_ipc_call_async(__native phoneid, ipc_data_t *data) |
1027 | palkovsky | 317 | { |
318 | call_t *call; |
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319 | phone_t *phone; |
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1090 | palkovsky | 320 | int res; |
1288 | jermar | 321 | int rc; |
1027 | palkovsky | 322 | |
1072 | palkovsky | 323 | if (check_call_limit()) |
324 | return IPC_CALLRET_TEMPORARY; |
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325 | |||
1090 | palkovsky | 326 | GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL); |
1027 | palkovsky | 327 | |
1258 | palkovsky | 328 | call = ipc_call_alloc(0); |
1288 | jermar | 329 | rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args)); |
1293 | palkovsky | 330 | if (rc != 0) { |
331 | ipc_call_free(call); |
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1288 | jermar | 332 | return (__native) rc; |
1293 | palkovsky | 333 | } |
1090 | palkovsky | 334 | if (!(res=request_preprocess(call))) |
335 | ipc_call(phone, call); |
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336 | else |
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337 | ipc_backsend_err(phone, call, res); |
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1040 | palkovsky | 338 | |
1027 | palkovsky | 339 | return (__native) call; |
340 | } |
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341 | |||
1040 | palkovsky | 342 | /** Forward received call to another destination |
343 | * |
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344 | * The arg1 and arg2 are changed in the forwarded message |
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1060 | palkovsky | 345 | * |
346 | * Warning: If implementing non-fast version, make sure that |
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347 | * arg3 is not rewritten for certain system IPC |
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1040 | palkovsky | 348 | */ |
349 | __native sys_ipc_forward_fast(__native callid, __native phoneid, |
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350 | __native method, __native arg1) |
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351 | { |
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352 | call_t *call; |
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353 | phone_t *phone; |
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354 | |||
355 | call = get_call(callid); |
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356 | if (!call) |
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357 | return ENOENT; |
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358 | |||
1088 | palkovsky | 359 | call->flags |= IPC_CALL_FORWARDED; |
360 | |||
1084 | palkovsky | 361 | GET_CHECK_PHONE(phone, phoneid, { |
1040 | palkovsky | 362 | IPC_SET_RETVAL(call->data, EFORWARD); |
363 | ipc_answer(&TASK->answerbox, call); |
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364 | return ENOENT; |
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1084 | palkovsky | 365 | }); |
1040 | palkovsky | 366 | |
367 | if (!is_forwardable(IPC_GET_METHOD(call->data))) { |
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368 | IPC_SET_RETVAL(call->data, EFORWARD); |
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369 | ipc_answer(&TASK->answerbox, call); |
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370 | return EPERM; |
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371 | } |
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372 | |||
373 | /* Userspace is not allowed to change method of system methods |
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374 | * on forward, allow changing ARG1 and ARG2 by means of method and arg1 |
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375 | */ |
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376 | if (is_system_method(IPC_GET_METHOD(call->data))) { |
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1090 | palkovsky | 377 | if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) |
378 | phone_dealloc(IPC_GET_ARG3(call->data)); |
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379 | |||
1040 | palkovsky | 380 | IPC_SET_ARG1(call->data, method); |
381 | IPC_SET_ARG2(call->data, arg1); |
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382 | } else { |
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383 | IPC_SET_METHOD(call->data, method); |
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384 | IPC_SET_ARG1(call->data, arg1); |
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385 | } |
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386 | |||
1088 | palkovsky | 387 | return ipc_forward(call, phone, &TASK->answerbox); |
1040 | palkovsky | 388 | } |
389 | |||
1027 | palkovsky | 390 | /** Send IPC answer */ |
391 | __native sys_ipc_answer_fast(__native callid, __native retval, |
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392 | __native arg1, __native arg2) |
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393 | { |
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394 | call_t *call; |
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1040 | palkovsky | 395 | ipc_data_t saved_data; |
1088 | palkovsky | 396 | int saveddata = 0; |
1329 | palkovsky | 397 | int rc; |
1027 | palkovsky | 398 | |
1346 | palkovsky | 399 | /* Do not answer notification callids */ |
400 | if (callid & IPC_CALLID_NOTIFICATION) |
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401 | return 0; |
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402 | |||
1040 | palkovsky | 403 | call = get_call(callid); |
404 | if (!call) |
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405 | return ENOENT; |
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1027 | palkovsky | 406 | |
1088 | palkovsky | 407 | if (answer_need_old(call)) { |
1040 | palkovsky | 408 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 409 | saveddata = 1; |
1027 | palkovsky | 410 | } |
411 | |||
412 | IPC_SET_RETVAL(call->data, retval); |
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413 | IPC_SET_ARG1(call->data, arg1); |
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414 | IPC_SET_ARG2(call->data, arg2); |
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1329 | palkovsky | 415 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1040 | palkovsky | 416 | |
1027 | palkovsky | 417 | ipc_answer(&TASK->answerbox, call); |
1329 | palkovsky | 418 | return rc; |
1027 | palkovsky | 419 | } |
420 | |||
421 | /** Send IPC answer */ |
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1086 | palkovsky | 422 | __native sys_ipc_answer(__native callid, ipc_data_t *data) |
1027 | palkovsky | 423 | { |
424 | call_t *call; |
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1040 | palkovsky | 425 | ipc_data_t saved_data; |
1088 | palkovsky | 426 | int saveddata = 0; |
1288 | jermar | 427 | int rc; |
1027 | palkovsky | 428 | |
1346 | palkovsky | 429 | /* Do not answer notification callids */ |
430 | if (callid & IPC_CALLID_NOTIFICATION) |
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431 | return 0; |
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432 | |||
1040 | palkovsky | 433 | call = get_call(callid); |
434 | if (!call) |
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435 | return ENOENT; |
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1027 | palkovsky | 436 | |
1088 | palkovsky | 437 | if (answer_need_old(call)) { |
1040 | palkovsky | 438 | memcpy(&saved_data, &call->data, sizeof(call->data)); |
1088 | palkovsky | 439 | saveddata = 1; |
1027 | palkovsky | 440 | } |
1288 | jermar | 441 | rc = copy_from_uspace(&call->data.args, &data->args, |
1086 | palkovsky | 442 | sizeof(call->data.args)); |
1288 | jermar | 443 | if (rc != 0) |
444 | return rc; |
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1027 | palkovsky | 445 | |
1329 | palkovsky | 446 | rc = answer_preprocess(call, saveddata ? &saved_data : NULL); |
1027 | palkovsky | 447 | |
448 | ipc_answer(&TASK->answerbox, call); |
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449 | |||
1329 | palkovsky | 450 | return rc; |
1027 | palkovsky | 451 | } |
452 | |||
1086 | palkovsky | 453 | /** Hang up the phone |
454 | * |
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455 | */ |
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456 | __native sys_ipc_hangup(int phoneid) |
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457 | { |
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458 | phone_t *phone; |
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459 | |||
460 | GET_CHECK_PHONE(phone, phoneid, return ENOENT); |
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461 | |||
462 | if (ipc_phone_hangup(phone)) |
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463 | return -1; |
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464 | |||
465 | return 0; |
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466 | } |
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467 | |||
1027 | palkovsky | 468 | /** Wait for incoming ipc call or answer |
469 | * |
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1086 | palkovsky | 470 | * @param calldata Pointer to buffer where the call/answer data is stored |
1364 | jermar | 471 | * @param usec Timeout. See waitq_sleep_timeout() for explanation. |
472 | * @param nonblocking See waitq_sleep_timeout() for explanation. |
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473 | * |
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1027 | palkovsky | 474 | * @return Callid, if callid & 1, then the call is answer |
475 | */ |
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1364 | jermar | 476 | __native sys_ipc_wait_for_call(ipc_data_t *calldata, __u32 usec, int nonblocking) |
1027 | palkovsky | 477 | { |
478 | call_t *call; |
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479 | |||
480 | restart: |
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1364 | jermar | 481 | call = ipc_wait_for_call(&TASK->answerbox, usec, nonblocking); |
1088 | palkovsky | 482 | if (!call) |
483 | return 0; |
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1027 | palkovsky | 484 | |
1258 | palkovsky | 485 | if (call->flags & IPC_CALL_NOTIF) { |
486 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
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487 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
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488 | ipc_call_free(call); |
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489 | |||
490 | return ((__native)call) | IPC_CALLID_NOTIFICATION; |
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491 | } |
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492 | |||
1027 | palkovsky | 493 | if (call->flags & IPC_CALL_ANSWERED) { |
1090 | palkovsky | 494 | process_answer(call); |
1027 | palkovsky | 495 | |
1086 | palkovsky | 496 | ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC)); |
497 | |||
1027 | palkovsky | 498 | atomic_dec(&TASK->active_calls); |
1086 | palkovsky | 499 | |
500 | if (call->flags & IPC_CALL_DISCARD_ANSWER) { |
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501 | ipc_call_free(call); |
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502 | goto restart; |
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503 | } |
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504 | |||
505 | STRUCT_TO_USPACE(&calldata->args, &call->data.args); |
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1027 | palkovsky | 506 | ipc_call_free(call); |
507 | |||
508 | return ((__native)call) | IPC_CALLID_ANSWERED; |
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509 | } |
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1086 | palkovsky | 510 | |
1027 | palkovsky | 511 | if (process_request(&TASK->answerbox, call)) |
512 | goto restart; |
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1086 | palkovsky | 513 | |
1090 | palkovsky | 514 | /* Include phone address('id') of the caller in the request, |
515 | * copy whole call->data, not only call->data.args */ |
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1396 | palkovsky | 516 | if (STRUCT_TO_USPACE(calldata, &call->data)) { |
517 | return 0; |
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518 | } |
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1027 | palkovsky | 519 | return (__native)call; |
520 | } |
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1258 | palkovsky | 521 | |
522 | /** Connect irq handler to task */ |
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1281 | palkovsky | 523 | __native sys_ipc_register_irq(__native irq, irq_code_t *ucode) |
1258 | palkovsky | 524 | { |
1297 | jermar | 525 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
526 | return EPERM; |
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527 | |||
1258 | palkovsky | 528 | if (irq >= IRQ_COUNT) |
1297 | jermar | 529 | return (__native) ELIMIT; |
1258 | palkovsky | 530 | |
531 | irq_ipc_bind_arch(irq); |
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1281 | palkovsky | 532 | |
533 | return ipc_irq_register(&TASK->answerbox, irq, ucode); |
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1258 | palkovsky | 534 | } |
535 | |||
536 | /* Disconnect irq handler from task */ |
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537 | __native sys_ipc_unregister_irq(__native irq) |
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538 | { |
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1297 | jermar | 539 | if (!(cap_get(TASK) & CAP_IRQ_REG)) |
540 | return EPERM; |
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541 | |||
1258 | palkovsky | 542 | if (irq >= IRQ_COUNT) |
1297 | jermar | 543 | return (__native) ELIMIT; |
1258 | palkovsky | 544 | |
545 | ipc_irq_unregister(&TASK->answerbox, irq); |
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546 | |||
547 | return 0; |
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548 | } |