WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/ipc/sysipc.c


/*
 * Copyright (C) 2006 Ondrej Palkovsky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
#include <arch.h>
#include <proc/task.h>
#include <proc/thread.h>
#include <errno.h>
#include <memstr.h>
#include <debug.h>
#include <ipc/ipc.h>
#include <ipc/sysipc.h>
#include <ipc/irq.h>
#include <ipc/ipcrsc.h>
#include <arch/interrupt.h>
#include <print.h>
#include <syscall/copy.h>
#include <security/cap.h>
#include <mm/as.h>
 
#define GET_CHECK_PHONE(phone,phoneid,err) { \
      if (phoneid > IPC_MAX_PHONES) { err; } \
      phone = &TASK->phones[phoneid]; \
}
 
#define STRUCT_TO_USPACE(dst,src) copy_to_uspace(dst,src,sizeof(*(src)))
 
/** Return true if the method is a system method */
static inline int is_system_method(__native method)
{
    if (method <= IPC_M_LAST_SYSTEM)
        return 1;
    return 0;
}
 
/** Return true if the message with this method is forwardable
 *
 * - some system messages may be forwarded, for some of them
 *   it is useless
 */
static inline int is_forwardable(__native method)
{
    if (method == IPC_M_PHONE_HUNGUP)
        return 0; /* This message is meant only for the receiver */
    return 1;
}
 
/****************************************************/
/* Functions that preprocess answer before sending
 * it to the recepient
 */
 
/** Return true if the caller (ipc_answer) should save
 * the old call contents for answer_preprocess
 */
static inline int answer_need_old(call_t *call)
{
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_ME_TO)
        return 1;
    if (IPC_GET_METHOD(call->data) == IPC_M_AS_SEND)
        return 1;
    return 0;
}
 
/** Interpret process answer as control information */
static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata)
{
    int phoneid;
 
    if (IPC_GET_RETVAL(answer->data) == EHANGUP) {
        /* In case of forward, hangup the forwared phone,
         * not the originator
         */
        spinlock_lock(&answer->data.phone->lock);
        spinlock_lock(&TASK->answerbox.lock);
        if (answer->data.phone->callee) {
            list_remove(&answer->data.phone->list);
            answer->data.phone->callee = 0;
        }
        spinlock_unlock(&TASK->answerbox.lock);
        spinlock_unlock(&answer->data.phone->lock);
    }
 
    if (!olddata)
        return 0;
 
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
        phoneid = IPC_GET_ARG3(*olddata);
        if (IPC_GET_RETVAL(answer->data)) {
            /* The connection was not accepted */
            phone_dealloc(phoneid);
        } else {
            /* The connection was accepted */
            phone_connect(phoneid,&answer->sender->answerbox);
            /* Set 'phone identification' as arg3 of response */
            IPC_SET_ARG3(answer->data, (__native)&TASK->phones[phoneid]);
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
        /* If the users accepted call, connect */
        if (!IPC_GET_RETVAL(answer->data)) {
            ipc_phone_connect((phone_t *)IPC_GET_ARG3(*olddata),
                      &TASK->answerbox);
        }
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_AS_SEND) {
        if (!IPC_GET_RETVAL(answer->data)) { /* Accepted, handle As_area receival */
            return as_area_steal(answer->sender,
                         IPC_GET_ARG2(*olddata),IPC_GET_ARG3(*olddata),
                         IPC_GET_ARG1(answer->data));
        }
    }
    return 0;
}
 
/** Called before the request is sent
 *
 * @return 0 - no error, -1 - report error to user
 */
static int request_preprocess(call_t *call)
{
    int newphid;
    size_t size;
 
    switch (IPC_GET_METHOD(call->data)) {
    case IPC_M_CONNECT_ME_TO:
        newphid = phone_alloc();
        if (newphid < 0)
            return ELIMIT;
        /* Set arg3 for server */
        IPC_SET_ARG3(call->data, (__native)&TASK->phones[newphid]);
        call->flags |= IPC_CALL_CONN_ME_TO;
        call->private = newphid;
        break;
    case IPC_M_AS_SEND:
        size = as_get_size(IPC_GET_ARG2(call->data));
        if (!size) {
            return EPERM;
        }
        IPC_SET_ARG3(call->data, size);
        break;
    default:
        break;
    }
    return 0;
}
 
/****************************************************/
/* Functions called to process received call/answer
 * before passing to uspace
 */
 
/** Do basic kernel processing of received call answer */
static void process_answer(call_t *call)
{
    if (IPC_GET_RETVAL(call->data) == EHANGUP && \
        call->flags & IPC_CALL_FORWARDED)
        IPC_SET_RETVAL(call->data, EFORWARD);
 
    if (call->flags & IPC_CALL_CONN_ME_TO) {
        if (IPC_GET_RETVAL(call->data))
            phone_dealloc(call->private);
        else
            IPC_SET_ARG3(call->data, call->private);
    }
}
 
/** Do basic kernel processing of received call request
 *
 * @return 0 - the call should be passed to userspace, 1 - ignore call
 */
static int process_request(answerbox_t *box,call_t *call)
{
    int phoneid;
 
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
        phoneid = phone_alloc();
        if (phoneid < 0) { /* Failed to allocate phone */
            IPC_SET_RETVAL(call->data, ELIMIT);
            ipc_answer(box,call);
            return -1;
        }
        IPC_SET_ARG3(call->data, phoneid);
    }
    return 0;
}
 
/** Send a call over IPC, wait for reply, return to user
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_sync_fast(__native phoneid, __native method,
                __native arg1, ipc_data_t *data)
{
    call_t call;
    phone_t *phone;
    int res;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    ipc_call_static_init(&call);
    IPC_SET_METHOD(call.data, method);
    IPC_SET_ARG1(call.data, arg1);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
    STRUCT_TO_USPACE(&data->args, &call.data.args);
 
    return 0;
}
 
/** Synchronous IPC call allowing to send whole message */
__native sys_ipc_call_sync(__native phoneid, ipc_data_t *question,
               ipc_data_t *reply)
{
    call_t call;
    phone_t *phone;
    int res;
    int rc;
 
    ipc_call_static_init(&call);
    rc = copy_from_uspace(&call.data.args, &question->args, sizeof(call.data.args));
    if (rc != 0)
        return (__native) rc;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (!(res=request_preprocess(&call))) {
        ipc_call_sync(phone, &call);
        process_answer(&call);
    } else
        IPC_SET_RETVAL(call.data, res);
 
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
    if (rc != 0)
        return rc;
 
    return 0;
}
 
/** Check that the task did not exceed allowed limit
 *
 * @return 0 - Limit OK,   -1 - limit exceeded
 */
static int check_call_limit(void)
{
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
        atomic_dec(&TASK->active_calls);
        return -1;
    }
    return 0;
}
 
/** Send an asynchronous call over ipc
 *
 * @return Call identification, returns -1 on fatal error,
           -2 on 'Too many async request, handle answers first
 */
__native sys_ipc_call_async_fast(__native phoneid, __native method,
                 __native arg1, __native arg2)
{
    call_t *call;
    phone_t *phone;
    int res;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    IPC_SET_METHOD(call->data, method);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
 
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Synchronous IPC call allowing to send whole message
 *
 * @return The same as sys_ipc_call_async
 */
__native sys_ipc_call_async(__native phoneid, ipc_data_t *data)
{
    call_t *call;
    phone_t *phone;
    int res;
    int rc;
 
    if (check_call_limit())
        return IPC_CALLRET_TEMPORARY;
 
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
 
    call = ipc_call_alloc(0);
    rc = copy_from_uspace(&call->data.args, &data->args, sizeof(call->data.args));
    if (rc != 0) {
        ipc_call_free(call);
        return (__native) rc;
    }
    if (!(res=request_preprocess(call)))
        ipc_call(phone, call);
    else
        ipc_backsend_err(phone, call, res);
 
    return (__native) call;
}
 
/** Forward received call to another destination
 *
 * The arg1 and arg2 are changed in the forwarded message
 *
 * Warning: If implementing non-fast version, make sure that
 *          arg3 is not rewritten for certain system IPC
 */
__native sys_ipc_forward_fast(__native callid, __native phoneid,
                  __native method, __native arg1)
{
    call_t *call;
    phone_t *phone;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    call->flags |= IPC_CALL_FORWARDED;
 
    GET_CHECK_PHONE(phone, phoneid, {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return ENOENT;
    });    
 
    if (!is_forwardable(IPC_GET_METHOD(call->data))) {
        IPC_SET_RETVAL(call->data, EFORWARD);
        ipc_answer(&TASK->answerbox, call);
        return EPERM;
    }
 
    /* Userspace is not allowed to change method of system methods
     * on forward, allow changing ARG1 and ARG2 by means of method and arg1
     */
    if (is_system_method(IPC_GET_METHOD(call->data))) {
        if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
            phone_dealloc(IPC_GET_ARG3(call->data));
 
        IPC_SET_ARG1(call->data, method);
        IPC_SET_ARG2(call->data, arg1);
    } else {
        IPC_SET_METHOD(call->data, method);
        IPC_SET_ARG1(call->data, arg1);
    }
 
    return ipc_forward(call, phone, &TASK->answerbox);
}
 
/** Send IPC answer */
__native sys_ipc_answer_fast(__native callid, __native retval,
                 __native arg1, __native arg2)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
    int rc;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
 
    IPC_SET_RETVAL(call->data, retval);
    IPC_SET_ARG1(call->data, arg1);
    IPC_SET_ARG2(call->data, arg2);
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
 
    ipc_answer(&TASK->answerbox, call);
    return rc;
}
 
/** Send IPC answer */
__native sys_ipc_answer(__native callid, ipc_data_t *data)
{
    call_t *call;
    ipc_data_t saved_data;
    int saveddata = 0;
    int rc;
 
    call = get_call(callid);
    if (!call)
        return ENOENT;
 
    if (answer_need_old(call)) {
        memcpy(&saved_data, &call->data, sizeof(call->data));
        saveddata = 1;
    }
    rc = copy_from_uspace(&call->data.args, &data->args,
             sizeof(call->data.args));
    if (rc != 0)
        return rc;
 
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
   
    ipc_answer(&TASK->answerbox, call);
 
    return rc;
}
 
/** Hang up the phone
 *
 */
__native sys_ipc_hangup(int phoneid)
{
    phone_t *phone;
 
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
 
    if (ipc_phone_hangup(phone))
        return -1;
 
    return 0;
}
 
/** Wait for incoming ipc call or answer
 *
 * @param calldata Pointer to buffer where the call/answer data is stored
 * @param flags
 * @return Callid, if callid & 1, then the call is answer
 */
__native sys_ipc_wait_for_call(ipc_data_t *calldata, __native flags)
{
    call_t *call;
 
restart:   
    call = ipc_wait_for_call(&TASK->answerbox, flags);
    if (!call)
        return 0;
 
    if (call->flags & IPC_CALL_NOTIF) {
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
       
        return ((__native)call) | IPC_CALLID_NOTIFICATION;
    }
 
    if (call->flags & IPC_CALL_ANSWERED) {
        process_answer(call);
 
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
 
        atomic_dec(&TASK->active_calls);
 
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
            ipc_call_free(call);
            goto restart;
        }
 
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
        ipc_call_free(call);
 
        return ((__native)call) | IPC_CALLID_ANSWERED;
    }
 
    if (process_request(&TASK->answerbox, call))
        goto restart;
 
    /* Include phone address('id') of the caller in the request,
     * copy whole call->data, not only call->data.args */
    STRUCT_TO_USPACE(calldata, &call->data);
    return (__native)call;
}
 
/** Connect irq handler to task */
__native sys_ipc_register_irq(__native irq, irq_code_t *ucode)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    irq_ipc_bind_arch(irq);
 
    return ipc_irq_register(&TASK->answerbox, irq, ucode);
}
 
/* Disconnect irq handler from task */
__native sys_ipc_unregister_irq(__native irq)
{
    if (!(cap_get(TASK) & CAP_IRQ_REG))
        return EPERM;
 
    if (irq >= IRQ_COUNT)
        return (__native) ELIMIT;
 
    ipc_irq_unregister(&TASK->answerbox, irq);
 
    return 0;
}
 

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

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/ipc/sysipc.c – Rev 1297 → 1329