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source: trunk/kernel/kern/process.c @ 434

Last change on this file since 434 was 433, checked in by alain, 7 years ago
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File size: 65.4 KB

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1	/*
2	* process.c - process related management
3	*
4	* Authors Ghassan Almaless (2008,2009,2010,2011,2012)
5	* Mohamed Lamine Karaoui (2015)
6	* Alain Greiner (2016,2017,2018)
7	*
8	* Copyright (c) UPMC Sorbonne Universites
9	*
10	* This file is part of ALMOS-MKH.
11	*
12	* ALMOS-MKH is free software; you can redistribute it and/or modify it
13	* under the terms of the GNU General Public License as published by
14	* the Free Software Foundation; version 2.0 of the License.
15	*
16	* ALMOS-MKH is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
23	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24	*/
25
26	#include <kernel_config.h>
27	#include <hal_types.h>
28	#include <hal_remote.h>
29	#include <hal_uspace.h>
30	#include <hal_irqmask.h>
31	#include <errno.h>
32	#include <printk.h>
33	#include <memcpy.h>
34	#include <bits.h>
35	#include <kmem.h>
36	#include <page.h>
37	#include <vmm.h>
38	#include <vfs.h>
39	#include <core.h>
40	#include <thread.h>
41	#include <chdev.h>
42	#include <list.h>
43	#include <string.h>
44	#include <scheduler.h>
45	#include <remote_spinlock.h>
46	#include <dqdt.h>
47	#include <cluster.h>
48	#include <ppm.h>
49	#include <boot_info.h>
50	#include <process.h>
51	#include <elf.h>
52	#include <syscalls.h>
53	#include <signal.h>
54
55	//////////////////////////////////////////////////////////////////////////////////////////
56	// Extern global variables
57	//////////////////////////////////////////////////////////////////////////////////////////
58
59	extern process_t process_zero; // allocated in kernel_init.c
60	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
61
62	//////////////////////////////////////////////////////////////////////////////////////////
63	// Process initialisation related functions
64	//////////////////////////////////////////////////////////////////////////////////////////
65
66	///////////////////////////
67	process_t * process_alloc()
68	{
69	kmem_req_t req;
70
71	req.type = KMEM_PROCESS;
72	req.size = sizeof(process_t);
73	req.flags = AF_KERNEL;
74
75	return (process_t *)kmem_alloc( &req );
76	}
77
78	////////////////////////////////////////
79	void process_free( process_t * process )
80	{
81	kmem_req_t req;
82
83	req.type = KMEM_PROCESS;
84	req.ptr = process;
85	kmem_free( &req );
86	}
87
88	/////////////////////////////////////////////////
89	void process_reference_init( process_t * process,
90	pid_t pid,
91	xptr_t parent_xp,
92	xptr_t model_xp )
93	{
94	cxy_t parent_cxy;
95	process_t * parent_ptr;
96	cxy_t model_cxy;
97	process_t * model_ptr;
98	xptr_t stdin_xp;
99	xptr_t stdout_xp;
100	xptr_t stderr_xp;
101	uint32_t stdin_id;
102	uint32_t stdout_id;
103	uint32_t stderr_id;
104	error_t error;
105	uint32_t txt_id;
106	char rx_path[40];
107	char tx_path[40];
108	xptr_t chdev_xp;
109	chdev_t * chdev_ptr;
110	cxy_t chdev_cxy;
111	pid_t model_pid;
112	pid_t parent_pid;
113
114	// get model process cluster and local pointer
115	model_cxy = GET_CXY( model_xp );
116	model_ptr = (process_t *)GET_PTR( model_xp );
117
118	// get parent process cluster and local pointer
119	parent_cxy = GET_CXY( parent_xp );
120	parent_ptr = (process_t *)GET_PTR( parent_xp );
121
122	// get model_pid and parent_pid
123	parent_pid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) );
124	model_pid = hal_remote_lw( XPTR( model_cxy , &model_ptr->pid ) );
125
126	#if CONFIG_DEBUG_PROCESS_REFERENCE_INIT
127	uint32_t cycle = (uint32_t)hal_get_cycles();
128	if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT )
129	printk("\n[DBG] %s : thread %x enter / pid = %x / ppid = %x / model_pid = %x / cycle %d\n",
130	__FUNCTION__ , CURRENT_THREAD , pid , parent_pid , model_pid , cycle );
131	#endif
132
133	// initialize PID, REF_XP, PARENT_XP, and STATE
134	process->pid = pid;
135	process->ref_xp = XPTR( local_cxy , process );
136	process->parent_xp = parent_xp;
137	process->term_state = 0;
138
139	// initialize vmm as empty
140	error = vmm_init( process );
141	assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n" );
142
143	#if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1)
144	cycle = (uint32_t)hal_get_cycles();
145	if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT )
146	printk("\n[DBG] %s : thread %x / vmm empty for process %x / cycle %d\n",
147	__FUNCTION__ , CURRENT_THREAD , pid , cycle );
148	#endif
149
150	// initialize fd_array as empty
151	process_fd_init( process );
152
153	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
154	// - if INIT (pid == 1) => link to kernel TXT[0]
155	// - if KSH[i] (model_pid == 1) => allocate a free TXT[i]
156	// - if USER process => same terminal as model
157
158	if( (pid == 1) \|\| (model_pid == 1)) // INIT or KSH process
159	{
160	if (pid == 1 ) txt_id = 0; // INIT
161	else txt_id = process_txt_alloc(); // KSH[i]
162
163	// attach process to TXT[txt_id]
164	process_txt_attach( process , txt_id );
165
166	// build path to TXT_RX[i] and TXT_TX[i] chdevs
167	snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
168	snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
169
170	// create stdin pseudo file
171	error = vfs_open( process,
172	rx_path,
173	O_RDONLY,
174	0, // FIXME chmod
175	&stdin_xp,
176	&stdin_id );
177
178	assert( (error == 0) , __FUNCTION__ , "cannot open stdin pseudo file" );
179	assert( (stdin_id == 0) , __FUNCTION__ , "stdin index must be 0" );
180
181	// create stdout pseudo file
182	error = vfs_open( process,
183	tx_path,
184	O_WRONLY,
185	0, // FIXME chmod
186	&stdout_xp,
187	&stdout_id );
188
189	assert( (error == 0) , __FUNCTION__ , "cannot open stdout pseudo file" );
190	assert( (stdout_id == 1) , __FUNCTION__ , "stdout index must be 1" );
191
192	// create stderr pseudo file
193	error = vfs_open( process,
194	tx_path,
195	O_WRONLY,
196	0, // FIXME chmod
197	&stderr_xp,
198	&stderr_id );
199
200	assert( (error == 0) , __FUNCTION__ , "cannot open stderr pseudo file" );
201	assert( (stderr_id == 2) , __FUNCTION__ , "stderr index must be 2" );
202
203	}
204	else // normal user process
205	{
206	// get extended pointer on model process TXT chdev
207	chdev_xp = chdev_from_file( model_ptr->fd_array.array[0] );
208
209	// get cluster and local pointer on chdev
210	chdev_cxy = GET_CXY( chdev_xp );
211	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
212
213	// get TXT terminal index
214	txt_id = hal_remote_lw( XPTR( chdev_cxy , &chdev_ptr->channel ) );
215
216	// attach process to TXT[txt_id]
217	process_txt_attach( process , txt_id );
218
219	// copy all open files from model process fd_array to this process
220	process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ),
221	XPTR( model_cxy , &model_ptr->fd_array ) );
222	}
223
224	// initialize specific inodes root and cwd
225	process->vfs_root_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy,
226	&model_ptr->vfs_root_xp ) );
227	process->vfs_cwd_xp = (xptr_t)hal_remote_lwd( XPTR( model_cxy,
228	&model_ptr->vfs_cwd_xp ) );
229	vfs_inode_remote_up( process->vfs_root_xp );
230	vfs_inode_remote_up( process->vfs_cwd_xp );
231
232	remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ) );
233
234	#if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1)
235	cycle = (uint32_t)hal_get_cycles();
236	if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT )
237	printk("\n[DBG] %s : thread %x / fd_array for process %x / cycle %d\n",
238	__FUNCTION__ , CURRENT_THREAD , pid , cycle );
239	#endif
240
241	// reset children list root
242	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
243	process->children_nr = 0;
244	remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) );
245
246	// reset semaphore / mutex / barrier / condvar list roots
247	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
248	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
249	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
250	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
251	remote_spinlock_init( XPTR( local_cxy , &process->sync_lock ) );
252
253	// register new process in the local cluster manager pref_tbl[]
254	lpid_t lpid = LPID_FROM_PID( pid );
255	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
256
257	// register new process descriptor in local cluster manager local_list
258	cluster_process_local_link( process );
259
260	// register new process descriptor in local cluster manager copies_list
261	cluster_process_copies_link( process );
262
263	// reset th_tbl[] array as empty in process descriptor
264	uint32_t i;
265	for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ )
266	{
267	process->th_tbl[i] = NULL;
268	}
269	process->th_nr = 0;
270	spinlock_init( &process->th_lock );
271
272	hal_fence();
273
274	#if (CONFIG_DEBUG_PROCESS_REFERENCE_INIT & 1)
275	cycle = (uint32_t)hal_get_cycles();
276	if( CONFIG_DEBUG_PROCESS_REFERENCE_INIT )
277	printk("\n[DBG] %s : thread %x exit / process %x / cycle %d\n",
278	__FUNCTION__ , CURRENT_THREAD , pid , cycle );
279	#endif
280
281	} // process_reference_init()
282
283	/////////////////////////////////////////////////////
284	error_t process_copy_init( process_t * local_process,
285	xptr_t reference_process_xp )
286	{
287	error_t error;
288
289	// get reference process cluster and local pointer
290	cxy_t ref_cxy = GET_CXY( reference_process_xp );
291	process_t * ref_ptr = (process_t *)GET_PTR( reference_process_xp );
292
293	// initialize PID, REF_XP, PARENT_XP, and STATE
294	local_process->pid = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->pid ) );
295	local_process->parent_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
296	local_process->ref_xp = reference_process_xp;
297	local_process->term_state = 0;
298
299	#if CONFIG_DEBUG_PROCESS_COPY_INIT
300	uint32_t cycle = (uint32_t)hal_get_cycles();
301	if( CONFIG_DEBUG_PROCESS_COPY_INIT )
302	printk("\n[DBG] %s : thread %x enter for process %x\n",
303	__FUNCTION__ , CURRENT_THREAD , local_process->pid );
304	#endif
305
306	// reset local process vmm
307	error = vmm_init( local_process );
308	assert( (error == 0) , __FUNCTION__ , "cannot initialize VMM\n");
309
310	// reset process file descriptors array
311	process_fd_init( local_process );
312
313	// reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields
314	local_process->vfs_root_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
315	local_process->vfs_bin_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
316	local_process->vfs_cwd_xp = XPTR_NULL;
317
318	// reset children list root (not used in a process descriptor copy)
319	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
320	local_process->children_nr = 0;
321	remote_spinlock_init( XPTR( local_cxy , &local_process->children_lock ) );
322
323	// reset children_list (not used in a process descriptor copy)
324	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
325
326	// reset semaphores list root (not used in a process descriptor copy)
327	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
328	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
329	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
330	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
331
332	// reset th_tbl[] array as empty
333	uint32_t i;
334	for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ )
335	{
336	local_process->th_tbl[i] = NULL;
337	}
338	local_process->th_nr = 0;
339	spinlock_init( &local_process->th_lock );
340
341	// register new process descriptor in local cluster manager local_list
342	cluster_process_local_link( local_process );
343
344	// register new process descriptor in owner cluster manager copies_list
345	cluster_process_copies_link( local_process );
346
347	hal_fence();
348
349	#if CONFIG_DEBUG_PROCESS_COPY_INIT
350	cycle = (uint32_t)hal_get_cycles();
351	if( CONFIG_DEBUG_PROCESS_COPY_INIT )
352	printk("\n[DBG] %s : thread %x exit for process %x\n",
353	__FUNCTION__ , CURRENT_THREAD , local_process->pid );
354	#endif
355
356	return 0;
357
358	} // end process_copy_init()
359
360	///////////////////////////////////////////
361	void process_destroy( process_t * process )
362	{
363	xptr_t parent_xp;
364	process_t * parent_ptr;
365	cxy_t parent_cxy;
366	xptr_t parent_thread_xp;
367	xptr_t children_lock_xp;
368	xptr_t copies_lock_xp;
369
370	assert( (process->th_nr == 0) , __FUNCTION__ ,
371	"process %x in cluster %x has still active threads", process->pid , local_cxy );
372
373	#if CONFIG_DEBUG_PROCESS_DESTROY
374	uint32_t cycle = (uint32_t)hal_get_cycles();
375	if( CONFIG_DEBUG_PROCESS_DESTROY )
376	printk("\n[DBG] %s : thread %x enter to destroy process %x (pid = %x) / cycle %d\n",
377	__FUNCTION__ , CURRENT_THREAD , process, process->pid , cycle );
378	#endif
379
380	// get local process manager pointer
381	pmgr_t * pmgr = &LOCAL_CLUSTER->pmgr;
382
383	// remove process from local_list in cluster manager
384	remote_spinlock_lock( XPTR( local_cxy , &pmgr->local_lock ) );
385	xlist_unlink( XPTR( local_cxy , &process->local_list ) );
386	remote_spinlock_unlock( XPTR( local_cxy , &pmgr->local_lock ) );
387
388	// get extended pointer on copies_lock in owner cluster manager
389	cxy_t owner_cxy = CXY_FROM_PID( process->pid );
390	lpid_t lpid = LPID_FROM_PID( process->pid );
391	copies_lock_xp = XPTR( owner_cxy , &pmgr->copies_lock[lpid] );
392
393	// remove local process from copies_list
394	remote_spinlock_lock( copies_lock_xp );
395	xlist_unlink( XPTR( local_cxy , &process->copies_list ) );
396	remote_spinlock_unlock( copies_lock_xp );
397
398	// for reference process only
399	if( XPTR( local_cxy , process ) == process->ref_xp )
400	{
401	// remove reference process from txt_list
402	process_txt_detach( process );
403
404	// get pointers on parent process
405	parent_xp = process->parent_xp;
406	parent_cxy = GET_CXY( parent_xp );
407	parent_ptr = GET_PTR( parent_xp );
408
409	// get extended pointer on children_lock in parent process
410	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
411
412	// remove process from children_list
413	remote_spinlock_lock( children_lock_xp );
414	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
415	remote_spinlock_unlock( children_lock_xp );
416	}
417
418	// release the process PID to cluster manager
419	cluster_pid_release( process->pid );
420
421	// FIXME close all open files and update dirty [AG]
422
423	// decrease refcount for bin file, root file and cwd file
424	if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp );
425	if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp );
426	if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp );
427
428	// Destroy VMM
429	vmm_destroy( process );
430
431	// release memory allocated to process descriptor
432	process_free( process );
433
434	#if CONFIG_DEBUG_PROCESS_DESTROY
435	cycle = (uint32_t)hal_get_cycles();
436	if( CONFIG_DEBUG_PROCESS_DESTROY )
437	printk("\n[DBG] %s : thread %x exit / destroyed process %x (pid = %x) / cycle %d\n",
438	__FUNCTION__ , CURRENT_THREAD , process, process->pid, cycle );
439	#endif
440
441	} // end process_destroy()
442
443	/////////////////////////////////////////////////
444	char * process_action_str( uint32_t action_type )
445	{
446	if ( action_type == BLOCK_ALL_THREADS ) return "BLOCK";
447	else if( action_type == UNBLOCK_ALL_THREADS ) return "UNBLOCK";
448	else if( action_type == DELETE_ALL_THREADS ) return "DELETE";
449	else return "undefined";
450	}
451
452	////////////////////////////////////////////
453	void process_sigaction( process_t * process,
454	uint32_t action_type )
455	{
456	cxy_t owner_cxy; // owner cluster identifier
457	lpid_t lpid; // process index in owner cluster
458	cluster_t * cluster; // pointer on cluster manager
459	xptr_t root_xp; // extended pointer on root of copies
460	xptr_t lock_xp; // extended pointer on lock protecting copies
461	xptr_t iter_xp; // iterator on copies list
462	xptr_t process_xp; // extended pointer on process copy
463	cxy_t process_cxy; // process copy cluster identifier
464	process_t * process_ptr; // local pointer on process copy
465	uint32_t responses; // number of remote process copies
466	uint32_t rsp_count; // used to assert number of copies
467	rpc_desc_t rpc; // rpc descriptor allocated in stack
468
469	#if CONFIG_DEBUG_PROCESS_SIGACTION
470	uint32_t cycle = (uint32_t)hal_get_cycles();
471	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
472	printk("\n[DBG] %s : thread %x enter to %s process %x in cluster %x / cycle %d\n",
473	__FUNCTION__ , CURRENT_THREAD, process_action_str( action_type ) ,
474	process->pid , local_cxy , cycle );
475	#endif
476
477	thread_t * client = CURRENT_THREAD;
478
479	// get local pointer on local cluster manager
480	cluster = LOCAL_CLUSTER;
481
482	// get owner cluster identifier and process lpid
483	owner_cxy = CXY_FROM_PID( process->pid );
484	lpid = LPID_FROM_PID( process->pid );
485
486	// check owner cluster
487	assert( (owner_cxy == local_cxy) , __FUNCTION__ , "must be executed in owner cluster\n" );
488
489	// get number of remote copies
490	responses = cluster->pmgr.copies_nr[lpid] - 1;
491	rsp_count = 0;
492
493	// check action type
494	assert( ((action_type == DELETE_ALL_THREADS ) \|\|
495	(action_type == BLOCK_ALL_THREADS ) \|\|
496	(action_type == UNBLOCK_ALL_THREADS )), __FUNCTION__ , "illegal action type" );
497
498	// initialise rpc descriptor
499	rpc.index = RPC_PROCESS_SIGACTION;
500	rpc.response = responses;
501	rpc.blocking = false;
502	rpc.thread = client;
503
504	// get extended pointers on copies root and lock
505	root_xp = XPTR( local_cxy , &cluster->pmgr.copies_root[lpid] );
506	lock_xp = XPTR( local_cxy , &cluster->pmgr.copies_lock[lpid] );
507
508	// take the lock protecting the copies
509	remote_spinlock_lock( lock_xp );
510
511	// send RPCs to remote clusters
512	XLIST_FOREACH( root_xp , iter_xp )
513	{
514	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
515	process_cxy = GET_CXY( process_xp );
516	process_ptr = (process_t *)GET_PTR( process_xp );
517
518	// send RPC to remote clusters
519	if( process_cxy != local_cxy )
520	{
521
522	#if CONFIG_DEBUG_PROCESS_SIGACTION
523	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
524	printk("\n[DBG] %s : send RPC to remote cluster %x\n", __FUNCTION__ , process_cxy );
525	#endif
526
527	rpc.args[0] = (uint64_t)action_type;
528	rpc.args[1] = (uint64_t)(intptr_t)process_ptr;
529	rpc_process_sigaction_client( process_cxy , &rpc );
530	rsp_count++;
531	}
532	}
533
534	// release the lock protecting process copies
535	remote_spinlock_unlock( lock_xp );
536
537	// check number of copies...
538	assert( (rsp_count == responses) , __FUNCTION__ ,
539	"unconsistent number of process copies : rsp_count = %d / responses = %d",
540	rsp_count , responses );
541
542	// block and deschedule to wait RPC responses if required
543	if( responses )
544	{
545	thread_block( CURRENT_THREAD , THREAD_BLOCKED_RPC );
546	sched_yield("BLOCKED on RPC_PROCESS_SIGACTION");
547	}
548
549	#if CONFIG_DEBUG_PROCESS_SIGACTION
550	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
551	printk("\n[DBG] %s : make action in owner cluster %x\n", __FUNCTION__ , local_cxy );
552	#endif
553
554	// call directly the relevant function in local owner cluster
555	if (action_type == DELETE_ALL_THREADS ) process_delete_threads ( process );
556	else if (action_type == BLOCK_ALL_THREADS ) process_block_threads ( process );
557	else if (action_type == UNBLOCK_ALL_THREADS ) process_unblock_threads( process );
558
559	#if CONFIG_DEBUG_PROCESS_SIGACTION
560	cycle = (uint32_t)hal_get_cycles();
561	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
562	printk("\n[DBG] %s : thread %x exit after %s process %x in cluster %x / cycle %d\n",
563	__FUNCTION__ , CURRENT_THREAD, process_action_str( action_type ) ,
564	process->pid , local_cxy , cycle );
565	#endif
566
567	} // end process_sigaction()
568
569	/////////////////////////////////////////////////
570	void process_block_threads( process_t * process )
571	{
572	thread_t * target; // pointer on target thread
573	thread_t * this; // pointer on calling thread
574	uint32_t ltid; // index in process th_tbl
575	uint32_t count; // requests counter
576	volatile uint32_t rsp_count; // responses counter
577
578	// get calling thread pointer
579	this = CURRENT_THREAD;
580
581	#if CONFIG_DEBUG_PROCESS_SIGACTION
582	uint32_t cycle = (uint32_t)hal_get_cycles();
583	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
584	printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n",
585	__FUNCTION__ , this , process->pid , local_cxy , cycle );
586	#endif
587
588	// get lock protecting process th_tbl[]
589	spinlock_lock( &process->th_lock );
590
591	// initialize local responses counter
592	rsp_count = process->th_nr;
593
594	// loop on process threads to block and deschedule all threads in cluster
595	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
596	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
597	{
598	target = process->th_tbl[ltid];
599
600	assert( (target != this) , __FUNCTION__ , "calling thread cannot be a target\n" );
601
602	if( target != NULL ) // thread found
603	{
604	count++;
605
606	// - if the calling thread and the target thread are on the same core,
607	// we block the target thread, we don't need confirmation from scheduler,
608	// and we simply decrement the responses counter.
609	// - if the calling thread and the target thread are not running on the same
610	// core, we ask the target scheduler to acknowlege the blocking
611	// to be sure that the target thread is not running.
612
613	if( this->core->lid == target->core->lid )
614	{
615	// set the global blocked bit in target thread descriptor.
616	thread_block( target , THREAD_BLOCKED_GLOBAL );
617
618	// decrement responses counter
619	hal_atomic_add( (void *)&rsp_count , -1 );
620	}
621	else
622	{
623	// set the global blocked bit in target thread descriptor.
624	thread_block( target , THREAD_BLOCKED_GLOBAL );
625
626	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
627	thread_set_req_ack( target , (void *)&rsp_count );
628
629	// force scheduling on target thread
630	dev_pic_send_ipi( local_cxy , target->core->lid );
631	}
632	}
633	}
634
635	// release lock protecting process th_tbl[]
636	spinlock_unlock( &process->th_lock );
637
638	// wait all responses from schedulers
639	while( 1 )
640	{
641	// exit loop when all local responses received
642	if ( rsp_count == 0 ) break;
643
644	// wait 1000 cycles before retry
645	hal_fixed_delay( 1000 );
646	}
647
648	#if CONFIG_DEBUG_PROCESS_SIGACTION
649	cycle = (uint32_t)hal_get_cycles();
650	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
651	printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n",
652	__FUNCTION__ , this , process->pid , local_cxy , cycle );
653	#endif
654
655	} // end process_block_threads()
656
657	///////////////////////////////////////////////////
658	void process_unblock_threads( process_t * process )
659	{
660	thread_t * target; // pointer on target thead
661	thread_t * this; // pointer on calling thread
662	uint32_t ltid; // index in process th_tbl
663	uint32_t count; // requests counter
664
665	// get calling thread pointer
666	this = CURRENT_THREAD;
667
668	#if CONFIG_DEBUG_PROCESS_SIGACTION
669	uint32_t cycle = (uint32_t)hal_get_cycles();
670	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
671	printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n",
672	__FUNCTION__ , this , process->pid , local_cxy , cycle );
673	#endif
674
675	// get lock protecting process th_tbl[]
676	spinlock_lock( &process->th_lock );
677
678	// loop on process threads to unblock all threads in cluster
679	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
680	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
681	{
682	target = process->th_tbl[ltid];
683
684	assert( (target != this) , __FUNCTION__ , "calling thread cannot be a target\n" );
685
686	if( target != NULL ) // thread found
687	{
688	count++;
689
690	// reset the global blocked bit in target thread descriptor.
691	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
692	}
693	}
694
695	// release lock protecting process th_tbl[]
696	spinlock_unlock( &process->th_lock );
697
698	#if CONFIG_DEBUG_PROCESS_SIGACTION
699	cycle = (uint32_t)hal_get_cycles();
700	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
701	printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n",
702	__FUNCTION__ , this , process->pid , local_cxy , cycle );
703	#endif
704
705	} // end process_unblock_threads()
706
707	//////////////////////////////////////////////////
708	void process_delete_threads( process_t * process )
709	{
710	thread_t * target; // pointer on target thread
711	thread_t * this; // pointer on calling thread
712	uint32_t ltid; // index in process th_tbl
713	uint32_t count; // request counter
714	cxy_t owner_cxy; // owner cluster identifier
715
716	// get calling thread pointer
717	this = CURRENT_THREAD;
718	owner_cxy = CXY_FROM_PID( process->pid );
719
720	#if CONFIG_DEBUG_PROCESS_SIGACTION
721	uint32_t cycle = (uint32_t)hal_get_cycles();
722	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
723	printk("\n[DBG] %s : thread %x enter for process %x in cluster %x / cycle %d\n",
724	__FUNCTION__ , this , process->pid , local_cxy , cycle );
725	#endif
726
727	// get lock protecting process th_tbl[]
728	spinlock_lock( &process->th_lock );
729
730	// loop on threads to set the REQ_DELETE flag
731	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
732	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
733	{
734	target = process->th_tbl[ltid];
735
736	assert( (target != this) , __FUNCTION__ , "calling thread cannot be a target\n" );
737
738	if( target != NULL ) // thread found
739	{
740	count++;
741
742	// the main thread should not be deleted
743	if( (owner_cxy != local_cxy) \|\| (ltid != 0) )
744	{
745	hal_atomic_or( &target->flags , THREAD_FLAG_REQ_DELETE );
746	}
747	}
748	}
749
750	// release lock protecting process th_tbl[]
751	spinlock_unlock( &process->th_lock );
752
753	#if CONFIG_DEBUG_PROCESS_SIGACTION
754	cycle = (uint32_t)hal_get_cycles();
755	if( CONFIG_DEBUG_PROCESS_SIGACTION < cycle )
756	printk("\n[DBG] %s : thread %x exit for process %x in cluster %x / cycle %d\n",
757	__FUNCTION__ , this , process->pid , local_cxy , cycle );
758	#endif
759
760	} // end process_delete_threads()
761
762	///////////////////////////////////////////////
763	process_t * process_get_local_copy( pid_t pid )
764	{
765	error_t error;
766	process_t * process_ptr; // local pointer on process
767	xptr_t process_xp; // extended pointer on process
768
769	cluster_t * cluster = LOCAL_CLUSTER;
770
771	// get lock protecting local list of processes
772	remote_spinlock_lock( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
773
774	// scan the local list of process descriptors to find the process
775	xptr_t iter;
776	bool_t found = false;
777	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
778	{
779	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
780	process_ptr = (process_t *)GET_PTR( process_xp );
781	if( process_ptr->pid == pid )
782	{
783	found = true;
784	break;
785	}
786	}
787
788	// release lock protecting local list of processes
789	remote_spinlock_unlock( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
790
791	// allocate memory for a new local process descriptor
792	// and initialise it from reference cluster if required
793	if( !found )
794	{
795	// get extended pointer on reference process descriptor
796	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
797
798	assert( (ref_xp != XPTR_NULL) , __FUNCTION__ , "illegal pid\n" );
799
800	// allocate memory for local process descriptor
801	process_ptr = process_alloc();
802	if( process_ptr == NULL ) return NULL;
803
804	// initialize local process descriptor copy
805	error = process_copy_init( process_ptr , ref_xp );
806	if( error ) return NULL;
807	}
808
809	return process_ptr;
810
811	} // end process_get_local_copy()
812
813	//////////////////////////////////////////////////////////////////////////////////////////
814	// File descriptor array related functions
815	//////////////////////////////////////////////////////////////////////////////////////////
816
817	///////////////////////////////////////////
818	void process_fd_init( process_t * process )
819	{
820	uint32_t fd;
821
822	remote_spinlock_init( XPTR( local_cxy , &process->fd_array.lock ) );
823
824	process->fd_array.current = 0;
825
826	// initialize array
827	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
828	{
829	process->fd_array.array[fd] = XPTR_NULL;
830	}
831	}
832
833	//////////////////////////////
834	bool_t process_fd_array_full()
835	{
836	// get extended pointer on reference process
837	xptr_t ref_xp = CURRENT_THREAD->process->ref_xp;
838
839	// get reference process cluster and local pointer
840	process_t * ref_ptr = (process_t *)GET_PTR( ref_xp );
841	cxy_t ref_cxy = GET_CXY( ref_xp );
842
843	// get number of open file descriptors from reference fd_array
844	uint32_t current = hal_remote_lw( XPTR( ref_cxy , &ref_ptr->fd_array.current ) );
845
846	return ( current >= CONFIG_PROCESS_FILE_MAX_NR );
847	}
848
849	/////////////////////////////////////////////////
850	error_t process_fd_register( process_t * process,
851	xptr_t file_xp,
852	uint32_t * fdid )
853	{
854	bool_t found;
855	uint32_t id;
856	xptr_t xp;
857
858	// get reference process cluster and local pointer
859	xptr_t ref_xp = process->ref_xp;
860	process_t * ref_ptr = (process_t *)GET_PTR( ref_xp );
861	cxy_t ref_cxy = GET_CXY( ref_xp );
862
863	// take lock protecting reference fd_array
864	remote_spinlock_lock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) );
865
866	found = false;
867
868	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
869	{
870	xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) );
871	if ( xp == XPTR_NULL )
872	{
873	found = true;
874	hal_remote_swd( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp );
875	hal_remote_atomic_add( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , 1 );
876	*fdid = id;
877	break;
878	}
879	}
880
881	// release lock protecting reference fd_array
882	remote_spinlock_unlock( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) );
883
884	if ( !found ) return -1;
885	else return 0;
886	}
887
888	////////////////////////////////////////////////
889	xptr_t process_fd_get_xptr( process_t * process,
890	uint32_t fdid )
891	{
892	xptr_t file_xp;
893
894	// access local copy of process descriptor
895	file_xp = process->fd_array.array[fdid];
896
897	if( file_xp == XPTR_NULL )
898	{
899	// get reference process cluster and local pointer
900	xptr_t ref_xp = process->ref_xp;
901	cxy_t ref_cxy = GET_CXY( ref_xp );
902	process_t * ref_ptr = (process_t *)GET_PTR( ref_xp );
903
904	// access reference process descriptor
905	file_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) );
906
907	// update local fd_array if found
908	if( file_xp != XPTR_NULL )
909	{
910	process->fd_array.array[fdid] = file_xp;
911	}
912	}
913
914	return file_xp;
915
916	} // end process_fd_get_xptr()
917
918	///////////////////////////////////////////
919	void process_fd_remote_copy( xptr_t dst_xp,
920	xptr_t src_xp )
921	{
922	uint32_t fd;
923	xptr_t entry;
924
925	// get cluster and local pointer for src fd_array
926	cxy_t src_cxy = GET_CXY( src_xp );
927	fd_array_t * src_ptr = (fd_array_t *)GET_PTR( src_xp );
928
929	// get cluster and local pointer for dst fd_array
930	cxy_t dst_cxy = GET_CXY( dst_xp );
931	fd_array_t * dst_ptr = (fd_array_t *)GET_PTR( dst_xp );
932
933	// get the remote lock protecting the src fd_array
934	remote_spinlock_lock( XPTR( src_cxy , &src_ptr->lock ) );
935
936	// loop on all fd_array entries
937	for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
938	{
939	entry = (xptr_t)hal_remote_lwd( XPTR( src_cxy , &src_ptr->array[fd] ) );
940
941	if( entry != XPTR_NULL )
942	{
943	// increment file descriptor ref count
944	vfs_file_count_up( entry );
945
946	// copy entry in destination process fd_array
947	hal_remote_swd( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry );
948	}
949	}
950
951	// release lock on source process fd_array
952	remote_spinlock_unlock( XPTR( src_cxy , &src_ptr->lock ) );
953
954	} // end process_fd_remote_copy()
955
956	////////////////////////////////////////////////////////////////////////////////////
957	// Thread related functions
958	////////////////////////////////////////////////////////////////////////////////////
959
960	/////////////////////////////////////////////////////
961	error_t process_register_thread( process_t * process,
962	thread_t * thread,
963	trdid_t * trdid )
964	{
965	ltid_t ltid;
966	bool_t found = false;
967
968	assert( (process != NULL) , __FUNCTION__ , "process argument is NULL" );
969
970	assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" );
971
972	// take lock protecting th_tbl
973	spinlock_lock( &process->th_lock );
974
975	// search a free slot in th_tbl[]
976	for( ltid = 0 ; ltid < CONFIG_THREAD_MAX_PER_CLUSTER ; ltid++ )
977	{
978	if( process->th_tbl[ltid] == NULL )
979	{
980	found = true;
981	break;
982	}
983	}
984
985	if( found )
986	{
987	// register thread in th_tbl[]
988	process->th_tbl[ltid] = thread;
989	process->th_nr++;
990
991	// returns trdid
992	*trdid = TRDID( local_cxy , ltid );
993	}
994
995
996	// release lock protecting th_tbl
997	hal_fence();
998	spinlock_unlock( &process->th_lock );
999
1000	return (found) ? 0 : ENOMEM;
1001
1002	} // end process_register_thread()
1003
1004	///////////////////////////////////////////////
1005	void process_remove_thread( thread_t * thread )
1006	{
1007	assert( (thread != NULL) , __FUNCTION__ , "thread argument is NULL" );
1008
1009	process_t * process = thread->process;
1010
1011	// get thread local index
1012	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
1013
1014	// take lock protecting th_tbl
1015	spinlock_lock( &process->th_lock );
1016
1017	assert( (process->th_nr) , __FUNCTION__ , "process th_nr cannot be 0\n" );
1018
1019	// remove thread from th_tbl[]
1020	process->th_tbl[ltid] = NULL;
1021	process->th_nr--;
1022
1023	hal_fence();
1024
1025	// release lock protecting th_tbl
1026	spinlock_unlock( &process->th_lock );
1027
1028	} // process_remove_thread()
1029
1030	/////////////////////////////////////////////////////////
1031	error_t process_make_fork( xptr_t parent_process_xp,
1032	xptr_t parent_thread_xp,
1033	pid_t * child_pid,
1034	thread_t ** child_thread )
1035	{
1036	process_t * process; // local pointer on child process descriptor
1037	thread_t * thread; // local pointer on child thread descriptor
1038	pid_t new_pid; // process identifier for child process
1039	pid_t parent_pid; // process identifier for parent process
1040	xptr_t ref_xp; // extended pointer on reference process
1041	xptr_t vfs_bin_xp; // extended pointer on .elf file
1042	error_t error;
1043
1044	// get cluster and local pointer for parent process
1045	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
1046	process_t * parent_process_ptr = (process_t *)GET_PTR( parent_process_xp );
1047
1048	// get parent process PID and extended pointer on .elf file
1049	parent_pid = hal_remote_lw (XPTR( parent_process_cxy , &parent_process_ptr->pid));
1050	vfs_bin_xp = hal_remote_lwd(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
1051
1052	// check parent process is the reference
1053	ref_xp = hal_remote_lwd( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
1054	assert( (parent_process_xp == ref_xp ) , __FUNCTION__ ,
1055	"parent process must be the reference process\n" );
1056
1057	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1058	uint32_t cycle = (uint32_t)hal_get_cycles();
1059	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1060	printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n",
1061	__FUNCTION__, CURRENT_THREAD, parent_pid, cycle );
1062	#endif
1063
1064	// allocate a process descriptor
1065	process = process_alloc();
1066	if( process == NULL )
1067	{
1068	printk("\n[ERROR] in %s : cannot get process in cluster %x\n",
1069	__FUNCTION__, local_cxy );
1070	return -1;
1071	}
1072
1073	// allocate a child PID from local cluster
1074	error = cluster_pid_alloc( process , &new_pid );
1075	if( error )
1076	{
1077	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
1078	__FUNCTION__, local_cxy );
1079	process_free( process );
1080	return -1;
1081	}
1082
1083	// initializes child process descriptor from parent process descriptor
1084	process_reference_init( process,
1085	new_pid,
1086	parent_process_xp,
1087	parent_process_xp );
1088
1089	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1090	cycle = (uint32_t)hal_get_cycles();
1091	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1092	printk("\n[DBG] %s : thread %x created child_process %x / child_pid %x / cycle %d\n",
1093	__FUNCTION__, CURRENT_THREAD, process, new_pid, cycle );
1094	#endif
1095
1096	// copy VMM from parent descriptor to child descriptor
1097	error = vmm_fork_copy( process,
1098	parent_process_xp );
1099	if( error )
1100	{
1101	printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n",
1102	__FUNCTION__, local_cxy );
1103	process_free( process );
1104	cluster_pid_release( new_pid );
1105	return -1;
1106	}
1107
1108	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1109	cycle = (uint32_t)hal_get_cycles();
1110	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1111	printk("\n[DBG] %s : thread %x copied VMM from parent %x to child %x / cycle %d\n",
1112	__FUNCTION__ , CURRENT_THREAD , parent_pid, new_pid, cycle );
1113	#endif
1114
1115	// update extended pointer on .elf file
1116	process->vfs_bin_xp = vfs_bin_xp;
1117
1118	// create child thread descriptor from parent thread descriptor
1119	error = thread_user_fork( parent_thread_xp,
1120	process,
1121	&thread );
1122	if( error )
1123	{
1124	printk("\n[ERROR] in %s : cannot create thread in cluster %x\n",
1125	__FUNCTION__, local_cxy );
1126	process_free( process );
1127	cluster_pid_release( new_pid );
1128	return -1;
1129	}
1130
1131	// check main thread index
1132	assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" );
1133
1134	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1135	cycle = (uint32_t)hal_get_cycles();
1136	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1137	printk("\n[DBG] %s : thread %x created child thread %x / cycle %d\n",
1138	__FUNCTION__ , CURRENT_THREAD, thread, cycle );
1139	#endif
1140
1141	// set Copy_On_Write flag in parent process GPT
1142	// this includes all replicated GPT copies
1143	if( parent_process_cxy == local_cxy ) // reference is local
1144	{
1145	vmm_set_cow( parent_process_ptr );
1146	}
1147	else // reference is remote
1148	{
1149	rpc_vmm_set_cow_client( parent_process_cxy,
1150	parent_process_ptr );
1151	}
1152
1153	// set Copy_On_Write flag in child process GPT
1154	vmm_set_cow( process );
1155
1156	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1157	cycle = (uint32_t)hal_get_cycles();
1158	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1159	printk("\n[DBG] %s : thread %x set COW in parent and child / cycle %d\n",
1160	__FUNCTION__ , CURRENT_THREAD, cycle );
1161	#endif
1162
1163	// get extended pointers on parent children_root, children_lock and children_nr
1164	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
1165	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
1166	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
1167
1168	// register process in parent children list
1169	remote_spinlock_lock( children_lock_xp );
1170	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1171	hal_remote_atomic_add( children_nr_xp , 1 );
1172	remote_spinlock_unlock( children_lock_xp );
1173
1174	// return success
1175	*child_thread = thread;
1176	*child_pid = new_pid;
1177
1178	#if CONFIG_DEBUG_PROCESS_MAKE_FORK
1179	cycle = (uint32_t)hal_get_cycles();
1180	if( CONFIG_DEBUG_PROCESS_MAKE_FORK < cycle )
1181	printk("\n[DBG] %s : thread %x exit / cycle %d\n",
1182	__FUNCTION__, CURRENT_THREAD, cycle );
1183	#endif
1184
1185	return 0;
1186
1187	} // end process_make_fork()
1188
1189
1190	/////////////////////////////////////////////////////
1191	error_t process_make_exec( exec_info_t * exec_info )
1192	{
1193	char * path; // pathname to .elf file
1194	pid_t pid; // old_process PID / given to new_process
1195	pid_t temp_pid; // temporary PID / given to old_process
1196	process_t * old_process; // local pointer on old process
1197	thread_t * old_thread; // local pointer on old thread
1198	process_t * new_process; // local pointer on new process
1199	thread_t * new_thread; // local pointer on new thread
1200	xptr_t parent_xp; // extended pointer on parent process
1201	pthread_attr_t attr; // new thread attributes
1202	lid_t lid; // selected core local index
1203	error_t error;
1204
1205	// get old_thread / old_process / PID / parent_xp
1206	old_thread = CURRENT_THREAD;
1207	old_process = old_thread->process;
1208	pid = old_process->pid;
1209	parent_xp = old_process->parent_xp;
1210
1211	// get .elf pathname from exec_info
1212	path = exec_info->path;
1213
1214	// this function must be executed by a thread running in owner cluster
1215	assert( (CXY_FROM_PID( pid ) == local_cxy), __FUNCTION__,
1216	"local_cluster must be owner_cluster\n" );
1217
1218	assert( (LTID_FROM_TRDID( old_thread->trdid ) == 0) , __FUNCTION__,
1219	"must be called by the main thread\n" );
1220
1221	#if CONFIG_DEBUG_PROCESS_MAKE_EXEC
1222	uint32_t cycle = (uint32_t)hal_get_cycles();
1223	if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle )
1224	printk("\n[DBG] %s : thread %x enters for process %x / %s / cycle %d\n",
1225	__FUNCTION__, old_thread, pid, path, cycle );
1226	#endif
1227
1228	// allocate memory for new_process descriptor
1229	new_process = process_alloc();
1230
1231	if( new_process == NULL )
1232	{
1233	printk("\n[ERROR] in %s : cannot allocate process descriptor in cluster %x\n",
1234	__FUNCTION__ , local_cxy );
1235	return -1;
1236	}
1237
1238	// get a temporary PID for old_process
1239	error = cluster_pid_alloc( old_process , &temp_pid );
1240	if( error )
1241	{
1242	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
1243	__FUNCTION__ , local_cxy );
1244	process_free( new_process );
1245	return -1;
1246	}
1247
1248	// set temporary PID to old_process
1249	old_process->pid = temp_pid;
1250
1251	// initialize new process descriptor
1252	process_reference_init( new_process,
1253	pid,
1254	parent_xp, // parent_process_xp
1255	XPTR(local_cxy , old_process) ); // model_process
1256
1257	// give TXT ownership to new_process
1258	process_txt_set_ownership( XPTR( local_cxy , new_process ) );
1259
1260	#if CONFIG_DEBUG_PROCESS_MAKE_EXEC
1261	cycle = (uint32_t)hal_get_cycles();
1262	if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle )
1263	printk("\n[DBG] %s : thread %x created new process %x / cycle %d \n",
1264	__FUNCTION__ , old_thread , new_process , cycle );
1265	#endif
1266
1267	// register code & data vsegs as well as entry-point in new process VMM,
1268	// and register extended pointer on .elf file in process descriptor
1269	if( elf_load_process( path , new_process ) )
1270	{
1271	printk("\n[ERROR] in %s : failed to access .elf file for path %s\n",
1272	__FUNCTION__ , path );
1273	process_destroy( new_process );
1274	return -1;
1275	}
1276
1277	#if CONFIG_DEBUG_PROCESS_MAKE_EXEC
1278	cycle = (uint32_t)hal_get_cycles();
1279	if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle )
1280	printk("\n[DBG] %s : thread %x registered code/data vsegs in new process %x / cycle %d\n",
1281	__FUNCTION__, old_thread , new_process->pid , cycle );
1282	#endif
1283
1284	// select a core in local cluster to execute the main thread
1285	lid = cluster_select_local_core();
1286
1287	// initialize pthread attributes for main thread
1288	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
1289	attr.cxy = local_cxy;
1290	attr.lid = lid;
1291
1292	// create and initialize main thread in local cluster
1293	error = thread_user_create( pid,
1294	(void *)new_process->vmm.entry_point,
1295	exec_info->args_pointers,
1296	&attr,
1297	&new_thread );
1298	if( error )
1299	{
1300	printk("\n[ERROR] in %s : cannot create thread for process %x\n",
1301	__FUNCTION__ , new_process );
1302	process_destroy( new_process );
1303	return -1;
1304	}
1305
1306	// check main thread index
1307	assert( (new_thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" );
1308
1309	#if CONFIG_DEBUG_PROCESS_MAKE_EXEC
1310	cycle = (uint32_t)hal_get_cycles();
1311	if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle )
1312	printk("\n[DBG] %s : thread %x created new_process main thread %x / cycle %d\n",
1313	__FUNCTION__ , old_thread , new_thread , cycle );
1314	#endif
1315
1316	// get cluster and local pointer on parent process
1317	process_t * parent_ptr = GET_PTR( parent_xp );
1318	cxy_t parent_cxy = GET_CXY( parent_xp );
1319
1320	// get extended pointers on parent children_root, children_lock and children_nr
1321	xptr_t root_xp = XPTR( parent_cxy , &parent_ptr->children_root );
1322	xptr_t lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
1323	xptr_t nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
1324
1325	// register new_process in parent children list
1326	remote_spinlock_lock( lock_xp );
1327	xlist_add_last( root_xp , XPTR( local_cxy , &new_process->children_list ) );
1328	hal_remote_atomic_add( nr_xp , 1 );
1329	remote_spinlock_unlock( lock_xp );
1330
1331	// activate new thread
1332	thread_unblock( XPTR( local_cxy , new_thread ) , THREAD_BLOCKED_GLOBAL );
1333
1334	// request old_thread destruction => old_process destruction
1335	thread_block( old_thread , THREAD_BLOCKED_GLOBAL );
1336	hal_atomic_or( &old_thread->flags , THREAD_FLAG_REQ_DELETE );
1337
1338	hal_fence();
1339
1340	#if CONFIG_DEBUG_PROCESS_MAKE_EXEC
1341	cycle = (uint32_t)hal_get_cycles();
1342	if( CONFIG_DEBUG_PROCESS_MAKE_EXEC < cycle )
1343	printk("\n[DBG] %s : old_thread %x blocked / new_thread %x activated / cycle %d\n",
1344	__FUNCTION__ , old_thread , new_thread , cycle );
1345	#endif
1346
1347	return 0;
1348
1349	} // end process_make_exec()
1350
1351	////////////////////////////////////////////
1352	void process_make_kill( process_t * process,
1353	bool_t is_exit,
1354	uint32_t exit_status )
1355	{
1356	thread_t * this = CURRENT_THREAD;
1357
1358	assert( (CXY_FROM_PID( process->pid ) == local_cxy) , __FUNCTION__ ,
1359	"must be executed in process owner cluster\n" );
1360
1361	assert( ( this->type == THREAD_RPC ) , __FUNCTION__ ,
1362	"must be executed by an RPC thread\n" );
1363
1364	#if CONFIG_DEBUG_PROCESS_MAKE_KILL
1365	uint32_t cycle = (uint32_t)hal_get_cycles();
1366	if( CONFIG_DEBUG_PROCESS_MAKE_KILL < cycle )
1367	printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n",
1368	__FUNCTION__, this , process->pid , cycle );
1369	#endif
1370
1371	// register exit_status in owner process descriptor
1372	if( is_exit ) process->term_state = exit_status;
1373
1374	// atomically update owner process descriptor flags
1375	if( is_exit ) hal_atomic_or( &process->term_state , PROCESS_FLAG_EXIT );
1376	else hal_atomic_or( &process->term_state , PROCESS_FLAG_KILL );
1377
1378	// remove TXT ownership from owner process descriptor
1379	process_txt_reset_ownership( XPTR( local_cxy , process ) );
1380
1381	// block all process threads in all clusters
1382	process_sigaction( process , BLOCK_ALL_THREADS );
1383
1384	// mark all process threads in all clusters for delete
1385	process_sigaction( process , DELETE_ALL_THREADS );
1386
1387	/* unused if sys_wait deschedules without blocking [AG]
1388
1389	// get cluster and pointers on reference parent process
1390	xptr_t parent_xp = process->parent_xp;
1391	process_t * parent_ptr = GET_PTR( parent_xp );
1392	cxy_t parent_cxy = GET_CXY( parent_xp );
1393
1394	// get loal pointer on parent main thread
1395	thread_t * main_ptr = hal_remote_lpt( XPTR( parent_cxy , &parent_ptr->th_tbl[0] ) );
1396
1397	// reset THREAD_BLOCKED_WAIT bit in parent process main thread
1398	thread_unblock( XPTR( parent_cxy , main_ptr ) , THREAD_BLOCKED_WAIT );
1399	*/
1400
1401	#if CONFIG_DEBUG_PROCESS_MAKE_KILL
1402	cycle = (uint32_t)hal_get_cycles();
1403	if( CONFIG_DEBUG_PROCESS_MAKE_KILL < cycle )
1404	printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n",
1405	__FUNCTION__, this, process->pid , cycle );
1406	#endif
1407
1408	} // end process_make_kill()
1409
1410	///////////////////////////////////////////////
1411	void process_zero_create( process_t * process )
1412	{
1413
1414	#if CONFIG_DEBUG_PROCESS_ZERO_CREATE
1415	uint32_t cycle = (uint32_t)hal_get_cycles();
1416	if( CONFIG_DEBUG_PROCESS_ZERO_CREATE < cycle )
1417	printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle );
1418	#endif
1419
1420	// initialize PID, REF_XP, PARENT_XP, and STATE
1421	process->pid = 0;
1422	process->ref_xp = XPTR( local_cxy , process );
1423	process->parent_xp = XPTR_NULL;
1424	process->term_state = 0;
1425
1426	// reset th_tbl[] array as empty
1427	uint32_t i;
1428	for( i = 0 ; i < CONFIG_THREAD_MAX_PER_CLUSTER ; i++ )
1429	{
1430	process->th_tbl[i] = NULL;
1431	}
1432	process->th_nr = 0;
1433	spinlock_init( &process->th_lock );
1434
1435	// reset children list as empty
1436	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
1437	remote_spinlock_init( XPTR( local_cxy , &process->children_lock ) );
1438	process->children_nr = 0;
1439
1440	hal_fence();
1441
1442	#if CONFIG_DEBUG_PROCESS_ZERO_CREATE
1443	cycle = (uint32_t)hal_get_cycles();
1444	if( CONFIG_DEBUG_PROCESS_ZERO_CREATE < cycle )
1445	printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle );
1446	#endif
1447
1448	} // end process_zero_init()
1449
1450	//////////////////////////
1451	void process_init_create()
1452	{
1453	process_t * process; // local pointer on process descriptor
1454	pid_t pid; // process_init identifier
1455	thread_t * thread; // local pointer on main thread
1456	pthread_attr_t attr; // main thread attributes
1457	lid_t lid; // selected core local index for main thread
1458	error_t error;
1459
1460	#if CONFIG_DEBUG_PROCESS_INIT_CREATE
1461	uint32_t cycle = (uint32_t)hal_get_cycles();
1462	if( CONFIG_DEBUG_PROCESS_INIT_CREATE < cycle )
1463	printk("\n[DBG] %s : thread %x enter / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle );
1464	#endif
1465
1466	// allocates memory for process descriptor from local cluster
1467	process = process_alloc();
1468	if( process == NULL )
1469	{
1470	printk("\n[PANIC] in %s : no memory for process descriptor in cluster %x\n",
1471	__FUNCTION__, local_cxy );
1472	}
1473
1474	// get PID from local cluster
1475	error = cluster_pid_alloc( process , &pid );
1476	if( error )
1477	{
1478	printk("\n[PANIC] in %s : cannot allocate PID in cluster %x\n",
1479	__FUNCTION__, local_cxy );
1480	process_free( process );
1481	}
1482
1483	// check allocated PID
1484	assert( (pid == 1) , __FUNCTION__ , "process INIT must be first process in cluster 0\n" );
1485
1486	// initialize process descriptor / parent is local process_zero
1487	process_reference_init( process,
1488	pid,
1489	XPTR( local_cxy , &process_zero ), // parent
1490	XPTR( local_cxy , &process_zero ) ); // model
1491
1492	// register "code" and "data" vsegs as well as entry-point
1493	// in process VMM, using information contained in the elf file.
1494	if( elf_load_process( CONFIG_PROCESS_INIT_PATH , process ) )
1495	{
1496	printk("\n[PANIC] in %s : cannot access .elf file / path = %s\n",
1497	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
1498	process_destroy( process );
1499	}
1500
1501	// get extended pointers on process_zero children_root, children_lock
1502	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
1503	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
1504
1505	// register process INIT in parent local process_zero
1506	remote_spinlock_lock( children_lock_xp );
1507	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1508	hal_atomic_add( &process_zero.children_nr , 1 );
1509	remote_spinlock_unlock( children_lock_xp );
1510
1511	// select a core in local cluster to execute the main thread
1512	lid = cluster_select_local_core();
1513
1514	// initialize pthread attributes for main thread
1515	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
1516	attr.cxy = local_cxy;
1517	attr.lid = lid;
1518
1519	// create and initialize thread descriptor
1520	error = thread_user_create( pid,
1521	(void *)process->vmm.entry_point,
1522	NULL,
1523	&attr,
1524	&thread );
1525	if( error )
1526	{
1527	printk("\n[PANIC] in %s : cannot create main thread / path = %s\n",
1528	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
1529	process_destroy( process );
1530	}
1531
1532	// check main thread index
1533	assert( (thread->trdid == 0) , __FUNCTION__ , "main thread must have index 0\n" );
1534
1535	// activate thread
1536	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1537
1538	hal_fence();
1539
1540	#if CONFIG_DEBUG_PROCESS_INIT_CREATE
1541	cycle = (uint32_t)hal_get_cycles();
1542	if( CONFIG_DEBUG_PROCESS_INIT_CREATE < cycle )
1543	printk("\n[DBG] %s : thread %x exit / cycle %d\n", __FUNCTION__, CURRENT_THREAD, cycle );
1544	#endif
1545
1546	} // end process_init_create()
1547
1548	/////////////////////////////////////////
1549	void process_display( xptr_t process_xp )
1550	{
1551	process_t * process_ptr;
1552	cxy_t process_cxy;
1553	xptr_t parent_xp; // extended pointer on parent process
1554	process_t * parent_ptr;
1555	cxy_t parent_cxy;
1556
1557	pid_t pid;
1558	pid_t ppid;
1559	uint32_t state;
1560	xptr_t ref_xp;
1561	uint32_t th_nr;
1562
1563	xptr_t txt_file_xp; // extended pointer on TXT_RX pseudo file
1564	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1565	chdev_t * chdev_ptr;
1566	cxy_t chdev_cxy;
1567	xptr_t owner_xp; // extended pointer on TXT owner process
1568
1569	xptr_t elf_file_xp; // extended pointer on .elf file
1570	cxy_t elf_file_cxy;
1571	vfs_file_t * elf_file_ptr;
1572	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
1573
1574	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
1575	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
1576
1577	// get cluster and local pointer on process
1578	process_ptr = GET_PTR( process_xp );
1579	process_cxy = GET_CXY( process_xp );
1580
1581	// check reference process
1582	ref_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->ref_xp ) );
1583	assert( (process_xp == ref_xp) , __FUNCTION__ , "process is not the reference\n");
1584
1585	// get PID and state
1586	pid = hal_remote_lw( XPTR( process_cxy , &process_ptr->pid ) );
1587	state = hal_remote_lw( XPTR( process_cxy , &process_ptr->term_state ) );
1588
1589	// get PPID
1590	parent_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->parent_xp ) );
1591	parent_cxy = GET_CXY( parent_xp );
1592	parent_ptr = GET_PTR( parent_xp );
1593	ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) );
1594
1595	// get number of threads
1596	th_nr = hal_remote_lw( XPTR( process_cxy , &process_ptr->th_nr ) );
1597
1598	// get TXT name and process owner
1599	txt_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
1600
1601	assert( (txt_file_xp != XPTR_NULL) , __FUNCTION__ ,
1602	"process must be attached to one TXT terminal\n" );
1603
1604	chdev_xp = chdev_from_file( txt_file_xp );
1605	chdev_cxy = GET_CXY( chdev_xp );
1606	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
1607	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
1608	XPTR( chdev_cxy , chdev_ptr->name ) );
1609	owner_xp = (xptr_t)hal_remote_lwd( XPTR( chdev_cxy , &chdev_ptr->ext.txt.owner_xp ) );
1610
1611	// get process .elf name
1612	elf_file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
1613
1614	elf_file_cxy = GET_CXY( elf_file_xp );
1615	elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp );
1616	elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
1617	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
1618
1619	// display process info
1620	if( owner_xp == process_xp )
1621	{
1622	printk("PID %X \| PPID %X \| STS %X \| %s (FG) \| %X \| %d \| %s\n",
1623	pid, ppid, state, txt_name, process_ptr, th_nr, elf_name );
1624	}
1625	else
1626	{
1627	printk("PID %X \| PPID %X \| STS %X \| %s (BG) \| %X \| %d \| %s\n",
1628	pid, ppid, state, txt_name, process_ptr, th_nr, elf_name );
1629	}
1630	} // end process_display()
1631
1632
1633	////////////////////////////////////////////////////////////////////////////////////////
1634	// Terminals related functions
1635	////////////////////////////////////////////////////////////////////////////////////////
1636
1637	////////////////////////////
1638	uint32_t process_txt_alloc()
1639	{
1640	uint32_t index; // TXT terminal index
1641	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1642	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1643	cxy_t chdev_cxy; // TXT_RX chdev cluster
1644	xptr_t root_xp; // extended pointer on owner field in chdev
1645
1646	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
1647	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
1648	{
1649	// get pointers on TXT_RX[index]
1650	chdev_xp = chdev_dir.txt_rx[index];
1651	chdev_cxy = GET_CXY( chdev_xp );
1652	chdev_ptr = GET_PTR( chdev_xp );
1653
1654	// get extended pointer on root of attached process
1655	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
1656
1657	// return free TXT index if found
1658	if( xlist_is_empty( root_xp ) ) return index;
1659	}
1660
1661	assert( false , __FUNCTION__ , "no free TXT terminal found" );
1662
1663	return -1;
1664
1665	} // end process_txt_alloc()
1666
1667	/////////////////////////////////////////////
1668	void process_txt_attach( process_t * process,
1669	uint32_t txt_id )
1670	{
1671	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1672	cxy_t chdev_cxy; // TXT_RX chdev cluster
1673	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1674	xptr_t root_xp; // extended pointer on list root in chdev
1675	xptr_t lock_xp; // extended pointer on list lock in chdev
1676
1677	#if CONFIG_DEBUG_PROCESS_TXT_ATTACH
1678	uint32_t cycle = (uint32_t)hal_get_cycles();
1679	if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle )
1680	printk("\n[DBG] %s : thread %x enter for process %x / txt_id = %d / cycle %d\n",
1681	__FUNCTION__, CURRENT_THREAD, process->pid, txt_id, cycle );
1682	#endif
1683
1684	// check process is reference
1685	assert( (process->ref_xp == XPTR( local_cxy , process )) , __FUNCTION__ ,
1686	"process is not the reference descriptor" );
1687
1688	// check terminal index
1689	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
1690	__FUNCTION__ , "illegal TXT terminal index" );
1691
1692	// get pointers on TXT_RX[txt_id] chdev
1693	chdev_xp = chdev_dir.txt_rx[txt_id];
1694	chdev_cxy = GET_CXY( chdev_xp );
1695	chdev_ptr = GET_PTR( chdev_xp );
1696
1697	// get extended pointer on root & lock of attached process list
1698	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
1699	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
1700
1701	// insert process in attached process list
1702	remote_spinlock_lock( lock_xp );
1703	xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) );
1704	remote_spinlock_unlock( lock_xp );
1705
1706	#if CONFIG_DEBUG_PROCESS_TXT_ATTACH
1707	cycle = (uint32_t)hal_get_cycles();
1708	if( CONFIG_DEBUG_PROCESS_TXT_ATTACH < cycle )
1709	printk("\n[DBG] %s : thread %x exit for process %x / txt_id = %d / cycle %d\n",
1710	__FUNCTION__, CURRENT_THREAD, process->pid, txt_id , cycle );
1711	#endif
1712
1713	} // end process_txt_attach()
1714
1715	//////////////////////////////////////////////
1716	void process_txt_detach( process_t * process )
1717	{
1718	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1719	cxy_t chdev_cxy; // TXT_RX chdev cluster
1720	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1721	xptr_t lock_xp; // extended pointer on list lock in chdev
1722
1723	#if CONFIG_DEBUG_PROCESS_TXT_DETACH
1724	uint32_t cycle = (uint32_t)hal_get_cycles();
1725	if( CONFIG_DEBUG_PROCESS_TXT_DETACH < cycle )
1726	printk("\n[DBG] %s : thread %x enter for process %x / cycle %d\n",
1727	__FUNCTION__, CURRENT_THREAD, process->pid , cycle );
1728	#endif
1729
1730	// check process is reference
1731	assert( (process->ref_xp == XPTR( local_cxy , process )) , __FUNCTION__ ,
1732	"process is not the reference descriptor" );
1733
1734	// get extended pointer on TXT_RX chdev
1735	chdev_xp = chdev_from_file( process->fd_array.array[0] );
1736	chdev_cxy = GET_CXY( chdev_xp );
1737	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
1738
1739	// get extended pointer on lock of attached process list
1740	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
1741
1742	// unlink process from attached process list
1743	remote_spinlock_lock( lock_xp );
1744	xlist_unlink( XPTR( local_cxy , &process->txt_list ) );
1745	remote_spinlock_unlock( lock_xp );
1746
1747	#if CONFIG_DEBUG_PROCESS_TXT_DETACH
1748	cycle = (uint32_t)hal_get_cycles();
1749	if( CONFIG_DEBUG_PROCESS_TXT_DETACH < cycle )
1750	printk("\n[DBG] %s : thread %x exit for process %x / cycle %d\n",
1751	__FUNCTION__, CURRENT_THREAD, process->pid, cycle );
1752	#endif
1753
1754	} // end process_txt_detach()
1755
1756	///////////////////////////////////////////////////
1757	void process_txt_set_ownership( xptr_t process_xp )
1758	{
1759	process_t * process_ptr;
1760	cxy_t process_cxy;
1761	xptr_t file_xp;
1762	xptr_t txt_xp;
1763	chdev_t * txt_ptr;
1764	cxy_t txt_cxy;
1765
1766	// get cluster and local pointer on process
1767	process_cxy = GET_CXY( process_xp );
1768	process_ptr = (process_t *)GET_PTR( process_xp );
1769
1770	// get extended pointer on stdin pseudo file
1771	file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
1772
1773	// get pointers on TXT chdev
1774	txt_xp = chdev_from_file( file_xp );
1775	txt_cxy = GET_CXY( txt_xp );
1776	txt_ptr = (chdev_t *)GET_PTR( txt_xp );
1777
1778	// set owner field in TXT chdev
1779	hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
1780
1781	} // end process_txt_set ownership()
1782
1783	/////////////////////////////////////////////////////
1784	void process_txt_reset_ownership( xptr_t process_xp )
1785	{
1786	process_t * process_ptr;
1787	cxy_t process_cxy;
1788	xptr_t parent_xp; // extended pointer on parent process
1789	process_t * parent_ptr;
1790	cxy_t parent_cxy;
1791	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
1792	xptr_t txt_xp; // extended pointer on TXT_RX chdev
1793	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
1794	cxy_t txt_cxy; // cluster of TXT_RX chdev
1795	uint32_t txt_id; // TXT_RX channel
1796	xptr_t owner_xp; // extended pointer on current TXT_RX owner
1797	xptr_t root_xp; // extended pointer on root of attached process list
1798	xptr_t iter_xp; // iterator for xlist
1799	xptr_t current_xp; // extended pointer on current process
1800	process_t * current_ptr; // local pointer on current process
1801	cxy_t current_cxy; // cluster for current process
1802	pid_t ppid; // parent process identifier for current process
1803
1804	// get cluster and local pointer on process
1805	process_cxy = GET_CXY( process_xp );
1806	process_ptr = (process_t *)GET_PTR( process_xp );
1807
1808	// get extended pointer on stdin pseudo file
1809	file_xp = hal_remote_lwd( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
1810
1811	// get pointers on TXT chdev
1812	txt_xp = chdev_from_file( file_xp );
1813	txt_cxy = GET_CXY( txt_xp );
1814	txt_ptr = GET_PTR( txt_xp );
1815
1816	// get extended pointer on TXT_RX owner and TXT channel
1817	owner_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
1818	txt_id = hal_remote_lw ( XPTR( txt_cxy , &txt_ptr->channel ) );
1819
1820	// transfer ownership to KSH if required
1821	if( (owner_xp == process_xp) && (txt_id > 0) )
1822	{
1823	// get extended pointer on root of list of attached processes
1824	root_xp = hal_remote_lwd( XPTR( txt_cxy , &txt_ptr->ext.txt.root ) );
1825
1826	// scan attached process list to find KSH process
1827	XLIST_FOREACH( root_xp , iter_xp )
1828	{
1829	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
1830	current_cxy = GET_CXY( current_xp );
1831	current_ptr = GET_PTR( current_xp );
1832	parent_xp = hal_remote_lwd( XPTR( current_cxy , &current_ptr->parent_xp ) );
1833
1834	parent_cxy = GET_CXY( parent_xp );
1835	parent_ptr = GET_PTR( parent_xp );
1836	ppid = hal_remote_lw( XPTR( parent_cxy , &parent_ptr->pid ) );
1837
1838	if( ppid == 1 ) // current is KSH
1839	{
1840	// set owner field in TXT chdev
1841	hal_remote_swd( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
1842	return;
1843	}
1844	}
1845
1846	assert( false , __FUNCTION__ , "KSH process not found" );
1847	}
1848	} // end process_txt_reset_ownership()
1849
1850
1851

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