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source: trunk/kernel/kern/process.c @ 662

Last change on this file since 662 was 662, checked in by alain, 4 years ago
Introduce the ksocket.h & ksocket.c files in kernel/kern.
File size: 94.0 KB

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1	/*
2	* process.c - process related functions definition.
3	*
4	* Authors Ghassan Almaless (2008,2009,2010,2011,2012)
5	* Mohamed Lamine Karaoui (2015)
6	* Alain Greiner (2016,2017,2018,2019,2020)
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_kernel_types.h>
28	#include <hal_remote.h>
29	#include <hal_uspace.h>
30	#include <hal_irqmask.h>
31	#include <hal_vmm.h>
32	#include <errno.h>
33	#include <printk.h>
34	#include <memcpy.h>
35	#include <bits.h>
36	#include <kmem.h>
37	#include <page.h>
38	#include <vmm.h>
39	#include <vfs.h>
40	#include <core.h>
41	#include <thread.h>
42	#include <chdev.h>
43	#include <list.h>
44	#include <string.h>
45	#include <scheduler.h>
46	#include <busylock.h>
47	#include <queuelock.h>
48	#include <remote_queuelock.h>
49	#include <rwlock.h>
50	#include <remote_rwlock.h>
51	#include <dqdt.h>
52	#include <cluster.h>
53	#include <ppm.h>
54	#include <boot_info.h>
55	#include <process.h>
56	#include <elf.h>
57	#include <syscalls.h>
58	#include <shared_syscalls.h>
59
60	//////////////////////////////////////////////////////////////////////////////////////////
61	// Extern global variables
62	//////////////////////////////////////////////////////////////////////////////////////////
63
64	extern process_t process_zero; // allocated in kernel_init.c
65	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
66
67	//////////////////////////////////////////////////////////////////////////////////////////
68	// Process initialisation related functions
69	//////////////////////////////////////////////////////////////////////////////////////////
70
71	/////////////////////////////////
72	process_t * process_alloc( void )
73	{
74	kmem_req_t req;
75
76	req.type = KMEM_KCM;
77	req.order = bits_log2( sizeof(process_t) );
78	req.flags = AF_KERNEL;
79
80	return kmem_alloc( &req );
81	}
82
83	////////////////////////////////////////
84	void process_free( process_t * process )
85	{
86	kmem_req_t req;
87
88	req.type = KMEM_KCM;
89	req.ptr = process;
90	kmem_free( &req );
91	}
92
93	////////////////////////////////////////////////////
94	error_t process_reference_init( process_t * process,
95	pid_t pid,
96	xptr_t parent_xp )
97	{
98	error_t error;
99	xptr_t process_xp;
100	cxy_t parent_cxy;
101	process_t * parent_ptr;
102	xptr_t stdin_xp;
103	xptr_t stdout_xp;
104	xptr_t stderr_xp;
105	uint32_t stdin_id;
106	uint32_t stdout_id;
107	uint32_t stderr_id;
108	uint32_t txt_id;
109	char rx_path[40];
110	char tx_path[40];
111	xptr_t file_xp;
112	xptr_t chdev_xp;
113	chdev_t * chdev_ptr;
114	cxy_t chdev_cxy;
115	pid_t parent_pid;
116	vmm_t * vmm;
117
118	// build extended pointer on this reference process
119	process_xp = XPTR( local_cxy , process );
120
121	// get pointer on process vmm
122	vmm = &process->vmm;
123
124	// get parent process cluster and local pointer
125	parent_cxy = GET_CXY( parent_xp );
126	parent_ptr = GET_PTR( parent_xp );
127
128	// get parent_pid
129	parent_pid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
130
131	#if DEBUG_PROCESS_REFERENCE_INIT
132	thread_t * this = CURRENT_THREAD;
133	uint32_t cycle = (uint32_t)hal_get_cycles();
134	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
135	printk("\n[%s] thread[%x,%x] enter to initialize process %x / cycle %d\n",
136	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
137	#endif
138
139	// initialize pid, ref_xp, parent_xp, owner_xp, term_state fields
140	process->pid = pid;
141	process->ref_xp = XPTR( local_cxy , process );
142	process->owner_xp = XPTR( local_cxy , process );
143	process->parent_xp = parent_xp;
144	process->term_state = 0;
145
146	// initialize VFS root inode and CWD inode
147	process->vfs_root_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->vfs_root_xp ) );
148	process->cwd_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->cwd_xp ) );
149
150	// initialize VSL as empty
151	vmm->vsegs_nr = 0;
152	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
153
154	// create an empty GPT as required by the architecture
155	error = hal_gpt_create( &vmm->gpt );
156	if( error )
157	{
158	printk("\n[ERROR] in %s : cannot create empty GPT\n", __FUNCTION__ );
159	return -1;
160	}
161
162	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
163	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
164	printk("\n[%s] thread[%x,%x] created empty GPT for process %x\n",
165	__FUNCTION__, parent_pid, this->trdid, pid );
166	#endif
167
168	// initialize VSL lock
169	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
170
171	// register kernel vsegs in user process VMM as required by the architecture
172	error = hal_vmm_kernel_update( process );
173	if( error )
174	{
175	printk("\n[ERROR] in %s : cannot register kernel vsegs in VMM\n", __FUNCTION__ );
176	return -1;
177	}
178
179	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
180	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
181	printk("\n[%s] thread[%x,%x] registered kernel vsegs in VSL for process %x\n",
182	__FUNCTION__, parent_pid, this->trdid, pid );
183	#endif
184
185	// create "args" and "envs" vsegs
186	// create "stacks" and "mmap" vsegs allocators
187	// initialize locks protecting GPT and VSL
188	error = vmm_user_init( process );
189	if( error )
190	{
191	printk("\n[ERROR] in %s : cannot register user vsegs in VMM\n", __FUNCTION__ );
192	return -1;
193	}
194
195	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
196	cycle = (uint32_t)hal_get_cycles();
197	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
198	printk("\n[%s] thread[%x,%x] initialized vmm for process %x\n",
199	__FUNCTION__, parent_pid, this->trdid, pid );
200	#endif
201
202	// initialize fd_array as empty
203	process_fd_init( process );
204
205	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
206	if( (pid == 1) \|\| (parent_pid == 1) ) // INIT or KSH process
207	{
208	// select a TXT channel
209	if( pid == 1 ) txt_id = 0; // INIT
210	else txt_id = process_txt_alloc(); // KSH
211
212	// attach process to TXT
213	process_txt_attach( process , txt_id );
214
215	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
216	cycle = (uint32_t)hal_get_cycles();
217	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
218	printk("\n[%s] thread[%x,%x] / process %x attached to TXT%d / cycle %d\n",
219	__FUNCTION__, parent_pid, this->trdid, pid, txt_id, cycle );
220	#endif
221	// build path to TXT_RX[i] and TXT_TX[i] chdevs
222	snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
223	snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
224
225	// create stdin pseudo file
226	error = vfs_open( process->vfs_root_xp,
227	rx_path,
228	process_xp,
229	O_RDONLY,
230	0, // FIXME chmod
231	&stdin_xp,
232	&stdin_id );
233	if( error )
234	{
235	printk("\n[ERROR] in %s : cannot open stdout pseudo-file\n", __FUNCTION__ );
236	return -1;
237	}
238
239	assert( (stdin_id == 0) , "stdin index must be 0" );
240
241	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
242	cycle = (uint32_t)hal_get_cycles();
243	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
244	printk("\n[%s] thread[%x,%x] / stdin open for process %x / cycle %d\n",
245	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
246	#endif
247
248	// create stdout pseudo file
249	error = vfs_open( process->vfs_root_xp,
250	tx_path,
251	process_xp,
252	O_WRONLY,
253	0, // FIXME chmod
254	&stdout_xp,
255	&stdout_id );
256	if( error )
257	{
258	printk("\n[ERROR] in %s : cannot open stdout pseudo-file\n", __FUNCTION__ );
259	return -1;
260	}
261
262	assert( (stdout_id == 1) , "stdout index must be 1" );
263
264	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
265	cycle = (uint32_t)hal_get_cycles();
266	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
267	printk("\n[%s] thread[%x,%x] / stdout open for process %x / cycle %d\n",
268	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
269	#endif
270
271	// create stderr pseudo file
272	error = vfs_open( process->vfs_root_xp,
273	tx_path,
274	process_xp,
275	O_WRONLY,
276	0, // FIXME chmod
277	&stderr_xp,
278	&stderr_id );
279	if( error )
280	{
281	printk("\n[ERROR] in %s : cannot open stderr pseudo-file\n", __FUNCTION__ );
282	return -1;
283	}
284
285	assert( (stderr_id == 2) , "stderr index must be 2" );
286
287	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
288	cycle = (uint32_t)hal_get_cycles();
289	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
290	printk("\n[%s] thread[%x,%x] / stderr open for process %x / cycle %d\n",
291	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
292	#endif
293
294	}
295	else // normal user process
296	{
297	// get extended pointer on stdin pseudo file in parent process
298	file_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy,
299	&parent_ptr->fd_array.array[0] ) );
300
301	// get extended pointer on parent process TXT chdev
302	chdev_xp = chdev_from_file( file_xp );
303
304	// get cluster and local pointer on chdev
305	chdev_cxy = GET_CXY( chdev_xp );
306	chdev_ptr = GET_PTR( chdev_xp );
307
308	// get parent process TXT terminal index
309	txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
310
311	// attach child process to parent process TXT terminal
312	process_txt_attach( process , txt_id );
313
314	// copy all open files from parent process fd_array to this process
315	process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ),
316	XPTR( parent_cxy , &parent_ptr->fd_array ) );
317	}
318
319	// initialize lock protecting CWD changes
320	remote_busylock_init( XPTR( local_cxy ,
321	&process->cwd_lock ), LOCK_PROCESS_CWD );
322
323	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
324	cycle = (uint32_t)hal_get_cycles();
325	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
326	printk("\n[%s] thread[%x,%x] / set fd_array for process %x / cycle %d\n",
327	__FUNCTION__, parent_pid, this->trdid, pid , cycle );
328	#endif
329
330	// reset children list root
331	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
332	process->children_nr = 0;
333	remote_queuelock_init( XPTR( local_cxy,
334	&process->children_lock ), LOCK_PROCESS_CHILDREN );
335
336	// reset semaphore / mutex / barrier / condvar list roots and lock
337	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
338	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
339	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
340	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
341	remote_queuelock_init( XPTR( local_cxy ,
342	&process->sync_lock ), LOCK_PROCESS_USERSYNC );
343
344	// reset open directories root and lock
345	xlist_root_init( XPTR( local_cxy , &process->dir_root ) );
346	remote_queuelock_init( XPTR( local_cxy ,
347	&process->dir_lock ), LOCK_PROCESS_DIR );
348
349	// register new process in the local cluster manager pref_tbl[]
350	lpid_t lpid = LPID_FROM_PID( pid );
351	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
352
353	// register new process descriptor in local cluster manager local_list
354	cluster_process_local_link( process );
355
356	// register new process descriptor in local cluster manager copies_list
357	cluster_process_copies_link( process );
358
359	// initialize th_tbl[] array and associated threads
360	uint32_t i;
361
362	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
363	{
364	process->th_tbl[i] = NULL;
365	}
366	process->th_nr = 0;
367	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
368
369	hal_fence();
370
371	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
372	cycle = (uint32_t)hal_get_cycles();
373	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
374	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
375	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
376	#endif
377
378	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
379	hal_vmm_display( parent_xp , false );
380	hal_vmm_display( XPTR( local_cxy , process ) , false );
381	#endif
382
383	return 0;
384
385	} // process_reference_init()
386
387	/////////////////////////////////////////////////////
388	error_t process_copy_init( process_t * local_process,
389	xptr_t reference_process_xp )
390	{
391	error_t error;
392	vmm_t * vmm;
393
394	// get reference process cluster and local pointer
395	cxy_t ref_cxy = GET_CXY( reference_process_xp );
396	process_t * ref_ptr = GET_PTR( reference_process_xp );
397
398	// get pointer on process vmm
399	vmm = &local_process->vmm;
400
401	// initialize PID, REF_XP, PARENT_XP, and STATE
402	local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) );
403	local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
404	local_process->ref_xp = reference_process_xp;
405	local_process->owner_xp = reference_process_xp;
406	local_process->term_state = 0;
407
408	#if DEBUG_PROCESS_COPY_INIT
409	thread_t * this = CURRENT_THREAD;
410	uint32_t cycle = (uint32_t)hal_get_cycles();
411	if( DEBUG_PROCESS_COPY_INIT < cycle )
412	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
413	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
414	#endif
415
416	// check user process
417	assert( (local_process->pid != 0), "LPID cannot be 0" );
418
419	// initialize VSL as empty
420	vmm->vsegs_nr = 0;
421	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
422
423	// create an empty GPT as required by the architecture
424	error = hal_gpt_create( &vmm->gpt );
425	if( error )
426	{
427	printk("\n[ERROR] in %s : cannot create empty GPT\n", __FUNCTION__ );
428	return -1;
429	}
430
431	// initialize GPT and VSL locks
432	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
433
434	// register kernel vsegs in VMM as required by the architecture
435	error = hal_vmm_kernel_update( local_process );
436	if( error )
437	{
438	printk("\n[ERROR] in %s : cannot register kernel vsegs in VMM\n", __FUNCTION__ );
439	return -1;
440	}
441
442	// create "args" and "envs" vsegs
443	// create "stacks" and "mmap" vsegs allocators
444	// initialize locks protecting GPT and VSL
445	error = vmm_user_init( local_process );
446	if( error )
447	{
448	printk("\n[ERROR] in %s : cannot register user vsegs in VMM\n", __FUNCTION__ );
449	return -1;
450	}
451
452	#if (DEBUG_PROCESS_COPY_INIT & 1)
453	cycle = (uint32_t)hal_get_cycles();
454	if( DEBUG_PROCESS_COPY_INIT < cycle )
455	printk("\n[%s] thread[%x,%x] initialized vmm for process %x / cycle %d\n",
456	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
457	#endif
458
459	// set process file descriptors array
460	process_fd_init( local_process );
461
462	// set vfs_root_xp / vfs_bin_xp / cwd_xp fields
463	local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
464	local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
465	local_process->cwd_xp = XPTR_NULL;
466
467	// reset children list root (not used in a process descriptor copy)
468	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
469	local_process->children_nr = 0;
470	remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ),
471	LOCK_PROCESS_CHILDREN );
472
473	// reset children_list (not used in a process descriptor copy)
474	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
475
476	// reset semaphores list root (not used in a process descriptor copy)
477	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
478	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
479	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
480	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
481
482	// initialize th_tbl[] array and associated fields
483	uint32_t i;
484	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
485	{
486	local_process->th_tbl[i] = NULL;
487	}
488	local_process->th_nr = 0;
489	rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL );
490
491	// register new process descriptor in local cluster manager local_list
492	cluster_process_local_link( local_process );
493
494	// register new process descriptor in owner cluster manager copies_list
495	cluster_process_copies_link( local_process );
496
497	hal_fence();
498
499	#if DEBUG_PROCESS_COPY_INIT
500	cycle = (uint32_t)hal_get_cycles();
501	if( DEBUG_PROCESS_COPY_INIT < cycle )
502	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
503	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
504	#endif
505
506	return 0;
507
508	} // end process_copy_init()
509
510	///////////////////////////////////////////
511	void process_destroy( process_t * process )
512	{
513	xptr_t parent_xp;
514	process_t * parent_ptr;
515	cxy_t parent_cxy;
516	xptr_t children_lock_xp;
517	xptr_t children_nr_xp;
518
519	pid_t pid = process->pid;
520
521	// check no more threads
522	assert( (process->th_nr == 0),
523	"process %x in cluster %x contains threads", pid , local_cxy );
524
525	#if DEBUG_PROCESS_DESTROY
526	thread_t * this = CURRENT_THREAD;
527	uint32_t cycle = (uint32_t)hal_get_cycles();
528	if( DEBUG_PROCESS_DESTROY < cycle )
529	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
530	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
531	#endif
532
533	// Destroy VMM
534	vmm_destroy( process );
535
536	#if (DEBUG_PROCESS_DESTROY & 1)
537	if( DEBUG_PROCESS_DESTROY < cycle )
538	printk("\n[%s] thread[%x,%x] destroyed VMM for process %x in cluster %x\n",
539	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
540	#endif
541
542	// remove process from local_list in local cluster manager
543	cluster_process_local_unlink( process );
544
545	#if (DEBUG_PROCESS_DESTROY & 1)
546	if( DEBUG_PROCESS_DESTROY < cycle )
547	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from local list\n",
548	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
549	#endif
550
551	// remove process from copies_list in owner cluster manager
552	cluster_process_copies_unlink( process );
553
554	#if (DEBUG_PROCESS_DESTROY & 1)
555	if( DEBUG_PROCESS_DESTROY < cycle )
556	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from copies list\n",
557	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
558	#endif
559
560	// when target process cluster is the owner cluster
561	// - remove process from TXT list and transfer ownership
562	// - remove process from children_list
563	// - release PID
564	if( CXY_FROM_PID( pid ) == local_cxy )
565	{
566	process_txt_detach( XPTR( local_cxy , process ) );
567
568	#if (DEBUG_PROCESS_DESTROY & 1)
569	if( DEBUG_PROCESS_DESTROY < cycle )
570	printk("\n[%s] thread[%x,%x] removed process %x from TXT list\n",
571	__FUNCTION__, this->process->pid, this->trdid, pid );
572	#endif
573
574	// get pointers on parent process
575	parent_xp = process->parent_xp;
576	parent_cxy = GET_CXY( parent_xp );
577	parent_ptr = GET_PTR( parent_xp );
578
579	// get extended pointer on children_lock in parent process
580	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
581	children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
582
583	// remove process from children_list
584	remote_queuelock_acquire( children_lock_xp );
585	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
586	hal_remote_atomic_add( children_nr_xp , -1 );
587	remote_queuelock_release( children_lock_xp );
588
589	#if (DEBUG_PROCESS_DESTROY & 1)
590	if( DEBUG_PROCESS_DESTROY < cycle )
591	printk("\n[%s] thread[%x,%x] removed process %x from parent process children list\n",
592	__FUNCTION__, this->process->pid, this->trdid, pid );
593	#endif
594
595	// release the process PID to cluster manager
596	cluster_pid_release( pid );
597
598	#if (DEBUG_PROCESS_DESTROY & 1)
599	if( DEBUG_PROCESS_DESTROY < cycle )
600	printk("\n[%s] thread[%x,%x] released process PID %x to pmgr in cluster %x\n",
601	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
602	#endif
603
604	}
605
606	// FIXME decrement the refcount on file pointer for vfs_bin_xp [AG]
607
608	// FIXME close all open files [AG]
609
610	// FIXME synchronize dirty files [AG]
611
612	// release memory allocated to process descriptor
613	process_free( process );
614
615	#if DEBUG_PROCESS_DESTROY
616	cycle = (uint32_t)hal_get_cycles();
617	if( DEBUG_PROCESS_DESTROY < cycle )
618	printk("\n[%s] thread[%x,%x] exit / process %x in cluster %x / cycle %d\n",
619	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
620	#endif
621
622	} // end process_destroy()
623
624	///////////////////////////////////////////////////////////////////
625	const char * process_action_str( process_sigactions_t action_type )
626	{
627	switch ( action_type )
628	{
629	case BLOCK_ALL_THREADS: return "BLOCK";
630	case UNBLOCK_ALL_THREADS: return "UNBLOCK";
631	case DELETE_ALL_THREADS: return "DELETE";
632	default: return "undefined";
633	}
634	}
635
636	////////////////////////////////////////
637	void process_sigaction( pid_t pid,
638	uint32_t type )
639	{
640	cxy_t owner_cxy; // owner cluster identifier
641	lpid_t lpid; // process index in owner cluster
642	cluster_t * cluster; // pointer on cluster manager
643	xptr_t root_xp; // extended pointer on root of copies
644	xptr_t lock_xp; // extended pointer on lock protecting copies
645	xptr_t iter_xp; // iterator on copies list
646	xptr_t process_xp; // extended pointer on process copy
647	cxy_t process_cxy; // process copy cluster identifier
648	process_t * process_ptr; // local pointer on process copy
649	reg_t save_sr; // for critical section
650	thread_t * client; // pointer on client thread
651	xptr_t client_xp; // extended pointer on client thread
652	process_t * local; // pointer on process copy in local cluster
653	uint32_t remote_nr; // number of remote process copies
654	rpc_desc_t rpc; // shared RPC descriptor
655	uint32_t responses; // shared RPC responses counter
656
657	client = CURRENT_THREAD;
658	client_xp = XPTR( local_cxy , client );
659	local = NULL;
660	remote_nr = 0;
661
662	// check calling thread can yield
663	thread_assert_can_yield( client , __FUNCTION__ );
664
665	#if DEBUG_PROCESS_SIGACTION
666	uint32_t cycle = (uint32_t)hal_get_cycles();
667	if( DEBUG_PROCESS_SIGACTION < cycle )
668	printk("\n[%s] thread[%x,%x] enter to %s process %x / cycle %d\n",
669	__FUNCTION__ , client->process->pid, client->trdid,
670	process_action_str( type ) , pid , cycle );
671	#endif
672
673	// get pointer on local cluster manager
674	cluster = LOCAL_CLUSTER;
675
676	// get owner cluster identifier and process lpid
677	owner_cxy = CXY_FROM_PID( pid );
678	lpid = LPID_FROM_PID( pid );
679
680	// get root of list of copies and lock from owner cluster
681	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
682	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
683
684	// check action type
685	assert( ((type == DELETE_ALL_THREADS ) \|\|
686	(type == BLOCK_ALL_THREADS ) \|\|
687	(type == UNBLOCK_ALL_THREADS )), "illegal action type" );
688
689	// This client thread send parallel RPCs to all remote clusters containing
690	// target process copies, wait all responses, and then handles directly
691	// the threads in local cluster, when required.
692	// The client thread allocates a - shared - RPC descriptor in the stack,
693	// because all parallel, non-blocking, server threads use the same input
694	// arguments, and use the shared RPC response field
695
696	// mask IRQs
697	hal_disable_irq( &save_sr);
698
699	// client thread blocks itself
700	thread_block( client_xp , THREAD_BLOCKED_RPC );
701
702	// initialize RPC responses counter
703	responses = 0;
704
705	// initialize shared RPC descriptor
706	// can be shared, because no out arguments
707	rpc.rsp = &responses;
708	rpc.blocking = false;
709	rpc.index = RPC_PROCESS_SIGACTION;
710	rpc.thread = client;
711	rpc.lid = client->core->lid;
712	rpc.args[0] = pid;
713	rpc.args[1] = type;
714
715	// take the lock protecting process copies
716	remote_queuelock_acquire( lock_xp );
717
718	// scan list of process copies
719	XLIST_FOREACH( root_xp , iter_xp )
720	{
721	// get extended pointers and cluster on process
722	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
723	process_cxy = GET_CXY( process_xp );
724	process_ptr = GET_PTR( process_xp );
725
726	if( process_cxy == local_cxy ) // process copy is local
727	{
728	local = process_ptr;
729	}
730	else // process copy is remote
731	{
732	// update number of remote process copies
733	remote_nr++;
734
735	// atomically increment RPC responses counter
736	hal_atomic_add( &responses , 1 );
737
738	#if DEBUG_PROCESS_SIGACTION
739	if( DEBUG_PROCESS_SIGACTION < cycle )
740	printk("\n[%s] thread[%x,%x] send RPC to cluster %x for process %x\n",
741	__FUNCTION__, client->process->pid, client->trdid, process_cxy, pid );
742	#endif
743	// call RPC in target cluster
744	rpc_send( process_cxy , &rpc );
745	}
746	} // end list of copies
747
748	// release the lock protecting process copies
749	remote_queuelock_release( lock_xp );
750
751	// restore IRQs
752	hal_restore_irq( save_sr);
753
754	// - if there is remote process copies, the client thread deschedules,
755	// (it will be unblocked by the last RPC server thread).
756	// - if there is no remote copies, the client thread unblock itself.
757	if( remote_nr )
758	{
759	sched_yield("blocked on rpc_process_sigaction");
760	}
761	else
762	{
763	thread_unblock( client_xp , THREAD_BLOCKED_RPC );
764	}
765
766	// handle the local process copy if required
767	if( local != NULL )
768	{
769
770	#if DEBUG_PROCESS_SIGACTION
771	if( DEBUG_PROCESS_SIGACTION < cycle )
772	printk("\n[%s] thread[%x,%x] handles local process %x in cluster %x\n",
773	__FUNCTION__, client->process->pid, client->trdid, pid , local_cxy );
774	#endif
775	if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp );
776	else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local );
777	else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local );
778	}
779
780	#if DEBUG_PROCESS_SIGACTION
781	cycle = (uint32_t)hal_get_cycles();
782	if( DEBUG_PROCESS_SIGACTION < cycle )
783	printk("\n[%s] thread[%x,%x] exit after %s process %x / cycle %d\n",
784	__FUNCTION__, client->process->pid, client->trdid,
785	process_action_str( type ), pid, cycle );
786	#endif
787
788	} // end process_sigaction()
789
790	/////////////////////////////////////////////////
791	void process_block_threads( process_t * process )
792	{
793	thread_t * target; // pointer on target thread
794	thread_t * this; // pointer on calling thread
795	uint32_t ltid; // index in process th_tbl[]
796	uint32_t count; // requests counter
797	volatile uint32_t ack_count; // acknowledges counter
798
799	// get calling thread pointer
800	this = CURRENT_THREAD;
801
802	#if DEBUG_PROCESS_SIGACTION
803	pid_t pid = process->pid;
804	uint32_t cycle = (uint32_t)hal_get_cycles();
805	if( DEBUG_PROCESS_SIGACTION < cycle )
806	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
807	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
808	#endif
809
810	// check target process is an user process
811	assert( (LPID_FROM_PID( process->pid ) != 0 ),
812	"process %x is not an user process\n", process->pid );
813
814	// get lock protecting process th_tbl[]
815	rwlock_rd_acquire( &process->th_lock );
816
817	// loop on target process local threads
818	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
819	// - if the calling thread and the target thread are not running on the same
820	// core, we ask the target scheduler to acknowlege the blocking
821	// to be sure that the target thread is not running.
822	// - if the calling thread and the target thread are running on the same core,
823	// we don't need confirmation from scheduler.
824
825	for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ )
826	{
827	target = process->th_tbl[ltid];
828
829	if( target != NULL ) // thread exist
830	{
831	count++;
832
833	// set the global blocked bit in target thread descriptor.
834	thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
835
836	if( this->core->lid != target->core->lid )
837	{
838	// increment responses counter
839	hal_atomic_add( (void*)&ack_count , 1 );
840
841	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
842	thread_set_req_ack( target , (uint32_t *)&ack_count );
843
844	// force scheduling on target thread
845	dev_pic_send_ipi( local_cxy , target->core->lid );
846	}
847	}
848	}
849
850	// release lock protecting process th_tbl[]
851	rwlock_rd_release( &process->th_lock );
852
853	// wait other threads acknowledges TODO this could be improved...
854	while( 1 )
855	{
856	// exit when all scheduler acknowledges received
857	if ( ack_count == 0 ) break;
858
859	// wait 1000 cycles before retry
860	hal_fixed_delay( 1000 );
861	}
862
863	#if DEBUG_PROCESS_SIGACTION
864	cycle = (uint32_t)hal_get_cycles();
865	if( DEBUG_PROCESS_SIGACTION < cycle )
866	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
867	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
868	#endif
869
870	} // end process_block_threads()
871
872	/////////////////////////////////////////////////
873	void process_delete_threads( process_t * process,
874	xptr_t client_xp )
875	{
876	thread_t * target; // local pointer on target thread
877	xptr_t target_xp; // extended pointer on target thread
878	cxy_t owner_cxy; // owner process cluster
879	uint32_t ltid; // index in process th_tbl
880	uint32_t count; // threads counter
881
882	// get calling thread pointer
883
884	// get target process owner cluster
885	owner_cxy = CXY_FROM_PID( process->pid );
886
887	#if DEBUG_PROCESS_SIGACTION
888	thread_t * this = CURRENT_THREAD;
889	uint32_t cycle = (uint32_t)hal_get_cycles();
890	if( DEBUG_PROCESS_SIGACTION < cycle )
891	printk("\n[%s] thread[%x,%x] enter for process %x n cluster %x / cycle %d\n",
892	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy, cycle );
893	#endif
894
895	// check target process is an user process
896	assert( (LPID_FROM_PID( process->pid ) != 0),
897	"process %x is not an user process\n", process->pid );
898
899	// get lock protecting process th_tbl[]
900	rwlock_wr_acquire( &process->th_lock );
901
902	// loop on target process local threads
903	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
904	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
905	{
906	target = process->th_tbl[ltid];
907
908	if( target != NULL ) // valid thread
909	{
910	count++;
911	target_xp = XPTR( local_cxy , target );
912
913	// main thread and client thread should not be deleted
914	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
915	(client_xp) != target_xp ) // not client thread
916	{
917	// mark target thread for delete and block it
918	thread_delete( target_xp , true ); // forced
919	}
920	}
921	}
922
923	// release lock protecting process th_tbl[]
924	rwlock_wr_release( &process->th_lock );
925
926	#if DEBUG_PROCESS_SIGACTION
927	cycle = (uint32_t)hal_get_cycles();
928	if( DEBUG_PROCESS_SIGACTION < cycle )
929	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
930	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy , cycle );
931	#endif
932
933	} // end process_delete_threads()
934
935	///////////////////////////////////////////////////
936	void process_unblock_threads( process_t * process )
937	{
938	thread_t * target; // pointer on target thead
939	uint32_t ltid; // index in process th_tbl
940	uint32_t count; // requests counter
941
942	#if DEBUG_PROCESS_SIGACTION
943	thread_t * this = CURRENT_THREAD;
944	pid_t pid = process->pid;
945	uint32_t cycle = (uint32_t)hal_get_cycles();
946	if( DEBUG_PROCESS_SIGACTION < cycle )
947	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
948	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
949	#endif
950
951	// check target process is an user process
952	assert( ( LPID_FROM_PID( process->pid ) != 0 ),
953	"process %x is not an user process\n", process->pid );
954
955	// get lock protecting process th_tbl[]
956	rwlock_rd_acquire( &process->th_lock );
957
958	// loop on process threads to unblock all threads
959	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
960	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
961	{
962	target = process->th_tbl[ltid];
963
964	if( target != NULL ) // thread found
965	{
966	count++;
967
968	// reset the global blocked bit in target thread descriptor.
969	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
970	}
971	}
972
973	// release lock protecting process th_tbl[]
974	rwlock_rd_release( &process->th_lock );
975
976	#if DEBUG_PROCESS_SIGACTION
977	cycle = (uint32_t)hal_get_cycles();
978	if( DEBUG_PROCESS_SIGACTION < cycle )
979	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
980	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
981	#endif
982
983	} // end process_unblock_threads()
984
985	///////////////////////////////////////////////
986	process_t * process_get_local_copy( pid_t pid )
987	{
988	error_t error;
989	process_t * process_ptr; // local pointer on process
990	xptr_t process_xp; // extended pointer on process
991
992	cluster_t * cluster = LOCAL_CLUSTER;
993
994	#if DEBUG_PROCESS_GET_LOCAL_COPY
995	thread_t * this = CURRENT_THREAD;
996	uint32_t cycle = (uint32_t)hal_get_cycles();
997	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
998	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
999	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
1000	#endif
1001
1002	// get lock protecting local list of processes
1003	remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1004
1005	// scan the local list of process descriptors to find the process
1006	xptr_t iter;
1007	bool_t found = false;
1008	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
1009	{
1010	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
1011	process_ptr = GET_PTR( process_xp );
1012	if( process_ptr->pid == pid )
1013	{
1014	found = true;
1015	break;
1016	}
1017	}
1018
1019	// release lock protecting local list of processes
1020	remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1021
1022	// allocate memory for a new local process descriptor
1023	// and initialise it from reference cluster if not found
1024	if( !found )
1025	{
1026	// get extended pointer on reference process descriptor
1027	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
1028
1029	assert( (ref_xp != XPTR_NULL) , "illegal pid\n" );
1030
1031	// allocate memory for local process descriptor
1032	process_ptr = process_alloc();
1033
1034	if( process_ptr == NULL ) return NULL;
1035
1036	// initialize local process descriptor copy
1037	error = process_copy_init( process_ptr , ref_xp );
1038
1039	if( error ) return NULL;
1040	}
1041
1042	#if DEBUG_PROCESS_GET_LOCAL_COPY
1043	cycle = (uint32_t)hal_get_cycles();
1044	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
1045	printk("\n[%s] thread[%x,%x] exit in cluster %x / process %x / cycle %d\n",
1046	__FUNCTION__, this->process->pid, this->trdid, local_cxy, process_ptr, cycle );
1047	#endif
1048
1049	return process_ptr;
1050
1051	} // end process_get_local_copy()
1052
1053	////////////////////////////////////////////
1054	pid_t process_get_ppid( xptr_t process_xp )
1055	{
1056	cxy_t process_cxy;
1057	process_t * process_ptr;
1058	xptr_t parent_xp;
1059	cxy_t parent_cxy;
1060	process_t * parent_ptr;
1061
1062	// get process cluster and local pointer
1063	process_cxy = GET_CXY( process_xp );
1064	process_ptr = GET_PTR( process_xp );
1065
1066	// get pointers on parent process
1067	parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
1068	parent_cxy = GET_CXY( parent_xp );
1069	parent_ptr = GET_PTR( parent_xp );
1070
1071	return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
1072	}
1073
1074	//////////////////////////////////////////////////////////////////////////////////////////
1075	// File descriptor array related functions
1076	//////////////////////////////////////////////////////////////////////////////////////////
1077
1078	///////////////////////////////////////////
1079	char * process_fd_type_str( uint32_t type )
1080	{
1081	switch( type )
1082	{
1083	case INODE_TYPE_FILE : return "FILE";
1084	case INODE_TYPE_DIR : return "DIR";
1085	case INODE_TYPE_FIFO : return "FIFO";
1086	case INODE_TYPE_PIPE : return "PIPE";
1087	case INODE_TYPE_SOCK : return "SOCK";
1088	case INODE_TYPE_DEV : return "DEV";
1089	case INODE_TYPE_BLK : return "BLK";
1090	case INODE_TYPE_SYML : return "SYML";
1091
1092	default : return "undefined";
1093	}
1094	}
1095
1096	///////////////////////////////////////////
1097	void process_fd_init( process_t * process )
1098	{
1099	uint32_t fd;
1100
1101	// initialize lock
1102	remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY );
1103
1104	// initialize number of open files
1105	process->fd_array.max = 0;
1106
1107	// initialize array
1108	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1109	{
1110	process->fd_array.array[fd] = XPTR_NULL;
1111	}
1112	}
1113
1114	////////////////////////////////////////////////////
1115	error_t process_fd_register( xptr_t process_xp,
1116	xptr_t file_xp,
1117	uint32_t * fdid )
1118	{
1119	bool_t found;
1120	uint32_t id;
1121	uint32_t max; // current value of max non-free slot index
1122	xptr_t entry_xp; // current value of one fd_array entry
1123	xptr_t lock_xp; // extended pointer on lock protecting fd_array
1124	xptr_t max_xp; // extended pointer on max field in fd_array
1125
1126	// get target process cluster and local pointer
1127	process_t * process_ptr = GET_PTR( process_xp );
1128	cxy_t process_cxy = GET_CXY( process_xp );
1129
1130	// check target process is owner process
1131	assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) ) ),
1132	"process must be owner process\n" );
1133
1134	#if DEBUG_PROCESS_FD_REGISTER
1135	thread_t * this = CURRENT_THREAD;
1136	uint32_t cycle = (uint32_t)hal_get_cycles();
1137	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1138	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1139	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
1140	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1141	#endif
1142
1143	// build extended pointers on lock & max
1144	lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1145	max_xp = XPTR( process_cxy , &process_ptr->fd_array.max );
1146
1147	// take lock protecting reference fd_array
1148	remote_queuelock_acquire( lock_xp );
1149
1150	found = false;
1151
1152	// get current value of max_fdid
1153	max = hal_remote_l32( max_xp );
1154
1155	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
1156	{
1157	// get fd_array entry
1158	entry_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) );
1159
1160	if ( entry_xp == XPTR_NULL )
1161	{
1162	// update fd_array
1163	hal_remote_s64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) , file_xp );
1164
1165	// update max when required
1166	if( id > max ) hal_remote_s32( max_xp , id );
1167
1168	// increase file refcount
1169	vfs_file_count_up( file_xp );
1170
1171	// exit loop
1172	*fdid = id;
1173	found = true;
1174	break;
1175	}
1176	}
1177
1178	// release lock protecting fd_array
1179	remote_queuelock_release( lock_xp );
1180
1181	#if DEBUG_PROCESS_FD_REGISTER
1182	cycle = (uint32_t)hal_get_cycles();
1183	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1184	printk("\n[%s] thread[%x,%x] exit for process %x / fdid %d / cycle %d\n",
1185	__FUNCTION__, this->process->pid, this->trdid, pid, id, cycle );
1186	#endif
1187
1188	if ( !found ) return -1;
1189	else return 0;
1190
1191	} // end process_fd_register()
1192
1193	/////////////////////////////////////////////
1194	void process_fd_remove( xptr_t process_xp,
1195	uint32_t fdid )
1196	{
1197	pid_t pid; // target process PID
1198	lpid_t lpid; // target process LPID
1199	xptr_t file_xp; // extended pointer on file descriptor
1200	xptr_t iter_xp; // iterator for list of process copies
1201	xptr_t copy_xp; // extended pointer on process copy
1202	process_t * copy_ptr; // local pointer on process copy
1203	cxy_t copy_cxy; // process copy cluster identifier
1204
1205	// get target process cluster and local pointer
1206	process_t * process_ptr = GET_PTR( process_xp );
1207	cxy_t process_cxy = GET_CXY( process_xp );
1208
1209	// check target process is owner process
1210	assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) ) ),
1211	"process must be owner process\n" );
1212
1213	// get target process pid and lpid
1214	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1215	lpid = LPID_FROM_PID( pid );
1216
1217	#if DEBUG_PROCESS_FD_REMOVE
1218	uint32_t cycle = (uint32_t)hal_get_cycles();
1219	thread_t * this = CURRENT_THREAD;
1220	if( DEBUG_PROCESS_FD_REMOVE < cycle )
1221	printk("\n[%s] thread[%x,%x] enter for fdid %d in process %x / cycle %d\n",
1222	__FUNCTION__, this->process->pid, this->trdid, fdid, pid, cycle );
1223	#endif
1224
1225	// get extended pointer on file descriptor
1226	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1227
1228	// build extended pointers on list_of_copies root and lock (in owner cluster)
1229	xptr_t copies_root_xp = XPTR( process_cxy , &LOCAL_CLUSTER->pmgr.copies_root[lpid] );
1230	xptr_t copies_lock_xp = XPTR( process_cxy , &LOCAL_CLUSTER->pmgr.copies_lock[lpid] );
1231
1232	// build extended pointer on fd_array lock and max
1233	xptr_t fd_lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1234	xptr_t fd_max_xp = XPTR( process_cxy , &process_ptr->fd_array.max );
1235
1236	// take lock protecting fd_array
1237	remote_queuelock_acquire( fd_lock_xp );
1238
1239	// take the lock protecting the list of copies
1240	remote_queuelock_acquire( copies_lock_xp );
1241
1242	// get max value
1243	uint32_t max = hal_remote_l32( fd_max_xp );
1244
1245	// loop on list of process copies
1246	XLIST_FOREACH( copies_root_xp , iter_xp )
1247	{
1248	// get pointers on process copy
1249	copy_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
1250	copy_ptr = GET_PTR( copy_xp );
1251	copy_cxy = GET_CXY( copy_xp );
1252
1253	// release the fd_array entry in process copy
1254	hal_remote_s64( XPTR( copy_cxy , &copy_ptr->fd_array.array[fdid] ), XPTR_NULL );
1255
1256	// decrease file refcount
1257	vfs_file_count_down( file_xp );
1258	}
1259
1260	// update max when required
1261	if( fdid == max ) hal_remote_s32( fd_max_xp , max-1 );
1262
1263	// release the lock protecting reference fd_array
1264	remote_queuelock_release( fd_lock_xp );
1265
1266	// release the lock protecting the list of copies
1267	remote_queuelock_release( copies_lock_xp );
1268
1269	#if DEBUG_PROCESS_FD_REMOVE
1270	cycle = (uint32_t)hal_get_cycles();
1271	if( DEBUG_PROCESS_FD_REMOVE < cycle )
1272	printk("\n[%s] thread[%x,%x] exit for fdid %d in process %x / cycle %d\n",
1273	__FUNCTION__, this->process->pid, this->trdid, fdid, pid, cycle );
1274	#endif
1275
1276	} // end process_fd_remove()
1277
1278	//////////////////////////////////////////////
1279	void process_fd_clean_all( xptr_t process_xp )
1280	{
1281	uint32_t id;
1282	xptr_t file_xp; // one fd_array entry
1283	xptr_t lock_xp; // extendad pointer on lock protecting fd_array
1284	uint32_t max; // number of registered files
1285	error_t error;
1286
1287	// get process cluster, local pointer and PID
1288	process_t * process_ptr = GET_PTR( process_xp );
1289	cxy_t process_cxy = GET_CXY( process_xp );
1290	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1291
1292	// check target process is owner process
1293	assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp )) ),
1294	"process must be owner process\n" );
1295
1296	#if DEBUG_PROCESS_FD_CLEAN_ALL
1297	thread_t * this = CURRENT_THREAD;
1298	uint32_t cycle = (uint32_t)hal_get_cycles();
1299	if( DEBUG_PROCESS_FD_CLEAN_ALL < cycle )
1300	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
1301	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1302
1303	process_fd_display( process_xp );
1304	#endif
1305
1306	// build extended pointer on lock protecting the fd_array
1307	lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1308
1309	// get max index for fd_array
1310	max = hal_remote_l32( XPTR( process_cxy , &process_ptr->fd_array.max ));
1311
1312	// take lock protecting fd_array
1313	remote_queuelock_acquire( lock_xp );
1314
1315	for ( id = 0; id <= max ; id++ )
1316	{
1317	// get fd_array entry
1318	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) );
1319
1320	if ( file_xp != XPTR_NULL )
1321	{
1322	// close the file or socket
1323	error = sys_close( id );
1324
1325	if( error )
1326	printk("/n[ERROR] in %s : cannot close the file %d for process %x\n",
1327	__FUNCTION__, id, pid );
1328	}
1329	}
1330
1331	// release lock protecting fd_array
1332	remote_queuelock_release( lock_xp );
1333
1334	#if DEBUG_PROCESS_FD_CLEAN_ALL
1335	cycle = (uint32_t)hal_get_cycles();
1336	if( DEBUG_PROCESS_FD_CLEAN_ALL < cycle )
1337	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
1338	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1339	#endif
1340
1341	} // end process_fd_clean_all()
1342
1343	//////////////////////////////////////////////////////////////
1344	xptr_t process_fd_get_xptr_from_owner( xptr_t process_xp,
1345	uint32_t fdid )
1346	{
1347	cxy_t process_cxy = GET_CXY( process_xp );
1348	process_t * process_ptr = GET_PTR( process_xp );
1349
1350	assert( (hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp )) == process_xp),
1351	"process_xp argument must be the owner process" );
1352
1353	// access owner process fd_array
1354	return hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1355
1356	} // end process_fd_get_xptr_from_owner()
1357
1358	///////////////////////////////////////////////////////////
1359	xptr_t process_fd_get_xptr_from_local( process_t * process,
1360	uint32_t fdid )
1361	{
1362	xptr_t file_xp;
1363	xptr_t lock_xp;
1364
1365	// access local copy of process descriptor
1366	file_xp = process->fd_array.array[fdid];
1367
1368	if( file_xp == XPTR_NULL )
1369	{
1370	// get owner process cluster and local pointer
1371	xptr_t owner_xp = process->owner_xp;
1372	cxy_t owner_cxy = GET_CXY( owner_xp );
1373	process_t * owner_ptr = GET_PTR( owner_xp );
1374
1375	// build extended pointer on lock protecting fd_array
1376	lock_xp = XPTR( owner_cxy , &owner_ptr->fd_array.lock );
1377
1378	// take lock protecting fd_array
1379	remote_queuelock_acquire( lock_xp );
1380
1381	// access reference process descriptor
1382	file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[fdid] ) );
1383
1384	if( file_xp != XPTR_NULL )
1385	{
1386	// update local fd_array
1387	process->fd_array.array[fdid] = file_xp;
1388
1389	// increase file refcount
1390	vfs_file_count_up( file_xp );
1391	}
1392
1393	// release lock protecting fd_array
1394	remote_queuelock_release( lock_xp );
1395	}
1396
1397	return file_xp;
1398
1399	} // end process_fd_get_xptr_from_local()
1400
1401	///////////////////////////////////////////
1402	void process_fd_remote_copy( xptr_t dst_xp,
1403	xptr_t src_xp )
1404	{
1405	uint32_t fd;
1406	xptr_t entry;
1407
1408	// get cluster and local pointer for src fd_array
1409	cxy_t src_cxy = GET_CXY( src_xp );
1410	fd_array_t * src_ptr = GET_PTR( src_xp );
1411
1412	// get cluster and local pointer for dst fd_array
1413	cxy_t dst_cxy = GET_CXY( dst_xp );
1414	fd_array_t * dst_ptr = GET_PTR( dst_xp );
1415
1416	// get the remote lock protecting the src fd_array
1417	remote_queuelock_acquire( XPTR( src_cxy , &src_ptr->lock ) );
1418
1419	// loop on all fd_array entries
1420	for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1421	{
1422	entry = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->array[fd] ) );
1423
1424	if( entry != XPTR_NULL )
1425	{
1426	// increment file descriptor refcount
1427	vfs_file_count_up( entry );
1428
1429	// copy entry in destination process fd_array
1430	hal_remote_s64( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry );
1431	}
1432	}
1433
1434	// release lock on source process fd_array
1435	remote_queuelock_release( XPTR( src_cxy , &src_ptr->lock ) );
1436
1437	} // end process_fd_remote_copy()
1438
1439
1440	////////////////////////////////////
1441	bool_t process_fd_array_full( void )
1442	{
1443	// get extended pointer on owner process
1444	xptr_t owner_xp = CURRENT_THREAD->process->owner_xp;
1445
1446	// get owner process cluster and local pointer
1447	process_t * owner_ptr = GET_PTR( owner_xp );
1448	cxy_t owner_cxy = GET_CXY( owner_xp );
1449
1450	// get number of open file descriptors from fd_array
1451	uint32_t max = hal_remote_l32( XPTR( owner_cxy , &owner_ptr->fd_array.max ));
1452
1453	return ( max == CONFIG_PROCESS_FILE_MAX_NR - 1 );
1454	}
1455
1456	////////////////////////////////////////////
1457	void process_fd_display( xptr_t process_xp )
1458	{
1459	uint32_t fdid;
1460	xptr_t file_xp;
1461	vfs_file_t * file_ptr;
1462	cxy_t file_cxy;
1463	uint32_t file_type;
1464	xptr_t inode_xp;
1465	vfs_inode_t * inode_ptr;
1466
1467	char name[CONFIG_VFS_MAX_NAME_LENGTH];
1468
1469	// get process cluster and local pointer
1470	process_t * process_ptr = GET_PTR( process_xp );
1471	cxy_t process_cxy = GET_CXY( process_xp );
1472
1473	// get process PID
1474	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ));
1475
1476	// get pointers on owner process descriptor
1477	xptr_t owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ));
1478	process_t * owner_ptr = GET_PTR( owner_xp );
1479	cxy_t owner_cxy = GET_CXY( owner_xp );
1480
1481	// get max fdid from owner process descriptor
1482	uint32_t max = hal_remote_l32( XPTR( owner_cxy , &owner_ptr->fd_array.max ));
1483
1484	printk("\n*** fd_array for pid %x in cluster %x / max %d ***\n",
1485	pid, process_cxy, max );
1486
1487	for( fdid = 0 ; fdid <= max ; fdid++ )
1488	{
1489	// get pointers on file descriptor
1490	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1491	file_ptr = GET_PTR( file_xp );
1492	file_cxy = GET_CXY( file_xp );
1493
1494	if( file_xp != XPTR_NULL )
1495	{
1496	// get file type
1497	file_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ));
1498
1499	// get file name for a true file
1500	if( file_type == INODE_TYPE_FILE )
1501	{
1502	// get inode pointers
1503	inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ));
1504	inode_xp = XPTR( file_cxy , inode_ptr );
1505
1506	// get file name
1507	vfs_inode_get_name( inode_xp , name );
1508
1509	// display relevant file decriptor info
1510	printk(" - %d : type %s (%s)\n",
1511	fdid , process_fd_type_str(file_type), name );
1512	}
1513	else
1514	{
1515	// display relevant file decriptor info
1516	printk(" - %d : type %s\n",
1517	fdid , process_fd_type_str(file_type) );
1518	}
1519	}
1520	else
1521	{
1522	// display relevant file decriptor info
1523	printk(" - %d : empty slot\n",
1524	fdid );
1525	}
1526	}
1527	} // end process_fd_display()
1528
1529	////////////////////////////////////////////////////////////////////////////////////
1530	// Thread related functions
1531	////////////////////////////////////////////////////////////////////////////////////
1532
1533	/////////////////////////////////////////////////////
1534	error_t process_register_thread( process_t * process,
1535	thread_t * thread,
1536	trdid_t * trdid )
1537	{
1538	ltid_t ltid;
1539	bool_t found = false;
1540
1541	// check arguments
1542	assert( (process != NULL) , "process argument is NULL" );
1543	assert( (thread != NULL) , "thread argument is NULL" );
1544
1545	// get the lock protecting th_tbl for all threads
1546	// but the idle thread executing kernel_init (cannot yield)
1547	if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock );
1548
1549	// scan th_tbl
1550	for( ltid = 0 ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ )
1551	{
1552	if( process->th_tbl[ltid] == NULL )
1553	{
1554	found = true;
1555	break;
1556	}
1557	}
1558
1559	if( found )
1560	{
1561	// register thread in th_tbl[]
1562	process->th_tbl[ltid] = thread;
1563	process->th_nr++;
1564
1565	// returns trdid
1566	*trdid = TRDID( local_cxy , ltid );
1567	}
1568
1569	// release the lock protecting th_tbl
1570	if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock );
1571
1572	return (found) ? 0 : 0xFFFFFFFF;
1573
1574	} // end process_register_thread()
1575
1576	///////////////////////////////////////////////////
1577	uint32_t process_remove_thread( thread_t * thread )
1578	{
1579	uint32_t count; // number of threads in local process descriptor
1580
1581	// check thread
1582	assert( (thread != NULL) , "thread argument is NULL" );
1583
1584	process_t * process = thread->process;
1585
1586	// get thread local index
1587	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
1588
1589	// get the lock protecting th_tbl[]
1590	rwlock_wr_acquire( &process->th_lock );
1591
1592	// get number of threads
1593	count = process->th_nr;
1594
1595	// check th_nr value
1596	assert( (count > 0) , "process th_nr cannot be 0" );
1597
1598	// remove thread from th_tbl[]
1599	process->th_tbl[ltid] = NULL;
1600	process->th_nr = count-1;
1601
1602	// release lock protecting th_tbl
1603	rwlock_wr_release( &process->th_lock );
1604
1605	return count;
1606
1607	} // end process_remove_thread()
1608
1609	/////////////////////////////////////////////////////////
1610	error_t process_make_fork( xptr_t parent_process_xp,
1611	xptr_t parent_thread_xp,
1612	pid_t * child_pid,
1613	thread_t ** child_thread )
1614	{
1615	process_t * process; // local pointer on child process descriptor
1616	thread_t * thread; // local pointer on child thread descriptor
1617	pid_t new_pid; // process identifier for child process
1618	pid_t parent_pid; // process identifier for parent process
1619	xptr_t ref_xp; // extended pointer on reference process
1620	xptr_t vfs_bin_xp; // extended pointer on .elf file
1621	error_t error;
1622
1623	// get cluster and local pointer for parent process
1624	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
1625	process_t * parent_process_ptr = GET_PTR( parent_process_xp );
1626
1627	// get parent process PID and extended pointer on .elf file
1628	parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid));
1629	vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
1630
1631	// get extended pointer on reference process
1632	ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
1633
1634	// check parent process is the reference process
1635	assert( (parent_process_xp == ref_xp ) ,
1636	"parent process must be the reference process" );
1637
1638	#if DEBUG_PROCESS_MAKE_FORK
1639	uint32_t cycle;
1640	thread_t * this = CURRENT_THREAD;
1641	trdid_t trdid = this->trdid;
1642	pid_t pid = this->process->pid;
1643	#endif
1644
1645	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1646	cycle = (uint32_t)hal_get_cycles();
1647	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1648	printk("\n[%s] thread[%x,%x] enter / cluster %x / cycle %d\n",
1649	__FUNCTION__, pid, trdid, local_cxy, cycle );
1650	#endif
1651
1652	// allocate a process descriptor
1653	process = process_alloc();
1654
1655	if( process == NULL )
1656	{
1657	printk("\n[ERROR] in %s : cannot get process in cluster %x\n",
1658	__FUNCTION__, local_cxy );
1659	return -1;
1660	}
1661
1662	// allocate a child PID from local cluster
1663	error = cluster_pid_alloc( process , &new_pid );
1664	if( error )
1665	{
1666	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
1667	__FUNCTION__, local_cxy );
1668	process_free( process );
1669	return -1;
1670	}
1671
1672	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1673	cycle = (uint32_t)hal_get_cycles();
1674	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1675	printk("\n[%s] thread[%x,%x] allocated child_process %x / cycle %d\n",
1676	__FUNCTION__, pid, trdid, new_pid, cycle );
1677	#endif
1678
1679	// initializes child process descriptor from parent process descriptor
1680	error = process_reference_init( process,
1681	new_pid,
1682	parent_process_xp );
1683	if( error )
1684	{
1685	printk("\n[ERROR] in %s : cannot initialize child process in cluster %x\n",
1686	__FUNCTION__, local_cxy );
1687	process_free( process );
1688	return -1;
1689	}
1690
1691	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1692	cycle = (uint32_t)hal_get_cycles();
1693	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1694	printk("\n[%s] thread[%x,%x] initialized child_process %x / cycle %d\n",
1695	__FUNCTION__, pid, trdid, new_pid, cycle );
1696	#endif
1697
1698	// copy VMM from parent descriptor to child descriptor
1699	error = vmm_fork_copy( process,
1700	parent_process_xp );
1701	if( error )
1702	{
1703	printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n",
1704	__FUNCTION__, local_cxy );
1705	process_free( process );
1706	cluster_pid_release( new_pid );
1707	return -1;
1708	}
1709
1710	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1711	cycle = (uint32_t)hal_get_cycles();
1712	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1713	printk("\n[%s] thread[%x,%x] copied VMM from parent to child / cycle %d\n",
1714	__FUNCTION__, pid, trdid, cycle );
1715	hal_vmm_display( XPTR( local_cxy , process ) , true );
1716	#endif
1717
1718	// if parent_process is INIT, or if parent_process is the TXT owner,
1719	// the child_process becomes the owner of its TXT terminal
1720	if( (parent_pid == 1) \|\| process_txt_is_owner( parent_process_xp ) )
1721	{
1722	process_txt_set_ownership( XPTR( local_cxy , process ) );
1723
1724	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1725	cycle = (uint32_t)hal_get_cycles();
1726	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1727	printk("\n[%s] thread[%x,%x] / child_process %x takes TXT ownership / cycle %d\n",
1728	__FUNCTION__ , pid, trdid, new_pid, cycle );
1729	#endif
1730
1731	}
1732
1733	// update extended pointer on .elf file
1734	process->vfs_bin_xp = vfs_bin_xp;
1735
1736	// create child thread descriptor from parent thread descriptor
1737	error = thread_user_fork( parent_thread_xp,
1738	process,
1739	&thread );
1740	if( error )
1741	{
1742	printk("\n[ERROR] in %s : cannot create thread in cluster %x\n",
1743	__FUNCTION__, local_cxy );
1744	process_free( process );
1745	cluster_pid_release( new_pid );
1746	return -1;
1747	}
1748
1749	// check main thread LTID
1750	assert( (LTID_FROM_TRDID(thread->trdid) == 0) ,
1751	"main thread must have LTID == 0" );
1752
1753	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1754	cycle = (uint32_t)hal_get_cycles();
1755	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1756	printk("\n[%s] thread[%x,%x] created main thread %x / cycle %d\n",
1757	__FUNCTION__, pid, trdid, thread, cycle );
1758	#endif
1759
1760	// set COW flag in DATA, ANON, REMOTE vsegs in parent process VMM
1761	// this includes all parent process copies in all clusters
1762	if( parent_process_cxy == local_cxy ) // reference is local
1763	{
1764	vmm_set_cow( parent_process_ptr );
1765	}
1766	else // reference is remote
1767	{
1768	rpc_vmm_set_cow_client( parent_process_cxy,
1769	parent_process_ptr );
1770	}
1771
1772	// set COW flag in DATA, ANON, REMOTE vsegs for child process VMM
1773	vmm_set_cow( process );
1774
1775	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1776	cycle = (uint32_t)hal_get_cycles();
1777	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1778	printk("\n[%s] thread[%x,%x] set COW in DATA / ANON / REMOTE for parent and child / cycle %d\n",
1779	__FUNCTION__, pid, trdid, cycle );
1780	#endif
1781
1782	// get extended pointers on parent children_root, children_lock and children_nr
1783	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
1784	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
1785	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
1786
1787	// register process in parent children list
1788	remote_queuelock_acquire( children_lock_xp );
1789	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1790	hal_remote_atomic_add( children_nr_xp , 1 );
1791	remote_queuelock_release( children_lock_xp );
1792
1793	// return success
1794	*child_thread = thread;
1795	*child_pid = new_pid;
1796
1797	#if DEBUG_PROCESS_MAKE_FORK
1798	cycle = (uint32_t)hal_get_cycles();
1799	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1800	printk("\n[%s] thread[%x,%x] exit / created process %x / cycle %d\n",
1801	__FUNCTION__, pid, trdid, new_pid, cycle );
1802	#endif
1803
1804	return 0;
1805
1806	} // end process_make_fork()
1807
1808	/////////////////////////////////////////////////////
1809	error_t process_make_exec( exec_info_t * exec_info )
1810	{
1811	thread_t * thread; // local pointer on this thread
1812	process_t * process; // local pointer on this process
1813	pid_t pid; // this process identifier
1814	xptr_t ref_xp; // reference process for this process
1815	error_t error; // value returned by called functions
1816	char * path; // path to .elf file
1817	xptr_t file_xp; // extended pointer on .elf file descriptor
1818	uint32_t file_id; // file index in fd_array
1819	uint32_t args_nr; // number of main thread arguments
1820	char ** args_pointers; // array of pointers on main thread arguments
1821
1822	// get calling thread, process, pid and ref_xp
1823	thread = CURRENT_THREAD;
1824	process = thread->process;
1825	pid = process->pid;
1826	ref_xp = process->ref_xp;
1827
1828	// get relevant infos from exec_info
1829	path = exec_info->path;
1830	args_nr = exec_info->args_nr;
1831	args_pointers = exec_info->args_pointers;
1832
1833	#if DEBUG_PROCESS_MAKE_EXEC
1834	uint32_t cycle = (uint32_t)hal_get_cycles();
1835	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1836	printk("\n[%s] thread[%x,%x] enters for %s / cycle %d\n",
1837	__FUNCTION__, pid, thread->trdid, path, cycle );
1838	#endif
1839
1840	// open the file identified by <path>
1841	file_xp = XPTR_NULL;
1842	file_id = 0xFFFFFFFF;
1843	error = vfs_open( process->vfs_root_xp,
1844	path,
1845	ref_xp,
1846	O_RDONLY,
1847	0,
1848	&file_xp,
1849	&file_id );
1850	if( error )
1851	{
1852	printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path );
1853	return -1;
1854	}
1855
1856	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1857	cycle = (uint32_t)hal_get_cycles();
1858	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1859	printk("\n[%s] thread[%x,%x] opened file <%s> / cycle %d\n",
1860	__FUNCTION__, pid, thread->trdid, path, cycle );
1861	#endif
1862
1863	// delete all threads other than this main thread in all clusters
1864	process_sigaction( pid , DELETE_ALL_THREADS );
1865
1866	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1867	cycle = (uint32_t)hal_get_cycles();
1868	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1869	printk("\n[%s] thread[%x,%x] deleted existing threads / cycle %d\n",
1870	__FUNCTION__, pid, thread->trdid, cycle );
1871	#endif
1872
1873	// reset calling process VMM
1874	vmm_user_reset( process );
1875
1876	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1877	cycle = (uint32_t)hal_get_cycles();
1878	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1879	printk("\n[%s] thread[%x,%x] completed VMM reset / cycle %d\n",
1880	__FUNCTION__, pid, thread->trdid, cycle );
1881	#endif
1882
1883	// re-initialize the VMM (args/envs vsegs registration)
1884	error = vmm_user_init( process );
1885	if( error )
1886	{
1887	printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path );
1888	vfs_close( file_xp , file_id );
1889	// FIXME restore old process VMM [AG]
1890	return -1;
1891	}
1892
1893	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1894	cycle = (uint32_t)hal_get_cycles();
1895	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1896	printk("\n[%s] thread[%x,%x] registered args/envs vsegs / cycle %d\n",
1897	__FUNCTION__, pid, thread->trdid, cycle );
1898	#endif
1899
1900	// register code & data vsegs as well as entry-point in process VMM,
1901	// and register extended pointer on .elf file in process descriptor
1902	error = elf_load_process( file_xp , process );
1903	if( error )
1904	{
1905	printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path );
1906	vfs_close( file_xp , file_id );
1907	// FIXME restore old process VMM [AG]
1908	return -1;
1909	}
1910
1911	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1912	cycle = (uint32_t)hal_get_cycles();
1913	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1914	printk("\n[%s] thread[%x,%x] registered code/data vsegs / cycle %d\n",
1915	__FUNCTION__, pid, thread->trdid, cycle );
1916	#endif
1917
1918	// update the existing main thread descriptor... and jump to user code
1919	error = thread_user_exec( (void *)process->vmm.entry_point,
1920	args_nr,
1921	args_pointers );
1922	if( error )
1923	{
1924	printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path );
1925	vfs_close( file_xp , file_id );
1926	// FIXME restore old process VMM
1927	return -1;
1928	}
1929
1930	assert( false, "we should not execute this code");
1931
1932	return 0;
1933
1934	} // end process_make_exec()
1935
1936
1937	////////////////////////////////////////////////
1938	void process_zero_create( process_t * process,
1939	boot_info_t * info )
1940	{
1941	error_t error;
1942	pid_t pid;
1943
1944	#if DEBUG_PROCESS_ZERO_CREATE
1945	uint32_t cycle = (uint32_t)hal_get_cycles();
1946	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1947	printk("\n[%s] enter / cluster %x / cycle %d\n",
1948	__FUNCTION__, local_cxy, cycle );
1949	#endif
1950
1951	// get pointer on VMM
1952	vmm_t * vmm = &process->vmm;
1953
1954	// get PID from local cluster manager for this kernel process
1955	error = cluster_pid_alloc( process , &pid );
1956
1957	if( error \|\| (LPID_FROM_PID( pid ) != 0) )
1958	{
1959	printk("\n[PANIC] in %s : cannot get valid PID in cluster %x / PID = %x\n",
1960	__FUNCTION__ , local_cxy, pid );
1961	hal_core_sleep();
1962	}
1963
1964	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
1965	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1966	printk("\n[%s] allocated pid %x in cluster %x\n", __FUNCTION__, pid, local_cxy );
1967	#endif
1968
1969	// initialize PID, REF_XP, PARENT_XP, and STATE
1970	// the kernel process_zero is its own parent_process,
1971	// reference_process, and owner_process, and cannot be killed...
1972	process->pid = pid;
1973	process->ref_xp = XPTR( local_cxy , process );
1974	process->owner_xp = XPTR( local_cxy , process );
1975	process->parent_xp = XPTR( local_cxy , process );
1976	process->term_state = 0;
1977
1978	// initialize VSL as empty
1979	vmm->vsegs_nr = 0;
1980	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
1981
1982	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
1983	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1984	printk("\n[%s] initialized VSL empty in cluster %x\n", __FUNCTION__, local_cxy );
1985	#endif
1986
1987	// initialize GPT as empty
1988	error = hal_gpt_create( &vmm->gpt );
1989
1990	if( error )
1991	{
1992	printk("\n[PANIC] in %s : cannot create empty GPT\n", __FUNCTION__ );
1993	hal_core_sleep();
1994	}
1995
1996	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
1997	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1998	printk("\n[%s] initialized GPT empty in cluster %x\n", __FUNCTION__, local_cxy );
1999	#endif
2000
2001	// initialize VSL and GPT locks
2002	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
2003
2004	// create kernel vsegs in GPT and VSL, as required by the hardware architecture
2005	error = hal_vmm_kernel_init( info );
2006
2007	if( error )
2008	{
2009	printk("\n[PANIC] in %s : cannot create kernel vsegs in VMM\n", __FUNCTION__ );
2010	hal_core_sleep();
2011	}
2012
2013	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2014	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2015	printk("\n[%s] initialized hal specific VMM in cluster%x\n", __FUNCTION__, local_cxy );
2016	#endif
2017
2018	// reset th_tbl[] array and associated fields
2019	uint32_t i;
2020	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
2021	{
2022	process->th_tbl[i] = NULL;
2023	}
2024	process->th_nr = 0;
2025	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
2026
2027	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2028	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2029	printk("\n[%s] initialized th_tbl[] in cluster%x\n", __FUNCTION__, local_cxy );
2030	#endif
2031
2032	// reset children list as empty
2033	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
2034	process->children_nr = 0;
2035	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ),
2036	LOCK_PROCESS_CHILDREN );
2037
2038	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2039	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2040	printk("\n[%s] initialized children list in cluster%x\n", __FUNCTION__, local_cxy );
2041	#endif
2042
2043	// register kernel process in cluster manager local_list
2044	cluster_process_local_link( process );
2045
2046	hal_fence();
2047
2048	#if DEBUG_PROCESS_ZERO_CREATE
2049	cycle = (uint32_t)hal_get_cycles();
2050	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2051	printk("\n[%s] exit / cluster %x / cycle %d\n",
2052	__FUNCTION__, local_cxy, cycle );
2053	#endif
2054
2055	} // end process_zero_create()
2056
2057	////////////////////////////////
2058	void process_init_create( void )
2059	{
2060	process_t * process; // local pointer on process descriptor
2061	pid_t pid; // process_init identifier
2062	thread_t * thread; // local pointer on main thread
2063	pthread_attr_t attr; // main thread attributes
2064	lid_t lid; // selected core local index for main thread
2065	xptr_t file_xp; // extended pointer on .elf file descriptor
2066	uint32_t file_id; // file index in fd_array
2067	error_t error;
2068
2069	#if DEBUG_PROCESS_INIT_CREATE
2070	thread_t * this = CURRENT_THREAD;
2071	uint32_t cycle = (uint32_t)hal_get_cycles();
2072	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2073	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
2074	__FUNCTION__, this->process->pid, this->trdid, cycle );
2075	#endif
2076
2077	// allocates memory for process descriptor from local cluster
2078	process = process_alloc();
2079	if( process == NULL )
2080	{
2081	printk("\n[PANIC] in %s : cannot allocate process\n", __FUNCTION__ );
2082	hal_core_sleep();
2083	}
2084
2085	// set the CWD and VFS_ROOT fields in process descriptor
2086	process->cwd_xp = process_zero.vfs_root_xp;
2087	process->vfs_root_xp = process_zero.vfs_root_xp;
2088
2089	// get PID from local cluster
2090	error = cluster_pid_alloc( process , &pid );
2091	if( error )
2092	{
2093	printk("\n[PANIC] in %s : cannot allocate PID\n", __FUNCTION__ );
2094	hal_core_sleep();
2095	}
2096	if( pid != 1 )
2097	{
2098	printk("\n[PANIC] in %s : process PID must be 0x1\n", __FUNCTION__ );
2099	hal_core_sleep();
2100	}
2101
2102	// initialize process descriptor / parent is local process_zero
2103	error = process_reference_init( process,
2104	pid,
2105	XPTR( local_cxy , &process_zero ) );
2106	if( error )
2107	{
2108	printk("\n[PANIC] in %s : cannot initialize process\n", __FUNCTION__ );
2109	hal_core_sleep();
2110	}
2111
2112	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2113	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2114	printk("\n[%s] thread[%x,%x] initialized process descriptor\n",
2115	__FUNCTION__, this->process->pid, this->trdid );
2116	#endif
2117
2118	// open the file identified by CONFIG_PROCESS_INIT_PATH
2119	file_xp = XPTR_NULL;
2120	file_id = -1;
2121	error = vfs_open( process->vfs_root_xp,
2122	CONFIG_PROCESS_INIT_PATH,
2123	XPTR( local_cxy , process ),
2124	O_RDONLY,
2125	0,
2126	&file_xp,
2127	&file_id );
2128	if( error )
2129	{
2130	printk("\n[PANIC] in %s : cannot open file <%s>\n",
2131	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
2132	hal_core_sleep();
2133	}
2134
2135	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2136	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2137	printk("\n[%s] thread[%x,%x] open .elf file decriptor\n",
2138	__FUNCTION__, this->process->pid, this->trdid );
2139	#endif
2140
2141	// register "code" and "data" vsegs as well as entry-point
2142	// in process VMM, using information contained in the elf file.
2143	error = elf_load_process( file_xp , process );
2144
2145	if( error )
2146	{
2147	printk("\n[PANIC] in %s : cannot access file <%s>\n",
2148	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
2149	hal_core_sleep();
2150	}
2151
2152
2153	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2154	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2155	printk("\n[%s] thread[%x,%x] registered code/data vsegs in VMM\n",
2156	__FUNCTION__, this->process->pid, this->trdid );
2157	#endif
2158
2159	#if (DEBUG_PROCESS_INIT_CREATE & 1)
2160	hal_vmm_display( XPTR( local_cxy , process ) , true );
2161	#endif
2162
2163	// get extended pointers on process_zero children_root, children_lock
2164	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
2165	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
2166
2167	// take lock protecting kernel process children list
2168	remote_queuelock_acquire( children_lock_xp );
2169
2170	// register process INIT in parent local process_zero
2171	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
2172	hal_atomic_add( &process_zero.children_nr , 1 );
2173
2174	// release lock protecting kernel process children list
2175	remote_queuelock_release( children_lock_xp );
2176
2177	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2178	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2179	printk("\n[%s] thread[%x,%x] registered init process in parent\n",
2180	__FUNCTION__, this->process->pid, this->trdid );
2181	#endif
2182
2183	// select a core in local cluster to execute the main thread
2184	lid = cluster_select_local_core( local_cxy );
2185
2186	// initialize pthread attributes for main thread
2187	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
2188	attr.cxy = local_cxy;
2189	attr.lid = lid;
2190
2191	// create and initialize thread descriptor
2192	error = thread_user_create( pid,
2193	(void *)process->vmm.entry_point,
2194	NULL,
2195	&attr,
2196	&thread );
2197
2198	if( error )
2199	{
2200	printk("\n[PANIC] in %s : cannot create main thread\n", __FUNCTION__ );
2201	hal_core_sleep();
2202	}
2203	if( thread->trdid != 0 )
2204	{
2205	printk("\n[PANIC] in %s : bad main thread trdid\n", __FUNCTION__ );
2206	hal_core_sleep();
2207	}
2208
2209	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2210	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2211	printk("\n[%s] thread[%x,%x] created main thread\n",
2212	__FUNCTION__, this->process->pid, this->trdid );
2213	#endif
2214
2215	// activate thread
2216	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
2217
2218	hal_fence();
2219
2220	#if DEBUG_PROCESS_INIT_CREATE
2221	cycle = (uint32_t)hal_get_cycles();
2222	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2223	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
2224	__FUNCTION__, this->process->pid, this->trdid, cycle );
2225	#endif
2226
2227	} // end process_init_create()
2228
2229	/////////////////////////////////////////
2230	void process_display( xptr_t process_xp )
2231	{
2232	process_t * process_ptr;
2233	cxy_t process_cxy;
2234
2235	xptr_t parent_xp; // extended pointer on parent process
2236	process_t * parent_ptr;
2237	cxy_t parent_cxy;
2238
2239	xptr_t owner_xp; // extended pointer on owner process
2240	process_t * owner_ptr;
2241	cxy_t owner_cxy;
2242
2243	pid_t pid;
2244	pid_t ppid;
2245	lpid_t lpid;
2246	uint32_t state;
2247	uint32_t th_nr;
2248
2249	xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor
2250	xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev
2251	chdev_t * txt_chdev_ptr;
2252	cxy_t txt_chdev_cxy;
2253	xptr_t txt_owner_xp; // extended pointer on TXT owner process
2254
2255	xptr_t elf_file_xp; // extended pointer on .elf file
2256	cxy_t elf_file_cxy;
2257	vfs_file_t * elf_file_ptr;
2258	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
2259
2260	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
2261	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
2262
2263	// get cluster and local pointer on process
2264	process_ptr = GET_PTR( process_xp );
2265	process_cxy = GET_CXY( process_xp );
2266
2267	// get process PID, LPID, and state
2268	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2269	lpid = LPID_FROM_PID( pid );
2270	state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) );
2271
2272	// get process PPID
2273	parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
2274	parent_cxy = GET_CXY( parent_xp );
2275	parent_ptr = GET_PTR( parent_xp );
2276	ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
2277
2278	// get number of threads
2279	th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) );
2280
2281	// get pointers on owner process descriptor
2282	owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) );
2283	owner_cxy = GET_CXY( owner_xp );
2284	owner_ptr = GET_PTR( owner_xp );
2285
2286	// get process TXT name and .elf name
2287	if( lpid ) // user process
2288	{
2289
2290	// get extended pointer on file descriptor associated to TXT_RX
2291	txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) );
2292
2293	assert( (txt_file_xp != XPTR_NULL) ,
2294	"process must be attached to one TXT terminal" );
2295
2296	// get TXT_RX chdev pointers
2297	txt_chdev_xp = chdev_from_file( txt_file_xp );
2298	txt_chdev_cxy = GET_CXY( txt_chdev_xp );
2299	txt_chdev_ptr = GET_PTR( txt_chdev_xp );
2300
2301	// get TXT_RX name and ownership
2302	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
2303	XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) );
2304
2305	txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy,
2306	&txt_chdev_ptr->ext.txt.owner_xp ) );
2307
2308	// get process .elf name
2309	elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
2310	elf_file_cxy = GET_CXY( elf_file_xp );
2311	elf_file_ptr = GET_PTR( elf_file_xp );
2312	elf_inode_ptr = hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
2313	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
2314	}
2315	else // kernel process_zero
2316	{
2317	// TXT name and .elf name are not registered in kernel process_zero
2318	strcpy( txt_name , "txt0_rx" );
2319	txt_owner_xp = process_xp;
2320	strcpy( elf_name , "kernel.elf" );
2321	}
2322
2323	// display process info
2324	if( txt_owner_xp == process_xp )
2325	{
2326	nolock_printk("PID %X \| %s (FG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2327	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2328	}
2329	else
2330	{
2331	nolock_printk("PID %X \| %s (BG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2332	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2333	}
2334	} // end process_display()
2335
2336
2337	////////////////////////////////////////////////////////////////////////////////////////
2338	// Terminals related functions
2339	////////////////////////////////////////////////////////////////////////////////////////
2340
2341	//////////////////////////////////
2342	uint32_t process_txt_alloc( void )
2343	{
2344	uint32_t index; // TXT terminal index
2345	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2346	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2347	cxy_t chdev_cxy; // TXT_RX chdev cluster
2348	xptr_t root_xp; // extended pointer on owner field in chdev
2349
2350	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
2351	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
2352	{
2353	// get pointers on TXT_RX[index]
2354	chdev_xp = chdev_dir.txt_rx[index];
2355	chdev_cxy = GET_CXY( chdev_xp );
2356	chdev_ptr = GET_PTR( chdev_xp );
2357
2358	// get extended pointer on root of attached process
2359	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2360
2361	// return free TXT index if found
2362	if( xlist_is_empty( root_xp ) ) return index;
2363	}
2364
2365	assert( false , "no free TXT terminal found" );
2366
2367	return -1;
2368
2369	} // end process_txt_alloc()
2370
2371	/////////////////////////////////////////////
2372	void process_txt_attach( process_t * process,
2373	uint32_t txt_id )
2374	{
2375	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2376	cxy_t chdev_cxy; // TXT_RX chdev cluster
2377	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2378	xptr_t root_xp; // extended pointer on list root in chdev
2379	xptr_t lock_xp; // extended pointer on list lock in chdev
2380
2381	// check process is in owner cluster
2382	assert( (CXY_FROM_PID( process->pid ) == local_cxy) ,
2383	"process descriptor not in owner cluster" );
2384
2385	// check terminal index
2386	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2387	"illegal TXT terminal index" );
2388
2389	// get pointers on TXT_RX[txt_id] chdev
2390	chdev_xp = chdev_dir.txt_rx[txt_id];
2391	chdev_cxy = GET_CXY( chdev_xp );
2392	chdev_ptr = GET_PTR( chdev_xp );
2393
2394	// get extended pointer on root & lock of attached process list
2395	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2396	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2397
2398	// get lock protecting list of processes attached to TXT
2399	remote_busylock_acquire( lock_xp );
2400
2401	// insert process in attached process list
2402	xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) );
2403
2404	// release lock protecting list of processes attached to TXT
2405	remote_busylock_release( lock_xp );
2406
2407	#if DEBUG_PROCESS_TXT
2408	thread_t * this = CURRENT_THREAD;
2409	uint32_t cycle = (uint32_t)hal_get_cycles();
2410	if( DEBUG_PROCESS_TXT < cycle )
2411	printk("\n[%s] thread[%x,%x] attached process %x to TXT %d / cycle %d\n",
2412	__FUNCTION__, this->process->pid, this->trdid, process->pid, txt_id , cycle );
2413	#endif
2414
2415	} // end process_txt_attach()
2416
2417	/////////////////////////////////////////////
2418	void process_txt_detach( xptr_t process_xp )
2419	{
2420	process_t * process_ptr; // local pointer on process in owner cluster
2421	cxy_t process_cxy; // process owner cluster
2422	pid_t process_pid; // process identifier
2423	xptr_t file_xp; // extended pointer on stdin file
2424	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2425	cxy_t chdev_cxy; // TXT_RX chdev cluster
2426	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2427	xptr_t lock_xp; // extended pointer on list lock in chdev
2428
2429	// get process cluster, local pointer, and PID
2430	process_cxy = GET_CXY( process_xp );
2431	process_ptr = GET_PTR( process_xp );
2432	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2433
2434	// check process descriptor in owner cluster
2435	assert( (CXY_FROM_PID( process_pid ) == process_cxy ) ,
2436	"process descriptor not in owner cluster" );
2437
2438	// release TXT ownership (does nothing if not TXT owner)
2439	process_txt_transfer_ownership( process_xp );
2440
2441	// get extended pointer on process stdin pseudo file
2442	file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2443
2444	// get pointers on TXT_RX chdev
2445	chdev_xp = chdev_from_file( file_xp );
2446	chdev_cxy = GET_CXY( chdev_xp );
2447	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
2448
2449	// get extended pointer on lock protecting attached process list
2450	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2451
2452	// get lock protecting list of processes attached to TXT
2453	remote_busylock_acquire( lock_xp );
2454
2455	// unlink process from attached process list
2456	xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) );
2457
2458	// release lock protecting list of processes attached to TXT
2459	remote_busylock_release( lock_xp );
2460
2461	#if DEBUG_PROCESS_TXT
2462	thread_t * this = CURRENT_THREAD;
2463	uint32_t cycle = (uint32_t)hal_get_cycles();
2464	uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
2465	if( DEBUG_PROCESS_TXT < cycle )
2466	printk("\n[%s] thread[%x,%x] detached process %x from TXT%d / cycle %d\n",
2467	__FUNCTION__, this->process->pid, this->trdid, process_pid, txt_id, cycle );
2468	#endif
2469
2470	} // end process_txt_detach()
2471
2472	///////////////////////////////////////////////////
2473	void process_txt_set_ownership( xptr_t process_xp )
2474	{
2475	process_t * process_ptr;
2476	cxy_t process_cxy;
2477	pid_t process_pid;
2478	xptr_t file_xp;
2479	xptr_t txt_xp;
2480	chdev_t * txt_ptr;
2481	cxy_t txt_cxy;
2482
2483	// get pointers on process in owner cluster
2484	process_cxy = GET_CXY( process_xp );
2485	process_ptr = GET_PTR( process_xp );
2486	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2487
2488	// check owner cluster
2489	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2490	"process descriptor not in owner cluster" );
2491
2492	// get extended pointer on stdin pseudo file
2493	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2494
2495	// get pointers on TXT chdev
2496	txt_xp = chdev_from_file( file_xp );
2497	txt_cxy = GET_CXY( txt_xp );
2498	txt_ptr = GET_PTR( txt_xp );
2499
2500	// set owner field in TXT chdev
2501	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
2502
2503	#if DEBUG_PROCESS_TXT
2504	thread_t * this = CURRENT_THREAD;
2505	uint32_t cycle = (uint32_t)hal_get_cycles();
2506	uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2507	if( DEBUG_PROCESS_TXT < cycle )
2508	printk("\n[%s] thread[%x,%x] give TXT%d ownership to process %x / cycle %d\n",
2509	__FUNCTION__, this->process->pid, this->trdid, txt_id, process_pid, cycle );
2510	#endif
2511
2512	} // end process_txt_set ownership()
2513
2514	////////////////////////////////////////////////////////
2515	void process_txt_transfer_ownership( xptr_t process_xp )
2516	{
2517	process_t * process_ptr; // local pointer on process releasing ownership
2518	cxy_t process_cxy; // process cluster
2519	pid_t process_pid; // process identifier
2520	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
2521	xptr_t txt_xp; // extended pointer on TXT_RX chdev
2522	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
2523	cxy_t txt_cxy; // cluster of TXT_RX chdev
2524	uint32_t txt_id; // TXT_RX channel
2525	xptr_t owner_xp; // extended pointer on current TXT_RX owner
2526	xptr_t root_xp; // extended pointer on root of attached process list
2527	xptr_t lock_xp; // extended pointer on lock protecting attached process list
2528	xptr_t iter_xp; // iterator for xlist
2529	xptr_t current_xp; // extended pointer on current process
2530	bool_t found;
2531
2532	#if DEBUG_PROCESS_TXT
2533	thread_t * this = CURRENT_THREAD;
2534	uint32_t cycle;
2535	#endif
2536
2537	// get pointers on target process
2538	process_cxy = GET_CXY( process_xp );
2539	process_ptr = GET_PTR( process_xp );
2540	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2541
2542	// check owner cluster
2543	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2544	"process descriptor not in owner cluster" );
2545
2546	// get extended pointer on stdin pseudo file
2547	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2548
2549	// get pointers on TXT chdev
2550	txt_xp = chdev_from_file( file_xp );
2551	txt_cxy = GET_CXY( txt_xp );
2552	txt_ptr = GET_PTR( txt_xp );
2553
2554	// get relevant infos from chdev descriptor
2555	owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2556	txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2557
2558	// transfer ownership only if target process is the TXT owner
2559	if( (owner_xp == process_xp) && (txt_id > 0) )
2560	{
2561	// get extended pointers on root and lock of attached processes list
2562	root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root );
2563	lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock );
2564
2565	if( process_get_ppid( process_xp ) != 1 ) // target process is not KSH
2566	{
2567	// get lock
2568	remote_busylock_acquire( lock_xp );
2569
2570	// scan attached process list to find KSH process
2571	found = false;
2572	for( iter_xp = hal_remote_l64( root_xp ) ;
2573	(iter_xp != root_xp) && (found == false) ;
2574	iter_xp = hal_remote_l64( iter_xp ) )
2575	{
2576	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2577
2578	if( process_get_ppid( current_xp ) == 1 ) // current is KSH
2579	{
2580	// set owner field in TXT chdev
2581	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2582
2583	#if DEBUG_PROCESS_TXT
2584	cycle = (uint32_t)hal_get_cycles();
2585	if( DEBUG_PROCESS_TXT < cycle )
2586	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to KSH / cycle %d\n",
2587	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2588	#endif
2589	found = true;
2590	}
2591	}
2592
2593	// release lock
2594	remote_busylock_release( lock_xp );
2595
2596	// It must exist a KSH process for each user TXT channel
2597	assert( (found == true), "KSH process not found for TXT%d", txt_id );
2598
2599	}
2600	else // target process is KSH
2601	{
2602	// get lock
2603	remote_busylock_acquire( lock_xp );
2604
2605	// scan attached process list to find another process
2606	found = false;
2607	for( iter_xp = hal_remote_l64( root_xp ) ;
2608	(iter_xp != root_xp) && (found == false) ;
2609	iter_xp = hal_remote_l64( iter_xp ) )
2610	{
2611	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2612
2613	if( current_xp != process_xp ) // current is not KSH
2614	{
2615	// set owner field in TXT chdev
2616	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2617
2618	#if DEBUG_PROCESS_TXT
2619	cycle = (uint32_t)hal_get_cycles();
2620	cxy_t current_cxy = GET_CXY( current_xp );
2621	process_t * current_ptr = GET_PTR( current_xp );
2622	uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
2623	if( DEBUG_PROCESS_TXT < cycle )
2624	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to process %x / cycle %d\n",
2625	__FUNCTION__,this->process->pid, this->trdid, txt_id, new_pid, cycle );
2626	#endif
2627	found = true;
2628	}
2629	}
2630
2631	// release lock
2632	remote_busylock_release( lock_xp );
2633
2634	// no more owner for TXT if no other process found
2635	if( found == false )
2636	{
2637	// set owner field in TXT chdev
2638	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL );
2639
2640	#if DEBUG_PROCESS_TXT
2641	cycle = (uint32_t)hal_get_cycles();
2642	if( DEBUG_PROCESS_TXT < cycle )
2643	printk("\n[%s] thread[%x,%x] released TXT%d (no attached process) / cycle %d\n",
2644	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2645	#endif
2646	}
2647	}
2648	}
2649	else
2650	{
2651
2652	#if DEBUG_PROCESS_TXT
2653	cycle = (uint32_t)hal_get_cycles();
2654	if( DEBUG_PROCESS_TXT < cycle )
2655	printk("\n[%s] thread[%x,%x] does nothing for process %x (not TXT owner) / cycle %d\n",
2656	__FUNCTION__, this->process->pid, this->trdid, process_pid, cycle );
2657	#endif
2658
2659	}
2660
2661	} // end process_txt_transfer_ownership()
2662
2663
2664	////////////////////////////////////////////////
2665	bool_t process_txt_is_owner( xptr_t process_xp )
2666	{
2667	// get local pointer and cluster of process in owner cluster
2668	cxy_t process_cxy = GET_CXY( process_xp );
2669	process_t * process_ptr = GET_PTR( process_xp );
2670
2671	// check calling thread execute in target process owner cluster
2672	pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2673	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2674	"process descriptor not in owner cluster" );
2675
2676	// get extended pointer on stdin pseudo file
2677	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2678
2679	// get pointers on TXT chdev
2680	xptr_t txt_xp = chdev_from_file( file_xp );
2681	cxy_t txt_cxy = GET_CXY( txt_xp );
2682	chdev_t * txt_ptr = GET_PTR( txt_xp );
2683
2684	// get extended pointer on TXT_RX owner process
2685	xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2686
2687	return (process_xp == owner_xp);
2688
2689	} // end process_txt_is_owner()
2690
2691	////////////////////////////////////////////////
2692	xptr_t process_txt_get_owner( uint32_t channel )
2693	{
2694	xptr_t txt_rx_xp = chdev_dir.txt_rx[channel];
2695	cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp );
2696	chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp );
2697
2698	return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) );
2699
2700	} // end process_txt_get_owner()
2701
2702	///////////////////////////////////////////
2703	void process_txt_display( uint32_t txt_id )
2704	{
2705	xptr_t chdev_xp;
2706	cxy_t chdev_cxy;
2707	chdev_t * chdev_ptr;
2708	xptr_t root_xp;
2709	xptr_t lock_xp;
2710	xptr_t current_xp;
2711	xptr_t iter_xp;
2712	cxy_t txt0_cxy;
2713	chdev_t * txt0_ptr;
2714	xptr_t txt0_xp;
2715	xptr_t txt0_lock_xp;
2716
2717	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2718	"illegal TXT terminal index" );
2719
2720	// get pointers on TXT0 chdev
2721	txt0_xp = chdev_dir.txt_tx[0];
2722	txt0_cxy = GET_CXY( txt0_xp );
2723	txt0_ptr = GET_PTR( txt0_xp );
2724
2725	// get extended pointer on TXT0 lock
2726	txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
2727
2728	// get pointers on TXT_RX[txt_id] chdev
2729	chdev_xp = chdev_dir.txt_rx[txt_id];
2730	chdev_cxy = GET_CXY( chdev_xp );
2731	chdev_ptr = GET_PTR( chdev_xp );
2732
2733	// get extended pointer on root & lock of attached process list
2734	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2735	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2736
2737	// get lock on attached process list
2738	remote_busylock_acquire( lock_xp );
2739
2740	// get TXT0 lock in busy waiting mode
2741	remote_busylock_acquire( txt0_lock_xp );
2742
2743	// display header
2744	nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n",
2745	txt_id , (uint32_t)hal_get_cycles() );
2746
2747	// scan attached process list
2748	XLIST_FOREACH( root_xp , iter_xp )
2749	{
2750	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2751	process_display( current_xp );
2752	}
2753
2754	// release TXT0 lock in busy waiting mode
2755	remote_busylock_release( txt0_lock_xp );
2756
2757	// release lock on attached process list
2758	remote_busylock_release( lock_xp );
2759
2760	} // end process_txt_display

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