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process.c @ 627

Last change on this file since 627 was 626, checked in by alain, 5 years ago

This version has been tested on the sort multithreaded application
for TSAR_IOB architectures ranging from 1 to 8 clusters.
It fixes three bigs bugs:
1) the dev_ioc device API has been modified: the dev_ioc_sync_read()
and dev_ioc_sync_write() function use now extended pointers on the
kernel buffer to access a mapper stored in any cluster.
2) the hal_uspace API has been modified: the hal_copy_to_uspace()
and hal_copy_from_uspace() functions use now a (cxy,ptr) couple
to identify the target buffer (equivalent to an extended pointer.
3) an implementation bug has been fixed in the assembly code contained
in the hal_copy_to_uspace() and hal_copy_from_uspace() functions.

File size: 83.6 KB

Line
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)
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_PROCESS;
77	req.size = sizeof(process_t);
78	req.flags = AF_KERNEL;
79
80	return (process_t *)kmem_alloc( &req );
81	}
82
83	////////////////////////////////////////
84	void process_free( process_t * process )
85	{
86	kmem_req_t req;
87
88	req.type = KMEM_PROCESS;
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 GPT and VSL locks
169	remote_rwlock_init( XPTR( local_cxy , &vmm->gpt_lock ) , LOCK_VMM_GPT );
170	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
171
172	// register kernel vsegs in VMM as required by the architecture
173	error = hal_vmm_kernel_update( process );
174	if( error )
175	{
176	printk("\n[ERROR] in %s : cannot register kernel vsegs in VMM\n", __FUNCTION__ );
177	return -1;
178	}
179
180	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
181	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
182	printk("\n[%s] thread[%x,%x] registered kernel vsegs for process %x\n",
183	__FUNCTION__, parent_pid, this->trdid, pid );
184	#endif
185
186	// create "args" and "envs" vsegs
187	// create "stacks" and "mmap" vsegs allocators
188	// initialize locks protecting GPT and VSL
189	error = vmm_user_init( process );
190	if( error )
191	{
192	printk("\n[ERROR] in %s : cannot register user vsegs in VMM\n", __FUNCTION__ );
193	return -1;
194	}
195
196	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
197	cycle = (uint32_t)hal_get_cycles();
198	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
199	printk("\n[%s] thread[%x,%x] initialized vmm for process %x\n",
200	__FUNCTION__, parent_pid, this->trdid, pid );
201	#endif
202
203	// initialize fd_array as empty
204	process_fd_init( process );
205
206	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
207	if( (pid == 1) \|\| (parent_pid == 1) ) // INIT or KSH process
208	{
209	// select a TXT channel
210	if( pid == 1 ) txt_id = 0; // INIT
211	else txt_id = process_txt_alloc(); // KSH
212
213	// attach process to TXT
214	process_txt_attach( process , txt_id );
215
216	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
217	cycle = (uint32_t)hal_get_cycles();
218	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
219	printk("\n[%s] thread[%x,%x] / process %x attached to TXT%d / cycle %d\n",
220	__FUNCTION__, parent_pid, this->trdid, pid, txt_id, cycle );
221	#endif
222	// build path to TXT_RX[i] and TXT_TX[i] chdevs
223	snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
224	snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
225
226	// create stdin pseudo file
227	error = vfs_open( process->vfs_root_xp,
228	rx_path,
229	process_xp,
230	O_RDONLY,
231	0, // FIXME chmod
232	&stdin_xp,
233	&stdin_id );
234	if( error )
235	{
236	printk("\n[ERROR] in %s : cannot open stdout pseudo-file\n", __FUNCTION__ );
237	return -1;
238	}
239
240	assert( (stdin_id == 0) , "stdin index must be 0" );
241
242	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
243	cycle = (uint32_t)hal_get_cycles();
244	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
245	printk("\n[%s] thread[%x,%x] / stdin open for process %x / cycle %d\n",
246	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
247	#endif
248
249	// create stdout pseudo file
250	error = vfs_open( process->vfs_root_xp,
251	tx_path,
252	process_xp,
253	O_WRONLY,
254	0, // FIXME chmod
255	&stdout_xp,
256	&stdout_id );
257	if( error )
258	{
259	printk("\n[ERROR] in %s : cannot open stdout pseudo-file\n", __FUNCTION__ );
260	return -1;
261	}
262
263	assert( (stdout_id == 1) , "stdout index must be 1" );
264
265	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
266	cycle = (uint32_t)hal_get_cycles();
267	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
268	printk("\n[%s] thread[%x,%x] / stdout open for process %x / cycle %d\n",
269	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
270	#endif
271
272	// create stderr pseudo file
273	error = vfs_open( process->vfs_root_xp,
274	tx_path,
275	process_xp,
276	O_WRONLY,
277	0, // FIXME chmod
278	&stderr_xp,
279	&stderr_id );
280	if( error )
281	{
282	printk("\n[ERROR] in %s : cannot open stderr pseudo-file\n", __FUNCTION__ );
283	return -1;
284	}
285
286	assert( (stderr_id == 2) , "stderr index must be 2" );
287
288	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
289	cycle = (uint32_t)hal_get_cycles();
290	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
291	printk("\n[%s] thread[%x,%x] / stderr open for process %x / cycle %d\n",
292	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
293	#endif
294
295	}
296	else // normal user process
297	{
298	// get extended pointer on stdin pseudo file in parent process
299	file_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy,
300	&parent_ptr->fd_array.array[0] ) );
301
302	// get extended pointer on parent process TXT chdev
303	chdev_xp = chdev_from_file( file_xp );
304
305	// get cluster and local pointer on chdev
306	chdev_cxy = GET_CXY( chdev_xp );
307	chdev_ptr = GET_PTR( chdev_xp );
308
309	// get parent process TXT terminal index
310	txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
311
312	// attach child process to parent process TXT terminal
313	process_txt_attach( process , txt_id );
314
315	// copy all open files from parent process fd_array to this process
316	process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ),
317	XPTR( parent_cxy , &parent_ptr->fd_array ) );
318	}
319
320	// initialize lock protecting CWD changes
321	remote_busylock_init( XPTR( local_cxy ,
322	&process->cwd_lock ), LOCK_PROCESS_CWD );
323
324	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
325	cycle = (uint32_t)hal_get_cycles();
326	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
327	printk("\n[%s] thread[%x,%x] / set fd_array for process %x / cycle %d\n",
328	__FUNCTION__, parent_pid, this->trdid, pid , cycle );
329	#endif
330
331	// reset children list root
332	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
333	process->children_nr = 0;
334	remote_queuelock_init( XPTR( local_cxy,
335	&process->children_lock ), LOCK_PROCESS_CHILDREN );
336
337	// reset semaphore / mutex / barrier / condvar list roots and lock
338	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
339	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
340	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
341	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
342	remote_queuelock_init( XPTR( local_cxy ,
343	&process->sync_lock ), LOCK_PROCESS_USERSYNC );
344
345	// reset open directories root and lock
346	xlist_root_init( XPTR( local_cxy , &process->dir_root ) );
347	remote_queuelock_init( XPTR( local_cxy ,
348	&process->dir_lock ), LOCK_PROCESS_DIR );
349
350	// register new process in the local cluster manager pref_tbl[]
351	lpid_t lpid = LPID_FROM_PID( pid );
352	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
353
354	// register new process descriptor in local cluster manager local_list
355	cluster_process_local_link( process );
356
357	// register new process descriptor in local cluster manager copies_list
358	cluster_process_copies_link( process );
359
360	// initialize th_tbl[] array and associated threads
361	uint32_t i;
362
363	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
364	{
365	process->th_tbl[i] = NULL;
366	}
367	process->th_nr = 0;
368	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
369
370	hal_fence();
371
372	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
373	cycle = (uint32_t)hal_get_cycles();
374	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
375	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
376	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
377	#endif
378
379	return 0;
380
381	} // process_reference_init()
382
383	/////////////////////////////////////////////////////
384	error_t process_copy_init( process_t * local_process,
385	xptr_t reference_process_xp )
386	{
387	error_t error;
388	vmm_t * vmm;
389
390	// get reference process cluster and local pointer
391	cxy_t ref_cxy = GET_CXY( reference_process_xp );
392	process_t * ref_ptr = GET_PTR( reference_process_xp );
393
394	// get pointer on process vmm
395	vmm = &local_process->vmm;
396
397	// initialize PID, REF_XP, PARENT_XP, and STATE
398	local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) );
399	local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
400	local_process->ref_xp = reference_process_xp;
401	local_process->owner_xp = reference_process_xp;
402	local_process->term_state = 0;
403
404	#if DEBUG_PROCESS_COPY_INIT
405	thread_t * this = CURRENT_THREAD;
406	uint32_t cycle = (uint32_t)hal_get_cycles();
407	if( DEBUG_PROCESS_COPY_INIT < cycle )
408	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
409	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
410	#endif
411
412	// check user process
413	assert( (local_process->pid != 0), "LPID cannot be 0" );
414
415	// initialize VSL as empty
416	vmm->vsegs_nr = 0;
417	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
418
419	// create an empty GPT as required by the architecture
420	error = hal_gpt_create( &vmm->gpt );
421	if( error )
422	{
423	printk("\n[ERROR] in %s : cannot create empty GPT\n", __FUNCTION__ );
424	return -1;
425	}
426
427	// initialize GPT and VSL locks
428	remote_rwlock_init( XPTR( local_cxy , &vmm->gpt_lock ) , LOCK_VMM_GPT );
429	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
430
431	// register kernel vsegs in VMM as required by the architecture
432	error = hal_vmm_kernel_update( local_process );
433	if( error )
434	{
435	printk("\n[ERROR] in %s : cannot register kernel vsegs in VMM\n", __FUNCTION__ );
436	return -1;
437	}
438
439	// create "args" and "envs" vsegs
440	// create "stacks" and "mmap" vsegs allocators
441	// initialize locks protecting GPT and VSL
442	error = vmm_user_init( local_process );
443	if( error )
444	{
445	printk("\n[ERROR] in %s : cannot register user vsegs in VMM\n", __FUNCTION__ );
446	return -1;
447	}
448
449	#if (DEBUG_PROCESS_COPY_INIT & 1)
450	cycle = (uint32_t)hal_get_cycles();
451	if( DEBUG_PROCESS_COPY_INIT < cycle )
452	printk("\n[%s] thread[%x,%x] initialized vmm for process %x / cycle %d\n",
453	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
454	#endif
455
456	// set process file descriptors array
457	process_fd_init( local_process );
458
459	// set vfs_root_xp / vfs_bin_xp / cwd_xp fields
460	local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
461	local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
462	local_process->cwd_xp = XPTR_NULL;
463
464	// reset children list root (not used in a process descriptor copy)
465	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
466	local_process->children_nr = 0;
467	remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ),
468	LOCK_PROCESS_CHILDREN );
469
470	// reset children_list (not used in a process descriptor copy)
471	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
472
473	// reset semaphores list root (not used in a process descriptor copy)
474	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
475	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
476	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
477	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
478
479	// initialize th_tbl[] array and associated fields
480	uint32_t i;
481	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
482	{
483	local_process->th_tbl[i] = NULL;
484	}
485	local_process->th_nr = 0;
486	rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL );
487
488	// register new process descriptor in local cluster manager local_list
489	cluster_process_local_link( local_process );
490
491	// register new process descriptor in owner cluster manager copies_list
492	cluster_process_copies_link( local_process );
493
494	hal_fence();
495
496	#if DEBUG_PROCESS_COPY_INIT
497	cycle = (uint32_t)hal_get_cycles();
498	if( DEBUG_PROCESS_COPY_INIT < cycle )
499	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
500	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
501	#endif
502
503	return 0;
504
505	} // end process_copy_init()
506
507	///////////////////////////////////////////
508	void process_destroy( process_t * process )
509	{
510	xptr_t parent_xp;
511	process_t * parent_ptr;
512	cxy_t parent_cxy;
513	xptr_t children_lock_xp;
514	xptr_t children_nr_xp;
515
516	pid_t pid = process->pid;
517
518	// check no more threads
519	assert( (process->th_nr == 0),
520	"process %x in cluster %x contains threads", pid , local_cxy );
521
522	#if DEBUG_PROCESS_DESTROY
523	thread_t * this = CURRENT_THREAD;
524	uint32_t cycle = (uint32_t)hal_get_cycles();
525	if( DEBUG_PROCESS_DESTROY < cycle )
526	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
527	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
528	#endif
529
530	// Destroy VMM
531	vmm_destroy( process );
532
533	#if (DEBUG_PROCESS_DESTROY & 1)
534	if( DEBUG_PROCESS_DESTROY < cycle )
535	printk("\n[%s] thread[%x,%x] destroyed VMM for process %x in cluster %x\n",
536	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
537	#endif
538
539	// remove process from local_list in local cluster manager
540	cluster_process_local_unlink( process );
541
542	#if (DEBUG_PROCESS_DESTROY & 1)
543	if( DEBUG_PROCESS_DESTROY < cycle )
544	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from local list\n",
545	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
546	#endif
547
548	// remove process from copies_list in owner cluster manager
549	cluster_process_copies_unlink( process );
550
551	#if (DEBUG_PROCESS_DESTROY & 1)
552	if( DEBUG_PROCESS_DESTROY < cycle )
553	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from copies list\n",
554	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
555	#endif
556
557	// when target process cluster is the owner cluster
558	// - remove process from TXT list and transfer ownership
559	// - remove process from children_list
560	// - release PID
561	if( CXY_FROM_PID( pid ) == local_cxy )
562	{
563	process_txt_detach( XPTR( local_cxy , process ) );
564
565	#if (DEBUG_PROCESS_DESTROY & 1)
566	if( DEBUG_PROCESS_DESTROY < cycle )
567	printk("\n[%s] thread[%x,%x] removed process %x from TXT list\n",
568	__FUNCTION__, this->process->pid, this->trdid, pid );
569	#endif
570
571	// get pointers on parent process
572	parent_xp = process->parent_xp;
573	parent_cxy = GET_CXY( parent_xp );
574	parent_ptr = GET_PTR( parent_xp );
575
576	// get extended pointer on children_lock in parent process
577	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
578	children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
579
580	// remove process from children_list
581	remote_queuelock_acquire( children_lock_xp );
582	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
583	hal_remote_atomic_add( children_nr_xp , -1 );
584	remote_queuelock_release( children_lock_xp );
585
586	#if (DEBUG_PROCESS_DESTROY & 1)
587	if( DEBUG_PROCESS_DESTROY < cycle )
588	printk("\n[%s] thread[%x,%x] removed process %x from parent process children list\n",
589	__FUNCTION__, this->process->pid, this->trdid, pid );
590	#endif
591
592	// release the process PID to cluster manager
593	cluster_pid_release( pid );
594
595	#if (DEBUG_PROCESS_DESTROY & 1)
596	if( DEBUG_PROCESS_DESTROY < cycle )
597	printk("\n[%s] thread[%x,%x] released process PID %x to pmgr in cluster %x\n",
598	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
599	#endif
600
601	}
602
603	// FIXME decrement the refcount on file pointer for vfs_bin_xp [AG]
604
605	// FIXME close all open files [AG]
606
607	// FIXME synchronize dirty files [AG]
608
609	// release memory allocated to process descriptor
610	process_free( process );
611
612	#if DEBUG_PROCESS_DESTROY
613	cycle = (uint32_t)hal_get_cycles();
614	if( DEBUG_PROCESS_DESTROY < cycle )
615	printk("\n[%s] thread[%x,%x] exit / process %x in cluster %x / cycle %d\n",
616	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
617	#endif
618
619	} // end process_destroy()
620
621	///////////////////////////////////////////////////////////////////
622	const char * process_action_str( process_sigactions_t action_type )
623	{
624	switch ( action_type )
625	{
626	case BLOCK_ALL_THREADS: return "BLOCK";
627	case UNBLOCK_ALL_THREADS: return "UNBLOCK";
628	case DELETE_ALL_THREADS: return "DELETE";
629	default: return "undefined";
630	}
631	}
632
633	////////////////////////////////////////
634	void process_sigaction( pid_t pid,
635	uint32_t type )
636	{
637	cxy_t owner_cxy; // owner cluster identifier
638	lpid_t lpid; // process index in owner cluster
639	cluster_t * cluster; // pointer on cluster manager
640	xptr_t root_xp; // extended pointer on root of copies
641	xptr_t lock_xp; // extended pointer on lock protecting copies
642	xptr_t iter_xp; // iterator on copies list
643	xptr_t process_xp; // extended pointer on process copy
644	cxy_t process_cxy; // process copy cluster identifier
645	process_t * process_ptr; // local pointer on process copy
646	reg_t save_sr; // for critical section
647	thread_t * client; // pointer on client thread
648	xptr_t client_xp; // extended pointer on client thread
649	process_t * local; // pointer on process copy in local cluster
650	uint32_t remote_nr; // number of remote process copies
651	rpc_desc_t rpc; // shared RPC descriptor
652	uint32_t responses; // shared RPC responses counter
653
654	client = CURRENT_THREAD;
655	client_xp = XPTR( local_cxy , client );
656	local = NULL;
657	remote_nr = 0;
658
659	// check calling thread can yield
660	thread_assert_can_yield( client , __FUNCTION__ );
661
662	#if DEBUG_PROCESS_SIGACTION
663	uint32_t cycle = (uint32_t)hal_get_cycles();
664	if( DEBUG_PROCESS_SIGACTION < cycle )
665	printk("\n[%s] thread[%x,%x] enter to %s process %x / cycle %d\n",
666	__FUNCTION__ , client->process->pid, client->trdid,
667	process_action_str( type ) , pid , cycle );
668	#endif
669
670	// get pointer on local cluster manager
671	cluster = LOCAL_CLUSTER;
672
673	// get owner cluster identifier and process lpid
674	owner_cxy = CXY_FROM_PID( pid );
675	lpid = LPID_FROM_PID( pid );
676
677	// get root of list of copies and lock from owner cluster
678	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
679	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
680
681	// check action type
682	assert( ((type == DELETE_ALL_THREADS ) \|\|
683	(type == BLOCK_ALL_THREADS ) \|\|
684	(type == UNBLOCK_ALL_THREADS )), "illegal action type" );
685
686	// This client thread send parallel RPCs to all remote clusters containing
687	// target process copies, wait all responses, and then handles directly
688	// the threads in local cluster, when required.
689	// The client thread allocates a - shared - RPC descriptor in the stack,
690	// because all parallel, non-blocking, server threads use the same input
691	// arguments, and use the shared RPC response field
692
693	// mask IRQs
694	hal_disable_irq( &save_sr);
695
696	// client thread blocks itself
697	thread_block( client_xp , THREAD_BLOCKED_RPC );
698
699	// initialize RPC responses counter
700	responses = 0;
701
702	// initialize shared RPC descriptor
703	// can be shared, because no out arguments
704	rpc.rsp = &responses;
705	rpc.blocking = false;
706	rpc.index = RPC_PROCESS_SIGACTION;
707	rpc.thread = client;
708	rpc.lid = client->core->lid;
709	rpc.args[0] = pid;
710	rpc.args[1] = type;
711
712	// take the lock protecting process copies
713	remote_queuelock_acquire( lock_xp );
714
715	// scan list of process copies
716	XLIST_FOREACH( root_xp , iter_xp )
717	{
718	// get extended pointers and cluster on process
719	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
720	process_cxy = GET_CXY( process_xp );
721	process_ptr = GET_PTR( process_xp );
722
723	if( process_cxy == local_cxy ) // process copy is local
724	{
725	local = process_ptr;
726	}
727	else // process copy is remote
728	{
729	// update number of remote process copies
730	remote_nr++;
731
732	// atomically increment RPC responses counter
733	hal_atomic_add( &responses , 1 );
734
735	#if DEBUG_PROCESS_SIGACTION
736	if( DEBUG_PROCESS_SIGACTION < cycle )
737	printk("\n[%s] thread[%x,%x] send RPC to cluster %x for process %x\n",
738	__FUNCTION__, client->process->pid, client->trdid, process_cxy, pid );
739	#endif
740	// call RPC in target cluster
741	rpc_send( process_cxy , &rpc );
742	}
743	} // end list of copies
744
745	// release the lock protecting process copies
746	remote_queuelock_release( lock_xp );
747
748	// restore IRQs
749	hal_restore_irq( save_sr);
750
751	// - if there is remote process copies, the client thread deschedules,
752	// (it will be unblocked by the last RPC server thread).
753	// - if there is no remote copies, the client thread unblock itself.
754	if( remote_nr )
755	{
756	sched_yield("blocked on rpc_process_sigaction");
757	}
758	else
759	{
760	thread_unblock( client_xp , THREAD_BLOCKED_RPC );
761	}
762
763	// handle the local process copy if required
764	if( local != NULL )
765	{
766
767	#if DEBUG_PROCESS_SIGACTION
768	if( DEBUG_PROCESS_SIGACTION < cycle )
769	printk("\n[%s] thread[%x,%x] handles local process %x in cluster %x\n",
770	__FUNCTION__, client->process->pid, client->trdid, pid , local_cxy );
771	#endif
772	if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp );
773	else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local );
774	else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local );
775	}
776
777	#if DEBUG_PROCESS_SIGACTION
778	cycle = (uint32_t)hal_get_cycles();
779	if( DEBUG_PROCESS_SIGACTION < cycle )
780	printk("\n[%s] thread[%x,%x] exit after %s process %x / cycle %d\n",
781	__FUNCTION__, client->process->pid, client->trdid,
782	process_action_str( type ), pid, cycle );
783	#endif
784
785	} // end process_sigaction()
786
787	/////////////////////////////////////////////////
788	void process_block_threads( process_t * process )
789	{
790	thread_t * target; // pointer on target thread
791	thread_t * this; // pointer on calling thread
792	uint32_t ltid; // index in process th_tbl[]
793	cxy_t owner_cxy; // target process owner cluster
794	uint32_t count; // requests counter
795	volatile uint32_t ack_count; // acknowledges counter
796
797	// get calling thread pointer
798	this = CURRENT_THREAD;
799
800	#if DEBUG_PROCESS_SIGACTION
801	pid_t pid = process->pid;
802	uint32_t cycle = (uint32_t)hal_get_cycles();
803	if( DEBUG_PROCESS_SIGACTION < cycle )
804	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
805	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
806	#endif
807
808	// check target process is an user process
809	assert( (LPID_FROM_PID( process->pid ) != 0 ),
810	"process %x is not an user process\n", process->pid );
811
812	// get target process owner cluster
813	owner_cxy = CXY_FROM_PID( process->pid );
814
815	// get lock protecting process th_tbl[]
816	rwlock_rd_acquire( &process->th_lock );
817
818	// loop on target process local threads
819	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
820	// - if the calling thread and the target thread are not running on the same
821	// core, we ask the target scheduler to acknowlege the blocking
822	// to be sure that the target thread is not running.
823	// - if the calling thread and the target thread are running on the same core,
824	// we don't need confirmation from scheduler.
825
826	for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ )
827	{
828	target = process->th_tbl[ltid];
829
830	if( target != NULL ) // thread exist
831	{
832	count++;
833
834	// set the global blocked bit in target thread descriptor.
835	thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
836
837	if( this->core->lid != target->core->lid )
838	{
839	// increment responses counter
840	hal_atomic_add( (void*)&ack_count , 1 );
841
842	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
843	thread_set_req_ack( target , (uint32_t *)&ack_count );
844
845	// force scheduling on target thread
846	dev_pic_send_ipi( local_cxy , target->core->lid );
847	}
848	}
849	}
850
851	// release lock protecting process th_tbl[]
852	rwlock_rd_release( &process->th_lock );
853
854	// wait other threads acknowledges TODO this could be improved...
855	while( 1 )
856	{
857	// exit when all scheduler acknowledges received
858	if ( ack_count == 0 ) break;
859
860	// wait 1000 cycles before retry
861	hal_fixed_delay( 1000 );
862	}
863
864	#if DEBUG_PROCESS_SIGACTION
865	cycle = (uint32_t)hal_get_cycles();
866	if( DEBUG_PROCESS_SIGACTION < cycle )
867	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
868	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
869	#endif
870
871	} // end process_block_threads()
872
873	/////////////////////////////////////////////////
874	void process_delete_threads( process_t * process,
875	xptr_t client_xp )
876	{
877	thread_t * this; // pointer on calling thread
878	thread_t * target; // local pointer on target thread
879	xptr_t target_xp; // extended pointer on target thread
880	cxy_t owner_cxy; // owner process cluster
881	uint32_t ltid; // index in process th_tbl
882	uint32_t count; // threads counter
883
884	// get calling thread pointer
885	this = CURRENT_THREAD;
886
887	// get target process owner cluster
888	owner_cxy = CXY_FROM_PID( process->pid );
889
890	#if DEBUG_PROCESS_SIGACTION
891	uint32_t cycle = (uint32_t)hal_get_cycles();
892	if( DEBUG_PROCESS_SIGACTION < cycle )
893	printk("\n[%s] thread[%x,%x] enter for process %x n cluster %x / cycle %d\n",
894	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy, cycle );
895	#endif
896
897	// check target process is an user process
898	assert( (LPID_FROM_PID( process->pid ) != 0),
899	"process %x is not an user process\n", process->pid );
900
901	// get lock protecting process th_tbl[]
902	rwlock_wr_acquire( &process->th_lock );
903
904	// loop on target process local threads
905	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
906	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
907	{
908	target = process->th_tbl[ltid];
909
910	if( target != NULL ) // valid thread
911	{
912	count++;
913	target_xp = XPTR( local_cxy , target );
914
915	// main thread and client thread should not be deleted
916	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
917	(client_xp) != target_xp ) // not client thread
918	{
919	// mark target thread for delete and block it
920	thread_delete( target_xp , process->pid , false ); // not forced
921	}
922	}
923	}
924
925	// release lock protecting process th_tbl[]
926	rwlock_wr_release( &process->th_lock );
927
928	#if DEBUG_PROCESS_SIGACTION
929	cycle = (uint32_t)hal_get_cycles();
930	if( DEBUG_PROCESS_SIGACTION < cycle )
931	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
932	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy , cycle );
933	#endif
934
935	} // end process_delete_threads()
936
937	///////////////////////////////////////////////////
938	void process_unblock_threads( process_t * process )
939	{
940	thread_t * target; // pointer on target thead
941	thread_t * this; // pointer on calling thread
942	uint32_t ltid; // index in process th_tbl
943	uint32_t count; // requests counter
944
945	// get calling thread pointer
946	this = CURRENT_THREAD;
947
948	#if DEBUG_PROCESS_SIGACTION
949	pid_t pid = process->pid;
950	uint32_t cycle = (uint32_t)hal_get_cycles();
951	if( DEBUG_PROCESS_SIGACTION < cycle )
952	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
953	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
954	#endif
955
956	// check target process is an user process
957	assert( ( LPID_FROM_PID( process->pid ) != 0 ),
958	"process %x is not an user process\n", process->pid );
959
960	// get lock protecting process th_tbl[]
961	rwlock_rd_acquire( &process->th_lock );
962
963	// loop on process threads to unblock all threads
964	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
965	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
966	{
967	target = process->th_tbl[ltid];
968
969	if( target != NULL ) // thread found
970	{
971	count++;
972
973	// reset the global blocked bit in target thread descriptor.
974	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
975	}
976	}
977
978	// release lock protecting process th_tbl[]
979	rwlock_rd_release( &process->th_lock );
980
981	#if DEBUG_PROCESS_SIGACTION
982	cycle = (uint32_t)hal_get_cycles();
983	if( DEBUG_PROCESS_SIGACTION < cycle )
984	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
985	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
986	#endif
987
988	} // end process_unblock_threads()
989
990	///////////////////////////////////////////////
991	process_t * process_get_local_copy( pid_t pid )
992	{
993	error_t error;
994	process_t * process_ptr; // local pointer on process
995	xptr_t process_xp; // extended pointer on process
996
997	cluster_t * cluster = LOCAL_CLUSTER;
998
999	#if DEBUG_PROCESS_GET_LOCAL_COPY
1000	thread_t * this = CURRENT_THREAD;
1001	uint32_t cycle = (uint32_t)hal_get_cycles();
1002	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
1003	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
1004	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
1005	#endif
1006
1007	// get lock protecting local list of processes
1008	remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1009
1010	// scan the local list of process descriptors to find the process
1011	xptr_t iter;
1012	bool_t found = false;
1013	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
1014	{
1015	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
1016	process_ptr = GET_PTR( process_xp );
1017	if( process_ptr->pid == pid )
1018	{
1019	found = true;
1020	break;
1021	}
1022	}
1023
1024	// release lock protecting local list of processes
1025	remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1026
1027	// allocate memory for a new local process descriptor
1028	// and initialise it from reference cluster if not found
1029	if( !found )
1030	{
1031	// get extended pointer on reference process descriptor
1032	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
1033
1034	assert( (ref_xp != XPTR_NULL) , "illegal pid\n" );
1035
1036	// allocate memory for local process descriptor
1037	process_ptr = process_alloc();
1038
1039	if( process_ptr == NULL ) return NULL;
1040
1041	// initialize local process descriptor copy
1042	error = process_copy_init( process_ptr , ref_xp );
1043
1044	if( error ) return NULL;
1045	}
1046
1047	#if DEBUG_PROCESS_GET_LOCAL_COPY
1048	cycle = (uint32_t)hal_get_cycles();
1049	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
1050	printk("\n[%s] thread[%x,%x] exit in cluster %x / process %x / cycle %d\n",
1051	__FUNCTION__, this->process->pid, this->trdid, local_cxy, process_ptr, cycle );
1052	#endif
1053
1054	return process_ptr;
1055
1056	} // end process_get_local_copy()
1057
1058	////////////////////////////////////////////
1059	pid_t process_get_ppid( xptr_t process_xp )
1060	{
1061	cxy_t process_cxy;
1062	process_t * process_ptr;
1063	xptr_t parent_xp;
1064	cxy_t parent_cxy;
1065	process_t * parent_ptr;
1066
1067	// get process cluster and local pointer
1068	process_cxy = GET_CXY( process_xp );
1069	process_ptr = GET_PTR( process_xp );
1070
1071	// get pointers on parent process
1072	parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
1073	parent_cxy = GET_CXY( parent_xp );
1074	parent_ptr = GET_PTR( parent_xp );
1075
1076	return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
1077	}
1078
1079	//////////////////////////////////////////////////////////////////////////////////////////
1080	// File descriptor array related functions
1081	//////////////////////////////////////////////////////////////////////////////////////////
1082
1083	///////////////////////////////////////////
1084	void process_fd_init( process_t * process )
1085	{
1086	uint32_t fd;
1087
1088	// initialize lock
1089	remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY );
1090
1091	// initialize number of open files
1092	process->fd_array.current = 0;
1093
1094	// initialize array
1095	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1096	{
1097	process->fd_array.array[fd] = XPTR_NULL;
1098	}
1099	}
1100	////////////////////////////////////////////////////
1101	error_t process_fd_register( xptr_t process_xp,
1102	xptr_t file_xp,
1103	uint32_t * fdid )
1104	{
1105	bool_t found;
1106	uint32_t id;
1107	xptr_t xp;
1108
1109	// get reference process cluster and local pointer
1110	process_t * process_ptr = GET_PTR( process_xp );
1111	cxy_t process_cxy = GET_CXY( process_xp );
1112
1113	// check client process is reference process
1114	assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->ref_xp ) ) ),
1115	"client process must be reference process\n" );
1116
1117	#if DEBUG_PROCESS_FD_REGISTER
1118	thread_t * this = CURRENT_THREAD;
1119	uint32_t cycle = (uint32_t)hal_get_cycles();
1120	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1121	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1122	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
1123	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1124	#endif
1125
1126	// build extended pointer on lock protecting reference fd_array
1127	xptr_t lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1128
1129	// take lock protecting reference fd_array
1130	remote_queuelock_acquire( lock_xp );
1131
1132	found = false;
1133
1134	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
1135	{
1136	xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) );
1137	if ( xp == XPTR_NULL )
1138	{
1139	// update reference fd_array
1140	hal_remote_s64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) , file_xp );
1141	hal_remote_atomic_add( XPTR( process_cxy , &process_ptr->fd_array.current ) , 1 );
1142
1143	// exit
1144	*fdid = id;
1145	found = true;
1146	break;
1147	}
1148	}
1149
1150	// release lock protecting fd_array
1151	remote_queuelock_release( lock_xp );
1152
1153	#if DEBUG_PROCESS_FD_REGISTER
1154	cycle = (uint32_t)hal_get_cycles();
1155	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1156	printk("\n[%s] thread[%x,%x] exit for process %x / fdid %d / cycle %d\n",
1157	__FUNCTION__, this->process->pid, this->trdid, pid, id, cycle );
1158	#endif
1159
1160	if ( !found ) return -1;
1161	else return 0;
1162
1163	} // end process_fd_register()
1164
1165	////////////////////////////////////////////////
1166	xptr_t process_fd_get_xptr( process_t * process,
1167	uint32_t fdid )
1168	{
1169	xptr_t file_xp;
1170	xptr_t lock_xp;
1171
1172	// access local copy of process descriptor
1173	file_xp = process->fd_array.array[fdid];
1174
1175	if( file_xp == XPTR_NULL )
1176	{
1177	// get reference process cluster and local pointer
1178	xptr_t ref_xp = process->ref_xp;
1179	cxy_t ref_cxy = GET_CXY( ref_xp );
1180	process_t * ref_ptr = GET_PTR( ref_xp );
1181
1182	// build extended pointer on lock protecting reference fd_array
1183	lock_xp = XPTR( ref_cxy , &ref_ptr->fd_array.lock );
1184
1185	// take lock protecting reference fd_array
1186	remote_queuelock_acquire( lock_xp );
1187
1188	// access reference process descriptor
1189	file_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) );
1190
1191	// update local fd_array if found
1192	if( file_xp != XPTR_NULL ) process->fd_array.array[fdid] = file_xp;
1193
1194	// release lock protecting reference fd_array
1195	remote_queuelock_release( lock_xp );
1196	}
1197
1198	return file_xp;
1199
1200	} // end process_fd_get_xptr()
1201
1202	///////////////////////////////////////////
1203	void process_fd_remote_copy( xptr_t dst_xp,
1204	xptr_t src_xp )
1205	{
1206	uint32_t fd;
1207	xptr_t entry;
1208
1209	// get cluster and local pointer for src fd_array
1210	cxy_t src_cxy = GET_CXY( src_xp );
1211	fd_array_t * src_ptr = GET_PTR( src_xp );
1212
1213	// get cluster and local pointer for dst fd_array
1214	cxy_t dst_cxy = GET_CXY( dst_xp );
1215	fd_array_t * dst_ptr = GET_PTR( dst_xp );
1216
1217	// get the remote lock protecting the src fd_array
1218	remote_queuelock_acquire( XPTR( src_cxy , &src_ptr->lock ) );
1219
1220	// loop on all fd_array entries
1221	for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1222	{
1223	entry = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->array[fd] ) );
1224
1225	if( entry != XPTR_NULL )
1226	{
1227	// increment file descriptor refcount
1228	vfs_file_count_up( entry );
1229
1230	// copy entry in destination process fd_array
1231	hal_remote_s64( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry );
1232	}
1233	}
1234
1235	// release lock on source process fd_array
1236	remote_queuelock_release( XPTR( src_cxy , &src_ptr->lock ) );
1237
1238	} // end process_fd_remote_copy()
1239
1240
1241	////////////////////////////////////
1242	bool_t process_fd_array_full( void )
1243	{
1244	// get extended pointer on reference process
1245	xptr_t ref_xp = CURRENT_THREAD->process->ref_xp;
1246
1247	// get reference process cluster and local pointer
1248	process_t * ref_ptr = GET_PTR( ref_xp );
1249	cxy_t ref_cxy = GET_CXY( ref_xp );
1250
1251	// get number of open file descriptors from reference fd_array
1252	uint32_t current = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) );
1253
1254	return ( current >= CONFIG_PROCESS_FILE_MAX_NR );
1255	}
1256
1257
1258	////////////////////////////////////////////////////////////////////////////////////
1259	// Thread related functions
1260	////////////////////////////////////////////////////////////////////////////////////
1261
1262	/////////////////////////////////////////////////////
1263	error_t process_register_thread( process_t * process,
1264	thread_t * thread,
1265	trdid_t * trdid )
1266	{
1267	ltid_t ltid;
1268	bool_t found = false;
1269
1270	// check arguments
1271	assert( (process != NULL) , "process argument is NULL" );
1272	assert( (thread != NULL) , "thread argument is NULL" );
1273
1274	// get the lock protecting th_tbl for all threads
1275	// but the idle thread executing kernel_init (cannot yield)
1276	if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock );
1277
1278	// scan th_tbl
1279	for( ltid = 0 ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ )
1280	{
1281	if( process->th_tbl[ltid] == NULL )
1282	{
1283	found = true;
1284	break;
1285	}
1286	}
1287
1288	if( found )
1289	{
1290	// register thread in th_tbl[]
1291	process->th_tbl[ltid] = thread;
1292	process->th_nr++;
1293
1294	// returns trdid
1295	*trdid = TRDID( local_cxy , ltid );
1296	}
1297
1298	// release the lock protecting th_tbl
1299	if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock );
1300
1301	return (found) ? 0 : 0xFFFFFFFF;
1302
1303	} // end process_register_thread()
1304
1305	///////////////////////////////////////////////////
1306	uint32_t process_remove_thread( thread_t * thread )
1307	{
1308	uint32_t count; // number of threads in local process descriptor
1309
1310	// check thread
1311	assert( (thread != NULL) , "thread argument is NULL" );
1312
1313	process_t * process = thread->process;
1314
1315	// get thread local index
1316	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
1317
1318	// get the lock protecting th_tbl[]
1319	rwlock_wr_acquire( &process->th_lock );
1320
1321	// get number of threads
1322	count = process->th_nr;
1323
1324	// check th_nr value
1325	assert( (count > 0) , "process th_nr cannot be 0" );
1326
1327	// remove thread from th_tbl[]
1328	process->th_tbl[ltid] = NULL;
1329	process->th_nr = count-1;
1330
1331	// release lock protecting th_tbl
1332	rwlock_wr_release( &process->th_lock );
1333
1334	return count;
1335
1336	} // end process_remove_thread()
1337
1338	/////////////////////////////////////////////////////////
1339	error_t process_make_fork( xptr_t parent_process_xp,
1340	xptr_t parent_thread_xp,
1341	pid_t * child_pid,
1342	thread_t ** child_thread )
1343	{
1344	process_t * process; // local pointer on child process descriptor
1345	thread_t * thread; // local pointer on child thread descriptor
1346	pid_t new_pid; // process identifier for child process
1347	pid_t parent_pid; // process identifier for parent process
1348	xptr_t ref_xp; // extended pointer on reference process
1349	xptr_t vfs_bin_xp; // extended pointer on .elf file
1350	error_t error;
1351
1352	// get cluster and local pointer for parent process
1353	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
1354	process_t * parent_process_ptr = GET_PTR( parent_process_xp );
1355
1356	// get parent process PID and extended pointer on .elf file
1357	parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid));
1358	vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
1359
1360	// get extended pointer on reference process
1361	ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
1362
1363	// check parent process is the reference process
1364	assert( (parent_process_xp == ref_xp ) ,
1365	"parent process must be the reference process" );
1366
1367	#if DEBUG_PROCESS_MAKE_FORK
1368	uint32_t cycle = (uint32_t)hal_get_cycles();
1369	thread_t * this = CURRENT_THREAD;
1370	trdid_t trdid = this->trdid;
1371	pid_t pid = this->process->pid;
1372	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1373	printk("\n[%s] thread[%x,%x] enter / cluster %x / cycle %d\n",
1374	__FUNCTION__, pid, trdid, local_cxy, cycle );
1375	#endif
1376
1377	// allocate a process descriptor
1378	process = process_alloc();
1379	if( process == NULL )
1380	{
1381	printk("\n[ERROR] in %s : cannot get process in cluster %x\n",
1382	__FUNCTION__, local_cxy );
1383	return -1;
1384	}
1385
1386	// allocate a child PID from local cluster
1387	error = cluster_pid_alloc( process , &new_pid );
1388	if( error )
1389	{
1390	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
1391	__FUNCTION__, local_cxy );
1392	process_free( process );
1393	return -1;
1394	}
1395
1396	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1397	cycle = (uint32_t)hal_get_cycles();
1398	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1399	printk("\n[%s] thread[%x,%x] allocated child_process %x / cycle %d\n",
1400	__FUNCTION__, pid, trdid, new_pid, cycle );
1401	#endif
1402
1403	// initializes child process descriptor from parent process descriptor
1404	error = process_reference_init( process,
1405	new_pid,
1406	parent_process_xp );
1407	if( error )
1408	{
1409	printk("\n[ERROR] in %s : cannot initialize child process in cluster %x\n",
1410	__FUNCTION__, local_cxy );
1411	process_free( process );
1412	return -1;
1413	}
1414
1415	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1416	cycle = (uint32_t)hal_get_cycles();
1417	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1418	printk("\n[%s] thread[%x,%x] initialized child_process %x / cycle %d\n",
1419	__FUNCTION__, pid, trdid, new_pid, cycle );
1420	#endif
1421
1422	// copy VMM from parent descriptor to child descriptor
1423	error = vmm_fork_copy( process,
1424	parent_process_xp );
1425	if( error )
1426	{
1427	printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n",
1428	__FUNCTION__, local_cxy );
1429	process_free( process );
1430	cluster_pid_release( new_pid );
1431	return -1;
1432	}
1433
1434	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1435	cycle = (uint32_t)hal_get_cycles();
1436	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1437	printk("\n[%s] thread[%x,%x] copied VMM from parent to child / cycle %d\n",
1438	__FUNCTION__, pid, trdid, cycle );
1439	#endif
1440
1441	// if parent_process is INIT, or if parent_process is the TXT owner,
1442	// the child_process becomes the owner of its TXT terminal
1443	if( (parent_pid == 1) \|\| process_txt_is_owner( parent_process_xp ) )
1444	{
1445	process_txt_set_ownership( XPTR( local_cxy , process ) );
1446
1447	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1448	cycle = (uint32_t)hal_get_cycles();
1449	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1450	printk("\n[%s] thread[%x,%x] / child takes TXT ownership / cycle %d\n",
1451	__FUNCTION__ , pid, trdid, cycle );
1452	#endif
1453
1454	}
1455
1456	// update extended pointer on .elf file
1457	process->vfs_bin_xp = vfs_bin_xp;
1458
1459	// create child thread descriptor from parent thread descriptor
1460	error = thread_user_fork( parent_thread_xp,
1461	process,
1462	&thread );
1463	if( error )
1464	{
1465	printk("\n[ERROR] in %s : cannot create thread in cluster %x\n",
1466	__FUNCTION__, local_cxy );
1467	process_free( process );
1468	cluster_pid_release( new_pid );
1469	return -1;
1470	}
1471
1472	// check main thread LTID
1473	assert( (LTID_FROM_TRDID(thread->trdid) == 0) ,
1474	"main thread must have LTID == 0" );
1475
1476	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1477	cycle = (uint32_t)hal_get_cycles();
1478	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1479	printk("\n[%s] thread[%x,%x] created main thread %x / cycle %d\n",
1480	__FUNCTION__, pid, trdid, thread, cycle );
1481	#endif
1482
1483	// set COW flag in DATA, ANON, REMOTE vsegs for parent process VMM
1484	// this includes all parnet process copies in all clusters
1485	if( parent_process_cxy == local_cxy ) // reference is local
1486	{
1487	vmm_set_cow( parent_process_ptr );
1488	}
1489	else // reference is remote
1490	{
1491	rpc_vmm_set_cow_client( parent_process_cxy,
1492	parent_process_ptr );
1493	}
1494
1495	// set COW flag in DATA, ANON, REMOTE vsegs for child process VMM
1496	vmm_set_cow( process );
1497
1498	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1499	cycle = (uint32_t)hal_get_cycles();
1500	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1501	printk("\n[%s] thread[%x,%x] set COW in parent and child / cycle %d\n",
1502	__FUNCTION__, pid, trdid, cycle );
1503	#endif
1504
1505	// get extended pointers on parent children_root, children_lock and children_nr
1506	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
1507	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
1508	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
1509
1510	// register process in parent children list
1511	remote_queuelock_acquire( children_lock_xp );
1512	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1513	hal_remote_atomic_add( children_nr_xp , 1 );
1514	remote_queuelock_release( children_lock_xp );
1515
1516	// return success
1517	*child_thread = thread;
1518	*child_pid = new_pid;
1519
1520	#if DEBUG_PROCESS_MAKE_FORK
1521	cycle = (uint32_t)hal_get_cycles();
1522	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1523	printk("\n[%s] thread[%x,%x] exit / created process %x / cycle %d\n",
1524	__FUNCTION__, pid, trdid, new_pid, cycle );
1525	#endif
1526
1527	return 0;
1528
1529	} // end process_make_fork()
1530
1531	/////////////////////////////////////////////////////
1532	error_t process_make_exec( exec_info_t * exec_info )
1533	{
1534	thread_t * thread; // local pointer on this thread
1535	process_t * process; // local pointer on this process
1536	pid_t pid; // this process identifier
1537	xptr_t ref_xp; // reference process for this process
1538	error_t error; // value returned by called functions
1539	char * path; // path to .elf file
1540	xptr_t file_xp; // extended pointer on .elf file descriptor
1541	uint32_t file_id; // file index in fd_array
1542	uint32_t args_nr; // number of main thread arguments
1543	char ** args_pointers; // array of pointers on main thread arguments
1544
1545	// get calling thread, process, pid and ref_xp
1546	thread = CURRENT_THREAD;
1547	process = thread->process;
1548	pid = process->pid;
1549	ref_xp = process->ref_xp;
1550
1551	// get relevant infos from exec_info
1552	path = exec_info->path;
1553	args_nr = exec_info->args_nr;
1554	args_pointers = exec_info->args_pointers;
1555
1556	#if DEBUG_PROCESS_MAKE_EXEC
1557	uint32_t cycle = (uint32_t)hal_get_cycles();
1558	if( local_cxy == 0x11 )
1559	printk("\n[%s] thread[%x,%x] enters for %s / cycle %d\n",
1560	__FUNCTION__, pid, thread->trdid, path, cycle );
1561	#endif
1562
1563	// open the file identified by <path>
1564	file_xp = XPTR_NULL;
1565	file_id = 0xFFFFFFFF;
1566	error = vfs_open( process->vfs_root_xp,
1567	path,
1568	ref_xp,
1569	O_RDONLY,
1570	0,
1571	&file_xp,
1572	&file_id );
1573	if( error )
1574	{
1575	printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path );
1576	return -1;
1577	}
1578
1579	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1580	cycle = (uint32_t)hal_get_cycles();
1581	if( local_cxy == 0x11 )
1582	printk("\n[%s] thread[%x,%x] opened file <%s> / cycle %d\n",
1583	__FUNCTION__, pid, thread->trdid, path, cycle );
1584	#endif
1585
1586	// delete all threads other than this main thread in all clusters
1587	process_sigaction( pid , DELETE_ALL_THREADS );
1588
1589	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1590	cycle = (uint32_t)hal_get_cycles();
1591	if( local_cxy == 0x11 )
1592	printk("\n[%s] thread[%x,%x] deleted existing threads / cycle %d\n",
1593	__FUNCTION__, pid, thread->trdid, cycle );
1594	#endif
1595
1596	// reset calling process VMM
1597	vmm_user_reset( process );
1598
1599	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1600	cycle = (uint32_t)hal_get_cycles();
1601	if( local_cxy == 0x11 )
1602	printk("\n[%s] thread[%x,%x] completed VMM reset / cycle %d\n",
1603	__FUNCTION__, pid, thread->trdid, cycle );
1604	#endif
1605
1606	// re-initialize the VMM (args/envs vsegs registration)
1607	error = vmm_user_init( process );
1608	if( error )
1609	{
1610	printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path );
1611	vfs_close( file_xp , file_id );
1612	// FIXME restore old process VMM [AG]
1613	return -1;
1614	}
1615
1616	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1617	cycle = (uint32_t)hal_get_cycles();
1618	if( local_cxy == 0x11 )
1619	printk("\n[%s] thread[%x,%x] registered args/envs vsegs / cycle %d\n",
1620	__FUNCTION__, pid, thread->trdid, cycle );
1621	#endif
1622
1623	// register code & data vsegs as well as entry-point in process VMM,
1624	// and register extended pointer on .elf file in process descriptor
1625	error = elf_load_process( file_xp , process );
1626	if( error )
1627	{
1628	printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path );
1629	vfs_close( file_xp , file_id );
1630	// FIXME restore old process VMM [AG]
1631	return -1;
1632	}
1633
1634	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1635	cycle = (uint32_t)hal_get_cycles();
1636	if( local_cxy == 0x11 )
1637	printk("\n[%s] thread[%x,%x] registered code/data vsegs / cycle %d\n",
1638	__FUNCTION__, pid, thread->trdid, cycle );
1639	#endif
1640
1641	// update the existing main thread descriptor... and jump to user code
1642	error = thread_user_exec( (void *)process->vmm.entry_point,
1643	args_nr,
1644	args_pointers );
1645	if( error )
1646	{
1647	printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path );
1648	vfs_close( file_xp , file_id );
1649	// FIXME restore old process VMM
1650	return -1;
1651	}
1652
1653	assert( false, "we should not execute this code");
1654
1655	return 0;
1656
1657	} // end process_make_exec()
1658
1659
1660	////////////////////////////////////////////////
1661	void process_zero_create( process_t * process,
1662	boot_info_t * info )
1663	{
1664	error_t error;
1665	pid_t pid;
1666
1667	#if DEBUG_PROCESS_ZERO_CREATE
1668	uint32_t cycle = (uint32_t)hal_get_cycles();
1669	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1670	printk("\n[%s] enter / cluster %x / cycle %d\n",
1671	__FUNCTION__, local_cxy, cycle );
1672	#endif
1673
1674	// get pointer on VMM
1675	vmm_t * vmm = &process->vmm;
1676
1677	// get PID from local cluster manager for this kernel process
1678	error = cluster_pid_alloc( process , &pid );
1679
1680	if( error \|\| (LPID_FROM_PID( pid ) != 0) )
1681	{
1682	printk("\n[PANIC] in %s : cannot get valid PID in cluster %x / PID = %x\n",
1683	__FUNCTION__ , local_cxy, pid );
1684	hal_core_sleep();
1685	}
1686
1687	// initialize PID, REF_XP, PARENT_XP, and STATE
1688	// the kernel process_zero is its own parent_process,
1689	// reference_process, and owner_process, and cannot be killed...
1690	process->pid = pid;
1691	process->ref_xp = XPTR( local_cxy , process );
1692	process->owner_xp = XPTR( local_cxy , process );
1693	process->parent_xp = XPTR( local_cxy , process );
1694	process->term_state = 0;
1695
1696	// initilise VSL as empty
1697	vmm->vsegs_nr = 0;
1698	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
1699
1700	// initialise GPT as empty
1701	error = hal_gpt_create( &vmm->gpt );
1702	if( error )
1703	{
1704	printk("\n[PANIC] in %s : cannot create empty GPT\n", __FUNCTION__ );
1705	hal_core_sleep();
1706	}
1707
1708	// initialize VSL and GPT locks
1709	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
1710	remote_rwlock_init( XPTR( local_cxy , &vmm->gpt_lock ) , LOCK_VMM_GPT );
1711
1712	// create kernel vsegs in GPT and VSL, as required by the hardware architecture
1713	error = hal_vmm_kernel_init( info );
1714	if( error )
1715	{
1716	printk("\n[PANIC] in %s : cannot create kernel vsegs in VMM\n", __FUNCTION__ );
1717	hal_core_sleep();
1718	}
1719
1720	// reset th_tbl[] array and associated fields
1721	uint32_t i;
1722	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
1723	{
1724	process->th_tbl[i] = NULL;
1725	}
1726	process->th_nr = 0;
1727	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
1728
1729
1730	// reset children list as empty
1731	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
1732	process->children_nr = 0;
1733	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ),
1734	LOCK_PROCESS_CHILDREN );
1735
1736	// register kernel process in cluster manager local_list
1737	cluster_process_local_link( process );
1738
1739	hal_fence();
1740
1741	#if DEBUG_PROCESS_ZERO_CREATE
1742	cycle = (uint32_t)hal_get_cycles();
1743	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1744	printk("\n[%s] exit / cluster %x / cycle %d\n",
1745	__FUNCTION__, local_cxy, cycle );
1746	#endif
1747
1748	} // end process_zero_create()
1749
1750	////////////////////////////////
1751	void process_init_create( void )
1752	{
1753	process_t * process; // local pointer on process descriptor
1754	pid_t pid; // process_init identifier
1755	thread_t * thread; // local pointer on main thread
1756	pthread_attr_t attr; // main thread attributes
1757	lid_t lid; // selected core local index for main thread
1758	xptr_t file_xp; // extended pointer on .elf file descriptor
1759	uint32_t file_id; // file index in fd_array
1760	error_t error;
1761
1762	#if DEBUG_PROCESS_INIT_CREATE
1763	thread_t * this = CURRENT_THREAD;
1764	uint32_t cycle = (uint32_t)hal_get_cycles();
1765	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1766	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
1767	__FUNCTION__, this->process->pid, this->trdid, cycle );
1768	#endif
1769
1770	// allocates memory for process descriptor from local cluster
1771	process = process_alloc();
1772	if( process == NULL )
1773	{
1774	printk("\n[PANIC] in %s : cannot allocate process\n", __FUNCTION__ );
1775	hal_core_sleep();
1776	}
1777
1778	// set the CWD and VFS_ROOT fields in process descriptor
1779	process->cwd_xp = process_zero.vfs_root_xp;
1780	process->vfs_root_xp = process_zero.vfs_root_xp;
1781
1782	// get PID from local cluster
1783	error = cluster_pid_alloc( process , &pid );
1784	if( error )
1785	{
1786	printk("\n[PANIC] in %s : cannot allocate PID\n", __FUNCTION__ );
1787	hal_core_sleep();
1788	}
1789	if( pid != 1 )
1790	{
1791	printk("\n[PANIC] in %s : process PID must be 0x1\n", __FUNCTION__ );
1792	hal_core_sleep();
1793	}
1794
1795	// initialize process descriptor / parent is local process_zero
1796	error = process_reference_init( process,
1797	pid,
1798	XPTR( local_cxy , &process_zero ) );
1799	if( error )
1800	{
1801	printk("\n[PANIC] in %s : cannot initialize process\n", __FUNCTION__ );
1802	hal_core_sleep();
1803	}
1804
1805	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1806	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1807	printk("\n[%s] thread[%x,%x] initialized process descriptor\n",
1808	__FUNCTION__, this->process->pid, this->trdid );
1809	#endif
1810
1811	// open the file identified by CONFIG_PROCESS_INIT_PATH
1812	file_xp = XPTR_NULL;
1813	file_id = -1;
1814	error = vfs_open( process->vfs_root_xp,
1815	CONFIG_PROCESS_INIT_PATH,
1816	XPTR( local_cxy , process ),
1817	O_RDONLY,
1818	0,
1819	&file_xp,
1820	&file_id );
1821	if( error )
1822	{
1823	printk("\n[PANIC] in %s : cannot open file <%s>\n",
1824	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
1825	hal_core_sleep();
1826	}
1827
1828	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1829	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1830	printk("\n[%s] thread[%x,%x] open .elf file decriptor\n",
1831	__FUNCTION__, this->process->pid, this->trdid );
1832	#endif
1833
1834	// register "code" and "data" vsegs as well as entry-point
1835	// in process VMM, using information contained in the elf file.
1836	error = elf_load_process( file_xp , process );
1837
1838	if( error )
1839	{
1840	printk("\n[PANIC] in %s : cannot access file <%s>\n",
1841	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
1842	hal_core_sleep();
1843	}
1844
1845
1846	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1847	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1848	printk("\n[%s] thread[%x,%x] registered code/data vsegs in VMM\n",
1849	__FUNCTION__, this->process->pid, this->trdid );
1850	#endif
1851
1852	#if (DEBUG_PROCESS_INIT_CREATE & 1)
1853	hal_vmm_display( process , true );
1854	#endif
1855
1856	// get extended pointers on process_zero children_root, children_lock
1857	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
1858	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
1859
1860	// take lock protecting kernel process children list
1861	remote_queuelock_acquire( children_lock_xp );
1862
1863	// register process INIT in parent local process_zero
1864	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1865	hal_atomic_add( &process_zero.children_nr , 1 );
1866
1867	// release lock protecting kernel process children list
1868	remote_queuelock_release( children_lock_xp );
1869
1870	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1871	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1872	printk("\n[%s] thread[%x,%x] registered init process in parent\n",
1873	__FUNCTION__, this->process->pid, this->trdid );
1874	#endif
1875
1876	// select a core in local cluster to execute the main thread
1877	lid = cluster_select_local_core();
1878
1879	// initialize pthread attributes for main thread
1880	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
1881	attr.cxy = local_cxy;
1882	attr.lid = lid;
1883
1884	// create and initialize thread descriptor
1885	error = thread_user_create( pid,
1886	(void *)process->vmm.entry_point,
1887	NULL,
1888	&attr,
1889	&thread );
1890
1891	if( error )
1892	{
1893	printk("\n[PANIC] in %s : cannot create main thread\n", __FUNCTION__ );
1894	hal_core_sleep();
1895	}
1896	if( thread->trdid != 0 )
1897	{
1898	printk("\n[PANIC] in %s : bad main thread trdid\n", __FUNCTION__ );
1899	hal_core_sleep();
1900	}
1901
1902	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1903	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1904	printk("\n[%s] thread[%x,%x] created main thread\n",
1905	__FUNCTION__, this->process->pid, this->trdid );
1906	#endif
1907
1908	// activate thread
1909	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1910
1911	hal_fence();
1912
1913	#if DEBUG_PROCESS_INIT_CREATE
1914	cycle = (uint32_t)hal_get_cycles();
1915	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1916	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
1917	__FUNCTION__, this->process->pid, this->trdid, cycle );
1918	#endif
1919
1920	} // end process_init_create()
1921
1922	/////////////////////////////////////////
1923	void process_display( xptr_t process_xp )
1924	{
1925	process_t * process_ptr;
1926	cxy_t process_cxy;
1927
1928	xptr_t parent_xp; // extended pointer on parent process
1929	process_t * parent_ptr;
1930	cxy_t parent_cxy;
1931
1932	xptr_t owner_xp; // extended pointer on owner process
1933	process_t * owner_ptr;
1934	cxy_t owner_cxy;
1935
1936	pid_t pid;
1937	pid_t ppid;
1938	lpid_t lpid;
1939	uint32_t state;
1940	uint32_t th_nr;
1941
1942	xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor
1943	xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev
1944	chdev_t * txt_chdev_ptr;
1945	cxy_t txt_chdev_cxy;
1946	xptr_t txt_owner_xp; // extended pointer on TXT owner process
1947
1948	xptr_t elf_file_xp; // extended pointer on .elf file
1949	cxy_t elf_file_cxy;
1950	vfs_file_t * elf_file_ptr;
1951	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
1952
1953	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
1954	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
1955
1956	// get cluster and local pointer on process
1957	process_ptr = GET_PTR( process_xp );
1958	process_cxy = GET_CXY( process_xp );
1959
1960	// get process PID, LPID, and state
1961	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
1962	lpid = LPID_FROM_PID( pid );
1963	state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) );
1964
1965	// get process PPID
1966	parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
1967	parent_cxy = GET_CXY( parent_xp );
1968	parent_ptr = GET_PTR( parent_xp );
1969	ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
1970
1971	// get number of threads
1972	th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) );
1973
1974	// get pointers on owner process descriptor
1975	owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) );
1976	owner_cxy = GET_CXY( owner_xp );
1977	owner_ptr = GET_PTR( owner_xp );
1978
1979	// get process TXT name and .elf name
1980	if( lpid ) // user process
1981	{
1982
1983	// get extended pointer on file descriptor associated to TXT_RX
1984	txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) );
1985
1986	assert( (txt_file_xp != XPTR_NULL) ,
1987	"process must be attached to one TXT terminal" );
1988
1989	// get TXT_RX chdev pointers
1990	txt_chdev_xp = chdev_from_file( txt_file_xp );
1991	txt_chdev_cxy = GET_CXY( txt_chdev_xp );
1992	txt_chdev_ptr = GET_PTR( txt_chdev_xp );
1993
1994	// get TXT_RX name and ownership
1995	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
1996	XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) );
1997
1998	txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy,
1999	&txt_chdev_ptr->ext.txt.owner_xp ) );
2000
2001	// get process .elf name
2002	elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
2003	elf_file_cxy = GET_CXY( elf_file_xp );
2004	elf_file_ptr = GET_PTR( elf_file_xp );
2005	elf_inode_ptr = hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
2006	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
2007	}
2008	else // kernel process_zero
2009	{
2010	// TXT name and .elf name are not registered in kernel process_zero
2011	strcpy( txt_name , "txt0_rx" );
2012	txt_owner_xp = process_xp;
2013	strcpy( elf_name , "kernel.elf" );
2014	}
2015
2016	// display process info
2017	if( txt_owner_xp == process_xp )
2018	{
2019	nolock_printk("PID %X \| %s (FG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2020	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2021	}
2022	else
2023	{
2024	nolock_printk("PID %X \| %s (BG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2025	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2026	}
2027	} // end process_display()
2028
2029
2030	////////////////////////////////////////////////////////////////////////////////////////
2031	// Terminals related functions
2032	////////////////////////////////////////////////////////////////////////////////////////
2033
2034	//////////////////////////////////
2035	uint32_t process_txt_alloc( void )
2036	{
2037	uint32_t index; // TXT terminal index
2038	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2039	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2040	cxy_t chdev_cxy; // TXT_RX chdev cluster
2041	xptr_t root_xp; // extended pointer on owner field in chdev
2042
2043	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
2044	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
2045	{
2046	// get pointers on TXT_RX[index]
2047	chdev_xp = chdev_dir.txt_rx[index];
2048	chdev_cxy = GET_CXY( chdev_xp );
2049	chdev_ptr = GET_PTR( chdev_xp );
2050
2051	// get extended pointer on root of attached process
2052	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2053
2054	// return free TXT index if found
2055	if( xlist_is_empty( root_xp ) ) return index;
2056	}
2057
2058	assert( false , "no free TXT terminal found" );
2059
2060	return -1;
2061
2062	} // end process_txt_alloc()
2063
2064	/////////////////////////////////////////////
2065	void process_txt_attach( process_t * process,
2066	uint32_t txt_id )
2067	{
2068	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2069	cxy_t chdev_cxy; // TXT_RX chdev cluster
2070	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2071	xptr_t root_xp; // extended pointer on list root in chdev
2072	xptr_t lock_xp; // extended pointer on list lock in chdev
2073
2074	// check process is in owner cluster
2075	assert( (CXY_FROM_PID( process->pid ) == local_cxy) ,
2076	"process descriptor not in owner cluster" );
2077
2078	// check terminal index
2079	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2080	"illegal TXT terminal index" );
2081
2082	// get pointers on TXT_RX[txt_id] chdev
2083	chdev_xp = chdev_dir.txt_rx[txt_id];
2084	chdev_cxy = GET_CXY( chdev_xp );
2085	chdev_ptr = GET_PTR( chdev_xp );
2086
2087	// get extended pointer on root & lock of attached process list
2088	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2089	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2090
2091	// get lock protecting list of processes attached to TXT
2092	remote_busylock_acquire( lock_xp );
2093
2094	// insert process in attached process list
2095	xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) );
2096
2097	// release lock protecting list of processes attached to TXT
2098	remote_busylock_release( lock_xp );
2099
2100	#if DEBUG_PROCESS_TXT
2101	thread_t * this = CURRENT_THREAD;
2102	uint32_t cycle = (uint32_t)hal_get_cycles();
2103	if( DEBUG_PROCESS_TXT < cycle )
2104	printk("\n[%s] thread[%x,%x] attached process %x to TXT %d / cycle %d\n",
2105	__FUNCTION__, this->process->pid, this->trdid, process->pid, txt_id , cycle );
2106	#endif
2107
2108	} // end process_txt_attach()
2109
2110	/////////////////////////////////////////////
2111	void process_txt_detach( xptr_t process_xp )
2112	{
2113	process_t * process_ptr; // local pointer on process in owner cluster
2114	cxy_t process_cxy; // process owner cluster
2115	pid_t process_pid; // process identifier
2116	xptr_t file_xp; // extended pointer on stdin file
2117	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2118	cxy_t chdev_cxy; // TXT_RX chdev cluster
2119	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2120	xptr_t lock_xp; // extended pointer on list lock in chdev
2121
2122	// get process cluster, local pointer, and PID
2123	process_cxy = GET_CXY( process_xp );
2124	process_ptr = GET_PTR( process_xp );
2125	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2126
2127	// check process descriptor in owner cluster
2128	assert( (CXY_FROM_PID( process_pid ) == process_cxy ) ,
2129	"process descriptor not in owner cluster" );
2130
2131	// release TXT ownership (does nothing if not TXT owner)
2132	process_txt_transfer_ownership( process_xp );
2133
2134	// get extended pointer on process stdin pseudo file
2135	file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2136
2137	// get pointers on TXT_RX chdev
2138	chdev_xp = chdev_from_file( file_xp );
2139	chdev_cxy = GET_CXY( chdev_xp );
2140	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
2141
2142	// get extended pointer on lock protecting attached process list
2143	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2144
2145	// get lock protecting list of processes attached to TXT
2146	remote_busylock_acquire( lock_xp );
2147
2148	// unlink process from attached process list
2149	xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) );
2150
2151	// release lock protecting list of processes attached to TXT
2152	remote_busylock_release( lock_xp );
2153
2154	#if DEBUG_PROCESS_TXT
2155	thread_t * this = CURRENT_THREAD;
2156	uint32_t cycle = (uint32_t)hal_get_cycles();
2157	uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
2158	if( DEBUG_PROCESS_TXT < cycle )
2159	printk("\n[%s] thread[%x,%x] detached process %x from TXT%d / cycle %d\n",
2160	__FUNCTION__, this->process->pid, this->trdid, process_pid, txt_id, cycle );
2161	#endif
2162
2163	} // end process_txt_detach()
2164
2165	///////////////////////////////////////////////////
2166	void process_txt_set_ownership( xptr_t process_xp )
2167	{
2168	process_t * process_ptr;
2169	cxy_t process_cxy;
2170	pid_t process_pid;
2171	xptr_t file_xp;
2172	xptr_t txt_xp;
2173	chdev_t * txt_ptr;
2174	cxy_t txt_cxy;
2175
2176	// get pointers on process in owner cluster
2177	process_cxy = GET_CXY( process_xp );
2178	process_ptr = GET_PTR( process_xp );
2179	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2180
2181	// check owner cluster
2182	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2183	"process descriptor not in owner cluster" );
2184
2185	// get extended pointer on stdin pseudo file
2186	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2187
2188	// get pointers on TXT chdev
2189	txt_xp = chdev_from_file( file_xp );
2190	txt_cxy = GET_CXY( txt_xp );
2191	txt_ptr = GET_PTR( txt_xp );
2192
2193	// set owner field in TXT chdev
2194	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
2195
2196	#if DEBUG_PROCESS_TXT
2197	thread_t * this = CURRENT_THREAD;
2198	uint32_t cycle = (uint32_t)hal_get_cycles();
2199	uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2200	if( DEBUG_PROCESS_TXT < cycle )
2201	printk("\n[%s] thread[%x,%x] give TXT%d ownership to process %x / cycle %d\n",
2202	__FUNCTION__, this->process->pid, this->trdid, txt_id, process_pid, cycle );
2203	#endif
2204
2205	} // end process_txt_set ownership()
2206
2207	////////////////////////////////////////////////////////
2208	void process_txt_transfer_ownership( xptr_t process_xp )
2209	{
2210	process_t * process_ptr; // local pointer on process releasing ownership
2211	cxy_t process_cxy; // process cluster
2212	pid_t process_pid; // process identifier
2213	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
2214	xptr_t txt_xp; // extended pointer on TXT_RX chdev
2215	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
2216	cxy_t txt_cxy; // cluster of TXT_RX chdev
2217	uint32_t txt_id; // TXT_RX channel
2218	xptr_t owner_xp; // extended pointer on current TXT_RX owner
2219	xptr_t root_xp; // extended pointer on root of attached process list
2220	xptr_t lock_xp; // extended pointer on lock protecting attached process list
2221	xptr_t iter_xp; // iterator for xlist
2222	xptr_t current_xp; // extended pointer on current process
2223	bool_t found;
2224
2225	#if DEBUG_PROCESS_TXT
2226	thread_t * this = CURRENT_THREAD;
2227	uint32_t cycle;
2228	#endif
2229
2230	// get pointers on target process
2231	process_cxy = GET_CXY( process_xp );
2232	process_ptr = GET_PTR( process_xp );
2233	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2234
2235	// check owner cluster
2236	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2237	"process descriptor not in owner cluster" );
2238
2239	// get extended pointer on stdin pseudo file
2240	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2241
2242	// get pointers on TXT chdev
2243	txt_xp = chdev_from_file( file_xp );
2244	txt_cxy = GET_CXY( txt_xp );
2245	txt_ptr = GET_PTR( txt_xp );
2246
2247	// get relevant infos from chdev descriptor
2248	owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2249	txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2250
2251	// transfer ownership only if target process is the TXT owner
2252	if( (owner_xp == process_xp) && (txt_id > 0) )
2253	{
2254	// get extended pointers on root and lock of attached processes list
2255	root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root );
2256	lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock );
2257
2258	if( process_get_ppid( process_xp ) != 1 ) // target process is not KSH
2259	{
2260	// get lock
2261	remote_busylock_acquire( lock_xp );
2262
2263	// scan attached process list to find KSH process
2264	found = false;
2265	for( iter_xp = hal_remote_l64( root_xp ) ;
2266	(iter_xp != root_xp) && (found == false) ;
2267	iter_xp = hal_remote_l64( iter_xp ) )
2268	{
2269	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2270
2271	if( process_get_ppid( current_xp ) == 1 ) // current is KSH
2272	{
2273	// set owner field in TXT chdev
2274	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2275
2276	#if DEBUG_PROCESS_TXT
2277	cycle = (uint32_t)hal_get_cycles();
2278	if( DEBUG_PROCESS_TXT < cycle )
2279	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to KSH / cycle %d\n",
2280	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2281	#endif
2282	found = true;
2283	}
2284	}
2285
2286	// release lock
2287	remote_busylock_release( lock_xp );
2288
2289	// It must exist a KSH process for each user TXT channel
2290	assert( (found == true), "KSH process not found for TXT%d", txt_id );
2291
2292	}
2293	else // target process is KSH
2294	{
2295	// get lock
2296	remote_busylock_acquire( lock_xp );
2297
2298	// scan attached process list to find another process
2299	found = false;
2300	for( iter_xp = hal_remote_l64( root_xp ) ;
2301	(iter_xp != root_xp) && (found == false) ;
2302	iter_xp = hal_remote_l64( iter_xp ) )
2303	{
2304	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2305
2306	if( current_xp != process_xp ) // current is not KSH
2307	{
2308	// set owner field in TXT chdev
2309	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2310
2311	#if DEBUG_PROCESS_TXT
2312	cycle = (uint32_t)hal_get_cycles();
2313	cxy_t current_cxy = GET_CXY( current_xp );
2314	process_t * current_ptr = GET_PTR( current_xp );
2315	uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
2316	if( DEBUG_PROCESS_TXT < cycle )
2317	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to process %x / cycle %d\n",
2318	__FUNCTION__,this->process->pid, this->trdid, txt_id, new_pid, cycle );
2319	#endif
2320	found = true;
2321	}
2322	}
2323
2324	// release lock
2325	remote_busylock_release( lock_xp );
2326
2327	// no more owner for TXT if no other process found
2328	if( found == false )
2329	{
2330	// set owner field in TXT chdev
2331	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL );
2332
2333	#if DEBUG_PROCESS_TXT
2334	cycle = (uint32_t)hal_get_cycles();
2335	if( DEBUG_PROCESS_TXT < cycle )
2336	printk("\n[%s] thread[%x,%x] released TXT%d (no attached process) / cycle %d\n",
2337	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2338	#endif
2339	}
2340	}
2341	}
2342	else
2343	{
2344
2345	#if DEBUG_PROCESS_TXT
2346	cycle = (uint32_t)hal_get_cycles();
2347	if( DEBUG_PROCESS_TXT < cycle )
2348	printk("\n[%s] thread[%x,%x] does nothing for process %x (not TXT owner) / cycle %d\n",
2349	__FUNCTION__, this->process->pid, this->trdid, process_pid, cycle );
2350	#endif
2351
2352	}
2353
2354	} // end process_txt_transfer_ownership()
2355
2356
2357	////////////////////////////////////////////////
2358	bool_t process_txt_is_owner( xptr_t process_xp )
2359	{
2360	// get local pointer and cluster of process in owner cluster
2361	cxy_t process_cxy = GET_CXY( process_xp );
2362	process_t * process_ptr = GET_PTR( process_xp );
2363
2364	// check calling thread execute in target process owner cluster
2365	pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2366	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2367	"process descriptor not in owner cluster" );
2368
2369	// get extended pointer on stdin pseudo file
2370	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2371
2372	// get pointers on TXT chdev
2373	xptr_t txt_xp = chdev_from_file( file_xp );
2374	cxy_t txt_cxy = GET_CXY( txt_xp );
2375	chdev_t * txt_ptr = GET_PTR( txt_xp );
2376
2377	// get extended pointer on TXT_RX owner process
2378	xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2379
2380	return (process_xp == owner_xp);
2381
2382	} // end process_txt_is_owner()
2383
2384	////////////////////////////////////////////////
2385	xptr_t process_txt_get_owner( uint32_t channel )
2386	{
2387	xptr_t txt_rx_xp = chdev_dir.txt_rx[channel];
2388	cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp );
2389	chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp );
2390
2391	return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) );
2392
2393	} // end process_txt_get_owner()
2394
2395	///////////////////////////////////////////
2396	void process_txt_display( uint32_t txt_id )
2397	{
2398	xptr_t chdev_xp;
2399	cxy_t chdev_cxy;
2400	chdev_t * chdev_ptr;
2401	xptr_t root_xp;
2402	xptr_t lock_xp;
2403	xptr_t current_xp;
2404	xptr_t iter_xp;
2405	cxy_t txt0_cxy;
2406	chdev_t * txt0_ptr;
2407	xptr_t txt0_xp;
2408	xptr_t txt0_lock_xp;
2409
2410	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2411	"illegal TXT terminal index" );
2412
2413	// get pointers on TXT0 chdev
2414	txt0_xp = chdev_dir.txt_tx[0];
2415	txt0_cxy = GET_CXY( txt0_xp );
2416	txt0_ptr = GET_PTR( txt0_xp );
2417
2418	// get extended pointer on TXT0 lock
2419	txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
2420
2421	// get pointers on TXT_RX[txt_id] chdev
2422	chdev_xp = chdev_dir.txt_rx[txt_id];
2423	chdev_cxy = GET_CXY( chdev_xp );
2424	chdev_ptr = GET_PTR( chdev_xp );
2425
2426	// get extended pointer on root & lock of attached process list
2427	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2428	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2429
2430	// get lock on attached process list
2431	remote_busylock_acquire( lock_xp );
2432
2433	// get TXT0 lock in busy waiting mode
2434	remote_busylock_acquire( txt0_lock_xp );
2435
2436	// display header
2437	nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n",
2438	txt_id , (uint32_t)hal_get_cycles() );
2439
2440	// scan attached process list
2441	XLIST_FOREACH( root_xp , iter_xp )
2442	{
2443	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2444	process_display( current_xp );
2445	}
2446
2447	// release TXT0 lock in busy waiting mode
2448	remote_busylock_release( txt0_lock_xp );
2449
2450	// release lock on attached process list
2451	remote_busylock_release( lock_xp );
2452
2453	} // end process_txt_display

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source: trunk/kernel/kern/process.c @ 627

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