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process.c

Last change on this file was 683, checked in by alain, 4 years ago
All modifications required to support the <tcp_chat> application including error recovery in case of packet loss.A
File size: 107.4 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 (2016,2017,2018,2019,2020)
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 <ksocket.h>
44	#include <list.h>
45	#include <string.h>
46	#include <scheduler.h>
47	#include <busylock.h>
48	#include <queuelock.h>
49	#include <remote_queuelock.h>
50	#include <rwlock.h>
51	#include <remote_rwlock.h>
52	#include <dqdt.h>
53	#include <cluster.h>
54	#include <ppm.h>
55	#include <boot_info.h>
56	#include <process.h>
57	#include <elf.h>
58	#include <syscalls.h>
59	#include <shared_syscalls.h>
60
61	//////////////////////////////////////////////////////////////////////////////////////////
62	// Extern global variables
63	//////////////////////////////////////////////////////////////////////////////////////////
64
65	extern process_t process_zero; // allocated in kernel_init.c
66	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
67
68	//////////////////////////////////////////////////////////////////////////////////////////
69	// Process initialisation related functions
70	//////////////////////////////////////////////////////////////////////////////////////////
71
72	////////////////////////////////////////////////////
73	error_t process_reference_init( process_t * process,
74	pid_t pid,
75	xptr_t parent_xp )
76	{
77	error_t error;
78	xptr_t process_xp;
79	cxy_t parent_cxy;
80	process_t * parent_ptr;
81	xptr_t stdin_xp;
82	xptr_t stdout_xp;
83	xptr_t stderr_xp;
84	uint32_t stdin_id;
85	uint32_t stdout_id;
86	uint32_t stderr_id;
87	uint32_t txt_id;
88	char rx_path[40];
89	char tx_path[40];
90	pid_t parent_pid;
91	vmm_t * vmm;
92
93	#if DEBUG_PROCESS_REFERENCE_INIT \|\| DEBUG_PROCESS_ERROR
94	thread_t * this = CURRENT_THREAD;
95	uint32_t cycle = (uint32_t)hal_get_cycles();
96	#endif
97
98	// build extended pointer on reference process
99	process_xp = XPTR( local_cxy , process );
100
101	// get pointer on process vmm
102	vmm = &process->vmm;
103
104	// get parent process cluster and local pointer
105	parent_cxy = GET_CXY( parent_xp );
106	parent_ptr = GET_PTR( parent_xp );
107
108	// get parent_pid
109	parent_pid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
110
111	#if DEBUG_PROCESS_REFERENCE_INIT
112	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
113	printk("\n[%s] thread[%x,%x] enter to initialize process %x / cycle %d\n",
114	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
115	#endif
116
117	// initialize pid, ref_xp, parent_xp, owner_xp, term_state fields
118	process->pid = pid;
119	process->ref_xp = XPTR( local_cxy , process );
120	process->owner_xp = XPTR( local_cxy , process );
121	process->parent_xp = parent_xp;
122	process->term_state = 0;
123
124	// initialize VFS root inode and CWD inode
125	process->vfs_root_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->vfs_root_xp ) );
126	process->cwd_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->cwd_xp ) );
127
128	// initialize VSL as empty
129	vmm->vsegs_nr = 0;
130	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
131
132	// create an empty GPT as required by the architecture
133	error = hal_gpt_create( &vmm->gpt );
134	if( error )
135	{
136
137	#if DEBUG_PROCESS_ERROR
138	printk("\n[ERROR] in %s : thread[%x,%x] cannot create empty GPT / cycle %d\n",
139	__FUNCTION__, this->process->pid, this->trdid, cycle );
140	#endif
141	return -1;
142	}
143
144	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
145	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
146	printk("\n[%s] thread[%x,%x] created empty GPT for process %x\n",
147	__FUNCTION__, parent_pid, this->trdid, pid );
148	#endif
149
150	// initialize VSL lock
151	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
152
153	// register kernel vsegs in user process VMM as required by the architecture
154	error = hal_vmm_kernel_update( process );
155	if( error )
156	{
157
158	#if DEBUG_PROCESS_ERROR
159	printk("\n[ERROR] in %s : thread[%x,%x] cannot register kernel vsegs in VMM / cycle %d\n",
160	__FUNCTION__, this->process->pid, this->trdid, cycle );
161	#endif
162	printk("\n[ERROR] in %s : cannot register kernel vsegs in VMM\n", __FUNCTION__ );
163	return -1;
164	}
165
166	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
167	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
168	printk("\n[%s] thread[%x,%x] registered kernel vsegs in VSL for process %x\n",
169	__FUNCTION__, parent_pid, this->trdid, pid );
170	#endif
171
172	// create "args" and "envs" vsegs
173	// create "stacks" and "mmap" vsegs allocators
174	// initialize locks protecting GPT and VSL
175	error = vmm_user_init( process );
176	if( error )
177	{
178	printk("\n[ERROR] in %s : cannot register user vsegs in VMM\n", __FUNCTION__ );
179	return -1;
180	}
181
182	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
183	cycle = (uint32_t)hal_get_cycles();
184	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
185	printk("\n[%s] thread[%x,%x] initialized vmm for process %x\n",
186	__FUNCTION__, parent_pid, this->trdid, pid );
187	#endif
188
189	// initialize fd_array as empty
190	process_fd_init( process );
191
192	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
193	if( (pid == 1) \|\| (parent_pid == 1) ) // INIT or KSH process
194	{
195	// select a TXT channel
196	if( pid == 1 ) txt_id = 0; // INIT
197	else txt_id = process_txt_alloc(); // KSH
198
199	// attach process to TXT
200	process_txt_attach( process_xp , txt_id );
201
202	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
203	cycle = (uint32_t)hal_get_cycles();
204	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
205	printk("\n[%s] thread[%x,%x] / process %x attached to TXT%d / cycle %d\n",
206	__FUNCTION__, parent_pid, this->trdid, pid, txt_id, cycle );
207	#endif
208	// build path to TXT_RX[i] and TXT_TX[i] chdevs
209	snprintk( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
210	snprintk( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
211
212	// create stdin pseudo file
213	error = vfs_open( process->vfs_root_xp,
214	rx_path,
215	process_xp,
216	O_RDONLY,
217	0, // FIXME chmod
218	&stdin_xp,
219	&stdin_id );
220	if( error )
221	{
222
223	#if DEBUG_PROCESS_ERROR
224	printk("\n[ERROR] in %s : thread[%x,%x] cannot open stdin pseudo file / cycle %d\n",
225	__FUNCTION__, this->process->pid, this->trdid, cycle );
226	#endif
227	return -1;
228	}
229
230	assert( __FUNCTION__, (stdin_id == 0) , "stdin index must be 0" );
231
232	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
233	cycle = (uint32_t)hal_get_cycles();
234	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
235	printk("\n[%s] thread[%x,%x] / stdin open for process %x / cycle %d\n",
236	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
237	#endif
238
239	// create stdout pseudo file
240	error = vfs_open( process->vfs_root_xp,
241	tx_path,
242	process_xp,
243	O_WRONLY,
244	0, // FIXME chmod
245	&stdout_xp,
246	&stdout_id );
247	if( error )
248	{
249
250	#if DEBUG_PROCESS_ERROR
251	printk("\n[ERROR] in %s : thread[%x,%x] cannot open stdout pseudo file / cycle %d\n",
252	__FUNCTION__, this->process->pid, this->trdid, cycle );
253	#endif
254	return -1;
255	}
256
257	assert( __FUNCTION__, (stdout_id == 1) , "stdout index must be 1" );
258
259	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
260	cycle = (uint32_t)hal_get_cycles();
261	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
262	printk("\n[%s] thread[%x,%x] / stdout open for process %x / cycle %d\n",
263	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
264	#endif
265
266	// create stderr pseudo file
267	error = vfs_open( process->vfs_root_xp,
268	tx_path,
269	process_xp,
270	O_WRONLY,
271	0, // FIXME chmod
272	&stderr_xp,
273	&stderr_id );
274	if( error )
275	{
276
277	#if DEBUG_PROCESS_ERROR
278	printk("\n[ERROR] in %s : thread[%x,%x] cannot open stderr pseudo file / cycle %d\n",
279	__FUNCTION__, this->process->pid, this->trdid, cycle );
280	#endif
281	return -1;
282	}
283
284	assert( __FUNCTION__, (stderr_id == 2) , "stderr index must be 2" );
285
286	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
287	cycle = (uint32_t)hal_get_cycles();
288	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
289	printk("\n[%s] thread[%x,%x] / stderr open for process %x / cycle %d\n",
290	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
291	#endif
292
293	}
294	else // normal user process
295	{
296	// get parent process TXT index
297	txt_id = process_txt_get_index( parent_xp );
298
299	// attach child process to same TXT terminal as parent
300	process_txt_attach( process_xp , txt_id );
301
302	// recreate all open files from parent process fd_array to child process fd_array
303	error = process_fd_replicate( process_xp , parent_xp );
304
305	if( error )
306	{
307
308	#if DEBUG_PROCESS_ERROR
309	printk("\n[ERROR] in %s : thread[%x,%x] cannot replicate fd_array / cycle %d\n",
310	__FUNCTION__, this->process->pid, this->trdid, cycle );
311	#endif
312	return -1;
313	}
314
315	}
316
317	// initialize lock protecting CWD changes
318	remote_busylock_init( XPTR( local_cxy , &process->cwd_lock ), LOCK_PROCESS_CWD );
319
320	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
321	cycle = (uint32_t)hal_get_cycles();
322	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
323	printk("\n[%s] thread[%x,%x] / set fd_array for process %x / cycle %d\n",
324	__FUNCTION__, parent_pid, this->trdid, pid , cycle );
325	#endif
326
327	// reset children list root
328	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
329	process->children_nr = 0;
330	remote_queuelock_init( XPTR( local_cxy,
331	&process->children_lock ), LOCK_PROCESS_CHILDREN );
332
333	// reset semaphore / mutex / barrier / condvar list roots and lock
334	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
335	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
336	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
337	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
338	remote_queuelock_init( XPTR( local_cxy ,
339	&process->sync_lock ), LOCK_PROCESS_USERSYNC );
340
341	// reset open directories root and lock
342	xlist_root_init( XPTR( local_cxy , &process->dir_root ) );
343	remote_queuelock_init( XPTR( local_cxy ,
344	&process->dir_lock ), LOCK_PROCESS_DIR );
345
346	// register new process in the local cluster manager pref_tbl[]
347	lpid_t lpid = LPID_FROM_PID( pid );
348	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
349
350	// register new process descriptor in local cluster manager local_list
351	cluster_process_local_link( process );
352
353	// register new process descriptor in local cluster manager copies_list
354	cluster_process_copies_link( process );
355
356	// initialize th_tbl[] array and associated threads
357	uint32_t i;
358
359	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
360	{
361	process->th_tbl[i] = NULL;
362	}
363	process->th_nr = 0;
364	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
365
366	hal_fence();
367
368	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
369	cycle = (uint32_t)hal_get_cycles();
370	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
371	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
372	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
373	#endif
374
375	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
376	hal_vmm_display( parent_xp , false );
377	hal_vmm_display( XPTR( local_cxy , process ) , false );
378	#endif
379
380	return 0;
381
382	} // process_reference_init()
383
384	/////////////////////////////////////////////////////
385	error_t process_copy_init( process_t * local_process,
386	xptr_t reference_process_xp )
387	{
388	error_t error;
389	vmm_t * vmm;
390
391	#if DEBUG_PROCESS_COPY_INIT \|\| DEBUG_PROCESS_ERROR
392	thread_t * this = CURRENT_THREAD;
393	uint32_t cycle = (uint32_t)hal_get_cycles();
394	#endif
395
396	// get reference process cluster and local pointer
397	cxy_t ref_cxy = GET_CXY( reference_process_xp );
398	process_t * ref_ptr = GET_PTR( reference_process_xp );
399
400	// get pointer on process vmm
401	vmm = &local_process->vmm;
402
403	// initialize PID, REF_XP, PARENT_XP, and STATE
404	local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) );
405	local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
406	local_process->ref_xp = reference_process_xp;
407	local_process->owner_xp = reference_process_xp;
408	local_process->term_state = 0;
409
410	#if DEBUG_PROCESS_COPY_INIT
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( __FUNCTION__, (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
426	if( error )
427	{
428
429	#if DEBUG_PROCESS_ERROR
430	printk("\n[ERROR] in %s : thread[%x,%x] cannot create empty GPT / cycle %d\n",
431	__FUNCTION__, this->process->pid, this->trdid, cycle );
432	#endif
433	return -1;
434	}
435
436	// initialize GPT and VSL locks
437	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
438
439	// register kernel vsegs in VMM as required by the architecture
440	error = hal_vmm_kernel_update( local_process );
441
442	if( error )
443	{
444
445	#if DEBUG_PROCESS_ERROR
446	printk("\n[ERROR] in %s : thread[%x,%x] cannot register kernel vsegs in VMM / cycle %d\n",
447	__FUNCTION__, this->process->pid, this->trdid, cycle );
448	#endif
449	return -1;
450	}
451
452	// create "args" and "envs" vsegs
453	// create "stacks" and "mmap" vsegs allocators
454	// initialize locks protecting GPT and VSL
455	error = vmm_user_init( local_process );
456
457	if( error )
458	{
459
460	#if DEBUG_PROCESS_ERROR
461	printk("\n[ERROR] in %s : thread[%x,%x] cannot register user vsegs in VMM / cycle %d\n",
462	__FUNCTION__, this->process->pid, this->trdid, cycle );
463	#endif
464	return -1;
465	}
466
467	#if (DEBUG_PROCESS_COPY_INIT & 1)
468	cycle = (uint32_t)hal_get_cycles();
469	if( DEBUG_PROCESS_COPY_INIT < cycle )
470	printk("\n[%s] thread[%x,%x] initialized vmm for process %x / cycle %d\n",
471	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
472	#endif
473
474	// set process file descriptors array
475	process_fd_init( local_process );
476
477	// set vfs_root_xp / vfs_bin_xp / cwd_xp fields
478	local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
479	local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
480	local_process->cwd_xp = XPTR_NULL;
481
482	// reset children list root (not used in a process descriptor copy)
483	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
484	local_process->children_nr = 0;
485	remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ),
486	LOCK_PROCESS_CHILDREN );
487
488	// reset children_list (not used in a process descriptor copy)
489	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
490
491	// reset semaphores list root (not used in a process descriptor copy)
492	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
493	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
494	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
495	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
496
497	// initialize th_tbl[] array and associated fields
498	uint32_t i;
499	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
500	{
501	local_process->th_tbl[i] = NULL;
502	}
503	local_process->th_nr = 0;
504	rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL );
505
506	// register new process descriptor in local cluster manager local_list
507	cluster_process_local_link( local_process );
508
509	// register new process descriptor in owner cluster manager copies_list
510	cluster_process_copies_link( local_process );
511
512	hal_fence();
513
514	#if DEBUG_PROCESS_COPY_INIT
515	cycle = (uint32_t)hal_get_cycles();
516	if( DEBUG_PROCESS_COPY_INIT < cycle )
517	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
518	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
519	#endif
520
521	return 0;
522
523	} // end process_copy_init()
524
525	///////////////////////////////////////////
526	void process_destroy( process_t * process )
527	{
528	xptr_t parent_xp;
529	process_t * parent_ptr;
530	cxy_t parent_cxy;
531	xptr_t children_lock_xp;
532	xptr_t children_nr_xp;
533
534	pid_t pid = process->pid;
535
536	// check no more threads
537	assert( __FUNCTION__, (process->th_nr == 0),
538	"process %x in cluster %x contains threads", pid , local_cxy );
539
540	#if DEBUG_PROCESS_DESTROY
541	thread_t * this = CURRENT_THREAD;
542	uint32_t cycle = (uint32_t)hal_get_cycles();
543	if( DEBUG_PROCESS_DESTROY < cycle )
544	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
545	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
546	#endif
547
548	// Destroy VMM
549	vmm_destroy( process );
550
551	#if (DEBUG_PROCESS_DESTROY & 1)
552	if( DEBUG_PROCESS_DESTROY < cycle )
553	printk("\n[%s] thread[%x,%x] destroyed VMM for process %x in cluster %x\n",
554	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
555	#endif
556
557	// remove process from local_list in local cluster manager
558	cluster_process_local_unlink( process );
559
560	#if (DEBUG_PROCESS_DESTROY & 1)
561	if( DEBUG_PROCESS_DESTROY < cycle )
562	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from local list\n",
563	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
564	#endif
565
566	// remove process from copies_list in owner cluster manager
567	cluster_process_copies_unlink( process );
568
569	#if (DEBUG_PROCESS_DESTROY & 1)
570	if( DEBUG_PROCESS_DESTROY < cycle )
571	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from copies list\n",
572	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
573	#endif
574
575	// when target process cluster is the owner cluster
576	// - remove process from TXT list and transfer ownership
577	// - remove process from children_list
578	// - release PID
579	if( CXY_FROM_PID( pid ) == local_cxy )
580	{
581	process_txt_detach( XPTR( local_cxy , process ) );
582
583	#if (DEBUG_PROCESS_DESTROY & 1)
584	if( DEBUG_PROCESS_DESTROY < cycle )
585	printk("\n[%s] thread[%x,%x] removed process %x from TXT list\n",
586	__FUNCTION__, this->process->pid, this->trdid, pid );
587	#endif
588
589	// get pointers on parent process
590	parent_xp = process->parent_xp;
591	parent_cxy = GET_CXY( parent_xp );
592	parent_ptr = GET_PTR( parent_xp );
593
594	// get extended pointer on children_lock in parent process
595	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
596	children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
597
598	// remove process from children_list
599	remote_queuelock_acquire( children_lock_xp );
600	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
601	hal_remote_atomic_add( children_nr_xp , -1 );
602	remote_queuelock_release( children_lock_xp );
603
604	#if (DEBUG_PROCESS_DESTROY & 1)
605	if( DEBUG_PROCESS_DESTROY < cycle )
606	printk("\n[%s] thread[%x,%x] removed process %x from parent process children list\n",
607	__FUNCTION__, this->process->pid, this->trdid, pid );
608	#endif
609
610	// release the process PID to cluster manager
611	cluster_pid_release( pid );
612
613	#if (DEBUG_PROCESS_DESTROY & 1)
614	if( DEBUG_PROCESS_DESTROY < cycle )
615	printk("\n[%s] thread[%x,%x] released process PID %x to pmgr in cluster %x\n",
616	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
617	#endif
618
619	}
620
621	// FIXME decrement the refcount on file pointer for vfs_bin_xp [AG]
622
623	// FIXME close all open files [AG]
624
625	// FIXME synchronize dirty files [AG]
626
627	// release memory allocated to process descriptor
628	kmem_free( process , bits_log2(sizeof(process_t)) );
629
630	#if DEBUG_PROCESS_DESTROY
631	cycle = (uint32_t)hal_get_cycles();
632	if( DEBUG_PROCESS_DESTROY < cycle )
633	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
634	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
635	#endif
636
637	} // end process_destroy()
638
639	///////////////////////////////////////////////////////////////////
640	const char * process_action_str( process_sigactions_t action_type )
641	{
642	switch ( action_type )
643	{
644	case BLOCK_ALL_THREADS: return "BLOCK";
645	case UNBLOCK_ALL_THREADS: return "UNBLOCK";
646	case DELETE_ALL_THREADS: return "DELETE";
647	default: return "undefined";
648	}
649	}
650
651	////////////////////////////////////////
652	void process_sigaction( pid_t pid,
653	uint32_t type )
654	{
655	cxy_t owner_cxy; // owner cluster identifier
656	lpid_t lpid; // process index in owner cluster
657	cluster_t * cluster; // pointer on cluster manager
658	xptr_t root_xp; // extended pointer on root of copies
659	xptr_t lock_xp; // extended pointer on lock protecting copies
660	xptr_t iter_xp; // iterator on copies list
661	xptr_t process_xp; // extended pointer on process copy
662	cxy_t process_cxy; // process copy cluster identifier
663	process_t * process_ptr; // local pointer on process copy
664	reg_t save_sr; // for critical section
665	thread_t * client; // pointer on client thread
666	xptr_t client_xp; // extended pointer on client thread
667	process_t * local; // pointer on process copy in local cluster
668	uint32_t remote_nr; // number of remote process copies
669	rpc_desc_t rpc; // shared RPC descriptor
670	uint32_t responses; // shared RPC responses counter
671
672	client = CURRENT_THREAD;
673	client_xp = XPTR( local_cxy , client );
674	local = NULL;
675	remote_nr = 0;
676
677	// check calling thread can yield
678	thread_assert_can_yield( client , __FUNCTION__ );
679
680	#if DEBUG_PROCESS_SIGACTION
681	uint32_t cycle = (uint32_t)hal_get_cycles();
682	if( DEBUG_PROCESS_SIGACTION < cycle )
683	printk("\n[%s] thread[%x,%x] enter to %s process %x / cycle %d\n",
684	__FUNCTION__ , client->process->pid, client->trdid,
685	process_action_str( type ) , pid , cycle );
686	#endif
687
688	// get pointer on local cluster manager
689	cluster = LOCAL_CLUSTER;
690
691	// get owner cluster identifier and process lpid
692	owner_cxy = CXY_FROM_PID( pid );
693	lpid = LPID_FROM_PID( pid );
694
695	// get root of list of copies and lock from owner cluster
696	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
697	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
698
699	// check action type
700	assert( __FUNCTION__, ((type == DELETE_ALL_THREADS ) \|\|
701	(type == BLOCK_ALL_THREADS ) \|\|
702	(type == UNBLOCK_ALL_THREADS )), "illegal action type" );
703
704	// This client thread send parallel RPCs to all remote clusters containing
705	// target process copies, wait all responses, and then handles directly
706	// the threads in local cluster, when required.
707	// The client thread allocates a - shared - RPC descriptor in the stack,
708	// because all parallel, non-blocking, server threads use the same input
709	// arguments, and use the shared RPC response field
710
711	// mask IRQs
712	hal_disable_irq( &save_sr);
713
714	// client thread blocks itself
715	thread_block( client_xp , THREAD_BLOCKED_RPC );
716
717	// initialize RPC responses counter
718	responses = 0;
719
720	// initialize shared RPC descriptor
721	// can be shared, because no out arguments
722	rpc.rsp = &responses;
723	rpc.blocking = false;
724	rpc.index = RPC_PROCESS_SIGACTION;
725	rpc.thread = client;
726	rpc.lid = client->core->lid;
727	rpc.args[0] = pid;
728	rpc.args[1] = type;
729
730	// take the lock protecting process copies
731	remote_queuelock_acquire( lock_xp );
732
733	// scan list of process copies
734	XLIST_FOREACH( root_xp , iter_xp )
735	{
736	// get extended pointers and cluster on process
737	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
738	process_cxy = GET_CXY( process_xp );
739	process_ptr = GET_PTR( process_xp );
740
741	if( process_cxy == local_cxy ) // process copy is local
742	{
743	local = process_ptr;
744	}
745	else // process copy is remote
746	{
747	// update number of remote process copies
748	remote_nr++;
749
750	// atomically increment RPC responses counter
751	hal_atomic_add( &responses , 1 );
752
753	#if DEBUG_PROCESS_SIGACTION
754	if( DEBUG_PROCESS_SIGACTION < cycle )
755	printk("\n[%s] thread[%x,%x] send RPC to cluster %x for process %x\n",
756	__FUNCTION__, client->process->pid, client->trdid, process_cxy, pid );
757	#endif
758	// call RPC in target cluster
759	rpc_send( process_cxy , &rpc );
760	}
761	} // end list of copies
762
763	// release the lock protecting process copies
764	remote_queuelock_release( lock_xp );
765
766	// restore IRQs
767	hal_restore_irq( save_sr);
768
769	// - if there is remote process copies, the client thread deschedules,
770	// (it will be unblocked by the last RPC server thread).
771	// - if there is no remote copies, the client thread unblock itself.
772	if( remote_nr )
773	{
774	sched_yield("blocked on rpc_process_sigaction");
775	}
776	else
777	{
778	thread_unblock( client_xp , THREAD_BLOCKED_RPC );
779	}
780
781	// handle the local process copy if required
782	if( local != NULL )
783	{
784
785	#if DEBUG_PROCESS_SIGACTION
786	if( DEBUG_PROCESS_SIGACTION < cycle )
787	printk("\n[%s] thread[%x,%x] handles local process %x in cluster %x\n",
788	__FUNCTION__, client->process->pid, client->trdid, pid , local_cxy );
789	#endif
790	if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp );
791	else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local );
792	else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local );
793	}
794
795	#if DEBUG_PROCESS_SIGACTION
796	cycle = (uint32_t)hal_get_cycles();
797	if( DEBUG_PROCESS_SIGACTION < cycle )
798	printk("\n[%s] thread[%x,%x] exit after %s process %x / cycle %d\n",
799	__FUNCTION__, client->process->pid, client->trdid,
800	process_action_str( type ), pid, cycle );
801	#endif
802
803	} // end process_sigaction()
804
805	/////////////////////////////////////////////////
806	void process_block_threads( process_t * process )
807	{
808	thread_t * target; // pointer on target thread
809	thread_t * this; // pointer on calling thread
810	uint32_t ltid; // index in process th_tbl[]
811	uint32_t count; // requests counter
812	volatile uint32_t ack_count; // acknowledges counter
813
814	// get calling thread pointer
815	this = CURRENT_THREAD;
816
817	#if DEBUG_PROCESS_SIGACTION
818	pid_t pid = process->pid;
819	uint32_t cycle = (uint32_t)hal_get_cycles();
820	if( DEBUG_PROCESS_SIGACTION < cycle )
821	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
822	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
823	#endif
824
825	// check target process is an user process
826	assert( __FUNCTION__, (LPID_FROM_PID( process->pid ) != 0 ),
827	"process %x is not an user process\n", process->pid );
828
829	// get lock protecting process th_tbl[]
830	rwlock_rd_acquire( &process->th_lock );
831
832	// loop on target process local threads
833	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
834	// - if the calling thread and the target thread are not running on the same
835	// core, we ask the target scheduler to acknowlege the blocking
836	// to be sure that the target thread is not running.
837	// - if the calling thread and the target thread are running on the same core,
838	// we don't need confirmation from scheduler.
839
840	for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ )
841	{
842	target = process->th_tbl[ltid];
843
844	if( target != NULL ) // thread exist
845	{
846	count++;
847
848	// set the global blocked bit in target thread descriptor.
849	thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
850
851	if( this->core->lid != target->core->lid )
852	{
853	// increment responses counter
854	hal_atomic_add( (void*)&ack_count , 1 );
855
856	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
857	thread_set_req_ack( target , (uint32_t *)&ack_count );
858
859	// force scheduling on target thread
860	dev_pic_send_ipi( local_cxy , target->core->lid );
861	}
862	}
863	}
864
865	// release lock protecting process th_tbl[]
866	rwlock_rd_release( &process->th_lock );
867
868	// wait other threads acknowledges TODO this could be improved...
869	while( 1 )
870	{
871	// exit when all scheduler acknowledges received
872	if ( ack_count == 0 ) break;
873
874	// wait 1000 cycles before retry
875	hal_fixed_delay( 1000 );
876	}
877
878	#if DEBUG_PROCESS_SIGACTION
879	cycle = (uint32_t)hal_get_cycles();
880	if( DEBUG_PROCESS_SIGACTION < cycle )
881	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
882	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
883	#endif
884
885	} // end process_block_threads()
886
887	/////////////////////////////////////////////////
888	void process_delete_threads( process_t * process,
889	xptr_t client_xp )
890	{
891	thread_t * target; // local pointer on target thread
892	xptr_t target_xp; // extended pointer on target thread
893	cxy_t owner_cxy; // owner process cluster
894	uint32_t ltid; // index in process th_tbl
895	uint32_t count; // threads counter
896
897	// get calling thread pointer
898
899	// get target process owner cluster
900	owner_cxy = CXY_FROM_PID( process->pid );
901
902	#if DEBUG_PROCESS_SIGACTION
903	thread_t * this = CURRENT_THREAD;
904	uint32_t cycle = (uint32_t)hal_get_cycles();
905	if( DEBUG_PROCESS_SIGACTION < cycle )
906	printk("\n[%s] thread[%x,%x] enter for process %x n cluster %x / cycle %d\n",
907	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy, cycle );
908	#endif
909
910	// check target process is an user process
911	assert( __FUNCTION__, (LPID_FROM_PID( process->pid ) != 0),
912	"process %x is not an user process\n", process->pid );
913
914	// get lock protecting process th_tbl[]
915	rwlock_wr_acquire( &process->th_lock );
916
917	// loop on target process local threads
918	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
919	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
920	{
921	target = process->th_tbl[ltid];
922
923	if( target != NULL ) // valid thread
924	{
925	count++;
926	target_xp = XPTR( local_cxy , target );
927
928	// main thread and client thread should not be deleted
929	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
930	(client_xp) != target_xp ) // not client thread
931	{
932	// mark target thread for delete and block it
933	thread_delete_request( target_xp , true ); // forced
934	}
935	}
936	}
937
938	// release lock protecting process th_tbl[]
939	rwlock_wr_release( &process->th_lock );
940
941	#if DEBUG_PROCESS_SIGACTION
942	cycle = (uint32_t)hal_get_cycles();
943	if( DEBUG_PROCESS_SIGACTION < cycle )
944	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
945	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy , cycle );
946	#endif
947
948	} // end process_delete_threads()
949
950	///////////////////////////////////////////////////
951	void process_unblock_threads( process_t * process )
952	{
953	thread_t * target; // pointer on target thead
954	uint32_t ltid; // index in process th_tbl
955	uint32_t count; // requests counter
956
957	#if DEBUG_PROCESS_SIGACTION
958	thread_t * this = CURRENT_THREAD;
959	pid_t pid = process->pid;
960	uint32_t cycle = (uint32_t)hal_get_cycles();
961	if( DEBUG_PROCESS_SIGACTION < cycle )
962	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
963	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
964	#endif
965
966	// check target process is an user process
967	assert( __FUNCTION__, ( LPID_FROM_PID( process->pid ) != 0 ),
968	"process %x is not an user process\n", process->pid );
969
970	// get lock protecting process th_tbl[]
971	rwlock_rd_acquire( &process->th_lock );
972
973	// loop on process threads to unblock all threads
974	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
975	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
976	{
977	target = process->th_tbl[ltid];
978
979	if( target != NULL ) // thread found
980	{
981	count++;
982
983	// reset the global blocked bit in target thread descriptor.
984	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
985	}
986	}
987
988	// release lock protecting process th_tbl[]
989	rwlock_rd_release( &process->th_lock );
990
991	#if DEBUG_PROCESS_SIGACTION
992	cycle = (uint32_t)hal_get_cycles();
993	if( DEBUG_PROCESS_SIGACTION < cycle )
994	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
995	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
996	#endif
997
998	} // end process_unblock_threads()
999
1000	///////////////////////////////////////////////
1001	process_t * process_get_local_copy( pid_t pid )
1002	{
1003	error_t error;
1004	process_t * process; // local pointer on process
1005	xptr_t process_xp; // extended pointer on process
1006
1007	#if DEBUG_PROCESS_GET_LOCAL_COPY \|\| DEBUG_PROCESS_ERROR
1008	thread_t * this = CURRENT_THREAD;
1009	uint32_t cycle = (uint32_t)hal_get_cycles();
1010	#endif
1011
1012	cluster_t * cluster = LOCAL_CLUSTER;
1013
1014	#if DEBUG_PROCESS_GET_LOCAL_COPY
1015	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
1016	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
1017	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
1018	#endif
1019
1020	// get lock protecting local list of processes
1021	remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1022
1023	// scan the local list of process descriptors to find the process
1024	xptr_t iter;
1025	bool_t found = false;
1026	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
1027	{
1028	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
1029	process = GET_PTR( process_xp );
1030	if( process->pid == pid )
1031	{
1032	found = true;
1033	break;
1034	}
1035	}
1036
1037	// release lock protecting local list of processes
1038	remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
1039
1040	// allocate memory for a new local process descriptor
1041	// and initialise it from reference cluster if not found
1042	if( !found )
1043	{
1044	// get extended pointer on reference process descriptor
1045	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
1046
1047	assert( __FUNCTION__, (ref_xp != XPTR_NULL) , "illegal pid\n" );
1048
1049	// allocate memory for local process descriptor
1050	process = kmem_alloc( bits_log2(sizeof(process_t)) , AF_ZERO );
1051
1052	if( process == NULL ) return NULL;
1053
1054	// initialize local process descriptor copy
1055	error = process_copy_init( process , ref_xp );
1056
1057	if( error )
1058	{
1059
1060	#if DEBUG_PROCESS_ERROR
1061	printk("\n[ERROR] in %s : thread[%x,%x] cannot initialize local process copy / cycle %d\n",
1062	__FUNCTION__, this->process->pid, this->trdid, cycle );
1063	#endif
1064	return NULL;
1065	}
1066	}
1067
1068	#if DEBUG_PROCESS_GET_LOCAL_COPY
1069	cycle = (uint32_t)hal_get_cycles();
1070	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
1071	printk("\n[%s] thread[%x,%x] exit in cluster %x / process %x / cycle %d\n",
1072	__FUNCTION__, this->process->pid, this->trdid, local_cxy, process, cycle );
1073	#endif
1074
1075	return process;
1076
1077	} // end process_get_local_copy()
1078
1079	////////////////////////////////////////////
1080	pid_t process_get_ppid( xptr_t process_xp )
1081	{
1082	cxy_t process_cxy;
1083	process_t * process_ptr;
1084	xptr_t parent_xp;
1085	cxy_t parent_cxy;
1086	process_t * parent_ptr;
1087
1088	// get process cluster and local pointer
1089	process_cxy = GET_CXY( process_xp );
1090	process_ptr = GET_PTR( process_xp );
1091
1092	// get pointers on parent process
1093	parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
1094	parent_cxy = GET_CXY( parent_xp );
1095	parent_ptr = GET_PTR( parent_xp );
1096
1097	return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
1098	}
1099
1100	//////////////////////////////////////////////////////////////////////////////////////////
1101	// File descriptor array related functions
1102	//////////////////////////////////////////////////////////////////////////////////////////
1103
1104	///////////////////////////////////////////
1105	char * process_fd_type_str( uint32_t type )
1106	{
1107	switch( type )
1108	{
1109	case FILE_TYPE_REG : return "FILE";
1110	case FILE_TYPE_DIR : return "DIR";
1111	case FILE_TYPE_FIFO : return "FIFO";
1112	case FILE_TYPE_PIPE : return "PIPE";
1113	case FILE_TYPE_SOCK : return "SOCK";
1114	case FILE_TYPE_DEV : return "DEV";
1115	case FILE_TYPE_BLK : return "BLK";
1116	case FILE_TYPE_SYML : return "SYML";
1117
1118	default : return "undefined";
1119	}
1120	}
1121
1122	///////////////////////////////////////////
1123	void process_fd_init( process_t * process )
1124	{
1125	uint32_t fd;
1126
1127	// initialize lock
1128	remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY );
1129
1130	// initialize number of open files
1131	process->fd_array.max = 0;
1132
1133	// initialize array
1134	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1135	{
1136	process->fd_array.array[fd] = XPTR_NULL;
1137	}
1138	}
1139
1140	////////////////////////////////////////////////////
1141	error_t process_fd_register( xptr_t process_xp,
1142	xptr_t file_xp,
1143	uint32_t * fdid )
1144	{
1145	bool_t found;
1146	uint32_t id;
1147	uint32_t max; // current value of max non-free slot index
1148	xptr_t entry_xp; // current value of one fd_array entry
1149	xptr_t lock_xp; // extended pointer on lock protecting fd_array
1150	xptr_t max_xp; // extended pointer on max field in fd_array
1151
1152	#if DEBUG_PROCESS_FD_REGISTER
1153	thread_t * this = CURRENT_THREAD;
1154	uint32_t cycle = (uint32_t)hal_get_cycles();
1155	#endif
1156
1157	// get target process cluster and local pointer
1158	process_t * process_ptr = GET_PTR( process_xp );
1159	cxy_t process_cxy = GET_CXY( process_xp );
1160
1161	// check target process is owner process
1162	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) ) ),
1163	"process must be owner process\n" );
1164
1165	#if DEBUG_PROCESS_FD_REGISTER
1166	pid_t tgt_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1167	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1168	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
1169	__FUNCTION__, this->process->pid, this->trdid, tgt_pid, cycle );
1170	#endif
1171
1172	// build extended pointers on lock & max
1173	lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1174	max_xp = XPTR( process_cxy , &process_ptr->fd_array.max );
1175
1176	// take lock protecting fd_array
1177	remote_queuelock_acquire( lock_xp );
1178
1179	found = false;
1180
1181	// get current value of max_fdid
1182	max = hal_remote_l32( max_xp );
1183
1184	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
1185	{
1186	// get fd_array entry
1187	entry_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) );
1188
1189	// take the first empty slot
1190	if ( entry_xp == XPTR_NULL )
1191	{
1192	// update fd_array
1193	hal_remote_s64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) , file_xp );
1194
1195	// update max when required
1196	if( id > max ) hal_remote_s32( max_xp , id );
1197
1198	// exit loop
1199	*fdid = id;
1200	found = true;
1201	break;
1202	}
1203	}
1204
1205	// release lock protecting fd_array
1206	remote_queuelock_release( lock_xp );
1207
1208	#if DEBUG_PROCESS_FD_REGISTER
1209	cycle = (uint32_t)hal_get_cycles();
1210	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1211	printk("\n[%s] thread[%x,%x] exit for process %x / fdid %d / cycle %d\n",
1212	__FUNCTION__, this->process->pid, this->trdid, tgt_pid, id, cycle );
1213	#endif
1214
1215	if ( !found ) return -1;
1216	else return 0;
1217
1218	} // end process_fd_register()
1219
1220	/////////////////////////////////////////////
1221	void process_fd_remove( xptr_t process_xp,
1222	uint32_t fdid )
1223	{
1224	pid_t pid; // target process PID
1225	lpid_t lpid; // target process LPID
1226	xptr_t file_xp; // extended pointer on file descriptor
1227	xptr_t iter_xp; // iterator for list of process copies
1228	xptr_t copy_xp; // extended pointer on process copy
1229	process_t * copy_ptr; // local pointer on process copy
1230	cxy_t copy_cxy; // process copy cluster identifier
1231
1232	// get target process cluster and local pointer
1233	process_t * process_ptr = GET_PTR( process_xp );
1234	cxy_t process_cxy = GET_CXY( process_xp );
1235
1236	// check target process is owner process
1237	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) ) ),
1238	"process must be owner process\n" );
1239
1240	// get target process pid and lpid
1241	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1242	lpid = LPID_FROM_PID( pid );
1243
1244	#if DEBUG_PROCESS_FD_REMOVE
1245	uint32_t cycle = (uint32_t)hal_get_cycles();
1246	thread_t * this = CURRENT_THREAD;
1247	if( DEBUG_PROCESS_FD_REMOVE < cycle )
1248	printk("\n[%s] thread[%x,%x] enter for fdid %d in process %x / cycle %d\n",
1249	__FUNCTION__, this->process->pid, this->trdid, fdid, pid, cycle );
1250	#endif
1251
1252	// get extended pointer on file descriptor
1253	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1254
1255	// build extended pointers on list_of_copies root and lock (in owner cluster)
1256	xptr_t copies_root_xp = XPTR( process_cxy , &LOCAL_CLUSTER->pmgr.copies_root[lpid] );
1257	xptr_t copies_lock_xp = XPTR( process_cxy , &LOCAL_CLUSTER->pmgr.copies_lock[lpid] );
1258
1259	// build extended pointer on fd_array lock and max
1260	xptr_t fd_lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1261	xptr_t fd_max_xp = XPTR( process_cxy , &process_ptr->fd_array.max );
1262
1263	// take lock protecting fd_array
1264	remote_queuelock_acquire( fd_lock_xp );
1265
1266	// take the lock protecting the list of copies
1267	remote_queuelock_acquire( copies_lock_xp );
1268
1269	// get max value
1270	uint32_t max = hal_remote_l32( fd_max_xp );
1271
1272	// loop on list of process copies
1273	XLIST_FOREACH( copies_root_xp , iter_xp )
1274	{
1275	// get pointers on process copy
1276	copy_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
1277	copy_ptr = GET_PTR( copy_xp );
1278	copy_cxy = GET_CXY( copy_xp );
1279
1280	// release the fd_array entry in process copy
1281	hal_remote_s64( XPTR( copy_cxy , &copy_ptr->fd_array.array[fdid] ), XPTR_NULL );
1282	}
1283
1284	// update max when required
1285	if( fdid == max ) hal_remote_s32( fd_max_xp , max-1 );
1286
1287	// release the lock protecting fd_array
1288	remote_queuelock_release( fd_lock_xp );
1289
1290	// release the lock protecting the list of copies
1291	remote_queuelock_release( copies_lock_xp );
1292
1293	#if DEBUG_PROCESS_FD_REMOVE
1294	cycle = (uint32_t)hal_get_cycles();
1295	if( DEBUG_PROCESS_FD_REMOVE < cycle )
1296	printk("\n[%s] thread[%x,%x] exit for fdid %d in process %x / cycle %d\n",
1297	__FUNCTION__, this->process->pid, this->trdid, fdid, pid, cycle );
1298	#endif
1299
1300	} // end process_fd_remove()
1301
1302	//////////////////////////////////////////////
1303	void process_fd_clean_all( xptr_t process_xp )
1304	{
1305	uint32_t fdid;
1306	xptr_t file_xp; // one fd_array entry
1307	xptr_t lock_xp; // extendad pointer on lock protecting fd_array
1308	uint32_t max; // number of registered files
1309
1310	// get process cluster, local pointer and PID
1311	process_t * process_ptr = GET_PTR( process_xp );
1312	cxy_t process_cxy = GET_CXY( process_xp );
1313
1314	// check target process is owner process
1315	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp )) ),
1316	"process must be owner process\n" );
1317
1318	#if DEBUG_PROCESS_FD_CLEAN_ALL
1319	thread_t * this = CURRENT_THREAD;
1320	uint32_t cycle = (uint32_t)hal_get_cycles();
1321	if( DEBUG_PROCESS_FD_CLEAN_ALL < cycle )
1322	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
1323	__FUNCTION__, this->process->pid, this->trdid, cycle );
1324
1325	process_fd_display( process_xp );
1326	#endif
1327
1328	// build extended pointer on lock protecting the fd_array
1329	lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1330
1331	// get max index for fd_array
1332	max = hal_remote_l32( XPTR( process_cxy , &process_ptr->fd_array.max ));
1333
1334	// take lock protecting fd_array
1335	remote_queuelock_acquire( lock_xp );
1336
1337	for( fdid = 0 ; fdid <= max ; fdid++ )
1338	{
1339	// get fd_array entry
1340	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ) );
1341
1342	if ( file_xp != XPTR_NULL )
1343	{
1344	vfs_file_t * file_ptr = GET_PTR( file_xp );
1345	cxy_t file_cxy = GET_CXY( file_xp );
1346
1347	// get file type
1348	uint32_t file_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ));
1349
1350	if( file_type == FILE_TYPE_REG )
1351	{
1352	vfs_close( file_xp , fdid );
1353	}
1354	if( file_type == FILE_TYPE_SOCK )
1355	{
1356	socket_close( file_xp , fdid );
1357	}
1358	}
1359	}
1360
1361	// release lock protecting fd_array
1362	remote_queuelock_release( lock_xp );
1363
1364	#if DEBUG_PROCESS_FD_CLEAN_ALL
1365	cycle = (uint32_t)hal_get_cycles();
1366	if( DEBUG_PROCESS_FD_CLEAN_ALL < cycle )
1367	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
1368	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1369	#endif
1370
1371	} // end process_fd_clean_all()
1372
1373	//////////////////////////////////////////////////////////////
1374	xptr_t process_fd_get_xptr_from_owner( xptr_t process_xp,
1375	uint32_t fdid )
1376	{
1377	cxy_t process_cxy = GET_CXY( process_xp );
1378	process_t * process_ptr = GET_PTR( process_xp );
1379
1380	assert( __FUNCTION__, (hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp )) == process_xp),
1381	"process_xp argument must be the owner process" );
1382
1383	// access owner process fd_array
1384	return hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1385
1386	} // end process_fd_get_xptr_from_owner()
1387
1388	///////////////////////////////////////////////////////////
1389	xptr_t process_fd_get_xptr_from_local( process_t * process,
1390	uint32_t fdid )
1391	{
1392	xptr_t file_xp;
1393	xptr_t lock_xp;
1394
1395	// access local copy of process descriptor
1396	file_xp = process->fd_array.array[fdid];
1397
1398	if( file_xp == XPTR_NULL )
1399	{
1400	// get owner process cluster and local pointer
1401	xptr_t owner_xp = process->owner_xp;
1402	cxy_t owner_cxy = GET_CXY( owner_xp );
1403	process_t * owner_ptr = GET_PTR( owner_xp );
1404
1405	// build extended pointer on lock protecting fd_array
1406	lock_xp = XPTR( owner_cxy , &owner_ptr->fd_array.lock );
1407
1408	// take lock protecting fd_array
1409	remote_queuelock_acquire( lock_xp );
1410
1411	// access owner process descriptor
1412	file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[fdid] ) );
1413
1414	if( file_xp != XPTR_NULL )
1415	{
1416	// update local fd_array
1417	process->fd_array.array[fdid] = file_xp;
1418	}
1419
1420	// release lock protecting fd_array
1421	remote_queuelock_release( lock_xp );
1422	}
1423
1424	return file_xp;
1425
1426	} // end process_fd_get_xptr_from_local()
1427
1428	////////////////////////////////////////////
1429	error_t process_fd_replicate( xptr_t dst_xp,
1430	xptr_t src_xp )
1431	{
1432	uint32_t fdid; // current file descriptor index
1433	xptr_t old_xp; // extended pointer on a file descriptor (stored in SRC fd_array)
1434	xptr_t new_xp; // extended pointer on a file descriptor (stored in DST fd_array)
1435	error_t error;
1436
1437	// get cluster and local pointer for SRC process
1438	cxy_t src_cxy = GET_CXY( src_xp );
1439	process_t * src_ptr = GET_PTR( src_xp );
1440
1441	assert( __FUNCTION__, (src_xp == hal_remote_l64( XPTR( src_cxy , &src_ptr->owner_xp ))),
1442	"src_xp process not in owner cluster" );
1443
1444	// get cluster and local pointer for DST fd_array
1445	cxy_t dst_cxy = GET_CXY( dst_xp );
1446	process_t * dst_ptr = GET_PTR( dst_xp );
1447
1448	assert( __FUNCTION__, (dst_xp == hal_remote_l64( XPTR( dst_cxy , &dst_ptr->owner_xp ))),
1449	"dst_xp process not in owner cluster" );
1450
1451	// build extende pointers on SRC fd_array lock and max fields
1452	xptr_t src_lock_xp = XPTR( src_cxy , &src_ptr->fd_array.lock );
1453	xptr_t src_max_xp = XPTR( src_cxy , &src_ptr->fd_array.max );
1454
1455	// get the remote lock protecting the src fd_array
1456	remote_queuelock_acquire( src_lock_xp );
1457
1458	// loop on fd_array entries
1459	for( fdid = 0 ; fdid <= hal_remote_l32( src_max_xp ) ; fdid++ )
1460	{
1461	old_xp = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->fd_array.array[fdid] ) );
1462
1463	if( old_xp != XPTR_NULL )
1464	{
1465	// get the existing file descriptor cluster and local pointer
1466	vfs_file_t * old_ptr = GET_PTR( old_xp );
1467	cxy_t old_cxy = GET_CXY( old_xp );
1468
1469	// get existing file attributes and local pointer on inode
1470	uint32_t attr = hal_remote_l32( XPTR( old_cxy , &old_ptr->attr ) );
1471	vfs_inode_t * inode_ptr = hal_remote_lpt( XPTR( old_cxy , &old_ptr->inode ) );
1472
1473	// create a new file descriptor in same cluster as the existing one
1474	error = vfs_file_create( XPTR( old_cxy , inode_ptr ),
1475	attr,
1476	&new_xp );
1477	if( error )
1478	{
1479
1480	#if DEBUG_PROCESS_ERROR
1481	thread_t * this = CURRENT_THREAD;
1482	uint32_t cycle = (uint32_t)hal_get_cycles();
1483	printk("\n[ERROR] in %s : thread[%x,%x] cannot create file descriptor / cycle %d\n",
1484	__FUNCTION__, this->process->pid, this->trdid, cycle );
1485	#endif
1486	return -1;
1487	}
1488
1489	// register new_xp in DST fd_array
1490	hal_remote_s64( XPTR( dst_cxy , &dst_ptr->fd_array.array[fdid] ) , new_xp );
1491	}
1492	}
1493
1494	// release lock on source process fd_array
1495	remote_queuelock_release( src_lock_xp );
1496
1497	return 0;
1498
1499	} // end process_fd_replicate()
1500
1501
1502	////////////////////////////////////
1503	bool_t process_fd_array_full( void )
1504	{
1505	// get extended pointer on owner process
1506	xptr_t owner_xp = CURRENT_THREAD->process->owner_xp;
1507
1508	// get owner process cluster and local pointer
1509	process_t * owner_ptr = GET_PTR( owner_xp );
1510	cxy_t owner_cxy = GET_CXY( owner_xp );
1511
1512	// get number of open file descriptors from fd_array
1513	uint32_t max = hal_remote_l32( XPTR( owner_cxy , &owner_ptr->fd_array.max ));
1514
1515	return ( max == CONFIG_PROCESS_FILE_MAX_NR - 1 );
1516	}
1517
1518	////////////////////////////////////////////
1519	void process_fd_display( xptr_t process_xp )
1520	{
1521	uint32_t fdid;
1522	xptr_t file_xp;
1523	vfs_file_t * file_ptr;
1524	cxy_t file_cxy;
1525	uint32_t file_type;
1526	xptr_t inode_xp;
1527	vfs_inode_t * inode_ptr;
1528
1529	char name[CONFIG_VFS_MAX_NAME_LENGTH];
1530
1531	// get process cluster and local pointer
1532	process_t * process_ptr = GET_PTR( process_xp );
1533	cxy_t process_cxy = GET_CXY( process_xp );
1534
1535	// get process PID
1536	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ));
1537
1538	// get pointers on owner process descriptor
1539	xptr_t owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ));
1540	process_t * owner_ptr = GET_PTR( owner_xp );
1541	cxy_t owner_cxy = GET_CXY( owner_xp );
1542
1543	// get max fdid from owner process descriptor
1544	uint32_t max = hal_remote_l32( XPTR( owner_cxy , &owner_ptr->fd_array.max ));
1545
1546	// get pointers on TXT0 chdev
1547	xptr_t txt0_xp = chdev_dir.txt_tx[0];
1548	cxy_t txt0_cxy = GET_CXY( txt0_xp );
1549	chdev_t * txt0_ptr = GET_PTR( txt0_xp );
1550
1551	// get extended pointer on remote TXT0 lock
1552	xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
1553
1554	// get TXT0 lock
1555	remote_busylock_acquire( lock_xp );
1556
1557	nolock_printk("\n*** fd_array for pid %x in cluster %x / max %d ***\n",
1558	pid, process_cxy, max );
1559
1560	for( fdid = 0 ; fdid <= max ; fdid++ )
1561	{
1562	// get pointers on file descriptor
1563	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[fdid] ));
1564	file_ptr = GET_PTR( file_xp );
1565	file_cxy = GET_CXY( file_xp );
1566
1567	if( file_xp != XPTR_NULL )
1568	{
1569	// get file type
1570	file_type = hal_remote_l32( XPTR( file_cxy , &file_ptr->type ));
1571
1572	// get file name if inode exist
1573	if( (file_type != FILE_TYPE_PIPE) && (file_type != FILE_TYPE_SOCK) )
1574	{
1575	// get inode pointers
1576	inode_ptr = hal_remote_lpt( XPTR( file_cxy , &file_ptr->inode ));
1577	inode_xp = XPTR( file_cxy , inode_ptr );
1578
1579	// get file name
1580	vfs_inode_get_name( inode_xp , name );
1581
1582	// display relevant file descriptor info
1583	nolock_printk(" - %d : type %s / ptr %x (%s)\n",
1584	fdid, process_fd_type_str(file_type), file_ptr, name );
1585	}
1586	else // PIPE or SOCK types
1587	{
1588	// display relevant file decriptor info
1589	nolock_printk(" - %d : type %s / ptr %x\n",
1590	fdid , process_fd_type_str(file_type), file_ptr );
1591	}
1592	}
1593	else
1594	{
1595	nolock_printk(" - %d : empty slot\n", fdid );
1596	}
1597	}
1598
1599	// get TXT0 lock
1600	remote_busylock_acquire( lock_xp );
1601
1602	} // end process_fd_display()
1603
1604	////////////////////////////////////////////////////////////////////////////////////
1605	// Thread related functions
1606	////////////////////////////////////////////////////////////////////////////////////
1607
1608	/////////////////////////////////////////////////////
1609	error_t process_register_thread( process_t * process,
1610	thread_t * thread,
1611	trdid_t * trdid )
1612	{
1613	ltid_t ltid;
1614	ltid_t ltid_min;
1615
1616	bool_t found = false;
1617	lpid_t lpid = LPID_FROM_PID( process->pid );
1618
1619	// check arguments
1620	assert( __FUNCTION__, (process != NULL) , "process argument is NULL" );
1621	assert( __FUNCTION__, (thread != NULL) , "thread argument is NULL" );
1622
1623	// get the lock protecting th_tbl for all threads but the idle thread
1624	if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock );
1625
1626	// compute ltid_min : 0 for an user thread / 1 for a kernel thread
1627	ltid_min = (lpid == 0) ? 1 : 0;
1628
1629	// scan th_tbl
1630	for( ltid = ltid_min ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ )
1631	{
1632	if( process->th_tbl[ltid] == NULL )
1633	{
1634	found = true;
1635	break;
1636	}
1637	}
1638
1639	if( found )
1640	{
1641	// register thread in th_tbl[]
1642	process->th_tbl[ltid] = thread;
1643	process->th_nr++;
1644
1645	// returns trdid
1646	*trdid = TRDID( local_cxy , ltid );
1647	}
1648
1649	// release the lock protecting th_tbl
1650	if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock );
1651
1652	return (found) ? 0 : -1;
1653
1654	} // end process_register_thread()
1655
1656	///////////////////////////////////////////////////
1657	uint32_t process_remove_thread( thread_t * thread )
1658	{
1659	uint32_t count; // number of threads in local process descriptor
1660
1661	// check thread
1662	assert( __FUNCTION__, (thread != NULL) , "thread argument is NULL" );
1663
1664	process_t * process = thread->process;
1665
1666	// get thread local index
1667	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
1668
1669	// get the lock protecting th_tbl[]
1670	rwlock_wr_acquire( &process->th_lock );
1671
1672	// get number of threads
1673	count = process->th_nr;
1674
1675	// check th_nr value
1676	assert( __FUNCTION__, (count > 0) , "process th_nr cannot be 0" );
1677
1678	// remove thread from th_tbl[]
1679	process->th_tbl[ltid] = NULL;
1680	process->th_nr = count-1;
1681
1682	// release lock protecting th_tbl
1683	rwlock_wr_release( &process->th_lock );
1684
1685	return count;
1686
1687	} // end process_remove_thread()
1688
1689	/////////////////////////////////////////////////////////
1690	error_t process_make_fork( xptr_t parent_process_xp,
1691	xptr_t parent_thread_xp,
1692	pid_t * child_pid,
1693	thread_t ** child_thread )
1694	{
1695	process_t * process; // local pointer on child process descriptor
1696	thread_t * thread; // local pointer on child thread descriptor
1697	pid_t new_pid; // process identifier for child process
1698	pid_t parent_pid; // process identifier for parent process
1699	xptr_t ref_xp; // extended pointer on reference process
1700	xptr_t vfs_bin_xp; // extended pointer on .elf file
1701	error_t error;
1702
1703	// get cluster and local pointer for parent process
1704	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
1705	process_t * parent_process_ptr = GET_PTR( parent_process_xp );
1706
1707	// get parent process PID and extended pointer on .elf file
1708	parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid));
1709	vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
1710
1711	// get extended pointer on reference process
1712	ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
1713
1714	// check parent process is the reference process
1715	assert( __FUNCTION__, (parent_process_xp == ref_xp ) ,
1716	"parent process must be the reference process" );
1717
1718	#if DEBUG_PROCESS_MAKE_FORK \|\| DEBUG_PROCESS_ERROR
1719	uint32_t cycle = (uint32_t)hal_get_cycles();
1720	thread_t * this = CURRENT_THREAD;
1721	trdid_t trdid = this->trdid;
1722	pid_t pid = this->process->pid;
1723	#endif
1724
1725	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1726	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1727	printk("\n[%s] thread[%x,%x] enter / cluster %x / cycle %d\n",
1728	__FUNCTION__, pid, trdid, local_cxy, cycle );
1729	#endif
1730
1731	// allocate a process descriptor
1732	process = kmem_alloc( bits_log2(sizeof(process_t)) , AF_ZERO );
1733
1734	if( process == NULL )
1735	{
1736
1737	#if DEBUG_PROCESS_ERROR
1738	printk("\n[ERROR] in %s : thread[%x,%x] cannot allocate process descriptor / cxy %x / cycle %d\n",
1739	__FUNCTION__, pid, trdid, local_cxy, cycle );
1740	#endif
1741	return -1;
1742	}
1743
1744	// allocate a child PID from local cluster
1745	error = cluster_pid_alloc( process , &new_pid );
1746	if( error )
1747	{
1748
1749	#if DEBUG_PROCESS_ERROR
1750	printk("\n[ERROR] in %s : thread[%x,%x] cannot get PID / cxy %x / cycle %d\n",
1751	__FUNCTION__, pid, trdid, local_cxy, cycle );
1752	#endif
1753	kmem_free( process , bits_log2(sizeof(process_t)) );
1754	return -1;
1755	}
1756
1757	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1758	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1759	printk("\n[%s] thread[%x,%x] allocated child_process %x\n",
1760	__FUNCTION__, pid, trdid, new_pid );
1761	#endif
1762
1763	// initializes child process descriptor from parent process descriptor
1764	error = process_reference_init( process,
1765	new_pid,
1766	parent_process_xp );
1767	if( error )
1768	{
1769
1770	#if DEBUG_PROCESS_ERROR
1771	printk("\n[ERROR] in %s : thread[%x,%x] cannot initialize child process / cxy %x / cycle %d\n",
1772	__FUNCTION__, pid, trdid, local_cxy, cycle );
1773	#endif
1774	cluster_pid_release( new_pid );
1775	kmem_free( process , bits_log2(sizeof(process_t)) );
1776	return -1;
1777	}
1778
1779	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1780	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1781	printk("\n[%s] thread[%x,%x] initialized child_process %x\n",
1782	__FUNCTION__, pid, trdid, new_pid );
1783	#endif
1784
1785	// copy VMM from parent descriptor to child descriptor
1786	error = vmm_fork_copy( process,
1787	parent_process_xp );
1788	if( error )
1789	{
1790
1791	#if DEBUG_PROCESS_ERROR
1792	printk("\n[ERROR] in %s : thread[%x,%x] cannot copy VMM to child process / cxy %x / cycle %d\n",
1793	__FUNCTION__, pid, trdid, local_cxy, cycle );
1794	#endif
1795	cluster_pid_release( new_pid );
1796	kmem_free( process , bits_log2(sizeof(process_t)) );
1797	return -1;
1798	}
1799
1800	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1801	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1802	{
1803	printk("\n[%s] thread[%x,%x] copied VMM from parent to child\n",
1804	__FUNCTION__, pid, trdid );
1805	hal_vmm_display( XPTR( local_cxy , process ) , true );
1806	}
1807	#endif
1808
1809	// if parent_process is INIT, or if parent_process is the TXT owner,
1810	// the child_process becomes the owner of its TXT terminal
1811	if( (parent_pid == 1) \|\| process_txt_is_owner( parent_process_xp ) )
1812	{
1813	process_txt_set_ownership( XPTR( local_cxy , process ) );
1814
1815	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1816	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1817	printk("\n[%s] thread[%x,%x] / child_process %x takes TXT ownership\n",
1818	__FUNCTION__ , pid, trdid, new_pid );
1819	#endif
1820
1821	}
1822
1823	// update extended pointer on .elf file
1824	process->vfs_bin_xp = vfs_bin_xp;
1825
1826	// create child thread descriptor from parent thread descriptor
1827	error = thread_user_fork( parent_thread_xp,
1828	process,
1829	&thread );
1830	if( error )
1831	{
1832
1833	#if DEBUG_PROCESS_ERROR
1834	printk("\n[ERROR] in %s : thread[%x,%x] cannot create main thread / cxy %x / cycle %d\n",
1835	__FUNCTION__, pid, trdid, local_cxy, cycle );
1836	#endif
1837	cluster_pid_release( new_pid );
1838	kmem_free( process , bits_log2(sizeof(process_t)) );
1839	return -1;
1840	}
1841
1842	// check main thread LTID
1843	assert( __FUNCTION__, (LTID_FROM_TRDID(thread->trdid) == 0) ,
1844	"main thread must have LTID == 0" );
1845
1846	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1847	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1848	printk("\n[%s] thread[%x,%x] created main thread %x\n",
1849	__FUNCTION__, pid, trdid, thread );
1850	#endif
1851
1852	// set COW flag in DATA, ANON, REMOTE vsegs in parent process VMM
1853	// this includes all parent process copies in all clusters
1854	if( parent_process_cxy == local_cxy ) // reference is local
1855	{
1856	vmm_set_cow( parent_process_ptr );
1857	}
1858	else // reference is remote
1859	{
1860	rpc_vmm_set_cow_client( parent_process_cxy,
1861	parent_process_ptr );
1862	}
1863
1864	// set COW flag in DATA, ANON, REMOTE vsegs for child process VMM
1865	vmm_set_cow( process );
1866
1867	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1868	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1869	printk("\n[%s] thread[%x,%x] set COW in DATA / ANON / REMOTE for parent and child\n",
1870	__FUNCTION__, pid, trdid );
1871	#endif
1872
1873	// get extended pointers on parent children_root, children_lock and children_nr
1874	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
1875	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
1876	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
1877
1878	// register process in parent children list
1879	remote_queuelock_acquire( children_lock_xp );
1880	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1881	hal_remote_atomic_add( children_nr_xp , 1 );
1882	remote_queuelock_release( children_lock_xp );
1883
1884	// return success
1885	*child_thread = thread;
1886	*child_pid = new_pid;
1887
1888	#if DEBUG_PROCESS_MAKE_FORK
1889	cycle = (uint32_t)hal_get_cycles();
1890	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1891	printk("\n[%s] thread[%x,%x] exit / created process %x / cycle %d\n",
1892	__FUNCTION__, pid, trdid, new_pid, cycle );
1893	#endif
1894
1895	return 0;
1896
1897	} // end process_make_fork()
1898
1899	#if DEBUG_PROCESS_MAKE_EXEC
1900
1901	/////////////////////////////////////////////////////////////////////////////////////////
1902	// This static debug function displays the current state of the exec_info structure
1903	// embedded in the calling process descriptor.
1904	//
1905	// WARNING : It can be used after execution of the sys_exec function, but it cannot
1906	// be used after execution of the process_make_exec() function, because the
1907	// kernel pointers have been replaced by user pointers.
1908	/////////////////////////////////////////////////////////////////////////////////////////
1909	static void process_exec_info_display( bool_t args_ok,
1910	bool_t envs_ok )
1911	{
1912	uint32_t i;
1913	char * str; // local pointer on a string
1914
1915	process_t * process = CURRENT_THREAD->process;
1916
1917	// get relevant info from calling process descriptor
1918	pid_t pid = process->pid;
1919
1920	uint32_t args_nr = process->exec_info.args_nr;
1921	char ** args = process->exec_info.args_pointers;
1922
1923	uint32_t envs_nr = process->exec_info.envs_nr;
1924	char ** envs = process->exec_info.envs_pointers;
1925
1926	char * path = process->exec_info.path;
1927
1928	// get pointers on TXT0 chdev
1929	xptr_t txt0_xp = chdev_dir.txt_tx[0];
1930	cxy_t txt0_cxy = GET_CXY( txt0_xp );
1931	chdev_t * txt0_ptr = GET_PTR( txt0_xp );
1932
1933	// get extended pointer on remote TXT0 lock
1934	xptr_t lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
1935
1936	// get TXT0 lock
1937	remote_busylock_acquire( lock_xp );
1938
1939	nolock_printk("\n***** exec_info for process %x in cluster %x / %s\n",
1940	pid , local_cxy , path );
1941
1942	// display arguments if required
1943	if( args_ok )
1944	{
1945	for( i = 0 ; i < args_nr ; i++ )
1946	{
1947	str = args[i];
1948	if( str != NULL) // display pointer and string
1949	nolock_printk(" - &arg[%d] = %x / arg[%d] = <%s>\n", i, str, i, str );
1950	else // display WARNING
1951	nolock_printk(" - unexpected NULL pointer for &arg[%d]\n", i );
1952	}
1953	}
1954
1955	// display env variables if required
1956	if( envs_ok )
1957	{
1958	for( i = 0 ; i < envs_nr ; i++ )
1959	{
1960	str = envs[i];
1961	if( str != NULL) // display pointer and string
1962	nolock_printk(" - &env[%d] = %x / env[%d] = <%s>\n", i, str, i, str );
1963	else // display WARNING
1964	nolock_printk(" - unexpected NULL pointer for &env[%d]\n", i );
1965	}
1966	}
1967
1968	// release TXT0 lock
1969	remote_busylock_release( lock_xp );
1970
1971	} // end process_exec_info_display()
1972
1973	#endif // DEBUG_PROCESS_MAKE_EXEC
1974
1975	/////////////////////////////////
1976	error_t process_make_exec( void )
1977	{
1978	thread_t * this; // local pointer on this thread
1979	process_t * process; // local pointer on this process
1980	pid_t pid; // this process identifier
1981	trdid_t trdid; // this thread identifier
1982	xptr_t ref_xp; // reference process for this process
1983	error_t error; // value returned by called functions
1984	char * elf_path; // path to .elf file
1985	xptr_t file_xp; // extended pointer on .elf file descriptor
1986	uint32_t file_id; // file index in fd_array
1987	vseg_t * vseg; // local pointer on created vseg(s)
1988	uint32_t n; // index for loops
1989
1990	uint32_t args_nr; // actual number of args (from exec_info)
1991	intptr_t args_base; // args vseg base address in user space
1992	uint32_t args_size; // args vseg size (bytes)
1993
1994	uint32_t envs_nr; // actual number of envs (from exec_info)
1995	intptr_t envs_base; // envs vseg base address in user space
1996	uint32_t envs_size; // envs vseg size (bytes)
1997
1998	#if DEBUG_PROCESS_MAKE_EXEC \|\| DEBUG_PROCESS_ERROR
1999	uint32_t cycle = (uint32_t)hal_get_cycles();
2000	#endif
2001
2002	// get calling thread, process, pid, trdid, and ref_xp
2003	this = CURRENT_THREAD;
2004	process = this->process;
2005	pid = process->pid;
2006	trdid = this->trdid;
2007	ref_xp = process->ref_xp;
2008
2009	// get .elf pathname from exec_info structure
2010	elf_path = process->exec_info.path;
2011
2012	#if DEBUG_PROCESS_MAKE_EXEC
2013	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2014	printk("\n[%s] thread[%x,%x] enters for <%s> / cycle %d\n",
2015	__FUNCTION__, pid, trdid, elf_path, cycle );
2016	#endif
2017
2018	// 1. open the file identified by <path>
2019	file_xp = XPTR_NULL;
2020	file_id = 0xFFFFFFFF;
2021	error = vfs_open( process->vfs_root_xp,
2022	elf_path,
2023	ref_xp,
2024	O_RDONLY,
2025	0,
2026	&file_xp,
2027	&file_id );
2028	if( error )
2029	{
2030
2031	#if DEBUG_PROCESS_ERROR
2032	printk("\n[ERROR] in %s : thread[%x,%x] failed to open file <%s> / cycle %d\n",
2033	__FUNCTION__, pid, trdid, elf_path, cycle );
2034	#endif
2035	return -1;
2036	}
2037
2038	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
2039	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2040	printk("\n[%s] thread[%x,%x] opened file <%s>\n",
2041	__FUNCTION__, pid, trdid, elf_path );
2042	#endif
2043
2044	// 2. delete all threads other than this main thread in all clusters
2045	process_sigaction( pid , DELETE_ALL_THREADS );
2046
2047	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
2048	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2049	printk("\n[%s] thread[%x,%x] deleted existing threads\n",
2050	__FUNCTION__, pid, trdid );
2051	#endif
2052
2053	// 3. reset calling process VMM
2054	vmm_user_reset( process );
2055
2056	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2057	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2058	{
2059	printk("\n[%s] thread[%x,%x] completed VMM reset\n",
2060	__FUNCTION__, pid, trdid );
2061	hal_vmm_display( ref_xp , true );
2062	}
2063	#endif
2064
2065	// 4. register the "args" vseg in VSL and map it in GPT, if args_nr != 0.
2066	// As this vseg contains an array of pointers, the kernel pointers
2067	// are replaced by user pointers in new process space.
2068	args_nr = process->exec_info.args_nr;
2069
2070	if( args_nr > 0 )
2071	{
2072	// get args vseg base and size in user space
2073	args_base = CONFIG_VMM_UTILS_BASE << CONFIG_PPM_PAGE_ORDER;
2074	args_size = CONFIG_VMM_ARGS_SIZE << CONFIG_PPM_PAGE_ORDER;
2075
2076	// create and register args vseg in VMM
2077	vseg = vmm_create_vseg( process,
2078	VSEG_TYPE_DATA,
2079	args_base,
2080	args_size,
2081	0, // file_offset unused for DATA type
2082	0, // file_size unused for DATA type
2083	XPTR_NULL, // mapper_xp unused for DATA type
2084	0 ); // cxy unused for DATA type
2085	if( vseg == NULL )
2086	{
2087
2088	#if DEBUG_PROCESS_ERROR
2089	printk("\n[ERROR] in %s : thread[%x,%x] cannot create args vseg for <%s> / cycle %d\n",
2090	__FUNCTION__, pid, trdid, elf_path, cycle );
2091	#endif
2092	return -1;
2093	}
2094
2095	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2096	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2097	{
2098	printk("\n[%s] thread[%x,%x] args vseg registered in new process VSL\n",
2099	__FUNCTION__, pid, trdid );
2100	hal_vmm_display( ref_xp , true );
2101	}
2102	#endif
2103	// map all pages for the "args" vseg
2104	uint32_t fake_attr; // required for hal_gpt_lock_pte()
2105	ppn_t fake_ppn; // required for hal_gpt_lock_pte()
2106
2107	xptr_t base_xp = XPTR( local_cxy , process->exec_info.args_pointers );
2108	xptr_t gpt_xp = XPTR( local_cxy , &process->vmm.gpt );
2109	uint32_t attr = GPT_MAPPED \| GPT_SMALL \| GPT_READABLE \| GPT_USER \| GPT_CACHABLE;
2110	vpn_t vpn = CONFIG_VMM_UTILS_BASE;
2111	ppn_t ppn = ppm_base2ppn( base_xp );
2112
2113	for( n = 0 ; n < CONFIG_VMM_ARGS_SIZE ; n++ )
2114	{
2115	// lock the PTE
2116	if (hal_gpt_lock_pte( gpt_xp , vpn + n , &fake_attr , &fake_ppn ) )
2117	{
2118
2119	#if DEBUG_PROCESS_ERROR
2120	printk("\n[ERROR] in %s : thread[%x,%x] cannot map vpn[%x] of args vseg for <%s> / cycle %d\n",
2121	__FUNCTION__, pid, trdid, vpn + n , elf_path , cycle );
2122	#endif
2123	return -1;
2124	}
2125
2126	// map and unlock the PTE
2127	hal_gpt_set_pte( gpt_xp , vpn + n , attr , ppn + n );
2128	}
2129
2130	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2131	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2132	{
2133	printk("\n[%s] thread[%x,%x] args vseg mapped in new process GPT\n",
2134	__FUNCTION__, pid, trdid );
2135	hal_vmm_display( ref_xp , true );
2136	process_exec_info_display( true , false ); // args & not envs
2137	}
2138	#endif
2139
2140	// build pointer on args buffer in kernel space
2141	char ** k_args = process->exec_info.args_pointers;
2142
2143	// build pointer on args buffer in user space
2144	char u_args = (char )args_base;
2145
2146	// set user space pointers in kernel args buffer
2147	for( n = 0 ; n < args_nr ; n++ )
2148	{
2149	k_args[n] = (char *)((intptr_t)k_args[n] + (intptr_t)u_args - (intptr_t)k_args);
2150	}
2151
2152	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2153	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2154	printk("\n[%s] thread[%x,%x] args user pointers set in exec_info\n",
2155	__FUNCTION__, pid, trdid );
2156	#endif
2157
2158	}
2159
2160	// 5. register the "envs" vseg in VSL and map it in GPT, if envs_nr != 0.
2161	// As this vseg contains an array of pointers, the kernel pointers
2162	// are replaced by user pointers in new process space.
2163
2164	envs_nr = process->exec_info.envs_nr;
2165
2166	if( envs_nr > 0 )
2167	{
2168	// get envs vseg base and size in user space from config
2169	envs_base = (CONFIG_VMM_UTILS_BASE + CONFIG_VMM_ARGS_SIZE) << CONFIG_PPM_PAGE_ORDER;
2170	envs_size = CONFIG_VMM_ENVS_SIZE << CONFIG_PPM_PAGE_ORDER;
2171
2172	// TODO (should be similar to the code for args above)
2173
2174	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2175	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2176	printk("\n[%s] thread[%x,%x] envs user pointers set in exec_info\n",
2177	__FUNCTION__, pid, trdid );
2178	#endif
2179
2180	}
2181
2182
2183	// 6. register code & data vsegs, and entry-point in process VMM,
2184	// register extended pointer on .elf file in process descriptor
2185	error = elf_load_process( file_xp , process );
2186
2187	if( error )
2188	{
2189
2190	#if DEBUG_PROCESS_ERROR
2191	printk("\n[ERROR] in %s : thread[%x,%x] failed to access file <%s> / cycle %d\n",
2192	__FUNCTION__, pid, trdid , elf_path , cycle );
2193	#endif
2194	return -1;
2195	}
2196
2197	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2198	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2199	{
2200	printk("\n[%s] thread[%x,%x] registered code/data vsegs / entry %x\n",
2201	__FUNCTION__, pid, trdid, process->vmm.entry_point );
2202	hal_vmm_display( ref_xp , true );
2203	}
2204	#endif
2205
2206	// 7. allocate an user stack vseg for main thread
2207	vseg = vmm_create_vseg( process,
2208	VSEG_TYPE_STACK,
2209	LTID_FROM_TRDID( trdid ),
2210	0, // length unused
2211	0, // file_offset unused
2212	0, // file_size unused
2213	XPTR_NULL, // mapper_xp unused
2214	local_cxy );
2215	if( vseg == NULL )
2216	{
2217
2218	#if DEBUG_PROCESS_ERROR
2219	printk("\n[ERROR] in %s : thread[%x,%x] failed to set u_stack vseg for <%s> / cycle %d\n",
2220	__FUNCTION__, pid, trdid , elf_path , cycle );
2221	#endif
2222	return -1;
2223	}
2224
2225	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
2226	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
2227	{
2228	printk("\n[%s] thread[%x,%x] registered stack vseg\n",
2229	__FUNCTION__, pid, trdid );
2230	hal_vmm_display( ref_xp , true );
2231	}
2232	#endif
2233
2234	// update user stack in thread descriptor
2235	this->user_stack_vseg = vseg;
2236
2237	// 8. update the main thread descriptor ... and jumps (one way) to user code
2238	thread_user_exec( args_nr , args_base );
2239
2240	if( error )
2241	{
2242
2243	#if DEBUG_PROCESS_ERROR
2244	printk("\n[ERROR] in %s : thread[%x,%x] failed to set main thread for <%s> / cycle %d\n",
2245	__FUNCTION__, pid, trdid , elf_path , cycle );
2246	#endif
2247	return -1;
2248	}
2249
2250	// should not be reached, avoid a warning
2251	return 0;
2252
2253	} // end process_make_exec()
2254
2255
2256	////////////////////////////////////////////////
2257	void process_zero_create( process_t * process,
2258	boot_info_t * info )
2259	{
2260	error_t error;
2261	pid_t pid;
2262
2263	#if DEBUG_PROCESS_ZERO_CREATE
2264	uint32_t cycle = (uint32_t)hal_get_cycles();
2265	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2266	printk("\n[%s] enter / cluster %x / cycle %d\n",
2267	__FUNCTION__, local_cxy, cycle );
2268	#endif
2269
2270	// get pointer on VMM
2271	vmm_t * vmm = &process->vmm;
2272
2273	// get PID from local cluster manager for this kernel process
2274	error = cluster_pid_alloc( process , &pid );
2275
2276	if( error \|\| (LPID_FROM_PID( pid ) != 0) )
2277	{
2278	printk("\n[PANIC] in %s : cannot get valid PID in cluster %x / PID = %x\n",
2279	__FUNCTION__ , local_cxy, pid );
2280	hal_core_sleep();
2281	}
2282
2283	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2284	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2285	printk("\n[%s] allocated pid %x in cluster %x\n", __FUNCTION__, pid, local_cxy );
2286	#endif
2287
2288	// initialize PID, REF_XP, PARENT_XP, and STATE
2289	// the kernel process_zero is its own parent_process,
2290	// reference_process, and owner_process, and cannot be killed...
2291	process->pid = pid;
2292	process->ref_xp = XPTR( local_cxy , process );
2293	process->owner_xp = XPTR( local_cxy , process );
2294	process->parent_xp = XPTR( local_cxy , process );
2295	process->term_state = 0;
2296
2297	// initialize VSL as empty
2298	vmm->vsegs_nr = 0;
2299	xlist_root_init( XPTR( local_cxy , &vmm->vsegs_root ) );
2300
2301	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2302	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2303	printk("\n[%s] initialized VSL empty in cluster %x\n", __FUNCTION__, local_cxy );
2304	#endif
2305
2306	// initialize GPT as empty
2307	error = hal_gpt_create( &vmm->gpt );
2308
2309	if( error )
2310	{
2311	printk("\n[PANIC] in %s : cannot create empty GPT\n", __FUNCTION__ );
2312	hal_core_sleep();
2313	}
2314
2315	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2316	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2317	printk("\n[%s] initialized GPT empty in cluster %x\n", __FUNCTION__, local_cxy );
2318	#endif
2319
2320	// initialize VSL and GPT locks
2321	remote_rwlock_init( XPTR( local_cxy , &vmm->vsl_lock ) , LOCK_VMM_VSL );
2322
2323	// create kernel vsegs in GPT and VSL, as required by the hardware architecture
2324	error = hal_vmm_kernel_init( info );
2325
2326	if( error )
2327	{
2328	printk("\n[PANIC] in %s : cannot create kernel vsegs in VMM\n", __FUNCTION__ );
2329	hal_core_sleep();
2330	}
2331
2332	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2333	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2334	printk("\n[%s] initialized hal specific VMM in cluster%x\n", __FUNCTION__, local_cxy );
2335	hal_vmm_display( XPTR( local_cxy , process ) , true );
2336	#endif
2337
2338	// reset th_tbl[] array and associated fields
2339	uint32_t i;
2340	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
2341	{
2342	process->th_tbl[i] = NULL;
2343	}
2344	process->th_nr = 0;
2345	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
2346
2347	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2348	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2349	printk("\n[%s] initialized th_tbl[] in cluster%x\n", __FUNCTION__, local_cxy );
2350	#endif
2351
2352	// reset children list as empty
2353	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
2354	process->children_nr = 0;
2355	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ),
2356	LOCK_PROCESS_CHILDREN );
2357
2358	#if (DEBUG_PROCESS_ZERO_CREATE & 1)
2359	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2360	printk("\n[%s] initialized children list in cluster%x\n", __FUNCTION__, local_cxy );
2361	#endif
2362
2363	// register kernel process in cluster manager local_list
2364	cluster_process_local_link( process );
2365
2366	hal_fence();
2367
2368	#if DEBUG_PROCESS_ZERO_CREATE
2369	cycle = (uint32_t)hal_get_cycles();
2370	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
2371	printk("\n[%s] exit / cluster %x / cycle %d\n",
2372	__FUNCTION__, local_cxy, cycle );
2373	#endif
2374
2375	} // end process_zero_create()
2376
2377	////////////////////////////////
2378	void process_init_create( void )
2379	{
2380	process_t * process; // local pointer on process descriptor
2381	pid_t pid; // process_init identifier
2382	thread_t * thread; // local pointer on main thread
2383	pthread_attr_t attr; // main thread attributes
2384	lid_t lid; // selected core local index for main thread
2385	xptr_t file_xp; // extended pointer on .elf file descriptor
2386	uint32_t file_id; // file index in fd_array
2387	error_t error;
2388
2389	#if DEBUG_PROCESS_INIT_CREATE
2390	thread_t * this = CURRENT_THREAD;
2391	uint32_t cycle = (uint32_t)hal_get_cycles();
2392	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2393	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
2394	__FUNCTION__, this->process->pid, this->trdid, cycle );
2395	#endif
2396
2397	// allocates memory for process descriptor from local cluster
2398	process = kmem_alloc( bits_log2(sizeof(process_t)) , AF_ZERO );
2399	if( process == NULL )
2400	{
2401	printk("\n[PANIC] in %s : cannot allocate process\n", __FUNCTION__ );
2402	hal_core_sleep();
2403	}
2404
2405	// set the CWD and VFS_ROOT fields in process descriptor
2406	process->cwd_xp = process_zero.vfs_root_xp;
2407	process->vfs_root_xp = process_zero.vfs_root_xp;
2408
2409	// get PID from local cluster
2410	error = cluster_pid_alloc( process , &pid );
2411	if( error )
2412	{
2413	printk("\n[PANIC] in %s : cannot allocate PID\n", __FUNCTION__ );
2414	hal_core_sleep();
2415	}
2416	if( pid != 1 )
2417	{
2418	printk("\n[PANIC] in %s : process PID must be 0x1\n", __FUNCTION__ );
2419	hal_core_sleep();
2420	}
2421
2422	// initialize process descriptor / parent is local process_zero
2423	error = process_reference_init( process,
2424	pid,
2425	XPTR( local_cxy , &process_zero ) );
2426	if( error )
2427	{
2428	printk("\n[PANIC] in %s : cannot initialize process\n", __FUNCTION__ );
2429	hal_core_sleep();
2430	}
2431
2432	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2433	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2434	printk("\n[%s] thread[%x,%x] initialized process descriptor\n",
2435	__FUNCTION__, this->process->pid, this->trdid );
2436	#endif
2437
2438	// open the file identified by CONFIG_PROCESS_INIT_PATH
2439	file_xp = XPTR_NULL;
2440	file_id = -1;
2441	error = vfs_open( process->vfs_root_xp,
2442	CONFIG_PROCESS_INIT_PATH,
2443	XPTR( local_cxy , process ),
2444	O_RDONLY,
2445	0,
2446	&file_xp,
2447	&file_id );
2448	if( error )
2449	{
2450	printk("\n[PANIC] in %s : cannot open file <%s>\n",
2451	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
2452	hal_core_sleep();
2453	}
2454
2455	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2456	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2457	printk("\n[%s] thread[%x,%x] open .elf file decriptor\n",
2458	__FUNCTION__, this->process->pid, this->trdid );
2459	#endif
2460
2461	// register "code" and "data" vsegs as well as entry-point
2462	// in process VMM, using information contained in the elf file.
2463	error = elf_load_process( file_xp , process );
2464
2465	if( error )
2466	{
2467	printk("\n[PANIC] in %s : cannot access file <%s>\n",
2468	__FUNCTION__, CONFIG_PROCESS_INIT_PATH );
2469	hal_core_sleep();
2470	}
2471
2472
2473	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2474	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2475	{
2476	printk("\n[%s] thread[%x,%x] registered code/data vsegs in VMM\n",
2477	__FUNCTION__, this->process->pid, this->trdid );
2478	hal_vmm_display( XPTR( local_cxy , process ) , true );
2479	}
2480	#endif
2481
2482	// get extended pointers on process_zero children_root, children_lock
2483	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
2484	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
2485
2486	// take lock protecting kernel process children list
2487	remote_queuelock_acquire( children_lock_xp );
2488
2489	// register process INIT in parent local process_zero
2490	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
2491	hal_atomic_add( &process_zero.children_nr , 1 );
2492
2493	// release lock protecting kernel process children list
2494	remote_queuelock_release( children_lock_xp );
2495
2496	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2497	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2498	printk("\n[%s] thread[%x,%x] registered init process in parent\n",
2499	__FUNCTION__, this->process->pid, this->trdid );
2500	#endif
2501
2502	// select a core in local cluster to execute the main thread
2503	lid = cluster_select_local_core( local_cxy );
2504
2505	// initialize pthread attributes for main thread
2506	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
2507	attr.cxy = local_cxy;
2508	attr.lid = lid;
2509
2510	// create and initialize thread descriptor
2511	error = thread_user_create( pid,
2512	(void *)process->vmm.entry_point,
2513	NULL,
2514	&attr,
2515	&thread );
2516
2517	if( error )
2518	{
2519	printk("\n[PANIC] in %s : cannot create main thread\n", __FUNCTION__ );
2520	hal_core_sleep();
2521	}
2522	if( thread->trdid != 0 )
2523	{
2524	printk("\n[PANIC] in %s : bad main thread trdid\n", __FUNCTION__ );
2525	hal_core_sleep();
2526	}
2527
2528	#if(DEBUG_PROCESS_INIT_CREATE & 1)
2529	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2530	printk("\n[%s] thread[%x,%x] created main thread\n",
2531	__FUNCTION__, this->process->pid, this->trdid );
2532	#endif
2533
2534	// activate thread
2535	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
2536
2537	hal_fence();
2538
2539	#if DEBUG_PROCESS_INIT_CREATE
2540	cycle = (uint32_t)hal_get_cycles();
2541	if( DEBUG_PROCESS_INIT_CREATE < cycle )
2542	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
2543	__FUNCTION__, this->process->pid, this->trdid, cycle );
2544	#endif
2545
2546	} // end process_init_create()
2547
2548	///////////////////////////////////////////////////
2549	uint32_t process_build_string( xptr_t process_xp,
2550	char * buffer,
2551	uint32_t size )
2552	{
2553	int32_t length; // actual length of the string
2554
2555	process_t * process_ptr; // process descriptor local pointer
2556	cxy_t process_cxy; // process descriptor cluster identifier
2557
2558	xptr_t parent_xp; // extended pointer on parent process
2559	process_t * parent_ptr; // parent process local pointer
2560	cxy_t parent_cxy; // parent process cluster identifier
2561
2562	xptr_t owner_xp; // extended pointer on owner process
2563	process_t * owner_ptr; // owner process local pointer
2564	cxy_t owner_cxy; // owner process cluster identifier
2565
2566	pid_t pid; // process identifier
2567	pid_t ppid; // parent process identifier
2568	lpid_t lpid; // local process identifier
2569	uint32_t state; // terminaison state
2570	uint32_t th_nr; // number of threads
2571
2572	xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor
2573	xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev
2574	chdev_t * txt_chdev_ptr;
2575	cxy_t txt_chdev_cxy;
2576	xptr_t txt_owner_xp; // extended pointer on TXT owner process
2577
2578	xptr_t elf_file_xp; // extended pointer on .elf file
2579	cxy_t elf_file_cxy;
2580	vfs_file_t * elf_file_ptr;
2581	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
2582
2583	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
2584	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
2585
2586	assert( __FUNCTION__ , (size >= 80 ) , "buffer size too small" );
2587
2588	// get cluster and local pointer on process
2589	process_ptr = GET_PTR( process_xp );
2590	process_cxy = GET_CXY( process_xp );
2591
2592	// get process PID, LPID, and state
2593	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2594	lpid = LPID_FROM_PID( pid );
2595	state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) );
2596
2597	// get process PPID
2598	parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
2599	parent_cxy = GET_CXY( parent_xp );
2600	parent_ptr = GET_PTR( parent_xp );
2601	ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
2602
2603	// get number of threads
2604	th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) );
2605
2606	// get pointers on owner process descriptor
2607	owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) );
2608	owner_cxy = GET_CXY( owner_xp );
2609	owner_ptr = GET_PTR( owner_xp );
2610
2611	// get process TXT name and .elf name
2612	if( lpid ) // user process
2613	{
2614	// get extended pointer on file descriptor associated to TXT_RX
2615	txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) );
2616
2617	assert( __FUNCTION__, (txt_file_xp != XPTR_NULL) ,
2618	"process must be attached to one TXT terminal" );
2619
2620	// get TXT_RX chdev pointers
2621	txt_chdev_xp = chdev_from_file( txt_file_xp );
2622	txt_chdev_cxy = GET_CXY( txt_chdev_xp );
2623	txt_chdev_ptr = GET_PTR( txt_chdev_xp );
2624
2625	// get TXT_RX name and ownership
2626	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
2627	XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) );
2628
2629	// get TXT_owner process
2630	txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy,
2631	&txt_chdev_ptr->ext.txt.owner_xp ) );
2632	// get process .elf name
2633	elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
2634	elf_file_cxy = GET_CXY( elf_file_xp );
2635	elf_file_ptr = GET_PTR( elf_file_xp );
2636	elf_inode_ptr = hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
2637	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
2638	}
2639	else // kernel process_zero
2640	{
2641	// TXT name and .elf name are not registered in kernel process
2642	strcpy( txt_name , "txt0_rx" );
2643	txt_owner_xp = process_xp;
2644	strcpy( elf_name , "kernel.elf" );
2645	}
2646
2647	// display process info
2648	if( txt_owner_xp == process_xp )
2649	{
2650	length = snprintk( buffer, size,
2651	"PID %X \| %s (FG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2652	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2653	}
2654	else
2655	{
2656	length = snprintk( buffer, size,
2657	"PID %X \| %s (BG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
2658	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
2659	}
2660
2661	// check length
2662	if( (length < 0) )
2663	{
2664	length = snprintk( buffer , size ,
2665	"buffer too small for process %x in cluster %x", pid , process_cxy );
2666	}
2667
2668	return length;
2669
2670	} // end process_build_string()
2671
2672	/////////////////////////////////////////
2673	void process_display( xptr_t process_xp )
2674	{
2675	char buffer[CONFIG_PROCESS_DISPLAY_BUF_SIZE];
2676
2677	// build the string to be displayed
2678	process_build_string( process_xp,
2679	buffer,
2680	CONFIG_PROCESS_DISPLAY_BUF_SIZE );
2681	// display the string
2682	nolock_puts( buffer );
2683
2684	} // end process_display()
2685
2686
2687	////////////////////////////////////////////////////////////////////////////////////////
2688	// Terminals related functions
2689	////////////////////////////////////////////////////////////////////////////////////////
2690
2691	//////////////////////////////////
2692	uint32_t process_txt_alloc( void )
2693	{
2694	uint32_t index; // TXT terminal index
2695	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2696	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2697	cxy_t chdev_cxy; // TXT_RX chdev cluster
2698	xptr_t root_xp; // extended pointer on owner field in chdev
2699
2700	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
2701	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
2702	{
2703	// get pointers on TXT_RX[index]
2704	chdev_xp = chdev_dir.txt_rx[index];
2705	chdev_cxy = GET_CXY( chdev_xp );
2706	chdev_ptr = GET_PTR( chdev_xp );
2707
2708	// get extended pointer on root of attached process
2709	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2710
2711	// return free TXT index if found
2712	if( xlist_is_empty( root_xp ) ) return index;
2713	}
2714
2715	assert( __FUNCTION__, false , "no free TXT terminal found" );
2716
2717	return -1;
2718
2719	} // end process_txt_alloc()
2720
2721	/////////////////////////////////////////////
2722	void process_txt_attach( xptr_t process_xp,
2723	uint32_t txt_id )
2724	{
2725	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2726	cxy_t chdev_cxy; // TXT_RX chdev cluster
2727	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2728	xptr_t root_xp; // extended pointer on list root in chdev
2729	xptr_t lock_xp; // extended pointer on list lock in chdev
2730
2731	process_t * process_ptr = GET_PTR(process_xp );
2732	cxy_t process_cxy = GET_CXY(process_xp );
2733
2734	// check process is in owner cluster
2735	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ))),
2736	"process descriptor not in owner cluster" );
2737
2738	// check terminal index
2739	assert( __FUNCTION__, (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2740	"illegal TXT terminal index" );
2741
2742	// get pointers on TXT_RX[txt_id] chdev
2743	chdev_xp = chdev_dir.txt_rx[txt_id];
2744	chdev_cxy = GET_CXY( chdev_xp );
2745	chdev_ptr = GET_PTR( chdev_xp );
2746
2747	// get extended pointer on root & lock of attached process list
2748	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2749	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2750
2751	// get lock protecting list of processes attached to TXT
2752	remote_busylock_acquire( lock_xp );
2753
2754	// insert owner process in list of attached processes to same TXT
2755	xlist_add_last( root_xp , XPTR( process_cxy , &process_ptr->txt_list ) );
2756
2757	// release lock protecting list of processes attached to TXT
2758	remote_busylock_release( lock_xp );
2759
2760	#if DEBUG_PROCESS_TXT
2761	thread_t * this = CURRENT_THREAD;
2762	uint32_t cycle = (uint32_t)hal_get_cycles();
2763	if( DEBUG_PROCESS_TXT < cycle )
2764	printk("\n[%s] thread[%x,%x] attached process %x to TXT %d / cycle %d\n",
2765	__FUNCTION__, this->process->pid, this->trdid,
2766	hal_remote_l32( XPTR( process_cxy , &process_ptr->pid, txt_id , cycle );
2767	#endif
2768
2769	} // end process_txt_attach()
2770
2771	/////////////////////////////////////////////
2772	void process_txt_detach( xptr_t process_xp )
2773	{
2774	process_t * process_ptr; // local pointer on process in owner cluster
2775	cxy_t process_cxy; // process owner cluster
2776	pid_t process_pid; // process identifier
2777	xptr_t file_xp; // extended pointer on stdin file
2778	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
2779	cxy_t chdev_cxy; // TXT_RX chdev cluster
2780	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
2781	xptr_t lock_xp; // extended pointer on list lock in chdev
2782
2783	// get process cluster, local pointer, and PID
2784	process_cxy = GET_CXY( process_xp );
2785	process_ptr = GET_PTR( process_xp );
2786	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2787
2788	// check process descriptor in owner cluster
2789	assert( __FUNCTION__, (CXY_FROM_PID( process_pid ) == process_cxy ) ,
2790	"process descriptor not in owner cluster" );
2791
2792	// release TXT ownership (does nothing if not TXT owner)
2793	process_txt_transfer_ownership( process_xp );
2794
2795	// get extended pointer on process stdin pseudo file
2796	file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2797
2798	// get pointers on TXT_RX chdev
2799	chdev_xp = chdev_from_file( file_xp );
2800	chdev_cxy = GET_CXY( chdev_xp );
2801	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
2802
2803	// get extended pointer on lock protecting attached process list
2804	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2805
2806	// get lock protecting list of processes attached to TXT
2807	remote_busylock_acquire( lock_xp );
2808
2809	// unlink process from attached process list
2810	xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) );
2811
2812	// release lock protecting list of processes attached to TXT
2813	remote_busylock_release( lock_xp );
2814
2815	#if DEBUG_PROCESS_TXT
2816	thread_t * this = CURRENT_THREAD;
2817	uint32_t cycle = (uint32_t)hal_get_cycles();
2818	uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
2819	if( DEBUG_PROCESS_TXT < cycle )
2820	printk("\n[%s] thread[%x,%x] detached process %x from TXT%d / cycle %d\n",
2821	__FUNCTION__, this->process->pid, this->trdid, process_pid, txt_id, cycle );
2822	#endif
2823
2824	} // end process_txt_detach()
2825
2826	///////////////////////////////////////////////////
2827	uint32_t process_txt_get_index( xptr_t process_xp )
2828	{
2829
2830	// get target process cluster and local pointer
2831	process_t * process_ptr = GET_PTR( process_xp );
2832	cxy_t process_cxy = GET_CXY( process_xp );
2833
2834	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp))),
2835	"process descriptor not in owner cluster" );
2836
2837	// get extended pointer on STDIN pseudo file in owner process descriptor
2838	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0]));
2839
2840	assert( __FUNCTION__, (file_xp != XPTR_NULL),
2841	"STDIN pseudo-file undefined in fd_array for process %x\n",
2842	hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ) );
2843
2844	// get extended pointer on TXT chdev
2845	xptr_t chdev_xp = chdev_from_file( file_xp );
2846
2847	assert( __FUNCTION__, (chdev_xp != XPTR_NULL),
2848	"chdev undefined for STDIN pseudo-file of process %x\n",
2849	hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) ) );
2850
2851	// get cluster and local pointer on chdev
2852	cxy_t chdev_cxy = GET_CXY( chdev_xp );
2853	chdev_t * chdev_ptr = GET_PTR( chdev_xp );
2854
2855	// get parent TXT terminal index
2856	return hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
2857
2858	} // end process_txt_get_index()
2859
2860	///////////////////////////////////////////////////
2861	void process_txt_set_ownership( xptr_t process_xp )
2862	{
2863	process_t * process_ptr;
2864	cxy_t process_cxy;
2865	xptr_t file_xp;
2866	xptr_t txt_xp;
2867	chdev_t * txt_ptr;
2868	cxy_t txt_cxy;
2869
2870	// get pointers on process in owner cluster
2871	process_cxy = GET_CXY( process_xp );
2872	process_ptr = GET_PTR( process_xp );
2873
2874	// check owner cluster
2875	assert( __FUNCTION__, (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ))),
2876	"process descriptor not in owner cluster" );
2877
2878	// get extended pointer on stdin pseudo file
2879	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2880
2881	// get pointers on TXT chdev
2882	txt_xp = chdev_from_file( file_xp );
2883	txt_cxy = GET_CXY( txt_xp );
2884	txt_ptr = GET_PTR( txt_xp );
2885
2886	// set owner field in TXT chdev
2887	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
2888
2889	#if DEBUG_PROCESS_TXT
2890	thread_t * this = CURRENT_THREAD;
2891	uint32_t cycle = (uint32_t)hal_get_cycles();
2892	uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2893	if( DEBUG_PROCESS_TXT < cycle )
2894	printk("\n[%s] thread[%x,%x] give TXT%d ownership to process / cycle %d\n",
2895	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2896	#endif
2897
2898	} // end process_txt_set ownership()
2899
2900	////////////////////////////////////////////////////////
2901	void process_txt_transfer_ownership( xptr_t process_xp )
2902	{
2903	process_t * process_ptr; // local pointer on process releasing ownership
2904	cxy_t process_cxy; // process cluster
2905	pid_t process_pid; // process identifier
2906	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
2907	xptr_t txt_xp; // extended pointer on TXT_RX chdev
2908	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
2909	cxy_t txt_cxy; // cluster of TXT_RX chdev
2910	uint32_t txt_id; // TXT_RX channel
2911	xptr_t owner_xp; // extended pointer on current TXT_RX owner
2912	xptr_t root_xp; // extended pointer on root of attached process list
2913	xptr_t lock_xp; // extended pointer on lock protecting attached process list
2914	xptr_t iter_xp; // iterator for xlist
2915	xptr_t current_xp; // extended pointer on current process
2916	bool_t found;
2917
2918	#if DEBUG_PROCESS_TXT
2919	thread_t * this = CURRENT_THREAD;
2920	uint32_t cycle;
2921	#endif
2922
2923	// get pointers on target process
2924	process_cxy = GET_CXY( process_xp );
2925	process_ptr = GET_PTR( process_xp );
2926	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2927
2928	// check owner cluster
2929	assert( __FUNCTION__, (process_cxy == CXY_FROM_PID( process_pid )) ,
2930	"process descriptor not in owner cluster" );
2931
2932	// get extended pointer on stdin pseudo file
2933	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2934
2935	// get pointers on TXT chdev
2936	txt_xp = chdev_from_file( file_xp );
2937	txt_cxy = GET_CXY( txt_xp );
2938	txt_ptr = GET_PTR( txt_xp );
2939
2940	// get relevant infos from chdev descriptor
2941	owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2942	txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2943
2944	// transfer ownership only if target process is the TXT owner
2945	if( (owner_xp == process_xp) && (txt_id > 0) )
2946	{
2947	// get extended pointers on root and lock of attached processes list
2948	root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root );
2949	lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock );
2950
2951	if( process_get_ppid( process_xp ) != 1 ) // target process is not KSH
2952	{
2953	// get lock
2954	remote_busylock_acquire( lock_xp );
2955
2956	// scan attached process list to find KSH process
2957	found = false;
2958	for( iter_xp = hal_remote_l64( root_xp ) ;
2959	(iter_xp != root_xp) && (found == false) ;
2960	iter_xp = hal_remote_l64( iter_xp ) )
2961	{
2962	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2963
2964	if( process_get_ppid( current_xp ) == 1 ) // current is KSH
2965	{
2966	// set owner field in TXT chdev
2967	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2968
2969	#if DEBUG_PROCESS_TXT
2970	cycle = (uint32_t)hal_get_cycles();
2971	if( DEBUG_PROCESS_TXT < cycle )
2972	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to KSH / cycle %d\n",
2973	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2974	#endif
2975	found = true;
2976	}
2977	}
2978
2979	// release lock
2980	remote_busylock_release( lock_xp );
2981
2982	// It must exist a KSH process for each user TXT channel
2983	assert( __FUNCTION__, (found == true), "KSH process not found for TXT%d", txt_id );
2984
2985	}
2986	else // target process is KSH
2987	{
2988	// get lock
2989	remote_busylock_acquire( lock_xp );
2990
2991	// scan attached process list to find another process
2992	found = false;
2993	for( iter_xp = hal_remote_l64( root_xp ) ;
2994	(iter_xp != root_xp) && (found == false) ;
2995	iter_xp = hal_remote_l64( iter_xp ) )
2996	{
2997	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2998
2999	if( current_xp != process_xp ) // current is not KSH
3000	{
3001	// set owner field in TXT chdev
3002	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
3003
3004	#if DEBUG_PROCESS_TXT
3005	cycle = (uint32_t)hal_get_cycles();
3006	cxy_t current_cxy = GET_CXY( current_xp );
3007	process_t * current_ptr = GET_PTR( current_xp );
3008	uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
3009	if( DEBUG_PROCESS_TXT < cycle )
3010	printk("\n[%s] thread[%x,%x] transfered TXT%d ownership to process %x / cycle %d\n",
3011	__FUNCTION__,this->process->pid, this->trdid, txt_id, new_pid, cycle );
3012	#endif
3013	found = true;
3014	}
3015	}
3016
3017	// release lock
3018	remote_busylock_release( lock_xp );
3019
3020	// no more owner for TXT if no other process found
3021	if( found == false )
3022	{
3023	// set owner field in TXT chdev
3024	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL );
3025
3026	#if DEBUG_PROCESS_TXT
3027	cycle = (uint32_t)hal_get_cycles();
3028	if( DEBUG_PROCESS_TXT < cycle )
3029	printk("\n[%s] thread[%x,%x] released TXT%d (no attached process) / cycle %d\n",
3030	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
3031	#endif
3032	}
3033	}
3034	}
3035	else
3036	{
3037
3038	#if DEBUG_PROCESS_TXT
3039	cycle = (uint32_t)hal_get_cycles();
3040	if( DEBUG_PROCESS_TXT < cycle )
3041	printk("\n[%s] thread[%x,%x] does nothing for process %x (not TXT owner) / cycle %d\n",
3042	__FUNCTION__, this->process->pid, this->trdid, process_pid, cycle );
3043	#endif
3044
3045	}
3046
3047	} // end process_txt_transfer_ownership()
3048
3049
3050	////////////////////////////////////////////////
3051	bool_t process_txt_is_owner( xptr_t process_xp )
3052	{
3053	// get local pointer and cluster of process in owner cluster
3054	cxy_t process_cxy = GET_CXY( process_xp );
3055	process_t * process_ptr = GET_PTR( process_xp );
3056
3057	// check calling thread execute in target process owner cluster
3058	pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
3059	assert( __FUNCTION__, (process_cxy == CXY_FROM_PID( process_pid )) ,
3060	"process descriptor not in owner cluster" );
3061
3062	// get extended pointer on stdin pseudo file
3063	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
3064
3065	// get pointers on TXT chdev
3066	xptr_t txt_xp = chdev_from_file( file_xp );
3067	cxy_t txt_cxy = GET_CXY( txt_xp );
3068	chdev_t * txt_ptr = GET_PTR( txt_xp );
3069
3070	// get extended pointer on TXT_RX owner process
3071	xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
3072
3073	return (process_xp == owner_xp);
3074
3075	} // end process_txt_is_owner()
3076
3077	////////////////////////////////////////////////
3078	xptr_t process_txt_get_owner( uint32_t channel )
3079	{
3080	xptr_t txt_rx_xp = chdev_dir.txt_rx[channel];
3081	cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp );
3082	chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp );
3083
3084	return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) );
3085
3086	} // end process_txt_get_owner()
3087
3088	///////////////////////////////////////////
3089	void process_txt_display( uint32_t txt_id )
3090	{
3091	xptr_t chdev_xp;
3092	cxy_t chdev_cxy;
3093	chdev_t * chdev_ptr;
3094	xptr_t root_xp;
3095	xptr_t lock_xp;
3096	xptr_t current_xp;
3097	xptr_t iter_xp;
3098	cxy_t txt0_cxy;
3099	chdev_t * txt0_ptr;
3100	xptr_t txt0_xp;
3101	xptr_t txt0_lock_xp;
3102
3103	assert( __FUNCTION__, (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
3104	"illegal TXT terminal index" );
3105
3106	// get pointers on TXT0 chdev
3107	txt0_xp = chdev_dir.txt_tx[0];
3108	txt0_cxy = GET_CXY( txt0_xp );
3109	txt0_ptr = GET_PTR( txt0_xp );
3110
3111	// get extended pointer on TXT0 lock
3112	txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
3113
3114	// get pointers on TXT_RX[txt_id] chdev
3115	chdev_xp = chdev_dir.txt_rx[txt_id];
3116	chdev_cxy = GET_CXY( chdev_xp );
3117	chdev_ptr = GET_PTR( chdev_xp );
3118
3119	// get extended pointer on root & lock of attached process list
3120	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
3121	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
3122
3123	// get lock on attached process list
3124	remote_busylock_acquire( lock_xp );
3125
3126	// get TXT0 lock in busy waiting mode
3127	remote_busylock_acquire( txt0_lock_xp );
3128
3129	// display header
3130	nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n",
3131	txt_id , (uint32_t)hal_get_cycles() );
3132
3133	// scan attached process list
3134	XLIST_FOREACH( root_xp , iter_xp )
3135	{
3136	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
3137	process_display( current_xp );
3138	}
3139
3140	// release TXT0 lock in busy waiting mode
3141	remote_busylock_release( txt0_lock_xp );
3142
3143	// release lock on attached process list
3144	remote_busylock_release( lock_xp );
3145
3146	} // end process_txt_display

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source: trunk/kernel/kern/process.c

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