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source: trunk/kernel/kern/process.c @ 623

Last change on this file since 623 was 623, checked in by alain, 7 years ago
Introduce three new types of vsegs (KCODE,KDATA,KDEV) to map the kernel vsegs in the process VSL and GPT. This now used by both the TSAR and the I86 architectures.
File size: 78.7 KB

Line
1	/*
2	* process.c - process related functions definition.
3	*
4	* Authors Ghassan Almaless (2008,2009,2010,2011,2012)
5	* Mohamed Lamine Karaoui (2015)
6	* Alain Greiner (2016,2017,2018,2019)
7	*
8	* Copyright (c) UPMC Sorbonne Universites
9	*
10	* This file is part of ALMOS-MKH.
11	*
12	* ALMOS-MKH is free software; you can redistribute it and/or modify it
13	* under the terms of the GNU General Public License as published by
14	* the Free Software Foundation; version 2.0 of the License.
15	*
16	* ALMOS-MKH is distributed in the hope that it will be useful, but
17	* WITHOUT ANY WARRANTY; without even the implied warranty of
18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19	* General Public License for more details.
20	*
21	* You should have received a copy of the GNU General Public License
22	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
23	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
24	*/
25
26	#include <kernel_config.h>
27	#include <hal_kernel_types.h>
28	#include <hal_remote.h>
29	#include <hal_uspace.h>
30	#include <hal_irqmask.h>
31	#include <hal_vmm.h>
32	#include <errno.h>
33	#include <printk.h>
34	#include <memcpy.h>
35	#include <bits.h>
36	#include <kmem.h>
37	#include <page.h>
38	#include <vmm.h>
39	#include <vfs.h>
40	#include <core.h>
41	#include <thread.h>
42	#include <chdev.h>
43	#include <list.h>
44	#include <string.h>
45	#include <scheduler.h>
46	#include <busylock.h>
47	#include <queuelock.h>
48	#include <remote_queuelock.h>
49	#include <rwlock.h>
50	#include <remote_rwlock.h>
51	#include <dqdt.h>
52	#include <cluster.h>
53	#include <ppm.h>
54	#include <boot_info.h>
55	#include <process.h>
56	#include <elf.h>
57	#include <syscalls.h>
58	#include <shared_syscalls.h>
59
60	//////////////////////////////////////////////////////////////////////////////////////////
61	// Extern global variables
62	//////////////////////////////////////////////////////////////////////////////////////////
63
64	extern process_t process_zero; // allocated in kernel_init.c
65	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
66
67	//////////////////////////////////////////////////////////////////////////////////////////
68	// Process initialisation related functions
69	//////////////////////////////////////////////////////////////////////////////////////////
70
71	/////////////////////////////////
72	process_t * process_alloc( void )
73	{
74	kmem_req_t req;
75
76	req.type = KMEM_PROCESS;
77	req.size = sizeof(process_t);
78	req.flags = AF_KERNEL;
79
80	return (process_t *)kmem_alloc( &req );
81	}
82
83	////////////////////////////////////////
84	void process_free( process_t * process )
85	{
86	kmem_req_t req;
87
88	req.type = KMEM_PROCESS;
89	req.ptr = process;
90	kmem_free( &req );
91	}
92
93	/////////////////////////////////////////////////
94	void process_reference_init( process_t * process,
95	pid_t pid,
96	xptr_t parent_xp )
97	{
98	xptr_t process_xp;
99	cxy_t parent_cxy;
100	process_t * parent_ptr;
101	xptr_t stdin_xp;
102	xptr_t stdout_xp;
103	xptr_t stderr_xp;
104	uint32_t stdin_id;
105	uint32_t stdout_id;
106	uint32_t stderr_id;
107	error_t error;
108	uint32_t txt_id;
109	char rx_path[40];
110	char tx_path[40];
111	xptr_t file_xp;
112	xptr_t chdev_xp;
113	chdev_t * chdev_ptr;
114	cxy_t chdev_cxy;
115	pid_t parent_pid;
116
117	// build extended pointer on this reference process
118	process_xp = XPTR( local_cxy , process );
119
120	// get parent process cluster and local pointer
121	parent_cxy = GET_CXY( parent_xp );
122	parent_ptr = GET_PTR( parent_xp );
123
124	// get parent_pid
125	parent_pid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
126
127	#if DEBUG_PROCESS_REFERENCE_INIT
128	thread_t * this = CURRENT_THREAD;
129	uint32_t cycle = (uint32_t)hal_get_cycles();
130	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
131	printk("\n[%s] thread[%x,%x] enter to initalialize process %x / cycle %d\n",
132	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
133	#endif
134
135	// initialize pid, ref_xp, parent_xp, owner_xp, term_state fields
136	process->pid = pid;
137	process->ref_xp = XPTR( local_cxy , process );
138	process->owner_xp = XPTR( local_cxy , process );
139	process->parent_xp = parent_xp;
140	process->term_state = 0;
141
142	// initialize VFS root inode and CWD inode
143	process->vfs_root_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->vfs_root_xp ) );
144	process->cwd_xp = hal_remote_l64( XPTR( parent_cxy, &parent_ptr->cwd_xp ) );
145
146	// initialize vmm as empty
147	error = vmm_init( process );
148
149	assert( (error == 0) , "cannot initialize VMM\n" );
150
151	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
152	cycle = (uint32_t)hal_get_cycles();
153	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
154	printk("\n[%s] thread[%x,%x] / vmm empty for process %x / cycle %d\n",
155	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
156	#endif
157
158	// initialize fd_array as empty
159	process_fd_init( process );
160
161	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
162	if( (pid == 1) \|\| (parent_pid == 1) ) // INIT or KSH process
163	{
164	// select a TXT channel
165	if( pid == 1 ) txt_id = 0; // INIT
166	else txt_id = process_txt_alloc(); // KSH
167
168	// attach process to TXT
169	process_txt_attach( process , txt_id );
170
171	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
172	cycle = (uint32_t)hal_get_cycles();
173	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
174	printk("\n[%s] thread[%x,%x] / process %x attached to TXT%d / cycle %d\n",
175	__FUNCTION__, parent_pid, this->trdid, pid, txt_id, cycle );
176	#endif
177	// build path to TXT_RX[i] and TXT_TX[i] chdevs
178	snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
179	snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
180
181	// create stdin pseudo file
182	error = vfs_open( process->vfs_root_xp,
183	rx_path,
184	process_xp,
185	O_RDONLY,
186	0, // FIXME chmod
187	&stdin_xp,
188	&stdin_id );
189
190	assert( (error == 0) , "cannot open stdin pseudo file" );
191	assert( (stdin_id == 0) , "stdin index must be 0" );
192
193	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
194	cycle = (uint32_t)hal_get_cycles();
195	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
196	printk("\n[%s] thread[%x,%x] / stdin open for process %x / cycle %d\n",
197	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
198	#endif
199
200	// create stdout pseudo file
201	error = vfs_open( process->vfs_root_xp,
202	tx_path,
203	process_xp,
204	O_WRONLY,
205	0, // FIXME chmod
206	&stdout_xp,
207	&stdout_id );
208
209	assert( (error == 0) , "cannot open stdout pseudo file" );
210	assert( (stdout_id == 1) , "stdout index must be 1" );
211
212	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
213	cycle = (uint32_t)hal_get_cycles();
214	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
215	printk("\n[%s] thread[%x,%x] / stdout open for process %x / cycle %d\n",
216	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
217	#endif
218
219	// create stderr pseudo file
220	error = vfs_open( process->vfs_root_xp,
221	tx_path,
222	process_xp,
223	O_WRONLY,
224	0, // FIXME chmod
225	&stderr_xp,
226	&stderr_id );
227
228	assert( (error == 0) , "cannot open stderr pseudo file" );
229	assert( (stderr_id == 2) , "stderr index must be 2" );
230
231	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
232	cycle = (uint32_t)hal_get_cycles();
233	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
234	printk("\n[%s] thread[%x,%x] / stderr open for process %x / cycle %d\n",
235	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
236	#endif
237
238	}
239	else // normal user process
240	{
241	// get extended pointer on stdin pseudo file in parent process
242	file_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy , &parent_ptr->fd_array.array[0] ) );
243
244	// get extended pointer on parent process TXT chdev
245	chdev_xp = chdev_from_file( file_xp );
246
247	// get cluster and local pointer on chdev
248	chdev_cxy = GET_CXY( chdev_xp );
249	chdev_ptr = GET_PTR( chdev_xp );
250
251	// get parent process TXT terminal index
252	txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
253
254	// attach child process to parent process TXT terminal
255	process_txt_attach( process , txt_id );
256
257	// copy all open files from parent process fd_array to this process
258	process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ),
259	XPTR( parent_cxy , &parent_ptr->fd_array ) );
260	}
261
262	// initialize lock protecting CWD changes
263	remote_busylock_init( XPTR( local_cxy , &process->cwd_lock ), LOCK_PROCESS_CWD );
264
265	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
266	cycle = (uint32_t)hal_get_cycles();
267	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
268	printk("\n[%s] thread[%x,%x] / set fd_array for process %x / cycle %d\n",
269	__FUNCTION__, parent_pid, this->trdid, pid , cycle );
270	#endif
271
272	// reset children list root
273	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
274	process->children_nr = 0;
275	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ), LOCK_PROCESS_CHILDREN );
276
277	// reset semaphore / mutex / barrier / condvar list roots and lock
278	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
279	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
280	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
281	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
282	remote_queuelock_init( XPTR( local_cxy , &process->sync_lock ), LOCK_PROCESS_USERSYNC );
283
284	// reset open directories root and lock
285	xlist_root_init( XPTR( local_cxy , &process->dir_root ) );
286	remote_queuelock_init( XPTR( local_cxy , &process->dir_lock ), LOCK_PROCESS_DIR );
287
288	// register new process in the local cluster manager pref_tbl[]
289	lpid_t lpid = LPID_FROM_PID( pid );
290	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
291
292	// register new process descriptor in local cluster manager local_list
293	cluster_process_local_link( process );
294
295	// register new process descriptor in local cluster manager copies_list
296	cluster_process_copies_link( process );
297
298	// initialize th_tbl[] array and associated threads
299	uint32_t i;
300
301	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
302	{
303	process->th_tbl[i] = NULL;
304	}
305	process->th_nr = 0;
306	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
307
308	hal_fence();
309
310	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
311	cycle = (uint32_t)hal_get_cycles();
312	if( DEBUG_PROCESS_REFERENCE_INIT < cycle )
313	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
314	__FUNCTION__, parent_pid, this->trdid, pid, cycle );
315	#endif
316
317	} // process_reference_init()
318
319	/////////////////////////////////////////////////////
320	error_t process_copy_init( process_t * local_process,
321	xptr_t reference_process_xp )
322	{
323	error_t error;
324
325	// get reference process cluster and local pointer
326	cxy_t ref_cxy = GET_CXY( reference_process_xp );
327	process_t * ref_ptr = GET_PTR( reference_process_xp );
328
329	// initialize PID, REF_XP, PARENT_XP, and STATE
330	local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) );
331	local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
332	local_process->ref_xp = reference_process_xp;
333	local_process->owner_xp = reference_process_xp;
334	local_process->term_state = 0;
335
336	#if DEBUG_PROCESS_COPY_INIT
337	thread_t * this = CURRENT_THREAD;
338	uint32_t cycle = (uint32_t)hal_get_cycles();
339	if( DEBUG_PROCESS_COPY_INIT < cycle )
340	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
341	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
342	#endif
343
344	// check user process
345	assert( (local_process->pid != 0), "PID cannot be 0" );
346
347	// reset local process vmm
348	error = vmm_init( local_process );
349	assert( (error == 0) , "cannot initialize VMM\n");
350
351	// reset process file descriptors array
352	process_fd_init( local_process );
353
354	// reset vfs_root_xp / vfs_bin_xp / cwd_xp fields
355	local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
356	local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
357	local_process->cwd_xp = XPTR_NULL;
358
359	// reset children list root (not used in a process descriptor copy)
360	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
361	local_process->children_nr = 0;
362	remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ),
363	LOCK_PROCESS_CHILDREN );
364
365	// reset children_list (not used in a process descriptor copy)
366	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
367
368	// reset semaphores list root (not used in a process descriptor copy)
369	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
370	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
371	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
372	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
373
374	// initialize th_tbl[] array and associated fields
375	uint32_t i;
376	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
377	{
378	local_process->th_tbl[i] = NULL;
379	}
380	local_process->th_nr = 0;
381	rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL );
382
383
384	// register new process descriptor in local cluster manager local_list
385	cluster_process_local_link( local_process );
386
387	// register new process descriptor in owner cluster manager copies_list
388	cluster_process_copies_link( local_process );
389
390	hal_fence();
391
392	#if DEBUG_PROCESS_COPY_INIT
393	cycle = (uint32_t)hal_get_cycles();
394	if( DEBUG_PROCESS_COPY_INIT < cycle )
395	printk("\n[%s] thread[%x,%x] exit for process %x / cycle %d\n",
396	__FUNCTION__, this->process->pid, this->trdid, local_process->pid, cycle );
397	#endif
398
399	return 0;
400
401	} // end process_copy_init()
402
403	///////////////////////////////////////////
404	void process_destroy( process_t * process )
405	{
406	xptr_t parent_xp;
407	process_t * parent_ptr;
408	cxy_t parent_cxy;
409	xptr_t children_lock_xp;
410	xptr_t children_nr_xp;
411
412	pid_t pid = process->pid;
413
414	// check no more threads
415	assert( (process->th_nr == 0),
416	"process %x in cluster %x contains threads", pid , local_cxy );
417
418	#if DEBUG_PROCESS_DESTROY
419	thread_t * this = CURRENT_THREAD;
420	uint32_t cycle = (uint32_t)hal_get_cycles();
421	if( DEBUG_PROCESS_DESTROY < cycle )
422	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
423	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
424	#endif
425
426	// Destroy VMM
427	vmm_destroy( process );
428
429	#if (DEBUG_PROCESS_DESTROY & 1)
430	if( DEBUG_PROCESS_DESTROY < cycle )
431	printk("\n[%s] thread[%x,%x] destroyed VMM for process %x in cluster %x\n",
432	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
433	#endif
434
435	// remove process from local_list in local cluster manager
436	cluster_process_local_unlink( process );
437
438	#if (DEBUG_PROCESS_DESTROY & 1)
439	if( DEBUG_PROCESS_DESTROY < cycle )
440	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from local list\n",
441	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
442	#endif
443
444	// remove process from copies_list in owner cluster manager
445	cluster_process_copies_unlink( process );
446
447	#if (DEBUG_PROCESS_DESTROY & 1)
448	if( DEBUG_PROCESS_DESTROY < cycle )
449	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from copies list\n",
450	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
451	#endif
452
453	// remove process from children_list
454	// and release PID if owner cluster
455	if( CXY_FROM_PID( pid ) == local_cxy )
456	{
457	// get pointers on parent process
458	parent_xp = process->parent_xp;
459	parent_cxy = GET_CXY( parent_xp );
460	parent_ptr = GET_PTR( parent_xp );
461
462	// get extended pointer on children_lock in parent process
463	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
464	children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
465
466	// remove process from children_list
467	remote_queuelock_acquire( children_lock_xp );
468	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
469	hal_remote_atomic_add( children_nr_xp , -1 );
470	remote_queuelock_release( children_lock_xp );
471
472	#if (DEBUG_PROCESS_DESTROY & 1)
473	if( DEBUG_PROCESS_DESTROY < cycle )
474	printk("\n[%s] thread[%x,%x] removed process %x in cluster %x from children list\n",
475	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
476	#endif
477
478	// release the process PID to cluster manager
479	cluster_pid_release( pid );
480
481	#if (DEBUG_PROCESS_DESTROY & 1)
482	if( DEBUG_PROCESS_DESTROY < cycle )
483	printk("\n[%s] thread[%x,%x] released process PID %x to pmgr in cluster %x\n",
484	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy );
485	#endif
486
487	}
488
489	// FIXME decrement the refcount on file pointer for vfs_bin_xp [AG]
490
491	// FIXME close all open files [AG]
492
493	// FIXME synchronize dirty files [AG]
494
495	// release memory allocated to process descriptor
496	process_free( process );
497
498	#if DEBUG_PROCESS_DESTROY
499	cycle = (uint32_t)hal_get_cycles();
500	if( DEBUG_PROCESS_DESTROY < cycle )
501	printk("\n[%s] thread[%x,%x] exit / process %x in cluster %x / cycle %d\n",
502	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
503	#endif
504
505	} // end process_destroy()
506
507	///////////////////////////////////////////////////////////////////
508	const char * process_action_str( process_sigactions_t action_type )
509	{
510	switch ( action_type )
511	{
512	case BLOCK_ALL_THREADS: return "BLOCK";
513	case UNBLOCK_ALL_THREADS: return "UNBLOCK";
514	case DELETE_ALL_THREADS: return "DELETE";
515	default: return "undefined";
516	}
517	}
518
519	////////////////////////////////////////
520	void process_sigaction( pid_t pid,
521	uint32_t type )
522	{
523	cxy_t owner_cxy; // owner cluster identifier
524	lpid_t lpid; // process index in owner cluster
525	cluster_t * cluster; // pointer on cluster manager
526	xptr_t root_xp; // extended pointer on root of copies
527	xptr_t lock_xp; // extended pointer on lock protecting copies
528	xptr_t iter_xp; // iterator on copies list
529	xptr_t process_xp; // extended pointer on process copy
530	cxy_t process_cxy; // process copy cluster identifier
531	process_t * process_ptr; // local pointer on process copy
532	reg_t save_sr; // for critical section
533	thread_t * client; // pointer on client thread
534	xptr_t client_xp; // extended pointer on client thread
535	process_t * local; // pointer on process copy in local cluster
536	uint32_t remote_nr; // number of remote process copies
537	rpc_desc_t rpc; // shared RPC descriptor
538	uint32_t responses; // shared RPC responses counter
539
540	client = CURRENT_THREAD;
541	client_xp = XPTR( local_cxy , client );
542	local = NULL;
543	remote_nr = 0;
544
545	// check calling thread can yield
546	thread_assert_can_yield( client , __FUNCTION__ );
547
548	#if DEBUG_PROCESS_SIGACTION
549	uint32_t cycle = (uint32_t)hal_get_cycles();
550	if( DEBUG_PROCESS_SIGACTION < cycle )
551	printk("\n[%s] thread[%x,%x] enter to %s process %x / cycle %d\n",
552	__FUNCTION__ , client->process->pid, client->trdid,
553	process_action_str( type ) , pid , cycle );
554	#endif
555
556	// get pointer on local cluster manager
557	cluster = LOCAL_CLUSTER;
558
559	// get owner cluster identifier and process lpid
560	owner_cxy = CXY_FROM_PID( pid );
561	lpid = LPID_FROM_PID( pid );
562
563	// get root of list of copies and lock from owner cluster
564	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
565	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
566
567	// check action type
568	assert( ((type == DELETE_ALL_THREADS ) \|\|
569	(type == BLOCK_ALL_THREADS ) \|\|
570	(type == UNBLOCK_ALL_THREADS )), "illegal action type" );
571
572	// This client thread send parallel RPCs to all remote clusters containing
573	// target process copies, wait all responses, and then handles directly
574	// the threads in local cluster, when required.
575	// The client thread allocates a - shared - RPC descriptor in the stack,
576	// because all parallel, non-blocking, server threads use the same input
577	// arguments, and use the shared RPC response field
578
579	// mask IRQs
580	hal_disable_irq( &save_sr);
581
582	// client thread blocks itself
583	thread_block( client_xp , THREAD_BLOCKED_RPC );
584
585	// initialize RPC responses counter
586	responses = 0;
587
588	// initialize shared RPC descriptor
589	// can be shared, because no out arguments
590	rpc.rsp = &responses;
591	rpc.blocking = false;
592	rpc.index = RPC_PROCESS_SIGACTION;
593	rpc.thread = client;
594	rpc.lid = client->core->lid;
595	rpc.args[0] = pid;
596	rpc.args[1] = type;
597
598	// take the lock protecting process copies
599	remote_queuelock_acquire( lock_xp );
600
601	// scan list of process copies
602	XLIST_FOREACH( root_xp , iter_xp )
603	{
604	// get extended pointers and cluster on process
605	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
606	process_cxy = GET_CXY( process_xp );
607	process_ptr = GET_PTR( process_xp );
608
609	if( process_cxy == local_cxy ) // process copy is local
610	{
611	local = process_ptr;
612	}
613	else // process copy is remote
614	{
615	// update number of remote process copies
616	remote_nr++;
617
618	// atomically increment RPC responses counter
619	hal_atomic_add( &responses , 1 );
620
621	#if DEBUG_PROCESS_SIGACTION
622	if( DEBUG_PROCESS_SIGACTION < cycle )
623	printk("\n[%s] thread[%x,%x] send RPC to cluster %x for process %x\n",
624	__FUNCTION__, client->process->pid, client->trdid, process_cxy, pid );
625	#endif
626	// call RPC in target cluster
627	rpc_send( process_cxy , &rpc );
628	}
629	} // end list of copies
630
631	// release the lock protecting process copies
632	remote_queuelock_release( lock_xp );
633
634	// restore IRQs
635	hal_restore_irq( save_sr);
636
637	// - if there is remote process copies, the client thread deschedules,
638	// (it will be unblocked by the last RPC server thread).
639	// - if there is no remote copies, the client thread unblock itself.
640	if( remote_nr )
641	{
642	sched_yield("blocked on rpc_process_sigaction");
643	}
644	else
645	{
646	thread_unblock( client_xp , THREAD_BLOCKED_RPC );
647	}
648
649	// handle the local process copy if required
650	if( local != NULL )
651	{
652
653	#if DEBUG_PROCESS_SIGACTION
654	if( DEBUG_PROCESS_SIGACTION < cycle )
655	printk("\n[%s] thread[%x,%x] handles local process %x in cluster %x\n",
656	__FUNCTION__, client->process->pid, client->trdid, pid , local_cxy );
657	#endif
658	if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp );
659	else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local );
660	else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local );
661	}
662
663	#if DEBUG_PROCESS_SIGACTION
664	cycle = (uint32_t)hal_get_cycles();
665	if( DEBUG_PROCESS_SIGACTION < cycle )
666	printk("\n[%s] thread[%x,%x] exit after %s process %x / cycle %d\n",
667	__FUNCTION__, client->process->pid, client->trdid,
668	process_action_str( type ), pid, cycle );
669	#endif
670
671	} // end process_sigaction()
672
673	/////////////////////////////////////////////////
674	void process_block_threads( process_t * process )
675	{
676	thread_t * target; // pointer on target thread
677	thread_t * this; // pointer on calling thread
678	uint32_t ltid; // index in process th_tbl[]
679	cxy_t owner_cxy; // target process owner cluster
680	uint32_t count; // requests counter
681	volatile uint32_t ack_count; // acknowledges counter
682
683	// get calling thread pointer
684	this = CURRENT_THREAD;
685
686	#if DEBUG_PROCESS_SIGACTION
687	pid_t pid = process->pid;
688	uint32_t cycle = (uint32_t)hal_get_cycles();
689	if( DEBUG_PROCESS_SIGACTION < cycle )
690	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
691	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
692	#endif
693
694	// check target process is an user process
695	assert( (LPID_FROM_PID( process->pid ) != 0 ),
696	"process %x is not an user process\n", process->pid );
697
698	// get target process owner cluster
699	owner_cxy = CXY_FROM_PID( process->pid );
700
701	// get lock protecting process th_tbl[]
702	rwlock_rd_acquire( &process->th_lock );
703
704	// loop on target process local threads
705	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
706	// - if the calling thread and the target thread are not running on the same
707	// core, we ask the target scheduler to acknowlege the blocking
708	// to be sure that the target thread is not running.
709	// - if the calling thread and the target thread are running on the same core,
710	// we don't need confirmation from scheduler.
711
712	for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ )
713	{
714	target = process->th_tbl[ltid];
715
716	if( target != NULL ) // thread exist
717	{
718	count++;
719
720	// set the global blocked bit in target thread descriptor.
721	thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
722
723	if( this->core->lid != target->core->lid )
724	{
725	// increment responses counter
726	hal_atomic_add( (void*)&ack_count , 1 );
727
728	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
729	thread_set_req_ack( target , (uint32_t *)&ack_count );
730
731	// force scheduling on target thread
732	dev_pic_send_ipi( local_cxy , target->core->lid );
733	}
734	}
735	}
736
737	// release lock protecting process th_tbl[]
738	rwlock_rd_release( &process->th_lock );
739
740	// wait other threads acknowledges TODO this could be improved...
741	while( 1 )
742	{
743	// exit when all scheduler acknowledges received
744	if ( ack_count == 0 ) break;
745
746	// wait 1000 cycles before retry
747	hal_fixed_delay( 1000 );
748	}
749
750	#if DEBUG_PROCESS_SIGACTION
751	cycle = (uint32_t)hal_get_cycles();
752	if( DEBUG_PROCESS_SIGACTION < cycle )
753	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
754	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
755	#endif
756
757	} // end process_block_threads()
758
759	/////////////////////////////////////////////////
760	void process_delete_threads( process_t * process,
761	xptr_t client_xp )
762	{
763	thread_t * this; // pointer on calling thread
764	thread_t * target; // local pointer on target thread
765	xptr_t target_xp; // extended pointer on target thread
766	cxy_t owner_cxy; // owner process cluster
767	uint32_t ltid; // index in process th_tbl
768	uint32_t count; // threads counter
769
770	// get calling thread pointer
771	this = CURRENT_THREAD;
772
773	// get target process owner cluster
774	owner_cxy = CXY_FROM_PID( process->pid );
775
776	#if DEBUG_PROCESS_SIGACTION
777	uint32_t cycle = (uint32_t)hal_get_cycles();
778	if( DEBUG_PROCESS_SIGACTION < cycle )
779	printk("\n[%s] thread[%x,%x] enter in cluster %x for process %x / cycle %d\n",
780	__FUNCTION__, this->process->pid, this->trdid, local_cxy, process->pid, cycle );
781	#endif
782
783	// check target process is an user process
784	assert( (LPID_FROM_PID( process->pid ) != 0),
785	"process %x is not an user process\n", process->pid );
786
787	// get lock protecting process th_tbl[]
788	rwlock_wr_acquire( &process->th_lock );
789
790	// loop on target process local threads
791	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
792	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
793	{
794	target = process->th_tbl[ltid];
795
796	if( target != NULL ) // valid thread
797	{
798	count++;
799	target_xp = XPTR( local_cxy , target );
800
801	// main thread and client thread should not be deleted
802	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
803	(client_xp) != target_xp ) // not client thread
804	{
805	// mark target thread for delete and block it
806	thread_delete( target_xp , process->pid , false ); // not forced
807	}
808	}
809	}
810
811	// release lock protecting process th_tbl[]
812	rwlock_wr_release( &process->th_lock );
813
814	#if DEBUG_PROCESS_SIGACTION
815	cycle = (uint32_t)hal_get_cycles();
816	if( DEBUG_PROCESS_SIGACTION < cycle )
817	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
818	__FUNCTION__, this->process->pid, this->trdid, process->pid, local_cxy , cycle );
819	#endif
820
821	} // end process_delete_threads()
822
823	///////////////////////////////////////////////////
824	void process_unblock_threads( process_t * process )
825	{
826	thread_t * target; // pointer on target thead
827	thread_t * this; // pointer on calling thread
828	uint32_t ltid; // index in process th_tbl
829	uint32_t count; // requests counter
830
831	// get calling thread pointer
832	this = CURRENT_THREAD;
833
834	#if DEBUG_PROCESS_SIGACTION
835	pid_t pid = process->pid;
836	uint32_t cycle = (uint32_t)hal_get_cycles();
837	if( DEBUG_PROCESS_SIGACTION < cycle )
838	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
839	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy , cycle );
840	#endif
841
842	// check target process is an user process
843	assert( ( LPID_FROM_PID( process->pid ) != 0 ),
844	"process %x is not an user process\n", process->pid );
845
846	// get lock protecting process th_tbl[]
847	rwlock_rd_acquire( &process->th_lock );
848
849	// loop on process threads to unblock all threads
850	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
851	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
852	{
853	target = process->th_tbl[ltid];
854
855	if( target != NULL ) // thread found
856	{
857	count++;
858
859	// reset the global blocked bit in target thread descriptor.
860	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
861	}
862	}
863
864	// release lock protecting process th_tbl[]
865	rwlock_rd_release( &process->th_lock );
866
867	#if DEBUG_PROCESS_SIGACTION
868	cycle = (uint32_t)hal_get_cycles();
869	if( DEBUG_PROCESS_SIGACTION < cycle )
870	printk("\n[%s] thread[%x,%x] exit for process %x in cluster %x / cycle %d\n",
871	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
872	#endif
873
874	} // end process_unblock_threads()
875
876	///////////////////////////////////////////////
877	process_t * process_get_local_copy( pid_t pid )
878	{
879	error_t error;
880	process_t * process_ptr; // local pointer on process
881	xptr_t process_xp; // extended pointer on process
882
883	cluster_t * cluster = LOCAL_CLUSTER;
884
885	#if DEBUG_PROCESS_GET_LOCAL_COPY
886	thread_t * this = CURRENT_THREAD;
887	uint32_t cycle = (uint32_t)hal_get_cycles();
888	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
889	printk("\n[%s] thread[%x,%x] enter for process %x in cluster %x / cycle %d\n",
890	__FUNCTION__, this->process->pid, this->trdid, pid, local_cxy, cycle );
891	#endif
892
893	// get lock protecting local list of processes
894	remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
895
896	// scan the local list of process descriptors to find the process
897	xptr_t iter;
898	bool_t found = false;
899	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
900	{
901	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
902	process_ptr = GET_PTR( process_xp );
903	if( process_ptr->pid == pid )
904	{
905	found = true;
906	break;
907	}
908	}
909
910	// release lock protecting local list of processes
911	remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
912
913	// allocate memory for a new local process descriptor
914	// and initialise it from reference cluster if not found
915	if( !found )
916	{
917	// get extended pointer on reference process descriptor
918	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
919
920	assert( (ref_xp != XPTR_NULL) , "illegal pid\n" );
921
922	// allocate memory for local process descriptor
923	process_ptr = process_alloc();
924
925	if( process_ptr == NULL ) return NULL;
926
927	// initialize local process descriptor copy
928	error = process_copy_init( process_ptr , ref_xp );
929
930	if( error ) return NULL;
931	}
932
933	#if DEBUG_PROCESS_GET_LOCAL_COPY
934	cycle = (uint32_t)hal_get_cycles();
935	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
936	printk("\n[%s] thread[%x,%x] exit in cluster %x / process %x / cycle %d\n",
937	__FUNCTION__, this->process->pid, this->trdid, local_cxy, process_ptr, cycle );
938	#endif
939
940	return process_ptr;
941
942	} // end process_get_local_copy()
943
944	////////////////////////////////////////////
945	pid_t process_get_ppid( xptr_t process_xp )
946	{
947	cxy_t process_cxy;
948	process_t * process_ptr;
949	xptr_t parent_xp;
950	cxy_t parent_cxy;
951	process_t * parent_ptr;
952
953	// get process cluster and local pointer
954	process_cxy = GET_CXY( process_xp );
955	process_ptr = GET_PTR( process_xp );
956
957	// get pointers on parent process
958	parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
959	parent_cxy = GET_CXY( parent_xp );
960	parent_ptr = GET_PTR( parent_xp );
961
962	return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
963	}
964
965	//////////////////////////////////////////////////////////////////////////////////////////
966	// File descriptor array related functions
967	//////////////////////////////////////////////////////////////////////////////////////////
968
969	///////////////////////////////////////////
970	void process_fd_init( process_t * process )
971	{
972	uint32_t fd;
973
974	// initialize lock
975	remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY );
976
977	// initialize number of open files
978	process->fd_array.current = 0;
979
980	// initialize array
981	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
982	{
983	process->fd_array.array[fd] = XPTR_NULL;
984	}
985	}
986	////////////////////////////////////////////////////
987	error_t process_fd_register( xptr_t process_xp,
988	xptr_t file_xp,
989	uint32_t * fdid )
990	{
991	bool_t found;
992	uint32_t id;
993	xptr_t xp;
994
995	// get reference process cluster and local pointer
996	process_t * process_ptr = GET_PTR( process_xp );
997	cxy_t process_cxy = GET_CXY( process_xp );
998
999	// check client process is reference process
1000	assert( (process_xp == hal_remote_l64( XPTR( process_cxy , &process_ptr->ref_xp ) ) ),
1001	"client process must be reference process\n" );
1002
1003	#if DEBUG_PROCESS_FD_REGISTER
1004	thread_t * this = CURRENT_THREAD;
1005	uint32_t cycle = (uint32_t)hal_get_cycles();
1006	pid_t pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid) );
1007	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1008	printk("\n[%s] thread[%x,%x] enter for process %x / cycle %d\n",
1009	__FUNCTION__, this->process->pid, this->trdid, pid, cycle );
1010	#endif
1011
1012	// build extended pointer on lock protecting reference fd_array
1013	xptr_t lock_xp = XPTR( process_cxy , &process_ptr->fd_array.lock );
1014
1015	// take lock protecting reference fd_array
1016	remote_queuelock_acquire( lock_xp );
1017
1018	found = false;
1019
1020	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
1021	{
1022	xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) );
1023	if ( xp == XPTR_NULL )
1024	{
1025	// update reference fd_array
1026	hal_remote_s64( XPTR( process_cxy , &process_ptr->fd_array.array[id] ) , file_xp );
1027	hal_remote_atomic_add( XPTR( process_cxy , &process_ptr->fd_array.current ) , 1 );
1028
1029	// exit
1030	*fdid = id;
1031	found = true;
1032	break;
1033	}
1034	}
1035
1036	// release lock protecting fd_array
1037	remote_queuelock_release( lock_xp );
1038
1039	#if DEBUG_PROCESS_FD_REGISTER
1040	cycle = (uint32_t)hal_get_cycles();
1041	if( DEBUG_PROCESS_FD_REGISTER < cycle )
1042	printk("\n[%s] thread[%x,%x] exit for process %x / fdid %d / cycle %d\n",
1043	__FUNCTION__, this->process->pid, this->trdid, pid, id, cycle );
1044	#endif
1045
1046	if ( !found ) return -1;
1047	else return 0;
1048
1049	} // end process_fd_register()
1050
1051	////////////////////////////////////////////////
1052	xptr_t process_fd_get_xptr( process_t * process,
1053	uint32_t fdid )
1054	{
1055	xptr_t file_xp;
1056	xptr_t lock_xp;
1057
1058	// access local copy of process descriptor
1059	file_xp = process->fd_array.array[fdid];
1060
1061	if( file_xp == XPTR_NULL )
1062	{
1063	// get reference process cluster and local pointer
1064	xptr_t ref_xp = process->ref_xp;
1065	cxy_t ref_cxy = GET_CXY( ref_xp );
1066	process_t * ref_ptr = GET_PTR( ref_xp );
1067
1068	// build extended pointer on lock protecting reference fd_array
1069	lock_xp = XPTR( ref_cxy , &ref_ptr->fd_array.lock );
1070
1071	// take lock protecting reference fd_array
1072	remote_queuelock_acquire( lock_xp );
1073
1074	// access reference process descriptor
1075	file_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) );
1076
1077	// update local fd_array if found
1078	if( file_xp != XPTR_NULL ) process->fd_array.array[fdid] = file_xp;
1079
1080	// release lock protecting reference fd_array
1081	remote_queuelock_release( lock_xp );
1082	}
1083
1084	return file_xp;
1085
1086	} // end process_fd_get_xptr()
1087
1088	///////////////////////////////////////////
1089	void process_fd_remote_copy( xptr_t dst_xp,
1090	xptr_t src_xp )
1091	{
1092	uint32_t fd;
1093	xptr_t entry;
1094
1095	// get cluster and local pointer for src fd_array
1096	cxy_t src_cxy = GET_CXY( src_xp );
1097	fd_array_t * src_ptr = GET_PTR( src_xp );
1098
1099	// get cluster and local pointer for dst fd_array
1100	cxy_t dst_cxy = GET_CXY( dst_xp );
1101	fd_array_t * dst_ptr = GET_PTR( dst_xp );
1102
1103	// get the remote lock protecting the src fd_array
1104	remote_queuelock_acquire( XPTR( src_cxy , &src_ptr->lock ) );
1105
1106	// loop on all fd_array entries
1107	for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
1108	{
1109	entry = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->array[fd] ) );
1110
1111	if( entry != XPTR_NULL )
1112	{
1113	// increment file descriptor refcount
1114	vfs_file_count_up( entry );
1115
1116	// copy entry in destination process fd_array
1117	hal_remote_s64( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry );
1118	}
1119	}
1120
1121	// release lock on source process fd_array
1122	remote_queuelock_release( XPTR( src_cxy , &src_ptr->lock ) );
1123
1124	} // end process_fd_remote_copy()
1125
1126
1127	////////////////////////////////////
1128	bool_t process_fd_array_full( void )
1129	{
1130	// get extended pointer on reference process
1131	xptr_t ref_xp = CURRENT_THREAD->process->ref_xp;
1132
1133	// get reference process cluster and local pointer
1134	process_t * ref_ptr = GET_PTR( ref_xp );
1135	cxy_t ref_cxy = GET_CXY( ref_xp );
1136
1137	// get number of open file descriptors from reference fd_array
1138	uint32_t current = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) );
1139
1140	return ( current >= CONFIG_PROCESS_FILE_MAX_NR );
1141	}
1142
1143
1144	////////////////////////////////////////////////////////////////////////////////////
1145	// Thread related functions
1146	////////////////////////////////////////////////////////////////////////////////////
1147
1148	/////////////////////////////////////////////////////
1149	error_t process_register_thread( process_t * process,
1150	thread_t * thread,
1151	trdid_t * trdid )
1152	{
1153	ltid_t ltid;
1154	bool_t found = false;
1155
1156	// check arguments
1157	assert( (process != NULL) , "process argument is NULL" );
1158	assert( (thread != NULL) , "thread argument is NULL" );
1159
1160	// get the lock protecting th_tbl for all threads
1161	// but the idle thread executing kernel_init (cannot yield)
1162	if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock );
1163
1164	// scan th_tbl
1165	for( ltid = 0 ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ )
1166	{
1167	if( process->th_tbl[ltid] == NULL )
1168	{
1169	found = true;
1170	break;
1171	}
1172	}
1173
1174	if( found )
1175	{
1176	// register thread in th_tbl[]
1177	process->th_tbl[ltid] = thread;
1178	process->th_nr++;
1179
1180	// returns trdid
1181	*trdid = TRDID( local_cxy , ltid );
1182	}
1183
1184	// release the lock protecting th_tbl
1185	if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock );
1186
1187	return (found) ? 0 : 0xFFFFFFFF;
1188
1189	} // end process_register_thread()
1190
1191	/////////////////////////////////////////////////
1192	bool_t process_remove_thread( thread_t * thread )
1193	{
1194	uint32_t count; // number of threads in local process descriptor
1195
1196	process_t * process = thread->process;
1197
1198	// get thread local index
1199	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
1200
1201	// get the lock protecting th_tbl[]
1202	rwlock_wr_acquire( &process->th_lock );
1203
1204	// get number of threads
1205	count = process->th_nr;
1206
1207	// check thread
1208	assert( (thread != NULL) , "thread argument is NULL" );
1209
1210	// check th_nr value
1211	assert( (count > 0) , "process th_nr cannot be 0\n" );
1212
1213	// remove thread from th_tbl[]
1214	process->th_tbl[ltid] = NULL;
1215	process->th_nr = count-1;
1216
1217	// release lock protecting th_tbl
1218	rwlock_wr_release( &process->th_lock );
1219
1220	return (count == 1);
1221
1222	} // end process_remove_thread()
1223
1224	/////////////////////////////////////////////////////////
1225	error_t process_make_fork( xptr_t parent_process_xp,
1226	xptr_t parent_thread_xp,
1227	pid_t * child_pid,
1228	thread_t ** child_thread )
1229	{
1230	process_t * process; // local pointer on child process descriptor
1231	thread_t * thread; // local pointer on child thread descriptor
1232	pid_t new_pid; // process identifier for child process
1233	pid_t parent_pid; // process identifier for parent process
1234	xptr_t ref_xp; // extended pointer on reference process
1235	xptr_t vfs_bin_xp; // extended pointer on .elf file
1236	error_t error;
1237
1238	// get cluster and local pointer for parent process
1239	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
1240	process_t * parent_process_ptr = GET_PTR( parent_process_xp );
1241
1242	// get parent process PID and extended pointer on .elf file
1243	parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid));
1244	vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
1245
1246	// get extended pointer on reference process
1247	ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
1248
1249	// check parent process is the reference process
1250	assert( (parent_process_xp == ref_xp ) ,
1251	"parent process must be the reference process\n" );
1252
1253	#if DEBUG_PROCESS_MAKE_FORK
1254	uint32_t cycle = (uint32_t)hal_get_cycles();
1255	thread_t * this = CURRENT_THREAD;
1256	trdid_t trdid = this->trdid;
1257	pid_t pid = this->process->pid;
1258	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1259	printk("\n[%s] thread[%x,%x] enter / cluster %x / cycle %d\n",
1260	__FUNCTION__, pid, trdid, local_cxy, cycle );
1261	#endif
1262
1263	// allocate a process descriptor
1264	process = process_alloc();
1265	if( process == NULL )
1266	{
1267	printk("\n[ERROR] in %s : cannot get process in cluster %x\n",
1268	__FUNCTION__, local_cxy );
1269	return -1;
1270	}
1271
1272	// allocate a child PID from local cluster
1273	error = cluster_pid_alloc( process , &new_pid );
1274	if( error )
1275	{
1276	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
1277	__FUNCTION__, local_cxy );
1278	process_free( process );
1279	return -1;
1280	}
1281
1282	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1283	cycle = (uint32_t)hal_get_cycles();
1284	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1285	printk("\n[%s] thread[%x,%x] allocated process %x / cycle %d\n",
1286	__FUNCTION__, pid, trdid, new_pid, cycle );
1287	#endif
1288
1289	// initializes child process descriptor from parent process descriptor
1290	process_reference_init( process,
1291	new_pid,
1292	parent_process_xp );
1293
1294	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1295	cycle = (uint32_t)hal_get_cycles();
1296	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1297	printk("\n[%s] thread[%x,%x] initialized child_process %x / cycle %d\n",
1298	__FUNCTION__, pid, trdid, new_pid, cycle );
1299	#endif
1300
1301
1302	// copy VMM from parent descriptor to child descriptor
1303	error = vmm_fork_copy( process,
1304	parent_process_xp );
1305	if( error )
1306	{
1307	printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n",
1308	__FUNCTION__, local_cxy );
1309	process_free( process );
1310	cluster_pid_release( new_pid );
1311	return -1;
1312	}
1313
1314	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1315	cycle = (uint32_t)hal_get_cycles();
1316	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1317	printk("\n[%s] thread[%x,%x] copied VMM from parent to child / cycle %d\n",
1318	__FUNCTION__, pid, trdid, cycle );
1319	#endif
1320
1321	// if parent_process is INIT, or if parent_process is the TXT owner,
1322	// the child_process becomes the owner of its TXT terminal
1323	if( (parent_pid == 1) \|\| process_txt_is_owner( parent_process_xp ) )
1324	{
1325	process_txt_set_ownership( XPTR( local_cxy , process ) );
1326
1327	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1328	cycle = (uint32_t)hal_get_cycles();
1329	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1330	printk("\n[%s] thread[%x,%x] / child takes TXT ownership / cycle %d\n",
1331	__FUNCTION__ , pid, trdid, cycle );
1332	#endif
1333
1334	}
1335
1336	// update extended pointer on .elf file
1337	process->vfs_bin_xp = vfs_bin_xp;
1338
1339	// create child thread descriptor from parent thread descriptor
1340	error = thread_user_fork( parent_thread_xp,
1341	process,
1342	&thread );
1343	if( error )
1344	{
1345	printk("\n[ERROR] in %s : cannot create thread in cluster %x\n",
1346	__FUNCTION__, local_cxy );
1347	process_free( process );
1348	cluster_pid_release( new_pid );
1349	return -1;
1350	}
1351
1352	// check main thread LTID
1353	assert( (LTID_FROM_TRDID(thread->trdid) == 0) ,
1354	"main thread must have LTID == 0\n" );
1355
1356	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1357	cycle = (uint32_t)hal_get_cycles();
1358	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1359	printk("\n[%s] thread[%x,%x] created main thread %x / cycle %d\n",
1360	__FUNCTION__, pid, trdid, thread, cycle );
1361	#endif
1362
1363	// set Copy_On_Write flag in parent process GPT
1364	// this includes all replicated GPT copies
1365	if( parent_process_cxy == local_cxy ) // reference is local
1366	{
1367	vmm_set_cow( parent_process_ptr );
1368	}
1369	else // reference is remote
1370	{
1371	rpc_vmm_set_cow_client( parent_process_cxy,
1372	parent_process_ptr );
1373	}
1374
1375	// set Copy_On_Write flag in child process GPT
1376	vmm_set_cow( process );
1377
1378	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
1379	cycle = (uint32_t)hal_get_cycles();
1380	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1381	printk("\n[%s] thread[%x,%x] set COW in parent and child / cycle %d\n",
1382	__FUNCTION__, pid, trdid, cycle );
1383	#endif
1384
1385	// get extended pointers on parent children_root, children_lock and children_nr
1386	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
1387	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
1388	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
1389
1390	// register process in parent children list
1391	remote_queuelock_acquire( children_lock_xp );
1392	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1393	hal_remote_atomic_add( children_nr_xp , 1 );
1394	remote_queuelock_release( children_lock_xp );
1395
1396	// return success
1397	*child_thread = thread;
1398	*child_pid = new_pid;
1399
1400	#if DEBUG_PROCESS_MAKE_FORK
1401	cycle = (uint32_t)hal_get_cycles();
1402	if( DEBUG_PROCESS_MAKE_FORK < cycle )
1403	printk("\n[%s] thread[%x,%x] exit / created process %x / cycle %d\n",
1404	__FUNCTION__, pid, trdid, new_pid, cycle );
1405	#endif
1406
1407	return 0;
1408
1409	} // end process_make_fork()
1410
1411	/////////////////////////////////////////////////////
1412	error_t process_make_exec( exec_info_t * exec_info )
1413	{
1414	thread_t * thread; // local pointer on this thread
1415	process_t * process; // local pointer on this process
1416	pid_t pid; // this process identifier
1417	xptr_t ref_xp; // reference process for this process
1418	error_t error; // value returned by called functions
1419	char * path; // path to .elf file
1420	xptr_t file_xp; // extended pointer on .elf file descriptor
1421	uint32_t file_id; // file index in fd_array
1422	uint32_t args_nr; // number of main thread arguments
1423	char ** args_pointers; // array of pointers on main thread arguments
1424
1425	// get thread, process, pid and ref_xp
1426	thread = CURRENT_THREAD;
1427	process = thread->process;
1428	pid = process->pid;
1429	ref_xp = process->ref_xp;
1430
1431	// get relevant infos from exec_info
1432	path = exec_info->path;
1433	args_nr = exec_info->args_nr;
1434	args_pointers = exec_info->args_pointers;
1435
1436	#if DEBUG_PROCESS_MAKE_EXEC
1437	uint32_t cycle = (uint32_t)hal_get_cycles();
1438	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1439	printk("\n[%s] thread[%x,%x] enters for %s / cycle %d\n",
1440	__FUNCTION__, pid, thread->trdid, path, cycle );
1441	#endif
1442
1443	// open the file identified by <path>
1444	file_xp = XPTR_NULL;
1445	file_id = 0xFFFFFFFF;
1446	error = vfs_open( process->vfs_root_xp,
1447	path,
1448	ref_xp,
1449	O_RDONLY,
1450	0,
1451	&file_xp,
1452	&file_id );
1453	if( error )
1454	{
1455	printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path );
1456	return -1;
1457	}
1458
1459	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1460	cycle = (uint32_t)hal_get_cycles();
1461	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1462	printk("\n[%s] thread[%x,%x] opened file <%s> / cycle %d\n",
1463	__FUNCTION__, pid, thread->trdid, path, cycle );
1464	#endif
1465
1466	// delete all threads other than this main thread in all clusters
1467	process_sigaction( pid , DELETE_ALL_THREADS );
1468
1469	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
1470	cycle = (uint32_t)hal_get_cycles();
1471	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1472	printk("\n[%s] thread[%x,%x] deleted all threads / cycle %d\n",
1473	__FUNCTION__, pid, thread->trdid, cycle );
1474	#endif
1475
1476	// reset local process VMM
1477	vmm_destroy( process );
1478
1479	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1480	cycle = (uint32_t)hal_get_cycles();
1481	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1482	printk("\n[%s] thread[%x,%x] reset VMM / cycle %d\n",
1483	__FUNCTION__, pid, thread->trdid, cycle );
1484	#endif
1485
1486	// re-initialize the VMM (kentry/args/envs vsegs registration)
1487	error = vmm_init( process );
1488	if( error )
1489	{
1490	printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path );
1491	vfs_close( file_xp , file_id );
1492	// FIXME restore old process VMM [AG]
1493	return -1;
1494	}
1495
1496	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1497	cycle = (uint32_t)hal_get_cycles();
1498	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1499	printk("\n[%s] thread[%x,%x] / kentry/args/envs vsegs registered / cycle %d\n",
1500	__FUNCTION__, pid, thread->trdid, cycle );
1501	#endif
1502
1503	// register code & data vsegs as well as entry-point in process VMM,
1504	// and register extended pointer on .elf file in process descriptor
1505	error = elf_load_process( file_xp , process );
1506	if( error )
1507	{
1508	printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path );
1509	vfs_close( file_xp , file_id );
1510	// FIXME restore old process VMM [AG]
1511	return -1;
1512	}
1513
1514	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
1515	cycle = (uint32_t)hal_get_cycles();
1516	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
1517	printk("\n[%s] thread[%x,%x] / code/data vsegs registered / cycle %d\n",
1518	__FUNCTION__, pid, thread->trdid, cycle );
1519	#endif
1520
1521	// update the existing main thread descriptor... and jump to user code
1522	error = thread_user_exec( (void *)process->vmm.entry_point,
1523	args_nr,
1524	args_pointers );
1525	if( error )
1526	{
1527	printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path );
1528	vfs_close( file_xp , file_id );
1529	// FIXME restore old process VMM
1530	return -1;
1531	}
1532
1533	assert( false, "we should not execute this code");
1534
1535	return 0;
1536
1537	} // end process_make_exec()
1538
1539
1540	////////////////////////////////////////////////
1541	void process_zero_create( process_t * process,
1542	boot_info_t * info )
1543	{
1544	error_t error;
1545	pid_t pid;
1546
1547	#if DEBUG_PROCESS_ZERO_CREATE
1548	uint32_t cycle = (uint32_t)hal_get_cycles();
1549	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1550	printk("\n[%s] enter / cluster %x / cycle %d\n",
1551	__FUNCTION__, local_cxy, cycle );
1552	#endif
1553
1554	// get PID from local cluster manager for this kernel process
1555	error = cluster_pid_alloc( process , &pid );
1556
1557	if( error \|\| (LPID_FROM_PID( pid ) != 0) )
1558	{
1559	printk("\n[PANIC] in %s : cannot get valid PID in cluster %x / PID = %x\n",
1560	__FUNCTION__ , local_cxy, pid );
1561	hal_core_sleep();
1562	}
1563
1564	// initialize PID, REF_XP, PARENT_XP, and STATE
1565	// the kernel process_zero is its own parent_process,
1566	// reference_process, and owner_process, and cannot be killed...
1567	process->pid = pid;
1568	process->ref_xp = XPTR( local_cxy , process );
1569	process->owner_xp = XPTR( local_cxy , process );
1570	process->parent_xp = XPTR( local_cxy , process );
1571	process->term_state = 0;
1572
1573	// initialise kernel GPT and VSL, depending on architecture
1574	hal_vmm_kernel_init( info );
1575
1576	// reset th_tbl[] array and associated fields
1577	uint32_t i;
1578	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
1579	{
1580	process->th_tbl[i] = NULL;
1581	}
1582	process->th_nr = 0;
1583	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
1584
1585
1586	// reset children list as empty
1587	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
1588	process->children_nr = 0;
1589	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ),
1590	LOCK_PROCESS_CHILDREN );
1591
1592	// register kernel process in cluster manager local_list
1593	cluster_process_local_link( process );
1594
1595	hal_fence();
1596
1597	#if DEBUG_PROCESS_ZERO_CREATE
1598	cycle = (uint32_t)hal_get_cycles();
1599	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
1600	printk("\n[%s] exit / cluster %x / cycle %d\n",
1601	__FUNCTION__, local_cxy, cycle );
1602	#endif
1603
1604	} // end process_zero_create()
1605
1606	////////////////////////////////
1607	void process_init_create( void )
1608	{
1609	process_t * process; // local pointer on process descriptor
1610	pid_t pid; // process_init identifier
1611	thread_t * thread; // local pointer on main thread
1612	pthread_attr_t attr; // main thread attributes
1613	lid_t lid; // selected core local index for main thread
1614	xptr_t file_xp; // extended pointer on .elf file descriptor
1615	uint32_t file_id; // file index in fd_array
1616	error_t error;
1617
1618	#if DEBUG_PROCESS_INIT_CREATE
1619	thread_t * this = CURRENT_THREAD;
1620	uint32_t cycle = (uint32_t)hal_get_cycles();
1621	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1622	printk("\n[%s] thread[%x,%x] enter / cycle %d\n",
1623	__FUNCTION__, this->process->pid, this->trdid, cycle );
1624	#endif
1625
1626	// allocates memory for process descriptor from local cluster
1627	process = process_alloc();
1628
1629	// check memory allocator
1630	assert( (process != NULL),
1631	"no memory for process descriptor in cluster %x\n", local_cxy );
1632
1633	// set the CWD and VFS_ROOT fields in process descriptor
1634	process->cwd_xp = process_zero.vfs_root_xp;
1635	process->vfs_root_xp = process_zero.vfs_root_xp;
1636
1637	// get PID from local cluster
1638	error = cluster_pid_alloc( process , &pid );
1639
1640	// check PID allocator
1641	assert( (error == 0),
1642	"cannot allocate PID in cluster %x\n", local_cxy );
1643
1644	// check PID value
1645	assert( (pid == 1) ,
1646	"process INIT must be first process in cluster 0\n" );
1647
1648	// initialize process descriptor / parent is local process_zero
1649	process_reference_init( process,
1650	pid,
1651	XPTR( local_cxy , &process_zero ) );
1652
1653	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1654	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1655	printk("\n[%s] thread[%x,%x] initialized process descriptor\n",
1656	__FUNCTION__, this->process->pid, this->trdid );
1657	#endif
1658
1659	// open the file identified by CONFIG_PROCESS_INIT_PATH
1660	file_xp = XPTR_NULL;
1661	file_id = -1;
1662	error = vfs_open( process->vfs_root_xp,
1663	CONFIG_PROCESS_INIT_PATH,
1664	XPTR( local_cxy , process ),
1665	O_RDONLY,
1666	0,
1667	&file_xp,
1668	&file_id );
1669
1670	assert( (error == 0),
1671	"failed to open file <%s>\n", CONFIG_PROCESS_INIT_PATH );
1672
1673	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1674	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1675	printk("\n[%s] thread[%x,%x] open .elf file decriptor\n",
1676	__FUNCTION__, this->process->pid, this->trdid );
1677	#endif
1678
1679	// register "code" and "data" vsegs as well as entry-point
1680	// in process VMM, using information contained in the elf file.
1681	error = elf_load_process( file_xp , process );
1682
1683	assert( (error == 0),
1684	"cannot access .elf file <%s>\n", CONFIG_PROCESS_INIT_PATH );
1685
1686	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1687	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1688	printk("\n[%s] thread[%x,%x] registered code/data vsegs in VMM\n",
1689	__FUNCTION__, this->process->pid, this->trdid );
1690	#endif
1691
1692	// get extended pointers on process_zero children_root, children_lock
1693	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
1694	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
1695
1696	// take lock protecting kernel process children list
1697	remote_queuelock_acquire( children_lock_xp );
1698
1699	// register process INIT in parent local process_zero
1700	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
1701	hal_atomic_add( &process_zero.children_nr , 1 );
1702
1703	// release lock protecting kernel process children list
1704	remote_queuelock_release( children_lock_xp );
1705
1706	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1707	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1708	printk("\n[%s] thread[%x,%x] registered init process in parent\n",
1709	__FUNCTION__, this->process->pid, this->trdid );
1710	#endif
1711
1712	// select a core in local cluster to execute the main thread
1713	lid = cluster_select_local_core();
1714
1715	// initialize pthread attributes for main thread
1716	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
1717	attr.cxy = local_cxy;
1718	attr.lid = lid;
1719
1720	// create and initialize thread descriptor
1721	error = thread_user_create( pid,
1722	(void *)process->vmm.entry_point,
1723	NULL,
1724	&attr,
1725	&thread );
1726
1727	assert( (error == 0),
1728	"cannot create main thread for <%s>\n", CONFIG_PROCESS_INIT_PATH );
1729
1730	assert( (thread->trdid == 0),
1731	"main thread must have index 0 for <%s>\n", CONFIG_PROCESS_INIT_PATH );
1732
1733	#if(DEBUG_PROCESS_INIT_CREATE & 1)
1734	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1735	printk("\n[%s] thread[%x,%x] created main thread\n",
1736	__FUNCTION__, this->process->pid, this->trdid );
1737	#endif
1738
1739	// activate thread
1740	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
1741
1742	hal_fence();
1743
1744	#if DEBUG_PROCESS_INIT_CREATE
1745	cycle = (uint32_t)hal_get_cycles();
1746	if( DEBUG_PROCESS_INIT_CREATE < cycle )
1747	printk("\n[%s] thread[%x,%x] exit / cycle %d\n",
1748	__FUNCTION__, this->process->pid, this->trdid, cycle );
1749	#endif
1750
1751	} // end process_init_create()
1752
1753	/////////////////////////////////////////
1754	void process_display( xptr_t process_xp )
1755	{
1756	process_t * process_ptr;
1757	cxy_t process_cxy;
1758
1759	xptr_t parent_xp; // extended pointer on parent process
1760	process_t * parent_ptr;
1761	cxy_t parent_cxy;
1762
1763	xptr_t owner_xp; // extended pointer on owner process
1764	process_t * owner_ptr;
1765	cxy_t owner_cxy;
1766
1767	pid_t pid;
1768	pid_t ppid;
1769	lpid_t lpid;
1770	uint32_t state;
1771	uint32_t th_nr;
1772
1773	xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor
1774	xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev
1775	chdev_t * txt_chdev_ptr;
1776	cxy_t txt_chdev_cxy;
1777	xptr_t txt_owner_xp; // extended pointer on TXT owner process
1778
1779	xptr_t elf_file_xp; // extended pointer on .elf file
1780	cxy_t elf_file_cxy;
1781	vfs_file_t * elf_file_ptr;
1782	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
1783
1784	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
1785	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
1786
1787	// get cluster and local pointer on process
1788	process_ptr = GET_PTR( process_xp );
1789	process_cxy = GET_CXY( process_xp );
1790
1791	// get process PID, LPID, and state
1792	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
1793	lpid = LPID_FROM_PID( pid );
1794	state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) );
1795
1796	// get process PPID
1797	parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
1798	parent_cxy = GET_CXY( parent_xp );
1799	parent_ptr = GET_PTR( parent_xp );
1800	ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
1801
1802	// get number of threads
1803	th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) );
1804
1805	// get pointers on owner process descriptor
1806	owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) );
1807	owner_cxy = GET_CXY( owner_xp );
1808	owner_ptr = GET_PTR( owner_xp );
1809
1810	// get process TXT name and .elf name
1811	if( lpid ) // user process
1812	{
1813
1814	// get extended pointer on file descriptor associated to TXT_RX
1815	txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) );
1816
1817	assert( (txt_file_xp != XPTR_NULL) ,
1818	"process must be attached to one TXT terminal\n" );
1819
1820	// get TXT_RX chdev pointers
1821	txt_chdev_xp = chdev_from_file( txt_file_xp );
1822	txt_chdev_cxy = GET_CXY( txt_chdev_xp );
1823	txt_chdev_ptr = GET_PTR( txt_chdev_xp );
1824
1825	// get TXT_RX name and ownership
1826	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
1827	XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) );
1828
1829	txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy,
1830	&txt_chdev_ptr->ext.txt.owner_xp ) );
1831
1832	// get process .elf name
1833	elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
1834	elf_file_cxy = GET_CXY( elf_file_xp );
1835	elf_file_ptr = GET_PTR( elf_file_xp );
1836	elf_inode_ptr = hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
1837	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
1838	}
1839	else // kernel process_zero
1840	{
1841	// TXT name and .elf name are not registered in kernel process_zero
1842	strcpy( txt_name , "txt0_rx" );
1843	txt_owner_xp = process_xp;
1844	strcpy( elf_name , "kernel.elf" );
1845	}
1846
1847	// display process info
1848	if( txt_owner_xp == process_xp )
1849	{
1850	nolock_printk("PID %X \| %s (FG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
1851	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
1852	}
1853	else
1854	{
1855	nolock_printk("PID %X \| %s (BG) \| %X \| PPID %X \| TS %X \| %d \| %s\n",
1856	pid, txt_name, process_ptr, ppid, state, th_nr, elf_name );
1857	}
1858	} // end process_display()
1859
1860
1861	////////////////////////////////////////////////////////////////////////////////////////
1862	// Terminals related functions
1863	////////////////////////////////////////////////////////////////////////////////////////
1864
1865	//////////////////////////////////
1866	uint32_t process_txt_alloc( void )
1867	{
1868	uint32_t index; // TXT terminal index
1869	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1870	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1871	cxy_t chdev_cxy; // TXT_RX chdev cluster
1872	xptr_t root_xp; // extended pointer on owner field in chdev
1873
1874	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
1875	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
1876	{
1877	// get pointers on TXT_RX[index]
1878	chdev_xp = chdev_dir.txt_rx[index];
1879	chdev_cxy = GET_CXY( chdev_xp );
1880	chdev_ptr = GET_PTR( chdev_xp );
1881
1882	// get extended pointer on root of attached process
1883	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
1884
1885	// return free TXT index if found
1886	if( xlist_is_empty( root_xp ) ) return index;
1887	}
1888
1889	assert( false , "no free TXT terminal found" );
1890
1891	return -1;
1892
1893	} // end process_txt_alloc()
1894
1895	/////////////////////////////////////////////
1896	void process_txt_attach( process_t * process,
1897	uint32_t txt_id )
1898	{
1899	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1900	cxy_t chdev_cxy; // TXT_RX chdev cluster
1901	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1902	xptr_t root_xp; // extended pointer on list root in chdev
1903	xptr_t lock_xp; // extended pointer on list lock in chdev
1904
1905	// check process is in owner cluster
1906	assert( (CXY_FROM_PID( process->pid ) == local_cxy) ,
1907	"process descriptor not in owner cluster" );
1908
1909	// check terminal index
1910	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
1911	"illegal TXT terminal index" );
1912
1913	// get pointers on TXT_RX[txt_id] chdev
1914	chdev_xp = chdev_dir.txt_rx[txt_id];
1915	chdev_cxy = GET_CXY( chdev_xp );
1916	chdev_ptr = GET_PTR( chdev_xp );
1917
1918	// get extended pointer on root & lock of attached process list
1919	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
1920	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
1921
1922	// get lock protecting list of processes attached to TXT
1923	remote_busylock_acquire( lock_xp );
1924
1925	// insert process in attached process list
1926	xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) );
1927
1928	// release lock protecting list of processes attached to TXT
1929	remote_busylock_release( lock_xp );
1930
1931	#if DEBUG_PROCESS_TXT
1932	thread_t * this = CURRENT_THREAD;
1933	uint32_t cycle = (uint32_t)hal_get_cycles();
1934	if( DEBUG_PROCESS_TXT < cycle )
1935	printk("\n[%s] thread[%x,%x] attached process %x to TXT %d / cycle %d\n",
1936	__FUNCTION__, this->process->pid, this->trdid, process->pid, txt_id , cycle );
1937	#endif
1938
1939	} // end process_txt_attach()
1940
1941	/////////////////////////////////////////////
1942	void process_txt_detach( xptr_t process_xp )
1943	{
1944	process_t * process_ptr; // local pointer on process in owner cluster
1945	cxy_t process_cxy; // process owner cluster
1946	pid_t process_pid; // process identifier
1947	xptr_t file_xp; // extended pointer on stdin file
1948	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
1949	cxy_t chdev_cxy; // TXT_RX chdev cluster
1950	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
1951	xptr_t lock_xp; // extended pointer on list lock in chdev
1952
1953	// get process cluster, local pointer, and PID
1954	process_cxy = GET_CXY( process_xp );
1955	process_ptr = GET_PTR( process_xp );
1956	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
1957
1958	// check process descriptor in owner cluster
1959	assert( (CXY_FROM_PID( process_pid ) == process_cxy ) ,
1960	"process descriptor not in owner cluster" );
1961
1962	// release TXT ownership (does nothing if not TXT owner)
1963	process_txt_transfer_ownership( process_xp );
1964
1965	// get extended pointer on process stdin file
1966	file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
1967
1968	// get pointers on TXT_RX chdev
1969	chdev_xp = chdev_from_file( file_xp );
1970	chdev_cxy = GET_CXY( chdev_xp );
1971	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
1972
1973	// get extended pointer on lock protecting attached process list
1974	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
1975
1976	// get lock protecting list of processes attached to TXT
1977	remote_busylock_acquire( lock_xp );
1978
1979	// unlink process from attached process list
1980	xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) );
1981
1982	// release lock protecting list of processes attached to TXT
1983	remote_busylock_release( lock_xp );
1984
1985	#if DEBUG_PROCESS_TXT
1986	thread_t * this = CURRENT_THREAD;
1987	uint32_t cycle = (uint32_t)hal_get_cycles();
1988	uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
1989	if( DEBUG_PROCESS_TXT < cycle )
1990	printk("\n[%s] thread[%x,%x] detached process %x from TXT %d / cycle %d\n",
1991	__FUNCTION__, this->process->pid, this->trdid, process_pid, txt_id, cycle );
1992	#endif
1993
1994	} // end process_txt_detach()
1995
1996	///////////////////////////////////////////////////
1997	void process_txt_set_ownership( xptr_t process_xp )
1998	{
1999	process_t * process_ptr;
2000	cxy_t process_cxy;
2001	pid_t process_pid;
2002	xptr_t file_xp;
2003	xptr_t txt_xp;
2004	chdev_t * txt_ptr;
2005	cxy_t txt_cxy;
2006
2007	// get pointers on process in owner cluster
2008	process_cxy = GET_CXY( process_xp );
2009	process_ptr = GET_PTR( process_xp );
2010	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2011
2012	// check owner cluster
2013	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2014	"process descriptor not in owner cluster\n" );
2015
2016	// get extended pointer on stdin pseudo file
2017	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2018
2019	// get pointers on TXT chdev
2020	txt_xp = chdev_from_file( file_xp );
2021	txt_cxy = GET_CXY( txt_xp );
2022	txt_ptr = GET_PTR( txt_xp );
2023
2024	// set owner field in TXT chdev
2025	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
2026
2027	#if DEBUG_PROCESS_TXT
2028	thread_t * this = CURRENT_THREAD;
2029	uint32_t cycle = (uint32_t)hal_get_cycles();
2030	uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
2031	if( DEBUG_PROCESS_TXT < cycle )
2032	printk("\n[%s] thread[%x,%x] give TXT %d to process %x / cycle %d\n",
2033	__FUNCTION__, this->process->pid, this->trdid, txt_id, process_pid, cycle );
2034	#endif
2035
2036	} // end process_txt_set ownership()
2037
2038	////////////////////////////////////////////////////////
2039	void process_txt_transfer_ownership( xptr_t process_xp )
2040	{
2041	process_t * process_ptr; // local pointer on process releasing ownership
2042	cxy_t process_cxy; // process cluster
2043	pid_t process_pid; // process identifier
2044	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
2045	xptr_t txt_xp; // extended pointer on TXT_RX chdev
2046	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
2047	cxy_t txt_cxy; // cluster of TXT_RX chdev
2048	uint32_t txt_id; // TXT_RX channel
2049	xptr_t owner_xp; // extended pointer on current TXT_RX owner
2050	xptr_t root_xp; // extended pointer on root of attached process list
2051	xptr_t lock_xp; // extended pointer on lock protecting attached process list
2052	xptr_t iter_xp; // iterator for xlist
2053	xptr_t current_xp; // extended pointer on current process
2054	process_t * current_ptr; // local pointer on current process
2055	cxy_t current_cxy; // cluster for current process
2056
2057	#if DEBUG_PROCESS_TXT
2058	thread_t * this = CURRENT_THREAD;
2059	uint32_t cycle;
2060	#endif
2061
2062	// get pointers on process in owner cluster
2063	process_cxy = GET_CXY( process_xp );
2064	process_ptr = GET_PTR( process_xp );
2065	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2066
2067	// check owner cluster
2068	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2069	"process descriptor not in owner cluster\n" );
2070
2071	// get extended pointer on stdin pseudo file
2072	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2073
2074	// get pointers on TXT chdev
2075	txt_xp = chdev_from_file( file_xp );
2076	txt_cxy = GET_CXY( txt_xp );
2077	txt_ptr = GET_PTR( txt_xp );
2078
2079	// get extended pointer on TXT_RX owner and TXT channel
2080	owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2081	txt_id = hal_remote_l32 ( XPTR( txt_cxy , &txt_ptr->channel ) );
2082
2083	// transfer ownership only if process is the TXT owner
2084	if( (owner_xp == process_xp) && (txt_id > 0) )
2085	{
2086	// get extended pointers on root and lock of attached processes list
2087	root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root );
2088	lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock );
2089
2090	// get lock
2091	remote_busylock_acquire( lock_xp );
2092
2093	if( process_get_ppid( process_xp ) != 1 ) // process is not KSH
2094	{
2095	// scan attached process list to find KSH process
2096	XLIST_FOREACH( root_xp , iter_xp )
2097	{
2098	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2099	current_cxy = GET_CXY( current_xp );
2100	current_ptr = GET_PTR( current_xp );
2101
2102	if( process_get_ppid( current_xp ) == 1 ) // current is KSH
2103	{
2104	// release lock
2105	remote_busylock_release( lock_xp );
2106
2107	// set owner field in TXT chdev
2108	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2109
2110	#if DEBUG_PROCESS_TXT
2111	cycle = (uint32_t)hal_get_cycles();
2112	uint32_t ksh_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
2113	if( DEBUG_PROCESS_TXT < cycle )
2114	printk("\n[%s] thread[%x,%x] release TXT %d to KSH %x / cycle %d\n",
2115	__FUNCTION__, this->process->pid, this->trdid, txt_id, ksh_pid, cycle );
2116	process_txt_display( txt_id );
2117	#endif
2118	return;
2119	}
2120	}
2121
2122	// release lock
2123	remote_busylock_release( lock_xp );
2124
2125	// PANIC if KSH not found
2126	assert( false , "KSH process not found for TXT %d" );
2127
2128	return;
2129	}
2130	else // process is KSH
2131	{
2132	// scan attached process list to find another process
2133	XLIST_FOREACH( root_xp , iter_xp )
2134	{
2135	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2136	current_cxy = GET_CXY( current_xp );
2137	current_ptr = GET_PTR( current_xp );
2138
2139	if( current_xp != process_xp ) // current is not KSH
2140	{
2141	// release lock
2142	remote_busylock_release( lock_xp );
2143
2144	// set owner field in TXT chdev
2145	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
2146
2147	#if DEBUG_PROCESS_TXT
2148	cycle = (uint32_t)hal_get_cycles();
2149	uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
2150	if( DEBUG_PROCESS_TXT < cycle )
2151	printk("\n[%s] thread[%x,%x] release TXT %d to process %x / cycle %d\n",
2152	__FUNCTION__,this->process->pid, this->trdid, txt_id, new_pid, cycle );
2153	process_txt_display( txt_id );
2154	#endif
2155	return;
2156	}
2157	}
2158
2159	// release lock
2160	remote_busylock_release( lock_xp );
2161
2162	// no more owner for TXT if no other process found
2163	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL );
2164
2165	#if DEBUG_PROCESS_TXT
2166	cycle = (uint32_t)hal_get_cycles();
2167	if( DEBUG_PROCESS_TXT < cycle )
2168	printk("\n[%s] thread[%x,%x] release TXT %d to nobody / cycle %d\n",
2169	__FUNCTION__, this->process->pid, this->trdid, txt_id, cycle );
2170	process_txt_display( txt_id );
2171	#endif
2172	return;
2173	}
2174	}
2175	else
2176	{
2177
2178	#if DEBUG_PROCESS_TXT
2179	cycle = (uint32_t)hal_get_cycles();
2180	if( DEBUG_PROCESS_TXT < cycle )
2181	printk("\n[%s] thread %x in process %d does nothing (not TXT owner) / cycle %d\n",
2182	__FUNCTION__, this->trdid, process_pid, cycle );
2183	process_txt_display( txt_id );
2184	#endif
2185
2186	}
2187	} // end process_txt_transfer_ownership()
2188
2189
2190	////////////////////////////////////////////////
2191	bool_t process_txt_is_owner( xptr_t process_xp )
2192	{
2193	// get local pointer and cluster of process in owner cluster
2194	cxy_t process_cxy = GET_CXY( process_xp );
2195	process_t * process_ptr = GET_PTR( process_xp );
2196
2197	// check calling thread execute in target process owner cluster
2198	pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
2199	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
2200	"process descriptor not in owner cluster\n" );
2201
2202	// get extended pointer on stdin pseudo file
2203	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
2204
2205	// get pointers on TXT chdev
2206	xptr_t txt_xp = chdev_from_file( file_xp );
2207	cxy_t txt_cxy = GET_CXY( txt_xp );
2208	chdev_t * txt_ptr = GET_PTR( txt_xp );
2209
2210	// get extended pointer on TXT_RX owner process
2211	xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
2212
2213	return (process_xp == owner_xp);
2214
2215	} // end process_txt_is_owner()
2216
2217	////////////////////////////////////////////////
2218	xptr_t process_txt_get_owner( uint32_t channel )
2219	{
2220	xptr_t txt_rx_xp = chdev_dir.txt_rx[channel];
2221	cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp );
2222	chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp );
2223
2224	return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) );
2225
2226	} // end process_txt_get_owner()
2227
2228	///////////////////////////////////////////
2229	void process_txt_display( uint32_t txt_id )
2230	{
2231	xptr_t chdev_xp;
2232	cxy_t chdev_cxy;
2233	chdev_t * chdev_ptr;
2234	xptr_t root_xp;
2235	xptr_t lock_xp;
2236	xptr_t current_xp;
2237	xptr_t iter_xp;
2238	cxy_t txt0_cxy;
2239	chdev_t * txt0_ptr;
2240	xptr_t txt0_xp;
2241	xptr_t txt0_lock_xp;
2242
2243	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
2244	"illegal TXT terminal index" );
2245
2246	// get pointers on TXT0 chdev
2247	txt0_xp = chdev_dir.txt_tx[0];
2248	txt0_cxy = GET_CXY( txt0_xp );
2249	txt0_ptr = GET_PTR( txt0_xp );
2250
2251	// get extended pointer on TXT0 lock
2252	txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
2253
2254	// get pointers on TXT_RX[txt_id] chdev
2255	chdev_xp = chdev_dir.txt_rx[txt_id];
2256	chdev_cxy = GET_CXY( chdev_xp );
2257	chdev_ptr = GET_PTR( chdev_xp );
2258
2259	// get extended pointer on root & lock of attached process list
2260	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
2261	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
2262
2263	// get lock on attached process list
2264	remote_busylock_acquire( lock_xp );
2265
2266	// get TXT0 lock in busy waiting mode
2267	remote_busylock_acquire( txt0_lock_xp );
2268
2269	// display header
2270	nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n",
2271	txt_id , (uint32_t)hal_get_cycles() );
2272
2273	// scan attached process list
2274	XLIST_FOREACH( root_xp , iter_xp )
2275	{
2276	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
2277	process_display( current_xp );
2278	}
2279
2280	// release TXT0 lock in busy waiting mode
2281	remote_busylock_release( txt0_lock_xp );
2282
2283	// release lock on attached process list
2284	remote_busylock_release( lock_xp );
2285
2286	} // end process_txt_display

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