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source: trunk/kernel/kern/process.c @ 568

Last change on this file since 568 was 564, checked in by alain, 6 years ago
Complete restructuration of kernel locks.
File size: 76.8 KB

Rev	Line
[1]	1	/*
[564]	2	* process.c - process related functions definition.
[172]	3	*
[1]	4	* Authors Ghassan Almaless (2008,2009,2010,2011,2012)
	5	* Mohamed Lamine Karaoui (2015)
[433]	6	* Alain Greiner (2016,2017,2018)
[1]	7	*
	8	* Copyright (c) UPMC Sorbonne Universites
	9	*
[409]	10	* This file is part of ALMOS-MKH.
[1]	11	*
[172]	12	* ALMOS-MKH is free software; you can redistribute it and/or modify it
[1]	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	*
[172]	16	* ALMOS-MKH is distributed in the hope that it will be useful, but
[1]	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
[172]	22	* along with ALMOS-MKH; if not, write to the Free Software Foundation,
[1]	23	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	24	*/
	25
[14]	26	#include <kernel_config.h>
[457]	27	#include <hal_kernel_types.h>
[1]	28	#include <hal_remote.h>
	29	#include <hal_uspace.h>
[409]	30	#include <hal_irqmask.h>
[1]	31	#include <errno.h>
	32	#include <printk.h>
	33	#include <memcpy.h>
	34	#include <bits.h>
	35	#include <kmem.h>
	36	#include <page.h>
	37	#include <vmm.h>
	38	#include <vfs.h>
	39	#include <core.h>
	40	#include <thread.h>
[428]	41	#include <chdev.h>
[1]	42	#include <list.h>
[407]	43	#include <string.h>
[1]	44	#include <scheduler.h>
[564]	45	#include <busylock.h>
	46	#include <queuelock.h>
	47	#include <remote_queuelock.h>
	48	#include <rwlock.h>
	49	#include <remote_rwlock.h>
[1]	50	#include <dqdt.h>
	51	#include <cluster.h>
	52	#include <ppm.h>
	53	#include <boot_info.h>
	54	#include <process.h>
	55	#include <elf.h>
[23]	56	#include <syscalls.h>
[435]	57	#include <shared_syscalls.h>
[1]	58
	59	//////////////////////////////////////////////////////////////////////////////////////////
	60	// Extern global variables
	61	//////////////////////////////////////////////////////////////////////////////////////////
	62
[428]	63	extern process_t process_zero; // allocated in kernel_init.c
	64	extern chdev_directory_t chdev_dir; // allocated in kernel_init.c
[1]	65
	66	//////////////////////////////////////////////////////////////////////////////////////////
	67	// Process initialisation related functions
	68	//////////////////////////////////////////////////////////////////////////////////////////
	69
	70	///////////////////////////
[503]	71	process_t * process_alloc( void )
[1]	72	{
	73	kmem_req_t req;
	74
	75	req.type = KMEM_PROCESS;
	76	req.size = sizeof(process_t);
	77	req.flags = AF_KERNEL;
	78
	79	return (process_t *)kmem_alloc( &req );
	80	}
	81
	82	////////////////////////////////////////
	83	void process_free( process_t * process )
	84	{
	85	kmem_req_t req;
	86
	87	req.type = KMEM_PROCESS;
	88	req.ptr = process;
	89	kmem_free( &req );
	90	}
	91
[101]	92	/////////////////////////////////////////////////
	93	void process_reference_init( process_t * process,
	94	pid_t pid,
[457]	95	xptr_t parent_xp )
[1]	96	{
[428]	97	cxy_t parent_cxy;
	98	process_t * parent_ptr;
[407]	99	xptr_t stdin_xp;
	100	xptr_t stdout_xp;
	101	xptr_t stderr_xp;
	102	uint32_t stdin_id;
	103	uint32_t stdout_id;
	104	uint32_t stderr_id;
[415]	105	error_t error;
[428]	106	uint32_t txt_id;
	107	char rx_path[40];
	108	char tx_path[40];
[440]	109	xptr_t file_xp;
[428]	110	xptr_t chdev_xp;
	111	chdev_t * chdev_ptr;
	112	cxy_t chdev_cxy;
	113	pid_t parent_pid;
[1]	114
[428]	115	// get parent process cluster and local pointer
	116	parent_cxy = GET_CXY( parent_xp );
[435]	117	parent_ptr = GET_PTR( parent_xp );
[204]	118
[457]	119	// get parent_pid
[564]	120	parent_pid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
[428]	121
[438]	122	#if DEBUG_PROCESS_REFERENCE_INIT
[433]	123	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	124	if( DEBUG_PROCESS_REFERENCE_INIT )
[457]	125	printk("\n[DBG] %s : thread %x in process %x enter to initalialize process %x / cycle %d\n",
	126	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid , pid , cycle );
[433]	127	#endif
[428]	128
	129	// initialize PID, REF_XP, PARENT_XP, and STATE
[433]	130	process->pid = pid;
	131	process->ref_xp = XPTR( local_cxy , process );
[443]	132	process->owner_xp = XPTR( local_cxy , process );
[433]	133	process->parent_xp = parent_xp;
	134	process->term_state = 0;
[428]	135
[409]	136	// initialize vmm as empty
[415]	137	error = vmm_init( process );
[564]	138
	139	assert( (error == 0) , "cannot initialize VMM\n" );
[415]	140
[438]	141	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
[433]	142	cycle = (uint32_t)hal_get_cycles();
[438]	143	if( DEBUG_PROCESS_REFERENCE_INIT )
[457]	144	printk("\n[DBG] %s : thread %x in process %x / vmm empty for process %x / cycle %d\n",
[564]	145	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid , pid, cycle );
[433]	146	#endif
[1]	147
[409]	148	// initialize fd_array as empty
[408]	149	process_fd_init( process );
[1]	150
[428]	151	// define the stdin/stdout/stderr pseudo files <=> select a TXT terminal.
[457]	152	if( (pid == 1) \|\| (parent_pid == 1)) // INIT or KSH process
[408]	153	{
[457]	154	// allocate a TXT channel
	155	if( pid == 1 ) txt_id = 0; // INIT
	156	else txt_id = process_txt_alloc(); // KSH
[428]	157
[457]	158	// attach process to TXT
[428]	159	process_txt_attach( process , txt_id );
	160
[457]	161	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
	162	cycle = (uint32_t)hal_get_cycles();
	163	if( DEBUG_PROCESS_REFERENCE_INIT )
	164	printk("\n[DBG] %s : thread %x in process %x / process %x attached to TXT%d / cycle %d\n",
	165	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, txt_id, cycle );
	166	#endif
[428]	167	// build path to TXT_RX[i] and TXT_TX[i] chdevs
	168	snprintf( rx_path , 40 , "/dev/external/txt%d_rx", txt_id );
	169	snprintf( tx_path , 40 , "/dev/external/txt%d_tx", txt_id );
	170
	171	// create stdin pseudo file
	172	error = vfs_open( process,
	173	rx_path,
[408]	174	O_RDONLY,
	175	0, // FIXME chmod
	176	&stdin_xp,
	177	&stdin_id );
[1]	178
[564]	179	assert( (error == 0) , "cannot open stdin pseudo file" );
	180	assert( (stdin_id == 0) , "stdin index must be 0" );
[428]	181
[440]	182	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
	183	cycle = (uint32_t)hal_get_cycles();
	184	if( DEBUG_PROCESS_REFERENCE_INIT )
[457]	185	printk("\n[DBG] %s : thread %x in process %x / stdin open for process %x / cycle %d\n",
	186	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle );
[440]	187	#endif
	188
[428]	189	// create stdout pseudo file
	190	error = vfs_open( process,
	191	tx_path,
[408]	192	O_WRONLY,
	193	0, // FIXME chmod
	194	&stdout_xp,
	195	&stdout_id );
[1]	196
[492]	197	assert( (error == 0) , "cannot open stdout pseudo file" );
	198	assert( (stdout_id == 1) , "stdout index must be 1" );
[428]	199
[440]	200	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
	201	cycle = (uint32_t)hal_get_cycles();
	202	if( DEBUG_PROCESS_REFERENCE_INIT )
[457]	203	printk("\n[DBG] %s : thread %x in process %x / stdout open for process %x / cycle %d\n",
	204	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle );
[440]	205	#endif
	206
[428]	207	// create stderr pseudo file
	208	error = vfs_open( process,
	209	tx_path,
[408]	210	O_WRONLY,
	211	0, // FIXME chmod
	212	&stderr_xp,
	213	&stderr_id );
[428]	214
[492]	215	assert( (error == 0) , "cannot open stderr pseudo file" );
	216	assert( (stderr_id == 2) , "stderr index must be 2" );
[428]	217
[440]	218	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
	219	cycle = (uint32_t)hal_get_cycles();
	220	if( DEBUG_PROCESS_REFERENCE_INIT )
[457]	221	printk("\n[DBG] %s : thread %x in process %x / stderr open for process %x / cycle %d\n",
	222	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle );
[440]	223	#endif
	224
[408]	225	}
[428]	226	else // normal user process
[408]	227	{
[457]	228	// get extended pointer on stdin pseudo file in parent process
[564]	229	file_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy , &parent_ptr->fd_array.array[0] ) );
[440]	230
[457]	231	// get extended pointer on parent process TXT chdev
[440]	232	chdev_xp = chdev_from_file( file_xp );
[428]	233
	234	// get cluster and local pointer on chdev
	235	chdev_cxy = GET_CXY( chdev_xp );
[435]	236	chdev_ptr = GET_PTR( chdev_xp );
[428]	237
[564]	238	// get parent process TXT terminal index
	239	txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
[407]	240
[564]	241	// attach child process to parent process TXT terminal
[428]	242	process_txt_attach( process , txt_id );
[407]	243
[457]	244	// copy all open files from parent process fd_array to this process
[428]	245	process_fd_remote_copy( XPTR( local_cxy , &process->fd_array ),
[457]	246	XPTR( parent_cxy , &parent_ptr->fd_array ) );
[408]	247	}
[407]	248
[409]	249	// initialize specific inodes root and cwd
[564]	250	process->vfs_root_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy,
[457]	251	&parent_ptr->vfs_root_xp ) );
[564]	252	process->vfs_cwd_xp = (xptr_t)hal_remote_l64( XPTR( parent_cxy,
[457]	253	&parent_ptr->vfs_cwd_xp ) );
[409]	254	vfs_inode_remote_up( process->vfs_root_xp );
	255	vfs_inode_remote_up( process->vfs_cwd_xp );
[408]	256
[564]	257	remote_rwlock_init( XPTR( local_cxy , &process->cwd_lock ), LOCK_PROCESS_CWD );
[409]	258
[438]	259	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
[433]	260	cycle = (uint32_t)hal_get_cycles();
[438]	261	if( DEBUG_PROCESS_REFERENCE_INIT )
[564]	262	printk("\n[DBG] %s : thread %x in process %x / set fd_array for process %x / cycle %d\n",
	263	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid , cycle );
[433]	264	#endif
[407]	265
[408]	266	// reset children list root
	267	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
	268	process->children_nr = 0;
[564]	269	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ), LOCK_PROCESS_CHILDREN );
[407]	270
[408]	271	// reset semaphore / mutex / barrier / condvar list roots
	272	xlist_root_init( XPTR( local_cxy , &process->sem_root ) );
	273	xlist_root_init( XPTR( local_cxy , &process->mutex_root ) );
	274	xlist_root_init( XPTR( local_cxy , &process->barrier_root ) );
	275	xlist_root_init( XPTR( local_cxy , &process->condvar_root ) );
[564]	276	remote_queuelock_init( XPTR( local_cxy , &process->sync_lock ), LOCK_PROCESS_USERSYNC );
[407]	277
[408]	278	// register new process in the local cluster manager pref_tbl[]
	279	lpid_t lpid = LPID_FROM_PID( pid );
	280	LOCAL_CLUSTER->pmgr.pref_tbl[lpid] = XPTR( local_cxy , process );
[407]	281
[408]	282	// register new process descriptor in local cluster manager local_list
	283	cluster_process_local_link( process );
[407]	284
[408]	285	// register new process descriptor in local cluster manager copies_list
	286	cluster_process_copies_link( process );
[172]	287
[564]	288	// initialize th_tbl[] array and associated threads
[1]	289	uint32_t i;
[564]	290
	291	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
[1]	292	{
	293	process->th_tbl[i] = NULL;
	294	}
	295	process->th_nr = 0;
[564]	296	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
[1]	297
[124]	298	hal_fence();
[1]	299
[438]	300	#if (DEBUG_PROCESS_REFERENCE_INIT & 1)
[433]	301	cycle = (uint32_t)hal_get_cycles();
[438]	302	if( DEBUG_PROCESS_REFERENCE_INIT )
[564]	303	printk("\n[DBG] %s : thread %x in process %x exit for process %x / cycle %d\n",
	304	__FUNCTION__, CURRENT_THREAD->trdid, parent_pid, pid, cycle );
[433]	305	#endif
[101]	306
[428]	307	} // process_reference_init()
[204]	308
[1]	309	/////////////////////////////////////////////////////
	310	error_t process_copy_init( process_t * local_process,
	311	xptr_t reference_process_xp )
	312	{
[415]	313	error_t error;
	314
[23]	315	// get reference process cluster and local pointer
	316	cxy_t ref_cxy = GET_CXY( reference_process_xp );
[435]	317	process_t * ref_ptr = GET_PTR( reference_process_xp );
[1]	318
[428]	319	// initialize PID, REF_XP, PARENT_XP, and STATE
[564]	320	local_process->pid = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->pid ) );
	321	local_process->parent_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->parent_xp ) );
[433]	322	local_process->ref_xp = reference_process_xp;
[443]	323	local_process->owner_xp = reference_process_xp;
[433]	324	local_process->term_state = 0;
[407]	325
[564]	326	#if DEBUG_PROCESS_COPY_INIT
	327	thread_t * this = CURRET_THREAD;
[433]	328	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	329	if( DEBUG_PROCESS_COPY_INIT )
[564]	330	printk("\n[DBG] %s : thread %x in process %x enter for process %x / cycle %d\n",
	331	__FUNCTION__, this->trdid, this->process->pid, local_process->pid, cycle );
[433]	332	#endif
[407]	333
[564]	334	// check user process
	335	assert( (local_process->pid != 0), "PID cannot be 0" );
	336
[172]	337	// reset local process vmm
[415]	338	error = vmm_init( local_process );
[492]	339	assert( (error == 0) , "cannot initialize VMM\n");
[1]	340
[172]	341	// reset process file descriptors array
[23]	342	process_fd_init( local_process );
[1]	343
[23]	344	// reset vfs_root_xp / vfs_bin_xp / vfs_cwd_xp fields
[564]	345	local_process->vfs_root_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_root_xp ) );
	346	local_process->vfs_bin_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_bin_xp ) );
[23]	347	local_process->vfs_cwd_xp = XPTR_NULL;
[1]	348
	349	// reset children list root (not used in a process descriptor copy)
	350	xlist_root_init( XPTR( local_cxy , &local_process->children_root ) );
[172]	351	local_process->children_nr = 0;
[564]	352	remote_queuelock_init( XPTR( local_cxy , &local_process->children_lock ),
	353	LOCK_PROCESS_CHILDREN );
[1]	354
[428]	355	// reset children_list (not used in a process descriptor copy)
	356	xlist_entry_init( XPTR( local_cxy , &local_process->children_list ) );
[1]	357
	358	// reset semaphores list root (not used in a process descriptor copy)
	359	xlist_root_init( XPTR( local_cxy , &local_process->sem_root ) );
[23]	360	xlist_root_init( XPTR( local_cxy , &local_process->mutex_root ) );
	361	xlist_root_init( XPTR( local_cxy , &local_process->barrier_root ) );
	362	xlist_root_init( XPTR( local_cxy , &local_process->condvar_root ) );
[1]	363
[564]	364	// initialize th_tbl[] array and associated fields
[1]	365	uint32_t i;
[564]	366	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
[1]	367	{
	368	local_process->th_tbl[i] = NULL;
	369	}
	370	local_process->th_nr = 0;
[564]	371	rwlock_init( &local_process->th_lock , LOCK_PROCESS_THTBL );
[1]	372
[564]	373
[1]	374	// register new process descriptor in local cluster manager local_list
	375	cluster_process_local_link( local_process );
	376
	377	// register new process descriptor in owner cluster manager copies_list
	378	cluster_process_copies_link( local_process );
	379
[124]	380	hal_fence();
[1]	381
[438]	382	#if DEBUG_PROCESS_COPY_INIT
[433]	383	cycle = (uint32_t)hal_get_cycles();
[438]	384	if( DEBUG_PROCESS_COPY_INIT )
[564]	385	printk("\n[DBG] %s : thread %x in process %x exit for process %x / cycle %d\n",
	386	__FUNCTION__, this->trdid, this->process->pid, local_process->pid, cycle );
[433]	387	#endif
[279]	388
[1]	389	return 0;
	390
[204]	391	} // end process_copy_init()
	392
[1]	393	///////////////////////////////////////////
	394	void process_destroy( process_t * process )
	395	{
[428]	396	xptr_t parent_xp;
	397	process_t * parent_ptr;
	398	cxy_t parent_cxy;
	399	xptr_t children_lock_xp;
[446]	400	xptr_t children_nr_xp;
[1]	401
[437]	402	pid_t pid = process->pid;
	403
[492]	404	assert( (process->th_nr == 0) ,
[437]	405	"process %x in cluster %x has still active threads", pid , local_cxy );
[428]	406
[438]	407	#if DEBUG_PROCESS_DESTROY
[433]	408	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	409	if( DEBUG_PROCESS_DESTROY )
[564]	410	printk("\n[DBG] %s : thread %x in process %x enter for process %x in cluster %x / cycle %d\n",
	411	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, pid, local_cxy, cycle );
[433]	412	#endif
[428]	413
[436]	414	// remove process from local_list in local cluster manager
	415	cluster_process_local_unlink( process );
[1]	416
[436]	417	// remove process from copies_list in owner cluster manager
	418	cluster_process_copies_unlink( process );
[23]	419
[450]	420	// remove process from children_list
	421	// and release PID if owner cluster
[437]	422	if( CXY_FROM_PID( pid ) == local_cxy )
[428]	423	{
	424	// get pointers on parent process
	425	parent_xp = process->parent_xp;
	426	parent_cxy = GET_CXY( parent_xp );
	427	parent_ptr = GET_PTR( parent_xp );
	428
	429	// get extended pointer on children_lock in parent process
	430	children_lock_xp = XPTR( parent_cxy , &parent_ptr->children_lock );
[446]	431	children_nr_xp = XPTR( parent_cxy , &parent_ptr->children_nr );
[428]	432
	433	// remove process from children_list
[564]	434	remote_queuelock_acquire( children_lock_xp );
[428]	435	xlist_unlink( XPTR( local_cxy , &process->children_list ) );
[446]	436	hal_remote_atomic_add( children_nr_xp , -1 );
[564]	437	remote_queuelock_release( children_lock_xp );
[450]	438
[564]	439	// release the process PID to cluster manager
	440	cluster_pid_release( pid );
[428]	441	}
	442
[564]	443	// FIXME close all open files and synchronize dirty [AG]
[23]	444
[428]	445	// decrease refcount for bin file, root file and cwd file
[337]	446	if( process->vfs_bin_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_bin_xp );
	447	if( process->vfs_root_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_root_xp );
	448	if( process->vfs_cwd_xp != XPTR_NULL ) vfs_file_count_down( process->vfs_cwd_xp );
[1]	449
	450	// Destroy VMM
	451	vmm_destroy( process );
	452
[416]	453	// release memory allocated to process descriptor
	454	process_free( process );
[1]	455
[438]	456	#if DEBUG_PROCESS_DESTROY
[433]	457	cycle = (uint32_t)hal_get_cycles();
[438]	458	if( DEBUG_PROCESS_DESTROY )
[564]	459	printk("\n[DBG] %s : thread %x in process %x exit / process %x in cluster %x / cycle %d\n",
	460	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, pid, local_cxy, cycle );
[433]	461	#endif
[428]	462
[407]	463	} // end process_destroy()
	464
[409]	465	/////////////////////////////////////////////////
[527]	466	const char * process_action_str( process_sigactions_t action_type )
[409]	467	{
[527]	468	switch ( action_type ) {
	469	case BLOCK_ALL_THREADS: return "BLOCK";
	470	case UNBLOCK_ALL_THREADS: return "UNBLOCK";
	471	case DELETE_ALL_THREADS: return "DELETE";
	472	default: return "undefined";
	473	}
[409]	474	}
	475
[435]	476	////////////////////////////////////////
	477	void process_sigaction( pid_t pid,
[457]	478	uint32_t type )
[409]	479	{
	480	cxy_t owner_cxy; // owner cluster identifier
	481	lpid_t lpid; // process index in owner cluster
	482	cluster_t * cluster; // pointer on cluster manager
	483	xptr_t root_xp; // extended pointer on root of copies
	484	xptr_t lock_xp; // extended pointer on lock protecting copies
	485	xptr_t iter_xp; // iterator on copies list
	486	xptr_t process_xp; // extended pointer on process copy
	487	cxy_t process_cxy; // process copy cluster identifier
[457]	488	process_t * process_ptr; // local pointer on process copy
[436]	489	reg_t save_sr; // for critical section
	490	rpc_desc_t rpc; // shared RPC descriptor
[457]	491	thread_t * client; // pointer on client thread
	492	xptr_t client_xp; // extended pointer on client thread
	493	process_t * local; // pointer on process copy in local cluster
	494	uint32_t remote_nr; // number of remote process copies
[409]	495
[457]	496	client = CURRENT_THREAD;
	497	client_xp = XPTR( local_cxy , client );
	498	local = NULL;
	499	remote_nr = 0;
[435]	500
[564]	501	// check calling thread can yield
	502	assert( (client->busylocks == 0),
	503	"cannot yield : busylocks = %d\n", client->busylocks );
	504
[438]	505	#if DEBUG_PROCESS_SIGACTION
[433]	506	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	507	if( DEBUG_PROCESS_SIGACTION < cycle )
[457]	508	printk("\n[DBG] %s : thread %x in process %x enter to %s process %x / cycle %d\n",
	509	__FUNCTION__ , client->trdid, client->process->pid,
	510	process_action_str( type ) , pid , cycle );
[433]	511	#endif
[409]	512
[436]	513	// get pointer on local cluster manager
[416]	514	cluster = LOCAL_CLUSTER;
	515
[409]	516	// get owner cluster identifier and process lpid
[435]	517	owner_cxy = CXY_FROM_PID( pid );
	518	lpid = LPID_FROM_PID( pid );
[409]	519
[435]	520	// get root of list of copies, lock, and number of copies from owner cluster
[436]	521	root_xp = XPTR( owner_cxy , &cluster->pmgr.copies_root[lpid] );
	522	lock_xp = XPTR( owner_cxy , &cluster->pmgr.copies_lock[lpid] );
[435]	523
[416]	524	// check action type
[457]	525	assert( ((type == DELETE_ALL_THREADS ) \|\|
	526	(type == BLOCK_ALL_THREADS ) \|\|
[492]	527	(type == UNBLOCK_ALL_THREADS )), "illegal action type" );
[416]	528
	529
[457]	530	// The client thread send parallel RPCs to all remote clusters containing
[564]	531	// target process copies, wait all responses, and then handles directly
	532	// the threads in local cluster, when required.
[457]	533	// The client thread allocates a - shared - RPC descriptor in the stack,
	534	// because all parallel, non-blocking, server threads use the same input
	535	// arguments, and use the shared RPC response field
[436]	536
	537	// mask IRQs
	538	hal_disable_irq( &save_sr);
	539
[457]	540	// client thread blocks itself
	541	thread_block( client_xp , THREAD_BLOCKED_RPC );
[436]	542
[564]	543	// take the lock protecting process copies
	544	remote_queuelock_acquire( lock_xp );
[409]	545
[436]	546	// initialize shared RPC descriptor
[438]	547	rpc.responses = 0;
	548	rpc.blocking = false;
	549	rpc.index = RPC_PROCESS_SIGACTION;
	550	rpc.thread = client;
	551	rpc.lid = client->core->lid;
[457]	552	rpc.args[0] = type;
[438]	553	rpc.args[1] = pid;
[436]	554
[457]	555	// scan list of process copies
	556	// to send RPCs to remote copies
[409]	557	XLIST_FOREACH( root_xp , iter_xp )
	558	{
[457]	559	// get extended pointers and cluster on process
[440]	560	process_xp = XLIST_ELEMENT( iter_xp , process_t , copies_list );
	561	process_cxy = GET_CXY( process_xp );
[457]	562	process_ptr = GET_PTR( process_xp );
[440]	563
[457]	564	if( process_cxy == local_cxy ) // process is local
	565	{
	566	local = process_ptr;
	567	}
	568	else // process is remote
	569	{
	570	// update number of remote process copies
	571	remote_nr++;
	572
	573	// atomically increment responses counter
	574	hal_atomic_add( (void *)&rpc.responses , 1 );
	575
[438]	576	#if DEBUG_PROCESS_SIGACTION
	577	if( DEBUG_PROCESS_SIGACTION < cycle )
[457]	578	printk("\n[DBG] %s : thread %x in process %x handles remote process %x in cluster %x\n",
	579	__FUNCTION__, client->trdid, client->process->pid, pid , process_cxy );
[433]	580	#endif
[457]	581	// call RPC in target cluster
	582	rpc_process_sigaction_client( process_cxy , &rpc );
	583	}
	584	} // end list of copies
	585
[409]	586	// release the lock protecting process copies
[564]	587	remote_queuelock_release( lock_xp );
[409]	588
[436]	589	// restore IRQs
	590	hal_restore_irq( save_sr);
[409]	591
[457]	592	// - if there is remote process copies, the client thread deschedules,
	593	// (it will be unblocked by the last RPC server thread).
	594	// - if there is no remote copies, the client thread unblock itself.
	595	if( remote_nr )
	596	{
	597	sched_yield("blocked on rpc_process_sigaction");
	598	}
	599	else
	600	{
	601	thread_unblock( client_xp , THREAD_BLOCKED_RPC );
	602	}
[409]	603
[457]	604	// handle the local process copy if required
	605	if( local != NULL )
	606	{
	607
	608	#if DEBUG_PROCESS_SIGACTION
	609	if( DEBUG_PROCESS_SIGACTION < cycle )
	610	printk("\n[DBG] %s : thread %x in process %x handles local process %x in cluster %x\n",
	611	__FUNCTION__, client->trdid, client->process->pid, pid , local_cxy );
	612	#endif
	613	if (type == DELETE_ALL_THREADS ) process_delete_threads ( local , client_xp );
	614	else if(type == BLOCK_ALL_THREADS ) process_block_threads ( local , client_xp );
	615	else if(type == UNBLOCK_ALL_THREADS ) process_unblock_threads( local );
	616	}
	617
[438]	618	#if DEBUG_PROCESS_SIGACTION
[433]	619	cycle = (uint32_t)hal_get_cycles();
[438]	620	if( DEBUG_PROCESS_SIGACTION < cycle )
[457]	621	printk("\n[DBG] %s : thread %x in process %x exit after %s process %x / cycle %d\n",
	622	__FUNCTION__, client->trdid, client->process->pid,
	623	process_action_str( type ), pid, cycle );
[433]	624	#endif
[416]	625
[409]	626	} // end process_sigaction()
	627
[433]	628	/////////////////////////////////////////////////
[440]	629	void process_block_threads( process_t * process,
	630	xptr_t client_xp )
[1]	631	{
[409]	632	thread_t * target; // pointer on target thread
[433]	633	thread_t * this; // pointer on calling thread
[564]	634	uint32_t ltid; // index in process th_tbl[]
[436]	635	cxy_t owner_cxy; // target process owner cluster
[409]	636	uint32_t count; // requests counter
[436]	637	volatile uint32_t ack_count; // scheduler acknowledge counter
[1]	638
[416]	639	// get calling thread pointer
[433]	640	this = CURRENT_THREAD;
[407]	641
[438]	642	#if DEBUG_PROCESS_SIGACTION
[564]	643	pid_t pid = process->pid;
[433]	644	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	645	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	646	printk("\n[DBG] %s : thread %x in process %x enter for process %x in cluster %x / cycle %d\n",
	647	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy , cycle );
[433]	648	#endif
[409]	649
[564]	650	// check target process is an user process
	651	assert( ( process->pid != 0 ),
	652	"target process must be an user process" );
	653
	654	// get target process owner cluster
	655	owner_cxy = CXY_FROM_PID( process->pid );
	656
[409]	657	// get lock protecting process th_tbl[]
[564]	658	rwlock_rd_acquire( &process->th_lock );
[1]	659
[440]	660	// loop on target process local threads
[409]	661	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
[436]	662	for( ltid = 0 , count = 0 , ack_count = 0 ; count < process->th_nr ; ltid++ )
[1]	663	{
[409]	664	target = process->th_tbl[ltid];
[1]	665
[436]	666	if( target != NULL ) // thread exist
[1]	667	{
	668	count++;
[409]	669
[440]	670	// main thread and client thread should not be blocked
	671	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
	672	(client_xp) != XPTR( local_cxy , target ) ) // not client thread
[416]	673	{
	674	// set the global blocked bit in target thread descriptor.
[436]	675	thread_block( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
	676
	677	// - if the calling thread and the target thread are on the same core,
	678	// we don't need confirmation from scheduler,
	679	// - if the calling thread and the target thread are not running on the same
	680	// core, we ask the target scheduler to acknowlege the blocking
	681	// to be sure that the target thread is not running.
	682
	683	if( this->core->lid != target->core->lid )
	684	{
	685	// increment responses counter
	686	hal_atomic_add( (void*)&ack_count , 1 );
[409]	687
[436]	688	// set FLAG_REQ_ACK and &ack_rsp_count in target descriptor
	689	thread_set_req_ack( target , (uint32_t *)&ack_count );
[409]	690
[436]	691	// force scheduling on target thread
	692	dev_pic_send_ipi( local_cxy , target->core->lid );
	693	}
[409]	694	}
[1]	695	}
[172]	696	}
	697
[428]	698	// release lock protecting process th_tbl[]
[564]	699	rwlock_rd_release( &process->th_lock );
[416]	700
[564]	701	// busy waiting acknowledges
	702	// TODO this could be improved...
[409]	703	while( 1 )
	704	{
[436]	705	// exit when all scheduler acknoledges received
	706	if ( ack_count == 0 ) break;
[409]	707
	708	// wait 1000 cycles before retry
	709	hal_fixed_delay( 1000 );
	710	}
[1]	711
[438]	712	#if DEBUG_PROCESS_SIGACTION
[433]	713	cycle = (uint32_t)hal_get_cycles();
[438]	714	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	715	printk("\n[DBG] %s : thread %x in process %x exit for process %x in cluster %x / cycle %d\n",
	716	__FUNCTION__, this, this->process->pid, pid, local_cxy , cycle );
[433]	717	#endif
[409]	718
[428]	719	} // end process_block_threads()
[409]	720
[440]	721	/////////////////////////////////////////////////
	722	void process_delete_threads( process_t * process,
	723	xptr_t client_xp )
[409]	724	{
[433]	725	thread_t * this; // pointer on calling thread
[440]	726	thread_t * target; // local pointer on target thread
	727	xptr_t target_xp; // extended pointer on target thread
	728	cxy_t owner_cxy; // owner process cluster
[409]	729	uint32_t ltid; // index in process th_tbl
[440]	730	uint32_t count; // threads counter
[409]	731
[433]	732	// get calling thread pointer
	733	this = CURRENT_THREAD;
[409]	734
[440]	735	// get target process owner cluster
	736	owner_cxy = CXY_FROM_PID( process->pid );
	737
[438]	738	#if DEBUG_PROCESS_SIGACTION
[564]	739	pid_t pid = process->pid;
[433]	740	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	741	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	742	printk("\n[DBG] %s : thread %x n process %x enter for process %x in cluster %x / cycle %d\n",
	743	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy , cycle );
[433]	744	#endif
	745
[564]	746	// check target process is an user process
	747	assert( ( process->pid != 0 ),
	748	"target process must be an user process" );
	749
[409]	750	// get lock protecting process th_tbl[]
[564]	751	rwlock_rd_acquire( &process->th_lock );
[409]	752
[440]	753	// loop on target process local threads
[416]	754	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
[440]	755	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
[1]	756	{
[409]	757	target = process->th_tbl[ltid];
[1]	758
[440]	759	if( target != NULL ) // valid thread
[1]	760	{
[416]	761	count++;
[440]	762	target_xp = XPTR( local_cxy , target );
[1]	763
[564]	764	// main thread and client thread should not be deleted
[440]	765	if( ((ltid != 0) \|\| (owner_cxy != local_cxy)) && // not main thread
	766	(client_xp) != target_xp ) // not client thread
	767	{
	768	// mark target thread for delete and block it
	769	thread_delete( target_xp , process->pid , false ); // not forced
	770	}
[409]	771	}
	772	}
[1]	773
[428]	774	// release lock protecting process th_tbl[]
[564]	775	rwlock_rd_release( &process->th_lock );
[407]	776
[438]	777	#if DEBUG_PROCESS_SIGACTION
[433]	778	cycle = (uint32_t)hal_get_cycles();
[438]	779	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	780	printk("\n[DBG] %s : thread %x in process %x exit for process %x in cluster %x / cycle %d\n",
	781	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy , cycle );
[433]	782	#endif
[407]	783
[440]	784	} // end process_delete_threads()
[409]	785
[440]	786	///////////////////////////////////////////////////
	787	void process_unblock_threads( process_t * process )
[409]	788	{
[440]	789	thread_t * target; // pointer on target thead
	790	thread_t * this; // pointer on calling thread
[409]	791	uint32_t ltid; // index in process th_tbl
[440]	792	uint32_t count; // requests counter
[409]	793
[440]	794	// get calling thread pointer
	795	this = CURRENT_THREAD;
	796
[438]	797	#if DEBUG_PROCESS_SIGACTION
[564]	798	pid_t pid = process->pid;
[433]	799	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	800	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	801	printk("\n[DBG] %s : thread %x in process %x enter for process %x in cluster %x / cycle %d\n",
	802	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy , cycle );
[433]	803	#endif
	804
[564]	805	// check target process is an user process
	806	assert( ( process->pid != 0 ),
	807	"target process must be an user process" );
	808
[416]	809	// get lock protecting process th_tbl[]
[564]	810	rwlock_rd_acquire( &process->th_lock );
[416]	811
[440]	812	// loop on process threads to unblock all threads
[416]	813	// we use both "ltid" and "count" because it can exist "holes" in th_tbl
[440]	814	for( ltid = 0 , count = 0 ; count < process->th_nr ; ltid++ )
[409]	815	{
[416]	816	target = process->th_tbl[ltid];
[409]	817
[440]	818	if( target != NULL ) // thread found
[409]	819	{
	820	count++;
[440]	821
	822	// reset the global blocked bit in target thread descriptor.
	823	thread_unblock( XPTR( local_cxy , target ) , THREAD_BLOCKED_GLOBAL );
[1]	824	}
	825	}
	826
[428]	827	// release lock protecting process th_tbl[]
[564]	828	rwlock_rd_release( &process->th_lock );
[407]	829
[438]	830	#if DEBUG_PROCESS_SIGACTION
[433]	831	cycle = (uint32_t)hal_get_cycles();
[438]	832	if( DEBUG_PROCESS_SIGACTION < cycle )
[564]	833	printk("\n[DBG] %s : thread %x in process %x exit for process %x in cluster %x / cycle %d\n",
	834	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy, cycle );
[433]	835	#endif
[1]	836
[440]	837	} // end process_unblock_threads()
[407]	838
[1]	839	///////////////////////////////////////////////
	840	process_t * process_get_local_copy( pid_t pid )
	841	{
	842	error_t error;
[172]	843	process_t * process_ptr; // local pointer on process
[23]	844	xptr_t process_xp; // extended pointer on process
[1]	845
	846	cluster_t * cluster = LOCAL_CLUSTER;
	847
[564]	848	#if DEBUG_PROCESS_GET_LOCAL_COPY
	849	thread_t * this = CURRENT_THREAD;
	850	uint32_t cycle = (uint32_t)hal_get_cycles();
	851	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
	852	printk("\n[DBG] %s : thread %x in cluster %x enter for process %x in cluster %x / cycle %d\n",
	853	__FUNCTION__, this->trdid, this->process->pid, pid, local_cxy, cycle );
	854	#endif
	855
[1]	856	// get lock protecting local list of processes
[564]	857	remote_queuelock_acquire( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
[1]	858
	859	// scan the local list of process descriptors to find the process
[23]	860	xptr_t iter;
	861	bool_t found = false;
	862	XLIST_FOREACH( XPTR( local_cxy , &cluster->pmgr.local_root ) , iter )
[1]	863	{
[23]	864	process_xp = XLIST_ELEMENT( iter , process_t , local_list );
[435]	865	process_ptr = GET_PTR( process_xp );
[23]	866	if( process_ptr->pid == pid )
[1]	867	{
	868	found = true;
	869	break;
	870	}
	871	}
	872
	873	// release lock protecting local list of processes
[564]	874	remote_queuelock_release( XPTR( local_cxy , &cluster->pmgr.local_lock ) );
[1]	875
[172]	876	// allocate memory for a new local process descriptor
[440]	877	// and initialise it from reference cluster if not found
[1]	878	if( !found )
	879	{
	880	// get extended pointer on reference process descriptor
[23]	881	xptr_t ref_xp = cluster_get_reference_process_from_pid( pid );
[1]	882
[492]	883	assert( (ref_xp != XPTR_NULL) , "illegal pid\n" );
[23]	884
[1]	885	// allocate memory for local process descriptor
[23]	886	process_ptr = process_alloc();
[443]	887
[23]	888	if( process_ptr == NULL ) return NULL;
[1]	889
	890	// initialize local process descriptor copy
[23]	891	error = process_copy_init( process_ptr , ref_xp );
[443]	892
[1]	893	if( error ) return NULL;
	894	}
	895
[440]	896	#if DEBUG_PROCESS_GET_LOCAL_COPY
[564]	897	cycle = (uint32_t)hal_get_cycles();
[440]	898	if( DEBUG_PROCESS_GET_LOCAL_COPY < cycle )
[564]	899	printk("\n[DBG] %s : thread %x in cluster %x exit in cluster %x / process %x / cycle %d\n",
	900	__FUNCTION__, this->trdid, this->process->pid, local_cxy, process_ptr, cycle );
[440]	901	#endif
	902
[23]	903	return process_ptr;
[1]	904
[409]	905	} // end process_get_local_copy()
	906
[436]	907	////////////////////////////////////////////
	908	pid_t process_get_ppid( xptr_t process_xp )
	909	{
	910	cxy_t process_cxy;
	911	process_t * process_ptr;
	912	xptr_t parent_xp;
	913	cxy_t parent_cxy;
	914	process_t * parent_ptr;
	915
	916	// get process cluster and local pointer
	917	process_cxy = GET_CXY( process_xp );
	918	process_ptr = GET_PTR( process_xp );
	919
	920	// get pointers on parent process
[564]	921	parent_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
[436]	922	parent_cxy = GET_CXY( parent_xp );
	923	parent_ptr = GET_PTR( parent_xp );
	924
[564]	925	return hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
[436]	926	}
	927
[1]	928	//////////////////////////////////////////////////////////////////////////////////////////
	929	// File descriptor array related functions
	930	//////////////////////////////////////////////////////////////////////////////////////////
	931
	932	///////////////////////////////////////////
	933	void process_fd_init( process_t * process )
	934	{
	935	uint32_t fd;
	936
[564]	937	remote_queuelock_init( XPTR( local_cxy , &process->fd_array.lock ), LOCK_PROCESS_FDARRAY );
[1]	938
[23]	939	process->fd_array.current = 0;
	940
[1]	941	// initialize array
[23]	942	for ( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
[1]	943	{
	944	process->fd_array.array[fd] = XPTR_NULL;
	945	}
	946	}
	947	/////////////////////////////////////////////////
[407]	948	error_t process_fd_register( process_t * process,
	949	xptr_t file_xp,
	950	uint32_t * fdid )
[1]	951	{
	952	bool_t found;
[23]	953	uint32_t id;
[564]	954	uint32_t count;
[23]	955	xptr_t xp;
[1]	956
[23]	957	// get reference process cluster and local pointer
[407]	958	xptr_t ref_xp = process->ref_xp;
[435]	959	process_t * ref_ptr = GET_PTR( ref_xp );
[23]	960	cxy_t ref_cxy = GET_CXY( ref_xp );
	961
	962	// take lock protecting reference fd_array
[564]	963	remote_queuelock_acquire( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) );
[23]	964
[1]	965	found = false;
	966
[23]	967	for ( id = 0; id < CONFIG_PROCESS_FILE_MAX_NR ; id++ )
[1]	968	{
[564]	969	xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) );
[23]	970	if ( xp == XPTR_NULL )
[1]	971	{
[564]	972	// update reference fd_array
	973	hal_remote_s64( XPTR( ref_cxy , &ref_ptr->fd_array.array[id] ) , file_xp );
	974	count = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) ) + 1;
	975	hal_remote_s32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) , count );
	976
	977	// update local fd_array copy if required
	978	if( ref_cxy != local_cxy )
	979	{
	980	process->fd_array.array[id] = file_xp;
	981	process->fd_array.current = count;
	982	}
	983
	984	// exit
	985	*fdid = id;
[1]	986	found = true;
	987	break;
	988	}
	989	}
	990
[23]	991	// release lock protecting reference fd_array
[564]	992	remote_queuelock_release( XPTR( ref_cxy , &ref_ptr->fd_array.lock ) );
[1]	993
[428]	994	if ( !found ) return -1;
[1]	995	else return 0;
[172]	996	}
[1]	997
[172]	998	////////////////////////////////////////////////
[23]	999	xptr_t process_fd_get_xptr( process_t * process,
[407]	1000	uint32_t fdid )
[1]	1001	{
[23]	1002	xptr_t file_xp;
[564]	1003	xptr_t lock_xp;
[1]	1004
[23]	1005	// access local copy of process descriptor
[407]	1006	file_xp = process->fd_array.array[fdid];
[1]	1007
[23]	1008	if( file_xp == XPTR_NULL )
	1009	{
	1010	// get reference process cluster and local pointer
	1011	xptr_t ref_xp = process->ref_xp;
	1012	cxy_t ref_cxy = GET_CXY( ref_xp );
[435]	1013	process_t * ref_ptr = GET_PTR( ref_xp );
[1]	1014
[564]	1015	// build extended pointer on lock protecting reference fd_array
	1016	lock_xp = XPTR( ref_cxy , &ref_ptr->fd_array.lock );
	1017
	1018	// take lock protecting reference fd_array
	1019	remote_queuelock_acquire( lock_xp );
	1020
[23]	1021	// access reference process descriptor
[564]	1022	file_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->fd_array.array[fdid] ) );
[1]	1023
[23]	1024	// update local fd_array if found
[564]	1025	if( file_xp != XPTR_NULL ) process->fd_array.array[fdid] = file_xp;
	1026
	1027	// release lock protecting reference fd_array
	1028	remote_queuelock_release( lock_xp );
[23]	1029	}
[1]	1030
[23]	1031	return file_xp;
[1]	1032
[407]	1033	} // end process_fd_get_xptr()
	1034
[1]	1035	///////////////////////////////////////////
	1036	void process_fd_remote_copy( xptr_t dst_xp,
	1037	xptr_t src_xp )
	1038	{
	1039	uint32_t fd;
	1040	xptr_t entry;
	1041
	1042	// get cluster and local pointer for src fd_array
	1043	cxy_t src_cxy = GET_CXY( src_xp );
[435]	1044	fd_array_t * src_ptr = GET_PTR( src_xp );
[1]	1045
	1046	// get cluster and local pointer for dst fd_array
	1047	cxy_t dst_cxy = GET_CXY( dst_xp );
[435]	1048	fd_array_t * dst_ptr = GET_PTR( dst_xp );
[1]	1049
	1050	// get the remote lock protecting the src fd_array
[564]	1051	remote_queuelock_acquire( XPTR( src_cxy , &src_ptr->lock ) );
[1]	1052
[428]	1053	// loop on all fd_array entries
	1054	for( fd = 0 ; fd < CONFIG_PROCESS_FILE_MAX_NR ; fd++ )
[1]	1055	{
[564]	1056	entry = (xptr_t)hal_remote_l64( XPTR( src_cxy , &src_ptr->array[fd] ) );
[1]	1057
	1058	if( entry != XPTR_NULL )
	1059	{
[459]	1060	// increment file descriptor refcount
[1]	1061	vfs_file_count_up( entry );
	1062
	1063	// copy entry in destination process fd_array
[564]	1064	hal_remote_s64( XPTR( dst_cxy , &dst_ptr->array[fd] ) , entry );
[1]	1065	}
	1066	}
	1067
	1068	// release lock on source process fd_array
[564]	1069	remote_queuelock_release( XPTR( src_cxy , &src_ptr->lock ) );
[1]	1070
[407]	1071	} // end process_fd_remote_copy()
	1072
[564]	1073
	1074	////////////////////////////////////
	1075	bool_t process_fd_array_full( void )
	1076	{
	1077	// get extended pointer on reference process
	1078	xptr_t ref_xp = CURRENT_THREAD->process->ref_xp;
	1079
	1080	// get reference process cluster and local pointer
	1081	process_t * ref_ptr = GET_PTR( ref_xp );
	1082	cxy_t ref_cxy = GET_CXY( ref_xp );
	1083
	1084	// get number of open file descriptors from reference fd_array
	1085	uint32_t current = hal_remote_l32( XPTR( ref_cxy , &ref_ptr->fd_array.current ) );
	1086
	1087	return ( current >= CONFIG_PROCESS_FILE_MAX_NR );
	1088	}
	1089
	1090
[1]	1091	////////////////////////////////////////////////////////////////////////////////////
	1092	// Thread related functions
	1093	////////////////////////////////////////////////////////////////////////////////////
	1094
	1095	/////////////////////////////////////////////////////
	1096	error_t process_register_thread( process_t * process,
	1097	thread_t * thread,
	1098	trdid_t * trdid )
	1099	{
[472]	1100	ltid_t ltid;
	1101	bool_t found = false;
	1102
[564]	1103	// check arguments
	1104	assert( (process != NULL) , "process argument is NULL" );
	1105	assert( (thread != NULL) , "thread argument is NULL" );
[1]	1106
[564]	1107	// get the lock protecting th_tbl for all threads
	1108	// but the idle thread executing kernel_init (cannot yield)
	1109	if( thread->type != THREAD_IDLE ) rwlock_wr_acquire( &process->th_lock );
[1]	1110
[564]	1111	// scan kth_tbl
	1112	for( ltid = 0 ; ltid < CONFIG_THREADS_MAX_PER_CLUSTER ; ltid++ )
[1]	1113	{
	1114	if( process->th_tbl[ltid] == NULL )
	1115	{
	1116	found = true;
	1117	break;
	1118	}
	1119	}
	1120
	1121	if( found )
	1122	{
	1123	// register thread in th_tbl[]
	1124	process->th_tbl[ltid] = thread;
	1125	process->th_nr++;
	1126
	1127	// returns trdid
	1128	*trdid = TRDID( local_cxy , ltid );
	1129	}
	1130
[564]	1131	// get the lock protecting th_tbl for all threads
	1132	// but the idle thread executing kernel_init (cannot yield)
	1133	if( thread->type != THREAD_IDLE ) rwlock_wr_release( &process->th_lock );
[428]	1134
[564]	1135	return (found) ? 0 : 0xFFFFFFFF;
[204]	1136
	1137	} // end process_register_thread()
	1138
[443]	1139	/////////////////////////////////////////////////
	1140	bool_t process_remove_thread( thread_t * thread )
[1]	1141	{
[443]	1142	uint32_t count; // number of threads in local process descriptor
	1143
[564]	1144	// check argument
	1145	assert( (thread != NULL) , "thread argument is NULL" );
[172]	1146
[1]	1147	process_t * process = thread->process;
	1148
	1149	// get thread local index
	1150	ltid_t ltid = LTID_FROM_TRDID( thread->trdid );
[564]	1151
	1152	// the lock depends on thread user/kernel type, because we cannot
	1153	// use a descheduling policy for the lock protecting the kth_tbl
[1]	1154
[564]	1155	// get the lock protecting th_tbl[]
	1156	rwlock_wr_acquire( &process->th_lock );
[428]	1157
[564]	1158	// get number of kernel threads
[443]	1159	count = process->th_nr;
[428]	1160
[564]	1161	// check th_nr value
	1162	assert( (count > 0) , "process kth_nr cannot be 0\n" );
[443]	1163
[1]	1164	// remove thread from th_tbl[]
	1165	process->th_tbl[ltid] = NULL;
[450]	1166	process->th_nr = count-1;
[1]	1167
[564]	1168	// release lock protecting kth_tbl
	1169	rwlock_wr_release( &process->th_lock );
[428]	1170
[443]	1171	return (count == 1);
	1172
[450]	1173	} // end process_remove_thread()
[204]	1174
[408]	1175	/////////////////////////////////////////////////////////
	1176	error_t process_make_fork( xptr_t parent_process_xp,
	1177	xptr_t parent_thread_xp,
	1178	pid_t * child_pid,
	1179	thread_t ** child_thread )
[1]	1180	{
[408]	1181	process_t * process; // local pointer on child process descriptor
	1182	thread_t * thread; // local pointer on child thread descriptor
	1183	pid_t new_pid; // process identifier for child process
	1184	pid_t parent_pid; // process identifier for parent process
	1185	xptr_t ref_xp; // extended pointer on reference process
[428]	1186	xptr_t vfs_bin_xp; // extended pointer on .elf file
[408]	1187	error_t error;
[1]	1188
[408]	1189	// get cluster and local pointer for parent process
	1190	cxy_t parent_process_cxy = GET_CXY( parent_process_xp );
[435]	1191	process_t * parent_process_ptr = GET_PTR( parent_process_xp );
[101]	1192
[428]	1193	// get parent process PID and extended pointer on .elf file
[564]	1194	parent_pid = hal_remote_l32 (XPTR( parent_process_cxy , &parent_process_ptr->pid));
	1195	vfs_bin_xp = hal_remote_l64(XPTR( parent_process_cxy , &parent_process_ptr->vfs_bin_xp));
[428]	1196
[564]	1197	// get extended pointer on reference process
	1198	ref_xp = hal_remote_l64( XPTR( parent_process_cxy , &parent_process_ptr->ref_xp ) );
[438]	1199
[564]	1200	// check parent process is the reference process
	1201	assert( (parent_process_xp == ref_xp ) ,
	1202	"parent process must be the reference process\n" );
[407]	1203
[438]	1204	#if DEBUG_PROCESS_MAKE_FORK
[433]	1205	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	1206	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[457]	1207	printk("\n[DBG] %s : thread %x in process %x enter / cluster %x / cycle %d\n",
	1208	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, local_cxy, cycle );
[433]	1209	#endif
[172]	1210
[408]	1211	// allocate a process descriptor
	1212	process = process_alloc();
	1213	if( process == NULL )
	1214	{
	1215	printk("\n[ERROR] in %s : cannot get process in cluster %x\n",
	1216	__FUNCTION__, local_cxy );
	1217	return -1;
	1218	}
[1]	1219
[408]	1220	// allocate a child PID from local cluster
[416]	1221	error = cluster_pid_alloc( process , &new_pid );
[428]	1222	if( error )
[1]	1223	{
[408]	1224	printk("\n[ERROR] in %s : cannot get PID in cluster %x\n",
	1225	__FUNCTION__, local_cxy );
	1226	process_free( process );
	1227	return -1;
[1]	1228	}
[408]	1229
[469]	1230	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
[457]	1231	cycle = (uint32_t)hal_get_cycles();
	1232	if( DEBUG_PROCESS_MAKE_FORK < cycle )
	1233	printk("\n[DBG] %s : thread %x in process %x allocated process %x / cycle %d\n",
	1234	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle );
	1235	#endif
	1236
[408]	1237	// initializes child process descriptor from parent process descriptor
	1238	process_reference_init( process,
	1239	new_pid,
	1240	parent_process_xp );
	1241
[438]	1242	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
[433]	1243	cycle = (uint32_t)hal_get_cycles();
[438]	1244	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[457]	1245	printk("\n[DBG] %s : thread %x in process %x initialized child_process %x / cycle %d\n",
	1246	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle );
[433]	1247	#endif
[408]	1248
[457]	1249
[408]	1250	// copy VMM from parent descriptor to child descriptor
	1251	error = vmm_fork_copy( process,
	1252	parent_process_xp );
	1253	if( error )
[101]	1254	{
[408]	1255	printk("\n[ERROR] in %s : cannot copy VMM in cluster %x\n",
	1256	__FUNCTION__, local_cxy );
	1257	process_free( process );
	1258	cluster_pid_release( new_pid );
	1259	return -1;
[101]	1260	}
[172]	1261
[438]	1262	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
[433]	1263	cycle = (uint32_t)hal_get_cycles();
[438]	1264	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[457]	1265	printk("\n[DBG] %s : thread %x in process %x copied VMM from parent %x to child %x / cycle %d\n",
	1266	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid,
	1267	parent_pid, new_pid, cycle );
[433]	1268	#endif
[407]	1269
[564]	1270	// if parent_process is INIT, or if parent_process is the TXT owner,
	1271	// the child_process becomes the owner of its TXT terminal
	1272	if( (parent_pid == 1) \|\| process_txt_is_owner( parent_process_xp ) )
[457]	1273	{
	1274	process_txt_set_ownership( XPTR( local_cxy , process ) );
	1275
	1276	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
	1277	cycle = (uint32_t)hal_get_cycles();
	1278	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[564]	1279	printk("\n[DBG] %s : thread %x in process %x / child takes TXT ownership / cycle %d\n",
	1280	__FUNCTION__ , CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle );
[457]	1281	#endif
	1282
	1283	}
	1284
[428]	1285	// update extended pointer on .elf file
	1286	process->vfs_bin_xp = vfs_bin_xp;
	1287
[408]	1288	// create child thread descriptor from parent thread descriptor
	1289	error = thread_user_fork( parent_thread_xp,
	1290	process,
	1291	&thread );
	1292	if( error )
	1293	{
	1294	printk("\n[ERROR] in %s : cannot create thread in cluster %x\n",
	1295	__FUNCTION__, local_cxy );
	1296	process_free( process );
	1297	cluster_pid_release( new_pid );
	1298	return -1;
	1299	}
[172]	1300
[564]	1301	// check main thread LTID
	1302	assert( (LTID_FROM_TRDID(thread->trdid) == 0) ,
	1303	"main thread must have LTID == 0\n" );
[428]	1304
[564]	1305	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
[433]	1306	cycle = (uint32_t)hal_get_cycles();
[438]	1307	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[469]	1308	printk("\n[DBG] %s : thread %x in process %x created main thread %x / cycle %d\n",
	1309	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, thread, cycle );
[433]	1310	#endif
[1]	1311
[433]	1312	// set Copy_On_Write flag in parent process GPT
[408]	1313	// this includes all replicated GPT copies
	1314	if( parent_process_cxy == local_cxy ) // reference is local
	1315	{
	1316	vmm_set_cow( parent_process_ptr );
	1317	}
	1318	else // reference is remote
	1319	{
	1320	rpc_vmm_set_cow_client( parent_process_cxy,
	1321	parent_process_ptr );
	1322	}
[1]	1323
[433]	1324	// set Copy_On_Write flag in child process GPT
	1325	vmm_set_cow( process );
	1326
[438]	1327	#if( DEBUG_PROCESS_MAKE_FORK & 1 )
[433]	1328	cycle = (uint32_t)hal_get_cycles();
[438]	1329	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[457]	1330	printk("\n[DBG] %s : thread %x in process %x set COW in parent and child / cycle %d\n",
	1331	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle );
[433]	1332	#endif
[101]	1333
[428]	1334	// get extended pointers on parent children_root, children_lock and children_nr
	1335	xptr_t children_root_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_root );
	1336	xptr_t children_lock_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_lock );
	1337	xptr_t children_nr_xp = XPTR( parent_process_cxy , &parent_process_ptr->children_nr );
[101]	1338
[428]	1339	// register process in parent children list
[564]	1340	remote_queuelock_acquire( children_lock_xp );
[428]	1341	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
	1342	hal_remote_atomic_add( children_nr_xp , 1 );
[564]	1343	remote_queuelock_release( children_lock_xp );
[204]	1344
[408]	1345	// return success
	1346	*child_thread = thread;
	1347	*child_pid = new_pid;
[1]	1348
[438]	1349	#if DEBUG_PROCESS_MAKE_FORK
[433]	1350	cycle = (uint32_t)hal_get_cycles();
[438]	1351	if( DEBUG_PROCESS_MAKE_FORK < cycle )
[457]	1352	printk("\n[DBG] %s : thread %x in process %x exit / created process %x / cycle %d\n",
	1353	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, new_pid, cycle );
[433]	1354	#endif
[428]	1355
[408]	1356	return 0;
	1357
[416]	1358	} // end process_make_fork()
[408]	1359
	1360	/////////////////////////////////////////////////////
	1361	error_t process_make_exec( exec_info_t * exec_info )
	1362	{
[457]	1363	thread_t * thread; // local pointer on this thread
	1364	process_t * process; // local pointer on this process
	1365	pid_t pid; // this process identifier
[441]	1366	error_t error; // value returned by called functions
[457]	1367	char * path; // path to .elf file
	1368	xptr_t file_xp; // extended pointer on .elf file descriptor
	1369	uint32_t file_id; // file index in fd_array
	1370	uint32_t args_nr; // number of main thread arguments
	1371	char ** args_pointers; // array of pointers on main thread arguments
[446]	1372
[457]	1373	// get thread, process & PID
	1374	thread = CURRENT_THREAD;
	1375	process = thread->process;
	1376	pid = process->pid;
[408]	1377
[457]	1378	// get relevant infos from exec_info
	1379	path = exec_info->path;
	1380	args_nr = exec_info->args_nr;
	1381	args_pointers = exec_info->args_pointers;
[408]	1382
[438]	1383	#if DEBUG_PROCESS_MAKE_EXEC
[433]	1384	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	1385	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[446]	1386	printk("\n[DBG] %s : thread %x in process %x enters / path %s / cycle %d\n",
[457]	1387	__FUNCTION__, thread->trdid, pid, path, cycle );
[433]	1388	#endif
[408]	1389
[457]	1390	// open the file identified by <path>
	1391	file_xp = XPTR_NULL;
[564]	1392	file_id = 0xFFFFFFFF;
[457]	1393	error = vfs_open( process,
	1394	path,
	1395	O_RDONLY,
	1396	0,
	1397	&file_xp,
	1398	&file_id );
	1399	if( error )
	1400	{
	1401	printk("\n[ERROR] in %s : failed to open file <%s>\n", __FUNCTION__ , path );
	1402	return -1;
	1403	}
	1404
[446]	1405	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
[469]	1406	cycle = (uint32_t)hal_get_cycles();
[446]	1407	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[469]	1408	printk("\n[DBG] %s : thread %x in process %x opened file <%s> / cycle %d\n",
	1409	__FUNCTION__, thread->trdid, pid, path, cycle );
[446]	1410	#endif
	1411
[457]	1412	// delete all threads other than this main thread in all clusters
	1413	process_sigaction( pid , DELETE_ALL_THREADS );
[446]	1414
[469]	1415	#if (DEBUG_PROCESS_MAKE_EXEC & 1)
	1416	cycle = (uint32_t)hal_get_cycles();
	1417	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
	1418	printk("\n[DBG] %s : thread %x in process %x deleted all threads / cycle %d\n",
	1419	__FUNCTION__, thread->trdid, pid, cycle );
	1420	#endif
	1421
[457]	1422	// reset local process VMM
	1423	vmm_destroy( process );
[446]	1424
[457]	1425	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
	1426	cycle = (uint32_t)hal_get_cycles();
	1427	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[469]	1428	printk("\n[DBG] %s : thread %x in process %x reset VMM / cycle %d\n",
[457]	1429	__FUNCTION__, thread->trdid, pid, cycle );
	1430	#endif
[408]	1431
[457]	1432	// re-initialize the VMM (kentry/args/envs vsegs registration)
	1433	error = vmm_init( process );
	1434	if( error )
[416]	1435	{
[457]	1436	printk("\n[ERROR] in %s : cannot initialise VMM for %s\n", __FUNCTION__ , path );
	1437	vfs_close( file_xp , file_id );
	1438	// FIXME restore old process VMM
[416]	1439	return -1;
	1440	}
[457]	1441
[438]	1442	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
[433]	1443	cycle = (uint32_t)hal_get_cycles();
[438]	1444	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[457]	1445	printk("\n[DBG] %s : thread %x in process %x / kentry/args/envs vsegs registered / cycle %d\n",
	1446	__FUNCTION__, thread->trdid, pid, cycle );
[433]	1447	#endif
[428]	1448
[457]	1449	// register code & data vsegs as well as entry-point in process VMM,
[428]	1450	// and register extended pointer on .elf file in process descriptor
[457]	1451	error = elf_load_process( file_xp , process );
[441]	1452	if( error )
[1]	1453	{
[441]	1454	printk("\n[ERROR] in %s : failed to access <%s>\n", __FUNCTION__ , path );
[457]	1455	vfs_close( file_xp , file_id );
	1456	// FIXME restore old process VMM
[408]	1457	return -1;
[1]	1458	}
	1459
[438]	1460	#if( DEBUG_PROCESS_MAKE_EXEC & 1 )
[433]	1461	cycle = (uint32_t)hal_get_cycles();
[438]	1462	if( DEBUG_PROCESS_MAKE_EXEC < cycle )
[457]	1463	printk("\n[DBG] %s : thread %x in process %x / code/data vsegs registered / cycle %d\n",
	1464	__FUNCTION__, thread->trdid, pid, cycle );
[433]	1465	#endif
[1]	1466
[457]	1467	// update the existing main thread descriptor... and jump to user code
	1468	error = thread_user_exec( (void *)process->vmm.entry_point,
	1469	args_nr,
	1470	args_pointers );
	1471	if( error )
	1472	{
[469]	1473	printk("\n[ERROR] in %s : cannot update main thread for %s\n", __FUNCTION__ , path );
[457]	1474	vfs_close( file_xp , file_id );
	1475	// FIXME restore old process VMM
[408]	1476	return -1;
[457]	1477	}
[1]	1478
[492]	1479	assert( false, "we should not execute this code");
[457]	1480
[409]	1481	return 0;
	1482
	1483	} // end process_make_exec()
	1484
[457]	1485
[428]	1486	///////////////////////////////////////////////
	1487	void process_zero_create( process_t * process )
	1488	{
	1489
[438]	1490	#if DEBUG_PROCESS_ZERO_CREATE
[433]	1491	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	1492	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
[564]	1493	printk("\n[DBG] %s : enter / cluster %x / cycle %d\n",
	1494	__FUNCTION__, local_cxy, cycle );
[433]	1495	#endif
[428]	1496
	1497	// initialize PID, REF_XP, PARENT_XP, and STATE
[433]	1498	process->pid = 0;
	1499	process->ref_xp = XPTR( local_cxy , process );
[443]	1500	process->owner_xp = XPTR( local_cxy , process );
[433]	1501	process->parent_xp = XPTR_NULL;
	1502	process->term_state = 0;
[428]	1503
[564]	1504	// reset th_tbl[] array and associated fields
[428]	1505	uint32_t i;
[564]	1506	for( i = 0 ; i < CONFIG_THREADS_MAX_PER_CLUSTER ; i++ )
[428]	1507	{
	1508	process->th_tbl[i] = NULL;
	1509	}
	1510	process->th_nr = 0;
[564]	1511	rwlock_init( &process->th_lock , LOCK_PROCESS_THTBL );
[428]	1512
[564]	1513
[428]	1514	// reset children list as empty
	1515	xlist_root_init( XPTR( local_cxy , &process->children_root ) );
	1516	process->children_nr = 0;
[564]	1517	remote_queuelock_init( XPTR( local_cxy , &process->children_lock ),
	1518	LOCK_PROCESS_CHILDREN );
[428]	1519
	1520	hal_fence();
	1521
[438]	1522	#if DEBUG_PROCESS_ZERO_CREATE
[433]	1523	cycle = (uint32_t)hal_get_cycles();
[438]	1524	if( DEBUG_PROCESS_ZERO_CREATE < cycle )
[564]	1525	printk("\n[DBG] %s : exit / cluster %x / cycle %d\n",
	1526	__FUNCTION__, local_cxy, cycle );
[433]	1527	#endif
[428]	1528
	1529	} // end process_zero_init()
	1530
[564]	1531	////////////////////////////////
[485]	1532	void process_init_create( void )
[1]	1533	{
[428]	1534	process_t * process; // local pointer on process descriptor
[409]	1535	pid_t pid; // process_init identifier
	1536	thread_t * thread; // local pointer on main thread
	1537	pthread_attr_t attr; // main thread attributes
	1538	lid_t lid; // selected core local index for main thread
[457]	1539	xptr_t file_xp; // extended pointer on .elf file descriptor
	1540	uint32_t file_id; // file index in fd_array
[409]	1541	error_t error;
[1]	1542
[438]	1543	#if DEBUG_PROCESS_INIT_CREATE
[433]	1544	uint32_t cycle = (uint32_t)hal_get_cycles();
[438]	1545	if( DEBUG_PROCESS_INIT_CREATE < cycle )
[457]	1546	printk("\n[DBG] %s : thread %x in process %x enter / cycle %d\n",
	1547	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle );
[433]	1548	#endif
[1]	1549
[408]	1550	// allocates memory for process descriptor from local cluster
	1551	process = process_alloc();
[457]	1552
[564]	1553	// check memory allocator
	1554	assert( (process != NULL),
	1555	"no memory for process descriptor in cluster %x\n", local_cxy );
[101]	1556
[409]	1557	// get PID from local cluster
[416]	1558	error = cluster_pid_alloc( process , &pid );
[408]	1559
[564]	1560	// check PID allocator
	1561	assert( (error == 0),
	1562	"cannot allocate PID in cluster %x\n", local_cxy );
[409]	1563
[564]	1564	// check PID value
	1565	assert( (pid == 1) ,
	1566	"process INIT must be first process in cluster 0\n" );
[457]	1567
[409]	1568	// initialize process descriptor / parent is local process_zero
	1569	process_reference_init( process,
[408]	1570	pid,
[457]	1571	XPTR( local_cxy , &process_zero ) );
[408]	1572
[564]	1573	#if(DEBUG_PROCESS_INIT_CREATE & 1)
	1574	if( DEBUG_PROCESS_INIT_CREATE < cycle )
	1575	printk("\n[DBG] %s : thread %x in process %x initialized process descriptor\n",
	1576	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid );
	1577	#endif
	1578
[457]	1579	// open the file identified by CONFIG_PROCESS_INIT_PATH
	1580	file_xp = XPTR_NULL;
	1581	file_id = -1;
	1582	error = vfs_open( process,
	1583	CONFIG_PROCESS_INIT_PATH,
	1584	O_RDONLY,
	1585	0,
	1586	&file_xp,
	1587	&file_id );
	1588
[564]	1589	assert( (error == 0),
	1590	"failed to open file <%s>\n", CONFIG_PROCESS_INIT_PATH );
[457]	1591
[564]	1592	#if(DEBUG_PROCESS_INIT_CREATE & 1)
	1593	if( DEBUG_PROCESS_INIT_CREATE < cycle )
	1594	printk("\n[DBG] %s : thread %x in process %x open .elf file decriptor\n",
	1595	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid );
	1596	#endif
	1597
	1598	// register "code" and "data" vsegs as well as entry-point
[409]	1599	// in process VMM, using information contained in the elf file.
[457]	1600	error = elf_load_process( file_xp , process );
[101]	1601
[564]	1602	assert( (error == 0),
	1603	"cannot access .elf file <%s>\n", CONFIG_PROCESS_INIT_PATH );
[457]	1604
[564]	1605	#if(DEBUG_PROCESS_INIT_CREATE & 1)
	1606	if( DEBUG_PROCESS_INIT_CREATE < cycle )
	1607	printk("\n[DBG] %s : thread %x in process %x registered code/data vsegs in VMM\n",
	1608	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid );
	1609	#endif
	1610
[428]	1611	// get extended pointers on process_zero children_root, children_lock
	1612	xptr_t children_root_xp = XPTR( local_cxy , &process_zero.children_root );
	1613	xptr_t children_lock_xp = XPTR( local_cxy , &process_zero.children_lock );
	1614
[564]	1615	// take lock protecting kernel process children list
	1616	remote_queuelock_acquire( children_lock_xp );
	1617
[428]	1618	// register process INIT in parent local process_zero
	1619	xlist_add_last( children_root_xp , XPTR( local_cxy , &process->children_list ) );
	1620	hal_atomic_add( &process_zero.children_nr , 1 );
	1621
[564]	1622	// release lock protecting kernel process children list
	1623	remote_queuelock_release( children_lock_xp );
	1624
	1625	#if(DEBUG_PROCESS_INIT_CREATE & 1)
	1626	if( DEBUG_PROCESS_INIT_CREATE < cycle )
	1627	printk("\n[DBG] %s : thread %x in process %x registered init process in parent\n",
	1628	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid );
	1629	#endif
	1630
[409]	1631	// select a core in local cluster to execute the main thread
	1632	lid = cluster_select_local_core();
	1633
	1634	// initialize pthread attributes for main thread
	1635	attr.attributes = PT_ATTR_DETACH \| PT_ATTR_CLUSTER_DEFINED \| PT_ATTR_CORE_DEFINED;
	1636	attr.cxy = local_cxy;
	1637	attr.lid = lid;
	1638
	1639	// create and initialize thread descriptor
	1640	error = thread_user_create( pid,
	1641	(void *)process->vmm.entry_point,
	1642	NULL,
	1643	&attr,
	1644	&thread );
[1]	1645
[564]	1646	assert( (error == 0),
	1647	"cannot create main thread for <%s>\n", CONFIG_PROCESS_INIT_PATH );
[428]	1648
[564]	1649	assert( (thread->trdid == 0),
	1650	"main thread must have index 0 for <%s>\n", CONFIG_PROCESS_INIT_PATH );
[457]	1651
[564]	1652	#if(DEBUG_PROCESS_INIT_CREATE & 1)
	1653	if( DEBUG_PROCESS_INIT_CREATE < cycle )
	1654	printk("\n[DBG] %s : thread %x in process %x created main thread\n",
	1655	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid );
	1656	#endif
	1657
[409]	1658	// activate thread
	1659	thread_unblock( XPTR( local_cxy , thread ) , THREAD_BLOCKED_GLOBAL );
	1660
[124]	1661	hal_fence();
[1]	1662
[438]	1663	#if DEBUG_PROCESS_INIT_CREATE
[433]	1664	cycle = (uint32_t)hal_get_cycles();
[438]	1665	if( DEBUG_PROCESS_INIT_CREATE < cycle )
[457]	1666	printk("\n[DBG] %s : thread %x in process %x exit / cycle %d\n",
	1667	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, cycle );
[433]	1668	#endif
[409]	1669
[204]	1670	} // end process_init_create()
	1671
[428]	1672	/////////////////////////////////////////
	1673	void process_display( xptr_t process_xp )
	1674	{
	1675	process_t * process_ptr;
	1676	cxy_t process_cxy;
[443]	1677
[428]	1678	xptr_t parent_xp; // extended pointer on parent process
	1679	process_t * parent_ptr;
	1680	cxy_t parent_cxy;
	1681
[443]	1682	xptr_t owner_xp; // extended pointer on owner process
	1683	process_t * owner_ptr;
	1684	cxy_t owner_cxy;
	1685
[428]	1686	pid_t pid;
	1687	pid_t ppid;
	1688	uint32_t state;
	1689	uint32_t th_nr;
	1690
[443]	1691	xptr_t txt_file_xp; // extended pointer on TXT_RX file descriptor
	1692	xptr_t txt_chdev_xp; // extended pointer on TXT_RX chdev
	1693	chdev_t * txt_chdev_ptr;
	1694	cxy_t txt_chdev_cxy;
	1695	xptr_t txt_owner_xp; // extended pointer on TXT owner process
[428]	1696
	1697	xptr_t elf_file_xp; // extended pointer on .elf file
	1698	cxy_t elf_file_cxy;
	1699	vfs_file_t * elf_file_ptr;
	1700	vfs_inode_t * elf_inode_ptr; // local pointer on .elf inode
	1701
	1702	char txt_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1703	char elf_name[CONFIG_VFS_MAX_NAME_LENGTH];
	1704
	1705	// get cluster and local pointer on process
	1706	process_ptr = GET_PTR( process_xp );
	1707	process_cxy = GET_CXY( process_xp );
	1708
	1709	// get PID and state
[564]	1710	pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
	1711	state = hal_remote_l32( XPTR( process_cxy , &process_ptr->term_state ) );
[428]	1712
	1713	// get PPID
[564]	1714	parent_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->parent_xp ) );
[428]	1715	parent_cxy = GET_CXY( parent_xp );
	1716	parent_ptr = GET_PTR( parent_xp );
[564]	1717	ppid = hal_remote_l32( XPTR( parent_cxy , &parent_ptr->pid ) );
[428]	1718
	1719	// get number of threads
[564]	1720	th_nr = hal_remote_l32( XPTR( process_cxy , &process_ptr->th_nr ) );
[428]	1721
[443]	1722	// get pointers on owner process descriptor
[564]	1723	owner_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->owner_xp ) );
[443]	1724	owner_cxy = GET_CXY( owner_xp );
	1725	owner_ptr = GET_PTR( owner_xp );
[428]	1726
[443]	1727	// get extended pointer on TXT_RX file descriptor attached to process
[564]	1728	txt_file_xp = hal_remote_l64( XPTR( owner_cxy , &owner_ptr->fd_array.array[0] ) );
[443]	1729
[492]	1730	assert( (txt_file_xp != XPTR_NULL) ,
[428]	1731	"process must be attached to one TXT terminal\n" );
	1732
[443]	1733	// get TXT_RX chdev pointers
	1734	txt_chdev_xp = chdev_from_file( txt_file_xp );
	1735	txt_chdev_cxy = GET_CXY( txt_chdev_xp );
	1736	txt_chdev_ptr = GET_PTR( txt_chdev_xp );
	1737
	1738	// get TXT_RX name and ownership
[428]	1739	hal_remote_strcpy( XPTR( local_cxy , txt_name ) ,
[443]	1740	XPTR( txt_chdev_cxy , txt_chdev_ptr->name ) );
[428]	1741
[564]	1742	txt_owner_xp = (xptr_t)hal_remote_l64( XPTR( txt_chdev_cxy,
[443]	1743	&txt_chdev_ptr->ext.txt.owner_xp ) );
	1744
[428]	1745	// get process .elf name
[564]	1746	elf_file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->vfs_bin_xp ) );
[428]	1747	elf_file_cxy = GET_CXY( elf_file_xp );
	1748	elf_file_ptr = (vfs_file_t *)GET_PTR( elf_file_xp );
	1749	elf_inode_ptr = (vfs_inode_t *)hal_remote_lpt( XPTR( elf_file_cxy , &elf_file_ptr->inode ) );
	1750	vfs_inode_get_name( XPTR( elf_file_cxy , elf_inode_ptr ) , elf_name );
	1751
	1752	// display process info
[443]	1753	if( txt_owner_xp == process_xp )
[428]	1754	{
[446]	1755	nolock_printk("PID %X \| PPID %X \| TS %X \| %s (FG) \| %X \| %d \| %s\n",
[433]	1756	pid, ppid, state, txt_name, process_ptr, th_nr, elf_name );
[428]	1757	}
	1758	else
	1759	{
[446]	1760	nolock_printk("PID %X \| PPID %X \| TS %X \| %s (BG) \| %X \| %d \| %s\n",
[433]	1761	pid, ppid, state, txt_name, process_ptr, th_nr, elf_name );
[428]	1762	}
	1763	} // end process_display()
	1764
	1765
	1766	////////////////////////////////////////////////////////////////////////////////////////
	1767	// Terminals related functions
	1768	////////////////////////////////////////////////////////////////////////////////////////
	1769
	1770	////////////////////////////
[485]	1771	uint32_t process_txt_alloc( void )
[428]	1772	{
	1773	uint32_t index; // TXT terminal index
	1774	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
	1775	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
	1776	cxy_t chdev_cxy; // TXT_RX chdev cluster
	1777	xptr_t root_xp; // extended pointer on owner field in chdev
	1778
	1779	// scan the user TXT_RX chdevs (TXT0 is reserved for kernel)
	1780	for( index = 1 ; index < LOCAL_CLUSTER->nb_txt_channels ; index ++ )
	1781	{
	1782	// get pointers on TXT_RX[index]
	1783	chdev_xp = chdev_dir.txt_rx[index];
	1784	chdev_cxy = GET_CXY( chdev_xp );
	1785	chdev_ptr = GET_PTR( chdev_xp );
	1786
	1787	// get extended pointer on root of attached process
	1788	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
	1789
	1790	// return free TXT index if found
	1791	if( xlist_is_empty( root_xp ) ) return index;
	1792	}
	1793
[492]	1794	assert( false , "no free TXT terminal found" );
[428]	1795
	1796	return -1;
	1797
	1798	} // end process_txt_alloc()
	1799
	1800	/////////////////////////////////////////////
	1801	void process_txt_attach( process_t * process,
	1802	uint32_t txt_id )
	1803	{
	1804	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
	1805	cxy_t chdev_cxy; // TXT_RX chdev cluster
	1806	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
	1807	xptr_t root_xp; // extended pointer on list root in chdev
	1808	xptr_t lock_xp; // extended pointer on list lock in chdev
	1809
[564]	1810	// check process is in owner cluster
	1811	assert( (CXY_FROM_PID( process->pid ) == local_cxy) ,
	1812	"process descriptor not in owner cluster" );
[428]	1813
[564]	1814	// check terminal index
	1815	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
	1816	"illegal TXT terminal index" );
[428]	1817
	1818	// get pointers on TXT_RX[txt_id] chdev
	1819	chdev_xp = chdev_dir.txt_rx[txt_id];
	1820	chdev_cxy = GET_CXY( chdev_xp );
	1821	chdev_ptr = GET_PTR( chdev_xp );
	1822
	1823	// get extended pointer on root & lock of attached process list
	1824	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
	1825	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
	1826
[564]	1827	// get lock protecting list of processes attached to TXT
	1828	remote_busylock_acquire( lock_xp );
	1829
[428]	1830	// insert process in attached process list
	1831	xlist_add_last( root_xp , XPTR( local_cxy , &process->txt_list ) );
	1832
[564]	1833	// release lock protecting list of processes attached to TXT
	1834	remote_busylock_release( lock_xp );
	1835
[446]	1836	#if DEBUG_PROCESS_TXT
[457]	1837	uint32_t cycle = (uint32_t)hal_get_cycles();
[446]	1838	if( DEBUG_PROCESS_TXT < cycle )
[457]	1839	printk("\n[DBG] %s : thread %x in process %x attached process %x to TXT %d / cycle %d\n",
	1840	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid,
	1841	process->pid, txt_id , cycle );
[433]	1842	#endif
[428]	1843
	1844	} // end process_txt_attach()
	1845
[436]	1846	/////////////////////////////////////////////
	1847	void process_txt_detach( xptr_t process_xp )
[428]	1848	{
[436]	1849	process_t * process_ptr; // local pointer on process in owner cluster
	1850	cxy_t process_cxy; // process owner cluster
	1851	pid_t process_pid; // process identifier
	1852	xptr_t file_xp; // extended pointer on stdin file
[428]	1853	xptr_t chdev_xp; // extended pointer on TXT_RX chdev
	1854	cxy_t chdev_cxy; // TXT_RX chdev cluster
	1855	chdev_t * chdev_ptr; // local pointer on TXT_RX chdev
	1856	xptr_t lock_xp; // extended pointer on list lock in chdev
	1857
[436]	1858	// get process cluster, local pointer, and PID
	1859	process_cxy = GET_CXY( process_xp );
	1860	process_ptr = GET_PTR( process_xp );
[564]	1861	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
[436]	1862
[564]	1863	// check process descriptor in owner cluster
	1864	assert( (CXY_FROM_PID( process_pid ) == process_cxy ) ,
	1865	"process descriptor not in owner cluster" );
[436]	1866
	1867	// release TXT ownership (does nothing if not TXT owner)
	1868	process_txt_transfer_ownership( process_xp );
[428]	1869
[436]	1870	// get extended pointer on process stdin file
[564]	1871	file_xp = (xptr_t)hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
[436]	1872
	1873	// get pointers on TXT_RX chdev
	1874	chdev_xp = chdev_from_file( file_xp );
[428]	1875	chdev_cxy = GET_CXY( chdev_xp );
	1876	chdev_ptr = (chdev_t *)GET_PTR( chdev_xp );
	1877
[436]	1878	// get extended pointer on lock protecting attached process list
[428]	1879	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
	1880
[564]	1881	// get lock protecting list of processes attached to TXT
	1882	remote_busylock_acquire( lock_xp );
	1883
[428]	1884	// unlink process from attached process list
[436]	1885	xlist_unlink( XPTR( process_cxy , &process_ptr->txt_list ) );
	1886
[564]	1887	// release lock protecting list of processes attached to TXT
	1888	remote_busylock_release( lock_xp );
	1889
[446]	1890	#if DEBUG_PROCESS_TXT
[457]	1891	uint32_t cycle = (uint32_t)hal_get_cycles();
[564]	1892	uint32_t txt_id = hal_remote_l32( XPTR( chdev_cxy , &chdev_ptr->channel ) );
[446]	1893	if( DEBUG_PROCESS_TXT < cycle )
[457]	1894	printk("\n[DBG] %s : thread %x in process %x detached process %x from TXT %d / cycle %d\n",
	1895	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid,
	1896	process_pid, txt_id, cycle );
[433]	1897	#endif
[428]	1898
	1899	} // end process_txt_detach()
	1900
	1901	///////////////////////////////////////////////////
	1902	void process_txt_set_ownership( xptr_t process_xp )
	1903	{
	1904	process_t * process_ptr;
	1905	cxy_t process_cxy;
[436]	1906	pid_t process_pid;
[428]	1907	xptr_t file_xp;
	1908	xptr_t txt_xp;
	1909	chdev_t * txt_ptr;
	1910	cxy_t txt_cxy;
	1911
[436]	1912	// get pointers on process in owner cluster
[428]	1913	process_cxy = GET_CXY( process_xp );
[435]	1914	process_ptr = GET_PTR( process_xp );
[564]	1915	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
[436]	1916
	1917	// check owner cluster
[492]	1918	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
[436]	1919	"process descriptor not in owner cluster\n" );
	1920
[428]	1921	// get extended pointer on stdin pseudo file
[564]	1922	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
[428]	1923
	1924	// get pointers on TXT chdev
	1925	txt_xp = chdev_from_file( file_xp );
	1926	txt_cxy = GET_CXY( txt_xp );
[435]	1927	txt_ptr = GET_PTR( txt_xp );
[428]	1928
	1929	// set owner field in TXT chdev
[564]	1930	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , process_xp );
[428]	1931
[446]	1932	#if DEBUG_PROCESS_TXT
[457]	1933	uint32_t cycle = (uint32_t)hal_get_cycles();
[564]	1934	uint32_t txt_id = hal_remote_l32( XPTR( txt_cxy , &txt_ptr->channel ) );
[446]	1935	if( DEBUG_PROCESS_TXT < cycle )
[457]	1936	printk("\n[DBG] %s : thread %x in process %x give TXT %d to process %x / cycle %d\n",
	1937	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, process_pid, cycle );
[436]	1938	#endif
	1939
[428]	1940	} // end process_txt_set ownership()
	1941
[436]	1942	////////////////////////////////////////////////////////
	1943	void process_txt_transfer_ownership( xptr_t process_xp )
[428]	1944	{
[436]	1945	process_t * process_ptr; // local pointer on process releasing ownership
	1946	cxy_t process_cxy; // process cluster
	1947	pid_t process_pid; // process identifier
[428]	1948	xptr_t file_xp; // extended pointer on TXT_RX pseudo file
	1949	xptr_t txt_xp; // extended pointer on TXT_RX chdev
[433]	1950	chdev_t * txt_ptr; // local pointer on TXT_RX chdev
	1951	cxy_t txt_cxy; // cluster of TXT_RX chdev
	1952	uint32_t txt_id; // TXT_RX channel
[428]	1953	xptr_t owner_xp; // extended pointer on current TXT_RX owner
	1954	xptr_t root_xp; // extended pointer on root of attached process list
[436]	1955	xptr_t lock_xp; // extended pointer on lock protecting attached process list
[428]	1956	xptr_t iter_xp; // iterator for xlist
	1957	xptr_t current_xp; // extended pointer on current process
[433]	1958	process_t * current_ptr; // local pointer on current process
	1959	cxy_t current_cxy; // cluster for current process
[428]	1960
[457]	1961	#if DEBUG_PROCESS_TXT
	1962	uint32_t cycle;
	1963	#endif
	1964
[436]	1965	// get pointers on process in owner cluster
[428]	1966	process_cxy = GET_CXY( process_xp );
[435]	1967	process_ptr = GET_PTR( process_xp );
[564]	1968	process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
[436]	1969
	1970	// check owner cluster
[492]	1971	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
[436]	1972	"process descriptor not in owner cluster\n" );
	1973
[428]	1974	// get extended pointer on stdin pseudo file
[564]	1975	file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
[428]	1976
	1977	// get pointers on TXT chdev
	1978	txt_xp = chdev_from_file( file_xp );
	1979	txt_cxy = GET_CXY( txt_xp );
[433]	1980	txt_ptr = GET_PTR( txt_xp );
[428]	1981
[433]	1982	// get extended pointer on TXT_RX owner and TXT channel
[564]	1983	owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
	1984	txt_id = hal_remote_l32 ( XPTR( txt_cxy , &txt_ptr->channel ) );
[428]	1985
[436]	1986	// transfer ownership only if process is the TXT owner
	1987	if( (owner_xp == process_xp) && (txt_id > 0) )
[428]	1988	{
[436]	1989	// get extended pointers on root and lock of attached processes list
	1990	root_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.root );
	1991	lock_xp = XPTR( txt_cxy , &txt_ptr->ext.txt.lock );
[428]	1992
[436]	1993	// get lock
[564]	1994	remote_busylock_acquire( lock_xp );
[436]	1995
	1996	if( process_get_ppid( process_xp ) != 1 ) // process is not KSH
[428]	1997	{
[436]	1998	// scan attached process list to find KSH process
	1999	XLIST_FOREACH( root_xp , iter_xp )
	2000	{
	2001	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
	2002	current_cxy = GET_CXY( current_xp );
	2003	current_ptr = GET_PTR( current_xp );
[435]	2004
[436]	2005	if( process_get_ppid( current_xp ) == 1 ) // current is KSH
	2006	{
	2007	// release lock
[564]	2008	remote_busylock_release( lock_xp );
[436]	2009
	2010	// set owner field in TXT chdev
[564]	2011	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
[436]	2012
[446]	2013	#if DEBUG_PROCESS_TXT
[457]	2014	cycle = (uint32_t)hal_get_cycles();
[564]	2015	uint32_t ksh_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
[446]	2016	if( DEBUG_PROCESS_TXT < cycle )
[457]	2017	printk("\n[DBG] %s : thread %x in process %x release TXT %d to KSH %x / cycle %d\n",
	2018	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, ksh_pid, cycle );
	2019	process_txt_display( txt_id );
[436]	2020	#endif
	2021	return;
	2022	}
	2023	}
	2024
	2025	// release lock
[564]	2026	remote_busylock_release( lock_xp );
[436]	2027
	2028	// PANIC if KSH not found
[492]	2029	assert( false , "KSH process not found for TXT %d" );
[436]	2030
	2031	return;
	2032	}
	2033	else // process is KSH
	2034	{
	2035	// scan attached process list to find another process
	2036	XLIST_FOREACH( root_xp , iter_xp )
[428]	2037	{
[436]	2038	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
	2039	current_cxy = GET_CXY( current_xp );
	2040	current_ptr = GET_PTR( current_xp );
	2041
	2042	if( current_xp != process_xp ) // current is not KSH
	2043	{
	2044	// release lock
[564]	2045	remote_busylock_release( lock_xp );
[436]	2046
	2047	// set owner field in TXT chdev
[564]	2048	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , current_xp );
[436]	2049
[446]	2050	#if DEBUG_PROCESS_TXT
[457]	2051	cycle = (uint32_t)hal_get_cycles();
[564]	2052	uint32_t new_pid = hal_remote_l32( XPTR( current_cxy , &current_ptr->pid ) );
[446]	2053	if( DEBUG_PROCESS_TXT < cycle )
[457]	2054	printk("\n[DBG] %s : thread %x in process %x release TXT %d to process %x / cycle %d\n",
	2055	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, new_pid, cycle );
	2056	process_txt_display( txt_id );
[436]	2057	#endif
	2058	return;
	2059	}
[428]	2060	}
[436]	2061
	2062	// release lock
[564]	2063	remote_busylock_release( lock_xp );
[436]	2064
	2065	// no more owner for TXT if no other process found
[564]	2066	hal_remote_s64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) , XPTR_NULL );
[436]	2067
[446]	2068	#if DEBUG_PROCESS_TXT
[436]	2069	cycle = (uint32_t)hal_get_cycles();
[446]	2070	if( DEBUG_PROCESS_TXT < cycle )
[457]	2071	printk("\n[DBG] %s : thread %x in process %x release TXT %d to nobody / cycle %d\n",
	2072	__FUNCTION__, CURRENT_THREAD->trdid, CURRENT_THREAD->process->pid, txt_id, cycle );
	2073	process_txt_display( txt_id );
[436]	2074	#endif
	2075	return;
[428]	2076	}
[436]	2077	}
	2078	else
	2079	{
[433]	2080
[446]	2081	#if DEBUG_PROCESS_TXT
[436]	2082	cycle = (uint32_t)hal_get_cycles();
[446]	2083	if( DEBUG_PROCESS_TXT < cycle )
[457]	2084	printk("\n[DBG] %s : thread %x in process %d does nothing (not TXT owner) / cycle %d\n",
	2085	__FUNCTION__, CURRENT_THREAD->trdid, process_pid, cycle );
	2086	process_txt_display( txt_id );
[436]	2087	#endif
	2088
[428]	2089	}
[436]	2090	} // end process_txt_transfer_ownership()
[428]	2091
	2092
[564]	2093	////////////////////////////////////////////////
	2094	bool_t process_txt_is_owner( xptr_t process_xp )
[457]	2095	{
	2096	// get local pointer and cluster of process in owner cluster
	2097	cxy_t process_cxy = GET_CXY( process_xp );
	2098	process_t * process_ptr = GET_PTR( process_xp );
	2099
[564]	2100	// check calling thread execute in target process owner cluster
	2101	pid_t process_pid = hal_remote_l32( XPTR( process_cxy , &process_ptr->pid ) );
	2102	assert( (process_cxy == CXY_FROM_PID( process_pid )) ,
	2103	"process descriptor not in owner cluster\n" );
[457]	2104
	2105	// get extended pointer on stdin pseudo file
[564]	2106	xptr_t file_xp = hal_remote_l64( XPTR( process_cxy , &process_ptr->fd_array.array[0] ) );
[457]	2107
	2108	// get pointers on TXT chdev
	2109	xptr_t txt_xp = chdev_from_file( file_xp );
	2110	cxy_t txt_cxy = GET_CXY( txt_xp );
	2111	chdev_t * txt_ptr = GET_PTR( txt_xp );
	2112
	2113	// get extended pointer on TXT_RX owner process
[564]	2114	xptr_t owner_xp = hal_remote_l64( XPTR( txt_cxy , &txt_ptr->ext.txt.owner_xp ) );
[457]	2115
	2116	return (process_xp == owner_xp);
	2117
	2118	} // end process_txt_is_owner()
	2119
[436]	2120	////////////////////////////////////////////////
	2121	xptr_t process_txt_get_owner( uint32_t channel )
[435]	2122	{
	2123	xptr_t txt_rx_xp = chdev_dir.txt_rx[channel];
	2124	cxy_t txt_rx_cxy = GET_CXY( txt_rx_xp );
	2125	chdev_t * txt_rx_ptr = GET_PTR( txt_rx_xp );
	2126
[564]	2127	return (xptr_t)hal_remote_l64( XPTR( txt_rx_cxy , &txt_rx_ptr->ext.txt.owner_xp ) );
[435]	2128
[457]	2129	} // end process_txt_get_owner()
	2130
[435]	2131	///////////////////////////////////////////
	2132	void process_txt_display( uint32_t txt_id )
	2133	{
	2134	xptr_t chdev_xp;
	2135	cxy_t chdev_cxy;
	2136	chdev_t * chdev_ptr;
	2137	xptr_t root_xp;
	2138	xptr_t lock_xp;
	2139	xptr_t current_xp;
	2140	xptr_t iter_xp;
[443]	2141	cxy_t txt0_cxy;
	2142	chdev_t * txt0_ptr;
	2143	xptr_t txt0_xp;
	2144	xptr_t txt0_lock_xp;
	2145
[435]	2146	assert( (txt_id < LOCAL_CLUSTER->nb_txt_channels) ,
[492]	2147	"illegal TXT terminal index" );
[435]	2148
[443]	2149	// get pointers on TXT0 chdev
	2150	txt0_xp = chdev_dir.txt_tx[0];
	2151	txt0_cxy = GET_CXY( txt0_xp );
	2152	txt0_ptr = GET_PTR( txt0_xp );
	2153
	2154	// get extended pointer on TXT0 lock
	2155	txt0_lock_xp = XPTR( txt0_cxy , &txt0_ptr->wait_lock );
	2156
[435]	2157	// get pointers on TXT_RX[txt_id] chdev
	2158	chdev_xp = chdev_dir.txt_rx[txt_id];
	2159	chdev_cxy = GET_CXY( chdev_xp );
	2160	chdev_ptr = GET_PTR( chdev_xp );
	2161
	2162	// get extended pointer on root & lock of attached process list
	2163	root_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.root );
	2164	lock_xp = XPTR( chdev_cxy , &chdev_ptr->ext.txt.lock );
	2165
[443]	2166	// get lock on attached process list
[564]	2167	remote_busylock_acquire( lock_xp );
[443]	2168
	2169	// get TXT0 lock in busy waiting mode
[564]	2170	remote_busylock_acquire( txt0_lock_xp );
[443]	2171
[435]	2172	// display header
[443]	2173	nolock_printk("\n***** processes attached to TXT_%d / cycle %d\n",
	2174	txt_id , (uint32_t)hal_get_cycles() );
[435]	2175
[436]	2176	// scan attached process list
[435]	2177	XLIST_FOREACH( root_xp , iter_xp )
	2178	{
	2179	current_xp = XLIST_ELEMENT( iter_xp , process_t , txt_list );
	2180	process_display( current_xp );
	2181	}
	2182
[443]	2183	// release TXT0 lock in busy waiting mode
[564]	2184	remote_busylock_release( txt0_lock_xp );
[443]	2185
	2186	// release lock on attached process list
[564]	2187	remote_busylock_release( lock_xp );
[435]	2188
	2189	} // end process_txt_display

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