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rtos.c

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    Alan Bowman authored and Øyvind Harboe committed
    a57daf23
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    rtos.c 16.68 KiB
    /***************************************************************************
     *   Copyright (C) 2011 by Broadcom Corporation                            *
     *   Evan Hunter - ehunter@broadcom.com                                    *
     *                                                                         *
     *   This program is free software; you can redistribute it and/or modify  *
     *   it under the terms of the GNU General Public License as published by  *
     *   the Free Software Foundation; either version 2 of the License, or     *
     *   (at your option) any later version.                                   *
     *                                                                         *
     *   This program is distributed in the hope that it will be useful,       *
     *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
     *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
     *   GNU General Public License for more details.                          *
     *                                                                         *
     *   You should have received a copy of the GNU General Public License     *
     *   along with this program; if not, write to the                         *
     *   Free Software Foundation, Inc.,                                       *
     *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
     ***************************************************************************/
    
    #ifdef HAVE_CONFIG_H
    #include "config.h"
    #endif
    
    
    #include "rtos.h"
    #include "target/target.h"
    #include "helper/log.h"
    #include "server/gdb_server.h"
    
    
    static int64_t current_threadid = -1;
    
    static void hex_to_str( char* dst, char * hex_src );
    static int str_to_hex( char* hex_dst, char* src );
    
    
    /* RTOSs */
    extern struct rtos_type FreeRTOS_rtos;
    extern struct rtos_type ThreadX_rtos;
    extern struct rtos_type eCos_rtos;
    
    static struct rtos_type *rtos_types[] =
    {
    	&ThreadX_rtos,
    	&FreeRTOS_rtos,
    	&eCos_rtos,
    	NULL
    };
    
    
    int rtos_create(Jim_GetOptInfo *goi, struct target * target)
    {
    	int x;
    	char *cp;
    
    	if (! goi->isconfigure) {
    		if (goi->argc != 0) {
    			if (goi->argc != 0) {
    				Jim_WrongNumArgs(goi->interp,
    						goi->argc, goi->argv,
    						"NO PARAMS");
    				return JIM_ERR;
    			}
    
    			Jim_SetResultString(goi->interp,
    					target_type_name(target), -1);
    		}
    	}
    
    	if (target->rtos) {
    		free((void *)(target->rtos));
    	}
    //			e = Jim_GetOpt_String(goi, &cp, NULL);
    //			target->rtos = strdup(cp);
    
    	Jim_GetOpt_String(goi, &cp, NULL);
    	/* now does target type exist */
    
    	if ( 0 == strcmp( cp, "auto") )
    	{
    		// auto detection of RTOS
    		target->rtos_auto_detect = true;
    		x = 0;
    	}
    	else
    	{
    
    		for (x = 0 ; rtos_types[x] ; x++) {
    			if (0 == strcmp(cp, rtos_types[x]->name)) {
    				/* found */
    				break;
    			}
    		}
    		if (rtos_types[x] == NULL) {
    			Jim_SetResultFormatted(goi->interp, "Unknown rtos type %s, try one of ", cp);
    			for (x = 0 ; rtos_types[x] ; x++) {
    				if (rtos_types[x + 1]) {
    					Jim_AppendStrings(goi->interp,
    									   Jim_GetResult(goi->interp),
    									   rtos_types[x]->name,
    									   ", ", NULL);
    				} else {
    					Jim_AppendStrings(goi->interp,
    									   Jim_GetResult(goi->interp),
    									   " or ",
    									   rtos_types[x]->name,NULL);
    				}
    			}
    			return JIM_ERR;
    		}
    	}
    	/* Create it */
    	target->rtos = calloc(1,sizeof(struct rtos));
    	target->rtos->type = rtos_types[x];
    	target->rtos->current_thread = 0;
    	target->rtos->symbols = NULL;
    	target->rtos->target = target;
    
    	if ( 0 != strcmp( cp, "auto") )
    	{
    		target->rtos->type->create( target );
    	}
    
    	return JIM_OK;
    }
    
    
    
    
    int gdb_thread_packet(struct connection *connection, struct target *target, char *packet, int packet_size)
    {
    	if (strstr(packet, "qP"))
    	{
    		#define TAG_THREADID 1		/* Echo the thread identifier */
    		#define TAG_EXISTS 2		/* Is this process defined enough to
    						   fetch registers and its stack */
    		#define TAG_DISPLAY 4		/* A short thing maybe to put on a window */
    		#define TAG_THREADNAME 8	/* string, maps 1-to-1 with a thread is */
    		#define TAG_MOREDISPLAY 16	/* Whatever the kernel wants to say about */
    
    			// TODO: need to scanf the mode variable (or it with the tags), and the threadid
    
    		unsigned long mode;
    		threadid_t threadid = 0;
    		struct thread_detail* detail;
    		sscanf(packet, "qP%8lx%16" SCNx64, &mode, &threadid);
    
    
    		int found = -1;
    
    		if ((target->rtos != NULL) && (target->rtos->thread_details
    				!= NULL)) {
    			int thread_num;
    			for (thread_num = 0; thread_num
    					< target->rtos->thread_count; thread_num++) {
    				if (target->rtos->thread_details[thread_num].threadid
    						== threadid) {
    					if (target->rtos->thread_details[thread_num].exists) {
    						found = thread_num;
    					}
    				}
    			}
    		}
    		if (found == -1) {
    			gdb_put_packet(connection, "E01", 3); // thread not found
    			return ERROR_OK;
    		}
    
    		detail = &target->rtos->thread_details[found];
    
    		if ( detail->display_str != NULL )
    		{
    			mode &= TAG_DISPLAY;
    		}
    		if ( detail->thread_name_str != NULL )
    		{
    			mode &= TAG_THREADNAME;
    		}
    		if ( detail->extra_info_str != NULL )
    		{
    			mode &= TAG_MOREDISPLAY;
    		}
    
    
    		mode &= TAG_THREADID | TAG_EXISTS;
    
    		char thread_str[1000];
    
    		sprintf(thread_str, "%08lx", mode);
    		sprintf(thread_str, "%016" PRIx64, threadid);
    
    
    		if (mode & TAG_THREADID) {
    			sprintf(thread_str, "%08" PRIx32 "10%016" PRIx64, TAG_THREADID, threadid);
    		}
    		if (mode & TAG_EXISTS) {
    			sprintf(thread_str, "%08" PRIx32 "08%08" PRIx32, TAG_EXISTS, (detail->exists==true)?1:0);
    		}
    		if (mode & TAG_DISPLAY) {
    			sprintf(thread_str, "%08" PRIx32 "%02x%s", TAG_DISPLAY, (unsigned char)strlen(detail->display_str), detail->display_str );
    		}
    		if (mode & TAG_MOREDISPLAY) {
    			sprintf(thread_str, "%08" PRIx32 "%02x%s", TAG_MOREDISPLAY, (unsigned char)strlen(detail->extra_info_str), detail->extra_info_str );
    		}
    		if (mode & TAG_THREADNAME) {
    			sprintf(thread_str, "%08" PRIx32 "%02x%s", TAG_THREADNAME, (unsigned char)strlen(detail->thread_name_str), detail->thread_name_str );
    		}
    
    		//gdb_put_packet(connection, tmpstr, sizeof(tmpstr)-1);
    		gdb_put_packet(connection, thread_str, strlen(thread_str));
    
    		//			gdb_put_packet(connection, "", 0);
    		//		gdb_put_packet(connection, "OK", 2); // all threads alive
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qThreadExtraInfo,"))
    	{
    		if ((target->rtos != NULL) && (target->rtos->thread_details != NULL) && (target->rtos->thread_count != 0))
    		{
    			threadid_t threadid = 0;
    			int found = -1;
    			sscanf(packet, "qThreadExtraInfo,%" SCNx64, &threadid );
    
    			if ((target->rtos != NULL) && (target->rtos->thread_details
    					!= NULL)) {
    				int thread_num;
    				for (thread_num = 0; thread_num
    						< target->rtos->thread_count; thread_num++) {
    					if (target->rtos->thread_details[thread_num].threadid
    							== threadid) {
    						if (target->rtos->thread_details[thread_num].exists) {
    							found = thread_num;
    						}
    					}
    				}
    			}
    			if (found == -1) {
    				gdb_put_packet(connection, "E01", 3); // thread not found
    				return ERROR_OK;
    			}
    
    			struct thread_detail* detail = &target->rtos->thread_details[found];
    
    			int str_size = 0;
    			if ( detail->display_str != NULL )
    			{
    				str_size += strlen(detail->display_str);
    			}
    			if ( detail->thread_name_str != NULL )
    			{
    				str_size += strlen(detail->thread_name_str);
    			}
    			if ( detail->extra_info_str != NULL )
    			{
    				str_size += strlen(detail->extra_info_str);
    			}
    
    			char * tmp_str = (char*) malloc( str_size + 7 );
    			char*  tmp_str_ptr = tmp_str;
    
    			if ( detail->display_str != NULL )
    			{
    				tmp_str_ptr += sprintf( tmp_str_ptr, "%s", detail->display_str );
    			}
    			if ( detail->thread_name_str != NULL )
    			{
    				if ( tmp_str_ptr != tmp_str )
    				{
    					tmp_str_ptr += sprintf( tmp_str_ptr, " : " );
    				}
    				tmp_str_ptr += sprintf( tmp_str_ptr, "%s", detail->thread_name_str );
    			}
    			if ( detail->extra_info_str != NULL )
    			{
    				if ( tmp_str_ptr != tmp_str )
    				{
    					tmp_str_ptr += sprintf( tmp_str_ptr, " : " );
    				}
    				tmp_str_ptr += sprintf( tmp_str_ptr, " : %s", detail->extra_info_str );
    			}
    
    			char * hex_str = (char*) malloc( strlen(tmp_str)*2 +1 );
    			str_to_hex( hex_str, tmp_str );
    
    			gdb_put_packet(connection, hex_str, strlen(hex_str));
    			free(hex_str);
    			free(tmp_str);
    			return ERROR_OK;
    
    		}
    		gdb_put_packet(connection, "", 0);
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qSymbol"))
    	{
    		if ( target->rtos != NULL )
    		{
    			int next_symbol_num = -1;
    			if (target->rtos->symbols == NULL)
    			{
    				target->rtos->type->get_symbol_list_to_lookup( &target->rtos->symbols );
    			}
    			if (0 == strcmp( "qSymbol::", packet ) )
    			{
    				// first query -
    				next_symbol_num = 0;
    			}
    			else
    			{
    				int64_t value = 0;
    				char * hex_name_str = malloc( strlen(packet));
    				char * name_str;
    				int symbol_num;
    
    				char* found = strstr( packet, "qSymbol::" );
    				int numconv;
    				if (0 == found )
    				{
    					numconv =sscanf(packet, "qSymbol:%" SCNx64 ":%s", &value, hex_name_str);
    				}
    				else
    				{
    					// No value returned by GDB - symbol was not found
    					numconv =sscanf(packet, "qSymbol::%s", hex_name_str);
    				}
    				name_str = (char*) malloc( 1+ strlen(hex_name_str) / 2 );
    
    				hex_to_str( name_str, hex_name_str );
    
    
    				symbol_num = 0;
    				while ( ( target->rtos->symbols[ symbol_num ].symbol_name != NULL ) && ( 0 != strcmp( target->rtos->symbols[ symbol_num ].symbol_name, name_str ) ) )
    				{
    					symbol_num++;
    				}
    
    
    				if ( target->rtos->symbols[ symbol_num ].symbol_name == NULL )
    				{
    					LOG_OUTPUT("ERROR: unknown symbol\r\n");
    					gdb_put_packet(connection, "OK", 2);
    					return ERROR_OK;
    				}
    
    				target->rtos->symbols[ symbol_num ].address = value;
    
    				next_symbol_num = symbol_num+1;
    				free( hex_name_str );
    				free( name_str );
    
    			}
    
    			int symbols_done = 0;
    			if ( target->rtos->symbols[ next_symbol_num ].symbol_name == NULL )
    			{
    				if ( ( target->rtos_auto_detect == false ) ||
    					 ( 1 == target->rtos->type->detect_rtos( target ) ) )
    				{
    					// Found correct RTOS or not autodetecting
    					if ( target->rtos_auto_detect == true )
    					{
    						LOG_OUTPUT( "Auto-detected RTOS: %s\r\n",target->rtos->type->name );
    					}
    					symbols_done = 1;
    				}
    				else
    				{
    					// Auto detecting RTOS and currently not found
    					if( 1 != rtos_try_next( target ) )
    					{
    						// No more RTOS's to try
    						symbols_done = 1;
    					}
    					else
    					{
    						next_symbol_num = 0;
    						target->rtos->type->get_symbol_list_to_lookup( &target->rtos->symbols );
    					}
    
    				}
    			}
    
    
    			if ( symbols_done == 1 )
    			{
    				target->rtos_auto_detect = false;
    				target->rtos->type->create( target );
    				target->rtos->type->update_threads(target->rtos);
    				// No more symbols needed
    				gdb_put_packet(connection, "OK", 2);
    				return ERROR_OK;
    
    			}
    			else
    			{
    				char* symname = target->rtos->symbols[ next_symbol_num ].symbol_name;
    				char qsymstr[] = "qSymbol:";
    				char * opstring = (char*)malloc(sizeof(qsymstr)+strlen(symname)*2+1);
    				char * posptr = opstring;
    				posptr += sprintf( posptr, "%s", qsymstr );
    				str_to_hex( posptr, symname );
    				gdb_put_packet(connection, opstring, strlen(opstring));
    				free(opstring);
    				return ERROR_OK;
    			}
    
    		}
    		gdb_put_packet(connection, "OK", 2);
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qfThreadInfo"))
    	{
    		int i;
    		if ( ( target->rtos != NULL ) && ( target->rtos->thread_count != 0 ) )
    		{
    
    			char* out_str = (char*) malloc(17 * target->rtos->thread_count + 5);
    			char* tmp_str = out_str;
    			tmp_str += sprintf(tmp_str, "m");
    			for (i = 0; i < target->rtos->thread_count; i++) {
    				if (i != 0) {
    					tmp_str += sprintf(tmp_str, ",");
    				}
    				tmp_str += sprintf(tmp_str, "%016" PRIx64,
    						target->rtos->thread_details[i].threadid);
    			}
    			tmp_str[0] = 0;
    			gdb_put_packet(connection, out_str, strlen(out_str));
    		}
    		else
    		{
    			gdb_put_packet(connection, "", 0);
    		}
    
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qsThreadInfo"))
    	{
    		gdb_put_packet(connection, "l", 1);
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qAttached"))
    	{
    		gdb_put_packet(connection, "1", 1);
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qOffsets"))
    	{
    		char offsets[] = "Text=0;Data=0;Bss=0";
    		gdb_put_packet(connection, offsets, sizeof(offsets)-1);
    		return ERROR_OK;
    	}
    	else if (strstr(packet, "qC"))
    	{
    		gdb_put_packet(connection, "QC0", 3);
    		return ERROR_OK;
    	}
    	else if ( packet[0] == 'T' ) // Is thread alive?
    	{
    		threadid_t threadid;
    		int found = -1;
    		sscanf(packet, "T%" SCNx64, &threadid);
    		if ((target->rtos != NULL) && (target->rtos->thread_details
    				!= NULL)) {
    			int thread_num;
    			for (thread_num = 0; thread_num
    					< target->rtos->thread_count; thread_num++) {
    				if (target->rtos->thread_details[thread_num].threadid
    						== threadid) {
    					if (target->rtos->thread_details[thread_num].exists) {
    						found = thread_num;
    					}
    				}
    			}
    		}
    		if (found != -1) {
    			gdb_put_packet(connection, "OK", 2); // thread alive
    		} else {
    			gdb_put_packet(connection, "E01", 3); // thread not found
    		}
    	}
    	else if ( packet[0] == 'H') // Set current thread ( 'c' for step and continue, 'g' for all other operations )
    	{
    		if (packet[1] == 'g')
    		{
    			sscanf(packet, "Hg%16" SCNx64, &current_threadid);
    		}
    		gdb_put_packet(connection, "OK", 2);
    	}
    
    	return GDB_THREAD_PACKET_NOT_CONSUMED;
    }
    
    int rtos_get_gdb_reg_list(struct connection *connection, struct target *target, struct reg **reg_list[], int *reg_list_size)
    {
    	if ( ( target->rtos != NULL ) &&
    		 ( current_threadid != -1 ) &&
    		 ( current_threadid != 0 ) &&
    		 ( current_threadid != target->rtos->current_thread ) )
    	{
    		char * hex_reg_list;
    		target->rtos->type->get_thread_reg_list( target->rtos, current_threadid, &hex_reg_list );
    
    		if ( hex_reg_list != NULL )
    		{
    			gdb_put_packet(connection, hex_reg_list, strlen(hex_reg_list));
    			free(hex_reg_list);
    			return ERROR_OK;
    		}
    	}
    	return ERROR_FAIL;
    }
    
    
    
    int rtos_generic_stack_read( struct target * target, const struct rtos_register_stacking* stacking, int64_t stack_ptr, char ** hex_reg_list )
    {
    	int list_size = 0;
    	char * tmp_str_ptr;
    	int64_t new_stack_ptr;
    	int i;
    	int retval;
    
    	if ( stack_ptr == 0)
    	{
    		LOG_OUTPUT("Error: null stack pointer in thread\r\n");
    		return -5;
    	}
    	// Read the stack
    	uint8_t * stack_data = (uint8_t*) malloc( stacking->stack_registers_size );
    	uint32_t address = stack_ptr;
    
    	if ( stacking->stack_growth_direction == 1 )
    	{
    		address -=  stacking->stack_registers_size;
    	}
    	retval = target_read_buffer( target, address, stacking->stack_registers_size, stack_data);
    	if ( retval != ERROR_OK )
    	{
    		LOG_OUTPUT("Error reading stack frame from FreeRTOS thread\r\n");
    		return retval;
    	}
    /*
    	LOG_OUTPUT("Stack Data :");
    	for(i = 0; i < stacking->stack_registers_size; i++ )
    	{
    		LOG_OUTPUT("%02X",stack_data[i]);
    	}
    	LOG_OUTPUT("\r\n");
    */
    	for( i = 0; i < stacking->num_output_registers; i++ )
    	{
    		list_size += stacking->register_offsets[i].width_bits/8;
    	}
    	*hex_reg_list = (char*)malloc( list_size*2 +1 );
    	tmp_str_ptr = *hex_reg_list;
    	new_stack_ptr = stack_ptr - stacking->stack_growth_direction * stacking->stack_registers_size;
    	for( i = 0; i < stacking->num_output_registers; i++ )
    	{
    		int j;
    		for ( j = 0; j < stacking->register_offsets[i].width_bits/8; j++ )
    		{
    			if ( stacking->register_offsets[i].offset == -1 )
    			{
    				tmp_str_ptr += sprintf( tmp_str_ptr, "%02x", 0 );
    			}
    			else if ( stacking->register_offsets[i].offset == -2 )
    			{
    				tmp_str_ptr += sprintf( tmp_str_ptr, "%02x", ((uint8_t*)&new_stack_ptr)[j] );
    			}
    			else
    			{
    				tmp_str_ptr += sprintf( tmp_str_ptr,"%02x", stack_data[ stacking->register_offsets[i].offset + j ] );
    			}
    		}
    	}
    //	LOG_OUTPUT("Output register string: %s\r\n", *hex_reg_list);
    	return ERROR_OK;
    }
    
    int rtos_try_next( struct target * target )
    {
    	int x;
    
    	if ( target->rtos == NULL )
    	{
    		return -1;
    	}
    
    	for (x = 0 ; rtos_types[x] ; x++) {
    		if (target->rtos->type == rtos_types[x] ) {
    			/* found */
    			if ( rtos_types[x+1] != NULL )
    			{
    				target->rtos->type = rtos_types[x+1];
    				if ( target->rtos->symbols != NULL )
    				{
    					free( target->rtos->symbols );
    				}
    				return 1;
    			}
    			else
    			{
    				// No more rtos types
    				return 0;
    			}
    
    		}
    	}
    	return 0;
    
    }
    
    static void hex_to_str( char* dst, char * hex_src )
    {
    	int src_pos = 0;
    	int dst_pos = 0;
    
    	while ( hex_src[src_pos] != '\x00' )
    	{
    		char hex_char = hex_src[src_pos];
    		char hex_digit_val = (hex_char>='a')?hex_char-'a'+10:(hex_char>='A')?hex_char-'A'+10:hex_char-'0';
    		if ( 0 == (src_pos & 0x01) )
    		{
    			dst[dst_pos] = hex_digit_val;
    			dst[dst_pos+1] = 0;
    		}
    		else
    		{
    			((unsigned char*)dst)[dst_pos] <<= 4;
    			((unsigned char*)dst)[dst_pos] += hex_digit_val;
    			dst_pos++;
    		}
    		src_pos++;
    	}
    
    }
    
    static int str_to_hex( char* hex_dst, char* src )
    {
    	char * posptr = hex_dst;
    	unsigned i;
    	for( i = 0; i < strlen(src); i++)
    	{
    		posptr += sprintf( posptr, "%02x", (unsigned char)src[i] );
    	}
    	return (posptr-hex_dst);
    }
    
    
    int rtos_update_threads( struct target* target )
    {
    	if ((target->rtos != NULL) && (target->rtos->type != NULL))
    	{
    		target->rtos->type->update_threads(target->rtos);
    	}
    	return ERROR_OK;
    }