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FreeRTOS.c 14.53 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 <helper/time_support.h>
#include <jtag/jtag.h>
#include "target/target.h"
#include "target/target_type.h"
#include "rtos.h"
#include "helper/log.h"
#include "rtos_standard_stackings.h"
#define FreeRTOS_STRUCT( int_type, ptr_type, list_prev_offset )
struct FreeRTOS_params
{
const char * target_name;
const unsigned char thread_count_width;
const unsigned char pointer_width;
const unsigned char list_next_offset;
const unsigned char list_width;
const unsigned char list_elem_next_offset;
const unsigned char list_elem_content_offset;
const unsigned char thread_stack_offset;
const unsigned char thread_name_offset;
const struct rtos_register_stacking* stacking_info;
};
const struct FreeRTOS_params FreeRTOS_params_list[] =
{
{ "cortex_m3", // target_name
4, // thread_count_width;
4, // pointer_width;
16, // list_next_offset;
20, // list_width;
8, // list_elem_next_offset;
12, // list_elem_content_offset
0, // thread_stack_offset;
52, // thread_name_offset;
&rtos_standard_Cortex_M3_stacking, // stacking_info
}
};
#define FREERTOS_NUM_PARAMS ((int)(sizeof(FreeRTOS_params_list)/sizeof(struct FreeRTOS_params)))
static int FreeRTOS_detect_rtos( struct target* target );
static int FreeRTOS_create( struct target* target );
static int FreeRTOS_update_threads( struct rtos *rtos );
static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char ** hex_reg_list );
static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t * symbol_list[]);
struct rtos_type FreeRTOS_rtos =
{
.name = "FreeRTOS",
.detect_rtos = FreeRTOS_detect_rtos,
.create = FreeRTOS_create,
.update_threads = FreeRTOS_update_threads,
.get_thread_reg_list = FreeRTOS_get_thread_reg_list,
.get_symbol_list_to_lookup = FreeRTOS_get_symbol_list_to_lookup,
};
enum FreeRTOS_symbol_values
{
FreeRTOS_VAL_pxCurrentTCB = 0,
FreeRTOS_VAL_pxReadyTasksLists = 1,
FreeRTOS_VAL_xDelayedTaskList1 = 2,
FreeRTOS_VAL_xDelayedTaskList2 = 3,
FreeRTOS_VAL_pxDelayedTaskList = 4,
FreeRTOS_VAL_pxOverflowDelayedTaskList = 5,
FreeRTOS_VAL_xPendingReadyList = 6,
FreeRTOS_VAL_xTasksWaitingTermination = 7,
FreeRTOS_VAL_xSuspendedTaskList = 8,
FreeRTOS_VAL_uxCurrentNumberOfTasks = 9,
FreeRTOS_VAL_uxTopUsedPriority = 10,
};
static char* FreeRTOS_symbol_list[] =
{
"pxCurrentTCB",
"pxReadyTasksLists",
"xDelayedTaskList1",
"xDelayedTaskList2",
"pxDelayedTaskList",
"pxOverflowDelayedTaskList",
"xPendingReadyList",
"xTasksWaitingTermination",
"xSuspendedTaskList",
"uxCurrentNumberOfTasks",
"uxTopUsedPriority",
NULL
};
#define FREERTOS_NUM_SYMBOLS (sizeof(FreeRTOS_symbol_list)/sizeof(char*))
// TODO:
// this is not safe for little endian yet
// may be problems reading if sizes are not 32 bit long integers.
// test mallocs for failure
static int FreeRTOS_update_threads( struct rtos *rtos )
{
int i = 0;
int retval;
int tasks_found = 0;
const struct FreeRTOS_params* param;
if (rtos->rtos_specific_params == NULL )
{
return -1; }
param = (const struct FreeRTOS_params*) rtos->rtos_specific_params;
if ( rtos->symbols == NULL )
{
LOG_OUTPUT("No symbols for FreeRTOS\r\n");
return -3;
}
if ( rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address == 0 )
{
LOG_OUTPUT("Don't have the number of threads in FreeRTOS \r\n");
return -2;
}
int thread_list_size = 0;
retval = target_read_buffer( rtos->target, rtos->symbols[FreeRTOS_VAL_uxCurrentNumberOfTasks].address, param->thread_count_width, (uint8_t *)&thread_list_size);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Could not read FreeRTOS thread count from target\r\n");
return retval;
}
// wipe out previous thread details if any
if ( rtos->thread_details != NULL )
{
int j;
for( j = 0; j < rtos->thread_count; j++ )
{
if ( rtos->thread_details[j].display_str != NULL )
{
free( rtos->thread_details[j].display_str );
rtos->thread_details[j].display_str = NULL;
}
if ( rtos->thread_details[j].thread_name_str != NULL )
{
free( rtos->thread_details[j].thread_name_str );
rtos->thread_details[j].thread_name_str = NULL;
}
if ( rtos->thread_details[j].extra_info_str != NULL )
{
free( rtos->thread_details[j].extra_info_str );
rtos->thread_details[j].extra_info_str = NULL;
}
}
free( rtos->thread_details );
rtos->thread_details = NULL;
}
// read the current thread
retval = target_read_buffer( rtos->target, rtos->symbols[FreeRTOS_VAL_pxCurrentTCB].address, param->pointer_width, (uint8_t *)&rtos->current_thread );
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading current thread in FreeRTOS thread list\r\n");
return retval;
}
if ( ( thread_list_size == 0 ) || ( rtos->current_thread == 0 ) )
{
// Either : No RTOS threads - there is always at least the current execution though
// OR : No current thread - all threads suspended - show the current execution of idling
char tmp_str[] = "Current Execution";
thread_list_size++;
tasks_found++;
rtos->thread_details = (struct thread_detail*) malloc( sizeof( struct thread_detail ) * thread_list_size );
rtos->thread_details->threadid = 1; rtos->thread_details->exists = true;
rtos->thread_details->display_str = NULL;
rtos->thread_details->extra_info_str = NULL;
rtos->thread_details->thread_name_str = (char*) malloc( sizeof(tmp_str) );
strcpy( rtos->thread_details->thread_name_str, tmp_str );
if ( thread_list_size == 1 )
{
rtos->thread_count = 1;
return ERROR_OK;
}
}
else
{
// create space for new thread details
rtos->thread_details = (struct thread_detail*) malloc( sizeof( struct thread_detail ) * thread_list_size );
}
// Find out how many lists are needed to be read from pxReadyTasksLists,
int64_t max_used_priority = 0;
retval = target_read_buffer( rtos->target, rtos->symbols[FreeRTOS_VAL_uxTopUsedPriority].address, param->pointer_width, (uint8_t *)&max_used_priority );
symbol_address_t* list_of_lists = (symbol_address_t *)malloc( sizeof( symbol_address_t ) * ( max_used_priority + 5 ) );
int num_lists;
for( num_lists = 0; num_lists < max_used_priority; num_lists++ )
{
list_of_lists[num_lists] = rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address + num_lists * param->list_width;
}
list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList1].address;
list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xDelayedTaskList2].address;
list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xPendingReadyList].address;
list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xSuspendedTaskList].address;
list_of_lists[num_lists++] = rtos->symbols[FreeRTOS_VAL_xTasksWaitingTermination].address;
for( i = 0; i < num_lists; i++ )
{
if ( list_of_lists[i] == 0 )
{
continue;
}
// Read the number of threads in this list
int64_t list_thread_count = 0;
retval = target_read_buffer( rtos->target, list_of_lists[i], param->thread_count_width, (uint8_t *)&list_thread_count);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading number of threads in FreeRTOS thread list\r\n");
return retval;
}
if ( list_thread_count == 0 )
{
continue;
}
// Read the location of first list item
uint64_t prev_list_elem_ptr = -1;
uint64_t list_elem_ptr = 0;
retval = target_read_buffer( rtos->target, list_of_lists[i] + param->list_next_offset, param->pointer_width, (uint8_t *)&list_elem_ptr);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading first thread item location in FreeRTOS thread list\r\n");
return retval;
}
while ( (list_thread_count > 0) && ( list_elem_ptr != 0) && ( list_elem_ptr != prev_list_elem_ptr ) && ( tasks_found < thread_list_size ) )
{
// Get the location of the thread structure.
rtos->thread_details[tasks_found].threadid = 0;
retval = target_read_buffer( rtos->target, list_elem_ptr + param->list_elem_content_offset, param->pointer_width, (uint8_t *)&(rtos->thread_details[tasks_found].threadid));
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading thread list item object in FreeRTOS thread list\r\n");
return retval;
}
// get thread name
#define FREERTOS_THREAD_NAME_STR_SIZE (200)
char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
// Read the thread name
retval = target_read_buffer( rtos->target, rtos->thread_details[tasks_found].threadid + param->thread_name_offset, FREERTOS_THREAD_NAME_STR_SIZE, (uint8_t *)&tmp_str);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading first thread item location in FreeRTOS thread list\r\n");
return retval;
}
tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
if ( tmp_str[0] == '\x00' )
{
strcpy(tmp_str,"No Name");
}
rtos->thread_details[tasks_found].thread_name_str = (char*)malloc( strlen(tmp_str)+1 );
strcpy( rtos->thread_details[tasks_found].thread_name_str, tmp_str );
rtos->thread_details[tasks_found].display_str = NULL;
rtos->thread_details[tasks_found].exists = true;
if ( rtos->thread_details[tasks_found].threadid == rtos->current_thread )
{
char running_str[] = "Running";
rtos->thread_details[tasks_found].extra_info_str = (char*) malloc( sizeof(running_str) );
strcpy( rtos->thread_details[tasks_found].extra_info_str, running_str );
}
else
{
rtos->thread_details[tasks_found].extra_info_str = NULL;
}
tasks_found++;
list_thread_count--;
prev_list_elem_ptr = list_elem_ptr;
list_elem_ptr = 0;
retval = target_read_buffer( rtos->target, prev_list_elem_ptr + param->list_elem_next_offset, param->pointer_width, (uint8_t *)&list_elem_ptr);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading next thread item location in FreeRTOS thread list\r\n");
return retval;
}
}
}
free( list_of_lists );
rtos->thread_count = tasks_found;
return 0;
}
static int FreeRTOS_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char ** hex_reg_list )
{
int retval;
const struct FreeRTOS_params* param;
int64_t stack_ptr = 0;
*hex_reg_list = NULL;
if ( rtos == NULL )
{
return -1;
}
if ( thread_id == 0 )
{
return -2;
}
if (rtos->rtos_specific_params == NULL )
{
return -1;
}
param = (const struct FreeRTOS_params*) rtos->rtos_specific_params;
// Read the stack pointer
retval = target_read_buffer( rtos->target, thread_id + param->thread_stack_offset, param->pointer_width, (uint8_t*)&stack_ptr);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading stack frame from FreeRTOS thread\r\n");
return retval;
}
return rtos_generic_stack_read( rtos->target, param->stacking_info, stack_ptr, hex_reg_list );
}
static int FreeRTOS_get_symbol_list_to_lookup(symbol_table_elem_t * symbol_list[])
{
unsigned int i;
*symbol_list = (symbol_table_elem_t *) malloc( sizeof( symbol_table_elem_t ) * FREERTOS_NUM_SYMBOLS );
for( i = 0; i < FREERTOS_NUM_SYMBOLS; i++ )
{
(*symbol_list)[i].symbol_name = FreeRTOS_symbol_list[i];
}
return 0;
}
#if 0
static int FreeRTOS_set_current_thread(struct rtos *rtos, threadid_t thread_id)
{
return 0;
}
static int FreeRTOS_get_thread_ascii_info( struct rtos* rtos, threadid_t thread_id, char ** info )
{
int retval;
const struct FreeRTOS_params* param;
if ( rtos == NULL )
{
return -1;
}
if ( thread_id == 0 ) {
return -2;
}
if (rtos->rtos_specific_params == NULL )
{
return -3;
}
param = (const struct FreeRTOS_params*) rtos->rtos_specific_params;
#define FREERTOS_THREAD_NAME_STR_SIZE (200)
char tmp_str[FREERTOS_THREAD_NAME_STR_SIZE];
// Read the thread name
retval = target_read_buffer( rtos->target, thread_id + param->thread_name_offset, FREERTOS_THREAD_NAME_STR_SIZE, (uint8_t *)&tmp_str);
if ( retval != ERROR_OK )
{
LOG_OUTPUT("Error reading first thread item location in FreeRTOS thread list\r\n");
return retval;
}
tmp_str[FREERTOS_THREAD_NAME_STR_SIZE-1] = '\x00';
if ( tmp_str[0] == '\x00' )
{
strcpy(tmp_str,"No Name");
}
*info = (char*)malloc( strlen(tmp_str)+1 );
strcpy( *info, tmp_str );
return 0;
}
#endif
static int FreeRTOS_detect_rtos( struct target* target )
{
if ( ( target->rtos->symbols != NULL ) &&
( target->rtos->symbols[FreeRTOS_VAL_pxReadyTasksLists].address != 0 ) )
{
// looks like FreeRTOS
return 1;
}
return 0;
return 0;
}
static int FreeRTOS_create( struct target* target )
{
int i = 0;
while ( ( i < FREERTOS_NUM_PARAMS ) && ( 0 != strcmp( FreeRTOS_params_list[i].target_name, target->type->name ) ) )
{
i++;
}
if ( i >= FREERTOS_NUM_PARAMS )
{
LOG_OUTPUT("Could not find target in FreeRTOS compatibility list\r\n");
return -1;
}
target->rtos->rtos_specific_params = (void*) &FreeRTOS_params_list[i];
return 0;
}