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/* SPDX-License-Identifier: GPL-2.0-or-later */
/***************************************************************************
***************************************************************************/
#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 "helper/types.h"
#include "rtos_ecos_stackings.h"
static bool ecos_detect_rtos(struct target *target);
static int ecos_create(struct target *target);
static int ecos_update_threads(struct rtos *rtos);
static int ecos_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, struct rtos_reg **reg_list, int *num_regs);
static int ecos_get_symbol_list_to_lookup(struct symbol_table_elem *symbol_list[]);
struct ecos_thread_state {
int value;
const char *desc;
};
static const struct ecos_thread_state ecos_thread_states[] = {
{ 0, "Ready" },
{ 1, "Sleeping" },
{ 2, "Countsleep" },
{ 4, "Suspended" },
{ 8, "Creating" },
{ 16, "Exited" }
};
#define ECOS_NUM_STATES ARRAY_SIZE(ecos_thread_states)
struct ecos_params {
const char *target_name;
unsigned char pointer_width;
unsigned char thread_stack_offset;
unsigned char thread_name_offset;
unsigned char thread_state_offset;
unsigned char thread_next_offset;
unsigned char thread_uniqueid_offset;
const struct rtos_register_stacking *stacking_info;
};
static const struct ecos_params ecos_params_list[] = {
{
"cortex_m", /* target_name */
4, /* pointer_width; */
0x0c, /* thread_stack_offset; */
0x9c, /* thread_name_offset; */
0x3c, /* thread_state_offset; */
0xa0, /* thread_next_offset */
0x4c, /* thread_uniqueid_offset */
&rtos_ecos_cortex_m3_stacking /* stacking_info */
}
};
enum ecos_symbol_values {
ECOS_VAL_THREAD_LIST = 0,
ECOS_VAL_CURRENT_THREAD_PTR = 1
};
static const char * const ecos_symbol_list[] = {
"Cyg_Thread::thread_list",
"Cyg_Scheduler_Base::current_thread",
NULL
};
const struct rtos_type ecos_rtos = {
.name = "eCos",
.detect_rtos = ecos_detect_rtos,
.create = ecos_create,
.update_threads = ecos_update_threads,
.get_thread_reg_list = ecos_get_thread_reg_list,
.get_symbol_list_to_lookup = ecos_get_symbol_list_to_lookup,
};
static int ecos_update_threads(struct rtos *rtos)
{
int retval;
int tasks_found = 0;
int thread_list_size = 0;
const struct ecos_params *param;
if (!rtos)
return -1;
if (!rtos->rtos_specific_params)
return -3;
param = (const struct ecos_params *) rtos->rtos_specific_params;
if (!rtos->symbols) {
LOG_ERROR("No symbols for eCos");
return -4;
}
if (rtos->symbols[ECOS_VAL_THREAD_LIST].address == 0) {
LOG_ERROR("Don't have the thread list head");
return -2;
}
/* wipe out previous thread details if any */
rtos_free_threadlist(rtos);
/* determine the number of current threads */
uint32_t thread_list_head = rtos->symbols[ECOS_VAL_THREAD_LIST].address;
uint32_t thread_index;
target_read_buffer(rtos->target,
thread_list_head,
param->pointer_width,
(uint8_t *) &thread_index);
uint32_t first_thread = thread_index;
do {
thread_list_size++;
retval = target_read_buffer(rtos->target,
thread_index + param->thread_next_offset,
param->pointer_width,
(uint8_t *) &thread_index);
if (retval != ERROR_OK)
return retval;
} while (thread_index != first_thread);
/* read the current thread id */
uint32_t current_thread_addr;
retval = target_read_buffer(rtos->target,
rtos->symbols[ECOS_VAL_CURRENT_THREAD_PTR].address,
4,
(uint8_t *)¤t_thread_addr);
if (retval != ERROR_OK)
return retval;
rtos->current_thread = 0;
retval = target_read_buffer(rtos->target,
current_thread_addr + param->thread_uniqueid_offset,
2,
(uint8_t *)&rtos->current_thread);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read eCos current thread from target");
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 = malloc(
sizeof(struct thread_detail) * thread_list_size);
rtos->thread_details->threadid = 1;
rtos->thread_details->exists = true;
rtos->thread_details->extra_info_str = NULL;
rtos->thread_details->thread_name_str = malloc(sizeof(tmp_str));
strcpy(rtos->thread_details->thread_name_str, tmp_str);
if (thread_list_size == 0) {
rtos->thread_count = 1;
return ERROR_OK;
}
} else {
/* create space for new thread details */
rtos->thread_details = malloc(
sizeof(struct thread_detail) * thread_list_size);
}
/* loop over all threads */
thread_index = first_thread;
do {
#define ECOS_THREAD_NAME_STR_SIZE (200)
char tmp_str[ECOS_THREAD_NAME_STR_SIZE];
unsigned int i = 0;
uint32_t name_ptr = 0;
uint32_t prev_thread_ptr;
/* Save the thread pointer */
uint16_t thread_id;
retval = target_read_buffer(rtos->target,
thread_index + param->thread_uniqueid_offset,
2,
(uint8_t *)&thread_id);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read eCos thread id from target");
return retval;
}
rtos->thread_details[tasks_found].threadid = thread_id;
/* read the name pointer */
retval = target_read_buffer(rtos->target,
thread_index + param->thread_name_offset,
param->pointer_width,
(uint8_t *)&name_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read eCos thread name pointer from target");
return retval;
}
/* Read the thread name */
retval =
target_read_buffer(rtos->target,
name_ptr,
ECOS_THREAD_NAME_STR_SIZE,
(uint8_t *)&tmp_str);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread name from eCos target");
return retval;
}
tmp_str[ECOS_THREAD_NAME_STR_SIZE-1] = '\x00';
if (tmp_str[0] == '\x00')
strcpy(tmp_str, "No Name");
rtos->thread_details[tasks_found].thread_name_str =
malloc(strlen(tmp_str)+1);
strcpy(rtos->thread_details[tasks_found].thread_name_str, tmp_str);
/* Read the thread status */
int64_t thread_status = 0;
retval = target_read_buffer(rtos->target,
thread_index + param->thread_state_offset,
4,
(uint8_t *)&thread_status);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread state from eCos target");
return retval;
}
for (i = 0; (i < ECOS_NUM_STATES) && (ecos_thread_states[i].value != thread_status); i++) {
/*
* empty
*/
}
const char *state_desc;
if (i < ECOS_NUM_STATES)
state_desc = ecos_thread_states[i].desc;
else
state_desc = "Unknown state";
rtos->thread_details[tasks_found].extra_info_str = malloc(strlen(
state_desc)+8);
sprintf(rtos->thread_details[tasks_found].extra_info_str, "State: %s", state_desc);
rtos->thread_details[tasks_found].exists = true;
tasks_found++;
prev_thread_ptr = thread_index;
/* Get the location of the next thread structure. */
thread_index = rtos->symbols[ECOS_VAL_THREAD_LIST].address;
retval = target_read_buffer(rtos->target,
prev_thread_ptr + param->thread_next_offset,
param->pointer_width,
(uint8_t *) &thread_index);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading next thread pointer in eCos thread list");
return retval;
}
} while (thread_index != first_thread);
rtos->thread_count = tasks_found;
return 0;
}
static int ecos_get_thread_reg_list(struct rtos *rtos, int64_t thread_id,
struct rtos_reg **reg_list, int *num_regs)
{
int retval;
const struct ecos_params *param;
if (!rtos)
return -1;
if (thread_id == 0)
return -2;
if (!rtos->rtos_specific_params)
return -3;
param = (const struct ecos_params *) rtos->rtos_specific_params;
/* Find the thread with that thread id */
uint16_t id = 0;
uint32_t thread_list_head = rtos->symbols[ECOS_VAL_THREAD_LIST].address;
uint32_t thread_index;
target_read_buffer(rtos->target, thread_list_head, param->pointer_width,
(uint8_t *)&thread_index);
bool done = false;
while (!done) {
retval = target_read_buffer(rtos->target,
thread_index + param->thread_uniqueid_offset,
2,
(uint8_t *)&id);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading unique id from eCos thread");
return retval;
}
if (id == thread_id) {
done = true;
break;
}
target_read_buffer(rtos->target,
thread_index + param->thread_next_offset,
param->pointer_width,
(uint8_t *) &thread_index);
}
if (done) {
/* Read the stack pointer */
int64_t stack_ptr = 0;
retval = target_read_buffer(rtos->target,
thread_index + param->thread_stack_offset,
param->pointer_width,
(uint8_t *)&stack_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading stack frame from eCos thread");
return retval;
}
return rtos_generic_stack_read(rtos->target,
param->stacking_info,
stack_ptr,
reg_list,
num_regs);
}
return -1;
}
static int ecos_get_symbol_list_to_lookup(struct symbol_table_elem *symbol_list[])
{
unsigned int i;
*symbol_list = calloc(
ARRAY_SIZE(ecos_symbol_list), sizeof(struct symbol_table_elem));
for (i = 0; i < ARRAY_SIZE(ecos_symbol_list); i++)
(*symbol_list)[i].symbol_name = ecos_symbol_list[i];
return 0;
}
static bool ecos_detect_rtos(struct target *target)
{
if ((target->rtos->symbols) &&
(target->rtos->symbols[ECOS_VAL_THREAD_LIST].address != 0)) {
/* looks like eCos */
return true;
}
return false;
}
static int ecos_create(struct target *target)
{
for (unsigned int i = 0; i < ARRAY_SIZE(ecos_params_list); i++)
if (strcmp(ecos_params_list[i].target_name, target->type->name) == 0) {
target->rtos->rtos_specific_params = (void *)&ecos_params_list[i];
target->rtos->current_thread = 0;
target->rtos->thread_details = NULL;
return 0;
}
LOG_ERROR("Could not find target in eCos compatibility list");
return -1;
}
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