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openocd/src/rtos/ThreadX.c

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/***************************************************************************
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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 "helper/types.h"
#include "rtos_standard_stackings.h"
static const struct rtos_register_stacking *get_stacking_info(const struct rtos *rtos, int64_t stack_ptr);
static const struct rtos_register_stacking *get_stacking_info_arm926ejs(const struct rtos *rtos, int64_t stack_ptr);
static int is_thread_id_valid(const struct rtos *rtos, int64_t thread_id);
static int is_thread_id_valid_arm926ejs(const struct rtos *rtos, int64_t thread_id);
static int ThreadX_detect_rtos(struct target *target);
static int ThreadX_create(struct target *target);
static int ThreadX_update_threads(struct rtos *rtos);
static int ThreadX_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list);
static int ThreadX_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[]);
struct ThreadX_thread_state {
int value;
const char *desc;
};
static const struct ThreadX_thread_state ThreadX_thread_states[] = {
{ 0, "Ready" },
{ 1, "Completed" },
{ 2, "Terminated" },
{ 3, "Suspended" },
{ 4, "Sleeping" },
{ 5, "Waiting - Queue" },
{ 6, "Waiting - Semaphore" },
{ 7, "Waiting - Event flag" },
{ 8, "Waiting - Memory" },
{ 9, "Waiting - Memory" },
{ 10, "Waiting - I/O" },
{ 11, "Waiting - Filesystem" },
{ 12, "Waiting - Network" },
{ 13, "Waiting - Mutex" },
};
#define THREADX_NUM_STATES (sizeof(ThreadX_thread_states)/sizeof(struct ThreadX_thread_state))
#define ARM926EJS_REGISTERS_SIZE_SOLICITED (11 * 4)
static const struct stack_register_offset rtos_threadx_arm926ejs_stack_offsets_solicited[] = {
{ -1, 32 }, /* r0 */
{ -1, 32 }, /* r1 */
{ -1, 32 }, /* r2 */
{ -1, 32 }, /* r3 */
{ 0x08, 32 }, /* r4 */
{ 0x0C, 32 }, /* r5 */
{ 0x10, 32 }, /* r6 */
{ 0x14, 32 }, /* r7 */
{ 0x18, 32 }, /* r8 */
{ 0x1C, 32 }, /* r9 */
{ 0x20, 32 }, /* r10 */
{ 0x24, 32 }, /* r11 */
{ -1, 32 }, /* r12 */
{ -2, 32 }, /* sp (r13) */
{ 0x28, 32 }, /* lr (r14) */
{ -1, 32 }, /* pc (r15) */
/*{ -1, 32 },*/ /* lr (r14) */
/*{ 0x28, 32 },*/ /* pc (r15) */
{ 0x04, 32 }, /* xPSR */
};
#define ARM926EJS_REGISTERS_SIZE_INTERRUPT (17 * 4)
static const struct stack_register_offset rtos_threadx_arm926ejs_stack_offsets_interrupt[] = {
{ 0x08, 32 }, /* r0 */
{ 0x0C, 32 }, /* r1 */
{ 0x10, 32 }, /* r2 */
{ 0x14, 32 }, /* r3 */
{ 0x18, 32 }, /* r4 */
{ 0x1C, 32 }, /* r5 */
{ 0x20, 32 }, /* r6 */
{ 0x24, 32 }, /* r7 */
{ 0x28, 32 }, /* r8 */
{ 0x2C, 32 }, /* r9 */
{ 0x30, 32 }, /* r10 */
{ 0x34, 32 }, /* r11 */
{ 0x38, 32 }, /* r12 */
{ -2, 32 }, /* sp (r13) */
{ 0x3C, 32 }, /* lr (r14) */
{ 0x40, 32 }, /* pc (r15) */
{ 0x04, 32 }, /* xPSR */
};
const struct rtos_register_stacking rtos_threadx_arm926ejs_stacking[] = {
{
ARM926EJS_REGISTERS_SIZE_SOLICITED, /* stack_registers_size */
-1, /* stack_growth_direction */
17, /* num_output_registers */
NULL, /* stack_alignment */
rtos_threadx_arm926ejs_stack_offsets_solicited /* register_offsets */
},
{
ARM926EJS_REGISTERS_SIZE_INTERRUPT, /* stack_registers_size */
-1, /* stack_growth_direction */
17, /* num_output_registers */
NULL, /* stack_alignment */
rtos_threadx_arm926ejs_stack_offsets_interrupt /* register_offsets */
},
};
struct ThreadX_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;
const struct rtos_register_stacking *stacking_info;
size_t stacking_info_nb;
const struct rtos_register_stacking* (*fn_get_stacking_info)(const struct rtos *rtos, int64_t stack_ptr);
int (*fn_is_thread_id_valid)(const struct rtos *rtos, int64_t thread_id);
};
static const struct ThreadX_params ThreadX_params_list[] = {
{
"cortex_m", /* target_name */
4, /* pointer_width; */
8, /* thread_stack_offset; */
40, /* thread_name_offset; */
48, /* thread_state_offset; */
136, /* thread_next_offset */
&rtos_standard_Cortex_M3_stacking, /* stacking_info */
1, /* stacking_info_nb */
NULL, /* fn_get_stacking_info */
NULL, /* fn_is_thread_id_valid */
},
{
"cortex_r4", /* target_name */
4, /* pointer_width; */
8, /* thread_stack_offset; */
40, /* thread_name_offset; */
48, /* thread_state_offset; */
136, /* thread_next_offset */
&rtos_standard_Cortex_R4_stacking, /* stacking_info */
1, /* stacking_info_nb */
NULL, /* fn_get_stacking_info */
NULL, /* fn_is_thread_id_valid */
},
{
"arm926ejs", /* target_name */
4, /* pointer_width; */
8, /* thread_stack_offset; */
40, /* thread_name_offset; */
48, /* thread_state_offset; */
136, /* thread_next_offset */
rtos_threadx_arm926ejs_stacking, /* stacking_info */
2, /* stacking_info_nb */
get_stacking_info_arm926ejs, /* fn_get_stacking_info */
is_thread_id_valid_arm926ejs, /* fn_is_thread_id_valid */
},
};
#define THREADX_NUM_PARAMS ((int)(sizeof(ThreadX_params_list)/sizeof(struct ThreadX_params)))
enum ThreadX_symbol_values {
ThreadX_VAL_tx_thread_current_ptr = 0,
ThreadX_VAL_tx_thread_created_ptr = 1,
ThreadX_VAL_tx_thread_created_count = 2,
};
static const char * const ThreadX_symbol_list[] = {
"_tx_thread_current_ptr",
"_tx_thread_created_ptr",
"_tx_thread_created_count",
NULL
};
const struct rtos_type ThreadX_rtos = {
.name = "ThreadX",
.detect_rtos = ThreadX_detect_rtos,
.create = ThreadX_create,
.update_threads = ThreadX_update_threads,
.get_thread_reg_list = ThreadX_get_thread_reg_list,
.get_symbol_list_to_lookup = ThreadX_get_symbol_list_to_lookup,
};
static const struct rtos_register_stacking *get_stacking_info(const struct rtos *rtos, int64_t stack_ptr)
{
const struct ThreadX_params *param = (const struct ThreadX_params *) rtos->rtos_specific_params;
if (param->fn_get_stacking_info != NULL)
return param->fn_get_stacking_info(rtos, stack_ptr);
return param->stacking_info + 0;
}
static int is_thread_id_valid(const struct rtos *rtos, int64_t thread_id)
{
const struct ThreadX_params *param;
if (rtos->rtos_specific_params == NULL)
return 0; /* invalid */
param = (const struct ThreadX_params *) rtos->rtos_specific_params;
if (param->fn_is_thread_id_valid != NULL)
return param->fn_is_thread_id_valid(rtos, thread_id);
return (thread_id != 0);
}
static const struct rtos_register_stacking *get_stacking_info_arm926ejs(const struct rtos *rtos, int64_t stack_ptr)
{
const struct ThreadX_params *param = (const struct ThreadX_params *) rtos->rtos_specific_params;
int retval;
uint32_t flag;
retval = target_read_buffer(rtos->target,
stack_ptr,
sizeof(flag),
(uint8_t *)&flag);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading stack data from ThreadX thread: stack_ptr=0x%" PRIx64, stack_ptr);
return NULL;
}
if (flag == 0) {
LOG_DEBUG(" solicited stack");
return param->stacking_info + 0;
} else {
LOG_DEBUG(" interrupt stack: %u", flag);
return param->stacking_info + 1;
}
}
static int is_thread_id_valid_arm926ejs(const struct rtos *rtos, int64_t thread_id)
{
return (thread_id != 0 && thread_id != 1);
}
static int ThreadX_update_threads(struct rtos *rtos)
{
int retval;
int tasks_found = 0;
int thread_list_size = 0;
const struct ThreadX_params *param;
if (rtos == NULL)
return -1;
if (rtos->rtos_specific_params == NULL)
return -3;
param = (const struct ThreadX_params *) rtos->rtos_specific_params;
if (rtos->symbols == NULL) {
LOG_ERROR("No symbols for ThreadX");
return -4;
}
if (rtos->symbols[ThreadX_VAL_tx_thread_created_count].address == 0) {
LOG_ERROR("Don't have the number of threads in ThreadX");
return -2;
}
/* read the number of threads */
retval = target_read_buffer(rtos->target,
rtos->symbols[ThreadX_VAL_tx_thread_created_count].address,
4,
(uint8_t *)&thread_list_size);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read ThreadX thread count from target");
return retval;
}
/* wipe out previous thread details if any */
rtos_free_threadlist(rtos);
/* read the current thread id */
retval = target_read_buffer(rtos->target,
rtos->symbols[ThreadX_VAL_tx_thread_current_ptr].address,
4,
(uint8_t *)&rtos->current_thread);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read ThreadX 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->display_str = NULL;
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);
}
/* Read the pointer to the first thread */
int64_t thread_ptr = 0;
retval = target_read_buffer(rtos->target,
rtos->symbols[ThreadX_VAL_tx_thread_created_ptr].address,
param->pointer_width,
(uint8_t *)&thread_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read ThreadX thread location from target");
return retval;
}
/* loop over all threads */
int64_t prev_thread_ptr = 0;
while ((thread_ptr != prev_thread_ptr) && (tasks_found < thread_list_size)) {
#define THREADX_THREAD_NAME_STR_SIZE (200)
char tmp_str[THREADX_THREAD_NAME_STR_SIZE];
unsigned int i = 0;
int64_t name_ptr = 0;
/* Save the thread pointer */
rtos->thread_details[tasks_found].threadid = thread_ptr;
/* read the name pointer */
retval = target_read_buffer(rtos->target,
thread_ptr + param->thread_name_offset,
param->pointer_width,
(uint8_t *)&name_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read ThreadX thread name pointer from target");
return retval;
}
/* Read the thread name */
retval =
target_read_buffer(rtos->target,
name_ptr,
THREADX_THREAD_NAME_STR_SIZE,
(uint8_t *)&tmp_str);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread name from ThreadX target");
return retval;
}
tmp_str[THREADX_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_ptr + param->thread_state_offset,
4,
(uint8_t *)&thread_status);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread state from ThreadX target");
return retval;
}
for (i = 0; (i < THREADX_NUM_STATES) &&
(ThreadX_thread_states[i].value != thread_status); i++) {
/* empty */
}
const char *state_desc;
if (i < THREADX_NUM_STATES)
state_desc = ThreadX_thread_states[i].desc;
else
state_desc = "Unknown state";
rtos->thread_details[tasks_found].extra_info_str = malloc(strlen(
state_desc)+1);
strcpy(rtos->thread_details[tasks_found].extra_info_str, state_desc);
rtos->thread_details[tasks_found].exists = true;
rtos->thread_details[tasks_found].display_str = NULL;
tasks_found++;
prev_thread_ptr = thread_ptr;
/* Get the location of the next thread structure. */
thread_ptr = 0;
retval = target_read_buffer(rtos->target,
prev_thread_ptr + param->thread_next_offset,
param->pointer_width,
(uint8_t *) &thread_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading next thread pointer in ThreadX thread list");
return retval;
}
}
rtos->thread_count = tasks_found;
return 0;
}
static int ThreadX_get_thread_reg_list(struct rtos *rtos, int64_t thread_id, char **hex_reg_list)
{
int retval;
const struct ThreadX_params *param;
*hex_reg_list = NULL;
if (rtos == NULL)
return -1;
if (!is_thread_id_valid(rtos, thread_id))
return -2;
if (rtos->rtos_specific_params == NULL)
return -3;
param = (const struct ThreadX_params *) rtos->rtos_specific_params;
/* Read the stack pointer */
int64_t stack_ptr = 0;
retval = target_read_buffer(rtos->target,
thread_id + param->thread_stack_offset,
param->pointer_width,
(uint8_t *)&stack_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading stack frame from ThreadX thread");
return retval;
}
LOG_INFO("thread: 0x%" PRIx64 ", stack_ptr=0x%" PRIx64, (uint64_t)thread_id, (uint64_t)stack_ptr);
if (stack_ptr == 0) {
LOG_ERROR("null stack pointer in thread");
return -5;
}
const struct rtos_register_stacking *stacking_info =
get_stacking_info(rtos, stack_ptr);
if (stacking_info == NULL) {
LOG_ERROR("Unknown stacking info for thread id=0x%" PRIx64, (uint64_t)thread_id);
return -6;
}
return rtos_generic_stack_read(rtos->target, stacking_info, stack_ptr, hex_reg_list);
}
static int ThreadX_get_symbol_list_to_lookup(symbol_table_elem_t *symbol_list[])
{
unsigned int i;
*symbol_list = calloc(
ARRAY_SIZE(ThreadX_symbol_list), sizeof(symbol_table_elem_t));
for (i = 0; i < ARRAY_SIZE(ThreadX_symbol_list); i++)
(*symbol_list)[i].symbol_name = ThreadX_symbol_list[i];
return 0;
}
static int ThreadX_detect_rtos(struct target *target)
{
if ((target->rtos->symbols != NULL) &&
(target->rtos->symbols[ThreadX_VAL_tx_thread_created_ptr].address != 0)) {
/* looks like ThreadX */
return 1;
}
return 0;
}
#if 0
static int ThreadX_set_current_thread(struct rtos *rtos, threadid_t thread_id)
{
return 0;
}
static int ThreadX_get_thread_detail(struct rtos *rtos,
threadid_t thread_id,
struct thread_detail *detail)
{
unsigned int i = 0;
int retval;
#define THREADX_THREAD_NAME_STR_SIZE (200)
char tmp_str[THREADX_THREAD_NAME_STR_SIZE];
const struct ThreadX_params *param;
if (rtos == NULL)
return -1;
if (thread_id == 0)
return -2;
if (rtos->rtos_specific_params == NULL)
return -3;
param = (const struct ThreadX_params *) rtos->rtos_specific_params;
if (rtos->symbols == NULL) {
LOG_ERROR("No symbols for ThreadX");
return -3;
}
detail->threadid = thread_id;
int64_t name_ptr = 0;
/* read the name pointer */
retval = target_read_buffer(rtos->target,
thread_id + param->thread_name_offset,
param->pointer_width,
(uint8_t *)&name_ptr);
if (retval != ERROR_OK) {
LOG_ERROR("Could not read ThreadX thread name pointer from target");
return retval;
}
/* Read the thread name */
retval = target_read_buffer(rtos->target,
name_ptr,
THREADX_THREAD_NAME_STR_SIZE,
(uint8_t *)&tmp_str);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread name from ThreadX target");
return retval;
}
tmp_str[THREADX_THREAD_NAME_STR_SIZE-1] = '\x00';
if (tmp_str[0] == '\x00')
strcpy(tmp_str, "No Name");
detail->thread_name_str = malloc(strlen(tmp_str)+1);
/* Read the thread status */
int64_t thread_status = 0;
retval =
target_read_buffer(rtos->target,
thread_id + param->thread_state_offset,
4,
(uint8_t *)&thread_status);
if (retval != ERROR_OK) {
LOG_ERROR("Error reading thread state from ThreadX target");
return retval;
}
for (i = 0; (i < THREADX_NUM_STATES) &&
(ThreadX_thread_states[i].value != thread_status); i++) {
/* empty */
}
char *state_desc;
if (i < THREADX_NUM_STATES)
state_desc = ThreadX_thread_states[i].desc;
else
state_desc = "Unknown state";
detail->extra_info_str = malloc(strlen(state_desc)+1);
detail->exists = true;
detail->display_str = NULL;
return 0;
}
#endif
static int ThreadX_create(struct target *target)
{
int i = 0;
while ((i < THREADX_NUM_PARAMS) &&
(0 != strcmp(ThreadX_params_list[i].target_name, target->type->name))) {
i++;
}
if (i >= THREADX_NUM_PARAMS) {
LOG_ERROR("Could not find target in ThreadX compatibility list");
return -1;
}
target->rtos->rtos_specific_params = (void *) &ThreadX_params_list[i];
target->rtos->current_thread = 0;
target->rtos->thread_details = NULL;
return 0;
}
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