96 lines
3.5 KiB
C
96 lines
3.5 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
// This module implements debug/trace stubs. The stub is a piece of special code which can invoked by OpenOCD
|
|
// Currently one stub is used for GCOV functionality
|
|
//
|
|
|
|
#include "eri.h"
|
|
#include "xtensa-debug-module.h"
|
|
#include "esp_dbg_stubs.h"
|
|
#include "esp_attr.h"
|
|
|
|
#if CONFIG_ESP32_DEBUG_STUBS_ENABLE
|
|
/*
|
|
Debug stubs is actually a table of 4-byte entries. Every entry is equal to zero or must contain meaningfull data.
|
|
The first entry is a service one and has the followinf format:
|
|
- tramp_addr, 4 bytes; Address of buffer for trampoline/code. Max size is ESP_DBG_STUBS_CODE_BUF_SIZE.
|
|
- min_stack_addr, 4 bytes; Start of the buffer for minimal onboard stack or data. Max size is ESP_DBG_STUBS_STACK_MIN_SIZE.
|
|
- data_alloc, 4 bytes; Address of function to allocate memory on target.
|
|
- data_free, 4 bytes; Address of function to free target memory.
|
|
This entry is used by OpenOCD code to invoke other stub entries and allocate memory for them.
|
|
*/
|
|
|
|
#define LOG_LOCAL_LEVEL CONFIG_LOG_DEFAULT_LEVEL
|
|
#include "esp_log.h"
|
|
const static char *TAG = "esp_dbg_stubs";
|
|
|
|
#define ESP_DBG_STUBS_TRAX_REG ERI_TRAX_TRIGGERPC
|
|
#define ESP_DBG_STUBS_CODE_BUF_SIZE 32
|
|
#define ESP_DBG_STUBS_STACK_MIN_SIZE 2048
|
|
|
|
#define DBG_STUB_TRAMP_ATTR IRAM_ATTR
|
|
|
|
static struct {
|
|
uint32_t tramp_addr;
|
|
uint32_t min_stack_addr; // minimal stack addr
|
|
uint32_t data_alloc;
|
|
uint32_t data_free;
|
|
} s_dbg_stubs_ctl_data;
|
|
|
|
static uint32_t s_stub_entry[ESP_DBG_STUB_ENTRY_MAX];
|
|
static uint8_t s_stub_min_stack[ESP_DBG_STUBS_STACK_MIN_SIZE];
|
|
static DBG_STUB_TRAMP_ATTR uint8_t s_stub_code_buf[ESP_DBG_STUBS_CODE_BUF_SIZE];
|
|
|
|
// TODO: all called funcs should be in IRAM to work with disabled flash cache
|
|
static void * esp_dbg_stubs_data_alloc(uint32_t size)
|
|
{
|
|
ESP_LOGV(TAG, "%s %d", __func__, size);
|
|
void *p = malloc(size);
|
|
ESP_LOGV(TAG, "%s EXIT %p", __func__, p);
|
|
return p;
|
|
}
|
|
|
|
static void esp_dbg_stubs_data_free(void *addr)
|
|
{
|
|
ESP_LOGV(TAG, "%s %p", __func__, addr);
|
|
free(addr);
|
|
ESP_LOGV(TAG, "%s EXIT %p", __func__, addr);
|
|
}
|
|
|
|
void esp_dbg_stubs_init()
|
|
{
|
|
s_dbg_stubs_ctl_data.tramp_addr = (uint32_t)s_stub_code_buf;
|
|
s_dbg_stubs_ctl_data.min_stack_addr = (uint32_t)s_stub_min_stack;
|
|
s_dbg_stubs_ctl_data.data_alloc = (uint32_t)esp_dbg_stubs_data_alloc;
|
|
s_dbg_stubs_ctl_data.data_free = (uint32_t)esp_dbg_stubs_data_free;
|
|
|
|
s_stub_entry[ESP_DBG_STUB_CONTROL_DATA] = (uint32_t)&s_dbg_stubs_ctl_data;
|
|
eri_write(ESP_DBG_STUBS_TRAX_REG, (uint32_t)s_stub_entry);
|
|
ESP_LOGV(TAG, "%s stubs %x", __func__, eri_read(ESP_DBG_STUBS_TRAX_REG));
|
|
}
|
|
|
|
esp_err_t esp_dbg_stub_entry_set(esp_dbg_stub_id_t id, uint32_t entry)
|
|
{
|
|
if (id < ESP_DBG_STUB_ENTRY_FIRST || id >= ESP_DBG_STUB_ENTRY_MAX) {
|
|
ESP_LOGE(TAG, "Invalid stub id %d!", id);
|
|
return ESP_ERR_INVALID_ARG;
|
|
}
|
|
s_stub_entry[id] = entry;
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
#endif
|