续上回，修改Makefile，将ESPIDF_LWIP_O也编入静态库中
staticlib:
$(ECHO) "LIB micropython lib"
# $(Q)$(AR) rsc $(BUILD)/libmicropython.a $(OBJ)
$(Q)$(AR) rsc $(BUILD)/libmicropython.a $(OBJ) $(ESPIDF_LWIP_O:%.o=build-GENERIC%.o)
将libmicropython.a链接到pio中时发现一些函数出现重复定义,pio已经将lwip编译成静态库了。
分别查看micropython repo中编译的liblwip.a和pio编译的liblwip.a的符号表
$ readelf -s liblwip.a | grep "pppapi" -C 10
micropython repo中的结果：
File: liblwip.a(pppapi.o)
Symbol table '.symtab' contains 59 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 FILE LOCAL DEFAULT ABS pppapi.c
2: 00000000 0 SECTION LOCAL DEFAULT 29
3: 00000000 0 SECTION LOCAL DEFAULT 30
4: 00000000 0 SECTION LOCAL DEFAULT 31
5: 00000000 0 SECTION LOCAL DEFAULT 32
6: 00000000 18 FUNC LOCAL DEFAULT 32 pppapi_do_ppp_set_default
7: 00000000 0 SECTION LOCAL DEFAULT 34
8: 00000000 22 FUNC LOCAL DEFAULT 34 pppapi_do_ppp_set_auth
9: 00000000 0 SECTION LOCAL DEFAULT 36
10: 00000000 23 FUNC LOCAL DEFAULT 36 pppapi_do_pppos_create
11: 00000000 0 SECTION LOCAL DEFAULT 38
12: 00000000 19 FUNC LOCAL DEFAULT 38 pppapi_do_ppp_connect
13: 00000000 0 SECTION LOCAL DEFAULT 40
14: 00000000 19 FUNC LOCAL DEFAULT 40 pppapi_do_ppp_close
15: 00000000 0 SECTION LOCAL DEFAULT 42
16: 00000000 17 FUNC LOCAL DEFAULT 42 pppapi_do_ppp_free
17: 00000000 0 SECTION LOCAL DEFAULT 44
18: 00000000 21 FUNC LOCAL DEFAULT 44 pppapi_do_ppp_ioctl
19: 00000000 0 SECTION LOCAL DEFAULT 46
20: 00000000 0 SECTION LOCAL DEFAULT 48
21: 00000000 0 SECTION LOCAL DEFAULT 50
22: 00000000 0 SECTION LOCAL DEFAULT 52
23: 00000000 0 SECTION LOCAL DEFAULT 54
24: 00000000 0 SECTION LOCAL DEFAULT 56
25: 00000000 0 SECTION LOCAL DEFAULT 58
26: 00000000 0 SECTION LOCAL DEFAULT 1
27: 00000000 0 SECTION LOCAL DEFAULT 3
28: 00000000 0 SECTION LOCAL DEFAULT 5
--
41: 00000000 0 SECTION LOCAL DEFAULT 61
42: 00000000 0 SECTION LOCAL DEFAULT 62
43: 00000000 0 SECTION LOCAL DEFAULT 64
44: 00000000 0 NOTYPE GLOBAL DEFAULT UND netif_set_default
45: 00000000 0 NOTYPE GLOBAL DEFAULT UND ppp_set_auth
46: 00000000 0 NOTYPE GLOBAL DEFAULT UND pppos_create
47: 00000000 0 NOTYPE GLOBAL DEFAULT UND ppp_connect
48: 00000000 0 NOTYPE GLOBAL DEFAULT UND ppp_close
49: 00000000 0 NOTYPE GLOBAL DEFAULT UND ppp_free
50: 00000000 0 NOTYPE GLOBAL DEFAULT UND ppp_ioctl
51: 00000000 21 FUNC GLOBAL DEFAULT 46 pppapi_set_default
52: 00000000 0 NOTYPE GLOBAL DEFAULT UND tcpip_api_call
53: 00000000 26 FUNC GLOBAL DEFAULT 48 pppapi_set_auth
54: 00000000 30 FUNC GLOBAL DEFAULT 50 pppapi_pppos_create
55: 00000000 25 FUNC GLOBAL DEFAULT 52 pppapi_connect
56: 00000000 25 FUNC GLOBAL DEFAULT 54 pppapi_close
57: 00000000 21 FUNC GLOBAL DEFAULT 56 pppapi_free
58: 00000000 26 FUNC GLOBAL DEFAULT 58 pppapi_ioctl
pio中的结果：
File: liblwip.a(pppapi.c.o)
Symbol table '.symtab' contains 12 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 FILE LOCAL DEFAULT ABS pppapi.c
2: 00000000 0 SECTION LOCAL DEFAULT 1
3: 00000000 0 SECTION LOCAL DEFAULT 2
4: 00000000 0 SECTION LOCAL DEFAULT 3
5: 00000000 0 SECTION LOCAL DEFAULT 4
6: 00000000 0 SECTION LOCAL DEFAULT 6
7: 00000000 0 SECTION LOCAL DEFAULT 7
8: 00000000 0 SECTION LOCAL DEFAULT 9
9: 00000000 0 SECTION LOCAL DEFAULT 10
10: 00000000 0 SECTION LOCAL DEFAULT 11
11: 00000000 0 SECTION LOCAL DEFAULT 12
显然是没编译pppapi.h中定义的api
查阅相关文件
C:\Users\rui.platformio\packages\framework-espidf\components\lwip\lwip\src\include\netif\ppp\pppapi.h
#include "netif/ppp/ppp_opts.h"
#if LWIP_PPP_API /* don't build if not configured for use in lwipopts.h */
...
/* API for application */
err_t pppapi_set_default(ppp_pcb *pcb);
#if ESP_PPP && PPP_AUTH_SUPPORT
void pppapi_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd);
#endif
#if PPP_NOTIFY_PHASE
err_t pppapi_set_notify_phase_callback(ppp_pcb *pcb, ppp_notify_phase_cb_fn notify_phase_cb);
#endif /* PPP_NOTIFY_PHASE */
#if PPPOS_SUPPORT
ppp_pcb *pppapi_pppos_create(struct netif *pppif, pppos_output_cb_fn output_cb, ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
#endif /* PPPOS_SUPPORT */
#if PPPOE_SUPPORT
ppp_pcb *pppapi_pppoe_create(struct netif *pppif, struct netif *ethif, const char *service_name,
const char *concentrator_name, ppp_link_status_cb_fn link_status_cb,
void *ctx_cb);
#endif /* PPPOE_SUPPORT */
#if PPPOL2TP_SUPPORT
ppp_pcb *pppapi_pppol2tp_create(struct netif *pppif, struct netif *netif, ip_addr_t *ipaddr, u16_t port,
const u8_t *secret, u8_t secret_len,
ppp_link_status_cb_fn link_status_cb, void *ctx_cb);
#endif /* PPPOL2TP_SUPPORT */
err_t pppapi_connect(ppp_pcb *pcb, u16_t holdoff);
#if PPP_SERVER
err_t pppapi_listen(ppp_pcb *pcb);
#endif /* PPP_SERVER */
err_t pppapi_close(ppp_pcb *pcb, u8_t nocarrier);
err_t pppapi_free(ppp_pcb *pcb);
err_t pppapi_ioctl(ppp_pcb *pcb, u8_t cmd, void *arg);
#ifdef __cplusplus
}
#endif
#endif /* LWIP_PPP_API */
跳过本部分===
C:\Users\rui.platformio\packages\framework-espidf\components\lwip\lwip\src\include\netif\ppp\ppp_opts.h
#ifndef PPP_SUPPORT
#define PPP_SUPPORT 0
#endif
...
/**
* LWIP_PPP_API==1: Enable PPP API (in pppapi.c)
*/
#ifndef LWIP_PPP_API
#define LWIP_PPP_API (PPP_SUPPORT && (NO_SYS == 0))
#endif
C:\Users\rui.platformio\packages\framework-espidf\components\lwip\port\esp32\include\lwipopts.h
/*
---------------------------------
---------- PPP options ----------
---------------------------------
*/
/**
* PPP_SUPPORT==1: Enable PPP.
*/
// #define PPP_SUPPORT CONFIG_LWIP_PPP_SUPPORT
#define PPP_SUPPORT 1
MicroPython repo中sdkconfig.base中似乎可以设置是否启用PPP
# UDP
CONFIG_LWIP_PPP_SUPPORT=y
CONFIG_LWIP_PPP_PAP_SUPPORT=y
CONFIG_LWIP_PPP_CHAP_SUPPORT=y
pio中没找到相关文件，只有自动生成的sdkconfig.h，对应Makefile中
$(SDKCONFIG_H): $(SDKCONFIG_COMBINED)
$(ECHO) "GEN $@"
$(Q)$(MKDIR) -p $(dir $@)
$(Q)$(PYTHON) $(ESPIDF)/tools/kconfig_new/confgen.py \
--output header $@ \
--config $< \
--kconfig $(ESPIDF)/Kconfig \
--env "IDF_TARGET=esp32" \
--env "IDF_CMAKE=n" \
--env "COMPONENT_KCONFIGS=$(ESPCOMP_KCONFIGS)" \
--env "COMPONENT_KCONFIGS_PROJBUILD=$(ESPCOMP_KCONFIGS_PROJBUILD)" \
--env "IDF_PATH=$(ESPIDF)"
$(Q)touch $@
在Makefile中去掉network_ppp.c，同时在modnetwork.c中去掉报错的那一行
STATIC const mp_rom_map_elem_t mp_module_network_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_network) },
{ MP_ROM_QSTR(MP_QSTR___init__), MP_ROM_PTR(&esp_initialize_obj) },
{ MP_ROM_QSTR(MP_QSTR_WLAN), MP_ROM_PTR(&get_wlan_obj) },
#if !MICROPY_ESP_IDF_4
{ MP_ROM_QSTR(MP_QSTR_LAN), MP_ROM_PTR(&get_lan_obj) },
#endif
// { MP_ROM_QSTR(MP_QSTR_PPP), MP_ROM_PTR(&ppp_make_new_obj) },
{ MP_ROM_QSTR(MP_QSTR_phy_mode), MP_ROM_PTR(&esp_phy_mode_obj) },
至此pio中编译剩余两个FreeRTOS相关错误xQueueCreateMutexStatic。
在C:\Users\rui\Documents\Data\Code\PlatformIO\MicroPythonEmbedded.pio\build\firebeetle32\config\sdkconfig.h添加
...
#define CONFIG_FREERTOS_TASK_FUNCTION_WRAPPER 1
#define CONFIG_FREERTOS_CHECK_MUTEX_GIVEN_BY_OWNER 1
#define CONFIG_FREERTOS_DEBUG_OCDAWARE 1
// added line
#define CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION 1
// added line
#define CONFIG_HEAP_POISONING_DISABLED 1
#define CONFIG_HEAP_TRACING_OFF 1
#define CONFIG_LOG_DEFAULT_LEVEL_INFO 1
#define CONFIG_LOG_DEFAULT_LEVEL 3
...
====================================================================
发现上面这些东西可以直接通过改pio project目录下的sdkconfig搞定 添加下面几行
# PPPoS
CONFIG_LWIP_PPP_SUPPORT=y
CONFIG_LWIP_PPP_PAP_SUPPORT=y
CONFIG_LWIP_PPP_CHAP_SUPPORT
# FreeRTOS
CONFIG_FREERTOS_SUPPORT_STATIC_ALLOCATION=y
成功链接，报flash空间不足，暂时先不删除功能，直接改分区表
# Name, Type, SubType, Offset, Size, Flags
# Note: if you have increased the bootloader size, make sure to update the offsets to avoid overlap
nvs, data, nvs, , 0x6000,
phy_init, data, phy, , 0x1000,
factory, app, factory, 0x10000, 0x180000,
烧录进入esp32打开串口调试后报错。
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x400da13a PS : 0x00060930 A0 : 0x800d2744 A1 : 0x3ffbc360
A2 : 0x3ffbc380 A3 : 0x00000000 A4 : 0x3ffb46dc A5 : 0xffffffff
A6 : 0x3ffaffac A7 : 0x3ffbe45c A8 : 0x800da13a A9 : 0x3ffbc340
A10 : 0x00000000 A11 : 0x00000000 A12 : 0x0000041e A13 : 0x3ffbf0c6
A14 : 0x00000000 A15 : 0x00000041 SAR : 0x0000001f EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000010 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0x00000000
查看官方文档的解释
Guru Meditation 错误
本节将对打印在 Guru Meditation Error: Core panic'ed 后面括号中的致错原因进行逐一解释。
...
LoadProhibited, StoreProhibited
当应用程序尝试读取或写入无效的内存位置时，会发生此类 CPU 异常。此类无效内存地址可以在寄存器转储的 EXCVADDR 中找到。如果该地址为零，通常意味着应用程序正尝试解引用一个 NULL 指针。如果该地址接近于零，则通常意味着应用程序尝试访问某个结构体的成员，但是该结构体的指针为 NULL。如果该地址是其它非法值（不在 0x3fxxxxxx - 0x6xxxxxxx 的范围内），则可能意味着用于访问数据的指针未初始化或者已经损坏。
尝试debug报错Target disconnected.: Not a directory
把OpenOCD换成最新的release，debug恢复正常
debug发现每次都在.platformio/packages/framework-espidf/components/esp32/pm_esp32.c中卡住
/* Configure all modes to use the default CPU frequency.
* This will be modified later by a call to esp_pm_configure.
*/
rtc_cpu_freq_config_t default_config;
if (!rtc_clk_cpu_freq_mhz_to_config(CONFIG_ESP32_DEFAULT_CPU_FREQ_MHZ, &default_config)) {
assert(false && "unsupported frequency");
}
for (size_t i = 0; i < PM_MODE_COUNT; ++i) {
// =======================
s_cpu_freq_by_mode[i] = default_config;
// =======================
}
}
每次执行mp_init()函数，点step into直接停在pm_esp32.c的s_cpu_freq_by_mode[i] = default_config;这一行，因为没有.c文件。
貌似这段代码是在抛异常，应该和micropython无关。没法单步调试的话可能要根据call stack找问题出处。
在pio project的main.c中调用mp_init和execute_from_str都会报错，debug会定位到上面说的那行代码。execute_from_str代码如下
mp_obj_t execute_from_str(const char *str)
{
nlr_buf_t nlr;
// ===============================
if (nlr_push(&nlr) == 0)
// ===============================
{
qstr src_name = 1 /*MP_QSTR_*/;
mp_lexer_t *lex = mp_lexer_new_from_str_len(src_name, str, strlen(str), false);
mp_parse_tree_t pt = mp_parse(lex, MP_PARSE_FILE_INPUT);
mp_obj_t module_fun = mp_compile(&pt, src_name, false);
mp_call_function_0(module_fun);
nlr_pop();
return 0;
}
else
{
// uncaught exception
return (mp_obj_t)nlr.ret_val;
}
}
执行到nlr_push时会报错。nlr_push代码如下：
void nlr_pop(void) {
nlr_buf_t **top = &MP_STATE_THREAD(nlr_top);
*top = (*top)->prev;
}
很可能是MP_STATE_THREAD引起的错误，这是py/mpstate.h中定义的宏
extern mp_state_ctx_t mp_state_ctx;
#define MP_STATE_VM(x) (mp_state_ctx.vm.x)
#define MP_STATE_MEM(x) (mp_state_ctx.mem.x)
#if MICROPY_PY_THREAD
extern mp_state_thread_t *mp_thread_get_state(void);
#define MP_STATE_THREAD(x) (mp_thread_get_state()->x)
#else
#define MP_STATE_THREAD(x) (mp_state_ctx.thread.x)
#endif
mp_init()中调用了MP_STATE_VM，猜想是mp_state_ctx的问题
查看符号表
$ readelf -s libmicropython.a | grep "mp_state_ctx" -C 50
File: libmicropython.a(mpstate.o)
Symbol table '.symtab' contains 8 entries:
Num: Value Size Type Bind Vis Ndx Name
0: 00000000 0 NOTYPE LOCAL DEFAULT UND
1: 00000000 0 FILE LOCAL DEFAULT ABS mpstate.c
2: 00000000 0 SECTION LOCAL DEFAULT 1
3: 00000000 0 SECTION LOCAL DEFAULT 2
4: 00000000 0 SECTION LOCAL DEFAULT 3
5: 00000000 0 SECTION LOCAL DEFAULT 4
6: 00000000 0 SECTION LOCAL DEFAULT 5
7: 00000004 816 OBJECT GLOBAL DEFAULT COM mp_state_ctx
查了一下Ndx列的含义
Ndx列表明每个符号所在的段，其中有三个伪段(pseudo section):ABS表示不该被重定位的符号，UNDEF表示在本模块引用，却在其他模块定义，COMMON表示还未分配位置的未初始化对象。
然后再次查询
$ readelf -s libmicropython.a | grep "mp_state_ctx"
7: 00000004 816 OBJECT GLOBAL DEFAULT COM mp_state_ctx
52: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
39: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
32: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
342: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
186: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
118: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
24: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
96: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
34: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
50: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
157: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
42: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
65: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
47: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
74: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
20: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
22: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
76: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
86: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
22: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
21: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
49: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
67: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
94: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
116: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
150: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
54: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
36: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
49: 00000000 0 NOTYPE GLOBAL DEFAULT UND mp_state_ctx
除了mpstate.o中是COM其他出现mp_state_ctx的地方都是UND，很有可能是mp_state_ctx没初始化的问题。
如果执行的是mp_init错误是LoadProhibited，EXCVADDR: 0x00000008，如果直接执行execute_from_str错误是StoreProhibited，EXCVADDR: 0x00000010。
直接写micropython repo中main.c的代码会在mp_stack_set_top((void *)sp);抛异常，EXCVADDR: 0x00000000
mp_stack_set_top的具体实现：
void mp_stack_set_top(void *top) {
MP_STATE_THREAD(stack_top) = top;
}
看一下mp_state_ctx的组成
typedef struct _mp_state_ctx_t {
mp_state_thread_t thread;
mp_state_vm_t vm;
mp_state_mem_t mem;
} mp_state_ctx_t;
mp_state_thread_t
typedef struct _mp_state_thread_t {
// Stack top at the start of program
char *stack_top;
#if MICROPY_STACK_CHECK
size_t stack_limit;
#endif
#if MICROPY_ENABLE_PYSTACK
uint8_t *pystack_start;
uint8_t *pystack_end;
uint8_t *pystack_cur;
#endif
////////////////////////////////////////////////////////////
// START ROOT POINTER SECTION
// Everything that needs GC scanning must start here, and
// is followed by state in the mp_state_vm_t structure.
//
mp_obj_dict_t *dict_locals;
mp_obj_dict_t *dict_globals;
nlr_buf_t *nlr_top;
#if MICROPY_PY_SYS_SETTRACE
mp_obj_t prof_trace_callback;
bool prof_callback_is_executing;
struct _mp_code_state_t *current_code_state;
#endif
} mp_state_thread_t;
似乎都是对mp_state_ctx操作引起了问题，非常神秘。
然后我试着调用了一下结构体里面其他几个成员如stack_limit, dict_locals, dict_globals,
void *p = MP_STATE_THREAD(dict_globals);
printf("0x%d\n", (unsigned int)p);
EXCVADDR的地址貌似都对的上，都差0x4，基本确定是mp_state_ctx存在问题，但不一定只是mp_state_ctx存在问题。
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