应用模块找不到符号表

发布于 2017-05-23 10:58:26 浏览：3217 订阅该版

[tocm]

报错内容：
```Module: can't find led1_on in kernel symbol table
Module: can't find rt_thread_delay in kernel symbol table
```

平台是STM32F767正点原子阿波罗，IAR编译主程序，icf文件已经添加keep { section RTMSymTab };
编译产生的rtthread.map文件可以找到
```__rtmsym_rt_thread_delay
                        0x0804116c      0x8  Data  Gb  thread.o [1]
__rtmsym_rt_thread_delay_name
                        0x08049cec     0x10  Data  Gb  thread.o [1]```
```__rtmsym_led1_off       0x08040a94      0x8  Data  Gb  drv_led.o [1]
__rtmsym_led1_off_name  0x0804a08c      0xc  Data  Gb  drv_led.o [1]
__rtmsym_led1_on        0x08040a8c      0x8  Data  Gb  drv_led.o [1]
__rtmsym_led1_on_name   0x0804a6d0      0x8  Data  Gb  drv_led.o [1]```
```RTMSymTab$$Base         0x0804090c            --   Gb  - Linker created -
RTMSymTab$$Limit        0x080411d4            --   Gb  - Linker created -```

模块的rtconfig.py如下
```import os
cwd = os.path.split(os.path.realpath(__file__))[0]

# RT-Thread root directory
RTT_ROOT = 'D:/rt-thread_dev/rt-thread'
BSP_ROOT = 'D:/rt-thread_dev/rt-thread/bsp/stm32f767-apollo'
# toolchains
EXEC_PATH = 'C:/Program Files (x86)/GNU Tools ARM Embedded/5.4 2016q3/bin'

if os.getenv('RTT_ROOT'): RTT_ROOT = os.getenv('RTT_ROOT')
if os.getenv('BSP_ROOT'): BSP_ROOT = os.getenv('BSP_ROOT')
if os.getenv('RTT_EXEC_PATH'): EXEC_PATH = os.getenv('RTT_EXEC_PATH')

PLATFORM = 'gcc'
PREFIX = 'arm-none-eabi-'
CC = PREFIX + 'gcc'
CXX = PREFIX + 'g++'
AS = PREFIX + 'gcc'
AR = PREFIX + 'ar'
LINK = PREFIX + 'gcc'
TARGET_EXT = 'mo'
SIZE = PREFIX + 'size'
OBJDUMP = PREFIX + 'objdump'
OBJCPY = PREFIX + 'objcopy'

DEVICE = ' -mcpu=cortex-m7'
CFLAGS = DEVICE + ' -mthumb -mlong-calls -O0 -fPIC -fno-exceptions'
AFLAGS = ' -c' + DEVICE + ' -x assembler-with-cpp'
LFLAGS = DEVICE + ' -mthumb -Wl,-z,max-page-size=0x4 -shared -fPIC -e main -nostdlib'

CPATH = ''
LPATH = ''
```
sconstruct 文件：

```import os
import sys

import rtconfig

sconstruct = File('SConstruct')
fn = sconstruct.rfile()
name = fn.name
building_dir = os.path.dirname(fn.abspath)
program_dir  = '../bin'

from rtconfig import RTT_ROOT
from rtconfig import BSP_ROOT

sys.path = sys.path + [os.path.join(RTT_ROOT, 'tools'), BSP_ROOT]
from building import *
from rtua import GetCPPPATH
from rtua import GetCPPDEFINES

Export('RTT_ROOT')
Export('BSP_ROOT')

# add target option
AddOption('--app',
  dest='app',
  nargs=1, type='string',
  action='store',
  metavar='DIR',
  help='installation prefix')

# add target option
AddOption('--type',
  dest='type',
  nargs=1, type='string',
  action='store',
  metavar='DIR',
  help='installation prefix')

if GetOption('type') == 'ext':
    linkflags = rtconfig.LFLAGS + ' -e 0'
else:
    linkflags = rtconfig.LFLAGS + ' -e main'

CPPPATH = GetCPPPATH(BSP_ROOT, RTT_ROOT)

env = Environment(tools = ['mingw'],
        AS = rtconfig.AS, ASFLAGS = rtconfig.AFLAGS,
        CC = rtconfig.CC, CCFLAGS = rtconfig.CFLAGS,
        CXX = rtconfig.CXX, AR = rtconfig.AR, ARFLAGS = '-rc',
        LINK = rtconfig.LINK, LINKFLAGS = linkflags,
        CPPPATH = CPPPATH)
env.PrependENVPath('PATH', rtconfig.EXEC_PATH)

PrepareModuleBuilding(env, RTT_ROOT, BSP_ROOT)

app = GetOption('app')
if app:
    objs = SConscript(os.path.join(app, 'D:/rt-thread_dev/rt-thread/examples/module/basicapp/SConscript'))
    TARGET = os.path.join(app , app + '.' + rtconfig.TARGET_EXT)

# build program 
    target = env.Program(TARGET, objs)
    env.Command("$TARGET", target, action = Copy(program_dir, TARGET))```

确定rt_system_module_init函数运行到了下面代码：
#elif defined (__IAR_SYSTEMS_ICC__)
    _rt_module_symtab_begin = __section_begin("RTMSymTab");
    _rt_module_symtab_end   = __section_begin("RTMSymTab");
#endif

rtua.y是自动生成的。
确定报错函数是这个
static struct rt_module *_load_shared_object(const char *name,
                                             void       *module_ptr)
求教下一步怎么查？

10 个回答

jeffwei 2017-05-23

这家伙很懒，什么也没写！

用mdk试了一下，一加载就死了：

\ | /
- RT -     Thread Operating System
 / | \     2.1.0 build May 23 2017
 2006 - 2017 Copyright by rt-thread team
found part[0], begin: 32256, size: 14.857GB
dfs initialized!
msh />psr: 0x41000000
 pc: 0xc1002ccc
 lr: 0x0800fca1
r12: 0x00000000
r03: 0x00000000
r02: 0xc1002ccd
r01: 0x00000000
r00: 0x00000000
hard fault on thread: basicapp
thread   pri  status      sp     stack size max used left tick  error
-------- ---  ------- ---------- ----------  ------  ---------- ---
basicapp  30  ready   0x00000048 0x00002000    01%   0x0000000a 000
led       12  suspend 0x00000078 0x00000100    46%   0x00000005 000
tshell    10  suspend 0x0000008c 0x00000400    20%   0x0000000a 000
tidle     31  ready   0x0000005c 0x00000200    17%   0x0000001e 000
timer      4  suspend 0x00000060 0x00000200    18%   0x00000009 000
main      10  suspend 0x00000084 0x00000800    43%   0x00000012 000

吐槽一下mdk速度问题，同样的工程，mdk编译链接要一刻钟，IAR只要一分钟。
------------------------------------------------------------------------------------
忘了一条，由于编译时报错，暂时屏蔽了LIBC代码
/* import the full stdio for printf */
#if defined(RT_USING_MODULE) && defined(__MICROLIB)
#error "[RT_USING_LIBC] Please use standard libc but not microlib."
#endif