cmbackTrace 测试

发布于 2019-10-16 11:53:00 浏览：1747 订阅该版

使用rtthread 3.1.x的版本，芯片型号为STM32F103VET6，cmbackTrace模块 测试cm_test DIVBYZERO 指令。
没有使用bootload的情况下：测试是正常的；
用bootload的情况下：测试是不对的，测试打印输出；
msh >cmb_test DIVBYZEROthread pri  status      sp     stack size max used left tick  error------ ---  ------- ---------- ----------  ------  ---------- ---tshell  20  ready   0x00000084 0x00001000    04%   0x00000007 000tidle   31  ready   0x00000044 0x00000100    32%   0x0000000e 000main    10  suspend 0x00000080 0x00000800    11%   0x00000009 000Firmware name: rtthread, hardware version: 1.0, software version: 1.0Fault on interrupt or bare metal(no OS) environment===== Thread stack information =====  addr: 20000ee8    data: 08024172  addr: 20000eec    data: 21000000======================================================= Registers information ====================  R0 : 0802a539  R1 : fffffffd  R2 : 20000ef0  R3 : 10000000  R12: f0f00000  LR : 00000020  PC : 0802af6b  PSR: 08024173==============================================================Usage fault is caused by Indicates a divide by zero has taken place (can be set                                                 only if DIV_0_TRP is set)Show more call stack info by run: addr2line -e rtthread.axf -a -f 0802af6b
用env软件，定位Administrator@Pc-201910031524 E:\0_Footloose\0_ProCode\footloose_rtt3.1\bsp\stm32f103_footloose\build$ addr2line -e rtthread.axf -a -f 0802af6b0x0802af6brt_serial_read
E:\0_Footloose\0_ProCode\footloose_rtt3.1\bsp\stm32f103_footloose/..\..\components\drivers\serial\serial.c:797
在cm_backtrace_fault(uint32_t fault_handler_lr, uint32_t fault_handler_sp)中   on_thread_before_fault = fault_handler_lr & (1UL << 2);
    /* check which stack was used before (MSP or PSP) */有这个MSP和PSP的区分，在rtthread系统中，是怎么进行切换的？