Question

我是visualGDB的新手。最近我新建了一个stm32独立项目，任何.cpp和.c文件都可以正确编译，但是当我将μC/ OS-II迁移到项目中时，我发现os_cpu_a.s文件不能不能正确组装。错误日志显示如下：

我的Makefile标志设置为：

请给我一些建议！任何帮助将不胜感激！

os_cpu_a.s个文件内容如下所示：

;/*********************** (C) COPYRIGHT 2010 Libraworks *************************
;* File Name    : os_cpu_a.asm 
;* Author       : Librae 
;* Version      : V1.0
;* Date         : 06/10/2010
;* Description  : μCOS-II asm port  for STM32
;*******************************************************************************/

        IMPORT  OSRunning               ; External references
        IMPORT  OSPrioCur
        IMPORT  OSPrioHighRdy
        IMPORT  OSTCBCur
        IMPORT  OSTCBHighRdy
        IMPORT  OSIntNesting
        IMPORT  OSIntExit
        IMPORT  OSTaskSwHook

        EXPORT  OSStartHighRdy               
        EXPORT  OSCtxSw
        EXPORT  OSIntCtxSw
        EXPORT  OS_CPU_SR_Save                              ; Functions declared in this file
        EXPORT  OS_CPU_SR_Restore   
        EXPORT  PendSV_Handler


        NVIC_INT_CTRL       EQU     0xE000ED04  
        NVIC_SYSPRI2        EQU     0xE000ED20  
        NVIC_PENDSV_PRI     EQU     0xFFFF0000  
        NVIC_PENDSVSET      EQU     0x10000000  


        PRESERVE8 

        AREA    |.text|, CODE, READONLY
        THUMB 



;********************************************************************************************************
;                                   CRITICAL SECTION METHOD 3 FUNCTIONS
;
; Description: Disable/Enable interrupts by preserving the state of interrupts.  Generally speaking you
;              would store the state of the interrupt disable flag in the local variable 'cpu_sr' and then
;              disable interrupts.  'cpu_sr' is allocated in all of uC/OS-II's functions that need to
;              disable interrupts.  You would restore the interrupt disable state by copying back 'cpu_sr'
;              into the CPU's status register.
;
; Prototypes :     OS_CPU_SR  OS_CPU_SR_Save(void);
;                  void       OS_CPU_SR_Restore(OS_CPU_SR cpu_sr);
;
;
; Note(s)    : 1) These functions are used in general like this:
;
;                 void Task (void *p_arg)
;                 {
;                 #if OS_CRITICAL_METHOD == 3          /* Allocate storage for CPU status register */
;                     OS_CPU_SR  cpu_sr;
;                 #endif
;
;                          :
;                          :
;                     OS_ENTER_CRITICAL();             /* cpu_sr = OS_CPU_SaveSR();                */
;                          :
;                          :
;                     OS_EXIT_CRITICAL();              /* OS_CPU_RestoreSR(cpu_sr);                */
;                          :
;                          :
;                 }
;********************************************************************************************************

OS_CPU_SR_Save
    MRS     R0, PRIMASK     
    CPSID   I               
    BX      LR             

OS_CPU_SR_Restore
    MSR     PRIMASK, R0     
    BX      LR              


OSStartHighRdy
        LDR     R4, =NVIC_SYSPRI2      ; set the PendSV exception priority
        LDR     R5, =NVIC_PENDSV_PRI
        STR     R5, [R4]

        MOV     R4, #0                 ; set the PSP to 0 for initial context switch call
        MSR     PSP, R4

        LDR     R4, =OSRunning         ; OSRunning = TRUE
        MOV     R5, #1
        STRB    R5, [R4]


        LDR     R4, =NVIC_INT_CTRL     ;rigger the PendSV exception (causes context switch)
        LDR     R5, =NVIC_PENDSVSET
        STR     R5, [R4]

        CPSIE   I                      ;enable interrupts at processor level
OSStartHang
        B       OSStartHang            ;should never get here


OSCtxSw
        PUSH    {R4, R5}
        LDR     R4, =NVIC_INT_CTRL      
        LDR     R5, =NVIC_PENDSVSET
        STR     R5, [R4]
        POP     {R4, R5}
        BX      LR

OSIntCtxSw
        PUSH    {R4, R5}
        LDR     R4, =NVIC_INT_CTRL      
        LDR     R5, =NVIC_PENDSVSET
        STR     R5, [R4]
        POP     {R4, R5}
        BX      LR
        NOP



PendSV_Handler
    CPSID   I                                                   ; Prevent interruption during context switch
    MRS     R0, PSP                                            
    CBZ     R0, PendSV_Handler_Nosave                           ; Skip register save the first time

    SUBS    R0, R0, #0x20                                       ; Save remaining regs r4-11 on process stack
    STM     R0, {R4-R11}

    LDR     R1, =OSTCBCur                                       ; OSTCBCur->OSTCBStkPtr = SP;
    LDR     R1, [R1]
    STR     R0, [R1]                                            ; R0 is SP of process being switched out

                                                                ; At this point, entire context of process has been saved
PendSV_Handler_Nosave
    PUSH    {R14}                                               ; Save LR exc_return value
    LDR     R0, =OSTaskSwHook                                   ; OSTaskSwHook();
    BLX     R0
    POP     {R14}

    LDR     R0, =OSPrioCur                                      ; OSPrioCur = OSPrioHighRdy;
    LDR     R1, =OSPrioHighRdy
    LDRB    R2, [R1]
    STRB    R2, [R0]

    LDR     R0, =OSTCBCur                                       ; OSTCBCur  = OSTCBHighRdy;
    LDR     R1, =OSTCBHighRdy
    LDR     R2, [R1]
    STR     R2, [R0]

    LDR     R0, [R2]                                            ; R0 is new process SP; SP = OSTCBHighRdy->OSTCBStkPtr;
    LDM     R0, {R4-R11}                                        ; Restore r4-11 from new process stack
    ADDS    R0, R0, #0x20
    MSR     PSP, R0                                             ; Load PSP with new process SP
    ORR     LR, LR, #0x04                                       ; Ensure exception return uses process stack
    CPSIE   I
    BX      LR                                                  ; Exception return will restore remaining context

 end

顺便说一句，似乎版本中的任何中文字符都会被视为垃圾邮件防范方法？所以我必须删除代码中的所有中文注释。

* .s文件无法在visualGDB中正确汇编

0 个答案: