我是visualGDB的新手。最近新建了一个stm32单机项目，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，发现os_cpu_a.s文件无法正确组装。错误日志如下所示：
我的Makefile标志设置是：
请给我一些建议！任何帮助将不胜感激！
os_cpu_a.s文件内容如下图所示：
;/*********************** (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作为防止垃圾邮件的方法？所以我必须删除我代码中的所有中文注释。