OSPendSV:
MRS R0, psp //PSP is process stack pointer
CBZ R0, OSPendSV_nosave //skip register save the firsttime
SUB R0, R0, #0x20
stm r0, { r4 - r11 } // 出错了
。
。
。
。
OSPendSV_nosave:
PUSH {R14} //; need to save LR exc_return value
LDR R0, __OS_TaskSwHook //; OSTaskSwHook();
BLX R0
pop {r14} // 出错了
LDR R4, __OS_PrioCur //; OSPrioCur = OSPrioHighRdy
LDR R5, __OS_PrioHighRdy
LDRB R6, [R5]
STRB R6, [R4]
LDR R4, __OS_TCBCur //; OSTCBCur = OSTCBHighRdy;
LDR R6, __OS_TCBHighRdy
LDR R6, [R6]
STR R6, [R4]
LDR R0, [R6]
LDM R0, {R4-R11} // 出错了
ADD R0, R0, #0x20
MSR psp, R0 //; load PSP with new process SP
ORR LR, LR, #0x04 // 出错了
BX LR
NOP
以上代码在iar上编译通过但在Crossstudio for arm上出错了：错误如下：
Building “ucTest” in configuration “THUMB Flash Debug” — 4 errors
Assembling os_cpu_a.asm — 4 errors
D:/soft/lm3s/ucProg/uCOS-II/Ports/arm-cortex-m3/Generic/IAR/os_cpu_a.asm: Assembler messages:
Error: lo register required -- `stm r0,{r4-r11}'
Error: invalid register list to push/pop instruction --`pop {r14}'
Error: lo register required -- `ldm R0,{R4-R11}'
Error: unshifted register required -- `orr LR,LR,#0x04'
Build failed
有没有crossstudio for arm 关于汇编的文档啊，或者gcc关于汇编的也行，
还有gcc的主页是什么啊？ |
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