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fix: no exception information output, when the system is abnormal after holding 

the scheduling lock in SMP.

Change-Id: Idb793a5446126e638af52ff78b43bb7f8271317c
This commit is contained in:
YOUR_NAME 2021-04-25 20:16:51 +08:00
parent 806ce4eb26
commit 0ed8adfe3a
3 changed files with 49 additions and 9 deletions
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18
arch/arm/arm/include/los_hw_cpu.h
View File

@ -189,6 +189,24 @@ STATIC INLINE UINT32 ArchIntUnlock(VOID)
return intSave;
}
STATIC INLINE VOID ArchIrqDisable(VOID)
{
__asm__ __volatile__(
"cpsid i "
:
:
: "memory", "cc");
}
STATIC INLINE VOID ArchIrqEnable(VOID)
{
__asm__ __volatile__(
"cpsie i "
:
:
: "memory", "cc");
}
#else
STATIC INLINE UINT32 ArchIntLock(VOID)

38
arch/arm/arm/src/los_exc.c
View File

@ -185,18 +185,32 @@ STATIC INT32 OsDecodeDataFSR(UINT32 regDFSR)
#ifdef LOSCFG_KERNEL_VM
UINT32 OsArmSharedPageFault(UINT32 excType, ExcContext *frame, UINT32 far, UINT32 fsr)
{
PRINT_INFO("page fault entry!!!\n");
BOOL instruction_fault = FALSE;
BOOL instructionFault = FALSE;
UINT32 pfFlags = 0;
UINT32 fsrFlag;
BOOL write = FALSE;
UINT32 ret;
#ifdef LOSCFG_KERNEL_SMP
BOOL irqEnable = TRUE;
#endif
PRINT_INFO("page fault entry!!!\n");
if (OsGetSystemStatus() == OS_SYSTEM_EXC_CURR_CPU) {
return LOS_ERRNO_VM_NOT_FOUND;
}
#ifdef LOSCFG_KERNEL_SMP
irqEnable = !(LOS_SpinHeld(&g_taskSpin) && (OsPercpuGet()->taskLockCnt != 0));
if (irqEnable) {
ArchIrqEnable();
} else {
PrintExcInfo("[ERR][%s] may be held scheduler lock when entering [%s]\n",
OsCurrTaskGet()->taskName, __FUNCTION__);
}
#else
ArchIrqEnable();
#endif
if (excType == OS_EXCEPT_PREFETCH_ABORT) {
instruction_fault = TRUE;
instructionFault = TRUE;
} else {
write = !!BIT_GET(fsr, WNR_BIT);
}
@ -214,13 +228,23 @@ UINT32 OsArmSharedPageFault(UINT32 excType, ExcContext *frame, UINT32 far, UINT3
BOOL user = (frame->regCPSR & CPSR_MODE_MASK) == CPSR_MODE_USR;
pfFlags |= write ? VM_MAP_PF_FLAG_WRITE : 0;
pfFlags |= user ? VM_MAP_PF_FLAG_USER : 0;
pfFlags |= instruction_fault ? VM_MAP_PF_FLAG_INSTRUCTION : 0;
pfFlags |= instructionFault ? VM_MAP_PF_FLAG_INSTRUCTION : 0;
pfFlags |= VM_MAP_PF_FLAG_NOT_PRESENT;
return OsVmPageFaultHandler(far, pfFlags, frame);
ret = OsVmPageFaultHandler(far, pfFlags, frame);
break;
}
default:
return LOS_ERRNO_VM_NOT_FOUND;
ret = LOS_ERRNO_VM_NOT_FOUND;
break;
}
#ifdef LOSCFG_KERNEL_SMP
if (irqEnable) {
ArchIrqDisable();
}
#else
ArchIrqDisable();
#endif
return ret;
}
#endif

2
arch/arm/arm/src/los_hw_exc.S
View File

@ -205,9 +205,7 @@ _osExceptSwiHdl:
PUSH_FPU_REGS R1
MOV FP, #0 @ Init frame pointer
CPSIE I
BLX OsArmA32SyscallHandle
CPSID I
POP_FPU_REGS R1
ADD SP, SP,#4