我有一个 Zynq UltraScale MPSoC,上面有一个运行 Linux 的四核 ARM Cortex。有时,有一个事件会产生 SIGBUS 错误。我在下面包含了调试分析的片段。我确信 dst 和 src 的值在合法区域内。实际访问本身是从 FPGA 内存资源到内部 ARM 内存位置的复制例程。
我在另一篇文章中读到 SIGBUS in 的原因可能是 I/O 故障。任何人都可以扩展与 ARM 相关的“I/O 故障”吗?我设想,类似于失败的总线确认。
相对于 ARM Cortex,是否存在与机器检查寄存器等效的功能,可以进一步了解 SIGBUS 的原因?
#0 ecfm_copy_table_entry_backward (dst=dst@entry=0xee189830, src=<optimized out>, num_words=num_words@entry=72) at src/software/saos-sds/ecfm_driver/ecfm_driver.c:478
#1 0xf658347c in ecfm_copy_table_entry_backward (num_words=72, src=<optimized out>, dst=0xee189830) at src/software/saos-sds/ecfm_driver/ecfm_driver.c:1186
#2 ecfm_get_rx_stats (session_id=session_id@entry=2637, stat=stat@entry=0xee189830) at src/software/saos-sds/ecfm_driver/ecfm_driver.c:1185
#3 0x011c463c in eCfmApiGetRxProcessingStats (sessionId=<optimized out>, stat=0xee1898e0) at src/software/saos-sds/leos/platform/common/src/eCfmApi.c:1836
#4 0x011d6aac in halFPGAGetStats (pPlatformData=pPlatformData@entry=0xe7f98abc, lossStats=0xee1899a8, lossStats@entry=0xee1899a0)
at src/software/saos-sds/leos/platform/common/src/halEcfmFpgaApi.c:2214
#5 0x00a71870 in cfmAgentReadHwStats (data=0xe7f98a70, role=<optimized out>, testType=<optimized out>) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmApal.c:1760
#6 0x009fd39c in cfmTestSessionSmiSmEvent (pSession=0xe7f98a70, event=event@entry=CfmTestSmiEvent_DeltaTComplete)
at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfm.c:26242
#7 0x00a75f04 in cfmApalOamFpgaSessionStatusIntHdlr (context=<optimized out>, pMsg=<optimized out>) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmApal.c:2461
#8 cfmApalOamFpgaHalY1731IntHdlr (context=<optimized out>, pMsg=0x37b7768 <__func__.44940>) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmApal.c:2548
#9 0x00a7cf04 in oamMsgDispatchMsgList (msgList=msgList@entry=0x68dfae8, pMsgContext=pMsgContext@entry=0xee189bc8)
at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/oamMsg.c:92
#10 0x00a76e50 in cfmHalDispatchMsgList (cpe=<optimized out>, msgList=msgList@entry=0x68dfae8) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmApal.c:594
#11 0x00a8f2cc in CfmAgentMsgHdlr (sig=<optimized out>) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmAgent.c:1335
#12 0x00a9045c in cfmAgentTmoHdlr (cycle=<optimized out>, extraProcTimeMs=0) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmAgent.c:1383
#13 0x00a90598 in cfmAgentMain (arg=<optimized out>) at src/software/saos-sds/leos/common/src/genericSwitch/cfm/src/cfmAgent.c:1441
#14 0x0112ea8c in thread_prologue (arg=<optimized out>) at src/software/saos-sds/leos/os/linux/src/ose_shim.c:1273
#15 0xf704af8c in start_thread (arg=0xee18a3e0) at pthread_create.c:335
#16 0xf646b0a0 in ?? () at ../sysdeps/unix/sysv/linux/arm/clone.S:89
from /localdata/perforce/ankgoyal/oneos/branches/saos-sds/dev/main/build/saos-sds/fs/eredan_tarfs/debug/eredan/armv7a/lib/libc.so.6
Backtrace stopped: previous frame identical to this frame (corrupt stack?)
(gdb) ore was generated by `/mnt/apps/bin/leos -s'.
(gdb) Program terminated with signal SIGBUS, Bus error.