| 摘要 |
PURPOSE: A method for searching a defect generation history of a memory management unit in a mobile communication exchange is provided to improve a debugging environment by tracking easily a cause of a defect of an MMU(Memory Management Unit). CONSTITUTION: A stack start/end address and a text end address(ssa/sea) are obtained by using TCB information when a defect of an MMU is generated(101-102). A frame pointer(fp) is obtained before a fault is generated(103-104). A physical address(pfp) of fp is obtained according to fp<ssa or fp>ssa(105-106). A call address(cad) is obtained by using the pfp when i=0 if not the pfp=0(107-109). A value of the cad is displayed if not cad<0 or cad>0, the pfp is used, and an address(nfp) stored in the next frame pointer is obtained from the next stack(110-112). A physical address(npfp) of the nfp is obtained if not nfp<ssa or nfp>sea(113-114). An npf and pfp size(len) are obtained and contents of the stack are displayed as much as the len if not npfp=0(115-117). The cad is obtained if i<4. |
