请问这样分析下面这段反汇编代码?
捕鲸叉 2009-02-03 07:49:03 kd> uf KeQueryPerformanceCounter
hal!KeQueryPerformanceCounter:
806f474a 8bff mov edi,edi
806f474c 55 push ebp
806f474d 8bec mov ebp,esp
806f474f 5d pop ebp
806f4750 ff2538a36f80 jmp dword ptr [hal!HalpHeapStart+0xc (806fa338)]
hal!HalpPmTimerQueryPerfCount:
806f5dd0 56 push esi
806f5dd1 a1d0a06f80 mov eax,dword ptr [hal!QueryTimer (806fa0d0)]
806f5dd6 ffd0 call eax
806f5dd8 8b0dbca06f80 mov ecx,dword ptr [hal!TimerInfo+0x14 (806fa0bc)]
806f5dde 8b35c0a06f80 mov esi,dword ptr [hal!TimerInfo+0x18 (806fa0c0)]
806f5de4 03c1 add eax,ecx
806f5de6 13d6 adc edx,esi
806f5de8 8b4c2408 mov ecx,dword ptr [esp+8]
806f5dec 0bc9 or ecx,ecx
806f5dee 7504 jne hal!HalpPmTimerQueryPerfCount+0x24 (806f5df4)
hal!HalpPmTimerQueryPerfCount+0x20:
806f5df0 5e pop esi
806f5df1 c20400 ret 4
hal!HalpPmTimerQueryPerfCount+0x24:
806f5df4 8b35d4a56f80 mov esi,dword ptr [hal!PMTimerFreq (806fa5d4)]
806f5dfa 8931 mov dword ptr [ecx],esi
806f5dfc c7410400000000 mov dword ptr [ecx+4],0
806f5e03 5e pop esi
806f5e04 c20400 ret 4
上面的jmp dword ptr [hal!HalpHeapStart+0xc (806fa338)]是什么意思?跳到另一个函数不是起点的地方?