（高手请进）编译之后，为什么不能在机器码中找到源代码中对应的部分。

04616115 2007-8-5 17:49 楼主

cpu：PowerPC。
源代码中有一函数：REX_Thread::LockContext();
正常情况下，编译之后为：bl 0x......(上述函数的地址）
但下面这个函数（请看代码一）很奇怪，编译之后根本找不到bl指令，而且我在源代码中添加一些测试代码后（请看代码二），编译出来的指令序列还是一样。
代码一：
MicrosecondsType  DCRCLASS::StopRLPFwdBufferGuardTimer()
{
MicrosecondsType  remainingTime = 0;
//This method is frequently called when the timer is already stopped
if ( RLPFwdBufferGuardTimerPtr != NULL )
{
   REX_Thread::LockContext();
   REXCALLB *tempRLPFwdBufferGuardTimerPtr = RLPFwdBufferGuardTimerPtr;
   if ( RLPFwdBufferGuardTimerPtr != NULL )
   {
      RLPFwdBufferGuardTimerPtr = NULL;
      remainingTime = tempRLPFwdBufferGuardTimerPtr->Stop();
   }
   REX_Thread::UnlockContext();
   delete tempRLPFwdBufferGuardTimerPtr;
}
return remainingTime;
}

代码二：
MicrosecondsType  DCRCLASS::StopRLPFwdBufferGuardTimerPV()
{
MicrosecondsType  remainingTime = 0;
//This method is frequently called when the timer is already stopped
if ( RLPFwdBufferGuardTimerPtr != NULL )
{
   Eric_Temp = 0xab4;
   REX_Thread::LockContext();
   Eric_Temp = 0xab5;
   REXCALLB *tempRLPFwdBufferGuardTimerPtr = RLPFwdBufferGuardTimerPtr;
   if ( RLPFwdBufferGuardTimerPtr != NULL )
   {
      RLPFwdBufferGuardTimerPtr = NULL;
      remainingTime = tempRLPFwdBufferGuardTimerPtr->Stop();
   }
   Eric_Temp = 0xab6;
   REX_Thread::UnlockContext();
   Eric_Temp = 0xab7;
   Eric_Temp = 0xab8;
   Eric_Temp = 0xab9;
   Eric_Temp = 0xaba;
   Eric_Temp = 0xabb;
   Eric_Temp = 0xabc;
   Eric_Temp = 0xabd;
   Eric_Temp = 0xabe;
   Eric_Temp = 0xabf;
   delete tempRLPFwdBufferGuardTimerPtr;
}

Cao_Temp = Eric_Temp;
return remainingTime;
}

指令序列：
StopRLPFwdBufferGuardTimerPV__8DCRCLASSFv:
0x18bbca0  7c0802a6 mfspr    r0,LR
0x18bbca4  9421ffe8 stwu       r1,-24(r1)
0x18bbca8  93e10014 stw       r31,20(r1)
0x18bbcac  93c10010 stw       r30,16(r1)
0x18bbcb0  93a1000c stw       r29,12(r1)
0x18bbcb4  9001001c stw       r0,28(r1)
0x18bbcb8  7c7d1b78 or       r29,r3,r3
0x18bbcbc  801d0154 lwz       r0,340(r29)
0x18bbcc0  28000000 cmpli    crf0,0,r0,0x0 # 0
0x18bbcc4  3be00000 li       r31,0x0 # 0
0x18bbcc8  41820098 bc       0xc,2, 0x18bbd60 # 0x018bbd60
0x18bbccc  3d800043 lis       r12,0x43 # 67
0x18bbcd0  398ca150 addi       r12,r12,0xa150 # -24240
0x18bbcd4  7d8903a6 mtspr    CTR,r12
0x18bbcd8  4e800421 bcctrl    0x14,0
0x18bbcdc  28030000 cmpli    crf0,0,r3,0x0 # 0
0x18bbce0  40820014 bc       0x4,2, 0x18bbcf4 # 0x018bbcf4
0x18bbce4  3d800022 lis       r12,0x22 # 34
0x18bbce8  398c5c98 addi       r12,r12,0x5c98 # 23704
0x18bbcec  7d8903a6 mtspr    CTR,r12
0x18bbcf0  4e800421 bcctrl    0x14,0
0x18bbcf4  83dd0154 lwz       r30,340(r29)
0x18bbcf8  281e0000 cmpli    crf0,0,r30,0x0 # 0
0x18bbcfc  41820024 bc       0xc,2, 0x18bbd20 # 0x018bbd20
0x18bbd00  3d8001b3 lis       r12,0x1b3 # 435
0x18bbd04  398ca4c8 addi       r12,r12,0xa4c8 # -23352
0x18bbd08  38000000 li       r0,0x0 # 0
0x18bbd0c  7d8903a6 mtspr    CTR,r12
0x18bbd10  901d0154 stw       r0,340(r29)
0x18bbd14  7fc3f378 or       r3,r30,r30
0x18bbd18  4e800421 bcctrl    0x14,0
0x18bbd1c  7c7f1b78 or       r31,r3,r3
0x18bbd20  3d800043 lis       r12,0x43 # 67
0x18bbd24  398ca150 addi       r12,r12,0xa150 # -24240
0x18bbd28  7d8903a6 mtspr    CTR,r12
0x18bbd2c  4e800421 bcctrl    0x14,0
0x18bbd30  28030000 cmpli    crf0,0,r3,0x0 # 0
0x18bbd34  40820014 bc       0x4,2, 0x18bbd48 # 0x018bbd48
0x18bbd38  3d800022 lis       r12,0x22 # 34
0x18bbd3c  398c5cbc addi       r12,r12,0x5cbc # 23740
0x18bbd40  7d8903a6 mtspr    CTR,r12
0x18bbd44  4e800421 bcctrl    0x14,0
0x18bbd48  3d8001b3 lis       r12,0x1b3 # 435
0x18bbd4c  398ca0b4 addi       r12,r12,0xa0b4 # -24396
0x18bbd50  7d8903a6 mtspr    CTR,r12
0x18bbd54  7fc3f378 or       r3,r30,r30
0x18bbd58  38800003 li       r4,0x3 # 3
0x18bbd5c  4e800421 bcctrl    0x14,0
0x18bbd60  8001001c lwz       r0,28(r1)
0x18bbd64  83a1000c lwz       r29,12(r1)
0x18bbd68  7c0803a6 mtspr    LR,r0
0x18bbd6c  83c10010 lwz       r30,16(r1)
0x18bbd70  7fe3fb78 or       r3,r31,r31
0x18bbd74  83e10014 lwz       r31,20(r1)
0x18bbd78  38210018 addi       r1,r1,0x18 # 24
0x18bbd7c  4e800020 blr