WinCE 下进程可访问的代码页的地址获取

此功能是在看 TCPMP 代码时发现的，感觉以后的工作中可能用到此部分功能，所以记录下来。

#include "windef.h"  
#include "windows.h"  
/* 
 * 功能: 进程可访问的代码页 
 * 参数:  pPtr(in) 进程中一函数的指针 
            ppucMin,ppucMax(out) 输出进程可访问地址的最小/最大值 
            puiPageSize(in/out) 页面大小设置与输出 
*/  
void CodeAddrFindPages(void *pPtr,unsigned char **ppucMin,unsigned char **ppucMax,unsigned int *puiPageSize)  
{  
    unsigned char *pucMin = NULL;  
    unsigned char *pucMax = NULL;  
    unsigned int uiPageSize =   
    #if defined(MIPS)  
        1024;  
    #else  
        4096;  
    #endif  
    if(puiPageSize)  
        *puiPageSize = uiPageSize;  
  
    pucMin = pucMax = (unsigned char *)((unsigned int)pPtr & (~(uiPageSize - 1)));      // ~ 的优先级高于位操作符 &  
    // Leo: IsBadCodePtr - Determines whether the calling process has read access to the memory at the specified address.  
    while(!IsBadCodePtr((FARPROC)(pucMin - uiPageSize)))  
        pucMin -= uiPageSize;  
    while(!IsBadCodePtr((FARPROC)pucMax))  
        pucMax += uiPageSize;  
  
    *ppucMin = pucMin;  
    *ppucMax = pucMax;  
#ifdef _USE_WINDOWS_CE_PLATFORM  
    RETAILMSG(1,(L"[CodeAddr]min = 0x%X; max = 0x%X
",pucMin,pucMax));  
#else  
    printf("[CodeAddr]min = 0x%X; max = 0x%X
",pucMin,pucMax);  
#endif  
}  

运行结果：

[CodeAddr]min = 0x11000; max = 0x195000