This code appears to be a function implemented for the...

February 4, 2025 at 03:28 PM

void mapFileAndPrintSize(LPCSTR param_1,undefined8 param_2,undefined8 param_3,undefined8 param_4)

{
  undefined8 uVar1;
  undefined8 uVar2;
  undefined4 local_28;
  undefined4 uStack_24;
  undefined4 uStack_20;
  undefined4 uStack_1c;
  undefined local_18 [24];
  
                    /* 0x2180  17  mapFileAndPrintSize */
  uVar2 = 1;
  local_28 = 0xffffffff;
  uStack_24 = 0xffffffff;
  uStack_20 = 0;
  uStack_1c = 0;
  local_18._0_16_ = ZEXT816(0);
  uVar1 = FUN_140002070((HANDLE *)&local_28,param_1,1);
  if ((int)uVar1 == 0) {
    printf_140002560("Failed!\n",param_1,uVar2,param_4);
  }
  else {
    printf_140002560("Size %d, at %p\n",(ulonglong)(uint)local_18._8_4_,local_18._0_8_,param_4);
  }
  if ((LPCVOID)local_18._0_8_ != (LPCVOID)0x0) {
    UnmapViewOfFile((LPCVOID)local_18._0_8_);
  }
  if ((HANDLE)CONCAT44(uStack_1c,uStack_20) != (HANDLE)0x0) {
    CloseHandle((HANDLE)CONCAT44(uStack_1c,uStack_20));
  }
  if ((HANDLE)CONCAT44(uStack_24,local_28) != (HANDLE)0x0) {
    CloseHandle((HANDLE)CONCAT44(uStack_24,local_28));
  }
  return;
}

This code appears to be a function implemented for the Windows operating system, involving the manipulation of file mapping and working with handles. Here's a breakdown of what the code does:

Initialization and Variable Setup:
- The function initializes a set of local variables with specific default values (e.g., local_28 = 0xffffffff).
- local_18 is likely a structure or buffer that gets initialized to zero.
Calling the FUN_140002070 function:
- The function calls FUN_140002070 with references to local_28 (and related variables), param_1 (likely a file path or filename), and a 1 as other arguments.
- We don't have the implementation of FUN_140002070, but judging by context, it seems to involve opening a file/mapping it into memory, and filling local_18 with details about the file, potentially file size or file location.
Checking the Status of the Operation:
- After calling FUN_140002070, the code checks the return value uVar1. If the value is 0, it indicates a failure, and a formatted error message is printed using printf_140002560.
Successful Mapping Case:
- If FUN_140002070 succeeds (uVar1 != 0), the code prints information about the mapped file.
- Specifically:
  - The size of the file is extracted from the local_18 structure (likely at an offset of 8, based on local_18._8_4_).
  - The base memory address where the file was mapped is also extracted (using local_18._0_8_).
  - A success message is printed using printf_140002560.
Cleanup:
- If a file was successfully mapped into memory (local_18._0_8_ is not 0), it is unmapped with the UnmapViewOfFile function.
- If there are valid file or mapping handles (uStack_1c, uStack_20), they are closed using CloseHandle.
- The same is done for other handles (local_28, uStack_24) if they were opened.
Return:
- The function cleans up resources and returns.

What Does This Function Do?

Purpose: This function attempts to map a file into memory, prints its size and memory address if successful, and cleans up resources afterward.
If the mapping fails, it prints an error message.
It uses a helper function (FUN_140002070) to open/map the file and Windows API functions such as UnmapViewOfFile and CloseHandle to manage resources.

Assumptions

FUN_140002070 is a custom function for file opening/mapping.
printf_140002560 is a custom function for formatted output, similar to printf, but possibly with extra functionality for parameter handling.

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