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Fixed DOS EXE loader for the case where we realy have only 4 bytes on 

the last page of the exe.
This commit is contained in:
Michael Stefaniuc 2004-01-20 01:25:17 +00:00 committed by Alexandre Julliard
parent 998e1520dd
commit f44b5c46e8
1 changed files with 9 additions and 2 deletions
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11
dlls/winedos/module.c
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@ -232,6 +232,9 @@ static BOOL MZ_DoLoadImage( HANDLE hFile, LPCSTR filename, OverlayBlock *oblk )
/* calculate load size */
image_start=mz_header.e_cparhdr<<4;
image_size=mz_header.e_cp<<9; /* pages are 512 bytes */
/* From Ralf Brown Interrupt List: If the word at offset 02h is 4, it should
* be treated as 00h, since pre-1.10 versions of the MS linker set it that
* way. */
if ((mz_header.e_cblp!=0)&&(mz_header.e_cblp!=4)) image_size-=512-mz_header.e_cblp;
image_size-=image_start;
min_size=image_size+((DWORD)mz_header.e_minalloc<<4)+(PSP_SIZE<<4);
@ -274,8 +277,12 @@ static BOOL MZ_DoLoadImage( HANDLE hFile, LPCSTR filename, OverlayBlock *oblk )
TRACE("loading DOS %s image, %08lx bytes\n",old_com?"COM":"EXE",image_size);
SetFilePointer(hFile,image_start,NULL,FILE_BEGIN);
if (!ReadFile(hFile,load_start,image_size,&len,NULL) || len != image_size) {
SetLastError(ERROR_BAD_FORMAT);
goto load_error;
/* check if this is due to the workaround for the pre-1.10 MS linker and we
realy had only 4 bytes on the last page */
if (mz_header.e_cblp != 4 || image_size - len != 512 - 4) {
SetLastError(ERROR_BAD_FORMAT);
goto load_error;
}
}
if (mz_header.e_crlc) {