author Sam Lantinga <>
Thu, 16 May 2013 00:43:22 -0700
changeset 7180 3733e68edbc3
parent 6878 30579e86ac24
permissions -rw-r--r--
Fixed bug 1846 - _allmul implementation in SDL_stdlib.c doesn't clean up the stack

Colin Barrett

I see this manifest itself (VS2012 x86) as:

"Run-Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declared with a different calling convention."

in the first call to SDL_GetTicks in my application. The disassembly at the problem line is:

hires_now.QuadPart *= 1000;
00AD0792 push 0
00AD0794 push 3E8h
00AD0799 mov eax,dword ptr [ebp-10h]
00AD079C push eax
00AD079D mov ecx,dword ptr [hires_now]
00AD07A0 push ecx
00AD07A1 call _allmul (0AE7D40h)
00AD07A6 mov dword ptr [hires_now],eax
00AD07A9 mov dword ptr [ebp-10h],edx

Apparently _allmul should be popping the stack but isn't (other similar functions in SDL_stdlib.c - _alldiv and whatnot - DO pop the stack).

A 'ret 10h' at the end of _allmul appears to do the trick
     2 To compile and install SDL:
     4     0.  If you have downloaded this from the website, skip to the next step.
     5         If you have checked this out from subversion, you'll need to run
     6         ./ to build the configure script. 
     8     1.  Run './configure; make; make install'
    10         If you are compiling for Windows using gcc, read the FAQ at:
    13         If you are compiling using Visual C++ on Win32, you should read
    14         the file VisualC.html
    16     2.  Look at the example programs in ./test, and check out the online
    17         documentation at
    19     3.  Join the SDL developer mailing list by sending E-mail to
    21         and put "subscribe" in the subject of the message.
    23         Or alternatively you can use the web interface:
    26 That's it!
    27 Sam Lantinga <>