author Sam Lantinga <slouken@libsdl.org>
Thu, 16 May 2013 00:43:22 -0700
changeset 7180 3733e68edbc3
parent 4462 5cb6424a5676
child 7578 4b43278168be
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
     1 0afe0e38e02cf2048e93582f01c52fbb91d3c7bb release-1.2.7
     2 230b156829ed13b31134d96f689c917981f57b84 release-1.2.5
     3 27cab50ec9c746e886ce0f3fdaa0b0cdc55a594f release-1.2.11
     4 2fe3fbd2bff50165b3cad33bf40d70b3bb3c9fd0 release-1.2.3
     5 3c052d3bcc76c899dfd4846be76243a78e8c7180 release-1.2.4
     6 3c5eed71a3320962551af3b3dfbee0c99fcf0086 release-1.2.10
     7 4867f7f7dd3426d1dbbeef48b3f3b3aa19590cc4 release-1.2.12
     8 6e28dae59e3baf4447c83e833a8d2ac912536f5b release-1.2.1
     9 7c2589fb8d4df54c6faabd3faebd0c0e73f67879 release-1.2.13
    10 86de11faf082881ad9b73a1a1d78733ca07f8db8 release-1.2.6
    11 bb051fa871aa0b53ea57df56a446cec3bb85924c release-1.2.2
    12 cfcb2e1c36ebe9809577adf768b0ec53e8768af9 release-1.2.8
    13 e044e7c70a50a2f54d14ee20d0933e904e5853b6 release-1.2.9
    14 f14cf9d71233934811774f941d0de121d5f96ccf release-1.2.14
    15 39c22a953456f6c9e2c8993c8ff973824104102a pre-touch-removal