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Prevent crash from unaligned memory access on sparc64, etc.

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Fixes Bugzilla #602. I suspect this will crash elsewhere if the system
 actually had modelines to report, though.

--HG--
branch : SDL-1.2
This commit is contained in:
Ryan C. Gordon
2008-09-08 07:33:05 +00:00
parent df30ba72ab
commit bdabeb0777
1 changed files with 7 additions and 1 deletions
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8
src/video/Xext/Xxf86vm/XF86VMode.c
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@@ -214,6 +214,12 @@ SDL_NAME(XF86VidModeGetGamma)(Display *dpy, int screen, SDL_NAME(XF86VidModeGamm
return True;
}
/* this is to prevent an unaligned memory write on CPUs that need that. */
static void zap_ptr(char *ptr, size_t size)
{
memset(ptr, '\0', size);
}
Bool
SDL_NAME(XF86VidModeGetModeLine)(dpy, screen, dotclock, modeline)
Display* dpy;
@@ -284,7 +290,7 @@ SDL_NAME(XF86VidModeGetModeLine)(dpy, screen, dotclock, modeline)
}
_XRead(dpy, (char*)modeline->private, modeline->privsize * sizeof(INT32));
} else {
modeline->private = NULL;
zap_ptr((char *)&modeline->private, sizeof(modeline->private))
}
UnlockDisplay(dpy);
SyncHandle();