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Make stack check work if stack is a small value.

This commit is contained in:
Glenn Wurster 2005-08-25 19:20:21 +00:00 committed by Alexandre Julliard
parent f1853ba186
commit cee9a0f2a3
1 changed files with 2 additions and 1 deletions
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3
dlls/ntdll/signal_i386.c
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@ -761,7 +761,8 @@ static EXCEPTION_RECORD *setup_exception( SIGCONTEXT *sigcontext, raise_func fun
server_abort_thread(1); server_abort_thread(1);
} }
if ((char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit + 4096 || if (stack - 1 > stack || /* check for overflow in subtraction */
(char *)(stack - 1) < (char *)NtCurrentTeb()->Tib.StackLimit + 4096 ||
(char *)stack > (char *)NtCurrentTeb()->Tib.StackBase) (char *)stack > (char *)NtCurrentTeb()->Tib.StackBase)
{ {
UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit + 4096 - (char *)stack; UINT diff = (char *)NtCurrentTeb()->Tib.StackLimit + 4096 - (char *)stack;