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ntdll: Handle stack guard pages on x86_64. 

Signed-off-by: Sebastian Lackner <sebastian@fds-team.de>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Sebastian Lackner 2016-04-15 10:52:17 +02:00 committed by Alexandre Julliard
parent c7a174f76b
commit d25ae3ca25
1 changed files with 19 additions and 1 deletions
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20
dlls/ntdll/signal_x86_64.c
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@ -2587,9 +2587,27 @@ static inline BOOL handle_interrupt( unsigned int interrupt, EXCEPTION_RECORD *r
*/
static void segv_handler( int signal, siginfo_t *siginfo, void *sigcontext )
{
EXCEPTION_RECORD *rec = setup_exception( sigcontext, raise_segv_exception );
EXCEPTION_RECORD *rec;
ucontext_t *ucontext = sigcontext;
/* check for page fault inside the thread stack */
if (TRAP_sig(ucontext) == TRAP_x86_PAGEFLT &&
(char *)siginfo->si_addr >= (char *)NtCurrentTeb()->DeallocationStack &&
(char *)siginfo->si_addr < (char *)NtCurrentTeb()->Tib.StackBase &&
virtual_handle_stack_fault( siginfo->si_addr ))
{
/* check if this was the last guard page */
if ((char *)siginfo->si_addr < (char *)NtCurrentTeb()->DeallocationStack + 2*4096)
{
rec = setup_exception( sigcontext, raise_segv_exception );
rec->ExceptionCode = EXCEPTION_STACK_OVERFLOW;
}
return;
}
rec = setup_exception( sigcontext, raise_segv_exception );
if (rec->ExceptionCode == EXCEPTION_STACK_OVERFLOW) return;
switch(TRAP_sig(ucontext))
{
case TRAP_x86_OFLOW: /* Overflow exception */