From db2af69d6ba836a264878dbf2cf676d3c1fc46b4 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Wed, 29 Sep 2021 09:05:28 -0400 Subject: linux-user: Add infrastructure for a signal trampoline page Allocate a page to hold the signal trampoline(s). Invoke a guest-specific hook to fill in the contents of the page before marking it read-execute again. Reviewed-by: Max Filippov Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Peter Maydell Signed-off-by: Richard Henderson Message-Id: <20210929130553.121567-2-richard.henderson@linaro.org> Signed-off-by: Laurent Vivier --- linux-user/signal.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'linux-user/signal.c') diff --git a/linux-user/signal.c b/linux-user/signal.c index 2038216455..14d8fdfde1 100644 --- a/linux-user/signal.c +++ b/linux-user/signal.c @@ -35,6 +35,9 @@ static struct target_sigaction sigact_table[TARGET_NSIG]; static void host_signal_handler(int host_signum, siginfo_t *info, void *puc); +/* Fallback addresses into sigtramp page. */ +abi_ulong default_sigreturn; +abi_ulong default_rt_sigreturn; /* * System includes define _NSIG as SIGRTMAX + 1, -- cgit v1.2.3-55-g7522