#include <signal.h>
+/*
+ * This is a workaround for some slightly silly Linux/GNU Libc
+ * behaviour: glibc defines sigset_t to support 1024 signals, which is
+ * more than the kernel. This is usually not a problem, but becomes
+ * one when we want to save a signal mask from a ucontext, and restore
+ * it later into another ucontext: the ucontext is allocated on the
+ * stack by the kernel, so copying a libc-sized sigset_t into it will
+ * overflow and cause other data on the stack to be corrupted */
+/* FIXME: do not rely on NSIG being a multiple of 8 */
+#define REAL_SIGSET_SIZE_BYTES ((NSIG/8))
+
+static inline void
+sigcopyset(sigset_t *new, sigset_t *old)
+{
+ memcpy(new, old, REAL_SIGSET_SIZE_BYTES);
+}
+
/* maximum signal nesting depth
*
* Note: In CMU CL, this was 4096, but there was no explanation given,
void (*interrupt_low_level_handlers[NSIG]) (int, siginfo_t*, void*) ;
union interrupt_handler interrupt_handlers[NSIG];
- /* signal number, siginfo_t, and old mask information for pending
- * signal. pending_signal=0 when there is no pending signal. */
+ /* signal information for pending signal. pending_signal=0 when there
+ * is no pending signal. */
+ void (*pending_handler) (int, siginfo_t*, void*) ;
int pending_signal ;
siginfo_t pending_info;
sigset_t pending_mask;
extern void interrupt_init();
extern void fake_foreign_function_call(os_context_t* context);
extern void undo_fake_foreign_function_call(os_context_t* context);
+extern void arrange_return_to_lisp_function(os_context_t *, lispobj);
extern void interrupt_handle_now(int, siginfo_t*, void*);
extern void interrupt_handle_pending(os_context_t*);
extern void interrupt_internal_error(int, siginfo_t*, os_context_t*,
boolean continuable);
-extern boolean handle_control_stack_guard_triggered(os_context_t *,void *);
+extern boolean handle_guard_page_triggered(os_context_t *,void *);
extern boolean interrupt_maybe_gc(int, siginfo_t*, void*);
-extern boolean handle_rt_signal(int, siginfo_t*, void*);
+#ifdef LISP_FEATURE_SB_THREAD
+extern void interrupt_thread_handler(int, siginfo_t*, void*);
+extern void sig_stop_for_gc_handler(int, siginfo_t*, void*);
+extern void thread_exit_handler(int, siginfo_t*, void*);
+#endif
extern void undoably_install_low_level_interrupt_handler (int signal,
void
handler(int,
* signal(..) handlers have another, and attempting to represent them
* "cleanly" with union types is in fact a mess. */
#define ARE_SAME_HANDLER(x, y) ((void*)(x) == (void*)(y))
+
#endif
+