* low_level_handle_now_handler
* low_level_maybe_now_maybe_later
* low_level_unblock_me_trampoline
+ *
+ * This gives us a single point of control (or six) over errno, fp
+ * control word, and fixing up signal context on sparc.
+ *
+ * The SPARC/Linux platform doesn't quite do signals the way we want
+ * them done. The third argument in the handler isn't filled in by the
+ * kernel properly, so we fix it up ourselves in the
+ * arch_os_get_context(..) function. -- CSR, 2002-07-23
*/
#define SAVE_ERRNO(context,void_context) \
{ \
errno = _saved_errno; \
}
-static void run_deferred_handler(struct interrupt_data *data, void *v_context);
+static void run_deferred_handler(struct interrupt_data *data,
+ os_context_t *context);
#ifndef LISP_FEATURE_WIN32
static void store_signal_data_for_later (struct interrupt_data *data,
void *handler, int signal,
void
maybe_save_gc_mask_and_block_deferrables(sigset_t *sigset)
{
+#ifndef LISP_FEATURE_WIN32
struct thread *thread = arch_os_get_current_thread();
struct interrupt_data *data = thread->interrupt_data;
sigset_t oldset;
}
}
thread_sigmask(SIG_SETMASK,&oldset,0);
+#endif
}
/* Are we leaving WITH-GCING and already running with interrupts
void
check_interrupt_context_or_lose(os_context_t *context)
{
+#ifndef LISP_FEATURE_WIN32
struct thread *thread = arch_os_get_current_thread();
struct interrupt_data *data = thread->interrupt_data;
int interrupt_deferred_p = (data->pending_handler != 0);
* that run lisp code. */
check_gc_signals_unblocked_in_sigset_or_lose(sigset);
}
+#endif
}
/* When we catch an internal error, should we pass it back to Lisp to
boolean internal_errors_enabled = 0;
#ifndef LISP_FEATURE_WIN32
-static void (*interrupt_low_level_handlers[NSIG]) (int, siginfo_t*, void*);
+static
+void (*interrupt_low_level_handlers[NSIG]) (int, siginfo_t*, os_context_t*);
#endif
union interrupt_handler interrupt_handlers[NSIG];
* the os_context for the signal we're currently in the
* handler for. This should ensure that when we return from
* the handler the blocked signals are unblocked. */
+#ifndef LISP_FEATURE_WIN32
sigcopyset(os_context_sigmask_addr(context), &data->pending_mask);
+#endif
data->gc_blocked_deferrables = 0;
}
arch_clear_pseudo_atomic_interrupted(context);
/* Restore the sigmask in the context. */
sigcopyset(os_context_sigmask_addr(context), &data->pending_mask);
- /* This will break on sparc linux: the deferred handler really
- * wants to be called with a void_context */
- run_deferred_handler(data,(void *)context);
+ run_deferred_handler(data, context);
}
/* It is possible that the end of this function was reached
* without never actually doing anything, the tests in Lisp for
#endif
}
\f
-/*
- * the two main signal handlers:
- * interrupt_handle_now(..)
- * maybe_now_maybe_later(..)
- *
- * to which we have added interrupt_handle_now_handler(..). Why?
- * Well, mostly because the SPARC/Linux platform doesn't quite do
- * signals the way we want them done. The third argument in the
- * handler isn't filled in by the kernel properly, so we fix it up
- * ourselves in the arch_os_get_context(..) function; however, we only
- * want to do this when we first hit the handler, and not when
- * interrupt_handle_now(..) is being called from some other handler
- * (when the fixup will already have been done). -- CSR, 2002-07-23
- */
void
interrupt_handle_now(int signal, siginfo_t *info, os_context_t *context)
* already; we're just doing the Lisp-level processing now that we
* put off then */
static void
-run_deferred_handler(struct interrupt_data *data, void *v_context)
+run_deferred_handler(struct interrupt_data *data, os_context_t *context)
{
/* The pending_handler may enable interrupts and then another
* interrupt may hit, overwrite interrupt_data, so reset the
* pending handler before calling it. Trust the handler to finish
* with the siginfo before enabling interrupts. */
- void (*pending_handler) (int, siginfo_t*, void*)=data->pending_handler;
+ void (*pending_handler) (int, siginfo_t*, os_context_t*) =
+ data->pending_handler;
data->pending_handler=0;
FSHOW_SIGNAL((stderr, "/running deferred handler %p\n", pending_handler));
- (*pending_handler)(data->pending_signal,&(data->pending_info), v_context);
+ (*pending_handler)(data->pending_signal,&(data->pending_info), context);
}
#ifndef LISP_FEATURE_WIN32
/* This function must not cons, because that may trigger a GC. */
void
-sig_stop_for_gc_handler(int signal, siginfo_t *info, void *void_context)
+sig_stop_for_gc_handler(int signal, siginfo_t *info, os_context_t *context)
{
- os_context_t *context = arch_os_get_context(&void_context);
-
struct thread *thread=arch_os_get_current_thread();
sigset_t ss;
void
arrange_return_to_lisp_function(os_context_t *context, lispobj function)
{
+#ifndef LISP_FEATURE_WIN32
check_gc_signals_unblocked_in_sigset_or_lose
(os_context_sigmask_addr(context));
+#endif
#if !(defined(LISP_FEATURE_X86) || defined(LISP_FEATURE_X86_64))
void * fun=native_pointer(function);
void *code = &(((struct simple_fun *) fun)->code);
sigemptyset(&unblock);
sigaddset(&unblock, signal);
thread_sigmask(SIG_UNBLOCK, &unblock, 0);
- (*interrupt_low_level_handlers[signal])(signal, info, void_context);
+ (*interrupt_low_level_handlers[signal])(signal, info, context);
RESTORE_ERRNO;
}
low_level_handle_now_handler(int signal, siginfo_t *info, void *void_context)
{
SAVE_ERRNO(context,void_context);
- (*interrupt_low_level_handlers[signal])(signal, info, void_context);
+ (*interrupt_low_level_handlers[signal])(signal, info, context);
RESTORE_ERRNO;
}
}
if (ARE_SAME_HANDLER(handler, SIG_DFL))
- sa.sa_sigaction = handler;
+ sa.sa_sigaction = (void (*)(int, siginfo_t*, void*))handler;
else if (sigismember(&deferrable_sigset,signal))
sa.sa_sigaction = low_level_maybe_now_maybe_later;
- /* The use of a trampoline appears to break the
- arch_os_get_context() workaround for SPARC/Linux. For now,
- don't use the trampoline (and so be vulnerable to the problems
- that SA_NODEFER is meant to solve. */
-#if !(defined(LISP_FEATURE_SPARC) && defined(LISP_FEATURE_LINUX))
else if (!sigaction_nodefer_works &&
!sigismember(&blockable_sigset, signal))
sa.sa_sigaction = low_level_unblock_me_trampoline;
-#endif
else
sa.sa_sigaction = low_level_handle_now_handler;
/* This is called from Lisp. */
unsigned long
-install_handler(int signal, void handler(int, siginfo_t*, void*))
+install_handler(int signal, void handler(int, siginfo_t*, os_context_t*))
{
#ifndef LISP_FEATURE_WIN32
struct sigaction sa;
if (interrupt_low_level_handlers[signal]==0) {
if (ARE_SAME_HANDLER(handler, SIG_DFL) ||
ARE_SAME_HANDLER(handler, SIG_IGN))
- sa.sa_sigaction = handler;
+ sa.sa_sigaction = (void (*)(int, siginfo_t*, void*))handler;
else if (sigismember(&deferrable_sigset, signal))
sa.sa_sigaction = maybe_now_maybe_later;
else if (!sigaction_nodefer_works &&
/* This must not go through lisp as it's allowed anytime, even when on
* the altstack. */
void
-sigabrt_handler(int signal, siginfo_t *info, void *void_context)
+sigabrt_handler(int signal, siginfo_t *info, os_context_t *context)
{
lose("SIGABRT received.\n");
}
* signal(..)-style one-argument handlers, which is OK
* because it works to call the 1-argument form where the
* 3-argument form is expected.) */
- (void (*)(int, siginfo_t*, void*))SIG_DFL;
+ (void (*)(int, siginfo_t*, os_context_t*))SIG_DFL;
}
undoably_install_low_level_interrupt_handler(SIGABRT, sigabrt_handler);
SHOW("returning from interrupt_init()");
projects / sbcl.git / blobdiff