This commit was generated by cvs2svn to compensate for changes in r2,
which included commits to RCS files with non-trunk default branches.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@3 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/linux-user/signal.c b/linux-user/signal.c
new file mode 100644
index 0000000..2e0d599
--- /dev/null
+++ b/linux-user/signal.c
@@ -0,0 +1,105 @@
+/*
+ * Emulation of Linux signal handling
+ *
+ * Copyright (c) 2003 Fabrice Bellard
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <signal.h>
+#include <sys/ucontext.h>
+
+/* Algorithm strongly inspired from em86 : we queue the signals so
+ that we can handle them at precise points in the emulated code. */
+
+struct emulated_sigaction {
+ struct target_sigaction sa;
+ int nb_pending;
+ struct target_siginfo info;
+};
+
+struct emulated_sigaction sigact_table[NSIG];
+int signal_pending;
+
+static inline int host_to_target_signal(int sig)
+{
+ return sig;
+}
+
+static inline int target_to_host_signal(int sig)
+{
+ return sig;
+}
+
+void signal_init(void)
+{
+ struct sigaction act;
+ int i;
+
+ /* set all host signal handlers */
+ sigemptyset(&act.sa_mask);
+ act.sa_flags = SA_SIGINFO;
+ act.sa_sigaction = host_signal_handler;
+ for(i = 1; i < NSIG; i++) {
+ sigaction(i, &sa, NULL);
+ }
+
+ memset(sigact_table, 0, sizeof(sigact_table));
+}
+
+static void host_signal_handler(int host_signum, siginfo_t *info,
+ void *puc)
+{
+ struct ucontext *uc = puc;
+ int signum;
+ /* get target signal number */
+ signum = host_to_target(host_signum);
+ if (signum >= TARGET_NSIG)
+ return;
+ /* we save the old mask */
+
+
+}
+
+
+void process_pending_signals(void)
+{
+ int signum;
+ target_ulong _sa_handler;
+
+ struct emulated_sigaction *esig;
+
+ if (!signal_pending)
+ return;
+
+ esig = sigact_table;
+ for(signum = 1; signum < TARGET_NSIG; signum++) {
+ if (esig->nb_pending != 0)
+ goto handle_signal;
+ esig++;
+ }
+ /* if no signal is pending, just return */
+ signal_pending = 0;
+ return;
+ handle_signal:
+ _sa_handler = esig->sa._sa_handler;
+ if (_sa_handler == TARGET_SIG_DFL) {
+ /* default handling
+ }
+
+
+}
