lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/lib/mlibc/sysdeps/aero/generic/signals.cpp b/lib/mlibc/sysdeps/aero/generic/signals.cpp
new file mode 100644
index 0000000..a6f69ff
--- /dev/null
+++ b/lib/mlibc/sysdeps/aero/generic/signals.cpp
@@ -0,0 +1,53 @@
+#include <mlibc/ansi-sysdeps.hpp>
+#include <mlibc/debug.hpp>
+
+#include <aero/syscall.h>
+#include <sys/types.h>
+
+#define LOG_SIGACTION_INSTALL 0
+
+extern "C" void __mlibc_signal_restore(); // defined in `signals.S`
+
+namespace mlibc {
+int sys_sigaction(int how, const struct sigaction *__restrict action,
+                  struct sigaction *__restrict old_action) {
+#if LOG_SIGACTION_INSTALL
+    mlibc::infoLogger() << "sys_sigaction: signal " << how << frg::endlog;
+    mlibc::infoLogger() << "sys_sigaction: size: " << sizeof(*action)
+                        << frg::endlog;
+
+    if (action != NULL) {
+        mlibc::infoLogger() << "sys_sigaction: handler "
+                            << (int64_t)action->sa_handler << frg::endlog;
+        mlibc::infoLogger() << "sys_sigaction: action "
+                            << (int64_t)action->sa_sigaction << frg::endlog;
+        mlibc::infoLogger() << "sys_sigaction: flags "
+                            << (int64_t)action->sa_flags << frg::endlog;
+    }
+
+    mlibc::infoLogger() << frg::endlog;
+#endif
+
+    auto sigreturn = (sc_word_t)__mlibc_signal_restore;
+
+    auto res = syscall(SYS_SIGACTION, how, (sc_word_t)action, sigreturn,
+                       (sc_word_t)old_action);
+
+    if (res < 0) {
+        return -res;
+    }
+
+    return 0;
+}
+
+int sys_sigprocmask(int how, const sigset_t *__restrict set,
+                    sigset_t *__restrict retrieve) {
+    auto result = syscall(SYS_SIGPROCMASK, how, set, retrieve);
+
+    if (result < 0) {
+        return -result;
+    }
+
+    return 0;
+}
+} // namespace mlibc
\ No newline at end of file