Add build system scaffolding and libc headers

1 files changed, 27 insertions, 0 deletions

diff --git a/lib/libc/stdlib/abort.c b/lib/libc/stdlib/abort.c
new file mode 100644
index 00000000..3d022e70
--- /dev/null
+++ b/lib/libc/stdlib/abort.c
@@ -0,0 +1,27 @@
+#include <atomic.h>
+#include <stdlib.h>
+#include <syscall.h>
+#include <asm-generic/signal.h>
+#include <thread.h>
+#include <threads.h>
+#include <unistd.h>
+#include <libc.h>
+
+int raise(int);
+
+_Noreturn void abort(void)
+{
+	struct sigaction sa;
+
+	raise(SIGABRT);
+
+	LIBC_LOCK(libc.lock.abort);
+	sa.sa_handler = SIG_DFL;
+
+	__syscall(rt_sigaction, SIGABRT, &sa, NULL, _NSIG / 8);
+	__syscall(tkill, thrd_current()->tid, SIGABRT);
+
+	// This point should never be reached
+	raise(SIGKILL);
+	_exit(127);
+}