1 files changed, 35 insertions, 0 deletions
diff --git a/src/setjmp/longjmp.c b/src/setjmp/longjmp.c
new file mode 100644
index 00000000..bcb97410
--- /dev/null
+++ b/src/setjmp/longjmp.c
@@ -0,0 +1,35 @@
+#include <setjmp.h>
+
+/** restore calling environment **/
+_Noreturn void longjmp(jmp_buf env, int val)
+{
+	(void)env;
+	if (val == 0) {
+		val = 1;
+	}
+	/* Set env.return_register to val */
+	/* Load all registers from env */
+	for (;;); /* silence _Noreturn function returns warning */
+}
+
+/***
+THIS() restores the environment of a previous call to FUNCTION(setjmp)
+and continues execution at the location of the call to FUNCTION(setjmp).
+
+All objects previously accessible at the time of the call to FUNCTION(setjmp)
+have the same values. Non-TYPE(volatile) objects of automatic storage duration
+that have changed since the call to FUNCTION(setjmp) have intederminate values.
+
+When execution resumes at the point of the original call to FUNCTION(setjmp),
+the value specified by ARGUMENT(val) is returned. If 0 is specified, then the return
+value is 1.
+***/
+
+/*
+UNDEFINED(There was no previous call to FUNCTION(setjmp))
+UNDEFINED(The function containing the previous call to FUNCTION(setjmp) is no longer executing)
+UNDEFINED(THIS() is called from a nested signal handler)
+*/
+/*
+STDC(1)
+*/