1 files changed, 48 insertions, 0 deletions
diff --git a/usr/include/setjmp.h b/usr/include/setjmp.h
new file mode 100644
index 0000000..5916cd8
--- /dev/null
+++ b/usr/include/setjmp.h
@@ -0,0 +1,48 @@
+/*
+ * setjmp.h
+ */
+
+#ifndef _SETJMP_H
+#define _SETJMP_H
+
+#include <klibc/extern.h>
+#include <klibc/compiler.h>
+#include <stddef.h>
+#include <signal.h>
+
+#include <klibc/archsetjmp.h>
+
+__extern int setjmp(jmp_buf);
+__extern __noreturn longjmp(jmp_buf, int);
+
+/*
+  Whose bright idea was it to add unrelated functionality to just about
+  the only function in the standard C library (setjmp) which cannot be
+  wrapped by an ordinary function wrapper?  Anyway, the damage is done,
+  and therefore, this wrapper *must* be inline.  However, gcc will
+  complain if this is an inline function for unknown reason, and
+  therefore sigsetjmp() needs to be a macro.
+*/
+
+struct __sigjmp_buf {
+	jmp_buf __jmpbuf;
+	sigset_t __sigs;
+	unsigned char __sigs_saved;
+};
+
+typedef struct __sigjmp_buf sigjmp_buf[1];
+
+#define sigsetjmp(__env, __save) \
+({ \
+  struct __sigjmp_buf *__e = (__env); \
+  if (__save) { \
+    sigprocmask(0, NULL, &__e->__sigs); \
+    __e->__sigs_saved = 1; \
+  } else \
+    __e->__sigs_saved = 0; \
+  setjmp(__e->__jmpbuf); \
+})
+
+__extern __noreturn siglongjmp(sigjmp_buf, int);
+
+#endif				/* _SETJMP_H */