#include "errno.h"
#include "types.h"
-/* Syscall return helper, set errno as -ret when ret < 0 */
+
+/* Syscall return helper for library routines, set errno as -ret when ret is in
+ * range of [-MAX_ERRNO, -1]
+ *
+ * Note, No official reference states the errno range here aligns with musl
+ * (src/internal/syscall_ret.c) and glibc (sysdeps/unix/sysv/linux/sysdep.h)
+ */
+
static __inline__ __attribute__((unused, always_inline))
-long __sysret(long ret)
+long __sysret(unsigned long ret)
{
- if (ret < 0) {
- SET_ERRNO(-ret);
- ret = -1;
+ if (ret >= (unsigned long)-MAX_ERRNO) {
+ SET_ERRNO(-(long)ret);
+ return -1;
}
return ret;
}