Add a "fork" of musl as //fusl.

fusl/arch/x32/src/syscall_cp_fixup.c

Index: fusl/arch/x32/src/syscall_cp_fixup.c
diff --git a/fusl/arch/x32/src/syscall_cp_fixup.c b/fusl/arch/x32/src/syscall_cp_fixup.c
new file mode 100644
index 0000000000000000000000000000000000000000..b1f3a382b398f67a07779d83c21dcf937e5c235a
--- /dev/null
+++ b/fusl/arch/x32/src/syscall_cp_fixup.c
@@ -0,0 +1,38 @@
+#include <sys/syscall.h>
+
+__attribute__((__visibility__("hidden")))
+long __syscall_cp_internal(volatile void*, long long, long long, long long, long long,
+                             long long, long long, long long);
+
+struct __timespec { long long tv_sec; long tv_nsec; };
+struct __timespec_kernel { long long tv_sec; long long tv_nsec; };
+#define __tsc(X) ((struct __timespec*)(unsigned long)(X))
+#define __fixup(X) do { if(X) { \
+	ts->tv_sec = __tsc(X)->tv_sec; \
+	ts->tv_nsec = __tsc(X)->tv_nsec; \
+	(X) = (unsigned long)ts; } } while(0)
+
+__attribute__((__visibility__("hidden")))
+long __syscall_cp_asm (volatile void * foo, long long n, long long a1, long long a2, long long a3,
+	                     long long a4, long long a5, long long a6)
+{
+	struct __timespec_kernel ts[1];
+	switch (n) {
+	case SYS_mq_timedsend: case SYS_mq_timedreceive: case SYS_pselect6:
+		__fixup(a5);
+		break;
+	case SYS_futex:
+		if((a2 & (~128 /* FUTEX_PRIVATE_FLAG */)) == 0 /* FUTEX_WAIT */)
+			__fixup(a4);
+		break;
+	case SYS_clock_nanosleep:
+	case SYS_rt_sigtimedwait: case SYS_ppoll:
+		__fixup(a3);
+		break;
+	case SYS_nanosleep:
+		__fixup(a1);
+		break;
+	}
+	return __syscall_cp_internal(foo, n, a1, a2, a3, a4, a5, a6);
+}
+