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

fusl/arch/x32/bits/user.h

Index: fusl/arch/x32/bits/user.h
diff --git a/fusl/arch/x32/bits/user.h b/fusl/arch/x32/bits/user.h
new file mode 100644
index 0000000000000000000000000000000000000000..1bd2d709e1a5584ebfc54bb95547c0c8a4d0fa12
--- /dev/null
+++ b/fusl/arch/x32/bits/user.h
@@ -0,0 +1,44 @@
+#undef __WORDSIZE
+#define __WORDSIZE 64
+
+typedef struct user_fpregs_struct
+{
+	uint16_t cwd, swd, ftw, fop;
+	uint64_t rip, rdp;
+	uint32_t mxcsr, mxcr_mask;
+	uint32_t st_space[32], xmm_space[64], padding[24];
+} elf_fpregset_t;
+
+struct user_regs_struct
+{
+	unsigned long r15, r14, r13, r12, rbp, rbx, r11, r10, r9, r8;
+	unsigned long rax, rcx, rdx, rsi, rdi, orig_rax, rip;
+	unsigned long cs, eflags, rsp, ss, fs_base, gs_base, ds, es, fs, gs;
+};
+#define ELF_NGREG 27
+typedef unsigned long long elf_greg_t, elf_gregset_t[ELF_NGREG];
+
+struct user
+{
+	struct user_regs_struct		regs;
+	int				u_fpvalid;
+	struct user_fpregs_struct	i387;
+	unsigned long			u_tsize;
+	unsigned long			u_dsize;
+	unsigned long			u_ssize;
+	unsigned long			start_code;
+	unsigned long			start_stack;
+	long				signal;
+	int				reserved;
+	struct user_regs_struct		*u_ar0;
+	struct user_fpregs_struct	*u_fpstate;
+	unsigned long			magic;
+	char				u_comm[32];
+	unsigned long			u_debugreg[8];
+};
+
+#define PAGE_MASK		(~(PAGE_SIZE-1))
+#define NBPG			PAGE_SIZE
+#define UPAGES			1
+#define HOST_TEXT_START_ADDR	(u.start_code)
+#define HOST_STACK_END_ADDR	(u.start_stack + u.u_ssize * NBPG)