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

fusl/src/thread/mips/syscall_cp.s

Index: fusl/src/thread/mips/syscall_cp.s
diff --git a/fusl/src/thread/mips/syscall_cp.s b/fusl/src/thread/mips/syscall_cp.s
new file mode 100644
index 0000000000000000000000000000000000000000..8f76d40e1ebf2976f4139caaf735f781e098e50a
--- /dev/null
+++ b/fusl/src/thread/mips/syscall_cp.s
@@ -0,0 +1,46 @@
+.set    noreorder
+
+.global __cp_begin
+.hidden __cp_begin
+.type   __cp_begin,@function
+.global __cp_end
+.hidden __cp_end
+.type   __cp_end,@function
+.global __cp_cancel
+.hidden __cp_cancel
+.type   __cp_cancel,@function
+.hidden __cancel
+.global __syscall_cp_asm
+.hidden __syscall_cp_asm
+.type   __syscall_cp_asm,@function
+__syscall_cp_asm:
+	subu    $sp, $sp, 32
+__cp_begin:
+	lw      $4, 0($4)
+	bne     $4, $0, __cp_cancel
+	move    $2, $5
+	move    $4, $6
+	move    $5, $7
+	lw      $6, 48($sp)
+	lw      $7, 52($sp)
+	lw      $8, 56($sp)
+	lw      $9, 60($sp)
+	lw      $10,64($sp)
+	sw      $8, 16($sp)
+	sw      $9, 20($sp)
+	sw      $10,24($sp)
+	sw      $2, 28($sp)
+	lw      $2, 28($sp)
+	syscall
+__cp_end:
+	beq     $7, $0, 1f
+	addu    $sp, $sp, 32
+	subu    $2, $0, $2
+1:	jr      $ra
+	nop
+
+__cp_cancel:
+	addu    $sp, $sp, 32
+	lw      $25, %call16(__cancel)($gp)
+	jr      $25
+	nop