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diff --git a/src/runtime/rt0_nacl_386.s b/src/runtime/rt0_nacl_386.s
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+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+// NaCl entry has:
+// 0(FP) - arg block == SP+8
+// 4(FP) - cleanup function pointer, always 0
+// 8(FP) - envc
+// 12(FP) - argc
+// 16(FP) - argv, then 0, then envv, then 0, then auxv
+TEXT _rt0_386_nacl(SB),NOSPLIT,$8
+ MOVL argc+12(FP), AX
+ LEAL argv+16(FP), BX
+ MOVL AX, 0(SP)
+ MOVL BX, 4(SP)
+ CALL main(SB)
+ INT $3
+
+TEXT main(SB),NOSPLIT,$0
+ JMP runtime·rt0_go(SB)