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// Copyright 2020 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. //go:build riscv64 && gc #include "textflag.h" TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0 // Rewind stack pointer so anything that happens on the stack // will clobber the test pattern created by the caller ADD $(1024*8), X2 // Ask signaller to setgid MOV $1, X5 FENCE MOVW X5, ·Baton(SB) FENCE // Wait for setgid completion loop: FENCE MOVW ·Baton(SB), X5 OR X6, X6, X6 // hint that we're in a spin loop BNE ZERO, X5, loop FENCE // Restore stack ADD $(-1024*8), X2 RET