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- // Copyright 2016 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.
- // +build mips64 mips64le
- // +build gc
- #include "textflag.h"
- #define SYNC WORD $0xf
- 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
- ADDV $(1024*8), R29
- // Ask signaller to setgid
- MOVW $1, R1
- SYNC
- MOVW R1, ·Baton(SB)
- SYNC
- // Wait for setgid completion
- loop:
- SYNC
- MOVW ·Baton(SB), R1
- OR R2, R2, R2 // hint that we're in a spin loop
- BNE R1, loop
- SYNC
- // Restore stack
- ADDV $(-1024*8), R29
- RET
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