1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // +build mips64 mips64le 6 // +build !gccgo 7 8 #include "textflag.h" 9 10 #define SYNC WORD $0xf 11 12 TEXT RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0 13 // Rewind stack pointer so anything that happens on the stack 14 // will clobber the test pattern created by the caller 15 ADDV $(1024*8), R29 16 17 // Ask signaller to setgid 18 MOVW $1, R1 19 SYNC 20 MOVW R1, Baton(SB) 21 SYNC 22 23 // Wait for setgid completion 24 loop: 25 SYNC 26 MOVW Baton(SB), R1 27 OR R2, R2, R2 // hint that we're in a spin loop 28 BNE R1, loop 29 SYNC 30 31 // Restore stack 32 ADDV $(-1024*8), R29 33 RET 34
