1 // Copyright 2014 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 ppc64 ppc64le 6 // +build !gccgo 7 8 #include "textflag.h" 9 10 TEXT RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0 11 // Rewind stack pointer so anything that happens on the stack 12 // will clobber the test pattern created by the caller 13 ADD $(1024 * 8), R1 14 15 // Ask signaller to setgid 16 MOVW $1, R3 17 SYNC 18 MOVW R3, Baton(SB) 19 20 // Wait for setgid completion 21 loop: 22 SYNC 23 MOVW Baton(SB), R3 24 CMP R3, $0 25 // Hint that we're in a spin loop 26 OR R1, R1, R1 27 BNE loop 28 ISYNC 29 30 // Restore stack 31 SUB $(1024 * 8), R1 32 RET 33
