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 !gccgo 6 7 #include "textflag.h" 8 9 TEXT RewindAndSetgid(SB),NOSPLIT,$0-0 10 MOVL $Baton(SB), BX 11 // Rewind stack pointer so anything that happens on the stack 12 // will clobber the test pattern created by the caller 13 ADDL $(1024 * 8), SP 14 15 // Ask signaller to setgid 16 MOVL $1, (BX) 17 18 // Wait for setgid completion 19 loop: 20 PAUSE 21 MOVL (BX), AX 22 CMPL AX, $0 23 JNE loop 24 25 // Restore stack 26 SUBL $(1024 * 8), SP 27 RET 28
