github.com/bir3/gocompiler@v0.9.2202/src/cmd/cgo/internal/test/issue9400/asm_386.s (about)

     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  //go:build gc
     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