diff options
Diffstat (limited to 'misc/cgo/test/issue9400/asm_arm64.s')
| -rw-r--r-- | misc/cgo/test/issue9400/asm_arm64.s | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/misc/cgo/test/issue9400/asm_arm64.s b/misc/cgo/test/issue9400/asm_arm64.s new file mode 100644 index 0000000..2565793 --- /dev/null +++ b/misc/cgo/test/issue9400/asm_arm64.s @@ -0,0 +1,39 @@ +// Copyright 2014 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 gc + +#include "textflag.h" + +TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0 + // Save link register + MOVD R30, R9 + + // Rewind stack pointer so anything that happens on the stack + // will clobber the test pattern created by the caller + ADD $(1024 * 8), RSP + + // Ask signaller to setgid + MOVD $·Baton(SB), R0 + MOVD $1, R1 +storeloop: + LDAXRW (R0), R2 + STLXRW R1, (R0), R3 + CBNZ R3, storeloop + + // Wait for setgid completion + MOVW $0, R1 + MOVW $0, R2 +loop: + LDAXRW (R0), R3 + CMPW R1, R3 + BNE loop + STLXRW R2, (R0), R3 + CBNZ R3, loop + + // Restore stack + SUB $(1024 * 8), RSP + + MOVD R9, R30 + RET |