blob: dd06e7191f9b8e5ff780343b60c451a35ebf2dda (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
|
//===-- sync_synchronize - Implement memory barrier * ----------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "../assembly.h"
// When compiling a use of the gcc built-in __sync_synchronize() in thumb1 mode
// the compiler may emit a call to __sync_synchronize.
// On Darwin the implementation jumps to an OS supplied function named
// OSMemoryBarrier
.text
.syntax unified
#if __APPLE__
.p2align 2
DEFINE_COMPILERRT_PRIVATE_FUNCTION(__sync_synchronize)
stmfd sp!, {r7, lr}
add r7, sp, #0
bl _OSMemoryBarrier
ldmfd sp!, {r7, pc}
END_COMPILERRT_FUNCTION(__sync_synchronize)
// tell linker it can break up file at label boundaries
.subsections_via_symbols
#endif
NO_EXEC_STACK_DIRECTIVE
|
