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
|
// 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"
// _chkstk routine
// This routine is windows specific
// http://msdn.microsoft.com/en-us/library/ms648426.aspx
#ifdef __i386__
.text
.balign 4
DEFINE_COMPILERRT_FUNCTION(__chkstk_ms)
push %ecx
push %eax
cmp $0x1000,%eax
lea 12(%esp),%ecx
jb 1f
2:
sub $0x1000,%ecx
test %ecx,(%ecx)
sub $0x1000,%eax
cmp $0x1000,%eax
ja 2b
1:
sub %eax,%ecx
test %ecx,(%ecx)
pop %eax
pop %ecx
ret
END_COMPILERRT_FUNCTION(__chkstk_ms)
#endif // __i386__
|
