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
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
/* Functions for CET/x86.
Copyright (C) 2017-2018 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "output.h"
#include "linux-common.h"
void
file_end_indicate_exec_stack_and_cet (void)
{
file_end_indicate_exec_stack ();
if (flag_cf_protection == CF_NONE)
return;
unsigned int feature_1 = 0;
if (TARGET_IBT)
/* GNU_PROPERTY_X86_FEATURE_1_IBT. */
feature_1 |= 0x1;
if (TARGET_SHSTK)
/* GNU_PROPERTY_X86_FEATURE_1_SHSTK. */
feature_1 |= 0x2;
if (feature_1)
{
int p2align = ptr_mode == SImode ? 2 : 3;
/* Generate GNU_PROPERTY_X86_FEATURE_1_XXX. */
switch_to_section (get_section (".note.gnu.property",
SECTION_NOTYPE, NULL));
ASM_OUTPUT_ALIGN (asm_out_file, p2align);
/* name length. */
fprintf (asm_out_file, ASM_LONG " 1f - 0f\n");
/* data length. */
fprintf (asm_out_file, ASM_LONG " 4f - 1f\n");
/* note type: NT_GNU_PROPERTY_TYPE_0. */
fprintf (asm_out_file, ASM_LONG " 5\n");
ASM_OUTPUT_LABEL (asm_out_file, "0");
/* vendor name: "GNU". */
fprintf (asm_out_file, STRING_ASM_OP " \"GNU\"\n");
ASM_OUTPUT_LABEL (asm_out_file, "1");
ASM_OUTPUT_ALIGN (asm_out_file, p2align);
/* pr_type: GNU_PROPERTY_X86_FEATURE_1_AND. */
fprintf (asm_out_file, ASM_LONG " 0xc0000002\n");
/* pr_datasz. */\
fprintf (asm_out_file, ASM_LONG " 3f - 2f\n");
ASM_OUTPUT_LABEL (asm_out_file, "2");
/* GNU_PROPERTY_X86_FEATURE_1_XXX. */
fprintf (asm_out_file, ASM_LONG " 0x%x\n", feature_1);
ASM_OUTPUT_LABEL (asm_out_file, "3");
ASM_OUTPUT_ALIGN (asm_out_file, p2align);
ASM_OUTPUT_LABEL (asm_out_file, "4");
}
}
|
