Warning: That file was not part of the compilation database. It may have many parsing errors.

1/* Copyright (C) 2012-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <http://www.gnu.org/licenses/>. */
17
18#include <sysdep.h>
19
20#include "ucontext_i.h"
21
22 .syntax unified
23 .text
24
25/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
26
27ENTRY(swapcontext)
28
29 /* Have getcontext() do most of the work then fix up
30 LR afterwards. Save R3 to keep the stack aligned. */
31 push {r0,r1,r3,r14}
32 cfi_adjust_cfa_offset (16)
33 cfi_rel_offset (r0,0)
34 cfi_rel_offset (r1,4)
35 cfi_rel_offset (r3,8)
36 cfi_rel_offset (r14,12)
37
38 bl __getcontext
39 mov r4, r0
40
41 pop {r0,r1,r3,r14}
42 cfi_adjust_cfa_offset (-16)
43 cfi_restore (r0)
44 cfi_restore (r1)
45 cfi_restore (r3)
46 cfi_restore (r14)
47
48 /* Exit if getcontext() failed. */
49 cmp r4, #0
50 itt ne
51 movne r0, r4
52 RETINSTR(ne, r14)
53
54 /* Fix up LR and the PC. */
55 str r13,[r0, #MCONTEXT_ARM_SP]
56 str r14,[r0, #MCONTEXT_ARM_LR]
57 str r14,[r0, #MCONTEXT_ARM_PC]
58
59 /* And swap using swapcontext(). */
60 mov r0, r1
61 b __setcontext
62
63END(swapcontext)
64

Warning: That file was not part of the compilation database. It may have many parsing errors.