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

1/* Modify saved context.
2
3 Copyright (C) 2009-2019 Free Software Foundation, Inc.
4
5 This file is part of the GNU C Library.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public License as
9 published by the Free Software Foundation; either version 2.1 of the
10 License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21#include <sysdep.h>
22
23#include "ucontext_i.h"
24#include "ucontext-internal.h"
25
26/* int swapcontext (ucontext_t *oucp, const ucontext_t *ucp) */
27
28 .text
29ENTRY(__swapcontext)
30 DELOUSE (0)
31 /* Set the value returned when swapcontext() returns in this context. */
32 str xzr, [x0, oX0 + 0 * SZREG]
33
34 stp x18, x19, [x0, oX0 + 18 * SZREG]
35 stp x20, x21, [x0, oX0 + 20 * SZREG]
36 stp x22, x23, [x0, oX0 + 22 * SZREG]
37 stp x24, x25, [x0, oX0 + 24 * SZREG]
38 stp x26, x27, [x0, oX0 + 26 * SZREG]
39 stp x28, x29, [x0, oX0 + 28 * SZREG]
40 str x30, [x0, oX0 + 30 * SZREG]
41 str x30, [x0, oPC]
42 mov x2, sp
43 str x2, [x0, oSP]
44
45 /* Figure out where to place the first context extension
46 block. */
47 add x2, x0, #oEXTENSION
48
49 /* Write the context extension fpsimd header. */
50 mov w3, #(FPSIMD_MAGIC & 0xffff)
51 movk w3, #(FPSIMD_MAGIC >> 16), lsl #16
52 str w3, [x2, #oHEAD + oMAGIC]
53 mov w3, #FPSIMD_CONTEXT_SIZE
54 str w3, [x2, #oHEAD + oSIZE]
55
56 /* Fill in the FP SIMD context. */
57 add x3, x2, #oV0 + 8 * SZVREG
58 stp q8, q9, [x3], #2 * SZVREG
59 stp q10, q11, [x3], #2 * SZVREG
60 stp q12, q13, [x3], #2 * SZVREG
61 stp q14, q15, [x3], #2 * SZVREG
62
63 add x3, x2, #oFPSR
64
65 mrs x4, fpsr
66 str w4, [x3, #oFPSR - oFPSR]
67
68 mrs x4, fpcr
69 str w4, [x3, #oFPCR - oFPSR]
70
71 /* Write the termination context extension header. */
72 add x2, x2, #FPSIMD_CONTEXT_SIZE
73
74 str xzr, [x2, #oHEAD + oMAGIC]
75 str xzr, [x2, #oHEAD + oSIZE]
76
77 /* Preserve ucp. */
78 mov x21, x1
79
80 /* rt_sigprocmask (SIG_SETMASK, &ucp->uc_sigmask, &oucp->uc_sigmask,
81 _NSIG8) */
82 /* Grab the signal mask */
83 /* rt_sigprocmask (SIG_BLOCK, NULL, &ucp->uc_sigmask, _NSIG8) */
84 add x2, x0, #UCONTEXT_SIGMASK
85 mov x0, SIG_BLOCK
86 mov x1, 0
87 mov x3, _NSIG8
88 mov x8, SYS_ify (rt_sigprocmask)
89 svc 0
90 cbnz x0, 1f
91
92 mov x22, x30
93 mov x0, x21
94 bl JUMPTARGET (__setcontext)
95 mov x30, x22
96 RET
97
981:
99 b C_SYMBOL_NAME(__syscall_error)
100PSEUDO_END (__swapcontext)
101weak_alias (__swapcontext, swapcontext)
102

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