2 Copyright (C) 1997-2024 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library. If not, see
17 <https://www.gnu.org/licenses/>. */
20 #include <pointer_guard.h>
21 #include <stap-probe.h>
22 #include <bits/setjmp.h>
23 #include <rtld-global-offsets.h>
24 #include <arm-features.h>
26 /* __longjmp(jmpbuf, val) */
32 ldr r4, [ip] /* jmpbuf's sp */
35 PTR_DEMANGLE (r4, r4, a3, a4)
42 PTR_DEMANGLE (a4, a4, a3, r4)
45 PTR_DEMANGLE2 (r4, r4, a3)
51 /* longjmp probe expects longjmp first argument (4@r0), second
52 argument (-4@r1), and target address (4@r4), respectively. */
53 LIBC_PROBE (longjmp, 3, 4@r0, -4@r1, 4@r4)
56 ldmia ip!, JMP_BUF_REGLIST
68 #if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__
74 LDST_PCREL (ldr, a4, a3, \
75 C_SYMBOL_NAME(_rtld_local_ro) \
76 + RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
79 LDR_GLOBAL (a4, a3, C_SYMBOL_NAME(_rtld_global_ro), \
80 RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
82 LDR_GLOBAL (a4, a3, C_SYMBOL_NAME(_dl_hwcap), 0)
88 tst a4, #HWCAP_ARM_VFP
92 /* Restore the VFP registers. */
93 /* Following instruction is vldmia ip!, {d8-d15}. */
94 ldc p11, cr8, [r12], #64
97 #ifndef ARM_ASSUME_NO_IWMMXT
98 tst a4, #HWCAP_ARM_IWMMXT
101 /* Restore the call-preserved iWMMXt registers. */
102 /* Following instructions are wldrd wr10, [ip], #8 (etc.) */
103 ldcl p1, cr10, [r12], #8
104 ldcl p1, cr11, [r12], #8
105 ldcl p1, cr12, [r12], #8
106 ldcl p1, cr13, [r12], #8
107 ldcl p1, cr14, [r12], #8
108 ldcl p1, cr15, [r12], #8
112 /* longjmp_target probe expects longjmp first argument (4@r0), second
113 argument (-4@r1), and target address (4@r14), respectively. */
114 LIBC_PROBE (longjmp_target, 3, 4@r0, -4@r1, 4@r14)
116 movs r0, r1 /* get the return value in place */
118 moveq r0, #1 /* can't let setjmp() return zero! */