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/* setjmp for ARM.
Copyright (C) 1997-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<https://www.gnu.org/licenses/>. */
#include <sysdep.h>
#include <stap-probe.h>
#include <bits/setjmp.h>
#include <rtld-global-offsets.h>
#include <arm-features.h>
ENTRY (__sigsetjmp)
#ifdef PTR_MANGLE
PTR_MANGLE_LOAD (a3, ip)
#endif
mov ip, r0
/* setjmp probe expects sigsetjmp first argument (4@r0), second
argument (-4@r1), and target address (4@r14), respectively. */
LIBC_PROBE (setjmp, 3, 4@r0, -4@r1, 4@r14)
/* Save sp and lr */
#ifdef PTR_MANGLE
mov a4, sp
PTR_MANGLE2 (a4, a4, a3)
str a4, [ip], #4
PTR_MANGLE2 (a4, lr, a3)
str a4, [ip], #4
#else
str sp, [ip], #4
str lr, [ip], #4
#endif
/* Save registers */
stmia ip!, JMP_BUF_REGLIST
#if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__
# define NEED_HWCAP 1
#endif
#ifdef NEED_HWCAP
/* Check if we have a VFP unit. */
# if IS_IN (rtld)
LDST_PCREL (ldr, a3, a4, \
C_SYMBOL_NAME(_rtld_local_ro) \
+ RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
# else
# ifdef SHARED
LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_rtld_global_ro), \
RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
# else
LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_dl_hwcap), 0)
# endif
# endif
#endif
#ifdef __SOFTFP__
tst a3, #HWCAP_ARM_VFP
beq .Lno_vfp
#endif
/* Store the VFP registers.
Don't use VFP instructions directly because this code
is used in non-VFP multilibs. */
/* Following instruction is vstmia ip!, {d8-d15}. */
stc p11, cr8, [ip], #64
.Lno_vfp:
#ifndef ARM_ASSUME_NO_IWMMXT
tst a3, #HWCAP_ARM_IWMMXT
beq .Lno_iwmmxt
/* Save the call-preserved iWMMXt registers. */
/* Following instructions are wstrd wr10, [ip], #8 (etc.) */
stcl p1, cr10, [r12], #8
stcl p1, cr11, [r12], #8
stcl p1, cr12, [r12], #8
stcl p1, cr13, [r12], #8
stcl p1, cr14, [r12], #8
stcl p1, cr15, [r12], #8
.Lno_iwmmxt:
#endif
/* Make a tail call to __sigjmp_save; it takes the same args. */
B PLTJMP(C_SYMBOL_NAME(__sigjmp_save))
END (__sigsetjmp)
hidden_def (__sigsetjmp)
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