glibc/sysdeps/arm/setjmp.S

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/* setjmp for ARM.
Copyright (C) 1997-2015 Free Software Foundation, Inc.
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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
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License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
#include <stap-probe.h>
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#include <bits/setjmp.h>
#include <rtld-global-offsets.h>
#include <arm-features.h>
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ENTRY (__sigsetjmp)
#ifdef PTR_MANGLE
PTR_MANGLE_LOAD (a3, ip)
#endif
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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)
sfi_breg ip, \
str a4, [\B], #4
PTR_MANGLE2 (a4, lr, a3)
sfi_breg ip, \
str a4, [\B], #4
#else
sfi_breg ip, \
str sp, [\B], #4
sfi_breg ip, \
str lr, [\B], #4
#endif
/* Save registers */
sfi_breg ip, \
stmia \B!, JMP_BUF_REGLIST
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#if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__
# define NEED_HWCAP 1
#endif
#ifdef NEED_HWCAP
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/* Check if we have a VFP unit. */
Remove IS_IN_rtld Replace with IS_IN (rtld). Generated code is unchanged on x86_64. * elf/Makefile (CPPFLAGS-.os): Remove IS_IN_rtld. * elf/dl-open.c: Use IS_IN (rtld) instead if IS_IN_rtld. * elf/rtld-Rules: Likewise. * elf/setup-vdso.h: Likewise. * include/assert.h: Likewise. * include/bits/stdlib-float.h: Likewise. * include/errno.h: Likewise. * include/sys/stat.h: Likewise. * include/unistd.h: Likewise. * sysdeps/aarch64/setjmp.S: Likewise. * sysdeps/alpha/setjmp.S: Likewise. * sysdeps/arm/__longjmp.S: Likewise. * sysdeps/arm/aeabi_unwind_cpp_pr1.c: Likewise. * sysdeps/arm/setjmp.S: Likewise. * sysdeps/arm/sysdep.h: Likewise. * sysdeps/generic/_itoa.h: Likewise. * sysdeps/generic/dl-sysdep.h: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/i386/dl-tls.h: Likewise. * sysdeps/i386/setjmp.S: Likewise. * sysdeps/m68k/setjmp.c: Likewise. * sysdeps/mach/hurd/dl-execstack.c: Likewise. * sysdeps/mach/hurd/opendir.c: Likewise. * sysdeps/posix/getcwd.c: Likewise. * sysdeps/posix/opendir.c: Likewise. * sysdeps/posix/profil.c: Likewise. * sysdeps/powerpc/dl-procinfo.h: Likewise. * sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S: Likewise. * sysdeps/powerpc/powerpc32/fpu/setjmp-common.S: Likewise. * sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h: Likewise. * sysdeps/powerpc/powerpc32/setjmp-common.S: Likewise. * sysdeps/powerpc/powerpc64/__longjmp-common.S: Likewise. * sysdeps/powerpc/powerpc64/setjmp-common.S: Likewise. * sysdeps/s390/dl-tls.h: Likewise. * sysdeps/s390/s390-32/setjmp.S: Likewise. * sysdeps/s390/s390-64/setjmp.S: Likewise. * sysdeps/sh/sh3/setjmp.S: Likewise. * sysdeps/sh/sh4/setjmp.S: Likewise. * sysdeps/unix/alpha/sysdep.h: Likewise. * sysdeps/unix/arm/sysdep.S: Likewise. * sysdeps/unix/i386/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/aarch64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/getcwd.c: Likewise. * sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/ia64/setjmp.S: Likewise. * sysdeps/unix/sysv/linux/ia64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise. * sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h: Likewise. * sysdeps/unix/sysv/linux/m68k/m68k-helpers.S: Likewise. * sysdeps/unix/sysv/linux/microblaze/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sh/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sh/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/tile/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/tile/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise. * sysdeps/unix/x86_64/sysdep.S: Likewise. * sysdeps/x86_64/setjmp.S: Likewise.
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# if IS_IN (rtld)
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LDST_PCREL (ldr, a3, a4, \
C_SYMBOL_NAME(_rtld_local_ro) \
+ RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
# else
# ifdef SHARED
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LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_rtld_global_ro), \
RTLD_GLOBAL_RO_DL_HWCAP_OFFSET)
# else
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LDR_GLOBAL (a3, a4, C_SYMBOL_NAME(_dl_hwcap), 0)
# endif
# endif
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#endif
#ifdef __SOFTFP__
tst a3, #HWCAP_ARM_VFP
beq .Lno_vfp
#endif
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/* 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}. */
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sfi_breg ip, \
stc p11, cr8, [\B], #64
.Lno_vfp:
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#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.) */
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sfi_breg r12, \
stcl p1, cr10, [\B], #8
sfi_breg r12, \
stcl p1, cr11, [\B], #8
sfi_breg r12, \
stcl p1, cr12, [\B], #8
sfi_breg r12, \
stcl p1, cr13, [\B], #8
sfi_breg r12, \
stcl p1, cr14, [\B], #8
sfi_breg r12, \
stcl p1, cr15, [\B], #8
.Lno_iwmmxt:
#endif
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/* Make a tail call to __sigjmp_save; it takes the same args. */
B PLTJMP(C_SYMBOL_NAME(__sigjmp_save))
END (__sigsetjmp)
hidden_def (__sigsetjmp)