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/* longjmp for ARM.
Copyright (C) 1997-2013 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
<http://www.gnu.org/licenses/>. */
/* ??? Needs more rearrangement for the LDM to handle thumb mode. */
#define NO_THUMB
#include <sysdep.h>
#include <bits/setjmp.h>
#include <rtld-global-offsets.h>
#include <arm-features.h>
/* __longjmp(jmpbuf, val) */
ENTRY (__longjmp)
mov ip, r0
movs r0, r1 /* get the return value in place */
moveq r0, #1 /* can't let setjmp() return zero! */
#ifdef CHECK_SP
sfi_breg ip, \
ldr r4, [\B, #32] /* jmpbuf's sp */
cfi_undefined (r4)
CHECK_SP (r4)
#endif
sfi_sp sfi_breg ip, \
ldmia \B!, JMP_BUF_REGLIST
cfi_restore (v1)
cfi_restore (v2)
cfi_restore (v3)
cfi_restore (v4)
cfi_restore (v5)
cfi_restore (v6)
cfi_restore (sl)
cfi_restore (fp)
cfi_restore (sp)
cfi_restore (lr)
#if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__
# define NEED_HWCAP 1
#endif
#ifdef NEED_HWCAP
# ifdef IS_IN_rtld
ldr a2, 1f
ldr a3, .Lrtld_local_ro
0: add a2, pc, a2
add a2, a2, a3
ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
# else
# ifdef PIC
ldr a2, 1f
ldr a3, .Lrtld_global_ro
0: add a2, pc, a2
ldr a2, [a2, a3]
ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
# else
ldr a2, .Lhwcap
ldr a2, [a2, #0]
# endif
# endif
#endif
#ifdef __SOFTFP__
tst a2, #HWCAP_ARM_VFP
beq .Lno_vfp
#endif
/* Restore the VFP registers. */
/* Following instruction is vldmia ip!, {d8-d15}. */
sfi_breg r12, \
ldc p11, cr8, [\B], #64
/* Restore the floating-point status register. */
sfi_breg ip, \
ldr a3, [\B], #4
/* Following instruction is fmxr fpscr, a3. */
mcr p10, 7, a3, cr1, cr0, 0
.Lno_vfp:
#ifndef ARM_ASSUME_NO_IWMMXT
tst a2, #HWCAP_ARM_IWMMXT
beq .Lno_iwmmxt
/* Restore the call-preserved iWMMXt registers. */
/* Following instructions are wldrd wr10, [ip], #8 (etc.) */
sfi_breg r12, \
ldcl p1, cr10, [\B], #8
sfi_breg r12, \
ldcl p1, cr11, [\B], #8
sfi_breg r12, \
ldcl p1, cr12, [\B], #8
sfi_breg r12, \
ldcl p1, cr13, [\B], #8
sfi_breg r12, \
ldcl p1, cr14, [\B], #8
sfi_breg r12, \
ldcl p1, cr15, [\B], #8
.Lno_iwmmxt:
#endif
DO_RET(lr)
#ifdef NEED_HWCAP
# ifdef IS_IN_rtld
1: .long _GLOBAL_OFFSET_TABLE_ - 0b - PC_OFS
.Lrtld_local_ro:
.long C_SYMBOL_NAME(_rtld_local_ro)(GOTOFF)
# else
# ifdef PIC
1: .long _GLOBAL_OFFSET_TABLE_ - 0b - PC_OFS
.Lrtld_global_ro:
.long C_SYMBOL_NAME(_rtld_global_ro)(GOT)
# else
.Lhwcap:
.long C_SYMBOL_NAME(_dl_hwcap)
# endif
# endif
#endif
END (__longjmp)
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