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134 lines
3.1 KiB
ArmAsm
134 lines
3.1 KiB
ArmAsm
/* longjmp for ARM.
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Copyright (C) 1997-2013 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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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
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<http://www.gnu.org/licenses/>. */
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/* ??? Needs more rearrangement for the LDM to handle thumb mode. */
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#define NO_THUMB
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#include <sysdep.h>
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#include <bits/setjmp.h>
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#include <rtld-global-offsets.h>
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#include <arm-features.h>
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/* __longjmp(jmpbuf, val) */
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ENTRY (__longjmp)
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mov ip, r0
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movs r0, r1 /* get the return value in place */
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moveq r0, #1 /* can't let setjmp() return zero! */
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#ifdef CHECK_SP
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sfi_breg ip, \
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ldr r4, [\B, #32] /* jmpbuf's sp */
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cfi_undefined (r4)
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CHECK_SP (r4)
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#endif
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sfi_sp sfi_breg ip, \
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ldmia \B!, JMP_BUF_REGLIST
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cfi_restore (v1)
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cfi_restore (v2)
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cfi_restore (v3)
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cfi_restore (v4)
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cfi_restore (v5)
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cfi_restore (v6)
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cfi_restore (sl)
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cfi_restore (fp)
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cfi_restore (sp)
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cfi_restore (lr)
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#if !defined ARM_ASSUME_NO_IWMMXT || defined __SOFTFP__
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# define NEED_HWCAP 1
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#endif
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#ifdef NEED_HWCAP
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# ifdef IS_IN_rtld
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ldr a2, 1f
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ldr a3, .Lrtld_local_ro
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0: add a2, pc, a2
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add a2, a2, a3
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ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
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# else
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# ifdef PIC
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ldr a2, 1f
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ldr a3, .Lrtld_global_ro
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0: add a2, pc, a2
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ldr a2, [a2, a3]
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ldr a2, [a2, #RTLD_GLOBAL_RO_DL_HWCAP_OFFSET]
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# else
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ldr a2, .Lhwcap
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ldr a2, [a2, #0]
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# endif
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# endif
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#endif
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#ifdef __SOFTFP__
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tst a2, #HWCAP_ARM_VFP
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beq .Lno_vfp
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#endif
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/* Restore the VFP registers. */
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/* Following instruction is vldmia ip!, {d8-d15}. */
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sfi_breg r12, \
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ldc p11, cr8, [\B], #64
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/* Restore the floating-point status register. */
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sfi_breg ip, \
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ldr a3, [\B], #4
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/* Following instruction is fmxr fpscr, a3. */
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mcr p10, 7, a3, cr1, cr0, 0
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.Lno_vfp:
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#ifndef ARM_ASSUME_NO_IWMMXT
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tst a2, #HWCAP_ARM_IWMMXT
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beq .Lno_iwmmxt
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/* Restore the call-preserved iWMMXt registers. */
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/* Following instructions are wldrd wr10, [ip], #8 (etc.) */
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sfi_breg r12, \
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ldcl p1, cr10, [\B], #8
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sfi_breg r12, \
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ldcl p1, cr11, [\B], #8
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sfi_breg r12, \
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ldcl p1, cr12, [\B], #8
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sfi_breg r12, \
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ldcl p1, cr13, [\B], #8
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sfi_breg r12, \
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ldcl p1, cr14, [\B], #8
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sfi_breg r12, \
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ldcl p1, cr15, [\B], #8
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.Lno_iwmmxt:
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#endif
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DO_RET(lr)
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#ifdef NEED_HWCAP
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# ifdef IS_IN_rtld
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1: .long _GLOBAL_OFFSET_TABLE_ - 0b - PC_OFS
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.Lrtld_local_ro:
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.long C_SYMBOL_NAME(_rtld_local_ro)(GOTOFF)
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# else
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# ifdef PIC
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1: .long _GLOBAL_OFFSET_TABLE_ - 0b - PC_OFS
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.Lrtld_global_ro:
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.long C_SYMBOL_NAME(_rtld_global_ro)(GOT)
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# else
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.Lhwcap:
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.long C_SYMBOL_NAME(_dl_hwcap)
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# endif
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# endif
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#endif
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END (__longjmp)
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