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/* longjmp for ARM.
Copyright (C) 1997, 1998 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/>. */
#include <features.h>
#include <bits/arm_asm.h>
.global __longjmp
.type __longjmp,%function
.align 2
#if defined(THUMB1_ONLY)
.thumb_func
__longjmp:
mov r2, r0
movs r0, r1
/* can't let setjmp() return zero! */
bne 1f
mov r0, #1
1:
mov r1, r2
/* Restore registers, shuffling them through low regs. */
add r2, #(4 * 4)
ldmia r2!, {r4, r5, r6, r7}
mov r8, r4
mov r9, r5
mov sl, r6
mov fp, r7
ldmia r2!, {r4, r5}
mov sp, r4
mov lr, r5
ldmia r1!, {r4, r5, r6, r7}
bx lr
#else
__longjmp:
mov ip, r0 /* save jmp_buf pointer */
movs r0, r1 /* get the return value in place */
IT(t, eq)
moveq r0, #1 /* can't let setjmp() return zero! */
#if defined(__thumb2__)
/* Thumb-2 does not allow loading sp with ldm. */
ldmia ip!, {v1-v6, sl, fp}
ldr sp, [ip], #4
ldr lr, [ip], #4
#else
ldmia ip!, {v1-v6, sl, fp, sp, lr}
#endif
#if defined __UCLIBC_HAS_FLOATS__ && ! defined __UCLIBC_HAS_SOFT_FLOAT__
#ifdef __VFP_FP__
/* Restore the VFP registers. */
/* Following instruction is fldmiax ip!, {d8-d15}. */
ldc p11, cr8, [r12], #68
/* Restore the floating-point status register. */
ldr r1, [ip], #4
/* Following instruction is fmxr fpscr, r1. */
mcr p10, 7, r1, cr1, cr0, 0
# elif defined __MAVERICK__
cfldrd mvd4, [ip], #8 ; nop
cfldrd mvd5, [ip], #8 ; nop
cfldrd mvd6, [ip], #8 ; nop
cfldrd mvd7, [ip], #8 ; nop
cfldrd mvd8, [ip], #8 ; nop
cfldrd mvd9, [ip], #8 ; nop
cfldrd mvd10, [ip], #8 ; nop
cfldrd mvd11, [ip], #8 ; nop
cfldrd mvd12, [ip], #8 ; nop
cfldrd mvd13, [ip], #8 ; nop
cfldrd mvd14, [ip], #8 ; nop
cfldrd mvd15, [ip], #8
# else
lfmfd f4, 4, [ip] ! /* load the floating point regs */
# endif
#endif
#ifdef __IWMMXT__
/* Restore the call-preserved iWMMXt registers. */
/* Following instructions are wldrd wr10, [ip], #8 (etc.) */
ldcl p1, cr10, [r12], #8
ldcl p1, cr11, [r12], #8
ldcl p1, cr12, [r12], #8
ldcl p1, cr13, [r12], #8
ldcl p1, cr14, [r12], #8
ldcl p1, cr15, [r12], #8
#endif
#if defined(__USE_BX__)
bx lr
#else
mov pc, lr
#endif
#endif
.size __longjmp,.-__longjmp
libc_hidden_def(__longjmp)
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