62 lines
2.0 KiB
C
62 lines
2.0 KiB
C
/* Copyright (C) 1991-2022 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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<https://www.gnu.org/licenses/>. */
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#include <setjmp.h>
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#include <stdlib.h>
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/* Jump to the position specified by ENV, causing the
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setjmp call there to return VAL, or 1 if VAL is 0. */
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void
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__longjmp (__jmp_buf env, int val)
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{
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/* This restores the FP and SP that setjmp's caller had,
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and puts the return address into A0 and VAL into D0. */
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#ifdef CHECK_SP
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CHECK_SP (env[0].__sp);
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#endif
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#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
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/* Restore the floating-point registers. */
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asm volatile("fmovem%.x %0, %/fp0-%/fp7" :
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/* No outputs. */ : "g" (env[0].__fpregs[0]));
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#elif defined (__mcffpu__)
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asm volatile("fmovem %0, %/fp0-%/fp7" :
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/* No outputs. */ : "m" (env[0].__fpregs[0]));
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#endif
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/* Put VAL in D0. */
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asm volatile("move%.l %0, %/d0" : /* No outputs. */ :
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"g" (val == 0 ? 1 : val) : "d0");
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asm volatile(/* Restore the data and address registers. */
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"movem%.l %0, %/d1-%/d7/%/a0-%/a7\n"
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/* Return to setjmp's caller. */
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#ifdef __motorola__
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"jmp (%/a0)"
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#else
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"jmp %/a0@"
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#endif
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: /* No outputs. */ : "g" (env[0].__dregs[0])
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/* We don't bother with the clobbers,
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because this code always jumps out anyway. */
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);
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/* Avoid `volatile function does return' warnings. */
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for (;;);
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}
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