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58 lines
2.0 KiB
C
58 lines
2.0 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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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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__NORETURN
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void
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__longjmp (const __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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#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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"fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7");
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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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/* This call avoids `volatile function does return' warnings. */
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abort ();
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}
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