54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
/* Copyright (C) 1991, 1992 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 <ansidecl.h>
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#include <setjmp.h>
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#ifndef __GNUC__
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#error This file uses GNU C extensions; you must compile with GCC.
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#endif
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/* Save the current program position in ENV and return 0. */
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int
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DEFUN(__setjmp, (env), jmp_buf env)
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{
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/* Save data registers D1 through D7. */
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asm volatile("movem%.l d1-d7, %0" : : "m" (env[0].__dregs[0]));
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/* Save return address in place of register A0. */
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env[0].__aregs[0] = (PTR) ((PTR *) &env)[-1];
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/* Save address registers A1 through A5. */
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asm volatile("movem%.l a1-a5, %0" : : "m" (env[0].__aregs[1]));
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/* Save caller's FP, not our own. */
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env[0].__fp = (PTR) ((PTR *) &env)[-2];
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/* Save caller's SP, not our own. */
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env[0].__sp = (PTR) &env;
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#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
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/* Save floating-point (68881) registers FP0 through FP7. */
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asm volatile("fmovem%.x fp0-fp7, %0" : : "m" (env[0].__fpregs[0]));
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#endif
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return 0;
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}
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