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Roland McGrath 1992-02-12 19:09:12 +00:00
parent 4a7b5e14f6
commit 61de137299
1 changed files with 48 additions and 0 deletions
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sysdeps/m68k/setjmp.c Normal file
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/* Copyright (C) 1991 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <setjmp.h>
/* Save the current program position in ENV and return 0. */
int
DEFUN(__setjmp, (env), jmp_buf env)
{
/* Save data registers D1 through D7. */
asm volatile("movem%.l d1-d7, %0" : : "m" (env[0].__dregs));
/* Save return address in place of register A0. */
env[0].__aregs[0] = (PTR) ((PTR *) &env)[-1];
/* Save address registers A1 through A5. */
asm volatile("movem%.l a1-a5, %0" : : "m" (env[0].__aregs[1]));
/* Save caller's FP, not our own. */
env[0].__fp = (PTR) ((PTR *) &env)[-2];
/* Save caller's SP, not our own. */
env[0].__sp = (PTR) &env;
#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
/* Save floating-point (68881) registers FP0 through FP7. */
asm volatile("fmovem%.x fp0-fp7, %0" : : "m" (env[0].__fpregs));
#endif
return 0;
}