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initial import

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This commit is contained in:
Roland McGrath
1995-02-18 01:27:10 +00:00
commit 28f540f45b
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sysdeps/m68k/setjmp.c Normal file
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/* Copyright (C) 1991, 1992, 1994 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 <setjmp.h>
/* Save the current program position in ENV and return 0. */
int
__sigsetjmp (jmp_buf env, int savemask)
{
/* Save data registers D1 through D7. */
asm volatile ("movem%.l d1-d7, %0" : : "m" (env[0].__jmpbuf[0].__dregs[0]));
/* Save return address in place of register A0. */
env[0].__jmpbuf[0].__aregs[0] = ((void **) &env)[-1];
/* Save address registers A1 through A5. */
asm volatile ("movem%.l a1-a5, %0" : : "m" (env[0].__jmpbuf[0].__aregs[1]));
/* Save caller's FP, not our own. */
env[0].__jmpbuf[0].__fp = ((void **) &env)[-2];
/* Save caller's SP, not our own. */
env[0].__jmpbuf[0].__sp = (void *) &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].__jmpbuf[0].__fpregs[0]));
#endif
/* Save the signal mask if requested. */
return __sigjmp_save (env, savemask);
}