mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 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>
|
|
#include <stdlib.h>
|
|
|
|
/* Jump to the position specified by ENV, causing the
|
|
setjmp call there to return VAL, or 1 if VAL is 0. */
|
|
void
|
|
__longjmp (const __jmp_buf env, int val)
|
|
{
|
|
/* This restores the FP and SP that setjmp's caller had,
|
|
and puts the return address into A0 and VAL into D0. */
|
|
|
|
#if defined(__HAVE_68881__) || defined(__HAVE_FPU__)
|
|
/* Restore the floating-point registers. */
|
|
asm volatile("fmovem%.x %0, fp0-fp7" :
|
|
/* No outputs. */ : "g" (env[0].__fpregs[0]) :
|
|
"fp0", "fp1", "fp2", "fp3", "fp4", "fp5", "fp6", "fp7");
|
|
#endif
|
|
|
|
/* Put VAL in D0. */
|
|
asm volatile("move%.l %0, d0" : /* No outputs. */ :
|
|
"g" (val == 0 ? 1 : val) : "d0");
|
|
|
|
asm volatile(/* Restore the data and address registers. */
|
|
"movem%.l %0, d1-d7/a0-a7\n"
|
|
/* Return to setjmp's caller. */
|
|
#ifdef __motorola__
|
|
"jmp (a0)"
|
|
#else
|
|
"jmp a0@"
|
|
#endif
|
|
: /* No outputs. */ : "g" (env[0].__dregs[0])
|
|
/* We don't bother with the clobbers,
|
|
because this code always jumps out anyway. */
|
|
);
|
|
|
|
/* This call avoids `volatile function does return' warnings. */
|
|
abort ();
|
|
}
|