From 61de13729941b2a4f1638c39f9cfbbcfb3ee6680 Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Wed, 12 Feb 1992 19:09:12 +0000 Subject: [PATCH] Initial revision --- sysdeps/m68k/setjmp.c | 48 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 sysdeps/m68k/setjmp.c diff --git a/sysdeps/m68k/setjmp.c b/sysdeps/m68k/setjmp.c new file mode 100644 index 0000000..45bf8e6 --- /dev/null +++ b/sysdeps/m68k/setjmp.c @@ -0,0 +1,48 @@ +/* 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 +#include + + +/* 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; +} -- 2.7.4