/* Copyright (C) 1991, 1992 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 #ifndef __GNUC__ #error This file uses GNU C extensions; you must compile with GCC. #endif /* 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[0])); /* 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]; /* XXX FIX ME */ /* * The Amiga GCC uses A5 as the frame pointer, rather than A6, so this * code loses on that compiler, since this code expects A6 to be the * frame pointer. * This change fix will only be compiled occur if __amiga__ is defined. * * The long term solution is to create a "linux/68k" gcc which uses a6 * as the frame pointer. */ #ifdef __amiga__ env[0].__aregs[5] = env[0].__fp; asm volatile ("move%.l a6, %0" : : "m" (env[0].__fp)); #endif /* XXX */ /* 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[0])); #endif return 0; }