72 lines
2 KiB
C
72 lines
2 KiB
C
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/* -*-comment-start: "//";comment-end:""-*-
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* GNU Mes --- Maxwell Equations of Software
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* Copyright © 2017,2018 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
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*
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* This file is part of GNU Mes.
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*
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* GNU Mes is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* GNU Mes is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <setjmp.h>
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void
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longjmp (jmp_buf env, int val)
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{
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#if 0 //MES_CCAMD64
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asm ("push___%rdi");
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#endif
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val = val == 0 ? 1 : val;
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#if 0 //MES_CCAMD64
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asm ("pop____%rdi");
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asm ("mov____0x8(%rdi),%rbp !0x00"); // env->__bp
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asm ("mov____0x8(%rdi),%rbx !0x08"); // env->__pc
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asm ("mov____0x8(%rdi),%rsp !0x10"); // env->__sp
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asm ("jmp____*%rbx"); // jmp *PC
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#else
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asm ("mov____0x8(%rbp),%rbp !0x10"); // env*
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asm ("mov____0x8(%rbp),%rbx !0x08"); // env.__pc
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asm ("mov____0x8(%rbp),%rsp !0x10"); // env.__sp
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asm ("mov____0x8(%rbp),%rbp !0x00"); // env.__bp
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asm ("jmp____*%rbx");
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#endif
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// not reached
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exit (42);
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}
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int
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setjmp (__jmp_buf *env)
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{
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#if 0 //MES_CCAMD64
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asm ("mov____%rbp,%rax");
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asm ("add____$i32,%rax %0x80");
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asm ("mov____0x8(%rax),%rsi !0x00");
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asm ("mov____%rsi,0x8(%rdi) !0x00");
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asm ("mov____0x8(%rax),%rsi !0x08");
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asm ("mov____%rsi,0x8(%rdi) !0x08");
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asm ("mov____%rax,%rsi");
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asm ("add____$i32,%rsi %0x10");
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asm ("mov____%rsi,0x8(%rdi) !0x10");
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#else
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long *p = (long*)&env;
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env[0].__bp = p[-2];
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env[0].__pc = p[-1];
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env[0].__sp = (long)&env;
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#endif
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return 0;
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}
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